A steam heating device and cooking apparatus

Abstract

This application relates to the field of household appliance technology, and provides a steam heating device and cooking equipment. The steam heating device includes a housing, an annular shell, a first heater, and a second heater. The housing forms a water storage cavity; the annular shell is disposed in the water storage cavity, and a first heating cavity is defined between the outer wall of the annular shell and the cavity wall of the water storage cavity. The annular shell forms a second heating cavity and a connecting hole, the connecting hole connecting the first heating cavity and the second heating cavity; the first heater is disposed in the first heating cavity and is used to heat water into saturated steam; the second heater is disposed in the second heating cavity and is used to heat the saturated steam into supersaturated steam. The steam heating device and cooking equipment provided by this application can improve cooking efficiency.

Description

Technical Field

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

[0002] Cooking equipment such as steam ovens use steam to heat food. The higher the temperature of the steam, the higher the temperature that the cavity can reach, which can shorten the cooking time.

[0003] The steam heating temperature in the relevant technologies is insufficient, resulting in relatively low cooking efficiency. Summary of the Invention

[0004] In view of this, the embodiments of this application aim to provide a steam heating device and cooking equipment that can improve cooking efficiency.

[0005] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0006] One embodiment of this application discloses a steam heating device, including:

[0007] The shell has a water storage cavity;

[0008] An annular shell is disposed in the water storage cavity. A first heating cavity is defined between the outer wall of the annular shell and the cavity wall of the water storage cavity. The annular shell has a second heating cavity and a connecting hole, and the connecting hole connects the first heating cavity and the second heating cavity.

[0009] A first heater and a second heater are provided. The first heater is disposed in the first heating chamber and is used to heat water into saturated steam. The second heater is disposed in the second heating chamber and is used to heat the saturated steam into supersaturated steam.

[0010] In one embodiment, the housing includes a body and a cover. The body has a mounting groove and a mounting opening communicating with the mounting groove. The cover covers the mounting opening to jointly define the water storage cavity. The cover has a steam outlet communicating with the second heating cavity. The cover is configured to allow the steam outlet to communicate with or be disconnected from the first heating cavity.

[0011] In one embodiment, the cover includes a connecting portion and an adjusting portion, the connecting portion is connected around the outside of the adjusting portion, the connecting portion covers the mounting opening, the adjusting portion forms the steam outlet, and the adjusting portion has a first state and a second state;

[0012] In the first state, the adjustment part is spaced apart from the outer surface of the annular shell, so that the first heating chamber is in communication with the steam outlet;

[0013] In the second state, the adjustment part overlaps the outer surface of the annular shell, thereby cutting off the first heating chamber from the steam outlet.

[0014] In one embodiment, the adjustment portion is pulled and pressed to switch it between the first state and the second state.

[0015] In one embodiment, the second heating chamber includes a second primary heating chamber and a second secondary heating chamber that are separated from each other. The second primary heating chamber is arranged around the outside of the second secondary heating chamber. The second primary heating chamber and the second secondary heating chamber are connected through a through-hole located between them. The second primary heating chamber is connected to the connecting hole. The second heater includes a second primary heater and a second secondary heater. The second primary heater is disposed in the second primary heating chamber, and the second secondary heater is disposed in the second secondary heating chamber.

[0016] In one embodiment, the annular shell includes a first surrounding portion and a second surrounding portion. The first surrounding portion forms a second heating cavity and a communicating hole. The second surrounding portion is disposed in the second heating cavity to define a second primary heating cavity and a second secondary heating cavity in the inward and outward directions. The second surrounding portion forms the through opening. A second primary air passage is defined between the second primary heater and the outer sidewall of the second surrounding portion. A second secondary air passage is defined between the second secondary heater and the inner sidewall of the second surrounding portion. The second primary air passage communicates with the second primary heating cavity. The through opening communicates with the second primary air passage and the second secondary air passage.

[0017] One embodiment of this application discloses a cooking device, including a housing and a steam heating device as described in any of the above embodiments. A cooking cavity is formed in the housing, the steam heating device is disposed in the cooking cavity, and a steam outlet is formed in the housing, the steam outlet connecting the cooking cavity and the water storage cavity.

[0018] In one embodiment, the cooking device includes a water pipe, one end of which is a water inlet and the other end of which is a water outlet. The water outlet is connected to the water storage chamber, and the section of the water pipe having the water inlet is disposed on the outside of the housing.

[0019] In one embodiment, the water inlet is located at the top of the housing, and the steam heating device is disposed on the bottom wall of the cooking cavity.

[0020] In one embodiment, the housing has a vent communicating with the cooking cavity, the vent being disposed on the side of the housing along a first direction, the first direction intersecting the vertical direction.

[0021] This application discloses a steam heating device and cooking equipment. By reheating saturated steam, on the one hand, the steam temperature can be increased, thereby reducing water mist mixed in the steam and providing drier supersaturated steam to reduce condensation. On the other hand, heating food with supersaturated steam can reduce heating time and improve cooking efficiency. Furthermore, compared to directly setting a reheating structure at the outlet of the steam heating device, this application defines a first heating chamber by setting an annular shell in the water storage cavity. The annular shell forms a second heating chamber and a connecting hole, which connects the first and second heating chambers. In other words, this application first heats water into saturated steam at the periphery, and the saturated steam can enter the second heating chamber located in the middle through the connecting hole to be heated into supersaturated steam by the second heater. This eliminates the need for a separate reheating structure at the outlet of the steam heating device, thus reducing costs, improving economy, reducing space occupation, and increasing space utilization. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a cooking device provided in an embodiment of this application;

[0023] Figure 2 for Figure 1 A structural diagram from another perspective;

[0024] Figure 3 A schematic diagram of the steam heating device, housing, water pipe, and base provided in the embodiments of this application;

[0025] Figure 4 for Figure 3 A cross-sectional diagram;

[0026] Figure 5 for Figure 4 Enlarged view of point C in the image;

[0027] Figure 6 A cross-sectional schematic diagram of the steam heating device, housing, water pipe, and base provided in the embodiments of this application;

[0028] Figure 7 for Figure 6 Enlarged view of point D in the image.

[0029] Explanation of reference numerals in the attached figures

[0030] 100. Cooking equipment; 1. Steam heating device; 11. Shell; 11a. Water storage chamber; 11a1. First heating chamber; 11a2. Second heating chamber; 11a21. Second primary heating chamber; 11a22. Secondary heating chamber; 11a23. Second primary air passage; 11a24. Secondary air passage; 111. Body; 111a. Mounting groove; 111b. Mounting port; 112. Cover; 112a. Steam outlet; 1121. Connecting part; 1122. Adjusting part; 12. Ring shell; 12a. Communicating hole; 121 1. First surrounding part; 121a. Connection port; 122. Second surrounding part; 122a. Through port; 13. First heater; 14. Second heater; 141. Second primary heater; 142. Second secondary heater; 2. Cabinet; 2a. Cooking cavity; 2b. Loading / unloading port; 2c. Air vent; 2d. Shelf; 21. Front panel; 22. Rear panel; 23. Enclosure; 3. Door; 3a. Viewing window; 4. Water pipe; 4a. Water inlet; 5. Outer cover; 5a. Mounting cavity; 6. Base; A. First state; B. Second state. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0032] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. The terms "first," "second," etc., used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly including at least one feature. In the description of the embodiments of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] To better understand the steam heating device 1 provided in this application, the cooking equipment 100 will be described first.

[0034] One embodiment of this application provides a cooking device 100, please refer to... Figures 1 to 7 The cooking device 100 includes a housing 2 and a steam heating device 1 in any of the following embodiments. A cooking cavity 2a is formed inside the housing 2, and the steam heating device 1 is disposed in the cooking cavity 2a. A steam outlet 112a is formed in the housing 11, and the steam outlet 112a communicates with the cooking cavity 2a and the water storage cavity 11a.

[0035] The steam heating device 1 is used to heat the water in the water storage chamber 11a into steam, and then the steam can enter the cooking chamber 2a through the steam outlet 112a to heat the food in the cooking chamber 2a.

[0036] For example, cooking equipment 100 can be a steam oven, a steam oven, or a microwave steam oven, etc., that has a steaming function.

[0037] Another embodiment of this application provides a steam heating device 1, please refer to... Figures 1 to 7 The system includes a housing 11, an annular shell 12, a first heater 13, and a second heater 14. The housing 11 forms a water storage cavity 11a. The annular shell 12 is disposed within the water storage cavity 11a, and its outer wall defines a first heating cavity 11a1 between itself and the cavity wall of the water storage cavity 11a. The annular shell 12 forms a second heating cavity 11a2 and a connecting hole 12a, which connects the first heating cavity 11a1 and the second heating cavity 11a2. The first heater 13 is disposed within the first heating cavity 11a1 and is used to heat water into saturated steam. The second heater 14 is disposed within the second heating cavity 11a2 and is used to heat the saturated steam into supersaturated steam.

[0038] It should be noted that saturated steam has a temperature of approximately 100℃, while supersaturated steam has a temperature generally above 100℃. When heating food with saturated steam, the heating process is relatively gentle, and the food is heated more evenly, but the heating speed is slower. This is suitable for cooking situations where high temperature control is required. Additionally, saturated steam may contain droplets or mist, which may affect the texture of the food. Supersaturated steam, on the other hand, heats food rapidly and efficiently, quickly locking in the juices and removing salt and oil. This is suitable for situations requiring rapid heating, offering high cooking efficiency and preserving the texture of the food.

[0039] The steam heating device 1 provided in this application embodiment stores water to be heated by forming a water storage cavity 11a inside the housing 11. An annular shell 12 is disposed in the water storage cavity 11a, defining a first heating cavity 11a1 between the outer wall of the annular shell 12 and the cavity wall of the water storage cavity 11a. The annular shell 12 forms a second heating cavity 11a2 and a connecting hole 12a, which connects the first heating cavity 11a1 and the second heating cavity 11a2. A first heater 13 is disposed in the first heating cavity 11a1, and a second heater 14 is disposed in the second heating cavity 11a2. The first heater 13 heats the water in the first heating cavity 11a1 into saturated steam. The saturated steam can enter the second heating cavity 11a2 through the connecting hole 12a and is then heated into supersaturated steam by the second heater 14. This reheating of the saturated steam increases the steam temperature, thereby reducing water mist mixed in the steam and providing drier supersaturated steam, thus reducing steam condensation. On the one hand, heating food with supersaturated steam can reduce heating time and improve cooking efficiency. On the other hand, compared with setting a reheating structure directly at the outlet of the steam heating device 1, this application defines the first heating chamber 11a1 by setting the annular shell 12 in the water storage chamber 11a. The annular shell 12 forms a second heating chamber 11a2 and a connecting hole 12a, which connects the first heating chamber 11a1 and the second heating chamber 11a2. In other words, the method adopted in this application is to first heat the water into saturated steam in the periphery. The saturated steam can enter the second heating chamber 11a2 in the middle through the connecting hole 12a and be heated into supersaturated steam by the second heater 14. This eliminates the need to add a separate reheating structure at the outlet of the steam heating device 1 of this application. This not only reduces costs and improves economy, but also reduces space occupation and improves space utilization.

[0040] Based on the advantages of the aforementioned steam heating device 1, the cooking equipment 100 provided in this application also has the advantages of high cooking efficiency and good economy.

[0041] For example, in one embodiment, the housing 2 can be made of stainless steel, which can reduce moisture corrosion of the housing 2 and improve the service life of the housing 2.

[0042] For example, in one embodiment, the shape of the box 2 is not limited. For example, the shape of the box 2 can be a cuboid, a cube, or other shapes.

[0043] For example, in one embodiment, the first direction may be the front-to-back direction of the cooking device 100, the second direction may be the left-to-right direction of the cooking device 100, and the third direction may be the up-down direction of the cooking device 100.

[0044] It should be noted that "up" refers to the direction towards the ceiling, and "down" is the opposite of "up." The up-down direction, the first direction, and the second direction are perpendicular to each other, together forming a three-dimensional vertical coordinate system.

[0045] In one exemplary embodiment, Figure 3 In this context, R1 can be the first direction, R2 can be the second direction, and R3 can be the third direction.

[0046] In one embodiment, please refer to Figures 1 to 3 The housing 2 includes a front panel 21, a rear panel 22, and a surrounding panel 23. The surrounding panel 23 is perforated on both sides along the front-rear direction to form a communication opening and a loading / unloading opening 2b, making the shape of the surrounding panel 23 approximately U-shaped. The rear panel 22 covers the communication opening, and the front panel 21 is disposed around the periphery of the loading / unloading opening 2b to define the cooking cavity 2a. In some embodiments, the cooking device 100 also includes a door 3, which is rotatably disposed on the front panel 21 to rotate open and close the loading / unloading opening 2b.

[0047] For example, in one embodiment, the door 3 can be opened and closed by flipping the door 3 upward to open the retrieval port 2b, and flipping the door 3 downward to close the retrieval port 2b.

[0048] As an example, in one embodiment, please refer to Figure 1 A viewing window 3a is formed on the door 3. Through the viewing window 3a, the internal space of the box 2 can be seen through the loading and unloading port 2b to observe the cooking status of the food.

[0049] In one embodiment, please refer to Figure 3 , Figure 4 and Figure 6 The cooking equipment 100 includes a water pipe 4, one end of which is a water inlet 4a and the other end of which is a water outlet. The water outlet is connected to the water storage chamber 11a. The section of the water pipe 4 with the water inlet 4a is located on the outside of the housing 2.

[0050] In this way, by placing the section of the water pipe 4 with the inlet 4a on the outside of the housing 2, on the one hand, the space occupied by the cooking cavity 2a can be reduced, making the overall design of the cooking equipment 100 more compact and lightweight; on the other hand, placing the water pipe 4 on the outside of the housing 2 facilitates the inspection and maintenance of the water pipe 4, thereby reducing maintenance difficulty and cost; furthermore, when using the water pipe 4 to replenish water to the water storage cavity 11a, the external water pipe 4 allows users to replenish water more flexibly, such as directly connecting the inlet 4a of the water pipe 4 to a faucet or using a kettle to introduce water into the inlet 4a, which is relatively simple to operate; and on the other hand, the external water pipe 4 can reduce the risk of water leakage to a certain extent.

[0051] In one embodiment, please refer to Figure 3 , Figure 4 and Figure 6 The water inlet 4a is located at the top of the box 2, and the steam heating device 1 is installed on the bottom wall of the cooking cavity 2a.

[0052] Here, after water is poured into the inlet 4a, the water can flow downwards along the inner wall of the guide pipe 4 under its own gravity until it reaches the outlet and enters the water storage chamber 11a. In this way, on the one hand, the situation of water flowing back out of the inlet 4a can be reduced; on the other hand, the water flows by its own gravity, so that it can flow to the outlet without additional pumping equipment or power, and then flow back to the water storage chamber 11a. This can reduce energy consumption and simplify the structure of the cooking equipment 100, thereby reducing the maintenance and manufacturing costs of the cooking equipment 100, which is economical.

[0053] In one embodiment, please refer to Figure 3 The housing 2 has an air outlet 2c that communicates with the cooking cavity 2a. The air outlet 2c is located on the side of the housing 2 along a first direction, which intersects with the vertical direction.

[0054] For example, the air outlet 2c can be located on the rear side of the housing 2.

[0055] In this way, by setting the air outlet on the side of the box 2 along the first direction, on the one hand, the steam after heat exchange with the food can be effectively discharged, reducing the formation of vortices at the top and bottom of the airflow; on the other hand, it can reduce the interference of the airflow discharged from the air outlet 2c with obstacles above or below the box 2, thus reducing the situation of poor airflow.

[0056] In one embodiment, please refer to Figures 1 to 3 The cooking device 100 includes an outer cover 5, which wraps around the outside of the housing 2 to define an installation cavity 5a in the inward and outward directions with the housing 2, and a water pipe 4 is disposed in the installation cavity 5a.

[0057] For example, the outer casing may be wrapped around the sides and top of the housing 2 along the first direction. The mounting cavity 5a may be formed on the left side of the housing 2, and a section of the water pipe 4 having an inlet 4a is disposed in the mounting cavity 5a.

[0058] Here, by setting the outer cover 5, on the one hand, the mounting cavity 5a can protect the water pipe 4, reduce the damage to the water pipe 4 caused by external factors such as dust and debris, so as to improve the service life of the water pipe 4, and further reduce the heat loss inside the cooking equipment 100.

[0059] As an example, in one embodiment, please refer to Figures 1 to 3 The cooking device 100 includes a base 6, which is disposed at the bottom of the housing 2 to protect the bottom of the housing 2.

[0060] As an example, in one embodiment, please refer to Figure 3 The cooking cavity 2a has a shelf 2d formed on the cavity wall along the second direction. The cooking device 100 includes a steaming tray. The steaming tray can be placed on the shelf 2d on each side of the cavity wall along the second direction, which can provide a place for food.

[0061] In one embodiment, please refer to Figures 4 to 7 The housing 11 includes a body 111 and a cover 112. The body 111 has a mounting groove 111a and a mounting opening 111b communicating with the mounting groove 111a. The cover 112 covers the mounting opening 111b to jointly define the water storage chamber 11a. The cover 112 has a steam outlet 112a communicating with the second heating chamber 11a2. The cover 112 is configured to allow the steam outlet 112a to communicate with or be cut off from the first heating chamber 11a1.

[0062] For example, the main body 111 can be disposed on the bottom wall of the cooking cavity 2a, and the bottom wall of the cooking cavity 2a has a downwardly recessed groove. The mounting groove 111a can be formed by a portion of the main body 111 being downwardly recessed, and the top of the mounting groove 111a has a mounting opening 111b. The mounting groove 111a can be placed in the groove. The cover 112 is placed on the mounting opening 111b to jointly define the water storage cavity 11a. The steam outlet 112a on the cover 112 is connected to the cooking cavity 2a and is connected to the second heating cavity 11a2, so that the supersaturated steam flowing out from the second heating cavity 11a2 can heat the food in the cooking cavity 2a. The cover 112 is configured to connect or disconnect the steam outlet 112a from the first heating chamber 11a1. In other words, by operating the cover 112, the steam outlet 112a can be connected to the first heating chamber 11a1. In this way, after water is heated to saturated steam in the first heating chamber 11a1 by the first heater 13, a portion of the saturated steam can enter the second heating chamber 11a2 through the connecting hole 12a, while the remaining saturated steam can be directly discharged from the steam outlet 112a to heat the food, thus meeting different cooking needs and offering good flexibility. Alternatively, the cover 112 can be operated to disconnect the steam outlet 112a from the first heating chamber 11a1. In this way, after water is heated to saturated steam in the first heating chamber 11a1 by the first heater 13, almost all of it enters the second heating chamber 11a2 through the connecting hole 12a and is then heated to supersaturated steam by the second heater 14 to heat the food, resulting in faster heating and higher cooking efficiency.

[0063] For example, in one embodiment, the shape of the cover 112 is not limited. For example, the projected shape of the cover 112 along the vertical direction can be circular or square, depending on the installation opening 111b.

[0064] In one embodiment, please refer to Figures 4 to 7 The first heater 13 is disposed on the bottom wall of the mounting groove 111a. This allows for better heating of the water in the first heating chamber 11a1, thereby improving the efficiency of saturated steam generation.

[0065] In one embodiment, for example, the shape of the first heater 13 is not limited; for example, the first heater 13 may be disc-shaped.

[0066] In one embodiment, please refer to Figures 4 to 7 The steam heating device 1 includes a cover 112, an annular shell 12, a first heater 13, and a second heater 14. The cover 112 can cover the groove to form a water storage cavity 11a. The annular shell 12 is disposed in the water storage cavity 11a, and the outer wall of the annular shell 12 defines a first heating cavity 11a1 between the cavity wall of the annular shell 12 and the cavity wall of the water storage cavity 11a. The annular shell 12 forms a second heating cavity 11a2 and a connecting hole 12a, which connects the first heating cavity 11a1 and the second heating cavity 11a2. The first heater 13 is disposed in the first heating cavity 11a1 and is used to heat water into saturated steam. The second heater 14 is disposed in the second heating cavity 11a2 and is used to heat the saturated steam into supersaturated steam.

[0067] In this way, the cover 112 can be placed on the groove at the bottom of the cooking device 100 to form a water storage cavity 11a, thereby further reducing the manufacturing cost of the steam heating device 1 and making it more economical.

[0068] In one embodiment, please refer to Figure 5 and Figure 7 The cover 112 includes a connecting portion 1121 and an adjusting portion 1122. The connecting portion 1121 surrounds the outside of the adjusting portion 1122 and covers the mounting opening 111b. The adjusting portion 1122 has a steam outlet 112a and has a first state A and a second state B. In the first state A, the adjusting portion 1122 is spaced apart from the outer surface of the annular shell 12, so that the first heating chamber 11a1 communicates with the steam outlet 112a. In the second state B, the adjusting portion 1122 overlaps the outer surface of the annular shell 12, so that the first heating chamber 11a1 is cut off from the steam outlet 112a.

[0069] For example, the switching between the first state A and the second state B can be achieved by moving the adjustment part 1122 separately to switch between the first state A and the second state B, or by moving the connecting part 1121 to drive the adjustment part 1122 to move to switch between the first state A and the second state B.

[0070] In this way, the adjustment part 1122 can be switched between the first state A and the second state B according to cooking needs. For example, when the adjustment part 1122 is adjusted to the first state A, the adjustment part 1122 will be spaced apart from the outer surface of the ring shell 12. In this way, the first heating chamber 11a1 can communicate with the steam outlet 112a through the gap, and then some saturated steam can flow from the first heating chamber 11a1 to the steam outlet 112a through the gap to heat the food. When the adjustment part 1122 is adjusted to the second state B, the adjustment part 1122 will overlap the outer wall of the ring shell 12 to block the gap between the adjustment part 1122 and the ring shell 12. In this way, the first heating chamber 11a1 cannot communicate with the steam outlet 112a through the gap. The saturated steam generated by the water in the first heating chamber 11a1 by the first heater 13 enters the second heating chamber 11a2 through the connecting hole 12a to be heated into supersaturated steam by the second heater 14, and then discharged through the steam outlet 112a to heat the food.

[0071] In one embodiment, please refer to Figure 5 and Figure 7 Pull and press the adjustment part 1122 to switch it between the first state A and the second state B.

[0072] For example, the adjusting part 1122 can be an upwardly convex thin-walled metal structure. By pressing the adjusting part 1122 downward toward the annular shell 12, the connection between the adjusting part 1122 and the connecting part 1121 is bent and deformed, switching to the flat state of the second state B. At this time, part of the annular shell 12 can pass through the steam outlet 112a, and the adjusting part 1122 will overlap with the outer surface of the annular shell 12. At this time, the steam outlet 112a is cut off from the first heating chamber 11a1, and saturated steam can almost only come out from the connecting hole 12. a enters the second heating chamber 11a2; when partial saturated steam is needed to heat the food, the adjusting part 1122 can be pulled upward away from the ring shell 12, so that the connection between the adjusting part 1122 and the connecting part 1121 is bent to deform and switch to the upward bulging state of the first state A. At this time, the steam outlet 112a will be located directly above the ring shell 12, and the ring shell 12 will be spaced apart from the adjusting part 1122. At this time, saturated steam can flow from the first heating chamber 11a1 to the steam outlet 112a through this gap.

[0073] In this way, by pulling and pressing the adjustment part 1122, it can be switched between the first state A and the second state B, which is simple to operate and easy to implement.

[0074] In one embodiment, please refer to Figure 5 and Figure 7The second heating chamber 11a2 includes a second primary heating chamber 11a21 and a second secondary heating chamber 11a22, which are separated from each other. The second primary heating chamber 11a21 is arranged around the outside of the second secondary heating chamber 11a22. The second primary heating chamber 11a21 and the second secondary heating chamber 11a22 are connected by a through-hole 122a located between them. The second primary heating chamber 11a21 is connected to a connecting hole 12a. The second heater 14 includes a second primary heater 141 and a second secondary heater 142. The second primary heater 141 is disposed in the second primary heating chamber 11a21, and the second secondary heater 142 is disposed in the second secondary heating chamber 11a22.

[0075] Here, the saturated steam in the first heating chamber 11a1 can enter the second primary heating chamber 11a21 through the connecting hole 12a, where it is first heated by the second primary heater 141. Then, it can enter the second stage heating chamber 11a22 through the through hole 122a, where it is heated a second time by the second stage heater 142 to become supersaturated steam. This staged heating method, which heats the saturated steam into supersaturated steam, helps to heat the steam more evenly, reducing local overheating or uneven heating. It also reduces the heating temperature and power requirements of each stage, thereby lessening the heating burden on the second heater 14 and extending the service life of the steam heating device 1. Furthermore, the staged heating method allows for precise control of the heating temperature and time at each stage, ensuring that the final temperature and state of the steam meet the preset requirements.

[0076] In one embodiment, please refer to Figure 5 and Figure 7 The annular shell 12 includes a first surrounding portion 121 and a second surrounding portion 122. The first surrounding portion 121 forms a second heating chamber 11a2 and a connecting hole 12a. The second surrounding portion 122 is disposed in the second heating chamber 11a2 to define a second primary heating chamber 11a21 and a second secondary heating chamber 11a22 in the inner and outer directions of the second heating chamber 11a2. The second surrounding portion 122 forms a through opening 122a. A second primary air passage 11a23 is defined between the second primary heater 141 and the outer side wall of the second surrounding portion 122. A second secondary air passage 11a24 is defined between the second secondary heater 142 and the inner side wall of the second surrounding portion 122. The second primary air passage 11a23 communicates with the second primary heating chamber 11a21. The through opening 122a communicates with the second primary air passage 11a23 and the second secondary air passage 11a24.

[0077] For example, one end of the first surrounding portion 121 can be connected to the bottom wall of the water storage chamber 11a, and the other end of the first surrounding portion 121 can extend upward and bend inward to form a connection port 121a for alignment and communication with the steam outlet 112a. The first surrounding portion has a communication hole 12a. One end of the second surrounding portion 122 can be connected to the periphery of the connection port 121a, and the other end of the second surrounding portion 122 can extend downward and connect to the bottom wall of the water storage chamber 11a. The second surrounding portion 122 has a through opening 122a. One end of the second primary heater 141 can be connected to the bottom wall of the second primary heating chamber 11a21, and the other end of the second primary heater 141 extends upward to form a connection port 121a. The second primary heater 142 is spaced apart from the top of the second primary heating chamber 11a21. One end of the second primary heater 142 can be connected to the bottom wall of the second primary heating chamber 11a22, and the other end of the second primary heater 142 can extend upward. The inner wall of the second primary heater 141 can form a second primary air passage 11a23 between the inner wall of the second surrounding part 122 and the outer wall of the second surrounding part 122. The outer wall of the second primary heater 142 can form a second primary air passage 11a24 between the inner wall of the second surrounding part 122. The second primary air passage 11a23 communicates with the second primary heating chamber 11a21, and the through port 122a connects the second primary air passage 11a23 and the second primary air passage 11a24.

[0078] Here, the saturated steam in the first heating chamber 11a1 can enter the second primary heating chamber 11a21 through the connecting hole 12a, and be heated for the first time by the second primary heater 141. The heated saturated steam can enter the second primary gas passage 11a23 through the through hole 122a into the second stage gas passage 11a24, and be heated for the second time by the second stage heater 142 to become supersaturated steam. That is to say, the route of the saturated steam is connecting hole 12a-second primary heating chamber 11a21-second primary gas passage 11a23-through hole 122a-second stage gas passage 11a24. In this way, the saturated steam flows along a specific route, which can effectively guide and control the flow direction and speed of the saturated steam, so as to ensure that the saturated steam flows uniformly around the second heater 14 and improve the heating efficiency of the saturated steam.

[0079] For example, in one embodiment, the first surrounding portion 121 and the second surrounding portion 122 may be integrally formed. This can improve the connection strength between the first surrounding portion 121 and the second surrounding portion 122.

[0080] As an example, in one embodiment, please refer to Figure 5 and Figure 7 A connecting hole 12a is formed in the first surrounding part 121 near the connection port 121a, and a through port 122a is formed in the second surrounding part 122 near the bottom wall of the water storage chamber 11a.

[0081] In this way, after the saturated steam is generated in the first heating chamber 11a1, it can first flow freely upward, and then enter the second primary heating chamber 11a21 through the upper connecting hole 12a to be heated by the second primary heater 141. Then the heated saturated steam can flow into the second primary air passage 11a23, and then flow downward along the second primary air passage 11a23 through the through hole 122a into the second secondary air passage 11a24, where it is heated by the second secondary heater 142. Finally, it flows upward out of the second secondary heating chamber 11a22 to heat the food.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit the application. Various modifications and variations can be made to this application by those skilled in the art. All modifications, equivalent substitutions, improvements, etc., within the spirit and principles of this application are included within the scope of protection of this application.

Claims

1. A steam heating device, characterized in that, include: The shell has a water storage cavity; An annular shell is disposed in the water storage cavity. A first heating cavity is defined between the outer wall of the annular shell and the cavity wall of the water storage cavity. The annular shell has a second heating cavity and a connecting hole, and the connecting hole connects the first heating cavity and the second heating cavity. A first heater and a second heater are provided. The first heater is disposed in the first heating chamber and is used to heat water into saturated steam. The second heater is disposed in the second heating chamber and is used to heat the saturated steam into supersaturated steam.

2. The steam heating device according to claim 1, characterized in that, The housing includes a body and a cover. The body has a mounting groove and a mounting opening communicating with the mounting groove. The cover is placed over the mounting opening to jointly define the water storage cavity. The cover has a steam outlet communicating with the second heating cavity. The cover is configured to allow the steam outlet to communicate with or be disconnected from the first heating cavity.

3. The steam heating device according to claim 2, characterized in that, The cover includes a connecting part and an adjusting part. The connecting part is connected to the outside of the adjusting part and covers the mounting opening. The adjusting part forms the steam outlet and has a first state and a second state. In the first state, the adjustment part is spaced apart from the outer surface of the annular shell, so that the first heating chamber is in communication with the steam outlet; In the second state, the adjustment part overlaps the outer surface of the annular shell, thereby cutting off the first heating chamber from the steam outlet.

4. The steam heating device according to claim 3, characterized in that, Pull and press the adjustment part to switch it between the first state and the second state.

5. The steam heating device according to claim 1, characterized in that, The second heating chamber includes a second primary heating chamber and a second stage heating chamber that are separated from each other. The second primary heating chamber is arranged around the outside of the second stage heating chamber. The second primary heating chamber and the second stage heating chamber are connected through a through-hole located between them. The second primary heating chamber is connected to the connecting hole. The second heater includes a second primary heater and a second stage heater. The second primary heater is disposed in the second primary heating chamber, and the second stage heater is disposed in the second stage heating chamber.

6. The steam heating device according to claim 5, characterized in that, The annular shell includes a first surrounding portion and a second surrounding portion. The first surrounding portion forms a second heating cavity and a communicating hole. The second surrounding portion is disposed in the second heating cavity to define a second primary heating cavity and a second secondary heating cavity in the inward and outward directions. The second surrounding portion forms a through opening. A second primary air passage is defined between the second primary heater and the outer side wall of the second surrounding portion. A second secondary air passage is defined between the second secondary heater and the inner side wall of the second surrounding portion. The second primary air passage communicates with the second primary heating cavity. The through opening communicates with the second primary air passage and the second secondary air passage.

7. A cooking device, characterized in that, The device includes a housing and a steam heating device as described in any one of claims 1 to 6, wherein a cooking cavity is formed within the housing, the steam heating device is disposed in the cooking cavity, and a steam outlet is formed in the housing, the steam outlet connecting the cooking cavity and the water storage cavity.

8. The cooking apparatus according to claim 7, characterized in that, The cooking device includes a water pipe, one end of which is a water inlet and the other end of which is a water outlet. The water outlet is connected to the water storage chamber, and the section of the water pipe with the water inlet is located on the outside of the housing.

9. The cooking apparatus according to claim 8, characterized in that, The water inlet is located at the top of the housing, and the steam heating device is installed on the bottom wall of the cooking cavity.

10. The cooking apparatus according to claim 7, characterized in that, The housing has an air vent that communicates with the cooking cavity. The air vent is located on the side of the housing along a first direction, which intersects with the vertical direction.

Images