Steam pressure cooker with locking structure

Abstract

The steam pressure cooker with the locking structure comprises a cooker body, a cooker cover, a steam inlet valve and a steam release valve, the cooker body comprises an outer container and an inner container, the inner container is arranged in the outer container, an annular outer protruding edge is arranged on the outer side of a container opening of the inner container, outer bosses are arranged below the annular outer protruding edge at intervals, and the outer bosses are arranged in the outer container. L-shaped inner convex edges capable of clamping the outer bosses therein are arranged on the inner side of the lower end of the pot cover locking ring at intervals corresponding to the outer bosses, a pot cover sealing ring is arranged between the pot cover and the inner container, an L-shaped step is arranged between the annular outer convex edge and the inner groove of the inner container, the pot cover sealing ring is arranged on the L-shaped step, and a cooking frame is further arranged in the inner container. The steam box has the advantages that the safety is high, the steam box cannot shake, and no noise is generated in the cooking process.

Description

Technical Field

[0001] This invention relates to the field of heat preservation and heating devices, and more particularly to a steam pressure cooker with a locking structure. Background Technology

[0002] Existing pressure cookers typically have a separate lid and body. In cases of excessive pressure and a malfunctioning safety valve, the lid can easily detach and pop off, posing a safety hazard. While the lid and body are sealed with a sealing ring, the sealing surfaces are flat, resulting in a poor seal.

[0003] Existing heat preservation and heating devices such as pressure cookers, steamers, or thermos flasks with steam inlet and outlet valves use a method of suspending the steaming box inside the pot and circulating steam through the gap between the outer wall of the steaming box and the inner wall of the pot, as well as the space left at the bottom of the steaming box and the bottom of the pot. In this method of directly suspending the steaming box inside the pot, the steaming box is prone to shaking when the steam pressure inside the pot is high. If the food in the steaming box is soup or boiled food, it is easy to overflow. In addition, the shaking of the steaming box during the steaming process produces a lot of noise.

[0004] Existing insulated containers, such as thermos cups or insulated lunch boxes, are generally made of ceramic or stainless steel with a vacuum layer to hold water or food. They have a lid that seals tightly, and the vacuum insulation layer slows down heat loss from the water or food inside, thus achieving the purpose of heat preservation. However, existing insulated containers generally do not have a self-heating function; they can only keep things warm and cannot directly heat or cook the food inside. This makes them very inconvenient to use and fails to meet the growing social demand. Summary of the Invention

[0005] To address the aforementioned technical problems in the background art, this invention provides a steam pressure cooker with a locking structure, which has the advantages of high safety, no shaking of the steaming box, and no noise during the steaming process.

[0006] The technical solution of this invention is as follows: This invention is a steam pressure cooker with a locking structure, comprising a pot body and a lid, the lid being positioned above the pot body. The steam pressure cooker with the locking structure further includes a steam inlet valve, a steam outlet valve, a combination valve, and a check valve. The steam inlet valve and the steam outlet valve are both located on the wall of the pot body and communicate with the inside of the pot body. A steam box is suspended inside the pot body. A lid locking ring is provided on the outer side of the lid to lock the lid and the pot body. The pot body includes an outer liner and an inner liner, the inner liner being positioned inside the outer liner. An annular outer protrusion is provided on the outer side of the opening of the inner liner, and outer protrusions are spaced apart below the annular outer protrusion. The inner side of the lower end of the lid locking ring corresponds to... The outer protrusion is spaced apart by L-shaped inner protrusions that can hold the outer protrusions in place. A lid sealing ring is provided between the lid and the inner liner. An L-shaped step is provided between the annular outer protrusion and the inner groove of the inner liner. The lid sealing ring is set on the L-shaped step. A steaming rack is also provided inside the inner liner. The steaming rack includes a steaming mesh, which is cylindrical. The steaming mesh is provided with steaming holes. The lower part of the steaming mesh is provided with an inwardly pressed inner groove. There are multiple steaming holes, which are evenly distributed on the side walls and bottom of the steaming mesh. The inner groove is arranged around the inside of the steaming mesh. There are multiple supports at the bottom of the steaming mesh, which are evenly distributed at the bottom of the steaming mesh. The supports are cylinders, hemispheres, or cones.

[0007] Furthermore, both the steam inlet valve and the steam outlet valve are two-way steam valves. The two-way steam valve includes a second valve body, a fourth through hole at the center of the second valve body, a second valve core inside the fourth through hole, a fifth through hole at the center of the second valve core, a rubber ball inside the fifth through hole, a first retaining ring at the front end of the fifth through hole, a fourth spring between the first retaining ring and the rubber ball, an annular inner convex edge corresponding to the shape of the rubber ball on the inner wall of the rear end of the fifth through hole, a second retaining ring at the bottom of the second valve body, a third spring between the second valve core and the second retaining ring, a first air guide tube behind the second retaining ring, a third outer convex edge on the outer side of the front end of the second valve core, the second retaining ring located inside the fourth through hole, a fourth outer convex edge on the outer side of the second retaining ring, the third spring positioned between the third and fourth outer convex edges, a second annular boss on the inner side of the front end of the fourth through hole, the first retaining ring embedded in the front end of the second valve body, and a sixth sealing ring between the second annular boss and the first retaining ring.

[0008] Furthermore, a hollow fixing cap is provided at the bottom of the second valve body, a second retaining ring is provided on the fixing cap, a fourth sealing ring is provided between the second retaining ring and the fixing cap, a pot body connecting sleeve is provided on the outside of the second valve body, a fixing locking cap is provided on the lower outer side of the pot body connecting sleeve, a first air guide pipe passes through the fixing locking cap and communicates with the fixing cap, an annular clamping plate is provided on the outer side of the front end of the first air guide pipe, the annular clamping plate is located between the fixing locking cap and the fixing cap, a second air guide pipe is provided at the front end of the second valve body and communicates with the fourth through hole, a third sealing ring is provided between the second valve body and the pot body connecting sleeve, a fifth sealing ring is provided between the pot body connecting sleeve and the pot body, and a seventh sealing ring is provided between the annular clamping plate and the fixing cap.

[0009] Furthermore, the steam pressure cooker with locking structure also includes a combination valve and a floating stop valve. The lid is provided with a first through hole and a sixth through hole respectively. The combination valve is located in the first through hole, with the top and bottom of the combination valve extending outside the first through hole. The floating stop valve is located in the sixth through hole. An inwardly pressed groove is provided below the opening of the inner pot.

[0010] Furthermore, the combination valve includes a first valve body, a valve shell, a first valve core, an inner spring, and an outer spring. The valve shell is disposed on the first valve body. A second through hole is provided at the center of the first valve body. The first valve core is disposed within the second through hole. The top of the first valve core extends into the valve shell. A first outer boss is provided on the lower outer side of the first valve core. A first inner boss is provided at the lower part of the second through hole of the first valve body. The first outer boss overlaps with the first inner boss. A first hole communicating with the second through hole is provided on the first valve body above the first inner boss. A spring is provided around the outer side of the first valve core. An inner spring is provided, located between the first outer protrusion and the valve body. A first outer flange is provided on the outer top of the valve body, and a second outer flange is provided on the outer bottom of the first valve body, located on the outer side of the bottom of the first through hole. An outer spring is arranged around the outer side of the first valve body, located within the first through hole, between the first outer flange and the bottom of the lid. A second hole is provided on the first outer flange. A handle is provided above the lid locking ring, the handle being a hollow structure with one open end, containing a drawer. A corresponding combination valve is located on the lid locking ring. A combination valve pressing ball is located at the top, and a first spring is arranged around the outside of the combination valve pressing ball. A third hole is provided at the bottom of the handle corresponding to the position of the combination valve pressing ball, and the combination valve pressing ball can extend into the third hole. The float stop valve includes a valve shell, a third valve core, a U-shaped rubber ring, and a through-hole bolt. A third through hole is provided inside the valve shell, and the third valve core is located in the third through hole of the valve shell, with the top of the third valve core extending outside the valve shell. The U-shaped rubber ring is located in the third through hole and below the third valve core. The bottom of the third valve core... The valve core extends into the U-shaped rubber ring. A through-hole bolt is provided at the third through hole at the bottom of the valve housing. A second outer boss is provided on the lower outer side of the third valve core. A second inner boss is provided in the middle of the third through hole of the valve housing. The third valve core overlaps with the top two sides of the U-shaped rubber ring through the second outer boss. The through-hole bolt and the third through hole are connected by threads. The top of the third valve core extends out of the sixth through hole. The bottom of the through-hole bolt extends out of the sixth through hole. A fourth hole is provided at the bottom of the handle corresponding to the position of the third valve core. The third valve core can extend into the fourth hole.

[0011] Furthermore, the pot lid includes an upper cover, insulating foam, a bottom plate, and a pressing cap. The insulating foam is disposed between the upper cover and the bottom plate. A pressing cap is disposed above the upper cover to press the upper cover firmly onto the insulating foam. A first through hole is disposed on the insulating foam. The upper cover has a first upper hole above the first through hole of the insulating foam. The bottom plate has a first lower hole below the first through hole of the insulating foam. A combination valve is disposed in the first through hole. The top of the combination valve extends out of the first upper hole, and the bottom extends out of the first lower hole. An outer spring is disposed between the first outer protrusion and the bottom plate. A sixth through hole is disposed on the insulating foam. The upper cover has a second upper hole above the sixth through hole of the insulating foam. The bottom plate has a second lower hole below the sixth through hole of the insulating foam. The top of the third valve core extends out of the second upper hole, and the bottom of the through-hole bolt extends out of the second lower hole. A first sealing ring is disposed between the bottom of the valve housing and the bottom plate. The bottom plate has an arc-shaped concave shape at the position corresponding to the sealing ring of the pot lid. The sealing ring of the pot lid is disposed between the L-shaped step and the arc-shaped concave shape.

[0012] Furthermore, the outer wall of the valve housing is connected to the inner wall of the second through hole by a thread. An outer sealing ring is arranged around the outer side of the first valve body above the second outer protrusion. The outer sealing ring is located between the bottom plate and the second outer protrusion. An inner sealing ring is arranged between the first outer boss and the first inner boss. The valve housing includes a first valve housing and a second valve housing. The second valve housing is located below the first valve housing. The second valve housing and the first valve housing are movably connected by a thread. An outer edge is arranged around the top outer side of the U-shaped rubber ring. The outer edge is engaged between the second valve housing and the first valve housing. A through-hole bolt is arranged at the bottom of the second valve housing. A first sealing ring is arranged between the bottom of the second valve housing and the bottom plate.

[0013] Furthermore, the steam inlet valve and the steam outlet valve are respectively located on the same side of the pot body. The steam pressure cooker also includes a handle, which is located on both sides of the pot body. The center of the lid locking ring and the center of the pressure cover are movably connected by a top bolt. The lid locking ring can rotate relative to the pressure cover through the top bolt. The bottom of the drawer is in an inner arc shape corresponding to the position of the combination valve pressing ball.

[0014] Furthermore, the pressure cap is connected to the pot body via a hinge frame and a hinge. The hinge frame is U-shaped, and the pot lid locking ring is located inside the U-shaped hinge frame. A protrusion is provided at the end where the hinge connects to the hinge frame, and hinge shafts are provided on both sides of the protrusion. A groove is provided at the end where the hinge frame connects to the hinge, and the protrusion is engaged in the groove. Waist-shaped holes are provided on both sides of the groove corresponding to the positions of the hinge shafts. The outer ends of the hinge shafts are inserted into the waist-shaped holes. The contact surfaces at the bottom of the groove and the bottom of the protrusion are arc surfaces that are lower in the front and higher in the back.

[0015] Furthermore, the bottom of the pot body is provided with a bottom shell, inside which are a lower bottom plate and an upper bottom plate, forming a cavity between the lower bottom plate and the upper bottom plate. A cylindrical shaft is horizontally provided on the outer side of the drawer facing inward. The inner side of the handle and the inner side of the hinge frame are provided with cylindrical shaft holes that can be inserted into the cylindrical shaft.

[0016] This invention provides a steam pressure cooker with a locking structure. The inner pot has an annular outer protrusion at the opening, and outer protrusions spaced apart below this annular outer protrusion. The inner side of the lower end of the lid locking ring has an L-shaped inner protrusion corresponding to the outer protrusions, which can hold the outer protrusions in place. Even in the event of excessive pressure inside the pot and a failure of the safety valve, the L-shaped inner protrusion of the lid locking ring cannot disengage from the outer protrusions on the inner pot, preventing the lid and pot body from separating, thus ensuring good safety. Below the opening of the inner pot, there is an inwardly pressed inner groove. The steaming box, through its top outer protrusion, is secured to the inner groove, allowing it to be conveniently suspended within the inner pot for heating. A sealing ring is provided between the lid and the inner pot. An L-shaped step is provided between the annular outer protrusion and the inner groove, and an arc-shaped concave shape is provided on the bottom plate corresponding to the sealing ring. The sealing ring is positioned between the L-shaped step and the arc-shaped concave shape. This sealing structure provides excellent sealing performance and effectively prevents steam leakage between the lid and the inner pot.

[0017] In the steaming rack of this invention, during the steaming process, the steaming box is placed inside the steaming net above the inner groove. The steaming net below the inner groove serves as a suspension support for the steaming box, preventing it from shaking. Other steaming boxes or heating packs can also be placed inside the steaming net below the inner groove. The steaming rack of this invention can also be used independently in the field. By placing a heating source inside the steaming net below the inner groove, the container placed inside the steaming net above the inner groove can be heated. It is especially suitable for the food heating and steaming requirements of self-driving and long-distance freight drivers.

[0018] The steam inlet valve and steam outlet valve of the present invention are bidirectional steam valves. A second through hole is provided in the middle of the second valve core, and a rubber ball is provided in the second through hole. By the sealing and opening of the rubber ball, the automatic switching between steam inlet and steam outlet is realized, so that the functions of the steam inlet valve and the steam outlet valve can be realized by a single bidirectional steam valve.

[0019] This invention provides a steam pressure cooker with a locking structure. The lid is equipped with a combination valve and a check valve. The combination valve is a combined safety valve, which simultaneously functions as a pressure relief valve and a safety valve. The check valve operates by releasing gas through a through-hole bolt when there is sufficient pressure inside the cooker. This gas pushes up a U-shaped rubber ring, simultaneously lifting a third valve core in the center. The third valve core then engages with a corresponding fourth hole at the bottom of the handle, locking the pressure. When the pressure is depleted, the valve automatically drops, allowing the lid to rotate and unlock. Therefore, this invention offers advantages such as high safety and a self-locking function.

[0020] The pot lid of this invention includes an upper lid, insulating foam, a bottom plate, and a compression lid. A bottom shell is provided at the bottom of the pot body, and a lower bottom plate and an upper bottom plate are disposed within the bottom shell, forming a sealed cavity between the lower and upper bottom plates. The pot body includes an outer liner and an inner liner, with the inner liner disposed inside the outer liner, forming a sealed cavity between the inner and outer liner. A vacuum is drawn within the sealed cavity; this closed structure provides better heat preservation. Furthermore, the steam inlet valve and steam outlet valve of this invention are respectively located on the same side of the pot body wall, facilitating easy operation by the driver from the driver's seat by connecting the steam inlet valve and steam outlet valve to the steam generating device on the same side.

[0021] This invention can also utilize the Chinese patent applied for by the applicant: publication number CN207229214U, entitled "A Waste Heat Extraction Device for Internal Combustion Engine Exhaust Gas", which uses the heat of recovered automobile exhaust gas to heat it through the steam inlet valve. It has the advantages of being environmentally friendly and recycling resources, and is especially suitable for the food heating and cooking requirements of self-driving and long-distance freight drivers. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the exploded structure of the present invention;

[0023] Figure 2 Internal cross-section of the present invention Figure 1 ;

[0024] Figure 3 Internal cross-section of the present invention Figure 2 ;

[0025] Figure 4 for Figure 3 Enlarged schematic diagram of part A;

[0026] Figure 5 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 6 for Figure 5 Enlarged schematic diagram of part B;

[0028] Figure 7 This is a schematic diagram of the combined valve of the present invention;

[0029] Figure 8 for Figure 7 CC section view.

[0030] Figure 9 This is a schematic diagram of the structure of the float stop valve of the present invention;

[0031] Figure 10 for Figure 9 DD sectional view.

[0032] Figure 11 This is a schematic diagram of the structure of the bidirectional steam valve of the present invention;

[0033] Figure 12 This is a cross-sectional schematic diagram of the bidirectional steam valve of the present invention;

[0034] Figure 13 This is a schematic diagram of the one-way steam valve of the present invention;

[0035] Figure 14 This is a cross-sectional schematic diagram of the one-way steam valve of the present invention as a steam inlet valve;

[0036] Figure 15 This is a cross-sectional schematic diagram of the one-way steam valve of the present invention as a steam outlet valve;

[0037] Figure 16 This is a schematic diagram of the steaming box of the present invention;

[0038] Figure 17 This is a schematic diagram of the steaming rack of the present invention;

[0039] Figure 18 This is a front view of the steaming rack of the present invention.

[0040] The annotations in the attached figures are explained as follows:

[0041] 1. Bottom plate; 2. Handle; 3. Drawer; 4. Hinge; 5. Top plate; 6. Outer liner; 7. Surface silicone sleeve; 8. Inner liner; 9. Lid locking ring; 10. Handle; 11. Steam vent valve; 12. Steam inlet valve; 13. Steaming tray; 14. Second steam pipe; 15. Steaming tray lid; 16. Steam valve manual lever; 17. Bottom shell; 18. Combination valve; 19. Combination valve pressing bead; 20. Top bolt; 21. Bolt washer; 22. Floating stop valve; 23. Insulation foam; 24. Pressing cover; 25. Top cover; 26. Sixth through hole; 27. Hinge bracket; 28. Lid sealing ring; 29. ​​Bottom plate; 30. First spring; 31. First through hole; 32. First steaming tray; 33. Second steaming tray; 34. Cylindrical shaft; 5. Groove; 36. Hinge shaft; 37. Waist-shaped hole; 38. Inner groove; 39. Lunch box handle; 40. Protrusion; 41. First air guide pipe; 42. Second valve body; 43. First retaining ring; 44. Second valve core; 45. Rubber ball; 46. Second retaining ring; 47. Third spring; 48. Fourth spring; 49. Third sealing ring; 50. Fourth sealing ring; 51. Pot body connecting sleeve; 52. Fixing cap; 54. Fifth sealing ring; 55. Sixth sealing ring; 56. Fourth through hole; 57. Fourth outer protrusion; 58. Second annular boss; 59. Third outer protrusion; 60. Fifth through hole; 61. Annular inner protrusion; 62. Fixing locking cap; 63. Annular clamping plate; 64. Seventh sealing ring; 65. Steaming rack;

[0042] 801. L-shaped step; 802. Annular outer protrusion; 803. Outer boss; 804. Inner groove of the inner liner.

[0043] 901, L-shaped inner convex edge;

[0044] 1201, Third valve body; 1202, Eighth sealing ring; 1203, Second spring; 1204, Ninth sealing ring; 1205, Reversing valve body; 1206, Tenth sealing ring; 1207, Reversing valve core; 1208, Metal rod; 1209, Fourth air guide tube; 1210, Rubber pad; 1211, Fourth valve core; 1212, Plug; 1213, Valve sleeve; 1214, Third air guide tube; 1215, Locking cap.

[0045] 1801, First valve body; 1802, Valve shell; 1803, First valve core; 1804, Inner sealing ring; 1805, Outer sealing ring; 1806, Inner spring; 1807, Outer spring; 1808, First outer flange; 1809, First outer boss; 1810, First inner boss; 1811, Second hole; 1812, First hole; 1813, Second outer flange; 1814, Second through hole.

[0046] 2201, First valve housing; 2202, Third valve core; 2203, Second valve housing; 2204, U-shaped rubber ring; 2205, First sealing ring; 2206, Through-hole bolt; 2207, Second outer boss; 2208, Second inner boss; 2209, Third through hole; 2210, Outer edge.

[0047] 6601, cooking hole; 6602, inner groove of cooking rack; 6603, support body. Detailed Implementation

[0048] The overall solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0049] See Figure 1 , 23, 4, 5. The specific embodiment of the present invention includes a pot body, a pot lid, a steam inlet valve 12, a steam vent valve 11, and a combination valve 18. The pot lid is located above the pot body. The steam inlet valve 12 and the steam vent valve 11 are both located on the barrel wall of the pot body and communicate with the inside of the pot body. In a preferred embodiment of the present invention, the steam inlet valve 12 and the steam vent valve 11 are respectively located on the barrel wall on the same side of the pot body. A pot lid locking ring 9 is provided on the outside of the pot lid to lock the pot lid and the pot body. The pot body includes an outer liner 6 and an inner liner 8. The inner liner 8 is located inside the outer liner 6, and a sealed cavity is formed between the inner liner 8 and the outer liner 6. The sealed cavity is vacuumed, resulting in good heat preservation and insulation effects. A steaming box 13 is suspended inside the inner pot 8, and a steaming box lid 15 is installed on the steaming box 13. The lid includes insulating foam 23, an upper cover 25, and a bottom plate 29. The upper cover 25 is positioned between the insulating foam 23 and the bottom plate 29. A clamping cap 24 is installed above the insulating foam 23 to press the insulating foam 23 firmly onto it. The clamping cap 24 and the upper cover 25 are connected by bolts. The insulating foam 23 is made of plastic, while the clamping cap 24 and the bottom plate 29 are made of stainless steel. This type of lid has good heat preservation performance. Its core advantage is that the locking design of the threaded stainless steel clamping cap 24, when tightened, causes the clamping cap to press firmly against the sealing ring, ensuring the airtightness under high pressure inside the pot and reducing and delaying heat dissipation, thus achieving the function of heat preservation and pressure maintenance. The insulating foam 23 has a first through hole 31. The upper cover 25 has a first upper hole above the first through hole 31. The bottom plate 29 has a first lower hole below the first through hole 31. A combination valve 18 is disposed within the first through hole 31, with its top extending outside the first upper hole and its bottom extending outside the first lower hole. The insulating foam 23 also has a sixth through hole 26. The upper cover 25 has a second upper hole above the sixth through hole 26. The bottom plate 29 has a second lower hole below the sixth through hole 26. A float valve 22 is disposed within the sixth through hole 26. The invention also includes handles 10, which are disposed on both sides of the pot body. One end of the lid is connected to the pot body via a hinge bracket 27 and a hinge 4. A bottom shell 17 is provided at the bottom of the pot body, containing a lower bottom plate 1 and an upper bottom plate 5, forming a cavity between them. A surface silicone sleeve 7 surrounds the upper outer side of the outer pot 6, providing anti-scalding and heat-insulating properties. A handle 2 is located above the lid locking ring 9, containing a hollow structure with one open end and a pull-out drawer 3. A combination valve pressing bead 19 is located on the lid locking ring 9 corresponding to the top of the combination valve 18, surrounded by a first spring 30. A third hole is located at the bottom of the handle 2 corresponding to the position of the combination valve pressing bead 19, allowing the bead 19 to extend into it. The bottom of the drawer 3, corresponding to the position of the combination valve pressing bead 19, is inwardly curved.A cylindrical shaft 34 is horizontally arranged on the outer side of the inward side of drawer 3. Cylindrical shaft holes for inserting the cylindrical shaft 34 are provided on the inner side of handle 2 and the inner side of hinge bracket 27. A lid sealing ring 28 is provided between the lid and the pot body. In this embodiment, the lid sealing ring 28 is located between the bottom plate 29 and the inner pot 8.

[0050] The center of the lid locking ring 9 and the center of the lid clamping cover 24 are movably connected by a top bolt 20, allowing the lid locking ring 9 to rotate relative to the clamping cover 24. A bolt washer 21 is provided between the top bolt 20 and the lid locking ring 9. An annular outer flange 802 is provided on the outer side of the inner pot 8's opening. Below the annular outer flange 802, outer protrusions 803 are spaced apart. On the inner side of the lower end of the lid locking ring 9, corresponding to the outer protrusions 803, an L-shaped inner flange 901 is spaced apart to engage the outer protrusions 803. By rotating the lid locking ring 9, the outer protrusions 803 can be engaged within the L-shaped inner flange 901. Below the opening of the inner pot 8, there is an inwardly pressed inner groove 804. A steaming box 13 is installed inside the inner pot 8. The outer top of the steaming box 13 has an outwardly protruding edge. The steaming box 13 is secured to the inner groove 804 by the outwardly protruding edge and is suspended within the inner pot 8. An L-shaped step 801 is provided between the annular outwardly protruding edge 802 and the inner groove 804. The bottom plate 10 has an arc-shaped concave shape corresponding to the position of the lid sealing ring 28. The lid sealing ring 28 is positioned between the L-shaped step 801 and the arc-shaped concave shape.

[0051] When the lid is closed, first, place the L-shaped inner protrusion 901 at the lower end of the lid locking ring 9 into the gap between the outer protrusions 803. Then, rotate the handle 2 clockwise to rotate the lid locking ring 9. The L-shaped inner protrusion 901 at the lower end of the lid locking ring 9 will then be screwed into the lower part of the outer protrusion 803. The outer protrusion 803 will then be locked inside the L-shaped inner protrusion 901, thus locking the lid. When the lid is opened, rotate the lid locking ring 9 in the opposite direction. The L-shaped inner protrusion 901 will disengage from the outer protrusion 803 and be positioned in the gap between the outer protrusions 803, allowing the lid to be opened.

[0052] See Figure 6In a specific embodiment of the present invention, one side of the pressing cover 24 is connected to the pot body via a hinge frame 27 and a hinge 4. The hinge frame 27 is U-shaped, and one side of the pot cover locking ring 9 is located inside the U-shaped hinge frame 27. A protrusion 40 is provided at the end where the hinge 4 connects to the hinge frame 27. Hinge shafts 36 are respectively provided on both sides of the protrusion 40. A groove 35 is provided at the end where the hinge frame 27 connects to the hinge 4. The protrusion 40 is engaged in the groove 35. Waist-shaped holes 37 are respectively provided on both sides of the groove 35 corresponding to the positions of the hinge shafts 36. The outer ends of each hinge shaft 36 are inserted into the oblong holes 37. The contact surfaces at the bottom of the groove 35 and the bottom sides of the protrusion 40 are arc-shaped surfaces that are lower in the front and higher in the back. The hinge shaft 36 is circumferentially matched with the gap of the oblong holes, and also matches the arc-shaped surfaces of the bottom of the groove 35 and the bottom of the protrusion 40. When the lid is opened, the arc-shaped surfaces interact with each other, and with the upper and lower gaps of the oblong holes 37, the lid can be naturally lifted. When the lid is closed, the arc-shaped surfaces interact with each other, and with the upper and lower gaps of the oblong holes 37, the lid moves down naturally, making opening and closing convenient. The hinge shaft 36 on the hinge 4 is directly machined onto the hinge 4 and is an integral part of the hinge 4.

[0053] See Figure 7 , 8The structure of the combined valve 18 of the present invention includes a first valve body 1801, a valve shell 1802, a first valve core 1804, an inner spring 1806, and an outer spring 1807. The valve shell 1802 is disposed on the first valve body 1801. A second through hole 1814 is provided at the center of the first valve body 1801. The first valve core 1803 is disposed in the second through hole 1814. The top of the first valve core 1803 extends into the valve shell 1802. A first outer boss 1809 is provided on the lower outer side of the first valve core 1804. A first inner boss 1810 is provided at the lower part of the second through hole 1814 of the first valve body 1801. The first outer boss 1809 overlaps the first inner boss 1810. A first hole 1812 communicating with the second through hole 1814 is provided on the first valve body 1801 above the first inner boss 1810. An inner spring 1806 is arranged around the outer side of the first valve core 1804. Located between the first outer protrusion 1809 and the valve housing 1802, the valve housing 1802 has a first outer protrusion 1808 on the top outer side, and the first valve body 1801 has a second outer protrusion 1813 on the bottom outer side. The second outer protrusion 1813 is located on the bottom outer side of the first through hole 31. An outer spring 1807 is arranged around the outside of the first valve body 1801. The outer spring 1807 is located inside the first through hole 31, between the first outer protrusion 1808 and the base plate 29. A second hole 1811 is provided on the first outer protrusion 1808. The outer wall of the valve housing 1802 is connected to the inner wall of the second through hole 1814 by a thread. An outer sealing ring 1805 is arranged around the outside of the first valve body 1801 above the second outer protrusion 1813. The outer sealing ring 1805 is located between the base plate 29 and the second outer protrusion 1813. An inner sealing ring 1804 is provided between the first outer protrusion 1809 and the first inner protrusion 1810.

[0054] The combination valve 18 functions as both a pressure relief valve and a safety valve. When the first valve core 1804 is pushed up by high pressure, gas enters the second through hole 1814 inside the first valve body 1801. The first valve body 1801 has first holes 1812 on both sides that communicate with the second through hole 1814. The gas will walk from the first hole 1812 to the space where the outer spring 1807 is located, and then be discharged from the second hole 1811 on the first outer protrusion 1808 of the valve shell 1802, thus functioning as a combination valve. After the high-pressure gas is discharged, the first valve core 1804 is reset by the elastic force of the inner spring 1806. When the valve housing 1802 and the first valve body 1801 are pressed down together by pressing the combination valve pressing bead 19, the first valve body 1801 will move down slightly below the first lower hole of the base plate 29. At this time, the gas enters from the gap between the outside of the first valve body 1801 and the base plate 29, walks into the space where the outer spring 1807 is located, and then is discharged from the second hole 1811 on the first outer protrusion 1808 of the valve housing 1802. This is the function of manual venting. After the high-pressure gas is discharged, the pressure on the combination valve pressing bead 19 is released, and the combination valve pressing bead 19 is reset by the first spring 30.

[0055] See Figure 9 , 10The structure of the float stop valve 22 of the present invention includes a valve housing, a third valve core 2202, a U-shaped rubber ring 2204, and a through-hole bolt 2206. A third through-hole 2209 is provided inside the valve housing. The third valve core 2202 is disposed within the third through-hole 2209 of the valve housing, and the top of the third valve core 2202 can extend outside the valve housing. The U-shaped rubber ring 2204 is disposed within the third through-hole 2209 and located below the third valve core 2202. The bottom of the valve core 2202 extends into the U-shaped rubber ring 2204. A through-hole bolt 2206 is provided at the third through hole 2209 at the bottom of the valve housing. A second outer boss 2207 is provided on the lower outer side of the third valve core 2202. A second inner boss 2208 is provided in the middle of the third through hole 2209 of the valve housing. The third valve core 2202 overlaps the top two sides of the U-shaped rubber ring 2204 through the second outer boss 2207. A first... The sealing ring 2205, the through-hole bolt 2206, and the third through hole 2209 are connected by threads. The top of the third valve core 2202 extends out of the second upper hole, and the bottom of the through-hole bolt 2206 extends out of the second lower hole. The bottom of the handle 2 is provided with a fourth hole corresponding to the position of the third valve core 2202, and the third valve core 2202 can extend into the fourth hole. The valve housing includes a first valve housing 2201 and a second valve housing 2203. The second valve housing 2203 is located below the first valve housing 2201 and is connected to the first valve housing 2201 by threads. The outer edge 2210 is provided around the top of the U-shaped rubber ring 2204 and is engaged between the second valve housing 2203 and the first valve housing 2201. The through-hole bolt 2206 is located at the bottom of the second valve housing 2203, and a first sealing ring 2205 is provided between the bottom of the second valve housing 2203 and the base plate 29.

[0056] The floating stop valve 22 automatically locks the handle 2 and the pot lid. When there is a certain pressure inside the pot, the gas enters through the through hole of the through bolt 2206 and pushes up the U-shaped rubber ring 2204. At the same time, it pushes up the third valve core 2202 in the middle of the U-shaped rubber ring 2204. The third valve core 2202 goes up and gets into the fourth hole at the bottom of the handle 2. At this time, the pot lid locking ring 9 and the pot lid are locked. When there is no pressure, the third valve core 2202 will fall down automatically, and the pot lid locking ring 9 and the pot lid will be unlocked. Rotating the handle 2 will cause the inner convex edge of the pot lid locking ring 9 to disengage from the outer protrusion of the inner pot, and the pot lid can be opened.

[0057] The combined action of the combination valve 18 and the check valve 22 with the drawer 3 is as follows: when the drawer 3 is pushed in, the third valve core 2202 of the check valve 22 rises due to gas pressure and extends into the fourth hole at the bottom of the handle 2 at the front of the drawer 3. After the third valve core 2202 is in the fourth hole, the handle 2 locks the lid, preventing it from rotating. Then the drawer 3 is pulled out (note that at this time, the third valve core 2202 of the check valve 22 is still in the fourth hole of the drawer 3). The drawer 3 can only be pulled up to the combination valve 18 at the rear. The combination valve press ball 19 is pressed down, and the valve housing 1802 and the first valve body 1801 are pressed down at the same time to start manual venting. When the gas is vented, the third valve core 2202 of the front floating stop valve 22 loses gas pressure, falls down, and disengages from the fourth hole, so the drawer 3 can be pulled out directly (at the same time, the handle 2 is also unlocked). There is a screw on the inner side above the handle 2. The screw is used to block the drawer 3. The drawer 3 cannot be pulled out when it reaches this point. This is to allow the drawer 3 to go deeper inside to ensure the strength when turning the handle 2.

[0058] See Figure 11 , 12In specific embodiments of the present invention, the steam inlet valve 12 and the steam outlet valve 11 can both be bidirectional steam valves. The bidirectional steam valve includes a second valve body 42, a fourth through hole 56 at the center of the second valve body 42, a second valve core 44 inside the fourth through hole 56, a fifth through hole 60 at the center of the second valve core 44, a rubber ball 45 inside the fifth through hole 60, a first retaining ring 43 at the front end of the fifth through hole 60, a fourth spring 48 between the first retaining ring 43 and the rubber ball 45, and an annular inner convex edge 6 corresponding to the shape of the rubber ball 45 on the inner wall of the rear end of the fifth through hole 60. 1. The rubber ball 45 is pressed against the annular inner convex edge 61 by the elastic force of the fourth spring 48. A second retaining ring 46 is provided at the bottom of the second valve body 42. A third spring 47 is provided between the second valve core 44 and the second retaining ring 46. The third spring 47 is installed as follows: a third outer convex edge 59 is provided on the outer side of the front end of the second valve core 44; the second retaining ring 46 is located inside the fourth through hole 56; a second outer convex edge 17 is provided on the outer side of the second retaining ring 46; and the third spring 47 is arranged around the outer side of the second valve core 44 and the second retaining ring 46, located between the third outer convex edge 59 and the fourth outer convex edge 57. A first air guide pipe 41 is provided on the rear side of the second retaining ring 46, and the first air guide pipe 41 communicates with the through hole in the second retaining ring 46. A second annular boss 58 is provided on the inner side of the front end of the fourth through hole 56; the first retaining ring 43 is embedded in the front end of the second valve body 42; and a sixth sealing ring 55 is provided between the second annular boss 58 and the first retaining ring 43. A hollow fixing cap 52 is provided at the bottom of the second valve body 42. A second retaining ring 56 is provided on the fixing cap 52. A fourth sealing ring 50 is provided between the second retaining ring 56 and the fixing cap 52. A pot body connecting sleeve 51 is provided on the outside of the second valve body 42. The second valve body 42 is mounted on the pot body through the pot body connecting sleeve 51. A fifth sealing ring 54 is provided between the pot body connecting sleeve 51 and the pot body. A third sealing ring 49 is provided between the second valve body 42 and the pot body connecting sleeve 51. A fixing locking cap 62 is provided on the lower outer side of the pot body connecting sleeve 51. A first air guide pipe 41 passes through the fixing locking cap 62 and communicates with the through hole in the second retaining ring 46 through the fixing cap 52. An annular retaining plate 63 is provided on the outer side of the front end of the first air guide pipe 41. The annular retaining plate 63 is located between the fixing locking cap 62 and the fixing cap 52. A seventh sealing ring 64 is provided between the annular retaining plate 63 and the fixing cap 52. The front end of the second valve body 42 is provided with a second air guide pipe 15 that communicates with the fourth through hole 56. The second air guide pipe 15 can extend into the bottom of the pot body.

[0059] When the two-way steam valve is used as a steam inlet valve, steam enters from the first steam guide pipe 41, passes through the through hole of the fixing cap 52 and the through hole of the second retaining ring 46 in sequence, and the steam pressure pushes up the rubber ball 45. After the rubber ball 45 is pushed up, the steam enters the second steam guide pipe 53 through the gap between the rubber ball 45 and the fifth through hole 60, as well as the through hole of the first retaining ring 43 and the fourth through hole 56. Then, the steam flows into the bottom of the pot body through the second steam guide pipe 53 to heat the steam box 31 of the pot body. After the steam is introduced, the elastic force of the fourth spring 48 returns the rubber ball 45 to rest on the annular inner convex edge 61.

[0060] When the two-way steam valve is used as a steam outlet valve, steam is discharged from the second steam guide pipe 53, and sequentially passes through the fourth through hole 56 and the through hole of the first retaining ring 43 into the fifth through hole 60. At this time, due to the presence of the rubber ball 45, the steam cannot be discharged. When the discharged steam reaches a certain pressure, it will squeeze the first retaining ring 43 and the second valve core 44, causing the third spring 47 to be compressed. The first retaining ring 43 disengages from the sixth sealing ring 55, and the steam passes through the gap between the second valve core 44 and the fourth through hole 56, sequentially through the fourth through hole 56, the through hole of the second retaining ring 46, the through hole of the fixing cap 52, and into the first steam guide pipe 41, and is discharged from the first steam guide pipe 41. After the steam discharge is completed, the elastic force of the third spring 47 returns, tightly sealing the first retaining ring 43 and the sixth sealing ring 55.

[0061] See Figure 13 , 14In a specific embodiment of the present invention, the steam inlet valve 12 and the steam outlet valve 11 can also be a one-way steam valve. The one-way steam valve includes a third valve body 1201. A seventh through hole is provided at the center of the third valve body 1201. A fourth valve core 1211 and a plug 1212 are provided in the seventh through hole. A second spring 1203 is arranged around the outside of the fourth valve core 1211. The second spring 1203 is located between the fourth valve core 1211 and the plug 1212. A ninth through hole is provided in the plug 1212. A third air guide pipe 1214 is provided on the rear side of the third valve body 1201. A valve sleeve 1213 is provided on the outside of the third valve body 1201. A locking cap 1215 is provided on the rear outer side of the valve sleeve 1213. The third air guide pipe 1214 passes through the locking cap 1215 and communicates with the third valve body 1201. A first annular retaining plate is provided on the outer front end of the third air guide pipe 1214. The first annular retaining plate is located between the locking cap 1215 and the third valve body 1201. An eighth sealing ring 1202 is provided between the first annular plate and the third valve body 1201. A fourth air guide pipe 1209 communicating with the seventh through hole is provided at the front end of the third valve body 1201. The fourth air guide pipe 1209 can extend to the bottom of the pot body. The fourth valve core 1211 has a hollow structure, and a rubber gasket 1210 is provided at the bottom of the fourth valve core 1211. A reversing valve body 1205 is provided on the front side of the third valve body 1201. An eighth through hole is provided inside the reversing valve body 1205. A reversing valve core 1207 is provided inside the eighth through hole. A metal rod 1208 is provided on the reversing valve core 1207, and the metal rod 1208 extends out of the eighth through hole. A hole communicating with the seventh through hole is provided on the side wall of the reversing valve body 1205 facing the third valve body 1201. The fourth air guide pipe 1209 communicates with the reversing valve body 1205. A ninth sealing ring 1204 is provided between the third valve body 1201 and the reversing valve body 1205, and a tenth sealing ring 1206 is provided between the reversing valve body 1205 and the valve sleeve 1213.

[0062] See Figure 14When the one-way steam valve of the present invention is a steam inlet valve, the fourth valve core 1211 is located on the right side of the plug 1212. Its operation is as follows: Lifting the metal rod 1208 allows steam to enter the seventh through hole from the third air guide pipe 1214. The steam pressure pushes the fourth valve core 1211 to the left. The steam passes through the gap between the fourth valve core 1211 and the seventh through hole, the ninth through hole in the plug 1212, the hole on the side wall of the reversing valve body 1205, and the eighth through hole of the reversing valve body 1205, entering the fourth air guide pipe 1209. Then, through the drainage of the fourth air guide pipe 1209, it enters the bottom of the pot body to heat the steam box of the pot. After steam inlet is complete, the spring force of the second spring 1203 returns the fourth valve core 1211 to its initial position. Releasing the metal rod 1208 causes it to fall back to its initial position. When venting steam, the metal rod 1208 can be lifted, and the steam in the pot can also be discharged from the fourth steam pipe 1209, the gap between the reversing valve core 1207 and the reversing valve body 1205, and the gap between the metal rod 1208 and the reversing valve body 1205. The direction of steam in the pot is switched by the reversing valve, so as to achieve better circulation heating.

[0063] See Figure 15 When the one-way steam valve of the present invention is a venting valve, the fourth valve core 1211 is located on the left side of the plug 1212. Its operation is as follows: When the metal rod 1208 is lifted, steam is discharged from the fourth air guide pipe 1209, sequentially passing through the eighth through hole of the reversing valve body 1205, and the hole on the side wall of the reversing valve body 1205 into the seventh through hole. When the discharged steam reaches a certain pressure, it will squeeze the fourth valve core 1211, causing the second spring 1203 to be compressed. The steam passes through the gap between the fourth valve core 1211 and the seventh through hole, through the ninth through hole in the plug 1212, and enters the third air guide pipe 1214, from which it is discharged. After steam discharge is completed, the spring force of the second spring 1203 returns the fourth valve core 1211 to its initial position. Releasing the metal rod 1208 causes it to fall back to its initial position. When it is necessary to switch the direction of steam in the pot, press down the metal rod 1208. Since the reversing valve core 1207 blocks the fourth air guide pipe 1209, the steam in the pot cannot be discharged from the steam relief valve 13. The metal rod 1208 of the steam inlet valve 12 can be lifted. The steam in the pot is discharged from the reversing valve body 1205 of the steam inlet valve 12 through the gap between the fourth air guide pipe 1209 of the steam inlet valve 12, the gap between the reversing valve core 1207 and the reversing valve body 1205, and the gap between the metal rod 1208 and the reversing valve body 1205. By switching the direction of steam in the pot through the reversing valve, the purpose of better circulating heating is achieved.

[0064] See Figure 16In a specific embodiment of the present invention, a first steaming box 32 is also provided inside the steaming box 13. The first steaming box 32 is disposed inside the steaming box 13. An outward protrusion is provided on the outer side of the top of the steaming box 13, which is engaged with the outer edge of the inner liner 8. At the same time, there is an inwardly pressed groove 38 in the middle of the steaming box 13, which is used to support the first steaming box 32. A gap is left at the top of the steaming box 13 so that the gas can also heat the box body from above. A steaming box lid 15 is provided on the top of the steaming box 13.

[0065] See Figure 17 , 18 In a preferred embodiment of the present invention, a steaming rack 65 is further provided inside the inner liner 8. The steaming rack 65 includes a barrel-shaped steaming mesh with multiple steaming holes 6601 evenly distributed on the side walls and bottom of the steaming mesh. The lower part of the steaming mesh also has an inwardly pressed inner groove 6602. The steaming mesh below the inner groove 6602 can serve as a suspended support for the steaming box 13, or it can hold other steaming boxes or a heating pack for heating. A support body 6603 is also provided at the bottom of the steaming mesh. Multiple support bodies 6603 are evenly distributed at the bottom of the steaming mesh. The support body 6603 is a cylinder, a hemispherical body or a cone.

[0066] The steaming box 13 also includes a second steaming box 33. The second steaming box 33 can be set inside the first steaming box 32 or at the bottom of the steaming rack, located below the groove 6602 inside the steaming rack. Both the first steaming box 32 and the second steaming box 33 have a lunch box handle 39 on their inner upper sides.

[0067] This invention allows the steaming box 13 to be suspended on the outer edge of the inner liner 8 for heating, or the steaming box 13 to be placed inside the steaming rack and mounted above the groove 6602 in the steaming rack. The second steaming box 33 is first placed inside the inner liner 8, and then the steaming rack is placed inside the inner liner 8. The groove 6602 in the steaming rack is located above the second steaming box 33. During heating, a support body 6603 is provided at the bottom of the steaming rack, so that there is a gap between the bottom of the steaming rack and the bottom of the inner liner 8. The heated steam can enter the steaming rack through the steaming holes 6601 on the side wall of the steaming rack, or through the steaming holes 6601 at the bottom of the steaming rack, for heating and steaming.

[0068] In use, this invention utilizes steam heating. The steam inlet valve 12, a one-way valve, is opened. Steam flows through the steam inlet valve 12 and the fourth air guide pipe 1209 into the bottom of the pot, entering the bottom of the suspended steam box 13 and the gap between the outer wall of the steam box 13 and the inner wall of the inner liner 8 for heating, thus completing the heating or steaming function. After heating or steaming, the steam release valve 11, also a one-way valve, is opened. Steam enters through the fourth air guide pipe 1209 of the steam release valve 11 and flows out through the steam release valve 11. After releasing the steam, the pot lid is opened, and the steam box 13 is removed. The direction of the steam exiting the pot from the top / bottom can be controlled by using the isolation surface of the reversing valve core 1207 on the metal rod 1208 of the reversing valve to control the direction of the reversing valve body 1205 channel at the tail of the third valve body 1201.

[0069] The present invention can also be carried out by placing a heating pack. When heating, the heating pack is placed at the bottom of the inner pot 8, water is added, the steam box 13 is placed on the inner pot 8, the pot lid is covered, and heating is carried out. After heating is completed, the steam release valve 11 is opened, and steam enters from the second air guide pipe 14 of the steam release valve 11 and flows out through the steam release valve 11. After the steam is released, the pot lid is opened and the steam box 13 is taken out.

[0070] Since the steam box 13 is hot and difficult to remove after heating, the present invention can also cool the steam box 13 by pumping cold water into the inner liner through the steam inlet valve 12, making it easier to remove the steam box 13.

[0071] The technical contents of this invention and those not specifically described in the above embodiments are the same as those in the prior art.

[0072] The above are merely specific embodiments disclosed in this invention, but the scope of protection disclosed in this invention is not limited thereto. The scope of protection disclosed in this invention should be determined by the scope of the claims.

Claims

1. A steam pressure cooker with a locking structure, comprising a pot body and a lid, wherein the lid is disposed above the pot body, characterized in that: The steam pressure cooker with a locking structure also includes a steam inlet valve, a steam outlet valve, a combination valve, and a check valve. The steam inlet valve and the steam outlet valve are both located on the wall of the cooker body and communicate with the cooker body. A steam box is suspended inside the cooker body. A lid locking ring is provided on the outer side of the lid to lock the lid and the cooker body. The cooker body includes an outer liner and an inner liner. The inner liner is located inside the outer liner. An annular outer convex edge is provided on the outer side of the opening of the inner liner. Outer protrusions are spaced apart below the annular outer convex edge. An L-shaped inner convex edge is spaced apart on the inner side of the lower end of the lid locking ring to engage the outer protrusions. The lid and the inner liner... A lid sealing ring is provided between the inner pot and the inner liner. An L-shaped step is provided between the annular outer protrusion and the inner groove. The lid sealing ring is set on the L-shaped step. A steaming rack is also provided inside the inner liner. The steaming rack includes a steaming mesh. The steaming mesh is cylindrical and has steaming holes. The lower part of the steaming mesh has an inwardly pressed groove. There are multiple steaming holes, which are evenly distributed on the side walls and bottom of the steaming mesh. The groove is arranged around the inside of the steaming mesh. A support body is provided at the bottom of the steaming mesh. There are multiple support bodies, which are evenly distributed at the bottom of the steaming mesh. The support body is a cylinder, a hemisphere, or a cone.

2. The steam pressure cooker with a locking structure according to claim 1, characterized in that: Both the steam inlet valve and the steam outlet valve are bidirectional steam valves. The bidirectional steam valve includes a second valve body with a fourth through hole at its center. A second valve core is disposed within the fourth through hole. A fifth through hole is disposed at the center of the second valve core, containing a rubber ball. A first retaining ring is disposed at the front end of the fifth through hole. A fourth spring is disposed between the first retaining ring and the rubber ball. An annular inner convex edge corresponding to the shape of the rubber ball is disposed on the inner wall of the rear end of the fifth through hole. A second retaining ring is disposed at the bottom of the second valve body. A third spring is disposed between the second valve core and the second retaining ring. A first air guide tube is disposed behind the second retaining ring. A third outer convex edge is disposed on the outer side of the front end of the second valve core. The second retaining ring is located within the fourth through hole. A fourth outer convex edge is disposed on the outer side of the second retaining ring. The third spring is disposed between the third and fourth outer convex edges. A second annular boss is disposed on the inner side of the front end of the fourth through hole. The first retaining ring is embedded in the front end of the second valve body. A sixth sealing ring is disposed between the second annular boss and the first retaining ring.

3. The steam pressure cooker with a locking structure according to claim 2, characterized in that: The second valve body has a hollow fixing cap at its bottom, a second retaining ring on the fixing cap, a fourth sealing ring between the second retaining ring and the fixing cap, a pot body connecting sleeve on the outside of the second valve body, a fixing locking cap on the lower outer side of the pot body connecting sleeve, a first air guide pipe passing through the fixing locking cap and communicating with the fixing cap, an annular clamping plate on the outer side of the front end of the first air guide pipe, the annular clamping plate being located between the fixing locking cap and the fixing cap, a second air guide pipe communicating with the fourth through hole at the front end of the second valve body, a third sealing ring between the second valve body and the pot body connecting sleeve, a fifth sealing ring between the pot body connecting sleeve and the pot body, and a seventh sealing ring between the annular clamping plate and the fixing cap.

4. The steam pressure cooker with a locking structure according to any one of claims 1 to 3, characterized in that: The steam pressure cooker with locking structure also includes a combination valve and a floating stop valve. The pot lid is provided with a first through hole and a sixth through hole respectively. The combination valve is located in the first through hole, with its top and bottom extending out of the first through hole. The floating stop valve is located in the sixth through hole. The inner pot has an inwardly pressed groove below the pot opening.

5. The steam pressure cooker with a locking structure according to claim 4, characterized in that: The combined valve includes a first valve body, a valve housing, a first valve core, an inner spring, and an outer spring. The valve housing is disposed on the first valve body. A second through hole is provided at the center of the first valve body. The first valve core is disposed within the second through hole, with its top extending into the valve housing. A first outer boss is provided on the lower outer side of the first valve core. A first inner boss is provided below the second through hole of the first valve body. The first outer boss overlaps with the first inner boss. A first hole communicating with the second through hole is provided on the first valve body above the first inner boss. An inner spring is provided around the outer side of the first valve core. A spring is provided, the inner spring being located between the first outer protrusion and the valve housing. The valve housing has a first outer protrusion on its top outer side, and a second outer protrusion on its bottom outer side, located outside the bottom of the first through hole. An outer spring is arranged around the outside of the first valve body, located within the first through hole and between the first outer protrusion and the bottom of the lid. A second hole is provided on the first outer protrusion. A handle is provided above the lid locking ring, the handle being a hollow structure with one open end, and a drawer is provided inside the handle. A corresponding set is provided on the lid locking ring. A combination valve press ball is located at the top of the valve, and a first spring is arranged around the outside of the combination valve press ball. A third hole is provided at the bottom of the handle corresponding to the position of the combination valve press ball, and the combination valve press ball can extend into the third hole. The float valve includes a valve shell, a third valve core, a U-shaped rubber ring, and a through-hole bolt. A third through hole is provided inside the valve shell, and the third valve core is located in the third through hole of the valve shell, with the top of the third valve core extending outside the valve shell. The U-shaped rubber ring is located in the third through hole and below the third valve core. The bottom of the third valve core... The valve core extends into a U-shaped rubber ring. A through-hole bolt is provided at the third through hole at the bottom of the valve housing. A second outer boss is provided on the lower outer side of the third valve core. A second inner boss is provided in the middle of the third through hole of the valve housing. The third valve core overlaps with the top two sides of the U-shaped rubber ring through the second outer boss. The through-hole bolt is movably connected to the third through hole by a thread. The top of the third valve core extends out of the sixth through hole. The bottom of the through-hole bolt extends out of the sixth through hole. A fourth hole is provided at the bottom of the handle corresponding to the position of the third valve core. The third valve core can extend into the fourth hole.

6. The steam pressure cooker with a locking structure according to claim 5, characterized in that: The pot lid includes an upper lid, insulating foam, a bottom plate, and a pressing cap. The insulating foam is disposed between the upper lid and the bottom plate. A pressing cap is disposed above the upper lid to press the upper lid firmly onto the insulating foam. A first through hole is disposed on the insulating foam. The upper lid has a first upper hole positioned above the first through hole in the insulating foam. The bottom plate has a first lower hole positioned below the first through hole in the insulating foam. A combination valve is disposed within the first through hole, with its top extending outside the first upper hole and its bottom extending outside the first lower hole. An outer spring is also present. Located between the first outer protrusion and the base plate, the sixth through hole is set on the insulation foam. The upper cover is provided with a second upper hole above the sixth through hole of the insulation foam. The base plate is provided with a second lower hole below the sixth through hole of the insulation foam. The top of the third valve core extends out of the second upper hole. The bottom of the through hole bolt extends out of the second lower hole. A first sealing ring is provided between the bottom of the valve shell and the base plate. The base plate is provided with an arc-shaped concave shape at the position corresponding to the sealing ring of the pot lid. The sealing ring of the pot lid is located between the L-shaped step and the arc-shaped concave shape.

7. The steam pressure cooker with a locking structure according to claim 6, characterized in that: The outer wall of the valve housing is connected to the inner wall of the second through hole by a thread. An outer sealing ring is arranged around the outer side of the first valve body above the second outer protrusion. The outer sealing ring is located between the bottom plate and the second outer protrusion. An inner sealing ring is arranged between the first outer boss and the first inner boss. The valve housing includes a first valve housing and a second valve housing. The second valve housing is located below the first valve housing. The second valve housing and the first valve housing are movably connected by a thread. An outer edge is arranged around the top outer side of the U-shaped rubber ring. The outer edge is engaged between the second valve housing and the first valve housing. The through hole bolt is located at the bottom of the second valve housing. A first sealing ring is arranged between the bottom of the second valve housing and the bottom plate.

8. The steam pressure cooker with a locking structure according to claim 7, characterized in that: The steam inlet valve and the steam outlet valve are respectively located on the same side of the pot body. The steam pressure cooker also includes a handle, which is located on both sides of the pot body. The center of the lid locking ring and the center of the pressure cover are movably connected by a top bolt. The lid locking ring can rotate relative to the pressure cover through the top bolt. The bottom of the drawer is located at the position of the combined valve pressing bead, which is an inner arc shape.

9. The steam pressure cooker with a locking structure according to claim 8, characterized in that: One side of the pressure cap is connected to the pot body via a hinge frame and a hinge. The hinge frame is U-shaped, and the pot lid locking ring is located inside the U-shaped hinge frame. The end of the hinge connected to the hinge frame has a protrusion, and hinge shafts are respectively provided on both sides of the protrusion. The end of the hinge frame connected to the hinge has a groove, and the protrusion is engaged in the groove. On both sides of the groove, corresponding to the position of the hinge shaft, there are waist-shaped holes. The outer ends of the hinge shafts are respectively inserted into the waist-shaped holes. The contact surfaces of the bottom of the groove and the bottom of the protrusion are arc surfaces that are lower in the front and higher in the back.

10. The steam pressure cooker with a locking structure according to claim 9, characterized in that: The bottom of the pot body is provided with a bottom shell, and a lower bottom plate and an upper bottom plate are provided inside the bottom shell. A cavity is formed between the lower bottom plate and the upper bottom plate. A cylindrical shaft is horizontally provided on the outer side of the drawer facing inward. The inner side of the handle and the inner side of the hinge frame are provided with cylindrical shaft holes that can be inserted into the cylindrical shaft.

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