CN211748819U - Pressure-controlled electric pressure cooker - Google Patents

Abstract

The utility model discloses a pressure-controlled electric pressure cooker belongs to kitchen cooking utensil field, has solved the poor problem of electromagnetic wire dish radiating effect of pressure-controlled electric pressure cooker among the prior art. The utility model provides a pressure-controlled electric pressure cooker, including the pot body and pot cover, the pot body is including heat preservation cover and holding in pot courage in the heat preservation cover, pot courage below is equipped with electromagnetic wire coil, the heat preservation cover outside is equipped with pressure switch, a serial communication port, heat preservation cover bottom is equipped with inside extension and inject bottom opening's turn-ups, electromagnetic wire coil assemble in bottom opening and with turn-ups fixed connection, be equipped with the support on the turn-ups the pressure-bearing of pot courage is protruding, the pressure-bearing arch receives pot courage oppression and make the turn-ups produces elastic deformation, turn-ups elastic deformation perhaps electromagnetic wire coil's displacement directly or indirectly touches pressure switch.

Description

Pressure-controlled electric pressure cooker

[ technical field ] A method for producing a semiconductor device

The utility model relates to a kitchen cooking utensil especially relates to pressure-controlled electric pressure cooker.

[ background of the invention ]

The pressure-controlled electric pressure cooker mainly realizes the control of cooking pressure through a pressure switch, namely when the cooking pressure in a cooker reaches the rated pressure, an electric control system controls a heater to stop heating, thereby limiting the further rise of the pressure.

In the pressure-controlled electric pressure cooker with the electromagnetic wire coil as the heating device, the elastic supporting structure and the electromagnetic wire coil are arranged inside the heat-insulating cover of the cooker body, thereby increasing the installation and maintenance difficulty of the devices, and being more unfavorable: the heat in the heat preservation cover can not be discharged quickly in the cooking process, and a heat dissipation system (such as a heat dissipation fan) of the electric pressure cooker is usually arranged outside the heat preservation cover, so that the electromagnetic wire coil in the heat preservation cover can not be effectively and forcibly dissipated, the temperature rise of the electromagnetic wire coil is caused to be overhigh, and the working reliability and the service life of the electromagnetic wire coil are reduced.

[ Utility model ] content

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a pressure-controlled electric pressure cooker.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the pressure-controlled electric pressure cooker comprises a cooker body and a cooker cover, wherein the cooker body comprises a heat-insulating cover and a cooker liner accommodated in the heat-insulating cover, an electromagnetic wire coil is arranged below the cooker liner, a pressure switch is arranged on the outer side of the heat-insulating cover, a flanging which extends inwards and limits a bottom opening is arranged at the bottom of the heat-insulating cover, the electromagnetic wire coil is assembled at the bottom opening and is fixedly connected with the flanging, the flanging is pressed by the cooker liner to enable the flanging to generate elastic deformation, and the elastic deformation of the flanging or the displacement of the electromagnetic wire coil directly or indirectly touches the pressure switch.

In the above pressure-controlled electric pressure cooker, the flange is provided with a pressure-bearing protrusion for supporting the cooker liner, and the pressure-bearing protrusion is pressed by the cooker liner to make the flange elastically deformed

In the above pressure-controlled electric pressure cooker, the pressure-bearing protrusion is integrally formed on the turned edge.

In the pressure-controlled electric pressure cooker, the turned edge is provided with at least two pressure-bearing bulges at intervals along the circumferential direction, and the cooker liner is supported by the at least two pressure-bearing bulges together.

In the pressure-controlled electric pressure cooker, the elastic deformation of the part of the flange between the inner side of the pressure-bearing bulge and the inner side of the flange directly or indirectly triggers the pressure switch.

In the pressure-controlled electric pressure cooker, the top of the pressure-bearing bulge is in a platform shape.

In the above pressure-controlled electric pressure cooker, the heat-insulating cover includes an upper cover body and a lower cover body which are separately arranged, the bottom of the lower cover body extends inwards to form the flange, and the elastic modulus of the lower cover body is smaller than that of the upper cover body and/or the wall thickness of the lower cover body is smaller than that of the upper cover body.

In the pressure-controlled electric pressure cooker, the thickness of the flanging is smaller than that of other parts of the heat-insulating cover.

In the pressure-controlled electric pressure cooker, the upper surface of the electromagnetic wire coil is provided with the supporting pad, and the upper surface of the supporting pad is higher than the upper surface of the pressure-bearing bulge.

In the above pressure-controlled electric pressure cooker, the pressure switch includes a pressure control switch for pressure control and/or a pressure protection switch for overpressure protection.

The utility model has the advantages that:

the utility model provides a pressure-controlled electric pressure cooker, be equipped with inside extension and inject the turn-ups of bottom opening in the heat preservation cover bottom, electromagnetic wire coil assembles in the bottom opening, that is to say, at least electromagnetic wire coil's lower surface can expose outside the heat preservation cover through the bottom opening to increase electromagnetic wire coil's heat dissipation space in the pot body, do benefit to electromagnetic wire coil heat dissipation, under the self-condition of taking cooling system of the pot body, cooling system can directly carry out the forced heat dissipation to electromagnetic wire coil, provide more favorable heat dissipation condition, thereby guarantee electromagnetic wire coil's operational reliability, extension device life; in addition, because the heat preservation cover is provided with the bottom opening, the material is saved, and the manufacturing cost of the heat preservation cover is reduced.

The utility model discloses a displacement through turn-ups elastic deformation or electromagnetic coil directly or indirectly touches the pressure switch action to can realize that electromagnetic heating's pressure cooker also can control the pressure with pressure switch, not come the inside pressure of perception cavity with top temperature sensor, make electromagnetic heating's pressure control simpler, the cost is lower.

The utility model discloses an electromagnetic wire coil and turn-ups fixed connection are equipped with the pressure-bearing arch that supports the pot courage on the turn-ups, and the pressure-bearing arch receives the pot courage oppression and makes the turn-ups produce elastic deformation, and turn-ups elastic deformation or electromagnetic wire coil's displacement directly touches pressure switch or indirectly. Compared with the prior art in which the elastic supporting structure of the independent arrangement is adopted to support the pot liner, the utility model discloses utilize the protruding pot liner that supports of pressure-bearing on the turn-ups of heat preservation cover bottom, can save the elastic supporting structure of independent arrangement, save elastic supporting structure's part cost and installation cost promptly, under the condition of saving elastic supporting structure, the assembly and the maintenance of electromagnetic wire coil and heat preservation cover will be more convenient.

Compared with an independently arranged elastic supporting structure, the elastic deformation capacity of the flanging at the bottom of the heat-insulating cover is weak, the pressure switch is not easily triggered by the elastic deformation, and the action precision of the pressure switch needs to be improved for realizing pressure control; therefore, the utility model discloses set up the pressure-bearing arch on the turn-ups, the pot courage concentrates on the pressure-bearing arch to turn-ups pressure when moving down on, makes the elasticity deformation volume that the turn-ups produced can satisfy pressure detection's needs. It should be noted that: because the electromagnetic wire coil is fixedly connected with the flanging, the flanging generates elastic deformation and simultaneously drives the electromagnetic wire coil to synchronously move downwards, and therefore, the pressure switch can be directly or indirectly triggered by the displacement of the electromagnetic wire coil.

The pressure bearing bulge is integrally formed on the flanging. The integrally formed structure is convenient to process, the assembly procedures are reduced, and the production efficiency of a production line is improved; because of the integrated structure, the bearing bulge and the flanging can be kept consistent at least in the aspect of material strength, and the pressure detection precision is prevented from being reduced due to the fact that deformation is inconsistent when the bearing bulge and the flanging are pressed.

At least two pressure-bearing bulges are arranged on the turnup edge at intervals along the circumferential direction, and the pot liner is supported by the at least two pressure-bearing bulges together. The flanging forms multi-point support for the pot container in the circumferential direction, the supporting force for the pot container is uniformly distributed in the circumferential direction, and the permanent deformation caused by the inclination of the pot container and the overlarge local stress of the flanging is avoided.

The elastic deformation of the part of the flanging, which is positioned between the inner side of the pressure-bearing bulge and the inner side of the flanging, directly or indirectly triggers the pressure switch. Because the turn-ups is inwards extended from the bottom of the heat-insulating cover, the outer side of the turn-ups is connected with the side wall of the heat-insulating cover, when the cooker liner is pressed on the pressure-bearing bulge, the elastic deformation quantity of the part between the inner side of the pressure-bearing bulge and the inner side of the turn-ups is the largest, and the pressure switch is directly or indirectly triggered by the part, so that the reliability is better.

The top of the pressure bearing bulge is in a platform shape. When the cooker liner is pressed on the pressure bearing bulges, the tops of the pressure bearing bulges are in direct contact with the cooker liner, and the tops of the pressure bearing bulges are designed into a platform shape to play a good supporting role and reduce the abrasion on the surface of the cooker liner.

The heat-insulating cover comprises an upper cover body and a lower cover body which are arranged in a split mode, the bottom of the lower cover body extends inwards to form the flanging, and the elastic modulus of the lower cover body is smaller than that of the upper cover body and/or the wall thickness of the lower cover body is smaller than that of the upper cover body. Generally, the mouth of the heat-insulating cover is provided with pot teeth for being buckled with a pot cover, the electric pressure cooker meets the safe use requirement, the pot teeth must reach the thickness required by safety regulations, the pot teeth are directly formed in the stretch forming of the heat-insulating cover, the wall thickness of the heat-insulating cover also meets the corresponding requirement, the elastic deformation capacity of a flanging is weakened due to the increase of the wall thickness, and the pressure detection is not facilitated. In view of this, the utility model provides a split type heat preservation cover's conception, the heat preservation cover is including the upper cover body and the lower cover body that the components of a whole that can function independently set up promptly, and the upper cover body increases the elastic modulus of wall thickness and/or self material to guarantee pot tooth intensity, improve the safety in utilization, the lower cover body reduces the elastic modulus of wall thickness and/or self material, compromises intensity and elastic deformation ability, in order to satisfy pressure detection's needs.

The thickness of the flanging is smaller than that of other parts of the heat-preservation cover. The heat preservation of this scheme covers as integrated into one piece structure, nevertheless in stretch forming or later stage course of working, reduces the turn-ups wall thickness, promotes its elastic deformation ability to satisfy pressure detection's needs.

The upper surface of the electromagnetic wire coil is provided with a supporting pad, and the upper surface of the supporting pad is higher than the upper surface of the pressure-bearing bulge. After the cooker liner is placed into the heat-insulating cover, the bottom of the cooker liner contacts with the supporting pad firstly, after the cooker liner is heated and pressed upwards, the cooker liner moves downwards and compresses the supporting pad until the cooker liner is abutted to the pressure-bearing bulge on the flanging, and the pressure-bearing bulge can be pressed to enable the flanging to generate elastic deformation, so that the abrasion of the pressure-bearing bulge on the surface coating of the cooker liner can be reduced, and the service life of the cooker liner is prolonged.

The flanging is provided with a concave sinking platform, the periphery of the electromagnetic wire coil is provided with a lug, and the lug is matched in the sinking platform. The lug is matched with the inside of the sinking platform to limit the installation position of the electromagnetic wire coil relative to the flanging and limit the relative rotation of the electromagnetic wire coil, so that the electromagnetic wire coil is conveniently and fixedly connected with the flanging; because the sinking platform is the sunken formation of turn-ups, relative turn-ups, can further reduce electromagnetic wire coil's mounting height for electromagnetic wire coil has more positions to stretch out from the bottom opening, promotes the radiating effect.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

[ description of the drawings ]

The invention will be further explained with reference to the drawings:

fig. 1 is a schematic structural view of a pressure-controlled electric pressure cooker according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of the pot container placed in the heat-insulating cover according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic structural view of the inner pot container placed in the heat-insulating cover according to an embodiment of the present invention;

FIG. 5 is a partial enlarged view of FIG. 4 at B;

fig. 6 is a schematic structural diagram of an electromagnetic wire coil according to an embodiment of the present invention;

FIG. 7 is a schematic view of an upper housing structure of the heat-retaining cover according to an embodiment of the present invention;

fig. 8 is a schematic view of a lower cover body structure of the heat preservation cover according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a joint between the lower cover and the upper cover according to an embodiment of the present invention.

Reference numerals:

100 pan bodies;

200 of a pot cover;

300 heat preservation cover, 310 flanging, 311 pressure bearing bulge, 312 sinking platform, 313 mounting hole, 320 bottom opening, 330 upper cover body, 331 pot tooth, 340 lower cover body and 341 step;

400 of a boiler liner;

500 electromagnetic wire coils, 510 lugs, 520 screw posts;

600 pressure switch, 610 switch bracket;

700 supporting the pad.

[ detailed description ] embodiments

The utility model provides a pressure-controlled electric pressure cooker, including the pot body and pot cover, the pot body is including heat preservation cover and holding in pot courage in the heat preservation cover, pot courage below is equipped with electromagnetic wire coil, the heat preservation cover outside is equipped with pressure switch, heat preservation cover bottom is equipped with to inside extension and inject bottom open-ended turn-ups, electromagnetic wire coil assemble in bottom opening and with turn-ups fixed connection, be equipped with the support on the turn-ups the pressure-bearing of pot courage is protruding, the pressure-bearing arch receives pot courage oppression and makes the turn-ups produces elastic deformation, turn-ups elastic deformation perhaps electromagnetic wire coil's displacement directly or indirectly touches pressure switch. In the utility model, the bottom opening defined by the bottom flanging of the heat-insulating cover at least enables the lower surface of the electromagnetic wire coil to be exposed outside the heat-insulating cover through the bottom opening, thereby increasing the heat dissipation space of the electromagnetic wire coil in the pot body, being beneficial to the heat dissipation of the electromagnetic wire coil, and under the condition that the pot body is provided with a heat dissipation system, the heat dissipation system can directly carry out forced heat dissipation on the electromagnetic wire coil, thereby providing more favorable heat dissipation conditions, ensuring the working reliability of the electromagnetic wire coil and prolonging the service life of devices; in addition, because the heat preservation cover is provided with the bottom opening, the material is saved, and the manufacturing cost of the heat preservation cover is reduced.

Compared with the prior art in which the elastic supporting structure of the independent arrangement is adopted to support the pot liner, the utility model discloses utilize the protruding pot liner that supports of pressure-bearing on the turn-ups of heat preservation cover bottom, can save the elastic supporting structure of independent arrangement, save elastic supporting structure's part cost and installation cost promptly, under the condition of saving elastic supporting structure, the assembly and the maintenance of electromagnetic wire coil and heat preservation cover will be more convenient.

The technical solutions of the embodiments of the present invention are explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-3 and 8, the pressure-controlled electric pressure cooker provided in an embodiment of the present invention includes a cooker body 100 and a cooker cover 200, wherein the cooker body 100 includes a heat-insulating cover 300 and a cooker liner 400 accommodated in the heat-insulating cover 300, an electromagnetic wire coil 500 is disposed below the cooker liner 400, a pressure switch 600 is disposed outside the heat-insulating cover 300, a flange 310 extending inward and defining a bottom opening 320 is disposed at the bottom of the heat-insulating cover 300, and the electromagnetic wire coil 500 is assembled to the bottom opening 320; the turn-up 310 is provided with a pressure-bearing protrusion 311 for supporting the pot core 400, the pressure-bearing protrusion 311 is pressed by the pot core 400 to make the turn-up 310 generate elastic deformation, and the elastic deformation of the turn-up 310 directly or indirectly touches the pressure switch 600. Of course, the flanging can be directly pressed by the pot liner to enable the flanging to generate elastic deformation, but a pressure-bearing bulge is not arranged, and when the pressure-bearing bulge is not arranged, the bottom of the pot liner is directly contacted with the upper surface of the flanging, so that the elastic deformation is generated. After the pressure bearing protrusion is arranged, the local part of the flanging, namely the position corresponding to the pressure bearing protrusion, is larger than other positions due to elastic deformation, and the pressure switch is triggered.

According to the pressure-controlled electric pressure cooker of the embodiment, the cover 200 is buckled with the opening part of the heat-insulating cover 300, a cooking cavity is formed between the cover 200 and the cooker liner 400, the pressure cooking process is started, the pressure in the cooking cavity is continuously increased, the pressure pushes the cooker liner 400 to move downwards, and the pressure-bearing protrusion 311 is pressed by the cooker liner 400 to enable the flanging 310 to generate elastic deformation. The pressure switch 600 is fixedly arranged on the heat preservation cover 300 through a switch bracket 610, and the pressure switch 600 is positioned below the flanging 310 and is directly abutted against the flanging 310, so that the elastic deformation generated by the flanging 310 can directly touch the pressure switch 600. The specific structure and working principle of the pressure switch 600 can refer to the utility model patent with the publication number "CN 202408447U" and the name "a pressure-controlled electric pressure cooker".

Normally, the pressure switch 600 is set with a cut-off pressure, when the cooking pressure reaches the set cut-off pressure, the pressure switch 600 is cut off by pushing the flange 310, and the main control board of the electric pressure cooker changes the output power of the electromagnetic wire coil 500 after receiving the cut-off signal, so as to adjust the cooking pressure. Compare the mode of detecting pot courage temperature and controlling cooking pressure, adopt pressure switch 600 to detect pot courage 400 displacement, can realize the stability, accurate control to cooking pressure.

Of course, the utility model discloses be not limited to this, under the limited circumstances in pot body 100 bottom space, pressure switch 600 also can set up the lateral part of the pot body 100, also keeps warm the lateral wall outside of cover 300 promptly, sets up transmission structure (like lever assembly etc.) between pressure switch 600 and turn-ups 310, and turn-ups 310's elastic deformation acts on transmission structure and indirectly touches pressure switch 600.

Referring to fig. 2, 3 and 8, in the present embodiment, the pressure-bearing protrusion 311 is integrally formed on the flange 310, for example, the pressure-bearing protrusion 311 is formed on the flange 310 by stamping, the pressure-bearing protrusion 311 protrudes upward from the inner side of the flange 310, and the inside of the pressure-bearing protrusion is a hollow structure. The integrally formed structure is convenient to process, the assembly procedures are reduced, and the production efficiency of a production line is improved; due to the integral forming structure, the pressure bearing protrusion 311 and the flanging 310 can be kept consistent at least in the aspect of material strength, and the pressure detection precision is prevented from being reduced due to the fact that deformation amounts of the pressure bearing protrusion 311 and the flanging 310 are inconsistent when the pressure bearing protrusion and the flanging 310 are pressed.

Preferably, in this embodiment, at least two pressure-bearing protrusions 311 are arranged on the flange 310 at intervals along the circumferential direction, and the pot core 400 is supported by the at least two pressure-bearing protrusions 311 together. The following are exemplary: three pressure-bearing protrusions 311 are uniformly distributed on the flanging 310 along the circumferential direction to form three-point support, so that the supporting force for the pot liner 400 is uniformly distributed in the circumferential direction, and the phenomenon that the pot liner 400 is inclined and the flanging 310 is subjected to excessive local stress to cause permanent deformation is avoided. Of course, the number of the bearing protrusions 311 is not limited thereto, and may be two, four, or more.

Referring to fig. 4-6, in the present embodiment, in order to fixedly connect the electromagnetic wire coil 500 and the flange 310, a plurality of lugs 510 extend from the periphery of the electromagnetic wire coil 500, screw posts 520 are disposed on the lugs 510, mounting holes 313 are correspondingly disposed on the flange 310, and screws pass through the mounting holes 313 and are locked in the screw posts 520, so as to fixedly connect the electromagnetic wire coil 500 and the flange 310. Referring to fig. 8, preferably, in order to fix the electromagnetic wire coil 500 more conveniently, the flange 310 of the present embodiment is provided with a concave sinking platform 312, the lug 510 is fitted in the sinking platform 312 to define an installation position of the electromagnetic wire coil 500 relative to the flange 310, and limit the relative rotation of the electromagnetic wire coil 500, so as to facilitate the fixed connection of the electromagnetic wire coil 500 and the flange 310; because the sinking platform 312 is formed by sinking the flanging 310, the installation height of the electromagnetic wire coil 500 can be further reduced relative to the flanging 310, so that more parts of the electromagnetic wire coil 500 extend out of the bottom opening 320, and the heat dissipation effect is improved.

As can be seen from fig. 4, when the electromagnetic wire coil 500 is disposed in the bottom opening 320, one side of the electromagnetic wire coil 500, around which a coil is wound, faces downward and extends out of the bottom opening 320, compared with the prior art in which the electromagnetic wire coil 500 is integrally limited in the heat-insulating cover 300, the embodiment increases the heat dissipation space of the electromagnetic wire coil 500 in the pot body 100, which is beneficial to heat dissipation of the electromagnetic wire coil 500, and utilizes a heat dissipation system (such as a heat dissipation fan) of the pot body 100 to directly perform forced heat dissipation on the electromagnetic wire coil 500, thereby providing more favorable heat dissipation conditions, ensuring the working reliability of the electromagnetic wire coil 500 and prolonging the service life of the device; in addition, because the heat-insulating cover 300 is provided with the bottom opening 320, materials are saved, and the manufacturing cost of the heat-insulating cover 300 is reduced.

Compared with the prior art in which the pot container is supported by the independently arranged elastic supporting structure, the pot container 400 is supported by the pressure bearing protrusion 311 on the flange 310 at the bottom of the heat-insulating cover 300 in the embodiment, so that the independently arranged elastic supporting structure can be omitted, namely, the part cost and the installation cost of the elastic supporting structure are saved, and the electromagnetic wire coil 500 and the heat-insulating cover 300 can be assembled and maintained more conveniently under the condition of omitting the elastic supporting structure.

Compared with an independently arranged elastic supporting structure, the elastic deformation capacity of the flanging 310 at the bottom of the heat-insulating cover 300 is weak, the pressure switch 600 is not easily triggered by the elastic deformation, and the action precision of the pressure switch 600 needs to be improved for realizing pressure control; therefore, in the embodiment, the pressure-bearing protrusion 311 is arranged on the flange 310, and the pressure on the flange 310 is concentrated on the pressure-bearing protrusion 311 when the cooker liner 400 moves downwards, so that the amount of elastic deformation generated by the flange 310 can meet the requirement of pressure detection.

It should be noted that: because electromagnetic wire coil 500 and turn-ups 310 fixed connection, turn-ups 310 also can drive electromagnetic wire coil 500 and move down in step when producing elastic deformation, consequently, in other embodiments of the utility model, also can go to touch pressure switch 600 directly or indirectly by electromagnetic wire coil 500's displacement, for example: pressure switch 600 sets up in electromagnetic wire coil 500 below and offsets with electromagnetic wire coil 500, detects electromagnetic wire coil 500 displacement volume and realizes pressure control.

Referring to fig. 2 and 3, in an embodiment of the present invention, based on the above embodiment, the top of the pressure-bearing protrusion 311 is platform-shaped, that is, the top surface of the pressure-bearing protrusion 311 is a plane, when the pot liner 400 presses the pressure-bearing protrusion 311, the top of the pressure-bearing protrusion 311 directly contacts the pot liner 400, and the top of the pressure-bearing protrusion 311 is designed to be platform-shaped to support the pot liner 400 well and reduce the wear on the surface of the pot liner 400. In the present embodiment, the cross-sectional shape of the top of the bearing protrusion 311 is not particularly limited, and may be square, circular, oval, etc., as long as planar support is achieved.

Referring to fig. 2 and 3, in an embodiment of the present invention, the elastic deformation of the portion a of the flange 310 between the inner side of the bearing protrusion 311 (the side of the bearing protrusion 311 facing the center of the heat-insulating cover 300) and the inner side of the flange 310 (the side of the flange 310 facing the center of the heat-insulating cover 300) directly or indirectly contacts the pressure switch 600. Because the turned edge 310 extends inwards from the bottom of the heat-insulating cover 300, and the outer side of the turned edge 310 is connected with the side wall of the heat-insulating cover 300, when the cooker liner 400 presses the pressure-bearing bulge 311, the elastic deformation amount of the part a between the inner side of the pressure-bearing bulge 311 and the inner side of the turned edge 310 is the largest, and the pressure switch 600 is directly or indirectly touched by the part a, so that the reliability is better.

Referring to fig. 7-9, in an embodiment of the present invention, based on the above embodiment, the heat-insulating cover 300 includes an upper cover 330 and a lower cover 340 which are separately arranged, wherein: the upper cover body 330 is cylindrical, and a plurality of pot teeth 331 are radially and outwardly extended from the upper end of the upper cover body 330 and used for buckling the pot cover 200; the lower cover body 340 is cylindrical, the bottom of the lower cover body 340 extends inward to form a flange 310, the flange 310 has a structure, referring to the previous embodiment, an outward protruding step 341 is formed at the upper part of the lower cover body 340, the lower end of the upper cover body 330 abuts against the step 341, and the overlapped part of the upper cover body 330 and the lower cover body 340 is fixed by means of screw connection, rivet connection, welding connection and the like, so as to form the complete heat preservation cover 300. The wall thickness of the lower cover body 340 is smaller than that of the upper cover body 330, the wall thickness of the upper cover body 330 is increased to ensure the strength of the pot teeth, the use safety is improved, the wall thickness of the lower cover body 340 is reduced, and the strength and the elastic deformation capacity are considered to meet the requirement of pressure detection.

The solution according to the above embodiment can be thought of as: even if the wall thicknesses of the upper cover body 330 and the lower cover body 340 are consistent, the above purpose can be achieved by changing the rigidity of the material, for example, the elastic modulus of the lower cover body 340 is smaller than that of the upper cover body 330, and the elastic modulus of the upper cover body 330 is larger, that is, the rigidity of the material is large, so that the strength of the pot teeth is ensured, and the use safety is improved; the elastic modulus of the lower cover body 340 is small, namely the rigidity of the material is small, and the strength and the elastic deformation capacity are both considered, so that the requirement of pressure detection is met.

Of course, it is also possible to combine the two approaches described above: the wall thickness and modulus of elasticity of lower shell 340 are less than the wall thickness and modulus of elasticity of upper shell 330.

The utility model discloses an in the embodiment, the cover that keeps warm is integrated into one piece structure, nevertheless in stretch forming or later stage course of working, reduces the turn-ups wall thickness, promotes its elastic deformation ability to satisfy pressure measurement's needs.

Referring to fig. 3, in an embodiment of the present invention, the electromagnetic wire coil 500 is provided with a supporting pad 700 on the upper surface, and the supporting pad 700 (in an uncompressed state) has an upper surface higher than the upper surface of the pressure-bearing protrusion 311. The supporting pad 700 is usually made of silica gel or rubber, has good elastic deformation capability, and can buffer the pressure of the pot liner 400. After the pot liner 400 is placed into the heat-insulating cover 300, the bottom of the pot liner 400 contacts with the supporting pad 700 firstly, after heating and pressing upwards, the pot liner 400 moves downwards and compresses the supporting pad 700 until the pot liner 400 abuts against the pressure-bearing bulge 311 on the flanging 310, and the pressure-bearing bulge 311 can be pressed to enable the flanging 310 to generate elastic deformation, so that the abrasion of the pressure-bearing bulge 311 on the surface coating of the pot liner 400 can be reduced, and the service life of the pot liner 400 is prolonged.

In an embodiment of the utility model, according to pressure switch in any preceding embodiment, its purpose of setting for disconnection pressure is controlled/is adjusted cooking pressure, but if the condition that master control board or pressure switch trouble became invalid appears in the practical application, fail in time to cut off the power supply to the heater when cooking pressure reaches rated pressure, the product still probably continues to push up, has the excessive pressure risk, brings the potential safety hazard for the user. For this reason, this embodiment sets up two pressure switches outside the heat preservation cover, namely the pressure control switch that is used for pressure control and the pressure protection switch that is used for overvoltage protection, and the corresponding two trigger bars that set up on the support piece are used for touching pressure control switch and pressure protection switch respectively. When the pressure control switch transmits a disconnection signal to the main control board, the main control board can judge the cooking pressure more accurately so as to control the cooking pressure more accurately; the pressure protection switch is a high-voltage switch, and when the cooking pressure reaches a set high-voltage value, the power supply is cut off, so that overvoltage protection is achieved, and the product is safer to use.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (10)

1. The pressure-controlled electric pressure cooker comprises a cooker body and a cooker cover, wherein the cooker body comprises a heat-insulating cover and a cooker liner accommodated in the heat-insulating cover, an electromagnetic wire coil is arranged below the cooker liner, and a pressure switch is arranged on the outer side of the heat-insulating cover.

2. The pressure-controlled electric pressure cooker according to claim 1, wherein said flange is provided with a pressure-bearing protrusion for supporting said inner pot, said pressure-bearing protrusion being pressed by said inner pot to elastically deform said flange.

3. The pressure-controlled electric pressure cooker according to claim 2, wherein said pressure-bearing protrusion is integrally formed on said flap.

4. The pressure-controlled electric pressure cooker according to claim 2, wherein at least two pressure-bearing protrusions are arranged on the turned edge at intervals along the circumferential direction, and the at least two pressure-bearing protrusions support the cooker liner together.

5. The pressure-controlled electric pressure cooker according to claim 2, wherein the elastic deformation of the portion of the flange between the inner side of the pressure-bearing protrusion and the inner side of the flange directly or indirectly activates the pressure switch.

6. The pressure-controlled electric pressure cooker according to claim 2, wherein the top of said pressure-bearing protrusion is platform-shaped.

7. The pressure-controlled electric pressure cooker according to claim 1, wherein the heat-insulating cover comprises an upper cover body and a lower cover body which are separately arranged, the bottom of the lower cover body extends inwards to form the flange, and the elastic modulus of the lower cover body is smaller than that of the upper cover body and/or the wall thickness of the lower cover body is smaller than that of the upper cover body.

8. The pressure-controlled electric pressure cooker according to claim 1, wherein the thickness of the flange is smaller than the thickness of other parts of the heat-insulating cover.

9. The pressure-controlled electric pressure cooker according to any one of claims 2 to 6, wherein the upper surface of said electromagnetic wire coil is provided with a support pad, and the upper surface of said support pad is higher than the upper surface of said pressure-bearing protrusion.

10. The pressure-controlled electric pressure cooker according to one of claims 1 to 7, characterized in that the pressure switch comprises a pressure control switch for pressure control and/or a pressure protection switch for overpressure protection.

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