Novel pressure and braising iron

Abstract

A novel pressure cooker and steaming iron pot includes a lid and a pot body made of cast iron. The lid includes a body and a ring-shaped flange extending downwards along the lower surface of the body, with a vent on the flange. When the lid and pot body are fitted together, the contact surface between them is a precision-machined sealing surface, including a first state and a second state. In the first state, the lid, under its own weight, ensures a tight fit between the contact surfaces, forming a spatial seal between the lid and the pot body. In the second state, when the gas pressure inside the pot exceeds the weight of the lid, the gas pushes the lid within its effective vertical movement stroke, causing the contact surface between the two to shift and releasing the spatial seal. The gas inside the pot is then released through the vent. Cast iron has uniform thermal conductivity, and the weight of the cast iron lid creates a certain pressure inside the pot. The tight fit between the lid and the pot body forms a spatial seal, and the vent, after releasing the seal, is used for venting and stabilizing the gas pressure, giving the iron pot the effects of a pressure cooker and a steaming pot.

Description

Technical Field

[0001] This utility model belongs to the technical field of kitchenware, specifically relating to a novel pressure and steaming iron pot. Background Technology

[0002] Kitchen cookware mainly consists of two parts: the pot body and the lid. Most lids are made of thin stainless steel and are placed directly on the pot body. The lid primarily serves to cover the food inside the pot. Using a lid reduces cooking time and allows food to cook faster compared to leaving the pot open. During the continuous heating and cooking process, the generated steam is at a high temperature. The principle of rising steam causes the steam to push upwards, creating an upward thrust. Because the lid is thin, it is easily pushed open, and the steam diffuses outwards to the outer edge of both the lid and the pot body. There is no airtight seal between the lid and the pot body, and the steam pressure inside the pot cannot be maintained. Some pots have rubber sealing rings to achieve a seal, but these rings are prone to aging and deformation, affecting the sealing effect. Some lids also have vent valves on top to release steam, but the hot steam can carry food scraps and debris upwards through the vent valve, causing blockages and malfunctions, posing a safety hazard. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a new type of pressure- and steaming iron pot.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a novel pressure and steaming iron pot, comprising a lid and a pot body, wherein the lid and the pot body are made of cast iron; the lid comprises: a body and a flange extending downward along the lower surface of the body in an annular shape, wherein the flange is provided with an exhaust port;

[0005] When the lid and the pot body are fitted together, the contact surface between them is a precision-machined sealing surface, including a first state and a second state.

[0006] In the first state, the lid, under its own weight, causes the contact surfaces of the two to fit tightly together, forming a space seal between the lid and the pot body.

[0007] In the second state, when the gas pressure inside the pot is greater than the weight of the lid, the gas pushes the lid upward within the effective stroke of the up-and-down movement. The contact surface between the two shifts, releasing the spatial seal, and the gas inside the pot is exhausted out through the exhaust port.

[0008] Furthermore, the exhaust port connects the inner and outer sides 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 discharged through the exhaust port during the effective stroke of the pot lid in the second state changes from small to large.

[0010] Furthermore, the contact surface between the lid and the pot body includes two mutually compatible vertical or inclined surfaces.

[0011] Furthermore, the pot body is provided with a guide vertical surface. When it is fitted with the pot lid, a gap is provided between the outer side of the pot lid and the guide vertical surface as an exhaust channel, so that when the gas in the second state is discharged outward through the exhaust port, it rises along the exhaust channel.

[0012] Furthermore, the outer surface of the lid is a vertical surface, comprising: the outer surface of the body, or the outer surface of the body and the outer surface of the flange.

[0013] Furthermore, the pot body also includes a first step and a second step connected from top to bottom on the inner wall of the pot body. The first step is provided with a guide vertical surface, and the first step and the second step are provided with at least one contact surface.

[0014] Furthermore, the bottom surface of the first step is a slope, and the inner side of the slope facing the center of the pot is lower than the outer side away from the center of the pot.

[0015] Furthermore, the pot body also includes a lower groove formed by opening downward along the upper surface. The inner wall of the lower groove cooperates with the pot lid to form a contact surface, and a gap is provided between the outer wall of the lower groove, which serves as a guide vertical surface, and the outer side surface of the main body.

[0016] Furthermore, the lower groove is provided with a water return hole that connects the inner wall of the lower groove with the inner wall of the pot.

[0017] Furthermore, the outer wall of the lower groove is higher than the inner wall of the lower groove.

[0018] Furthermore, the pot body is provided with vents within the effective travel range of the pot lid's vertical movement.

[0019] Furthermore, the opening of the pot body is wider than other parts of the pot body.

[0020] The beneficial effects of adopting the technical solution of this utility model are as follows:

[0021] 1. The pot lid is made of cast iron and the pot body are made of cast iron. The heat conduction of the whole pot is uniform. The weight of the cast iron pot lid itself creates a certain pressure on the inside of the pot. The contact surface between the pot lid and the pot body is a precision-machined sealing surface. The tight fit forms a space seal between the pot lid and the pot body. At this time, the inside of the pot is in a relatively sealed state, which can retain a certain amount of heat and facilitate the braising of food.

[0022] 2. By providing an outlet for the rising hot air inside the pot through the vent located below the lid, the probability of blockage caused by the upward rush of hot air during use of traditional vent valves is effectively reduced. The vent helps to balance the gas pressure between the lid and the pot. Due to changes in the gas pressure inside the pot, the lid moves up and down within an effective stroke. When the pressure of the hot air inside the pot exceeds the weight of the lid, the hot air pushes the lid up within the effective stroke, causing the contact surface between the two to shift and releasing the spatial seal. The hot air is then discharged to the outside of the pot through the vent. Because the vent is wider at the bottom and narrower at the top, the venting channel, which allows for greater exhaust volume as the lid rises, releases the pressure of the hot air inside the pot. When the temperature of the hot air inside the pot decreases and the pressure drops to less than the weight of the lid, the lid moves down and closes under its own weight until the pressure of the hot air inside the pot returns to equilibrium. This ensures that a certain pressure is always maintained inside the pot, giving the iron pot the functions of a pressure cooker and a braising pot.

[0023] 3. When the lid and the pot body are fitted together, a gap is provided as an exhaust channel. This exhaust channel, through the vertical guide surface on the pot body, guides the hot air escaping from the edge of the lid. The hot air coming out of the exhaust port is guided to rise and disperse at a vertical angle, reducing the lateral diffusion of hot air. This effectively reduces the safety hazard of kitchen staff being burned by the laterally diffused hot air when they approach the pot. Compared with traditional pots, this further improves the safety of kitchen utensils. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the lower surface of the pot lid in Embodiment 1;

[0025] Figure 2 This is a cross-sectional view of the pot lid and pot body in the separated state according to Embodiment 1;

[0026] Figure 3 This is a cross-sectional view of the pot lid and pot body in the closed state according to Embodiment 1;

[0027] Figure 4 This is a cross-sectional view of the pot lid and pot body in the separated state according to Embodiment 2;

[0028] Figure 5 This is a cross-sectional view of the pot lid and pot body in the closed state according to Embodiment 2;

[0029] Figure 6 This is a cross-sectional view of the pot lid and pot body in the separated state in Embodiment 3;

[0030] Figure 7 This is a cross-sectional view of the pot lid and pot body in the closed state according to Embodiment 3;

[0031] Figure 8 This is a cross-sectional view of the pot lid and pot body in the closed state in Embodiment 4.

[0032] In the diagram: 10. Lid, 1. Body, 11. Outer side of the body, 12. Lower surface of the body located outside the flange, 2. Flange, 21. Inner side, 22. Outer side, 23. Lower surface, 3. Vent, 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 wall, 63. Vent hole, 7. Water return hole, 8. Lifting lug. Detailed Implementation

[0033] The specific solutions and embodiments of this utility model will be further described in conjunction with the accompanying drawings, making the technical solution clearer and more understandable.

[0034] Example 1

[0035] like Figure 1-3 As shown, a novel pressure and steaming iron pot includes a lid 10 and a pot body 6 adapted to the lid. Both the lid 10 and the pot body 6 are made of cast iron. The lid 10 includes: a body 1 for covering the opening of the pot body 6; and a flange 2 extending downward along the lower surface of the body 1 in a ring shape. The flange 2 is provided with exhaust ports 3, which are one or more evenly distributed along the circumference of the flange. When the lid 10 and the pot body 6 are fitted together, the contact surface between them is a precision-machined sealing surface, including a first state and a second state.

[0036] In the first state, the lid 10, under its own weight, ensures a tight fit between the lid and the pot body 6, forming a spatial seal. In the second state, when the gas pressure inside the pot body 6 exceeds the weight of the lid 10, the gas pushes the lid 10 within its effective vertical movement stroke, causing the contact surface between them to shift and releasing the spatial seal. The gas C inside the pot is then exhausted through the exhaust port. The effective stroke refers to the maximum distance the lid can be moved upwards when the thrust generated by the hot gas exceeds its weight.

[0037] In this embodiment, a second step is provided on the inner wall of the pot body 1 at the opening 4. The second step includes a side surface 44 and a bottom surface 42.

[0038] The first set of contact surfaces includes the outer side 22 of the flange 2 in the lid 10 and the inner side 44 of the pot body 6. When the lid 10 and the pot body 6 are fitted together, they come into contact to form a seal. Both the outer side 22 and the inner side 44 are vertical surfaces.

[0039] The second set of contact surfaces includes the lower surface 23 on the flange 2 of the lid 10 and the second bottom surface 42 inside the pot body 6. When the lid 10 and the pot body 6 are fitted together, they come into contact to form a seal.

[0040] A first step is provided on the inner wall of the pot body 1 near the opening, and a second step is located below the first step and connected to the first step 41. The first step includes a guide vertical 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 located outside the flange is inclined, and the corresponding first bottom surface 41 is also inclined. The inclined surface is designed such that the inner side facing the center of the pot body is lower than the outer side away from the center of the pot body.

[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 lid 10 and the pot body 6 are fitted together, the two contact each other to form a seal.

[0042] A sealing effect is achieved through the cooperation of one or more contact surfaces between the lid and the pot body. Combined with the vent 3, the gas inside the pot is released from the seal, thus reducing and releasing pressure. At the same time, because the lid has a certain weight, a certain pressure is maintained between the lid and the inside of the pot body, allowing the inside of the pot to maintain a high temperature. This high temperature enables simmering and improves the taste of the food. A tray can also be placed inside the pot, so that the food is placed on the tray instead of directly on the bottom of the pot body, for steaming purposes.

[0043] The exhaust port 3 connects the inner side 21 and the outer side 22 of the flange and can be in various shapes such as circular. 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. It can be in the shape of a triangle or an isosceles trapezoid. When the lid 10 is closed with the pot body 6, the lower opening of the exhaust port is larger. When the lid 10 is lifted after the seal is broken, the exhaust volume changes gradually from small to large. The exhaust volume increases as the lid goes higher within the effective stroke, and then the hot air inside the pot is released through the exhaust channel.

[0044] The guide vertical surface 43 on the inner wall of the pot body 6, when the pot lid 10 is fitted with the pot body 1, provides a gap 5 between the guide vertical surface 43 and the outer side surface 11 of the main body 1 as an exhaust channel, so that when the gas in the second state is discharged outward through the exhaust port 3, it rises along the exhaust channel.

[0045] A handle 8 is provided at the center of the upper surface of the lid 10, making it convenient for users to hold and pick up the lid.

[0046] Example 2

[0047] like Figure 4-5As shown, unlike Embodiment 1, the novel pressure and steaming iron pot of this embodiment has a lower groove 61 near the opening 4 of the pot body 1, formed by a downward groove along the upper surface of the pot body 6. The inner side wall of the lower groove 61, serving as 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 fitted with the pot body 6, side surface 44 and inner side surface 21 come into tight contact to achieve a seal. A gap 5 is provided between the outer side surface 11 of the body 1 and the outer side wall 52 of the lower groove, which serves as a guide vertical surface. The outer side surface 11 of the body 1 is preferably a vertical surface.

[0048] In the pot lid 10 of this embodiment, the flange 2 extends downward along the outer side of the body 1, so that the outer side 11 of the body and the outer side of the flange are on the same surface.

[0049] The lower groove 61 is provided with a water return hole 7 that connects the inner sidewall 63 of the lower groove with the inner wall of the pot. There can be one water return hole 7 or several evenly distributed ones.

[0050] The outer wall 62 of the lower groove 62 is higher than the inner wall 63 of the lower groove. In this embodiment, the opening of the pot body adopts a thickened structure, which facilitates the setting of the lower groove and improves the firmness of this part.

[0051] By creating a lower groove 61 on the pot body 6 to accommodate 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 also stored in the lower groove 61, which also provides a certain sealing effect. Meanwhile, water above the position of the return water hole 7 flows back into the pot body 6 through the return water hole 7.

[0052] Example 3

[0053] like Figure 6-7 As shown, unlike Embodiment 1, in this embodiment of the novel pressure and steaming iron pot, the outer side 22 and lower surface 23 of the flange 2 in the pot lid 10 are contact surfaces, and the side 44 and the second bottom surface 46 of the second step provided in the pot body are also contact surfaces. When the pot lid 10 is fitted with the pot body 6, the outer side 22 and the side 44 contact each other as the first set of contact surfaces to achieve a tight fit and seal, and the lower surface 23 and the second bottom surface 46 contact each other as the second set of contact surfaces to achieve a tight fit and seal.

[0054] Both outer surface 22 and side surface 44 are beveled, with the inner side of the bevel facing the center of the pot body lower than the outer side away from the center of the pot body. The inclination angle α of the bevel 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 lid is fitted 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] By ensuring the contact surfaces of the lid and the pot body fit together, the sealing performance of the lid is improved when it is closed. This results in a tighter fit at the lower contact points of the lid 10 under its own weight when the lid 10 is closed to the pot body 6.

[0057] Example 4

[0058] like Figure 8 As shown, unlike the previous embodiments, in this embodiment of the novel pressure and steaming iron pot, the pot body 6 is provided with a vent 63 in the area of ​​the effective upward stroke of the lid 10 under the action of hot air. During the stroke in which the hot air pushes the lid upward against the weight of the lid, the hot air that reaches the gap 5 can also escape from the vent 63 on the pot body after rising.

[0059] In this embodiment, the lid 1 can be configured to have a vent or not.

[0060] In one specific structure, the lid 1 has no vent, so that when the pressure generated by the hot air is greater than the weight of the lid and the lid moves upward within the effective stroke, the hot air is directly released from the vent 63 on the pot body.

[0061] Note that the above description is merely a preferred embodiment 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 various obvious changes, readjustments, and substitutions can be made 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 novel pressure and steaming iron pot, comprising a lid and a body, characterized in that, The lid and the pot body are made of cast iron; the lid includes: a body and a flange extending downward along the lower surface of the body in an annular shape, the flange being provided with an exhaust port; When the lid and the pot body are fitted together, the contact surface between them is a precision-machined sealing surface, including a first state and a second state. In the first state, the lid, under its own weight, causes the contact surfaces of the two to fit tightly together, forming a space seal between the lid and the pot body. In the second state, when the gas pressure inside the pot is greater than the weight of the lid, the gas pushes the lid within the effective stroke of its up-and-down movement, and the contact surface between the two shifts, releasing the spatial seal. The gas inside the pot is then exhausted outward through the exhaust port.

2. The novel pressure-and-steaming iron pot according to claim 1, characterized in that, The vent connects the inner and outer sides of the flange and extends upward from the lower surface of the flange; or, the vent has a structure that is wider at the bottom and narrower at the top, so that the amount of exhaust gas discharged through the vent during the effective stroke of the lid in the second state changes from small to large.

3. The novel pressure-and-steaming iron pot according to claim 1, characterized in that, The contact surfaces between the lid and the pot body include two mutually compatible vertical or inclined surfaces.

4. The novel pressure-and-steaming iron pot according to any one of claims 1-3, characterized in that, The pot body is provided with a guide vertical surface. When it is fitted with the pot lid, a gap is provided between the outer side of the pot lid and the guide vertical surface as an exhaust channel, so that the gas in the second state is discharged outward through the exhaust port and rises along the exhaust channel.

5. The novel pressure and steaming iron pot according to claim 4, characterized in that, The outer surface of the pot lid is a vertical surface, comprising: the outer surface of the body, or the outer surface of the body and the outer surface of the flange.

6. The novel pressure and steaming iron pot according to claim 4, characterized in that, The pot body also includes a first step and a second step connected from top to bottom on the inner wall of the pot body. The first step is provided with a guide vertical surface, and the first step and the second step are provided with at least one contact surface.

7. The novel pressure and steaming iron pot according to claim 6, characterized in that, The bottom surface of the first step is a slope, and the inner side of the slope facing the center of the pot is lower than the outer side away from the center of the pot.

8. The novel pressure and steaming iron pot according to claim 4, characterized in that, The pot body also includes a lower groove formed by opening downward along the upper surface. The inner sidewall of the lower groove cooperates with the pot lid to form a contact surface. A gap is provided between the outer sidewall of the lower groove, which serves as a guide vertical surface, and the outer side of the main 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 that connects the inner wall of the lower groove with the inner wall of the pot, or the outer wall of the lower groove is higher than the inner 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 vents within the effective travel range of the pot lid's vertical movement.

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