Stopcock and hob

Abstract

The application provides a cock valve and a stove. The cock valve comprises a valve core, a valve body and a top bead assembly. The valve core defines a valve core cavity and is provided with a plurality of air inlet holes which are distributed at intervals from each other within an angle on a first circumference and are in fluid communication with the valve core cavity. The valve core is further provided with a plurality of positioning grooves which are arranged at intervals on a second circumference. The valve body is provided with a valve core hole and an air inlet gas path in fluid communication with the valve core hole. The top bead assembly is configured to abut into the corresponding positioning groove when the valve core rotates to a position in which one of the air inlet holes is aligned with the air inlet gas path in the valve core hole. The plurality of air inlet holes are arranged in order of gear size. The valve core is further provided with a transition hole which is arranged on a side of the air inlet hole corresponding to the largest gear and which is circumferentially away from the other air inlet holes. The valve core is further provided with a transition groove corresponding to the transition hole. The cock valve can give the user a certain gear feel and avoid the problem of needing to re-ignite when the flame is extinguished.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a stopcock valve and a stove. Background Technology

[0002] As a core component of gas stoves, the rotary valve is crucial for controlling gas flow and continuously adjusting flame intensity. The matching relationship between the valve core's rotation angle and the gas flow cross-sectional area directly determines the stove's flame adjustment performance and user experience. Currently, conventional rotary valves typically set the maximum flame intensity to 90° counter-clockwise rotation of the valve core, with the knob, valve stem, and valve core moving synchronously. The standard operating logic is: rotating the knob counter-clockwise from the 90° position decreases the flame intensity by rotating the valve core, while rotating it clockwise increases the flame intensity. When the valve core rotation angle is between α (an angle less than 90°) and 90° counter-clockwise, the valve core's gas distribution channel and the valve body's gas channel are connected, enabling flame adjustment. When the counter-clockwise rotation angle is less than α, the valve core's gas distribution channel and the valve body's gas channel are separated, cutting off the gas flow and extinguishing the stove. In practical use, some users prefer to adjust the cooking flame intensity within the aforementioned α to 90° range.

[0003] Existing rotary valves have a narrow effective angle range for adjusting heat within the interval between α and 90°, resulting in a large gradient in heat intensity with changing angle. This makes it difficult to achieve precise adjustments at the lowest heat setting, and unsuitable for cooking scenarios requiring high precision in heat control, such as slow cooking and braising. Furthermore, when users continuously rotate the knob towards the lowest heat setting to fine-tune the heat, they are very likely to exceed the critical angle position α, causing the gas passage to suddenly shut off and the stove to shut off directly. Users then need to perform an ignition operation again, interrupting the cooking process, resulting in poor operational continuity and severely impacting the user experience. Summary of the Invention

[0004] The purpose of this invention is to solve at least one of the above-mentioned problems and / or other problems existing in the prior art.

[0005] To achieve the objectives of this invention, the following technical solution is adopted: According to one aspect of the present invention, a plug valve is provided, the plug valve comprising a valve core, a valve body and a top ball assembly. The valve core defines a valve core cavity and is provided with a plurality of air inlets extending radially. The plurality of air inlets are spaced apart from each other within an angle on a first circumference and are in fluid communication with the valve core cavity. The valve core is also provided with a plurality of positioning grooves spaced apart on a second circumference, and the plurality of positioning grooves correspond one-to-one with the plurality of air inlets. The valve body is provided with a valve core hole for inserting the valve core and is provided with an air intake passage in fluid communication with the valve core hole. The top ball assembly is mounted on the valve body and is configured such that when the valve core rotates within the valve core hole until one of the air inlets aligns with the air intake passage, the top ball assembly abuts against the corresponding positioning groove. The plurality of air inlets are arranged sequentially according to the gear size. The valve core is also provided with a transition hole, which is located on the side of the air inlet corresponding to the largest gear that is circumferentially away from the other air inlets. The valve core is also provided with a transition groove corresponding to the transition hole.

[0006] According to one embodiment of the present invention, the angle between the central axis of the transition hole and the central axis of the air intake hole at the maximum gear position is less than 90°, and correspondingly, the angle between the transition groove and the positioning groove corresponding to the air intake hole at the maximum gear position is less than 90°.

[0007] According to one embodiment of the present invention, the valve core is further provided with a groove on the second circumference. The groove is disposed on the side of the transition groove opposite to the plurality of positioning grooves and is spaced 90° apart from the positioning groove corresponding to the maximum position, so as to be configured such that when the plug valve is closed, the top ball assembly abuts against the groove.

[0008] According to one embodiment of the present invention, the five air inlets include a first air inlet, a second air inlet, a third air inlet, and a fourth air inlet that are configured as blind holes, and a fifth air inlet that is configured as a through hole. The first air inlet is in fluid communication with the second air inlet via a first connecting hole, the second air inlet is in fluid communication with the third air inlet via a second connecting hole, the third air inlet is in fluid communication with the fourth air inlet via a third connecting hole, the fourth air inlet is in fluid communication with the fifth air inlet via a fourth connecting hole, and the transition hole is configured as a blind hole and is in fluid communication with the fifth air inlet via a fifth connecting hole.

[0009] According to one embodiment of the present invention, the first to fourth air inlets have the same diameter, and the diameters of the fifth connecting hole, the first connecting hole, the second connecting hole, the third connecting hole and the fourth connecting hole gradually increase in sequence.

[0010] According to one embodiment of the present invention, the valve core includes a valve core body and a collar. The valve core body includes a first section defining the valve core cavity and a second section extending axially from the first section. The five air inlets and the transition holes are arranged circumferentially spaced on the first section. The collar is sleeved on the second section and configured to rotate with the valve core body. The five positioning grooves and the transition grooves are arranged circumferentially spaced on the outer periphery of the collar.

[0011] According to one embodiment of the present invention, at least one peripheral tangent portion is provided on the outer periphery of the second section of the valve core body, and at least one tangent mating portion is provided on the inner periphery of the collar, wherein the tangent mating portion abuts against the peripheral tangent portion in a one-to-one correspondence.

[0012] According to one embodiment of the present invention, the valve body is provided with an outer ring air passage, and the valve core is provided with an air outlet and an air outlet groove extending along the third circumferential direction on the outer periphery, so that during the process of switching fluid communication between a portion of the air inlet and the air inlet passage, the air outlet can maintain fluid communication with the outer ring air passage through the air outlet groove.

[0013] According to one embodiment of the present invention, the bottom of the valve core and the bottom of the valve core hole have a gap, and the valve body is provided with a central air passage, the inlet end of the central air passage extending to the inner peripheral wall of the valve core hole corresponding to the gap.

[0014] According to another aspect of the invention, a cooktop is provided. The cooktop includes a stopcock valve as described above.

[0015] One embodiment of the present invention has the following advantages or beneficial effects: The valve core of the rotary valve for stoves of the present invention has a transition hole on the side of the air inlet corresponding to the maximum setting, which is counterclockwise away from other air inlets. Similarly, a transition groove is provided on the side of the positioning groove corresponding to the maximum setting, which is counterclockwise away from other positioning grooves. The transition groove corresponds to the transition hole, allowing the top ball assembly to abut against the transition groove when the valve core rotates within the valve core hole of the valve body to the transition setting (i.e., the transition hole aligns with the air inlet path). This provides the user with a tactile feel for the different settings, allowing them to perceive that adjusting the flame clockwise from the maximum setting to the transition setting results in the lowest flame, and that the flame is extinguished once this position is crossed, thus avoiding the need for re-ignition after flameout. Attached Figure Description

[0016] The above and other features and advantages of the present invention will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0017] Figure 1A perspective view of a plug valve according to an embodiment of the present invention is shown.

[0018] Figure 2 Show Figure 1 The diagram shows a cross-sectional view of the plug valve along the first circumference of the plane.

[0019] Figure 3 Show Figure 1 The diagram shows a cross-sectional view of the plug valve along the plane of the second circumference.

[0020] Figure 4 Show Figure 1 The diagram shows a cross-sectional view of the plug valve along the plane defined by the central axis of the valve core and the central air passage.

[0021] Figure 5 Show Figure 1 The diagram shows a cross-sectional view of the plug valve along the plane defined by the central axis of the valve core and the outer annular air passage.

[0022] Figure 6 Show Figure 1 An exploded view of the valve core of the plug valve shown.

[0023] The reference numerals in the attached figures are explained as follows: 1. Valve core; 11. Valve core cavity; 121. First air inlet; 122. Second air inlet; 123. Third air inlet; 124. Fourth air inlet; 125. Fifth air inlet; 126. Transition hole; 131. First positioning groove; 132. Second positioning groove; 133. Third positioning groove; 134. Fourth positioning groove; 135. Fifth positioning groove; 136. Transition groove; 137. Groove; 141. First connecting hole; 142. Second connecting hole; 143. Third connecting hole; 144. Fourth connecting hole; 145. Fifth connecting hole; 15. Valve core body; 151. First section; 152. Second section; 153. Outer peripheral tangent section; 16. Collar; 161. Tangent mating part; 171. Air outlet; 172. Air outlet groove; 2. Valve body; 21. Valve core hole; 22. Air inlet passage; 23. Top ball mounting part; 24. Outer ring air passage; 25. Central air passage; 3. Top ball assembly; D. Gap; Detailed Implementation

[0024] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0025] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that other elements / components / etc. may exist in addition to the listed elements / components / etc.

[0026] Figures 1 to 6 A stopcock valve for a stove, according to one embodiment of the present invention, is shown. Figures 1 to 3 As shown, the plug valve according to this embodiment may include a valve core 1, a valve body 2, and a top ball assembly 3.

[0027] refer to Figures 1 to 5 As shown, the valve core 1 defines a valve core cavity 11 with an axial port at one of its axial ends. The valve core 1 has a plurality of air inlets on the peripheral wall of the valve core cavity 11, which are directly or indirectly in fluid communication with the valve core cavity 11. These air inlets are arranged at equal intervals within an angle (e.g., 90°, 150°, etc.) on a first circumference and are arranged sequentially according to the gear position. For example, in Figure 2 The diagram shows that the valve core 1 has five air inlets, namely, a first air inlet 121, a second air inlet 122, a third air inlet 123, a fourth air inlet 124, and a fifth air inlet 125 arranged in a counterclockwise direction (the following will use five air inlets as an example for specific explanation). The valve core 1 also has a transition hole 126 on its first circumference. The transition hole 126 is located on the side of the maximum gear air inlet that is circumferentially away from the other air inlets. For example, in this embodiment, the air volume entering the valve core cavity 11 through the fifth air inlet 125 is the largest, and can be referred to as the air inlet corresponding to the maximum gear. The transition hole 126 is located on the side of the fifth air inlet 125 that is counterclockwise away from the other four air inlets (i.e.,...). Figure 2 (The fifth air inlet 125 shown is on the counterclockwise side). Thus, when the valve is set to maximum power, rotating the valve core 1 clockwise so that the transition hole 126 is in the working position where it is in fluid communication with the air intake passage 22 (described in detail below) can adjust the power to low.

[0028] Optionally, the first to fourth air inlets are configured as blind holes, and the fifth air inlet is configured as a through hole. The first air inlet 121 and the second air inlet 122 are fluidly connected through the first connecting hole 141, the second air inlet 122 and the third air inlet 123 are fluidly connected through the second connecting hole 142, the third air inlet 123 and the fourth air inlet 124 are fluidly connected through the third connecting hole 143, and the fourth air inlet 124 and the fifth air inlet 125 are fluidly connected through the fourth connecting hole 144. The transition hole 126 and the fifth air inlet 125 are fluidly connected through the fifth connecting hole 145. This ensures that the internal air passages of the five air inlets and transition holes 126 are fully connected, and the air intake of all gears shares the same pressure stabilizing chamber. Before the gas enters the valve core chamber 11, pressure equalization and flow stabilization are completed. No matter which gear is switched to, the intake air pressure and airflow velocity are uniform and consistent, ensuring from the source that the flame of each gear of the stove is regular, the combustion is complete, there is no deviation, and there is no flameout or backfire, which greatly improves the combustion stability of the stove.

[0029] In this embodiment, the orifice diameters of the first to fourth air inlets located on the outer peripheral surface of the valve core 1 can be approximately the same, such as... Figure 2 As shown, the diameters of the fifth connecting hole 145, the first connecting hole 141, the second connecting hole 142, the third connecting hole 143, and the fourth connecting hole 144 gradually increase in sequence, thereby setting the gas flow rate through each air inlet and transition hole 126 to suit different gear levels. In other embodiments, the diameters of the orifices of the first to fourth air inlets and the transition hole 126 located on the outer peripheral surface of the valve core 1 can also be controlled, and the diameters of the first to fifth connecting holes can be set to be approximately the same.

[0030] The valve core 1 is also equipped with multiple positioning grooves, which are configured to correspond one-to-one with the air inlet ports. For example, in Figure 3 The five positioning slots shown are, in a counter-clockwise direction, the first positioning slot 131, the second positioning slot 132, the third positioning slot 133, the fourth positioning slot 134, and the fifth positioning slot 135. The first positioning slot 131 corresponds to the first air inlet 121 (i.e., the minimum setting), the second positioning slot 132 corresponds to the second air inlet 122 (i.e., the second low setting), the third positioning slot 133 corresponds to the third air inlet 123 (i.e., the intermediate setting), the fourth positioning slot 134 corresponds to the fourth air inlet 124 (i.e., the second high setting), and the fifth positioning slot 135 corresponds to the fifth air inlet 125 (i.e., the maximum setting). The valve core 1 also has a transition groove 136 and a recess 137 on its second circumference. The transition groove 136 is located on the side of the fifth positioning slot 135 facing away from the other positioning slots in the Shenzhen direction, and corresponds to the transition hole 126 (i.e., the transition setting where the firepower is less than the minimum setting). The groove 137 is provided on the side of the transition groove 136 opposite to the fifth positioning groove 135 and is configured to allow the top ball assembly 3 to abut against it when the plug valve is in the closed position.

[0031] Specifically, refer to Figure 4 and Figure 6 As shown, the valve core 1 may include a valve core body 15 and a collar 16. The valve core body 15 includes a first section 151 and a second section 152, which are coaxially arranged and integrally formed as a single unit. The first section 151 is generally a hollow cone, and the second section 152 is generally a solid column with two outer circumferential tangent portions 153 that are opposite each other in the diametrical direction. Thus, when the second section 152 is integrally formed onto the first section 151, one axial end of the first section 151 can be sealed through the second section 152, and the orifice at the other axial end of the first section 151 forms the axial port of the valve core cavity 11. The five air inlets are arranged at equal intervals along a first circumference on the first section 151 and penetrate radially into the valve core cavity 11, respectively.

[0032] Combination Figure 2 and Figure 3 As shown, the first positioning groove 131, the second positioning groove 132, the third positioning groove 133, the fourth positioning groove 134, and the fifth positioning groove 135 are arranged at equal intervals on the second circumference of the collar 16. Figure 2 and Figure 3 When the valve core is located in the same position and the transition hole 126 is aligned with the air intake passage 22, the top ball assembly 3 is exactly abutting against the transition groove 136, which can give the user a certain gear feel, so that the user can feel that when the firepower is turned down in the clockwise direction from the maximum firepower, the firepower is at its minimum when adjusted to that position, and once it is passed the position, it will be turned off, thus avoiding the problem of needing to restart after the firepower is turned off.

[0033] Optionally, refer to Figure 2 As shown, the angle between the central axis of the transition hole 126 and the central axis of the fifth air intake hole 125 (i.e., the air intake hole corresponding to the maximum gear) is less than 90°. Correspondingly, the angle between the transition groove 136 and the fifth positioning groove 135 (i.e., the positioning groove corresponding to the maximum gear) is less than 90°, as shown... Figure 3 As shown.

[0034] refer to Figure 3 As shown, a groove 137 is also provided on the second circumference of the collar 16 of the valve core 1. The groove 137 is located on the side of the transition groove 136 opposite to the five positioning grooves, and is spaced 90° from the fifth positioning groove 135 (i.e., the positioning groove corresponding to the maximum position). Thus, when the plug valve is in the maximum position, that is, when the top ball assembly 3 is abutting against the fifth positioning groove 135, rotating it 90° clockwise causes the outer peripheral wall of the first section 151 of the valve core 1 to abut against the air intake passage 22, thereby closing the air intake passage 22 and closing the plug valve. In this case, the top ball assembly 3 abuts against the groove 137.

[0035] refer to Figure 3 and Figure 6 As shown, the inner peripheral wall of the collar 16 is provided with at least one tangential engagement portion 161. The tangential engagement portion 161 may include a pair of corner portions arranged at intervals from each other, which protrude radially inward from the inner peripheral wall of the collar 16 and abut against the corresponding outer peripheral tangential portion 153 on the valve core body 15. Thus, the outer peripheral tangential portion 153 and the tangential engagement portion 161 form an anti-rotation structure between the valve core body 15 and the collar 16, allowing the collar 16 to rotate synchronously with the valve core body 15.

[0036] refer to Figure 1 , Figure 4 and Figure 5 As shown, the valve body 2 is provided with a valve core hole 21, into which the first section 151 of the valve core 1 can be inserted. The valve body 2 is also provided with an air intake passage 22 that is in fluid communication with the valve core hole 21. The valve core 1 can rotate relative to the valve body 2 within the valve core hole 21, allowing one of the five air intake holes to be in fluid communication with the air intake passage 22. Gas combustion can then enter the valve core cavity 11 from the air intake passage 22 via the air intake hole, allowing the top ball assembly 3 to abut against the corresponding positioning groove. Figure 2 As shown, when the transition hole 126 is in fluid communication with the intake air passage 22, the top ball assembly 3 can abut against the transition groove 136, as shown. Figure 3 As shown. On the other hand, the outer peripheral wall of the first section 151 of the valve core 1 can also be aligned with the position of the air intake passage 22, thereby preventing the gas from entering the valve core cavity 11, at which time the top ball assembly 3 abuts against the groove 137.

[0037] A top ball mounting part 23 is also provided on the valve body 2, such as Figure 4 and Figure 5 As shown. A mounting hole is provided in the center of the top ball mounting portion 23. The top ball assembly 3 may include a fastener, a spring, and a top ball. The spring is disposed within the mounting hole, and the fastener is fixed to the top ball mounting portion 23 within the mounting hole and abuts against one end of the spring. The top ball is disposed at the other end of the spring and extends from the mounting hole, elastically abutting against the collar 16.

[0038] refer to Figure 1 , Figure 5 and Figure 6As shown, the valve body 2 is also provided with an outer annular air passage 24. The first section 151 of the valve core 1 is provided with an outlet hole 171 and an outlet groove 172. The outlet hole 171 is located on the bottom side of the plurality of air inlets away from the collar 16, and the outlet groove 172 extends from the outer periphery of the outlet hole 171 along the third circumferential direction at an angle. This allows the outlet hole 171 to maintain fluid communication with the outer annular air passage 24 via the outlet groove 172 when the valve core 1 rotates within this angle range, and the gas in the valve core cavity 11 enters the outer annular air passage 24 via the outlet hole 171 and the outlet groove 172. For example, in this embodiment, when the valve core 1 rotates between the maximum position where the fourth air inlet 124 and the air inlet passage 22 are in fluid communication and the second maximum position where the fifth air inlet 125 and the air inlet passage 22 are in fluid communication, the outer annular air passage 24 and the valve core cavity 11 always remain in communication.

[0039] refer to Figure 1 and Figure 4 As shown, a central air passage 25 is also provided on the valve body 2. A gap D exists between the bottom of the valve core 1 and the bottom of the valve core hole 21. The air inlet end of the central air passage 25 extends through to the inner peripheral wall of the valve core hole 21 and corresponds to the position of the gap D. Thus, after the fuel gas enters the valve core cavity 11, it enters the central air passage 25 through the gap D. Regardless of the valve core 1's rotation relative to the valve body 2, the central air passage 25 and the valve core hole 21 remain in fluid communication.

[0040] According to one embodiment of the present invention, a cooktop is also provided. The cooktop mainly includes the above-described stopcock valve.

[0041] As described above, in this embodiment, the valve core 1 of the plug valve has a transition hole 126 on the side of the air inlet corresponding to the maximum position that is counterclockwise away from other air inlets, and a transition groove 136 on the side of the positioning groove corresponding to the maximum position that is counterclockwise away from other positioning grooves. The transition groove 136 corresponds to the transition hole 126, so that when the valve core 1 rotates to the transition position (i.e., the transition hole is aligned with the air inlet passage 22) within the valve core hole 21 of the valve body 2, the top ball assembly 3 can abut against the transition groove 136. In this way, a certain gear feel can be given to the user, so that the user can perceive that when the firepower is reduced from the maximum position clockwise, it can be adjusted to the position where the firepower is at its minimum. Once this position is passed, the flame will be extinguished, thereby avoiding the problem of needing to restart after the flame is extinguished.

[0042] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0043] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0044] In the description of this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, the embodiments of the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention.

Claims

1. A plug valve, characterized in that, The plug valve includes: The valve core (1) defines a valve core cavity (11) and is provided with a plurality of air inlets extending radially. The plurality of air inlets are distributed at intervals within an angle on a first circumference and are in fluid communication with the valve core cavity (11). The valve core (1) is also provided with a plurality of positioning grooves arranged at intervals on a second circumference. The plurality of positioning grooves correspond one-to-one with the plurality of air inlets. A valve body (2) is provided with a valve core hole (21) for inserting the valve core (1), and an air inlet passage (22) in fluid communication with the valve core hole (21); and Top ball assembly (3), the top ball assembly (3) is mounted on the valve body (1) and is configured such that when the valve core (1) rotates in the valve core hole (21) to align one of the air inlets with the air inlet passage (22), the top ball assembly (3) abuts against the corresponding positioning groove; The plurality of air intake holes are arranged in order of gear size. The valve core (1) is also provided with a transition hole (126). The transition hole (126) is located on the side of the air intake hole corresponding to the maximum gear that is circumferentially away from the other air intake holes. The valve core (1) is also provided with a transition groove (136) corresponding to the transition hole (126).

2. The plug valve according to claim 1, characterized in that, The angle between the central axis of the transition hole (126) and the central axis of the air intake hole at the maximum gear position is less than 90°. Correspondingly, the angle between the transition groove (136) and the positioning groove corresponding to the air intake hole at the maximum gear position is less than 90°.

3. The plug valve according to claim 2, characterized in that, The valve core (1) is further provided with a groove (137) on the second circumference. The groove (137) is located on the side of the transition groove (136) away from the plurality of positioning grooves and is spaced 90° apart from the positioning groove corresponding to the maximum position, so as to be configured such that when the plug valve is closed, the top ball assembly (3) abuts against the groove (137).

4. The plug valve according to any one of claims 1 to 3, characterized in that, The five air inlets include a first air inlet (121), a second air inlet (122), a third air inlet (123), and a fourth air inlet (124) which are configured as blind holes, and a fifth air inlet (125) which is configured as a through hole. The first air inlet (121) is in fluid communication with the second air inlet (122) via a first connecting hole (141). The second air inlet (122) is in fluid communication with the third air inlet (123) via a second connecting hole (142). The third air inlet (123) is in fluid communication with the fourth air inlet (124) via a third connecting hole (143). The fourth air inlet (124) is in fluid communication with the fifth air inlet (125) via a fourth connecting hole (144). The transition hole (126) is configured as a blind hole and is in fluid communication with the fifth air inlet (125) via the fifth connecting hole (145).

5. The plug valve according to claim 4, characterized in that, The first to fourth air inlets have the same diameter, and the diameters of the fifth connecting hole (145), the first connecting hole (141), the second connecting hole (142), the third connecting hole (143), and the fourth connecting hole (144) gradually increase in sequence.

6. The plug valve according to any one of claims 1 to 3, characterized in that, The valve core (1) includes a valve core body (15) and a collar (16). The valve core body (15) includes a first section (151) defining the valve core cavity (11) and a second section (152) extending axially from the first section (151). The five air inlets and the transition holes (126) are arranged circumferentially on the first section (151). The collar (16) is fitted onto the second section (152) and is configured to rotate with the valve core body (15). The five positioning grooves and the transition grooves (136) are arranged circumferentially on the outer periphery of the collar (16).

7. The plug valve according to claim 6, characterized in that, The outer periphery of the second section (152) of the valve core body (15) is provided with at least one outer periphery tangent (153), and the inner periphery of the collar (16) is provided with at least one tangent mating part (161). The tangent mating part (161) and the outer periphery tangent (153) abut against each other in a one-to-one correspondence.

8. The plug valve according to any one of claims 1 to 3, characterized in that, The valve body (2) is provided with an outer ring air passage (24), and the valve core (1) is provided with an air outlet (171) and an air outlet groove (172) extending along the third circumferential direction on the outer periphery, so that during the process of switching fluid communication between a part of the air inlet and the air inlet passage (22), the air outlet (171) can maintain fluid communication with the outer ring air passage (24) through the air outlet groove (172).

9. The plug valve according to any one of claims 1 to 3, characterized in that, The bottom of the valve core (1) has a gap (D) with the bottom of the valve core hole (21). The valve body (2) is provided with a central air passage (25). The inlet end of the central air passage (25) extends to the inner peripheral wall of the valve core hole (21) corresponding to the position of the gap (D).

10. A stove, characterized in that, The cooktop includes a stopcock valve according to any one of claims 1 to 8.

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