Constant flow valve, air valve and lighter

Abstract

The utility model discloses a constant flow valve which comprises a valve body and a ventilation module, the valve body comprises a valve body and a connecting part arranged below the valve body, the ventilation module is arranged in the connecting part, and an air outlet communicated with the ventilation module is formed in the upper portion of the valve body; a counter bore used for adjusting the gas output of the constant flow valve is formed between the ventilation module and the connecting part. The counter bore is formed and matched with the small air outlet, the initial ignition flame change is small so that the ignition flame stability can be improved, and meanwhile the situation that in the prior art, the air passing area of the ventilation module is determined through an embedded structure of an embedded flow limiting piece and the counter bore, and consequently the air output of the constant flow valve is affected is avoided. Therefore, the stability of flow is achieved, the stability of ignition flames is improved, and meanwhile machining is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of lighters, and in particular relates to a constant flow valve, a valve valve and a lighter. Background Art

[0002] The lighter has the characteristics of being easy to light and portable, wherein the lighter includes a body, a fuel storage chamber, and a valve valve connected to the fuel storage chamber and the outside as needed, wherein the valve valve is provided with a constant flow valve to improve the stability of gas delivery, such as the invention with announcement number CN216716294U and titled as a combined constant flow valve and a lighter using the constant flow valve, which specifically discloses a constant flow valve in which a flow limiting plate, a breathable membrane, and a valve pad are multi-layered and arranged inside the valve body, wherein the flow limiting plate is embedded in the flow limiting groove to make the flow rate of the fluid uniform, but this embedded arrangement is not conducive to assembly and processing, and the flow limiting plate has limited adjustment ability for the fluid, resulting in an unstable ignition flame; in addition, when the lighter is inverted, the flame becomes larger, which needs further improvement. Utility Model Content

[0003] The purpose of the utility model is to provide a constant flow valve, a valve valve and a lighter to solve the above-mentioned technical problems. A countersunk hole is set and matched with a smaller air outlet. The flame changes little during the initial ignition to improve the stability of the ignition flame. At the same time, it avoids the use of the interlocking structure of the existing technology through the interlocking current limiting plate. The countersunk hole determines the air flow area of ​​the air permeable module, thereby affecting the air outlet of the constant flow valve, so as to achieve the stability of the flow rate and thus improve the stability of the ignition flame. At the same time, it is easy to process.

[0004] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0005] A constant flow valve, comprising a valve body and a vent module, wherein the valve body comprises a valve body main body and a connecting portion arranged below the valve body main body, the vent module is arranged inside the connecting portion, and an air outlet connected to the vent module is arranged above the valve body main body; a countersunk hole for adjusting the air outlet volume of the constant flow valve is arranged between the vent module and the connecting portion;

[0006] Taking the center O of the valve body as the starting point, the maximum straight-line distance from the air outlet to the edge along the radial direction is OA, and the maximum straight-line distance from the valve body to the edge along the radial direction is OB. The ratio of OA to OB is 1:4 to 1:8. The air outlet is arranged in the middle of the valve body and along the axial direction of the valve body, and the air outlet is coaxial with the valve body;

[0007] The arrangement of the countersunk hole determines the air flow area of ​​the air permeable membrane of the air permeable module to adjust the air output of the constant flow valve. The countersunk hole is arranged coaxially with the constant flow valve.

[0008] A countersunk hole is set in combination with a smaller air outlet, and the flame changes little during the initial ignition, so as to improve the stability of the ignition flame. At the same time, the use of the interlocking structure of the current limiting plate in the prior art is avoided. The countersunk hole determines the air flow area of ​​the breathable module, thereby affecting the air outlet of the constant flow valve, so as to achieve flow stability and thus improve the stability of the ignition flame, while facilitating processing.

[0009] The interlocking structure of the interlocking current limiting plate is avoided, the interlocking process is omitted, and the constant flow valve can be made by direct assembly, thereby reducing the difficulty of assembly.

[0010] Preferably, with the center O of the valve body as the starting point, the maximum straight-line distance from the counterbore to the edge along the radial direction is OC, the maximum straight-line distance from the valve body to the edge along the radial direction is OB, and the ratio of OC to OB is 1:3 to 1:2. The size of the counterbore relative to the valve body can be adjusted accordingly according to the requirements of the gas passing area to adjust the gas outlet required by the finished product.

[0011] Preferably, the vent module includes a vent film and a film pressing part that are arranged in contact with each other, the side of the vent film away from the film pressing part is in conflict with the connecting part, and the countersunk hole is arranged between the vent film and the connecting part. The countersunk hole is formed after the space defined by the conflict between the vent film and the connecting part, and the countersunk hole is in contact with the vent film, so that the air flow area of ​​the vent film is limited by the size of the countersunk hole, so that the air output is relatively stable, thereby achieving a stable ignition effect. At the same time, the difficulty of assembly is reduced by arranging layer by layer.

[0012] Preferably, a boss is provided in the connecting part, the boss contacts the side of the breathable membrane away from the membrane pressing part, and the countersunk hole is provided in the boss. The boss is provided so that the countersunk hole has a certain thickness in the axial direction, so that the fluid has a channel for circulation.

[0013] Preferably, the connecting part is fixedly arranged below the valve body; along the axial direction of the valve body, the air outlet, the countersunk hole, the breathable membrane, and the film pressing part are arranged in sequence. By arranging them layer by layer, the air passing area is adjusted after the countersunk hole and the breathable membrane are fitted, so as to improve the stability of the ignition flame, facilitate assembly and processing, and reduce the difficulty of assembly. The fluid is transmitted through the film pressing part, the breathable membrane, the countersunk hole, the first through hole, and the air outlet, and each component is coaxially arranged for easy transmission.

[0014] Preferably, a sealing rubber ring is provided below the valve body, a connecting portion is provided on one side of the sealing rubber ring, and the film pressing portion contacts the sealing rubber ring;

[0015] Along the axial direction of the valve body, the air outlet, the sealing rubber ring, the film pressing part, the air permeable film, and the countersunk hole are arranged in sequence. The constant flow valve is assembled by combining multiple components layer by layer. This assembly method is relatively simple and avoids the greater assembly difficulty caused by the internal fitting method. The fluid is transmitted through the countersunk hole, the air permeable film, the film pressing part, the sealing rubber ring, the first through hole, and the air outlet. The components are coaxially arranged for easy transmission.

[0016] Preferably, the sealing rubber ring includes a rubber ring body and a vertical portion arranged perpendicular to the rubber ring body, wherein the two sides of the rubber ring body are respectively in contact with the valve body and the connecting portion; the two sides of the vertical portion are respectively in contact with the valve body and the film pressing portion. The rubber ring body is provided with the vertical portion, so that the sealing rubber ring has a contact position with the valve body, the film pressing portion, and the connecting portion, thereby improving the sealing degree, and the multi-layer contact method is convenient for assembly.

[0017] A valve comprising any of the above-mentioned constant flow valves, wherein a plug body is disposed on one side of the valve body and is arranged opposite to the gas outlet, the plug body is arranged to abut against a valve needle, and a face valve sleeve is arranged around the outer periphery of one side of the valve body;

[0018] The valve needle is connected to an elastic part arranged between the valve needle and the face valve sleeve, the elastic part is in conflict with the inner surface of the face valve sleeve, and the face valve sleeve is connected to the sleeve body;

[0019] A drainage core connected to the air outlet is arranged below the connecting portion.

[0020] A lighter comprising the valve as described above.

[0021] This application has achieved beneficial technical effects:

[0022] The utility model is provided with a countersunk hole and a smaller air outlet, and the flame changes little during the initial ignition, so as to improve the stability of the ignition flame. At the same time, it avoids the use of the interlocking structure of the current limiting plate in the prior art. The countersunk hole determines the air flow area of ​​the air permeable module, thereby affecting the air outlet of the constant flow valve, so as to achieve the stability of the flow rate and thus improve the stability of the ignition flame, and at the same time facilitates processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic diagram of the structure of the utility model;

[0024] Figure 2 Shown is a schematic cross-sectional view of the utility model;

[0025] Figure 3 Shown is a schematic diagram of the explosion structure of the valve body and the venting module;

[0026] Figure 4 The figure shows the structure diagram of the valve body;

[0027] Figure 5 Shown Figure 4 AA section structural diagram;

[0028] Figure 6 Shown is a schematic diagram of the assembly of part of the structure of the utility model;

[0029] Figure 7 Another structural schematic diagram of the utility model is shown;

[0030] Figure 8 Shown is a schematic diagram of the exploded structure of the connection part and the sealing rubber ring;

[0031] Fig. 9 Another exploded structural diagram of the connection part and the sealing rubber ring is shown;

[0032] Fig.10 Shown is a schematic structural diagram of the connecting portion;

[0033] Fig.11 Shown Fig.10 BB-direction cross-sectional structural diagram;

[0034] Fig.12 The figure shows the schematic diagram of the structural arrangement of the inflated state of Example 2;

[0035] Fig.13 Shown is a schematic diagram of the assembly structure of Example 3 of the utility model;

[0036] Fig.14 Shown is a schematic cross-sectional view of the structure of Example 3 of the present utility model.

[0037] Reference numerals

[0038] 1-valve body; 2-connecting part; 3-ventilation module; 4-air outlet; 5-counterbore; 31-ventilation membrane; 32-film pressing part; 21-boss; 6-sealing rubber ring; 61-rubber ring body; 62-vertical part; 71-plug body; 72-valve needle; 73-valve sleeve; 74-elastic part; 75 sleeve body; 76-drainage core; 77-third sealing ring; 78-cavity; 721-connecting port; 731-rotating part; 8-first sealing ring; 761-zinc sleeve; 762-second sealing ring; 11-convex part; 22-opening end; 12-first through hole; 321-second through hole; 63-third through hole; 9-edge; 7611-drainage groove. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0040] The technical solution of the utility model is described in detail below with specific embodiments.

[0041] Example 1

[0042] Reference Figure 1-Figure 6 A constant flow valve comprises a valve body and a vent module 3, wherein the valve body comprises a valve body main body 1 and a connecting portion 2 arranged below the valve body main body 1, the vent module 3 is arranged inside the connecting portion 2, and an air outlet 4 connected to the vent module 3 is arranged above the valve body main body 1; a countersunk hole 5 for adjusting the air outlet volume of the constant flow valve is arranged between the vent module 3 and the connecting portion 2;

[0043] Taking the center O of the valve body 1 as the starting point, the maximum straight-line distance from the air outlet 4 to the edge along the radial direction is OA, and the maximum straight-line distance from the valve body 1 to the edge along the radial direction is OB, and the ratio of OA to OB is 1:4 to 1:8. The air outlet 4 is arranged in the middle of the valve body 1 and along the axial direction of the valve body 1, and the air outlet 4 is coaxially arranged with the valve body 1;

[0044] The arrangement of the countersunk hole 5 determines the air flow area of ​​the air permeable membrane of the air permeable module 3, so as to adjust the air output of the constant flow valve. The countersunk hole 5 is arranged coaxially with the constant flow valve.

[0045] The countersunk hole 5 is provided in combination with a smaller air outlet 4, so that the flame changes little during the initial ignition, thereby improving the stability of the ignition flame. At the same time, the use of the interlocking structure of the current limiting plate in the prior art is avoided. The countersunk hole 5 determines the air flow area of ​​the air permeable module 3, thereby affecting the air outlet volume of the constant flow valve, so as to achieve the stability of the flow rate and thus improve the stability of the ignition flame, while facilitating processing.

[0046] The interlocking structure of the interlocking current limiting plate is avoided, the interlocking process is omitted, and the constant flow valve can be made by direct assembly, thereby reducing the difficulty of assembly.

[0047] Taking the center O of the valve body 1 as the starting point, the maximum straight-line distance from the counterbore 5 to the edge along the radial direction is OC, and the maximum straight-line distance from the valve body 1 to the edge along the radial direction is OB, and the ratio of OC to OB is 1:3 to 1:2. The size of the counterbore 5 relative to the valve body 1 can be adjusted accordingly according to the requirements of the gas passing area to adjust the gas outlet required by the finished product.

[0048] The vent module 3 includes a vent film 31 and a film pressing part 32 that are arranged in close contact with each other. The side of the vent film 31 away from the film pressing part 32 is in conflict with the connecting part 2, and the countersunk hole 5 is arranged between the vent film 31 and the connecting part 2. The countersunk hole 5 is formed after the space defined by the conflict between the vent film 31 and the connecting part 2. The countersunk hole 5 is in contact with the vent film 31, so that the air passing area of ​​the vent film 31 is limited by the size of the countersunk hole 5, so that the air output is relatively stable, thereby achieving a stable ignition effect. At the same time, the difficulty of assembly is reduced by setting layer by layer.

[0049] The connection part 2 is provided with a boss 21, which contacts the side of the air permeable membrane 31 away from the membrane pressing part 32, and the countersunk hole 5 is provided in the boss 21. The boss 21 is provided so that the countersunk hole 5 has a certain thickness in the axial direction, so that the fluid has a flow channel.

[0050] The connecting portion 2 is fixedly arranged below the valve body 1; along the axial direction of the valve body 1, the air outlet 4, the countersunk hole 5, the air permeable membrane 31, and the film pressing portion 32 are arranged in sequence. By arranging layer by layer, the countersunk hole 5 is fitted with the air permeable membrane 31 and the air passing area is adjusted to improve the stability of the ignition flame, and at the same time, it is convenient for assembly and processing, and reduces the difficulty of assembly. The fluid is transmitted through the film pressing portion 32, the air permeable membrane 31, the countersunk hole 5, the first through hole, and the air outlet 4, and each component is coaxially arranged for easy transmission.

[0051] A valve comprising the constant flow valve as described above, wherein a plug body 71 disposed opposite to the gas outlet 4 is disposed on one side of the valve body 1, the plug body 71 is disposed against a valve needle 72, and a face valve sleeve 73 is disposed around the outer periphery of one side of the valve body 1;

[0052] The valve needle 72 is connected to an elastic part 74 disposed between the valve needle 72 and the face valve sleeve 73, the elastic part 74 is in conflict with the inner surface of the face valve sleeve 73, and the face valve sleeve 73 is connected to the sleeve body 75;

[0053] A guide core 76 connected to the air outlet 4 is disposed below the connecting portion 2 .

[0054] The elastic portion 74 is a spring, wherein a third sealing ring 77 is disposed above the elastic portion 74 , wherein the third sealing ring is disposed in contact with the joint between the valve needle 72 and the face valve sleeve 73 to improve the sealing degree of the cavity 78 .

[0055] A cavity 78 is provided between the face valve sleeve 73 and the valve needle 72, and the cavity 78 is communicated with the interior of the valve needle 72, wherein the valve needle 72 is provided with a communication port 721 communicating with the cavity 78 and the interior of the valve needle 72, and the valve needle 72 is communicated with the outside;

[0056] A rotating part 731 is provided above the valve sleeve 73 to facilitate adjusting the size of the flame.

[0057] The plug body 71 and the valve needle 72 are both partially disposed in the valve body 1;

[0058] A first sealing ring 8 is disposed between the valve body 1 and the sleeve 71. The first sealing ring 8 is disposed to prevent fluid from leaking from between the valve body 1 and the sleeve 75 to the outside.

[0059] A lighter comprising the valve as described above.

[0060] The drainage core 76 is sleeved with a zinc sleeve 761, the zinc sleeve 761 is sleeved with the sleeve body 75, the zinc sleeve 761 is arranged between the drainage core 761 and the sleeve body 75, the zinc sleeve 761 is provided with a drainage groove 7611 connected to the drainage core 76, and a second sealing ring 762 is arranged between the zinc sleeve 761 and the sleeve body 75;

[0061] The face valve sleeve 73 is provided with an external thread connected to the sleeve body 75;

[0062] The air permeable membrane 31 is a liquid contact air permeable membrane, and the gas output remains unchanged and the flame is stable when the lighter is upright or inverted;

[0063] The valve body 1 is provided with a convex portion 11 on one side of the air outlet. The convex portion 11 facilitates the deformation of the plug body 71 when the valve body 1 conflicts with the plug body 71, thereby improving the sealing degree when no operation is required, wherein the cross-sectional shape of the plug body 71 is a "T" shape.

[0064] The film pressing part 32 is a film pressing aluminum sheet, which is a metal aluminum part with high heat conduction efficiency. When the lighter is used for a long time, the gasification needs to absorb heat, and the metal part can better transmit the heat energy.

[0065] The connecting portion is provided with an open end 22, and the open end 22 is connected to the drainage core 76 to transmit gas;

[0066] A first through hole 12 connected to the air outlet 4 is provided in the middle of the valve body 1, wherein the first through hole 12 is provided to facilitate the processing of the air outlet 4. The first through hole 12 with a larger diameter is provided to facilitate the determination of the size of the air outlet 4 at one end and facilitate processing. A second through hole 321 coaxially provided with the valve body 1 is provided in the middle of the film pressing part 32. The air outlet 4, the first through hole 12, the air permeable film 31, the second through hole 321, and the opening end 22 are sequentially provided along the axis of the valve body 1 and are interconnected.

[0067] The connecting part 2 and the film pressing part 32 are riveted structures, which are firm and reliable;

[0068] When the ignition operation is required, the valve needle 72 is moved axially upward. At this time, the plug body 71 releases the resistance of the valve needle 72 to it, and the fluid is transmitted through the drainage core 76 to the open end 22, the second through hole 321, the air permeable membrane 31, the counterbore 5, the first through hole 12, and the air outlet 4 to flow into the inside of the valve needle 72, and is transported to the outside through the valve needle 72 to complete the gas supply operation.

[0069] Example 2

[0070] This embodiment only describes the differences from the above-mentioned embodiment 1, and other technical features are the same. In this embodiment, refer to Figure 7-12 A sealing rubber ring 6 is disposed below the valve body 1, a connecting portion 2 is disposed on one side of the sealing rubber ring 6, and the film pressing portion 32 is in conflict with the sealing rubber ring 6;

[0071] Along the axial direction of the valve body 1, the air outlet 4, the sealing rubber ring 6, the film pressing part 32, the air permeable membrane 31, and the countersunk hole 5 are arranged in sequence. The constant flow valve is assembled by combining multiple components layer by layer. This assembly method is relatively simple and avoids the greater assembly difficulty caused by the internal fitting method. The fluid is transmitted through the countersunk hole 5, the air permeable membrane 31, the film pressing part 32, the sealing rubber ring 6, the first through hole, and the air outlet 4. The components are coaxially arranged for easy transmission.

[0072] The sealing rubber ring 6 includes a rubber ring body 61 and a vertical portion 62 arranged perpendicular to the rubber ring body 61, wherein the two sides of the rubber ring body 61 are respectively in contact with the valve body 1 and the connecting portion 2; the two sides of the vertical portion 62 are respectively in contact with the valve body 1 and the film pressing portion 32. The rubber ring body 61 is provided with the vertical portion 62, so that the sealing rubber ring 6 has a contact position with the valve body 61, the film pressing portion 32, and the connecting portion 2, thereby improving the sealing degree, and the multi-layer contact method is convenient for assembly.

[0073] The drainage core 76 is sleeved with a zinc sleeve 761, and the zinc sleeve 761 is sleeved with a sleeve body 75. The zinc sleeve 761 is arranged between the drainage core 761 and the sleeve body 75;

[0074] The face valve sleeve 73 is provided with an external thread connected to the sleeve body 75;

[0075] The air permeable membrane 31 is a liquid contact air permeable membrane, and the gas output remains unchanged and the flame is stable when the lighter is upright or inverted;

[0076] A first through hole 12 connected to the air outlet 4 is provided in the middle of the valve body 1, wherein the provision of the first through hole 12 facilitates the processing of the air outlet 4. The provision of the first through hole 12 with a larger diameter facilitates the determination of the size of the air outlet 4 at one end and facilitates processing. A second through hole 321 coaxially arranged with the valve body 1 is provided in the middle of the film pressing portion 32, a third through hole 63 coaxially arranged with the valve body 1 is provided in the middle of the rubber ring body 6, and a fourth through hole 23 is provided at one end of the connecting portion 2 away from the counterbore 5, and the fourth through hole 23 is connected to the drainage core 76 to transmit gas; the air outlet 4, the first through hole 12, the third through hole 63, the second through hole 321, the air permeable membrane 31, the counterbore 5, and the fourth through hole 23 are sequentially arranged along the axis of the valve body and are interconnected;

[0077] When ignition operation is required, the valve needle 72 is moved axially upward. At this time, the plug body 71 releases the resistance of the valve needle 72 to it, and the fluid is transmitted through the drainage core 76 to the fourth through hole 23, the counterbore 5, the air permeable membrane 31, the second through hole 321, the third through hole 63, the first through hole 12, and the air outlet 4 to flow into the inside of the valve needle 2, and is transported to the outside through the valve needle 72 to complete the gas supply operation.

[0078] The constant current sheet composed of the vent module and the connection part and the outlet face valve assembly composed of the valve needle and the face valve sleeve are separated into two independent components, which is convenient for inflation from the face valve assembly. Fig.12 During assembly, the air outlet surface valve combination and the sealing rubber ring 6, the breathable module and the connecting part 2 below are two sets of components in a separated state. The inflation operation is performed through the air outlet surface valve combination. Since they are two separate sets of components, the fluid flows through the air outlet 4 to the gap between the two separated sets of components, and then flows to the sealing rubber ring 6, the breathable module and the edge 9 of the connecting part 2 below. The zinc sleeve 761 is provided with a plurality of drainage grooves 7611 connected to the drainage core 76. The fluid flows to the drainage core 76 through the drainage grooves to complete the inflation operation from the top. This inflation method is simple and convenient, and avoids the problem in the prior art that it is difficult to inflate directly from the air outlet surface valve combination due to the presence of a breathable membrane. In the present technical solution, the two sets of components are separated and the fluid is transported from the edge, so that the need to inflate through the breathable membrane is avoided, thereby achieving the effects of quick inflation and low operation difficulty.

[0079] Example 3

[0080] This embodiment only describes the differences from the above-mentioned embodiment 1, and other technical features are the same. In this embodiment, refer to Fig.13 , Fig.14The guide core 76 is sleeved in the sleeve body 75, wherein the sleeve body 75 is dedicated to the POM lighter body, and is positioned by squeezing multiple annular fittings on the surface of the metal face valve sleeve 73 to the positioning holes inside the sleeve body, so that the annular fittings can continuously contact the inner surface of the sleeve body to fix the face valve sleeve. The upper part of the face valve sleeve 73 is flush with the upper part of the sleeve body 75;

[0081] The air permeable membrane 31 is a liquid contact air permeable membrane, and the gas output remains unchanged and the flame is stable when the lighter is upright or inverted;

[0082] The connection portion is provided with an open end 22, and the open end 22 is connected to the drainage core 761 to transmit gas.

[0083] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0085] The above is a detailed description of the embodiments of a constant flow valve, a valve valve and a lighter provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A constant flow valve, comprising a valve body and a venting module (3), characterized in that: The valve body comprises a valve body (1), a connecting portion (2) arranged below the valve body (1), the ventilation module (3) being arranged inside the connecting portion (2), and an air outlet (4) being arranged above the valve body (1) and being connected to the ventilation module (3); a countersunk hole (5) for adjusting the air outlet volume of the constant flow valve is arranged between the ventilation module (3) and the connecting portion (2); Taking the center O of the valve body (1) as the starting point, the maximum straight-line distance from the air outlet (4) to the edge along the radial direction is OA, and the maximum straight-line distance from the valve body (1) to the edge along the radial direction is OB, and the ratio of OA to OB is 1:4 to 1:

8.

2. The constant flow valve according to claim 1, characterized in that: Taking the center O of the valve body (1) as the starting point, the maximum straight-line distance from the counterbore (5) to the edge along the radial direction is OC, and the maximum straight-line distance from the valve body (1) to the edge along the radial direction is OB. The ratio of OC to OB is 1:3 to 1:

2.

3. The constant flow valve according to claim 1, characterized in that: The breathable module (3) comprises a breathable membrane (31) and a film pressing portion (32) which are arranged in close contact with each other, the side of the breathable membrane (31) away from the film pressing portion (32) is in contact with the connecting portion (2), and the countersunk hole (5) is arranged between the breathable membrane (31) and the connecting portion (2).

4. The constant flow valve according to claim 3, characterized in that: A boss (21) is arranged in the connecting portion (2), the boss (21) abuts against a side of the air permeable membrane (31) away from the membrane pressing portion (32), and the countersunk hole (5) is arranged in the boss (21).

5. The constant flow valve according to claim 3, characterized in that: The connecting portion (2) is fixedly arranged below the valve body (1); along the axial direction of the valve body (1), the air outlet (4), the countersunk hole (5), the air permeable membrane (31), and the film pressing portion (32) are arranged in sequence.

6. The constant flow valve according to claim 3, characterized in that: A sealing rubber ring (6) is arranged below the valve body (1), a connecting portion (2) is arranged on one side of the sealing rubber ring (6), and the film pressing portion (32) is in contact with the sealing rubber ring (6); Along the axial direction of the valve body (1), the air outlet (4), the sealing rubber ring (6), the film pressing part (32), the air permeable membrane (31), and the countersunk hole (5) are arranged in sequence.

7. The constant flow valve according to claim 6, characterized in that: The sealing rubber ring (6) comprises a rubber ring body (61) and a vertical portion (62) arranged perpendicular to the rubber ring body (61), wherein two sides of the rubber ring body (61) are respectively in contact with the valve body (1) and the connecting portion (2); and two sides of the vertical portion (62) are respectively in contact with the valve body (1) and the film pressing portion (32).

8. A valve comprising a constant flow valve as claimed in any one of claims 1 to 7, characterized in that: A plug body (71) is disposed on one side of the valve body (1) and is arranged opposite to the air outlet (4); the plug body (71) is arranged to abut against a valve needle (72); and a face valve sleeve (73) is arranged around the outer periphery of one side of the valve body (1); The valve needle (72) is connected to an elastic part (74) disposed between the valve needle (72) and the face valve sleeve (73), the elastic part (74) is in conflict with the inner surface of the face valve sleeve (73), and the face valve sleeve (73) is connected to the sleeve body (75); A drainage core (76) connected to the air outlet (4) is provided below the connecting portion (2).

9. The valve according to claim 8, characterized in that: A first sealing ring (8) is provided between the valve body (1) and the sleeve (75).

10. A lighter comprising the valve according to claim 9.

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