Pressure cooking appliance, sealing ring thereof and inner container thereof

Abstract

The invention provides a pressure cooking appliance, a sealing ring thereof and an inner container thereof, wherein the sealing ring of the pressure cooking appliance comprises a sealing portion and amounting portion; the mounting portion is used for being connected with an upper cover of the pressure cooking appliance; the sealing portion comprises a lower lip edge used for carrying out contactsealing with the inner wall surface of the inner container of the pressure cooking appliance; the surface of the lower lip edge used for carrying out contact sealing with the inner wall surface of theinner container comprises a smooth surface portion and a rough surface portion; the inner wall surface of the inner container of the pressure cooking appliance comprises a smooth surface portion anda rough surface portion, and the smooth surface portion and the rough surface portion are used for carrying out contact sealing with the lower lip edge of the sealing ring of the pressure cooking appliance; according to the pressure cooking appliance, the sealing ring thereof and the inner container thereof, the cover plate can freely fall by virtue of self gravity without bulging, so that the cover teeth of the upper cover of the pressure cooking appliance are not directly adhered to the pot teeth of the inner container correspondingly, the problem of pot suction is avoided, and meanwhile, the cover opening friction force in a hot state is reduced, so that no air leakage in the heating process is well achieved, and the cover can be smoothly opened and closed in the hot state after being exhausted.

Description

technical field [0001] The invention relates to the field of pressure cooking appliances, in particular to a sealing ring of a pressure cooking appliance, an inner tank of a pressure cooking appliance and a pressure cooking appliance. Background technique [0002] Due to the complex structure of electric pressure cooking appliances and the high pressure inside the working process, the common pain points in the industry are poor opening and closing of the hot state lid and steam leakage during the cooking process. The solutions to these two pain points are often contradictory, increasing Airtight measures often lead to poor opening of the cover, and easy measures to open the cover also easily lead to unqualified airtightness. In the process of realizing the present invention, the inventor found that the prior art has the following problems: the sealing ring affects the thermal state. It is the core component of poor opening and closing lids and steam leakage during cooking, a...

AI Technical Summary

Problems solved by technology

[0002] Due to the complex structure of electric pressure cooking appliances and the high pressure inside the working process, the common pain points in the industry are poor opening and closing of the hot state lid and steam leakage during the cooking process. The solutions to these two pain points are often contradictory, increasing Airtight measures often lead to poor opening of the cover, and easy measures to open the cover also easily lead to unqualified airtightness. In the process of realizing the present invention, the inventor found that the prior art has the following problems: the sealing ring affects the thermal state. It is the core component of poor opening and closing lids and steam leakage during cooking, and has very high requirements for the dimensional accuracy of the sealing ring. If the size of the sealing ring is too small, the cooking process will leak air, and if the size of the sealing ring is large, it will lead to a hot state. The cover cannot be opened, and it has been proved by experiments that even if the diameter of the sealing ring is only 0.1mm, there will be a qualitative difference between the two types of problems. However, in the actual production process, the size of the sealing ring is often difficult to grasp. The precision requirements undoubtedly increase the difficulty of product processing, and lead to low product yield and increased product costs

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