CN210673073U

CN210673073U - Cooking utensil

Info

Publication number: CN210673073U
Application number: CN201920858004.1U
Authority: CN
Inventors: 罗飞龙; 刘化勇; 吴育权; 朱传斌; 梁志佳; 邢胜华; 黄韦铭; 严若飞; 瞿月红
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-06-05
Anticipated expiration: 2029-06-06

Abstract

The utility model discloses a cooking utensil, include: a lid assembly having a vent adapted to communicate with a cooking cavity of a cooking appliance; the negative pressure device is suitable for enabling the cooking cavity to form a negative pressure state; and the non-return device comprises an air inlet channel, a moving part and an air outlet channel, the air inlet channel is communicated with the air vent, the moving part is positioned between the air inlet channel and the air outlet channel, and the moving part enables the air inlet channel to be communicated with the air outlet channel in a one-way mode or closed and communicated with the air outlet channel according to the control of the negative pressure device. According to the utility model discloses cooking utensil is through setting up the non return device for gas in the culinary art intracavity can one-way flow, and can realize one-way effect that switches on through the switching of moving part, has saved the solenoid valve, has both reduced manufacturing cost, has avoided high temperature humid environment to produce bad influence to the non return device again, thereby has improved cooking utensil overall structure's life, and user experience is good.

Description

Cooking utensil

Technical Field

The utility model relates to a life electrical apparatus technical field particularly, relates to a cooking utensil.

Background

Among the prior art, vacuum rice cooker sets up air exhaust device usually to bleed to the culinary art chamber and make the culinary art intracavity form the negative pressure state, thereby promote to absorb water and keep warm etc. air exhaust device mainly comprises aspiration pump and solenoid valve, and the solenoid valve setting is between exhaust tube and culinary art chamber for open and close the air bleed passageway. However, since the solenoid valve belongs to an electronic component, the solenoid valve is easily affected by high temperature when being installed in the upper cover, which results in a reduction in the service life of the solenoid valve and thus in an increase in the cost of the electric cooker, and there is room for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a cooking appliance, which has a long service life and a low cost.

According to the utility model discloses cooking utensil includes: a lid assembly having a vent adapted to communicate with a cooking cavity of a cooking appliance; negative pressure means adapted to create a negative pressure condition within the cooking cavity; the non-return device comprises an air inlet channel, a moving part and an air outlet channel, the air inlet channel is communicated with the air vent, the moving part is positioned between the air inlet channel and the air outlet channel, and the moving part enables the air inlet channel to be communicated with the air outlet channel in a one-way mode or closed and communicated with the air outlet channel according to the control of the negative pressure device.

According to the cooking appliance provided by the embodiment of the utility model, the gas in the cooking cavity can flow to the outside of the cooking cavity in one way by arranging the non-return device; and through set up the moving part between inlet channel and outlet channel to the switching activity through the moving part can realize the effect of one-way conduction between inlet channel and the outlet channel, has saved the solenoid valve, has both reduced manufacturing cost, has avoided high temperature humid environment to produce harmful effects to non return device again, and then has improved cooking utensil overall structure's life, improves the market competitiveness of product, and user experience is good.

According to the utility model discloses cooking utensil, negative pressure device is air exhaust device, air exhaust device be suitable for with the air vent is connected so that form the negative pressure state in the culinary art intracavity, wherein, air outlet channel with air exhaust device's import intercommunication.

According to the utility model discloses cooking utensil, inlet channel includes first inlet channel and the second inlet channel that communicates each other, outlet channel include with the first outlet channel that first inlet channel corresponds and with the second outlet channel that the second inlet channel corresponds, wherein, the moving part includes first moving part and second moving part, first moving part is located first inlet channel with between the first outlet channel, the second moving part is located the second inlet channel with between the second outlet channel.

According to the utility model discloses cooking utensil, non return device still is equipped with the pressure release passageway, the one end of pressure release passageway with inlet channel intercommunication, the other end of pressure release passageway is suitable for and communicates with the outside air.

Optionally, the method further comprises: the positive pressure protection valve, the pressure release passageway passes through positive pressure protection valve and outside air intercommunication, the positive pressure protection valve is constructed into atmospheric pressure in the pressure release passageway reaches the intercommunication with the outside air under the state of predetermineeing atmospheric pressure in the pressure release passageway is less than with outside air disconnection under the state of predetermineeing atmospheric pressure.

Specifically, the positive pressure protection valve has the exhaust chamber, be equipped with mobilizable shutoff piece in the exhaust chamber, shutoff piece is used for control pressure release passageway and outside air's intercommunication and disconnection.

Specifically, the positive pressure protection valve includes: the plugging piece is arranged at one end of the valve rod, and the side peripheral wall of the valve rod is provided with an outward convex annular boss; the cover is located the elastic component in the valve rod outside, the elastic component respectively with annular boss with the inner wall in exhaust chamber ends to, the malleation protection valve still has the gas vent with the outside air intercommunication.

According to the utility model discloses cooking utensil, the moving part includes: the valve core is movably arranged in the non-return device, and one end of the valve core is used for opening and closing an outlet of the air inlet channel; and the resetting piece is connected between the valve core and the inner wall of the check device opposite to the outlet of the air inlet channel.

Optionally, the side peripheral wall of the valve core is provided with a support table protruding outwards, the valve core is sleeved with the resetting piece, one end of the resetting piece abuts against the support table, and the other end of the resetting piece abuts against the inner wall of the non-return device.

Furthermore, the inner wall of the non-return device is provided with an annular limiting rib, the annular limiting rib is opposite to the outlet of the air inlet channel, the other end of the valve core is inserted into the inner side of the annular limiting rib, and the reset piece is sleeved on the outer side of the annular limiting rib.

Specifically, the peripheral wall of one end side of the valve core is provided with an annular groove extending along the circumferential direction of the valve core, so that one end of the valve core forms a clamping head, and a sealing element is clamped on the clamping head.

According to the utility model discloses cooking utensil, the moving part forms the sealed diaphragm that has the gas port, sealed diaphragm opens or the shutoff through deformation the gas port is so that inlet channel with outlet channel intercommunication or disconnection.

Optionally, the inner wall of the non-return device has an annular projection surrounding the outlet of the inlet passage against which the sealing diaphragm abuts in the condition in which the non-return device is switched to the off-state.

Optionally, the air passing port is multiple, and the air passing ports are arranged at intervals along the circumferential direction of the outlet of the air inlet channel.

According to the utility model discloses cooking utensil, be injectd in the non return device with inlet channel's export and with the air cavity of crossing of outlet channel's import intercommunication, the moving part is located cross the air cavity in, be used for the switching inlet channel's export is with control inlet channel's export with break-make between outlet channel's the import.

Specifically, the check device includes: the base is provided with at least one air inlet channel; the first valve cover is arranged on the base, at least one part of the air passing cavity is defined between the first valve cover and the base, and at least one air outlet channel is arranged on the first valve cover.

Further, one of the base and the first valve cover is provided with a clamping groove, the other of the base and the first valve cover is provided with a clamping hook, and the clamping hook is matched with the clamping groove to clamp the base and the first valve cover.

Further, the check device further includes: the second valve cover is arranged on the base, the other part of the air passing cavity is defined between the second valve cover and the base, and the at least one air outlet channel is arranged on the second valve cover.

According to the utility model discloses cooking utensil, the pot cover subassembly includes: the inner cup with establish the orientation of inner cup the apron of culinary art chamber one side, the air vent is located the apron, the inner cup has the exhaust hole that is suitable for with the outside air intercommunication, air exhaust device's export with exhaust hole connects.

Specifically, the aperture of the exhaust hole is 1mm-5 mm.

Further, an exhaust joint is arranged on the upper surface of the inner cover, the exhaust joint defines the exhaust hole, reinforcing ribs connected with the exhaust joint are further arranged on the inner cover, the upper end surfaces of the reinforcing ribs are lower than the upper end surfaces of the exhaust joint, the reinforcing ribs comprise a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged at intervals along the circumferential direction of the exhaust joint; or the periphery of the inner cover is provided with a blocking rib protruding out of the upper surface of the inner cover, the upper end surface of the blocking rib is lower than the upper end surface of the exhaust connector, and the height between the upper end surface of the blocking rib and the upper end surface of the exhaust connector is 5-20 mm; or the inner cover is also provided with an air passing hole which is suitable for being communicated with the outside air, and the cooking appliance also comprises an on-off valve which is used for controlling the on-off of an air path between the air passing hole and the cooking cavity; the aperture of the air passing hole is 1mm-5 mm; the inner cup upper surface has the gas joint, the gas joint is injectd the gas pocket of crossing, the structure of crossing the gas joint with the structure of exhaust connects the same.

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

Drawings

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

fig. 1 is a partial schematic structural view of a cooking appliance according to an embodiment of the present invention;

fig. 2 is a partial exploded view of a cooking appliance according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is an enlarged view of the structure B of FIG. 3;

fig. 5 is a schematic structural view of a no-return device according to an embodiment of the present invention;

fig. 6 is an exploded view of a no-back device according to an embodiment of the present invention;

fig. 7 is a schematic view of a no-back device according to another embodiment of the present invention;

fig. 8 is a schematic structural view of a sealing diaphragm according to an embodiment of the present invention;

fig. 9 is a schematic view of a no-back device according to yet another embodiment of the present invention;

fig. 10 is a partial structural view of a cooking appliance according to another embodiment of the present invention;

fig. 11 is a schematic view of a non-return device according to yet another embodiment of the present invention;

fig. 12 is an exploded view of a no-back device according to yet another embodiment of the present invention;

fig. 13 is a schematic structural view of a positive pressure protection valve according to an embodiment of the present invention;

figure 14 is a top view of a positive pressure protection valve according to an embodiment of the present invention;

figure 15 is a schematic view of a partial structure of a lid assembly according to an embodiment of the present invention;

figure 16 is a schematic structural view of a lid assembly according to an embodiment of the present invention;

FIG. 17 is an enlarged view of the structure C of FIG. 16;

fig. 18 is a side view of an inner lid according to an embodiment of the invention.

Reference numerals:

the cooking appliance 100 is provided with a cooking unit,

the cooker cover assembly 10, the inner cover 101, the cover plate 102, the vent holes 11, the exhaust holes 12, the exhaust connectors 13, the reinforcing ribs 14, the blocking ribs 15, the air passing holes 16, the air passing connectors 17, the steam holes 18,

the negative pressure device (20) is provided with a negative pressure device,

the check device 30, the base 301, the slot 3011, the first valve cover 302, the hook 3021, the lug 3022, the fixing hole 3023, the annular positioning portion 3024, the second valve cover 303, the air passing cavity 304, the sealing ring 305,

a first movable member 31, a first air inlet passage 311, a first air outlet passage 312, a second movable member 32, a second air inlet passage 321, a second air outlet passage 322, a pressure relief passage 33,

the valve core 34, the support platform 341, the annular groove 342, the sealing element 343, the reset element 35, the annular limiting rib 36,

a sealing diaphragm 37, a gas passing opening 371, an annular projection 38,

a positive pressure protection valve 40, an exhaust cavity 401, a blocking piece 41, a valve rod 42, an annular boss 421, an elastic piece 43, an exhaust port 44, a valve seat 45, a valve cover 46, a fixing part 461,

the sealing ring 50, the air passing channel 501, the first annular sealing rib 51, the second annular sealing rib 52,

a connecting tube 60.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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

A cooking appliance 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings, wherein the cooking appliance 100 may be an electric rice cooker, an electric pressure cooker, or the like, and the cooking appliance has a pot body defining a cooking cavity.

As shown in fig. 1 to 3, a cooking appliance 100 according to an embodiment of the present invention includes: a pot cover assembly 10, a negative pressure device 20 and a non-return device 30.

The lid assembly 10 has a vent hole 11 adapted to communicate with a cooking cavity of the cooking appliance, and a negative pressure device 20 for creating a negative pressure state in the cooking cavity.

The non-return device 30 comprises an air inlet channel, a moving part and an air outlet channel, wherein the air inlet channel is communicated with the air vent 11, the air outlet channel is communicated with the negative pressure device 20, the moving part is positioned between the air inlet channel and the air outlet channel, the moving part can communicate the air inlet channel with the air outlet channel in a single direction or close the communication of the air inlet channel and the air outlet channel according to the control of the negative pressure device 20, wherein the single direction communication refers to: the communication between the air inlet channel and the air outlet channel is one-way, and the air in the air outlet channel can not enter the air inlet channel all the time only when the air flows from the air inlet channel to the air outlet channel.

According to the cooking appliance 100 of the embodiment of the present invention, by providing the check device 30, the gas in the cooking cavity can flow to the outside of the cooking cavity in one direction; and through set up the moving part between inlet channel and outlet channel to the effect that can realize one-way conduction through the switching of moving part has saved the solenoid valve, has both reduced manufacturing cost, can avoid again that high temperature humid environment produces adverse effect to non return device 30, thereby has improved cooking utensil 100 overall structure's life, improves the market competitiveness of product, and user experience is good.

In some examples, the check device 30 has a plurality of inlet channels and a plurality of outlet channels, and a movable member is switchable between an on state and an off state of the check device 30, the movable member being located between an outlet of at least one of the inlet channels and an inlet of at least one of the outlet channels, the movable member being configured to: the switching to the conducting state is performed only under the condition that the air flow flows from the air inlet channel (i.e. the air inlet channel with the movable member) to the non-return device 30, so that the outlet of the air inlet channel (i.e. the air inlet channel with the movable member) and the inlet of the air outlet channel (i.e. the air outlet channel with the movable member) can be communicated, and the outlet of the air inlet channel (i.e. the air inlet channel with the movable member) and the inlet of the air outlet channel (i.e. the air outlet channel with the movable member) are not communicated under the condition of the non-return device 30 in the disconnecting state.

Further, the outlet of at least one air outlet channel is communicated with the negative pressure device 20, and the air flow between the negative pressure device 20 and the vent hole 11 can be conducted under the condition that the check device 30 is in a conducting state; with the non-return means 30 in the off-state, the on-off of the air flow between the negative pressure means 20 and the vent hole 11 can be achieved.

According to the utility model discloses an embodiment, negative pressure device 20 is air exhaust device, and the air outlet channel of non return device 30 communicates with air exhaust device's import, makes from this when the moving part communicates air inlet channel to air outlet channel one-way, and air exhaust device can realize the intercommunication with air vent 11, and then, air exhaust device can bleed the culinary art chamber to reduce the atmospheric pressure of culinary art intracavity, make the culinary art intracavity realize the negative pressure state.

In some examples, the gas-extracting device may be a vacuum pump, and the gas is pumped out by the vacuum pump to reduce the pressure in the cooking cavity; of course, the air-extracting device may also be a cylinder piston assembly, and is not limited herein.

According to the utility model discloses an embodiment, negative pressure device 20 can be for the water storage cavity structure that has the heating member, heat up earlier the water storage cavity through electromagnetic heating member, form high temperature steam, discharge the culinary art intracavity, discharge the in-process of culinary art intracavity at high temperature steam, non return device 30's moving part is with inlet channel and outlet channel one-way conduction under gaseous effect, make air vent 11 can communicate with the external world from this, discharge to the culinary art intracavity along with high temperature steam, the gaseous outflow of culinary art intracavity, make the culinary art intracavity be full of high temperature gas.

Further, control electromagnetic heating element stops the heating of water storage cavity, stop to the culinary art intracavity high temperature steam of discharging, non return device 30's moving part resets, thereby close inlet channel and outlet channel's intercommunication, make the culinary art intracavity form the state sealed relatively, make the culinary art chamber natural cooling under encapsulated situation from this, according to the principle that expend with heat and contract with cold and the volume of gas liquefaction reduces, partly condensation water is reduced because the temperature reduces the volume to the high temperature steam part in the culinary art intracavity, the gaseous volume reduction in the culinary art intracavity, atmospheric pressure in the culinary art intracavity drops sharply, thereby can make the culinary art intracavity realize the negative pressure state.

Wherein, this negative pressure device 20 can set up in the culinary art intracavity, also can set up in the culinary art chamber outside, through pipeline and culinary art chamber intercommunication to the realization is to the intracavity delivery high temperature steam of culinary art.

According to an embodiment of the present invention, the negative pressure device 20 can directly heat the cooking cavity to form high temperature steam in the cooking cavity, at this time, the moving part of the non-return device 30 unidirectionally conducts the air inlet channel and the air outlet channel, so as to ensure that the air vent 11 is communicated with the outside, so that the normal temperature or low temperature gas in the cooking cavity flows out until the cooking cavity is filled with high temperature gas; and then the negative pressure device 20 is controlled to stop heating the cooking cavity, high-temperature gas in the cooking cavity is reduced, the moving part of the non-return device 30 is reset, the communication between the air inlet channel and the air outlet channel is closed, the cooking cavity is sealed, the cooking cavity is naturally cooled in a sealed state, and steam in the cooking cavity is condensed to form a negative pressure state.

As shown in fig. 5, according to an embodiment of the present invention, a through air cavity 304 communicating with the outlet of the air inlet channel and the inlet of the air outlet channel is defined in the check device 30, the movable member is disposed in the through air cavity 304, and the movable member is used for opening or closing the outlet of the air inlet channel, so as to control the on/off between the outlet of the air inlet channel and the inlet of the air outlet channel.

As shown in fig. 5 to 7, according to an embodiment of the present invention, the check device 30 includes: the air purifier comprises a base 301 and a first valve cover 302, wherein at least one air inlet channel is arranged on the base 301, the first valve cover 302 is arranged on the base 301, at least one part of a overfire air cavity 304 is defined between the first valve cover 302 and the base 301, and at least one air outlet channel is arranged on the first valve cover 302.

As shown in fig. 6, in some examples, the side wall of the base 301 has an opening penetrating through the side wall to form a locking slot 3011, and the side of the first cover 302 facing the base 301 has a locking hook 3021, and the locking hook 3021 is matched with the locking slot 3011, so that the base 301 and the first cover 302 can be locked together, and the connection is convenient and reliable. Of course, the locking slot 3011 may also be formed on the first valve cover 302, and the hook 3021 may be formed on the base 301, so that the base 301 and the first valve cover 302 are still locked, thereby improving the convenience of installation and improving the reliability after assembly.

In a further example, a sealing ring 305 is arranged between the base 301 and the first valve cover 302, so that the sealing performance of the air passing cavity 304 is ensured, and the reliability of the assembled check device 30 is further ensured.

In some examples, the first bonnet 302 has an annular positioning portion 3024 protruding from a lower surface thereof, the base 301 has a cavity with an upward opening, and the annular positioning portion 3024 is inserted into the cavity to realize the connection between the first bonnet 302 and the base 301. Of course, the outer side wall of the annular positioning portion 3024 and the inner side wall of the cavity may be connected in an interference fit manner, so as to ensure the reliability of the connection therebetween, avoid the movement of the check device 30, and simultaneously ensure the sealing property of the air passing cavity 304, thereby further ensuring the reliability of the check device 30.

As shown in fig. 6 and 7, in a further example, the first valve cover 302 has at least two lugs 3022, the lugs 3022 are provided with fixing holes 3023 penetrating through the lugs 3022, and the first valve cover 302 is connected with the lid assembly 10 through fasteners penetrating through the fixing holes 3023, so that the non-return device 30 is fixedly installed, and the non-return device 30 is prevented from moving in the lid assembly 10, which may affect the normal use of the lid assembly 10, the negative pressure device 20, and the like.

As shown in fig. 9, in some examples, check device 30 further includes: the second valve cover 303 and the second valve cover 303 are provided on the base 301, and here, the second valve cover 303 is not limited to an upper portion of the base 301, and may be a side portion, a middle portion, and the like. The other part of the air passing cavity 304 is defined between the second valve cover 303 and the base 301, at least one air outlet channel is arranged on the second valve cover 303, the structure of the second valve cover 303 can be the same as that of the first valve cover 302, namely, the first valve cover 302 and the second valve cover 303 are connected in a clamping manner and are reliably connected, or the first valve cover 302 and the second valve cover 303 are arranged on the base 301 in a pressure-sharing manner, so that the assembly is more convenient; of course, the structure of the second valve cover 303 may be different from the structure of the first valve cover 302.

As shown in fig. 4, according to an embodiment of the present invention, the cooking appliance 100 further includes: the sealing ring 50 and the sealing ring 50 are arranged on the pot cover assembly 10, the sealing ring 50 is located above the vent hole 11, the non-return device 30 is pressed on the sealing ring 305 and is in interference fit with the sealing ring 305, the sealing ring 305 defines a gas passing channel 501, and the gas passing channel 501 can communicate the gas inlet channel with the vent hole 11.

In some specific examples, the sealing ring 50 has a first annular sealing rib 51 and a second annular sealing rib 52 extending along the circumferential direction of the vent hole 11, wherein the first annular sealing rib 51 extends along the vertical direction and gradually inclines towards the direction close to the vent hole 11 from top to bottom, when a positive pressure state is formed in the cooking cavity, that is, the air pressure in the cooking cavity is greater than the external air pressure, the first annular sealing rib 51 can further cling to the cover plate 102, thereby preventing the occurrence of air leakage and avoiding the influence of the air leakage on the cooking effect; the second annular sealing rib 52 gradually extends from top to bottom towards the direction slope of keeping away from the air vent 11, and when negative pressure device 20 started work, the culinary art intracavity forms the negative pressure state gradually, and the atmospheric pressure of culinary art intracavity is less than external atmospheric pressure promptly, and the second annular sealing rib 52 can further paste tight apron 102, avoids leaking gas at the air exhaust in-process, and then influences the air exhaust effect.

As shown in fig. 5, according to an embodiment of the present invention, the air inlet channel includes a first air inlet channel 311, the air outlet channel includes a first air outlet channel 312, the first air outlet channel 312 corresponds to the first air inlet channel 311, the movable member includes a first movable member 31, and the first movable member 31 is located between the first air inlet channel 311 and the first air outlet channel 312.

As shown in fig. 5 and 6, according to an embodiment of the present invention, the first movable member 31 includes: a valve core 34 and a reset element 35, wherein the valve core 34 is movably arranged in the check device 30, one end of the valve core 34 is used for opening and closing the outlet of the first air inlet channel 311, the reset element 35 is connected on the inner wall of the valve core 34 and the check device 30, and the stop of the reset element 35 is abutted on the inner wall of the check device 30 opposite to the outlet of the first air inlet channel 311.

In the initial state, under the action of the reset piece 35, the valve core 34 abuts against the outlet of the first air inlet channel 311, at this time, the check device 30 is in the disconnected state, and the outlet of the first air inlet channel 311 is not communicated with the inlet of the first air outlet channel 312; when the negative pressure device 20 draws air, the suction force of the air drawing overcomes the compression force of the reset piece 35, so that the valve core 34 opens the outlet of the first air inlet channel 311, the check device 30 is in a conduction state at the moment, and the outlet of the first air inlet channel 311 is communicated with the inlet of the first air outlet channel 312, thereby the air drawing can be smoothly carried out.

As shown in fig. 5, in some examples, the side peripheral wall of the valve core 34 has a convex support platform 341, the resetting element 35 is a spring, the resetting element 35 is sleeved on the valve core 34, one end of the resetting element 35 abuts against the support platform 341, and the other end of the resetting element 35 abuts against the inner wall of the check device 30, so that the resetting element 35 is sleeved on the side portion of the valve core 34, and the valve core 34 and the resetting element 35 are in cooperative linkage. Preferably, the supporting platform 341 forms an annular groove with an upward opening, and the bottom of the resetting member 35 abuts against the annular groove, so as to prevent the resetting member 35 from being separated from the supporting platform 341, and improve the structural stability of the first movable member 31.

Furthermore, the inner wall of the non-return device 30 is provided with an annular limiting rib 36, the annular limiting rib 36 is opposite to the outlet of the first air inlet channel 311, that is, the annular limiting rib 36 is located on the inner wall of the non-return device 30 opposite to the outlet of the air inlet channel, the upper end of the valve core 34 is inserted into the inner side of the annular limiting rib 36, and the reset piece 35 is sleeved on the outer side of the annular limiting rib 36, so that the structural stability of the first moving piece 31 is further improved; the upper end of the spool 34 is spaced apart from the inner wall of the check device 30 when the check device 30 is in the off state, so that the spool 34 can be moved upward to open the outlet of the first air intake passage 311 when the check device 30 is switched to the on state.

In some examples, the circumferential wall of one end side of the valve core 34 has an annular groove 342 extending along the circumferential direction thereof, so that one end of the valve core 34 can form a chuck, the chuck is clamped with a sealing member 343, and the outlet of the first air inlet passage 311 is closed by the sealing member 343, so that the sealing performance can be improved, and the sealing member 343 is convenient to mount and fix, simple in overall structure and good in performance.

A first specific embodiment of a cooking appliance 100 according to the present invention is described below with reference to fig. 1 to 6.

The cooking appliance 100 includes: pot lid assembly 10, negative pressure means 20, non-return means 30 and sealing ring 50.

The pot cover assembly 10 includes: an inner lid 101 and a cover plate 102, the cover plate 102 is disposed on a side of the inner lid 101 facing the cooking cavity, the cover plate 102 has a vent hole 11 and a steam hole 18, a sealing ring 50 is fixed on the inner lid 101, the sealing ring 50 is located above the vent hole 11, and a sealing ring 305 defines a gas passing passage 501.

Non return device 30 is pressed and is established on sealing washer 305, and non return device 30 and sealing washer 305 interference fit, and non return device 30 includes: a base 301 and a first valve cover 302, wherein the base 301 is provided with a first air inlet passage 311, and the first air inlet passage 311 is communicated with the vent hole 11 through an air passing passage 501.

The first valve cover 302 defines a first air outlet channel 312, the first valve cover 302 is disposed on the base 301, specifically, a side wall of the base 301 has a clamping slot 3011, the clamping slot 3011 forms a through slot penetrating through the side wall of the base 301, one side of the first valve cover 302 facing the base 301 has a clamping hook 3021, and the clamping hook 3021 cooperates with the clamping slot 3011, so as to clamp the base 301 and the first valve cover 302.

The first bonnet 302 is provided with two lugs 3022, the lugs 3022 are provided with fixing holes 3023 penetrating through the lugs 3022, and the first bonnet 302 is fixed on the inner cover 101 through fasteners penetrating through the fixing holes 3023, so that the check device 30 is installed and fixed, and the installation is convenient and reliable and the stability is good.

A gas passing chamber 304 is defined between the first valve cover 302 and the base 301, the cross-sectional area of the gas passing chamber 304 in the horizontal direction is larger than that of the first air inlet channel 311 in the horizontal direction, and a sealing ring 305 is arranged at the joint of the base 301 and the first valve cover 302, so that the gas passing chamber 304 forms a relatively sealed chamber.

The first movable piece 31 is arranged in the gas passing cavity 304, the first movable piece 31 comprises a valve core 34 and a reset piece 35, an annular limiting rib 36 is arranged on the lower surface of the top wall of the gas passing cavity 304, the upper end of the valve core 34 is inserted into the inner side of the annular limiting rib 36, the valve core 34 and the top wall of the gas passing cavity 304 are arranged at intervals in an initial state, an annular groove 342 extending along the circumferential direction of the valve core 34 is formed in the circumferential wall of the lower end side of the valve core 34, therefore, a clamping head can be formed at the lower end of the valve core 34, a sealing piece 343 is clamped on the clamping head and used for opening and closing an outlet of the first gas inlet channel 311, and a.

The reset piece 35 is a spring, the reset piece 35 is sleeved on the valve core 34, the lower end of the reset piece 35 is abutted against the supporting table 341, and the upper end of the reset piece 35 is sleeved on the outer side of the annular limiting rib 36 and abutted against the inner surface of the top wall of the gas passing cavity 304.

The negative pressure device 20 is a vacuum pump, an inlet of the negative pressure device 20 is communicated with the first air outlet channel 312 of the check device 30 through the connecting pipe 60, and an outlet of the negative pressure device 20 is communicated with the outside.

When the cooking utensil is in a non-operating state, the sealing member 343 abuts against the outlet of the first air inlet passage 311, the first air inlet passage 311 is blocked, and outside air cannot enter the cooking cavity through the check device 30.

In the initial state of the cooking utensil, the sealing member 343 abuts against the outlet of the first air inlet channel 311, so that the check device 30 is in the disconnected state, and the outlet of the first air inlet channel 311 is not communicated with the inlet of the first air outlet channel 312.

When the cooking appliance needs to be evacuated, the suction force of the negative pressure device 20 overcomes the compression force of the reset piece 35, so that the sealing piece 343 moves upwards along with the valve core 34, the outlet of the first air inlet channel 311 is opened, the check device 30 is switched to the conduction state, the outlet of the first air inlet channel 311 is communicated with the inlet of the first air outlet channel 312, and the gas in the cooking cavity can sequentially enter the negative pressure device 20 through the first air inlet channel 311, the air passing cavity 304 and the first air outlet channel 312, so that evacuation is performed.

As shown in fig. 7 and 8, according to an embodiment of the present invention, the first movable member 31 forms a sealing diaphragm 37 having a gas hole 371, the sealing diaphragm 37 can open or close the gas hole 371 through deformation, and the gas inlet passage and the gas outlet passage can be communicated under the condition that the gas hole 371 is opened after the sealing diaphragm 37 is deformed; the inlet passage and the outlet passage can be disconnected under the condition that the air passing opening 371 is blocked after the deformation of the sealing diaphragm 37.

In some specific examples, the orthographic projection of the air vent 371 on the plane of the outlet of the first air inlet channel 311 is located outside the outlet of the first air inlet channel 311, wherein, under the condition that the check device 30 is switched to the conduction state, the sealing diaphragm 37 is deformed so as to open the outlet of the first air inlet channel 311, and the air in the cooking cavity flows to the inlet of the first air outlet channel 312 through the outlet of the first air inlet channel 311 and the air vent 371, so that the air can smoothly pass through the check device 30; in the condition where the check device 30 is switched to the off state, the sealing diaphragm 37 blocks the outlet of the first intake passage 311.

In some examples, the inner wall of the check device 30 has an annular protrusion 38 surrounding the outlet of the first air intake passage 311, and the sealing diaphragm 37 abuts against the annular protrusion 38 in a condition where the check device 30 is switched to the off state, whereby the sealing property at the outlet of the first air intake passage 311 in this state can be further ensured, and when the check device 30 is switched from the off state to the on state, the gap between the outlet of the first air intake passage 311 and the air passing port 371 of the sealing diaphragm 37 is increased, so that the amount of air passing per unit time can be increased, and the air passing efficiency can be improved; and under the condition that the sealing diaphragm 37 slightly moves, the air flow can reach the air passing hole 371 through the gap between the annular bulge 38 and the sealing diaphragm 37, so that the sensitivity and the reliability of the check device 30 are improved, and the air extraction efficiency and the air extraction performance of the negative pressure device 20 are further improved.

As shown in fig. 8, in some examples, the sealing diaphragm 37 has a plurality of air passing ports 371, the air passing ports 371 are arranged at intervals along the circumference of the outlet of the first air inlet channel 311, and each air passing port 371 is located outside the annular protrusion 38, in the initial state, the sealing diaphragm 37 is tightly attached to the annular protrusion 38, so that the outlet of the first air inlet channel 311 is blocked, and the check device 30 is in the disconnected state, and the outlet of the first air inlet channel 311 is not communicated with the inlet of the first air outlet channel 312; when the negative pressure device 20 is used for pumping air, the sealing diaphragm 37 moves upwards under the action of the suction force of the negative pressure device 20, so that the outlet of the first air inlet channel 311 is opened, the air in the cooking cavity enters the first air outlet channel 312 through the air passing hole 371, and the check device 30 is in a conducting state, namely the outlet of the first air inlet channel 311 is communicated with the inlet of the first air outlet channel 312, so that air can be pumped smoothly.

A second specific embodiment of the cooking appliance 100 according to the present invention is described below with reference to fig. 7 and 8.

The cooking appliance 100 includes: pot lid assembly 10, negative pressure means 20, non-return means 30 and sealing ring 50. The structure other than the check device 30 is the same as that of the first embodiment, and will not be described again.

The check device 30 includes: a base 301 and a first valve cover 302, wherein the base 301 is provided with a first air inlet passage 311, and the first air inlet passage 311 is communicated with the vent hole 11 through an air passing passage 501.

The first valve cover 302 defines a first air outlet channel 312, the first valve cover 302 is arranged on the base 301, a gas passing cavity 304 is defined between the first valve cover 302 and the base 301, the cross-sectional area of the gas passing cavity 304 in the horizontal direction is larger than that of the first air inlet channel 311, and an annular bulge 38 surrounding the outlet of the first air inlet channel 311 is arranged on the bottom wall of the gas passing cavity 304.

The air passing cavity 304 is internally provided with a first movable member 31, the first movable member 31 forms a sealing diaphragm 37 with air passing ports 371, the air passing ports 371 comprise a plurality of air passing ports 371, the air passing ports 371 are arranged at intervals along the circumferential direction of the outlet of the first air inlet channel 311, and the orthographic projection of each air passing port 371 on the plane of the outlet of the first air inlet channel 311 is positioned outside the annular bulge 38.

Specifically, the first bonnet 302 has an annular positioning portion 3024 protruding from a lower surface thereof, the base 301 has a cavity with an upward opening, the annular positioning portion 3024 is inserted and pressed in the cavity, the annular positioning portion 3024 is pressed on the sealing diaphragm 37, an outer side wall of the annular positioning portion 3024 is in interference fit connection with an inner side wall of the cavity, and the first bonnet 302 is connected with the base 301.

In the non-operating state of the cooking appliance, the sealing diaphragm 37 abuts against the annular projection 38, the first air inlet passage 311 is blocked, and no outside air can enter the cooking cavity through the non-return means 30.

In the initial state of the cooking utensil, the sealing diaphragm 37 abuts against the annular protrusion 38, so that the check device 30 is in the disconnected state, and the outlet of the first air inlet channel 311 is not communicated with the inlet of the first air outlet channel 312.

When the cooking appliance needs to be evacuated, the suction force of the negative pressure device 20 causes the sealing diaphragm 37 to slightly move upwards, so that the outlet of the first air inlet channel 311 is opened, the non-return device 30 is switched to a conduction state, and the air in the cooking cavity sequentially flows to the negative pressure device 20 through the first air inlet channel 311, the air vent 371, the air passing cavity 304 and the first air outlet channel 312, so that evacuation is performed.

As shown in fig. 3 and 9-14, according to an embodiment of the present invention, the pot cover assembly 10 further has a steam hole 18 thereon, the steam hole 18 is used for discharging steam in the cooking cavity, and in the long-term use of the cooking appliance, if the steam hole 18 is blocked by rice grains or foreign matters, the cooking cavity is continuously heated, which may cause a positive pressure in the cooking cavity, and when the positive pressure cannot be discharged in time, the pot cover assembly 10 and the cooking appliance 100 may be damaged.

For this reason, as shown in fig. 9, according to an embodiment of the present invention, the air inlet channel includes a first air inlet channel 311 and a second air inlet channel 321 that are communicated with each other, the air outlet channel includes a first air outlet channel 312 and a second air outlet channel 322, the first air outlet channel 321 corresponds to the first air inlet channel 311, the second air outlet channel 322 corresponds to the second air inlet channel 321, the movable member includes a first movable member 31 and a second movable member 32, the first movable member 31 is located between the first air inlet channel 311 and the first air outlet channel 312, and the second movable member 32 is located between the second air inlet channel 321 and the second air outlet channel 322.

One of first outlet channel 312 or second outlet channel 322 is in communication with the outside air, where the communication may be direct communication or indirect communication; the other of the first air outlet channel 312 or the second air outlet channel 322 is communicated with the negative pressure device 20, and when the pressure in the cooking cavity cannot be discharged through the steam holes 18, the pressure can be discharged to the outside through the first air outlet channel 312 or the second air outlet channel 322.

Through set up the air outlet channel who communicates with the outside air on non return device 30 for when cooking intracavity atmospheric pressure is great, can discharge through non return device 30, avoid causing destruction to pot cover subassembly 10 and cooking utensil 100, realize the function of safe pressure release, improved cooking utensil's security, improved user's use and experienced.

The first movable piece 31 and the second movable piece 32 have the same or different structures. For example, when the first movable member 31 and the second movable member 32 are the same in structure, they may both be in the form of a structure having a reset element 35 and a valve element 34, or may both be in the form of a structure having a sealing diaphragm 37; when the first movable member 31 and the second movable member 32 have different structures, one of the first movable member 31 and the second movable member 32 has a structure with a reset element 35 and a valve element 34, and the other has a structure with a sealing diaphragm 37.

A third specific embodiment of the cooking appliance 100 according to the present invention is described below with reference to fig. 9.

The check device 30 includes: the air conditioner comprises a base 301, a first valve cover 302 and a second valve cover 303, wherein the base 301 is defined with a first air inlet channel 311 and a second air inlet channel 312, the first air inlet channel 311 is communicated with the vent hole 11 through an air passing channel 501, and the second air inlet channel 312 is communicated with the first air inlet channel 311.

The first valve cover 302 defines a first air outlet channel 312, the first air outlet channel 312 is communicated with the outside air, the first valve cover 302 is arranged on the base 301, the first valve cover 302 is clamped with the base 301, the first valve cover 302 is provided with two lugs 3022, the lugs 3022 are provided with fixing holes 3023 penetrating through the lugs 3022, the first valve cover 302 is fixed on the inner cover 101 through a fastener penetrating through the fixing holes 3023, a part of air passing cavity 304 is defined between the first valve cover 302 and the base 301, a sealing ring 305 is arranged at the joint of the base 301 and the first valve cover 302 to form a relatively sealed cavity by the part of air passing cavity 304, the cross-sectional area of the part of air passing cavity 304 in the horizontal direction is larger than that of the first air inlet channel 311 in the horizontal direction, and the first movable element 31 is arranged in the air passing cavity 304.

The first movable member 31 includes a valve core 34 and a reset member 35, the lower surface of the top wall of the gas passing chamber 304 has an annular limiting rib 36, the upper end of the valve core 34 is inserted into the inner side of the annular limiting rib 36, and the valve core 34 is arranged at an interval with the top wall of the gas passing chamber 304 in an initial state, the peripheral wall of the lower end side of the valve core 34 has an annular groove 342 extending along the circumferential direction thereof, so that the lower end of the valve core 34 can form a chuck, a sealing member 343 is clamped on the chuck, the sealing member 343 is used for opening or closing the outlet of the first gas inlet passage 311, and the peripheral wall of the side of the valve core 34 has.

The reset piece 35 is a spring, the reset piece 35 is sleeved on the valve core 34, the lower end of the reset piece 35 is abutted against the supporting table 341, and the upper end of the reset piece 35 is sleeved on the outer side of the annular limiting rib 36 and abutted against the inner surface of the top wall of the gas passing cavity 304. Wherein, the compression force of the reset member 35 and the sealing area of the sealing member 343 are specifically determined by a limit value of safety pressure relief to ensure the safety performance of the cooking appliance.

The second valve cover 302 defines a second air outlet channel 322, the second valve cover 302 is arranged on the side of the base 301, the second valve cover 302 is clamped with the base 301, another part of air passing cavity 304 is defined between the second valve cover 303 and the base 301, the second moving part 32 is arranged in the air passing cavity 304, the second moving part 32 forms a sealing diaphragm 37 with an air passing port 371, the second valve cover 303 is provided with an annular positioning part 3024 protruding towards the base 301, and the annular positioning part 3024 presses the sealing diaphragm 37 at the outlet of the second air inlet channel 321 to realize the fixation of the sealing diaphragm 37.

The side wall of the air passing chamber 304 is provided with an annular bulge 38 surrounding the outlet of the second air inlet channel 321, the air passing ports 371 comprise a plurality of air passing ports 371, the air passing ports 371 are arranged at intervals along the circumferential direction of the outlet of the second air inlet channel 321, and the orthographic projection of each air passing port 371 on the plane of the outlet of the second air inlet channel 321 is positioned outside the annular bulge 38.

The negative pressure device 20 is a vacuum pump, an inlet of the negative pressure device 20 is communicated with the second air outlet channel 322 of the check device 30 through the connecting pipe 60, and an outlet of the negative pressure device 20 is communicated with the outside.

When the cooking utensil is in a non-operating state, the sealing member 343 abuts against the outlet of the first air inlet passage 311, the first air inlet passage 311 is blocked, the sealing diaphragm 37 abuts against the annular protrusion 38, the second air inlet passage 321 is blocked, and outside air cannot enter the cooking cavity through the check device 30.

In the initial state of the cooking appliance, the sealing member 343 abuts against the outlet of the first air inlet channel 311, and the outlet of the first air inlet channel 311 is not communicated with the inlet of the first air outlet channel 312; the sealing diaphragm 37 is tightly attached to the annular protrusion 38, so that the check device 30 is in the off state, and the outlet of the second air inlet channel 321 is not communicated with the inlet of the second air outlet channel 322.

When the cooking appliance needs to be evacuated, the suction force of the negative pressure device 20 makes the sealing diaphragm 37 slightly move to the right, so that the outlet of the second air inlet channel 321 is opened, the non-return device 30 is switched to a conduction state, and the air in the cooking cavity sequentially flows to the negative pressure device 20 through the second air inlet channel 321, the air passing hole 371, the air passing cavity 304 and the second air outlet channel 322, so that the evacuation is performed.

When steam hole 18 was sealed, cooking utensil continued work can lead to the culinary art intracavity to produce positive pressure, and this pressure is constantly increased, when pressure was greater than the compressive force of reset piece 35 in the air cavity 304, can jack-up sealing member 343 to open the export of first inlet channel 311, make the export of first inlet channel 311 and the import intercommunication of first outlet channel 312, the gas in the culinary art intracavity can be discharged to the external world through first outlet channel 312, realizes the function of safe pressure release.

As shown in fig. 11 and 12, according to an embodiment of the present invention, the check device 30 further has a pressure relief passage 33, one end of the pressure relief passage 33 is communicated with the air inlet passage, and the other end of the pressure relief passage 33 is adapted to be communicated with the outside air, so that when the pressure in the cooking cavity cannot be discharged through the steam hole 18, the pressure can be discharged to the outside through the pressure relief passage 33.

Through the pressure release passageway 33 that sets up on non return device 30 and communicate with the outside air for when cooking intracavity atmospheric pressure is great, can discharge through pressure release passageway 33, avoid causing destruction to pot cover subassembly 10 and cooking utensil 100, realize the function of safe pressure release, improved cooking utensil's security, improved user's use and experienced.

In a specific example, the cooking appliance 100 further includes: a positive pressure protection valve 40, the other end of the pressure release passage 33 being communicated with the positive pressure protection valve 40, the positive pressure protection valve 40 being configured in the following state: the pressure relief channel 33 is communicated with the outside air when the air pressure in the pressure relief channel 33 reaches the preset air pressure, so that the pressure relief of the cooking cavity is realized, and the pressure relief channel 33 is disconnected from the outside air when the air pressure in the pressure relief channel 33 is lower than the preset air pressure, so that the sealing property of the cooking cavity is ensured.

As shown in fig. 13 and 14, in some examples, the positive pressure protection valve 40 has an exhaust cavity 401, a blocking piece 41 is arranged in the exhaust cavity 401, the blocking piece 41 is used for controlling the communication and disconnection of the pressure relief channel 33 and the outside air, and the pressure relief of the cooking cavity can be realized under the condition that the blocking piece 41 communicates the pressure relief channel 33 and the outside air; the sealing of the cooking chamber can be ensured under the condition that the closure element 41 disconnects the pressure relief channel 33 from the outside air.

In some examples, the closure member 41 is movable between a first position in which the pressure relief passage 33 is closed off from the ambient air and a second position in which the closure member 41 is in the second position in which the pressure relief passage 33 is open to the ambient air.

As shown in fig. 13, in one particular example, the positive pressure protection valve 40 includes: the positive pressure protection valve 40 further comprises an air outlet 44 communicated with the outside air, and the air outlet 44 is located on the top wall of the air exhaust cavity 401.

Specifically, in a state where the air pressure in the cooking cavity is lower than a preset air pressure, the elastic member 43 urges the valve stem 42 and the blocking member 41 at the first position, so that the cooking cavity is disconnected from the outside air; under the state that atmospheric pressure in the culinary art intracavity reaches preset atmospheric pressure, the elasticity of elastic component 43 is overcome to the gas in the pressure release passageway 33, with shutoff piece 41 jack-up to the second position, and the gas in the culinary art intracavity can be through pressure release passageway 33, exhaust chamber 401 to discharge to the external world through gas vent 44, realize safe pressure release, avoid causing the destruction to cooking utensil 100.

A fourth specific embodiment of the cooking appliance 100 according to the present invention is described below with reference to fig. 10 to 14.

The cooking appliance 100 includes: the lid assembly 10, the negative pressure device 20, the check device 30, the positive pressure protection valve 40 and the sealing ring 50 have the same structure as that of the first embodiment except for the check device 30, and thus, the detailed description thereof is omitted.

The check device 30 includes: the base 301 and the first valve cover 302, the base 301 defines a first air inlet channel 311 and a pressure relief channel 33, the first air inlet channel 311 is communicated with the vent hole 11 through the air passing channel 501, one end of the pressure relief channel 33 is communicated with the first air inlet channel 311, and the other end of the pressure relief channel 33 is communicated with the positive pressure protection valve 40.

The positive pressure protection valve 40 comprises a valve seat 45 and a valve cover 46, the valve cover 46 is arranged on the valve seat 45 in a pressing mode, a fixing portion 461 is arranged on the outer side of the valve cover 46, the valve cover 46 is fixedly connected with the inner cover 101 through a fastening piece penetrating through the fixing portion 461, installation of the positive pressure protection valve 40 is achieved, an exhaust cavity 401 is defined between the valve seat 45 and the valve cover 46, a valve rod 42 and an elastic piece 43 sleeved on the outer side of the valve rod 42 are arranged in the exhaust cavity 401, a blocking piece 41 is arranged at the lower end of the valve rod 42, a convex annular boss 421 is arranged on the side peripheral wall of the valve rod 42, the elastic piece 43 is respectively abutted against the annular boss 421 and the top wall of the exhaust cavity 401, and an exhaust port 44 communicated with outside. Wherein the valve stem 42 and the closure 41 are movable between a first position and a second position.

The first valve cover 302 defines a first air outlet channel 312, the first valve cover 302 is disposed on the base 301, specifically, a side wall of the base 301 has a clamping slot 3011, the clamping slot 3011 forms a through slot penetrating through the side wall of the base 301, one side of the first valve cover 302 facing the base 301 has a clamping hook 3021, and the clamping hook 3021 cooperates with the clamping slot 3011, so as to clamp the base 301 and the first valve cover 302. The first bonnet 302 is provided with two lugs 3022, the lugs 3022 are provided with fixing holes 3023 penetrating through the lugs 3022, and the first bonnet 302 is fixed on the inner cover 101 through fasteners penetrating through the fixing holes 3023, so that the check device 30 is installed and fixed, and the installation is convenient and reliable and the stability is good.

When the cooking utensil is in a non-operating state, the sealing member 343 abuts against the outlet of the first air inlet passage 311, the first air inlet passage 311 is blocked, the blocking member 41 abuts against the first position, the pressure relief passage 33 is disconnected from the outside air, and the outside air cannot enter the cooking cavity through the check device 30.

In the initial state of the cooking utensil, the sealing member 343 abuts against the outlet of the first air inlet channel 311, the outlet of the first air inlet channel 311 is not communicated with the inlet of the first air outlet channel 312, and the blocking member 41 disconnects the pressure relief channel 33 from the outside air.

When steam hole 18 was blocked, cooking utensil continued work can lead to the culinary art intracavity to produce positive pressure, and this pressure constantly increases, and when pressure was greater than the compressive force of elastic component 43 in the exhaust chamber 401, can be with shutoff piece 41 jack-up to the second position to make pressure release channel 33 and outside air intercommunication, the gas of culinary art intracavity can be through pressure release channel 33 and exhaust chamber 401, and discharge to the external world through gas vent 44, realize the function of safe pressure release.

As shown in fig. 15-18, according to an embodiment of the present invention, the pot lid assembly 10 includes: an inner lid 101 and a cover plate 102, the cover plate 102 being provided on a side of the inner lid 101 facing the cooking chamber, the vent hole 11 being provided in the cover plate 102, the inner lid 101 having a vent hole 12 adapted to communicate with the outside air, an outlet of the negative pressure means 20 being connected to the vent hole 12. Wherein, if the aperture of the exhaust hole 12 is too big, the aesthetic property of the pot body assembly 10 will be greatly affected, and if the aperture of the exhaust hole 12 is too small, the exhaust efficiency of the negative pressure device 20 will be affected, and further the air extraction efficiency of the negative pressure device 20 will be affected, therefore, the aperture of the exhaust hole 12 is limited between 1mm and 5mm, that is, the aperture of the exhaust hole 12 can be 1mm, 5mm, or any size between 1mm and 5mm, for example, 2.5mm, and by limiting the aperture of the exhaust hole 12, the pot cover assembly 10 is more elegant and beautiful, and simultaneously the residual dirt is avoided.

According to an embodiment of the present invention, the upper surface of the inner lid 101 has an exhaust joint 13, the exhaust joint 13 defines an exhaust hole 12, the inner lid 101 is further provided with a plurality of reinforcing ribs 14 connected to the exhaust joint 13, and the upper end surfaces of the reinforcing ribs 14 are lower than the upper end surfaces of the exhaust joint 13, wherein the plurality of reinforcing ribs 14 are arranged at intervals along the circumferential direction of the exhaust joint 13; or the periphery of the inner cover 101 is provided with a blocking rib 15 protruding out of the upper surface of the inner cover 101, the upper end surface of the blocking rib 15 is lower than the upper end surface of the exhaust joint 13, and the height between the upper end surface of the blocking rib 15 and the upper end surface of the exhaust joint 13 is 5mm-20 mm; or, the inner cover 101 also has an air passing hole 16 suitable for communicating with the outside air, and the cooking utensil also comprises an on-off valve which is used for controlling the on-off of an air path between the air passing hole 16 and the cooking cavity; the aperture of the air passing hole 16 is 1mm-5 mm; the upper surface of the inner lid 101 is provided with a gas passing joint 17, the gas passing joint 17 defines a gas passing hole 16, and the structure of the gas passing joint 17 is the same as that of the exhaust joint 13.

As shown in fig. 16 and 17, in some examples, the inner lid 101 has an exhaust connector 13 on an upper surface thereof, the exhaust connector 13 defines an exhaust hole 12, and the inner lid 101 is further provided with a rib 14 connected to the exhaust connector 13 to improve stability of the exhaust connector 13 and prevent the exhaust connector 13 from being disconnected from the negative pressure device 20. The reinforcing ribs 14 may include a plurality of reinforcing ribs 14, and the plurality of reinforcing ribs 14 are arranged at intervals in the circumferential direction of the exhaust fitting 13, thereby further improving the stability of the exhaust fitting 13.

The negative pressure device 20 is usually connected to the exhaust joint 13 through the connecting pipe 60, and in order to ensure that the connecting pipe 60 can be reliably plugged into the exhaust joint 13, the upper end surface of the reinforcing rib 14 should be lower than the upper end surface of the exhaust joint 13, so that the plugging of the connecting pipe 60 is facilitated, and the connecting pipe 60 is prevented from being disconnected from the exhaust joint 13 after being plugged, and the use of the negative pressure device 20 is prevented from being influenced.

As shown in fig. 17 and 18, in some specific examples, the inner cover 101 has a rib 15 protruding from the upper surface of the inner cover 101, the rib 15 is disposed around the inner cover 101 to protect the inner cover, the upper end surface of the rib 15 is lower than the upper end surface of the exhaust connector 13 to facilitate the insertion of the connection pipe 60 during assembly, and to avoid dirt and dirt between the rib 15 and the exhaust connector 13, the height between the upper end surface of the rib 15 and the upper end surface of the exhaust connector 13 is H, and if H is too small, the insertion of the connection pipe 60 is not facilitated, and it is difficult to clean when dirt exists; since the mounting of the inner lid 101 is affected when H is too large, the value of H is limited to 5mm to 20mm, that is, H may be 5mm, H may be 20mm, or H may be any size between 5mm and 20mm, for example, H is 15 mm.

As shown in fig. 15, in some examples, the inner lid 101 further has an air passing hole 16 adapted to communicate with the outside air, the cooking appliance 100 further includes an on-off valve for controlling the on-off of an air path between the air passing hole 16 and the cooking cavity, in an initial state, the on-off valve disconnects the air path between the air passing hole 16 and the cooking cavity, in a temperature keeping stage, the negative pressure device 20 sucks air from the cooking cavity to form a negative pressure state in the cooking cavity, so as to facilitate the heat preservation and the preservation of the food material, before the lid is opened at the end of the temperature keeping stage, the on-off valve is controlled to conduct the air path between the air passing hole 16 and the cooking cavity, so that the outside air can enter the cooking cavity, and the normal pressure is formed in the cooking cavity, thereby the lid.

Wherein, if the aperture of air passing hole 16 is too big, can very influence the aesthetic property of pot body subassembly 10, if the aperture of air passing hole 16 is too little, can influence the latency of uncapping, be unfavorable for manufacturing simultaneously, and the aperture of air passing hole 16 is too big can influence its leakproofness, therefore inject the aperture of air passing hole 16 between being 1mm-5mm, the aperture of air passing hole 16 can be 1mm promptly, the aperture of air passing hole 16 also can be 5mm, the aperture of air passing hole 16 can also be 1mm to 5mm between arbitrary size, for example the aperture of air passing hole 16 is 2mm, through the aperture of air passing hole 16 of injecing, make pot cover subassembly 10 more elegant appearance, avoid remaining the dirt simultaneously.

As shown in fig. 17, in some examples, the upper surface of the inner lid 101 has a gas passing connector 17, the gas passing connector 17 defines a gas passing hole 16, the structure of the gas passing connector 17 is the same as that of the gas discharge connector 13, so that the manufacture is convenient, and the gas passing connector 17 is arranged adjacent to the gas discharge connector 13, so that the utilization rate of the space on the inner lid 101 is improved.

A specific embodiment of a lid assembly 10 according to the present invention is described below with reference to fig. 15-18.

The pot cover assembly 10 comprises an inner cover 101 and a cover plate 102, the cover plate 102 is arranged on one side, facing the cooking cavity, of the inner cover 101, the upper surface of the inner cover 101 is provided with an exhaust joint 13 and a gas passing joint 17, the exhaust joint 13 defines an exhaust hole 12, the gas passing joint 17 defines a gas passing hole 16, the exhaust hole 12 and the gas passing hole 16 are communicated with the outside air, the aperture of the exhaust hole 12 is 3mm, the aperture of the gas passing hole 16 is also 3mm, the apertures of the two holes are small, the visual effect is improved, the structure of the inner cover 101 is attractive and elegant, and meanwhile, the manufacturing and processing are convenient.

The exhaust joint 13 is communicated with the outlet of the negative pressure device 20 through a connecting pipe 60, and the air passing joint 17 is communicated with the cooking cavity through a cut-off valve. The exhaust joint 13 and the air passing joint 17 are connected through the reinforcing ribs 14, the plurality of reinforcing ribs 14 are further arranged on the exhaust joint 13 and the air passing joint 17 respectively, the upper end surfaces of the exhaust joint 13 and the air passing joint 17 are flush, but the upper end surfaces of the reinforcing ribs 14 are lower than the upper end surface of the exhaust joint 13, so that the connecting pipe 60 can be fixedly installed, and dirt can be prevented from being stored; the periphery of inner cup 101 has the fender muscle 15 of protrusion inner cup 101 upper surface, and the up end of fender muscle 15 is less than the up end of exhaust joint 13, and the height H between the up end of fender muscle 15 and the up end of exhaust joint 13 is 10mm, further avoids remaining the spot on inner cup 101.

In which, the pot cover assembly 10 according to the embodiment of the present invention can be applied to any one of the aforementioned embodiments.

According to the utility model discloses cooking utensil has improved cooking utensil's life, has reduced cooking utensil's cost, improves the market competition of product, and user experience is good.

Other constructions and operations of the cooking appliance according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features through another feature not directly in contact. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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 present 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.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooking appliance, comprising:

a lid assembly having a vent adapted to communicate with the cooking cavity;

negative pressure means adapted to create a negative pressure condition within the cooking cavity; and the number of the first and second groups,

the non-return device comprises an air inlet channel, a moving part and an air outlet channel, the air inlet channel is communicated with the air vent, the moving part is positioned between the air inlet channel and the air outlet channel, and the moving part enables the air inlet channel to be communicated with the air outlet channel in a one-way mode or closed and communicated with the air outlet channel according to the control of the negative pressure device.

2. The cooking appliance of claim 1, wherein the negative pressure device is a gas evacuation device adapted to be connected to the vent hole to create a negative pressure condition within the cooking cavity, wherein the gas outlet channel is in communication with an inlet of the gas evacuation device.

3. The cooking appliance according to claim 1, wherein the air inlet channel comprises a first air inlet channel and a second air inlet channel which are communicated with each other, the air outlet channel comprises a first air outlet channel corresponding to the first air inlet channel and a second air outlet channel corresponding to the second air inlet channel,

the movable piece comprises a first movable piece and a second movable piece, the first movable piece is located between the first air inlet channel and the first air outlet channel, and the second movable piece is located between the second air inlet channel and the second air outlet channel.

4. The cooking appliance according to claim 1, wherein the check device is further provided with a pressure relief channel, one end of the pressure relief channel is communicated with the air inlet channel, and the other end of the pressure relief channel is suitable for being communicated with the outside air.

5. The cooking appliance of claim 4, further comprising:

the positive pressure protection valve, the pressure release passageway passes through positive pressure protection valve and outside air intercommunication, the positive pressure protection valve is constructed into atmospheric pressure in the pressure release passageway reaches the intercommunication with the outside air under the state of predetermineeing atmospheric pressure in the pressure release passageway is less than with outside air disconnection under the state of predetermineeing atmospheric pressure.

6. The cooking appliance according to claim 5, wherein the positive pressure protection valve further comprises an air exhaust cavity, a movable blocking piece is arranged in the air exhaust cavity, and the blocking piece is used for controlling the connection and disconnection of the pressure relief channel and the outside air.

7. The cooking appliance of claim 6, wherein the positive pressure protection valve comprises:

the plugging piece is arranged at one end of the valve rod, and the side peripheral wall of the valve rod is provided with an outward convex annular boss;

the cover is located the elastic component in the valve rod outside, the elastic component respectively with annular boss with the inner wall in exhaust chamber ends to, the malleation protection valve still has the gas vent with the outside air intercommunication.

8. The cooking appliance of any one of claims 1-7, wherein the movable member comprises:

the valve core is movably arranged in the non-return device, and one end of the valve core is used for opening and closing an outlet of the air inlet channel;

and the resetting piece is connected between the valve core and the inner wall of the check device opposite to the outlet of the air inlet channel.

9. The cooking utensil of claim 8, wherein the side peripheral wall of the valve core has a support platform protruding outward, the reset member is sleeved on the valve core, one end of the reset member abuts against the support platform, and the other end abuts against the inner wall of the check device.

10. The cooking utensil of claim 8, wherein the inner wall of the check device is provided with an annular limiting rib, the annular limiting rib is opposite to the outlet of the air inlet channel, the other end of the valve core is inserted into the inner side of the annular limiting rib, and the reset piece is sleeved on the outer side of the annular limiting rib.

11. The cooking utensil of claim 8 wherein the peripheral wall of the valve element on one end side has an annular groove extending circumferentially thereof to form a catch on one end of the valve element, the catch having a seal snap-fit thereon.

12. The cooking appliance according to any one of claims 1 to 7, wherein the movable member forms a sealing diaphragm having a gas passing opening, and the sealing diaphragm is deformed to open or close the gas passing opening to connect or disconnect the gas inlet channel and the gas outlet channel.

13. The cooking appliance according to claim 12, wherein the inner wall of the non-return means has an annular projection surrounding the outlet of the air intake channel, against which the sealing diaphragm abuts in the condition of the non-return means switching to the off-state.

14. The cooking appliance of claim 12, wherein the plurality of air vents are spaced circumferentially around the outlet of the air inlet passage.

15. The cooking appliance according to any one of claims 1 to 7, wherein the non-return means defines therein a gas passing chamber communicating with the outlet of the gas inlet channel and with the inlet of the gas outlet channel, and the movable member is disposed in the gas passing chamber for opening and closing the outlet of the gas inlet channel to control the opening and closing of the inlet and the outlet of the gas outlet channel.

16. The cooking appliance of claim 15, wherein the non-return means comprises:

the base is provided with at least one air inlet channel;

the first valve cover is arranged on the base, at least one part of the air passing cavity is defined between the first valve cover and the base, and at least one air outlet channel is arranged on the first valve cover.

17. The cooking appliance of claim 16, wherein one of the base and the first valve cover has a snap-fit notch and the other of the base and the first valve cover has a snap-fit hook that cooperates with the snap-fit notch to snap-fit the base and the first valve cover.

18. The cooking appliance of claim 16, wherein the no-return device further comprises: the second valve cover is arranged on the base, the other part of the air passing cavity is defined between the second valve cover and the base, and the at least one air outlet channel is arranged on the second valve cover.

19. The cooking appliance of claim 2, wherein the lid assembly comprises: the inner cup with establish the orientation of inner cup the apron of culinary art chamber one side, the air vent is located the apron, the inner cup has the exhaust hole that is suitable for with the outside air intercommunication, air exhaust device's export with exhaust hole connects.

20. The cooking appliance of claim 19, wherein the vent has an aperture of 1mm to 5 mm.