CN111306318A

CN111306318A - Valve core, plug valve and gas appliance

Info

Publication number: CN111306318A
Application number: CN202010241307.6A
Authority: CN
Inventors: 吴俊�; 戚正胜; 张艺缤; 孙明雪
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-06-19

Abstract

The invention discloses a valve core, a plug valve and a gas appliance. The valve core is used for the plug valve and is in a cylindrical shape, the valve core comprises a bottom surface and a side surface, an air inlet channel and a first air outlet channel are formed in the valve core, the air inlet channel extends into the valve core from the bottom surface, the first air outlet channel is formed by sinking the side surface into the valve core, the first air outlet channel is communicated with the air inlet channel, and the first air outlet channel spirally extends along the circumferential direction of the valve core. In the valve core, the plug valve and the gas appliance, the first gas outlet channel spirally extends along the circumferential direction of the valve core, so that the communication area of the first gas outlet channel and the gas outlet of the plug valve is gradually changed in the rotating process of the valve core, the gas flow of the plug valve can be smoothly changed, the firepower can be linearly adjusted, and the requirements of users are met.

Description

Valve core, plug valve and gas appliance

Technical Field

The invention relates to the technical field of gas appliances, in particular to a valve core, a plug valve and a gas appliance.

Background

In a household combustion appliance, a plug valve is generally adopted to control the flow of gas, so that the aims of controlling manual regulation, controlling on-off of the gas and regulating the size of the gas are fulfilled. However, in the process of adjusting the size of the gas through the plug valve, smooth adjustment of the gas is difficult, and the cooking requirement of a user cannot be met.

Disclosure of Invention

The invention provides a valve core, a plug valve and a gas appliance.

The valve core is used for the plug valve, the valve core is cylindrical, the valve core comprises a bottom surface and a side surface, an air inlet channel and a first air outlet channel are formed in the valve core, the air inlet channel extends into the valve core from the bottom surface, the first air outlet channel is formed by sinking the side surface into the valve core, the first air outlet channel is communicated with the air inlet channel, and the first air outlet channel spirally extends along the circumferential direction of the valve core.

In the valve core of the embodiment of the invention, the first gas outlet channel spirally extends along the circumferential direction of the valve core, so that the communication area of the first gas outlet channel and a gas outlet of the plug valve is gradually changed in the rotation process of the valve core, the gas flow of the plug valve can be smoothly changed, the firepower can be linearly adjusted, and the requirements of users are met.

In some embodiments, the first outlet passage includes a first groove formed at the side surface and a first through hole communicating the inlet passage and the first groove, and the first groove extends spirally in a circumferential direction of the valve body.

In some embodiments, the first groove includes a first end and a second end opposite the first end along a length of the first groove, and the first through-hole is located between the first end and the second end.

In certain embodiments, a length between the first end and the first through hole is greater than a length between the second end and the first through hole.

In certain embodiments, the first groove extends helically toward the bottom surface in a direction from the first end toward the second end.

In some embodiments, the valve core is further formed with a second air outlet channel, the second air outlet channel is formed by being recessed into the valve core from the side surface, the second air outlet channel extends along the circumferential direction of the valve core, and the second air outlet channel and the first air outlet channel are arranged at intervals along the axial direction of the valve core.

In some embodiments, the second outlet passage includes a second groove formed in the side surface and a second through hole communicating the inlet passage and the second groove, and the second groove extends in a circumferential direction of the valve body.

In certain embodiments, the second through-hole is located at an end of the second groove.

In some embodiments, the valve core is further formed with a third through hole spaced apart from the second air outlet channel, the third through hole and the second through hole are located on the same circumference, and the diameter of the third through hole is smaller than that of the second through hole.

The plug valve comprises a valve body and the valve core of any one of the above embodiments, wherein the valve core is arranged in the valve body.

The gas appliance of the embodiment of the invention comprises a burner and the plug valve of the above embodiment, wherein the plug valve is connected with the burner.

Additional aspects and advantages of embodiments 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 embodiments of the invention.

Drawings

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

FIG. 1 is a schematic plan view of a gas appliance of an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a plug valve according to an embodiment of the present invention;

FIG. 3 is a schematic plan view of a plug valve according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the plug valve of FIG. 3 taken along line IV-IV;

FIG. 5 is a schematic perspective view of a valve cartridge according to an embodiment of the present invention;

FIG. 6 is another perspective view of the valve cartridge of the embodiment of the present invention;

FIG. 7 is a schematic illustration of the operation of a plug valve in accordance with an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a valve cartridge of an embodiment of the present invention;

FIG. 9 is another perspective view of the valve cartridge of the embodiment of the present invention;

FIG. 10 is another perspective view of the valve cartridge of the embodiment of the present invention.

Description of the main element symbols:

the gas stove comprises a plug valve 10, a gas appliance 12, a burner 14, a valve body 16, a valve core 18, a valve rod 20, a bottom surface 22, a side surface 24, an air inlet channel 26, a first air outlet channel 28, a containing hole 30, a first gas outlet 32, a first groove 34, a first through hole 36, a first end 38, a second end 40, a second air outlet channel 42, a second groove 44, a second through hole 46 and a third through hole 48.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining 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 "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 and 2, the present invention provides a plug valve 10, and the plug valve 10 can be used in a gas appliance 12, or the gas appliance 12 includes the plug valve 10. The gas appliance 12 includes, but is not limited to, gas cookers, gas water heaters, and other appliances requiring gas. The gas appliance 12 further comprises a burner 14, and the burner 14 is connected with the plug valve 10. The gas appliance 12 can control the fire power of the burner 14 according to the plug valve 10 so as to meet different combustion requirements. For example, when the gas appliance 12 is a gas range, the heating power of the burner 14 can be controlled by the plug valve 10 to meet the cooking requirements of different food materials. For another example, when the gas appliance 12 is a gas water heater, the water outlet temperature of the gas water heater can be adjusted by controlling the fire power of the burner 14 through the plug valve 10.

Additionally, where the gas appliance 12 is a gas range, the burner 14 may form a single ring flame or a multiple ring flame, for example, combustion of gas at the burner 14 may form an inner ring flame and an outer ring flame.

Referring to fig. 3 and 4, the plug valve 10 of the present embodiment includes a valve body 16 and a valve element 18, the valve element 18 being disposed in the valve body 16. Specifically, the valve body 16 is a body construction of the plug valve 10, and other components of the plug valve 10 may be mounted on the valve body 16 so that the plug valve 10 may serve different functions.

For example, the plug valve 10 may also include a stem 20, or the like, wherein the stem 20 extends into the valve body 16 and is connected to the valve core 16. The user manually rotates the valve stem 20 to rotate the valve core 18 and thereby control the flow of gas from the plug valve 10. The valve body 16 may be formed by casting or the like, and in order to meet the installation requirements of different components, the valve body 16 is generally an irregular component.

The valve core 18 is one of the main parts of the plug valve 10, and the plug valve 10 can regulate the flow rate of the fuel gas through the valve core 18. Referring to fig. 5 and 6, in the present embodiment, the valve element 18 includes a bottom surface 22 and a side surface 24, and the valve element 18 is formed with an air inlet channel 26 and a first air outlet channel 28. An intake passage 26 extends from the bottom surface 22 into the valve spool 18. The first outlet passage 28 is formed by recessing from the side surface 24 into the valve element 18. The first outlet passage 28 communicates with the inlet passage 26. The first outlet passage 28 extends spirally along the circumferential direction of the spool 18.

In the valve core 18 of the embodiment of the present invention, the first air outlet channel 28 extends spirally along the circumferential direction of the valve core 18, so that the communication area between the first air outlet channel 28 and the gas outlet of the plug valve 10 gradually changes in the rotation process of the valve core 18, and the gas flow of the plug valve 10 can be smoothly changed, so that the fire power can be linearly adjusted, and the user requirements can be met.

Specifically, the valve body 16 is formed with a housing hole 30 and a first gas outlet 32 (shown in fig. 7) formed in a side wall of the housing hole 30, the first gas outlet 32 being for allowing gas to flow out of the valve body 16. The first gas outlet 32 may be circular, oval, etc. When the first gas outlet channel 28 is communicated with the first gas outlet 32, the gas in the gas inlet channel 26 can flow into the first gas outlet 32 through the first gas outlet channel 28, so that the gas can flow out of the valve body 16.

During the rotation of the valve core 18, as the first gas outlet channel 28 extends spirally, the linear change of the communication area between the first gas outlet channel 28 and the first gas outlet 32 is more obvious, so that the effect of controlling the flame size of the plug valve 10 is more obvious, and a user can obviously see the flame change of the burner 14.

In one example, as shown in FIG. 7, FIG. 7 shows a schematic process diagram of the valve core 18 as a base reference, i.e., the valve core 18 and the first outlet gas channel 28 are stationary, while the first gas outlet 32 moves. During the counterclockwise rotation of the valve core 18, the communication area (hatched portion) between the first gas outlet 32 and the first gas outlet channel 28 is gradually reduced, so that the outflow amount of the gas can be controlled to be gradually reduced. Because the first air outlet channel 28 is obliquely arranged, even if the valve core 18 rotates at a small angle, the communication area between the first gas outlet 32 and the first air outlet channel 28 can be obviously changed, and the effect of adjusting the gas flow is more obvious.

Note that, in the present embodiment, the counterclockwise direction refers to a clockwise direction when viewed from the top of the valve element 18 to the bottom of the valve element 18.

Further, the spool 18 may be made of a metal material, for example, the spool 18 may be formed by copper manufacturing. The valve element 18 may be a substantially cylindrical body such as a circular truncated cone. The bottom surface 22 of the valve element 18 is an end surface of the valve element 18 located at the bottom of the valve element 18 in a normal use state. The side surfaces 24 of the valve spool 18 are contoured surfaces of the valve spool 18 that form the overall shape of the valve spool 18.

Referring to fig. 8, the central axis of the intake passage 26 may be linear or curved. In the present embodiment, the central axis of the intake passage 26 is linear, and the intake passage 26 has an equal cross-sectional area. The depth direction of the intake passage 26 extends in the axial direction of the spool 18. Of course, in other embodiments, the intake passage 26 may be of a variable cross-sectional shape.

The first outlet passage 28 is recessed from the side surface 24 into the valve element 18, and therefore, it can be understood that the depth direction of the first outlet passage 28 is the radial direction of the valve element 18. First outlet channel 28 may be formed by a machining process.

Note that the first outlet passage 28 extends spirally along the circumferential extension of the valve element 18, meaning that the contour of the first outlet passage 28 on the side surface 24 extends spirally along the circumferential extension of the valve element 18. At this time, the projection of the first outlet passage 28 on an assumed plane passing through the center axis of the spool 18 is inclined.

Referring again to fig. 6, in some embodiments, the first outlet channel 28 includes a first groove 34 and a first through hole 36, and the first groove 34 is formed on the side surface 24. The first through hole 36 communicates the intake passage 26 and the first groove 34. The first groove 34 extends spirally along the circumferential direction of the spool 18.

In this way, when the first groove 34 is communicated with the first gas outlet 32, the gas in the air inlet channel 26 can flow into the first gas outlet 32 through the first through hole 36 and the first groove 34, and the purpose of gas control is achieved. In addition, the first groove 34 is blocked from the intake passage 26 in the radial direction of the valve spool 18, so that the gas can flow into the first groove 34 only through the first through hole 36. Because the path length of different positions of first recess 34 is different with first through-hole 36, consequently, the resistance of the flow of gas is also different, when can making different positions of first recess 34 and first gas export 32 communicate like this, realizes the flow control's of gas effect through the resistance, further improves the linear regulation's of gas effect.

In the embodiment of the present application, when the first through hole 36 is aligned with the first gas outlet 32, the communication area between the first gas outlet channel 28 and the first gas outlet 32 is the largest, and the gas directly enters the first gas outlet 32 after passing through the first through hole 36. In the rotation process of the valve core 18, the first groove 34 is gradually communicated with the first gas outlet 32, at this time, because the first groove 34 is spiral, the communication area between the first gas outlet channel 28 and the first gas outlet 32 becomes smaller, and the path from the gas inlet channel 26 to the first gas outlet 32 is lengthened, so that the resistance becomes larger, the reduction range of the gas flow is more obvious, and the linear flame adjustment effect of the burner 14 corresponding to the first gas outlet channel 28 is further improved. It is understood that the first through hole 36 communicates with the intake through hole in the radial direction of the spool 18.

Referring to fig. 6 and 9, in some embodiments, the first groove 34 includes a first end 38 and a second end 40 opposite the first end 38 along a length of the first groove 34, and the first through hole 36 is located between the first end 38 and the second end 40.

As discussed above, when the first through hole 36 is aligned with the first gas outlet 32, the communication area of the first gas outlet channel 28 with the first gas outlet 32 is the largest, and the gas flow through the first gas outlet channel 28 is the largest. The farther the position of the first groove 34 is from the first through hole 36, the smaller the flow rate of the gas. Generally, the burner 14 is fired when the first through hole 36 is aligned with the first gas outlet 32 such that the flame of the burner 14 is maximized after firing.

In the present embodiment, the first through hole 36 is located between the first end 38 and the second end 40, so that during the ignition of the burner 14, the communication area between the first gas outlet channel 28 and the first gas outlet 32 gradually increases along with the rotation of the valve core 18, and the gas flow rate can be linearly changed from just opening the valve to the state where the gas flow rate is maximum in the plug valve 10, thereby preventing the danger caused by the explosion of the burner 14.

Further, the length between the first end 38 and the first through hole 36 is greater than the length between the second end 40 and the first through hole 36. In the present embodiment, during ignition of the burner 14, the valve element 18 rotates counterclockwise, the second end portion 40 first communicates with the first gas outlet 32, and the first through hole 36 and the second end portion 40 sequentially communicate with the first gas outlet 32 as the valve element 18 rotates. The longer length between the first end 38 and the first through hole 36 allows the gas flow rate flowing out of the first gas outlet 32 to be adjusted in a wider range with the rotation of the valve core 18 after the ignition of the burner 14, thereby facilitating the linear adjustment of the flame of the burner 14.

Further, the first groove 34 extends helically toward the bottom surface 22 in a direction from the first end 38 toward the second end 40. Conversely, the first groove 34 extends helically upward in a direction from the second end 40 toward the first end 38. In this way, the first groove 34 can fully utilize the upper position of the valve core 18, and the formation of the first groove 34 is facilitated.

Referring to fig. 6 and 9 again, in some embodiments, the valve element 18 further forms a second air outlet channel 42, the second air outlet channel 42 is formed by recessing the side surface 24 into the valve element 18, the second air outlet channel 42 extends along the circumferential direction of the valve element 18, and the second air outlet channel 42 and the first air outlet channel 28 are disposed at intervals along the axial direction of the valve element 18.

In this manner, the second outlet passage 42 allows the plug valve 10 to control another gas path, so that the burner 14 can realize two flames. In one example, first outlet channel 28 corresponds to an outer ring flame of burner 14 and second outlet channel 42 corresponds to an inner ring flame of burner 14. Alternatively, plug valve 10 may control the size of the outer ring flame of burner 14 via first outlet passage 28 and the size of the inner ring flame of burner 14 via second outlet passage 42.

It will be appreciated that the valve body 16 is formed with a second gas outlet (not shown) in communication with the receiving bore 30, and that when the second gas outlet is in communication with the second gas outlet passage 42, gas can flow from the gas inlet passage 26 through the second gas outlet passage 42 and into the second gas outlet for flow to the burner 14. Similar to the first outlet passage 28, the depth direction of the second outlet passage 42 is the radial direction of the spool 18.

In addition, in the present embodiment, the second outlet passages 42 extend in the same circumferential direction. Of course, the second outlet passage 42 may also extend spirally along the circumferential direction of the valve element 18.

In the present embodiment, the first outlet channel 28 and the second outlet channel 42 are respectively arranged up and down along the axial direction of the valve core 18, or the first outlet channel 28 is located above the second outlet channel 42.

In some embodiments, first outlet passage 28 and second outlet passage 42 partially overlap in the axial direction of spool 18. In this manner, the arrangement of the first outlet passage 28 and the second outlet passage 42 on the spool 18 is relatively compact.

As shown in fig. 6, in some embodiments, second outlet channel 42 includes a second groove 44 and a second through-hole 46, second groove 44 being formed in side surface 24. The second through hole 46 communicates the intake passage 26 and the second groove 44. The second groove 44 extends in the circumferential direction of the spool 18.

In this way, when the second groove 44 is communicated with the second gas outlet, the gas in the air inlet channel 26 can flow into the second gas outlet through the second through hole 46 and the second groove 44, and the purpose of gas control is achieved. In addition, the second groove 44 is blocked from the intake passage 26 in the radial direction of the valve spool 18, so that the gas can flow into the second groove 44 only through the second through hole 46. Because the path lengths of different parts of the second groove 44 and the second through hole 46 are different, the flowing resistance of the fuel gas is also different, so that when the different parts of the second groove 44 are communicated with the second fuel gas outlet, the flow regulation effect of the fuel gas is realized through the resistance, and the linear regulation effect of the fuel gas is further improved.

In the embodiment of the present application, similar to the first gas outlet channel 28, when the second through hole 46 is aligned with the second gas outlet, the communication area between the second gas outlet channel 42 and the second gas outlet is the largest, and the gas directly enters the second gas outlet after passing through the second through hole 46. During the rotation of the valve core 18, as the path from the gas inlet channel 26 to the second gas outlet is lengthened, the resistance is increased, so that the reduction range of the flow rate of the gas is more obvious, and the linear flame adjustment effect of the burner 14 corresponding to the second gas outlet channel 42 is further improved. It is understood that the second through hole 46 communicates with the intake through hole in the radial direction of the spool 18.

In some embodiments, the second through-hole 46 is located at an end of the second groove 44. As discussed above, when the second through hole 46 is aligned with the second gas outlet, the communication area of the second gas outlet channel 42 and the second gas outlet is the largest, and the gas flow passing through the second gas outlet channel 42 is the largest. The farther the location of the second groove 44 is from the second through hole 46, the smaller the flow rate of the combustion gas. Generally, the burner 14 ignites when the second through-hole 46 is aligned with the second gas outlet such that the flame of the burner 14 is maximized after ignition. Therefore, the second through hole 46 is located at the end of the second groove 44, so that after ignition of the burner 14, as the valve core 18 rotates, the communication area of the second air outlet channel 42 and the second fuel outlet gradually decreases as the valve core 18 rotates, and a flame regulation diminishing effect is achieved.

Further, in the circumferential direction of the spool 18, the second through hole 46 is located at the end of the second groove 44 near the first outlet passage 28. Thus, as discussed above, when first outlet passage 28 corresponds to an outer ring flame and second outlet passage 42 corresponds to an inner ring flame, the inner and outer ring flames reach a maximum after ignition of burner 14, and gradually decrease as valve element 18 continues to rotate in the direction of rotation of the ignition process.

Referring to fig. 10, in some embodiments, the valve core 18 further forms a third through hole 48 spaced apart from the second air outlet channel 42, the third through hole 48 and the second through hole 46 are located on the same circumference, and a diameter of the third through hole 48 is smaller than a diameter of the second through hole 46.

As such, the third through-hole 48 stably minimizes the flame of the burner 14. Specifically, as discussed above, when first outlet channel 28 corresponds to an outer ring flame and second outlet channel 42 corresponds to an inner ring flame, the inner and outer ring flames reach a maximum after ignition of burner 14, gradually decrease as spool 18 continues to rotate in the rotational direction of the ignition process, and the outer ring flame extinguishes and the inner ring flame minimizes when the second gas outlet is aligned with third through-hole 48.

It should be noted that the angle through which the valve core 18 can rotate from the time the plug valve 10 is just opened to the time it vents through the third through hole 48 is 225 °. Or the valve core 18 of the embodiment of the present application can be adjusted between 0 ° and 225 °. When the valve core 18 rotates from 0 degrees to 90 degrees, the burner 14 can be ignited, at the moment, the firepower of the inner ring flame and the outer ring flame of the burner 14 is the largest, in the process that the valve core 18 rotates from 90 degrees to 225 degrees, the inner ring flame and the outer ring flame are firstly reduced, then the outer ring flame is extinguished, and the inner ring flame reaches the minimum state.

In the description of the specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention, which is defined by the claims and their equivalents.

Claims

1. The utility model provides a case, is used for plug valve, its characterized in that, the case is the cylindricality body, the case includes bottom surface and side, the case is formed with inlet channel and first air outlet channel, inlet channel certainly the bottom surface is to extend in the case, first air outlet channel certainly the side to in the case sunken formation, first air outlet channel intercommunication inlet channel, first air outlet channel is followed the circumference spiral of case extends.

2. The valve cartridge according to claim 1, wherein the first outlet passage includes a first groove formed at the side surface and a first through hole communicating the inlet passage and the first groove, the first groove extending spirally in a circumferential direction of the valve cartridge.

3. The valve cartridge of claim 2, wherein the first groove includes a first end and a second end opposite the first end along a length of the first groove, the first through-hole being located between the first end and the second end.

4. The valve cartridge of claim 3, wherein a length between the first end and the first through-hole is greater than a length between the second end and the first through-hole.

5. The valve cartridge of claim 4, wherein the first groove extends helically toward the bottom surface in a direction from the first end toward the second end.

6. The valve element according to claim 1, wherein a second air outlet channel is formed in the valve element, the second air outlet channel is formed by being recessed from the side surface into the valve element, the second air outlet channel extends along the circumferential direction of the valve element, and the second air outlet channel and the first air outlet channel are arranged at intervals along the axial direction of the valve element.

7. The valve cartridge according to claim 6, wherein the second outlet passage includes a second groove formed at the side surface and a second through hole communicating the inlet passage and the second groove, the second groove extending in a circumferential direction of the valve cartridge.

8. The valve cartridge of claim 7, wherein the second through-hole is located at an end of the second groove.

9. The valve element according to claim 7, wherein a third through hole is formed in the valve element and spaced from the second air outlet channel, the third through hole and the second through hole are located on the same circumference, and the diameter of the third through hole is smaller than that of the second through hole.

10. A plug valve, comprising:

a valve body; and

the valve cartridge of any one of claims 1-9, disposed in the valve body.

11. A gas appliance, comprising:

a burner; and

the plug valve of claim 10, said plug valve being connected to said burner.