Exhaust pipes and cooking equipment
By designing the water collection tank and drain hole structure of the exhaust pipe, the problem of condensate backflow was solved, enabling precise control of the temperature and humidity of the inner pot and improving the cooking effect of the steaming function.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-07-28
- Publication Date
- 2026-07-17
AI Technical Summary
When cooking appliances such as steam ovens and steam ovens are used for steaming, condensate flows back into the inner cavity through the exhaust pipe, causing inaccurate temperature and humidity control in the inner cavity and affecting the cooking effect.
Design an exhaust pipe including an upper pipe section, an upper connector, a lower connector, and a lower pipe section, a water collection tank, and a drain hole. Condensate is allowed to enter the water collection tank and be discharged by gravity, reducing backflow.
It effectively reduces condensate backflow, precisely controls the temperature and humidity inside the steamer, and improves the cooking effect in steam mode.
Smart Images
Figure CN224505233U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of kitchenware technology, and in particular to exhaust pipes and cooking equipment. Background Technology
[0002] When cooking appliances with steaming functions, such as steam ovens and steam ovens, are used for steaming, the water vapor inside the inner cavity is exhausted to the outside through the exhaust pipe connected to the inner cavity. However, as the water vapor passes through the exhaust pipe, condensation forms inside the pipe. This condensation, under the influence of gravity, flows back into the inner cavity through the exhaust pipe, causing changes in the temperature and humidity inside the inner cavity. This makes it difficult to accurately control the temperature and humidity inside the inner cavity, and consequently, it is detrimental to improving the cooking effect of the appliance in steam mode. Utility Model Content
[0003] Therefore, it is necessary to provide an exhaust pipe and cooking device to address the above problems.
[0004] To address the above problems, this application provides the following technical solution:
[0005] An exhaust pipe comprising an upper pipe section, an upper connector, a lower connector, and a lower pipe section connected in sequence;
[0006] The lower connector includes a base, an inner ring, and an outer ring. The inner ring protrudes at least partially from the side of the base near the upper connector and is connected to the lower pipe section. The outer ring protrudes from the side of the base near the upper connector and is spaced around the inner ring. The base, the inner ring, and the outer ring together form a water collection trough, and the bottom wall of the water collection trough is provided with a drain hole.
[0007] The upper connector includes a small-diameter pipe section, a transition pipe section, and a large-diameter pipe section. The small-diameter pipe section is connected to the upper pipe section, and the large-diameter pipe section is connected to the outer ring. The transition pipe section extends from the end of the small-diameter pipe section near the large-diameter pipe section to the end of the large-diameter pipe section near the small-diameter pipe section. From the small-diameter pipe section to the large-diameter pipe section, the diameter of the transition pipe section gradually increases.
[0008] This exhaust pipe has at least the following beneficial effects:
[0009] When a cooking appliance using this exhaust pipe performs its steaming function, water vapor inside the inner pot is expelled to the outside through the exhaust pipe. Some of this water vapor condenses on the inner walls of the upper pipe section and the upper connector. This condensate flows into the water collection tank under gravity and is eventually drained to the outside through the drain hole. This reduces the amount of condensate flowing back into the inner pot through the exhaust pipe, minimizing its impact on the temperature and humidity inside the pot. This allows for more precise control of the temperature and humidity within the pot, ultimately improving the cooking performance of the appliance in steam mode.
[0010] In one embodiment, the transition section is frustum-shaped, and the taper of the transition section is less than or equal to 2.
[0011] This design helps prevent condensate from dripping prematurely into the inner ring and eventually flowing back into the inner liner during its passage through the transition pipe. It also helps reduce the amount of condensate flowing back into the inner liner through the exhaust pipe, thus reducing the impact of condensate on the temperature and humidity inside the inner liner. This allows for more precise control of the temperature and humidity inside the inner liner and improves the cooking performance of the equipment in steam mode.
[0012] In one embodiment, the upper pipe section is interference-fitted onto the lower diameter pipe section.
[0013] This design facilitates the assembly and disassembly of the upper pipe section and the upper connector.
[0014] In one embodiment, the lower pipe section is interference-fitted to the inner ring.
[0015] This design facilitates the assembly and disassembly of the lower pipe section and the lower connector.
[0016] In one embodiment, the inner ring portion protrudes from the side of the seat away from the upper connector, and the lower pipe section is interference-fitted onto the portion of the inner ring protruding from the side of the seat away from the upper connector.
[0017] This design facilitates the assembly and disassembly of the lower pipe section and the lower connector.
[0018] In one embodiment, the exhaust pipe further includes a raised seat and a cover plate, the raised seat being fixed to the bottom wall of the water collection tank, and the cover plate being rotatably connected to the raised seat; the cover plate is restricted to rotating between the inner ring and the transition pipe section and the rotation range of the cover plate is less than 90°, and the cover plate blocks the inner ring when rotated to the inner ring; the cover plate is configured to be blown up by the gas discharged from the exhaust pipe during the exhaust process.
[0019] With this design, during the steaming function of the cooking equipment, the exhaust pipe releases gas, causing the cover to be blown away from the inner ring by the exhaust gas. This opens the inner ring, allowing water vapor in the inner pot to be smoothly discharged to the outside through the exhaust pipe. Moreover, the cover rotates at most to the position where it is abutted by the transition pipe section, and the angle of rotation is less than 90°. After the cooking equipment finishes working, the airflow in the exhaust pipe gradually weakens, and eventually, the cover rotates downwards under the influence of gravity to seal the inner ring. On the one hand, this prevents flying insects from entering the inner pot through the exhaust pipe; on the other hand, it facilitates rapid heating of the cooking equipment during the next steaming function.
[0020] This application also provides a cooking device, which includes:
[0021] Box;
[0022] An inner liner is provided in the box body, and the inner wall of the inner liner encloses the cooking cavity;
[0023] A steam generator is connected to the cooking cavity;
[0024] The aforementioned exhaust pipe, wherein the lower pipe section is connected to the inner liner and communicates with the cooking cavity, and the upper pipe section, the upper connector, the lower connector, and the lower pipe section are distributed sequentially from top to bottom; and
[0025] A condensate box, detachably connected to the housing, is used to collect condensate discharged from the drain hole.
[0026] This cooking equipment has at least the following beneficial effects:
[0027] During the steaming function of the cooking appliance, water vapor inside the inner pot is exhausted to the outside through the vent pipe. Some of this water vapor condenses on the inner walls of the upper pipe section and the upper connector, and this condensate flows into the water collection tank under gravity, eventually draining into the condensate box through the drain hole. This reduces the amount of condensate flowing back into the inner pot through the vent pipe, which helps to minimize the impact of condensate on the temperature and humidity inside the inner pot, allowing for more precise control of these parameters and improving the cooking performance in steam mode. Furthermore, users can easily remove the condensate box from the appliance for convenient emptying and cleaning.
[0028] In one embodiment, the axial uniform plumb direction of the upper connector and the lower connector is consistent.
[0029] This design allows condensate formed on the inner walls of the upper pipe section and the upper connector to enter the water collection tank under gravity, which helps reduce the amount of condensate flowing back into the inner liner through the exhaust pipe, reduces the impact of condensate on the temperature and humidity inside the inner liner, facilitates precise control of the temperature and humidity inside the inner liner, and improves the cooking effect of the cooking equipment in steam mode.
[0030] In one embodiment, the condensate box is located directly below the drain hole.
[0031] This design allows the condensate box to collect the condensate drained from the drain hole.
[0032] In one embodiment, the cooking device further includes a water pump having an inlet and an outlet, the inlet being connected to the drain hole and the outlet being located inside the condensate box.
[0033] With this setup, the water pump can draw the condensate from the collection tank into the condensate box, which can be placed anywhere. Attached Figure Description
[0034] Figure 1 This is a perspective view of a cooking apparatus according to an embodiment of this application;
[0035] Figure 2 for Figure 1 A three-dimensional schematic diagram of the structure shown from another perspective;
[0036] Figure 3 for Figure 2 A three-dimensional schematic diagram of the middle section structure;
[0037] Figure 4 for Figure 3 Schematic diagram of the exhaust pipe structure;
[0038] Figure 5 for Figure 4 The structure shown is a cross-sectional view at section AA.
[0039] Figure 6 for Figure 5 Enlarged view of point B in the middle;
[0040] Figure 7 for Figure 4 An exploded view of the exhaust pipe shown.
[0041] Figure 8 for Figure 7 A three-dimensional schematic diagram of the central structure, in which the cover plate is blown up;
[0042] Figure 9 for Figure 8 The diagram shows a three-dimensional representation of the structure in another state, where the cover plate seals the inner ring.
[0043] Figure label:
[0044] 1. Cabinet; 2. Inner liner; 21. Cooking cavity; 3. Steam generator; 4. Exhaust pipe; 41. Upper pipe section; 42. Upper connector; 421. Small diameter pipe section; 422. Transition pipe section; 423. Large diameter pipe section; 43. Lower connector; 431. Seat; 432. Inner ring; 433. Outer ring; 434. Water collection trough; 435. Drain hole; 44. Lower pipe section; 45. Elevating seat; 46. Cover plate. Detailed Implementation
[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0049] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0050] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0051] See Figures 1 to 7 This application first provides an exhaust pipe 4, which includes an upper pipe section 41, an upper connector 42, a lower connector 43 and a lower pipe section 44 connected in sequence.
[0052] See Figures 6 to 9 The lower connector 43 includes a base 431, an inner ring 432 and an outer ring 433. The inner ring 432 protrudes at least partially from the side of the base 431 near the upper connector 42 and is connected to the lower pipe section 44. The outer ring 433 protrudes from the side of the base 431 near the upper connector 42 and is spaced around the inner ring 432. The base 431, the inner ring 432 and the outer ring 433 together form a water collection trough 434. A drain hole 435 is provided on the bottom wall of the water collection trough 434.
[0053] See Figure 6 and Figure 7 The upper connector 42 includes a small-diameter pipe section 421, a transition pipe section 422, and a large-diameter pipe section 423. The small-diameter pipe section 421 is connected to the upper pipe section 41, and the large-diameter pipe section 423 is connected to the outer ring 433. The transition pipe section 422 extends from the end of the small-diameter pipe section 421 near the large-diameter pipe section 423 to the end of the large-diameter pipe section 423 near the small-diameter pipe section 421. From the small-diameter pipe section 421 to the large-diameter pipe section 423, the diameter of the transition pipe section 422 gradually increases.
[0054] During the steaming function of the cooking equipment using the exhaust pipe 4, water vapor inside the inner pot 2 is discharged to the outside through the exhaust pipe 4. Some of this water vapor condenses on the inner walls of the upper pipe section 41 and the upper connector 42. This condensate enters the water collection tank 434 under gravity and is eventually discharged to the outside through the drain hole 435. This reduces the amount of condensate flowing back into the inner pot 2 through the exhaust pipe 4, which helps to reduce the impact of condensate on the temperature and humidity inside the inner pot 2, allowing for more precise control of the temperature and humidity inside the inner pot 2, and ultimately improving the cooking effect of the cooking equipment in steam mode.
[0055] See Figure 6 and Figure 7The transition pipe section 422 is frustum-shaped, and its taper is less than or equal to 2. This helps prevent condensate from dripping prematurely into the inner ring 432 and eventually flowing back into the inner liner 2 as it passes through the transition pipe section 422. It also helps reduce the amount of condensate flowing back into the inner liner 2 through the exhaust pipe 4, thus reducing the impact of condensate on the temperature and humidity inside the inner liner 2. This allows for precise control of the temperature and humidity inside the inner liner 2 and improves the cooking effect of the cooking equipment in steam mode.
[0056] See Figures 5 to 6 The upper pipe section 41 is interference-fitted onto the smaller diameter pipe section 421. This facilitates the assembly and disassembly of the upper pipe section 41 and the upper connector 42.
[0057] See Figures 5 to 6 The lower pipe section 44 is interference-fitted to the inner ring 432. This facilitates the assembly and disassembly of the lower pipe section 44 and the lower connector 43.
[0058] See Figure 6 The inner ring 432 protrudes from the side of the seat 431 away from the upper connector 42, and the lower pipe section 44 is interference-fitted onto the portion of the inner ring 432 that protrudes from the seat 431 away from the upper connector 42. This facilitates the assembly and disassembly of the lower pipe section 44 and the lower connector 43.
[0059] In other embodiments, the upper pipe section 41 may also be interference-fitted through the small-diameter pipe section 421, and the lower pipe section 44 may also be interference-fitted through the inner ring 432.
[0060] For example, the upper connector 42 and the lower connector 43 are either snap-fit or threaded together.
[0061] See Figures 6 to 9 The exhaust pipe 4 also includes a raised seat 45 and a cover plate 46. The raised seat 45 is fixed to the bottom wall of the water collection tank 434, and the cover plate 46 is rotatably connected to the raised seat 45. The cover plate 46 is restricted to rotating between the inner ring 432 and the transition pipe section 422, and the rotation range of the cover plate 46 is less than 90°. When rotated to the inner ring 432, the cover plate 46 blocks the inner ring 432 (e.g., ...). Figure 9(As shown). The cover 46 is configured to be blown up by the gas discharged from the exhaust pipe 4 during the exhaust process. Thus, during the steaming function of the cooking equipment, the exhaust pipe 4 discharges gas, and the cover 46 is blown up by the gas and moves away from the inner ring 432, opening the inner ring 432. This allows water vapor in the inner pot 2 to be smoothly discharged to the outside through the exhaust pipe 4. Furthermore, the cover 46 rotates at most to the position where it is abutted by the transition pipe section 422, and the angle of rotation is less than 90°. After the cooking equipment finishes operating, the airflow in the exhaust pipe 4 gradually weakens, and eventually, the cover 46 rotates downwards under gravity to seal the inner ring 432. This prevents external flying insects from entering the inner pot 2 through the exhaust pipe 4; it also facilitates rapid heating of the cooking equipment during the next steaming function.
[0062] For example, in order to ensure that the cover plate 46 can be blown up by the gas discharged from the exhaust pipe 4, the cover plate 46 is a thin stainless steel sheet or a thin plastic sheet resistant to high temperature.
[0063] See Figures 1 to 3 This application further provides a cooking device, which includes a housing 1, an inner liner 2, a steam generator 3, a condensate box, and the aforementioned exhaust pipe 4. The inner liner 2 is located within the housing 1, and its inner wall encloses a cooking cavity 21 in which food is placed for cooking. The steam generator 3 communicates with the cooking cavity 21 and supplies high-temperature steam to it. A lower pipe section 44 is connected to the inner liner 2 and communicates with the cooking cavity 21. An upper pipe section 41, an upper connector 42, a lower connector 43, and the lower pipe section 44 are distributed sequentially from top to bottom. The condensate box is detachably connected to the housing 1 and is used to collect condensate discharged from the drain hole 435.
[0064] During the steaming function of the cooking equipment, water vapor inside the inner pot 2 is discharged to the outside through the exhaust pipe 4. Some of this water vapor condenses on the inner walls of the upper pipe section 41 and the upper connector 42. This condensate flows into the water collection tank 434 under gravity and is eventually discharged into the condensate box through the drain hole 435. This reduces the amount of condensate flowing back into the inner pot 2 through the exhaust pipe 4, which helps to reduce the impact of condensate on the temperature and humidity inside the inner pot 2, allowing for more precise control of the temperature and humidity, and improving the cooking effect of the equipment in steam mode. Furthermore, the user can remove the condensate box from the body 1 for easy emptying and cleaning of the condensate box.
[0065] For example, the cooking equipment is a steam oven, a steam oven, or a combination steam oven and grill.
[0066] See Figure 3The axial direction of the upper connector 42 and the lower connector 43 is uniformly aligned with the vertical direction. This facilitates the condensate formed on the inner wall of the upper pipe section 41 and the inner wall of the upper connector 42 to enter the water collection tank 434 under the action of gravity, which helps to reduce the amount of condensate flowing back into the inner liner 2 through the exhaust pipe 4, which helps to reduce the impact of condensate on the temperature and humidity inside the inner liner 2, which helps to accurately control the temperature and humidity inside the inner liner 2, and which helps to improve the cooking effect of the cooking equipment in steam mode.
[0067] In some embodiments, the condensate tray is located directly below the drain hole 435. This allows the condensate tray to collect the condensate drained from the drain hole 435.
[0068] In other embodiments, the cooking apparatus also includes a water pump having an inlet and an outlet. The inlet is connected to a drain hole 435, and the outlet is located inside a condensate collection box. Thus, the water pump can pump condensate from the collection tank 434 into the condensate collection box, which can be placed anywhere.
[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.
Claims
1. An exhaust pipe characterized by, It includes an upper pipe section, an upper connector, a lower connector, and a lower pipe section that are connected in sequence; The lower connector includes a base, an inner ring, and an outer ring. The inner ring protrudes at least partially from the side of the base near the upper connector and is connected to the lower pipe section. The outer ring protrudes from the side of the base near the upper connector and is spaced around the inner ring. The base, the inner ring, and the outer ring together form a water collection trough, and the bottom wall of the water collection trough is provided with a drain hole. The upper connector includes a small-diameter pipe section, a transition pipe section, and a large-diameter pipe section. The small-diameter pipe section is connected to the upper pipe section, and the large-diameter pipe section is connected to the outer ring. The transition pipe section extends from the end of the small-diameter pipe section near the large-diameter pipe section to the end of the large-diameter pipe section near the small-diameter pipe section. From the small-diameter pipe section to the large-diameter pipe section, the diameter of the transition pipe section gradually increases.
2. The exhaust pipe according to claim 1, characterized by The transition pipe section is frustum-shaped, and the taper of the transition pipe section is less than or equal to 2.
3. The exhaust pipe according to claim 1, characterized by The upper pipe section is interference-fitted onto the lower diameter pipe section.
4. The exhaust pipe according to claim 1, characterized by The lower pipe section is interference-fitted to the inner ring.
5. The exhaust pipe according to claim 4, characterized by The inner ring portion protrudes from the side of the seat body away from the upper connector, and the lower pipe section is interference-fitted onto the portion of the inner ring protruding from the side of the seat body away from the upper connector.
6. The exhaust pipe according to claim 1, characterized by The exhaust pipe also includes a raised seat and a cover plate. The raised seat is fixed to the bottom wall of the water collection tank, and the cover plate is rotatably connected to the raised seat. The cover plate is restricted to rotating between the inner ring and the transition pipe section, and the rotation range of the cover plate is less than 90°. When the cover plate is rotated to the inner ring, it blocks the inner ring. The cover plate is configured to be blown up by the gas discharged from the exhaust pipe during the exhaust process.
7. A cooking apparatus, characterized by, include: Box; An inner liner is provided in the box body, and the inner wall of the inner liner encloses the cooking cavity; A steam generator is connected to the cooking cavity; The exhaust pipe according to any one of claims 1 to 6, wherein the lower pipe section is connected to the inner liner and communicates with the cooking cavity, and the upper pipe section, the upper connector, the lower connector and the lower pipe section are distributed in order from top to bottom; and A condensate box, detachably connected to the housing, is used to collect condensate discharged from the drain hole.
8. The cooking apparatus according to claim 7, characterized in that, The axial direction of the upper connector and the lower connector is consistent with that of the plumb bob.
9. The cooking apparatus according to claim 7, wherein The condensate box is located directly below the drain hole.
10. The cooking apparatus according to claim 7, wherein The cooking device also includes a water pump, which has an inlet and an outlet. The inlet is connected to the drain hole, and the outlet is located inside the condensate box.