CN112294127A

CN112294127A - Pressure limiting valve and cooking utensil

Info

Publication number: CN112294127A
Application number: CN201910684977.2A
Authority: CN
Inventors: 张懿豪; 瞿义
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-02-02

Abstract

The invention provides a pressure limiting valve and a cooking appliance. The pressure limiting valve includes: the valve seat is provided with an air inlet; the valve cover is buckled on the valve seat and is surrounded with the valve seat to form a cavity, and at least two mounting holes are formed in the top end of the valve cover and are communicated with the cavity; the floating valves are arranged in the at least two mounting holes in a one-to-one correspondence mode, the floating valves are provided with exhaust channels, the floating valves are provided with sealing positions for plugging the mounting holes and exhaust positions for enabling the exhaust channels to be communicated with the cavities, and the floating valves float up and down along the axial direction of the mounting holes to switch between the sealing positions and the exhaust positions. Because the number of the floating valves is more than two, each floating valve is provided with the exhaust channel, the cooking utensil is simultaneously exhausted through the exhaust channels, the cold air in the cooking utensil can be quickly exhausted, the cold air residue in the cooking utensil can be effectively reduced, and the cooking efficiency of the cooking utensil is improved.

Description

Pressure limiting valve and cooking utensil

Technical Field

The invention relates to the technical field of household appliances, in particular to a pressure limiting valve and a cooking appliance.

Background

The electric pressure cooker is an upgrading and updating product of the traditional pressure cooker and the electric cooker, combines the advantages of the pressure cooker and the electric cooker, thoroughly solves the safety problem of the pressure cooker, and eliminates the potential safety hazard which puzzles consumers for many years by the common pressure cooker; the thermal efficiency is more than 80%, and time and electricity are saved.

The existing pressure limiting valve only can seal an exhaust nozzle and keep the pressure in the cooker under the working pressure, but after the cold cooker of the electric pressure cooker is started and a check valve floats upwards, the check valve and the pressure limiting valve seal the cooker, and the cold gas in the rest part is not completely discharged, thereby affecting the cooking effect. During the cooking process of the pressure limiting valve, as long as the pressure in the cooker does not exceed the working pressure, no action is caused, for example, foods such as rice cooking and the like do not need the pressure, and the prior separating electric pressure cooker needs a fierce fire, so that elastic and glutinous rice grains cannot be cooked well.

Disclosure of Invention

The invention mainly aims to provide a pressure limiting valve and a cooking appliance, and aims to solve the problem that the pressure limiting valve of the cooking appliance is difficult to completely discharge cold air in the cooking appliance.

In order to achieve the above object, according to one aspect of the present invention, there is provided a pressure limiting valve including: the valve seat is provided with an air inlet; the valve cover is buckled on the valve seat and forms a cavity with the valve seat in an enclosing manner, at least two mounting holes are formed in the top end of the valve cover, and the mounting holes are communicated with the cavity; the float valve, at least two the float valve is installed one-to-one in at least two the mounting hole, be provided with exhaust passage on the float valve, the float valve has with the sealed position of mounting hole shutoff with make exhaust passage with the exhaust position of cavity intercommunication, the float valve is followed the axial of mounting hole is floated from top to bottom in order to be in sealed position with switch between the exhaust position. When the cooking utensil starts to work, the floating valve is in the air exhaust position, cold air in the cooking utensil can enter the cavity from the air inlet hole, enters the air exhaust channel on the floating valve from the cavity and is finally exhausted to the outside of the cooking utensil. Because the number of the floating valves is more than two, each floating valve is provided with the exhaust channel, the cooking utensil is simultaneously exhausted through the exhaust channels, the cold air in the cooking utensil can be quickly exhausted, the cold air residue in the cooking utensil can be effectively reduced, and the cooking efficiency of the cooking utensil is improved.

Further, the float valve includes: the exhaust channel is arranged on the valve body, and the inlet end of the exhaust channel is positioned on the side wall surface of the valve body; the sealing ring is sleeved at the bottom end of the valve body, the outer diameter of the sealing ring is larger than the inner diameter of the mounting hole, and the inlet end of the exhaust passage is higher than the sealing ring. In the initial state, the float valve is naturally placed in the mounting hole under the action of gravity, and the exhaust channel is communicated with the cavity at the moment, so that cold air is conveniently discharged when the cooking appliance starts to work.

Along with the continuous heating of cooking utensil, the inside pressure of cooking utensil constantly rises, and the pressure in the cavity also constantly rises, can make the float valve rise along the mounting hole, and exhaust passage's entry end also constantly rises, and until the sealing washer with the mounting hole shutoff sealed, disconnection intercommunication between exhaust passage and the cavity is concerned, and at this moment, the inside edible material of cooking utensil is in a relative sealed state, is convenient for cook fast to edible material.

Further, the valve body includes: the first cylindrical section is inserted into the mounting hole; the second cylindrical section is coaxial with the first cylindrical section, the second cylindrical section is located at the top end of the first cylindrical section, and the outer diameter of the second cylindrical section is larger than the inner diameter of the mounting hole and the outer diameter of the first cylindrical section, so that the whole valve body is arranged in a T shape, and the floating valve can be prevented from falling in the cavity under the action of the second cylindrical section.

Furthermore, the top of the valve body is provided with a blind hole sunken downwards, the valve body is further provided with a connecting hole, the connecting hole extends to the blind hole from the side wall surface of the valve body, and the blind hole and the connecting hole form the exhaust channel. In actual processing, a blind hole can be processed along the axis of the valve body, and then a connecting hole is processed from the peripheral side wall of the valve body to form an exhaust passage, so that the production cost of the pressure limiting valve is reduced.

Furthermore, the connecting holes are multiple and multiple, and the connecting holes are arranged along the periphery of the blind hole at intervals, so that quick exhaust is convenient to realize.

Further, the number of the float valves is two, and the two float valves have different masses. The quality of two float valves is different, and when the in-service operation, the lower one of float valve weight is at first upwards floated, then the higher one of weight floats again, is convenient for continuously carry out gaseous emission, is convenient for discharge the inside air conditioning of cooking utensil to cooking utensil's outside completely.

Further, the pressure limiting valve further comprises: the exhaust pipe is detachably arranged at the air inlet, so that the air inlet of the pressure limiting valve and the inner pot of the cooking utensil can be conveniently connected.

Further, the air intake hole includes: a first bore section; a second bore section at a bottom end of the first bore section, the second bore section having an inner diameter greater than an inner diameter of the first bore section; the pressure limiting valve further comprises: and the sealing gasket is fixed at the top of the second hole section, and a through hole corresponding to the first hole section is formed in the sealing gasket. After installing the blast pipe on cooking utensil's pot cover subassembly, the disk seat is pressed on the top of blast pipe, under the action of gravity of disk seat, can make the gasket compressed tightly on the top of blast pipe, realizes the sealed in clearance between inlet port and the blast pipe, is convenient for make cooking utensil step up fast.

Further, the air inlet hole still includes: the third hole section is positioned at the bottom end of the second hole section, the inner diameter of the third hole section is smaller than that of the second hole section, and a groove is formed in the inner wall of the third hole section; and the outer side wall surface of the exhaust pipe is provided with a convex block corresponding to the groove.

Further, the recess with the lug is a plurality of, and is a plurality of the recess sets up with a plurality of lug one-to-one, and the structure is more stable, can make recess and recess aim at fast, is convenient for realize the fast assembly of blast pipe and disk seat.

Further, a plurality of the projections are arranged at intervals along the same circumference. In actual processing, the exhaust pipe is clamped once, and a plurality of convex blocks can be processed at one time by processing along the circumferential direction of the exhaust pipe, so that the production cost of the pressure limiting valve is reduced.

Furthermore, the valve cover and the valve seat are fixedly connected together through threads, the structure is simple, and the valve cover and the valve seat are convenient to disassemble and assemble so as to clean the pressure limiting valve.

According to another aspect of the invention, a cooking appliance is provided, which comprises a limit valve, wherein the limit valve is the above-mentioned limit valve.

By applying the technical scheme of the invention, the number of the floating valves is more than two, each floating valve is provided with the exhaust channel, and the cooking utensil is simultaneously exhausted through the exhaust channels, so that cold air in the cooking utensil can be rapidly exhausted, the cold air residue in the cooking utensil can be effectively reduced, and the cooking efficiency of the cooking utensil is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 schematically illustrates a cross-sectional view of the float valve of the pressure limiting valve of the present invention in a venting position;

FIG. 2 schematically illustrates a cross-sectional view of the float valve of the pressure limiting valve of the present invention in a sealed position;

FIG. 3 schematically illustrates an exploded cross-sectional view of the pressure limiting valve of the present invention;

FIG. 4 is a schematic illustration of the flow of air when the pressure limiting valve of the present invention is in the exhaust position;

FIG. 5 schematically illustrates the gas flow profile at the valve seat of the present invention;

FIG. 6 schematically illustrates an air flow pattern of the inventive float valve in the exhaust position;

FIG. 7 schematically illustrates a top view of a valve housing of the present invention;

FIG. 8 schematically illustrates a front view of the exhaust pipe of the present invention;

fig. 9 is a view schematically showing the positional relationship between the exhaust pipe and the gasket when the pressure limiting valve of the present invention is in a pressure relief state.

Wherein the figures include the following reference numerals:

10. a valve seat; 11. an air inlet; 111. a first bore section; 112. a second bore section; 113. a third bore section; 114. a groove; 20. a valve housing; 21. mounting holes; 22. a cavity; 30. a float valve; 31. a valve body; 311. blind holes; 312. connecting holes; 313. a first cylindrical section; 3131. a clip-shaped groove; 314. a second cylindrical section; 32. a seal ring; 40. an exhaust pipe; 41. a bump; 50. a gasket; 51. and a through hole.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 to 9, according to an embodiment of the present invention, a cooking appliance, in particular, an electric pressure cooker is provided.

The electric pressure cooker in the embodiment comprises a cooker body (not shown in the figure) and a cooker cover assembly (not shown in the figure) arranged on the cooker body, so that cold air in the cooker body is discharged, the cooker cover assembly in the embodiment is provided with a pressure limiting valve, and under the action of the pressure limiting valve, on one hand, the cold air in the cooker body is conveniently discharged to the outside of a cooking appliance, and on the other hand, the pressure limiting operation of sealing the cooking appliance is also convenient.

Referring to fig. 1 to 3, the pressure limiting valve in the present embodiment includes a valve seat 10, a valve housing 20, a float valve 30, and an exhaust pipe 40.

Wherein, the valve seat 10 is provided with an air inlet 11, and the exhaust pipe 40 is detachably arranged at the air inlet 11; the valve cover 20 is buckled on the valve seat 10 and surrounds the valve seat 10 to form a cavity 22, at least two mounting holes 21 are formed in the top end of the valve cover 20, and the mounting holes 21 are communicated with the cavity 22; at least two float valves 30 are installed in the at least two mounting holes 21 in one-to-one correspondence, and the float valves 30 have a sealing position for closing the mounting holes 21 and a venting position for communicating the venting passage with the cavity 22.

In practical use, the exhaust pipe 40 of the present embodiment is installed at the exhaust through hole of the lid assembly, and the float valve 30 floats up and down in the axial direction of the installation hole 21 to switch between the sealing position and the exhaust position.

When the cooking utensil is just started, the floating valve 30 is in the air exhaust position (as shown in fig. 1), and cold air inside the cooking utensil can enter the air inlet hole 11 from the air exhaust pipe 40, then enter the cavity 22, enter the air exhaust channel on the floating valve 30 from the cavity 22, and finally be exhausted to the outside of the cooking utensil. Because the float valve 30 in this embodiment is more than two, all be provided with exhaust passage on each float valve 30, exhaust cooking utensil simultaneously through a plurality of exhaust passages, can discharge the inside air conditioning of cooking utensil rapidly, and then can effectively reduce the air conditioning in the cooking utensil and remain, be convenient for improve cooking utensil's in this embodiment culinary art efficiency.

After the cooking appliance works for a period of time, the pressure inside the cooking appliance is continuously increased, steam in the cooking appliance continuously enters the cavity 22 from the exhaust pipe 40, and when the steam pressure in the cavity 22 is greater than the gravity of the float valve 30, the float valve 30 can float upwards, so that the float valve 30 is switched from the exhaust position to the sealing position, the food in the cooking appliance is in a relatively closed environment, and the food in the cooking appliance is convenient to cook quickly.

After cooking utensil culinary art a period, can carry out the pressure release to the pressure limiting valve through pressure release button drive pressure release mechanism on the cooking utensil, particularly, can jack-up disk seat 10 through pressure release mechanism for the air current flows out from the gap between blast pipe 40 and the inlet port 11, and at this in-process, the pressure in the cavity 22 constantly descends, and float valve 30 moves down under the action of gravity, and the air current can get into the outside that the exhaust passage on the float valve 30 discharged to cooking utensil from cavity 22 simultaneously, and easy operation, the pressure release is quick.

Meanwhile, the cooking appliance in the embodiment can also be subjected to manual pressure relief, when the pressure relief is performed manually, only the valve seat 10 and the valve cover 20 need to be lifted manually, at the moment, the air flow in the cooking appliance can flow out from the gap between the exhaust pipe 40 and the air inlet hole 11, and the exhaust channel on the floating valve 30 is simultaneously discharged to the outside of the cooking appliance, so that the operation is simple, and the pressure relief is rapid.

Referring to fig. 1 to 7, the float valve 30 in the present embodiment includes a valve body 31 and a seal ring 32.

In actual design, the exhaust channel is arranged on the valve body 31, and the inlet end of the exhaust channel is positioned on the side wall surface of the valve body 31 and is higher than the sealing ring 32; the sealing ring 32 is sleeved at the bottom end of the valve body 31, and the outer diameter of the sealing ring 32 is larger than the inner diameter of the mounting hole 21.

The inlet end of the exhaust passage mentioned in this embodiment is higher than the sealing ring 32, which means that when the pressure limiting valve is mounted on the lid assembly, the inlet end of the exhaust passage is located above the sealing ring 32 as viewed in the height direction of the cooking appliance, as shown in fig. 1 to 4 and fig. 6.

In the initial state, the float valve 30 is naturally placed in the mounting hole 21 by gravity, and the exhaust passage is communicated with the cavity 22, so that the cold air can be discharged when the cooking appliance starts to work.

Along with the continuous heating of cooking utensil, the pressure in the cooking utensil constantly rises, and the pressure in cavity 22 also constantly rises, can make float valve 30 rise along mounting hole 21, and the entry end of exhaust passage also constantly rises, and until sealing washer 32 with mounting hole 21 shutoff sealed, disconnection intercommunication between exhaust passage and the cavity 22, at this moment, the edible material in the cooking utensil is in a relative sealed state, is convenient for cook fast the edible material.

Preferably, the sealing ring 32 in this embodiment is a silica gel ring, and has a simple structure and a long service life.

As shown in fig. 6, the valve body 31 in the present embodiment includes a first cylindrical section 313 and a second cylindrical section 314.

The first cylindrical section 313 is inserted into the mounting hole 21, the sealing ring 32 is mounted at the bottom end of the first cylindrical section 313, and during actual mounting, the bottom end of the first cylindrical section 313 is provided with a square-shaped groove 3131, and the sealing ring 32 is sleeved in the square-shaped groove 3131, so that the structure is simple and the mounting is convenient.

The second cylindrical section 314 is coaxially arranged with the first cylindrical section 313, the second cylindrical section 314 is positioned at the top end of the first cylindrical section 313, the outer diameter of the second cylindrical section 314 is larger than the inner diameter of the mounting hole 21 and the outer diameter of the first cylindrical section 313, so that the whole valve body 31 is arranged in a T shape, and the floating valve 30 can be prevented from falling into the cavity 22 through the action of the second cylindrical section 314. It can be seen that the float valve 30 in the present embodiment can float up and down in the mounting hole 21 to switch between the exhaust position and the sealing position through the action of the second cylindrical section 314 and the sealing ring 32, and the structure is simple, stable and reliable.

Of course, in other embodiments of the invention, the first cylindrical section 313 and the second cylindrical section 314 may be arranged as prisms, or other deformed columns, as long as other deformation modes capable of preventing the valve body 31 from falling into the cavity 22 are within the protection scope of the invention.

For convenience of processing, the top of the valve body 31 in this embodiment is provided with a blind hole 311 recessed downward, the valve body 31 is further provided with a connecting hole 312, the connecting hole 312 extends from the side wall surface of the valve body 31 to the blind hole 311, an exhaust passage is formed by the communication between the connecting hole 312 and the blind hole 311, and the port of the connecting hole 312 on the side wall surface of the valve body 31 is higher than the sealing ring 32. In actual processing, the blind hole 311 may be processed along the axis of the valve body 31, and then the connection hole 312 is processed from the outer peripheral sidewall of the valve body 31 to form an exhaust passage, which is convenient for reducing the production cost of the pressure limiting valve in the embodiment.

The connection hole 312 in this embodiment may be provided in a direction perpendicular to the axis of the valve body 31, and may also be provided in a direction oblique to the axis of the valve body 31.

Preferably, the number of the connection holes 312 in this embodiment is multiple, and the connection holes 312 are arranged at intervals along the outer circumference of the blind hole 311, so as to facilitate quick air exhaust.

Further preferably, the number of the connecting holes 312 in this embodiment is two, so that the cooking appliance can be quickly pressurized while quick exhaust is realized, and the situation that the pressure of the cooking appliance is too slow due to too many connecting holes 312 is avoided.

Further, referring to fig. 1 to 7 again, the number of the float valves 30 in the present embodiment is two, and the two float valves 30 have different masses, and in actual operation, the lower weight one of the float valves 30 floats upwards first, and then the higher weight one floats upwards again, so that the gas is discharged continuously, and the cold air inside the cooking appliance is discharged to the outside of the cooking appliance completely.

It can be seen that since the two float valves 30 have different weights, one float valve 30 weighs 1 gram and the other weighs 2 grams. Before the air exhaust stage, namely before the air is pressurized, the light float valve 30 floats upwards firstly, then the heavy float valve 30 floats upwards, and the two float valves 30 float upwards in different stages, so that the cold air in the electric pressure cooker can be exhausted as far as possible, and the cooking effect is better and ideal.

Referring to fig. 1 to 9, the air intake hole 11 in the present embodiment includes a first hole section 111, a second hole section 112, and a third hole section 113, wherein the second hole section 112 is located at a bottom end of the first hole section 111, and an inner diameter of the second hole section 112 is larger than that of the first hole section 111. The pressure limiting valve further comprises a sealing gasket 50, the sealing gasket 50 is fixed on the top of the second hole section 112, and a through hole 51 corresponding to the first hole section 111 is formed in the sealing gasket 50.

After the exhaust pipe 40 is installed on the lid assembly of the cooking appliance, the valve seat 10 is pressed on the top end of the exhaust pipe 40, and under the action of gravity of the valve seat 10, the sealing gasket 50 can be pressed on the top end of the exhaust pipe 40, so that the gap between the air inlet hole 11 and the exhaust pipe 40 is sealed, and the cooking appliance can be quickly pressurized. Preferably, the sealing pad 50 in this embodiment is a silicone pad.

The third hole section 113 is positioned at the bottom end of the second hole section 112, the inner diameter of the third hole section 113 is smaller than that of the second hole section 112, and a groove 114 is arranged on the inner wall of the third hole section 113; correspondingly, the outer side wall surface of the exhaust pipe 40 is provided with a projection 41 corresponding to the groove 114.

In actual assembly and disassembly, the projection 41 on the exhaust pipe 40 is aligned with the groove 114 on the third hole section 113, so that the exhaust pipe can be inserted into the mounting hole 21, and after the exhaust pipe is mounted in place, the projection 41 and the groove 114 are axially dislocated, so that the valve seat 10 and the exhaust pipe 40 can be assembled together, and the valve seat 10 and the exhaust pipe 40 are prevented from being separated and falling off.

Preferably, the number of the grooves 114 and the protrusions 41 in this embodiment is multiple, and the grooves 114 and the protrusions 41 are arranged in a one-to-one correspondence, so that the structure is more stable, the grooves 114 and the grooves 114 can be quickly aligned, and the quick assembly of the exhaust pipe 40 and the valve seat 10 is facilitated.

Furthermore, the plurality of convex blocks 41 are arranged along the same circumference at intervals, and during actual processing, the exhaust pipe 40 only needs to be clamped once, and the plurality of convex blocks 41 can be processed at one time by processing along the circumferential direction of the exhaust pipe 40, so that the production cost of the pressure limiting valve in the embodiment is reduced.

In other embodiments of the present invention, the groove 114 may be disposed on the exhaust pipe 40, and the protrusion 41 may be disposed on the inner wall of the third hole segment 113.

In order to further stably connect the exhaust tube 40 and the valve seat 10, the pressure limiting valve of the present embodiment further includes an elastic clip (not shown in the figure) fixed on the sidewall of the exhaust tube 40, the elastic clip is compressed when the exhaust tube 40 is just inserted into the third hole section 113, and the elastic clip is reset and locked on the inner wall surface of the mounting hole 21 after the exhaust tube 40 enters the mounting hole 21, so as to prevent the valve seat 10 from separating from the exhaust tube 40 and falling off.

During actual assembly, the valve cover 20 and the valve seat 10 in the embodiment are fixed together through threaded connection, so that the pressure limiting valve is simple in structure and convenient to disassemble and assemble for cleaning.

Of course, in other embodiments of the present invention, the valve cover 20 and the valve seat 10 may be fixedly connected by welding, and other modifications within the spirit of the present invention are within the scope of the present invention.

According to the above embodiments, it can be known that the pressure limiting valve can perform the structure of controlling the exhaust in two stages by reducing the finish machining of the pressure limiting valve float valve 30 and the exhaust pipe 40, after one float valve 30 of the pressure limiting valve on the pot cover assembly floats upwards, the rest float valves 30 can exhaust the cold air in the rest pot, namely the pressure in the pot can be regulated and controlled before the maximum working pressure is reached, which can be regulated by the physical structure without the control of electric appliances depending on gravity.

In the stage before the electric pressure cooker is pressed upwards, the valve seat 10 of the pressure limiting valve is placed at the upper end of the air outlet pipe 40, the valve seat 10 is provided with a sealing gasket 50 which can seal the air outlet of the air outlet pipe 40, so that the air in the electric pressure cooker is guided into the valve cover 20 through the air outlet pipe 40 and is discharged through the air outlet channel of the floating valve 30, the floating valve 30 can be lifted upwards by air flow after the air flow is discharged, and the sealing ring 32 abuts against the mounting hole 21 on the valve cover 20 after the floating valve 30 is lifted so as to seal the air in. While the two float valves 30 have different weights, the light float valve 30 floats first and then floats heavy. Therefore, cold air in the electric pressure cooker can be exhausted as far as possible by floating upwards in different stages, and the cooking effect is better and ideal.

At the stage after the pressure of the electric pressure cooker is pressed up, the floating valve 30 floats upwards, the sealing ring 32 is also sealed, and the internal air pressure of the whole pressure limiting valve is consistent with the air pressure of the inner cooker. After the cooking procedure is finished, pressure exists in the electric pressure cooker, the whole process is sealed, gas does not flow out, and rapid exhaust is needed in a manual exhaust stage. The lid assembly has an exhaust button and other components capable of jacking up one end of the bottom of the pressure limiting valve seat 10, and a half area of the air outlet of the exhaust pipe 40 is separated from the sealing pad 50 (as shown in fig. 9, the sealing pad 50 and the air outlet of the exhaust pipe 40 have a certain angle when seen from the section directly). The gas in the electric pressure cooker is discharged in two parts, one part enters the pressure limiting valve, the pressure limiting valve 30 falls down and is discharged from the exhaust channel of the float valve 30, and the largest part of the gas is discharged from the gap between the exhaust pipe 40 and the valve seat 10.

It can be seen that the cold air in the cooking utensil of the present invention can be exhausted from the exhaust pipe 40 into the cavity 22 to blow the two float valves 30, the float valves 30 are of a valve-stop structure, an exhaust passage is arranged in the middle, the air in the exhaust pipe 40 blows the float valve 30, the float valve 30 floats up under the action of the air flow, the two float valves 30 have different weights, so that the light float valve floats up first and then the heavy float valve floats up last, and the purpose of effectively exhausting the cold air in the cooking utensil is achieved.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

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

Claims

1. A pressure limiting valve, comprising:

the valve seat (10), wherein an air inlet hole (11) is formed in the valve seat (10);

the valve cover (20) is buckled on the valve seat (10) and surrounds the valve seat (10) to form a cavity (22), at least two mounting holes (21) are formed in the top end of the valve cover (20), and the mounting holes (21) are communicated with the cavity (22);

the floating valve (30), at least two the floating valve (30) are installed one-to-one in at least two the mounting hole (21), be provided with the exhaust passage on the floating valve (30), floating valve (30) have with the sealed position of mounting hole (21) shutoff and make the exhaust passage with the exhaust position of cavity (22) intercommunication, floating valve (30) are followed the axial of mounting hole (21) is floated from top to bottom in order to switch between sealed position and exhaust position.

2. The pressure limiting valve of claim 1 wherein the float valve (30) comprises:

the valve body (31), the said exhaust passage is set up on the said valve body (31), and the inlet end of the said exhaust passage locates on side wall of the said valve body (31);

sealing washer (32), sealing washer (32) cover is established the bottom of valve body (31), just the external diameter of sealing washer (32) is greater than the internal diameter of mounting hole (21), just exhaust passage's entry end is higher than sealing washer (32).

3. Pressure limiting valve according to claim 2, characterized in that the valve body (31) comprises:

a first cylindrical section (313), the first cylindrical section (313) being inserted into the mounting hole (21);

a second cylindrical section (314), the second cylindrical section (314) being coaxially arranged with the first cylindrical section (313), the second cylindrical section (314) being located at a top end of the first cylindrical section (313), an outer diameter of the second cylindrical section (314) being larger than an inner diameter of the mounting hole (21) and an outer diameter of the first cylindrical section (313).

4. The pressure limiting valve according to claim 2, characterized in that the top of the valve body (31) is provided with a blind hole (311) recessed downwards, the valve body (31) is further provided with a connecting hole (312), the connecting hole (312) extends from the side wall surface of the valve body (31) to the blind hole (311), and the blind hole (311) and the connecting hole (312) form the exhaust passage.

5. The pressure limiting valve according to claim 4, wherein the connection hole (312) is plural, and the plural connection holes (312) are provided at intervals along the outer periphery of the blind hole (311).

6. Pressure limiting valve according to claim 1, characterized in that the float valves (30) are two, the mass of the two float valves (30) being different.

7. The pressure limiting valve of claim 1 further comprising:

an exhaust pipe (40), the exhaust pipe (40) being detachably installed at the intake hole (11).

8. The pressure limiting valve according to claim 7, characterized in that the inlet orifice (11) comprises:

a first bore section (111);

a second bore section (112), the second bore section (112) being located at a bottom end of the first bore section (111), the second bore section (112) having an inner diameter greater than the inner diameter of the first bore section (111);

the pressure limiting valve further comprises:

sealing gasket (50), sealing gasket (50) are fixed the top of second hole section (112), be provided with on sealing gasket (50) with through-hole (51) that first hole section (111) correspond.

9. The pressure limiting valve according to claim 8, wherein the air inlet hole (11) further comprises:

a third hole section (113), wherein the third hole section (113) is positioned at the bottom end of the second hole section (112), the inner diameter of the third hole section (113) is smaller than that of the second hole section (112), and a groove (114) is formed in the inner wall of the third hole section (113);

and the outer side wall surface of the exhaust pipe (40) is provided with a convex block (41) corresponding to the groove (114).

10. The pressure limiting valve according to claim 9, wherein the grooves (114) and the projections (41) are plural, and the plural grooves (114) and the plural projections (41) are provided in one-to-one correspondence.

11. Pressure limiting valve according to claim 10, characterized in that a plurality of said projections (41) are arranged at intervals along the same circumference.

12. Pressure limiting valve according to any of claims 1 to 11, characterized in that the valve cover (20) and the valve seat (10) are fixed together by a threaded connection.

13. A cooking appliance comprising a limit valve, characterized in that the limit valve is as claimed in any one of claims 1 to 12.