Cooking utensil

Abstract

The invention relates to the technical field of kitchen utensils, and provides a cooking utensil. The cooking utensil comprises a base and at least two steaming grids which are arranged on the base in a stacked mode, air ports are formed in the side portions of the steaming grids, the base is provided with a steam supply structure, the steam supply structure comprises a steam generation assembly and a plurality of steam conveying assemblies, the steam conveying assemblies are provided with steam generation cavities, and the number of the steam conveying assemblies is not smaller than that of the steaming grids. Each steam conveying assembly comprises a conveying channel provided with an air inlet and an air outlet and a blocking assembly arranged at the air outlet of the conveying channel. When the steaming grid corresponding to the conveying channel is not put in, the blocking assembly is in a closed state, and when the steaming grid corresponding to the conveying channel is put in, the blocking assembly is in an open state. According to the cooking utensil provided by the invention, the distribution uniformity of steam in each layer of steaming grids is improved, and the problems that the cooking degrees of food materials on the same layer are inconsistent and the cooking degrees of food materials on different layers are inconsistent are solved.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen utensils, and particularly to a cooking appliance. Background Art

[0002] Currently, most of the cookware that can be used for steaming are mostly provided with two or more steaming grids, and the ingredients are heated by steam at the bottom, which is beneficial to steaming more ingredients at one time. However, since the steam flows from bottom to top during the cooking process, the ingredients in the lower layer preferentially absorb the heat of the steam, resulting in uneven heating of the ingredients in the upper layer and the problem of different cooking degrees of the ingredients in the upper and lower layers. Moreover, when cooking a large amount of ingredients, the ingredients are likely to block the ventilation holes at the bottom of the steaming grid, and the steam will condense when contacting the low-temperature ingredients during the flow process, resulting in a lower steam temperature when the steam reaches the upper steaming grid compared to the lower steaming grid, which will also affect the cooking degree of the ingredients in the upper layer. At the same time, due to the heat consumption of the steam during the flow process, the steam temperature at the top of the ingredients in the same layer is lower than the steam temperature at the bottom, resulting in inconsistent cooking degrees of the food in the same layer. Summary of the Invention

[0003] Based on this, it is necessary to provide a cooking appliance to improve the uniformity of steam distribution in each steaming grid, alleviate the problems of inconsistent cooking degrees of the ingredients in the same layer and different layers, and thereby improve the cooking effect of the ingredients.

[0004] A cooking appliance includes a base and at least two stacked steaming grids provided on the base. An air port is provided on the side of the steaming grid. The base is provided with a steam supply structure. The steam supply structure includes a steam generating assembly and a plurality of steam conveying assemblies. The steam generating assembly is provided with a steam generating chamber. The number of the steam conveying assemblies is not less than the number of the steaming grids. Each of the steam conveying assemblies includes a conveying channel provided with an air inlet and an air outlet and a blocking assembly provided at the air outlet of the conveying channel. The air inlet of the conveying channel is communicated with the steam generating chamber, and the air outlet is correspondingly arranged with the air port of the steaming grid. When the steaming grid corresponding to the conveying channel is not placed, the blocking assembly is in a closed state. When the steaming grid corresponding to the conveying channel is placed, the blocking assembly is in an open state.

[0005] It can be understood that when the steaming grid is placed on the base for cooking, the blocking component at the air outlet of the conveying channel corresponding to the steaming grid is opened, so that the air outlet of the steaming grid is communicated with the air outlet of the conveying channel. In this way, the steam generated in the steam generation chamber can be transported to the conveying channel and then to the inside of the steaming grid through the conveying channel to meet the steaming of the ingredients in the steaming grid. Such a setting, on the one hand, a conveying channel for steam supply is separately provided for each steaming space corresponding to the steaming grid, so as to ensure that there is sufficient steam in each steaming space corresponding to the steaming grid for heating the ingredients, which is conducive to the uniform distribution of steam; on the other hand, steam is supplied from the side of the steaming grid, reducing the heat loss during the layer-by-layer transfer of steam, further improving the uniformity of steam distribution in each steaming grid and the consistency of the cooking degree of the ingredients. In this process, the opening and closing state of the corresponding conveying channel is adjusted by the blocking component according to the use state of the steaming grid, effectively ensuring the steam volume of the corresponding steaming grid during steaming.

[0006] In some embodiments, the blocking component further includes a blocking body, and a blocking body is movably provided at the air outlet of each conveying channel, which is convenient to move the blocking body to open and close the corresponding conveying channel.

[0007] In some embodiments, a sealing member is provided at the air outlet of the conveying channel or on the blocking body to improve the sealing performance of the blocking at the air outlet of the conveying channel, ensure good sealing of the conveying channel when the steaming grid is not placed, and reduce air leakage.

[0008] In some embodiments, a triggering structure is provided on the side of the steaming grid. When the steaming grid corresponding to the conveying channel is placed, the blocking body is opened by the triggering structure. That is to say, the triggering structure can cooperate with the blocking body according to the use state of the steaming grid to drive the blocking body to move to open the corresponding conveying channel when the steaming grid is placed, which is more convenient to operate.

[0009] In some embodiments, the triggering structure includes a top contact protrusion protruding from the side wall of the corresponding steaming grid, and the air outlet is provided on the top contact protrusion. That is to say, the top contact protrusion can push the corresponding blocking body to move towards the inside of the conveying channel when the steaming grid is placed to release the blocking of the air outlet of the conveying channel; moreover, by using the setting of the top contact protrusion, the distance between the steaming grid and the steam conveying component is increased, avoiding problems such as abrasion and scraping caused by direct contact between the two.

[0010] In some embodiments, each conveying channel is provided with an inclined section at its own outlet, the inclined section is inclined downward from top to bottom and is tapered, and the blocking body is configured as a gravity ball, and the gravity ball is accommodated in the inclined section.

[0011] It is understandable that the provision of the inclined section facilitates guiding the gravity ball to press on the seal, improving the sealing performance; moreover, with such a provision, the structure is simple and the cost is relatively low.

[0012] In some of the embodiments, the plugging assembly further includes a first elastic member, and the first elastic member is configured to apply a force to the plugging body towards the air outlet of the conveying channel. In this way, it is convenient for the plugging body to return to the plugged state after the steaming grid is removed, which is conducive to secondary use.

[0013] In some of the embodiments, a channel wall is provided at the air outlet end of the conveying channel, and an air outlet is formed on the channel wall; the plugging assembly further includes a connecting rod, a second elastic member and a sensing member, the connecting rod is hinged to the channel wall, the plugging body and the sensing member are respectively disposed at two ends of the connecting rod, and the second elastic member abuts between the channel wall and the sensing member; the triggering structure further includes a triggering member protruding from the side wall of the steaming grid, and the triggering member is correspondingly arranged with the sensing member.

[0014] That is to say, the cooperation between the triggering member and the sensing member can be utilized to open the plugging body, and the top contact protrusion does not need to be inserted into the conveying channel, reducing the length of the top contact protrusion and reducing the storage interference.

[0015] In some of the embodiments, the sensing member and the triggering member are magnetically adsorbed, which has a low cost and is more convenient for assembly.

[0016] In some of the embodiments, the steaming grid is stacked above the steam generating chamber, and air-permeable holes are formed in the bottom wall of the steaming grid. A juice receiving tray is further provided between the steam generating chamber and the steaming grid, and a steam outlet communicating the steam generating chamber with the bottommost steaming grid is provided on the steam generating assembly or the juice receiving tray.

[0017] That is to say, this cooking appliance combines the steam heating from below and the steam heating from the side, and through the steam delivery in multiple directions, the steam distribution uniformity in each steaming grid is improved.

[0018] In some of the embodiments, a micro-pressure valve is provided at the steam outlet; alternatively, the steam outlet includes at least one small hole or capillary small hole; alternatively, a resistance valve for controlling the on-off of the steam outlet is provided below the steam outlet. With such a provision, the flow pressure at the steam outlet can be effectively controlled, which is conducive to distributing more uniform steam from the bottom and side of the steaming rack. That is to say, by using the provision of the micro-pressure valve or small holes and capillary small holes, the flow pressure at the steam outlet is maintained; moreover, the provision of the resistance valve can keep the steam generating chamber in a slightly pressurized state, thereby keeping the water level in the steam generating chamber relatively low and improving the heating efficiency.

[0019] In some of these embodiments, the resistance valve includes a second partition plate and a pressure member. The second partition plate is connected to the cavity wall of the steam generation cavity and is provided with an air outlet hole. The pressure member is movably disposed at the air outlet hole and can be opened and closed under the action of the pressure in the steam generation cavity.

[0020] It can be understood that the setting of the air outlet hole is conducive to controlling the flow cross-section, and combined with the cooperation of the pressure member, the maintenance of a micro-pressure state can be achieved.

[0021] In some of these embodiments, the steam outlet of the base includes a first steam outlet and a second steam outlet, which are arranged at intervals and have different flow cross-sections; the cooking appliance further includes a control lever and a shielding member connected to the control lever. The control lever can drive the shielding member to selectively block one of the first steam outlet and the second steam outlet.

[0022] That is to say, by adjusting the position of the shielding member through the control lever, it is conducive to adjusting different flow resistances at the base, and further adapting to the conveying channel at the side.

[0023] In some of these embodiments, the steam generation assembly further includes a water tank and a first partition plate disposed in the water tank. The first partition plate divides the cavity of the water tank into a steam generation cavity and a water replenishment cavity, and the water replenishment cavity surrounds the outer peripheral side of the steam generation cavity. The first partition plate is provided with a communication port, and the communication port communicates the steam generation cavity and the water replenishment cavity.

[0024] It can be understood that the water replenishment cavity provides water to the steam generation cavity through the communication port, keeps the water level in the steam generation cavity at a relatively low level, improves the heating efficiency, and is conducive to generating steam faster.

[0025] In some of these embodiments, the steam supply structure further includes a communication channel. One end of the communication channel communicates with the steam generation cavity, and multiple conveying channels are all communicated with the communication channel; the communication channel and / or the conveying channel are provided with the auxiliary heating member.

[0026] It can be understood that the steam in the steam generation cavity is shunted to each conveying channel by using the communication channel, and the steam heat is increased. At the same time, through the setting of a single auxiliary heating member, the steam flowing through the conveying channel can be heated secondarily to enhance the steam heat. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0028] Figure 1 Schematic diagram of a cooking appliance provided by an embodiment of the present application;

[0029] Figure 2 Schematic diagram of a steaming grid in a cooking appliance provided by an embodiment of the present application;

[0030] Figure 3 Partial schematic diagram when the plugging component in a cooking appliance provided by an embodiment of the present application is plugged;

[0031] Figure 4 For Figure 3 Partial schematic diagram when the plugging component in the provided cooking appliance is unplugged;

[0032] Figure 5 Partial schematic diagram when the plugging component in a cooking appliance provided by another embodiment of the present application is plugged;

[0033] Figure 6 For Figure 5 Partial schematic diagram when the plugging component in the provided cooking appliance is unplugged;

[0034] Figure 7 Partial schematic diagram when the plugging component in a cooking appliance provided by yet another embodiment of the present application is plugged;

[0035] Figure 8 For Figure 7 Partial schematic diagram when the plugging component in the provided cooking appliance is unplugged;

[0036] Figure 9 Schematic diagram of a cooking appliance provided by another embodiment of the present application;

[0037] Figure 10 Bottom view of a juice receiving tray in a cooking appliance provided by an embodiment of the present application;

[0038] Figure 11 Schematic diagram of the cooperation between a juice receiving tray and an adjusting component in a cooking appliance provided by an embodiment of the present application;

[0039] Figure 12 Partial schematic diagram when a resistance valve in a cooking appliance provided by an embodiment of the present application is plugged;

[0040] Figure 13 For Figure 12Partial schematic diagram when the resistance valve in the provided cooking appliance makes contact and seals;

[0041] Figure 14 Schematic diagram of a cooking appliance provided by another embodiment of the present application;

[0042] Figure 15 Schematic diagram of a cooking appliance provided by yet another embodiment of the present application;

[0043] Figure 16 Schematic diagram of a cooking appliance provided by still another embodiment of the present application.

[0044] Reference numerals: 10, base; 11, bracket; 20, steaming grid; 21, placing protrusion; 22, ventilation hole; 30, pot lid; 40, steam supply structure; 41, steam generation assembly; 42, steam delivery assembly; 43, communication channel; 44, seal; 45, auxiliary heating element; 50, triggering structure; 51, top contact protrusion; 52, trigger; 60, adjustment assembly; 61, control lever; 62, shielding member; 70, juice receiving tray; 101, steam outlet; 101a, first steam outlet; 101b, second steam outlet; 201, first steaming grid; 202, second steaming grid; 411, water tank; 412, heater; 413, first partition plate; 414, resistance valve; 421, delivery channel; 422, blocking assembly; 423, inclined section; 425, pressing plate; 4221, blocking body; 4222, first elastic member; 4223, connecting rod; 4224, sensing member; 4225, second elastic member; 4226, hinge seat; 1011, small hole; 2001, steaming space; 2002, air port; 4101, steam generation chamber; 4102, water replenishing chamber; 4130, circulation port; 4140, air outlet hole; 4141, second partition plate; 4142, pressure member; 4143, concave cavity; 4231, limiting protrusion; 4401, circulation hole. Detailed implementation manners

[0045] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0046] It should be noted that when a component is referred to as "fixed to" or "provided on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of this application are only for illustrative purposes and do not represent the only implementation.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0048] In this application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0049] Unless otherwise defined, all technical and scientific terms used in the description of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the description of this application includes any and all combinations of one or more of the related listed items.

[0050] At present, some cooking appliances can heat the water in the pot body to the boiling state through the heater at the bottom, and then use the steam to act on the ingredients on the steaming grid to achieve steaming cooking. In order to steam more ingredients at a time, usually two or more steaming grids are arranged in a stacked manner, and ingredients can be placed on each steaming grid. However, since the steam generated during cooking flows from bottom to top, the ingredients in the lower steaming grid can come into contact with the steam and absorb heat first, which results in a smaller amount of steam flowing upward than that in the lower area, causing the temperature of the ingredients in the upper steaming grid to be lower than that of the ingredients in the lower steaming grid, and thus the problem of uneven doneness of the upper and lower layers of ingredients occurs. At the same time, when cooking a large amount of ingredients, the ingredients are likely to block the ventilation holes at the bottom of the steaming grid, hindering the upward flow of steam, resulting in an even smaller amount of steam in the upper area than in the lower area. Moreover, since condensation occurs when high-temperature steam contacts low-temperature ingredients, the heat contained in the steam is always consumed during the upward flow, resulting in a lower temperature of the steam reaching the upper steaming grid than when it is in the lower steaming grid, and thus less heat is transferred to the upper ingredients than to the lower ingredients. Therefore, during cooking, the upper ingredients are often undercooked while the lower ingredients are overcooked. In addition, due to the heat consumption of the steam during the flow, the steam temperature at the top of the same layer of ingredients is lower than that at the bottom, resulting in uneven doneness of the same layer of ingredients as well.

[0051] In view of this, an embodiment of the present application provides a cooking appliance, which improves the uniformity of steam distribution in each layer of the steaming grid, alleviates the problems of uneven doneness of the same layer of ingredients and uneven doneness of different layers of ingredients, and thus improves the cooking effect of the ingredients.

[0052] Please refer to Figures 1 to 4 , for example, the cooking appliance includes a base 10 and at least two stacked steaming grids 20 provided on the base 10. Each steaming grid 20 corresponds to a steaming space 2001 for cooking ingredients, and an air port 2002 is provided on the side of the steaming grid 20, and the air port 2002 is communicated with the steaming space 2001. The cooking appliance further includes a steam supply structure 40 installed on the base 10, and the steam supply structure 40 is used to supply steam to the steaming spaces 2001 of the respective steaming grids 20 to achieve ingredient steaming.

[0053] Specifically, the steam supply structure 40 includes a steam generation assembly 41 and a plurality of steam delivery assemblies 42. The steam generation assembly 41 is provided with a steam generation chamber 4101. The number of the steam delivery assemblies 42 is not less than the number of the steaming grids 20. Each of the steam delivery assemblies 42 includes a delivery channel 421 having an air inlet and an air outlet, and a plugging assembly 422 disposed at the air outlet of the delivery channel 421. The air inlets of the delivery channels 421 are all communicated with the steam generation chamber 4101, and the air outlets of the delivery channels 421 are correspondingly arranged with the air ports 2002 of the steaming grids 20. When the steaming grid 20 corresponding to the delivery channel 421 is not placed, the plugging assembly 422 is in a closed state; when the steaming grid 20 corresponding to the delivery channel 421 is placed, the plugging assembly 422 is in an open state.

[0054] Figure 4 The arrow in Figure 4 indicates the steam flow direction. That is to say, when the steaming grid 20 is placed on the base 10 for cooking, the plugging assembly 422 at the air outlet of the delivery channel 421 corresponding to the steaming grid 20 is opened, so that the air port 2002 of the steaming grid 20 is communicated with the air outlet of the corresponding delivery channel 421. In this way, the steam generated in the steam generation chamber 4101 can be delivered to the delivery channel 421, and then delivered to the steaming space 2001 of the corresponding steaming grid 20 through the delivery channel 421 to meet the steaming of the ingredients in each steaming grid 20. Such a setting is equivalent to supplying steam from the side of the steaming grid 20 to ensure the heating temperature of the side of the ingredients; moreover, such a setting causes the ingredients not to be located on the transmission path of the steam transmitted layer by layer from bottom to top, so that it will not interfere with the transmission of the steam, effectively ensuring the temperature uniformity of the ingredients on each steaming grid 20. Moreover, since the number of the steam delivery assemblies 42 is not less than (i.e., equal to or greater than) the number of the steaming grids 20, it fully ensures that each steaming grid 20 corresponds to a delivery channel 421 and a plugging assembly 422, ensuring that each steaming grid 20 is supplied with steam separately, thereby reducing the heat loss when the steam is transmitted layer by layer from bottom to top, improving the uniformity of the steam distribution in the corresponding steaming space 2001 of each steaming grid 20, and further improving the temperature uniformity. In this process, precisely due to the setting of the plugging assembly 422, the corresponding delivery channel 421 can be plugged when each steaming grid 20 is not in use, and the corresponding delivery channel 421 can be opened when the steaming grid 20 is in use. That is to say, the setting of the plugging assembly 422 is conducive to adjusting the opening and closing state of the corresponding delivery channel 421 according to the use state of the steaming grid 20, reducing the amount of steam flowing out to the external environment through the delivery channel 421, not only effectively ensuring the amount of steam in the corresponding steaming grid 20 during steaming, but also reducing the risk of steam scald. In addition, the plugging assembly 422 can also block dust, impurities, etc. from entering the delivery channel 421.

[0055] Among them, at least two steaming grids 20 are arranged in a stacked manner, and correspondingly, at least two steam delivery components 42 are also provided and arranged at intervals in the vertical direction. When the number of steam delivery components 42 is greater than the number of steaming grids 20, the redundant steam delivery components 42 can be used for additional steaming structures or for adjusting the pressure in the steam generation chamber 4101 to maintain a safe state.

[0056] As Figure 1 and Figure 2 shown, in some specific embodiments, the steam supply structure further has a communication channel 43. One end of the communication channel 43 is communicated with the steam generation chamber 4101, and a plurality of delivery channels 421 are respectively communicated with the communication channel 43 and arranged at intervals. That is to say, the steam generated in the steam generation chamber 4101 is transferred to the communication channel 43, and then is shunted to each delivery channel 421 through the communication channel 43 to meet the steam supply in the steaming space 2001 corresponding to each steaming grid 20. Among them, each delivery channel 421 can be arranged at an angle with the communication channel 43 and protrude from the outer peripheral side of the communication channel 43. As long as it can meet the distribution of the steam in the steam generation chamber 4101 to the steaming space 2001 of each steaming grid 20.

[0057] Among them, the cross-sections of the communication channel 43 and each delivery channel 421 can be circular, elliptical, etc., to ensure that the channel walls are smooth and reduce the resistance to steam flow. Of course, each cross-section can also be square, rectangular, etc., as long as it is conducive to steam delivery. The cross-section of the communication channel 43 is smaller than the cross-sections of each delivery channel 421. In this way, the steam can accelerate and pressurize in the communication channel 43, and then slow down the flow rate in each delivery channel 421 to reduce the ejection pressure, so as to ensure that the steam can flow smoothly in the corresponding steaming space 2001 as much as possible and evenly fill the steaming space 2001. For another example, the cross-sectional diameter of the communication channel 43 can show an increasing trend along the steam delivery direction. Specifically, the communication channel 43 includes a small-diameter section and a large-diameter section connected to the small-diameter section. Each delivery channel 421 is connected to the large-diameter section, and one end of the small-diameter section away from the large-diameter section is communicated with the steam generation chamber 4101. The steam accelerates and pressurizes in the small-diameter section, and then decelerates and depressurizes in the large-diameter section. The pipe diameter of the large-diameter section can be basically the same as the pipe diameter of the delivery channel 421.

[0058] Please combine Figures 1 to 8, Optionally, the blocking assembly 422 includes a blocking body 4221. A blocking body 4221 is movably provided at the air outlet of each conveying channel 421, facilitating the movement of the blocking body 4221 to open and close the corresponding conveying channel 421. For example, the blocking body 4221 can be inserted into the conveying channel 421, such as a rubber plug. When it needs to be opened, it can be manually removed, and the air port of the steaming grid 20 is communicated with the conveying channel 421; conversely, when it is used or not used, the blocking body 4221 can be inserted into the conveying channel 421. Alternatively, the blocking body 4221 is connected to the conveying channel 421 by means of a threaded fit, and is rotated to open and rotated to close. The blocking body 4221 can also be provided with a handle for easy operation; moreover, the blocking body 4221 is usually made of a material resistant to high temperature and corrosion to meet the usage requirements of the cooking appliance in a high-temperature steam environment.

[0059] As Figures 3 to 8 shown, further, a seal 44 is provided at the air outlet of the conveying channel 421. The blocking body 4221 can cooperate with the seal 44 for sealing, improving the sealing performance at the air outlet of the conveying channel 421, ensuring good sealing of the conveying channel 421 when the steaming grid 20 is not placed, and reducing air leakage. Alternatively, the blocking body 4221 can also be provided with a seal 44. When the blocking body 4221 blocks, the seal 44 is pressed against the blocking body 4221 and the air outlet of the conveying channel 421 to ensure the sealing performance.

[0060] Please continue to refer to Figures 1 to 8 , Exemplarily, a trigger structure 50 is provided on the side of the steaming grid 20. When the steaming grid 20 corresponding to the conveying channel 421 is placed, the blocking body 4221 is opened by the trigger structure 50. That is to say, the trigger structure 50 can, according to the usage state of the steaming grid 20, cooperate with each blocking body 4221 to drive the blocking body 4221 to move to open the corresponding conveying channel 421 when the steaming grid 20 is placed, making the operation more convenient.

[0061] In actual use, each steaming grid 20 is correspondingly provided with a trigger structure 50. The trigger structure 50 includes a top contact protrusion 51 protruding from the side wall of the corresponding steaming grid 20, and the top contact protrusion 51 is provided with an air port 2002 communicating with the steaming space 2001. When the steaming grid 20 corresponding to the conveying channel 421 is placed, the top contact protrusion 51 can top contact the corresponding blocking body 4221 to move towards the inside of the conveying channel 421, so as to release the blockage of the air outlet of the conveying channel 421, and the air port 2002 communicates the corresponding conveying channel 421 and the corresponding steaming space 2001 to realize steam delivery. Moreover, the setting of the top contact protrusion 51 can increase the distance between the steaming grid 20 and the steam delivery assembly 42, avoiding problems such as wear and abrasion caused by direct contact between the two.

[0062] Among them, the protruding end of the top contact protrusion 51 protruding relative to the steaming grid 20 can be arranged as a tapered surface that gradually shrinks, which is beneficial for inserting into the corresponding conveying channel 421. At this time, the seal 44 is arranged at the air outlet of the conveying channel 421. The seal 44 is provided with a through-flow hole 4401, which is beneficial for steam to flow through. The hole wall of the through-flow hole 4401 is provided with a first sealing portion and a second sealing portion, and the two are arranged at intervals along the axial direction of the through-flow hole 4401. When the steaming grid 20 is not placed, the plugging body 4221 is pressed against the first sealing portion to ensure the sealing performance at the air outlet of the conveying channel 421. When the steaming grid 20 is placed, the top contact protrusion 51 abuts against the second sealing portion to improve the sealing performance at the joint of the air port 2002 of the conveying channel 421 and the steaming grid 20. Among them, the second sealing portion can also be arranged as a tapered surface to ensure the sealing area with the top contact protrusion 51.

[0063] Please refer to Figures 1 to 4 , further, the plugging body 4221 is configured as a gravity ball. The conveying channel 421 is provided with an inclined section 423 at its own outlet (i.e., the end away from the communication channel 43). The inclined section 423 is inclined downward and gradually shrinks from top to bottom. The gravity ball is accommodated in the inclined section 423. That is to say, when the steaming grid 20 is placed, the top contact protrusion 51 thereon can be inserted into the inclined section 423 to push the gravity ball away from the seal 44, realizing the opening of the plugging body 4221. When the steaming grid 20 is disassembled, the gravity ball loses the pushing effect of the top contact protrusion 51 and rolls downward under its own gravity to press against the seal 44 to achieve sealing. The structure is simple and the cost is relatively low. Among them, the inclined section 423 can be arc-shaped, which is beneficial for the gravity ball to roll.

[0064] Among them, the inclined section 423 is provided with a limiting protrusion 4231 to limit the movement of the gravity ball toward the side away from the seal 44. Among them, there are multiple limiting protrusions 4231 and they are arranged at intervals along the circumferential direction of the inclined section 423 to reserve a gap for steam to flow through.

[0065] Please combine Figure 1 , Figure 2 , Figure 5 and Figure 6Optionally, the blocking assembly 422 further includes a first elastic member 4222, which is used to apply a force to the blocking body 4221 toward the air outlet of the delivery channel 421. For example, a pressure plate 425 may be provided in the delivery channel 421, and a gap may be provided between the pressure plate 425 and the delivery channel 421 for steam circulation. The first elastic member 4222 is pre-pressed between the pressure plate 425 and the blocking body 4221 so that the blocking body 4221 is pressed against the sealing member 44. The top contact protrusion 51 on the steaming grid 20 may pass through the flow hole 4401 of the sealing member 44 to push the blocking body 4221 toward the side close to the pressure plate 425 to open the blocking body 4221; at this time, the first elastic member 4222 is compressed. When the steaming grid 20 is disassembled, the blocking body 4221 moves in the opposite direction under the action of the first elastic member 4222 to press against the sealing member 44 for blocking. Among them, the blocking body 4221 can be spherical, hemispherical or plate-shaped, etc.

[0066] Please combine Figure 1 , Figure 7 , Figure 8 and Figure 9 In some other embodiments, a channel wall is provided at the air outlet end of the conveying channel 421, and an air outlet is provided on the channel wall. The blocking assembly 422 further includes a connecting rod 4223, a second elastic member 4225 and a sensing member 4224. The connecting rod 4223 is hinged to the channel wall of the corresponding conveying channel 421. The blocking body 4221 and the sensing member 4224 are respectively arranged at both ends of the connecting rod 4223. The second elastic member 4225 is connected between the sensing member 4224 and the channel wall of the corresponding conveying channel 421. The trigger structure 50 further includes a trigger member 52 protruding from the outer wall of the steaming tray 20. The trigger member 52 is arranged corresponding to the sensing member 4224. When the steaming tray 20 is placed, the sensing member 4224 is configured to drive the blocking body 4221 away from the sealing member 44 through the connecting rod 4223 in response to the driving of the trigger member 52 to release the blockage. That is to say, the opening of the blocking body 4221 can be realized by the cooperation of the trigger member 52 and the sensing member 4224, and the top contact protrusion 51 does not need to be inserted into the conveying channel 421, which reduces the length of the top contact protrusion 51 and reduces the storage interference. At this time, the sealing member 44 can protrude from the conveying channel 421, which is conducive to the cooperation with the top contact protrusion 51 and further reduces the length of the top contact protrusion 51. The second elastic member 4225 is used to apply a force to the sensing member 4224 to move in the reverse direction (i.e., move toward the side away from the trigger member 52), which is conducive to the sensing member 4224 to restore the initial state after the steaming rack 20 is disassembled, so as to facilitate secondary use.

[0067] For example, the sensing member 4224 and the trigger member 52 are magnetically attracted, that is, the two can be two magnets, which are magnetically attracted by the way of opposite charges attracting each other. When the steam tray 20 is close to the steam delivery component 42, the sensing member 4224 can be triggered to move. The steam delivery component 42 is made of a material that does not have magnetic shielding. Alternatively, one of the sensing member 4224 and the trigger member 52 is a magnetic body, and the other is an electromagnet.

[0068] Among them, a hinge seat 4226 is convexly provided on the channel wall, which is conducive to the hinge connection of the middle part of the connecting rod 4223.

[0069] Alternatively, the sensing member 4224 and the trigger member 52 may also be arranged in a manner of matching with an inclined surface. For example, the sensing member 4224 partially protrudes from the conveying channel 421 and is provided with a wedge-shaped block on the protruding portion. The portion of the sensing member 4224 located in the conveying channel 421 is connected to the blocking body 4221 via a connecting rod 4223, and the connecting rod 4223 is slidably connected to the channel wall of the conveying channel 421. The trigger member 52 is arranged with an inclined surface on the side facing away from the steaming tray 20, which matches with the wedge-shaped block. When the steaming tray 20 is placed on the base 10, the inclined surface is used to push the sensing member 4224 to move, and the blocking body 4221 is driven to move via the connecting rod 4223 to release the blockage.

[0070] See also Figure 1 , Figure 2 , Figure 9 and Figure 10 In actual use, the steaming grid 20 is stacked on the steam generating chamber 4101, and the bottom wall of the steaming grid 20 is provided with air holes 22. A juice receiving tray 70 is also provided between the steam generating chamber 4101 and the steaming grid 20, and the juice receiving tray 70 is provided with a steam outlet 101 connecting the steam generating chamber 4101 and the bottom steaming grid 20. The juice receiving tray 70 collects the juice dripping from the steaming grid 20. The steam outlet 101 facilitates the steam in the bottom steam generating chamber 4101 to pass through, so as to flow upward from the bottom of the steaming grid 20 and heat the food on the steaming grid 20. Among them, the bottom wall of each steaming grid 20 is provided with a plurality of spaced placement protrusions 21 and a plurality of spaced air holes 22, and each air hole 22 and each placement protrusion 21 are arranged in a staggered manner. The provision of the placement protrusion 21 raises the food relative to the bottom wall of the steaming grid 20.

[0071] That is to say, the cooking appliance provided in this embodiment combines bottom steam heating and side steam heating, and through multi-directional steam delivery, the steam distribution uniformity in each steaming space 2001 is improved. Among them, taking the number of delivery channels 421 as two as an example. The steam generated in the steam generation chamber 4101 passes through the steam outlet 101 on the base 10, flows upward, and successively passes through the two upper steaming trays 20 to act on the food materials on each steaming tray 20; at the same time, part of the steam flows to the communication channel 43, and then is split into each delivery channel 421 along the communication channel 43, and then is delivered from the side of the corresponding steaming tray 20 to the corresponding steaming space 2001. In this way, it can be ensured that each steaming space 2001 has sufficient and evenly distributed steam, and the doneness of the food materials on each layer is basically the same.

[0072] Alternatively, it may also be that the steam generation assembly 41 is provided with a steam outlet 101 communicating the steam generation chamber 4101 with the bottommost steaming tray 20, for example, in an electric steam box. As long as it can meet the requirement of delivering steam from both the bottom and the side of the steaming tray 20.

[0073] In some embodiments, a micro-pressure valve is provided at the steam outlet 101 for maintaining the flow pressure at the steam outlet 101. For example, the flow pressure provided by the micro-pressure valve at the steam outlet 101 is between 0.1 kPa and 4 kPa. It can be understood that the flow pressure at the steam outlet 101 should not be too large or too small. If the flow pressure here is too large, more steam will flow to the steam delivery assembly 42, thus affecting the amount of steam transferred from the bottom of the steaming tray 20; and, due to the limitation of the cross-section of each channel in the steam delivery assembly 42, the pressure in the steam generation chamber 4101 may be too large, posing a safety hazard. On the contrary, if the flow pressure is too small, the amount of steam distributed to the steam delivery assembly 42 will be too small, and the uniform distribution of steam cannot be guaranteed.

[0074] Furthermore, the flow pressure provided by the micro-pressure valve at the steam outlet 101 can be between 0.5 kPa and 1.5 kPa, for example, it can be 0.5 kPa, 0.8 kPa, 1 kPa, 1.2 kPa or 1.5 kPa.

[0075] Please refer to Figure 1 、 Figure 9 and Figure 10, alternatively, the steam outlet 101 includes at least one small hole or capillary small hole. At this time, by designing the aperture of the small hole 1011, the flow pressure at the steam outlet 101 can be ensured to meet the requirements. For example, the smaller the aperture of the small hole 1011, the greater the corresponding flow pressure; conversely, the larger the aperture of the small hole 1011, the smaller the corresponding flow pressure. In some embodiments, the steam outlet 101 includes a plurality of small holes 1011 arranged at intervals, and the plurality of small holes 1011 are arranged in a scattered manner, with the aperture decreasing layer by layer from the inside to the outside. Alternatively, the plurality of small holes 1011 are arranged in a circular ring shape, and can be arranged at intervals from the inside to the outside and from small to large according to the diameter of the circular ring. The aperture of each small hole 1011 corresponding to the inner circular ring is smaller than the aperture of each small hole 1011 corresponding to the outer circular ring. At this time, the steam pressure in the steam generation chamber 4101 can be maintained at 4 kPa, and further between 0.5 kPa and 1.5 kPa.

[0076] In some specific embodiments, the diameters of the communication channel 43 and the delivery channel 421 are between 2 mm and 50 mm. It can be understood that the diameters of the communication channel 43 and the delivery channel 421 should not be too large or too small. If the diameter is too large, resulting in too large a flow cross-section, it is equivalent to a decrease in the flow pressure of the steam along the communication channel 43 and the delivery channel 421, causing more steam to flow into the communication channel 43, thereby reducing the amount of steam flowing from the bottom of the steaming grid 20 through the steam outlet 101. Conversely, if the diameter is too small, resulting in too small a flow cross-section, it is equivalent to an increase in the flow pressure of the steam along the communication channel 43 and the delivery channel 421, which is not conducive to more steam flowing into the communication channel 43 and the delivery channel 421, causing more steam to be used for heating from the bottom of the steaming grid 20, and is also not conducive to the uniform distribution of steam. For example, the diameter can be 2 mm, 10 mm, 25 mm, 30 mm, 42 mm or 50 mm.

[0077] Furthermore, taking the communication channel 43 and the delivery channel 421 together as the steam delivery pipeline of the steam delivery assembly 42, the diameter of the steam delivery pipeline is between 3 mm and 20 mm. For example, it can be 3 mm, 8 mm, 10 mm, 12 mm, 15 mm, 18 mm or 20 mm.

[0078] Optionally, the flow pressure at each delivery channel 421 increases from top to bottom. That is to say, the flow pressure at the delivery channel 421 located higher in the vertical direction is less than that at the delivery channel 421 located lower. Such a setting can prompt some of the steam flowing towards the steam delivery assembly 42 to preferentially flow from the upper steaming grid 20 to ensure that the upper-layer food ingredients receive sufficient heat. Specifically, the opening degree of the corresponding blocking assembly 422 at each delivery channel 421 decreases from top to bottom, that is, the opening degree at the upper part is greater than that at the lower part. Taking the top contact protrusion 51 pushing to open the blocking body 4221 as an example, it can be that the protruding length of the top contact protrusion 51 is different, which leads to different pushing displacements on the blocking body 4221 to achieve the adjustment of the opening degree. When the magnetic adsorption is used to open the blocking body 4221, it can be to adjust the damping of the corresponding second elastic member 4225 to achieve different opening degree adjustments. Only examples are given here.

[0079] It can be understood that because the steam in the related art mostly flows from bottom to top, the heat absorbed by the upper-layer food ingredients is less than that of the lower-layer food ingredients. Therefore, in this embodiment, the opening degree settings of the corresponding blocking assemblies 422 for each delivery channel 421 can be used to meet different flow resistance requirements, so that the steam preferentially transfers to the upper-layer food ingredients and then flows to the middle and lower-layer food ingredients; and, by using the setting of the steam outlet 101, some steam can still flow from bottom to top. In this way, it is fully ensured that the steam can flow in different directions to improve the uniformity of food ingredient heating and reduce the risk of local overheating or undercooking; and, such a setting fully improves the cooking efficiency and thus shortens the cooking time.

[0080] Furthermore, the flow pressure at the steam outlet 101 is basically the same as the flow pressure at one of the delivery channels 421 at the highest position among the multiple delivery channels 421. Such a setting can ensure that the flow pressures at the upper and lower positions are basically the same, which is more conducive to the uniform diffusion of steam.

[0081] Such as Figure 1As shown, in some specific embodiments, the number of steaming grids 20 is two, namely a first steaming grid 201 and a second steaming grid 202, corresponding to a first conveying channel and a second conveying channel respectively. Among them, the first steaming grid 201 is located above the second steaming grid 202. The flow pressure at the first conveying channel is basically the same as the flow pressure at the steam outlet 101, and both are less than the flow pressure at the second conveying channel. Since the steaming grid 20 is arranged above the steam generating chamber 4101, the juice receiving tray 70 is arranged above the steam generating chamber 4101. The flow path of the steam flowing from the steam generating chamber 4101 to the steam outlet 101 is shorter than the flow path of the steam flowing from the steam generating chamber 4101 to the first conveying channel. Therefore, the amount of steam at the steam outlet 101 is greater than the amount of steam flowing to the first conveying channel. And, since the flow pressure at the second conveying channel is greater than the flow pressure at the first conveying channel, the amount of steam at the first conveying channel is greater than the amount of steam at the second conveying channel.

[0082] Alternatively, the flow pressures at each conveying channel 421 can be the same and the same as the flow pressure at the steam outlet 101.

[0083] As Figure 1 and Figure 11 As shown, optionally, the steam outlet 101 includes a first steam outlet 101a and a second steam outlet 101b, which are arranged at intervals and have different flow cross-sections. The cooking appliance further includes an adjusting assembly 60 to adjust the selective opening of the first steam outlet 101a and the second steam outlet 101b, thereby causing different flow pressures at the base 10. Among them, the adjusting assembly 60 includes a control lever 61 and a shielding member 62 connected to the control lever 61. The control lever 61 can drive the shielding member 62 to selectively block the first steam outlet 101a and the second steam outlet 101b. For example, the flow cross-section of the first steam outlet 101a can be larger than that of the second steam outlet 101b, then the flow pressure at the first steam outlet 101a is less than the flow pressure at the second steam outlet 101b. The control lever 61 is convenient for user operation. The shielding member 62 can be a sheet-like structure and is pressed against the side of the juice receiving tray 70 away from the steaming grid 20. The control lever 61 and the shielding member 62 are connected by a connecting rod, thereby realizing the position control of the shielding member 62.

[0084] Among them, the middle of the connecting rod can be hinged to the bottom of the juice receiving tray 70, and the control lever 61 and the shielding member 62 are respectively arranged at both ends of the connecting rod. Of course, it can also be the cooperation of a connecting rod mechanism, as long as it can drive the shielding member 62 to move by the movement of the control lever 61 to realize the position adjustment relative to the first steam outlet 101a and the second steam outlet 101b.

[0085] Please refer to Figure 1 and Figure 9, in some embodiments, the steam generating assembly 41 includes a water tank 411 and a heater 412 disposed at the bottom of the water tank 411. The water tank 411 is disposed on the base 10 and encloses a steam generating chamber 4101. For example, the water tank 411 is integrally formed with the base 10. Water is added to the water tank 411 and heated by the heater 412 to reach the boiling state to generate steam. The generated steam flows to the steam delivery assembly 42 and is then delivered from the sides of each steaming grid 20 to the corresponding steaming space 2001. When the steam generating chamber 4101 is located below the steaming grid 20, the height of the connection of the communication channel 43 with the water tank 411 is higher than the highest water level line of the water tank 411, so as to ensure that only steam flows to the communication channel 43 as much as possible, and reduce the water flowing directly into the steam delivery assembly 42 or the water flowing into the steam delivery assembly 42 after boiling.

[0086] Please refer to Figure 9 , as another example, the steam generating assembly 41 further includes a water tank 411 and a first partition plate 413 disposed in the water tank 411. The first partition plate 413 divides the cavity of the water tank 411 into a steam generating chamber 4101 and a water replenishing chamber 4102 surrounding the outer peripheral side of the steam generating chamber 4101. That is, the first partition plate 413 is annularly arranged, and the water replenishing chamber 4102 is annularly arranged. The first partition plate 413 is provided with a communication port 4130 to communicate the water replenishing chamber 4102 and the steam generating chamber 4101. The communication port 4130 can be annularly arranged to surround the steam generating chamber 4101; or, the communication port 4130 can be provided with a plurality of them and arranged at intervals along the circumference of the steam generating chamber 4101. As long as it can satisfy the water in the water replenishing chamber 4102 flowing into the steam generating chamber 4101. The water replenishing chamber 4102 is used to supply water to the steam generating chamber 4101. A heater 412 is disposed at the bottom of the water tank 411 to heat the water in the steam generating chamber 4101.

[0087] Wherein, a part of the communication channel 43 penetrates through the water replenishing chamber 4102 and is located above the highest water level line in the water replenishing chamber 4102, and the communication channel 43 is not communicated with the water replenishing chamber 4102.

[0088] Please refer to Figure 9 , for example, a resistance valve 414 for controlling the on-off of the steam outlet 101 is disposed below the steam outlet 101. Specifically, the resistance valve 414 is disposed at the orifice of the steam generating chamber 4101 and is close to the steam outlet 101. When the steam content in the steam generating chamber 4101 reaches a certain amount and the pressure increases to a certain value, the steam can overcome the resistance of the resistance valve 414, and the resistance valve 414 is opened, and the steam outlet 101 is communicated with the steam generating chamber 4101 to discharge the steam from the steam generating chamber 4101 for steaming and heating the food materials. If the pressure in the steam generating chamber 4101 is not enough to open the resistance valve 414, the steam outlet 101 is not communicated with the steam generating chamber 4101.

[0089] It is understandable that precisely due to the setting of the resistance valve 414, it can promote the maintenance of a certain micro-pressure state in the steam generation chamber 4101, keeping the water level height in the steam generation chamber 4101 less than that in the water replenishing chamber, which is conducive to the faster heating and evaporation of the water in the steam generation chamber 4101 and improves the heating efficiency. Moreover, by utilizing the micro-pressure state of the resistance valve 414, the water replenishing amount flowing into the steam generation chamber 4101 via the water replenishing chamber 4102 can be controlled to be as much as possible within the range adapted to the cross-sectional area of the flow port. In addition, since the first partition plate 413 separates the steam generation chamber 4101 and the water replenishing chamber 4102, it is equivalent to separating hot water and cold water, reducing the convective heat transfer between hot and cold water, and further improving the heating efficiency of the water in the steam generation chamber 4101. Among them, the flow port 4130 is located on the side of the first partition plate 413 close to the bottom wall of the water tank 411.

[0090] Please combine Figure 9 、 Figure 12 and Figure 13 , optionally, the resistance valve 414 includes a second partition plate 4141 and a pressure member 4142. The second partition plate 4141 is connected to the chamber wall of the steam generation chamber 4101, for example, connected to the first partition plate 413. The second partition plate 4141 is provided with an air outlet hole 4140, and the pressure member 4142 is movably arranged at the air outlet hole 4140 and can be opened and closed under the action of the pressure in the steam generation chamber 4101. For example, the second partition plate 4141 is provided with a tapered concave cavity 4143 from top to bottom at the air outlet hole 4140, and at least part of the pressure member 4142 is accommodated in the concave cavity 4143 and pressed against the cavity wall of the concave cavity 4143 to achieve sealing. When the pressure in the steam generation chamber 4101 is greater than the opening pressure of the resistance valve 414, the steam pushes the pressure member 4142 upward to release the seal, and the steam flows through the air outlet hole 4140. The tapered concave cavity 4143 is conducive to the pressure member 4142 actively restoring to the sealing position after being lifted, that is, playing a role in guiding the movement and limiting the position of the pressure member 4142.

[0091] Among them, a mesh structure is provided at the air outlet hole 4140, and the mesh structure and the second partition plate 4141 can be integrally formed. The pressure member 4142 can also be a gravity ball. When the pressure in the steam generation chamber 4101 is less than the opening pressure of the resistance valve 414, the pressure member 4142 is pressed against the cavity wall of the concave cavity 4143 under its own gravity. Of course, the pressure member 4142 can also be a plate-like structure, or the pressure member 4142 can be rotatably connected to the cavity wall of the concave cavity 4143. As long as it can meet the movability of the pressure member 4142, only examples are given here.

[0092] Among them, Figure 13 the direction indicated by the arrow in

[0093] Please refer to Figure 9 and Figure 14 , in some embodiments, the steam generation chamber 4101 can also be divided into upper and lower sub-chambers by a resistance valve 414, namely an upper sub-chamber and a lower sub-chamber. The lower sub-chamber is used to generate steam. The communication channel 43 in the steam delivery assembly 42 communicates with the lower sub-chamber, and the communication position is located near the resistance valve 414. Alternatively, when the communication channel 43 communicates with the upper sub-chamber, the steam in the lower sub-chamber flows into the upper sub-chamber after overcoming the opening pressure of the resistance valve 414. Part of the steam flows through the steam outlet 101 to the bottom of the steaming grid 20 and flows upward from bottom to top, and the other part flows along the communication channel 43 to each delivery channel 421, and then flows to the corresponding steaming grid 20.

[0094] Please refer to Figure 9 , in another alternative embodiment, based on the water tank 411 being provided with a water replenishment chamber 4102, the projection range of the heater 412 in the vertical direction is greater than the projection range of the steam generation chamber 4101 in the vertical direction. Such a setting enables a part of the edge of the heater 412 to be located at the bottom of the water replenishment chamber 4102, so as to heat the part of the water replenishment chamber 4102 close to the steam generation chamber 4101, further reducing the cold influence of the cold water in the water replenishment chamber 4102 on the steam generation chamber 4101; moreover, such a setting has a preheating effect on the water in the water replenishment chamber 4102, further improving the heating efficiency of the water flowing into the steam generation chamber 4101.

[0095] Please refer to Figure 14 , as another example, both the steam generation assembly 41 and the steam delivery assembly 42 are provided on the side of the base 10. The communication channel 43 is connected to the top of the steam generation chamber 4101, thereby reducing the length of the communication channel 43. That is to say, such a setting can reduce the path between the steam generation chamber 4101 and the steam delivery assembly 42 on the basis of ensuring uniform steam distribution in each steaming space 2001, facilitating the faster delivery of steam to the corresponding steaming spaces 2001 of each steaming grid 20, reducing the heat loss of steam during the delivery process, and thus improving the cooking efficiency.

[0096] It can be understood that in the related art, a juice receiving tray is usually arranged below the steaming grid, and a plurality of openings are provided on the juice receiving tray for steam to flow through the juice receiving tray and act on the steaming grid, thereby heating the food materials. However, in order to ensure that the steam generating chamber is in a slightly pressurized state, the aperture of the holes on the juice receiving tray is usually set to be small; moreover, during the cooking process, the food materials will exude juice and even drop some small pieces of scraps, resulting in the blockage of the holes on the juice receiving tray. Therefore, during the cooking process, the flow cross-section for steam circulation may become smaller, which not only affects the steam output, but also easily causes the pressure in the steam generating chamber to be too high, posing a safety hazard. For example, a large amount of steam is forced to spray out from the edge of the juice receiving tray, which is likely to scald the user; or, the steam generating chamber is transformed into a pressure vessel and the juice receiving tray and even the steaming grid on it are lifted up, etc. In addition, the scraps falling into the holes are more difficult to clean, and over time, the flow cross-section becomes smaller and smaller.

[0097] Therefore, in this embodiment, the entire steam supply structure is arranged on the side of the base 10, which is equivalent to arranging the entire steam supply structure on the outer peripheral side of the steaming grid 20, so that steam is fully transported from the side of the steaming grid 20 to the corresponding steaming space 2001. With such an arrangement, there is no need to provide holes for steam to pass through on the juice receiving tray 70, and the steam only needs to flow along the communication channel 43 to each delivery channel 421, and then flow to each steaming grid 20 to achieve steaming of the food materials. During the cooking process, even if scraps fall, it will not affect the steam delivery volume; moreover, since each delivery channel 421 is used to deliver steam from the side of the steaming grid 20 and there is a certain distance from the food materials, it is less likely to be blocked, effectively ensuring the continuous delivery of steam, improving the cooking effect, and reducing the safety hazard. At the same time, with such an arrangement, the consumption of steam heat during the dripping process of the condensed water droplets and the consumption of steam heat after dripping onto the base 10 are reduced, further improving the effective utilization rate of steam. In addition, precisely because there is no need to provide a hole structure on the base 10, it is not only beneficial to the cleaning of the base 10, but also reduces the juice dripping into the steam generating chamber 4101 through the holes on the base 10.

[0098] As Figure 1 shown, during actual use, a support 11 protrudes from the base 10 to support the juice receiving tray 70, and each steaming grid 20 is stacked layer by layer above the juice receiving tray 70. The support 11 can be a plurality of spaced legs, or two opposite and spaced support beams, as long as it can satisfy the support of the juice receiving tray 70 and the steaming grid 20.

[0099] In this embodiment, the steam generating assembly 41 also includes a water tank 411 and a first partition plate 413 disposed in the water tank 411, thereby dividing the cavity of the water tank 411 into a steam generating cavity 4101 and a water replenishing cavity 4102. A resistance valve 414 is provided at the orifice of the steam generating cavity 4101. When the communication channel 43 is communicated with the upper sub-cavity, the steam in the lower sub-cavity flows upward into the upper sub-cavity after overcoming the opening pressure of the resistance valve 414, flows along the communication channel 43 to each delivery channel 421, and then flows to the corresponding steaming grid 20.

[0100] Please refer to Figure 16 , in some embodiments, the steam supply structure 40 further includes an auxiliary heating element 45, and the auxiliary heating element 45 is disposed in the delivery channel 421 of the steam delivery assembly 42. By providing the auxiliary heating element 45, the steam in the delivery channel 421 can be further heated, the steam heat can be increased, and thus the heating efficiency of the food materials can be improved. For example, each delivery channel 421 is arranged in an L shape, an air outlet is provided at the end of the horizontal side of the L shape for cooperating with the steaming grid 20, the end of the vertical side is connected to the communication channel 43, and the auxiliary heating element 45 is provided on the vertical side.

[0101] As Figure 15 shown, alternatively, an auxiliary heating element 45 is provided at a portion of the communication channel 43 between the plurality of delivery channels 421 and the steam generating cavity 4101. With such a setting, through the setting of a single auxiliary heating element 45, the steam can be reheated before being branched via the communication channel 43, and the steam heat at each delivery channel 421 can be increased. For example, the plurality of delivery channels 421 are arranged at intervals in the vertical direction, and the communication channel 43 is divided into a plurality of heating sections, and each heating section is provided with an auxiliary heating element 45.

[0102] Or, auxiliary heating elements 45 are respectively provided corresponding to the communication channel 43 and each delivery channel 421. As long as the steam heat can be increased and the cooking efficiency can be improved, only examples are given here.

[0103] During actual use, the cooking appliance further includes a pot lid 30, and the pot lid 30 is covered on the steaming grid 20 for cooking. For example, the cooking appliance can be an electric steamer. Of course, the cooking appliance can also be an electric steamer.

[0104] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0105] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the appended claims.

Claims

1. A cooking appliance, characterized in that, It includes a base (10) and at least two steam trays (20) arranged in a stacked manner on the base (10). An air port (2002) is provided on the side of the steam tray (20). The base (10) is provided with a steam supply structure (40). The steam supply structure (40) includes a steam generation assembly (41) and a plurality of steam delivery assemblies (42). The steam generation assembly (41) is provided with a steam generation chamber (4101). The number of the steam delivery assemblies (42) is not less than the number of the steam trays (20). Each of the steam delivery assemblies (42) includes a delivery channel (421) having an air inlet and an air outlet, and a blocking assembly (422) provided at the air outlet of the delivery channel (421). The air inlet of the delivery channel (421) is communicated with the steam generation chamber (4101), and the air outlet is correspondingly arranged with the air port (2002) of the steam tray (20). When the steam tray (20) corresponding to the delivery channel (421) is not placed, the blocking assembly (422) is in a closed state. When the steam tray (20) corresponding to the delivery channel (421) is placed, the blocking assembly (422) is in an open state.

2. The cooking appliance according to claim 1, wherein, The blocking assembly (422) includes a blocking body (4221). A blocking body (4221) is movably provided at the air outlet of each delivery channel (421).

3. The cooking appliance according to claim 2, characterized in that, A seal (44) is provided on the air outlet of the delivery channel (421) or the blocking body (4221).

4. The cooking appliance according to claim 2, characterized in that, A triggering structure (50) is provided on the side of the steam tray (20). When the steam tray (20) corresponding to the delivery channel (421) is placed, the blocking body (4221) is opened by the triggering structure (50).

5. The cooking appliance according to claim 4, wherein, The triggering structure (50) includes a top-touch projection (51) protruding from the side wall of the corresponding steam tray (20). The air port (2002) is provided on the top-touch projection (51).

6. The cooking appliance according to claim 4, characterized in that, Each delivery channel (421) is provided with an inclined section (423) at its own outlet. The inclined section (423) is inclined downward from top to bottom and is tapered. The blocking body (4221) is configured as a gravity ball, and the gravity ball is accommodated in the inclined section (423).

7. The cooking appliance according to claim 4, characterized in that, The blocking assembly (422) further includes a first elastic member (4222). The first elastic member (4222) is used to apply a force to the blocking body (4221) towards the air outlet of the delivery channel (421).

8. The cooking appliance according to claim 4, characterized in that, The air outlet end of the delivery channel (421) is provided with a channel wall, and an air outlet is formed on the channel wall; The blocking assembly (422) further includes a connecting rod (4223), a second elastic member (4225), and a sensing member (4224). The connecting rod (4223) is hinged to the channel wall. The blocking body (4221) and the sensing member (4224) are respectively arranged at two ends of the connecting rod (4223). The second elastic member (4225) abuts between the channel wall and the sensing member (4224); The trigger structure (50) further includes a trigger member (52) provided on the side wall of the steaming grid (20), and the trigger member (52) is arranged corresponding to the sensing member (4224).

9. The cooking appliance according to claim 8, wherein, The sensing member (4224) and the trigger member (52) are magnetically adsorbed.

10. The cooking appliance according to claim 1, characterized in that, The steaming grid (20) is stacked above the steam generating cavity (4101), and the bottom wall of the steaming grid (20) is provided with ventilation holes (22). A juice receiving tray (70) is further provided between the steam generating cavity (4101) and the steaming grid (20). The steam generating assembly (41) or the juice receiving tray (70) is provided with a steam outlet (101) communicating the steam generating cavity (4101) with the bottommost steaming grid (20).

11. The cooking appliance according to claim 10, wherein, A micro-pressure valve is provided at the steam outlet (101); or, The steam outlet (101) includes at least one small hole or capillary small hole, or, A resistance valve (414) for controlling the on-off of the steam outlet (101) is provided below the steam outlet (101).

12. The cooking appliance according to claim 11, characterized in that, The resistance valve (414) includes a second partition plate (4141) and a pressure member (4142). The second partition plate (4141) is connected to the cavity wall of the steam generating cavity (4101) and is provided with an air outlet hole (4140). The pressure member (4142) is movably arranged at the air outlet hole (4140), and the pressure member (4142) can be opened and closed under the action of the pressure in the steam generating cavity (4101).

13. The cooking appliance according to claim 10, wherein The steam outlet (101) includes a first steam outlet (101a) and a second steam outlet (101b), which are arranged at intervals and have different flow cross-sections; The cooking appliance further includes a control lever (61) and a shielding member (62) connected to the control lever (61). The control lever (61) can drive the shielding member (62) to selectively block one of the first steam outlet (101a) and the second steam outlet (101b).

14. The cooking appliance according to claim 1, wherein, The steam generating assembly (41) further includes a water tank (411) and a first partition plate (413) provided in the water tank (411). The first partition plate (413) divides the cavity of the water tank (411) into a steam generating cavity (4101) and a water replenishing cavity (4102). The water replenishing cavity (4102) surrounds the outer peripheral side of the steam generating cavity (4101). The first partition plate (413) is provided with a communication port (4130), and the communication port (4130) communicates the steam generating cavity (4101) and the water replenishing cavity (4102).

15. The cooking appliance according to claim 1, wherein, The steam supply structure (40) further includes a communication channel (43). One end of the communication channel (43) is communicated with the steam generating cavity (4101), and a plurality of the conveying channels (421) are all communicated with the communication channel (43); The communication channel (43) and / or the conveying channel (421) is provided with an auxiliary heating member (45).

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