CN211093364U

CN211093364U - Pressure cooker, cooker lid structure and radiator

Info

Publication number: CN211093364U
Application number: CN201921666267.9U
Authority: CN
Inventors: 于博; 赵万东; 张鹏娥; 刘怀灿; 王训; 段智伟
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-07-28
Anticipated expiration: 2029-10-08

Abstract

The utility model relates to a pressure cooker, pot cover structure and radiator. The pot cover structure comprises a radiator, a pot cover body and a fan, wherein the radiator comprises a base and a plurality of radiating fins, and the plurality of radiating fins are arranged on the base at intervals. The radiator is arranged in the pot cover body, and the fan is arranged in the mounting hole formed by the surrounding of the fin roots of the radiating fins. During the pressure release, start the fan work, because the fan is rotating the in-process air-out, and then make the air-out direction of fan rotate the air-out towards the rotation direction. Because radiating fin's wing tail sets up towards the rotation direction skew of fan for the wing root, and then makes radiating fin unanimous or close by the extending direction of wing root to wing tail with the air-out direction, effectively avoids or reduces radiating fin to the resistance of air-out, and then can promote the amount of wind among the radiating process, promotes the radiating effect of radiator, promotes the pressure release speed of the pot body.

Description

Pressure cooker, cooker lid structure and radiator

Technical Field

The utility model relates to a pressure cooker technical field especially relates to a pressure cooker, pot cover structure and radiator.

Background

At present, a pressure cooker is one of indispensable cooking appliances in a kitchen, can cook food by utilizing high air pressure, and has the characteristics of high cooking speed, time saving and energy saving. After the traditional pressure cooker is cooked, the pressure in the pressure cooker is too high, so that the cover cannot be opened in time, and great inconvenience is brought to users. At present, a pressure cooker can take away heat in the cooker by arranging a radiator on a cooker cover or a cooker body, so that the pressure in the cooker is reduced. However, the conventional radiator has poor heat dissipation effect on the cooker cover or the cooker body, so that the pressure relief speed of the pressure cooker cannot be effectively increased.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a pressure cooker, a cooker lid structure and a heat sink, which can effectively increase the heat dissipation speed and further increase the pressure release speed.

A heat sink, comprising:

a base;

the radiating fins are arranged on the base at intervals and provided with fin roots and fin tails oppositely arranged with the fin roots, the fin roots of the radiating fins surround a mounting hole for mounting a fan, and the fin tails are arranged in a manner of offsetting relative to the fin roots towards the rotation direction of the fan.

When the radiator is used, the plurality of radiating fins are arranged on the base at intervals to form the radiator, and the base can provide support for the installation of the radiating fins. The radiator is arranged in the cooker cover body and absorbs heat in the cooking cavity through the cooker cover body. The fan is arranged in the mounting hole surrounded by the fin roots of the radiating fins. After the food in the cooking cavity is cooked, the fan is started to work, so that the air generated by the fan passes through the radiating fins, and the heat on the radiating fins is taken away. Because the fan that sets up at the mounting hole is rotating the in-process air-out, and then makes the air-out direction of fan rotate the air-out towards the direction of rotation. Because radiating fin's wing tail sets up towards the rotation direction skew of fan for the wing root, and then makes radiating fin unanimous or close by the extending direction of wing root to wing tail with the air-out direction, effectively avoids or reduces radiating fin to the resistance of air-out, and then can promote the amount of wind among the radiating process, promotes the radiating effect of radiator, promotes the pressure release speed of the pot body.

The technical solution is further explained below:

in one embodiment, the heat dissipation fins are recessed towards one side of the rotation direction of the fan.

In one embodiment, the fin root forms a hole wall of the mounting hole, and an included angle between a side wall of the heat dissipation fin facing the rotation direction of the fan and a tangent line of the hole wall of the mounting hole is 10-90 degrees.

In one embodiment, a connecting line of the fin root and the axis of the mounting hole forms a first connecting line, a connecting line of the fin tail and the axis of the mounting hole forms a second connecting line, and an included angle between the second connecting line and the first connecting line is 0-60 degrees.

A pot cover structure comprising:

a pot cover body;

the radiator is arranged in the pot cover body; and

and the fan is arranged in the mounting hole, and wind generated by the fan can pass through the radiating fins.

When the pot cover structure is used, the plurality of radiating fins are arranged on the base at intervals to form the radiator, and the base can support the radiating fins. The radiator is arranged in the cooker cover body, the cooker cover body covers the cooking cavity of the cooker body, and the radiator absorbs heat in the cooking cavity through the cooker cover body. The fan is arranged in the mounting hole surrounded by the fin roots of the radiating fins. After the food in the cooking cavity is cooked, the fan is started to work, so that the air generated by the fan passes through the radiating fins, and the heat on the radiating fins is taken away. Because the fan that sets up at the mounting hole is rotating the in-process air-out, and then makes the air-out direction of fan rotate the air-out towards the direction of rotation. Because radiating fin's wing tail sets up towards the rotation direction skew of fan for the wing root, and then makes radiating fin unanimous or close by the extending direction of wing root to wing tail with the air-out direction, effectively avoids or reduces radiating fin to the resistance of air-out, and then can promote the amount of wind among the radiating process, promotes the radiating effect of radiator, and then promotes the speed that cooks intracavity temperature reduction, promotes the pressure release speed of the pot body.

In one embodiment, the pot cover body is provided with an accommodating cavity, the pot cover body is further provided with a first heat dissipation opening and a second heat dissipation opening arranged at an interval with the first heat dissipation opening, and the second heat dissipation opening and the first heat dissipation opening are both communicated with the accommodating cavity; the radiator is arranged in the accommodating cavity, the first radiating port is communicated with the mounting hole, and the second radiating port is communicated with the gap between the radiating fins.

In one embodiment, the first heat dissipation opening is formed in a side wall of the pot cover body.

In one embodiment, the air guide device further comprises an air guide member, the air guide member is arranged in the accommodating cavity, the air guide member divides the accommodating cavity into an installation cavity and an air guide cavity, an air opening is formed in the air guide member, the installation cavity is communicated with the air guide cavity through the air opening, the radiator is arranged in the installation cavity, the fan is correspondingly arranged at the air opening, the first heat dissipation opening is communicated with the air guide cavity, and the second heat dissipation opening is communicated with the installation cavity.

In one embodiment, a heat dissipation piece is arranged in the air guide cavity.

In one embodiment, the second heat dissipation opening is an annular opening along the side wall of the pot cover body; or

The second heat dissipation openings are at least two, and the at least two second heat dissipation openings are formed in the side wall of the pot cover body and are arranged at intervals along the rotation direction of the fan.

In one embodiment, if the number of the second heat dissipation openings is at least two, the second heat dissipation openings and the first heat dissipation openings are arranged in a staggered manner.

In one embodiment, the heat sink further includes a heat conduction member, one side of the accommodating cavity is open, the heat sink is disposed on the heat conduction member, and the heat conduction member covers the open side of the accommodating cavity.

In one embodiment, the fan is a centrifugal fan.

A pressure cooker comprising:

a pot body formed with a cooking cavity; and

according to the pot cover structure, the pot cover body can be covered on the cooking cavity.

When the pressure cooker is used, the plurality of radiating fins are arranged on the base at intervals to form the radiator, and the base can support the radiating fins. The radiator is arranged in the cooker cover body, the cooker cover body covers the cooking cavity of the cooker body, and the radiator absorbs heat in the cooking cavity through the cooker cover body. The fan is arranged in the mounting hole surrounded by the fin roots of the radiating fins. After the food in the cooking cavity is cooked, the fan is started to work, so that the air generated by the fan passes through the radiating fins, and the heat on the radiating fins is taken away. Because the fan that sets up at the mounting hole is rotating the in-process air-out, and then makes the air-out direction of fan rotate the air-out towards the direction of rotation. Because radiating fin's wing tail sets up towards the rotation direction skew of fan for the wing root, and then makes radiating fin unanimous or close by the extending direction of wing root to wing tail with the air-out direction, effectively avoids or reduces radiating fin to the resistance of air-out, and then can promote the amount of wind among the radiating process, promotes the radiating effect of radiator, and then promotes the speed that cooks intracavity temperature reduction, promotes the pressure release speed of the pot body.

Drawings

FIG. 1 is a schematic structural diagram of a pressure cooker in one embodiment;

FIG. 2 is a cross-sectional view of the pressure cooker shown in FIG. 1;

FIG. 3 is an exploded view of the pressure cooker shown in FIG. 1;

FIG. 4 is a schematic structural diagram of the radiator and the fan shown in FIG. 3;

fig. 5 is a top view of the heat sink of fig. 4.

Description of reference numerals:

10. pressure cooker, 10, cooker lid structure, 100, cooker lid body, 110, holding chamber, 112, installation chamber, 114, wind-guiding chamber, 120, first thermovent, 130, second thermovent, 200, radiator, 210, base, 220, radiating fin, 222, wing root, 224, wing tail, 230, mounting hole, 300, fan, 400, motor, 500, wind-guiding piece, 600, heat-conducting piece, 510, wind gap, 20, the pot body, 201, culinary art chamber, 30, inner pot, 40, heater.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many different forms other than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention, and it is therefore not to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

Referring to fig. 1 to 3, in an embodiment of the pressure cooker 1, a pressure releasing speed can be at least effectively increased, so as to facilitate a user. Specifically, the pressure cooker 1 includes a lid structure 10 and a cooker body 20, the cooker body 20 is formed with a cooking cavity 201, the lid structure 10 includes a lid body 100, a heat sink 200 and a fan 300, the heat sink 200 is disposed in the lid body 100, the fan 300 is disposed in the heat sink 200, and wind generated by the fan 300 passes through the heat sink 200. The lid body 100 can be covered on the cooking cavity 201.

After the pressure cooker 1 finishes cooking, in the pressure relief process, because the heat radiator 200 is arranged in the cooker lid body 100, the cooker lid body 100 can be covered on the cooking cavity 201, so that the heat radiator 200 is positioned on the upper part of the cooker body 20. The heat sink 200 is enabled to effectively absorb the heat of the cooking cavity 201 through the lid body 100 by using the thermal buoyancy. The fan 300 is started, so that the wind generated by the fan 300 passes through the radiator 200, and further takes away the heat on the radiator 200, and the temperature in the cooking cavity 201 is reduced. In the cooling process, because the change of temperature makes culinary art chamber 201 internal pressure change, the liquid food in the culinary art chamber 201 can take place the boiling repeatedly, greatly strengthens the heat transfer effect for the cooling is rapider, thereby realizes pressure cooker 1's quick pressure release.

In one embodiment, the lid structure 10 further includes a motor 400, and the motor 400 is used for driving the fan 300. Specifically, motor 400 is disposed on heat sink 200, thereby facilitating motor 400 to effectively drive fan 300 to operate.

Referring to fig. 4 and 5, in an embodiment, the heat sink 200 includes a base 210 and a plurality of heat dissipation fins 220, wherein the heat dissipation fins 220 are disposed on the base 210 at intervals. The heat dissipating fins 220 have a fin root 222 and a fin tail 224 opposite to the fin root 222, the fin roots 222 of the heat dissipating fins 220 enclose a mounting hole 230, the fan 300 is mounted in the mounting hole 230, and the fin tail 224 is offset relative to the fin root 222 toward a rotation direction a of the fan 300. The base 210 can provide support for the installation of the heat dissipating fins 220.

Because the fan 300 arranged in the mounting hole 230 is rotated to output air, the air output direction of the fan 300 is rotated to output air towards the rotating direction a. Because the fin tail 224 of the heat dissipation fin 220 is arranged in a manner of offsetting relative to the fin root 222 towards the rotation direction a of the fan 300, the extension direction of the heat dissipation fin 220 from the fin root 222 to the fin tail 224 is consistent or close to the air outlet direction, the resistance of the heat dissipation fin 220 to the air outlet is effectively avoided or reduced, the air quantity in the heat dissipation process can be increased, the heat dissipation effect of the heat sink 200 is improved, the temperature reduction speed in the cooking cavity 201 is increased, and the pressure relief speed of the pot body 20 is increased.

In this embodiment, the fan 300 is a centrifugal fan 300, and the wind generated by the fan 300 is blown out after passing through the heat dissipation fins 220, so that the wind speed is higher and the heat dissipation efficiency is higher. In other embodiments, the fan 300 may also intake air through the heat dissipation fins 220, so that the heat dissipation effect of the heat dissipation fins 220 is more uniform.

In other embodiments, the fan 300 may also be an axial flow fan 300, which is to achieve the purpose that the wind generated by the fan 300 passes through the heat dissipation fins 220 and further takes away the heat on the heat sink 200.

In one embodiment, the heat dissipation fins 220 are recessed toward one side of the rotation direction a of the fan 300. The fin root 222 of the heat spreader 200 transitions smoothly to the fin tail 224. The heat dissipation fins 220 are arranged in the concave manner, so that the resistance of the heat dissipation fins 220 to the air outlet of the fan 300 can be further reduced, and the heat dissipation effect of the heat sink 200 can be further improved.

Optionally, the fin root 222 forms a hole wall of the mounting hole 230, and an included angle α between a side wall of the heat dissipation fin 220 facing the rotation direction a of the fan 300 and a tangent line of the hole wall of the mounting hole 230 is 10 ° to 90 °, so as to effectively ensure that the air outlet of the fan 300 passes through a gap between two adjacent heat dissipation fins 220, and reduce the influence of the heat dissipation fins 220 on the air outlet circulation.

In one embodiment, a line connecting the wing root 222 and the axis of the mounting hole 230 forms a first line, a line connecting the wing tail 224 and the axis of the mounting hole 230 forms a second line, and an included angle between the second line and the first line is β 0-60 degrees.

In one embodiment, the height of the heat dissipation fins 220 is between 5mm and 1200mm, so as to prevent the heat dissipation effect from being affected by the too small height of the heat dissipation fins 220. Of course, the heat dissipating fins 220 may also be provided according to the size of the pot lid body 100. Specifically, the thickness of the heat dissipation fins 220 is less than or equal to 2mm, so that the influence of the excessive thickness of the heat dissipation fins 220 on the heat dissipation effect is avoided.

In this embodiment, the outer diameter of the heat sink 200 may be set according to the size of the pot lid body 100. Specifically, the heat sink 200 has an outer diameter of between 50mm and 300 mm.

In one embodiment, the base 210 is a plate-shaped structure, and the plurality of heat dissipation fins 220 are disposed on a surface of the plate-shaped structure. By arranging the base 210 as a plate-shaped structure, the occupation of the installation space of the heat sink 200 in the pot cover body 100 can be effectively saved. Specifically, the thickness of the base 210 is 5mm or less.

In other embodiments, the heat sink 200 in any of the above embodiments may also be applied to other components requiring heat dissipation.

Referring to fig. 2 and fig. 3 again, in an embodiment, the pot cover body 100 is formed with an accommodating cavity 110, the pot cover body 100 is further formed with a first heat dissipating opening 120 and a second heat dissipating opening 130 spaced apart from the first heat dissipating opening 120, and the second heat dissipating opening 130 and the first heat dissipating opening 120 are both communicated with the accommodating cavity 110; the heat sink 200 is disposed in the accommodating cavity 110, the first heat dissipation opening 120 is communicated with the mounting hole 230, and the second heat dissipation opening 130 is communicated with the gap between the heat dissipation fins 220. The heat sink 200 is mounted in the receiving cavity 110, so that the heat sink 200 can be effectively protected.

In this embodiment, the first heat dissipation opening 120 is an air inlet, and the second heat dissipation opening 130 is an air outlet. Because fan 300 sets up in mounting hole 230, after starting fan 300, fan 300 can be by first thermovent 120 air inlet, through the clearance between radiating fin 220, by the air-out of second thermovent 130, and then takes away the heat on radiating fin 220, conveniently realizes the flow of radiating fin 220 surrounding air current.

In other embodiments, the first heat dissipation opening 120 may also be an air outlet, and the second heat dissipation opening 130 may also be an air inlet, as long as the heat on the heat dissipation fins 220 is taken away by the air passing through the heat dissipation fins 220.

In one embodiment, the first heat dissipation opening 120 is formed on a sidewall of the lid body 100. Set up on the lateral wall through seting up first thermovent 120, can guarantee the clean and tidy of pot cover body 100 structure on the one hand, on the other hand can avoid setting up the roof at pot cover body 100, and then prevents that the foreign matter from directly falling into in first thermovent 120.

Specifically, the pot cover structure 10 further includes an air guide member 500, and the air guide member 500 is disposed in the accommodating cavity 110 and divides the accommodating cavity 110 into an installation cavity 112 and an air guide cavity 114. An air opening 510 is formed in the air guide 500, and the mounting cavity 112 is communicated with the air guide cavity 114 through the air opening 510. The heat sink 200 is disposed in the mounting cavity 112, and the fan 300 is correspondingly disposed at the air opening 510. The first heat dissipating opening 120 is communicated with the air guiding cavity 114, and the second heat dissipating opening 130 is communicated with the mounting cavity 112.

The air guide member 500 is arranged to form the air guide cavity 114, so that the first heat dissipation opening 120 is conveniently arranged on the side wall of the pot cover, meanwhile, the first heat dissipation opening 120 is conveniently communicated with the mounting hole 230 through the air guide cavity 114, and air is further conveniently fed into the fan 300 through the first heat dissipation opening 120. The air guide member 500 separates the air inlet flow from the air outlet flow of the fan 300, so that the air inlet flow is located in the air guide cavity 114, and the air outlet flow is located in the installation cavity 112, thereby effectively avoiding collision between the air inlet flow and the air outlet flow.

In this embodiment, the diameter of the tuyere 510 is smaller than or equal to the diameter of the mounting hole 230, thereby further avoiding the collision between the inlet airflow and the outlet airflow.

Optionally, a heat sink may be disposed within the air-guiding cavity 114. The heat dissipation of other components in the pot cover body 100 can be facilitated by disposing the heat dissipation member in the air guiding cavity 114. In this embodiment, no heat sink may be disposed in the air guiding cavity 114.

Of course, in other embodiments, the first heat dissipation opening 120 may also be opened on the top wall of the pot lid body 100. In the present embodiment, when the first heat dissipation opening 120 is the air inlet 510, the air inlet resistance is reduced. In other embodiments, when the first heat dissipation opening 120 is the air outlet 510, the air outlet resistance is reduced.

In this embodiment, the number of the second heat dissipating openings 130 is at least two, and the at least two second heat dissipating openings 130 are spaced apart from each other and disposed on the sidewall of the lid body 100. The quantity of wind passing through the radiator 200 can be effectively increased by arranging the at least two second heat dissipation openings 130, and further the heat dissipation efficiency is improved.

Specifically, at least two second heat dissipation ports 130 are spaced apart in the rotation direction a of the fan 300, thereby enabling the wind passing through the heat dissipation fins 220 to be effectively blown out. Further, there are two second heat dissipation openings 130. In other embodiments, the number of the second heat dissipation openings 130 may also be one, three, or other numbers.

Optionally, the first heat dissipation opening 120 and the second heat dissipation opening 130 are both disposed on the side wall of the pot cover body 100, and the first heat dissipation opening 120 and the second heat dissipation opening 130 are disposed in a staggered manner, so that it can be avoided that hot air blown out from the second heat dissipation opening 130 enters the first heat dissipation opening 120 again, and the heat dissipation efficiency is affected.

In other embodiments, the second heat dissipating opening 130 is an annular opening along the sidewall of the pot cover body 100, so that wind can uniformly pass through all the heat dissipating fins 220 of the heat sink 200, thereby improving the heat dissipating efficiency.

In an embodiment, the lid structure 10 further includes a heat conducting member 600, one side of the accommodating cavity 110 is open, the heat sink 200 is disposed on the heat conducting member 600, and the heat conducting member 600 covers the open side of the accommodating cavity 110. Wherein, hold the chamber 110 and open towards one side of pot body 20, radiator 200 sets up in holding chamber 110 through heat-conducting member 600, conveniently realizes that radiator 200 absorbs the heat in the culinary art chamber 201 through heat-conducting member 600. Meanwhile, food in the cooking cavity 201 can be effectively prevented from entering the accommodating cavity 110 by arranging the heat conducting piece 600, and the stability of the radiator 200 in the accommodating cavity 110 is improved.

Specifically, mounting cavity 112 is open to one side of pan body 20, and heat conduction member 600 is used to mount heat sink 200 in mounting cavity 112.

In the present embodiment, the heat conductive member 600 is made of a heat conductive metal material. Because the heat conduction member 600 faces the cooking cavity 201, the pressure in the cooking cavity 201 can be kept stable during the cooking process, and the heat conduction member 600 is prevented from being deformed under pressure. In other embodiments, the heat-conducting member 600 may be made of other materials with better heat-conducting property.

In one embodiment, the lid body 100 is provided with an exhaust opening, and the exhaust opening is provided with an exhaust valve. The exhaust port communicates with the cooking chamber 201. When pressure relief is needed, the exhaust valve can be further opened, and the pressure relief speed of the pressure cooker 1 can be further improved.

The lid structure 10 of any of the above embodiments can also be applied to other cooking pots, such as an electric rice cooker.

In an embodiment, the pressure cooker 1 further includes an inner cooker 30 and a heater 40, the inner cooker 30 is disposed in the cooker body 20, the inner cooker 30 encloses a cooking cavity 201, and the heater 40 is disposed on the cooker body 20 and is used for heating the inner cooker 30, so as to heat food in the cooking cavity 201.

When the pressure cooker 1 is used, after food is cooked and pressure relief is required, heat in the cooking cavity 201 is conducted to the radiator 200 through the heat conducting member 600. The starting motor 400 drives the fan 300 to work, and the cold air is sucked in from the first heat dissipation opening 120 through the air guiding cavity 114. The cool air is blown toward the radiator 200 by the blower fan 300. After the heat exchange between the cold air and the heat dissipation fins 220 is performed, the cold air is blown out from the second heat dissipation opening 130, so as to complete the cooling of the food in the cooking cavity 201.

According to an ideal gas state equation: where P may refer to the pressure within the cooking chamber 201, V is the volume of the ideal gas, n represents the amount of gaseous material, and T may represent the temperature within the cooking chamber 201, and R is the ideal gas constant. When the temperature T in the cooking chamber 201 decreases, the pressure P in the cooking chamber 201 also decreases. The initial pressure in the cooking cavity 201 is higher than the atmospheric pressure of the environment, and if the cooking cavity 201 is used for cooking liquid food such as soup or porridge, when the pressure P in the cooking cavity 201 is reduced, the liquid food can be boiled quickly again, so that the heat exchange is greatly strengthened, the heat is conducted to the radiator 200 through the heat conducting plate, and the cold air blown by the fan 300 exchanges heat, so that the temperature reduction speed in the pot of the cooking cavity 201 is increased. When the temperature in the cooking cavity 201 is decreased so that the pressure P in the cooking cavity 201 is equal to the atmospheric pressure P0, the pressure relief process is completed, and the lid structure 10 can be opened normally. The pressure cooker 1 can shorten the pressure relief time from 30min to about 10min, and greatly improves the user experience.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A heat sink, comprising:

a base;

2. The heat sink as claimed in claim 1, wherein the heat dissipating fins are recessed toward a side of the rotation direction of the fan.

3. The heat sink as claimed in claim 1, wherein the fin root forms a wall of the mounting hole, and an angle between a side wall of the heat dissipating fin facing the rotation direction of the fan and a tangent line of the wall of the mounting hole is 10 ° to 90 °.

4. A heat sink as claimed in any one of claims 1 to 3, wherein a line connecting the fin root and the axis of the mounting hole forms a first line, and a line connecting the fin tail and the axis of the mounting hole forms a second line, the second line being at an angle of 0 ° to 60 ° to the first line.

5. A pot cover structure is characterized by comprising:

a pot cover body;

the heat sink of any of claims 1-4, disposed within the lid body; and

6. The pot cover structure of claim 5, wherein the pot cover body is formed with an accommodating cavity, the pot cover body is further provided with a first heat dissipation opening and a second heat dissipation opening spaced from the first heat dissipation opening, and the second heat dissipation opening and the first heat dissipation opening are both communicated with the accommodating cavity; the radiator is arranged in the accommodating cavity, the first radiating port is communicated with the mounting hole, and the second radiating port is communicated with the gap between the radiating fins.

7. The lid structure of claim 6, wherein the first heat dissipation opening is opened on a side wall of the lid body.

8. The pot cover structure of claim 7, further comprising an air guide member, wherein the air guide member is disposed in the accommodating cavity, the air guide member divides the accommodating cavity into an installation cavity and an air guide cavity, an air opening is formed in the air guide member, the installation cavity is communicated with the air guide cavity through the air opening, the heat sink is disposed in the installation cavity, the fan is correspondingly disposed at the air opening, the first heat dissipation opening is communicated with the air guide cavity, and the second heat dissipation opening is communicated with the installation cavity.

9. The pan cover structure of claim 8, wherein a heat sink is disposed within the air-guide cavity.

10. The pot cover structure of any of claims 7-9, wherein the second heat dissipation opening is an annular opening along the side wall of the pot cover body; or

11. The lid structure of claim 10, wherein if the number of the second heat dissipating openings is at least two, the second heat dissipating openings are disposed in a staggered manner from the first heat dissipating openings.

12. The pot cover structure according to any one of claims 6 to 9, further comprising a heat conduction member, wherein one side of the receiving chamber is open, the heat sink is provided on the heat conduction member, and the heat conduction member covers the open side of the receiving chamber.

13. The pot cover structure of any of claims 5-9, wherein the fan is a centrifugal fan.

14. A pressure cooker, comprising:

a pot body formed with a cooking cavity; and

the lid structure of any one of claims 5-13, wherein the lid body is capable of being placed over the cooking cavity.