Self-cleaning oven and self-cleaning method

Abstract

The invention belongs to the technical field of steam ovens, and particularly relates to a self-cleaning oven and a self-cleaning method.The self-cleaning oven comprises an oven body, a steam system, a lighting system, a heat dissipation and exhaust system and a control system; the lighting system comprises a lighting lamp and a lighting lamp sealing piece, the lighting lamp sealing piece is arranged between the lighting lamp and the inner container, a lighting lamp mounting hole is formed in the inner container, the lighting lamp is provided with a mounting part and a sealing part, the lighting lamp sealing piece is made of a high-temperature-resistant material, and the lighting lamp sealing piece is provided with a first abutting part, a connecting part and a second abutting part; after the illuminating lamp is mounted in the illuminating lamp mounting hole of the inner container through the mounting part, the first abutting part abuts against the edge of the illuminating lamp mounting hole, and the second abutting part abuts against the sealing part, so that a gap between the illuminating lamp and the side wall of the illuminating lamp mounting hole is sealed; the sealing element of the illuminating lamp is made of a high-temperature-resistant material, so that melting or aging of the sealing element caused by too high temperature in the inner container can be avoided, the sealing effect is ensured, and normal operation of the steaming oven and stable work of the illuminating lamp are ensured.

Description

Technical Field

[0001] The present technical solution relates to the technical field of steam ovens, and particularly refers to a self-cleaning oven and a self-cleaning method. Background Art

[0002] A steam oven is equipped with a steam system on the basis of a traditional oven. This system mainly consists of a water tank, an evaporator, and a series of ducts. When the user selects the steam function, the water in the water tank flows into or is pumped to the evaporator, and the evaporator then starts to work, generating water vapor. This water vapor enters the inner cavity through the ducts to heat and steam the food or clean the inner wall of the inner cavity.

[0003] The existing steam ovens have relatively single functions. Generally, they only have the steam cleaning function and do not have the high-temperature self-cleaning function. If the high-temperature self-cleaning function is added to an existing ordinary steam oven, during the high-temperature cleaning process, the internal temperature of the oven can reach as high as more than 450 degrees Celsius. However, the seals inside the inner cavity of the existing steam ovens are made of rubber materials. Such seals are prone to high-temperature aging problems in a high-temperature environment, which may lead to air leakage inside the inner cavity, such as between the inner cavity and the lighting lamp, and between the inner cavity and the air inlet pipe. When the oven is working, the high-temperature gas will leak from the aged seals, affecting the working stability of the electronic components outside the inner cavity and reducing the overall working stability of the oven. Summary of the Invention

[0004] The purpose of the present technical solution is to provide a self-cleaning oven and a self-cleaning method. By providing a lighting lamp seal between the lighting lamp and the inner cavity, and achieving sealing through the abutting part one abutting against the edge of the lighting lamp mounting hole and the abutting part two abutting against the sealing part, it improves the problem that the rubber seal ages due to the high temperature inside the inner cavity and results in poor sealing between the lighting lamp and the inner cavity.

[0005] The purpose of the present technical solution is achieved as follows:

[0006] A self-cleaning oven, comprising: a box body having at least an inner container, a cavity for heating food being formed inside the inner container; a steam system installed inside the box body for supplying steam into the inner container and heating the food; a lighting system installed inside the box body for illuminating the inside of the inner container; a heat dissipation and exhaust system installed inside the box body for dissipating heat and exhausting air from the inner container; and a control system installed inside the box body for controlling the operation of the steam system, the lighting system and the heat dissipation and exhaust system; wherein, the lighting system includes a lighting lamp and a lighting lamp seal, the lighting lamp seal is arranged between the lighting lamp and the inner container, a lighting lamp installation hole is formed on the inner container, the lighting lamp has an installation part and a sealing part, the lighting lamp seal is made of a high-temperature resistant material, the lighting lamp seal has a first abutting part, a connecting part and a second abutting part, the first abutting part is arranged at one end of the connecting part, and the second abutting part is arranged at the other end of the connecting part; when the lighting lamp is installed into the lighting lamp installation hole of the inner container through the installation part, the first abutting part abuts against the edge of the lighting lamp installation hole, and the second abutting part abuts against the sealing part, so as to seal the gap between the lighting lamp and the side wall of the lighting lamp installation hole.

[0007] Preferably, the connecting part has elasticity; and / or, both the first abutting part and the second abutting part have elasticity; when the lighting lamp is installed into the inner container, the lighting lamp seal undergoes elastic deformation, so that the first abutting part abuts against the edge of the lighting lamp installation hole, and the second abutting part abuts against the end face of the sealing part.

[0008] Preferably, the high-temperature resistant material for making the lighting lamp seal is a metal material or a graphene material.

[0009] Preferably, the lighting lamp seal is in the shape of a hollow frustum, the connecting part forms the side wall of the hollow frustum, the first abutting part forms one end of the hollow frustum, and the second abutting part forms the other end of the hollow frustum; the end face of the first abutting part is parallel and fits with the edge of the lighting lamp installation hole; the end face of the second abutting part is parallel and fits with the end face of the sealing part.

[0010] Preferably, the steam system includes a boiler device, the boiler device includes an air inlet pipe leading to the inside of the inner container for supplying steam; an air inlet pipe installation hole is formed on the inner container, the air inlet pipe is inserted through the air inlet pipe installation hole, and a connecting piece is arranged at the end of the air inlet pipe, an air inlet pipe seal is arranged between the connecting piece and the side wall of the inner container, the air inlet pipe seal is a metal material or a graphene material; the connecting piece and the inner container are connected through an air inlet pipe fixing component, so that the connecting piece presses the air inlet pipe seal against the inner container located at the edge of the air inlet pipe installation hole, so as to seal the gap between the air inlet pipe and the inner container.

[0011] Preferably, the steam system includes a boiler device, and the boiler device includes a main outlet pipe leading to the inside of the inner tank; an installation hole for the main outlet pipe is provided on the inner tank, the main outlet pipe is installed on the installation hole for the main outlet pipe, the main outlet pipe is provided with a limiting protrusion, and a sealing member for the main outlet pipe is provided between the limiting protrusion and one side of the inner tank. The sealing member for the main outlet pipe is made of a metal material or a graphene material. The main outlet pipe is connected with a fixing member for the main outlet pipe, and the fixing member for the main outlet pipe abuts against the other side of the inner tank. Through the fixing member for the main outlet pipe, the limiting protrusion presses the sealing member for the main outlet pipe against the inner tank located at the edge of the installation hole for the main outlet pipe, so as to seal the gap between the main outlet pipe and the inner tank.

[0012] Preferably, the steam system includes a boiler device, and the boiler device includes a pressure balance pipe leading to the inside of the inner tank; a top installation hole is provided on the inner tank, and the pressure balance pipe is installed in the top installation hole; the pressure balance pipe is provided with a top fixing piece, and a top sealing member is arranged between the top fixing piece and the side wall of the inner tank. The top sealing member is made of a metal material or a graphene material. The top fixing piece is connected with the side wall of the inner tank through a top fixing member, so that the top fixing piece presses the top sealing member against the inner tank located at the edge of the top installation hole, thereby sealing the gap between the pressure balance pipe and the inner tank.

[0013] Preferably, the heating pipe system is installed in the box body and connected to the control system for heating the food in the cavity; the heating pipe system includes: a top layer heating pipe located above the cavity; the rear end of the top layer heating pipe extends out of the cavity and is connected to the control system; a top fixing piece is arranged in the cavity, and a top sealing member is arranged between the top fixing piece and the inner wall of the cavity. The top sealing member is made of a metal material or a graphene material. The inner tank is connected with the top fixing piece through a top fixing member, so that the top fixing piece presses the top sealing member against the inner tank located at the edge of the top installation hole, thereby sealing the gap between the top layer heating pipe and the inner tank.

[0014] Preferably, the heat dissipation and exhaust system includes: an exhaust cylinder, on which an exhaust hole one and a fixing part are provided. The exhaust hole one is used for exhausting steam. An exhaust hole two and an exhaust cylinder installation hole are provided on the inner tank, and the edge of the exhaust hole two extends towards the outside of the inner tank to form a guiding part. The exhaust cylinder is installed on the guiding part through the exhaust hole one. The end of the exhaust cylinder fixing member passes through the exhaust cylinder installation hole and is connected to the fixing part, so as to install the exhaust cylinder on the inner tank. And an exhaust cylinder sealing member is arranged between the exhaust cylinder fixing member and the edge of the exhaust cylinder installation hole. The exhaust cylinder sealing member is made of a metal material or a graphene material, and is used for sealing the gap between the exhaust cylinder fixing member and the exhaust cylinder installation hole.

[0015] A self-cleaning method for a self-cleaning oven, comprising the following steps: Step 1: Adjust the temperature inside the cavity to 120 degrees Celsius through the heating tube system, and at the same time supply steam into the cavity through the boiler device; or, adjust the temperature inside the cavity to 450 degrees Celsius through the heating tube system; or, adjust the temperature inside the cavity to 450 degrees Celsius through the heating tube system, and at the same time supply steam into the cavity through the boiler device; Step 2: When the grease attached to the inner liner is carbonized, wipe the inner wall of the inner liner manually.

[0016] The prominent and beneficial technical effects of this technical solution compared with the prior art are:

[0017] 1. In this technical solution, the designed lighting lamp seal is made of high-temperature resistant material. The lighting lamp seal can prevent the lighting lamp seal from melting due to the too high temperature inside the inner liner. At the same time, the lighting lamp seal has a first abutting part, a connecting part and a second abutting part. During the installation process, when the lighting lamp seal is placed between the lighting lamp installation hole and the sealing part, the first abutting part abuts against the edge of the lighting lamp installation hole, and the second abutting part abuts against the sealing part, thereby sealing the gap between the side wall of the lighting lamp installation hole and the lighting lamp, ensuring the sealing effect, preventing the high-temperature water vapor inside the inner liner from entering the lighting lamp, and ensuring the normal operation of the steam oven and the stable operation of the lighting lamp.

[0018] 2. In the part of the air inlet pipe located inside the cavity in this technical solution, there is a connecting piece, and an air inlet pipe seal is provided between the connecting piece and the inner wall of the cavity. The gap between the air inlet pipe and the cavity is sealed through the air inlet pipe seal, thereby avoiding air leakage of the inner liner and ensuring the stability of the inner liner during operation.

[0019] 3. The designed main water outlet pipe in this technical solution has a limiting protrusion, and a main water outlet pipe seal is provided between the limiting protrusion and the inner wall of the inner liner, realizing the sealing of the gap between the main water outlet pipe and the inner liner, and ensuring the stability of the main water outlet pipe and the inner liner during operation.

[0020] 4. In this technical solution, the designed air pressure balance pipe is connected to the top fixing piece, and a top seal is provided between the top fixing piece and the inner wall of the cavity, thereby ensuring the sealing performance between the air pressure balance pipe and the inner liner.

[0021] 5. In this technical solution, the heating tube system and the boiler device are cooperated to carbonize the oil stains attached to the inner wall of the inner liner at high temperature, thereby realizing the self-cleaning of the inside of the inner liner and ensuring the cleanliness and hygiene inside the inner liner. Description of the Drawings

[0022] Figure 1 is the structural schematic diagram of this technical solution.

[0023] Figure 2 is the sectional view of this technical solution.

[0024] Figure 3 is Figure 2 an enlarged view of part A in

[0025] Figure 4 a sectional view of the lighting fixture seal of this technical solution.

[0026] Figure 5 is Figure 2 an enlarged view of part B in

[0027] Figure 6 a sectional view of the exhaust pipe of this technical solution after being installed into the inner tank.

[0028] Figure 7 an exploded view of the inner tank and the heating pipe system of this technical solution.

[0029] Figure 8 one of the exploded views of the rear side wall of the inner tank of this technical solution.

[0030] Figure 9 another exploded view of the rear side wall of the inner tank of this technical solution.

[0031] Figure 10 a sectional view in the horizontal direction of the intake pipe of this technical solution after being installed into the inner tank.

[0032] Figure 11 a sectional view in the vertical direction of the intake pipe of this technical solution after being installed into the inner tank.

[0033] Figure 12 a sectional view of the main outlet pipe of this technical solution after being installed into the inner tank.

[0034] Figure 13 a sectional view of the top heating pipe and the air pressure balance pipe of this technical solution after being installed into the inner tank.

[0035] Figure 14 a structural schematic diagram of the rear side of the inner tank and the boiler device of this technical solution.

[0036] Reference Numerals: 1, housing; 11, door panel; 12, inner tank; 121, cavity; 122, mounting hole for lighting lamp; 123, second exhaust hole; 124, guiding portion; 125, mounting surface; 126, mounting hole for intake pipe; 127, mounting hole for main water outlet pipe; 128, top mounting hole; 129, mounting hole for exhaust cylinder; 13, switch board; 14, touch screen; 21, top heating pipe; 22, inner heating pipe; 23, outer heating pipe; 24, back heating pipe; 25, fan assembly; 26, baffle; 27, ventilation hole; 28, counterbore; 29, slope; 3, water tank device; 4, boiler device; 41, water inlet pipe; 411, shunt pipe; 412, first water outlet pipe; 413, second water outlet pipe; 42, boiler assembly; 43, steam separator; 44, main water outlet pipe; 441, limiting projection; 442, main water outlet pipe seal; 443, main water outlet pipe fixing member; 45, intake pipe; 451, air outlet hole; 452, baffle plate; 453, ventilation area; 454, connecting piece; 455, intake pipe seal; 456, anti - detachment member two; 457, intake pipe fixing member one; 458, intake pipe fixing member two; 46, air pressure balance pipe; 461, top seal; 47, top fixing piece; 471, anti - detachment member four; 472, top fixing member one; 473, top fixing member two; 5, lighting lamp; 51, mounting portion; 52, sealing portion; 53, lighting lamp seal; 54, connecting portion; 55, abutting portion one; 56, abutting portion two; 57, anti - slip portion; 6, heat dissipation and exhaust system; 61, fan; 62, heat dissipation cover plate; 63, heat dissipation bottom plate; 631, air inlet; 64, exhaust cylinder; 641, first exhaust hole; 642, fixing portion; 643, exhaust cylinder fixing member; 644, exhaust cylinder seal; 65, heat dissipation channel. Detailed Embodiments

[0037] The following further elaborates on the detailed embodiments of the present technical solution in conjunction with the attached drawings. See Figures 1 - 14 .

[0038] Embodiment 1:

[0039] As Figure 1As shown in the figure, a self-cleaning oven includes: a box body, a heating tube system, a steam system, a lighting system, a heat dissipation and exhaust system 6, and a control system; the box body includes an inner container 12, and a cavity 121 for heating food is formed inside the inner container 12; the steam system is installed inside the box body and is used to supply steam into the inner container 12 and heat the food; the heating tube system is installed on the inner container 12 and is controlled by the control system to heat the food in the cavity 121; the lighting system is installed on the inner container 12 and is placed inside the cavity 121 for illuminating the inside of the cavity 121; the heat dissipation and exhaust system 6 is installed above the inner container 12 and is used to dissipate heat and exhaust air inside the inner container 12, and discharge the gas inside the inner container 12 from the box body; the control system is arranged inside the box body and is used to control the steam system, the heating tube system, the lighting system, and the heat dissipation and exhaust system 6 to work.

[0040] Combined with Figure 1 and Figure 2 , the box body includes: a housing 1, a door panel 11, an inner container 12, and a switch panel 13. The door panel 11 is hinged to the bottom of the front end of the housing 1; the inner container 12 is arranged inside the housing 1, and a cavity 121 for heating food is formed inside the inner container 12; the switch panel 13 is installed on the housing 1 and is located above the door panel 11. The switch panel 13 is provided with a touch screen 14 for users to start, close, and select modes, etc.

[0041] Combined with Figures 2 - 4 , the lighting system includes a lighting lamp 5 and a lighting lamp seal 53. A lighting lamp mounting hole 122 is opened on the top or side wall of the inner container 12; the lighting lamp 5 has a mounting portion 51 and a sealing portion 52, and the mounting portion 51 is inserted into and connected to the lighting lamp mounting hole 122; a lighting lamp seal 53 is installed between the inner container 12 and the lighting lamp 5. The lighting lamp seal 53 is made of a high-temperature resistant material. The lighting lamp seal 53 has a first abutting portion 55, a connecting portion 54, and a second abutting portion 56. The first abutting portion 55 is arranged at one end of the connecting portion 54, and the second abutting portion 56 is arranged at the other end of the connecting portion 54; when the lighting lamp seal 53 is sleeved on the mounting portion 51 and the lighting lamp 5 is installed on the inner container 12, the first abutting portion 55 abuts against the edge of the lighting lamp mounting hole 122, and the second abutting portion 56 abuts against the sealing portion 52 to seal the gap between the lighting lamp 5 and the side wall of the lighting lamp mounting hole 122.

[0042] The top or side wall of the inner container 12 is inclined towards its center to form a mounting surface 125, that is, the mounting surface 125 is inclined towards the center of the cavity 121. The lighting lamp mounting hole 122 is opened on the mounting surface 125, and the first abutting portion 55 abuts against the mounting surface 125 at the edge of the lighting lamp mounting hole 122.

[0043] When the lighting lamp seal 53 is applied in a steam oven, during steaming, baking or high-temperature self-cleaning of the steam oven, the internal temperature of the inner container 12 can reach as high as over 450 °C. At this time, the melting point of the high-temperature resistant material used for the lighting lamp seal 53 is not lower than 450 °C, so that the lighting lamp seal 53 will not age or deform due to high temperature.

[0044] When the lighting lamp seal 53 is applied in an ordinary oven, when the oven is baking food, the internal temperature of the inner container 12 can reach over 200 °C. At this time, the melting point of the high-temperature resistant material used for the lighting lamp seal 53 is not lower than 200 °C, so that the lighting lamp seal 53 will not age or deform due to high temperature.

[0045] The high-temperature resistant material for making the lighting lamp seal 53 is made of metal material or graphene material.

[0046] Furthermore, the metal material for making the lighting lamp seal 53 is made of stainless steel material, nickel-based alloy or cobalt-based alloy, and the lighting lamp seal 53 is preferably made of stainless steel material.

[0047] The lighting lamp seal 53 is in the shape of a hollow frustum. The connecting part 54 forms the side wall of the hollow frustum, the first abutting part 55 forms one end of the hollow frustum, and the second abutting part 56 forms the other end of the hollow frustum; the connecting part 54 is inclined, that is, the angle α between the connecting part 54 and the first abutting part 55 is an obtuse angle, and the angle β between the connecting part 54 and the second abutting part 56 is an obtuse angle. When the lighting lamp seal 53 is installed between the inner container 12 and the lighting lamp 5, when the sealing part 52 and the lighting lamp mounting hole 122 approach each other, the stability of the first abutting part 55 abutting against the edge of the lighting lamp mounting hole 122 and the stability of the second abutting part 56 abutting against the sealing part 52 are ensured.

[0048] The end face of the first abutting part 55 is parallel and fitted with the edge of the lighting lamp mounting hole 122 to ensure the sealing performance between the first abutting part 55 and the edge part of the lighting lamp mounting hole 122; the end face of the second abutting part 56 is parallel and fitted with the end face of the sealing part 52 to ensure the sealing performance between the second abutting part 56 and the sealing part 52.

[0049] The connecting part 54 has the characteristic of elastic deformation, that is, it has elasticity. When the lighting lamp 5 is installed in the inner container 12, the connecting part 54 undergoes elastic deformation, so that the first abutting part 55 abuts against the edge of the lighting lamp mounting hole 122, and the second abutting part 56 abuts against the end face of the sealing part 52, realizing the sealing of the gap between the lighting lamp mounting hole 122 and the lighting lamp 5, preventing the high-temperature water vapor in the inner container 12 from entering the lighting lamp 5 through the gap, and ensuring the normal operation of the lighting lamp 5.

[0050] The abutting part one 55, the connecting part 54 and the abutting part two 56 are integrally formed by stamping, welding or extrusion.

[0051] The sealing part 52 is a boss provided on the outer peripheral side of the lighting lamp 5. The abutting part two 56 abuts against the end face of the boss. The diameter of the boss is larger than the diameter of the mounting part 51, and at the same time, the diameter of the boss is larger than the diameter of the lighting lamp mounting hole 122.

[0052] A threaded part is provided on the outer side wall of the mounting part 51, and it is threadedly connected to the lighting lamp mounting hole 122 through the threaded part.

[0053] A plurality of anti-slip parts 57 are circumferentially provided on the lighting lamp 5. The anti-slip parts 57 are anti-slip grooves, anti-slip protrusions, anti-slip bumps or ribs perpendicular to the rotation direction of the lighting lamp 5, and are used to assist the user in screwing the lighting lamp 5 tightly onto the inner container 12.

[0054] The lighting lamp 5 includes a housing and a light-emitting element. The housing is made of a transparent or semi-transparent material, such as transparent glass or transparent plastic material. A receiving cavity is provided inside the housing for receiving the light-emitting element. The light-emitting element is a light bulb or a diode, etc.

[0055] Combined Figure 14 , the steam system includes: a water tank device 3 and a boiler device 4. The water tank device 3 is installed above the inner container 12 to provide the moisture required by the box body; the boiler device 4 is installed at the rear side of the inner container 12 to convert the water in the water tank device 3 into steam and supply it into the inner container 12, so as to heat the food.

[0056] Combined Figures 7 - 14 , the boiler device 4 includes a water inlet pipe 41 connected to the water tank device 3, a boiler assembly 42, a steam separator 43 and a main water outlet pipe 44. An air inlet pipe 45 leading to the inside of the inner container 12 is provided on the steam separator 43; a shunt pipe 411 is provided at the water outlet end of the water inlet pipe 41. A first water outlet pipe 412 and a second water outlet pipe 413 that communicate with each other are provided on the shunt pipe 411. The first water outlet pipe 412 communicates with the boiler assembly 42, and the boiler assembly 42 communicates with the steam separator 43. The second water outlet pipe 413 is connected to the main water outlet pipe 44 leading to the inside of the inner container 12; a throttle valve is provided between the water inlet pipe 41 and the shunt pipe 411 for opening the water inlet pipe to allow water to flow in. A water outlet valve is provided between the second water outlet pipe 413 and the main water outlet pipe 44 for opening and closing the water outlet pipe to allow the waste water to flow out; the main function of the boiler device is to heat and evaporate the water entering the boiler assembly to form steam, and then the gas is input into the inner container through the steam separator to steam the food. The air pressure balance pipe is used to balance the air pressure inside the boiler device and plays a good protective role.

[0057] The front end of the intake pipe 45 extends into the cavity 121 of the inner container 12 and is provided with an air outlet hole 451. At the air outlet hole 451, there is a baffle 452 that can block water droplets inside the intake pipe 45. The lower half of the baffle 452 is integrally connected with the end of the air outlet hole 451, that is, the baffle 452 is welded or extruded into one body with the end of the air outlet hole 451 or directly integrally formed. There is a ventilation area 453 for gas to pass through between the upper half of the baffle 452 and the edge of the air outlet hole 451. When steam enters the cavity of the inner container 12 through the intake pipe 45, some small water droplets remaining in the steam will be blocked by the baffle 452, preventing them from entering the inner container 12 along with the gas. And these water droplets can accumulate and then flow back to the steam separator through the intake pipe 45, so that this water can be reused.

[0058] Combined Figures 8 - 10 , an intake pipe installation hole 126 is provided on the inner container 12. The intake pipe 45 is inserted into the intake pipe installation hole 126. The front end of the intake pipe 45 is placed inside the inner container 12, and the rear end of the intake pipe 45 extends out of the inner container 12 through the intake pipe installation hole 126. A connecting piece 454 is provided on the outer side wall of the front end of the intake pipe 45. The connecting piece 454 is integrally formed or welded with the intake pipe 45. The connecting piece 454 is connected to the inner side wall of the cavity 121 of the inner container 12 through an intake pipe fixing component, and an intake pipe seal 455 is provided between the connecting piece 454 and the inner side wall of the cavity 121. The intake pipe seal 455 is made of a metal material or a graphene material, specifically an aluminum or stainless steel material, and is used to seal the gap between the intake pipe 45 and the inner container 12. After the connecting piece 454 is installed on the inner container 12 through the intake pipe fixing component, the connecting piece 454 presses the intake pipe seal 455 against one side wall of the inner container 12, causing the intake pipe seal 455 to deform, thereby sealing the gap between the connecting piece 454 and the inner side wall of the cavity 121 located at the edge of the intake pipe installation hole 126, and further sealing the gap between the intake pipe 45 and the intake pipe installation hole 126, ensuring the sealing effect.

[0059] The intake pipe fixing component includes an intake pipe fixing part one 457 and an intake pipe fixing part two 458. The intake pipe fixing part one 457 is integrally stamped or welded with the connecting piece 454. The end of the intake pipe fixing part one 457 sequentially passes through the intake pipe seal 455 and the side wall of the inner container 12 and is threadedly connected to the intake pipe fixing part two 458. The intake pipe fixing part one 457 causes the connecting piece 454 to press the intake pipe seal 455 against one side wall of the inner container 12, and causes the intake pipe fixing part two 458 to abut against the other side wall of the inner container 12.

[0060] Further, an anti - detachment member two 456 is provided between the outer side wall of the inner tank 12 and the intake pipe fixing member two 458. That is, the intake pipe fixing member one 457 passes through the connecting piece 454, the inner tank 12, and the anti - detachment member two 456 in sequence and is connected to the intake pipe fixing member two 458, so that the anti - detachment member two 456 abuts against one side edge of the intake pipe mounting hole 126, and the connecting piece 454 makes the intake pipe seal 455 abut against the other side edge of the intake pipe mounting hole 126.

[0061] Combined Figures 9 - 12 , the total water outlet pipe 44 includes: a pipe joint and a pipe body. The pipe body is connected to the second water outlet pipe 413. The pipe joint is made of a metal material, that is, the pipe joint of the total water outlet pipe 44 is made of stainless steel material, and the pipe body can be made of a metal material or a plastic material.

[0062] There is a space between the pipe body of the total water outlet pipe 44 and the outer rear wall of the inner tank 12. A total water outlet pipe mounting hole 127 is provided on the inner tank 12. The front end of the total water outlet pipe 44 extends into the inner tank 12. The rear end of the total water outlet pipe 44 passes through the total water outlet pipe mounting hole 127 and is connected to the second water outlet pipe 413. A limiting protrusion 441 is provided on the part of the total water outlet pipe 44 located in the cavity 121. The diameter of the limiting protrusion 441 is larger than the diameter of the total water outlet pipe mounting hole 127. A total water outlet pipe seal 442 is provided between the limiting protrusion 441 and the inner side wall of the inner tank 12. The total water outlet pipe seal 442 is made of a metal material or a graphene material, specifically an aluminum sheet or a stainless steel sheet. The total water outlet pipe seal 442 is pressed against the inner side wall of the inner tank 12 by the limiting protrusion 441 to seal the gap between the total water outlet pipe 44 and the inner tank 12. That is, the total water outlet pipe seal 442 is squeezed by the limiting protrusion 441 and the edge of the total water outlet pipe mounting hole 127, so that the total water outlet pipe seal 442 is deformed, thereby sealing the gap between the limiting protrusion 441 and the edge of the total water outlet pipe mounting hole 127, and further sealing the gap between the outer side wall of the total water outlet pipe 44 and the side wall of the total water outlet pipe mounting hole 127. A total water outlet pipe fixing member 443 is connected to the part of the total water outlet pipe 44 located outside the inner tank 12. The total water outlet pipe fixing member 443 is a nut. The total water outlet pipe fixing member 443 is thread - connected to the total water outlet pipe 44. The total water outlet pipe fixing member 443 abuts against the outer side wall of the inner tank 12, that is, against the edge of the total water outlet pipe mounting hole 127. Through the total water outlet pipe fixing member 443, the limiting protrusion 441 presses the total water outlet pipe seal 442 against the inner tank 12 located at the edge of the total water outlet pipe mounting hole 127. Specifically, the limiting protrusion 441 makes the total water outlet pipe seal 442 abut against one side edge of the total water outlet pipe mounting hole 127, and the total water outlet pipe fixing member 443 abuts against the other side edge of the total water outlet pipe mounting hole 127, so as to realize the installation between the total water outlet pipe 44 and the inner tank 12.

[0063] Combined Figure 8 、Figure 9 and Figure 13 , a pressure balance pipe 46 leading to the inside of the inner tank 12 is connected to the shunt pipe 411 near its water inlet end. A top mounting hole 128 is provided on the inner tank 12. The front end of the pressure balance pipe 46 is inserted into the inner tank 12 through the top mounting hole 128. A top fixing piece 47 is provided on the part of the pressure balance pipe 46 located inside the inner tank 12. The top fixing piece 47 and the pressure balance pipe 46 are integrally formed, welded or stamped. The top fixing piece 47 is connected to the inner side wall of the cavity 121 of the inner tank 12 through a top fixing component. A top seal 461 is provided between the top fixing piece 47 and the inner side wall of the cavity 121. The top seal 461 is made of a metal material or a graphene material. The top seal 461 is an aluminum sealing sheet or a stainless steel sealing sheet. The top fixing piece 47 presses the top seal 461 against the inner side wall of the inner tank 12 to seal the gap between the pressure balance pipe 46 and the inner tank 12, that is, the top seal 461 is pressed by the top fixing piece 47 and the edge of the top mounting hole 128, causing the top seal 461 to deform, so as to seal the gap between the top fixing piece 47 and the edge of the top mounting hole 128, and further seal between the inner tank 12 and the pressure balance pipe 46.

[0064] The top fixing component includes a first top fixing piece 472 and a second top fixing piece 473. The first top fixing piece 472 is integrally stamped or welded with the top fixing piece 47. The end of the first top fixing piece 472 passes through the top seal 461 and the side wall of the inner tank 12 in sequence and is threadedly connected to the second top fixing piece 473. The first top fixing piece 472 makes the top fixing piece 47 press the top seal 461 against one side wall of the inner tank 12, and makes the second top fixing piece 473 press against the other side wall of the inner tank 12.

[0065] Further, an anti - detachment piece four 471 is provided between the outside of the inner tank 12 and the second top fixing piece 473. Specifically, the first top fixing piece 472 passes through the top fixing piece 47, the inner tank 12, the anti - detachment piece four 471 and is connected to the second top fixing piece 473. The second top fixing piece 473 makes the anti - detachment piece four 471 press against the edge on one side of the top mounting hole 128, and the first top fixing piece 472 makes the top fixing piece 47 press the top seal 461 against the edge on the other side of the top mounting hole 128.

[0066] Combined with Figures 7 - 9 and Figure 13 , the heating pipe system includes: a top - layer heating pipe 21 located above the cavity 121, an inner heating pipe 22, an outer heating pipe 23 located under the inner tank 12, and a back heating pipe 24 located on the inner side wall of the cavity 121. The inner heating pipe 22, the outer heating pipe 23 and the back heating pipe 24 are electrically connected to a control system;

[0067] The rear end of the top heating pipe 21 extends out of the cavity 121 and is connected to the control system; a top fixing piece 47 is arranged in the cavity 121, and the top heating pipe 21 is welded or integrally formed with the top fixing piece 47. A top seal 461 is arranged between the top fixing piece 47 and the inner side wall of the cavity 121. The top seal 461 is made of a metal material or a graphene material, and the top seal 461 is an aluminum seal piece or a stainless steel seal piece. The inner container 12 is connected to the top fixing piece 47 through a top fixing assembly, so that the top fixing piece 47 presses the top seal 461 against the inner container 12 at the edge of the top mounting hole 128, that is, the top seal 461 is pressed against the inner side wall of the inner container 12 through the top fixing piece 47 to seal the gap between the top heating pipe 21 and the inner container 12. Both the top heating pipe 21 and the air pressure balance pipe 46 are connected and fixed to the inside of the inner container 12 through the top fixing piece 47, and both are sealed through the top seal 461. Or the top heating pipe 21 and the air pressure balance pipe 46 are separately designed, that is, they are not arranged on the same top fixing piece 47. When separately designed, the top heating pipe 21 and the air pressure balance pipe 46 are respectively installed into different top mounting holes 128 on the inner container 12 through their respective corresponding top fixing pieces 47 and top seals 461.

[0068] Combined Figure 7 and Figure 8 , a blower assembly 25 is arranged in the middle of the back heating pipe 24 on the inner container 12. A baffle 26 is arranged outside the blower assembly 25 and the back heating pipe 24. The baffle 26 is fixed on the inner container 12, and a plurality of ventilation holes 27 are formed in the baffle 26; the blower assembly 25 includes a motor and a fan. The motor is arranged on the outer side wall at the back of the inner container 12, the driving end of the motor extends into the inner part of the inner container 12 and is connected to the fan, and the fan is placed inside the inner container 12.

[0069] A sunken platform 28 is formed by the downward depression of the bottom of the inner container 12. A slope 29 extends from the periphery of the sunken platform 28 to the bottom side of the bottom of the inner container 12. The inner heating pipe 22 is located at the bottom of the sunken platform 28, and the outer heating pipe 23 is located at the bottom of the slope 29; the slope 29 slopes downward towards the sunken platform 28, facilitating the condensation water to flow into the sunken platform 28. The inner heating pipe 22 is located at the bottom of the sunken platform 28 and can be used to heat the condensation water flowing into the sunken platform 28 to form steam for heating food, so that the condensation water can be fully utilized. The outer heating pipe 23 is located on the outer periphery of the inner heating pipe 22, that is, at the bottom of the slope 29. The inner container 12 includes a top surface, a left side surface, a right side surface, a bottom surface and a rear side surface. The left side surface, the right side surface and the bottom surface are integrally formed. The top surface is covered above the left side surface and the right side surface, and the rear side surface is connected to the top surface, the left side surface and the right side surface.

[0070] The inner heating tube 22, the outer heating tube 23 and the inner end of the top heating tube 21 are connected to the electronic control board installed on the upper side of the inner tank 12 and can be controlled separately or in combination by the electronic control board. Among them, the power of the outer heating tube 23 is greater than that of the inner heating tube 22. When ordinary heating mode is needed for baking, the outer heating tube can be used alone for baking; when steaming food, since condensate is likely to be generated, the inner heating tube can be used to heat and dry the moisture on the bottom surface; or for some foods that need low-temperature auxiliary baking heating, the inner heating tube heating method can be used for auxiliary baking.

[0071] A fixing plate is provided below the bottom of the inner tank 12. A lower heating area is formed between the fixing plate and the inner tank 12. A buckle edge is formed on the front side of the fixing plate, and a buckle groove is formed on the bottom of the inner tank 12. The buckle edge is clamped in the buckle groove. Bottom fixing pieces for fixing the inner heating tube 22 and the outer heating tube 23 are provided on the rear side of the fixing plate; top fixing pieces 47 for fixing the top heating tube 21 are provided on the inner side wall of the top of the inner tank 12.

[0072] Combined Figure 2 、 Figure 5 and Figure 6 and, the heat dissipation and exhaust system 6 includes: a fan 61, a heat dissipation cover plate 62, a heat dissipation bottom plate 63, and an exhaust cylinder 64 provided between the upper side of the inner tank 12 and the housing 1. A heat dissipation channel 65 is formed between the heat dissipation cover plate 62 and the heat dissipation bottom plate 63.

[0073] A through hole one is opened in the middle of the heat dissipation cover plate 62. A fan support is provided on the through hole one. A number of ventilation openings are provided on the fan support. When the fan rotates, it can drive the surrounding cold air to enter along the ventilation openings to cool the hot air. A motor support is provided in the middle of the fan support. A fan motor is installed on the motor support. The output shaft of the fan motor passes through the fan support and is connected to the fan 61. The fan motor drives the fan 61 to rotate; an air inlet 631 is opened on the heat dissipation bottom plate 63 located below the fan 61. A door panel support for installing the door panel 11 is provided on the front side of the inner tank 12. An air outlet is opened above the door panel 11 on the upper side of the door panel support. The air outlet is communicated with the heat dissipation channel 65. The hot air generated during the operation of the oven enters the heat dissipation channel 65 from the air inlet 631 for cooling and is discharged from the air outlet.

[0074] The exhaust pipe 64 is provided with a first exhaust hole 641 and a fixing part 642. The steam discharged from the first exhaust hole 641 is discharged from the heat dissipation channel 65 through the air inlet 631. The inner tank 12 is provided with a second exhaust hole 123 and an exhaust pipe mounting hole 129. The edge of the second exhaust hole 123 extends towards the outside of the inner tank 12 to form a guiding part 124. The guiding part 124 is inserted into the first exhaust hole 641. The end of the exhaust pipe fixing member 643 passes through the exhaust pipe mounting hole 129 and is connected to the fixing part 642, so as to install the exhaust pipe 64 on the inner tank 12. The exhaust pipe fixing member 643 is a screw or a bolt or a plug. The rear end of the exhaust pipe fixing member 643 has an anti-detachment protrusion. An exhaust pipe seal 644 is arranged between the anti-detachment protrusion and the edge of the exhaust pipe mounting hole 129. The exhaust pipe seal 644 is made of a metal material or a graphene material. The exhaust pipe seal 644 is an aluminum sheet or a stainless steel sheet, which is used to seal the gap between the exhaust pipe fixing member 643 and the exhaust pipe mounting hole 129. The exhaust pipe 64 is located outside the inner tank 12. The end of the exhaust pipe fixing member 643 extends out of the inner tank 12 through the exhaust pipe mounting hole 129 from the inside of the inner tank 12 and is threadedly connected or interference-fitted with the fixing part 642. The anti-detachment protrusion is located inside the inner tank 12 and presses the exhaust pipe seal 644 against the inner side wall of the inner tank 12, specifically against the edge of the exhaust pipe mounting hole 129, so as to prevent gas from leaking between the inner tank 12 and the housing 1.

[0075] For the specific structure of the water tank device 3, reference can be made to Chinese Patent CN202021452197.X, which will not be elaborated here. The water outlet of the water tank device 3 is connected to the water inlet pipe 41.

[0076] On the left and right inner side walls of the inner tank 12, there are guide rail brackets and fixing blocks for installing the guide rail brackets. The guide rail brackets are provided with card slots. The guide rail brackets are installed by moving the card slots onto the fixing blocks. The guide rail brackets include a plurality of horizontally arranged cross bars, a front vertical bar and a rear vertical bar arranged longitudinally, a front connecting bar and a rear connecting bar for connecting the fixing blocks. The plurality of cross bars are arranged between the front vertical bar and the rear vertical bar to form a track for supporting the tray grill. The front connecting bar is arranged close to the front vertical bar, and the rear connecting bar is arranged close to the rear vertical bar. The middle parts of the front connecting bar and the rear connecting bar are provided with card slots. The number of cross bars is an even number, and a track for the tray to slide in is formed between every two cross bars.

[0077] A self-cleaning method for the self-cleaning oven described above includes the following steps: Step 1: Adjust the temperature in the cavity 121 to 120 degrees Celsius through the heating tube system, and at the same time supply steam to the cavity 121 through the boiler device 4. The working duration is two hours and thirty minutes to three hours and thirty minutes. The above temperature and steam are used in combination to carbonize and clean the oil stains attached to the inside of the inner tank 12.

[0078] Alternatively, the temperature inside the cavity 121 is adjusted to 450 degrees Celsius through the heating pipe system, and the working duration is from two hours and thirty minutes to three hours and thirty minutes. The above-mentioned high temperature is used to carbonize and clean the oil stains attached to the inner liner 12;

[0079] Alternatively, the temperature inside the cavity 121 is adjusted to 450 degrees Celsius through the heating pipe system, and at the same time, steam is provided into the cavity (121) through the boiler device 4. The working duration is from two hours and thirty minutes to three hours and thirty minutes. The cooperation of the 450-degree Celsius high temperature and steam is used to carbonize and clean the oil stains attached to the inner liner 12;

[0080] Step 2: After the grease attached to the inner liner 12 is carbonized, the inner side wall of the inner liner 12 is wiped manually to further carry out the cleaning operation.

[0081] Embodiment 2:

[0082] The design scheme of this embodiment is basically the same as that of Embodiment 1, and the difference is:

[0083] The first abutting part 55 and the second abutting part 56 have the characteristic of elastic deformation, that is, they have elasticity. When the lighting lamp 5 is installed on the inner liner 12, both the first abutting part 55 and the second abutting part 56 undergo elastic deformation, so that the first abutting part 55 abuts on the edge of the lighting lamp mounting hole 122, and the second abutting part 56 abuts on the end face of the sealing part 52.

[0084] Embodiment 3:

[0085] The design scheme of this embodiment is basically the same as that of Embodiment 1 or Embodiment 2, and the difference is: the first abutting part 55, the connecting part 54 and the second abutting part 56 all have elasticity. When the lighting lamp 5 is installed on the inner liner 12, the first abutting part 55, the connecting part 54 and the second abutting part 56 all undergo elastic deformation, so that the first abutting part 55 abuts on the edge of the lighting lamp mounting hole 122, and the second abutting part 56 abuts on the end face of the sealing part 52.

[0086] Embodiment 4:

[0087] The design scheme of this embodiment is basically the same as that of Embodiment 1, and the difference is:

[0088] The air inlet pipe 45 is provided with a threaded part. The air inlet pipe fixing component includes a nut. The air inlet pipe fixing component is threadedly connected to the threaded part of the air inlet pipe 45, so that the air inlet pipe fixing component and the connecting piece 454 are respectively located on both sides of the side wall of the inner liner 12, that is, the connecting piece 454 presses the air inlet pipe seal 455 against one side edge of the air inlet pipe mounting hole 126, and the air inlet pipe fixing component presses against the other side edge of the air inlet pipe mounting hole 126.

[0089] Embodiment 5:

[0090] The design solution of this embodiment is basically the same as that of the first embodiment, and the differences are as follows:

[0091] The air pressure balance pipe 46 is provided with a threaded portion, and the top fixing assembly includes a nut. The top fixing assembly is threadedly connected to the threaded portion of the air pressure balance pipe 46, so that the top fixing assembly and the top fixing piece 47 are respectively located on both sides of the side wall of the inner tank 12, that is, the top fixing piece 47 presses the top seal 461 against one side edge of the top mounting hole 128, and the top fixing assembly presses against the other side edge of the top mounting hole 128.

[0092] The above shows and describes the basic principles, main features and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of this technical solution. Without departing from the spirit and scope of this technical solution, this technical solution will have various changes and improvements, and these changes and improvements all fall within the scope of this technical solution claimed. The scope of protection required by this technical solution is defined by the appended claims and their equivalents.

Claims

1. A self-cleaning oven, characterized in that: include: A box body, which at least comprises an inner container (12), wherein a cavity (121) for heating food is formed in the inner container (12); A steam system installed in the box body and used to provide steam into the inner pot (12) and heat the food; A lighting system installed in the box body and used to illuminate the interior of the inner container (12); A heat dissipation and exhaust system (6), which is installed in the box body and is used to dissipate heat and exhaust air from the inner container (12); and A control system, which is installed in the box and is used to control the operation of the steam system, the lighting system and the heat dissipation and exhaust system (6); The lighting system comprises a lighting lamp (5) and a lighting lamp sealing member (53), wherein the lighting lamp sealing member (53) is arranged between the lighting lamp (5) and an inner container (12), wherein the inner container (12) is provided with a lighting lamp mounting hole (122), wherein the lighting lamp (5) comprises a mounting portion (51) and a sealing portion (52), wherein the lighting lamp sealing member (53) is made of a high temperature resistant material, wherein the lighting lamp sealing member (53) comprises a first abutting portion (55), a connecting portion (54) and a second abutting portion (56), wherein the first abutting portion (55) is arranged at one end of the connecting portion (54), and the second abutting portion (56) is arranged at the other end of the connecting portion (54); When the lighting lamp (5) is installed in the lighting lamp installation hole (122) of the inner tank (12) through the installation portion (51), the abutment portion 1 (55) abuts against the edge of the lighting lamp installation hole (122), and the abutment portion 2 (56) abuts against the sealing portion (52), thereby sealing the gap between the lighting lamp (5) and the side wall of the lighting lamp installation hole (122).

2. A self-cleaning oven according to claim 1, characterized in that: The connecting portion (54) is elastic; Or / and, the abutment portion 1 (55) and the abutment portion 2 (56) are both elastic; When the lighting lamp (5) is installed in the inner tank (12), the lighting lamp sealing member (53) undergoes elastic deformation, so that the abutment portion 1 (55) abuts against the edge of the lighting lamp installation hole (122), and the abutment portion 2 (56) abuts against the end surface of the sealing portion (52).

3. A self-cleaning oven according to claim 1 or 2, characterized in that: The high temperature resistant material used to make the lighting lamp seal (53) is a metal material or a graphene material.

4. A self-cleaning oven according to claim 1 or 2, characterized in that: The lighting lamp seal (53) is in the shape of a hollow truncated cone, the connecting portion (54) forms the side wall of the hollow truncated cone, the abutting portion 1 (55) forms one end of the hollow truncated cone, and the abutting portion 2 (56) forms the other end of the hollow truncated cone; An end surface of the abutment portion (55) is parallel to and in contact with an edge of the lighting lamp mounting hole (122); The second end surface of the abutting portion (56) is parallel to and in contact with the end surface of the sealing portion (52).

5. A self-cleaning oven according to claim 1, characterized in that: The steam system comprises a boiler device (4), wherein the boiler device (4) comprises an air inlet pipe (45) leading to the interior of the inner tank (12) for providing steam; The inner liner (12) is provided with an air intake pipe mounting hole (126), the air intake pipe (45) is inserted into the air intake pipe mounting hole (126), and a connecting piece (454) is provided at the end of the air intake pipe (45), and an air intake pipe sealing member (455) is provided between the connecting piece (454) and the side wall of the inner liner (12), and the air intake pipe sealing member (455) is made of a metal material or a graphene material; the connecting piece (454) and the inner liner (12) are connected via an air intake pipe fixing assembly, so that the connecting piece (454) presses the air intake pipe sealing member (455) against the inner liner (12) located at the edge of the air intake pipe mounting hole (126), thereby sealing the gap between the air intake pipe (45) and the inner liner (12).

6. A self-cleaning oven according to claim 1 or 5, characterized in that: The steam system comprises a boiler device (4), the boiler device (4) comprising a main water outlet pipe (44) leading to the interior of the inner tank (12); a main water outlet pipe mounting hole (127) is provided on the inner tank (12), the main water outlet pipe (44) is mounted on the main water outlet pipe mounting hole (127), the main water outlet pipe (44) is provided with a limiting protrusion (441), a main water outlet pipe sealing member (442) is provided between the limiting protrusion (441) and one side of the inner tank (12), and the main water outlet pipe The sealing member (442) is made of a metal material or a graphene material. The main water outlet pipe (44) is connected to a main water outlet pipe fixing member (443). The main water outlet pipe fixing member (443) abuts against the other side of the inner liner (12). The main water outlet pipe fixing member (443) enables the limiting protrusion (441) to press the main water outlet pipe sealing member (442) against the inner liner (12) located at the edge of the main water outlet pipe installation hole (127), so as to seal the gap between the main water outlet pipe (44) and the inner liner (12).

7. A self-cleaning oven according to claim 5, characterized in that: The steam system comprises a boiler device (4), wherein the boiler device (4) comprises an air pressure balance pipe (46) leading to the interior of the inner tank (12); a top mounting hole (128) is provided on the inner tank (12), and the air pressure balance pipe (46) is installed in the top mounting hole (128); the air pressure balance pipe (46) is provided with a top fixing plate (47), and a top sealing member (461) is provided between the top fixing plate (47) and the side wall of the inner tank (12), wherein the top sealing member (461) is made of a metal material or a graphene material, and the top fixing plate (47) is connected to the side wall of the inner tank (12) through a top fixing assembly, so that the top fixing plate (47) presses the top sealing member (461) against the inner tank (12) located at the edge of the top mounting hole (128), thereby sealing the gap between the air pressure balance pipe (46) and the inner tank (12).

8. A self-cleaning oven according to claim 1 or 7, characterized in that: Also includes: A heating pipe system, which is installed in the box and connected to the control system, and is used to heat the food in the cavity (121); The heating tube system comprises: a top heating tube (21) located above the cavity (121); the rear end of the top heating tube (21) extends out from the cavity (121) and is connected to a control system; a top fixing plate (47) is provided in the cavity (121); a top sealing member (461) is provided between the top fixing plate (47) and the inner wall of the cavity (121); the top sealing member (461) is made of a metal material or a graphene material; the inner liner (12) is connected to the top fixing plate (47) through a top fixing assembly, so that the top fixing plate (47) presses the top sealing member (461) against the inner liner (12) located at the edge of the top mounting hole (128), thereby sealing the gap between the top heating tube (21) and the inner liner (12).

9. A self-cleaning oven according to claim 1, characterized in that: include: The heat dissipation exhaust system (6) comprises: an exhaust pipe (64), the exhaust pipe (64) is provided with an exhaust hole 1 (641) and a fixing part (642), the exhaust hole 1 (641) is used to discharge steam, the inner container (12) is provided with an exhaust hole 2 (123) and an exhaust pipe mounting hole (129), and the edge of the exhaust hole 2 (123) extends toward the outside of the inner container (12) to form a guide part (124), the exhaust pipe (64) is mounted on the guide part (124) through the exhaust hole 1 (641), and The end of the exhaust chimney fixing member (643) passes through the exhaust chimney mounting hole (129) and is connected to the fixing portion (642), thereby realizing the installation of the exhaust chimney (64) onto the inner liner (12), and an exhaust chimney seal (644) is arranged between the exhaust chimney fixing member (643) and the edge of the exhaust chimney mounting hole (129), and the exhaust chimney seal (644) is made of metal material or graphene material, and is used to seal the gap between the exhaust chimney fixing member (643) and the exhaust chimney mounting hole (129).

10. A self-cleaning method, used in the self-cleaning oven according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: adjusting the temperature in the cavity (121) to 120 degrees Celsius through the heating tube system, and simultaneously providing steam into the cavity (121) through the boiler device (4); Alternatively, the temperature in the cavity (121) is adjusted to 450 degrees Celsius by a heating tube system; Alternatively, the temperature in the cavity (121) is adjusted to 450 degrees Celsius through the heating tube system, and steam is provided to the cavity (121) through the boiler device (4); Step 2: After the grease attached to the inner container (12) is carbonized, the inner wall of the inner container (12) is manually wiped.

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