Novel iron pan with pressure and braising and steaming functions
Through the precise matching of the cast iron lid and the pot body and the exhaust port design, the problem of insufficient sealing of the pot is solved, the pressure steaming function and safety are improved, the air pressure balance in the pot is ensured, and the risk of lateral diffusion of hot air is reduced.
Patent Information
- Application Number
- CN202510917760.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2025-10-10
AI Technical Summary
During use, existing kitchen cookware lacks an effective seal between the lid and the pot body, causing heat to diffuse, posing a safety hazard and failing to maintain the heat pressure inside the pot. Traditional exhaust valves are prone to clogging.
The pot lid and pot body are made of cast iron, with finely machined sealing surfaces and exhaust port designs. The lid and pot body are sealed and pressure relieved under changing air pressure. The weight of the lid and the exhaust port structure ensure the air pressure balance inside the pot. Combined with the guiding vertical surface, an exhaust channel is formed to reduce the lateral diffusion of hot air.
The pressure-steaming function of the cooker is realized, which improves the safety and sealing effect, reduces the risk of lateral diffusion of hot air, and ensures safe kitchen operation.
Smart Images
Figure CN120753508A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of kitchenware, and in particular relates to a novel pressure and steaming iron pot. Background Art
[0002] Kitchen pots and pans are mainly composed of two parts: a pot body and a lid. Most of them use a thin stainless steel lid that is placed directly on the pot body. The lid mainly serves to cover the food in the pot. By covering the pot with the lid, the cooking time can be reduced and the food can be cooked faster than if the pot body is directly left open. During the continuous heating and cooking process, hot air is generated with a higher temperature. The principle of rising hot air causes the hot air to push the lid upward to form an upward thrust. Since the pot lid is thin and easy to be pushed open, the hot air will diffuse outward to the periphery of the lid and the pot body. There is no sealing between the lid and the pot body, and a certain hot air pressure cannot be maintained in the pot. Some pots are equipped with rubber sealing rings for sealing, but the sealing rings are prone to aging and deformation, affecting the sealing effect. There are also exhaust valves on the top of some pot lids. The exhaust valves are used to discharge steam, but the hot air drives some food debris directly upward through the exhaust valve during the cooking process, which can easily cause blockage and failure, posing a safety hazard. Summary of the Invention
[0003] The purpose of the present invention is to provide a new type of pressure and steaming iron pot in view of the defects of the prior art.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a new type of pressure and steaming iron pot, comprising a pot cover and a pot body, the pot cover and pot body being made of cast iron; the pot cover comprising: a body and an annular flange extending downwardly from the lower surface of the body, the flange being provided with an exhaust port;
[0005] When the pot cover and the pot body are matched, the contact surface between the two is a precision-machined sealing surface, including a first state and a second state.
[0006] In the first state, the lid is tightly fitted to the pot body under the action of its own gravity, forming a sealed space between the lid and the pot body;
[0007] In the second state, when the air pressure inside the pot is greater than the weight of the pot lid, the gas pushes the pot lid upward within the effective range of up and down movement, the contact surface between the two shifts to release the space seal, and the gas inside the pot is exhausted to the outside through the exhaust port.
[0008] Furthermore, the exhaust port is connected to the inner side surface and the outer side surface of the flange, and extends upward from the lower surface of the flange.
[0009] Furthermore, the exhaust port has a structure that is wider at the bottom and narrower at the top, so that the amount of exhaust gas discharged through the exhaust port during the effective upward stroke of the pot cover in the second state changes from small to large.
[0010] Furthermore, the contact surface between the pot cover and the pot body includes two vertical surfaces or inclined surfaces that adapt to each other.
[0011] Furthermore, a guiding vertical surface is provided on the pot body. When the pot body is matched with the pot cover, a gap is provided between the outer side surface of the pot cover and the guiding vertical surface as an exhaust channel, so that the gas in the second state goes up along the exhaust channel when discharged outward through the exhaust port.
[0012] Furthermore, the outer side surface of the pot cover is a vertical surface, including: the outer side surface of the body, or the outer side surface of the body and the outer side surface of the flange.
[0013] Furthermore, the pot body also includes a first step and a second step arranged on the inner wall of the pot body and connected from top to bottom, a guiding vertical surface is provided on the first step, and at least one contact surface is provided on the first step and the second step.
[0014] Furthermore, the bottom surface of the first step is an inclined surface, and the inner side of the inclined surface facing the center of the pot body is lower than the outer side away from the center of the pot body.
[0015] Furthermore, the pot body also includes a lower groove formed along the upper surface and opening downward, the inner side wall of the lower groove cooperates with the pot cover to form a contact surface, and a gap is set between the outer side wall of the lower groove serving as a guiding vertical surface and the outer side surface of the body.
[0016] Furthermore, a water return hole is provided in the lower groove, connecting the inner wall of the lower groove and the inner wall of the pot body.
[0017] Furthermore, the outer side wall of the lower groove is higher than the inner side wall of the lower groove.
[0018] Furthermore, the pot body is provided with an exhaust hole in the area of the effective stroke of the pot cover moving up and down.
[0019] Furthermore, the opening of the pot body adopts a widened structure compared to other parts of the pot body.
[0020] By adopting the technical solution of the present invention, the beneficial effects of the present invention are:
[0021] 1. The cast iron lid and pot body are matched together, and the entire iron pot has uniform thermal conductivity. The weight of the cast iron lid creates a certain pressure on the pot body. The contact surface between the lid and the pot body is a precision-machined sealing surface, which is tightly matched to form a space seal between the lid and the pot body. At this time, the pot body is in a relatively sealed state, which can maintain a certain amount of heat and is convenient for stewing food.
[0022] When the pressure inside the pot is lowered and the pressure drops below the weight of the lid, the lid moves down and closes under its own gravity until the pressure between the lid and the hot gas in the pot returns to equilibrium. This ensures that the pot always maintains a certain pressure, and the iron pot has the functions of a pressure cooker and stewing.
[0023] 3. When the lid and the pot body are matched, a gap is provided as an exhaust channel. The exhaust channel guides the hot air discharged from the edge of the lid through the setting of the guiding vertical surface on the pot body, guiding the hot air coming out of the exhaust port to rise and drift in the vertical direction, reducing the lateral diffusion of the hot air, and effectively reducing the safety hazard of high-temperature burns caused by the hot air that may be sprayed laterally when the kitchen operator approaches the pot. Compared with traditional pots, the safety of kitchen utensils is further improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 1 is a schematic diagram of the lower surface of the pot cover of Example 1;
[0025] Figure 2 is a cross-sectional view of the pot cover and pot body of the first embodiment in a disassembled state;
[0026] Figure 3 is a cross-sectional view of the pot lid and pot body of the first embodiment in a closed state;
[0027] Figure 4 is a cross-sectional view of the pot cover and pot body of the second embodiment in a disassembled state;
[0028] Figure 5 is a cross-sectional view of the pot lid and pot body of the second embodiment in a closed state;
[0029] Figure 6 is a cross-sectional view of the pot cover and pot body of the third embodiment in a disassembled state;
[0030] Figure 7 is a cross-sectional view of the pot lid and pot body of the third embodiment in a closed state;
[0031] Figure 8 It is a cross-sectional view of the pot lid and pot body of the fourth embodiment in the closed state.
[0032] In the figure: 10 pot lid, 1 body, 11 outer side surface of the body, 12 lower surface of the body located outside the flange, 2 flange, 21 inner side surface, 22 outer side surface, 23 lower surface, 3 exhaust port, 4 opening, 41 first bottom surface, 42 second bottom surface, 43 guide vertical surface, 44 side 1, 45 third step, 46 fourth step, 5 gap, C hot air, 6 pot body, 61 lower groove, 62 outer side wall, 63 air vent, 7 return water hole, 8 lifting ear. DETAILED DESCRIPTION
[0033] The specific embodiments of the present invention are further described in conjunction with the accompanying drawings to make the technical solution clearer and more understandable.
[0034] Example 1
[0035] like Figure 1-3 As shown, the new pressure and steaming iron pot includes a lid 10 and a pot body 6 adapted for the lid. Both the lid 10 and the pot body 6 are made of cast iron. The lid 10 comprises a body 1 for covering the opening of the pot body 6; a flange 2 extending downwardly from the lower surface of the body 1 in an annular configuration, and a vent 3 provided on the flange 2. The vents 3 are arranged uniformly along the circumference of the flange. When the lid 10 and the pot body 6 are mated, the contact surface between them forms a precisely machined sealing surface, which can be in a first state and a second state.
[0036] In the first state, the lid 10, under its own weight, forms a tight fit at the contact surface between the lid 10 and the pot body 6, creating a sealed space between the lid 10 and the pot body 6. In the second state, when the pressure inside the pot body 6 exceeds the weight of the lid 10, the gas pushes the lid 10 upward within its effective range, displacing the contact surface between the two and releasing the seal. Gas C within the pot body is exhausted outward through the exhaust port. The effective range is the maximum distance the lid can move upward when the thrust generated by the hot gas exceeds the weight of the lid.
[0037] In this embodiment, a second step is provided on the inner wall of the pot body 1 at the opening 4 , and the second step includes a side surface 44 and a second bottom surface 42 .
[0038] The first set of contact surfaces includes the outer side surface 22 of the flange 2 in the pot cover 10 and the side surface 44 inside the pot body 6. When the pot cover 10 and the pot body 6 are matched, the two contact to form a seal. The outer side surface 22 and the side surface 44 are both vertical surfaces.
[0039] The second set of contact surfaces includes the lower surface 23 on the flange 2 in the pot cover 10 and the second bottom surface 42 in the pot body 6. When the pot cover 10 and the pot body 6 are matched, the two contact to form a seal.
[0040] A first step is provided on the inner wall of the pot body 1 near the opening. A second step is located below the first step and connects to the first step 41. The first step includes a vertical guide surface 43 and a first bottom surface 41. There is a certain distance between the flange 2 and the outer edge of the body 1. The lower surface 12 of the body outside the flange is inclined, and the corresponding first bottom surface 41 is also inclined. The slope is designed so that the inner side toward the center of the pot is lower than the outer side away from the center of the pot.
[0041] The third set of contact surfaces includes the first bottom surface 41 on the pot body 1 and the lower surface 12 of the body located outside the flange. When the pot cover 10 and the pot body 6 are matched, the two are in contact to form a seal.
[0042] A sealing effect is achieved by cooperating with one or more contact surfaces between the lid and the pot body. Combined with the exhaust port 3, the air inside the pot body is released from the sealed state and discharged to the outside, thereby reducing pressure and relieving pressure. At the same time, due to the weight of the lid, a certain pressure is maintained between the lid and the pot body, which allows the pot body to maintain a high temperature. This high temperature allows for stewing and improves the taste of food. A support pad can also be placed inside the pot body, and food can be placed on the support pad instead of directly on the bottom of the pot body to achieve stewing and steaming of food.
[0043] The exhaust port 3 communicates with the inner side surface 21 and the outer side surface 22 of the flange, and can be in various shapes, such as a circle. In this embodiment, the exhaust port 3 extends upward from the lower surface of the flange 2, and has a structure that is wider at the bottom and narrower at the top, such as a triangle or an isosceles trapezoid. When the pot lid 10 is used in conjunction with the pot body 6, the lower end of the exhaust port is larger. When the pot lid 10 is lifted upward after the seal is released, the exhaust volume changes gradually from small to large. The higher the pot lid is within its effective travel, the greater the exhaust volume is, and the heat in the pot body is then released through the exhaust channel.
[0044] The guiding vertical surface 43 on the inner wall of the pot body 6 is provided with a gap 5 between the guiding vertical surface 43 and the outer side surface 11 of the main body 1 as an exhaust channel when the pot cover 10 is matched with the pot body 1, so that the gas in the second state goes up along the exhaust channel when it is discharged outward through the exhaust port 3.
[0045] A handle 8 is provided at the center of the upper surface of the pot cover 10 to facilitate the user to hold the pot cover.
[0046] Example 2
[0047] like Figure 4-5As shown, unlike Example 1, the new pressure and steaming iron pot of this embodiment has a lower groove 61 provided on the pot body 1 near the opening 4, which is cut downward along the upper surface of the pot body 6. The inner sidewall of the lower groove 61, serving as the side surface 44, is a precision-machined sealing surface, and the inner side surface 21 of the flange is also a precision-machined sealing surface. When the pot lid 10 is mated with the pot body 6, the side surface 44 and the inner side surface 21 are in contact and tightly fit together to achieve a seal. A gap 5 is provided between the outer side surface 11 of the pot body 1 and the outer sidewall 52 of the lower groove, which serves as a vertical guide surface. The outer side surface 11 of the pot body 1 is preferably a vertical surface.
[0048] In the pot cover 10 of this embodiment, the flange 2 is extended downward along the outer side surface of the body 1, so that the outer side surface 11 of the body and the outer side surface of the flange are located on the same plane.
[0049] The lower groove 61 is provided with a return water hole 7 which is connected to the inner side wall 63 of the lower groove and the inner wall of the pot body. The return water hole 7 can be provided with one or several evenly distributed ones.
[0050] The outer side wall 62 of the lower groove 62 is higher than the inner side wall 63 of the lower groove. The opening of the pot body of this embodiment adopts a thickened structure to facilitate the arrangement of the lower groove and improve the firmness of this part.
[0051] By providing a lower groove 61 in the pot body 6 for receiving the flange 2 of the pot lid, rising hot air enters the lower groove 61 through the exhaust port 3. The liquefied water portion of the hot air is stored in the lower groove 61, which also provides a certain sealing effect. Water above the return hole 7 flows back into the pot body 6 through the return hole 7.
[0052] Example 3
[0053] like Figure 6-7 As shown, unlike Example 1, in the novel pressure and steaming iron pot of this embodiment, the outer side surface 22 and lower surface 23 of the flange 2 of the pot lid 10 serve as contact surfaces, while the side surface 144 and the second bottom surface 46 of the second step provided in the pot body serve as contact surfaces. When the pot lid 10 is mated with the pot body 6, the outer side surface 22 and the side surface 144 contact as a first set of contact surfaces, tightly fitting and achieving a seal, while the lower surface 23 and the second bottom surface 46 contact as a second set of contact surfaces, tightly fitting and achieving a seal.
[0054] The outer side surface 22 and the side surface 44 are both inclined surfaces, wherein the inner side of the inclined surface facing the center of the pot body is lower than the outer side away from the center of the pot body. The inclination angle α of the inclined surface on the flange is less than or equal to 45 degrees.
[0055] The inner wall of the pot body 6 includes a first step and a second step connected from top to bottom. The first step includes a guide vertical surface 43 and a first bottom surface 45. The outer side surface 11 of the main body is preferably a vertical surface. When the pot cover is matched with the pot body, the gap 5 is provided between the outer side surface 11 of the main body and the guide vertical surface 43.
[0056] The contact surface between the pot cover and the pot body is fitted together, thereby improving the sealing performance of the pot cover in the closed state, so that when the pot cover 10 and the pot body 6 are closed, the contact position at the lower part is more tightly fitted under the action of the pot cover 10's own gravity.
[0057] Example 4
[0058] like Figure 8 As shown, unlike the previous embodiment, in the new pressure and steaming iron pot of this embodiment, the pot body 6 is provided with vent holes 63 within the effective upward travel area of the pot lid 10 under the action of hot gas. During the travel of the hot gas resisting the weight of the pot lid and pushing the pot lid upward, the hot gas reaching the gap 5 can be discharged through the vent holes 63 in the pot body after rising.
[0059] The pot cover 1 in this embodiment can be provided with an exhaust port or without an exhaust port.
[0060] In a specific structure, the pot cover 1 has no exhaust port, so that when the pressure generated by the hot gas is greater than the gravity of the pot cover and the pot cover moves up within the effective stroke, the hot gas directly goes out from the exhaust hole 63 on the pot body.
[0061] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A new type of pressure and steaming iron pot, including a pot cover and a pot body, characterized in that: The pot cover and pot body are made of cast iron; the pot cover includes: a body and a ring-shaped flange extending downward along the lower surface of the body, and the flange is provided with an exhaust port; When the pot cover and the pot body are matched, the contact surface between the two is a precision-machined sealing surface, including a first state and a second state. In the first state, the lid is tightly fitted to the pot body under the action of its own gravity, forming a sealed space between the lid and the pot body; In the second state, when the air pressure inside the pot is greater than the weight of the pot lid, the gas pushes the pot lid up and down within the effective range of movement, the contact surface between the two shifts to release the space seal, and the gas inside the pot is exhausted to the outside through the exhaust port.
2. The new pressure and steaming iron pot according to claim 1 is characterized in that: The exhaust port is connected to the inner side and outer side of the flange, and extends upward from the lower surface of the flange; or, the exhaust port has a structure that is wide at the bottom and narrow at the top, so that the amount of exhaust gas discharged through the exhaust port during the effective stroke of the pot cover in the second state changes from small to large.
3. The new pressure and steaming iron pot according to claim 1 is characterized in that: The contact surface between the pot cover and the pot body includes two vertical surfaces or inclined surfaces that adapt to each other.
4. The novel pressure and steaming iron pot according to any one of claims 1 to 3, characterized in that: The pot body is provided with a guiding vertical surface. When the pot body is matched with the pot cover, a gap is provided between the outer side surface of the pot cover and the guiding vertical surface as an exhaust channel, so that the gas in the second state goes up along the exhaust channel when discharged outward through the exhaust port.
5. The new pressure and steaming iron pot according to claim 4 is characterized in that: The outer side surface of the pot cover is a vertical surface, including: the outer side surface of the body, or the outer side surface of the body and the outer side surface of the flange.
6. The novel pressure and steaming iron pot according to claim 4 is characterized in that: The pot body further comprises a first step and a second step which are arranged on the inner wall of the pot body and connected from top to bottom. A guiding vertical surface is arranged on the first step, and at least one contact surface is arranged on the first step and the second step.
7. The novel pressure and steaming iron pot according to claim 6, characterized in that: The bottom surface of the first step is an inclined surface, and the inner side of the inclined surface facing the center of the pot body is lower than the outer side away from the center of the pot body.
8. The novel pressure and steaming iron pot according to claim 4 is characterized in that: The pot body also includes a lower groove formed along the upper surface and opening downward. The inner side wall of the lower groove cooperates with the pot cover to form a contact surface. A gap is set between the outer side wall of the lower groove serving as a guide vertical surface and the outer side surface of the body.
9. The novel pressure and steaming iron pot according to claim 8, characterized in that: The lower groove is provided with a water return hole communicating with the inner side wall of the lower groove and the inner wall of the pot body, or the outer side wall of the lower groove is higher than the inner side wall of the lower groove.
10. The novel pressure and steaming iron pot according to claim 9, characterized in that: The pot body is provided with an exhaust hole in the area of the effective stroke of the pot cover when it moves up and down.