Steam cooking appliance

Abstract

The application relates to the technical field of cooking electric appliances, and provides a steam cooking appliance, which comprises a water tank and a heating disc arranged on the water tank, the heating disc comprises a disc body, a first heating pipe and a second heating pipe, the first heating pipe and the second heating pipe are arranged on the lower surface of the disc body, the first heating pipe is located at the periphery of the second heating pipe, the upper surface of the disc body is provided with a heat conductor, the heat conductor is arranged in close contact with the upper surface of the disc body, the vertical projection of the heat conductor on the disc body is located in the inner peripheral area of the first heating pipe, the heat conductor corresponds to the second heating pipe in the up-down direction, the first heating pipe is used for heating water in the water tank to generate steam, the heat conductor has a heat-conducting convex part which protrudes upwards, and the second heating pipe is used for heating the generated steam in the water tank by using the heat transferred to the heat-conducting convex part. In this way, the heating pipe does not need to be arranged on the upper surface of the disc body, and the avoiding through hole for the wire is not needed to be arranged on the disc body, so that the structure is simple, the assembly process is simplified, and the production manufacturing cost is reduced.

Description

Technical Field

[0001] This application relates to the field of cooking appliance technology, and more particularly to a steam cooking appliance. Background Technology

[0002] With the popularization of healthy eating concepts and the improvement of living standards, steaming and boiling food has gradually become the mainstream cooking method in various families, and steam cooking appliances have gradually become an indispensable kitchen appliance in modern households.

[0003] To improve the heating efficiency and increase the steam temperature of steam cooking appliances, related technologies, such as the patent with publication number CN119257430A, disclose a high-temperature steam cooking appliance, including a water tank. The water tank contains a water-insulating cover and a first heating element. The water-insulating cover divides the water tank into an evaporation chamber located outside the cover and a superheating chamber located inside the cover. The first heating element heats the evaporation chamber to generate steam. The superheating chamber contains a second heating element and a heat-conducting cover. The second heating element protrudes from the heat-conducting cover and is used to heat both the steam and the heat-conducting cover. The heat-conducting cover is located between the water-insulating cover and the second heating element to divide the superheating chamber into an inlet channel and an outlet channel. The second heating element includes a heat transfer element and a heating element disposed inside the heat transfer element. The first heating element includes a heat-conducting plate and a heating tube for heating the heat-conducting plate. The water-insulating cover and the second heating element are disposed on the heat-conducting plate.

[0004] However, in order to heat the steam generated in the water tank, this type of steam cooking appliance requires a heating element to be installed inside the heat transfer element of the second heating element, and a clearance hole to allow wires to pass through and connect the heating element to electricity needs to be opened on the heat conduction plate of the first heating element. At the same time, in order to install the second heating element on the heat conduction plate, a positioning protrusion for supporting the second heating element also needs to be set on the heat conduction plate. This makes the structure of the first and second heating elements complex, the assembly process cumbersome, and the cost high. Utility Model Content

[0005] To address the issues of complex structures, cumbersome assembly processes, and high costs associated with the first and second heating elements of existing steam cooking appliances, this application provides a steam cooking appliance.

[0006] This application provides a steam cooking appliance, including a water tank and a heating plate disposed on the water tank. The heating plate includes a plate body, a first heating element and a second heating element. The first heating element and the second heating element are both disposed on the lower surface of the plate body, and the first heating element is located around the second heating element. A heat conductor is installed on the upper surface of the disc, and the heat conductor is attached to the upper surface of the disc. The vertical projection of the heat conductor on the disc is located in the inner area of ​​the first heating tube, and the heat conductor is vertically aligned with the second heating tube, so as to use the first heating tube to heat the water in the water tank to generate steam. The heat conductor has an upwardly protruding heat-conducting protrusion, so as to use the heat transferred from the second heating tube to the heat-conducting protrusion to heat the steam generated in the water tank.

[0007] In some embodiments, at least a portion of the second heating element is located below the heat-conducting protrusion.

[0008] In some embodiments, the heat conductor includes a bottom wall and a surrounding wall extending upward from the periphery of the bottom wall. The heat-conducting protrusion is located in the inner periphery of the surrounding wall and extends upward from the inner wall surface of the bottom wall. The bottom wall, the surrounding wall, and the heat-conducting protrusion together form a steam heating chamber.

[0009] In some embodiments, at least a portion of the second heating element is located below the steam heating chamber.

[0010] In some embodiments, the enclosure is a single-layer wall structure; Alternatively, the enclosure may be a double-wall structure, comprising an inner enclosure and an outer enclosure located outside the inner enclosure, with an air-insulated cavity formed between the inner enclosure and the outer enclosure.

[0011] In some embodiments, the water tank is provided with ribs, the heating plate is located at the bottom of the ribs, the heat conductor is located in the inner area of ​​the ribs, the ribs, the wall, and the area on the heating plate between the ribs and the wall together form a liquid heating chamber, at least a portion of the first heating tube is located below the liquid heating chamber, and the liquid heating chamber is connected to the steam heating chamber.

[0012] In some embodiments, the steam cooking appliance further includes a drip tray supported on the top of the surrounding rib. The drip tray has a downwardly protruding steam guide tube inserted into the steam heating chamber and dividing the steam heating chamber into a connected steam inlet channel and a steam outlet channel. A communicating gap is formed between the lower surface of the drip tray and the top of the surrounding wall, and the communicating gap connects the liquid heating chamber and the steam inlet channel.

[0013] In some embodiments, the upper surface of the disk is a plane, and the bottom surface of the heat conductor is fitted to the upper surface of the disk.

[0014] In some embodiments, the heat conductor is fixed to the disk body by fasteners, and the fasteners are installed and fixed to the disk body and the heat conductor from the side of the disk body facing away from the heat conductor.

[0015] In some embodiments, a sealing ring is provided between the bottom periphery of the heat conductor and the upper surface of the disk.

[0016] The technical solution provided in this application has at least the following advantages compared with the prior art: 1. The steam cooking appliance provided in this application has a first heating element and a second heating element installed on the lower surface of the heating plate, and a heat conductor installed on the upper surface of the plate. The heat conductor is attached to the upper surface of the plate, and the vertical projection of the heat conductor on the plate is located in the inner area of ​​the first heating element. In this way, the first heating element heats the water in the water tank located around the heat conductor to generate steam. The heat conductor and the second heating element are vertically aligned so that the heat generated by the second heating element can be transferred to the heat conductor. The heat conductor has an upwardly protruding heat-conducting protrusion, so that the heat transferred from the second heating element to the heat-conducting protrusion heats the steam generated in the water tank to form superheated steam, thereby improving the heating efficiency of the steam cooking appliance. The steam cooking appliance provided in this application uses a heat conduction method to heat a heat conductor installed on the upper surface of the plate by using a second heating element located on the lower surface of the plate. This eliminates the need to install a heating element on the upper surface of the plate, as well as to open a clearance hole on the plate for wires to pass through. It only requires ensuring that the heat conductor is in contact with the upper surface of the plate, and there is no need to set a positioning protrusion on the upper surface of the plate to support the heat conductor. This simplifies the structure of the heating plate and the heat conductor, simplifies the assembly process, and reduces manufacturing costs.

[0017] 2. By setting at least a portion of the second heating element to be located below the heat-conducting protrusion, the heat generated by the second heating element can be more effectively transferred to the heat-conducting protrusion located above the plate, thereby improving the heating efficiency of the steam generated in the water tank using the heat-conducting protrusion.

[0018] 3. By setting up a heat conductor including a bottom wall and a surrounding wall, and using the bottom wall, surrounding wall and heat-conducting protrusion of the heat conductor to form a steam heating chamber, the steam generated by heating water in the water tank enters the steam heating chamber, and the heat-conducting protrusion is used to reheat the steam in the steam heating chamber, raising the temperature of the steam and forming superheated steam, thereby improving the heating efficiency of the steam cooking appliance for food.

[0019] 4. By setting at least a portion of the second heating element below the steam heating chamber, the heat generated by the second heating element is used to heat the steam entering the steam heating chamber, thus preventing condensation due to low temperature in the steam heating chamber.

[0020] 5. By setting the enclosure of the heat conductor to a single-layer wall structure, the structure of the heat conductor is simplified and the manufacturing is convenient; by setting the enclosure of the heat conductor to a double-layer wall structure, and forming an air insulation cavity between the inner and outer walls, the heat transfer is blocked, reducing the impact of water heating on the inner high-temperature steam heating cavity, which is conducive to the rapid heating of steam in the steam heating cavity.

[0021] 6. By providing ribs inside the water tank, the ribs, the walls of the heat conductor, and the area on the heating plate located between the ribs and the walls together form a liquid heating chamber. This allows the first heating tube to heat the water in the liquid heating chamber, rather than heating the water in the entire water tank. This helps to increase the temperature rise rate of the water in the liquid heating chamber, thereby achieving the purpose of quickly generating steam.

[0022] 7. By supporting a drip tray on the top of the ribs of the water tank and providing a downwardly protruding steam guide tube on the drip tray, the steam heating chamber is divided into a connected steam inlet channel and a steam outlet channel by the steam guide tube. A connecting gap is formed between the lower surface of the drip tray and the top of the wall of the heat conductor. This allows the steam generated in the liquid heating chamber to enter the steam inlet channel through the connecting gap and then flow to the steam outlet channel. This allows the steam to come into contact with the heat-conducting protrusion of the heat conductor during the flow process, thereby achieving the purpose of secondary heating of the steam and avoiding the problem of steam flowing out without sufficient heat exchange with the heat conductor.

[0023] 8. By setting the upper surface of the heating plate to be flat and setting the bottom surface of the heat conductor to fit against the upper surface of the plate, a large contact area between the heat conductor and the plate is ensured, thereby improving the efficiency of the second heating tube in transferring heat to the heat conductor through the plate; and by setting the upper surface of the plate to be flat, the structure of the plate is simple, easy to process, and convenient for the heat conductor to be installed and fixed on the plate.

[0024] 9. The heat conductor is fixed to the plate by fasteners, and the fasteners are installed from the side of the plate away from the heat conductor to fix the plate and the heat conductor. This allows the fasteners to not penetrate the heat conductor, which helps to ensure the airtightness of the heat conductor and reduces the risk of water or steam in the water tank leaking to the bottom of the plate.

[0025] 10. By providing a sealing ring between the bottom periphery of the heat conductor and the upper surface of the plate, water or steam in the water tank is prevented from entering the bottom area of ​​the heat conductor, thus preventing water or steam from remaining between the bottom of the heat conductor and the plate of the heating plate. This effectively reduces the risk of water or steam leaking to the bottom of the plate after entering the bottom of the heat conductor. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a cross-sectional view of a steam cooking appliance provided in an embodiment of this application. Figure 2 for Figure 1 A schematic diagram of the assembly structure of the heating plate and heat conductor of the steam cooking appliance shown. Figure 3 for Figure 1 A schematic diagram of the steam flow direction of the steam cooking appliance shown. Figure 4 for Figure 1 A schematic diagram of the assembly structure of the heating plate, heat conductor and water tank of the steam cooking appliance shown. Figure 5 This is a cross-sectional view of a steam cooking appliance provided in another embodiment of this application.

[0029] Among them, 1. Water tank; 11. Reinforcing bars; 2. Heating plate; 21. Plate body; 22. First heating element; 23. Second heating element; 3. Heat conductor; 31. Heat-conducting protrusion; 32. Bottom wall; 33. Enclosure wall; 331. Inner enclosure wall; 332. Outer enclosure wall; 3a. Steam heating chamber; 3a1. Steam inlet passage; 3a2. Steam outlet passage; 3b. Air insulation chamber; 3c. Liquid heating chamber; 3d. Connecting gap; 4. Juice receiving tray; 41. Steam guide tube; 4a. Steam outlet; 5. Fasteners; 6. Sealing ring; 7. Steamer; 8. Sealing components. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0032] Reference Figures 1 to 5 As shown, some embodiments of this application provide a steam cooking appliance, including a water tank 1 and a heating plate 2 disposed on the water tank 1. The heating plate 2 includes a plate body 21, a first heating tube 22 and a second heating tube 23. The first heating tube 22 and the second heating tube 23 are both disposed on the lower surface of the plate body 21, and the first heating tube 22 is located around the second heating tube 23.

[0033] The upper surface of the plate 21 is equipped with a heat conductor 3, which is attached to the upper surface of the plate 21. The vertical projection of the heat conductor 3 on the plate 21 is located in the inner area of ​​the first heating tube 22, and the heat conductor 3 is vertically aligned with the second heating tube 23. The first heating tube 22 is used to heat the water in the water tank 1 to generate steam. The heat conductor 3 has an upwardly protruding heat-conducting protrusion 31, which is used to heat the steam generated in the water tank 1 by the heat transferred from the second heating tube 23 to the heat-conducting protrusion 31.

[0034] The steam cooking appliance provided in this application embodiment has a first heating tube 22 and a second heating tube 23 installed on the lower surface of the plate 21 of the heating plate 2, and a heat conductor 3 installed on the upper surface of the plate 21. The heat conductor 3 is attached to the upper surface of the plate 21, and the vertical projection of the heat conductor 3 on the plate 21 is located in the inner area of ​​the first heating tube 22. In this way, the first heating tube 22 is used to heat the water in the water tank 1 located around the heat conductor 3 to generate steam. The heat conductor 3 and the second heating tube 23 are vertically aligned, so that the heat generated by the second heating tube 23 can be transferred to the heat conductor 3 through the plate 21. The heat conductor 3 has an upwardly protruding heat-conducting protrusion 31. In this way, the heat transferred by the second heating tube 23 to the heat-conducting protrusion 31 is used to heat the steam generated in the water tank 1 to form superheated steam, thereby improving the heating efficiency of the steam cooking appliance.

[0035] In the above embodiments, the steam cooking appliance uses a heat conduction method to heat and transfer heat to the heat conductor 3 installed on the upper surface of the plate 21 by using the second heating tube 23 located on the lower surface of the plate 21. Then, the heat transferred by the second heating tube 23 to the heat-conducting protrusion 31 of the heat conductor 3 is used to reheat the steam generated in the water tank 1 to form superheated steam. There is no need to install a heating tube on the upper surface of the plate 21 for reheating the steam generated in the water tank 1, nor is there a need to open a clearance hole on the plate 21 for the wire to pass through for wiring of the heating tube. It is only necessary to ensure that the heat conductor 3 is in contact with the upper surface of the plate 21. There is no need to set a positioning protrusion on the upper surface of the plate 21 to support the heat conductor 3. Instead, the heat-conducting protrusion 31 that protrudes upward relative to the upper surface of the plate 21 is simply machined on the heat conductor 3. This makes the structure of the heating plate 2 and the heat conductor 3 simple, the assembly process simplified, and the manufacturing cost reduced.

[0036] To improve the heat transfer effect of the second heating element 23 on the heat-conducting protrusion 31, in some embodiments, referring to Figure 1 , Figure 2 and Figure 3 As shown, at least a portion of the second heating element 23 is located below the heat-conducting protrusion 31. That is, at least a portion of the second heating element 23 is directly opposite the heat-conducting protrusion 31.

[0037] This configuration ensures that the heat generated by the second heating element 23 can be more effectively transferred to the heat-conducting protrusion 31 located above the plate 21, thereby improving the heating efficiency of the steam generated in the water tank 1 using the heat-conducting protrusion 31.

[0038] In some embodiments, refer to Figures 1 to 3 As shown, the heat conductor 3 includes a bottom wall 32 and a surrounding wall 33 extending upward from the periphery of the bottom wall 32. The heat-conducting protrusion 31 is located in the inner surrounding area of ​​the surrounding wall 33 and extends upward from the inner wall surface of the bottom wall 32. The bottom wall 32, the surrounding wall 33 and the heat-conducting protrusion 31 of the heat conductor 3 together form a steam heating chamber 3a.

[0039] This configuration allows the steam generated by heating water in the water tank 1 to enter the steam heating chamber 3a, and the heat-conducting protrusion 31 to reheat the steam in the steam heating chamber 3a, thereby increasing the temperature of the steam and forming superheated steam, thus improving the heating efficiency of the steam cooking appliance for food.

[0040] In practical implementation, the heat conductor 3 can be a block structure, or in other words, the heat conductor 3 is a heat-conducting block. A ring-shaped steam heating cavity 3a can be formed by recessing a localized area at the top of the heat-conducting block. The portion surrounding the steam heating cavity 3a forms the surrounding wall 33 of the heat-conducting block, the portion inside the steam heating cavity 3a forms the heat-conducting protrusion 31, and the portion at the bottom of the steam heating cavity 3a, the surrounding wall 33, and the heat-conducting protrusion 31 forms the bottom wall 32 of the heat-conducting block. This integrated processing of the heat-conducting block makes its processing easier and increases its structural strength.

[0041] Of course, the processing and forming method of the heat conductor 3 is not limited to the above limitations, and can be reasonably set according to actual needs.

[0042] To improve the heating efficiency of the heat-conducting protrusion 31 for steam, refer to Figure 4 As shown, multiple ribs can be spaced apart on the outer peripheral surface of the heat-conducting protrusion 31, so that the outer peripheral surface of the heat-conducting protrusion 31 forms a sequentially alternating concave-convex structure, thereby increasing the contact area between the heat-conducting protrusion 31 and the steam entering the steam heating chamber 3a, and thus improving the heating efficiency of the heat-conducting protrusion 31 for steam. In a specific implementation, the multiple ribs extend along the height direction of the heat-conducting protrusion 31, and a steam channel for steam flow is formed between two adjacent ribs.

[0043] In some embodiments, refer to Figures 1 to 3 As shown, at least a portion of the second heating element 23 is located below the steam heating chamber 3a. This arrangement utilizes the heat generated by the second heating element to heat the steam entering the steam heating chamber 3a, preventing condensation due to low temperatures within the steam heating chamber 3a.

[0044] It should be understood that the bottom wall 32, the surrounding wall 33, and the heat-conducting protrusion 31 of the heat conductor 3 together form the steam heating chamber 3a. The surrounding wall 33 of the heat conductor 3 forms the outer cavity wall of the steam heating chamber 3a, and the heat-conducting protrusion 31 forms the inner cavity wall of the steam heating chamber 3a. If the second heating tube 23 is located completely below the heat-conducting protrusion 31, although it can better transfer heat to the heat-conducting protrusion 31, it is easy to cause poor heating effect of the steam in the area of ​​the steam heating chamber 3a that is relatively far away from the heat-conducting protrusion 31 (or the area that is relatively close to the surrounding wall 33 of the heat conductor 3). It is easy to cause the steam in this area to condense due to poor heating effect, which is not conducive to the rapid heating of the steam, and it is also easy to cause the condensate to accumulate at the bottom of the steam heating chamber 3a, thus hindering the flow of steam in the steam heating chamber 3a.

[0045] In specific implementation, in order to achieve the heating effect of the second heating tube 23 on both the heat-conducting protrusion 31 and the steam heating chamber 3a, refer to Figures 1 to 3As shown, a portion of the second heating tube 23 is located below the heat-conducting protrusion 31, and another portion of the second heating tube 23 is located below the steam heating chamber 3a.

[0046] To achieve the mounting of the heat conductor 3 on the heating plate 2, in some embodiments, refer to... Figure 2 As shown, the heat conductor 3 is fixed to the disk body 21 by fasteners 5, and the fasteners 5 are installed and fixed to the disk body 21 and the heat conductor 3 from the side of the disk body 21 away from the heat conductor 3.

[0047] In the above embodiment, the fastener 5 is installed and fixed from the side of the disc 21 away from the heat conductor 3, so that the fastener 5 does not penetrate the heat conductor 3, which helps to ensure the sealing of the heat conductor 3 and reduces the risk of water or steam in the water tank 1 leaking to the bottom of the disc 21.

[0048] In a specific implementation, a screw post can be provided on the side surface of the disk 21 opposite to the heat conductor 3, and a screw hole corresponding to the screw post can be provided on the heat conductor 3. The screw hole does not need to penetrate the upper surface of the heat conductor 3. By screwing the screw into the screw post and the corresponding screw hole, the disk 21 and the heat conductor 3 can be tightly connected.

[0049] Of course, the connection between the heat conductor 3 and the disk 21 is not limited to fastening with fasteners 5 such as screws; other methods such as bonding and welding can also be used to achieve a fixed connection.

[0050] In some embodiments, refer to Figure 2 and Figure 3 As shown, the enclosure 33 of the heat conductor 3 has a double-wall structure, including an inner enclosure 331 and an outer enclosure 332 located outside the inner enclosure 331, with an air insulation cavity 3b formed between the inner enclosure 331 and the outer enclosure 332.

[0051] In the above embodiment, by setting the enclosure 33 of the heat conductor 3 to be a double-wall structure and forming an air insulation cavity 3b between the inner enclosure 331 and the outer enclosure 332, the heat transfer is blocked, reducing the impact of the water heating on the inner high-temperature steam heating cavity 3a, which is conducive to the rapid heating of the steam in the steam heating cavity 3a.

[0052] In a specific implementation, the top of the inner wall 331 can be connected to the top of the outer wall 332, and the bottom of the inner wall 331 can be separated from the bottom of the outer wall 332 and spaced apart, so as to form an air insulation cavity 3b with a closed top and an open bottom between the inner wall 331 and the outer wall 332. Since the thermal conductivity of air is poor, the air insulation cavity 3b can be used to effectively block heat transfer.

[0053] In other embodiments, reference is made to Figure 5As shown, enclosure 33 is a single-layer wall structure. That is to say, enclosure 33 is not limited to a double-layer wall structure; it can also be a single-layer wall structure.

[0054] By setting the enclosure 33 of the heat conductor 3 to a single-layer wall structure, the structure of the heat conductor 3 is simplified and the manufacturing is convenient; and compared with the double-layer wall structure, the space occupied by the heat conductor 3 in the water tank 1 is reduced, which is conducive to increasing the space for storing water and steam in the water tank 1.

[0055] To achieve a good sealing effect, in some embodiments, reference is made to... Figure 2 , Figure 3 and Figure 5 As shown, a sealing ring 6 is provided between the bottom periphery of the heat conductor 3 and the upper surface of the disk 21.

[0056] This configuration is designed to prevent water or steam from entering the bottom area of ​​the heat conductor 3 using the sealing ring 6, thus preventing water or steam from remaining between the bottom of the heat conductor 3 and the plate 21 of the heating plate 2. It also effectively reduces the risk of water or steam leaking below the plate 21 after entering the bottom of the heat conductor 3.

[0057] In specific implementation, for the heat conductor 3 with a double-wall structure, refer to Figure 2 and Figure 3 As shown, two sealing rings 6 are provided between the bottom periphery of the heat conductor 3 and the upper surface of the disk 21. Specifically, a sealing ring 6 is provided between the bottom of the inner wall 331 and the upper surface of the disk 21, and a sealing ring 6 is also provided between the bottom of the outer wall 332 and the upper surface of the disk 21. For a heat conductor 3 with a single-wall structure, refer to... Figure 5 As shown, a sealing ring 6 is provided between the bottom of the enclosure 33 of the heat conductor 3 and the upper surface of the disk 21. Specifically, the number of sealing rings 6 is not limited to one, and two or more can be provided as needed.

[0058] To ensure the heat transfer efficiency of the second heating element 23 to the heat conductor 3 through the disk 21, in some embodiments, refer to Figure 2 , Figure 3 and Figure 5 As shown, the upper surface of the disk 21 is flat, and the bottom surface of the heat conductor 3 is attached to the upper surface of the disk 21.

[0059] This configuration ensures a large contact area between the heat conductor 3 and the plate 21, thereby improving the efficiency of the second heating tube 23 in transferring heat to the heat conductor 3 through the plate 21. Furthermore, by making the upper surface of the plate 21 flat, the structure of the plate 21 is simple, easy to process, and facilitates the installation and fixation of the heat conductor 3 on the plate 21.

[0060] To achieve rapid steam output, in some embodiments, reference is made to... Figure 1 and Figure 3 As shown, the water tank 1 is provided with a surrounding rib 11, the heating plate 2 is located at the bottom of the surrounding rib 11, the heat conductor 3 is located in the inner surrounding area of ​​the surrounding rib 11, the surrounding rib 11, the surrounding wall 33, and the area on the heating plate 2 located between the surrounding rib 11 and the surrounding wall 33 together form a liquid heating chamber 3c, at least a part of the first heating tube 22 is located below the liquid heating chamber 3c, and the liquid heating chamber 3c is connected to the steam heating chamber 3a.

[0061] In the above embodiment, the water in the liquid heating chamber 3c is heated by the first heating tube 22, rather than the water in the entire water tank 1, which helps to increase the heating rate of the water in the liquid heating chamber 3c, thereby achieving the purpose of quickly generating steam.

[0062] In specific implementation, in order to improve the heating efficiency of the water in the liquid heating chamber 3c by using the first heating tube 22, the first heating tube 22 can be located entirely below the liquid heating chamber 3c, so that the heat generated by the first heating tube 22 can be better transferred to the water in the liquid heating chamber 3c through the plate 21.

[0063] In some embodiments, refer to Figure 1 and Figure 3 As shown, the steam cooking appliance also includes a drip tray 4, which is supported on the top of the surrounding rib 11. The drip tray 4 is provided with a downwardly protruding steam guide tube 41, which is inserted into the steam heating chamber 3a and divides the steam heating chamber 3a into a connected steam inlet channel 3a1 and a steam outlet channel 3a2. A connecting gap 3d is formed between the lower surface of the drip tray 4 and the top of the surrounding wall 33, which connects the liquid heating chamber 3c and the steam inlet channel 3a1.

[0064] In the above embodiment, the steam heating chamber 3a is divided into a connected steam inlet channel 3a1 and a steam outlet channel 3a2 by the steam guide tube 41, and a connecting gap 3d is formed between the lower surface of the drip tray 4 and the top of the surrounding wall 33 of the heat conductor 3. This allows the steam generated in the liquid heating chamber 3c to enter the steam inlet channel 3a1 through the connecting gap 3d, and then flow to the steam outlet channel 3a2 through the steam inlet channel 3a1. This allows the steam to come into contact with the heat-conducting protrusion 31 of the heat conductor 3 for heat exchange during the flow process, so as to achieve the purpose of secondary heating of the steam and avoid the problem that the steam flows out before it has fully exchanged heat with the heat conductor 3.

[0065] For example, refer to Figure 3As shown in the diagram, the arrows indicate the direction of steam flow. To ensure that the generated high-temperature steam can heat the food in the steamer 7 located above the drip tray 4, the upper end of the steam guide cylinder 41 is open to form a steam outlet 4a, so that the superheated steam flowing out from the steam outlet channel 3a2 can reach the steamer 7 through the steam outlet 4a and heat the food in the steamer 7.

[0066] Furthermore, in the above embodiments of this application, by providing a downwardly protruding steam guide tube 41 on the drip tray 4, the steam guide tube 41 and the heat conductor 3 are used to achieve the purpose of rapid steam output. The structure is simple, the number of parts is small, the assembly is convenient, the cost is low, and it is not easy to lose the high-temperature steam function due to missing parts.

[0067] Specifically, traditional steam cooking appliances require numerous components to generate high-temperature steam, including a heating plate assembly, a heat insulation shroud assembly (including an inner and outer steam insulation shroud), a heating element assembly for secondary steam heating, and bottom and top sealing rings for sealing. The complex interrelationships between these components increase the probability of malfunction and raise costs. Furthermore, the numerous components make installation and maintenance cumbersome and time-consuming, prone to assembly errors, which can affect the appliance's lifespan and stability. In particular, if the aforementioned steam insulation shroud assembly is missing, the appliance cannot generate high-temperature steam due to the inability to perform secondary steam heating, resulting in functional failure. In the embodiments described above, only the heat conductor 3 needs to be fixed on the upper surface of the heating plate 2, and a downwardly protruding steam guide cylinder 41 is provided on the drip tray 4. The steam guide cylinder 41 and the heat conductor 3 work together to achieve rapid steam generation. This design is simple in structure, has fewer parts, simplifies assembly, facilitates assembly, reduces costs, lowers malfunctions and defects, and reduces the risk of losing the high-temperature steam function due to missing parts. Furthermore, the reduced number of parts improves the user experience, making it easier for users to clean and maintain the steam cooking appliance.

[0068] In practical implementation, to avoid missing parts, the steam guide tube 41 can be integrally formed with the drip tray 4, or the steam guide tube 41 can be fixed to the drip tray 4 in a way that is not removable by the user. In this way, when using it, the user only needs to place the drip tray 4 on the water tank 1, and the steam guide tube 41 on the drip tray 4 can be inserted into the steam heating chamber 3a formed on the heat conductor 3 to ensure the realization of the secondary heating function of steam. Of course, in practical implementation, the steam guide tube 41 can also be detached from the drip tray 4.

[0069] To achieve the connection between the steam inlet passage 3a1 and the steam outlet passage 3a2, refer to the following settings. Figure 3As shown, after the steam guide tube 41 is inserted into the steam heating chamber 3a, there is a gap between the bottom end of the steam guide tube 41 and the bottom wall of the steam strengthening chamber, so as to connect the steam inlet channel 3a1 and the steam outlet channel 3a2 by utilizing the gap formed between the two.

[0070] In addition, refer to Figure 3 As shown, in order to prevent the water in the liquid heating chamber 3c from boiling and overflowing into the steam heating chamber 3a inside the heat conductor 3, the height of the wall 33 of the heat conductor 3 can be set higher than the maximum water level set in the water tank 1; at the same time, since the height of the wall 33 of the heat conductor 3 is relatively high, in order to ensure that a connecting gap 3d is formed between the lower surface of the drip tray 4 and the top of the wall 33 of the heat conductor 3, the area on the drip tray 4 corresponding to the upper and lower parts of the wall 33 of the heat conductor 3 can be raised upward.

[0071] In addition, refer to Figure 1 and Figure 5 As shown, in order to prevent the steam generated in the liquid heating chamber 3c from overflowing, the top of the rib 11 of the water tank 1 is provided with a sealing element 8. When the drip tray 4 is placed on the water tank 1, the lower surface of the drip tray 4 presses on the sealing element 8 at the top of the rib 11.

[0072] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steam cooking appliance, comprising a water tank and a heating plate disposed on the water tank, characterized in that, The heating plate includes a plate body, a first heating tube and a second heating tube. The first heating tube and the second heating tube are both located on the lower surface of the plate body, and the first heating tube is located around the second heating tube. A heat conductor is installed on the upper surface of the disc, and the heat conductor is attached to the upper surface of the disc. The vertical projection of the heat conductor on the disc is located in the inner area of ​​the first heating tube, and the heat conductor is vertically aligned with the second heating tube, so as to use the first heating tube to heat the water in the water tank to generate steam. The heat conductor has an upwardly protruding heat-conducting protrusion, so as to use the heat transferred from the second heating tube to the heat-conducting protrusion to heat the steam generated in the water tank.

2. The steam cooking appliance according to claim 1, characterized in that, At least a portion of the second heating element is located below the heat-conducting protrusion.

3. The steam cooking appliance according to claim 1, characterized in that, The heat conductor includes a bottom wall and a surrounding wall extending upward from the periphery of the bottom wall. The heat-conducting protrusion is located in the inner region of the surrounding wall and extends upward from the inner wall surface of the bottom wall. The bottom wall, the surrounding wall, and the heat-conducting protrusion together form a steam heating chamber.

4. The steam cooking appliance according to claim 3, characterized in that, At least a portion of the second heating element is located below the steam heating chamber.

5. The steam cooking appliance according to claim 3, characterized in that, The enclosure is a single-layer wall structure; Alternatively, the enclosure may be a double-wall structure, comprising an inner enclosure and an outer enclosure located outside the inner enclosure, with an air-insulated cavity formed between the inner enclosure and the outer enclosure.

6. The steam cooking appliance according to claim 3, characterized in that, The water tank is provided with surrounding ribs, the heating plate is located at the bottom of the surrounding ribs, the heat conductor is located in the inner area of ​​the surrounding ribs, the surrounding ribs, the surrounding wall, and the area on the heating plate located between the surrounding ribs and the surrounding wall together form a liquid heating chamber, at least a portion of the first heating tube is located below the liquid heating chamber, and the liquid heating chamber is connected to the steam heating chamber.

7. The steam cooking appliance according to claim 6, characterized in that, The steam cooking appliance also includes a drip tray, which is supported on the top of the surrounding rib. The drip tray has a downwardly protruding steam guide tube, which is inserted into the steam heating chamber and divides the steam heating chamber into a connected steam inlet channel and a steam outlet channel. A connecting gap is formed between the lower surface of the drip tray and the top of the surrounding wall, and the connecting gap connects the liquid heating chamber and the steam inlet channel.

8. The steam cooking appliance according to any one of claims 1 to 7, characterized in that, The upper surface of the disk is flat, and the bottom surface of the heat conductor is fitted to the upper surface of the disk.

9. The steam cooking appliance according to any one of claims 1 to 7, characterized in that, The heat conductor is fixed to the disk body by fasteners, and the fasteners are installed and fixed to the disk body and the heat conductor from the side of the disk body facing away from the heat conductor.

10. The steam cooking appliance according to any one of claims 1 to 7, characterized in that, A sealing ring is provided between the bottom periphery of the heat conductor and the upper surface of the disk.

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