Premixers and gas installations

Abstract

This invention discloses a premixer and a gasification device. The premixer includes a premixer body, a gas distribution component, an adjusting shaft, and a gas regulating component. The premixer body has a gas passage. The gas distribution component has a first gas distribution hole, a second gas distribution hole, and a third gas distribution hole, which are respectively connected to the gas passage. The pattern formed by the first gas distribution hole and the pattern formed by the second gas distribution hole are not congruent. The gas regulating component is disposed on the adjusting shaft and located within the gas passage. When the gas regulating component rotates within a first angular range, the second gas distribution hole is blocked, and the third gas distribution hole is fully opened. The gas regulating component adjusts the gas passage area of ​​the first gas distribution hole by rotating. When the gas regulating component rotates within a second angular range, the first gas distribution hole is blocked, and the third gas distribution hole is fully opened. The gas regulating component adjusts the gas passage area of ​​the second gas distribution hole by rotating.

Description

Technical Field

[0001] This invention relates to the field of gas heating technology, and in particular to a premixer and gas equipment. Background Technology

[0002] Gas appliances such as gas water heaters, wall-hung boilers, and gas stoves typically use fully premixed combustion. Fully premixed combustion refers to the process in which air and gas are premixed in a certain proportion to form a premixed gas, which is then ignited and burned in the burner.

[0003] The premixer is a crucial component of a fully premixed gas appliance. It mixes air and gas in a specific ratio to ensure optimal air-fuel ratio during combustion. However, existing premixers are limited in function, cannot adapt to different gas sources, and have poor applicability. Summary of the Invention

[0004] The main objective of this invention is to provide a premixer and gas equipment that improves the applicability of the premixer.

[0005] To achieve the above objectives, the premixer proposed in this invention includes:

[0006] The premixer body has a gas passage;

[0007] A gas distribution component, at least a portion of which is disposed within the gas channel, wherein the gas distribution component is provided with a first gas distribution hole, a second gas distribution hole, and a third gas distribution hole respectively communicating with the gas channel, the first gas distribution hole and the second gas distribution hole are spaced apart, and the pattern formed by the first gas distribution hole and the pattern formed by the second gas distribution hole are not congruent.

[0008] An adjusting shaft, at least a portion of which is rotatably disposed within the gas passage; and

[0009] A gas regulator is mounted on the regulating shaft and located within the gas passage; the gas regulator can rotate synchronously with the regulating shaft.

[0010] When the gas regulator rotates within the first angle range, the second gas distribution hole is blocked and the third gas distribution hole is fully opened. The gas regulator adjusts the gas passage area of ​​the first gas distribution hole by rotating, so as to adjust the amount of gas flowing through the first gas distribution hole.

[0011] When the gas regulator rotates within the second angle range, the first gas distribution hole is blocked and the third gas distribution hole is fully opened. The gas regulator adjusts the gas passage area of ​​the second gas distribution hole by rotating, thereby adjusting the amount of gas flowing through the second gas distribution hole.

[0012] In one embodiment, the first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are spaced apart along the axial direction of the gas regulating member;

[0013] And / or, the third gas distribution hole is spaced apart from the first gas distribution hole and the second gas distribution hole and is located between the first gas distribution hole and the second gas distribution hole;

[0014] And / or, the first angle range and the second angle range do not overlap.

[0015] In one embodiment, the first gas distribution hole is used to supply the first gas, the second gas distribution hole is used to supply the second gas, the minimum gas passage area required when the first gas is under minimum load is S1, the minimum gas passage area required when the second gas is under minimum load is S2, S1 is greater than S2, and the area of ​​the third gas distribution hole is S2.

[0016] In one embodiment, the gas distribution component is further provided with a fourth gas distribution hole communicating with the gas passage. The fourth gas distribution hole is spaced apart from the third gas distribution hole, and the area of ​​the fourth gas distribution hole is the difference between S1 and S2.

[0017] When the gas regulator rotates within the first angle range, the fourth gas distribution hole is fully opened; when the gas regulator rotates within the second angle range, the fourth gas distribution hole is blocked.

[0018] In one embodiment, the maximum gas flow area of ​​the first gas distribution hole is greater than the maximum gas flow area of ​​the second gas distribution hole, and the fourth gas distribution hole is located close to the first gas distribution hole. The fourth gas distribution hole is connected to or spaced apart from the first gas distribution hole.

[0019] In one embodiment, the number of the first gas distribution holes is one or more; the number of the second gas distribution holes is one or more; and the number of the third gas distribution holes is one or more.

[0020] In one embodiment, the number of the first gas distribution holes is multiple, and any two of the first gas distribution holes have the same area, or at least two of the first gas distribution holes have different areas.

[0021] The number of the second gas distribution holes is multiple, and any two of the second gas distribution holes have the same area, or at least two of the second gas distribution holes have different areas;

[0022] The number of the third gas distribution holes is multiple, and any two of the third gas distribution holes have the same area, or at least two of the third gas distribution holes have different areas.

[0023] In one embodiment, the number of the fourth gas distribution holes is one or more.

[0024] In one embodiment, there are multiple fourth gas distribution holes, and any two fourth gas distribution holes have the same area, or at least two fourth gas distribution holes have different areas.

[0025] In one embodiment, the gas distribution component has a gas distribution cavity and a gas inlet, a first gas distribution hole, a second gas distribution hole, and a third gas distribution hole respectively connected to the gas distribution cavity. The gas regulating component is rotatably disposed in the gas distribution cavity, and the gas inlet is used to communicate with an external gas source.

[0026] In one embodiment, the first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are circumferentially spaced on the sidewall of the gas distribution component around the adjusting shaft.

[0027] And / or, the number of the gas regulators is one;

[0028] And / or, the gas regulator includes a fan-shaped baffle or a fan-shaped baffle block.

[0029] In one embodiment, the gas regulating component includes a first gas regulating part and a second gas regulating part disposed on the regulating shaft, wherein the first gas regulating part and the second gas regulating part can rotate synchronously with the regulating shaft within the gas distribution chamber;

[0030] When the adjusting shaft rotates within the first angle range, the first gas adjusting part fully or partially opens the first gas distribution hole, the second gas adjusting part blocks the second gas distribution hole, and the third gas distribution hole is fully opened;

[0031] When the adjusting shaft rotates within the second angle range, the first gas adjusting part blocks the first gas distribution hole, the third gas distribution hole is fully opened, and the second gas adjusting part adjusts the gas passage area of ​​the second gas distribution hole by rotating.

[0032] In one embodiment, the gas regulating component includes a first gas regulating part and a second gas regulating part, both of which are disposed on the regulating shaft and can rotate synchronously with the regulating shaft;

[0033] When the adjusting shaft rotates within the first angle range, the first gas adjusting part adjusts the gas passage area of ​​the first gas distribution hole by rotating, the second gas adjusting part blocks the second gas distribution hole, the third gas distribution hole is fully opened, and the first gas adjusting part fully opens the fourth gas distribution hole.

[0034] When the adjusting shaft rotates within the second angle range, the first gas adjusting part blocks the first gas distribution hole and the fourth gas distribution hole, the third gas distribution hole is fully opened, and the second gas adjusting part adjusts the gas passage area of ​​the second gas distribution hole by rotating.

[0035] In one embodiment, the gas distribution component has a gas distribution cavity and a gas inlet, a first gas distribution hole, a second gas distribution hole, a third gas distribution hole, and a fourth gas distribution hole, which are respectively connected to the gas distribution cavity. The gas inlet is used to communicate with an external gas source. The first gas regulating part and the second gas regulating part are rotatably disposed in the gas distribution cavity.

[0036] And / or, the first gas regulating part and the second gas regulating part are spaced apart along the axial direction of the regulating shaft, and the projection of the third gas distribution hole along the axial direction of the third gas distribution hole, the third gas distribution hole is located between the first gas regulating part and the second gas regulating part.

[0037] In one embodiment, the first gas distribution hole, the second gas distribution hole, the third gas distribution hole, and the fourth gas distribution hole are all located on the first side of the gas distribution component; the gas inlet hole is located on the second side of the gas distribution component, and the first side and the second side are arranged adjacent to or opposite to each other;

[0038] And / or, the number of the gas inlet ports is one or more;

[0039] And / or, the first gas regulating part and the second gas regulating part are spaced apart along the axial direction of the regulating shaft, and at least a portion of the gas inlet hole is located between the first gas regulating part and the second gas regulating part, as projected along the axial direction of the gas inlet hole.

[0040] In one embodiment, the first gas regulating part and the regulating shaft form a first gas supply groove, or the first gas regulating part is provided with a first gas supply groove; the second gas regulating part and the regulating shaft form a second gas supply groove, or the second gas regulating part is provided with a second gas supply groove.

[0041] When the first gas regulating unit and the second gas regulating unit rotate within the first angle range, a portion of the opening of the first gas supply groove is positioned facing the first gas distribution hole or facing outward from the first gas distribution hole, and a portion of the opening of the first gas supply groove is positioned facing the fourth gas distribution hole; the opening of the second gas supply groove is positioned facing outward from the second gas distribution hole, and the outer peripheral wall of the second gas regulating unit blocks the second gas distribution hole;

[0042] When the first gas regulating unit and the second gas regulating unit rotate within the second angle range, the opening of the first gas supply groove is oriented towards the outside of the first gas distribution hole and the outside of the fourth gas distribution hole, and the outer peripheral wall of the first gas regulating unit blocks the first gas distribution hole and the fourth gas distribution hole; the opening of the second gas supply groove is oriented towards the second gas distribution hole or towards the outside of the second gas distribution hole.

[0043] In one embodiment, the first gas regulating part is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft, and together with the remaining outer peripheral wall of the regulating shaft, forms the first gas supply groove. The first gas supply groove has a first slot and a second slot. The first slot is opened along the axial direction of the regulating shaft toward the second gas regulating part and communicates with the gas inlet hole. The second slot is opened radially outward along the regulating shaft. The second slot is configured to selectively face the first gas distribution hole and / or the fourth gas distribution hole as the first gas regulating part rotates.

[0044] In one embodiment, the gas regulating component further includes a first gas blocking part, which is disposed at one end of the first gas supply groove along the axial direction of the regulating shaft away from the first slot opening. The first slot opening is located between the first gas blocking part and the second gas regulating part. The first gas blocking part is used to block the end of the first gas supply groove away from the gas inlet.

[0045] In one embodiment, the second gas regulating part is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft, and together with the remaining outer peripheral wall of the regulating shaft, forms the second gas supply groove. The second gas supply groove has a third groove and a fourth groove. The third groove is opened along the axial direction of the regulating shaft toward the first gas regulating part and communicates with the gas inlet hole. The fourth groove is opened along the radial direction of the regulating shaft toward the direction away from the second groove. The fourth groove is configured to selectively face the second gas distribution hole as the second gas regulating part rotates.

[0046] In one embodiment, the gas regulator further includes a second gas blocking part, which is disposed at one end of the second gas supply groove away from the third slot along the axial direction of the regulating shaft. The third slot is located between the second gas blocking part and the first gas regulator. The second gas blocking part is used to block the end of the second gas supply groove away from the gas inlet.

[0047] In one embodiment, the first gas regulating part is provided with a first gas passage hole located between the regulating shaft and the outer peripheral wall of the first gas regulating part, and the first gas passage hole passes through the opposite sides of the first gas regulating part along the circumferential direction of the regulating shaft.

[0048] And / or, the second gas regulating part is provided with a second gas passage hole located between the regulating shaft and the outer peripheral wall of the second gas regulating part, and the second gas passage hole passes through the opposite sides of the second gas regulating part along the circumferential direction of the regulating shaft.

[0049] In one embodiment, the cavity walls of the gas distribution chambers at the first gas distribution hole and the second gas distribution hole are both circular in cross-section along the radial direction of the adjustment axis;

[0050] And / or, the first gas regulating part has a first arcuate outer wall surface adapted to the cavity wall of the gas distribution cavity; the second gas regulating part has a second arcuate outer wall surface adapted to the cavity wall of the gas distribution cavity.

[0051] In one embodiment, the first gas regulating section is arranged in a fan shape in the radial section along the regulating axis;

[0052] And / or, the second gas regulating section is arranged in a fan shape in the radial section along the regulating axis.

[0053] In one embodiment, the gas distribution component is provided with a first mounting hole communicating with the gas distribution cavity, and the first gas regulating part and the second gas regulating part are installed in the gas distribution cavity through the first mounting hole; the opening direction of the first mounting hole faces the axial direction of the regulating shaft;

[0054] And / or, the centerline of the first mounting hole coincides with the axis of the adjusting shaft.

[0055] In one embodiment, the gas distribution component has a first sidewall and a second sidewall opposite to each other, and a third sidewall and a fourth sidewall located between the first sidewall and the second sidewall and arranged circumferentially around the gas regulating component. The third sidewall and the fourth sidewall are arranged adjacent to or opposite to each other. The first mounting hole is provided on the first sidewall, and the second sidewall is provided with a second mounting hole for the regulating shaft to pass through. The gas inlet is provided on the third sidewall. The first gas distribution hole, the second gas distribution hole, the third gas distribution hole and the fourth gas distribution hole are all provided on the fourth sidewall and are spaced apart.

[0056] In one embodiment, the premixer body includes a base and a cover plate. The base is provided with the gas passage, and one side of the base is provided with an installation port communicating with the gas passage. The gas distributor is installed in the gas passage through the installation port, and the cover plate is detachably closed to the installation port. The premixer body includes an regulator, and one end of the regulating shaft passes through the cover plate and is drivenly connected to the regulator.

[0057] And / or, the regulating shaft and the gas regulating element are an integral structure.

[0058] In one embodiment, the premixer body further includes an air passage and a mixing passage connecting the gas passage and the air passage. The premixer body also includes an air conditioning element rotatably disposed within the air passage. The air conditioning element is configured to adjust the air passage area by rotation to regulate the amount of air flowing into the mixing passage.

[0059] In one embodiment, the premixer body further includes an air passage and a mixing passage connecting the gas passage and the air passage. The premixer body also includes an air conditioning element disposed on the adjustment shaft and located within the air passage. The air conditioning element is configured to adjust the air passage area of ​​the air passage as the adjustment shaft rotates, thereby adjusting the amount of air flowing into the mixing passage. The gas conditioning element is used to adjust the amount of gas flowing into the mixing passage.

[0060] In one embodiment, the gas passage includes a gas equalization chamber. The gas outlets of the first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are all connected to the gas mixing passage through the gas equalization chamber. The gas equalization chamber has a corner to ensure that the gas flows into the gas mixing passage evenly.

[0061] In one embodiment, the air flow direction along the air passage is parallel to the flow direction of the gas as it passes through at least one of the first gas distribution hole and the second gas distribution hole.

[0062] In one embodiment, the first gas distribution hole and the second gas distribution hole are disposed on the same plate of the gas distribution component and are spaced apart; a gas injection inlet is formed at the intersection of the gas uniform flow chamber and the gas mixing channel; along the axial direction of the adjusting shaft, the corner is located between the first gas distribution hole and the gas injection inlet; in the flow direction of gas through the first gas distribution hole, the corner and the gas injection inlet are offset; along the axial projection of the adjusting shaft, the gas injection inlet and the first gas distribution hole are located on the same side of the corner, so that the flow direction of gas in a part of the gas channel is opposite to the flow direction of gas when passing through the first gas distribution hole.

[0063] In one embodiment, the premixer further includes a Venturi tube having a Venturi channel and an air inlet, a gas injection inlet, and a mixed gas outlet communicating with the Venturi channel. The Venturi tube is disposed within the mixed gas channel, the air inlet is communicating with the air channel, the gas injection inlet is communicating with the gas channel, and the Venturi channel is used to allow air from the air channel to flow in and to inject gas from the gas channel for mixing of air and gas.

[0064] In one embodiment, the venturi tube includes a first section and a second section. The first section includes a tapered section and a transition section arranged sequentially along the air outlet direction of the air passage. The end of the tapered section away from the transition section has the air inlet. The end of the transition section away from the tapered section is inserted into the second section. The outer wall of the transition section is spaced apart from the inner wall of the second section to form the gas injection inlet. The air passage area of ​​the air inlet is larger than the air passage area of ​​the transition section, and the air passage area of ​​the transition section is smaller than the air passage area of ​​the second section.

[0065] In one embodiment, the gas injection inlet is arranged in a ring shape, and the venturi tube further includes a connecting portion, at least a portion of which is disposed within the gas injection inlet and connects the outer wall of the transition section with the inner wall of the second pipe section to separate the gas injection inlet.

[0066] This invention also proposes a premixer, comprising a premixer body, an adjusting shaft, and a gas regulating component. The premixer body has a gas passage and a gas distribution chamber disposed within the gas passage. The inner wall of the gas distribution chamber is cylindrical. A first gas distribution hole, a second gas distribution hole, a third gas distribution hole, a fourth gas distribution hole, and a gas inlet hole are formed on the side wall of the gas distribution chamber. The first, second, and third gas distribution holes are spaced apart from each other, and the third and fourth gas distribution holes are spaced apart. The pattern formed by the first and second gas distribution holes is not congruent to the pattern formed by the second and third gas distribution holes. The adjusting shaft rotatably passes through the gas distribution chamber. The gas regulating component is disposed within the gas distribution chamber. On a portion of the outer peripheral wall of the adjusting shaft, the gas regulating component has an arc-shaped outer wall surface that matches the inner wall of the gas distribution chamber. When the gas regulating component rotates within a first angular range, the second gas distribution hole is blocked, and the third and fourth gas distribution holes are fully opened. The gas regulating component adjusts the air passage area of ​​the first gas distribution hole by rotating, thereby regulating the amount of gas flowing through the first gas distribution hole. When the gas regulating component rotates within a second angular range, the first and fourth gas distribution holes are blocked, and the third gas distribution hole is fully opened. The gas regulating component adjusts the air passage area of ​​the second gas distribution hole by rotating, thereby regulating the amount of gas flowing through the second gas distribution hole.

[0067] In one embodiment, the number of the first gas distribution holes is one or more; the number of the second gas distribution holes is one or more; the number of the third gas distribution holes is one or more; and the number of the fourth gas distribution holes is one or more.

[0068] The present invention also proposes a gas device, which includes a premixer as described above.

[0069] In the technical solution of this invention, the premixer includes a premixer body, a gas distribution component, an adjustment shaft, and a gas adjustment component. The gas distribution component is provided with a first gas distribution hole, a second gas distribution hole, and a third gas distribution hole, which are respectively connected to the gas channel. The first gas distribution hole and the second gas distribution hole are spaced apart. The pattern formed by the first gas distribution hole and the pattern formed by the second gas distribution hole are not congruent, so that the patterns formed by the first gas distribution hole and the second gas distribution hole cannot completely overlap. The first gas distribution hole and the second gas distribution hole can supply two different gases. For example, the first gas distribution hole is used to supply the first gas, and the second gas distribution hole is used to supply the second gas. When the gas adjustment component rotates within a first angle range, the premixer is suitable for mixing the first gas. When the gas adjustment component rotates within a second angle range, the premixer is suitable for mixing the second gas. In this way, the switching between the two different gases can be realized.

[0070] When the gas regulator rotates within the first and second angular ranges, the third gas distribution orifice is fully opened. At this time, both the first and second gases can pass through the third gas distribution orifice. The third gas distribution orifice is essentially a shared vent for both the first and second gas distribution orifices. The area of ​​the third gas distribution orifice is equal to the minimum vent area required for the second gas at its minimum load. This ensures that when the premixer mixes the second gas, the second gas only needs to flow along the third gas distribution orifice to meet the minimum load gas requirement. The second gas does not need to pass through the first and second gas distribution orifices, thus facilitating control of the gas regulator and ensuring that the third gas distribution orifice is open when the second gas is at its minimum load. The distribution holes provide accurate gas flow, thus improving the reliability of the premixer. Furthermore, the patterns formed by the first and second gas distribution holes are not perfectly aligned. By adjusting the gas flow through the first or second gas distribution hole using the gas regulator, not only can the switching between two different gases be achieved, but the curves of the gas regulator's adjustment of the gas flow area of ​​the first and second gas distribution holes are not entirely identical. This adapts to different gas loads, increasing the flexibility of the gas regulator. This allows the premixer of this application to be used for switching between different gases, meeting the needs of regions with different gas sources. The premixer of this application has good applicability and can be widely used. Attached Figure Description

[0071] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0072] Figure 1 This is a schematic diagram of the structure of an embodiment of the premixer provided by the present invention;

[0073] Figure 2 for Figure 1 A schematic diagram of the decomposed structure in the diagram;

[0074] Figure 3 for Figure 1 A cross-sectional view of the air conditioning and gas conditioning components at 180 degrees in the second angular range;

[0075] Figure 4 for Figure 1 A structural cross-sectional view of the air conditioning and gas conditioning components at 180 degrees in the second angular range from another perspective.

[0076] Figure 5 for Figure 4 A structural diagram from another perspective of the structure;

[0077] Figure 6 for Figure 1 A cross-sectional view of the air conditioning and gas conditioning components at 270 degrees in the second angular range;

[0078] Figure 7 for Figure 1 A structural cross-sectional view of the air conditioning and gas conditioning components at 270 degrees in the second angular range from another perspective;

[0079] Figure 8 for Figure 7 A structural diagram from another perspective of the structure;

[0080] Figure 9 This is a partial structural schematic diagram of an embodiment of the premixer of the present invention;

[0081] Figure 10 for Figure 9 A schematic diagram of the decomposed structure in the diagram;

[0082] Figure 11 for Figure 10 A schematic diagram of the gas distribution components in the middle;

[0083] Figure 12 for Figure 10A structural diagram of some of the components;

[0084] Figure 13 for Figure 12 A structural diagram from another perspective;

[0085] Figure 14 for Figure 13 A schematic diagram of the first and second openings of the first air supply tank in the middle;

[0086] Figure 15 for Figure 13 A structural diagram from another perspective;

[0087] Figure 16 for Figure 15 A schematic diagram of the third and fourth openings of the second air supply tank;

[0088] Figure 17 for Figure 2 A schematic diagram of the structure of a Venturi tube;

[0089] Figure 18 for Figure 17 A sectional view of the structure.

[0090] Explanation of icon numbers:

[0091] 10. Premixer;

[0092] 100. Premixer body; 110. Gas passage; 111. Gas flow equalization chamber; 112. Corner; 120. Air passage; 130. Mixing passage; 140. Base; 150. Cover plate; 160. Regulator; 170. Air conditioning component;

[0093] 200. Gas distribution component; 201. First sidewall; 202. Second sidewall; 203. Third sidewall; 204. Fourth sidewall; 210. First gas distribution hole; 220. Second gas distribution hole; 230. Third gas distribution hole; 240. Fourth gas distribution hole; 250. Gas distribution chamber; 260. Gas inlet hole; 270. First mounting hole; 280. Second mounting hole;

[0094] 300. Adjusting shaft;

[0095] 400. Gas regulating component; 410. First gas regulating section; 420. Second gas regulating section; 430. First gas supply slot; 431. First slot opening; 432. Second slot opening; 440. Second gas supply slot; 441. Third slot opening; 442. Fourth slot opening; 450. First gas blocking section; 460. Second gas blocking section;

[0096] 500, Venturi tube; 510, Venturi passage; 520, air inlet; 530, gas injection inlet; 540, mixed gas outlet; 550, first pipe section; 551, tapering section; 552, transition section; 560, second pipe section; 570, connection part;

[0097] 600. First sealing element;

[0098] 700. Second seal.

[0099] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0100] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0101] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0102] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0103] Gas appliances such as gas water heaters, wall-hung boilers, and gas stoves typically use fully premixed combustion. Fully premixed combustion refers to the process in which air and gas are premixed in a certain proportion to form a premixed gas, which is then ignited and burned in the burner.

[0104] The premixer is a crucial component of a fully premixed gas appliance. It mixes air and gas in a specific ratio to ensure optimal air-fuel ratio during combustion. However, existing premixers are limited in function, cannot adapt to different gas sources, and have poor applicability.

[0105] Based on this, the present invention proposes a premixer and a gas appliance including the premixer. The premixer has good applicability and can be used for switching between different gas sources. The premixer can be applied to gas appliances such as gas water heaters, wall-hung boilers, and gas stoves. The gas appliance may also include a burner and a fan. After air and gas are mixed into a premixed gas in the premixer, the premixed air enters the burner under the action of the fan and flows out of the burner through the burner's flame holes to achieve ignition and combustion. The structure of the premixer of this application will be described below by way of embodiments.

[0106] In the attached diagram, the thick solid arrows indicate the direction of air flow; the thick dashed arrows indicate the direction of gas flow; and the thick double-dotted arrows indicate the direction of flow of the air-gas mixture.

[0107] Please see Figures 1 to 8 In one embodiment of the present invention, the premixer 10 includes a premixer body 100, a gas distributor 200, an adjusting shaft 300, and a gas adjusting component 400. The premixer body 100 has a gas passage 110. At least a portion of the gas distributor 200 is disposed within the gas passage 110. The gas distributor 200 is provided with a first gas distribution hole 210, a second gas distribution hole 220, and a third gas distribution hole 230, which are respectively connected to the gas passage 110. The first gas distribution hole 210 and the second gas distribution hole 220 are spaced apart, and the patterns formed by the first gas distribution hole 210 and the second gas distribution hole 220 are not congruent. At least a portion of the adjusting shaft 300 is rotatably disposed within the gas passage 110. The gas adjusting component 400... The gas regulating component 400 is mounted on the regulating shaft 300 and located within the gas passage 110. The gas regulating component 400 can rotate synchronously with the regulating shaft 300. When the gas regulating component 400 rotates within a first angle range, the second gas distribution hole 220 is blocked and the third gas distribution hole 230 is fully opened. The gas regulating component 400 adjusts the air passage area of ​​the first gas distribution hole 210 by rotating, thereby adjusting the amount of gas flowing through the first gas distribution hole 210. When the gas regulating component 400 rotates within a second angle range, the first gas distribution hole 210 is blocked and the third gas distribution hole 230 is fully opened. The gas regulating component 400 adjusts the air passage area of ​​the second gas distribution hole 220 by rotating, thereby adjusting the amount of gas flowing through the second gas distribution hole 220.

[0108] It is understood that the gas passage 110 is used to supply gas flow, and the type of gas is not limited, such as but not limited to: natural gas, liquefied petroleum gas, biogas, syngas, etc. The size and location of the gas passage 110 are not limited, and are set according to specific needs.

[0109] The shape of the gas distributor 200 is not limited and can be plate-shaped, cylindrical, or other shapes. The gas distributor 200 can be fixed within the gas channel 110 and integrally formed with the inner wall of the channel, or the gas distributor 200 can be detachably disposed within the gas channel 110. In one embodiment, the premixer body 100 includes a base 140 having a gas channel 110. The gas distributor 200 can be detachably disposed from the base 140, or the gas distributor 200 can be integrally formed with the base 140.

[0110] The gas distribution component 200 is provided with a first gas distribution hole 210 and a second gas distribution hole 220, which can be arranged alternately. The first gas distribution hole 210 and the second gas distribution hole 220 are used to supply two different types of gas. For ease of explanation later, one of the two different gases will be referred to as the first gas, and the other as the second gas. The types of the first and second gases are not limited, for example, but not limited to: the first gas distribution hole 210 for natural gas and the second gas distribution hole 220 for liquefied petroleum gas; or, the first gas distribution hole 210 for liquefied petroleum gas and the second gas distribution hole 220 for natural gas. The specific arrangement can be determined according to needs.

[0111] The first gas distribution hole 210 and the second gas distribution hole 220 are used to distribute the gas flowing into the gas passage 110. The number of first gas distribution holes 210 can be one or more, and this is not specifically limited. When there are multiple first gas distribution holes 210, their area is not limited; for example, any two first gas distribution holes 210 may have the same area, or at least two first gas distribution holes 210 may have different areas. Similarly, the number of second gas distribution holes 220 can be one or more. When there are multiple second gas distribution holes 220, their area is not limited; for example, any two second gas distribution holes 220 may have the same area, or at least two second gas distribution holes 220 may have different areas.

[0112] The shape and size of the first gas distribution hole 210 and the second gas distribution hole 220 are not limited, only that the pattern formed by the first gas distribution hole 210 and the pattern formed by the second gas distribution hole 220 are not congruent, that is, the pattern formed by the first gas distribution hole 210 and the second gas distribution hole 220 cannot completely overlap; and by rotating the gas regulator 400 within a first angular range to adjust the amount of gas flowing through the first gas distribution hole 210, and rotating the gas regulator 400 within a second angular range to adjust the amount of gas flowing through the second gas distribution hole 220, the switching between two different gases can be achieved, so that the change curve of the gas regulator 400 adjusting the gas passage area of ​​the first gas distribution hole 210 is not exactly the same as the change curve of the gas passage area of ​​the second gas distribution hole 220, in order to adapt to different gases.

[0113] The regulating shaft 300 can be driven by the regulator 160. The regulator 160 drives the regulating shaft 300 to rotate, thereby causing the gas regulating component 400 to rotate synchronously. The regulator 160 can be a motor.

[0114] It should be noted that when the gas regulator 400 rotates within the first angle range and the second angle range, the first gas distribution hole 210 can be blocked, or the first gas distribution hole 210 can be fully or partially opened; the second gas distribution hole 220 can be blocked, or the second gas distribution hole 220 can be fully or partially opened; and the third gas distribution hole 230 is fully opened.

[0115] The gas regulator 400 rotates to either block or open the first gas distribution hole 210, and to block or open the second gas distribution hole 220. The third gas distribution hole 230 can be fully opened either by the gas regulator 400 opening it, or by the third gas distribution hole 230 remaining open so that rotation of the gas regulator 400 does not affect the flow of gas through it.

[0116] In this application, the gas regulator 400 obstructs, blocks, or covers the first gas distribution hole 210, meaning that the gas regulator 400 hinders, blocks, or covers the first gas distribution hole 210 to prevent gas from passing through it as much as possible. The gas regulator 400 may fit against the wall of the gas distributor 200 at the first gas distribution hole 210; or, there may be a small gap between the gas regulator 400 and the wall of the gas distributor 200 at the first gas distribution hole 210 to allow a small amount of gas to pass through due to assembly and manufacturing errors of the parts. The amount of gas passing through this gap will not affect the use of the premixer 10. That is, the meaning of "obstruction" in this application is different from the meaning of "sealing." Similarly, in this application, the gas regulator 400 obstructs, blocks, or covers the second gas distribution hole 220, meaning that the gas regulator 400 hinders, blocks, or covers the second gas distribution hole 220 to prevent gas from passing through it as much as possible.

[0117] When the gas regulator 400 opens the first gas distribution hole 210, it means that the blocked first gas distribution hole 210 is opened or cleared, allowing gas to flow through the first gas distribution hole 210. Similarly, when the gas regulator 400 opens the second gas distribution hole 220, it means that the blocked second gas distribution hole 220 is opened or cleared, allowing gas to flow through the second gas distribution hole 220.

[0118] When the gas regulator 400 rotates within the first and second angle ranges, the third gas distribution hole 230 is fully opened, indicating that within the first and second angle ranges, the third gas distribution hole 230 is in a normally open state. At this time, regardless of the type of gas, it can pass through the third gas distribution hole 230. In other words, the third gas distribution hole 230 is a shared hole for both the first and second gas distribution holes 210 and 220. That is, the first gas distribution hole 210 is suitable for supplying the first type of gas, the second gas distribution hole 220 is suitable for supplying the second type of gas, and the third gas distribution hole 230 is suitable for supplying both types of gas.

[0119] The shape and size of the third gas distribution hole 230 are not limited. The area of ​​the third gas distribution hole 230 can be equal to the minimum gas passage area required when the second gas is under minimum load. That is, the third gas distribution hole 230 can meet the gas quantity required for the second gas to be mixed by the premixer 10 under minimum load.

[0120] The specific structure and shape of the gas regulator 400 are not limited. It can be in the form of a block or a plate, etc. It is only necessary that the gas regulator 400 can adjust the gas passage area of ​​the first gas distribution hole 210 and the second gas distribution hole 220, that is, it can adjust the gas intake of the first gas distribution hole 210 and the gas intake of the second gas distribution hole 220.

[0121] In one embodiment, the number of gas regulators 400 can be one, which can be used to regulate the amount of gas flowing through the first gas distribution hole 210 or the amount of gas flowing through the second gas distribution hole 220.

[0122] In another embodiment, the gas regulator 400 includes at least two regulating parts, which regulate the amount of gas flowing through the first gas distribution hole 210 or the amount of gas flowing through the second gas distribution hole 220.

[0123] The specific numerical ranges of the first and second angle ranges are not limited. The first and second angle ranges may partially overlap, or they may not overlap at all. For example, but not limited to: the first angle range may be 0 to 45 degrees, or 0 to 60 degrees, or 0 to 90 degrees, or 0 to 180 degrees, or 0 to 270 degrees, etc.; the second angle range may be 60 to 180 degrees, or 90 to 180 degrees, or 90 to 270 degrees, or 90 to 360 degrees, or 180 to 270 degrees, or 180 to 360 degrees, or 270 to 360 degrees, etc.

[0124] When the gas regulator 400 rotates within the first angle range, it indicates that the premixer 10 is suitable for mixing the first gas. The first gas can pass through the third gas distribution hole 230. As the gas regulator 400 fully or partially opens the first gas distribution hole 210, the first gas can pass through the first gas distribution hole 210. However, because the second gas distribution hole 220 is blocked, the first gas cannot pass through the second gas distribution hole 220. With this setting, the amount of the first gas flowing into the gas passage 110 can be adjusted to ensure that a portion of the first gas can always pass through the gas passage 110 for mixing. In conjunction with the gas regulator 400 partially opening the first gas distribution hole 210, the minimum load gas quantity requirement of the first gas can be met.

[0125] When the gas regulator 400 rotates within the second angle range, it indicates that the premixer 10 is suitable for mixing the second gas. The second gas can pass through the third gas distribution hole 230. As the gas regulator 400 fully or partially opens the second gas distribution hole 220, the second gas can pass through the second gas distribution hole 220. However, because the first gas distribution hole 210 is blocked, the second gas cannot pass through the first gas distribution hole 210. With this configuration, the amount of second gas flowing into the gas passage 110 can be adjusted to ensure that a portion of the second gas can always pass through the gas passage 110 for mixing, thus meeting the minimum load requirement of the second gas.

[0126] In the technical solution of the present invention, the premixer 10 includes a premixer body 100, a gas distribution component 200, an adjusting shaft 300, and a gas adjusting component 400. The gas distribution component 200 is provided with a first gas distribution hole 210, a second gas distribution hole 220, and a third gas distribution hole 230 respectively communicating with the gas channel 110. The first gas distribution hole 210 and the second gas distribution hole 220 are spaced apart, and the pattern formed by the first gas distribution hole 210 and the pattern formed by the second gas distribution hole 220 are not congruent, such that the first gas distribution hole 210 and the second gas distribution hole 220 are not congruent. The patterns formed by the orifices 220 cannot be completely overlapped. The first gas distribution orifice 210 and the second gas distribution orifice 220 can supply two different gases. For example, the first gas distribution orifice 210 is used to supply the first gas, and the second gas distribution orifice 220 is used to supply the second gas. When the gas regulator 400 rotates within the first angle range, the premixer 10 is suitable for mixing the first gas. When the gas regulator 400 rotates within the second angle range, the premixer 10 is suitable for mixing the second gas. In this way, the switching between the two different gases can be achieved.

[0127] When the gas regulator 400 rotates within the first angular range and the second angular range, the third gas distribution hole 230 is fully opened. At this time, both the first and second gases can pass through the third gas distribution hole 230. The third gas distribution hole 230 is equivalent to a shared air passage for the first and second gas distribution holes 210 and 220. The area of ​​the third gas distribution hole 230 is equal to the minimum air passage area required when the second gas is at its minimum load. This allows the second gas to flow only along the third gas distribution hole 230 when the premixer 10 mixes the second gas, thus meeting the minimum load gas requirement. The second gas does not need to pass through the first and second gas distribution holes 210 and 220. This facilitates control of the gas regulator 400 and ensures that the third gas is distributed correctly when the second gas is at its minimum load. The orifice 230 can provide an accurate gas quantity, thereby improving the reliability of the premixer 10. Furthermore, the patterns formed by the first gas distribution orifice 210 and the second gas distribution orifice 220 cannot be completely overlapped. By adjusting the gas quantity flowing through the first gas distribution orifice 210 or the second gas distribution orifice 220 through the gas regulator 400, not only can the switching between two different gases be achieved, but also the curves of the change in the gas flow area of ​​the first gas distribution orifice 210 and the second gas distribution orifice 220 are not exactly the same, in order to adapt to the needs of different gas loads. This increases the flexibility of the gas regulator 400, enabling the premixer 10 of this application to be used for switching between different gases to meet the needs of different gas source regions. The premixer 10 of this application has good applicability and can be widely used.

[0128] The relative positions of the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230 are not limited. In one embodiment, the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230 are spaced apart along the axial direction of the gas regulator 400; and / or, the third gas distribution hole 230 is spaced apart from the first gas distribution hole 210 and the second gas distribution hole 220 and is located between the first gas distribution hole 210 and the second gas distribution hole 220. This arrangement allows the gas regulator 400 to open or block the first gas distribution hole 210 and the second gas distribution hole 220.

[0129] In one embodiment, the first angle range and the second angle range do not overlap. For example, the first angle range is 0 degrees to 90 degrees, and the second angle range is 180 degrees to 270 degrees; or, the first angle range is 90 degrees to 180 degrees, and the second angle range is 270 degrees to 360 degrees, etc., and the specific range is not limited here.

[0130] In one embodiment, a first gas distribution orifice 210 is used to supply first gas, a second gas distribution orifice 220 is used to supply second gas, the minimum air passage area required for the first gas to be under minimum load is S1, the minimum air passage area required for the second gas to be under minimum load is S2, S1 is greater than S2, and the area of ​​the third gas distribution orifice 230 is S2. This configuration ensures that the area of ​​the third gas distribution orifice 230 is equal to the minimum air passage area required for the second gas to be under minimum load, meaning that the third gas distribution orifice 230 can meet the gas quantity requirement for the second gas to be mixed by the premixer 10 under minimum load.

[0131] In one embodiment, the gas distribution component 200 is further provided with a fourth gas distribution hole 240 communicating with the gas passage 110. The fourth gas distribution hole 240 is spaced apart from the third gas distribution hole 230, and the area of ​​the fourth gas distribution hole 240 is the difference between S1 and S2. When the gas regulating component 400 rotates within a first angle range, the fourth gas distribution hole 240 is fully opened. When the gas regulating component 400 rotates within a second angle range, the fourth gas distribution hole 240 is blocked.

[0132] It is understood that the shape and specific location of the fourth gas distribution hole 240 are not limited. When the gas regulator 400 rotates within the first angle range, the third gas distribution hole 230 and the fourth gas distribution hole 240 are fully opened. The area of ​​the third gas distribution hole 230 is S2, and the area of ​​the fourth gas distribution hole 240 is the difference between S1 and S2, that is, the sum of the areas of the third gas distribution hole 230 and the fourth gas distribution hole 240 is S1. In other words, when the gas regulator 400 rotates within the first angle range, the minimum air passage area of ​​the first gas through the gas distributor 200 is equal to the minimum air passage area required when the first gas is under minimum load. This ensures that when the gas regulator 400 rotates within the first angle range, the gas distributor 200 can meet the gas quantity requirement for mixing the first gas through the premixer 10 under minimum load.

[0133] When the gas regulator 400 rotates within the second angle range, the fourth gas distribution hole 240 is blocked. At this time, the second gas can be mixed through the third gas distribution hole 230. The minimum air passage area of ​​the second gas through the gas distributor 200 is the area of ​​the third gas distribution hole 230. The area of ​​the third gas distribution hole 230 is equal to the minimum air passage area required when the second gas is in the minimum load state. In this way, when the gas regulator 400 rotates within the second angle range, the gas distributor 200 can meet the gas quantity required for the second gas to be mixed through the premixer 10 in the minimum load state.

[0134] Therefore, when the gas regulator 400 rotates within the first angle range, the area of ​​the third gas distribution hole 230 and the area of ​​the fourth gas distribution hole 240 can meet the gas quantity requirements of the first gas for mixing through the premixer 10 under minimum load conditions. At this time, the first gas does not need to flow through the first gas distribution hole 210 and the second gas distribution hole 220, which facilitates the control of the gas regulator 400 and ensures that the third gas distribution hole 230 and the fourth gas distribution hole 240 can provide accurate gas quantity under minimum load conditions, thereby improving the reliability of the premixer 10.

[0135] Similarly, when the gas regulator 400 rotates within the second angle range, the area of ​​the third gas distribution hole 230 can meet the gas quantity required for the second gas to be mixed by the premixer 10 under minimum load conditions. At this time, the second gas does not need to flow through the first gas distribution hole 210 and the second gas distribution hole 220, which facilitates the control of the gas regulator 400 and ensures that the third gas distribution hole 230 can provide an accurate gas quantity under minimum load conditions, thereby improving the reliability of the premixer 10.

[0136] Please see Figure 9 and Figure 10 In one embodiment, the maximum air passage area of ​​the first gas distribution hole 210 is greater than the maximum air passage area of ​​the second gas distribution hole 220. The fourth gas distribution hole 240 is disposed close to the first gas distribution hole 210, and the fourth gas distribution hole 240 is connected to or spaced apart from the first gas distribution hole 210. This arrangement, since both the first gas distribution hole 210 and the fourth gas distribution hole 240 are used to supply the first gas, allows the gas regulator 400 to simultaneously open both the first gas distribution hole 210 and the fourth gas distribution hole 240 when the premixer 10 mixes the first gas, thus improving structural compactness.

[0137] In one embodiment, the number of first gas distribution holes 210 is one or more; the number of second gas distribution holes 220 is one or more; and the number of third gas distribution holes 230 is one or more. That is, the number of first gas distribution holes 210, second gas distribution holes 220, and third gas distribution holes 230 is not limited and can be set as needed.

[0138] In one embodiment, there are multiple first gas distribution holes 210, where any two first gas distribution holes 210 have the same area, or at least two first gas distribution holes 210 have different areas; there are multiple second gas distribution holes 220, where any two second gas distribution holes 220 have the same area, or at least two second gas distribution holes 220 have different areas; and there are multiple third gas distribution holes 230, where any two third gas distribution holes 230 have the same area, or at least two third gas distribution holes 230 have different areas. This arrangement means that the areas of the multiple first gas distribution holes 210 can be at least partially the same or at least partially different; the areas of the multiple second gas distribution holes 220 can be at least partially the same or at least partially different; and the areas of the multiple third gas distribution holes 230 can be at least partially the same or at least partially different, and the specific details are not limited here.

[0139] In one embodiment, the number of fourth gas distribution holes 240 is one or more. That is, the number of fourth gas distribution holes 240 is not limited and can be set as needed.

[0140] In one embodiment, there are multiple fourth gas distribution holes 240, and any two fourth gas distribution holes 240 have the same area, or at least two fourth gas distribution holes 240 have different areas. This arrangement means that the areas of the multiple fourth gas distribution holes 240 can be at least partially the same or at least partially different, and the specific details are not limited here.

[0141] Please see Figures 3 to 5 In one embodiment, the gas distribution component 200 has a gas distribution cavity 250 and a gas inlet 260, a first gas distribution hole 210, a second gas distribution hole 220 and a third gas distribution hole 230 respectively connected to the gas distribution cavity 250. The gas regulating component 400 is rotatably disposed in the gas distribution cavity 250, and the gas inlet 260 is used to communicate with an external gas source.

[0142] It is understood that the specific shape of the gas distribution chamber 250 is not limited here, as long as the gas regulator 400 can be adapted to the gas distribution chamber 250. External gas can flow into the gas distribution chamber 250 through the gas inlet 260. The premixer body 100 also has an air passage 120 and a mixing passage 130 connecting the gas passage 110 and the air passage 120. The mixing passage 130 is used to premix the air and gas flowing into it.

[0143] When the gas regulator 400 opens the first gas distribution hole 210 or the second gas distribution hole 220, external gas can flow into the gas distribution chamber 250 from the gas inlet hole 260, and then flow into the mixing channel 130 after passing through the first gas distribution hole 210 or the second gas distribution hole 220. Conversely, when the gas regulator 400 blocks the second gas distribution hole 220 or the first gas distribution hole 210, the gas regulator 400 is either in close contact with the inner wall of the gas distribution chamber 250 or has a small gap, thus preventing the gas in the gas distribution chamber 250 from flowing out of the second gas distribution hole 220 or the first gas distribution hole 210. It should be noted that when there is a small gap between the gas regulator 400 and the inner wall of the gas distribution chamber 250 at the first gas distribution hole 210 or the second gas distribution hole 220, this small gap is to allow the gas regulator 400 to rotate within the gas distribution chamber 250 and to accommodate assembly and manufacturing errors. The amount of gas flowing out through this small gap is minimal or negligible.

[0144] This solution involves configuring a gas distribution chamber 250, a gas inlet 260, a first gas distribution hole 210, a second gas distribution hole 220, and a third gas distribution hole 230 on the gas distribution component 200. The gas regulating component 400 rotates within the gas distribution chamber 250, allowing it to fully or partially open one of the first gas distribution hole 210 and the second gas distribution hole 220, while completely blocking the other. This adjusts the air passage area of ​​either the open first gas distribution hole 210 or the second gas distribution hole 220, thereby regulating the intake volume of the first or second gas. This solution offers a simple and easy-to-implement adjustment method, simplifying the structure of the premixer 10.

[0145] In one embodiment, the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230 are circumferentially spaced on the side wall of the gas distribution member 200 around the adjusting shaft 300. This arrangement facilitates the gas regulating member 400 in opening or blocking the first gas distribution hole 210 and the second gas distribution hole 220. The number of gas regulating members 400 can be one or more. Even with only one gas regulating member 400 in the premixer 10, switching between two different types of gas can be achieved to meet the needs of different gas source regions. The premixer 10 of this application has good applicability and can be widely used.

[0146] In one embodiment, the number of gas regulators 400 is one, which helps to simplify the structure of the premixer 10.

[0147] In one embodiment, the gas regulator 400 includes a fan-shaped baffle or a fan-shaped baffle block. By providing a fan-shaped baffle or baffle block, the component structure is simplified and the manufacturing difficulty is reduced.

[0148] In one embodiment, the adjusting shaft 300 is located outside the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230. That is, the adjusting shaft 300 will not obstruct the gas flowing through the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230, so that the gas can flow smoothly into the mixing channel 130 of the premixer body 100 through the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230.

[0149] In one embodiment, the gas regulator 400 includes a first gas regulator 410 and a second gas regulator 420 disposed on an regulating shaft 300. The first gas regulator 410 and the second gas regulator 420 can rotate synchronously with the regulating shaft 300 within the gas distribution chamber 250. When the regulating shaft 300 rotates within a first angle range, the first gas regulator 410 fully or partially opens the first gas distribution hole 210, the second gas regulator 420 blocks the second gas distribution hole 220, and the third gas distribution hole 230 is fully opened. When the regulating shaft 300 rotates within a second angle range, the first gas regulator 410 blocks the first gas distribution hole 210, the third gas distribution hole 230 is fully opened, and the second gas regulator 420 adjusts the gas passage area of ​​the second gas distribution hole 220 by rotation.

[0150] The shape and size of the first gas regulating section 410 and the second gas regulating section 420 are not limited. The first gas regulating section 410 adjusts the air passage area of ​​the first gas distribution hole 210, and the second gas regulating section 420 adjusts the air passage area of ​​the second gas distribution hole 220. The first gas regulating section 410 and the second gas regulating section 420 rotate synchronously with the regulating shaft 300. In this way, the rotation of one regulating shaft 300 drives the first gas regulating section 410 and the second gas regulating section 420 to rotate synchronously, so as to provide for the switching of two different gases. The method of switching between different gases is simple, which helps to simplify the structure of the premixer 10 and improves the applicability of the premixer 10.

[0151] Please see Figures 3 to 10In one embodiment, the gas regulator 400 includes a first gas regulator 410 and a second gas regulator 420. Both the first gas regulator 410 and the second gas regulator 420 are mounted on an adjusting shaft 300 and can rotate synchronously with the adjusting shaft 300. When the adjusting shaft 300 rotates within a first angle range, the first gas regulator 410 adjusts the gas passage area of ​​the first gas distribution hole 210 by rotating, the second gas regulator 420 blocks the second gas distribution hole 220, the third gas distribution hole 230 is fully opened, and the first gas regulator 410 fully opens the fourth gas distribution hole 240. When the adjusting shaft 300 rotates within a second angle range, the first gas regulator 410 blocks the first gas distribution hole 210 and the fourth gas distribution hole 240, the third gas distribution hole 230 is fully opened, and the second gas regulator 420 adjusts the gas passage area of ​​the second gas distribution hole 220 by rotating.

[0152] It is understood that the shape and size of the first gas regulating part 410 and the second gas regulating part 420 are not limited. The first gas regulating part 410 adjusts the air passage area of ​​the first gas distribution hole 210 and opens or blocks the fourth gas distribution hole 240. The second gas regulating part 420 adjusts the air passage area of ​​the second gas distribution hole 220. The first gas regulating part 410 and the second gas regulating part 420 rotate synchronously with the regulating shaft 300. In this way, the rotation of the regulating shaft 300 drives the first gas regulating part 410 and the second gas regulating part 420 to rotate synchronously for switching between two different gases. The method of switching between different gases is simple, which helps to simplify the structure of the premixer 10 and improves the applicability of the premixer 10.

[0153] In one embodiment, the first gas regulating part 410 and the second gas regulating part 420 are arranged along the axial direction of the regulating shaft 300; along the gas outlet direction of the gas passage 110, the first gas regulating part 410 is located upstream of the first gas distribution hole 210, and the second gas regulating part 420 is located upstream of the second gas distribution hole 220.

[0154] This configuration ensures that the first gas regulating unit 410 and the second gas regulating unit 420 do not affect each other when they rotate with the regulating shaft 300. Furthermore, the first gas regulating unit 410 will not affect the gas flowing out from the outlet end of the first gas distribution hole 210, and the second gas regulating unit 420 will not affect the gas flowing out from the outlet end of the second gas distribution hole 220. This is beneficial to improving the smoothness of the gas flowing out from the outlet end of either the first gas distribution hole 210 or the outlet end of the second gas distribution hole 220.

[0155] Please see Figures 3 to 10In one embodiment, the gas distribution component 200 has a gas distribution cavity 250 and a gas inlet 260, a first gas distribution hole 210, a second gas distribution hole 220, a third gas distribution hole 230 and a fourth gas distribution hole 240 respectively connected to the gas distribution cavity 250. The gas inlet 260 is used to communicate with an external gas source. The first gas regulating part 410 and the second gas regulating part 420 are rotatably disposed in the gas distribution cavity 250.

[0156] The specific shape of the gas distribution chamber 250 is not limited here, as long as the gas regulator 400 can be adapted to the gas distribution chamber 250. External gas can flow into the gas distribution chamber 250 through the gas inlet 260. The first gas regulator 410 and the second gas regulator 420 rotate synchronously with the regulator 300 in the gas distribution chamber 250 to adjust the air passage area of ​​the first gas distribution hole 210 or the air passage area of ​​the second gas distribution hole 220, and to open or block the fourth gas distribution hole 240. This solution is simple and easy to implement for switching between different gas types, which helps to simplify the structure of the premixer 10.

[0157] In one embodiment, the first gas regulating part 410 and the second gas regulating part 420 are spaced apart along the axial direction of the regulating shaft 300, and the third gas distributing hole 230 is located between the first gas regulating part 410 and the second gas regulating part 420, as projected along the axial direction of the third gas distributing hole 230.

[0158] It is understandable that the first gas regulating part 410 is correspondingly arranged with the first gas distribution hole 210, and the second gas regulating part 420 is correspondingly arranged with the second gas distribution hole 220. The projection along the axial direction of the third gas distribution hole 230 shows that the third gas distribution hole 230 is located between the first gas regulating part 410 and the second gas regulating part 420, so that the first gas regulating part 410 and the second gas regulating part 420 in the gas distribution cavity 250 will not block the third gas distribution hole 230. The gas in the gas distribution cavity 250 can always pass smoothly through the third gas distribution hole 230, which helps to improve the smoothness of gas flow.

[0159] Please see Figure 9 and Figure 10 In one embodiment, the first gas distribution hole 210, the second gas distribution hole 220, the third gas distribution hole 230 and the fourth gas distribution hole 240 are all located on the first side of the gas distribution member 200; the gas inlet hole 260 is located on the second side of the gas distribution member 200, and the first side and the second side are arranged adjacent to or opposite to each other.

[0160] It is understandable that the gas inlet 260 is located on different sides of the gas distribution member 200, along with the first gas distribution hole 210, the second gas distribution hole 220, the third gas distribution hole 230, and the fourth gas distribution hole 240. This allows gas to flow in from one side of the gas distribution member 200 and out from the other side, which helps to improve the smoothness of gas flow.

[0161] In one embodiment, the number of gas inlet ports 260 is one or more. That is, the number of gas inlet ports 260 is not limited and can be set as needed.

[0162] In one embodiment, the first gas regulating part 410 and the second gas regulating part 420 are spaced apart along the axial direction of the regulating shaft 300, and at least a portion of the gas inlet hole 260 is located between the first gas regulating part 410 and the second gas regulating part 420, as projected along the axial direction of the gas inlet hole 260.

[0163] It is understood that the first gas regulating part 410 is arranged opposite to the first gas distribution hole 210, and the second gas regulating part 420 is arranged opposite to the second gas distribution hole 220. According to the axial projection of the gas inlet hole 260, at least part of the gas inlet hole 260 is located between the first gas regulating part 410 and the second gas regulating part 420, so that the gas flowing into the gas distribution chamber 250 from the gas inlet hole 260 can flow in opposite directions. As the first gas regulating part 410 and the second gas regulating part 420 rotate, the gas selectively flows through the first gas distribution hole 210 or the second gas distribution hole 220. This helps to shorten the sum of the flow paths of the gas from the gas inlet hole 260 into the first gas distribution hole 210 and the second gas distribution hole 220. In other words, the gas inlet hole 260, the first gas distribution hole 210 and the second gas distribution hole 220 are arranged compactly on the gas distribution member 200, which helps to shorten the flow path of the airflow in the gas distribution chamber 250 and increase the gas flow speed.

[0164] In one embodiment, along the axial direction of the adjusting shaft 300, the gas inlet 260 is offset from the first gas regulating part 410 and the second gas regulating part 420. This arrangement ensures that the first gas regulating part 410 and the second gas regulating part 420 do not obstruct the gas inlet 260, and that gas can flow into the gas distribution chamber 250 from the gas inlet 260 regardless of whether the first gas regulating part 410 and the second gas regulating part 420 are rotating, thereby facilitating the smooth flow of gas into the gas distribution chamber 250.

[0165] Please see Figures 6 to 16In one embodiment, the first gas regulating part 410 and the regulating shaft 300 form a first gas supply groove 430, or the first gas regulating part 410 is provided with a first gas supply groove 430; the second gas regulating part 420 and the regulating shaft 300 form a second gas supply groove 440, or the second gas regulating part 420 is provided with a second gas supply groove 440; when the first gas regulating part 410 and the second gas regulating part 420 rotate within a first angle range, a portion of the groove opening of the first gas supply groove 430 is disposed facing the first gas distribution hole 210 or facing outward from the first gas distribution hole 210, and a portion of the groove opening of the first gas supply groove 430 is disposed facing the fourth gas distribution hole 210. 40 is configured such that the opening of the second gas supply groove 440 faces outward from the second gas distribution hole 220, and the outer peripheral wall of the second gas regulating part 420 blocks the second gas distribution hole 220; when the first gas regulating part 410 and the second gas regulating part 420 rotate within the second angle range, the opening of the first gas supply groove 430 faces outward from the first gas distribution hole 210 and the fourth gas distribution hole 240, and the outer peripheral wall of the first gas regulating part 410 blocks the first gas distribution hole 210 and the fourth gas distribution hole 240; the opening of the second gas supply groove 440 is configured either facing outward from the second gas distribution hole 220 or facing outward from the second gas distribution hole 220.

[0166] It is understandable that the specific numerical ranges of the first and second angle ranges are not limited, and the first and second angle ranges may partially overlap, or they may not overlap at all.

[0167] The minimum air passage area required when the first gas is under minimum load is S1. For the first gas regulating unit 410 and the second gas regulating unit 420, 0 degrees can represent the first gas regulating unit 410 and the second gas regulating unit 420 in a preset initial position. This preset initial position can be the position where the first gas regulating unit 410 blocks the first gas distribution hole 210 and fully opens the fourth gas distribution hole 240; and the position where the second gas regulating unit 420 blocks the second gas distribution hole 220. At this time, the third gas distribution hole 230 is normally open, and the sum of the air passage areas of the third gas distribution hole 230 and the fourth gas distribution hole 240 is S1, which is equal to the minimum air passage area required when the first gas is under minimum load. The specific shape and position of the opening of the first gas supply groove 430 are not limited.

[0168] Specifically in this embodiment, the first angle range is 0 degrees to 90 degrees, at which time the third gas distribution hole 230 is in the normally open state.

[0169] When the first gas regulating unit 410 and the second gas regulating unit 420 are at the 0-degree position, a portion of the opening of the first gas supply groove 430 is set towards the outside of the first gas distribution hole 210, and a portion of the opening of the first gas supply groove 430 is set towards the fourth gas distribution hole 240; the opening of the second gas supply groove 440 is set towards the outside of the second gas distribution hole 220, so that the sum of the air passage area of ​​the third gas distribution hole 230 and the air passage area of ​​the fourth gas distribution hole 240 is equal to the minimum air passage area S1 required when the first gas is in the minimum load state. At this time, it is the minimum amount of the first gas mixed by the premixer 10.

[0170] When the first gas regulating unit 410 and the second gas regulating unit 420 are at a 90-degree position, a portion of the opening of the first gas supply groove 430 faces the first gas distribution hole 210, and a portion of the opening of the first gas supply groove 430 faces the fourth gas distribution hole 240; the opening of the second gas supply groove 440 faces outward from the second gas distribution hole 220, so that the first gas regulating unit 410 adjusts the gas passage area of ​​the first gas distribution hole 210 to the maximum, the first gas regulating unit 410 fully opens the first gas distribution hole 210, and the third gas distribution hole 230 is in the normally open state, and the fourth gas distribution hole 240 is fully opened. At this time, the premixer 10 mixes the maximum amount of first gas.

[0171] When the first gas regulating section 410 and the second gas regulating section 420 are in a position between 0 degrees and 90 degrees, the amount of the first gas mixed by the premixer 10 is between the minimum and the maximum.

[0172] In this embodiment, the first angle range and the second angle range do not overlap.

[0173] The minimum gas passage area required when the second gas is under minimum load is S2. For the first gas regulating unit 410 and the second gas regulating unit 420, 180 degrees can represent a 180-degree rotation from the aforementioned 0-degree angle range, i.e., a 180-degree rotation from the preset initial position. The area of ​​the third gas distribution hole 230 is S2, which is the position that ensures both the first gas distribution hole 210 and the second gas distribution hole 220 are blocked. The specific shape and position of the opening of the second gas supply groove 440 are not limited.

[0174] Specifically in this embodiment, the second angle range is 180 degrees to 270 degrees, at which time the third gas distribution hole 230 is in the normally open state.

[0175] like Figures 3 to 5As shown, when the first gas regulating unit 410 and the second gas regulating unit 420 are at a 180-degree position, the opening of the first gas supply slot 430 is set towards the outside of the first gas distribution hole 210 and the outside of the fourth gas distribution hole 240; the opening of the second gas supply slot 440 is set towards the outside of the second gas distribution hole 220, so that the air passage area of ​​the third gas distribution hole 230 is equal to the minimum air passage area S2 required when the second gas is in the minimum load state, which is the minimum amount of the second gas mixed by the premixer 10.

[0176] like Figures 6 to 8 As shown, when the first gas regulating unit 410 and the second gas regulating unit 420 are at a position of 270 degrees, the opening of the first gas supply groove 430 is set towards the outside of the first gas distribution hole 210 and the outside of the fourth gas distribution hole 240; the opening of the second gas supply groove 440 is set towards the second gas distribution hole 220, so that the second gas regulating unit 420 adjusts the gas passage area of ​​the second gas distribution hole 220 to the maximum, the second gas regulating unit 420 fully opens the second gas distribution hole 220, and cooperates with the third gas distribution hole 230 to be in the normally open state. At this time, the premixer 10 mixes the maximum amount of the second gas.

[0177] When the first gas regulating section 410 and the second gas regulating section 420 are positioned between 180 degrees and 270 degrees, the amount of the second gas mixed by the premixer 10 is between the minimum and the maximum.

[0178] Please see Figures 10 to 16 In one embodiment, a first gas regulating part 410 is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft 300 and surrounds the remaining outer peripheral wall of the regulating shaft 300 to form a first gas supply groove 430. The first gas supply groove 430 has a first groove 431 and a second groove 432. The first groove 431 is opened along the axial direction of the regulating shaft 300 toward the second gas regulating part 420 and communicates with the gas inlet hole 260. The second groove 432 is opened radially outward along the regulating shaft 300. The second groove 432 is configured to selectively face the first gas distribution hole 210 and / or the fourth gas distribution hole 240 as the first gas regulating part 410 rotates.

[0179] It is understandable that the shape and size of the first slot 431 and the second slot 432 are not limited, and can be set according to the structure of the first gas regulating unit 410 and the needs. Figure 14 The dashed box on the left side of the image represents the second slot, 432. Figure 14The dashed box on the right side of the middle represents the first slot 431. The first slot 431 is connected to the gas inlet 260, allowing gas to flow smoothly into the first gas supply slot 430. The second slot 432 is provided on the outer peripheral wall of the first gas regulating part 410. When the first gas regulating part 410 needs to open the first gas distribution hole 210 and / or the fourth gas distribution hole 240, the second slot 432 is rotated to face the first gas distribution hole 210 and / or the fourth gas distribution hole 240. When the first gas regulating part 410 needs to block the first gas distribution hole 210 and / or the fourth gas distribution hole 240, the second slot 432 is rotated to face outward from the first gas distribution hole 210 and / or outward from the fourth gas distribution hole 240, so that the outer peripheral wall of the first gas regulating part 410 blocks the first gas distribution hole 210 and / or the fourth gas distribution hole 240. This makes it simple to adjust the gas passage area of ​​the first gas distribution hole 210 and / or the fourth gas distribution hole 240, which helps to simplify the structure of the premixer 10.

[0180] Please see Figure 14 In one embodiment, the gas regulating component 400 further includes a first gas blocking part 450, which is disposed at one end of the first gas supply groove 430 away from the first slot opening 431 along the axial direction of the regulating shaft 300. The first slot opening 431 is located between the first gas blocking part 450 and the second gas regulating part 420. The first gas blocking part 450 is used to block the end of the first gas supply groove 430 away from the gas inlet 260.

[0181] Understandably, by setting the first gas blocking part 450, not only can the gas flow away from the first slot 431 along the axial direction of the adjusting shaft 300, so that when the first gas needs to be mixed, the first gas flowing into the first gas supply slot 430 can flow smoothly from the second slot 432 toward the first gas distribution hole 210; in addition, the first gas blocking part 450 also enriches the integrity of the first gas adjusting part 410, making the first gas adjusting part 410 more complete in the rotational circumferential direction, which is conducive to reducing shaking and increasing the rotational stability of the first gas adjusting part 410.

[0182] Please see Figures 10 to 16In one embodiment, the second gas regulating part 420 is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft 300 and surrounds the remaining outer peripheral wall of the regulating shaft 300 to form a second gas supply groove 440. The second gas supply groove 440 has a third groove 441 and a fourth groove 442. The third groove 441 is opened along the axial direction of the regulating shaft 300 toward the first gas regulating part 410 and communicates with the gas inlet hole 260. The fourth groove 442 is opened along the radial direction of the regulating shaft 300 toward the direction away from the second groove 432. The fourth groove 442 is configured to selectively face the second gas distribution hole 220 as the second gas regulating part 420 rotates.

[0183] It is understandable that the shape and size of the third slot 441 and the fourth slot 442 are not limited, and can be set according to the structure of the second gas regulating unit 420 and the needs. Figure 16 The dashed box on the left side of the image represents the third slot, 441. Figure 16 The dashed box on the right side of the image represents the fourth slot 442. The third slot 441 is connected to the gas inlet 260, allowing gas to flow smoothly into the second gas supply slot 440. The fourth slot 442 is located on the outer peripheral wall of the second gas regulating section 420. When the second gas regulating section 420 needs to open the second gas distribution hole 220, the fourth slot 442 is rotated to face the second gas distribution hole 220; when the second gas regulating section 420 needs to block the second gas distribution hole 220, the fourth slot 442 is rotated to face outwards from the second gas distribution hole 220, so that the outer peripheral wall of the second gas regulating section 420 blocks the second gas distribution hole 220. This simplifies the method of adjusting the gas passage area of ​​the second gas distribution hole 220 and helps to simplify the structure of the premixer 10.

[0184] In one embodiment, the gas regulator 400 further includes a second gas blocking part 460, which is disposed at one end of the second gas supply groove 440 away from the third slot 441 along the axial direction of the regulating shaft 300. The third slot 441 is located between the second gas blocking part 460 and the first gas regulator 410. The second gas blocking part 460 is used to block the end of the second gas supply groove 440 away from the gas inlet 260.

[0185] It is understandable that by providing the second gas blocking part 460, not only can the gas flow away from the third slot 441 along the axial direction of the adjusting shaft 300, so that when the second gas needs to be mixed, the second gas flowing into the second gas supply slot 440 can flow smoothly from the fourth slot 442 toward the second gas distribution hole 220; furthermore, the second gas blocking part 460 also enhances the integrity of the second gas adjusting part 420, making the second gas adjusting part 420 more complete in the rotational circumferential direction, which helps to reduce shaking and increase the rotational stability of the second gas adjusting part 420.

[0186] In one embodiment, the first gas regulating part 410 is provided with a first gas passage hole located between the regulating shaft 300 and the outer peripheral wall of the first gas regulating part 410, and the first gas passage hole passes through the opposite sides of the first gas regulating part 410 along the circumferential direction of the regulating shaft 300.

[0187] It is understandable that the shape, size, and number of the first vent holes are not limited, as long as the gas can pass through the first gas regulating part 410 along the first vent holes. By providing the first vent holes, it is beneficial to improve the smoothness of the gas flow in the gas distribution chamber 250, that is, to improve the smoothness of the gas flow from the gas distribution chamber 250 through the first gas distribution hole 210.

[0188] In one embodiment, the second gas regulating part 420 is provided with a second gas passage hole located between the regulating shaft 300 and the outer peripheral wall of the second gas regulating part 420, and the second gas passage hole passes through the opposite sides of the second gas regulating part 420 along the circumferential direction of the regulating shaft 300.

[0189] It is understood that the shape, size, and number of the second vent holes are not limited, as long as the gas can pass through the second gas regulating section 420 along the second vent holes. By providing the second vent holes, it is beneficial to improve the smoothness of gas flow in the gas distribution chamber 250, that is, to improve the smoothness of gas flow from the gas distribution chamber 250 through the second gas distribution hole 220.

[0190] Please see Figures 9 to 16 In one embodiment, the cavity walls of the gas distribution chambers 250 at the first gas distribution hole 210 and the second gas distribution hole 220 are both circular in cross-section along the radial direction of the adjustment shaft 300; and / or, the first gas adjustment part 410 has a first arc-shaped outer wall surface adapted to the cavity wall of the gas distribution chamber 250; and the second gas adjustment part 420 has a second arc-shaped outer wall surface adapted to the cavity wall of the gas distribution chamber 250.

[0191] It is understandable that the outline formed by the rotation of the first arc-shaped outer wall is circular, and the outline formed by the rotation of the second arc-shaped outer wall is also circular. The circular outline can be adapted to the inner cavity wall with a circular cross-section, so that the first gas regulating part 410 and the second gas regulating part 420 can rotate stably in the gas distribution cavity 250, thereby improving the adaptability of the first gas regulating part 410 and the second gas regulating part 420 to the gas distribution cavity 250.

[0192] In one embodiment, the first gas regulating part 410 is arranged in a fan shape in the radial section along the regulating shaft 300. This arrangement makes it easy for the first gas regulating part 410 to form a first gas supply groove 430 with the regulating shaft 300. The outer peripheral wall of the first gas regulating part 410 can selectively open or block the first gas distribution hole 210 as the regulating shaft 300 rotates, and the size of the outer peripheral wall of the first gas regulating part 410 is adapted to the size of the first gas distribution hole 210.

[0193] In one embodiment, the second gas regulating section 420 is arranged in a fan shape in the radial section along the regulating shaft 300. This arrangement makes it easy for the second gas regulating section 420 to form a second gas supply groove 440 with the regulating shaft 300. The outer peripheral wall of the second gas regulating section 420 can selectively open or close the second gas distribution hole 220 as the regulating shaft 300 rotates, and the size of the outer peripheral wall of the second gas regulating section 420 is adapted to the size of the second gas distribution hole 220.

[0194] In one embodiment, the gas distribution component 200 is provided with a first mounting hole 270 communicating with the gas distribution cavity 250. A first gas regulating part 410 and a second gas regulating part 420 are installed into the gas distribution cavity 250 through the first mounting hole 270. The opening direction of the first mounting hole 270 faces the axial direction of the regulating shaft 300. This arrangement facilitates the smooth installation of the first gas regulating part 410 and the second gas regulating part 420 into the gas distribution cavity 250, and eliminates the need for position adjustment after installation, thus improving structural compactness. The shape and position of the first mounting hole 270 are not limited, as long as the first gas regulating part 410 and the second gas regulating part 420 can be smoothly installed into the gas distribution cavity 250.

[0195] In one embodiment, the centerline of the first mounting hole 270 coincides with the axis of the adjusting shaft 300. This arrangement means that after the adjusting shaft 300 is installed in the gas distribution chamber 250 along the centerline of the first mounting hole 270, the position of the axis of the adjusting shaft 300 remains unchanged. The gas regulating component 400 is mounted on the adjusting shaft 300, meaning the size of the gas regulating component 400 is adapted to the size of the gas distribution chamber 250, thus ensuring that the position of the axis of the adjusting shaft 300 remains unchanged. This improves the adaptability of the assembled parts.

[0196] Please see Figures 9 to 11In one embodiment, the gas distribution component 200 has a first sidewall 201 and a second sidewall 202 opposite to each other, and a third sidewall 203 and a fourth sidewall 204 located between the first sidewall 201 and the second sidewall 202 and arranged around the rotational circumference of the gas regulating component 400. The third sidewall 203 and the fourth sidewall 204 are arranged adjacent to or opposite to each other. A first mounting hole 270 is provided on the first sidewall 201. A second mounting hole 280 for the regulating shaft 300 to pass through is provided on the second sidewall 202. A gas inlet hole 260 is provided on the third sidewall 203. A first gas distribution hole 210, a second gas distribution hole 220, a third gas distribution hole 230 and a fourth gas distribution hole 240 are all provided on the fourth sidewall 204 and are spaced apart.

[0197] It is understood that the outer surface of the gas distributor 200 can be square, or other shapes, which are not limited here. The first mounting hole 270 and the second mounting hole 280 are on opposite side walls of the gas distributor 200, which facilitates the insertion of the adjusting shaft 300 through the first mounting hole 270 and its exit through the second mounting hole 280, thereby improving installation stability and convenience. The gas inlet hole 260, the first gas distribution hole 210, the second gas distribution hole 220, the third gas distribution hole 230, and the fourth gas distribution hole 240 are located on different side walls of the gas distributor 200, allowing gas to flow in from one side of the gas distributor 200 and exit from the other side, thus improving the smoothness of gas flow.

[0198] In other embodiments, the gas distributor 200 may also be cylindrical. This design simplifies the structure of the gas distributor 200 and makes it easier to manufacture.

[0199] Please see Figures 2 to 5 In one embodiment, the premixer body 100 includes a base 140 and a cover plate 150. The base 140 is provided with a gas passage 110. One side of the base 140 is provided with an installation port communicating with the gas passage 110. The gas distributor 200 is installed in the gas passage 110 through the installation port. The cover plate 150 is detachably covered by the installation port. The premixer body 100 includes an regulator 160. One end of the regulating shaft 300 passes through the cover plate 150 and is drivenly connected to the regulator 160.

[0200] It is understood that the regulator 160 is a motor, which drives the regulating shaft 300 to rotate, thereby causing the gas regulating component 400 to rotate synchronously. The installation port facilitates the installation of the gas distributor 200 within the gas passage 110, and the cover plate 150 can limit the gas distributor 200 to ensure its stability within the gas passage 110. One end of the regulating shaft 300 protrudes outward from the cover plate 150 for easy connection to the motor. Therefore, the premixer 10 of this application has a reasonable structural design, facilitating assembly and disassembly.

[0201] In one embodiment, the premixer 10 further includes a first seal 600 disposed between the seat 140 and the cover plate 150 to seal the gap between the seat 140 and the cover plate 150.

[0202] In one embodiment, the adjusting shaft 300 and the gas regulating component 400 are an integral structure. This configuration, where the adjusting shaft 300 and the gas regulating component 400 are integrated into a single unit, reduces assembly and manufacturing costs and improves the rotational stability of the gas regulating component 400.

[0203] In one embodiment, the premixer body 100 further includes an air passage 120 and a mixing passage 130 connecting the gas passage 110 and the air passage 120. The premixer body 100 also includes an air conditioning element 170, which is rotatably disposed within the air passage 120. The air conditioning element 170 is configured to adjust the air passage area of ​​the air passage 120 by rotation, so as to adjust the amount of air flowing into the mixing passage 130.

[0204] It is understood that the air passage 120 is used to allow air to flow in, and the size and location of the air passage 120 are not limited. The mixing passage 130 is used to premix the air and fuel gas flowing in, and the size and location of the mixing passage 130 are not limited, but are set according to specific needs.

[0205] The shape of the air conditioning component 170 is not limited. The air conditioning component 170 is adapted to the air passage 120. The air conditioning component 170 can be plate-shaped, block-shaped, butterfly-shaped, or other shapes. It is only necessary that the air conditioning component 170 can adjust the air passage area of ​​the air passage 120 by rotating.

[0206] In one embodiment, the air conditioning component 170 may be disposed on the adjustment shaft 300, so that the adjustment shaft 300 can drive the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously.

[0207] In another embodiment, the air conditioning element 170 and the gas conditioning element 400 can be driven by a regulator 160 respectively, with the air conditioning element 170 located outside the regulating shaft 300.

[0208] Please see Figures 2 to 10 In one embodiment, the premixer body 100 further includes an air passage 120 and a mixing passage 130 connecting the gas passage 110 and the air passage 120. The premixer body 100 also includes an air conditioning element 170, which is disposed on the adjustment shaft 300 and located in the air passage 120. The air conditioning element 170 is configured to adjust the air passage area of ​​the air passage 120 as the adjustment shaft 300 rotates, so as to adjust the amount of air flowing into the mixing passage 130. The gas conditioning element 400 is used to adjust the amount of gas flowing into the mixing passage 130.

[0209] Understandably, in this design, both the air conditioning component 170 and the gas conditioning component 400 are mounted on the adjusting shaft 300, which can drive the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously. In other words, one adjusting shaft 300 drives the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously, thus simplifying the method of driving their rotation and simplifying the structure of the premixer 10.

[0210] In one embodiment, the air conditioning component 170 includes an air flap that is disposed on the adjustment shaft 300 and can rotate with the rotation of the adjustment shaft 300.

[0211] The air passage area of ​​air channel 120 affects the amount of air flowing into mixing channel 130, and the gas passage area of ​​gas channel 110 affects the amount of gas flowing into mixing channel 130. The mixing ratio of air and gas flowing into mixing channel 130 is the air-fuel ratio, which affects the combustion efficiency of the gas. In this design, the adjusting shaft 300 can drive the air regulating component 170 and the gas regulating component 400 to rotate synchronously, that is, it can synchronously adjust the air passage area of ​​air channel 120 and the gas passage area of ​​gas channel 110. The air passage area of ​​air channel 120 and the gas passage area of ​​gas channel 110 can increase or decrease synchronously. In other words, the ratio of the air passage area of ​​air channel 120 to the gas passage area of ​​gas channel 110 in this design can always be maintained within a preset range. This preset range of ratio is the air-gas ratio range with good combustion efficiency. The technical solution of this application uses an adjusting shaft 300 to drive the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously. Even if the premixer 10 changes under different loads, the air-fuel ratio of the premixer 10 can still be maintained within a good range, so that the gas has good combustion efficiency. The good range of air-fuel ratio of the premixer 10 in this solution has been calculated and tested during the product design. The assembled premixer 10 has a good range to ensure high combustion efficiency of the gas when applied to gas equipment.

[0212] When the premixer 10 is applied in a gas equipment, the premixed air in the mixing channel 130 can be discharged outward under the action of the fan. When the fan speed is constant, the fan controls the flow speed of air and gas, thereby directly controlling the amount of air and gas flowing into the mixing channel 130; when the fan speed changes, the amount of air and gas flowing into the mixing channel 130 is adjusted accordingly.

[0213] In one embodiment, both the air conditioning element 170 and the gas conditioning element 400 are disposed on the adjustment shaft 300. The air conditioning element 170 is disposed in the air passage 120 and is configured to adjust the air passage area of ​​the air passage 120 as the adjustment shaft 300 rotates, so as to adjust the amount of air flowing into the mixing passage 130. The gas conditioning element 400 is disposed in the gas passage 110 and is configured to adjust the gas passage area of ​​the gas passage 110 as the adjustment shaft 300 rotates, so as to adjust the amount of gas flowing into the mixing passage 130. This configuration allows the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously with the adjustment shaft 300. This enables the simultaneous adjustment of the air passage area of ​​the air channel 120 and the gas passage area of ​​the gas channel 110, allowing both to increase or decrease simultaneously. This ensures that the ratio of air to gas flowing into the mixing channel 130 remains within a preset range under different load conditions, thus maintaining an optimal air-fuel ratio for the premixer 10 under varying loads. This improves the combustion efficiency of gas appliances when the premixer 10 is used. Furthermore, the adjustment shaft 300 drives the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously, thus simplifying the structure of the premixer 10. Therefore, the premixer 10 proposed in this embodiment has a simple structure and ensures that the air-fuel ratio remains within an optimal range under different load conditions, thereby improving the combustion efficiency of gas appliances.

[0214] In one embodiment, the rotation axes of the gas regulator 400 and the air regulator 170 coincide, making the rotation of the air regulator 170 and the gas regulator 400 driven by the regulating shaft 300 more stable. The regulating shaft 300 has high transmission efficiency and simple structure, which helps to simplify the structure of the premixer 10.

[0215] The adjusting shaft 300 drives the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously. When the gas conditioning component 400 rotates within a first angular range, the air conditioning component 170 also rotates within the first angular range. When the air conditioning component 170 rotates within the first angular range, the gap between the air conditioning component 170 and the inner wall of the air passage 120 changes, thereby adjusting the air passage area of ​​the air passage 120.

[0216] In this embodiment, the first angle range is 0 degrees to 90 degrees. For the air conditioning component 170, 0 degrees can represent the air conditioning component 170 at a preset initial position, which corresponds to the preset initial position of the gas regulating component 400. The preset initial position of the air conditioning component 170 is the position where the air conditioning component 170 adjusts the air passage area of ​​the air channel 120 to S3. The ratio of the amount of air flowing through the air passage area of ​​the air channel 120 at S3 to the amount of gas flowing through the gas passage area of ​​the first gas at S1 is the preset first air-fuel ratio of the premixer 10.

[0217] When the gas regulator 400 is at the 0-degree position, this is the minimum amount of first gas mixed by the premixer 10; when the air regulator 170 is at the 0-degree position, this is the minimum amount of air mixed by the premixer 10; the minimum amount of first gas mixed by the premixer 10 and the minimum amount of air mixed by the premixer 10 are mixed to form the minimum amount of first premixed gas, and the minimum amount of first premixed gas corresponds to the minimum load of the first gas.

[0218] When the air conditioning component 170 is at a 90-degree position, the gap between the air conditioning component 170 and the inner wall of the air passage 120 is at its maximum, which is the maximum amount of air mixed by the premixer 10. When the gas conditioning component 400 is at a 90-degree position, the premixer 10 mixes the maximum amount of the first gas. The maximum amount of the first gas mixed by the premixer 10 and the maximum amount of air mixed by the premixer 10 are mixed to form the maximum amount of the first premixed gas. The maximum amount of the first premixed gas corresponds to the maximum load of the first gas.

[0219] When the air conditioning element 170 is in a position between 0 degrees and 90 degrees, the amount of air mixed by the premixer 10 is between the minimum and maximum, thus achieving the adjustment of the air passage area of ​​the air channel 120.

[0220] When the gas regulator 400 rotates within the second angle range, the air regulator 170 also rotates within the second angle range. When the air regulator 170 rotates within the second angle range, the gap between the air regulator 170 and the inner wall of the air passage 120 changes, thereby adjusting the air passage area of ​​the air passage 120.

[0221] In this embodiment, the second angle range is 180 degrees to 270 degrees. For the air conditioning component 170, 180 degrees means that the air conditioning component 170 has rotated 180 degrees from the aforementioned 0 degrees in the first angle range, that is, it has rotated 180 degrees from its preset initial position. The preset initial position of the air conditioning component 170 corresponds to the preset initial position of the gas regulator 400. 270 degrees means that the air conditioning component 170 has rotated 180 degrees from the aforementioned 90 degrees in the first angle range.

[0222] like Figures 3 to 5 As shown, when the air conditioning component 170 is at the 180-degree position, the air conditioning component 170 adjusts the air passage area of ​​the air channel 120 to S3. The ratio of the amount of air flowing through the air passage area of ​​the air channel 120 at S3 to the amount of gas flowing through the gas passage area of ​​the second fuel at S2 is the preset second air-fuel ratio of the premixer 10. That is to say, when the fuel regulator 400 is at the 180-degree position, this is the minimum amount of the second fuel mixed by the premixer 10; when the air conditioning component 170 is at the 180-degree position, this is the minimum amount of air mixed by the premixer 10; the minimum amount of the second fuel mixed by the premixer 10 and the minimum amount of air mixed by the premixer 10 combine to form the minimum amount of the second premixed gas, and the minimum amount of the second premixed gas corresponds to the minimum load of the second fuel.

[0223] like Figures 6 to 8 As shown, when the air conditioning component 170 is at the 270-degree position, the gap between the air conditioning component 170 and the inner wall of the air passage 120 is at its maximum, which is the maximum amount of air mixed by the premixer 10. When the gas conditioning component 400 is at the 270-degree position, the maximum amount of second gas mixed by the premixer 10 is reached. The maximum amount of second gas mixed by the premixer 10 and the maximum amount of air mixed by the premixer 10 are mixed to form the maximum amount of second premixed gas. The maximum amount of second premixed gas corresponds to the maximum load of the second gas.

[0224] When the air conditioning element 170 is positioned between 180 degrees and 270 degrees, the amount of air mixed by the premixer 10 is between its minimum and maximum, thus enabling the adjustment of the air passage area of ​​the air channel 120.

[0225] In one embodiment, the premixer body 100 includes a base 140, which has a mounting through hole that connects an air passage 120 and a gas passage 110. An adjusting shaft 300 passes through a gas distribution chamber 250 and extends into the air passage 120 through the mounting through hole. An air conditioning component 170 and a gas conditioning component 400 are arranged on both sides of the mounting through hole along the axial direction of the adjusting shaft 300.

[0226] It is understandable that by setting the mounting through hole, the adjusting shaft 300 can be easily inserted into the base 140. Part of the adjusting shaft 300 extends into the air passage 120 through the mounting through hole, and part of the adjusting shaft 300 is located in the gas distribution chamber 250. The air conditioning component 170 is located on the adjusting shaft 300 in the air passage 120, and the gas conditioning component 400 is located on the adjusting shaft 300 in the gas distribution chamber 250. That is, the air conditioning component 170 and the gas conditioning component 400 are located on both sides of the mounting through hole along the axial direction of the adjusting shaft 300. In this way, one adjusting shaft 300 can drive the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously.

[0227] The premixer 10 also includes a sealing ring, which is fitted onto the adjusting shaft 300 and located inside the mounting through hole to seal the gap between the adjusting shaft 300 and the mounting through hole.

[0228] In one embodiment, the rotation axis of the air conditioning component 170 intersects the centerline of the air passage 120. This arrangement makes the distribution of the air conditioning component 170 within the air passage 120 more uniform, simplifying the design and manufacturing difficulty of the parts, thus reducing the complexity of the parts. The centerline of the air passage 120 refers to an imaginary straight line passing through the center of airflow within the air passage 120, i.e., the geometric centerline traversing the air passage 120, and typically represents the direction of airflow.

[0229] In one embodiment, the air conditioning element 170 is disposed within the air passage 120, thereby preventing the air conditioning element 170 from extending beyond the seat 140, which is beneficial for miniaturization of the premixer 10.

[0230] like Figures 3 to 5 As shown, in one embodiment, the air conditioning component 170 has a first blocking position that adjusts the air passage area of ​​the air channel 120 to a minimum. In the first blocking position, an air passage gap is formed between the outer wall of the air conditioning component 170 and the inner wall of the air channel 120. This configuration ensures that air can always flow into the mixing channel 130 from the gap between the air conditioning component 170 and the inner wall of the air channel 120, regardless of the angle at which the air conditioning component 170 rotates. This helps reduce the difficulty for the premixer 10 to adjust the air intake volume.

[0231] like Figures 3 to 5As shown, in the first shielded position, the area of ​​the air passage gap between the outer wall of the air conditioner 170 and the inner wall of the air passage 120 is S3. The minimum air passage area required when the gas is under minimum load is S1. The ratio of the amount of air flowing through the air passage gap area S3 to the amount of gas flowing through the gas passage 110 with the gas passage area S1 is the preset air-fuel ratio of the premixer 10. The preset air-fuel ratio of the premixer 10 is a design value, thus determining the size of the air passage gap area S3. The first shielded position of the air conditioner 170 is the preset initial position of the air conditioner 170 mentioned above, which is also the position of the air conditioner 170 at 0 degrees.

[0232] In one embodiment, the air conditioning component 170 includes an air flap rotatably disposed within the air channel 120 to open or close the air channel 120; the rotation axis of the air flap is perpendicular to the centerline of the air channel 120; a virtual plane formed by the rotation axis of the air flap and the centerline of the air channel 120 is defined as a first plane; the air flap has a first state and a second state; in the first state, the air flap is perpendicular to the first plane, such as... Figures 3 to 5 As shown. In the second state, the air flap is parallel to the first plane, as... Figures 6 to 8 As shown.

[0233] It is understandable that the centerline of the air passage 120 refers to an imaginary straight line passing through the center of airflow within the air passage 120, that is, the geometric centerline traversing the air passage 120, and usually indicates the direction of airflow. The rotation axis of the air flap and the centerline of the air passage 120 form a first plane. In the first state, the air flap is perpendicular to the first plane, at which point the air passage 120 has the smallest air passage area. In the second state, the air flap is parallel to the first plane, at which point the air passage 120 has the largest air passage area.

[0234] When the air flap rotates within the first angle range (0 to 90 degrees in this embodiment), the position of the air flap in the first state is the position at 0 degrees; the position of the air flap in the second state is the position at 90 degrees. The definition of the first angle range as 0 to 90 degrees is as described above and will not be repeated here.

[0235] When the air flap rotates within the second angle range, in this embodiment, the second angle range is 180 degrees to 270 degrees. The position of the air flap in the first state is the position of the air flap at 180 degrees; the position of the air flap in the second state is the position of the air flap at 270 degrees. The content regarding the second angle range of 180 degrees to 270 degrees can be referred to the foregoing and will not be repeated here.

[0236] Please see Figure 4 and Figure 5 In one embodiment, the gas passage 110 includes a gas equalization chamber 111. The gas outlets of the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230 are all connected to the gas mixing passage 130 through the gas equalization chamber 111. The gas equalization chamber 111 is provided with a corner 112 so that the gas flows into the gas mixing passage 130 evenly.

[0237] It is understandable that by setting a corner 112 in the gas flow equalization chamber 111, the flow direction of the gas in the gas flow equalization chamber 111 can be changed, thereby adjusting the uniformity of the gas so that the gas after passing through the corner 112 flows into the mixing channel 130 in a uniform distribution. As for the angle of the corner 112, it is not limited, for example but not limited to: 60 degrees, 90 degrees, 150 degrees, 180 degrees, etc., and can be set according to the specific needs.

[0238] In one embodiment, the angle of corner 112 is 180 degrees, such that the flow direction of the gas flowing out of corner 112 is opposite to the flow direction of the gas flowing into corner 112.

[0239] In one embodiment, the gas flow equalization cavity 111 located downstream of the corner 112 is arranged in a ring shape, so that the gas flowing out from the corner 112 can be dispersed around the ring-shaped gas flow equalization cavity 111, which helps to improve the uniformity of gas distribution.

[0240] In one embodiment, the air flow direction along the air channel 120 is parallel to the flow direction of the gas as it passes through at least one of the first gas distribution hole 210 and the second gas distribution hole 220. This arrangement causes the gas flowing out from the outlet of the gas distribution hole to change its flow direction at the corner 112, improving the uniformity of gas distribution. The uniformly distributed gas then mixes with the air in the mixing channel 130, further enhancing the uniformity of the mixed gas.

[0241] Please see Figure 4 and Figure 5In one embodiment, the first gas distribution hole 210 and the second gas distribution hole 220 are disposed on the same plate of the gas distribution component 200 and are spaced apart; a gas injection inlet 530 is formed at the intersection of the gas equalization chamber 111 and the gas mixing channel 130; along the axial direction of the adjusting shaft 300, the corner 112 is located between the first gas distribution hole 210 and the gas injection inlet 530; in the flow direction of the gas through the first gas distribution hole 210, the corner 112 and the gas injection inlet 530 are offset; along the axial projection of the adjusting shaft 300, the gas injection inlet 530 and the first gas distribution hole 210 are located on the same side of the corner 112, so that the flow direction of the gas in a part of the gas channel 110 is opposite to the flow direction of the gas when passing through the first gas distribution hole 210. This configuration defines the relative positions of the first gas distribution hole 210, the corner 112, and the gas injection inlet 530. Along the flow direction of the gas in the gas channel 110, the corner 112 changes the flow direction of the gas in the gas equalization chamber 111, so that the gas can flow evenly through the gas injection inlet 530 and into the mixing channel 130.

[0242] Please see Figures 2 to 8 as well as Figure 17 and Figure 18 In one embodiment, the premixer 10 further includes a Venturi tube 500. The Venturi tube 500 has a Venturi channel 510 and an air inlet 520, a gas injection inlet 530, and a mixed gas outlet 540 connected to the Venturi channel 510. The Venturi tube 500 is disposed within the mixed gas channel 130. The air inlet 520 is connected to the air channel 120, and the gas injection inlet 530 is connected to the gas channel 110. The Venturi channel 510 is used to allow air from the air channel 120 to flow in and to inject gas from the gas channel 110 for mixing of air and gas. The Venturi tube 500 is a pipe that uses the principle of fluid flow to regulate the flow rate. By changing the cross-sectional area of ​​the pipe, the speed and pressure of the fluid are controlled, thereby achieving flow rate or flow control.

[0243] In one embodiment, the venturi tube 500 includes a first tube section 550 and a second tube section 560. The first tube section 550 includes a tapered section 551 and a transition section 552 arranged sequentially along the air outlet direction of the air passage 120. The end of the tapered section 551 away from the transition section 552 has an air inlet 520. The end of the transition section 552 away from the tapered section 551 is inserted into the second tube section 560. The outer wall of the transition section 552 is spaced apart from the inner wall of the second tube section 560 to form a gas injection inlet 530. The air passage area of ​​the air inlet 520 is larger than the air passage area of ​​the transition section 552, and the air passage area of ​​the transition section 552 is smaller than the air passage area of ​​the second tube section 560. With this configuration, when air passes through the converging section 551, the air velocity increases and the pressure decreases. The air velocity becomes the fastest and the pressure decreases the lowest in the transition section 552 before flowing into the second pipe section 560. Because the air passage area of ​​the transition section 552 is smaller than that of the second pipe section 560, a negative pressure is formed at the gas injection inlet 530, which is formed between the transition section 552 and the second pipe section 560. Under the action of the negative pressure, the gas is drawn into the second pipe section 560 and mixed with the air to form a mixed gas.

[0244] In one embodiment, the gas injection inlet 530 is arranged in a ring shape, and the venturi tube 500 further includes a connecting portion 570. At least part of the connecting portion 570 is provided in the gas injection inlet 530 and connects the outer wall of the transition section 552 and the inner wall of the second pipe section 560 to separate the gas injection inlet 530.

[0245] The first pipe section 550 and the second pipe section 560 are connected by the connecting part 570, which ensures that the outer wall of the transition section 552 and the inner wall of the second pipe section 560 can form a gas injection inlet 530 at intervals, thus realizing the function of injecting gas. Furthermore, the connecting part 570 separates the gas injection inlet 530, so that gas can flow into the second pipe section 560 from different directions, thereby improving the uniformity of gas flow into the second pipe section 560.

[0246] In one embodiment, the venturi tube 500 includes a plurality of connecting portions 570, which are arranged sequentially at intervals around the circumference of the transition section 552 to divide the gas injection inlet 530 into multiple parts. This arrangement not only improves the stability of the connection between the first pipe section 550 and the second pipe section 560, but also improves the uniformity of the gas flow into the second pipe section 560, that is, improves the uniformity of the gas mixture.

[0247] In one embodiment, the first pipe segment 550, the second pipe segment 560, and the plurality of connecting parts 570 are an integral structure. This configuration, where the first pipe segment 550, the second pipe segment 560, and the plurality of connecting parts 570 are integrated into a single unit, reduces assembly and manufacturing costs and improves the stability of the venturi tube 500.

[0248] In one embodiment, the premixer 10 further includes a second seal 700, which is fitted onto the venturi tube 500 to seal the gap between the venturi tube 500 and the inner wall of the mixing channel 130 at the outlet of the mixing channel 130.

[0249] In one embodiment of this application, the premixer 10 includes a premixer body 100, a gas distributor 200, an adjusting shaft 300, and a gas adjusting component 400. The premixer body 100 has a gas passage 110. At least a portion of the gas distributor 200 is disposed within the gas passage 110. The gas distributor 200 has a first gas distribution hole 210, a second gas distribution hole 220, and a third gas distribution hole 230 respectively communicating with the gas passage 110. The first gas distribution hole 210 and the second gas distribution hole 220 are spaced apart, and the patterns formed by the first gas distribution hole 210 and the second gas distribution hole 220 are not congruent. At least a portion of the adjusting shaft 300 is rotatably disposed within the gas passage 110. The gas adjusting component 400... A gas regulating component 400, mounted on the regulating shaft 300 and located within the gas passage 110, can rotate synchronously with the regulating shaft 300. When the gas regulating component 400 rotates within a first angular range, the second gas distribution hole 220 is blocked, and the third gas distribution hole 230 is fully opened. The gas regulating component 400 adjusts the air passage area of ​​the first gas distribution hole 210 by rotating, thereby regulating the amount of gas flowing through the first gas distribution hole 210. When the gas regulating component 400 rotates within a second angular range, the first gas distribution hole 210 is blocked, and the third gas distribution hole 230 is fully opened. The gas regulating component 400 adjusts the air passage area of ​​the second gas distribution hole 220 by rotating, thereby regulating the amount of gas flowing through the second gas distribution hole 220. The third gas distribution hole 230 is spaced apart from the first gas distribution hole 210 and the second gas distribution hole 220 and is located between the first gas distribution hole 210 and the second gas distribution hole 220. The first gas distribution hole 210 is used to supply the first gas, and the second gas distribution hole 220 is used to supply the second gas. The minimum gas passage area required when the first gas is under minimum load is S1, and the minimum gas passage area required when the second gas is under minimum load is S2. S1 is greater than S2. The area of ​​the third gas distribution hole 230 is S2. The gas distribution component 200 is also provided with a fourth gas distribution hole 240 that communicates with the gas passage 110. The fourth gas distribution hole 240 is spaced apart from the third gas distribution hole 230, and the area of ​​the fourth gas distribution hole 240 is the difference between S1 and S2. When the gas regulating component 400 rotates within a first angle range, the fourth gas distribution hole 240 is fully opened; when the gas regulating component 400 rotates within a second angle range, the fourth gas distribution hole 240 is blocked. The gas distribution component 200 has a gas distribution cavity 250 and a gas inlet 260, a first gas distribution hole 210, a second gas distribution hole 220, a third gas distribution hole 230 and a fourth gas distribution hole 240 respectively connected to the gas distribution cavity 250. The gas inlet 260 is used to connect with an external gas source. The first gas regulating part 410 and the second gas regulating part 420 are rotatably disposed in the gas distribution cavity 250.The first gas distribution hole 210, the second gas distribution hole 220, the third gas distribution hole 230, and the fourth gas distribution hole 240 are all located on the first side of the gas distribution component 200; the gas inlet hole 260 is located on the second side of the gas distribution component 200, and the first side and the second side are arranged adjacent to or opposite to each other. The first gas regulating part 410 and the regulating shaft 300 form a first gas supply groove 430, or the first gas regulating part 410 is provided with a first gas supply groove 430; the second gas regulating part 420 and the regulating shaft 300 form a second gas supply groove 440, or the second gas regulating part 420 is provided with a second gas supply groove 440; when the first gas regulating part 410 and the second gas regulating part 420 rotate within a first angle range, a portion of the groove opening of the first gas supply groove 430 faces the first gas distribution hole 210 or faces outward from the first gas distribution hole 210, and a portion of the groove opening of the first gas supply groove 430 faces the fourth gas distribution hole 240. The opening of the second gas supply groove 440 is oriented towards the outside of the second gas distribution hole 220, and the outer peripheral wall of the second gas regulating part 420 blocks the second gas distribution hole 220; when the first gas regulating part 410 and the second gas regulating part 420 rotate within the second angle range, the opening of the first gas supply groove 430 is oriented towards the outside of the first gas distribution hole 210 and the fourth gas distribution hole 240, and the outer peripheral wall of the first gas regulating part 410 blocks the first gas distribution hole 210 and the fourth gas distribution hole 240; the opening of the second gas supply groove 440 is oriented towards the second gas distribution hole 220 or towards the outside of the second gas distribution hole 220. The first gas regulating part 410 is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft 300 and surrounds the remaining outer peripheral wall of the regulating shaft 300 to form a first gas supply groove 430. The first gas supply groove 430 has a first groove 431 and a second groove 432. The first groove 431 is opened along the axial direction of the regulating shaft 300 toward the second gas regulating part 420 and communicates with the gas inlet hole 260. The second groove 432 is opened radially outward along the regulating shaft 300. The second groove 432 is configured to selectively face the first gas distribution hole 210 and / or the fourth gas distribution hole 240 as the first gas regulating part 410 rotates. The second gas regulating section 420 is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft 300 and surrounds the remaining outer peripheral wall of the regulating shaft 300 to form a second gas supply groove 440. The second gas supply groove 440 has a third groove 441 and a fourth groove 442. The third groove 441 is opened along the axial direction of the regulating shaft 300 toward the first gas regulating section 410 and communicates with the gas inlet hole 260. The fourth groove 442 is opened along the radial direction of the regulating shaft 300 toward the direction away from the second groove 432. The fourth groove 442 is configured to selectively face the second gas distribution hole 220 as the second gas regulating section 420 rotates.The walls of the gas distribution chambers 250 at the first gas distribution hole 210 and the second gas distribution hole 220 are both circular in cross-section along the radial direction of the adjusting shaft 300. The first gas adjusting part 410 has a first arc-shaped outer wall surface that matches the wall of the gas distribution chamber 250. The second gas adjusting part 420 has a second arc-shaped outer wall surface that matches the wall of the gas distribution chamber 250. The first gas adjusting part 410 and the second gas adjusting part 420 are fan-shaped in cross-section along the radial direction of the adjusting shaft 300.

[0250] The premixer body 100 also has an air passage 120 and a mixing passage 130 connecting the gas passage 110 and the air passage 120. The premixer body 100 also includes an air conditioning component 170, which is disposed on the adjustment shaft 300 and located within the air passage 120. The air conditioning component 170 is configured to adjust the air passage area of ​​the air passage 120 as the adjustment shaft 300 rotates, thereby adjusting the amount of air flowing into the mixing passage 130. The gas conditioning component 400 is used to adjust the amount of gas flowing into the mixing passage 130. The gas passage 110 includes a gas equalization chamber 111. The outlet ends of the first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230 are all connected to the mixing passage 130 through the gas equalization chamber 111. The gas equalization chamber 111 is provided with a corner 112 to ensure that the gas flows into the mixing passage 130 evenly. The premixer 10 also includes a venturi tube 500, which has a venturi channel 510 and an air inlet 520, a gas injection inlet 530 and a mixed gas outlet 540 connected to the venturi channel 510. The venturi tube 500 is located in the mixed gas channel 130. The air inlet 520 is connected to the air channel 120 and the gas injection inlet 530 is connected to the gas channel 110. The venturi channel 510 is used to allow air in the air channel 120 to flow in and to inject gas in the gas channel 110 for mixing air and gas.

[0251] This application also proposes a premixer 10, which includes a premixer body 100, an adjusting shaft 300, and a gas adjusting component 400. The premixer body 100 has a gas passage 110 and a gas distribution chamber 250 disposed within the gas passage 110. The inner wall of the gas distribution chamber 250 is cylindrical. A first gas distribution hole 210, a second gas distribution hole 220, a third gas distribution hole 230, a fourth gas distribution hole 240, and a gas inlet hole 260 are provided on the side wall of the gas distribution chamber 250. The first gas distribution hole 210, the second gas distribution hole 220, and the third gas distribution hole 230 are spaced apart from each other, and the third gas distribution hole 230 and the fourth gas distribution hole 240 are spaced apart. The pattern formed by the first gas distribution hole 210 and the pattern formed by the second gas distribution hole 220 are not congruent. The adjusting shaft 300 is rotatably inserted through the gas... Distribution chamber 250; Gas regulator 400 is disposed on part of the outer peripheral wall of regulating shaft 300, and gas regulator 400 has an arc-shaped outer wall surface adapted to the inner wall of gas distribution chamber 250; When gas regulator 400 rotates within a first angle range, the second gas distribution hole 220 is blocked, and the third gas distribution hole 230 and the fourth gas distribution hole 240 are fully opened. Gas regulator 400 adjusts the air passage area of ​​the first gas distribution hole 210 by rotating, so as to regulate the amount of gas flowing through the first gas distribution hole 210; When gas regulator 400 rotates within a second angle range, the first gas distribution hole 210 and the fourth gas distribution hole 240 are blocked, and the third gas distribution hole 230 is fully opened. Gas regulator 400 adjusts the air passage area of ​​the second gas distribution hole 220 by rotating, so as to regulate the amount of gas flowing through the second gas distribution hole 220.

[0252] The beneficial effects of the specific technical features of the premixer 10 in this solution can be referred to the beneficial effects of the corresponding technical features of the premixer 10 in the foregoing embodiments, and will not be repeated here.

[0253] In one embodiment, the number of first gas distribution holes 210 is one or more; the number of second gas distribution holes 220 is one or more; the number of third gas distribution holes 230 is one or more; and the number of fourth gas distribution holes 240 is one or more. This arrangement allows the number of first gas distribution holes 210, second gas distribution holes 220, third gas distribution holes 230, and fourth gas distribution holes 240 to be set as needed.

[0254] The present invention also proposes a gas device, which includes a premixer 10 as described above. The specific structure of the premixer 10 is as described in the above embodiments. Since the gas device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0255] In this embodiment, the gas equipment can be a gas water heater, a wall-hung boiler, a gas stove, or other similar devices. The gas equipment may also include a burner and a fan. After air and gas are mixed in the premixer 10 to form a premixed gas, the premixed air enters the burner under the action of the fan and flows out of the burner's flame holes to achieve ignition and combustion. The premixer 10 can be adjusted to improve the combustion efficiency of the gas equipment.

[0256] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A premixer, characterized in that, include: The premixer body has a gas passage; A gas distribution component, at least a portion of which is disposed within the gas channel, wherein the gas distribution component is provided with a first gas distribution hole, a second gas distribution hole, and a third gas distribution hole respectively communicating with the gas channel, the first gas distribution hole and the second gas distribution hole being spaced apart, and the pattern formed by the first gas distribution hole and the pattern formed by the second gas distribution hole being non-congruent. An adjusting shaft, at least a portion of which is rotatably disposed within the gas passage; as well as A gas regulator is mounted on the regulating shaft and located within the gas passage; the gas regulator can rotate synchronously with the regulating shaft. When the gas regulator rotates within the first angle range, the second gas distribution hole is blocked and the third gas distribution hole is fully opened. The gas regulator adjusts the gas passage area of ​​the first gas distribution hole by rotating, so as to adjust the amount of gas flowing through the first gas distribution hole. When the gas regulator rotates within the second angle range, the first gas distribution hole is blocked and the third gas distribution hole is fully opened. The gas regulator adjusts the gas passage area of ​​the second gas distribution hole by rotating, thereby adjusting the amount of gas flowing through the second gas distribution hole.

2. The premixer as described in claim 1, characterized in that, The first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are spaced apart along the axial direction of the gas regulating component; And / or, the third gas distribution hole is spaced apart from the first gas distribution hole and the second gas distribution hole and is located between the first gas distribution hole and the second gas distribution hole; And / or, the first angle range and the second angle range do not overlap.

3. The premixer as described in claim 1, characterized in that, The first gas distribution hole is used to supply the first gas, the second gas distribution hole is used to supply the second gas, the minimum gas passage area required when the first gas is under minimum load is S1, the minimum gas passage area required when the second gas is under minimum load is S2, S1 is greater than S2, and the area of ​​the third gas distribution hole is S2.

4. The premixer as described in claim 3, characterized in that, The gas distribution component is also provided with a fourth gas distribution hole that communicates with the gas channel. The fourth gas distribution hole is spaced apart from the third gas distribution hole, and the area of ​​the fourth gas distribution hole is the difference between S1 and S2. When the gas regulator rotates within the first angle range, the fourth gas distribution hole is fully opened; when the gas regulator rotates within the second angle range, the fourth gas distribution hole is blocked.

5. The premixer as described in claim 4, characterized in that, The maximum gas flow area of ​​the first gas distribution hole is greater than that of the second gas distribution hole. The fourth gas distribution hole is located close to the first gas distribution hole. The fourth gas distribution hole is connected to or spaced apart from the first gas distribution hole.

6. The premixer as claimed in claim 1, characterized in that, The number of the first gas distribution holes is one or more; the number of the second gas distribution holes is one or more; the number of the third gas distribution holes is one or more.

7. The premixer as claimed in claim 1, characterized in that, The number of first gas distribution holes is multiple, and any two first gas distribution holes have the same area, or at least two first gas distribution holes have different areas; the number of second gas distribution holes is multiple, and any two second gas distribution holes have the same area, or at least two second gas distribution holes have different areas; the number of third gas distribution holes is multiple, and any two third gas distribution holes have the same area, or at least two third gas distribution holes have different areas.

8. The premixer as claimed in claim 4, characterized in that, The number of the fourth gas distribution holes is one or more.

9. The premixer as claimed in claim 4, characterized in that, The number of the fourth gas distribution holes is multiple, and any two of the fourth gas distribution holes have the same area, or at least two of the fourth gas distribution holes have different areas.

10. The premixer as claimed in claim 1, characterized in that, The gas distribution component has a gas distribution cavity and a gas inlet, a first gas distribution hole, a second gas distribution hole, and a third gas distribution hole that are respectively connected to the gas distribution cavity. The gas regulating component is rotatably disposed in the gas distribution cavity, and the gas inlet is used to communicate with an external gas source.

11. The premixer as claimed in claim 10, characterized in that, The first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are circumferentially spaced on the side wall of the gas distribution component around the adjusting shaft; And / or, the number of the gas regulators is one; And / or, the gas regulator includes a fan-shaped baffle or a fan-shaped baffle block.

12. The premixer as claimed in claim 10, characterized in that, The gas regulator includes a first gas regulating part and a second gas regulating part disposed on the regulating shaft. The first gas regulating part and the second gas regulating part can rotate synchronously with the regulating shaft within the gas distribution chamber. When the adjusting shaft rotates within the first angle range, the first gas adjusting part fully or partially opens the first gas distribution hole, the second gas adjusting part blocks the second gas distribution hole, and the third gas distribution hole is fully opened; When the adjusting shaft rotates within the second angle range, the first gas adjusting part blocks the first gas distribution hole, the third gas distribution hole is fully opened, and the second gas adjusting part adjusts the gas passage area of ​​the second gas distribution hole by rotating.

13. The premixer as claimed in claim 4, characterized in that, The gas regulator includes a first gas regulator and a second gas regulator. Both the first gas regulator and the second gas regulator are mounted on the regulator shaft and can rotate synchronously with the regulator shaft. When the adjusting shaft rotates within the first angle range, the first gas adjusting part adjusts the gas passage area of ​​the first gas distribution hole by rotating, the second gas adjusting part blocks the second gas distribution hole, the third gas distribution hole is fully opened, and the first gas adjusting part fully opens the fourth gas distribution hole. When the adjusting shaft rotates within the second angle range, the first gas adjusting part blocks the first gas distribution hole and the fourth gas distribution hole, the third gas distribution hole is fully opened, and the second gas adjusting part adjusts the gas passage area of ​​the second gas distribution hole by rotating.

14. The premixer as claimed in claim 13, characterized in that, The gas distribution component has a gas distribution cavity and a gas inlet, a first gas distribution hole, a second gas distribution hole, a third gas distribution hole, and a fourth gas distribution hole, which are respectively connected to the gas distribution cavity. The gas inlet is used to communicate with an external gas source. The first gas regulating part and the second gas regulating part are rotatably disposed in the gas distribution cavity. And / or, the first gas regulating part and the second gas regulating part are spaced apart along the axial direction of the regulating shaft, and the projection of the third gas distribution hole along the axial direction of the third gas distribution hole, the third gas distribution hole is located between the first gas regulating part and the second gas regulating part.

15. The premixer as claimed in claim 14, characterized in that, The first gas distribution hole, the second gas distribution hole, the third gas distribution hole, and the fourth gas distribution hole are all located on the first side of the gas distribution component; the gas inlet hole is located on the second side of the gas distribution component, and the first side and the second side are arranged adjacent to or opposite to each other; And / or, the number of the gas inlet ports is one or more; And / or, the first gas regulating part and the second gas regulating part are spaced apart along the axial direction of the regulating shaft, and at least a portion of the gas inlet hole is located between the first gas regulating part and the second gas regulating part, as projected along the axial direction of the gas inlet hole.

16. The premixer as claimed in claim 14, characterized in that, The first gas regulating part and the regulating shaft form a first gas supply groove, or the first gas regulating part is provided with a first gas supply groove; the second gas regulating part and the regulating shaft form a second gas supply groove, or the second gas regulating part is provided with a second gas supply groove. When the first gas regulating unit and the second gas regulating unit rotate within the first angle range, a portion of the opening of the first gas supply groove is positioned facing the first gas distribution hole or facing outward from the first gas distribution hole, and a portion of the opening of the first gas supply groove is positioned facing the fourth gas distribution hole; the opening of the second gas supply groove is positioned facing outward from the second gas distribution hole, and the outer peripheral wall of the second gas regulating unit blocks the second gas distribution hole; When the first gas regulating unit and the second gas regulating unit rotate within the second angle range, the opening of the first gas supply groove is oriented towards the outside of the first gas distribution hole and the outside of the fourth gas distribution hole, and the outer peripheral wall of the first gas regulating unit blocks the first gas distribution hole and the fourth gas distribution hole; the opening of the second gas supply groove is oriented towards the second gas distribution hole or towards the outside of the second gas distribution hole.

17. The premixer as claimed in claim 16, characterized in that, The first gas regulating part is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft, and together with the remaining outer peripheral wall of the regulating shaft, forms the first gas supply groove. The first gas supply groove has a first groove and a second groove. The first groove is opened along the axial direction of the regulating shaft toward the second gas regulating part and communicates with the gas inlet hole. The second groove is opened radially outward along the regulating shaft. The second groove is configured to selectively face the first gas distribution hole and / or the fourth gas distribution hole as the first gas regulating part rotates.

18. The premixer as claimed in claim 17, characterized in that, The gas regulating component further includes a first gas blocking part, which is located at one end of the first gas supply groove away from the first slot opening along the axial direction of the regulating shaft. The first slot opening is located between the first gas blocking part and the second gas regulating part. The first gas blocking part is used to block the end of the first gas supply groove away from the gas inlet.

19. The premixer as claimed in claim 17, characterized in that, The second gas regulating part is circumferentially disposed on a portion of the outer peripheral wall of the regulating shaft, and together with the remaining outer peripheral wall of the regulating shaft, forms the second gas supply groove. The second gas supply groove has a third groove and a fourth groove. The third groove is opened along the axial direction of the regulating shaft toward the first gas regulating part and communicates with the gas inlet hole. The fourth groove is opened along the radial direction of the regulating shaft toward the direction away from the second groove. The fourth groove is configured to selectively face the second gas distribution hole as the second gas regulating part rotates.

20. The premixer as claimed in claim 19, characterized in that, The gas regulating component further includes a second gas blocking part, which is located at one end of the second gas supply groove away from the third slot along the axial direction of the regulating shaft. The third slot is located between the second gas blocking part and the first gas regulating part. The second gas blocking part is used to block the end of the second gas supply groove away from the gas inlet.

21. The premixer as claimed in claim 16, characterized in that, The first gas regulating part is provided with a first gas passage hole located between the regulating shaft and the outer peripheral wall of the first gas regulating part, and the first gas passage hole passes through the opposite sides of the first gas regulating part along the circumferential direction of the regulating shaft; And / or, the second gas regulating part is provided with a second gas passage hole located between the regulating shaft and the outer peripheral wall of the second gas regulating part, and the second gas passage hole passes through the opposite sides of the second gas regulating part along the circumferential direction of the regulating shaft.

22. The premixer as claimed in claim 14, characterized in that, The cavity walls of the gas distribution chambers at the first gas distribution hole and the second gas distribution hole are both circular in cross-section along the radial direction of the adjustment shaft; And / or, the first gas regulating part has a first arcuate outer wall surface adapted to the cavity wall of the gas distribution cavity; the second gas regulating part has a second arcuate outer wall surface adapted to the cavity wall of the gas distribution cavity.

23. The premixer as claimed in claim 22, characterized in that, The first gas regulating section is arranged in a fan shape along the radial direction of the regulating shaft; And / or, the second gas regulating section is arranged in a fan shape in the radial section along the regulating axis.

24. The premixer as claimed in claim 14, characterized in that, The gas distribution component is provided with a first mounting hole communicating with the gas distribution cavity, and the first gas regulating part and the second gas regulating part are installed in the gas distribution cavity through the first mounting hole; the opening direction of the first mounting hole faces the axial direction of the regulating shaft; And / or, the centerline of the first mounting hole coincides with the axis of the adjusting shaft.

25. The premixer as claimed in claim 24, characterized in that, The gas distribution component has a first sidewall and a second sidewall opposite to each other, and a third sidewall and a fourth sidewall located between the first sidewall and the second sidewall and arranged circumferentially around the gas regulating component. The third sidewall and the fourth sidewall are arranged adjacent to or opposite to each other. The first mounting hole is provided on the first sidewall, and the second sidewall is provided with a second mounting hole for the regulating shaft to pass through. The gas inlet is provided on the third sidewall. The first gas distribution hole, the second gas distribution hole, the third gas distribution hole and the fourth gas distribution hole are all provided on the fourth sidewall and are spaced apart.

26. The premixer as claimed in claim 1, characterized in that, The premixer body includes a base and a cover plate. The base is provided with the gas passage. One side of the base is provided with an installation port communicating with the gas passage. The gas distributor is installed in the gas passage through the installation port. The cover plate is detachably closed to the installation port. The premixer body includes an regulator. One end of the regulating shaft passes through the cover plate and is drivenly connected to the regulator. And / or, the regulating shaft and the gas regulating component are an integral structure.

27. The premixer according to any one of claims 1 to 26, characterized in that, The premixer body also has an air passage and a mixing passage connecting the gas passage and the air passage. The premixer body also includes an air conditioning element, which is rotatably disposed in the air passage. The air conditioning element is configured to adjust the air passage area of ​​the air passage by rotation, so as to adjust the amount of air flowing into the mixing passage.

28. The premixer according to any one of claims 1 to 26, characterized in that, The premixer body also has an air passage and a mixing passage connecting the gas passage and the air passage. The premixer body also includes an air conditioning component, which is disposed on the adjustment shaft and located in the air passage. The air conditioning component is configured to adjust the air passage area of ​​the air passage with the rotation of the adjustment shaft to adjust the amount of air flowing into the mixing passage. The gas conditioning component is used to adjust the amount of gas flowing into the mixing passage.

29. The premixer as claimed in claim 28, characterized in that, The gas passage includes a gas equalization chamber. The gas outlets of the first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are all connected to the gas mixing passage through the gas equalization chamber. The gas equalization chamber has a corner to ensure that the gas flows into the gas mixing passage evenly.

30. The premixer as claimed in claim 29, characterized in that, The air flows in the direction parallel to the flow direction of the gas as it passes through at least one of the first gas distribution hole and the second gas distribution hole.

31. The premixer as claimed in claim 30, characterized in that, The first gas distribution hole and the second gas distribution hole are disposed on the same plate of the gas distribution component and are spaced apart; a gas injection inlet is formed at the intersection of the gas uniform flow chamber and the gas mixing channel; along the axial direction of the adjusting shaft, the corner is located between the first gas distribution hole and the gas injection inlet; in the flow direction of gas through the first gas distribution hole, the corner and the gas injection inlet are offset; along the axial projection of the adjusting shaft, the gas injection inlet and the first gas distribution hole are located on the same side of the corner, so that the flow direction of gas in a part of the gas channel is opposite to the flow direction of gas when passing through the first gas distribution hole.

32. The premixer according to any one of claims 1 to 31, characterized in that, The premixer also includes a Venturi tube, which has a Venturi channel and an air inlet, a gas injection inlet, and a mixed gas outlet communicating with the Venturi channel. The Venturi tube is located in the mixed gas channel. The air inlet is communicating with the air channel, and the gas injection inlet is communicating with the gas channel. The Venturi channel is used to allow air to flow into the air channel and to inject gas into the gas channel for mixing air and gas.

33. The premixer as claimed in claim 32, characterized in that, The venturi tube includes a first section and a second section. The first section includes a tapered section and a transition section arranged sequentially along the air outlet direction of the air passage. The end of the tapered section away from the transition section has the air inlet. The end of the transition section away from the tapered section is inserted into the second section. The outer wall of the transition section is spaced apart from the inner wall of the second section to form the gas injection inlet. The air passage area of ​​the air inlet is larger than the air passage area of ​​the transition section, and the air passage area of ​​the transition section is smaller than the air passage area of ​​the second section.

34. The premixer as claimed in claim 33, characterized in that, The gas injection inlet is arranged in a ring shape, and the venturi tube also includes a connecting part. At least part of the connecting part is located inside the gas injection inlet and connects the outer wall of the transition section with the inner wall of the second pipe section to separate the gas injection inlet.

35. A premixer, characterized in that, include: The premixer body has a gas passage and a gas distribution chamber disposed within the gas passage. The inner wall of the gas distribution chamber is cylindrical. A first gas distribution hole, a second gas distribution hole, a third gas distribution hole, a fourth gas distribution hole, and a gas inlet hole are provided on the side wall of the gas distribution chamber. The first gas distribution hole, the second gas distribution hole, and the third gas distribution hole are spaced apart from each other. The third gas distribution hole and the fourth gas distribution hole are spaced apart. The pattern formed by the first gas distribution hole and the pattern formed by the second gas distribution hole are not congruent. An adjusting shaft is rotatably inserted into the gas distribution chamber; A gas regulator is disposed on a portion of the outer peripheral wall of the regulating shaft. The gas regulator has an arc-shaped outer wall surface that matches the inner wall of the gas distribution chamber. When the gas regulator rotates within a first angle range, the second gas distribution hole is blocked, and the third and fourth gas distribution holes are fully opened. The gas regulator adjusts the gas passage area of ​​the first gas distribution hole by rotating, thereby adjusting the amount of gas flowing through the first gas distribution hole. When the gas regulator rotates within the second angle range, the first gas distribution hole and the fourth gas distribution hole are blocked, and the third gas distribution hole is fully opened. The gas regulator adjusts the gas passage area of ​​the second gas distribution hole by rotating, so as to regulate the amount of gas flowing through the second gas distribution hole.

36. The premixer as claimed in claim 35, characterized in that, The number of the first gas distribution holes is one or more; the number of the second gas distribution holes is one or more; the number of the third gas distribution holes is one or more; and the number of the fourth gas distribution holes is one or more.

37. A gas-fired device, characterized in that, Includes the premixer as described in any one of claims 1 to 36.

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