CN110025214B

CN110025214B - Pressure-adjustable heating cooker

Info

Publication number: CN110025214B
Application number: CN201910287031.2A
Authority: CN
Inventors: 李述星
Original assignee: Fanfei Beijing Technology Co ltd
Current assignee: Fanfei Beijing Technology Co ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2021-06-04
Anticipated expiration: 2039-04-10
Also published as: CN110025214A

Abstract

The present disclosure provides an adjustable pressure type heating cooker, including a housing main body; an inner pot placed in the housing main body; the upper cover body is rotatably clamped on the shell main body and forms a cooking space with the inner pot; a steam space is formed in the upper cover body, a first vent hole is formed in the upper cover body, and the first vent hole is communicated with the cooking space and the steam space; the first pressure regulating valve body includes: the limiting arc is positioned around the first vent hole; the ball-shaped object is placed on the limiting arc; and the driving assembly is used for driving the ball to move in the space limited by the limiting arc so as to open or close the first vent hole, so that the overpressure phenomenon cannot occur in the cooking space. The second vent hole is also connected with the steam space; the second pressure regulating valve body comprises a ventilation frustum and is used for being positioned above the second ventilation hole; the sealing ring is installed corresponding to the ventilation frustum hole; and the driving assembly is used for driving the sealing ring to move relative to the ventilating cone table and opening or closing the second ventilating hole, so that the pressure in the cooking space works under a set value.

Description

Pressure-adjustable heating cooker

Technical Field

The utility model relates to a household electrical appliances field especially relates to an adjustable pressure formula heating cooking ware.

Background

At present, in the aspect of rice cooking, a few pressure-adjustable heating cookers (such as electric cookers) have the function of keeping a certain pressure in a cooker body. Under the condition that steam in the pot body is continuously gathered, the pressure rises, the steam in the pot body is quantitatively discharged, the pressure is ensured to be within a rated range, a good cooking effect is achieved, and the conventional steam discharge has multiple technical schemes.

Prior art 1 provides a pressure type rice cooker. Fig. 1a and 1b are schematic views showing an opening and closing mechanism of a pressure regulating valve in a pressure rice cooker of prior art 1. As shown in fig. 1a and 1b, the pressure regulating closing mechanism first pressure regulating valve 400 includes: a cover body 410 fixed to one side of the inner cover plate of the cover body facing the steam overflow cavity, which encloses a first valve space at the periphery of the first vent hole 250, and the surface of the cover body 410 is provided with a push-pull hole 411, a positioning hole 412 and an air release hole 413; a valve seat 420 fixed in the first valve space and having a longitudinal steam passage 421 formed at a position corresponding to the first vent hole 250; a ball 430 placed on the valve seat 420 in such a manner as to cover the steam passage 421 and be rolled back and forth in a prescribed direction; a stabilizer bar 440 provided in a horizontal direction, which transmits an external force into the first valve space, pushing the ball 430 to cover or roll off the steam passage 421; a first drive mechanism 460, the forward movable end of which extends into the vapor escape chamber, bears against or is fixed to the rear end of the stabilizer bar 440.

In the pressure regulating valve opening and closing structure, when the movable end of the first driving mechanism 460 is in the retracted state, the stabilizer bar 440 moves leftward due to the elastic force of the first compression spring 450, and the stopper 442 moves leftward, so that the ball 430 is pulled away from the position above the steam passage 421, the first pressure regulating valve 400 is in the open state, and the cooking space is communicated with the steam overflow chamber through the first valve space. The movable end of the first driving mechanism 460 is in an extended state, the top end of the first driving mechanism pushes the stabilizing rod 440 forward, and the ball 430 is pushed by the position-limiting part 442 to roll above the steam channel 421 against the elastic force of the first compression spring 450, so that the first pressure regulating valve 400 is in a closed state, and the steam overflow cavity is isolated from the cooking space.

Fig. 2 is a schematic view showing another pressure regulating valve opening and closing mechanism of the pressure rice cooker of the prior art 1, in which the second pressure regulating valve 500 includes: a stepper motor 510; the screw rod sliding table 520 is horizontally arranged, and the starting end of the screw rod is connected with the stepping motor 510; an L-shaped transmission arm 530, the middle of which is pivoted to the upper cover of the cover body, and the first end of which is fixed to the slider of the screw rod sliding table 520; a drive rod 540, the upper end of which abuts against or is fixed to the second end of the L-shaped drive arm 530, and the lower end of which passes through the frame portion and enters the steam overflow cavity; the upper end of the stepless adjusting valve 550 abuts against the lower end of the transmission rod 540, and the lower end of the stepless adjusting valve is elastically pressed on the second vent hole.

The second pressure regulating valve 500 regulates the pressure in the pressure space, when the pressure is required to be controlled to be raised, a backward signal is given to the stepping motor 510, the stepping motor pushes the screw of the screw sliding table 520 to move forward, so that the first end of the L-shaped transmission arm moves towards the direction a along with the movement of the sliding block, the other end of the L-shaped transmission arm pulls the transmission rod 540 upwards, the stepless regulating valve 550 is further loosened downwards, and the second vent hole is communicated with the steam overflow cavity;

the prior art also provides a graph of the pressure change inside the pot of a conventional pressure cooker. The graph of the pressure change shown in prior art 2 is shown in fig. 3. In the rice boiling stage, the pressure variation in the cooker is relatively large, and the curve is obvious.

The first pressure regulating valve shown in fig. 1a and 1b has a complicated structure and a ball stopper does not function well.

For the second pressure regulating valve in fig. 2, the stepping motor is adopted for driving, the control precision is low, the timely adjustment of the pressure in the pot body cannot be met, the pressure in the pot can move in a large range, and rice grains cannot be well incubated under fixed pressure.

For the pressure adjustment effect shown in fig. 3, the pressure fluctuation is large, which easily causes the phenomena of poor rice grain incubation integrity effect and rice grain breakage during rice grain outgoing.

Prior art 1: CN 104586248A;

prior art 2: CN 103989400 a.

BRIEF SUMMARY OF THE PRESENT DISCLOSURE

Technical problem to be solved

To above-mentioned technical problem, this disclosure provides an adjustable pressure formula heating cooking ware, accomplishes whole optimization promotion in the aspect of culinary art pressure adjustment.

(II) technical scheme

The present disclosure provides an adjustable pressure formula heating cooking ware, includes: a housing main body; an inner pot placed in the housing main body; the upper cover body is rotatably clamped on the shell main body, and a cooking space is formed between the upper cover body and the inner pot; a steam space is formed in the upper cover body, a first vent hole is formed in the upper cover body, and the first vent hole is communicated with the cooking space and the steam space; first pressure regulating valve body includes: the limiting arc is positioned around the first vent hole; the ball is placed on the limiting arc; the driving assembly is used for driving the ball to move in the space defined by the limiting arc so as to open or close the first vent hole, so that the cooking space is communicated with or disconnected from the steam space.

In some embodiments of the present disclosure, the drive assembly is an electromagnetic drive assembly.

In some embodiments of the present disclosure, the electromagnetic drive assembly comprises: a cylinder; a first electromagnetic coil mounted in the cylinder; a first spindle post movable along an axis of the cylinder; the safety push rod is arranged at the top end of the first spindle column; the return spring is connected with the safety push rod and the first spindle post and is used for providing elastic force for the safety push rod and the first spindle post; when the first electromagnetic coil is not energized, the elastic force enables the safety push rod to push the ball to leave the position above the first vent hole so as to open the first vent hole; when the first electromagnetic coil is excited, the first axial column and the safety push rod are driven by the first electromagnetic coil to overcome the elastic force of the return spring, so that the safety push rod moves towards the direction away from the ball, the ball returns to the position above the first vent hole to close the first vent hole, and meanwhile, the safety push rod props against the cover opening switch, so that the upper cover body cannot be opened in the state.

In some embodiments of the present disclosure, the safety pusher comprises: a first deformable sealing body deformable in a direction toward and away from the globe; the push rod body is connected with the reset spring and the first axle center column, one end of the push rod body is a connecting end, and the other end of the push rod body is provided with a positioning hole; the push rod limiting part is used for limiting the moving distance of the positioning hole and enabling the safety push rod to slide in a fixed stroke range; when the first electromagnetic coil is not excited, the first spindle post pushes the push rod body to the limit position of the push rod limiting part, and the connecting end of the push rod body pushes the ball to leave the position above the first vent hole through the first deformation sealing body.

In some embodiments of the present disclosure, the vapor space comprises: a steam overflow cavity, the first vent hole communicating the cooking space with the steam overflow cavity of the steam space; still be equipped with in the upper cover body: the ball valve seat is fixed in the steam overflow cavity, and the first vent hole is formed in the ball valve seat; the limiting arc is formed on the ball valve seat.

In some embodiments of the present disclosure, a second pressure regulating valve body is further disposed in the upper cover body, the second pressure regulating valve body has a second vent hole, and the second vent hole communicates the cooking space and the steam space; and the second pressure regulating valve body controls the second vent hole to be opened and closed, so that the cooking space is communicated with or disconnected from the steam space.

In some embodiments of the present disclosure, the second pressure regulating valve body includes: the ventilation support is provided with an air passage and the second ventilation hole; the ventilation cone is fixed on the ventilation support, and the steam space is communicated with the cooking space through the ventilation cone, the air passage and the second ventilation hole; and an electromagnetic driving device for opening and closing the second ventilation hole to connect and disconnect the cooking space with and from the steam space.

In some embodiments of the present disclosure, the electromagnetic driving apparatus includes: the second deformation sealing body, the second spindle post and the second electromagnetic coil; the second electromagnetic coil drives the second shaft core column to move, the front end of the second shaft core column is connected with the second deformable sealing body, and the second vent hole is opened and closed by stretching the second deformable sealing body.

In some embodiments of the present disclosure, further comprising: a pressure regulating valve control mechanism and a sensor group; and the pressure regulating valve control mechanism controls the first pressure regulating valve body and/or the second pressure regulating valve body according to the information provided by the sensor group so as to regulate the pressure in the cooking space.

(III) advantageous effects

(1) In the first pressure regulating valve body, the position of the spherical object is relatively fixed through the guiding action of the periphery of the limiting arc, so that the heating cooker is moved under the unintentional condition, large rolling deviation cannot be generated, a large amount of escape phenomenon of steam cannot occur, the accident that the steam hurts people is avoided, and meanwhile, under the action of the safety push rod, the cover opening switch cannot be opened, and the phenomenon that rice milk and steam in the pot leak out cannot be caused;

(2) in the second pressure regulating valve body, the electromagnetic coil is used, so that the response speed of the valve is increased, the pressure in the cooking space can be controlled more accurately, and the pressure in the cooking space is fixed at a certain value and slightly changed up and down.

Drawings

FIGS. 1a and 1b are a side view and a top view, respectively, of a first pressure regulating valve opening/closing mechanism of an adjustable heating cooker of prior art 1;

FIG. 2 is a schematic diagram of a second pressure regulating valve of an adjustable cooking device of the prior art 1;

FIG. 3 is a graph showing a change in the inner pressure of the pressure rice cooker of the prior art 2;

FIG. 4 is a cross-sectional view of a variable pressure heating cooker according to an embodiment of the disclosure, wherein the first pressure regulating valve body is in a closed state;

FIG. 5 is a partial cross-sectional view of the open state of the first pressure regulating valve body of FIG. 4;

FIG. 6 is another cross-sectional view of a pressure adjustable heating cooker according to an embodiment of the disclosure, wherein the second pressure adjustment valve body is in an open state;

FIG. 7 is a partial cross-sectional view of the second pressure regulator valve body of FIG. 6 in a closed position;

FIG. 8 is an exploded perspective view of the second pressure regulating valve body construction shown in FIG. 7;

FIG. 9 is a graph illustrating a temperature change in the pot of the adjustable pressure heating cooker according to the present disclosure;

fig. 10 is a graph illustrating a pressure change in the pot of the adjustable pressure heating cooker according to the embodiment of the disclosure.

Fig. 11 is a schematic structural view of a second pressure regulating valve body according to an embodiment of the present disclosure.

[ description of main reference numerals of the disclosure ]

001-cooker body;

010-pot sealing ring;

020-upper cover;

021-inner upper cover;

022-inner pot cover;

020 a-first steam vent;

020 b-second steam vent;

030-inner pan;

040-housing body;

050-steam box;

050 a-primary vent channel;

050 b-steam overflow cavity;

060 a-a sidewall heating section;

060b — primary heating section;

060 c-top heating part;

070-bottom temperature sensor;

080-top temperature sensor;

100-a first pressure regulating valve body;

101-ball valve seat;

101 a-a first vent;

101 b-a limit arc;

102-a sphere;

103-a first deformable sealing body;

104-a first mandrel cylinder;

105-a return spring;

106-a first electromagnetic coil;

107-safety push rod;

108-a push rod limiting part;

107 a-connection end;

107 b-locating holes;

200-a second pressure regulating valve body;

201-sealing table;

202-screws;

203-a ventilation cone;

204-sealing ring;

205-a breather support;

205 a-a second vent;

205 b-straight through vent;

206-a sealing ring;

207-a second deformable seal;

208-second spindle post;

209-second electromagnetic coil.

Detailed Description

The adjustable pressure type heating cooker is commonly called as an electric cooker or an electric pressure cooker, and can be used for steaming rice, cooking porridge or stewing meat, fish and the like. Because the pressure-adjustable heating cooker is delicious in cooking and rich in functions, the pressure-adjustable heating cooker becomes a necessary kitchen appliance at home.

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the embodiments and the drawings in the embodiments. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The adjustable pressure type heating cooker of the first embodiment of the present disclosure, as shown in fig. 4, includes: the cooker body 001. The cooker body 001 includes: the outer casing main body 040, the upper cover body 020 and the inner pan 030.

The casing main body 040 has a hollow cavity. The inner pan 030 is placed in the hollow cavity. Similar constructions of the cooker body 001 are well known to those skilled in the art and will not be described in further detail herein.

The upper cover 020 is rotatably engaged with the main casing 040 of the cooker body 001 to cover the inner pan 030, so that a cooking space is formed therebetween. In order to ensure the tightness of the cooking space, a pan body sealing ring 010 is further arranged between the upper cover body 020 and the inner pan 030.

The upper cover 020 includes: an inner upper cover 021 and an inner pot cover 022, and a steam space is formed between the inner upper cover 021 and the inner pot cover 022. Wherein the vapor space comprises a vapor escape cavity and a vapor passage. The steam overflow cavity is communicated with a cooking space through a first steam hole 020a and a second steam hole 020b which are arranged on the inner pot cover 022, and is communicated with a space outside the cooker body 001 through a main ventilation channel 050 a.

In order to cook food in the cooking space in an all-around manner, the cooker body 001 is provided with a heating assembly for heating the cooked object in the cooking space. The heating assembly comprises a primary heating section 060b, a sidewall heating section 060a and a top heating section 060 c. The main heating portion 060b is provided at the bottom of the hollow cavity of the casing main body 040, and as an example, the inner pan 030 can be heated by electromagnetic induction. The sidewall heating portion 060a is provided on the hollow sidewall of the casing main body 040. The top heating part 060c is disposed on the inner top cover 021.

Meanwhile, in order to monitor the environment of the cooking space, the cooker body 001 is provided with a sensor group for monitoring the temperature and pressure in the cooking space. The sensor group includes: bottom temperature sensor 070, top temperature sensor 080, and pressure sensor 090. The bottom temperature sensor 070 is arranged at the bottom of the hollow cavity of the casing main body 040 and is close to the center of the inner pot 300. The pressure sensor 090 and the top temperature sensor 080 are provided on the side of the upper cover 020 facing the cooking space. A sealing ring 206 is arranged between the pressure sensor 090 and the inner pan 030 for ensuring that the pressure detected by the pressure sensor 090 is consistent with the pressure of the inner pan 030.

A first pressure regulating valve body 100 is installed between the casing main body 040 and the upper cover 020, and the first pressure regulating valve body 100 is connected to the steam overflow chamber and is used for controlling the opening and closing of a first vent hole 101a which communicates the cooking space with the steam space.

A pressure regulating valve control mechanism is further arranged in the cooker body 001 and used for controlling the first pressure regulating valve body 100 according to information provided by the sensor group so as to regulate the pressure in the cooking space.

The first pressure-regulating valve body 100 is used to control the communication of the first vent hole 101a with the space outside the cooker body 001. When the first pressure regulating valve body 100 is in an open state, the first vent hole 101a is opened, and steam in the cooking space enters the steam overflow cavity through the first vent hole 101a, enters the steam box 050 through a steam passage, and is then discharged to a space outside the cooker body 001; when the first pressure-regulating valve body 100 is in a closed state, the first vent hole 101a is closed, and steam in the cooking space cannot enter the steam overflow chamber through the first vent hole 101 a.

As shown in fig. 4 and 5, in this embodiment, the upper cover 020 further includes: ball valve seat 101, ball 102. The first pressure-regulating valve body 100 includes: a return spring 105, a safety plunger 107 and a plunger member. The return spring 105, the safety plunger 107 and the plunger member constitute a drive assembly.

The ball valve seat 101 is fixed in the steam overflow cavity of the inner upper cover 021 and is opened with a first vent hole 101 a. The first vent hole 101a is a longitudinal steam passage for communicating the steam overflow chamber with the cooking space.

The ball 102 is placed on the ball seat 101, covers the first ventilation hole 101a, and rolls on the ball seat 101 in two opposite directions (e.g., left and right directions in fig. 5).

The safety plunger 107 is movable in a direction toward and away from the ball 102 (left-right direction in fig. 5). When the safety device is subjected to external force, the top end of the safety push rod 107 pushes the ball 102, so that the ball 102 rolls away from the position of the first vent hole 101 a; alternatively, the tip of the safety plunger 107 is separated from the ball 102 so that the ball 102 covers the first ventilation hole 101 a.

The plunger type part includes: a cylinder, a first spindle post 104, a safety pushrod 107, and a first solenoid 106. The first electromagnetic coil 106 is mounted in the cylinder and wound in a cylindrical shape. The first stem 104 is movable back and forth (in the left-right direction in fig. 5) in the cylinder. The safety plunger 107 is mounted on the front end portion of the first stem 104, the front end portion thereof abuts against the stabilizer bar, and the top end of the first stem 104 is aligned with the safety plunger 107.

When the first pressure-regulating valve body 100 receives an opening signal, the first solenoid 106 in the cylinder is not excited and is in an extended state by the return spring 105, and thus its top end is in an extended state. When the first pressure regulating valve body 100 receives a closing signal, the first electromagnetic coil 106 is excited to contract, and pushes the first spindle post 104 and the safety push rod 107 to move rightwards, so that the top end of the safety push rod is in a contracted state.

The return spring 105 connects the safety plunger 107 and the first stem 104, and provides an elastic force to the safety plunger 107 and the first stem 104. Under the elastic force, the tip end of the safety plunger 107 is separated from the ball 102, so that the ball 102 covers the first vent hole 101 a.

In this embodiment, the inner upper cover 021 may be integrally formed, and the inner upper cover 021 is integrally connected to the steam passage, so that the cooking space of the inner pot 030 is communicated with the outer steam box 050. The inner top cover 021 can also be prepared by the body and the lid respectively, and can also be an open structure, and does not have special air leakage hole, and does not all produce the influence to the implementation of this disclosure.

Further, as for the ball valve seat 101, it may be entirely located in the steam overflow cavity 050b, or may be only partially located in the steam overflow cavity 050b, or in some cases, a dedicated steam overflow cavity 050b and ball valve seat 101 may not be provided, as long as it is possible to have the push rod stopper 108 that limits the range of movement of the ball 102 in the horizontal direction and to have a support for the horizontal movement of the stabilizer bar, the present disclosure can be achieved.

The safety push rod 107 includes: the push rod comprises a push rod body, a first deformation sealing body 103 with a T-shaped section and a push rod limiting part 108.

One end of the push rod body is a connecting end 107a, and the other end of the push rod body is provided with a positioning hole 107 b.

The first deformable sealing body 103 is fixed to an opening in the side wall of the steam escape cavity 050b, which is deformable in a direction toward and away from the ball 102.

And a push rod limiting part 108 which is arranged on the same horizontal plane as the safety push rod 107 and is opposite to the safety push rod 107 and used for limiting the moving distance of the push rod body positioning hole 107b so that the safety push rod 107 slides in a fixed stroke range.

When the first electromagnetic coil 106 is not energized, the first spindle post 104 pushes the safety plunger 107 to the limit position of the plunger stopper 108 by the elastic force of the return spring 105, and the connecting end 107a of the plunger body pushes the ball 102 through the first deformable sealing body 103, so that the ball 102 rolls away from the position of the first air vent 101 a. When the first solenoid 106 is energized, the first stem 104 moves the connecting end 107a of the plunger body away from the ball 102 against the elastic force of the return spring 105, so that the ball 102 covers the first air vent hole 101 a.

In this embodiment, the surface of the ball seat 101 facing the ball 102 is formed with a limit arc 101b for limiting the rolling and resetting of the ball 102 at a fixed distance. The ball 102 is placed on a limit arc 101b of the ball seat 101, and the limit arc 101b is low in center and high in periphery. The center axis of the safety plunger 107, the center of the first deformable sealing body 103, and the center of the ball 102 are on the same horizontal plane.

The ball 102 can roll back and forth (left and right in fig. 5) under the limitation of the limitation arc 101b, thereby opening or closing the first ventilation hole 101 a. Further, the movement space of the ball 102 is defined within the inner space defined by the limit arc 101b, and does not move away from the first ventilation hole 101 a. The first spindle post 104 drives the safety push rod 107 to move under the elastic force of the return spring 105, and the safety push rod 107 can only horizontally slide and push the ball 102 under the action of the push rod limiting part 108. The ball 102 can only roll horizontally without shifting.

When the special steam overflow cavity 050b and the ball valve seat 101 are not arranged, the first vent hole 101a can be formed on the upper cover body 020, a limit arc 101b is formed around the first vent hole 101a of the upper cover body 020, and the ball 102 is directly placed on the limit arc 101 b.

The first pressure regulating valve body 100 of the present embodiment is switched between the open state and the closed state, and the specific process is as follows:

1. an open state: the first electromagnetic coil 106 is not excited, the first electromagnetic coil 106 loses the force on the first spindle post 104, under the action of the elastic force of the return spring 105, the safety push rod 107 moves leftwards, and drives the first deformation sealing body 103 to move leftwards, so that the ball 102 is pushed to leave the position above the first vent hole 101a, the first vent hole 101a is opened, the cooking space is communicated with the steam overflow cavity 050b through the first vent hole 101a, and the first pressure regulating valve body 100 is in an opened state;

2. and (3) closing state: the first electromagnetic coil 106 is excited, the first electromagnetic coil 106 is used for driving the first spindle post 104 to move rightwards under the force of the first electromagnetic coil 106, the ball 102 overcomes the elastic force of the return spring 105 and rolls to the position above the first vent hole 101a, the first pressure regulating valve body 100 is in a closed state, and the steam overflow cavity 050b is isolated from the cooking space. At the moment, even if the steam generating device shakes, steam cannot escape in a large amount due to the action of the limiting arc, and accidents of hurting people are avoided.

The ball 102 has a predetermined weight and closes the first ventilation hole 101a by its own weight. The ball 102 may be made of other materials having a certain density, such as organic materials, in addition to the metal materials. The displacement of the first deformed sealing body 103 is between 0.2mm and 1.5 mm.

In addition, in the present embodiment, the limiting arc 101b is in a hexagonal ring shape, but the present disclosure is not limited thereto, and the limiting arc 101b may also be in a ring shape of other shapes, for example, a square or octagonal ring shape, or a circular ring shape. In another implementation, the retaining arc 101b is not formed on the ball valve seat 101, but is fixed to the vapor escape cavity 050b, a hollow hemisphere that snaps over the ball 102, low on center and low on all sides.

It should be noted that, each component in the safety pushing rod 107 of the present embodiment may be prepared separately and welded and fixed, or may be prepared integrally. In addition, the push rod stopper 108 may be omitted in the case where the safety push rod 107 can be ensured to move stably in the horizontal direction. The push rod stopper 108 serves to prevent the safety push rod 107 from wobbling or shifting during the forward and backward movement. In addition, the first deformable sealing body 103 may also take the form of a seal of the remaining type. Meanwhile, the safety push rod 107 has the function of locking the cover opening switch, when the safety push rod is started, the cover opening button is pressed, the upper cover cannot be opened, and the phenomena of leakage, dumping and the like of rice contained in the inner pot are avoided.

Therefore, the position of the ball is relatively fixed by the aid of the combination of the safety push rod, the reset spring and the limit portion of the push rod, so that steam cannot escape in a large amount even if the heating cooker is shaken under an unintentional condition, misoperation is avoided, the cover opening switch is opened, rice milk is spilled, the inner pot moves outwards, and accidents such as steam and high-temperature rice are avoided.

For the purpose of brief description, any technical features of the first embodiment that can be applied to the same purpose are described herein, and the same description need not be repeated.

As shown in fig. 6, in the pressure-adjustable heating cooker of this embodiment, a second pressure-adjusting valve body 200 is further installed between the outer cover shell and the upper cover 020, and is connected to the steam overflow chamber 050b to control the opening and closing of a second vent hole 205a that communicates the cooking space with the steam overflow chamber 050 b. The second pressure regulating valve body 200 and the first pressure regulating valve body 100 are respectively installed at different positions of the inner upper cover 021.

The pressure regulating valve control mechanism controls the first pressure regulating valve body 100 and/or the second pressure regulating valve body 200 according to information provided by the sensor group to regulate the pressure in the cooking space.

As shown in fig. 7 and 8, the second pressure regulating valve body 200 includes: a vent support 205, a vent frustum 203, and a drive.

The ventilation support 205 is fixed on the upper cover body 020 and is provided with an L-shaped air passage, the bottom of the ventilation support is connected with a first steam hole 020a, one side of the ventilation support is provided with a second ventilation hole 205a, and the first steam hole 020a is communicated with the second ventilation hole 205a through the L-shaped air passage. A sealing ring 206 is arranged between the ventilating support 205 and the inner pan 030 for ensuring that the transitional connection has no gas leakage phenomenon.

The vent cone 203 is sealed by a sealing table 201 and is fixed on a vent support 205 by a screw 202, and the middle of the vent cone is sealed by a sealing ring 204. The vent cone 203 has a hollow passage communicating the vapor seal chamber 050b and the second vent hole 205 a.

The drive device includes: a second deformable sealing body 207, a second spindle post 208, and a second electromagnetic coil 209. The second electromagnetic coil 209 drives the second stem 208 to move, the front end of the second stem is connected with the second deformable sealing body 207, and the second vent hole 205a is opened and closed by stretching the second deformable sealing body 207, so that the cooking space and the steam overflow cavity 050b are communicated and disconnected.

The second vent hole 205a of the vent support 205 is used for communicating with an air passage, but the present embodiment is not limited thereto, and the air passage of the vent support may be in various forms, such as L-shaped, straight-through, T-shaped, U-shaped, and the like. The existing form can achieve a good cleaning function for residual rice residues remained in the channel.

When the second vent hole 205a is the L type vent hole, the L type vent hole can isolate ponding, the rice thick liquid that produces after the steam cooling back and flow back in the interior pot, can exhaust at the very first time during next time of ventilating and weather, keeps the air flue dry, and the air flue inner wall is bright and clean.

When the second vent hole 205a is a U-shaped vent hole, the U-shaped vent hole has a good sealing effect, and no backflow phenomenon occurs when the vent hole is opened or closed. No air flow dead angle and no residue.

When the second vent hole 205a is a straight-through vent hole, as shown in fig. 11, two straight-through vent holes 205b may be opened at the center of the vent holder 205 for the circulation of steam and rice slurry and rice grains carried by the steam. Because the second vent hole is linear, the circulation of steam and rice milk is facilitated, and the deposition phenomenon of rice grains and rice milk can not be generated under the action of the steam. In the steam discharging process, the rice milk and the rice grains in the channel are blown under the action of the steam force and are discharged out of the second pressure regulating valve along with the steam. Under the action of air flow direct blowing, the air passage can not generate the phenomena of no ventilation, small air flow, residual rice grains and the like, and the cleaning function in the air passage can be realized.

The second pressure regulating valve body 200 is a normally open valve, the top end of the second spindle post 208 seals the second vent hole 205a through the second deformable sealing body 207, and the cooking space and the steam overflow cavity 050b are disconnected. When the first pressure regulating valve body 100 is closed, the second pressure regulating valve body 200 can attract the second spindle column 208 through the driving of the excitation of the second electromagnetic coil 209, drive the second deformable sealing body 207 to deform in the direction away from the second vent hole 205a, open the second vent hole 205a, and discharge the steam in the cooking space, so that the pressure in the cooker can be freely regulated between 1.05 and 1.3 atm. And when the pressure in the cooker is more than 1.5atm, the second pressure regulating valve body 200 can automatically release the pressure to play the effect of a safety valve, so that the pressure regulating precision of the pressure-adjustable heating cooker in the cooking process is improved.

As shown in fig. 8, the second pressure-regulating valve body 200 is used to finely regulate the pressure in the cooking space, for example, between 1.0 and 1.5atm, when the first pressure-regulating valve body 100 is in a closed state, and to automatically release the pressure in the pot when the pressure in the pot is greater than a preset alarm pressure (for example, 1.5atm), so that the pressure in the pot is within a preset safety pressure range. When the second pressure regulating valve body 200 is opened, the second vent hole 205a is opened, and steam in the cooking space can enter the steam overflow cavity 050b through the second vent hole 205a and enter a space outside the cooker body 001 through the steam channel via the steam box 050; when the second pressure-regulating valve body 200 is closed, the second vent hole 205a is closed.

The working process of the second regulating valve in the embodiment is as follows:

1. when the pressure needs to be increased, the second electromagnetic coil 209 is electrified and excited, and attracts the second spindle post 208 to drive the second deformation sealing body 207 to deform, so as to seal the second vent hole 205a, cut off the communication between the cooking space and the steam overflow cavity 050b, and keep the pressure in the cooker continuously increased.

2. When the pressure needs to be reduced, the second electromagnetic coil 209 is powered off, the second spindle post 208 is entirely away from the second vent hole 205a (moves to the right in fig. 7) under the action of the deformation force of the second deformable sealing body 207, and the second deformable sealing body 207 is restored to the original state, so that the second vent hole 205a is communicated with the steam overflow cavity 050 b.

In this embodiment, the pressure sensor monitors the pressure condition in the cooking space, and the pressure regulating valve control mechanism controls the opening and closing of the first pressure regulating valve body 100 and the second pressure regulating valve body 200 by controlling the first electromagnetic coil 106 and the second electromagnetic coil 209 according to the pressure condition in the cooking space monitored by the pressure sensor, the temperature condition in the cooking space detected by the bottom temperature sensor 070 and the top temperature sensor 080, and the stored cooking process. The structure and related principles of the pressure sensor and the pressure regulator valve control mechanism are well known in the art and will not be described in detail herein.

Referring to fig. 9 and 10, the adjustable pressure cooking device of the present embodiment needs to go through the following stages when cooking rice:

1. preheating water absorption stage

The first pressure regulating valve body 100 and the second pressure regulating valve body 200 are both in a natural state (i.e. the first pressure regulating valve is in an open state, and the second pressure regulating valve is in an open state), and both do not participate in the work at this time, the side wall heating part 060a heats the rice-water mixture in the pot, the rice is kept for a period of time after reaching a predetermined temperature, and the rice is preheated to absorb water at this stage.

2. Concentrated heating stage

At this stage, the inner pot 030 was heated with a strong fire all the time, and when the top temperature sensor 080 detected 74 ℃, it was confirmed that the water in the pot started boiling. At this time, the first pressure regulating valve body 100 and the second pressure regulating valve body 200 enter the closed state.

3. Duration of boiling

At this stage, the boiling state of the water in the inner pot is maintained to gelatinize the starch of the rice. The cycle state is maintained at a stage in which the sidewall heating unit 060a and the top heating unit 060c are opened, the sidewall heating unit 060a and the top heating unit 060c are closed when the top temperature sensor 080 reaches 120 degrees, and the sidewall heating unit 060a and the top heating unit 060c are opened again when the top temperature sensor 080 falls to 110 degrees.

In the former stage of the process, the pressure inside the pot is in a boiling state, the pressure inside the pot is continuously increased to 1.2atm, and at this time, the second pressure regulating valve body 200 is opened for several microseconds (for example, 30 microseconds), and the pressure is reduced to 1.2atm once, and the second pressure regulating valve body 200 is closed.

In the middle stage of the stage, the pressure in the cooker is repeatedly raised and lowered at about 1.2atm, so that a large amount of bubbles are generated in the cooker to push the cooked object, and the cooked object can be heated and absorb water more uniformly.

The working modes of the two pressure regulating valves are as follows: the second pressure regulating valve body 200 is in a closed state (because the pressure can reach a larger value), the first pressure regulating valve body 100 is closed to increase the pressure to a preset pressure (such as 1.25atm), then the second pressure regulating valve body 200 is opened to open the steam passage for quantitative exhaust, and then the second pressure regulating valve body is closed, and the operation is repeated for a plurality of times (the times are usually determined according to the type and the amount of rice, and the final determination standard is determined according to the degree of softness and hardness of the rice which is selected by the user to be qualified).

In the latter stage of the process, the pressure is controlled and maintained above a predetermined value (e.g., 1.1atm) as shown in fig. 9, and the aim of the process is to make the rice gelatinized better at a higher temperature and improve the taste of the rice.

The working modes of the two pressure regulating valves are as follows: the first pressure regulating valve is in a closed state, and fine adjustment is performed through the second pressure regulating valve. First, the second solenoid 209 pushes the second stem 208, so that the second deformable sealing body 207 closes the second vent hole 205a, the pressure rapidly rises to a preset value (e.g. 1.2atm), when the pressure is greater than the preset value (e.g. 1.21atm), the second solenoid 209 is turned off for several microseconds (e.g. 20 microseconds), the second vent hole 205a is opened, and after the time is reached, the second vent hole 205a is closed. The reciprocating action can control the pressure to be close to the preset value more accurately.

4. Stage of drying water

In the first half of this stage, the inner pan 030 is continuously heated, the pressure is continuously controlled to be close to a preset value (e.g., 1.2atm), the second pressure regulating valve body 200 is controlled to be opened, and the redundant steam is discharged through the second pressure regulating valve body 200. Stopping heating when the temperature of the bottom of the pan rises to 120 ℃, and evaporating most of water in the pan; the pressure of the inner pan 030 begins to drop slowly. The side wall heating part 060a and the top heating part 060c maintain a circulating state.

5. Stewing and steaming stage

At this stage, the bottom heating part is heated in stages to maintain the temperature of the bottom of the pot between 95-97 deg.C, so that the gelatinization temperature of rice is increased to 100%. During the period, the first pressure regulating valve and the second pressure regulating valve are in an open state, and the redundant moisture is continuously evaporated until the cooking program is finished.

6. Stage of heat preservation

At this stage, the bottom heating part heats the pot periodically to keep the temperature of the pot bottom at 72 ℃, at this moment, the whole cooking process is finished, and the cover body can be opened to eat the rice.

So far, the introduction of the pressure-adjustable heating cooker is finished.

Furthermore, the above definitions of the various elements and methods are not limited to the particular structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by one of ordinary skill in the art, for example: the return spring and the deformable sealing body can be replaced by other suitable elastic elements.

In conclusion, the adjustable pressure type heating cooker disclosed by the disclosure relatively fixes the position of the ball-shaped object through the combination of the limiting arc, the safety push rod, the return spring and the limiting part, so that even if the heating cooker is shaken under an unintended condition, a large amount of steam cannot escape, and the occurrence of steam injury accidents is avoided. Meanwhile, the upper cover switch is locked, so that the phenomenon that rice milk and steam leak and hurt people due to misoperation of opening the pot body under pressure is avoided. Through improving the drive mode to second air-vent valve, improved the degree of accuracy, reliability and the precision range of control, be favorable to cooking more delicious food.

It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. In addition, the above definitions of the various elements are not limited to the specific structures, shapes or modes mentioned in the embodiments, and those skilled in the art may easily modify or replace them, for example:

(1) directional phrases used in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., refer only to the orientation of the drawings and are not intended to limit the scope of the present disclosure;

(2) the embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e. technical features in different embodiments may be freely combined to form further embodiments.

The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. An adjustable pressure type heating cooker, comprising:

a housing main body;

an inner pot placed in the housing main body;

the upper cover body is rotatably clamped on the shell main body, and a cooking space is formed between the upper cover body and the inner pot; a steam space is formed in the upper cover body, a first vent hole is formed in the upper cover body, and the first vent hole is communicated with the cooking space and the steam space;

first pressure regulating valve body includes:

the limiting arc is positioned around the first vent hole, the limiting arc is in a shape of low center and high periphery, the center of the limiting arc is close to the first vent hole, the periphery of the limiting arc is far away from the first vent hole, and the highest horizontal position of the peripheral edge of the limiting arc is lower than the center of the ball-shaped object;

the ball is placed on the limiting arc;

the driving assembly is used for driving the ball to move in a space defined by the limiting arc so as to open or close the first vent hole, so that the cooking space is communicated with or disconnected from the steam space; wherein the driving assembly includes a safety plunger movable in a direction toward and away from the ball and locking the lid opening switch, the safety plunger including:

a first deformable sealing body deformable in a direction toward and away from the globe;

the push rod body is connected with the reset spring of the driving assembly and the first spindle column, one end of the push rod body is a connecting end, and the other end of the push rod body is provided with a positioning hole;

and the push rod limiting part is used for limiting the moving distance of the positioning hole so that the safety push rod can slide in a fixed stroke range.

2. The adjustable pressure heating cooker of claim 1, wherein said drive assembly is an electromagnetic drive assembly.

3. The adjustable pressure heating cooker of claim 2, wherein said electromagnetic drive assembly comprises:

a cylinder;

a first electromagnetic coil mounted in the cylinder;

a first spindle post movable along an axis of the cylinder;

the safety push rod is arranged at the top end of the first spindle post;

the return spring is connected with the safety push rod and the first spindle post and is used for providing elastic force for the safety push rod and the first spindle post;

when the first electromagnetic coil is not energized, the elastic force enables the safety push rod to push the ball to leave the position above the first vent hole so as to open the first vent hole;

when the first electromagnetic coil is excited, the first electromagnetic coil drives the first spindle post and the safety push rod to overcome the elastic force of the return spring, so that the safety push rod moves towards the direction away from the ball, and the ball returns to the position above the first vent hole to close the first vent hole.

4. The adjustable pressure heating cooker of claim 3,

when the first electromagnetic coil is not excited, the first spindle post pushes the push rod body to the limit position of the push rod limiting part, and the connecting end of the push rod body pushes the ball to leave the position above the first vent hole through the first deformation sealing body.

5. The adjustable pressure heating cooker of claim 1, wherein said steam space comprises: a steam overflow cavity, the first vent hole communicating the cooking space with the steam overflow cavity of the steam space;

still be equipped with in the upper cover body: the ball valve seat is fixed in the steam overflow cavity, and the first vent hole is formed in the ball valve seat; the limiting arc is formed on the ball valve seat.

6. The adjustable pressure heating cooker as claimed in claim 1, wherein a second pressure regulating valve is further provided in the upper lid, the second pressure regulating valve having a second vent hole communicating the cooking space with the steam space;

and the second pressure regulating valve body controls the second vent hole to be opened and closed, so that the cooking space is communicated with or disconnected from the steam space.

7. The adjustable pressure heating cooker of claim 6, wherein said second pressure regulating valve body comprises:

the ventilation support is provided with an air passage and the second ventilation hole;

the ventilation cone is fixed on the ventilation support, and the steam space is communicated with the cooking space through the ventilation cone, the air passage and the second ventilation hole;

and an electromagnetic driving device for opening and closing the second ventilation hole to connect and disconnect the cooking space with and from the steam space.

8. The adjustable pressure heating cooker of claim 7, wherein said electromagnetic driving means comprises: the second deformation sealing body, the second spindle post and the second electromagnetic coil;

the second electromagnetic coil drives the second shaft core column to move, the front end of the second shaft core column is connected with the second deformable sealing body, and the second vent hole is opened and closed by stretching the second deformable sealing body.

9. The adjustable pressure heating cooker of claim 6, further comprising: a pressure regulating valve control mechanism and a sensor group;

and the pressure regulating valve control mechanism controls the first pressure regulating valve body and/or the second pressure regulating valve body according to the information provided by the sensor group so as to regulate the pressure in the cooking space.