CN110946470B

CN110946470B - Electric pressure cooker

Info

Publication number: CN110946470B
Application number: CN201811133469.7A
Authority: CN
Inventors: 彭锋
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2021-05-07
Anticipated expiration: 2038-09-27
Also published as: CN110946470A

Abstract

The invention provides an electric pressure cooker, comprising: the pot body and the pot cover that articulates on the pot body are equipped with inductance coils and the magnetic conduction spare that neighbouring inductance coils set up on the pot cover, and magnetic conduction spare rotates to be installed on the pot cover and is in vertical state all the time under self action of gravity, and when the pot cover switches between closing the lid state and the state of uncapping, the projection area on perpendicular to inductance coils surface of magnetic conduction spare changes, makes inductance coils's inductance value change to whether the judgement pot cover is opened according to inductance coils's inductance value change. According to the electric pressure cooker, the projection area of the magnetic conduction piece perpendicular to the surface of the inductance coil is changed when the cooker cover is switched between the cover opening and closing states, so that the inductance of the inductance coil is changed, whether the cooker cover is opened or not is judged, the cooker cover can be directly opened and boiled without rotating the cooker cover, the operation steps of products are simplified, and the problem that cooker teeth are bumped and even deformed due to the fact that a user forgets to rotate the cooker cover is solved.

Description

Electric pressure cooker

Technical Field

The invention relates to the field of household appliances, in particular to an electric pressure cooker.

Background

The existing conjoined electric pressure cooker product needs to be provided with a cover-closing in-place detection device in order to prevent the product from being heated when the cooker cover is not screwed in place or not screwed in place and the cooker cover flies out of the cooker body after the cooker cover is pressed, and the product can be heated only when the cooker cover is screwed in place. When the cover is opened, the cover is required to be rotated from a buckling state to a non-buckling state, and then the cover is uncovered, so that the cover is positioned at an angle of 0 to 45 degrees with the vertical direction, and a user can obtain or operate food in the inner pot. In the process of uncovering, the pot cover is not rotated in the process from the state that the pot cover is not buckled to the state that the pot cover is uncovered, so after the pot cover is uncovered, the cover opening and closing detection device in the existing scheme still identifies the product as an uncovering state, and the product can not be heated at the moment. When a user needs to open the cover to boil, the user needs to rotate the pot cover in the state after the pot cover is uncovered, so that the detection device in the pot cover identifies the state of the pot cover as a buckling state, and the product can start to be heated at the moment.

In the existing scheme, when the cover is opened and the pot cover needs to be closed, a user needs to rotate the pot cover to enable the pot cover to be in an open state, and then the pot cover can be closed downwards. However, after the cover is opened and the cooker is boiled, a user often forgets that the cooker cover needs to be rotated back to the cover opening state to close the cooker cover downwards, but directly presses the cooker cover downwards when the cooker cover is not rotated, so that the cooker teeth on the cooker cover collide with the cooker teeth on the outer cooker, mutual collision between the cooker teeth and the outer cooker is easily caused, and even the cooker teeth deform, so that the cooker cover is not closed well; and this current scheme complex operation, the pot lid that needs to rotate when uncapping and boiling, need rotate the pot lid once more after accomplishing to uncap and boiling, so there is very big improvement space in this current scheme.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art.

Therefore, the invention aims to provide the electric pressure cooker.

In order to achieve the above object, the technical scheme of the invention provides an electric pressure cooker, which comprises: a pan body; and the pot cover is hinged to the pot body, an inductance coil and a magnetic conduction piece adjacent to the inductance coil are arranged on the pot cover, the magnetic conduction piece is rotatably installed on the pot cover and is always in a vertical state under the action of self gravity, when the pot cover is switched between a cover closing state and a cover opening state, the magnetic conduction piece is perpendicular to the projection area on the surface of the inductance coil, so that the inductance value of the inductance coil is changed, and whether the pot cover is opened or not is judged according to the inductance value change of the inductance coil.

The electric pressure cooker provided by the technical scheme of the invention is characterized in that the cover is provided with the inductance coil and the magnetic conduction member (such as an iron sheet), the inductance coil is fixed on the cover and is a part of the closed circuit, the magnetic conduction member is rotatably arranged on the cover and is always in a vertical state under the action of self gravity, when the cover is switched to an open-close state, the magnetic conduction member is always in a vertical state under the action of gravity, the inductance coil can turn over a certain angle along with the cover, so that the projection area of the magnetic conduction member on the surface vertical to the inductance coil changes before and after the cover is uncovered, the inductance of the inductance coil before and after the magnetism of the magnetic conduction member is gathered by the magnetic conduction member, and the inductance of the inductance coil before and after the magnetism of the magnetic conduction member is gathered, so that whether the cover is uncovered can be judged by uncovering the inductance of the inductance coil before and after the cover is uncovered, further, the rotation-in-place detection switch on the cover can be realized even if the cover, in this case the product can also be heated normally; by adopting the scheme of the invention, after the pot cover is uncovered, the product can be normally heated without rotating the pot cover, namely, the pot cover is directly opened for boiling without rotating the pot cover like the existing scheme so that the pot cover is in a screwing state; after the completion was uncapped and is boiled, above-mentioned scheme also need not to make the pot cover be in and close the lid state that targets in place like current scheme need again, so the operating procedure of product has both been simplified to above-mentioned scheme, also thoroughly avoided the product to accomplish uncap and boiled the back, forget to open the lid state with the pot cover directly down press the pot tooth that the pot cover leads to on the pot cover to collide with on the pot tooth of outer pot when the user, lead to both by the risk that the flower is bumped or pot cover pot tooth warp, thereby the experience effect of product has been promoted.

In addition, the electric pressure cooker provided by the technical scheme of the invention can also have the following additional technical characteristics:

in the above technical solution, preferably, the inductance coil is vertically installed on the lid, the magnetic conducting member is a sheet member and vertically disposed on one side of the inductance coil, and the magnetic conducting member is parallel to the inductance coil when the lid is in a closed state.

Above-mentioned design realizes locating the pot cover side by side with magnetic conduction spare and inductance coil for inductance coil and magnetic conduction spare arrangement structure on the pot cover are more simplified, and when realizing that the pot cover is in the state of closing the lid (horizontal position promptly), magnetic conduction spare is parallel with inductance coil, and the magnetic conduction spare is great at the projected area on the surface of perpendicular to inductance coil this moment, and the magnetic energy that magnetic conduction spare was gathered is stronger, and inductance coil's magnetism is felt line and is passed through the quantity of magnetic conduction spare more, and inductance coil's inductance is great.

In the above technical solution, preferably, when the lid is in a closed state, a distance between the magnetic conducting member and the inductance coil is less than 30 mm.

Because the magnetic conductive member can gather the magnetic induction lines of the inductance coil, when the distance between the magnetic conductive member with fixed thickness and the inductance coil in the closed circuit is close enough, the larger the projection area of the magnetic conductive member perpendicular to the surface of the inductance coil is, the stronger the magnetic gathering capability of the magnetic conductive member is, the more the number of the magnetic induction lines of the inductance coil passing through the magnetic conductive member is, and the larger the inductance of the inductance coil is at the moment; when the designed pot cover is in a closed state, the distance between the magnetic conduction piece and the inductance coil is smaller than 30mm, so that the inductance difference of the inductance coil before and after the pot cover is uncovered is obvious, and the accuracy of judging whether the pot cover is uncovered according to the inductance change of the inductance coil before and after the pot cover is uncovered is improved.

In the above technical solution, preferably, the upper portion of the magnetic conducting member is rotatably mounted on the lid, and when the lid is opened to an open state forming an angle of 45 ° to 135 ° with the horizontal direction, the angle between the magnetic conducting member and the inductance coil is within a range of 45 ° to 135 °.

Before and after the cover of the product is opened, the magnetic conduction piece can rotate around the hinge structure on the upper part of the magnetic conduction piece, so that the projection area of the magnetic conduction piece, which is vertical to the surface of the inductance coil, can be changed before and after the cover is opened, and when the pot cover is in a horizontal position (namely, a cover closing state), the projection area of the magnetic conduction piece, which is vertical to the surface of the inductance coil, is larger because the magnetic conduction piece is parallel to the inductance coil, so that the magnetic conduction piece can gather more magnetic induction lines of the inductance coil, and the inductance value of the inductance coil is larger at; after the pot cover is uncovered, the pot cover is opened to form an angle of 45-135 degrees with the horizontal direction, the inductance coil is turned over to form an angle of 135-225 degrees with the horizontal direction, the magnetic conduction piece can rotate around the hinge structure at the top of the magnetic conduction piece under the influence of gravity to enable the magnetic conduction piece to be still in the vertical direction, so that the angle between the magnetic conduction piece and the inductance coil is in the range of 45-135 degrees, the projection area of the magnetic conduction piece perpendicular to the surface of the inductance coil can be reduced, the magnetic gathering capacity of the magnetic conduction piece on the inductance coil is weakened, the inductance of the inductance coil can be smaller, and whether the pot cover is uncovered or not can be judged according to the inductance change of the inductance coil before and after the pot cover is uncovered.

In the above technical scheme, preferably, the pot cover includes a face cover and an inner cover, the face cover or the inner cover is provided with a mounting groove, the inductance coil is vertically inserted into the mounting groove, the upper portion of the magnetic conduction member is provided with a rotating shaft, and the face cover or the inner cover is provided with a rotating shaft hole matched with the rotating shaft.

The inductance coil is vertically inserted into the mounting groove formed in the surface cover or the inner cover, so that the firmness of the fixation of the inductance coil on the surface cover or the inner cover is ensured, and the inductance coil can also be vertically inserted into other parts and components, wherein the inductance coil is a part of a closed circuit; preferably, the upper part of the magnetic conduction piece is provided with a rotating shaft extending towards the opposite sides, and the surface cover or the inner cover is provided with a rotating shaft hole corresponding to the rotating shaft, so that the magnetic conduction piece is supported and suspended on the surface cover or the inner cover, the rotating shaft of the magnetic conduction piece can rotate in the rotating shaft hole, and the magnetic conduction piece is ensured to be in a vertical state all the time; of course, the rotating shaft can be arranged on the surface cover or the inner cover, and the rotating shaft hole corresponding to the rotating shaft is arranged on the magnetic conduction piece, so that the aim of the invention can be achieved without departing from the design concept of the invention.

In the above technical solution, preferably, the inductance coil is horizontally installed on the lid, the magnetic conducting member is a sheet member and vertically disposed at the bottom or the top of the inductance coil, and the magnetic conducting member is perpendicular to the inductance coil when the lid is in a closed state.

The induction coil is horizontally arranged on the pot cover, the magnetic conduction piece is vertically arranged at the bottom or the top of the induction coil, when the pot cover is in a cover closing state (namely, a horizontal position), the magnetic conduction piece is perpendicular to the induction coil, the projection area of the magnetic conduction piece perpendicular to the surface of the induction coil is small at the moment, the magnetic energy accumulation force of the magnetic conduction piece is poor, the number of magnetic induction lines of the induction coil passing through the magnetic conduction piece is small, and the inductance of the induction coil is small.

In the above technical solution, preferably, the upper portion of the magnetic conducting member is rotatably mounted on the lid, and when the lid is opened to an open state forming an angle of 45 ° to 135 ° with the horizontal direction, the angle between the magnetic conducting member and the inductance coil is within a range of 0 ° to 45 °.

Before and after the cover of the product is opened, the magnetic conduction piece can rotate around the hinge structure on the upper part of the magnetic conduction piece, so that the projection area of the magnetic conduction piece, which is vertical to the surface of the inductance coil, can be changed before and after the cover is opened, and when the pot cover is in a horizontal position (namely, a cover closing state), the projection area of the magnetic conduction piece, which is vertical to the surface of the inductance coil, is smaller because the magnetic conduction piece is vertical to the inductance coil, so that the magnetic conduction piece can gather the number of magnetic induction lines of the inductance coil, and the inductance value of the inductance coil is; after the pot cover is uncovered, the pot cover is opened to form an angle of 45-135 degrees with the horizontal direction, the inductance coil is turned over to form an angle of 45-135 degrees with the horizontal direction, the magnetic conduction piece can rotate around the hinge structure at the top of the magnetic conduction piece under the influence of gravity to enable the magnetic conduction piece to be still in the vertical direction, so that the included angle between the magnetic conduction piece and the inductance coil is in the range of 0-45 degrees, the projection area of the magnetic conduction piece on the surface of the inductance coil perpendicular to the projection area can be enlarged, the magnetic gathering capacity of the magnetic conduction piece on the inductance coil is enhanced at the moment, the inductance of the inductance coil is larger, and then whether the pot cover is uncovered can be judged according to the inductance change of the inductance coil before and after the.

In the above technical scheme, preferably, the pot cover with the pot body passes through the articulated shaft and articulates the connection, magnetic conduction spare is installed through the pivot rotation on the pot cover, the pivot is on a parallel with the articulated shaft setting.

The angle between the magnetic conduction piece and the inductance coil is enabled to change synchronously along with the change of the angle of the opening and closing cover by the design, so that the included angle between the magnetic conduction piece and the inductance coil is enabled to have larger variable quantity in the opening and closing cover process, the magnetic gathering capacity of the magnetic conduction piece to the inductance coil is enabled to change greatly, the change of the inductance coil is larger, and whether the pot cover is uncovered or not can be judged according to the change of the inductance coil before and after the pot cover is uncovered.

In any one of the above technical solutions, preferably, the electric pressure cooker further includes: the control circuit is used for controlling the heating function of the electric pressure cooker; and the control device is electrically connected with the inductance coil and used for judging whether the pot cover is opened or not according to the inductance change of the inductance coil and controlling the control circuit to be in an electrified state when the pot cover is judged to be opened.

In the above technical solution, preferably, the electric pressure cooker further includes: the screwing in-place detection switch is used for detecting whether the pot cover is screwed in place or not and controlling the on-off of the control circuit together with the control device; when the screwing in-place detection switch detects that the pot cover is screwed in place, the control circuit is controlled to be in a power-on state; when the control device judges that the pan cover is opened, the control circuit is controlled to be in a power-on state; and when the screwing in-place detection switch detects that the pot cover is not screwed in place and the control device judges that the pot cover is not opened, the control circuit is controlled to be in a power-off state.

Specifically, controlling means can be including connecting the control switch in control circuit, close the detection switch that targets in place soon and can connect in control circuit, and with control switch and close the detection switch that targets in place soon and connect in control circuit, control circuit is the on-state when control switch and close at least one closure in the detection switch that targets in place soon, control circuit is the off-state when control switch and close the detection switch that targets in place soon and all break off, thereby realize that the pot cover lid closes but can not heat when not closing in place soon, guarantee the security of product use, can heat when realizing the pot cover to open simultaneously, guarantee the convenience that the function of uncapping was realized.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is an exploded view of a partial structure of an electric pressure cooker according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is a schematic structural view of a cover of the electric pressure cooker according to an embodiment of the present invention in a closed state;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is an enlarged schematic view of the portion C of FIG. 4;

FIG. 6 is a schematic cross-sectional view taken along line D-D of FIG. 5;

FIG. 7 is a schematic structural view of the electric pressure cooker shown in FIG. 3 with the lid opened;

FIG. 8 is a schematic cross-sectional view taken along line E-E of FIG. 7;

FIG. 9 is an enlarged schematic view of portion F of FIG. 8;

fig. 10 is a sectional view in the direction of G-G in fig. 9.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

1 inner cup, 11 mounting grooves, 12 pivot holes, 13 articulated shafts, 2 inductance coils, 21 wires, 3 magnetic conduction pieces and 31 pivots.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

An electric pressure cooker according to some embodiments of the present invention will be described with reference to fig. 1 to 10.

As shown in fig. 1 to 10, according to some embodiments of the present invention, there is provided an electric pressure cooker, including: a pot body and a pot cover.

Specifically, as shown in fig. 1 and 2, the pot cover is hinged to the pot body, the induction coil 2 and the magnetic conduction member 3 adjacent to the induction coil 2 are arranged on the pot cover, the magnetic conduction member 3 is rotatably installed on the pot cover and is always in a vertical state under the action of gravity of the pot cover, when the pot cover is switched between a cover closing state and a cover opening state, the projection area of the magnetic conduction member 3 perpendicular to the surface of the induction coil 2 is changed, so that the inductance of the induction coil 2 is changed, and whether the pot cover is opened or not is judged according to the inductance change of the induction coil 2.

The electric pressure cooker provided by the above embodiment of the invention is characterized in that the cover is provided with the inductance coil 2 and the magnetic conductive member 3 (such as an iron sheet), the inductance coil 2 is fixed on the cover and is connected to the circuit through the lead 21, the inductance coil is a part of the closed circuit, the magnetic conductive member 3 is rotatably installed on the cover and is always in a vertical state under the action of self gravity, thus when the cover is switched to an open-close state, the magnetic conductive member 3 is always in a vertical state under the action of gravity, the inductance coil 2 can turn over a certain angle along with the cover, the projected area of the magnetic conductive member 3 perpendicular to the surface of the inductance coil 2 changes before and after the cover is uncovered, the inductance of the inductance coil 2 before and after the magnetic conduction of the magnetic conductive member 3 is gathered, and the difference of the inductance coil 2 before and after the magnetic conduction of the magnetic conductive member 3 is gathered can be used for judging whether the cover is uncovered, furthermore, through the control of a program circuit and a program, the screwing in-place detection switch on the pot cover can realize that the product can be normally heated even if the pot cover is detected to be in an un-screwing in-place state; by adopting the scheme of the invention, after the pot cover is uncovered, the product can be normally heated without rotating the pot cover, namely, the pot cover is directly opened for boiling without rotating the pot cover like the existing scheme so that the pot cover is in a screwing state; after the completion was uncapped and is boiled, above-mentioned scheme also need not to make the pot cover be in and close the lid state that targets in place like current scheme need again, so the operating procedure of product has both been simplified to above-mentioned scheme, also thoroughly avoided the product to accomplish uncap and boiled the back, forget to open the lid state with the pot cover directly down press the pot tooth that the pot cover leads to on the pot cover to collide with on the pot tooth of outer pot when the user, lead to both by the risk that the flower is bumped or pot cover pot tooth warp, thereby the experience effect of product has been promoted.

In an embodiment of the present invention, as shown in fig. 3 to 6, the inductance coil 2 is vertically installed on the lid, the magnetic conduction member 3 is a sheet-shaped member and is vertically installed at one side of the inductance coil 2, and the magnetic conduction member 3 is parallel to the inductance coil 2 when the lid is in the closed state.

Above-mentioned design is realized locating the pot cover side by side with magnetic conduction piece 3 and inductance coils 2, make inductance coils 2 and magnetic conduction piece 3 arrangement structure on the pot cover more simplified, and realize that the pot cover is in when closing the lid state (horizontal position promptly), magnetic conduction piece 3 is parallel with inductance coils 2, magnetic conduction piece 3 is great at the projection area on 2 surfaces of perpendicular to inductance coils this moment, the magnetic energy power of magnetic conduction piece 3 is stronger, inductance coils 2's magnetism is felt the line and is passed through the quantity of magnetic conduction piece 3 more, inductance coils 2's inductance is great.

Preferably, as shown in fig. 4 and 5, when the lid is in the closed state, the distance between the magnetizer 3 and the inductor 2 is less than 30 mm.

Because the magnetic conductive member 3 can gather the magnetic induction lines of the inductance coil 2, when the distance between the magnetic conductive member 3 with a fixed thickness and the inductance coil 2 in the closed circuit is close enough, the larger the projection area of the magnetic conductive member 3 perpendicular to the surface of the inductance coil 2 is, the stronger the magnetic gathering capability of the magnetic conductive member 3 is, the more the magnetic induction lines of the inductance coil 2 pass through the magnetic conductive member 3, and the larger the inductance of the inductance coil 2 is at this time; when the designed pot cover is in a closed state, the distance between the magnetic conduction piece 3 and the inductance coil 2 is smaller than 30mm, so that the inductance difference of the inductance coil 2 before and after the pot cover is uncovered is obvious, and the accuracy of judging whether the pot cover is uncovered according to the inductance change of the inductance coil 2 before and after the pot cover is uncovered is improved.

Further, as shown in fig. 7 to 10, the upper part of the magnetic conducting member 3 is rotatably mounted on the lid, and when the lid is opened to an uncapped state forming an angle of 45 ° to 135 ° with the horizontal direction, the angle between the magnetic conducting member 3 and the inductance coil 2 is within a range of 45 ° to 135 °.

Before and after the cover of the product is opened, the magnetic conduction member 3 can rotate around the hinge structure at the upper part of the magnetic conduction member 3, so that the projection area of the magnetic conduction member 3 vertical to the surface of the inductance coil 2 can be changed before and after the cover is opened, when the pot cover is in a horizontal position (namely, a cover closing state), the projection area of the magnetic conduction member 3 vertical to the surface of the inductance coil 2 is larger because the magnetic conduction member 3 is parallel to the inductance coil 2, so that the magnetic conduction member 3 can gather more magnetic induction lines of the inductance coil 2, and the inductance of the inductance coil 2 is larger at the moment; after the pot cover is uncovered, the pot cover is opened to form an angle of 45-135 degrees with the horizontal direction, at the moment, the inductance coil 2 is turned over to form an angle of 135-225 degrees with the horizontal direction, the magnetic conduction piece 3 can rotate around the hinge structure at the top of the magnetic conduction piece 3 under the influence of gravity to enable the magnetic conduction piece to be still in the vertical direction, at the moment, the angle between the magnetic conduction piece 3 and the inductance coil 2 is in the range of 45-135 degrees, the projection area of the magnetic conduction piece 3 perpendicular to the surface of the inductance coil 2 can be reduced, at the moment, the magnetic gathering capacity of the magnetic conduction piece 3 on the inductance coil 2 is weakened, the inductance value of the inductance coil 2 can be smaller, and whether the pot cover is uncovered can be judged according to the inductance value change of the inductance coil 2.

In a specific embodiment, as shown in fig. 5, 9 and 10, the pot cover includes a surface cover and an inner cover 1, the inner cover 1 (or the surface cover) is provided with a mounting groove 11, and the inductance coil 2 is vertically inserted into the mounting groove 11; as shown in fig. 6 and 10, the upper portion of the magnetic conducting member 3 is provided with a rotating shaft 31, and the inner cover 1 (or the surface cover) is provided with a rotating shaft hole 12 matched with the rotating shaft 31; preferably, the top of inner cup 1 is equipped with mounting groove 11, and inductance coils 2 vertical cartridge is in mounting groove 11.

The inductance coil 2 is vertically inserted into the mounting groove 11 arranged on the surface cover or the inner cover 1, so that the firmness of the fixation of the inductance coil 2 on the surface cover or the inner cover 1 is ensured, of course, the inductance coil 2 can also be vertically inserted onto other parts, and the inductance coil 2 is a part of a closed circuit; preferably, the upper part of the magnetic conducting member 3 is provided with a rotating shaft 31 extending back to back on both sides, and the surface cover or the inner cover 1 is provided with a rotating shaft hole 12 corresponding to the rotating shaft 31, so that the magnetic conducting member 3 is supported and suspended on the surface cover or the inner cover 1, the rotating shaft 31 of the magnetic conducting member 3 can rotate in the rotating shaft hole 12, and the magnetic conducting member 3 is ensured to be in a vertical state all the time; of course, the rotating shaft 31 may be disposed on the surface cover or the inner cover 1, and the rotating shaft hole 12 corresponding to the rotating shaft 31 may be disposed on the magnetic conductive member 3, which also can achieve the purpose of the present invention without departing from the design concept of the present invention.

In another embodiment of the present invention, the inductance coil 2 is horizontally installed on the lid, the magnetic conducting member 3 is a sheet-shaped member and is vertically installed at the bottom (or top) of the inductance coil 2, and the magnetic conducting member 3 is perpendicular to the inductance coil 2 when the lid is in the closed state.

With inductance coils 2 horizontal installation on the pot cover, with the vertical bottom or the top of locating inductance coils 2 of magnetic conduction piece 3, when realizing that the pot cover is in the state of closing the lid (horizontal position promptly), magnetic conduction piece 3 is perpendicular with inductance coils 2, and the magnetic conduction piece 3 is less at the projection area on the surface of perpendicular to inductance coils 2 this moment, and magnetic energy collection power of magnetic conduction piece 3 is relatively poor, and inductance coils 2's magnetic induction line passes through the quantity of magnetic conduction piece 3 less, and inductance coils 2's inductance is less.

Further, the upper part of the magnetic conduction member 3 is rotatably installed on the pot cover, and when the pot cover is opened to an uncovering state forming an angle of 45-135 degrees with the horizontal direction, the angle between the magnetic conduction member 3 and the inductance coil 2 is in the range of 0-45 degrees.

Before and after the cover of the product is opened, the magnetic conduction member 3 can rotate around the hinge structure on the upper part of the magnetic conduction member 3, so that the projection area of the magnetic conduction member 3 vertical to the surface of the inductance coil 2 can be changed before and after the cover is opened, and when the pot cover is in a horizontal position (namely, a cover closing state), the projection area of the magnetic conduction member 3 vertical to the surface of the inductance coil 2 is smaller because the magnetic conduction member 3 is vertical to the inductance coil 2, so that the magnetic conduction member 3 can gather the number of magnetic induction lines of the inductance coil 2, and at the moment, the inductance value of the inductance coil 2 can be smaller; after the pot cover is uncovered, the pot cover is opened to form an angle of 45-135 degrees with the horizontal direction, at the moment, the inductance coil 2 is turned over to form an angle of 45-135 degrees with the horizontal direction, the magnetic conduction piece 3 can rotate around the hinge structure at the top of the magnetic conduction piece 3 due to the influence of gravity to enable the magnetic conduction piece to be still in the vertical direction, at the moment, the included angle between the magnetic conduction piece 3 and the inductance coil 2 is in the range of 0-45 degrees, the projection area of the magnetic conduction piece 3 perpendicular to the surface of the inductance coil 2 can be enlarged, the magnetism gathering capacity of the magnetic conduction piece 3 for the inductance coil 2 is enhanced at the moment, the inductance value of the inductance coil 2 can be larger, and whether the pot cover is uncovered can be judged according to the inductance value change of the inductance coil.

Preferably, as shown in fig. 3 and 7, the pot cover and the pot body are hinged by a hinge shaft 13, the magnetic conduction member 3 is rotatably mounted on the pot cover by a rotating shaft 31, and the rotating shaft 31 is arranged parallel to the hinge shaft 13.

The angle between the magnetic conduction piece 3 and the inductance coil 2 is synchronously changed along with the change of the angle of the opening and closing cover by the design, so that the included angle between the magnetic conduction piece 3 and the inductance coil 2 in the opening and closing cover process is ensured to have larger variable quantity, the change of the magnetic gathering capacity of the magnetic conduction piece 3 to the inductance coil 2 is larger, the change of the inductance coil 2 is larger, and whether the pot cover is uncovered or not can be judged according to the change of the inductance coil 2 before and after the pot cover is uncovered.

In some embodiments of the invention, the electric pressure cooker further comprises: the control circuit is used for controlling the heating function of the electric pressure cooker; and the control device is electrically connected with the inductance coil 2 and used for judging whether the pot cover is opened or not according to the inductance change of the inductance coil 2 and controlling the control circuit to be in an electrified state when the pot cover is judged to be opened.

Further, the electric pressure cooker further comprises: the screwing in-place detection switch is used for detecting whether the pot cover is screwed in place or not and controlling the on-off of the control circuit together with the control device; when the screwing-in-place detection switch detects that the pot cover is screwed in place, the control circuit is controlled to be in a power-on state; when the control device judges that the pan cover is opened, the control circuit is controlled to be in a power-on state; when the screwing in-place detection switch detects that the pot cover is not screwed in place and the control device judges that the pot cover is not opened, the control circuit is in a power-off state.

In a specific embodiment, as shown in fig. 1 and fig. 2, an inductance coil 2 and a magnetic conductive member 3 (such as an iron sheet, but may also be an aluminum sheet or other magnetic conductive material) are designed on the top of the pot cover, the inductance coil 2 is vertically inserted into the inductance coil 2 mounting groove 11 of the inner cover 1, the inductance coil 2 is a part of a closed circuit, wherein the inductance coil 2 may also be vertically inserted onto the face cover or other parts; a magnetic conducting piece 3 (such as an iron sheet) is arranged at a position close to the inductance coil 2, the magnetic conducting piece 3 is fixed on the inner cover 1 through a hinge structure at the top of the magnetic conducting piece 3, and the magnetic conducting piece 3 can rotate around the hinge structure; as shown in fig. 3 to 6, when the pot cover is in a horizontal position (i.e., a closed state), the magnetic conducting member 3 is in a vertical state, that is, the magnetic conducting member 3 is parallel to the inductor 2 at this time, and the distance between the inductor 2 and the magnetic conducting member 3 is smaller than 30mm at this time; as shown in fig. 7 to 10, when the product is subjected to cover opening and boiling, that is, the lid is in a uncovered state, the magnetic conducting member 3 is influenced by gravity, the magnetic conducting member 3 rotates around the hinge structure at the top of the magnetic conducting member 3, so the magnetic conducting member 3 is always in the vertical direction, and in addition, because the uncovering angle of the lid is 45 ° to 135 ° with respect to the horizontal direction, the included angle between the magnetic conducting member 3 and the inductance coil 2 is α, wherein 45 ° < α <135 °, so before and after the lid is uncovered, the projection area of the magnetic conducting member 3 perpendicular to the inductance coil 2 changes, since the magnetic conducting member 3 can collect the magnetic induction lines of the inductance coil 2, the inductance values of the inductance coil 2 before and after the magnetic conduction of the magnetic conducting member 3 is collected can be different, and thus by the difference of the inductance values of the inductance coil 2 before and after the lid is uncovered, it can be determined whether the lid is uncovered.

Specifically, because the magnetic conductive member 3 can gather the magnetic induction lines of the inductance coil 2, when the distance between the magnetic conductive member 3 with a fixed thickness (the specific thickness of the magnetic conductive member 3 can be reasonably designed according to actual conditions) and the inductance coil 2 in the closed circuit is close enough, the larger the projection area of the magnetic conductive member 3 perpendicular to the inductance coil 2 is, the stronger the magnetic gathering capability of the magnetic conductive member 3 is, the more the number of the magnetic induction lines of the inductance coil 2 passing through the magnetic conductive member 3 is, and the larger the inductance of the inductance coil 2 is at this time; specifically, before and after the product is opened, the magnetic conduction member 3 rotates around the hinge structure at the top of the magnetic conduction member 3, so that the projection area of the magnetic conduction member 3 perpendicular to the surface of the inductance coil 2 changes before and after the product is opened, as shown in fig. 3 to 6, when the pot cover is in a horizontal position (i.e., a closed state), because the magnetic conduction member 3 is parallel to the inductance coil 2, the projection area of the magnetic conduction member 3 perpendicular to the inductance coil 2 is larger, so that the magnetic conduction member 3 can gather more magnetic induction lines of the inductance coil 2, and at this time, the inductance of the inductance coil 2 is larger; as shown in fig. 7 to 10, when the lid is opened (i.e., in the lid-opened state), the magnetic conducting member 3 rotates around the hinge structure at the top of the magnetic conducting member 3 under the influence of gravity to keep the lid in the vertical direction, so that the projection area of the magnetic conducting member 3 perpendicular to the surface of the inductor coil 2 is reduced, the magnetic gathering capability of the magnetic conducting member 3 on the inductor coil 2 is reduced, the inductance of the inductor coil 2 is reduced, and it can be determined whether the lid is opened or not by the difference between the inductances of the inductor coil 2 before and after the lid is opened.

In addition, in order to avoid safety accidents, a detection switch for detecting whether the pot cover is screwed in place is designed on the product, when the pot cover is in a horizontal state, the product can be heated when the pot cover is screwed in place, and when the pot cover is not screwed in place or not, the product cannot be heated; after the pot cover is uncovered, because whether the pot cover is uncovered can be detected in the scheme, after the new scheme is adopted, even if the in-place screwing detection switch on the pot cover detects that the pot cover is not in the in-place screwing state, the product can be normally heated under the condition through the program circuit and program control, namely after the new scheme is adopted, the product does not need to rotate the pot cover after the pot cover is uncovered, the product can be normally heated, namely the pot cover is opened and boiled, and therefore the pot cover is not needed to be rotated like the old product scheme to be in the in-place screwing state; after the cover is opened and the cooker is cooked, the cooker cover is not required to be rotated again like the old product scheme so that the cooker cover is in a cover closing in-place state, the operation steps of products are simplified, the problem that the cooker teeth on the cooker cover collide with the cooker teeth of an outer cooker due to the fact that a user forgets to rotate the cooker cover to the cover opening state and directly presses the cooker cover downwards after the products are opened and cooked is caused to be scratched or the cooker cover teeth deform is solved well.

Certainly, the inductance coil 2 may also be horizontally assembled on the top of the inner cover 1, the magnetic conducting member 3 (such as an iron sheet) is vertically assembled on the bottom (or top) of the inductance coil 2, when the pot cover is in the horizontal position, the magnetic conducting member 3 is perpendicular to the inductance coil 2, and when the pot cover is uncovered, the magnetic conducting member 3 is parallel to (or forms a certain included angle with) the inductance coil 2, which can also achieve the above-mentioned purpose of the present invention and is not described herein again.

In summary, according to the electric pressure cooker provided by the embodiment of the invention, the projection area of the magnetic conductive member perpendicular to the surface of the inductance coil is changed when the cover is switched between the cover closing state and the cover opening state, so that the inductance of the inductance coil is changed, and whether the cover is opened or not is judged according to the inductance change of the inductance coil, so that the cover opening and the cooking can be directly performed without rotating the cover, thereby simplifying the operation steps of the product, and avoiding the problem that the teeth of the cooker are scratched or even deformed due to forgetting to rotate the cover by a user.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "connected", "fixed", and the like are to be construed broadly, e.g., "connected" may be a fixed connection, a detachable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric pressure cooker, characterized in that, includes:

a pan body; and

the pot cover articulates on the pot body, be equipped with inductance coils and neighbouring on the pot cover the magnetic conduction spare that inductance coils set up, magnetic conduction spare rotates to be installed on the pot cover and be in vertical state all the time under self action of gravity, when the pot cover switches between closing the lid state and the state of uncapping, magnetic conduction spare is at the perpendicular to the projection area on inductance coils surface changes, makes inductance coils's inductance value changes, with the basis inductance coils's inductance value changes the judgement the pot cover is opened or not.

2. The electric pressure cooker according to claim 1,

the induction coil is vertically installed on the pot cover, the magnetic conduction piece is a sheet piece and is vertically arranged on one side of the induction coil, and the magnetic conduction piece is parallel to the induction coil when the pot cover is in a cover closing state.

3. The electric pressure cooker according to claim 2,

when the pot cover is in a closed state, the distance between the magnetic conduction piece and the inductance coil is less than 30 mm.

4. The electric pressure cooker according to claim 2,

the upper part of the magnetic conduction piece is rotatably arranged on the pot cover, and when the pot cover is opened to an uncovering state forming an angle of 45-135 degrees with the horizontal direction, the angle between the magnetic conduction piece and the inductance coil is in the range of 45-135 degrees.

5. The electric pressure cooker according to claim 2,

the pot cover is including face lid and inner cup, the face lid or cover in and be equipped with the mounting groove, the vertical cartridge of inductance coil is in the mounting groove, the upper portion of magnetic conduction spare is equipped with the pivot, the face lid or cover in and be equipped with pivot matched with pivot hole.

6. The electric pressure cooker according to claim 1,

the induction coil is horizontally arranged on the pot cover, the magnetic conduction piece is a sheet piece and is vertically arranged at the bottom or the top of the induction coil, and the magnetic conduction piece is perpendicular to the induction coil when the pot cover is in a closed state.

7. The electric pressure cooker according to claim 6,

the upper part of the magnetic conduction piece is rotatably arranged on the pot cover, and when the pot cover is opened to a state of opening the cover, wherein an angle of 45-135 degrees is formed between the pot cover and the horizontal direction, the angle between the magnetic conduction piece and the inductance coil is in the range of 0-45 degrees.

8. The electric pressure cooker according to claim 1,

the pot cover with the pot body is through articulated connection of articulated shaft, magnetic conduction spare is installed through the pivot rotation on the pot cover, the pivot is on a parallel with the articulated shaft setting.

9. The electric pressure cooker according to any one of claims 1 to 8, further comprising:

the control circuit is used for controlling the heating function of the electric pressure cooker; and

and the control device is electrically connected with the inductance coil and used for judging whether the pot cover is opened or not according to the inductance change of the inductance coil and controlling the control circuit to be in an electrified state when the pot cover is judged to be opened.

10. The electric pressure cooker of claim 9, further comprising:

the screwing in-place detection switch is used for detecting whether the pot cover is screwed in place or not and controlling the on-off of the control circuit together with the control device;

when the screwing in-place detection switch detects that the pot cover is screwed in place, the control circuit is controlled to be in a power-on state;

when the control device judges that the pan cover is opened, the control circuit is controlled to be in a power-on state;

and when the screwing in-place detection switch detects that the pot cover is not screwed in place and the control device judges that the pot cover is not opened, the control circuit is controlled to be in a power-off state.