Door seal, cooking device and method for improving sealing performance of door seal

Abstract

The invention relates to a door seal, a cooking device and a method for improving the sealing performance of the door seal, the cooking device comprises a box assembly, a door assembly and the door seal located between the door assembly and the box assembly, the door seal comprises a mounting ring and an inflation ring, and the mounting ring is mounted to the box assembly to surround an inner container opening of the box assembly; the inflation ring is fixedly connected to the mounting ring and used for abutting against the door assembly, and the inflation ring is provided with an annular inflation interlayer and an inflation inlet communicated with the annular inflation interlayer; when the annular inflation interlayer is inflated through the inflation inlet, the inflation ring expands and is used for being attached to the door assembly to seal an inner container opening of the box body assembly, in this way, after the door seal is inflated and expanded, the surface, attached to one side of the door assembly, of the door seal becomes tall and straight again, and therefore the door seal is tightly attached to the door assembly and not prone to air leakage; a user does not need to dismount the door seal, and the problem that the sealing performance is secondarily damaged in the dismounting process is also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of door seals, and in particular to a door seal, a cooking device and a method for improving the sealing performance of the door seal. Background Art

[0002] The door seal is generally made of silicone. In the cooking device, the door seal is set between the door assembly and the inner tank assembly. The door assembly compresses the silicone door seal toward the inner tank assembly to form a seal, ensuring that the steam and condensed water in the inner tank do not overflow. The following problems exist in the prior art: 1. At present, whether the sealing of the door seal is good can only be achieved by whether the steam leaks. When the cooking device with poor sealing is actually used, condensed water will overflow from the poor sealing, which may easily lead to the risk of electric shock in severe cases; 2. The silicone door seal is prone to fatigue collapse when used for a long time at high temperature, resulting in poor sealing at the door seal, which may easily induce the risks mentioned in the first point. Replacing the door seal is time-consuming and labor-intensive, and the sealing cannot be guaranteed during the replacement of the door seal; 3. When the door assembly is closed, if the pressure in the inner tank suddenly increases or external force is applied to the door assembly, the sealing of the door seal will be instantly destroyed, causing steam to overflow, posing a risk of scalding the user. Summary of the invention

[0003] In view of the shortcomings of existing silicone door seals, such as difficulty in timely detection of sealing performance and inability to ensure sealing performance in actual use, it is necessary to provide a door seal, a cooking device and a method for improving the sealing performance of the door seal.

[0004] Door seal, used to seal the box assembly and door assembly, including:

[0005] A mounting ring, used to be mounted to the box assembly to surround the inner tank opening of the box assembly; and

[0006] An inflatable ring is fixedly connected to the mounting ring and is used to abut the door assembly. The inflatable ring has an annular inflatable interlayer and an inflatable port connected to the annular inflatable interlayer. When the annular inflatable interlayer is inflated through the inflatable port, the inflatable ring expands to fit with the door assembly to close the inner liner opening of the box assembly.

[0007] With such arrangement, after the door seal is inflated, the surface attached to one side of the door assembly becomes upright again, so that it fits tightly with the door assembly and is not prone to air leakage. In addition, the annular inflatable interlayer can be inflated repeatedly without the user having to disassemble the door seal, which also avoids the problem of secondary damage to the sealing during the disassembly process.

[0008] In one of the embodiments, the inflation ring is further provided with an adsorption groove recessed toward the mounting ring and an air extraction channel connected to the adsorption groove.

[0009] With such an arrangement, under the suction action of the vacuum pump, negative pressure is gradually formed in the sealing chamber, which increases the connection strength between the door seal and the door assembly, and helps to reduce the risk of decreased sealing between the door seal and the door assembly due to a sudden increase in pulling force.

[0010] In one embodiment, the inflatable ring includes a connecting ring body fixedly connected to the mounting ring and an inner ring body and an outer ring body fixedly connected to the connecting ring body, and the inner ring body and the outer ring body are arranged at intervals on the same side of the connecting ring body to enclose the adsorption groove.

[0011] With such arrangement, the adsorption groove formed surrounds the inner tank opening, and the adsorption force generated during vacuuming also covers the inner tank opening, thereby improving the sealing between the door seal and the door assembly and preventing steam leakage.

[0012] In one embodiment, the outer ring body and the inner ring body gradually extend from the bottom of the adsorption groove to the groove opening.

[0013] With such arrangement, when vacuuming, the outer ring body and the inner ring body are pressed against the door assembly under the action of the negative pressure in the adsorption tank, and both sides of the outer ring body and the inner ring body facing each other can fit tightly with the door assembly, which is beneficial to improving the air tightness of the door seal.

[0014] In one embodiment, the annular inflatable interlayer includes a first inflatable segment located in the inner ring body, and the annular inflatable interlayer includes a second inflatable segment located in the outer ring body.

[0015] With such a configuration, the annular inflatable interlayer is arranged around the adsorption groove, which can maintain the shapes of the outer ring body and the inner ring body when inflated, thereby increasing the rigidity of the outer ring body and the inner ring body and raising the upper limit of the door seal adsorption force. Therefore, the door assembly can be firmly adsorbed to the door seal, and will not shift from the door seal even if the door assembly is hit by external force, thereby reducing steam leakage.

[0016] In one of the embodiments, the annular inflatable interlayer further includes a third inflatable segment located in the connecting ring body.

[0017] With such arrangement, the connecting ring body can be deformed and expanded, and when air is evacuated, the connecting ring body can be more easily attached to the door assembly, thereby increasing the adsorption force between the door seal and the door assembly.

[0018] In one embodiment, the first inflatable segment and the second inflatable segment are respectively connected to the third inflatable segment, and the inflation port is located in the connecting ring body and is connected to the third inflatable segment.

[0019] With such a configuration, the first and second inflatable segments can be inflated synchronously when the third inflatable segment is inflated through the inflation port, so that the outer ring body and the inner ring body remain upright toward the side of the door assembly to increase the sealing of the door assembly when it is attached to the door seal. Since the deformation at the connecting ring body is smaller, setting the inflation port at the connecting ring body can increase the airtightness at the inflation port.

[0020] In one of the embodiments, the door seal further includes an exhaust extension tube that passes through the connecting ring body and provides the exhaust channel.

[0021] With such a configuration, since the connecting ring body has less deformation than the outer ring body and the inner ring body, the air tightness of the air extraction channel can be increased. The configuration of the air extraction extension tube not only facilitates the connection between the door seal and the air extraction pump, but also reduces the impact of the vibration of the air extraction pump on the air tightness of the door seal.

[0022] The present application also provides a cooking device, comprising:

[0023] Box components;

[0024] Door assembly;

[0025] As described above, the door seal has a mounting ring mounted on the box assembly, the door seal has an adsorption groove located on a side of the inflation ring facing the door assembly and an air extraction channel connected to the adsorption groove, and the door assembly cover is disposed on the adsorption groove and abuts against the inflation ring to enclose a sealed cavity;

[0026] an air pump connected to the air inlet and used to inflate the door seal; and

[0027] An air pump is connected to the air pumping channel and is used to pump air from the sealed cavity.

[0028] With this arrangement, the door assembly and the door seal can be firmly adsorbed by extracting the gas in the sealing cavity. When the door seal has poor sealing or fatigue collapse, it is only necessary to inject gas into the door seal to make the door seal surface upright, thereby improving the sealing performance of the door seal.

[0029] The present application also provides a method for improving the sealing performance of a door seal, which is applicable to the above-mentioned cooking device and comprises the following steps:

[0030] S1. Turn on the vacuum pump to evacuate the sealed chamber;

[0031] S2, detecting the working current of the vacuum pump; and

[0032] S3, determine whether the working current is greater than the preset current value, if so, stop the vacuum pump to evacuate the sealing chamber, if not, turn on the inflation pump to inflate the door seal and return to step S2.

[0033] With such arrangement, the door seal of the cooking device is self-checked and adaptively adjusted by this method, thereby ensuring the sealing performance of the door seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a cooking device in an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A cross-sectional structural diagram of the cooking device shown at the door seal;

[0036] Figure 3 for Figure 2 Schematic diagram of the structure of the middle door seal;

[0037] Figure 4 for Figure 3 A schematic diagram of the structure of the door seal facing the side of the box assembly;

[0038] Figure 5 for Figure 4 The door seal is shown in a cross-sectional view along the AA direction;

[0039] Figure 6 for Figure 4 The door seal is shown in a cross-sectional view along the BB direction;

[0040] Figure 7 A flow chart of the method for improving the sealing performance of a door seal provided in this application.

[0041] Reference numerals:

[0042] 100. Door seal; 101. Annular inflatable interlayer; 1011. First inflatable section; 1012. Second inflatable section; 1013. Third inflatable section; 102. Inflating port; 103. Adsorption slot; 104. Exhaust channel; 10. Mounting ring; 11. Mounting portion; 12. Connecting portion; 20. Inflatable ring; 21. Connecting ring body; 22. Inner ring body; 23. Outer ring body; 30. Inflatable extension tube; 40. Exhaust extension tube; 50. Abutment ring; 200. Box assembly; 201. Box shell; 202. Inner liner; 300. Door assembly; 400. Sealed cavity. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0049] The door seal is generally made of silicone. In the cooking device, the door seal is set between the door assembly and the inner tank assembly. The door assembly compresses the silicone door seal toward the inner tank assembly to form a seal, ensuring that the steam and condensed water in the inner tank do not overflow. The following problems exist in the prior art: 1. At present, whether the sealing of the door seal is good can only be achieved by whether the steam leaks. When the cooking device with poor sealing is actually used, condensed water will overflow from the poor sealing, which may easily lead to the risk of electric shock in severe cases; 2. The silicone door seal is prone to fatigue collapse when used for a long time at high temperature, resulting in poor sealing at the door seal, which may easily induce the risks mentioned in the first point. Replacing the door seal is time-consuming and labor-intensive, and the sealing cannot be guaranteed during the replacement of the door seal; 3. When the door assembly is closed, if the pressure in the inner tank suddenly increases or external force is applied to the door assembly, the sealing of the door seal will be instantly destroyed, causing steam to overflow, posing a risk of scalding the user.

[0050] Based on this, it is necessary to provide a door seal, a cooking device and a method for improving the sealing performance of a door seal that are convenient for detecting the sealing performance of a silicone door seal and improving the sealing performance of the door seal.

[0051] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of a cooking device in an embodiment of the present invention. Figure 2 for Figure 1 The cross-sectional structural diagram of the cooking device shown at the door seal, Figure 3 for Figure 2Structural schematic diagram of the middle door seal 100. The cooking device provided in the present application includes a box assembly 200, a door assembly 300 and a door seal 100 located between the door assembly 300 and the box assembly 200, the door seal 100 includes a mounting ring 10, an inflation ring 20 and an abutment ring 50, specifically, the box assembly 200 includes an inner liner 202 and a box shell 201 covering the inner liner 202, the box shell 201 is also provided with a snap-in groove, the mounting ring 10 is snap-into the snap-in groove, the mounting ring 10 has anti-slip grooves to increase the firmness of the snap-in, specifically, the mounting ring 10 includes a mounting portion 11 providing anti-slip grooves and a connecting portion 12 integrally connected to the mounting portion 11 and the inflation ring 20, the connecting portion 12 abuts against the box shell 201, the abutment ring 50 abuts against the inner wall of the inner liner 202 to increase the sealing of the connection between the door seal 100 and the box assembly 200, and the inflation ring 20 abuts against the door assembly 300. In order to solve the problem of reduced sealing of the cooking device due to aging of the existing silicone door seal, the inflatable ring 20 has an annular inflatable interlayer 101 and an inflation port 102 connected to the annular inflatable interlayer 101. When the annular inflatable interlayer 101 is inflated through the inflation port 102, the inflatable ring 20 expands to fit with the door assembly 300 to close the inner liner 202 opening of the box assembly 200. The cooking device also includes an inflation pump connected to the inflation port 102. In this way, after the door seal 100 is inflated, the surface attached to one side of the door assembly 300 becomes upright again, so that it fits tightly with the door assembly 300 and is not easy to leak. In addition, the annular inflatable interlayer 101 can be repeatedly inflated without the user having to disassemble the door seal 100, which also avoids the problem of secondary damage to the sealing during the disassembly process.

[0052] Please refer again Figure 2 and Figure 3 Furthermore, in order to solve the problem of the sudden increase of the pressure in the inner pot and the door assembly being touched by external force, which leads to the decrease of the sealing performance of the door seal, in one embodiment provided in the present application, the inflatable ring 20 is also provided with an adsorption groove 103 which is recessed toward the mounting ring 10 and an exhaust channel 104 which is connected to the adsorption groove 103. The door assembly 300 is covered on the adsorption groove 103 to form a sealed cavity 400. The cooking device also includes an exhaust pump which is connected to the exhaust channel 104. Under the exhaust action of the exhaust pump, a negative pressure is gradually formed in the sealed cavity 400, which increases the connection strength between the door seal 100 and the door assembly 300, and helps to reduce the risk of the decrease of the sealing performance between the door seal 100 and the door assembly 300 due to the sudden increase of the pulling force. It can be understood that when opening the door, it is only necessary to turn off the exhaust pump to allow the outside air to enter the sealed cavity 400, which will not affect the normal opening of the door by the user.

[0053] For details, please refer to Figure 3The inflatable ring 20 includes a connecting ring body 21 and an inner ring body 22 and an outer ring body 23 fixedly connected to the connecting ring body 21. The inner ring body 22 and the outer ring body 23 are arranged at intervals on the same side of the connecting ring body 21 to enclose the adsorption groove 103. The adsorption groove 103 formed in this way surrounds the opening of the inner tank 202. The adsorption force coverage range generated during air extraction also surrounds the opening of the inner tank 202, thereby improving the sealing between the door seal 100 and the door assembly 300 and preventing steam leakage. Optionally, in an embodiment provided in the present application, the outer ring body 23 and the inner ring body 22 extend gradually from the bottom of the adsorption groove 103 to the opening of the groove. When air is extracted, the outer ring body 23 and the inner ring body 22 are pressed to the door assembly 300 under the negative pressure in the adsorption groove 103. The two sides of the outer ring body 23 and the inner ring body 22 facing each other can fit tightly with the door assembly 300, which is beneficial to improving the airtightness at the door seal 100. Preferably, the outer ring body 23 and the inner ring body 22 are respectively and integrally connected to the connecting ring body 21 .

[0054] See also Figure 4 and Figure 5 , Figure 4 for Figure 3 The structure diagram of the door seal 100 facing the side of the box assembly 200 is shown in FIG. Figure 5 for Figure 4The cross-sectional view of the door seal 100 taken along the AA direction is shown. Optionally, in an embodiment provided in the present application, the annular inflatable interlayer 101 includes a first inflatable section 1011 located at the inner ring body 22 and a second inflatable section 1012 located at the outer ring body 23, so that the annular inflatable interlayer 101 is arranged around the adsorption groove 103, and can maintain the shapes of the outer ring body 23 and the inner ring body 22 when inflated, and also increase the rigidity of the outer ring body 23 and the inner ring body 22, thereby increasing the upper limit of the adsorption force of the door seal 100 on the door assembly, so that the door assembly 300 can be firmly adsorbed on the door seal 100, and even if the door assembly 300 is hit by external force, it will not be dislocated from the door seal 100, thereby reducing steam leakage. Preferably, in an embodiment provided in the present application, the annular inflatable interlayer 101 also includes a third inflatable section 1013 located at the connecting ring body 21, so that the connecting ring body 21 can be deformed and expanded. When air is evacuated, the connecting ring body 21 can be more easily attached to the door assembly 300, thereby increasing the adsorption force between the door seal 100 and the door assembly 300. Preferably, in an embodiment provided in the present application, the first inflatable segment 1011 and the second inflatable segment 1012 are respectively connected to the third inflatable segment 1013, and the inflation port 102 is located at the connecting ring body 21 and is connected to the third inflatable segment 1013. When the third inflatable segment 1013 is inflated through the inflation port 102, the first inflatable segment 1011 and the second inflatable segment 1012 can be inflated synchronously, so that the outer ring body 23 and the inner ring body 22 remain upright toward one side of the door assembly 300 to increase the sealing of the door assembly 300 when it is attached to the door seal 100. Since the deformation at the connecting ring body 21 is small, setting the inflation port 102 at the connecting ring body 21 can increase the airtightness at the inflation port 102.

[0055] See also Figure 4 and Figure 6 , Figure 6 for Figure 4 The cross-sectional view of the door seal 100 in the BB direction is shown. Optionally, in one embodiment provided in the present application, the door seal 100 also includes an air extraction extension tube 40 that passes through the connecting ring body 21 and provides an air extraction channel 104. It can be understood that the air extraction port is also located at the connecting ring body 21. Since the deformation of the connecting ring body 21 is smaller than that of the outer ring body 23 and the inner ring body 22, the air tightness of the air extraction channel 104 can be increased. The provision of the air extraction extension tube 40 not only facilitates the connection of the door seal 100 with the air extraction pump, but also reduces the impact of the vibration of the air extraction pump on the air tightness of the door seal 100. Similarly, the door seal 100 also includes an air inflation extension tube 30 provided at the inflation port 102, and the air inflation pump is connected to the air inflation extension tube 30.

[0056] Optionally, in an embodiment provided in the present application, a first valve is provided between the inflation pump and the inflation extension tube 30, and a second valve is provided between the exhaust pump and the exhaust extension tube 40. Closing the first valve can maintain the air tightness of the annular inflation interlayer 101, so that the inflation pump does not need to work continuously, and the same applies to the second valve.

[0057] This application also provides a method for improving the sealing performance of the door seal, please refer to Figure 7 , including the following steps:

[0058] S1, turn on the vacuum pump to evacuate the sealed chamber 400;

[0059] S2, detecting the working current of the vacuum pump; and

[0060] S3, determine whether the working current is greater than the preset current value, if so, stop the vacuum pump to evacuate the sealing chamber 400, if not, turn on the inflation pump to inflate the door seal 100 and return to step S2.

[0061] In this way, before the steaming function of the cooking device is turned on, the door seal of the cooking device is self-checked and adaptively adjusted by this method, thereby ensuring the sealing of the door seal. It is understandable that after cooking, when the door needs to be opened, it is only necessary to turn off the vacuum pump to connect the sealed cavity 400 with the outside, thereby canceling the negative pressure state of the sealed cavity 400. When a second valve is provided between the vacuum pump and the vacuum extension tube 40, it is only necessary to open the second valve.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A door seal, used to seal a box assembly (200) and a door assembly (300), characterized in that: include: A mounting ring (10) for mounting on the box assembly (200) to surround the opening of the inner tank (202) of the box assembly (200); and An inflatable ring (20) is fixedly connected to the mounting ring (10) and is used to abut the door assembly (300). The inflatable ring (20) has an annular inflatable interlayer (101) and an inflatable port (102) connected to the annular inflatable interlayer (101). When the annular inflatable interlayer (101) is inflated via the inflatable port (102), the inflatable ring (20) expands to fit with the door assembly (300) to close the opening of the inner liner (202) of the box assembly (200).

2. The door seal according to claim 1, characterized in that: The inflation ring (20) is also provided with an adsorption groove (103) recessed toward the mounting ring (10) and an air extraction channel (104) connected to the adsorption groove (103).

3. The door seal according to claim 2, characterized in that: The inflation ring (20) comprises a connecting ring body (21) fixedly connected to the mounting ring (10), and an inner ring body (22) and an outer ring body (23) fixedly connected to the connecting ring body (21); the inner ring body (22) and the outer ring body (23) are arranged at intervals on the same side of the connecting ring body (21) to enclose the adsorption groove (103).

4. The door seal according to claim 3, characterized in that: The outer ring body (23) and the inner ring body (22) gradually extend from the bottom of the adsorption groove (103) to the groove opening.

5. The door seal according to any one of claims 3 or 4, characterized in that: The annular inflatable interlayer (101) comprises a first inflatable section (1011) located in the inner ring body (22); and / or The annular inflatable interlayer (101) comprises a second inflatable section (1012) located on the outer ring body (23).

6. The door seal according to claim 5, characterized in that: The annular inflatable interlayer (101) further comprises a third inflatable section (1013) located at the connecting ring body (21).

7. The door seal according to claim 6, characterized in that: The first inflatable segment (1011) and the second inflatable segment (1012) are respectively connected to the third inflatable segment (1013), and the inflatable port (102) is located on the connecting ring body (21) and is connected to the third inflatable segment (1013).

8. The door seal according to claim 3, characterized in that: The door seal also includes an air extraction extension tube (40) that passes through the connecting ring body (21) and provides the air extraction channel (104).

9. A cooking device, characterized in that include: Box assembly (200); Door assembly (300); The door seal according to any one of claims 1 to 8, wherein the mounting ring (10) of the door seal is mounted on the box assembly (200), the door seal has an adsorption groove (103) located on a side of the inflation ring (20) facing the door assembly (300) and an air extraction channel (104) connected to the adsorption groove (103), and the door assembly (300) is covered on the adsorption groove (103) and abuts against the inflation ring (20) to enclose a sealed cavity (400); an air pump connected to the air inlet (102) and used to inflate the door seal; and An air pump is connected to the air extraction channel (104) and is used to extract air from the sealed cavity (400).

10. A method for improving the sealing performance of a door seal, applicable to the cooking device according to claim 9, characterized in that: The steps include: S1, turning on the vacuum pump to evacuate the sealed chamber (400); S2, detecting the working current of the vacuum pump; and S3, determining whether the working current is greater than a preset current value, if so, stopping the vacuum pump to evacuate the sealed chamber (400), if not, turning on the inflation pump to inflate the door seal and returning to step S2.

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