CN100425186C - Electric pressure cooker - Google Patents

Abstract

The present invention discloses an electric pressure cooker which comprises a cooker body and a cooker cover, wherein a control circuit is arranged in the cooker body; the cooker cover is provided with a pressure transmission gear and an elastic seal sleeve; the elastic seal sleeve is fixed and sealed on the hole wall of the hole of the cooker cover; the pressure transmission gear comprises a lining, a piston and a rotating member; the lining is embedded in the elastic seal sleeve; the piston capable of axially sliding is arranged in the lining; the rotating member is connected with the piston capable of driving the rotating member to radially rotate in a transmission way; the top of the rotating member is fixedly connected with a rotating long arm; the end of the rotating long arm is fixedly connected with a sensing device; the upper edge of the cooker body is provided with a sensor at the position corresponding to the sensing device; the sensor is electrically connected with the control circuit. The present invention has the characteristics of multistage press control, safety, reliability and high control accuracy and is widely used for various electric pressure cookers.

Description

an electric pressure cooker

technical field

The invention relates to an electric pressure cooker, in particular to an electric pressure cooker with automatic pressure control.

Background technique

As a kind of electric cooking utensil, the electric pressure cooker works under high pressure. In order to ensure the safety of the electric pressure cooker, the pressure in the electric pressure cooker must be controlled so that the pressure in the electric pressure cooker does not exceed a certain set value or rated value.

The internal pressure control method of the traditional electric pressure cooker, such as the Chinese invention patent named "Fully Sealed Automatic Multifunctional Electric Cooker" and the application number 91100026.7, mainly adopts the rigid structure of "mouth". value, the inner pot of the electric pressure cooker expands and deforms under high pressure, and is forced to move down. This deformation can drive the deformation of the elastic part at the bottom of the inner pot, and the deformed elastic part drives the pressure control device, such as micro switch, control Pressure control devices such as temperature control and pressure components force the pressure control device to act, cut off the main power supply, and complete the function of pressure control. The main disadvantages of this technology are: the inner pot and the elastic parts at the bottom of the inner pot are compressed and swelled and deformed frequently, and move up and down, which easily leads to the deformation of the inner pot and the elastic parts at the bottom, and the service life is short.

Another pressure control method in the prior art is to achieve the function of pressure control by arranging a pressure control device on the pot cover. For example, the Chinese patent whose application number is 200520056869.4 and titled "An Automatic Electric Pressure Cooker", as shown in Fig. The main feature is that a sealed pressure valve 12, a seesaw lever mechanism 13 and an induction device 14 are arranged on the pot cover, and a dry reed switch 15 is arranged on the position of the pot body corresponding to the induction device. When the pressure of the inner pot changes, the sealed pressure valve 12 pushes the seesaw lever mechanism 13 and drives the induction device 14 to move up and down, so that the reed switch 15 is turned on or off, and then the reed switch 15 is used to control the operation of the electric heating plate. So as to achieve the purpose of pressure control.

The disadvantage of this control method is that the mechanical amplification factor of the seesaw lever mechanism is not stable enough, so that the displacement variation of the sealed pressure valve 12, that is, the parameter reflecting the pressure in the pot, cannot be stably and accurately transmitted to the induction device 14 , resulting in a large control error.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention proposes an electric pressure cooker capable of multi-stage pressure control, safe and reliable, and high in control accuracy.

In order to achieve the above object, the present invention has taken the following technical solutions:

An electric pressure cooker, comprising a pot body 1 and a pot cover 2; a control circuit 3 is arranged in the pot body 1, a pressure transmission device 4 and an elastic sealing sleeve 5 are arranged on the described pot cover 2; the elastic sealing sleeve 5 is fixed and sealed On the hole wall of the first hole 21 of the pot cover 2;

The pressure transmission device 4 mainly includes a bushing 41, a piston 42 and a rotating member 43; the bushing 41 is embedded in the elastic sealing sleeve 5; a piston 42 that can slide axially is embedded in the bushing 41; the rotating member 43 is connected with the piston 42 that can drive its radial rotation, and the rotating member 43 is rotatably connected with the pot cover 2 through the fixed plate 8; the top of the rotating member 43 is fixedly connected with the rotating long arm 6a, and the An induction device 61 is fixedly connected to the end of the long rotating arm 6 a ; a sensor 7 is provided on the upper edge of the pot body 1 corresponding to the induction device 61 , and the sensor 7 is electrically connected to the control circuit 3 .

The above-mentioned pot body 1 is one of the main components of the electric pressure cooker, and it usually includes general components such as an outer shell, a middle pot, an inner pot, an electric heating plate, a temperature control device and a control circuit 3 . Fasten the pot cover 2 on the pot body 1 and connect the power supply, the electric pressure cooker can work normally under the control of the control circuit 3 .

The above-mentioned pot cover 2 is also a general assembly of the electric pressure cooker, and its top is provided with a handle 23 for loading and unloading the pot cover 2 for people's daily operation. The handle 23 is a hollow structure, which can save material on the one hand, and on the other hand, control components such as the pressure transmission device 4 can also be placed in the hollow structure.

The inner edge of the pot cover 2 is provided with an elastic sealing ring to ensure good airtightness between the pot cover 2 of the electric pressure cooker and the inner pot of the pot body 1 after the pot cover 2 is covered on the pot body 1 . Secondly, the pot cover 2 is also provided with a manual mechanical air release valve, which is used to perform manual forced pressure relief on the inner pot before the pot cover 2 is lifted after the work of the electric pressure cooker is completed. Since the manual mechanical air release valve is the most common safety component at present, its structure will not be described in detail here.

The control circuit 3 is generally located between the middle pot and the shell of the pot body 1, and it receives an electric signal from the sensor 7, which is a parameter reflecting the internal pressure of the electric pressure cooker, and the electric signal is amplified and compared, Then control other elements of the electric pressure cooker, such as the on-off or heating power of the electric heating element, the time of the timer, etc., so as to control the working state of the electric pressure cooker.

The elastic sealing sleeve 5 is sealed and fixed on the pot cover 2 . A first hole 21 is set on the pot cover 2, and an elastic sealing sleeve 5 is installed in the first hole 21. The above-mentioned sealing sleeve 5 is a softer elastic rubber member, which can be in the shape of a barrel, a square barrel, etc., the bottom is closed and extends into the inner space of the pot cover 2, and the upper opening can accommodate the transmission device 4 . There are many ways for the elastic sealing sleeve 5 to be hermetically fixed on the pot cover 2, for example, a lip edge 5a is provided at its upper opening, and the lip of the lip edge 5a is embedded in the hole wall where the first hole 21 is located, thereby realizing sealing ; You can also take methods such as bonding, gland gland and sleeve fixing.

The pressure transmission device 4 is arranged on the pot cover 2, preferably in the lower chamber of the handle 23, so that the transmission device 4 can be protected. The pressure transmission device 4 includes a bushing 41 , a piston 42 and a displacement converter 43 . The structure of the pressure transmission device 4 is as follows:

(1) The bushing 41 is embedded in the elastic sealing sleeve 5 .

The bushing 41 is a cylindrical body adapted to the shape and size of the elastic sealing sleeve 5, and is open up and down. The sleeve body 41b of the bushing 41 is embedded and fixed in the elastic sealing sleeve 5, so that the bushing 41 can The extrusion action of the elastic sealing sleeve 5 makes the lip edge 5a of the elastic sealing sleeve 5 form a reliable seal with the hole wall surface of the first hole 21 of the pot cover 2 . The length of the sleeve body 41b is less than the depth of the elastic sealing sleeve 5, so that a certain telescopic displacement distance can be reserved for the bottom of the elastic sealing sleeve 5;

Secondly, on the upper part of the bushing 41, a lip edge 41a is set, and the lip edge 41a is pressed on the lip edge 5a of the elastic sealing sleeve 5, so that the sealing effect of the sealing sleeve 5 can be enhanced, and the sealing effect during use can be avoided. During the process, the bushing 41 completely falls into the bottom of the sealing sleeve 5 due to external force.

(2) The piston 42 is placed in the bush 41, and can slide axially in the bush 41, but cannot rotate radially.

There are many specific methods to realize that the piston 42 slides axially in the bush 41 but does not rotate radially. For example, if the bush 41 and the piston 42 are non-circular shapes such as square or ellipse, the two are installed together There is no possibility of radial rotation after itself.

Secondly, it is also possible to set ribs on the inner side wall of the bushing 41 in the axial direction, or on the upper part of the bushing 41, or on a pressure ring additionally provided on the upper part of the bushing 41, and on the outer wall of the piston 42 along the axial direction. Direction, correspondingly set grooves, the number and shape of the grooves are adapted to the convex ribs arranged on the inner wall of the bushing 41; the outer diameter of the piston 42 is slightly smaller than the inner diameter of the bushing 41, so that when the piston 42 is set into The bushing 41 enables the ribs in the bushing 41 to be smoothly inserted into the symmetrically arranged grooves on the side wall of the piston 42, and enables the piston 42 to slide flexibly and axially in the bushing 41 without radial rotation . The number of pairs of convex ribs and grooves is preferably two or more, and they are arranged symmetrically, so that the force can be evenly applied.

In addition, we can also change the ribs provided on the inner side wall of the bushing 41 into grooves. Correspondingly, setting the ribs on the piston 42 to match them are all equivalent application solutions, but such changes Scheme, although the purpose of the present invention can be achieved, it may make the sealing performance of the hole wall surface contact portion of the lip edge 5a of the sealing sleeve 5 and the first hole 21 of the pot cover 2 deteriorate.

(3) The rotating member 43 is connected with the transmission of the piston 42, and rotates radially under the driving of the piston 42; a steering mechanism is arranged between the piston 42 and the rotating member 43, and the steering mechanism can convert the linear motion of the piston 42 into rotation The rotational movement of member 43; The steering mechanism can be:

(A) At the upper center of the above-mentioned piston 42, a cylindrical hole 42b is set; more than one boss is set on the inner wall of the cylindrical hole 42b; the rotating member 43 is set in the piston 42.

The rotating part 43 is a cylinder adapted to the cylindrical hole 42b provided at the center of the upper part of the piston 42. The outer wall of the rotating part 43 is provided with oblique grooves, and the number, depth and width of the oblique grooves are adapted to the bosses. Install. The starting point of the oblique groove is set at the bottom of the rotating part 43, and the development diagram of the oblique groove is a diagonal line starting from the bottom of the rotating part 43, or a combination of a diagonal line and a straight line, and the angle between the oblique line and the bottom edge is rotated as required Factors such as the stroke of rotation of part 43 and the strength of force determine the setting, preferably about 45 degrees. The outer diameter of the rotary member 43 is slightly smaller than the inner diameter of the cylindrical hole 42 b of the piston 42 . Like this, when rotating member 43 was packed in the cylindrical hole 42b of piston 42, the boss in the cylindrical hole 42b can be inserted in the oblique groove that the outer wall surface of rotating member 43 is provided with smoothly, thereby makes boss along When the oblique groove slides, the rotating member 43 is driven to rotate, so that linear motion is converted into rotary motion. The boss can be not only a small protruding cylinder, but also a section of protruding spiral ribs. The way the boss and the oblique groove cooperate with each other is similar to the way of thread transmission, but the pitch is much larger than the ordinary thread we see every day.

(B) The above-mentioned steering mechanism that realizes the conversion of linear motion into rotary motion can also be that a boss 43b is set on the outer wall of the rotating member 43, and an oblique groove 42c is set in the cylindrical blind hole 42b of the piston 42, and matched Using it can also realize the transformation of linear motion into rotary motion, all of which are equivalent application solutions.

(C) The above-mentioned steering mechanism that realizes the transformation of linear motion into rotary motion can also be that a protruding column 42d is provided on the circumferential direction of the top edge of the piston 42; a slope 43d is provided on the lower edge of the rotating member 43; A spring 40 is arranged between the member 43 and the piston 42 . The outer diameter of the rotating member 43 is basically consistent with the outer diameter of the piston 42; on the top edge of the piston 42, more than one protruding post 42d is arranged; The inclined surface 43d, so that when the protruding column 42d of the piston 42 moves linearly up and down, the protruding column 42d pushes the inclined surface 43d at the lower part of the rotating member 43 to slide, thereby realizing the driving of the rotating member 43 to rotate. This transmission mode is similar to toothed transmission.

(D) the above-mentioned steering mechanism that realizes that linear motion is converted into rotary motion can also be that the outer diameter of the rotating member 43 is basically consistent with the outer diameter of the piston 42; Protruding columns are arranged on the lower edge. Therefore, when the piston 42 moves linearly up and down in a saw-toothed slope, the protruding post of the rotating member 43 is pushed to slide, thereby driving the rotating member 43 to rotate.

There are various schemes for realizing the steering mechanism. The structure of the steering mechanism described above is only an enumerative way of describing and realizing, and does not mean that the steering mechanism of the present invention is limited to these structures.

A cylindrical hole 43 a may also be provided at the center of the lower part of the rotating member 43 ; a spring 40 is arranged in the cylindrical hole 43 a of the rotating member 43 . The length of the spring 40 is greater than the depth of the cylindrical hole 43a of the rotating member 43 .

In this way, when assembling, the spring 40 is first inserted into the cylindrical hole 43a of the rotating member 43, and then the rotating member 43 is set on the piston 42; due to the tension of the spring 40, the bottom of the rotating member 43 and the piston 42 There is a certain distance between them. Secondly, the fixed piece 8 is a flat plate gasket with a central hole or a central groove, through the top wall of the handle 23 and the fixed piece 8, the top 43c of the rotating member 43 is rotatably fixed in the handle 23, The rotating member 43 cannot move axially but can rotate, that is, the rotating member 43 is rotatably connected with the pot cover 2 through the fixed piece 8 . If the top 43c of the rotating member 43 is directly connected to the top wall of the handle 23, the fixing piece 8 can be omitted and not used.

When the external pressing force moves the piston 42, it not only drives the rotating member 43 to rotate, but also continuously compresses the spring 40; when the pressing force is lost, the tension of the spring 40 causes the piston 42 and the rotating member 43 to return to their original positions .

The center of the lower part of the above-mentioned rotating member 43 may not be provided with a cylindrical hole 43a, so that the spring 40 is directly placed between the cylindrical hole 42b of the piston 42 and the rotating member 43, which is one of the equivalent application solutions.

Secondly, in order to make the rotating member 43 rotate, the spring 40 will not form a large resistance to the rotational movement, balls are arranged at one or both ends of the spring 40, and grease is applied to the balls.

Described fixed piece 8 can also be a " door " shape or " 匚 " shape frame, and the bottom of " door " shape or " 匚 " shape frame is fixed on the pot cover 2 . There is a central hole or a central groove on the fixed piece 8, and the top 43c of the rotating member 43 penetrates into the central hole or the central groove of the fixed piece 8 and can rotate, but cannot move axially, so that the rotating member 43 is firmly fixed on the pot cover 2 On the inside of the handle 23, the entire pressure transmission device 4 is independently fixed without the top wall of the handle 23, which facilitates the independent assembly of the pressure transmission device 4.

The top 43c of the rotating member 43 is fixedly connected to the rotating arm 6 . The rotating arm 6 includes a long rotating arm 6a and a short rotating arm 6b. The rotating arm 6 extends along the inside of the top wall of the handle 23 towards the edge of the pot cover 2 to form a rotating long arm 6a, and a rotating short arm 6b is arranged in the opposite direction at the rear of the rotating long arm 6a. The end of the rotating long arm 6a is fixedly connected with the induction device 61 .

Secondly, at the position corresponding to the induction device 61 on the upper edge of the pot body 1, preferably the sensor 7 is set at the closing position of the handle 23 of the pot cover 2. The sensor 7 is electrically connected to the control circuit 3 .

In order to implement multi-pressure point control on the inner pot pressure of the electric pressure cooker, a plurality of sensors 7 are arranged within the swing range of the rotating arm 6 . All the sensors 7 are electrically connected to the control circuit 3 . The sensor 7 can receive a signal from the sensing device 61, and then convert the sensing signal into an electrical signal and send it to the control circuit 3 for corresponding processing.

The aforementioned inductive device 61 is a device that affects the signal of the sensor 7 so that the sensor 7 generates a control signal. The inductive device 61 is not a component that must be provided, and whether it is provided depends critically on the characteristics of the sensor 7 . For example, if the sensor 7 is a magnetoelectric sensing device, the sensing device 61 is a magnet; the sensing method is different, and the setting method and setting content of the sensing device 61 adapted to the sensor 7 are different.

The above-mentioned sensor 7 is a signal pickup electrical device, which may be a reed switch, a Hall element, a proximity switch and the like.

The pot cover 2 is also provided with a second hole 22 , and the safety pressure relief device is installed in the second hole 22 . The safety pressure relief device includes a vent valve core 91 and a valve cover 92 . The ventilation valve core 91 is in communication with the inner pot, and the valve cover 92 covers the ventilation hole of the ventilation valve core 91 . The short rotating arm 6b is movably connected with the valve cover 92 and can drive the valve cover 92 to rotate or lift. When the control circuit 3 is out of control and the pressure of the inner pot is at an extreme high pressure, the piston 42 drives the rotating member 43 and the rotating arm 6b to rotate to the maximum limit position, and the short rotating arm 6b drives the valve cover 92 at this limit position and opens the ventilation valve core through the valve cover 92 91. Automatically and forcibly release the pressure of the inner pot.

The flexible connection between the above-mentioned short rotating arm 6b and the valve cover 92 may be a conjoined or non-conjoined flexible connection.

The control process of the present invention is as follows: after the pot cover 2 is covered on the pot body 1, the pot cover 2 of the electric pressure cooker completely seals the pot body 1 due to the sealing effect of the inner sealing ring of the pot cover 2 and the elastic sealing sleeve 5 inner pot. When the inner pot is heated and the air pressure rises, the lower part of the elastic sealing sleeve 5 is squeezed and deformed, and the air pressure pushes the piston 42 to move upward in a straight line in the bushing 41; The rotating mechanism provided therebetween pushes the rotating member 43 to rotate, and also compresses the spring 40 constantly. When the rotating member 43 rotates, it drives the rotating arm 6 and the induction device 61 at its end to rotate or swing; when the induction device 61 rotates, the sensors 7 arranged at different positions on its lower part detect the magnetic signal of the induction device 61, And the magnetic signal is converted into an electrical signal, and transmitted to the control circuit 3; the control circuit 3 realizes the control of the pressure inside the electric pressure cooker according to the characteristics of different signals received. If the control of the above-mentioned control circuit 3 fails, when the pressure of the inner pot is at the set limit high pressure, the rotating short arm 6b drives the valve cover 92 to open the vent valve core 91, and automatically releases the pressure of the inner pot forcibly.

In summary, the advantages of the present invention are:

(1) Safe and reliable. The pressure transmission device 4 provided on the lid of the pressure cooker is used for pressure transmission, which avoids the need to transfer and detect the deformation and displacement of the inner pot and other parts during the working process of the traditional pressure cooker, and avoids the possibility of deformation and displacement of the inner pot and other parts. The safety accidents that occur also avoid the rapid aging and damage of the inner pot caused by frequent deformation of the inner pot, which greatly prolongs the life of the inner pot and the middle pot.

(2) Automatic safety protection. The invention is also equipped with an automatic pressure relief device, which can automatically release the pressure in the pot when other pressure control devices fail to achieve the purpose of safety protection.

(3) Multi-stage pressure automatic control. The present invention is provided with a plurality of sensors 7 on the pot body 1, and they correspond to the different positions of the induction device 61 respectively, and the position of the induction device 61 finally reflects the size of the air pressure in the pot, and through the control circuit 3, the present invention can Several pressure points of different sizes are controlled.

(4) High control precision. The present invention adopts the pressure transmission device 4 with small intermittent, reliable mechanical structure and stable transmission, the size of the air pressure in the pot can be accurately reflected on the mechanical position change of the induction device 61, and then through the conversion of the sensor 7, the air pressure-mechanical conversion amplification is completed - The electric signal conversion link, combined with the control circuit 3, can realize the air pressure control in the pot stably and reliably.

Because the present invention has the above advantages, it is widely used in various electric pressure cookers.

Description of drawings

Fig. 1 is a kind of structural representation of prior art;

Fig. 2 is the structural exploded view of electric pressure cooker of the present invention;

Fig. 3 is a bushing structure diagram of the pressure transmission device of the present invention;

Fig. 4 is a schematic diagram of the assembly of the bush and the elastic sealing ring of the pressure transmission device of the present invention;

Fig. 5 is a piston structure diagram of the pressure transmission device according to Embodiment 1 of the present invention;

Fig. 6 is a structural diagram of the rotating part of the pressure transmission device according to Embodiment 1 of the present invention;

Fig. 7 is a schematic diagram of the assembly of the piston and the rotating member of the pressure transmission device according to Embodiment 1 of the present invention;

Fig. 8 is a structural diagram of the rotating part of the pressure transmission device according to Embodiment 2 of the present invention;

Fig. 9 is a piston structure diagram of the pressure transmission device according to Embodiment 2 of the present invention;

Figure 10 is a sensor location diagram of the present invention.

Detailed ways

Below in conjunction with accompanying drawing, further the specific embodiment of the present invention.

Embodiment 1 :

As shown in FIG. 2 , an electric pressure cooker of the present invention includes a pot body 1 and a pot cover 2 . A control circuit 3 is set in the pot body 1, and a pressure transmission device 4 and an elastic sealing sleeve 5 are set on the pot cover 2; as shown in FIG. On the wall of the first hole 21.

The above-mentioned pressure transmission device 4 includes a bushing 41, a piston 42, and a rotating member 43, which are important parts of this embodiment. The specific structures of the bushing 41, the piston 42, and the rotating member 43 will be described in detail below.

As shown in Figures 3 and 4, the bushing 41 is an elliptical body adapted to the shape and size of the elastic sealing sleeve 5 and is open up and down, and the sleeve body 41b of the bushing 41 is embedded and fixed in the elastic sealing sleeve 5, Thereby, through the pressing effect of the bushing 41 on the elastic sealing sleeve 5, the lip edge 5a of the elastic sealing sleeve 5 forms a more reliable seal with the hole wall surface of the first hole 21 of the pot cover 2. The length of the sleeve body 41b is less than the depth of the elastic sealing sleeve 5, so that a certain telescopic displacement distance can be reserved for the bottom of the elastic sealing sleeve 5; A compression ring 44 is arranged between the bushing 41 , and the lip edge 5 a of the elastic sealing sleeve 5 is pressed against the pot cover 2 through the compression ring 44 . In addition, a compression ring 45 is provided on the bushing 41 , and the bushing 41 is pressed against the compression ring 44 by the compression ring 45 .

The lip 41a is provided on the upper part of the bushing 41 to prevent the bushing 41 from completely falling into the bottom of the sealing sleeve 5 due to external force during use.

As shown in FIG. 5 , the cross section of the piston 42 is also elliptical. Due to the elliptical shape, the piston 42 does not rotate radially but only slides axially in the bushing 41 . The upper center of piston 42 is provided with a cylindrical hole 42b; two spiral oblique grooves 42c are set on the inner wall of the cylindrical hole 42b; the starting point of the oblique groove 42c is arranged on the top of the cylindrical hole 42b, and the oblique groove 42c The expanded view of the cylinder is an oblique line starting from the top of the cylindrical hole 42b, and the angle between the oblique line and the bottom edge is about 45 degrees. The piston 42 is a mechanism connecting the past and the future. It is placed in the bushing 41, and the bushing 41 is placed in the sealing sleeve 5, so the piston 42 can feel the deformation from the sealing sleeve 5, that is, the air pressure parameter of the inner pot of the electric pressure cooker. , The piston 42 slides axially on the bushing 41 .

As shown in FIG. 6 , the rotating member 43 is a cylinder adapted to the cylindrical hole 42 b provided at the center of the upper part of the piston 42 . Two raised ribs 43b are arranged on the outer wall of the rotating member 43, and the depth and width of the raised ribs 43b are matched with the oblique groove 42c. The outer diameter of the rotary member 43 is slightly smaller than the inner diameter of the cylindrical hole 42 b of the piston 42 . When the rotating member 43 is packed into the cylindrical hole 42b of the piston 42, the oblique groove 42c in the cylindrical hole 42b can be smoothly inserted into the rib 43b provided on the outer wall of the rotating member 43, so that the oblique groove 42c When walking along the convex rib 43b, the rotary member 43 is driven to rotate, so that the linear motion is transformed into a rotary motion. The rib 43b is a section of protruding spiral rib.

In order to better illustrate the assembly structure of the main structural parts of the pressure transmission device 4 in this embodiment, when the compression ring 44 and the compression ring 45 are omitted, as shown in Figure 7, the center of the lower part of the rotating member 43 is provided with Cylindrical hole 43a; a spring 40 is arranged in the cylindrical hole 43a, and the length of the spring 40 is greater than the depth of the cylindrical hole 43a of the rotary member 43. In this way, when assembling, the spring 40 is first inserted into the cylindrical hole 43a of the rotating member 43, and then the rotating member 43 is set on the piston 42; due to the tension of the spring 40, the bottom of the rotating member 43 and the piston 42 can be There is a certain distance between them. When the external pressing force moves the piston 42, it not only drives the rotating member 43 to rotate, but also continuously compresses the spring 40; when the pressing force is lost, the tension of the spring 40 causes the piston 42 and the rotating member 43 to return to their original positions .

As shown in Figure 6, the top 43c of the rotating member 43 is fixedly connected to the long rotating arm 6a and the short rotating arm 6b; magnet.

In order to fix the above-mentioned pressure transmission device 4, as shown in Figure 2, the handle 23 has a corresponding hollow structure; the rotating member 43 is rotatably connected with the handle 23 of the pot cover 2 through the fixed piece 8; a lower part of the fixed piece 8 can also be added Auxiliary fixing sheet 81. The fixed piece 8 is a sheet structure with a central groove in the center, and the top of the rotating member 43 penetrates into the central groove of the fixed piece 8 and can rotate but cannot move axially, so that the rotating member 43 is firmly fixed in the handle 23 of the pot cover .

As shown in Figure 10, sensor 7 is arranged at the corresponding position of the upper edge of pot body 1 and induction device 61, because induction device 61 in the present embodiment is a magnet, sensor 7 is a Hall magnetoelectric conversion device, sensor 7 and The control circuit 3 is electrically connected. In order to realize the multi-level control function of the present embodiment, the sensor 7 in the present embodiment is provided with 4, is respectively sensor 7a, sensor 7b, sensor 7 and sensor 7d, and 4 sensors 7 are all electrically connected with control circuit 3, all It can receive the signal from the induction device 61 and convert the induction signal into an electric signal, and send it to the control circuit 3 for corresponding processing. Since the signal of the induction device 61 actually reflects the pressure parameter of the electric pressure cooker, combined with the control circuit 3, this embodiment can realize multi-stage pressure control.

In this embodiment, a safety pressure relief device is also provided. As shown in FIG. 2 , the safety pressure relief device is installed in the second hole 22 on the pot cover 2 . The vent hole in the vent valve core 91 communicates with the inner pot, and the valve cover 92 covers the vent hole of the vent valve core 91 . The short rotating arm 6b is movably connected with the valve cover 92 and can drive the valve cover 92 to rise. When the control circuit 3 is out of control and the pressure of the inner pot is at an extreme high pressure, the piston 42 drives the rotating member 43 and the rotating arm 6b to rotate to the maximum limit position, and the short rotating arm 6b drives the valve cover 92 at this limit position and opens the ventilation valve core through the valve cover 92 91. Automatically and forcibly release the pressure of the inner pot. The above-mentioned rotating short arm 6b and the bonnet 92 are movably connected, which is a non-joined movably connected.

Embodiment 2 :

The main difference between this embodiment and Embodiment 1 is that the structure of the pressure transmission device 4 is different. Specifically, it is the difference in the steering mechanism that realizes the conversion of linear motion into rotary motion. As shown in FIGS. 8 and 9 , the outer diameter of the rotating member 43 is substantially the same as that of the piston 42 . Three protruding posts 42d are provided on the top edge of the piston 42; three inclined surfaces 43d corresponding to the protruding posts 42d are provided in the circumferential direction of the lower edge of the rotating member 43. Therefore, when the protruding post 42d of the piston 42 moves linearly up and down, the protruding post 42d pushes the inclined surface 43d at the lower part of the rotating member 43 to slide, thereby driving the rotating member 43 to rotate. This type of transmission is similar to toothed transmission.

The above two embodiments are only preferred implementations of the present invention, and the present invention is not limited to these two implementations, as long as it has the structural device of the present invention or an equivalent conversion structural device, it should be regarded as the protection scope of the present invention.

Claims (10)

1. An electric pressure cooker, comprising a pot body (1) and a pot cover (2); a control circuit (3) is set in the pot body (1), and a pressure transmission device (4) is set on the pot cover (2) and an elastic sealing sleeve (5); the elastic sealing sleeve (5) is fixed and sealed on the hole wall of the first hole (21) of the pot cover (2); it is characterized in that: The pressure transmission device (4) includes a bushing (41), a piston (42) and a rotating part (43); The bushing (41) is embedded in the elastic sealing sleeve (5); The bush (41) is embedded with the piston (42) which can slide axially; The rotating member (43) is transmission-connected with the piston (42) capable of driving its radial rotation; The top of the rotating member (43) is fixedly connected with a long rotating arm (6a), and the end of the long rotating arm (6a) is fixedly connected with an induction device (61); A sensor (7) is provided at a position corresponding to the upper edge of the pot body (1) and the induction device (61), and the sensor (7) is electrically connected to the control circuit (3); The rotating member (43) is rotatably connected with the pot cover (2) through the fixing piece (8). 2. The electric pressure cooker according to claim 1, characterized in that: the upper center of the piston (42) is provided with a hole (42b), and the inner wall of the hole (42b) provided at the upper center of the piston (42) is provided with Boss; the outer wall of the rotating part (43) is provided with an oblique groove, the rotating part (43) is placed in the upper center hole (42b) of the piston (42), and the boss can be placed in the sliding in the oblique groove; a spring (40) is arranged between the rotating member (43) and the piston (42). 3. The electric pressure cooker according to claim 1, characterized in that: more than one protruding post (42d) is arranged in the circumferential direction of the top edge of the piston (42); There are inclined surfaces (43d) corresponding to the number of the protruding columns (42d); a spring (40) is arranged between the rotating member (43) and the piston (42). 4. The electric pressure cooker according to claim 2 or 3, characterized in that: a hole (43a) is set in the center of the lower part of the rotating member (43), and the spring (40) is placed in the center of the rotating member (43). In the hole (43a) set in the center of the lower part. 5. The electric pressure cooker according to claim 4, characterized in that: the inner wall of the bush (41) is axially provided with ribs, and the outer wall of the piston (42) is axially provided with the ribs. The piston (42) capable of axially sliding is embedded in the bush (41) in an adapted groove. 6. The electric pressure cooker according to claim 5, characterized in that: a lip edge (5a) is provided on the upper part of the elastic sealing sleeve (5), and the lip of the lip edge (5a) is embedded in the pot cover (2 ) on the wall of the first hole (21). 7. The electric pressure cooker according to claim 1, characterized in that: said pot cover (2) is also provided with a second hole (22) and a second hole (22) installed on said pot cover (2) ) in the safety pressure relief device; the safety pressure relief device includes a vent valve core (91) and a valve cover (92); the top of the rotating member (43) is fixedly connected to the rotating short arm (6b), and the rotating short An arm (6b) is articulated with said valve cover (92) and capable of actuating said valve cover (92). 8. The electric pressure cooker according to claim 6, characterized in that: said pot cover (2) is also provided with a second hole (22) and a second hole (22) installed on said pot cover (2) ), the safety pressure relief device includes a vent valve core (91) and a valve cover (92); An arm (6b) is articulated with said valve cover (92) and capable of actuating said valve cover (92). 9. The electric pressure cooker according to claim 6, characterized in that: one or both ends of the spring (40) are provided with balls. 10. The electric pressure cooker according to claim 1, characterized in that: said fixing piece (8) is a "door" or "匚" shaped frame, and the bottom of the "door" or "匚" shaped frame is fixed on On the described pot cover (2).

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