CN112438587B - Pressure relief device, cooking appliance, cooking method, and computer-readable storage medium - Google Patents

Pressure relief device, cooking appliance, cooking method, and computer-readable storage medium Download PDF

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Publication number
CN112438587B
CN112438587B CN201910816944.9A CN201910816944A CN112438587B CN 112438587 B CN112438587 B CN 112438587B CN 201910816944 A CN201910816944 A CN 201910816944A CN 112438587 B CN112438587 B CN 112438587B
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China
Prior art keywords
pressure relief
piece
temperature
pressure
temperature change
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CN112438587A (en
Inventor
朱传斌
刘化勇
邢胜华
羊小亮
黄韦铭
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0802—Control mechanisms for pressure-cookers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/09—Safety devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/38—Parts, details or accessories of cooking-vessels for withdrawing or condensing cooking vapors from cooking utensils

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Cookers (AREA)

Abstract

The invention provides a pressure relief device, a cooking appliance, a cooking method and a computer readable storage medium, wherein the pressure relief device is used for the cooking appliance and comprises the following components: the base body is provided with a pressure relief channel communicated with a cooking cavity of the cooking appliance, and one end of the pressure relief channel forms a pressure relief port; the pressure relief piece is movably arranged on the pressure relief opening; first temperature becomes piece and second temperature becomes piece, locates the relative both sides of pressure release piece respectively to through the removal route that first temperature becomes piece and the removal of the restriction pressure release piece of second temperature becomes piece, wherein, first temperature becomes the piece and can drive the pressure release piece through deformation in order to open the pressure release mouth, and the second temperature becomes the piece and can drive the pressure release piece through deformation in order to seal the pressure release mouth. Through the technical scheme of the invention, the pressure relief device of the cooking utensil is effectively simplified, the number of parts is reduced, the control program of pressure relief is simplified, and the pressure relief device is simple in structure and easy to maintain.

Description

Pressure relief device, cooking appliance, cooking method, and computer-readable storage medium
Technical Field
The invention relates to the technical field of cooking equipment, in particular to a pressure relief device, a cooking appliance, a cooking method and a computer readable storage medium.
Background
A micro-pressure electric cooker applies a micro-pressure technology on the electric cooker, and the pressure range in the micro-pressure electric cooker is generally 0.1 to 30KPa (relative to the standard atmospheric pressure). Under the action of pressure, water and heat in the inner container of the electric cooker can fully permeate into the rice grains to cook rice with good taste. That is to say, under the action of slight pressure, the rice can be cooked thoroughly and has better taste.
The existing micro-pressure electric cooker generally controls pressure devices such as an electromagnet or an electromagnetic valve to maintain pressure or release pressure through a control device according to the numerical value of temperature or pressure, and the scheme needs more complex control logic and control programs and also needs to control the electromagnet or the electromagnetic valve, so the cost is higher, the number of control parts is more, the reliability is insufficient, and the maintenance is not easy.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
In view of the above, an object of the present invention is to provide a pressure relief device.
Another object of the present invention is to provide a cooking appliance.
It is yet another object of the present invention to provide a cooking method.
It is yet another object of the present invention to provide a computer-readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a pressure relief device for a cooking appliance, comprising: the base body is provided with a pressure relief channel communicated with a cooking cavity of the cooking appliance, and one end of the pressure relief channel forms a pressure relief port; the pressure relief piece is movably arranged on the pressure relief opening; first temperature becomes piece and second temperature becomes piece, locates the relative both sides of pressure release piece respectively to through the removal route that first temperature becomes piece and the removal of the restriction pressure release piece of second temperature becomes piece, wherein, first temperature becomes the piece and can drive the pressure release piece through deformation in order to open the pressure release mouth, and the second temperature becomes the piece and can drive the pressure release piece through deformation in order to seal the pressure release mouth.
In the technical scheme, the moving path of the pressure relief piece is limited by the first temperature change piece and the second temperature change piece, so that the pressure relief piece can open the pressure relief opening along with the deformation of the first temperature change piece when the first temperature change piece leaves from the pressure relief opening, can also open the pressure relief opening along with the deformation of the second temperature change piece, can reduce the pressure after the pressure is relieved in the cooking cavity and recover the temperature change of the first temperature change piece, and can return to the pressure relief opening along the moving path, so that the pressure relief opening can be opened or closed periodically, the periodic change of the pressure in the cooking cavity is realized, in such a structure, the first temperature change piece and the second temperature change piece can generate corresponding deformation to push the pressure relief piece to move due to the change of the temperature and the pressure, a control device is not needed to control the pressure relief, the number of parts is small, the structure is simple, and a special control logic or a control program is not needed, it is also easy to maintain in the event of a failure.
Specifically, a pressure relief channel communicated with a cooking cavity of the cooking appliance is arranged on the seat body, and a pressure relief opening is formed at one end of the pressure relief channel, so that when the pressure is high, namely exceeds a certain value, the pressure in the cooking cavity can be relieved through the pressure relief opening, and safety accidents caused by overlarge pressure are avoided; the pressure relief piece is movably arranged on the pressure relief opening, so that pressure relief can be realized by keeping the pressure relief piece away from the pressure relief opening, and then the pressure relief piece returns to the pressure relief opening to seal the pressure relief opening, so that the pressure in the cooking cavity is gradually recovered, and the cooking effect is ensured; the two opposite sides of the pressure relief piece are respectively provided with a temperature change piece (namely a first temperature change piece and a second temperature change piece), and the high-temperature and high-pressure airflow flowing out of the pressure relief opening can change the ambient temperature near the pressure relief opening, so that the temperature change pieces can deform along with the change of the temperature, and the pressure relief pieces are pushed to displace so as to open or close the pressure relief opening; in whole working process, the pressure release piece is opened or is sealed the pressure release mouth and realize through its displacement, and its displacement realizes through the deformation of temperature change piece, the deformation of temperature change piece then changes and realizes along with the influence of the high temperature high pressure draught that the pressure release mouth flows to the temperature, this kind of process need not set up special controlling means and realizes, but gradually expand along with the culinary art process and realize automatically, for the mode that adopts controlling means control solenoid valve, the electro-magnet, the structure is simplified by a wide margin, high reliability, also easy to maintain.
The pressure relief piece is arranged on the pressure relief opening, the pressure relief opening can be completely sealed and air-tight, or partially sealed, and a small amount of air flow still overflows from the pressure relief opening; in addition, the pressure relief opening can be located at one end of the pressure relief channel, or one end of the pressure relief channel is the pressure relief opening, or an outlet is additionally arranged on the pressure relief channel to serve as the pressure relief opening.
The base can be a part of the cooking appliance, for example, the base is a part of the upper cover or a part of the pot body, or can be a separately arranged structural device, for example, the upper cover is provided with a steam valve, and the base is arranged in the steam valve, or the upper cover is provided with a cover plate, and the base is arranged on the cover plate.
Alternatively, the first temperature-variable component and the second temperature-variable component may be any one of a metal component, a resin component, and a plastic component that can deform according to temperature, or the material of the first temperature-variable component or the second temperature-variable component may be a memory alloy.
Among the above-mentioned technical scheme, be equipped with the spigot surface along the direction tilt up who keeps away from the pressure release mouth on the pedestal, deformation can take place for first temperature change spare to make the pressure release spare remove along the spigot surface, in order to open the pressure release mouth.
In the technical scheme, the seat body is provided with the guide surface which is far away from the pressure relief opening and is inclined upwards, so that the pressure relief piece is in surface contact or line contact with the seat body, the pressure relief piece is favorable for displacement along the guide surface instead of moving everywhere, the pressure relief piece is easy to accurately reset, the guide surface is inclined upwards, and the resetting convenience of the pressure relief piece is further improved.
Optionally, the outer surface of one side of the pressure relief piece, which is in contact with the seat body, is a plane or a curved surface, so that the pressure relief piece is easy to be far away from the pressure relief opening under the pushing of the first temperature change piece, and the working stability and reliability of the pressure relief device are improved.
In addition, when the temperature change piece deforms, the pressure relief piece moves on the guide surface, and the moving direction of the pressure relief piece can be a direction which is far away from the pressure relief channel along the radial direction or a direction which forms a certain angle with the direction.
Wherein, need to explain that, before first temperature change piece takes place deformation, the pressure release piece is jack-up, and the small part pressure release mouth is opened, and after temperature change piece takes place deformation, the pressure release mouth is opened and is opened or the pressure release mouth is opened completely for the great majority of pressure release mouth promptly.
In particular, the pressure relief element can slide on the guide surface or can roll on the guide surface.
In the above technical solution, the pressure relief device further includes: spacing portion locates on the pedestal, and first temperature change piece can take place deformation to make the pressure relief piece can follow the spigot surface and remove to spacing portion.
In this technical scheme, through setting up spacing portion, when first temperature becomes the piece and takes place deformation promotion pressure relief piece and remove, can restrict the displacement of pressure relief piece, avoid the pressure relief piece to remove too far and lead to the second temperature to become the piece and touch when deformation and can not reach the pressure relief piece, the pressure relief piece can't get back to the pressure release mouth.
In the technical scheme, the pressure relief opening and the limiting part are respectively a first position and a second position of a moving path, the first temperature change piece is arranged on one side of the pressure relief opening, which is far away from the pressure relief piece, and the second temperature change piece is arranged on one side of the limiting part, which is far away from the pressure relief piece, wherein the pressure relief piece is positioned on the pressure relief opening, and the first temperature change piece can drive the pressure relief piece to move to the second position from the pressure relief opening through deformation; the pressure relief piece is located spacing portion, and the second temperature change piece can drive the pressure relief piece and remove to the first position by spacing portion through deformation.
In the technical scheme, the pressure relief opening and the limiting part are respectively a first position and a second position of a moving path, the first temperature change piece is positioned on one side of the pressure relief opening, which is far away from the pressure relief piece, and the second temperature change piece is arranged on one side of the limiting part, which is far away from the pressure relief piece, so that the structure can ensure that the pressure relief piece is not blocked by the first temperature change piece or the second temperature change piece in the moving process, and ensure that the pressure relief piece can freely move between the first position and the second position, thereby opening or closing the pressure relief opening; the first temperature change piece is positioned on one side of the pressure relief opening, which is far away from the pressure relief piece, so that the pressure relief piece is pushed to the limiting part, or to the second position, far away from the pressure relief opening during deformation; the second temperature change piece is positioned on one side of the limiting part far away from the pressure relief piece, so that the pressure relief piece is pushed to be far away from the limiting part and return to the pressure relief opening when deformed, namely the first position, and the pressure relief opening is sealed again.
It will be appreciated that, due to inertia, the path of travel of the relief member may also have an extreme position, i.e., a position that is reached by the maximum range of travel of the relief member, which is beyond the first or second position due to inertia, but after stabilization, the relief member may fall back to the first or second position.
In the above technical scheme, in the end face direction of the pressure relief opening, the distance between the first temperature change piece and the second temperature change piece from the pressure relief opening is different.
In this technical scheme, through setting up first temperature change spare and second temperature change spare and pressure release port's distance differently, make first temperature change spare and second temperature change spare be located the temperature of environment and have the difference, even adopt the same temperature change material like this, because the distance is different, the time difference of deformation also can be realized, be favorable to realizing after first temperature change spare produces deformation and promotes the pressure release spare and remove to spacing portion, second temperature change spare produces deformation again and promotes the pressure release spare and remove and reset, such simple structure, the material selection type is convenient, easily production and design.
It is understood that the distance from the first temperature-changing element and the second temperature-changing element to the pressure relief opening may be the distance from the center line of the pressure relief opening, the distance from the first temperature-changing element to the edge of the pressure relief opening adjacent to the first temperature-changing element, and the distance from the second temperature-changing element to the edge of the pressure relief opening adjacent to the second temperature-changing element.
In the above technical solution, the first temperature changing element specifically includes: the first temperature becomes layer and second temperature becomes layer, and the one side of piece is kept away from to the first temperature becomes layer is located on the second temperature becomes layer, and wherein, when first temperature becomes the piece and takes place deformation, the deformation volume on second temperature becomes layer is greater than the deformation volume on first temperature becomes layer, and first temperature becomes the piece and takes place deformation along the direction towards letting out the piece.
In this technical scheme, set up first temperature change into including first temperature change layer and second temperature change layer, and the deformation volume on two temperature change layers is different, is favorable to making the one side that the deflection is little when first temperature change produces deformation to produce thrust and promote the removal of pressure release piece, such simple structure easily produces and designs.
Optionally, the first temperature-changing layer and the second temperature-changing layer may be made of the same material, such as copper or iron, or may be made of different materials, such as copper and iron, or copper and engineering plastic with high temperature resistance.
In the above technical solution, the second temperature changing part specifically includes: the third temperature change layer and the fourth temperature change layer are arranged on one side, away from the pressure relief piece, of the third temperature change layer, wherein when the second temperature change piece deforms, the deformation amount of the fourth temperature change layer is larger than that of the third temperature change layer, and the second temperature change piece deforms along the direction towards the pressure relief piece.
In this technical scheme, set up the second temperature change into including third temperature change layer and fourth temperature change layer, and the deformation volume on two temperature change layers is different, is favorable to making the second temperature change produce when deformation deflection to the one side that the deformation diminishes to produce thrust and promote the pressure release and remove, such simple structure easily production and design.
Optionally, the third temperature-change layer and the fourth temperature-change layer may be made of the same material, such as copper or iron, or may be made of different materials, such as copper and iron, or copper and engineering plastic with high temperature resistance.
In the above technical solution, the deformation temperatures of the first temperature change member and the second temperature change member are different.
In this technical scheme, the deformation temperature of first temperature change piece and second temperature change piece is different, be favorable to first temperature change piece and second temperature change piece to produce the time point difference of deformation like this, the deformation of two temperature change pieces has the time difference promptly, be favorable to realizing producing deformation at first temperature change piece and promote after the pressure release piece removes to spacing portion, second temperature change piece produces deformation again and promotes the pressure release piece and remove and reset, and the deformation temperature of two temperature change pieces is different, the part overall arrangement of still being convenient for, reduce the position requirement to two temperature change pieces.
In above-mentioned technical scheme, the pressure release is the slice, and pressure relief device still includes: the supporting part is arranged on the seat body, the pressure relief piece can rotate on the supporting part to open or close the pressure relief opening, wherein the first temperature change piece can drive the pressure relief piece to rotate to the first position through deformation so as to open the pressure relief opening, and the second temperature change piece can drive the pressure relief piece to rotate to the second position through deformation so as to seal the pressure relief opening.
In the technical scheme, the support part is arranged on the seat body, and the pressure relief piece can rotate on the support part, so that the pressure relief piece can be pushed to rotate to the second position when the first temperature change piece is deformed, namely to the limiting part, and the pressure relief hole is opened to relieve pressure, thereby ensuring the safety of the cooking utensil; when the second temperature change piece deforms, the pressure relief piece can be pushed to rotate from the second position to the first position, namely the pressure relief opening is formed, so that the pressure relief opening is sealed, and the pressure in the cooking cavity rises again for cooking.
In addition, the pressure relief piece is arranged to be sheet-shaped, so that the position of the pressure relief piece is relatively stable and is not easy to move, the reliability of closing or opening the pressure relief opening by the pressure relief piece can be ensured, and the situation that the pressure relief opening cannot be closed due to random change of the position of the pressure relief piece is avoided; the mode that drives the pressure release piece and rotate and open the pressure release mouth takes place deformation through first temperature change piece, simple structure, easily installation and control.
In the above technical solution, the pressure relief device further includes: the valve cover is detachably connected with the seat body, and a pressure relief cavity is formed in the valve cover and the seat body after the valve cover is connected with the seat body; the elastic component, the one end fixed connection of elastic component in the inner wall in pressure release chamber, the other end and pressure release component fixed connection, the elastic component can make pressure release component press to the pressure release mouth.
Wherein, the one end that links to each other with the inner wall in pressure release chamber in the elastic component is in one side that the pressure release mouth is close to the pressure release piece, and first temperature change piece and second temperature change piece all do not take place deformation, and the elastic component is in compression state, or the one end that links to each other with the inner wall in pressure release chamber in the elastic component is in one side that the pressure release mouth kept away from the pressure release piece, and first temperature change piece and second temperature change piece all do not take place deformation, and the elastic component is in tensile state.
In the technical scheme, the valve cover is connected with the seat body to form the pressure relief cavity, so that high-temperature and high-pressure airflow rushed out of the pressure relief opening can form a high-temperature environment in the pressure relief cavity, and the first temperature change piece and the second temperature change piece are deformed through high temperature, so that the pressure relief piece is pushed to move; in addition, the pressure relief cavity can also block and buffer high-temperature and high-pressure airflow rushed out from the pressure relief opening, so that safety accidents caused by the direct rushing-out of the high-temperature and high-pressure airflow are avoided; the valve cover is detachably connected with the seat body, so that the maintenance and the repair are convenient, and the pressure relief cavity is cleaned; one end fixed connection of elastic component is in the inner wall of pressure release chamber, and the other end and pressure release component fixed connection, press the pressure release component to the pressure release mouth, can keep the pressure of pressure release component to the pressure release mouth on the one hand like this, promote the pressure threshold value that the pressure release component was backed up by pressure, avoid frequently opening and seal the pressure release mouth of pressure release component, on the other hand can also be when the pressure release component is pushed away from the pressure release mouth by first temperature change component, utilize the supplementary second temperature change component of elastic component to promote the pressure release component and reset.
In the above technical scheme, be equipped with at least one hole that leaks on the diapire of pedestal, the one end in hole that leaks is connected to the pressure release chamber, and the other end in hole that leaks is connected to the space outside the culinary art chamber to discharge the water in the pressure release intracavity to the space outside the culinary art chamber through the hole that leaks.
In this technical scheme, through set up the hole that leaks on the diapire at the pedestal, and the one end in the hole that leaks is connected to the pressure release chamber, the other end in the hole that leaks is connected to the outer space of culinary art chamber to discharge the water droplet in the pressure release intracavity to the outer space of culinary art chamber through the hole that leaks, can avoid pressure release intracavity moisture too much to lead to pressure increase or pollute the pressure release chamber like this.
In the above technical solution, the pressure relief device further includes: and the cooling device is arranged corresponding to the first temperature-changing piece so as to reduce the temperature of the environment where the first temperature-changing piece is located and/or reduce the temperature of the first temperature-changing piece when the cooling device is operated.
In this technical scheme, through setting up cooling device and corresponding to first temperature change piece setting to reduce the temperature of the environment that first temperature change piece is located through cooling device operation, be convenient for reduce ambient temperature fast like this, perhaps reduce the temperature of first temperature change piece, directly cool down first temperature change piece promptly, so that first temperature change piece recovers, thereby be convenient for realize letting out the reseing of piece, make the pressure release piece reseal the pressure release mouth.
Wherein, the cooling device comprises a fan, a condenser pipe or a natural ventilator and the like which can reduce the ambient temperature of the first temperature change element and/or the temperature of the first temperature change element.
The cooling device can be selected as a condenser pipe and arranged on the seat body or the valve cover at a position right opposite to the first temperature change piece, so that the condenser pipe can directly radiate the air in the environment where the first temperature change piece is located. It should be understood by those skilled in the art that it is within the scope of the present application to arrange the cooling device in a position where it can cool the first temperature changing element when in operation.
An aspect of the second aspect of the present invention provides a cooking appliance, including: a pot body; the upper cover, upper cover and a kind of deep pot body lock form the culinary art chamber, are equipped with the pressure relief device as above-mentioned any one technical scheme in the first aspect in the upper cover.
In this technical scheme, through be provided with the pressure relief device of any one above-mentioned technical scheme in cooking utensil to have all beneficial effects of above-mentioned technical scheme, no longer repeated here.
In the technical scheme, the upper cover is hinged with the cooker body, and the pressure relief piece resets to press the pressure relief opening when the upper cover is opened.
In the technical scheme, the upper cover is hinged with the cooker body, so that a user can conveniently open the upper cover; the pressure release piece resets and pushes down the pressure release mouth when the upper cover is opened, can avoid like this that there is high temperature high pressure draught to flow from the pressure release mouth when the upper cover is opened, scalds the user of opening the upper cover, has promoted the security that cooking utensil used.
In the above technical solution, the cooking appliance includes a heating device with adjustable power.
In this technical scheme, through set up power adjustable heating device in cooking utensil, be convenient for according to factors such as the type of the food of culinary art, quantity, adjust the heating power size, and then adjust the pressure change speed in the culinary art intracavity.
In the above technical scheme, the cooking appliance is an electric cooker or a pressure cooker or an electric steamer.
A third aspect of the present invention provides a cooking method for a cooking appliance according to any one of the second aspect, in which a pressure relief device of the cooking appliance includes a first temperature changing element disposed near a pressure relief opening and a second temperature changing element disposed far from the pressure relief opening, the cooking method including: when the cooking pressure in the cooking cavity of the cooking appliance is greater than the pressure threshold value, the first temperature change piece deforms to drive the pressure relief piece in the cooking appliance to move to the limiting part so as to open the pressure relief opening to relieve pressure; the second temperature change piece deforms to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset; acquiring the cycle time of the movement of the pressure relief piece between the limiting part and the pressure relief opening; and adjusting cooking parameters of the cooking appliance according to the cycle time.
In the technical scheme, when the cooking pressure in a cooking cavity of a cooking appliance is greater than a pressure threshold value, high-temperature and high-pressure air flow can push open a pressure relief piece pressed on a pressure relief opening to flush the pressure relief opening to form a high-temperature environment near the pressure relief opening, so that a first temperature change piece which is closer to the pressure relief opening or has a lower temperature change point is deformed under the action of high temperature to drive the pressure relief piece to move to a limiting part, thereby opening the pressure relief opening to relieve pressure, along with the opening of the pressure relief opening, more high-temperature and high-pressure air flow are flushed out to further raise the ambient temperature near the pressure relief opening, thereby a second temperature change piece which is farther away or has a higher temperature change point is also deformed to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset to seal the pressure relief opening, at the moment, by acquiring the cycle time of the movement of the pressure relief piece between the limiting part and the pressure relief opening, and adjusting the cooking parameters of the cooking appliance according to the cycle time, therefore, the cooking parameters such as pressure in the cooking cavity and the like are kept in a proper numerical range, and the improvement of the cooking effect, such as the softness of rice and the like, is further ensured; the cooking method only needs to obtain the circulating moving time of the pressure relief piece, adjusts cooking parameters according to the circulating time, does not need to measure parameters such as temperature and pressure, does not need to control components such as an electromagnet or an electromagnetic valve, and is simple and effective in control mode and easy to operate.
In the above technical solution, according to the cycle time, adjusting the cooking parameters of the cooking appliance specifically includes: determining the size relation between the cycle time and a time threshold; and when the cycle time is not less than the time threshold, adjusting the heating power of the cooking appliance to control the temperature in the cooking cavity not to be lower than the temperature threshold within a preset time period.
In the technical scheme, the circulation time is long, or the circulation time is not less than a time threshold, the time required for the pressure in the cooking cavity to reach the pressure threshold to jack the pressure relief piece is long, and the time for the pressure to reach the pressure threshold is long, so that the temperature is slowly increased, the temperature increasing speed can be accelerated by adjusting the heating power of the cooking appliance, and the temperature in the cooking cavity can reach the purpose of being not less than the temperature threshold within the preset time.
In above-mentioned technical scheme, take place deformation at first temperature change spare, drive the pressure release spare among the cooking utensil and remove to spacing portion after, the culinary art method still includes: and controlling the fan of the cooking appliance to operate so as to reduce the temperature of the environment where the first temperature change element is positioned.
In the technical scheme, deformation takes place at first temperature change spare, drives the pressure release spare among the cooking utensil and removes after spacing portion, reduces the temperature of the environment that first temperature change spare is located through the fan operation of control cooking utensil, is favorable to first temperature change spare to recover fast to make pressure release spare reset fast, make pressure release spare reseal the pressure release mouth, the temperature of culinary art intracavity can continue to rise.
In above-mentioned technical scheme, acquire the cycle time that the piece moved between spacing portion and pressure release opening that lets out, specifically include: determining the first time when the pressure relief piece moves from the limiting part to the pressure relief opening each time and the second time when the pressure relief piece moves from the pressure relief opening to the limiting part each time; acquiring the cycle times of the pressure relief piece between the limiting part and the pressure relief opening; and determining the cycle time according to the plurality of first times, the plurality of second times and the cycle times.
In this technical scheme, confirm cycle time according to a plurality of first time, a plurality of second time and cycle number, such cycle time is more accurate, is favorable to accurate adjustment culinary art parameter, promotes the culinary art effect.
It can be understood that, in a certain period of time, the pressure relief piece may move in a cycle between the limiting portion and the pressure relief opening for multiple times, and each cycle may have a difference between the first time and the second time along with the pressure change and the temperature change in the cooking cavity, so that an average cycle time needs to be obtained by combining the multiple first times, the multiple second times and the total cycle number, so as to be close to most cycle conditions, and thus, the cooking parameters can be accurately adjusted.
It is also noted that the cooking effect, at least, includes cooking efficiency, soft-rot degree of cooked food, and the like.
An aspect of the fourth aspect of the present invention provides a computer-readable storage medium, where a computer program is executed by a processor to implement the steps of the cooking method according to any one of the third aspects, so that the technical effects of any one of the above third aspects are achieved, and details are not repeated herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic front view of a pressure relief device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a front view of a pressure relief device according to another embodiment of the present invention;
FIG. 3 is a schematic illustration of a front view of a pressure relief device according to yet another embodiment of the present invention;
FIG. 4 is a schematic illustration of a front view of a pressure relief device according to yet another embodiment of the present invention;
FIG. 5 is a schematic flow diagram of a cooking method according to an embodiment of the invention;
FIG. 6 is a schematic flow chart of a cooking method according to another embodiment of the invention;
FIG. 7 is a schematic flow chart of a cooking method according to yet another embodiment of the invention;
FIG. 8 is a schematic flow chart of a cooking method according to yet another embodiment of the invention;
FIG. 9 is a graph showing the variation of temperature and pressure in the cooking chamber of the rice cooker according to the embodiment of the present invention;
FIG. 10 is an enlarged schematic view at A in FIG. 9;
fig. 11 is a schematic flow diagram of a cooking method according to an embodiment of the invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 4 is:
10 a seat body, 12 a pressure relief opening, 14 a pressure relief piece, 16 a first temperature change piece, 18 a second temperature change piece, 20 a fan, 22 a guide surface and 24 a limit part.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Some embodiments according to the invention are described below with reference to fig. 1 to 11.
As shown in fig. 1 to 4, a pressure relief device according to an embodiment of the present invention is used for a cooking appliance, including: the seat body 10, the pressure relief member 14, the first temperature changing element 16 and the second temperature changing element 18.
Specifically, a pressure relief channel is arranged on the seat body 10, the pressure relief channel is communicated with a cooking cavity of the cooking appliance, and a pressure relief opening 12 is formed at one end of the pressure relief channel for allowing high-temperature and high-pressure air flow in the cooking cavity to pass through; the pressure relief member 14 may be provided on the pressure relief vent 12 and may be movable relative to the pressure relief vent 12; one side of the pressure relief member 14 is provided with a first temperature changing member 16, the other side of the pressure relief member 14 is provided with a second temperature changing member 18, and the first temperature changing member 16 and the second temperature changing member 18 are used for limiting the moving path of the pressure relief member 14.
The first temperature change piece 16 deforms to drive the pressure relief piece 14 to move so as to open the pressure relief opening 12 and release high-temperature and high-pressure airflow in the cooking cavity; the second temperature changing element 18 is deformed to drive the pressure relief element 14 back to the pressure relief opening 12, so as to close the pressure relief opening 12.
In this embodiment, the first temperature-changing element 16 and the second temperature-changing element 18 limit the moving path of the pressure relief element 14, so that the pressure relief element 14 can open the pressure relief opening 12 as the first temperature-changing element 16 deforms and leaves from the pressure relief opening 12, and can also open the pressure relief opening 12 as the second temperature-changing element 18 deforms, and can return to the pressure relief opening 12 along the moving path as the pressure in the cooking cavity decreases and the temperature of the first temperature-changing element 16 recovers after pressure is relieved, so that the pressure relief opening 12 is periodically opened or closed, and the periodic change of the pressure in the cooking cavity is realized, thereby avoiding the excessive pressure in the cooking cavity, and gradually increasing the temperature in the cooking cavity to ensure the cooking effect; with this configuration, the first temperature changing element 16 and the second temperature changing element 18 are caused to deform by changes in temperature and pressure without providing a control device for controlling the operation of the components, and the pressure relief element 14 is pushed to move.
Wherein, before first temperature change 16 takes place the deformation, the pressure of culinary art intracavity constantly increases under heating device's effect, and the temperature of culinary art intracavity also constantly rises simultaneously, and when the pressure of culinary art chamber was greater than the dead weight of pressure release spare or exerted on pressure release spare with the effort of culinary art chamber pressure opposite direction, pressure release spare can be by jack-up to make the high temperature high-pressure gas of culinary art intracavity flow into in the pressure release chamber, in order to improve the temperature of the environment that first temperature change and second temperature change were located.
In some embodiments, the pressure relief channel is in direct communication with the outside atmosphere; in other embodiments, a valve cavity is formed in the seat body 10, and the pressure relief passage is communicated with the valve cavity and communicated with the outside atmosphere through the valve cavity.
In any of the above embodiments, the outer surface of the side of the relief member 14 contacting the seat body 10 is a plane or a curved surface, and further, the relief member 14 is provided in a column shape to realize movement by rolling, thereby reducing friction.
Further, the pressure relief piece 14 is arranged to be spherical, so that the pressure relief piece 14 is easily pushed by the temperature change piece 16, namely the temperature change piece can push the pressure relief piece 14 to move as long as small resistance is overcome, the difficulty of opening the pressure relief opening 12 of the pressure relief piece 14 is reduced, the spherical pressure relief piece 14 needs small pushing force, the size of the temperature change piece is favorably reduced, and the space occupied by the temperature change piece is reduced.
Furthermore, the seat body 10 is provided with a guide surface 22, the guide surface 22 is an inclined surface, and the guide surface 22 extends upwards along the direction away from the pressure relief opening 12; the first temperature changing element 16 is deformed to push the pressure relief element 14 to move along the guide surface 22 in a direction away from the first temperature changing element 16 so as to open the pressure relief opening 12; by the arrangement of the guide surface 22, the pressure relief piece 14 is facilitated to roll along the guide surface 22, rather than rolling everywhere, which causes inconvenience in resetting; the guide surface 22 extends upward to assist in the return of the ball relief 14 under the force of gravity.
In other embodiments, the guiding surface 22 provided on the seat body 10 is a plane.
On the basis of any one of the above embodiments, the moving path of the pressure relief member 14 has a first position and a second position, the first position is located at the pressure relief opening 12, the second position is provided with a limiting portion 24, the pressure relief member 14 closes the pressure relief opening 12 when in the first position, i.e., the pressure relief opening 12, and the pressure relief member 14 opens the pressure relief opening 12 when in the second position; the first temperature change piece 16 is arranged on one side of the pressure relief opening 12 far away from the pressure relief piece 14, and the first temperature change piece 16 deforms to drive the pressure relief piece 14 to move from the pressure relief opening 12 to the limiting part 24 along the guide surface 22 and open the pressure relief opening 12; the second temperature changing element 18 is disposed on one side of the limiting portion 24 away from the pressure relief element 14, and the second temperature changing element 18 deforms to drive the pressure relief element 14 to move from the limiting portion 24 to the pressure relief opening 12.
In this embodiment, the moving path of the pressure relief member 14 has a first position and a second position, which are respectively the pressure relief opening 12 and the limiting portion 24, while the first temperature changing element 16 is located at a side of the pressure relief opening 12 away from the pressure relief member 14, and the second temperature changing element 18 is located at a side of the limiting portion 24 away from the pressure relief member 14, such a structure can ensure that the pressure relief member 14 is not blocked by the first temperature changing element 16 or the second temperature changing element 18 during the moving process, and ensure that the pressure relief member 14 can freely move between the first position and the second position, thereby opening or closing the pressure relief opening 12; the limiting portion 24 is beneficial to limit the moving distance of the pressure relief member 14, and prevents the pressure relief member 14 from moving too far and being unable to return to the pressure relief opening 12.
Specifically, the first temperature changing element 16 is disposed on a side of the pressure relief opening 12 away from the pressure relief element 14, as shown in fig. 1, that is, the first temperature changing element 16 is disposed on a right side of the pressure relief opening 12, so that the first temperature changing element 16 can be deformed first when the pressure relief opening 12 is opened to push the pressure relief element 14 to move toward the limiting portion 24, and similarly, the second temperature changing element 18 is disposed on a side of the limiting portion 24 away from the pressure relief element 14, as shown in fig. 1, that is, the second temperature changing element 18 is disposed on a left side of the pressure relief opening 12, so that the second temperature changing element 16 is deformed due to a distance factor when the pressure relief opening 12 is opened to push the pressure relief element 14 to move toward the pressure relief opening 12.
In some embodiments, there is only one of the limiting portions 24, such as a groove or a stop or a dimple; in other embodiments, the position-limiting portion 24 is a plurality of, for example, a plurality of stoppers, or a plurality of grooves or a plurality of pits.
In any of the above embodiments, in the end face direction of the pressure relief opening 12, the distance from the first temperature changing element 16 to the adjacent edge of the pressure relief opening 12 is smaller than the distance from the second temperature changing element 18 to the adjacent edge of the pressure relief opening 12, so that the temperature of the environment where the first temperature changing element 16 and the second temperature changing element 18 are located may be different, since the first temperature changing element 16 is closer to the pressure relief opening 12, the ambient temperature may reach a higher temperature first, and under the condition that the first temperature changing element 16 and the second temperature changing element 18 are made of the same temperature changing material, the first temperature changing element 16 deforms before the second temperature changing element 18, and after the pressure relief element 14 is pushed to move to the limiting portion 24, the second temperature changing element 18 deforms to push the pressure relief element 14 to move and reset.
In other embodiments, the first temperature varying element 16 is spaced less from the center of the pressure relief vent 12 than the second temperature varying element 18 is spaced from the center of the pressure relief vent 12.
In other embodiments, the temperature-change materials used for the first temperature-change element 16 and the second temperature-change element 18 are different, so that the deformation temperatures of the first temperature-change element 16 and the second temperature-change element 18 are different, and preferably, the deformation temperature of the first temperature-change element 16 is lower, so that the first temperature-change element 16 can deform before the second temperature-change element 18.
In any of the above embodiments, the first temperature changing element 16 includes a first temperature changing layer and a second temperature changing layer bonded together, the first temperature changing layer is disposed on a side of the second temperature changing layer adjacent to the pressure relief member 14, wherein when the first temperature changing element 16 deforms, the amount of deformation of the first temperature changing layer is less than the amount of deformation of the second temperature changing layer, and the temperature changing element deforms in a direction toward the pressure relief member 14.
In other embodiments, other structures are disposed between the first temperature change layer and the second temperature change layer to make the connection.
Further, the second temperature changing element 18 includes a third temperature changing layer and a fourth temperature changing layer which are attached together, the third temperature changing layer is disposed on one side of the fourth temperature changing layer close to the pressure relief member 14, wherein when the second temperature changing element 18 deforms, the deformation amount of the third temperature changing layer is smaller than that of the fourth temperature changing layer, and the second temperature changing element 18 deforms along the direction toward the pressure relief member 14.
In other embodiments, other structures are disposed between the third temperature-change layer and the fourth temperature-change layer for connection.
In another embodiment, the pressure relief member 14 is a sheet, and the seat body 10 of the pressure relief device is provided with a support portion on which the pressure relief member 14 can rotate, specifically, the first temperature changing member 16 is deformed to drive the pressure relief member 14 to rotate to a first position to open the pressure relief opening 12, and the second temperature changing member 18 is deformed to drive the pressure relief member 14 to rotate to a second position to close the pressure relief opening 12.
In another embodiment, the pressure relief device further comprises: the valve cover is detachably connected with the seat body 10, and a pressure relief cavity is formed inside the valve cover and the seat body 10 after the valve cover is connected with the seat body; one end of the elastic part is connected with the inner wall of the valve cover, and the other end of the elastic part is fixedly connected with the pressure relief piece 14 and tightly presses the pressure relief piece 14 to the pressure relief opening 12; the first temperature change part 16 and the second temperature change part 18 are not deformed, the elastic part is in a compression state, the first temperature change part 16 is deformed, the pressure relief part 14 is pushed to be far away from the pressure relief opening 12, and the pressure relief part 14 is reset under the elastic force action of the elastic part and the deformation action of the second temperature change part 18.
Unlike the above embodiments, in another embodiment, one end of the elastic member is connected to the inner wall of the housing 10.
In yet another embodiment, one end of the elastic member is connected to the pressure relief channel, and the other end is connected to the pressure relief member 14, and when the pressure relief member 14 is on the pressure relief opening 12, the elastic member is in a free state or a stretched state; when the pressure value in the cooking cavity reaches the pressure threshold value, the pressure relief piece 14 is pushed to open the pressure relief opening 12, meanwhile, the first temperature change piece 16 deforms to push the pressure relief piece 14, the second temperature change piece 18 deforms to push the pressure relief piece 14, and the pressure relief piece 14 resets under the elastic action of the second temperature change piece 18 and the elastic piece.
In any of the above embodiments, at least one water leakage hole is formed in the bottom wall of the seat body 10, one end of the water leakage hole is connected with the pressure release cavity, and the other end of the water leakage hole is connected to a space outside the cooking cavity, such as a water discharge cavity, the water discharge cavity is independently arranged with the cooking cavity, so that water drops in the pressure release cavity can be discharged to the water discharge cavity through the water leakage hole, the water brought out when the pressure release is stored in the water discharge cavity, and the water is prevented from overflowing and scattering all around to cause pollution.
Further, in any of the above embodiments, the pressure relief device further comprises: the fan 20 is used as a cooling device and is arranged corresponding to the first temperature changing element 16, and the fan 20 is used for reducing the temperature of the environment where the first temperature changing element 16 is located, so that the environmental temperature is conveniently and rapidly reduced, the deformation recovery of the first temperature changing element 16 is accelerated, the resetting of the pressure relief element 14 is convenient, and the pressure relief element 14 is enabled to close the pressure relief opening 12 again.
In other embodiments, a natural ventilator or condenser may be used as a cooling device in place of the fan 20 to cool the first temperature changing element or the environment in which it is located.
It should be noted that the natural ventilator realizes natural ventilation by the difference between the internal pressure and the external pressure, and has simple structure and easy production and installation.
Embodiments of a second aspect of the present invention provide a cooking appliance, including a pot body and an upper cover that are fastened to each other, and a pressure relief device as described in any one of the embodiments of the first aspect; the cooker body and the upper cover are buckled to form a cooking cavity, and the pressure relief device is arranged in the upper cover.
In this embodiment, the pressure relief device according to any one of the above embodiments is provided in the cooking appliance, so that all the beneficial effects of the above embodiments are achieved, and details are not described herein.
In the above-mentioned embodiment, for articulated between the a kind of deep pot body and the upper cover, pressure release resets and pushes down the pressure release mouth when the upper cover is opened to there is high temperature high pressure air current to flow from the pressure release mouth and scald the user of opening the upper cover when avoiding the upper cover to open, promoted the security that cooking utensil used.
In any of the above embodiments, the cooking appliance includes a heating device with adjustable power, so as to adjust the pressure change speed in the cooking cavity by adjusting the heating power.
In the above embodiments, the cooking appliance is an electric cooker, a pressure cooker or an electric steamer.
An embodiment of a third aspect of the present invention provides a cooking method for the cooking appliance in any one of the above second aspects, as shown in fig. 5, in which the pressure relief device in the cooking appliance includes a first temperature-changing element disposed near the pressure relief opening and a second temperature-changing element disposed far from the pressure relief opening, and the cooking method includes:
step S100: when the cooking pressure in the cooking cavity of the cooking appliance is greater than the pressure threshold value, the first temperature change piece deforms to drive the pressure relief piece in the cooking appliance to move to the limiting part so as to open the pressure relief opening to relieve pressure;
step S102: the second temperature change piece deforms to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset;
step S104: acquiring the cycle time of the movement of the pressure relief piece between the limiting part and the pressure relief opening;
step S106: and adjusting cooking parameters of the cooking appliance according to the cycle time.
In this embodiment, when the cooking pressure in the cooking cavity of the cooking appliance is greater than the pressure threshold, the high-temperature and high-pressure airflow can push open the pressure relief piece pressed on the pressure relief opening, and flush out the pressure relief opening, so that a high-temperature environment is formed near the pressure relief opening, and a first temperature change piece which is closer to the pressure relief opening or has a lower temperature change point deforms under the action of high temperature, and drives the pressure relief piece to move to the limiting part, so that the pressure relief opening is opened for pressure relief, and along with the opening of the pressure relief opening, more high-temperature and high-pressure airflow flushes out, so that the ambient temperature near the pressure relief opening is further raised, and a second temperature change piece which is farther away or has a higher temperature change point also deforms, and drives the pressure relief piece to move from the limiting part to the pressure relief opening for resetting, so as to close the pressure relief opening, at this time, by obtaining the cycle time of the pressure relief piece moving between the limiting part and the pressure relief opening, and adjusting the cooking parameters of the cooking appliance according to the cycle time, therefore, the cooking parameters such as pressure in the cooking cavity and the like are kept in a proper numerical range, and the improvement of the cooking effect, such as the softness of rice and the like, is further ensured; the cooking method only needs to obtain the circulating moving time of the pressure relief piece, adjusts cooking parameters according to the circulating time, does not need to measure parameters such as temperature and pressure, does not need to control components such as an electromagnet or an electromagnetic valve, and is simple and effective in control mode and easy to operate.
In another embodiment, as shown in fig. 6, a cooking method includes:
step S200: when the cooking pressure in the cooking cavity of the cooking appliance is greater than a pressure threshold value, the first temperature change piece deforms to drive the pressure relief piece in the cooking appliance to move to the limiting part so as to open the pressure relief opening to relieve pressure;
step S202: the second temperature change piece deforms to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset;
step S204: acquiring the cycle time of the movement of the pressure relief piece between the limiting part and the pressure relief opening;
step S206: determining the size relation between the cycle time and a time threshold;
step S208: and when the cycle time is not less than the time threshold, adjusting the heating power of the cooking appliance to control the temperature in the cooking cavity not to be lower than the temperature threshold within a preset time period.
In this embodiment, when the cycle time is not less than the time threshold, it indicates that the time required for the pressure in the cooking cavity to reach the pressure threshold to jack the pressure relief member is long, and the time for the pressure to reach the pressure threshold is long, it indicates that the temperature rises slowly, so that the temperature rising speed can be accelerated by adjusting the heating power of the cooking appliance, and the purpose that the temperature in the cooking cavity can reach not less than the temperature threshold within the preset time period is ensured.
In another embodiment, as shown in fig. 7, the cooking method further includes:
step S300: when the cooking pressure in the cooking cavity of the cooking appliance is greater than a pressure threshold value, the first temperature change piece deforms to drive the pressure relief piece in the cooking appliance to move to the limiting part so as to open the pressure relief opening to relieve pressure;
step S302: controlling a fan of the cooking appliance to operate so as to reduce the temperature of the environment where the first temperature change element is located;
step S304: the second temperature change piece deforms to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset;
step S306: acquiring the cycle time of the movement of the pressure relief piece between the limiting part and the pressure relief opening;
step S308: and adjusting cooking parameters of the cooking appliance according to the cycle time.
In the above embodiment, take place deformation at first temperature change spare, drive the pressure release spare among the cooking utensil and remove to spacing portion after, reduce the temperature of the environment that first temperature change spare is located through the fan operation of control cooking utensil, be favorable to first temperature change spare to recover fast to make pressure release spare reset fast, make pressure release spare reseal the pressure release mouth, the temperature in the culinary art intracavity can continue to rise.
In another embodiment, as shown in fig. 8, the cooking method further includes:
step S400: when the cooking pressure in the cooking cavity of the cooking appliance is greater than the pressure threshold value, the first temperature change piece deforms to drive the pressure relief piece in the cooking appliance to move to the limiting part so as to open the pressure relief opening to relieve pressure; step S402: the second temperature change piece deforms to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset; step S404: determining the first time when the pressure relief piece moves from the limiting part to the pressure relief opening each time and the second time when the pressure relief piece moves from the pressure relief opening to the limiting part each time; step S406: acquiring the cycle times of the pressure relief piece between the limiting part and the pressure relief opening; step S408: determining a cycle time according to the plurality of first times, the plurality of second times and the cycle times; step S410: and adjusting cooking parameters of the cooking appliance according to the cycle time.
Yet another embodiment of the present invention provides a computer-readable storage medium, and a computer program is executed by a processor to implement the steps of the cooking method according to any one of the above embodiments, so that the technical effects of any one of the above embodiments are achieved, and are not described herein again.
According to the pressure relief device of an embodiment of the present application, as shown in fig. 1 to 4, the cover body has a pressure relief part 14, a seat body 10, a pressure relief channel, a pressure relief opening 12, a first temperature change part 16 and a second temperature change part 18, where the temperature change parts may be memory alloy, and in this embodiment, the first temperature change part and the second temperature change part are formed by two temperature change layers.
The method for changing the temperature and pressure in the cooking cavity is shown in fig. 9 and fig. 10, in the first stage, the pressure relief piece is positioned on the pressure relief opening to seal the pressure relief channel, at the moment, the pressure in the cooker gradually rises, when the pressure increases to push the pressure relief piece away, high-temperature steam flows into the pressure relief cavity, at the moment, the gas flowing into the pressure relief cavity can deform the first temperature change piece to push the small balls away, at the moment, the second stage is entered, in the second stage, the heating in the cooker is controlled to stop, the pressure in the cooker is further reduced until the second temperature change piece deforms, the third stage is entered, the pressure relief piece is moved to the pressure relief opening under the action of the second temperature change piece, at the moment, the cooker is not heated, but the pressure in the cooker slowly rises due to certain heat retained in the cooker, after the first temperature change piece is cooled and reset, the heating in the cooker is controlled to enter the next period.
The following table also shows the boiling point of water versus the pressure value.
TABLE.1: corresponding relation between boiling point and air pressure value of water
Pressure value P/(one standard atmospheric pressure atm) Boiling temperature T/(degree centigrade degree C.)
1.0 100
1.1 102.4
1.2 104.8
1.3 107.3
1.4 109.7
1.5 111.6
1.6 113.4
1.7 115.3
Fig. 11 shows a flow diagram of a cooking process. The method comprises the following specific steps:
step S500, starting cooking;
step S502, constant temperature water absorption is carried out for a set time;
step S504, heating to boiling rapidly to enable the pressure in the cooker to rise, when the pressure in the cooker reaches a set pressure p1, the pressure relief piece starts to leak air and relieve the pressure, and the leaked high-temperature steam starts to heat the first temperature change piece to cause the first temperature change piece to be heated and deformed, so that the pressure relief piece is pushed away;
s506, stopping heating the inner pot, enabling the second temperature changing piece to deform due to the continuously leaked high temperature, rebounding the pressure relief piece to reset, heating the air pressure of the inner pot again after resetting, counting the next cycle, and entering the next stage after reaching the set cycle time or time;
step S508, entering a stewing stage, adjusting the heating power to keep the steam environment in the pot at more than 90 ℃, and ending after the set time is continued.
As shown in fig. 1, when the pressure is below the pressure threshold, the pressure relief member 14 blocks at the pressure relief port 12; when the set nominal pressure or pressure threshold is reached, as shown in fig. 2, the pressure relief member 14 is pushed open by the pressure to start air leakage, and the hot steam in the pan causes the first temperature change member 16 to deform to spring open the pressure relief member 14.
As shown in fig. 3, as the temperature rises, the temperature of the second temperature-variable component 18 also gradually reaches the deformation temperature, and then the pressure relief component 14 is rebounded to the original position, but at this time, the first temperature-variable component 16 is not restored, and the pressure relief component 14 cannot return to the pressure relief opening 12; at this time, the heating and the pressure relief are stopped, and the fan 20 is started to blow air to the first temperature changing element 16, or the first temperature changing element 16 is cooled and restored to the initial state through natural cooling.
As shown in fig. 4, the first temperature changing element 16 is restored after cooling, and the pressure relief element 14 returns to the pressure relief port 12 under the action of gravity. Then the rice is heated again, and the next period is started, so that the pressure in the cooker is variable, and the rice is softer.
The technical scheme of the invention is described in detail in the above with reference to the attached drawings, and by the technical scheme of the invention, the pressure relief device of the cooking appliance is effectively simplified, the number of parts is reduced, the control program of pressure relief is simplified, and the structure is simple and easy to maintain.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (19)

1. A pressure relief device for a cooking appliance, comprising:
the base body is provided with a pressure relief channel communicated with a cooking cavity of the cooking appliance, and one end of the pressure relief channel forms a pressure relief opening;
the pressure relief piece is movably arranged on the pressure relief opening;
a first temperature changing member and a second temperature changing member respectively provided at opposite sides of the pressure relief member to restrict a movement path of the pressure relief member by the first temperature changing member and the second temperature changing member,
the first temperature change piece can drive the pressure relief piece to open the pressure relief opening through deformation, and the second temperature change piece can drive the pressure relief piece to close the pressure relief opening through deformation;
the seat body is provided with a guide surface which is inclined upwards along the direction far away from the pressure relief opening, and the first temperature change piece can be deformed so as to enable the pressure relief piece to move along the guide surface to open the pressure relief opening;
the limiting part is arranged on the seat body, and the first temperature change piece can deform so that the pressure relief piece can move into the limiting part along the guide surface.
2. The pressure relief device according to claim 1, wherein said pressure relief opening and said limiting portion are respectively a first position and a second position of said moving path, said first temperature varying element is disposed on a side of said pressure relief opening away from said pressure relief member, said second temperature varying element is disposed on a side of said limiting portion away from said pressure relief member,
the pressure relief piece is positioned on the pressure relief opening, and the first temperature change piece can drive the pressure relief piece to move to the second position from the pressure relief opening through deformation; the pressure relief piece is located on the limiting portion, and the second temperature change piece can drive the pressure relief piece to move to the first position from the limiting portion through deformation.
3. The pressure relief device according to claim 1, wherein said first temperature varying element and said second temperature varying element are at different distances from said pressure relief port in a direction of an end surface of said pressure relief port.
4. The pressure relief device according to claim 1, wherein said first temperature change element comprises in particular:
the first temperature change layer and the second temperature change layer are arranged on one side of the first temperature change layer far away from the pressure relief piece,
when the first temperature change piece deforms, the deformation amount of the second temperature change layer is larger than that of the first temperature change layer, and the first temperature change piece deforms along the direction towards the pressure relief piece.
5. The pressure relief device according to claim 1, wherein said second temperature-varying element comprises in particular:
a third temperature change layer and a fourth temperature change layer, wherein the fourth temperature change layer is arranged on one side of the third temperature change layer far away from the pressure relief piece,
when the second temperature change piece deforms, the deformation amount of the fourth temperature change layer is larger than that of the third temperature change layer, and the second temperature change piece deforms along the direction towards the pressure relief piece.
6. The pressure relief device according to claim 1, wherein said first temperature change member and said second temperature change member have different deformation temperatures.
7. The pressure relief device of claim 1, wherein the pressure relief member is in the form of a flap, the pressure relief device further comprising:
a support part arranged on the seat body, wherein the pressure relief piece can rotate on the support part to open or close the pressure relief opening,
wherein, first temperature change piece can drive through deformation pressure release piece rotates in order to open the pressure release mouth, second temperature change piece can drive through deformation pressure release piece rotates in order to seal the pressure release mouth.
8. The pressure relief device of claim 7, further comprising:
the valve cover is detachably connected with the base body, and a pressure relief cavity is formed in the valve cover after the valve cover is connected with the base body;
the elastic piece, the one end fixed connection of elastic piece in the inner wall in pressure release chamber, the other end with pressure release fixed connection, the elastic piece can make pressure release press to the pressure release mouth.
9. The pressure relief device according to claim 8, wherein at least one water leakage hole is formed on the bottom wall of the seat body, one end of the water leakage hole is connected to the pressure relief cavity, and the other end of the water leakage hole is connected to the space outside the cooking cavity, so that water in the pressure relief cavity is discharged to the space outside the cooking cavity through the water leakage hole.
10. The pressure relief device of claim 1, further comprising:
the cooling device is arranged corresponding to the first temperature-changing piece and used for reducing the temperature of the environment where the first temperature-changing piece is located and/or reducing the temperature of the first temperature-changing piece when the cooling device is operated.
11. A cooking appliance, comprising:
a pot body;
the upper cover is buckled with the cooker body to form a cooking cavity, and the pressure relief device as claimed in any one of claims 1 to 10 is arranged in the upper cover.
12. The cooking appliance of claim 11,
the upper cover is hinged with the cooker body, and the pressure relief piece resets to press the pressure relief opening when the upper cover is opened.
13. The cooking appliance of claim 11 or 12,
the cooking appliance comprises a heating device with adjustable power.
14. The cooking appliance of claim 11 or 12,
the cooking utensil is an electric cooker or a pressure cooker or an electric steamer.
15. A cooking method for the cooking appliance according to any one of claims 11 to 14, wherein the pressure relief device in the cooking appliance comprises a first temperature-changing element disposed proximate to the pressure relief opening and a second temperature-changing element disposed distal to the pressure relief opening, the cooking method comprising:
when the cooking pressure in the cooking cavity of the cooking appliance is greater than a pressure threshold value, the first temperature change piece deforms to drive the pressure relief piece in the cooking appliance to move to the limiting part so as to open the pressure relief opening for pressure relief;
the second temperature change piece deforms to drive the pressure relief piece to move from the limiting part to the pressure relief opening to reset;
acquiring the cycle time of the movement of the pressure relief piece between the limiting part and the pressure relief opening;
adjusting a cooking parameter of the cooking appliance according to the cycle time.
16. The cooking method according to claim 15, wherein the adjusting the cooking parameters of the cooking appliance according to the cycle time specifically comprises:
determining a magnitude relationship of the cycle time to a time threshold;
and when the cycle time is not less than the time threshold, adjusting the heating power of the cooking appliance so as to control the temperature in the cooking cavity to be not lower than the temperature threshold within a preset time period.
17. The cooking method according to claim 15, wherein after the first temperature changing element deforms to drive the pressure relief element in the cooking appliance to move to the limiting part, the cooking method further comprises:
and controlling the fan of the cooking appliance to operate so as to reduce the temperature of the environment where the first temperature change element is located.
18. The cooking method according to claim 15, wherein the obtaining of the cycle time of the movement of the pressure relief piece between the limiting portion and the pressure relief opening specifically comprises:
determining first time when the pressure relief piece moves from the limiting part to the pressure relief opening each time and second time when the pressure relief piece moves from the pressure relief opening to the limiting part each time;
acquiring the cycle times of the pressure relief piece between the limiting part and the pressure relief opening;
determining the cycle time according to the plurality of first times, the plurality of second times and the cycle times.
19. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the cooking method according to any one of claims 15 to 18.
CN201910816944.9A 2019-08-30 2019-08-30 Pressure relief device, cooking appliance, cooking method, and computer-readable storage medium Active CN112438587B (en)

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Publication number Priority date Publication date Assignee Title
JPH10304974A (en) * 1997-05-09 1998-11-17 Sanyo Electric Co Ltd Pressure cooker
CN201139426Y (en) * 2007-12-12 2008-10-29 佛山市顺德区爱德电器有限公司 Bimetallic strip temperature control valve
CN204427785U (en) * 2015-02-13 2015-07-01 佛山市顺德区美的电热电器制造有限公司 Steam valve and cooking apparatus
CN106461102A (en) * 2014-04-08 2017-02-22 伍德沃德有限公司 Cryogenic check valve
CN207755034U (en) * 2017-07-21 2018-08-24 九阳股份有限公司 A kind of micro-pressure electric rice cooker
CN208957800U (en) * 2018-06-12 2019-06-11 广东伊莱特电器有限公司 A kind of automatic temperature-controlled steam valve of swing type
CN209252443U (en) * 2018-06-12 2019-08-16 广东伊莱特电器有限公司 A kind of automatic pressure-controlled electric cooker of slidingtype

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10304974A (en) * 1997-05-09 1998-11-17 Sanyo Electric Co Ltd Pressure cooker
CN201139426Y (en) * 2007-12-12 2008-10-29 佛山市顺德区爱德电器有限公司 Bimetallic strip temperature control valve
CN106461102A (en) * 2014-04-08 2017-02-22 伍德沃德有限公司 Cryogenic check valve
CN204427785U (en) * 2015-02-13 2015-07-01 佛山市顺德区美的电热电器制造有限公司 Steam valve and cooking apparatus
CN207755034U (en) * 2017-07-21 2018-08-24 九阳股份有限公司 A kind of micro-pressure electric rice cooker
CN208957800U (en) * 2018-06-12 2019-06-11 广东伊莱特电器有限公司 A kind of automatic temperature-controlled steam valve of swing type
CN209252443U (en) * 2018-06-12 2019-08-16 广东伊莱特电器有限公司 A kind of automatic pressure-controlled electric cooker of slidingtype

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