Air-cooled pressure cooker

Abstract

The air-cooled pressure cooker comprises an inner container and a heat preservation cover located on the outer side of the inner container, a cooling cavity is formed between the side wall of the inner container and the side wall of the heat preservation cover, an annular air channel which extends in the circumferential direction of the inner container and is enlarged in the radial size is formed in the cooling cavity, and the heat preservation cover is provided with an air passing opening opposite to the annular air channel in position. The pressure cooker further comprises an air cooling unit for exhausting and / or supplying air to the cooling cavity through the air passing opening so as to cool the inner container. According to the air-cooled pressure cooker, the probability that airflow collides with the inner container and escapes into multiple strands of airflow, the multiple strands of airflow collide with one another to bear the kinetic energy loss phenomenon is reduced, the kinetic energy loss of the airflow in the movement process is reduced, the airflow can smoothly move in the annular air channel, the heat dissipation efficiency of the air-cooled unit can be improved, and the service life of the air-cooled pressure cooker is prolonged. The probability of whistling caused by rapid collision between the airflow and the inner pot or the heat preservation cover in the high-pressure state is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and in particular relates to an air-cooled pressure cooker. Background Art

[0002] Pressure cookers are gradually becoming an indispensable cooking appliance in modern fast-paced life due to their pressure cooking function. However, after the pressure cooker is finished cooking, the user cannot open the lid immediately because the pressure inside the pot is higher than the atmospheric pressure. Therefore, the pressure inside the pot needs to be reduced to a level close to or equal to the atmospheric pressure before the lid can be opened. Traditional pressure cookers usually have an exhaust valve on the top of the lid. When cooking is finished, the exhaust valve is opened to exhaust and release the pressure of the pressure cooker. However, for soups, liquids or viscous foods, using this method to release pressure will cause the overheated liquid and food in the pot to form a "boiling" phenomenon. The liquid will vaporize rapidly due to the pressure change and produce a large number of bubbles. The bubbles formed by the viscous liquid are not easy to break. The bubbles bring the food out of the pot, and the food overflows around, contaminating the pot body, increasing the cleaning burden of the user.

[0003] To solve this problem, some pressure cookers are equipped with air cooling units. When cooking is completed, the air cooling unit is used to cool the inner pot of the pressure cooker. However, due to the space limitation of the pressure cooker, the gap between the inner pot and the external insulation cover is usually small. The heat dissipation wind resistance of the air cooling unit is large during air cooling, and there is a problem of uneven heat dissipation, resulting in low heat dissipation efficiency of the pressure cooker. Users still need to wait a long time before opening the lid, resulting in a poor user experience. Utility Model Content

[0004] The present application provides an air-cooled pressure cooker to solve the technical problems of low heat dissipation efficiency and uneven heat dissipation of traditional air-cooled pressure cookers.

[0005] The technical solution adopted in this application is:

[0006] A wind-cooled pressure cooker comprises an inner liner and a heat-insulating cover located outside the inner liner, a cooling cavity is formed between the side wall of the inner liner and the side wall of the heat-insulating cover, an annular air duct extending along the circumference of the inner liner and increasing in radial dimension is formed in the cooling cavity, the heat-insulating cover is provided with an air outlet opposite to the position of the annular air duct, and the pressure cooker further comprises an air-cooling unit for exhausting and / or supplying air to the cooling cavity through the air outlet to air-cool the inner liner.

[0007] The air-cooled pressure cooker described in this application also includes the following additional technical features:

[0008] The inner liner is recessed inwardly and / or the heat-insulating cover is protruded outwardly, so as to form the annular air duct in the cooling cavity.

[0009] The pressure cooker further comprises a wind shielding member located below the inner container, so as to separate the space between the inner container and the heat-insulating cover into the cooling cavity and a flow-through cavity located below the cooling cavity.

[0010] The wind shield is provided with a flow port communicating with the cooling cavity and the flow port, and the flow port and the air port are located on both sides of the inner tank.

[0011] The pressure cooker further comprises a heating plate located below the inner pot, and the inner periphery of the wind shield abuts against the outer periphery of the heating plate.

[0012] The inner periphery of the wind shield is provided with a concave platform matched with the outer periphery of the heating plate.

[0013] The inner liner and / or the heat-insulating cover are provided with a flow-blocking portion located below the annular air duct and protruding toward the cooling cavity.

[0014] The lower part of the inner liner is provided with an inwardly recessed portion, and the recessed portion cooperates with the side wall of the heat-insulating cover to form the annular air duct, and the distance H1 between the bottom end of the recessed portion and the bottom wall of the inner liner satisfies: H1≥15mm.

[0015] In the annular air duct, a radial distance L between the outer wall of the inner liner and the inner wall of the heat preservation cover satisfies: 5mm≤L≤30mm.

[0016] The height H2 of the annular air duct is not less than the diameter of the air outlet.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] 1. The air-cooled pressure cooker of the present application is provided with an annular air duct, and an air outlet is arranged at a position opposite to the position of the annular air duct. The air cooling unit supplies air into the cooling chamber through the air outlet and / or draws air from the cooling chamber through the air outlet to realize the circulation of cold air in the cooling chamber and achieve rapid cooling of the inner pot. Compared with the gap between the existing side wall of the inner liner and the side wall of the thermal insulation cover, the radial size of the annular air duct in the present application is greatly increased. On the one hand, a larger turning space is reserved for the airflow provided by the air-cooling unit when it moves between the air outlet and the annular air duct, making the contact between the airflow and the inner liner softer, reducing the probability of collision and impact between the airflow and the inner liner, thereby reducing the probability of kinetic energy loss caused by the airflow hitting the inner liner and escaping into multiple airflows, and multiple airflows colliding with each other, reducing the kinetic energy loss of the airflow during movement, allowing the airflow to move more smoothly in the annular air duct, which helps to improve the heat dissipation efficiency of the air-cooling unit; moreover, when the gap between the side wall of the inner liner and the side wall of the thermal insulation cover is small, the airflow hits the inner liner or the thermal insulation cover, and part of the airflow turns back and collides with the airflow in the extraction direction or the inlet direction, which not only causes the exhaust or air intake to be blocked, reducing the air cooling efficiency, but also causes the airflow turbulence at the air outlet, resulting in noise escalation. The probability is greatly reduced, thereby reducing the impact of airflow, which is conducive to the smooth exhaust or air supply, and helps to reduce noise and improve user experience; on the other hand, since the annular air duct is arranged to extend along the circumference of the inner pot, the airflow moves along the annular air duct under the guidance of the annular air duct, and can absorb heat uniformly for the inner pot during the movement along the annular air duct, reducing the possibility of uneven heat dissipation of the inner pot caused by the inability of the airflow to fully contact the inner pot in the prior art, and providing a guarantee for the uniform heat dissipation of the inner pot; in addition, due to the volume and space configuration of the pressure cooker, the distance between the insulation cover and the inner pot is usually close, resulting in a narrow volume of the cooling chamber. The airflow can easily collide and rub with the outer wall of the inner pot or the inner wall of the insulation cover in a relatively small space, causing a whistling sound, affecting the user's auditory experience. The present application alleviates the pressure of the airflow in the annular air duct by setting an annular air duct with an increased radial size, thereby reducing the probability of a whistling sound caused by the rapid collision of the airflow with the inner pot or the insulation cover under high pressure, and improving the user's experience.

[0019] 2. As a preferred embodiment of the present application, a wind shield is provided to separate the space between the inner liner and the heat preservation cover into a cooling chamber and a flow chamber, thereby reducing the probability of the airflow in the cooling chamber escaping prematurely during movement, ensuring that the airflow can fully contact the inner liner in the annular air duct, providing a guarantee for the cooling efficiency of the airflow unit, and further reducing the user's waiting time.

[0020] 3. As a preferred embodiment of the present application, by setting a flow port, a discharge channel or an introduction channel is provided for the hot air flow after absorbing heat in the cooling chamber, so that the air flow after absorbing heat can be discharged from the cooling chamber through the flow port in time, or the cold air outside the pressure cooker is sucked into the cooling chamber through the flow port to cool the inner tank, thereby improving the flow efficiency of the gas between the cooling chamber and the flow port, and the flow port and the air outlet are respectively arranged on two opposite sides of the inner tank, so that the air flow can fully contact with the inner tank to the greatest extent when moving between the flow port and the air outlet, so that the air flow can fully absorb the heat of the inner tank, further improving the heat dissipation speed of the inner tank, and reducing the waiting time of the user.

[0021] 4. As a preferred embodiment of the present application, a baffle protruding into the cooling chamber is provided so that the gap between the inner liner and the thermal insulation cover at the baffle is reduced compared to that at the annular air duct, thereby increasing the difficulty of the airflow in the annular air duct to escape to the gap at the baffle, so as to ensure the residual amount of airflow in the annular air duct, facilitate sufficient contact between the airflow and the inner liner, and improve the heat dissipation efficiency of the inner liner.

[0022] 5. As a preferred embodiment of the present application, the lower part of the inner liner is provided with an inwardly recessed portion, and the recessed portion cooperates with the side wall of the heat preservation cover to form the annular air duct, and the distance H1 between the bottom end of the recessed portion and the bottom wall of the inner liner satisfies: H1 ≥ 15 mm. Since the quantity and volume of ingredients cooked in the pressure cooker are different each time, and the heat is gradually transferred from the bottom to the top during the cooking process, the annular air duct can be aligned with the lower part of the inner pot, so that the airflow can play an effective role and can come into contact with the relatively high temperature part to quickly absorb the heat of the inner pot, further improving the cooling rate, thereby improving the pressure reduction rate; and the distance H1 between the bottom end of the recessed portion and the bottom wall of the inner pot is greater than or equal to 15mm. On the one hand, it can ensure the distance between the bottom end of the annular air duct and the connection between the bottom wall and the side wall of the inner pot, avoiding the risk of deformation and cracking at the connection between the bottom wall and the side wall of the inner pot due to the inward recess of the inner pot, which helps to reduce the difficulty of processing and manufacturing the inner pot and improve the yield rate. On the other hand, it also ensures the distance between the bottom end of the annular air duct and the bottom wall of the inner pot, avoiding the distance between the two being too small, forming a narrow gap inside the inner pot that is difficult to clean, and reducing the cleaning pressure of the user.

[0023] 6. As a preferred embodiment of the present application, in the annular air duct, the radial distance L between the outer wall of the inner pot and the inner wall of the heat preservation cover satisfies: 5mm≤L≤30mm. On the one hand, since the airflow provided by the air cooling unit will experience a change in the direction of movement when entering and exiting the annular air duct and flowing in the annular air duct, by making L greater than or equal to 5mm, the airflow can have more sufficient turning distance to make a slow and smooth turn, and the flow of the airflow is smoother, further reducing the probability of the airflow colliding with the side wall of the inner pot or the air cooling unit before being deflected in time, thereby further reducing the kinetic energy loss of the airflow during the turning process, and providing a guarantee for improving the heat dissipation speed of the inner pot; on the other hand, by making L less than or equal to 30mm, the pressure cooker will not occupy too much space due to the setting of the annular air duct, thereby increasing the volume of the pressure cooker or reducing the cooking space of the inner pot; at the same time, L less than or equal to 30mm can also reduce the processing difficulty of the inner pot or the heat preservation cover, avoiding deformation and cracking caused by excessive concave inner pot or convex outer heat preservation cover, thereby improving the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A cross-sectional view of an air-cooled pressure cooker according to an embodiment of the present application;

[0026] Figure 2 for Figure 1 A magnified view of part A;

[0027] Figure 3 An exploded view of a partial structure of an air-cooled pressure cooker according to an embodiment of the present application.

[0028] Figure 4 This is a structural schematic diagram of a partial structure of an air-cooled pressure cooker in one embodiment of the present application;

[0029] Figure 5 This is a cross-sectional view of a partial structure of an air-cooled pressure cooker according to an embodiment of the present application.

[0030] List of reference numerals:

[0031] 1 inner liner, 11 recessed portion;

[0032] 2 thermal insulation cover, 21 air outlet;

[0033] 3 Cooling chamber;

[0034] 4. Annular air duct;

[0035] 5 air cooling unit;

[0036] 6 wind shield, 61 flow outlet, 62 concave platform;

[0037] 7. Flow cavity;

[0038] 8 heating plates;

[0039] 9. Flow-blocking portion. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0042] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In this application, 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, an electrical connection, or a communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0045] like Figure 1 As shown, an air-cooled pressure cooker comprises an inner liner 1 and a heat preservation cover 2 located outside the inner liner 1, a cooling chamber 3 is formed between the side wall of the inner liner 1 and the side wall of the heat preservation cover 2, an annular air duct 4 extending along the circumference of the inner liner 1 and having an increased radial dimension is formed in the cooling chamber 3, the heat preservation cover 2 is provided with an air outlet 21 opposite to the position of the annular air duct 4, and the pressure cooker further comprises an air cooling unit 5 for extracting and / or supplying air to the cooling chamber 3 through the air outlet 21 to air-cool the inner liner 1. The "increased radial dimension" means that the radial dimension between the inner liner side wall and the heat preservation cover side wall at the position of the annular air duct is greater than the radial dimension between the inner liner side wall and the heat preservation cover side wall at other positions of the cooling chamber.

[0046] It should be noted that the present application does not specifically limit the shape of the annular air duct 4, which may be a rectangle, or some other shapes such as a waist drum shape, and those skilled in the art may select according to actual conditions.

[0047] In a preferred embodiment, similar to Figure 1 , along the radial direction of the annular air duct 4, the cross section of one side of the two opposite sides is arc-shaped, and the cross section of the other side is straight. Taking the air supply from the air cooling unit 5 to the annular air duct 4 as an example, the cross section of one side of the annular air duct 4 is set to be arc-shaped. After the airflow enters the annular air duct 4, it will slowly change its direction of movement under the guidance of the arc-shaped cross section. On the one hand, it reduces the kinetic energy loss caused by the collision between the airflow and the outer wall of the inner liner 1, so that the airflow can maintain a high level of movement in the annular air duct 4, providing a guarantee for the heat dissipation rate of the air cooling unit 5; on the other hand, it avoids the whistling caused by the violent collision between the airflow and the inner liner 1, and improves the user experience; furthermore, the setting of the arc-shaped cross section of the annular air duct 2 can also increase the contact area between the cold air and the inner liner 1, thereby improving the cooling efficiency. In addition, the arc-shaped cross section makes the wind flow more smoothly at the adjacent part of the annular air duct 4 when it flows out of the annular channel 4, reducing the occurrence of turbulence.

[0048] The air-cooled pressure cooker of the present application is provided with an annular air duct 4, and an air outlet 21 is provided at a position opposite to the position of the annular air duct 4. The air-cooling unit 5 supplies air into the cooling chamber 3 through the air outlet 21 or extracts air from the cooling chamber 3 through the air outlet 21, so as to realize the circulation of cold air in the cooling chamber 3 and realize the rapid cooling of the inner liner 1. Compared with the gap between the existing side wall of the inner liner 1 and the side wall of the heat preservation cover 2, the radial dimension of the annular air duct 4 in the present application is greatly increased. On the one hand, a larger turning space is reserved for the airflow provided by the air-cooling unit 5 when it moves between the air outlet 21 and the annular air duct 4, so that the contact between the airflow and the inner liner 1 is softer, and the probability of collision and impact between the airflow and the inner liner 1 is reduced, thereby reducing the probability of kinetic energy loss caused by the airflow colliding with the inner liner 1 and dissipating into multiple directions, and the collision between multiple airflows, and reducing the airflow in The kinetic energy loss during the movement enables the airflow to move more smoothly in the annular air duct 4, which helps to improve the heat dissipation efficiency of the air cooling unit 5; moreover, when the gap between the side wall of the inner tank 1 and the side wall of the thermal insulation cover 2 is small, the airflow hits the inner tank 1 or the thermal insulation cover 2, and part of the airflow is turned back and collides with the airflow in the extraction direction or the inlet direction, which not only causes the air extraction or air intake to be blocked, thereby reducing the air cooling efficiency, but also causes the airflow turbulence at the air outlet 21, resulting in an increase in noise. The diameter of the annular air duct in the present application increases in 4 directions, and the airflow is turned back after hitting the inner tank 1 or the thermal insulation cover 2. The probability of backflow is greatly reduced, thereby reducing the impact of airflow, which is conducive to the smooth extraction or supply of air, and helps to reduce noise and improve user experience; on the other hand, since the annular air duct 4 is arranged to extend along the circumference of the inner liner 1, the airflow moves along the annular air duct 4 under the guidance of the annular air duct 4, and can evenly absorb heat for the inner liner 1 during the movement along the annular air duct 4, reducing the possibility of uneven heat dissipation of the inner liner 1 caused by the inability of the airflow to fully contact the inner liner 1 in the prior art, and providing a guarantee for the uniform heat dissipation of the inner liner 1 In addition, due to the volume and space configuration of the pressure cooker, the distance between the heat preservation cover 2 and the inner pot 1 is usually close, resulting in a narrow volume of the cooling chamber 3. The airflow can easily collide and rub against the outer wall of the inner pot or the inner wall of the heat preservation cover 2 in a relatively small space, causing a whistling sound, which affects the user's auditory experience. The present application relieves the pressure of the airflow in the annular air duct 4 by providing an annular air duct 4 with an increased radial dimension, thereby reducing the probability of a whistling sound caused by a rapid collision of the airflow with the inner pot or the heat preservation cover 2 under high pressure, thereby improving the user's experience.

[0049] The present application does not limit the air supply form of the air cooling unit 5. In one embodiment, the air cooling unit 5 is an axial flow fan that supplies air toward the annular air duct 4. In another embodiment, the air cooling unit 5 is an exhaust fan that drives the air flow in the annular air duct 4 by exhausting air. Of course, both an air supply fan and an exhaust fan may be provided.

[0050] As a preferred embodiment of the present application, the inner liner 1 is recessed inwardly and / or the heat-insulating cover 2 is protruded outwardly to form the annular air duct 4 in the cooling chamber 3. That is, the inner liner 1 may be recessed inwardly to increase the radial dimension of the annular air duct 4, the heat-insulating cover 2 may be protruded outwardly to increase the radial dimension of the annular air duct 4, or the inner liner may be recessed inwardly and the heat-insulating cover may be protruded outwardly to increase the radial dimension of the annular air duct 4, which is not limited here.

[0051] Preferably, the annular air duct 4 is formed by the inward depression of the inner pot and the side wall of the heat preservation cover, so that the inner pot located in the depressed part can be closer to the food, and the air flow in the annular air duct 4 can better take away the heat in the pot, thereby improving the heat dissipation efficiency of the pressure cooker.

[0052] As a preferred embodiment of the present application, Figure 1 , Figure 2 As shown, the pressure cooker further includes a windshield 6 located below the inner liner 1 to separate the space between the inner liner 1 and the heat preservation cover 2 into the cooling chamber 3 and the flow chamber 7 located below the cooling chamber 3. By providing the windshield 6 to separate the space between the inner liner 1 and the heat preservation cover 2 into the cooling chamber 3 and the flow chamber 7, the probability of the airflow in the cooling chamber 3 escaping too early during the movement is reduced, ensuring that the airflow can fully contact the inner liner in the annular air duct, providing a guarantee for the cooling efficiency of the airflow unit, and further reducing the waiting time of the user.

[0053] This embodiment does not limit the air intake or exhaust method of the annular air duct 4. Taking the air cooling unit 5 supplying air to the annular air duct 4 as an example, the exhaust method of the airflow after absorbing heat can be any of the following embodiments:

[0054] Embodiment 1: Figure 2 , Figure 3 , Figure 4 As shown, the wind shield 6 is provided with a flow port 61 connecting the cooling chamber 3 and the flow chamber 7, and the flow port 61 and the air port 21 are located on both sides of the inner liner 1. By providing the flow port 61, a discharge channel or an introduction channel is provided for the hot air flow after absorbing heat in the cooling chamber 3, so that the hot air flow after absorbing heat can be discharged from the cooling chamber through the flow port in time, or the cold air outside the pressure cooker is sucked into the cooling chamber 3 through the flow port 61 to cool the inner liner 1, thereby improving the flow efficiency of the gas between the cooling chamber and the flow chamber, thereby improving the heat dissipation efficiency of the inner liner 1, and the flow port 61 and the air port 21 are respectively arranged to be located on two opposite sides of the inner liner 1, so that the air flow can fully contact with the inner liner 1 to the greatest extent when moving between the flow port 61 and the air port 21, so that the air flow can fully absorb the heat of the inner liner 1, further improving the heat dissipation speed of the inner liner, and reducing the waiting time of the user.

[0055] The present embodiment does not limit the forming method of the flow opening 61. In one example, the flow opening 61 is a hole formed on the wind shield 6. In another example, Figure 3 As shown, a partial area of ​​the wind shield 6 is broken to form a gap, and the gap serves as a flow opening 61 .

[0056] Embodiment 2: Figure 1 As shown, the pressure cooker further includes a heating plate 8 located below the inner pot 1, and the inner periphery of the wind shield 6 abuts against the outer periphery of the heating plate 8. The inner periphery of the wind shield 6 abuts against the outer periphery of the heating plate 8, which improves the sealing property of the annular air duct 4 to a certain extent and reduces the escape of the airflow in the annular air duct 4.

[0057] In the second embodiment, the wind overflow path may adopt any one of the following examples:

[0058] Example 1: There is a gap between the outer periphery of the wind shield 6 and the inner wall of the heat-insulating cover 2, and the airflow is sent out of the cooling cavity 3 through the gap.

[0059] Example 2: The outer periphery of the windshield 6 abuts against the inner wall of the heat preservation cover 2, and the windshield 6 is provided with a flow port 61 connecting the cooling chamber 3 and the flow chamber 7, and the wind in the cooling chamber 3 flows out of the cooling chamber 3 from the flow port 61;

[0060] Example 3: The outer periphery of the wind shield 6 abuts against the inner wall of the heat preservation cover 2, and a temperature measuring hole is provided in the central area of ​​the heating disk 8, and the wind in the cooling cavity 3 flows out of the cooling cavity 3 from the temperature measuring hole.

[0061] The second embodiment does not limit the fixing method of the wind shield 6, and it can adopt any one of the following examples:

[0062] Example 1: Figure 2 and Figure 3 As shown, the inner periphery of the windshield 6 is provided with a concave platform 62 adapted to the outer periphery of the heating plate 8. The windshield 6 is fixed to the heating plate 8 by interference fit between the inner periphery and the convex platform of the windshield 6 and the outer periphery of the heating plate 8, which helps to simplify the structural design of the windshield 6 and the heating plate 8, and eliminates the need for a separate connection structure for connecting the windshield 6 and the heating plate 8.

[0063] Example 2: It also includes a mounting frame arranged at the bottom of the heat preservation cover 2, and the wind shielding member 6 is installed on the top of the mounting frame.

[0064] Example 3: A stop ridge is provided on the inner wall of the heat-insulating cover 2 and / or the outer periphery of the wind shield 6, and the wind shield 6 is mounted on the inner wall of the heat-insulating cover 2 via the stop ridge.

[0065] Embodiment 3: The pressure cooker further comprises a heating plate 8 located below the inner pot 1, a heat dissipation gap exists between the inner periphery of the wind shield 6 and the outer periphery of the heating plate 8, and the airflow in the annular air duct 4 is discharged through the heat dissipation gap.

[0066] Optionally, the wind shield 6 is made of heat-insulating and heat-resistant material to prevent the wind shield 6 from absorbing the heat of the heating plate 8 and transferring it to the thermal insulation cover 2, resulting in reduced heating effect of the pressure cooker and excessive temperature outside the pressure cooker.

[0067] It should be noted that the present application does not limit the heating method of the inner pot, and the inner pot 1 can also be heated by an electromagnetic heating coil or other heating methods, and is not limited to the heating coil 8. When an electromagnetic heating coil is used, the wind shield 6 can be arranged on the outside of the coil frame of the electromagnetic heating coil.

[0068] The above embodiments all provide a way to realize that the air flows out of the pressure cooker from the flow cavity 7 below the inner pot 1, but the present application is not limited thereto. In another embodiment, the air flow can flow out of the pressure cooker from the gap between the top of the heat preservation cover 2 and the outer flange of the top of the inner pot 1, and the gap between the pot cover and the pot body.

[0069] The present application does not limit the airflow escape prevention method of the annular air duct 4, and it can adopt any one of the following implementations:

[0070] Implementation method 1: Figure 1 , Figure 2 As shown, the inner tank 1 is provided with a flow blocking portion 9 located below the annular air duct 4 and protruding toward the cooling cavity 3 .

[0071] Embodiment 2: The heat-insulating cover 2 is provided with a flow-blocking portion 9 located below the annular air duct 4 and protruding toward the cooling cavity 3 .

[0072] Embodiment 3: The inner liner 1 and the heat-insulating cover 2 are both provided with a flow-blocking portion 9 located below the annular air duct 4 and protruding toward the cooling cavity 3 .

[0073] By providing a baffle 9 protruding into the cooling chamber 3, the gap between the inner liner 1 and the thermal insulation cover 2 at the baffle 9 is reduced compared to the annular air duct 4, thereby increasing the difficulty of the airflow in the annular air duct 4 to escape to the gap at the baffle 9, so as to ensure the residual amount of airflow in the annular air duct 4, facilitate sufficient contact between the airflow and the inner liner, and improve the heat dissipation efficiency of the inner liner 1.

[0074] As a preferred embodiment of the present application, Figure 1 and Figure 5As shown, the lower part of the inner liner 1 is provided with an inwardly recessed recess 11, and the recess 11 cooperates with the side wall of the heat preservation cover 2 to form the annular air duct 4, and the distance H1 between the bottom end of the recess 11 and the bottom wall of the inner liner 1 satisfies: H1≥15mm. Since the quantity and volume of ingredients cooked by the pressure cooker are different each time and the heat is gradually transferred from the bottom to the top during the cooking process, the annular air duct 4 is aligned with the lower part of the inner pot 1, so that the airflow can play an effective role and can come into contact with the relatively high temperature part to quickly absorb the heat of the inner pot 1, further improving the cooling rate, thereby improving the pressure reduction rate; and the distance H1 between the bottom end of the recessed portion 11 and the bottom wall of the inner pot 1 is greater than or equal to 15 mm. On the one hand, it can ensure the distance between the bottom end of the annular air duct 4 and the connection between the bottom wall and the side wall of the inner pot, avoiding the risk of deformation and cracking at the connection between the bottom wall and the side wall of the inner pot due to the inward recess of the inner pot, which helps to reduce the difficulty of processing and manufacturing the inner pot 1 and improve the yield rate. On the other hand, it also ensures the distance between the bottom end of the annular air duct 4 and the bottom wall of the inner pot, avoiding the distance between the two being too small, forming a narrow gap inside the inner pot that is difficult to clean, and reducing the cleaning pressure of the user.

[0075] As a preferred implementation of the present application, Figure 5 As shown, in the annular air duct 4, the radial distance L between the outer wall of the inner liner 1 and the inner wall of the heat preservation cover 2 satisfies: 5mm≤L≤30mm. On the one hand, since the airflow provided by the air-cooling unit 5 will experience a change in direction of movement when entering and exiting the annular air duct 4 and flowing in the annular air duct 4, by making L greater than or equal to 5mm, the airflow can have more sufficient turning distance to make a slow and smooth turn, making the airflow flow smoother, further reducing the probability of the airflow colliding with the side wall of the inner pot 1 or the air-cooling unit 5 without timely deflection, thereby further reducing the kinetic energy loss of the airflow during the turning process, providing a guarantee for improving the heat dissipation speed of the inner pot 1, and further reducing the possibility of whistling caused by airflow collision, which helps to improve the user experience; on the other hand, by making L less than or equal to 30mm, the pressure cooker will not take up too much space due to the provision of the annular air duct, thereby increasing the volume of the pressure cooker or reducing the cooking space of the inner pot; at the same time, L less than or equal to 30mm can also reduce the processing difficulty of the inner pot or the insulation cover, avoid deformation and cracking caused by excessive concave inner pot or convex outer insulation cover, and improve the yield rate.

[0076] In addition, such an arrangement can also ensure a certain distance between the air cooling unit and the heat source of the inner tank, thereby reducing the operating temperature of the air cooling unit and increasing the service life of the air cooling unit.

[0077] As a preferred implementation of the present application, Figure 5As shown, the height H2 of the annular air duct 4 is not less than the diameter of the air port 21. Taking the air supply of the air cooling unit 5 into the annular air duct 4 as an example, since the height H2 of the annular air duct 4 is not less than the diameter of the air port 21, the air flow can all enter the annular air duct 4 without escaping to the outside of the annular air duct 4 at the first time, which helps to maximize the cooling efficiency of the air cooling unit 5.

[0078] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0079] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0080] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An air-cooled pressure cooker, comprising an inner liner and a heat-insulating cover located outside the inner liner, wherein a cooling chamber is formed between the side wall of the inner liner and the side wall of the heat-insulating cover, wherein: An annular air duct extending along the circumference of the inner liner and increasing in radial dimension is formed in the cooling chamber, the heat-insulating cover is provided with an air outlet opposite to the annular air duct, and the pressure cooker also includes an air cooling unit for exhausting and / or supplying air to the cooling chamber through the air outlet to cool the inner liner.

2. The air-cooled pressure cooker according to claim 1, characterized in that: The inner liner is recessed inwardly and / or the heat-insulating cover is protruded outwardly, so as to form the annular air duct in the cooling cavity.

3. The air-cooled pressure cooker according to claim 1, characterized in that: The pressure cooker further comprises a wind shielding member located below the inner container, so as to separate the space between the inner container and the heat-insulating cover into the cooling cavity and a flow-through cavity located below the cooling cavity.

4. The air-cooled pressure cooker according to claim 3, characterized in that: The wind shield is provided with a flow port communicating with the cooling cavity and the flow port, and the flow port and the air port are located on both sides of the inner tank.

5. The air-cooled pressure cooker according to claim 3, characterized in that: The pressure cooker further comprises a heating plate located below the inner pot, and the inner periphery of the wind shield abuts against the outer periphery of the heating plate.

6. The air-cooled pressure cooker according to claim 5, characterized in that: The inner periphery of the wind shield is provided with a concave platform matched with the outer periphery of the heating plate.

7. The air-cooled pressure cooker according to claim 1, characterized in that: The inner liner and / or the heat-insulating cover are provided with a flow-blocking portion located below the annular air duct and protruding toward the cooling cavity.

8. The air-cooled pressure cooker according to claim 1, characterized in that: The lower part of the inner liner is provided with an inwardly recessed portion, and the recessed portion cooperates with the side wall of the heat-insulating cover to form the annular air duct, and the distance H1 between the bottom end of the recessed portion and the bottom wall of the inner liner satisfies: H1≥15mm.

9. The air-cooled pressure cooker according to claim 1, characterized in that: In the annular air duct, a radial distance L between the outer wall of the inner liner and the inner wall of the heat preservation cover satisfies: 5mm≤L≤30mm.

10. The air-cooled pressure cooker according to claim 1, characterized in that: The height H2 of the annular air duct is not less than the diameter of the air outlet.

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