CN210902589U

CN210902589U - Negative pressure control valve, pot cover assembly and cooking utensil

Info

Publication number: CN210902589U
Application number: CN201921351449.7U
Authority: CN
Inventors: 梁志佳; 刘化勇; 黄韦铭; 罗飞龙; 邢胜华; 严若飞; 吴良柳; 羊小亮
Original assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co Ltd
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-07-03
Anticipated expiration: 2029-08-19

Abstract

The utility model discloses a negative pressure control valve, pot cover subassembly and cooking utensil, the pot cover subassembly is used in cooking utensil, and the lid closes cooking utensil's cooking seat's open end sets up, with the cooking seat encloses jointly and closes and form the culinary art chamber, the pot cover subassembly includes pot cover main part and negative pressure control valve, the negative pressure control valve sets up the pot cover main part, the inlet port of negative pressure control valve be used for with cooking utensil's culinary art chamber intercommunication, the gas leakage hole of negative pressure control valve is used for with external intercommunication the outside pressure of valve plug member (promptly the gas leakage hole outside pressure) is greater than the inboard pressure of valve plug member (promptly when the difference reaches the setting value between the two, the valve plug member of negative pressure control valve is driven and is opened the gas leakage hole. The utility model provides a technical scheme can inject the negative pressure in the culinary art intracavity in the certain limit, avoids the negative pressure in culinary art chamber too big.

Description

Negative pressure control valve, pot cover assembly and cooking utensil

Technical Field

The utility model discloses cooking utensil technical field, in particular to negative pressure control valve, pot cover subassembly and cooking utensil.

Background

The existing cooking appliances are various in types, and there are cooking appliances in which a cooking cavity can form negative pressure, and the cooking appliances can be called as "negative pressure cooking appliances", however, when the existing negative pressure cooking appliances are used, it is difficult to control the magnitude of the negative pressure, once the negative pressure is too large, after the final cooking is finished, the cover is difficult to open due to too large binding force between the pot cover and the cooking base, or, the negative pressure is too large, so that parts of the cooking appliances receive large external force generated due to the negative pressure, and further the service lives of the parts are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a negative pressure control valve, pot cover subassembly and cooking utensil, aim at can be with the negative pressure control in the setting value in the culinary art chamber, avoid the negative pressure too big and cause the problem of not good influence.

In order to achieve the above object, the present invention provides a vacuum pressure control valve, including:

the valve body is provided with an air inlet and an air leakage hole which are communicated with the inner cavity of the valve body; and the number of the first and second groups,

the valve plug part is arranged in the valve body and used for sealing the air leakage hole, the valve plug part is close to or far away from the direction of the air leakage hole and can be movably arranged, so that the outside pressure of the valve plug part is greater than the inside pressure of the valve plug part and the difference between the inside pressure and the inside pressure reach a set value, and the valve plug part is far away from the direction of the air leakage hole and can be moved to be opened.

Optionally, the valve plug member comprises:

the sealing block is arranged in the inner cavity of the valve body and is used for sealing the air leakage hole; and the number of the first and second groups,

and the elastic supporting piece is fixedly arranged in the inner cavity of the valve body, is positioned between the sealing block and the inner wall of the valve body and is used for resetting the sealing block to the position for sealing the air leakage hole.

Optionally, the elastic support member is located on a side of the sealing block facing away from the air leakage hole, and is used for elastically supporting the sealing block.

Optionally, the sealing block is in sealing abutment with the inner wall of the valve body, which is provided with the air leakage hole, so as to seal the air leakage hole; and/or the presence of a gas in the gas,

the sealing block is provided with a guide part which is in clearance fit with the air leakage hole.

Optionally, the elastic support member is an elastic resetting member, one end of the elastic resetting member is mounted to the sealing block, and the other end of the elastic resetting member is mounted to the inner wall of the inner cavity of the valve body.

Optionally, the elastic supporting element includes a supporting seat and an elastic element, the elastic element is fixed in the valve body, and the supporting seat is supported between the sealing block and the elastic element.

Optionally, the supporting seat and the sealing block are respectively provided with a positioning protrusion and a positioning groove which are matched with each other; and/or the presence of a gas in the gas,

an annular supporting groove facing the air leakage hole is formed in the inner cavity of the valve body, one end, back to the sealing block, of the supporting seat is cylindrical and is matched with the annular supporting groove, the elastic piece is a spring, and the elastic piece is arranged in the supporting seat and is sleeved and supported in the annular supporting groove; and/or the presence of a gas in the gas,

the elastic piece is a spring.

Optionally, an annular protrusion surrounding the air leakage hole is convexly arranged on the inner wall of the valve body, which is provided with the air leakage hole, and the sealing block is in sealing abutment with the annular protrusion; and/or the presence of a gas in the gas,

the inner wall of the valve body, which is provided with the air leakage hole, is convexly provided with an annular bulge surrounding the air leakage hole, the sealing block is in sealing butt joint with the annular bulge, and the supporting area of the elastic supporting piece for supporting the sealing block laterally exceeds the annular bulge; and/or the presence of a gas in the gas,

the elastic supporting piece comprises a supporting seat and an elastic piece, the supporting seat is supported between the sealing block and the elastic piece, a supporting area of the supporting seat for supporting the sealing block can define a circular area, the diameter of the circular area is D1, and D1 is more than or equal to 8 mm.

Optionally, the valve body is further provided with an air outlet communicated with the inner cavity of the valve body.

Optionally, an anti-blocking body is arranged in the valve body and at the air inlet, and an air gap is reserved between the anti-blocking body and the inner cavity of the valve body.

Optionally, the anti-blocking body is spherical; and/or the presence of a gas in the gas,

the anti-blocking body is rotatably arranged in the valve body; and/or the presence of a gas in the gas,

the air inlet is arranged at the lower end of the valve body, an upward step part is formed in the valve body and on the air inlet, and the anti-blocking body is arranged on the step part.

The utility model provides a pot cover subassembly again, be used in cooking utensil, the lid closes cooking utensil's culinary art seat's open end sets up, with the culinary art seat encloses jointly and closes and form the culinary art chamber, the pot cover subassembly includes:

a pot cover main body; and the number of the first and second groups,

the negative pressure control valve is arranged on the cooker cover main body, an air inlet hole of the negative pressure control valve is used for being communicated with a cooking cavity of the cooking appliance, an air leakage hole of the negative pressure control valve is used for being communicated with the outside, and the negative pressure control valve is any one of the negative pressure control valves.

Optionally, the valve body is further provided with an air outlet hole communicated with the inner cavity of the valve body, an air passage is formed between the air outlet hole and the air inlet hole, the negative pressure control valve is installed on the pot cover main body, and the air passage is connected with an internal passage of the pot cover main body to form an air exhaust passage.

Optionally, an air hole is formed in the inner side of the pot cover main body to form an inlet of the air exhaust channel, the air hole is communicated with the air inlet hole through a cavity channel, and the air hole and the air inlet hole are arranged in a laterally staggered manner; and/or the presence of a gas in the gas,

the inner side of the pot cover main body is provided with a plurality of air holes to form an inlet of the air exhaust channel, and the air holes are communicated with the air inlet holes; and/or the presence of a gas in the gas,

the inner side of the pot cover main body is provided with an air hole to form an inlet of the air exhaust channel, and the section size of the air hole in the air exhaust channel is the minimum; and/or the presence of a gas in the gas,

the inner side of the pot cover main body is provided with an air hole to form an inlet of the air exhaust channel, the diameter of the air hole is D2, and D2 is more than 0 and less than or equal to 3 mm.

The utility model also provides a cooking utensil, include:

the cooking seat is provided with an opening at one end; and the number of the first and second groups,

the pot cover assembly is used for covering the opening end of the cooking seat;

the cooking seat is provided with the negative pressure control valve, or the pot cover assembly is the pot cover assembly.

Optionally, the cooking appliance is one of an electric rice cooker, a pressure cooker, an electric kettle and an electric stewpan.

The technical scheme of the utility model among, through setting up negative pressure control valve at cooking utensil, when the negative pressure value in culinary art chamber reaches a limit value, be promptly the outside pressure of valve plug member (promptly the gas leakage hole outside pressure) is greater than the inboard pressure of valve plug member (promptly the valve body inner chamber pressure) and difference between the two reach the setting value when, the valve plug member is to keeping away from gas leakage hole direction removes, in order to open the gas leakage hole to outside air can supply to culinary art chamber, in order to avoid the negative pressure in the culinary art intracavity is too big, promptly the technical scheme of the utility model, through negative pressure control valve makes the negative pressure value control in culinary art chamber is in a setting value.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of an embodiment of a lid assembly according to the present disclosure;

FIG. 2 is a schematic cross-sectional view taken along A-A of FIG. 1;

FIG. 3 is a partial view of FIG. 2;

fig. 4 is a partial view of another embodiment of a lid assembly according to the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Pot cover assembly	212	Air leakage hole
1	Pot cover main body	213	Air outlet
				1a	Upper cover	22	Valve plug
1b	Cover plate		221					Sealing block
				11	Air hole	221a	Guide part
2	Negative pressure control valve	2211	Positioning groove
				21	Valve body	222	Elastic support
21a	Annular supporting groove	222a	Supporting seat
				21b	Annular protrusion	222b	Elastic piece
21c	Step part		2221					Positioning projection
				211	Air intake	23	Anti-blocking body

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a cooking utensil, cooking utensil can but not be limited to electric rice cooker, pressure cooker, electric kettle and electric saucepan etc..

Cooking utensil includes culinary art seat and pot cover subassembly, and pot cover subassembly lid closes the culinary art seat to form the culinary art chamber, use cooking utensil as electric rice cooker example, the culinary art seat includes the base and locates the interior pot in the base, and the pot cover subassembly closes the culinary art chamber with interior pot encloses jointly.

In the existing cooking appliance, in order to make the cooking appliance have a good cooking effect, negative pressure is required to be formed in the cooking cavity, and a specific way of forming the negative pressure is not limited, for example, an air extraction device may be provided to extract air. Use air exhaust device to bleed as the example, in air exhaust device carries out the air exhaust in-process, the pressure in culinary art chamber can reduce gradually, if in case negative pressure is too little, can make cooking utensil's spare part, for example the pot cover main part can receive great pressure and warp too big to the negative pressure is too big, and the cohesion is great between pot cover subassembly and the culinary art seat, so can be difficult to uncap.

Therefore, the utility model provides a pot cover assembly, pot cover assembly is provided with the negative pressure control valve. Please refer to fig. 1 to 3, in an embodiment of the present invention, the pot cover assembly 100 includes a pot cover main body 1 and a negative pressure control valve 2, the negative pressure control valve 2 is installed in the pot cover main body 1, the air inlet 211 of the negative pressure control valve 2 is used for communicating with a cooking cavity of a cooking appliance, the air leakage hole 212 of the negative pressure control valve 2 is used for communicating with the outside, the negative pressure control valve 2 includes a valve body 21 and a valve plug 22, the air inlet 211 and the air leakage hole 212 are disposed in the valve body 21 and communicate with an inner cavity of the valve body 21, the valve plug 22 is disposed in the valve body 21 and seals the air leakage hole 212, the valve plug 22 is elastically movable in a direction close to or far away from the air leakage hole 212, so that when the outside pressure of the valve plug 22 is greater than the inside pressure of the valve plug 22 and the difference between the two reaches a set.

The technical scheme of the utility model among, set up negative pressure control valve 2 at cooking utensil through the setting, when the negative pressure value in culinary art chamber reaches a limit value, when the difference between the outside pressure (leaking gas pocket 212 outside pressure promptly) of valve plug 22 and the inboard pressure (21 inner chamber pressure of valve body promptly) of valve plug 22 reaches the setting value promptly, leaking gas pocket 212 is opened by the drive to the valve plug 22 of negative pressure control valve 2 to outside air can supply to culinary art chamber, too big in order to avoid the negative pressure in the culinary art intracavity, also promptly the technical scheme of the utility model, make the negative pressure value control in culinary art chamber in a setting value through negative pressure control valve 2.

Moreover, the valve plug 22 is directly and elastically movably arranged in the direction close to or far away from the air leakage hole 212, so that the negative pressure control valve 2 can be automatically opened under the condition of low negative pressure and can be automatically closed under the condition of supplementing external air through a mechanical structure, and the implementation cost of the negative pressure control valve 2 is reduced.

The specific structure and installation manner of the valve plug 22 are not limited as long as the valve plug 22 can seal the leakage hole 212 in the initial state, and the leakage hole 212 can be opened when the difference between the outside pressure of the leakage hole 212 and the inner cavity pressure of the valve body 21 reaches a set value, for example, the valve plug 22 can be directly made of an elastic material, such as rubber or silicon rubber, and the valve plug 22 contracts and deforms and the leakage hole 212 opens when the pressure difference between the outside of the leakage hole 212 and the inner cavity of the valve body 21 is large, or the sealing portion of the valve plug 22 and the portion providing elastic return can be separately provided, which will be described in detail in the following sections.

In this embodiment, the valve plug 22 includes a sealing block 221 and an elastic supporting member 222, the sealing block 221 is disposed in the inner cavity of the valve body 21 and seals the air leakage hole 212, and the elastic supporting member 222 is fixedly mounted in the inner cavity of the valve body 21 and located between the sealing block 221 and the inner wall of the valve body 21 for resetting the position of the sealing block 221 to the position of the air leakage hole 212. Through the resilient support 222. The sealing is realized by the sealing block 221, the sealing block 221 is provided with an elastic supporting force by the elastic supporting piece 222, the supporting force of the elastic supporting piece 222 determines the vacuum pressure controlled by the negative pressure control valve 2,

further, in the present embodiment, the elastic supporting element 222 is located on a side of the sealing block 221 facing away from the air leakage hole 212, and is used for elastically supporting the sealing block 221. In this embodiment, the elastic supporting member 222 is located on a side of the sealing block 221 opposite to the air leakage hole 212, so that the elastic supporting member 222 can be conveniently disposed, obviously, the design is not limited thereto, the elastic supporting member 222 can also be located on a side of the sealing block 221 facing the air leakage hole 212, at this time, when the outside pressure of the air leakage hole 212 is larger than the difference between the pressures of the valve body 21, the elastic member 222b is under the action of a pulling force, and specifically, the elastic member 222b can be disposed in the air leakage hole 212, or mounted on the inner wall of the inner cavity of the valve body 21 where the air leakage hole 212 is disposed.

The specific structure and form of the elastic supporting member 222 are not limited, and may be a single piece, such as but not limited to a spring, an elastic silicone member, an elastic rubber member, etc., as in the embodiment provided in fig. 4, the elastic supporting member 222 is an elastic restoring member (specifically, a spring), one end of the elastic restoring member is mounted to the sealing block 221, and the other end of the elastic restoring member is mounted to the inner wall of the inner cavity of the valve body 21, although the elastic supporting member 222 may also be formed by combining several components, as will be described later.

In this embodiment, the elastic supporting member 222 includes a supporting seat 222a and an elastic member 222b, the elastic member 222b is fixed in the valve body 21, and the supporting seat 222a is supported between the sealing block 221 and the elastic member 222 b. The material of the sealing block 221 is not limited, the material of the supporting base 222a may be a hard material such as plastic or metal, the elastic element 222b provides an elastic restoring force for the supporting base 222a, and the specific material and structure of the elastic element 222b are not limited, for example, the elastic element 222b may be a spring, an elastic rubber, or the like. The supporting seat 222a can disperse the acting force of the elastic element 222b on the sealing block 221 and act on the sealing block 221, and particularly, when the sealing block 221 is made of an elastic material, the supporting seat 222a can disperse the supporting force of the elastic element 222b and act on the sealing block 221, thereby avoiding local deformation of the sealing block 221.

Alternatively, in this embodiment, the supporting seat 222a and the sealing block 221 are respectively provided with a positioning protrusion 2221 and a positioning groove 2211, which are matched with each other, and preferably, the positioning protrusion 2221 and the positioning groove 2211 are distributed in the middle area of the supporting seat 222a and the sealing block 221, respectively, so as to facilitate the positioning between the supporting seat 222a and the sealing block 221.

Optionally, in this embodiment, in order to improve the stability of the supporting seat 222a in the moving direction, an annular supporting groove 21a facing the air leakage hole 212 is formed in the inner cavity of the valve body 21, one end of the supporting seat 222a facing away from the sealing block 221 is cylindrical and is engaged with the annular supporting groove 21a, the elastic element 222b is a spring, and the elastic element 222b is disposed in the supporting seat 222a and is sleeved in the annular supporting groove 21a, that is, the annular supporting groove 21a provides mounting support for the spring on one hand and provides moving guide for the supporting seat 222a on the other hand.

In addition, in another embodiment of the present invention provided in fig. 4, the sealing block 221 has a guiding portion 221a with a sliding clearance fit with the air leakage hole 212, a clearance fit is adopted between the guiding portion 221a and the air leakage hole 212, and the guiding portion 221a is a movable guide for the sealing block 221. Also, in this embodiment, the elastic support 222 is one-piece, and in particular, a spring.

The sealing manner and the sealing structure between the sealing block 221 and the air leakage hole 212 are not limited, and may be that the sealing block 221 is in sealing abutment with the inner wall of the valve body 21 provided with the air leakage hole 212, so as to seal the air leakage hole 212, or the sealing block 221 is directly arranged to cover the inner port of the air leakage hole 212, or the sealing structure is arranged on the inner wall of the valve body 21 provided with the air leakage hole 212 or the sealing block 221, in this embodiment, the inner wall of the valve body 21 provided with the air leakage hole 212 is convexly provided with an annular protrusion 21b surrounding the air leakage hole 212, the sealing block 221 is in sealing abutment with the annular protrusion 21b, the sealing abutment with the sealing block 221 is realized by arranging the annular protrusion 21b, the sealing of the air leakage hole 212 is relatively easy to realize, and certainly, in order to enhance the sealing effect, a.

Alternatively, in this embodiment, the supporting region of the elastic supporting member 222 supporting the sealing block 221 is laterally (i.e. perpendicular to the moving direction of the sealing block 221, i.e. horizontally as shown in the figure) disposed beyond the annular protrusion 21b, and preferably, the elastic supporting member 222 is laterally disposed beyond the annular protrusion 21b at all sides (i.e. D1 > D0 in fig. 3), so that the acting region of the elastic supporting member 222 on the sealing block 221 is laterally beyond the acting region of the annular protrusion 21b on the sealing block 221, i.e. the deformation region of the sealing block 221 is laterally beyond the region defined by the annular protrusion 21b, so that the sealing block 221 is not deformed into the annular protrusion 21b due to the deformation region of the sealing block 221 within the region defined by the annular protrusion 21b, especially, when the sealing block 221 is made of an elastic material, the sealing block 221 is pressed into the region surrounded by the annular protrusion 21b, possibly catching the annular protrusion 21 b.

The supporting area of the elastic support base 222a determines how large (the size of the cross-sectional area) the elastic member 222b can be, and the larger the area of the supporting area is, the larger the elastic member 222b can be set, so as to provide the larger elastic strength, and the higher the accuracy of the negative pressure control, for this reason, optionally, in this embodiment, the supporting area of the support base 222a supporting the sealing block 221 may define a circular area, the diameter of the circular area is D1, D1 is greater than or equal to 8mm, specifically, when the supporting area is a circle, the supporting area is a circular area, and when the supporting area is a non-circular area, the circular area is an area corresponding to the circle inscribing the supporting area.

In this embodiment, valve body 21 still is equipped with the venthole 213 that the intercommunication valve body 21 inner chamber set up, form the air flue between venthole 213 and the inlet port 211, negative pressure control valve 2 installs inside pot cover main part 1 (specifically, pot cover main part 1 includes upper cover 1a and apron 1b, negative pressure control valve 2 installs on apron 1 b), and the air flue is connected with pot cover main part 1's inside passage and is formed air exhaust passage, for this, can directly install negative pressure control valve 2 on pot cover main part 1 original channel that forms air exhaust passage, it is comparatively convenient to install.

In this embodiment, the inner side of the pot cover body 1 is provided with the air hole 11 to form an inlet of the air exhaust channel, the air hole 11 is communicated with the air inlet hole 211 through a channel, the air hole 11 and the air inlet hole 211 are arranged in a laterally staggered manner, so that the food material in the cooking cavity is prevented from directly entering the air inlet hole 211 of the valve body 21 through the air hole 11.

Alternatively, in the present embodiment, the air holes 11 are provided in plural to ensure a sufficiently large gas flux, and further, the plural air holes 11 are all arranged in a laterally (i.e., horizontally in the drawing) staggered manner from the air inlet holes 211.

The air hole 11 is used as the inlet of the air pumping channel, and the air hole 11 can be set to be the smallest section size in the air pumping channel, so that the situation that the food materials entering from the air hole 11 block the air pumping channel can be avoided.

Considering the size of the food material, optionally, the diameter of the air hole 11 is D2, 0 < D2 ≦ 3 mm.

Optionally, in this embodiment, an anti-blocking body 23 is disposed in the valve body 21 and at the air inlet 211, an air gap is formed between the anti-blocking body 23 and the inner cavity of the valve body 21, and the anti-blocking body 23 prevents large food from entering the air inlet 211 to block the inner cavity of the valve body 21, or the large food is collided and crushed.

Preferably, the anti-blocking body 23 is spherical, so that air flow or food material passage can be facilitated to reduce air resistance.

Preferably, in other embodiments of the present invention, the anti-blocking body 23 is rotatably installed in the valve body 21, so that the anti-blocking body 23 is driven to rotate when the gas passes through, and the food adhered to the anti-blocking body 23 can be thrown out.

Alternatively, in the present embodiment, the air intake hole 211 is provided at the lower end of the valve body 21, an upward step portion 21c is formed in the air intake hole 211 in the valve body 21, and the anti-blocking body 23 is disposed at the step portion 21c, so that it is possible to eliminate the need for an additional structure to fix and install the anti-blocking body 23.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. A negative pressure control valve, comprising:

2. The negative pressure control valve of claim 1, wherein the valve plug member comprises:

3. The negative pressure control valve of claim 2, wherein the elastic support member is located on a side of the sealing block facing away from the leakage hole, and elastically supports the sealing block.

4. The negative pressure control valve of claim 3, wherein the sealing block is in sealing abutment with an inner wall of the valve body provided with the leakage hole to seal the leakage hole; and/or the presence of a gas in the gas,

5. The negative pressure control valve of claim 3, wherein the elastic support member is an elastic restoring member having one end mounted to the sealing block and the other end mounted to an inner wall of the inner chamber of the valve body.

6. The negative pressure control valve of claim 3, wherein the elastic support member includes a support seat and an elastic member, the elastic member being fixed in the valve body, the support seat being supported between the seal block and the elastic member.

7. The negative pressure control valve of claim 6, wherein the support seat and the sealing block are provided with a positioning protrusion and a positioning groove which are matched with each other; and/or the presence of a gas in the gas,

the elastic piece is a spring.

8. The negative pressure control valve of claim 3, wherein the inner wall of the valve body provided with the leakage hole is convexly provided with an annular bulge surrounding the leakage hole, and the sealing block is in sealing abutment with the annular bulge; and/or the presence of a gas in the gas,

9. The negative pressure control valve of claim 1, wherein the valve body further comprises an air outlet hole communicating with the inner cavity of the valve body.

10. The negative pressure control valve of claim 9, wherein an anti-clogging body is provided in the valve body at the air inlet, and an air gap is reserved between the anti-clogging body and the valve body inner chamber.

11. The negative pressure control valve of claim 10, wherein the anti-clogging body is spherical; and/or the presence of a gas in the gas,

12. A lid assembly for a cooking appliance for closing an open end of a cooking receptacle of the cooking appliance to cooperatively enclose a cooking cavity with the cooking receptacle, the lid assembly comprising:

a pot cover main body; and the number of the first and second groups,

the negative pressure control valve of any one of claims 1 to 11, which is provided at the lid main body, an air inlet hole of the negative pressure control valve is used for communicating with a cooking cavity of the cooking appliance, and an air leakage hole of the negative pressure control valve is used for communicating with the outside.

13. The lid assembly as claimed in claim 12, wherein the valve body further has an air outlet communicating with the inner cavity of the valve body, an air passage is formed between the air outlet and the air inlet, the negative pressure control valve is mounted on the lid body, and the air passage communicates with the inner passage of the lid body to form an air exhaust passage.

14. The lid assembly of claim 13, wherein the lid body is provided with an air hole at an inner side thereof to form an inlet of the air exhaust passage, the air hole is communicated with the air inlet hole through a cavity, and the air hole and the air inlet hole are laterally staggered; and/or the presence of a gas in the gas,

15. A cooking appliance, comprising:

the pot cover assembly is used for covering the open end of the cooking seat to form a cooking cavity together with the cooking seat in an enclosing manner;

wherein the lid assembly is as claimed in any one of claims 12 to 14.