Efficient anti-condensation steam cooking device

Abstract

The invention discloses an efficient anti-condensation steam cooking device, and relates to the technical field of steam cookers, the efficient anti-condensation steam cooking device comprises a device base and an upper cover, a steam generator is arranged in the device base, and a steam nozzle is arranged on a food material bearing table top at the top of the device base; the food material bearing table top is composed of a center flat bottom part, an annular inclined face flow guide part, a flow guide vertical face and an electric heating body. Condensed water is stored at the bottom of the central flat; the annular slope flow guide part is provided with a supporting boss part and a flow guide groove, and condensate water is gathered to the central flat bottom part; the flow guide vertical face prevents condensate water from overflowing; the electric heating body heats the condensate water; the steam generator comprises a mounting seat body, a steam generation water pipe and a heating device, the mounting seat body is provided with a steam-liquid separation cavity and a steam outlet nozzle, the outlet end of the steam generation water pipe is arranged in the steam-liquid separation cavity, and a labyrinth channel is arranged in the steam-liquid separation cavity; the steam generation water pipe is spiral, and the heating device is arranged in the cylindrical inner cavity of the steam generation water pipe and located below the steam-liquid separation cavity. In the using process, condensate water and food materials are rapidly separated, the steam dryness is high, the temperature is high, and the heating efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of steam cookers, and in particular to a steam cooking device. Background Art

[0002] As the pace of modern life accelerates, people's pursuit of cooking efficiency and food taste is increasing. Traditional cooking methods often rely on direct heating of ingredients over open flames or electric heating elements. This method not only consumes a lot of energy, but also makes it difficult to precisely control the heating uniformity and cooking time of the ingredients during the cooking process, thus affecting the taste and nutritional value of the food.

[0003] To overcome the shortcomings of traditional cooking methods, steam cooking devices have emerged. Steam cooking utilizes water vapor as a heat transfer medium. Through the penetration and heating effects of steam, ingredients are evenly heated in a relatively mild environment, resulting in a short cooking time and preserving the original flavor and nutrients of the ingredients to the greatest extent possible. However, existing steam cooking devices still have limitations in design and functionality. Regarding the food loading surface, some steam cooking devices have poorly designed loading surfaces, resulting in uneven steam distribution within the cooking chamber, which affects the cooking quality. Furthermore, some devices generate condensed water during the cooking process, which not only affects the heating efficiency of the food but also accumulates over time, causing the food to over-soak, affecting its taste and quality. Regarding the steam generator, existing steam generators often mix water vapor with liquid water during steam generation and delivery. This mixing of liquid water affects the dryness and temperature of the steam, thus affecting heating efficiency. Furthermore, the design of the water tank can cause inconvenience to users.

[0004] Therefore, in view of the problems existing in the existing steam cooking devices, it is necessary to design a new type of steam cooking device to meet the needs of modern people for efficient, healthy and convenient cooking methods. Summary of the Invention

[0005] In view of this, the present application provides a steam cooking device to solve the technical problems of uneven heating of food, long contact time between condensed water and food, and slow heating efficiency.

[0006] To achieve the above object, the present invention provides the following technical solutions: A steam cooking device includes a device base and an openable upper cover placed on the device base to form a cooking cavity. The top of the device base is provided with a food loading table. A steam generator for generating steam is provided in the device base. A steam nozzle with a divergent steam discharge direction is provided in the edge area of the food loading table. The steam generator is connected to the steam nozzle.

[0007] The steam cooking device has a dual-mode condensate treatment system, including: The food loading table has: The center flat bottom is used to store condensed water and keep the bottom center of the food; An annular inclined guide portion is connected to the outer edge of the central flat bottom. A plurality of supporting bosses are spaced apart on the surface of the annular inclined guide portion. A guide groove for guiding the flow of condensed water is formed between adjacent supporting bosses, and is used to guide the condensed water into the central flat bottom. A diversion facade is connected to the outer edge of the annular inclined diversion portion and extends upward to prevent condensed water from overflowing; an electric heating body, which is arranged below the central flat bottom and is used to heat the condensed water to convert it into vapor; The steam generator includes a mounting base body and a steam generating water pipe and a heating device integrated in the mounting base body, wherein: A vapor-liquid separation chamber and a steam outlet nozzle connected to the vapor-liquid separation chamber are provided on the top of the mounting base. The outlet end of the steam generating water pipe is located in the vapor-liquid separation chamber, and the outlet end is indirectly connected to the steam outlet nozzle through the vapor-liquid separation chamber. At least one partition is provided in the vapor-liquid separation chamber to form a labyrinthine channel for extending the flow path of the vapor-liquid mixture; The steam generating water pipe is arranged in a spiral shape. The heating device heats the steam generating water pipe and is placed in the cylindrical inner cavity of the steam generating water pipe. The steam generating water pipe is located below the steam-liquid separation cavity.

[0008] Furthermore, the inclination angle of the inclined guide portion ranges from 5° to 15°, the plurality of sheet-like protruding support boss portions are distributed in a petal shape, and the width of the guide groove is 3-8 mm.

[0009] Furthermore, the depth of the guide groove gradually decreases from the central flat bottom toward the outside.

[0010] Furthermore, the central flat bottom is formed by a concave cavity sunken 3-8 mm, and the height of the diversion facade is 3-10 mm.

[0011] Furthermore, an annular platform portion is provided between the guide vertical surface and the annular inclined guide portion.

[0012] Furthermore, the base body of the device base includes a supporting base, a tray body and a pressure ring body. The tray body is pressed onto the supporting base by the pressure ring body, and the concave bottom surface of the tray body forms a food loading table.

[0013] Furthermore, the partition has a C-shaped structure, an upper flow channel is provided on the top of the corresponding partition, and a side flow channel is formed between adjacent partitions. The outlet end of the steam generating water pipe is located in the central area of the maze channel, and the outlet direction of the outlet end is perpendicular to the steam flow path of the maze channel.

[0014] Furthermore, the heating device is spiral-shaped, and the steam generating water pipe and the heating device are respectively matched and installed through corresponding spiral channels provided on the mounting base body, and the axes of the two spiral channels coincide.

[0015] Furthermore, the heating device extends to the bottom area of the vapor-liquid separation chamber to perform secondary heating and vaporization on the liquid water in the vapor-liquid separation chamber.

[0016] Furthermore, the pressure ring body and the tray body are sealed by providing a sealing silicone ring or gluing, and the pressure ring body is provided with a limiting flange that cooperates with the upper cover.

[0017] Furthermore, the base of the device also includes a steam generator, a control module, a water pump, a temperature monitoring device and a detachable water tank installed in the main body of the seat. The steam outlet of the steam generator is connected to the steam nozzle through a pipeline, and the water in the water tank is input into the steam generator through the water pump. The control module integrates a temperature control circuit, a timing control circuit and a switch control circuit.

[0018] Furthermore, the water tank includes a transparent lower box body and an upper cover body fixedly connected together, a water bend is fixedly installed on the lower box body, and a water intake pipe capable of being plugged into and matched with the outlet pipe of the water bend is provided in the base of the device.

[0019] Furthermore, the steam nozzle has a plurality of steam outlets facing different or the same directions, and spiral guide vanes are provided at the outlets of the steam outlets.

[0020] Furthermore, the central flat bottom is formed by a concave cavity sunken by 3-8 mm.

[0021] Furthermore, the temperature monitoring device is a contact temperature probe for monitoring the temperature of the steam generator and / or the tray body.

[0022] Furthermore, a hydrophobic coating is sprayed on the upper surface of the supporting boss portion.

[0023] It can be seen from the above technical solutions that the food loading table of the present invention has the following advantages: 1. In this application, a food loading table with a low center and high edges is used to load food. Condensed water during the cooking process can be collected in the low-lying area in the center to avoid long-term contact between the condensed water and the food, causing excessive soaking of the food.

[0024] 2. Uniform heating: The bottom of the food is placed in a suspended manner through the structural design of the guide groove and the central flat bottom. The steam flows along the guide groove to heat the bottom of the food evenly, thereby making the food evenly heated, shortening the cooking time and reducing the loss of nutrients.

[0025] 3. The installation method of the water tank in this application facilitates the water replenishment operation and the cleaning operation of unused water of the steam cooking device, and is convenient, clean and hygienic to use; 4. The condensed water collected in the central flat bottom is reheated and vaporized under the action of the electric heating body. For food that needs to be heated for a long time, the condensed water will not flow back along the guide groove during the heating and cooking process, and will not cause the bottom of the food to be flooded and affect the heating efficiency and appearance of the bottom of the food.

[0026] The advantages of steam generation equipment are: 1. Efficient Vapor-Liquid Separation: The vapor-liquid separation chamber effectively separates liquid water from steam before it is ejected. By utilizing the difference in specific gravity, the liquid water automatically settles to the bottom of the chamber, achieving efficient vapor-liquid separation through the physical structure. This ensures steam dryness and temperature, and improves heating efficiency.

[0027] 2. Enhanced separation effect: The labyrinth channel set in the vapor-liquid separation chamber further lengthens the buffer path of the vapor-liquid mixed medium. This makes the vapor-liquid separation effect better, ensures the purity of the steam, and reduces the impact of liquid water on the steam quality.

[0028] 3. Space Utilization and Heat Recovery: The steam generating water pipe and heating device adopt a spiral structure and are installed in the spiral channel of the mounting base. This structure not only saves space but also allows the heating device to heat the mounting base simultaneously while heating the steam generating water pipe. This allows the liquid water remaining in the vapor-liquid separation chamber to be re-vaporized and effectively utilized, thereby improving the overall thermal energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0030] Figure 1 This is a schematic diagram of the structure of this application.

[0031] Figure 2 This is a schematic structural diagram of the device base of this application.

[0032] Figure 3 This is the first schematic diagram of the internal structure of the device base of this application.

[0033] Figure 4 This is a structural schematic diagram of the tray body of this application.

[0034] Figure 5 This is another structural schematic diagram of the tray body of this application.

[0035] Figure 6 This is another structural schematic diagram of the tray body of this application.

[0036] Figure 7 This is a second schematic diagram of the internal structure of the device base of this application.

[0037] Figure 8 This is the third schematic diagram of the internal structure of the device base of this application.

[0038] Figure 9 For this application Figure 8 A schematic diagram of the structure at point A in FIG.

[0039] Figure 10 This is a schematic structural diagram of the steam generating device of this application.

[0040] Figure 11 This is a schematic cross-sectional view of the internal structure of the steam generating device of the present application.

[0041] Figure 12 This is a schematic structural diagram of the vapor-liquid separation chamber of the steam generating device of the present application.

[0042] Figure 13 This is a schematic diagram of the layout of the steam generating water pipes and heating device of the steam generating device of this application.

[0043] Explanation of the accompanying drawings: device base 1, base body 11, support base 111, pressure ring body 112, tray body 113, central flat bottom 1131, annular inclined guide part 1132, guide vertical surface 1133, supporting boss part 1134, guide groove 1135, annular platform part 1136, electric heating body 1137, water storage groove 1138, water intake pipe 114, water tank 12, water diversion elbow 121, operation panel 13, steam nozzle 14, steam generator 15, mounting base 151, vapor-liquid separation chamber 1511, steam outlet nozzle 1512, spiral channel 1513, partition 1514, end cover 152, steam generating water pipe 153, outlet end 1531, heating device 154, control module 16, water pump 17, upper cover 2. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail in conjunction with the embodiments and drawings. Here, the illustrative embodiments of this application and their descriptions are used to explain this application, but are not intended to limit this application.

[0045] refer to Figures 1 to 13 ,like Figure 1 、 Figure 2 、 Figure 3 、 Figure 7 and Figure 8As shown, this embodiment provides a steam cooking device, including a device base 1 and an openable upper cover 2, the upper cover 2 is placed on the device base 1 to form a cooking cavity, the device base 1 has a food loading table with a low center and high edges, the device base 1 has a steam generator 15 for generating steam, the edge area of the food loading table is provided with a steam nozzle 14 with a steam outlet direction diverging, the steam generator 15 is connected to the steam nozzle 14, wherein the device base 1 includes a base body 11, the food loading table is located on the base body 11, and the base body 11 is provided with a steam generator 15 for generating steam. There are a steam generator 15, a control module 16, a water pump 17, an operation panel 13, a temperature monitoring device and a detachable water tank 12. The steam outlet of the steam generator 15 is connected to the steam nozzle 14 through a pipeline. The water in the water tank 12 is input into the steam generator 15 through the water pump 17. The control module 16 integrates a temperature control circuit, a timing control circuit and a switch control circuit. The working principles of the temperature control circuit, the timing control circuit and the switch control circuit and the working principle of this application can refer to the steam boiler in the prior art. The detachable water tank 12 makes it convenient to add water and thus easy to use.

[0046] In this embodiment, preferably, the temperature monitoring device is a contact temperature probe, which is used to monitor the temperature of the steam generator 15 and / or the tray body 113 .

[0047] like Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the food loading surface is provided with a guide groove 1135 for downward liquid flow. A steam nozzle 14, with a diverging steam discharge direction, is located within the cooking chamber. During operation, condensed water flows downward along the guide groove 1135 and into the central recess of the food loading surface, where it is temporarily stored to prevent prolonged contact with the food, which could affect the quality and heating efficiency of the food's bottom. The design of the guide groove 1135 not only accelerates the collection of condensed water, but also allows steam to directly contact the bottom of the food, ensuring even heating and shortening cooking time. This makes the guide groove 1135 both a condensate diverter and a steam diffuser.

[0048] In the present application, the steam nozzle 14 is elevated above the food loading surface and located at the edge of the cooking chamber to prevent interference between the steam nozzle 14 and the food, thereby affecting steam supply efficiency. The protruding configuration of the steam nozzle 14 prevents clogging caused by condensed water or grease backflow. The steam nozzle 14 has multiple steam outlets with different orientations or orientations. The use of multiple steam outlets solves the problem of the product being unable to function properly when a single steam outlet is blocked, ensuring that the generated steam can enter the cooking chamber and provide a pressure relief function. When multiple steam outlets operate simultaneously, the steam can also be quickly and evenly filled into the cooking chamber, resulting in more uniform heating of the food. The steam nozzle 14 adopts a multi-directional steam outlet design to ensure uniform steam distribution. A spiral guide vane is provided at the steam outlet, causing the steam flow to enter the cooking chamber in a spiral shape, allowing the steam to diffuse more quickly to the surrounding area, thereby achieving a uniform temperature within the cooking chamber.

[0049] The food carrying table that can separate and collect condensed water from food can also adopt a structure with a high center and low edges. In order to be able to collect a large amount of condensed water, an annular condensed water collection groove can be further provided at the low edge.

[0050] like Figure 2 、 Figure 3 、 Figure 4 and Figure 6 As shown, in order to collect more condensed water and be suitable for food that takes a long time to cook, the center of the food supporting table is the center flat bottom 1131, and the center flat bottom 1131 is formed by a concave cavity that sinks 3-8 mm. The depth of the concave cavity is preferably 6 mm, so that the center flat bottom 1131 has a certain depth. The depth design can increase the condensed water capacity, avoid the accumulation of condensed water in the guide groove 1135, and affect the diffusion of steam to the bottom of the food, and prevent the food from being soaked for a long time. For food with better overall support, the bottom center of the food will be suspended, and the part of the food in contact with the guide groove 1135 will always keep the bottom partially suspended, so that the bottom can be fully exposed to the steam, thereby improving the heating efficiency of the center part of the food and shortening the cooking time.

[0051] In order to allow the condensed water to smoothly enter the central depression of the food supporting table, the annular part of the food supporting table connected to the central flat bottom 1131 is an annular inclined guide part 1132, and the guide groove 1135 is located on the annular inclined guide part 1132. The annular inclined guide part 1132 can also support and hold up the food. For food with better overall support, the bottom center position of the food will be suspended, so that the bottom center part of the food will be in contact with more steam, accelerating heating and shortening the cooking time of the food. Since the part of the food in contact with the annular inclined guide part 1132 is always in a partially suspended state, the condensed water can be guided smoothly and the area of the food contacted by the condensed water is reduced.

[0052] In the present invention, the inclination angle of the inclined guide portion 1132 is preferably in the range of 5°-15°, preferably 10°.

[0053] In this embodiment, preferably, the upper surface of the annular inclined guide portion 1132 has a plurality of support boss portions 1134 with sheet-like protrusion structures distributed along a petal shape, which are spaced apart. A guide groove 1135 for guiding the flow of condensed water is formed between adjacent support boss portions 1134, and the width of the guide groove 1135 is 3-8 mm.

[0054] In this embodiment, preferably, the gap width between two adjacent supporting bosses 1134 is about 5 mm. This structure not only ensures that the condensed water flows smoothly to the center, but also allows the bottom of the food to be suspended in the air, which can prevent the food from falling due to its own weight and causing the guide groove 1135 to be blocked, thereby affecting the collection of condensed water, and at the same time can increase the steam contact area.

[0055] The sheet-like raised support boss portion 1134 will increase the contact area between the bottom of the food and the food supporting table 113, provide good food support stability, and will not cause damage to the food, but the heating efficiency of the contact portion is low. In actual production, the support boss portion 1134 can also be replaced by a block-shaped boss portion or a point-shaped boss portion. The cross-sectional area of the sheet-like boss portion is larger than that of the block-shaped boss portion, and the cross-sectional area of the block-shaped boss portion is larger than that of the point-shaped boss portion. The point-shaped boss portion is prone to cause local deformation of the food due to concentrated force, but the bottom of the food is heated more evenly and has high heating efficiency.

[0056] In order to prevent the center of the food from collapsing during the heating process, the depth of the guide groove 1135 gradually decreases from the center flat bottom 1131 outward, and the thickness of the supporting boss part 1134 gradually decreases from the center flat bottom 1131 outward. Without affecting the convergence of condensed water and the diffusion of hot steam, the upper surface of the supporting boss part 1134 of the food supporting table 113 that is in contact with the food is made closer to a horizontal state, so that the vertical pressure of the food weight dispersed on the food supporting table 113 is large and the central falling force is reduced; at the same time, the gradient guide groove design reduces the steam penetration resistance by 47% and shortens the time for the center temperature of the food to reach 100°C by 22%.

[0057] In order to allow the condensed water to flow away quickly, a hydrophobic coating is sprayed on the upper surface of the supporting boss portion 1134 .

[0058] In order to ensure that the food is placed stably during the heating process, anti-slip grooves are provided on the upper surface of the supporting boss portion 1134.

[0059] In order to prevent steam from rushing out radially along the edge of the upper cover 2 and causing burns to people, an upward-extending guide vertical surface 1133 is also provided at the outer edge of the food supporting table. The guide vertical surface 1133 changes the direction of the steam flow to guide the steam to flow upward into the cooking cavity, while improving the utilization rate of the steam and preventing condensed water from overflowing.

[0060] In the present invention, preferably, the height of the guide facade 1133 is 3-10 mm.

[0061] like Figure 5 As shown, in order to avoid the increase of condensed water collected in the central flat bottom 1131, which will reduce the temperature of the food supporting table and thus reduce the heating efficiency, at the same time, for food that needs to be heated for a long time, a long heating time will produce more condensed water, which is likely to cause the condensed water to flow back along the guide groove 1135, causing the surface of the food to contact and soak in the condensed water for a long time, based on the structure of embodiment 1, as shown in FIG. Figure 2 As shown, an electric heating body 1137 is provided on the lower surface of the central flat bottom 1131, and the electric heating body 1137 is used to heat the condensed water to turn it into vapor to reduce the content of the condensed water, thereby raising the temperature of the food supporting surface.

[0062] like Figure 6 As shown, in order to increase the storage capacity of condensed water at the central flat bottom 1131 and reduce the amount of condensed water that contacts the bottom surface of the food, a plurality of water storage grooves 1139 are provided on the bottom surface of the central flat bottom 1131. The water storage grooves 1139 are strip grooves, semicircular cavities or other shapes.

[0063] like Figure 8 As shown, in this embodiment, the water tank 12 has a fixedly installed water diversion elbow 121, and the water inlet of the lower elbow of the water diversion elbow 121 is close to the bottom surface of the water tank 12, which can ensure continuous and reliable water supply even under low water volume conditions. The device base 1 has a water intake plug 114 that can be plugged into the water outlet pipe of the water diversion elbow 121. The plug-in connection enables the water tank 12 to be quickly disassembled and assembled.

[0064] In actual use, the water diversion elbow 121 can also be directly connected to the water pump through a hose. After the water tank 12 is pulled out, it will not be separated from the hose. This method ensures stable sealing at the water outlet of the water diversion elbow 121.

[0065] In this embodiment, preferably, the water tank 12 is configured to be pull-out. The water tank 12 includes a transparent lower box body and an upper cover body fixed together by ultrasonic welding, or includes a transparent lower box body and an openable upper cover body. A water diversion elbow 121 is fixedly installed on the lower box body. When the lower box body and the upper cover body are fixed, water can be replenished through the water diversion elbow 121 or the water replenishing port, which can prevent dust and bacteria from accumulating at the connection seal between the lower box body and the upper cover body; when the upper cover body is removable, the lower box body can be conveniently cleaned thoroughly to avoid bacterial residue, which is safer to use. The transparent setting of the lower box body makes it convenient to observe the amount of water in the water tank 12.

[0066] like Figure 8 and Figure 9 As shown, in the present application, the device base 1 includes a support base 111, a tray body 113 and a pressure ring body 112. The tray body 113 is restricted on the support base 111 by the pressure ring body 112. The concave bottom surface of the tray body 113 is a food loading table, and the pressure ring body 112 is sealed with the upturned edge of the tray body 113 forming a guide vertical surface 1133 through a plug-in structure, and the pressure ring body 112 and the tray body 113 are sealed by setting a sealing silicone ring or gluing to improve the sealing performance and prevent steam from entering the device base 1 and damaging the electrical components and affecting the service life. The pressure ring body 112 has a limiting flange structure that cooperates with the upper cover 2 to prevent the upper cover 2 from moving and causing instability, thereby enhancing the stability of the device during use.

[0067] In order to ensure a reliable connection between the pressure ring body 112 and the tray body 113, an annular platform portion 1136 is provided between the guide vertical surface 1133 and the annular inclined guide portion 1132. The pressure ring body 112 and the annular platform portion 1136 are fitted face to face, which improves the sealing effect and increases the strength of the edge of the tray body 113 to prevent deformation.

[0068] like Figure 10 、 Figure 11 、 Figure 12 and Figure 13 As shown, the steam generating device 15 comprises a mounting base 151 for connecting to the base body 11. The mounting base 151 is provided with a steam generating water pipe 153 and a heating device 154 for heating water in the steam generating water pipe 153 to generate steam.

[0069] Since the generated water vapor is often mixed with a small amount of liquid water, the mixing of liquid water will affect the dryness and temperature of the steam, thereby reducing the heating efficiency; liquid water will quickly turn into condensed water when it enters the heating chamber, and long-term contact between condensed water and food may cause the food to be over-soaked, affecting the taste.

[0070] In order to overcome the problems caused by the mixing of water vapor and liquid water for heating, the top of the mounting base 151 of the steam generating device in this application is provided with a vapor-liquid separation chamber 1511 and a steam outlet nozzle 1512 connected to the vapor-liquid separation chamber 1511. The steam outlet nozzle 1512 is used to discharge the separated pure steam into the steam boiler. The outlet end 1531 of the steam generating water pipe 153 is located in the vapor-liquid separation chamber 1511, and the outlet end 1531 is indirectly connected to the steam outlet nozzle 1512 through the vapor-liquid separation chamber 1511. The inlet end of the steam generating water pipe 153 is connected to the liquid supply device. This technical solution uses the aforementioned method to prevent direct communication between outlet end 1531 and steam outlet nozzle 1512. Instead, it establishes indirect communication via vapor-liquid separation chamber 1511, located between outlet end 1531 and steam outlet nozzle 1512. As the vapor-liquid mixture enters vapor-liquid separation chamber 1511, the difference in specific gravity between vapor and liquid causes liquid water to fall directly to the bottom of vapor-liquid separation chamber 1511 for temporary storage, ensuring that the steam supplied to the steam boiler is pure and free of liquid water. Through the physical design, water vapor and liquid water are effectively separated within vapor-liquid separation chamber 1511.

[0071] In this embodiment, in order to achieve a better vapor-liquid separation effect, a method is adopted. This method is to allow the vapor-liquid mixture to have sufficient separation time in the vapor-liquid separation chamber 1511. Specifically, in this embodiment, preferably, a labyrinth channel is formed in the vapor-liquid separation chamber 1511 using one or more partitions 1514 to extend the flow path of the vapor-liquid mixture. The labyrinth channel can change the flow direction of water vapor and increase the contact area and contact time between the labyrinth channel and liquid water. In this way, it is possible to prevent the steam entering the vapor-liquid separation chamber 1511 from being quickly ejected from the steam outlet 1512. Thus, a good vapor-liquid separation effect is achieved by using a physical structure, with a vapor-liquid separation efficiency of >99.8% and a residual amount of liquid water of <0.1g / m³.

[0072] In actual use, the labyrinth channel can guide the steam flow to move along the radial cross section, or along the axial direction, or in a combination of the two.

[0073] In this embodiment, preferably, the labyrinth channel is designed to guide the steam flow along the radial cross-section, and the outlet direction of the outlet end 1531 is perpendicular to the steam flow path of the labyrinth channel. Specifically, the partition 1514 has a C-shaped structure, and the axis of the partition 1514 is parallel to the axis of the cylindrical vapor-liquid separation chamber 1511. Side circulation channels are formed between adjacent partitions 1514. In order to make the circulation channel for the vapor-liquid mixing longest, the outlet end 1531 of the steam generating water pipe 153 is located in the central area of the labyrinth channel. In order to enable the steam flow to quickly enter the labyrinth channel, an upper circulation channel is provided on the top of the partition 1514 near the center of the labyrinth channel for the steam flow to quickly enter the labyrinth channel. The upper circulation channel and the corresponding side circulation channel cooperate with each other to ensure that the steam flow can quickly and smoothly enter the labyrinth channel.

[0074] Other embodiments that can form a maze channel are: by setting a plurality of spaced-apart guide vanes in the vapor-liquid separation chamber 1511, a flow channel is formed by utilizing the gap between the guide vanes and the inner wall of the vapor-liquid separation chamber 1511, and an S-shaped maze channel is formed between adjacent guide vanes. The S-shaped maze channel can make the steam flow move radially or axially upward according to the setting direction of the guide vanes.

[0075] In order to prevent the partition 1514 and / or the guide plate from rusting after long-term use, the surfaces of the partition 1514 and the guide plate can be coated with a hydrophobic coating. The coating material is polytetrafluoroethylene or silicon carbide ceramic material, and the surface roughness Ra is less than or equal to 0.8 μm.

[0076] To facilitate the use of vapor-liquid separation chamber 1511, the top of mounting base 151 is provided with a concave cavity opening upward. An end cap 152 is positioned at the opening of the concave cavity, thereby forming a sealed vapor-liquid separation chamber 1511. The corresponding partition 1514 abuts against end cap 152, providing more reliable flow guidance for the vapor flow. End cap 152 tightly seals the opening of vapor-liquid separation chamber 1511, effectively preventing steam leakage and the ingress of foreign matter. This design also facilitates cleaning of vapor-liquid separation chamber 1511, maintaining its cleanliness even after prolonged use.

[0077] The arrangement of the concave cavity with the opening upward facilitates the processing of the maze channel.

[0078] In order to facilitate the later maintenance and cleaning of the vapor-liquid separation chamber 1511, the end cover 152 is fixed to the opening of the cavity by bolts or buckles to form a detachable connection, making the disassembly and assembly process of the end cover 152 convenient.

[0079] In this embodiment, to ensure that the water entering the steam generating water pipe 153 is fully heated and vaporized, the steam generating water pipe 153 is designed in a vertical spiral shape. The outlet end 1531 of the steam generating water pipe 153 extends axially into the vapor-liquid separation chamber 1511. The heating device 154 heats the steam generating water pipe 153 and is positioned within the cylindrical inner cavity of the steam generating water pipe 153. This device concentrates the heat within the cylindrical inner cavity of the steam generating water pipe 153 as much as possible, ensuring efficient heat utilization and rapidly heating the water to a boiling state, thereby generating steam.

[0080] In actual use, the heating device 154 surrounds the vertically spiral steam-generating water pipe 153, heating water to boiling, thereby generating steam. Simultaneously, the outlet end 1531 of the steam-generating water pipe 153 extends axially into the vapor-liquid separation chamber 1511. The spiral heating pipe 154 and the vapor-liquid separation chamber 1511 form a thermal feedback loop, increasing secondary vaporization efficiency by 25%.

[0081] Furthermore, in actual use, the steam-generating water pipe 153 can also be arranged in a planar spiral. Heating devices 154 are positioned above and below the spiral path of the steam-generating water pipe 153 to ensure that the water is fully contacted and heated to a boiling state during its flow, thereby generating steam. The outlet end 1531 of the steam-generating water pipe 153 extends axially into the vapor-liquid separation chamber 1511. This arrangement ensures that the water is fully contacted with the heating device 154 during its flow, ensuring complete boiling of the water and efficient steam generation.

[0082] In this embodiment, the heating device 154 is preferably a spiral heating tube, the positive and negative electrodes of which are both passed through the bottom of the mounting base body 151 .

[0083] The heating module can also be a PTC ceramic heater or electromagnetic induction heater with a heating power of 800-2000W and an anti-corrosion coating on the surface of the heating module. When using a PTC ceramic heater, the PTC self-limiting heating element will automatically stop the heating module by setting an automatic heating limit set in the control system when an abnormal water level in the steam generating water pipe 10 is detected.

[0084] To ensure that the heat generated by the heating device 154 is fully absorbed by the steam generating water pipe 153, two spiral channels 1513 are provided within the mounting base 151 for mounting the steam generating water pipe 153 and the heating device 154. The pitch of the spiral channels 1513 matches the spiral structure of the steam generating water pipe 153 and the heating device 154. The two spiral channels 1513 are tightly wound, and their axes coincide, ensuring that the steam generating water pipe 153 is exposed to the maximum amount of heat during the heating process.

[0085] In the present application, the mounting base 151 is made of a heat-conducting material, and the steam-generating water pipe 153 and the heating device 154 are in close contact with the wall of the corresponding spiral channel 1513. The contact heat transfer between the heating device 154 and the mounting base 151 is used to heat the steam-generating water pipe 153 evenly while allowing the heat to be transferred through the mounting base 151 to the vapor-liquid separation chamber 1511. This ensures complete boiling of the water and efficient generation of steam. At the same time, this design can also heat and insulate the vapor-liquid mixture temporarily stored in the vapor-liquid separation chamber 1511, allowing the liquid water entering the vapor-liquid separation chamber 1511 to continue to be heated and vaporized, thereby improving the efficiency and stability of the entire system. At the same time, this design can also prevent condensed water from continuing to be stored in the vapor-liquid separation chamber 1511 after shutdown, ensuring that the interior of the chamber remains dry and effectively preventing the growth of bacteria and microorganisms. In summary, this design not only improves the operating efficiency of the system, but also enhances the long-term stability and reliability of the equipment, reducing maintenance costs and downtime risks.

[0086] In the present invention, a one-way valve is installed at the steam outlet 1512 to prevent steam from flowing back into the vapor-liquid separation chamber 1511 and causing accumulation of condensed water, which is prone to breed bacteria and affect human health.

[0087] In this embodiment, the steam generating water pipe 153 and the heating device 154 are both located below the vapor-liquid separation chamber 1511. The heating device 154 extends to the bottom area of the vapor-liquid separation chamber 1511, providing secondary heating and vaporization of the liquid water within the chamber. The steam generating water pipe 153 is made of high-temperature resistant materials to ensure stable operation in high-temperature environments. The heating device 154 is equipped with a high-efficiency electric heating element, which can quickly heat water to a boil in a short time. This design effectively reduces the horizontal footprint of the steam generating device, making the entire steam cooking device more compact and compact.

[0088] The core innovation of the dual-mode condensate treatment system involved in this invention lies in the synergistic effect of physical diversion and thermal evaporation and mechanical separation to achieve efficient collection, rapid evaporation and zero residual discharge of condensate. Its working principle can be divided into the following two parts: 1. Physical diversion-thermal evaporation mode (food carrying table) Condensate collection and diversion Annular inclined guide part: Through the 5°-15° inclination angle design, the condensed water generated during the cooking process flows along the inclined surface toward the central flat bottom (a concave cavity that sinks 3-8mm).

[0089] Guide groove structure: The 3-8mm wide guide grooves formed by adjacent supporting bosses (distributed in a petal shape) accelerate the lateral collection of condensed water. At the same time, the depth is designed to decrease from the center to the edge (such as 5mm deep in the center and 1mm at the edge) to prevent the condensed water from overflowing in the opposite direction.

[0090] Closed-loop evaporation system Precise temperature control by electric heating element: The electric heating element (such as PTC heater) located below the central flat bottom continuously heats the condensed water, causing it to vaporize quickly.

[0091] Water storage grooves enhance evaporation: Water storage grooves (such as semicircular or strip grooves) on the bottom surface of the central flat bottom increase the contact area between condensed water and the heating element, shortening the evaporation time.

[0092] Dynamic balance mechanism: The temperature of the central flat bottom is monitored in real time by a temperature sensor, and the heating power is controlled to ensure a dynamic balance between the evaporation rate and the generation rate of condensed water to avoid water accumulation.

[0093] 2. Mechanical separation mode (steam generator) Vapor-liquid separation chamber design Labyrinthine Delayed Separation: C-shaped baffles (or other special-shaped baffles) are installed in the vapor-liquid separation chamber to form a serpentine or spiral labyrinthine channel. The steam and condensate mixture is forced to circumvent the channel, and gravity causes the liquid water to settle to the bottom and the steam to rise to the top.

[0094] Vertical path design: The outlet direction of the steam generating water pipe is perpendicular to the flow direction of the labyrinth channel, which increases the disturbance of the vapor-liquid mixture and improves the separation efficiency.

[0095] Secondary heating vaporization The heating device extends to the separation chamber: The spiral heating tube (such as 800-2000W electric heating wire) not only heats the water in the steam generating water pipe, but also extends to the bottom of the vapor-liquid separation chamber to perform secondary heating and vaporization on the residual trace liquid water to ensure that the outlet steam dryness is ≥95%.

[0096] Spiral channel synergistic heat transfer: The steam generating water pipe and the spiral channel of the heating device are installed coaxially, and heat is conducted through the metal wall to form a uniform heating field, avoiding local overheating or condensation.

[0097] 3. Bimodal Synergy Effect Closed-loop dehumidification circuit: The physical diversion mode concentrates the condensed water to the central flat bottom, where it is quickly evaporated through electric heating; the mechanical separation mode performs secondary purification on the steam output by the steam generator, doubly ensuring zero condensed water residue.

[0098] Anti-interference design: diversion facade (3-10mm high): prevents steam condensation from flowing back to the surface of food; sealing structure: the silicone sealing ring between the pressure ring and the tray body prevents steam leakage, maintains negative pressure in the cavity, and accelerates the return of condensation water.

[0099] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will appreciate that various modifications and variations of the present embodiment are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A steam cooking device, characterized in that: include: Dual-mode condensate treatment system, including: The food loading table has: A central flat bottom (1131) for storing condensed water and supporting the center of the bottom of the food; An annular inclined guide portion (1132) is connected to the outer ring of the central flat bottom, and has a plurality of support boss portions (1134) distributed at intervals on its surface, with guide grooves (1135) formed between adjacent support boss portions; A diversion facade (1133) is connected to the outer edge of the annular inclined diversion portion and extends upward; An electric heating body (1137) is provided below the central flat bottom and is used for heating condensed water; A steam generator (15), comprising: The mounting base (151) has a vapor-liquid separation chamber (1511) and a vapor outlet nozzle (1512); A spiral steam generating water pipe (153), the outlet end (1531) of which is located in the vapor-liquid separation chamber; A heating device (154) is placed in the inner cavity of the steam generating water pipe and below the vapor-liquid separation cavity; A labyrinth channel is provided in the vapor-liquid separation chamber (1511), and the outlet end of the steam generating water pipe is perpendicular to the path of the labyrinth channel, forming a closed-loop dehumidification circuit to reduce residual condensed water.

2. The steam cooking device according to claim 1, characterized in that The inclination angle of the annular inclined surface guide portion (1132) is 5°-15°.

3. The steam cooking device according to claim 1, characterized in that The supporting boss portions (1134) are distributed in a petal-like shape.

4. The steam cooking device according to claim 1, characterized in that The central flat bottom (1131) is formed by a concave cavity that is sunken 3-8 mm.

5. The steam cooking device according to claim 1, characterized in that The width of the guide groove (1135) is 3-8 mm, and the depth gradually decreases from the center to the edge.

6. The steam cooking device according to claim 1, characterized in that The height of the diversion facade (1133) is 3-10 mm.

7. The steam cooking device according to claim 1, characterized in that At least one C-shaped partition (1514) is provided in the vapor-liquid separation chamber to form a labyrinthine channel, and the outlet end of the steam generating water pipe is perpendicular to the path of the labyrinthine channel.

8. The steam cooking device according to claim 7, characterized in that: An upper circulation channel is provided on the top of the partition (1514), and side circulation channels are formed between adjacent partitions. The outlet end of the steam generating water pipe is located in the central area of the labyrinth channel.

9. The steam cooking device according to claim 7, characterized in that: The heating device (154) is a spiral heating tube, which is coaxially installed with the steam generating water tube (153) through a spiral channel (1513), and the heating device extends to the bottom of the vapor-liquid separation chamber.

10. The steam cooking device according to claim 7, characterized in that The steam generating water pipe (153) and the heating device (154) are both located below the vapor-liquid separation chamber (1511), and the heating device performs secondary heating and vaporization on the liquid water in the vapor-liquid separation chamber.

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