CN110870697B - Exhaust valve, pot cover assembly, cooking utensil and exhaust valve core - Google Patents

Abstract

The invention discloses an exhaust valve, a pot cover assembly, a cooking utensil and an exhaust valve core, wherein the exhaust valve comprises: the exhaust valve core comprises a valve core body and an adjusting head which can move relative to the valve core body; the exhaust valve cap is arranged on the exhaust valve core and used for opening and closing the exhaust valve core; a driving member to move the adjustment head by driving the adjustment head to support the exhaust bonnet on one of the adjustment head and the valve cartridge body; wherein a sealing area formed by the support of the exhaust bonnet on the valve core body is different from a sealing area formed by the support of the exhaust bonnet on the adjusting head. The exhaust valve provided by the embodiment of the invention has the advantages of adjustable exhaust pressure, low cost and high reliability.

Description

Exhaust valve, pot cover assembly, cooking utensil and exhaust valve core

Technical Field

The invention relates to the technical field of electric appliance manufacturing, in particular to an exhaust valve, a pot cover assembly with the exhaust valve, a cooking utensil with the pot cover assembly and an exhaust valve core.

Background

A cooking appliance such as a pressure cooker usually has a constant cooking pressure, but different users have different requirements for the taste of food materials, so that the pressure cooker having only one constant pressure state cannot meet different requirements for the taste of food materials of different users, and cannot meet the requirements for the pressure for cooking different food materials such as soft and hard food materials.

Therefore, a pressure cooker with adjustable exhaust pressure (pressure limit value) is proposed in the related art, which utilizes magnetic field magnetic force to adjust the pressure limit value, but not only has higher cost, but also the magnetic field strength of the magnet is influenced by high-temperature environment, and high-temperature condition is inevitable in the working process of the pressure cooker, so that the adjustment of the pressure limit value is unstable and has larger deviation.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the exhaust valve, the exhaust pressure of the exhaust valve is adjustable, the cost is low, and the reliability is high.

The invention also provides a cooker cover assembly with the exhaust valve.

The invention also provides a cooking appliance with the pot cover assembly.

The invention also provides an exhaust valve core.

An embodiment according to a first aspect of the invention proposes an exhaust valve comprising: the exhaust valve core comprises a valve core body and an adjusting head which can move relative to the valve core body; the exhaust valve cap is arranged on the exhaust valve core and used for opening and closing the exhaust valve core; a driving member to move the adjustment head by driving the adjustment head to support the exhaust bonnet on one of the adjustment head and the valve cartridge body; wherein a sealing area formed by the exhaust bonnet supported on the valve core body is different from a sealing area formed by the exhaust bonnet supported on the adjusting head.

According to the exhaust valve provided by the embodiment of the invention, the exhaust valve core is provided with the valve core body and the movable adjusting head which are separated, the driving piece is arranged, the adjusting head can be driven by the driving piece to move, so that one of the adjusting head and the valve core body is selected to support the exhaust valve cap, the sealing area between the exhaust valve cap and the exhaust valve core can be adjusted, the exhaust pressure is adjusted, different cooking pressures can be adjusted according to different users and different food materials, and compared with an adjusting mode of magnetic force of a magnetic field, the cost is lower, the influence of a high-temperature environment is eliminated, and the reliability is higher.

According to some embodiments of the present invention, the adjusting head (130) is sleeved on the outer periphery of the valve core body (120).

Furthermore, the outer peripheral surface of the valve core body is provided with a limiting table for supporting the adjusting head.

Furthermore, when the adjusting head (130) is supported on the limiting table (140), the adjusting head is at the lowest position, the upper end of the adjusting head (130) at the lowest position is not higher than the upper end of the valve core body (120), and when the driving element drives the adjusting head to move to the highest position, the upper end of the adjusting head is higher than the upper end of the valve core body.

According to some specific examples of the present invention, an inner diameter of the adjustment head is greater than or equal to an outer diameter of the valve cartridge body, and an inner diameter of an upper end of the adjustment head is greater than an inner diameter of an upper end of the valve cartridge body.

According to some specific examples of the invention, a sealing ring is arranged between the inner circumferential surface of the regulating head and the outer circumferential surface of the valve core body.

Furthermore, the outer peripheral surface of the valve core body is provided with an annular groove extending along the circumferential direction of the valve core body, and the sealing ring is sleeved on the valve core body and assembled in the annular groove.

According to some specific embodiments of the invention, the adjusting head is provided with a tooth groove, the driving element is a motor, a motor shaft of the motor is connected with a gear meshed with the tooth groove, and the motor drives the adjusting head to move relative to the valve core body (120) through the matching of the gear and the tooth groove.

Furthermore, the tooth socket is arranged on the outer peripheral surface of the adjusting head and is positioned at the lower end of the adjusting head.

According to some specific examples of this disclosure, the exhaust valve cap comprises: a valve housing into which the exhaust valve element extends; a valve cone mounted to the valve housing for opening and closing the exhaust valve spool; wherein, when the exhaust valve cap is supported by the case body the valve cone stretches into the case body, when the exhaust valve cap is supported by the regulation head the valve cone stretches into the regulation head.

According to some specific embodiments of the invention, a clamp spring is arranged in the exhaust valve cap, the exhaust valve core penetrates through the clamp spring, the adjusting head is provided with an anti-falling boss located above the clamp spring, and at least a part of orthographic projection of the anti-falling boss and the clamp spring in a horizontal plane is overlapped.

According to some embodiments of the present invention, the exhaust valve core comprises a plurality of the adjusting heads, the adjusting heads are sequentially sleeved on the valve core body from inside to outside along a radial direction of the valve core body, and the driving member drives the adjusting heads to move so that the exhaust valve cap is supported on one of the adjusting heads and the valve core body; wherein a sealing area formed by the exhaust bonnet (200) supported on the valve core body (120) and a sealing area formed by the exhaust bonnet (200) supported on each of the adjustment heads (130) are different from each other.

Further, the driving part is one and drives a plurality of adjusting heads to move independently; or the driving parts are multiple and drive the multiple adjusting heads to move in a one-to-one correspondence manner.

Embodiments according to the second aspect of the invention propose a lid assembly comprising a venting valve according to embodiments of the first aspect of the invention.

According to the pot cover assembly disclosed by the embodiment of the invention, different requirements of different users and different food materials on cooking pressure can be met by utilizing the exhaust valve disclosed by the embodiment of the first aspect of the invention, and the pot cover assembly is low in cost and high in reliability.

Embodiments according to the third aspect of the invention propose a cooking appliance comprising a lid assembly according to embodiments of the second aspect of the invention.

According to the cooking appliance provided by the embodiment of the invention, by utilizing the pot cover assembly provided by the embodiment of the second aspect of the invention, different requirements of different users and different food materials on cooking pressure can be met, and the cooking appliance is low in cost and high in reliability.

An embodiment according to a fourth aspect of the present invention proposes an exhaust valve spool comprising: a valve core body; an adjustment head movable relative to the valve cartridge body to cause an exhaust valve cap to be supported on one of the adjustment head and the valve cartridge body by moving the adjustment head; wherein a sealing area formed by the support of the exhaust bonnet on the valve core body is different from a sealing area formed by the support of the exhaust bonnet on the adjusting head.

According to the exhaust valve core provided by the embodiment of the invention, the exhaust pressure can be favorably regulated, so that different requirements of different users and different food materials on cooking pressure can be met, and the exhaust valve core is low in cost and high in reliability.

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 an exploded view of a pot lid assembly according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view of a lid assembly in accordance with an embodiment of the present invention, wherein an exhaust bonnet is supported by a cartridge body.

Fig. 3 is an enlarged view of the area a in fig. 2.

FIG. 4 is a sealing area of the exhaust bonnet and the poppet body of FIG. 2.

FIG. 5 is a cross-sectional view of a pot lid assembly in which an exhaust valve cap is supported by a regulator head according to an embodiment of the present invention.

Fig. 6 is an enlarged view of the region B in fig. 5.

FIG. 7 is a sealing area of the exhaust bonnet and the adjustment head of FIG. 2.

Fig. 8 is a sectional view of a discharge valve according to another embodiment of the present invention.

Reference numerals:

a pot cover 1,

An exhaust valve 10,

An exhaust valve core 100, an anti-drop boss 110, a valve core body 120, an adjusting head 130, a limit table 140, a sealing ring 150, a tooth groove 160, a,

An exhaust valve cap 200, a valve housing 210, a valve cone 220, a snap spring 230, a snap groove 240, a snap ring,

A drive 300, a gear 310.

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 functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of illustrating the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, as used herein, refer to an orientation or positional relationship as shown in the drawings, which is used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements can be directly connected with each other or indirectly connected with each other through an intermediate medium, and the two elements can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A cooking appliance, which may be a pressure cooker, according to an embodiment of the present invention is described below with reference to the accompanying drawings.

As shown in fig. 1, the cooking appliance according to the embodiment of the present invention includes a pot body and a pot cover assembly, wherein the pot cover assembly includes a pot cover 1 and an exhaust valve 10, and the exhaust valve 10 may be disposed on the pot cover 1 of the cooking appliance.

As shown in fig. 1 to 8, the exhaust valve 10 according to the embodiment of the present invention includes an exhaust valve spool 100, an exhaust valve bonnet 200, and a driver 300.

The exhaust valve core 100 may be disposed on the pot cover 1, the exhaust valve core 100 has an exhaust passage and both ends of the exhaust passage are open, and when the pot cover 1 is disposed on the pot body, gas in the pot body may be exhausted through the exhaust passage of the exhaust valve core 100. The exhaust valve cartridge 100 includes a cartridge body 120 and an adjustment head 130 provided to the cartridge body 120 to be movable up and down, that is, the adjustment head 130 is movable up and down with respect to the cartridge body 120. The exhaust valve cap 200 is disposed on the exhaust valve core 100 for opening and closing the exhaust valve core 100, that is, the exhaust valve cap 200 is pressed on the exhaust valve core 100 by its own gravity to close the exhaust passage of the exhaust valve core 100 in a normal state, and when the pressure in the cooker body reaches a predetermined value (for example, when the exhaust valve cap 200 can be pushed up), the pressure in the cooker body pushes up the exhaust valve cap 200 to open the exhaust valve core 100. The actuator 300 moves by driving the adjustment head 130 to select one of the valve core body 120 and the adjustment head 130 to support the exhaust bonnet 200 when closing the exhaust valve core 100, even if the exhaust bonnet 200 is supported on one of the adjustment head 130 and the valve core body 120.

Specifically, when the exhaust bonnet 200 closes the exhaust valve core 100, if the upper end of the adjusting head 130 is lower than the upper end of the valve core body 120, the exhaust bonnet 200 presses on the valve core body 120 by its own weight to close the exhaust passage of the exhaust valve core 100; if the upper end of the adjusting head 130 is higher than the upper end of the valve core body 120, the exhaust valve cap 200 presses on the adjusting head 130 by its own weight to close the exhaust passage of the exhaust valve core 100, and the driving member 300 drives the adjusting head 130 to move up and down, thereby adjusting the relative positions of the upper end of the adjusting head 130 and the upper end of the valve core body 120 in the up-down direction.

Wherein, the sealing area of the valve core body 120 when the exhaust valve cap 200 is supported by the valve core body 120 is different from the sealing area of the adjusting head 130 when the exhaust valve cap 200 is supported by the adjusting head 130, that is, the sealing area formed by the exhaust valve cap (200) supported on the valve core body (120) is different from the sealing area formed by the exhaust valve cap (200) supported on the adjusting head (130). For example, the sealing area of the exhaust bonnet 200 with the poppet body 120 when supported by the poppet body 120 is smaller than the sealing area of the exhaust bonnet 200 with the adjustment head 130 when supported by the adjustment head 130.

Here, it is understood that the sealing area of the exhaust bonnet 200 and the valve body 120 refers to an area defined by a contact area of the exhaust bonnet 200 and the valve body 120, and an orthographic projection of the area in a plane orthogonal to the axial direction of the exhaust passage; the sealing area of the exhaust bonnet 200 and the adjustment head 130 is defined as an area defined by the contact area of the exhaust bonnet 200 and the adjustment head 130 as an orthographic projection of the area in a plane orthogonal to the axial direction of the exhaust passage.

For a pressure cooker, the discharge pressure (pressure limiting pressure) P is usually determined by two factors, i.e., P ═ G/S, where G is the weight of the discharge valve cap and S is the sealing area between the discharge valve cap and the discharge valve core. In the related art, the exhaust pressure is adjusted by changing a parameter G, for example, the weight G of the exhaust valve cap is indirectly changed by changing magnetic force.

According to the exhaust valve 10 of the embodiment of the invention, the exhaust valve core 100 is provided with the valve core body 120 and the movable adjusting head 130 which are separated, the driving element 300 is provided, the adjusting head 130 can be driven by the driving element 300 to move, so that one of the adjusting head 130 and the valve core body 120 is selected to support the exhaust valve cap 200, the sealing area between the exhaust valve cap 200 and the exhaust valve core 100 can be adjusted, the exhaust pressure can be adjusted, different cooking pressures can be adjusted according to different users and different food materials, and compared with an adjusting mode of magnetic force of a magnetic field, the cost is lower, the influence of a high-temperature environment is eliminated, and the reliability is higher.

According to the cooking appliance provided by the embodiment of the invention, different requirements of different users and different food materials on cooking pressure can be met by utilizing the exhaust valve 10 provided by the embodiment of the invention, and the cooking appliance is low in cost and high in reliability.

In some embodiments of the present invention, as shown in fig. 2-3 and 5-6, the adjusting head 130 is sleeved on the outer periphery of the valve core body 120, and the inner diameter of the adjusting head 130 is greater than or equal to the outer diameter of the valve core body 120, where it is understood that the relative relationship of the diameters is that the inner diameter of the upper end of the adjusting head 130 is greater than the inner diameter of the upper end of the valve core body 120 for the portion where the adjusting head 130 and the valve core body 120 are sleeved on each other. Thus, the adjustment head 130 is vertically movably mounted to the valve body 120 and has different sealing areas when supporting the exhaust bonnet 200.

The outer peripheral surface of the valve core body 120 is provided with a limit table 140, the limit table 140 can extend along the circumferential direction of the valve core body 120 to form a ring shape, the adjusting head 130 is located at the lowest position when the adjusting head 130 is supported on the limit table 140, so as to prevent the adjusting head 130 from sliding off the valve core body 120, and when the adjusting head 130 is located at the lowest position, the upper end of the adjusting head 130 is not higher than the upper end of the valve core body 120, so that when the adjusting head 130 is located at the lowest position, the exhaust valve cap 200 is supported by the valve core body 120, and when the driving element 300 drives the adjusting head 130 to move to the highest position, the upper end of the adjusting head 130 is higher than the upper end of the valve core body 120, that is, when the adjusting head 130 moves upwards to the upper end higher than the upper end of the valve core body 120, the exhaust valve cap 200 is supported by the adjusting head 130.

For example, as shown in fig. 2-4, when the cooking pressure required by food is higher, the exhaust valve 10 should have a higher exhaust pressure, the driving member 300 drives the adjusting head 130 to move downward, so that the upper end of the adjusting head 130 is lower than the upper end of the valve core body 120, the exhaust valve cap 200 is supported by the valve core body 120, the sealing area between the two is relatively smaller, i.e. the area of the circle corresponding to the diameter d1, and therefore, the pressure required to jack the exhaust valve cap 200 for exhausting is higher.

As shown in fig. 5-7, when the cooking pressure required by food is low, the exhaust valve 10 should have a low exhaust pressure, and the driving member 300 drives the adjusting head 130 to move upward, so that the upper end of the adjusting head 130 is higher than the upper end of the valve core body 120, and the exhaust valve cap 200 is supported by the adjusting head 130, and the sealing area between the two is relatively large, i.e. the area of the circle corresponding to the diameter d2, so that the pressure required for lifting the exhaust valve cap 200 to exhaust is low.

In some specific examples of the present invention, as shown in fig. 3 and 6, a sealing ring 150 is disposed between an inner circumferential surface of the adjusting head 130 and an outer circumferential surface of the valve core body 120, and the sealing ring 150 can perform the functions of sealing and speed reduction buffering.

Specifically, the outer circumferential surface of the valve body 120 is provided with an annular groove extending along the circumferential direction of the valve body 120, and the sealing ring 150 is sleeved on the valve body 120 and assembled in the annular groove, so that the sealing ring 150 is fixed on the valve body 120 and does not move along with the movement of the adjusting head 130, thereby ensuring the sealing reliability.

In some embodiments of the present invention, as shown in fig. 1-3 and fig. 6, the adjusting head 130 is provided with a tooth slot 160, the tooth slot 160 can be arranged on the outer side surface of the adjusting head 130 along the axial direction of the adjusting head 130, the driving member 300 is a motor, the motor can be installed inside the pot cover 1, the motor shaft of the motor is connected with a gear 310, the gear 310 is meshed with the tooth slot 160, and the motor utilizes the positive and negative rotation of the motor shaft, so as to drive the adjusting head 130 to move up and down relative to the valve core body 120 through the matching of the gear 310 and the tooth slot 160.

In order to facilitate the engagement between the gear 310 and the tooth groove 160, the tooth groove 160 is disposed on the outer circumferential surface of the adjustment head 130 and is located at the lower end of the adjustment head 130.

In some specific examples of the invention, as shown in fig. 3 and 6, the exhaust bonnet 200 includes a valve housing 210 and a valve cone 220.

A weight member may be provided in the valve housing 210 and the exhaust valve cartridge 100 extends upwardly into the valve housing 210. The valve cone 220 is installed at the valve case 210, and the lower end of the valve cone 220 is configured in a tapered shape having a large upper portion and a small lower portion in cross-sectional area for opening and closing the exhaust valve cartridge 100. When the exhaust bonnet 200 is supported by the valve core body 120, the valve cone 220 extends into the valve core body 120, when the exhaust bonnet 200 is supported by the adjusting head 130, the valve cone 220 extends into the adjusting head 130, and the depth of the valve cone 220 extending into the valve core body 120 is smaller than the depth of the valve cone 220 extending into the adjusting head 130, so that the sealing performance is ensured, and the exhaust pressure can be adjusted through the difference of sealing areas.

In some embodiments of the present invention, as shown in fig. 3 and 6, a snap spring 230 is disposed in the exhaust bonnet 200, the exhaust valve core 100 passes through the snap spring 230, the adjusting head 130 has a retaining boss 110 located above the snap spring 230, and at least a portion of orthographic projections of the retaining boss 110 and the snap spring 230 in a horizontal plane overlap, thereby preventing the exhaust bonnet 200 from falling off the exhaust valve core 100.

The inner circumferential surface of the exhaust valve cap 200 is provided with a snap groove 240, the snap groove 240 extends annularly on the inner circumferential surface of the valve housing 210 along the circumferential direction of the valve housing 210, the snap spring 230 is assembled on the snap groove 240, and the snap spring 230 is elastically fixed to the snap groove 240.

In some embodiments of the present invention, as shown in fig. 8, the exhaust valve core 100 includes a plurality of adjusting heads 130, the plurality of adjusting heads 130 are sequentially sleeved on the valve core body 120 from inside to outside along a radial direction of the valve core body 120, and the driving member 300 selectively supports the exhaust valve cap 200 when the exhaust valve core 100 is closed by driving the plurality of adjusting heads 130 to move, even if the exhaust valve cap 200 is supported on one of the plurality of adjusting heads 130 and the valve core body 120.

Wherein a sealing area with the valve core body 120 when the exhaust valve cap 200 is supported by the valve core body 120 and a sealing area with the regulating head 130 when the exhaust valve cap 200 is supported by each regulating head 130 are different from each other. In other words, the sealing area formed by the exhaust valve cap supported on the valve core body and the sealing area formed by the exhaust valve cap supported on each of the adjusting heads are different from each other.

Thus, the exhaust valve core 100 may realize the adjustment of a plurality of exhaust pressures, for example, as shown in fig. 8, the exhaust valve core 100 includes two adjusting heads 130, the sealing area of the two adjusting heads is a circular area corresponding to the diameter d1 when the exhaust valve cap 200 is supported by the valve core body 120, the sealing area of the two adjusting heads is a circular area corresponding to the diameter d2 when the exhaust valve cap 200 is supported by the inner adjusting head 130, and the sealing area of the two adjusting heads is a circular area corresponding to the diameter d3 when the exhaust valve cap 200 is supported by the outer adjusting head 130, wherein d3 > d2 > d1, thereby realizing the adjustment of three different exhaust pressures, of course, the present invention is not limited thereto, and the number of the adjusting heads 130 may be set according to actual conditions.

Alternatively, the driving member 300 is one and drives the plurality of adjustment heads 130 to move individually. It is also possible to provide the driving members 300 in the same number as the adjusting heads 130, and the plurality of driving members 300 drive the plurality of adjusting heads 130 to move in a one-to-one correspondence.

The following describes an exhaust valve cartridge 100 according to an embodiment of the present invention with reference to the accompanying drawings.

As shown in fig. 1 to 7, an exhaust valve spool 100 according to an embodiment of the present invention includes a spool body 120 and an adjustment head 130.

The adjusting head 130 is movably sleeved on the valve core body 120 up and down, and by moving the adjusting head 130, one of the valve core body 120 and the adjusting head 130 is selected to support the exhaust valve cap 200 when the exhaust valve core 100 is closed, even if the exhaust valve cap 200 is supported on one of the adjusting head 130 and the valve core body 120.

The sealing area between the exhaust bonnet 200 and the valve core body 120 when the exhaust bonnet 200 is supported by the valve core body 120 is different from the sealing area between the exhaust bonnet 200 and the adjusting head 130 when the exhaust bonnet 200 is supported by the adjusting head 130, namely the sealing area formed by the exhaust bonnet (200) supported on the valve core body (120) is different from the sealing area formed by the exhaust bonnet (200) supported on the adjusting head (130).

According to the exhaust valve core 100 provided by the embodiment of the invention, the exhaust pressure can be favorably regulated, so that different requirements of different users and different food materials on cooking pressure can be met, and the exhaust valve core is low in cost and high in reliability.

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 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 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 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 (14)

1. An exhaust valve, comprising:

the exhaust valve core comprises a valve core body and an adjusting head which can move relative to the valve core body;

the exhaust valve cap is arranged on the exhaust valve core and used for opening and closing the exhaust valve core;

a driving member to move the adjustment head by driving the adjustment head to support the exhaust bonnet on one of the adjustment head and the valve cartridge body;

wherein the exhaust bonnet is supported on the poppet body to form a sealing area that is different from a sealing area formed by the exhaust bonnet supported on the adjustment head;

the adjusting head is sleeved on the periphery of the valve core body; the outer peripheral surface of the valve core body is provided with an annular limiting table used for supporting the adjusting head.

2. The exhaust valve according to claim 1 wherein the adjustment head is at a lowest position when the adjustment head is supported by the stop block, an upper end of the adjustment head at the lowest position is not higher than an upper end of the valve element body, and the upper end of the adjustment head is higher than the upper end of the valve element body when the driving member drives the adjustment head to move to the highest position.

3. The discharge valve according to claim 1, wherein an inner diameter of the regulating head is greater than or equal to an outer diameter of the valve cartridge body, and an inner diameter of an upper end of the regulating head is greater than an inner diameter of an upper end of the valve cartridge body.

4. The exhaust valve according to claim 1, wherein a seal ring is provided between an inner peripheral surface of said regulator head and an outer peripheral surface of said valve body.

5. The exhaust valve according to claim 4, wherein the outer circumferential surface of the valve element body is provided with an annular groove extending along the circumferential direction of the valve element body, and the sealing ring is sleeved on the valve element body and assembled in the annular groove.

6. The exhaust valve according to any one of claims 1 to 5, wherein the adjusting head is provided with a tooth groove, the driving member is a motor, a gear meshed with the tooth groove is connected to a motor shaft of the motor, and the motor drives the adjusting head to move relative to the valve core body through the matching of the gear and the tooth groove.

7. The discharge valve according to claim 6, wherein said splines are disposed on an outer peripheral surface of said adjustment head at a lower end of said adjustment head.

8. The exhaust valve according to any one of claims 1-5 wherein said exhaust valve cap comprises: the exhaust valve core extends into the valve shell; a valve cone mounted to the valve housing for opening and closing the exhaust valve spool; wherein, when the exhaust valve cap is supported by the case body the valve cone stretches into the case body, when the exhaust valve cap is supported by the regulation head the valve cone stretches into the regulation head.

9. The exhaust valve according to any one of claims 1 to 5 wherein a snap spring is provided in the exhaust valve cap, the exhaust valve spool passes through the snap spring and the adjustment head has a disengagement prevention boss located above the snap spring, the disengagement prevention boss and at least a portion of an orthographic projection of the snap spring in a horizontal plane overlap.

10. The exhaust valve according to claim 1, wherein the exhaust valve spool includes a plurality of the adjustment heads, the adjustment heads are sequentially sleeved on the valve spool body from inside to outside along a radial direction of the valve spool body, and the driving member moves by driving the adjustment heads to support the exhaust valve spool on one of the adjustment heads and the valve spool body; wherein a sealing area formed by the exhaust bonnet supported on the valve core body and a sealing area formed by the exhaust bonnet supported on each of the adjustment heads are different from each other.

11. The exhaust valve according to claim 10 wherein said drive member is one and drives a plurality of said regulator heads to move individually; or the driving parts are multiple and drive the multiple adjusting heads to move in a one-to-one correspondence manner.

12. A lid assembly, comprising a venting valve according to any one of claims 1-11.

13. A cooking appliance comprising the lid assembly of claim 12.

14. An exhaust valve cartridge, comprising:

a valve core body;

an adjustment head movable relative to the valve cartridge body to cause an exhaust valve cap to be supported on one of the adjustment head and the valve cartridge body by moving the adjustment head;

wherein the exhaust bonnet is supported on the poppet body to form a sealing area that is different from a sealing area formed by the exhaust bonnet supported on the adjustment head;

the adjusting head is sleeved on the periphery of the valve core body.

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