Premixer and gas appliance

Abstract

Disclosed in the present application are a premixer and a gas appliance. The premixer comprises a premixer body, a gas distribution member, a regulation shaft and a gas regulation member, wherein the gas distribution member is provided with gas distribution cavities, and a gas inlet hole, a first gas distribution hole and a second gas distribution hole which are in communication with the gas distribution cavities; the gas distribution cavities comprise a first gas distribution cavity in communication with the first gas distribution hole and a second gas distribution cavity in communication with the second gas distribution hole, the diameter of the first gas distribution cavity is greater than that of the second gas distribution cavity, and the gas flow area of the first gas distribution hole is greater than that of the second gas distribution hole; and the gas regulation member comprises a first gas regulation portion and a second gas regulation portion which are arranged on the regulation shaft, the first gas regulation portion being rotatably arranged in the first gas distribution cavity, and the second gas regulation portion being rotatably arranged in the second gas distribution cavity.

Description

Premixers and gas equipment

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202510776039.0, filed on June 10, 2025, and Chinese patent application No. 202520018853.1, filed on January 3, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of gas heating technology, and in particular to a premixer and gas equipment. Background Technology

[0004] 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.

[0005] 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

[0006] The main objective of this application is to provide a premixer and gas equipment that aims to improve the applicability of the premixer.

[0007] To achieve the above objectives, the premixer proposed in this application includes: a premixer body, a gas distribution component, an adjustment shaft, and a gas adjustment component.

[0008] In one embodiment, the premixer body has a gas passage.

[0009] In one embodiment, the gas distributor is disposed within the gas passage.

[0010] In one embodiment, the gas distribution component has a gas distribution cavity and a gas inlet, a first gas distribution hole, and a second gas distribution hole communicating with the gas distribution cavity.

[0011] In one embodiment, the gas distribution chamber includes a first gas distribution chamber communicating with the first gas distribution hole and a second gas distribution chamber communicating with the second gas distribution hole.

[0012] In one embodiment, the aperture of the first gas distribution chamber is larger than the aperture of the second gas distribution chamber, and the gas passage area of ​​the first gas distribution hole is larger than the gas passage area of ​​the second gas distribution hole.

[0013] In one embodiment, the adjusting shaft is rotatably disposed within the gas distribution chamber.

[0014] In one embodiment, the gas regulator includes a first gas regulator portion and a second gas regulator portion disposed on the regulator shaft.

[0015] In one embodiment, the first gas regulating part is rotatably disposed in the first gas distribution chamber, and the second gas regulating part is rotatably disposed in the second gas distribution chamber.

[0016] In one embodiment, when the adjusting shaft rotates within a first angle range, the first gas adjusting part fully or partially opens the first gas distribution hole, and the second gas adjusting part completely blocks the second gas distribution hole.

[0017] In one embodiment, when the adjusting shaft rotates within a second angle range, the first gas adjusting part completely blocks the first gas distribution hole, and the second gas adjusting part fully or partially opens the second gas distribution hole.

[0018] In one embodiment, the opening width and opening height of the first gas distribution hole define the gas passage area of ​​the first gas distribution hole.

[0019] In one embodiment, the opening width and opening height of the second gas distribution hole define the gas passage area of ​​the second gas distribution hole.

[0020] In one embodiment, the opening width of the first gas distribution hole is greater than the opening width of the second gas distribution hole.

[0021] In one embodiment, the opening height of the first gas distribution hole is greater than the opening height of the second gas distribution hole.

[0022] In one embodiment, the first gas distribution hole and the second gas distribution hole are both located on the first side of the gas distribution component and arranged along the axial direction of the adjustment shaft. The projection of the outline of the air inlet end of the first gas distribution hole onto the radial section of the adjustment shaft forms a first arc.

[0023] In one embodiment, the projection of the profile of the inlet end of the second gas distribution hole onto the radial section of the adjustment shaft forms a second arc.

[0024] In one embodiment, the axis of the adjustment shaft forms a first angle with the line connecting the two ends of the first arc, and the axis of the adjustment shaft forms a second angle with the line connecting the two ends of the second arc, wherein the first angle and the second angle coincide.

[0025] In one embodiment, the first gas distribution hole and the second gas distribution hole are both 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.

[0026] In one embodiment, 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 according to the axial projection of the gas inlet hole.

[0027] In one embodiment, the first angle range and the second angle range do not overlap.

[0028] In one embodiment, the first gas regulating unit and the regulating shaft form a first gas supply groove.

[0029] In one embodiment, the first gas regulating unit is provided with a first gas supply groove.

[0030] In one embodiment, the second gas regulating unit and the regulating shaft form a second gas supply groove.

[0031] In one embodiment, the second gas regulating unit is provided with a second gas supply slot.

[0032] In one embodiment, when the first gas regulating part and the second gas regulating part rotate within a first angle range, at least a portion of the opening of the first gas supply groove is disposed toward the first gas distribution hole; the opening of the second gas supply groove is disposed toward the direction outside the second gas distribution hole, and the outer peripheral wall of the second gas regulating part blocks the second gas distribution hole.

[0033] In one embodiment, when the first gas regulating part and the second gas regulating part rotate within a second angle range, the opening of the first gas supply groove is oriented towards the direction outside the first gas distribution hole, and the outer peripheral wall of the first gas regulating part blocks the first gas distribution hole.

[0034] In one embodiment, at least a portion of the opening of the second gas supply slot is disposed facing the second gas distribution hole.

[0035] In one embodiment, the first gas regulating part is arranged around 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.

[0036] In one embodiment, the first gas supply slot has a first slot and a second slot. The first slot is opened along the axial direction of the adjustment shaft toward the second gas regulating part and communicates with the gas inlet hole. The second slot is opened radially outward along the adjustment shaft. The second slot is configured to selectively face the first gas distribution hole as the first gas regulating part rotates.

[0037] In one embodiment, the second gas regulating part is arranged around 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.

[0038] In one embodiment, the second gas supply slot has a third slot and a fourth slot. The third slot is opened along the axial direction of the adjustment shaft toward the first gas regulating part and communicates with the gas inlet hole. The fourth slot is opened along the radial direction of the adjustment shaft toward the direction away from the second slot. The fourth slot is configured to selectively face the second gas distribution hole as the second gas regulating part rotates.

[0039] In one embodiment, the first gas distribution cavity and the second gas distribution cavity are both circular in cross-section along the radial direction of the adjustment axis. The first gas adjustment part has a first arc-shaped outer wall surface that is adapted to the cavity wall of the first gas distribution cavity, and the second gas adjustment part has a second arc-shaped outer wall surface that is adapted to the cavity wall of the second gas distribution cavity.

[0040] In one embodiment, the first gas regulating section is arranged in a fan shape in the radial section along the regulating axis.

[0041] In one embodiment, the second gas regulating section is arranged in a fan shape in the radial section along the regulating axis.

[0042] In one embodiment, the gas distribution component is provided with a first mounting hole communicating with the gas distribution chamber, and the first gas regulating part and the second gas regulating part are installed in the gas distribution chamber through the first mounting hole; the opening direction of the first mounting hole faces the axial direction of the regulating shaft.

[0043] In one embodiment, the centerline of the first mounting hole coincides with the axis of the adjusting shaft.

[0044] In one embodiment, the gas distributor 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 regulator, the third sidewall and the fourth sidewall being adjacent to or opposite to each other.

[0045] In one embodiment, the first mounting hole is provided on the first side wall, the second side wall is provided with a second mounting hole for the adjustment shaft to pass through, the gas inlet is provided on the third side wall, and the first gas distribution hole and the second gas distribution hole are both provided on the fourth side wall and are spaced apart.

[0046] 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.

[0047] In one embodiment, the premixer body includes a regulator, one end of which passes through the cover plate and is drivenly connected to the regulator.

[0048] In one embodiment, the adjusting shaft and the gas regulating element are an integral structure.

[0049] In one embodiment, the premixer body further includes an air passage and a mixing passage connecting the gas passage and the air passage.

[0050] In one embodiment, the premixer body further 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 regulating element is used to adjust the amount of gas flowing into the mixing passage.

[0051] In one embodiment, the gas passage includes a gas equalization chamber, and the outlet ends of the first gas distribution hole and the second gas distribution hole are both connected to the gas mixing passage through the gas equalization chamber. The gas equalization chamber is provided with a corner so that the gas flows into the gas mixing passage evenly.

[0052] 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.

[0053] 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.

[0054] In one embodiment, a gas injection inlet is formed at the intersection of the gas flow equalization chamber and the gas mixing channel, and the corner is located between the first gas distribution hole and the gas injection inlet along the axial direction of the adjustment shaft.

[0055] In one embodiment, the corner is offset from the gas injection inlet in the flow direction of the gas through the first gas distribution hole.

[0056] In one embodiment, the gas injection inlet and the first gas distribution hole are located on the same side of the corner, as projected along the axial direction of the adjustment shaft, so that the flow direction of the gas in a portion of the gas passage is opposite to the flow direction of the gas when passing through the first gas distribution hole.

[0057] In one embodiment, the first gas distribution chamber and the second gas distribution chamber are a single-chamber structure that is integrally connected.

[0058] In one embodiment, the first gas distribution chamber and the second gas distribution chamber are connected by a channel.

[0059] In one embodiment, the first gas distribution chamber and the second gas distribution chamber are separated and not connected to each other along the axial direction of the adjustment shaft.

[0060] In one embodiment, the premixer further includes a venturi tube having a venturi channel and an air inlet, a gas injection inlet, and a mixture outlet communicating with the venturi channel.

[0061] In one embodiment, the venturi tube is disposed in the mixing channel, the air inlet is connected to the air channel, the gas injection inlet is connected to the gas channel, and the venturi channel is used to allow air in the air channel to flow in and to inject gas in the gas channel for mixing of air and gas.

[0062] In one embodiment, the venturi tube includes a first section and a second section.

[0063] In one embodiment, the first pipe 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 pipe section. The outer wall of the transition section is spaced apart from the inner wall of the second pipe section to form the gas injection inlet.

[0064] In one embodiment, the air inlet has a larger air passage area than the transition section, and the transition section has a smaller air passage area than the second pipe section.

[0065] This application also proposes a premixer, which includes: a premixer body, an adjustment shaft, and a gas adjustment element.

[0066] In one embodiment, the premixer body has a gas passage and a gas distribution chamber disposed within the gas passage.

[0067] In one embodiment, the inner wall of the gas distribution chamber is cylindrical, and a first gas distribution hole, a second gas distribution hole, and a gas inlet hole are provided on the side wall of the gas distribution chamber. The gas distribution chamber includes a first gas distribution chamber communicating with the first gas distribution hole and a second gas distribution chamber communicating with the second gas distribution hole.

[0068] In one embodiment, the aperture of the first gas distribution chamber is larger than the aperture of the second gas distribution chamber, and the gas passage area of ​​the first gas distribution hole is larger than the gas passage area of ​​the second gas distribution hole.

[0069] In one embodiment, an adjusting shaft is rotatably inserted through the gas distribution chamber.

[0070] In one embodiment, a gas regulator includes a first gas regulating portion and a second gas regulating portion disposed on a portion of the outer peripheral wall of the regulating shaft. The first gas regulating portion is disposed within the first gas distribution cavity and has a first arc-shaped outer wall surface adapted to the inner wall of the first gas distribution cavity. The second gas regulating portion is disposed within the second gas distribution cavity and has a second arc-shaped outer wall surface adapted to the inner wall of the second gas distribution cavity.

[0071] In one embodiment, the first gas regulating part and the second gas regulating part are disposed outside the gas inlet, so that the gas inlet is in a normally open state.

[0072] In one embodiment, when the adjusting shaft rotates within a first angle range, the first gas adjusting part fully or partially opens the first gas distribution hole, and the second gas adjusting part fully blocks the second gas distribution hole.

[0073] In one embodiment, when the adjusting shaft rotates within a second angle range, the first gas adjusting part completely blocks the first gas distribution hole, and the second gas adjusting part fully or partially opens the second gas distribution hole.

[0074] This application also proposes a gas appliance that includes a premixer as described above.

[0075] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0076] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0077] Figure 1 is a structural schematic diagram of an embodiment of the premixer provided in this application;

[0078] Figure 2 is an exploded view of the structure in Figure 1;

[0079] Figure 3 is a cross-sectional view of the air conditioning unit and gas conditioning unit in Figure 1 at 0 degrees in the first angular range.

[0080] Figure 4 is a structural cross-sectional view of the air conditioning component and gas conditioning component in Figure 1 at 0 degrees in the first angular range from another perspective.

[0081] Figure 5 is a structural schematic diagram of the structure in Figure 4 from another perspective;

[0082] Figure 6 is a cross-sectional view of the air conditioning unit and gas conditioning unit in Figure 1 at 90 degrees in the first angular range.

[0083] Figure 7 is a structural cross-sectional view of the air conditioning component and gas conditioning component in Figure 1 at 90 degrees in the first angular range from another perspective.

[0084] Figure 8 is a structural schematic diagram of the structure in Figure 7 from another perspective;

[0085] Figure 9 is a partial structural schematic diagram of an embodiment of the premixer of this application;

[0086] Figure 10 is an exploded view of the structure in Figure 9;

[0087] Figure 11 is a schematic diagram of the gas distribution component in Figure 10;

[0088] Figure 12 is a structural schematic diagram of part of the structure in Figure 10;

[0089] Figure 13 is a structural schematic diagram of the structure in Figure 12 from another perspective;

[0090] Figure 14 is a schematic diagram of the first slot and the second slot of the first air supply slot in Figure 13;

[0091] Figure 15 is a structural schematic diagram of the structure in Figure 13 from another perspective;

[0092] Figure 16 is a schematic diagram of the third and fourth slots of the second air supply slot in Figure 15;

[0093] Figure 17 is a schematic diagram of the Venturi tube in Figure 2;

[0094] Figure 18 is a cross-sectional view of the structure in Figure 17;

[0095] Figure 19 is a cross-sectional view of an embodiment of the gas distribution component of this application;

[0096] Figure 20 is a structural schematic diagram of an embodiment of the gas distribution component of this application;

[0097] Figure 21 is a cross-sectional view of the gas distribution component in Figure 20.

[0098] Reference numerals: 10. Premixer; 100. Premixer body; 110. Gas passage; 111. Gas equalization chamber; 112. Corner; 120. Air passage; 130. Mixing passage; 140. Base; 150. Cover plate; 160. Regulator; 170. Air conditioning component; 200. Gas distribution component; 201. First side wall; 202. Second side wall; 203. Third side wall; 204. Fourth side wall; 210. First gas distribution hole; 220. Second gas distribution hole; 230. Gas distribution chamber; 231. First gas distribution chamber; 232. Second gas distribution chamber; 240. Gas inlet; 250. First mounting hole; 260. Second mounting hole; 300. Adjusting shaft; 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 shielding section; 460. Second gas shielding section; 500. Venturi tube; 510. Venturi passage; 520. Air inlet; 530. Gas injection inlet; 540. Mixed gas outlet; 550. First pipe section; 551. Converging section; 552. Transition section; 560. Second pipe section; 570. Connecting part; 600. First seal; 700. Second seal.

[0099] The realization of the purpose, functional features and advantages of this application 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 this application 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 this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0101] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators 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 indicators will also change accordingly.

[0102] Furthermore, if the embodiments of this application 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. Therefore, 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 that simultaneously satisfies A and B. 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 in this application.

[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, this application 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'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 refer to Figures 1 to 8. 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. The gas distributor 200 is disposed within the gas passage 110 and has a gas distribution chamber 230, a gas inlet 240, a first gas distribution hole 210, and a second gas distribution hole 220 communicating with the gas distribution chamber 230. The gas distribution chamber 230 includes a first gas distribution chamber 231 communicating with the first gas distribution hole 210 and a second gas distribution chamber 232 communicating with the second gas distribution hole 220. The diameter of the first gas distribution chamber 231 is larger than the diameter of the second gas distribution chamber 232, and the gas passage area of ​​the first gas distribution hole 210 is larger than the gas passage area of ​​the second gas distribution hole 220. The gas passage area is shown in Figures 19 to 21; the adjusting shaft 300 is rotatably disposed in the gas distribution chamber 230; the gas regulating component 400 includes a first gas regulating part 410 and a second gas regulating part 420 disposed on the adjusting shaft 300, the first gas regulating part 410 is rotatably disposed in the first gas distribution chamber 231, and the second gas regulating part 420 is rotatably disposed in the second gas distribution chamber 232; when the adjusting shaft 300 rotates within a first angle range, the first gas regulating part 410 fully or partially opens the first gas distribution hole 210, and the second gas regulating part 420 fully blocks the second gas distribution hole 220; when the adjusting shaft 300 rotates within a second angle range, the first gas regulating part 410 fully blocks the first gas distribution hole 210, and the second gas regulating part 420 fully or partially opens 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 gas distribution chamber 230 includes a first gas distribution chamber 231 connected to the first gas distribution hole 210 and a second gas distribution chamber 232 connected to the second gas distribution hole 220. The diameter of the first gas distribution chamber 231 is larger than the diameter of the second gas distribution chamber 232, and the gas passage area of ​​the first gas distribution hole 210 is larger than the gas passage area of ​​the second gas distribution hole 220. This arrangement means that the first gas distribution chamber 231 and the first gas distribution hole 210 are suitable for supplying the first gas, and the second gas distribution chamber 232 and the second gas distribution hole 220 are suitable for supplying the second gas. The first gas and the second gas can be two gases with different calorific values. In this process, the calorific value of the first gas can be less than that of the second gas, and the ratio of the calorific value of the first gas to that of the second gas is Q1. The ratio of the gas passage area of ​​the second gas distribution hole 220 to that of the first gas distribution hole 210 is S1. Since the aperture of the first gas distribution chamber 231 and the gas passage area of ​​the first gas distribution hole 210 are both relatively large, while the aperture of the second gas distribution chamber 232 and the gas passage area of ​​the second gas distribution hole 220 are both relatively small, Q1 can be equal to or close to S1. That is, the product of the calorific value of the first gas and the gas passage area of ​​the first gas distribution hole 210 is the same as or close to the product of the calorific value of the second gas and the gas passage area of ​​the second gas distribution hole 220. This ensures that the ratio of the first gas passing through the first gas distribution hole 210 or the second gas passing through the second gas distribution hole 220 to air is equal to or close to that of the first gas. In other words, it ensures that the air-fuel ratio of the first gas or the second gas passing through the premixer 10 can be maintained within a good range, so that both the first gas and the second gas have high combustion efficiency. The air-fuel ratio of the premixer 10 in this solution has a good range, which has been calculated and tested during the product design process. The assembled premixer 10 has a good range to ensure high combustion efficiency of gas when applied to gas equipment.

[0109] The first gas distribution chamber 231 can be cylindrical, and the second gas distribution chamber 232 can also be cylindrical, including but not limited to a straight cylindrical shape. The shapes of the first gas distribution hole 210 and the second gas distribution hole 220 are not limited, for example, but not limited to: circular, square, T-shaped, irregular shapes, etc., and can also be composed of multiple small holes; specific details are not limited here. The first gas distribution chamber 231 and the second gas distribution chamber 232 can be an integral chamber, that is, the first gas distribution chamber 231 and the second gas distribution chamber 232 are integrally connected to form a single-chamber structure, and there is no partition separating them. Of course, the first gas distribution chamber 231 and the second gas distribution chamber 232 can be two chambers, which can be connected or not connected. For example, in one embodiment, the first gas distribution chamber 231 and the second gas distribution chamber 232 are connected by a channel, wherein the channel can be formed by a pipe or by a through hole in a partition structure. In other words, the first gas distribution chamber 231 and the second gas distribution chamber 232 are two separate chambers, and they can be connected by a pipe; or, a partition structure is provided between the first gas distribution chamber 231 and the second gas distribution chamber 232, and the partition structure has a through hole, through which the first gas distribution chamber 231 and the second gas distribution chamber 232 are connected. For example, in another embodiment, the first gas distribution chamber 231 and the second gas distribution chamber 232 are separated and do not communicate with each other along the axial direction of the adjusting shaft 300. That is, the first gas distribution chamber 231 and the second gas distribution chamber 232 are two separate chambers, and a partition structure is provided between them. Along the axial direction of the adjusting shaft 300, this partition structure completely isolates the first gas distribution chamber 231 and the second gas distribution chamber 232, and there is no fluid exchange of gas between them along the axial direction of the adjusting shaft 300.

[0110] The first gas regulating unit 410 opens the first gas distribution hole 210, indicating that the blocked first gas distribution hole 210 is opened or cleared, so that gas can flow through the first gas distribution hole 210; the second gas regulating unit 420 opens the second gas distribution hole 220, indicating that the blocked second gas distribution hole 220 is opened or cleared, so that gas can flow through the second gas distribution hole 220.

[0111] In the technical solution of this application, the premixer 10 includes a premixer body 100, a gas distribution component 200, an adjustment shaft 300, and a gas adjustment component 400. The gas distribution chamber 230 includes a first gas distribution chamber 231 and a second gas distribution chamber 232. The first gas distribution chamber 231 is connected to a first gas distribution hole 210, and the second gas distribution chamber 232 is connected to a second gas distribution hole 220. The diameter of the first gas distribution chamber 231 is larger than the diameter of the second gas distribution chamber 232, and the gas passage area of ​​the first gas distribution hole 210 is larger than the gas passage area of ​​the second gas distribution hole 220, such that the first gas distribution hole 210 and the second gas distribution hole 220... The distribution orifice 220 allows for the smooth passage of gases with different calorific values, facilitating the distribution of two different gases. It also ensures that the air-fuel ratio of the two gases with different calorific values ​​is close to or the same, thereby maintaining the air-fuel ratio of the two different gases passing through the premixer 10 within a favorable range. Furthermore, the gas regulating component 400 rotates synchronously with the regulating shaft 300. The gas regulating component 400 includes a first gas regulating part 410 and a second gas regulating part 420 disposed on the regulating shaft 300. When the regulating shaft 300 rotates within a first angular range, the first gas regulating part 410 fully or partially opens the first gas distribution orifice 210, allowing the second gas distribution orifice to pass through smoothly. When the adjusting part 420 completely blocks the second gas distribution hole 220, and the adjusting shaft 300 rotates within the second angle range, the first gas adjusting part 410 completely blocks the first gas distribution hole 210, and the second gas adjusting part 420 fully or partially opens the second gas distribution hole 220. That is, the first gas adjusting part 410 adjusts the gas passage area of ​​the first gas distribution hole 210, and the second gas adjusting part 420 adjusts the gas passage area of ​​the second gas distribution hole 220. Furthermore, the first and second gas adjusting parts 410 and 420 rotate synchronously with the adjusting shaft 300, thus achieving the rotation of one adjusting shaft 300. The first gas regulating unit 410 and the second gas regulating unit 420 rotate synchronously to supply the switching between two different gases. The curve of the first gas regulating unit 410 adjusting the gas passage area of ​​the first gas distribution hole 210 is not exactly the same as the curve of the second gas regulating unit 420 adjusting the gas passage area of ​​the second gas distribution hole 220, so as to adapt to the needs of different gas loads. This increases the flexibility of the gas regulating component 400, so that the premixer 10 of this application can 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.

[0112] Please refer to Figures 19 to 21. In one embodiment, the opening width and opening height of the first gas distribution hole 210 define the gas passage area of ​​the first gas distribution hole 210, and the opening width and opening height of the second gas distribution hole 220 define the gas passage area of ​​the second gas distribution hole 220. The opening width of the first gas distribution hole 210 is greater than the opening width of the second gas distribution hole 220, and the opening height of the first gas distribution hole 210 is greater than the opening height of the second gas distribution hole 220.

[0113] For ease of explanation, as shown in Figure 20, the X direction represents the width direction of the opening, and the Z direction represents the height direction of the opening. As shown in Figures 20 and 21, the opening width W1 and opening height of the first gas distribution hole 210 are both greater than the opening width W2 and opening height of the second gas distribution hole 220. Furthermore, the gas passage area of ​​the first gas distribution hole 210 is greater than that of the second gas distribution hole 220. If the opening width W2 of the second gas distribution hole 220 is too wide (e.g., W2 is greater than W1), the opening height of the second gas distribution hole 220 will be too low, resulting in an excessively narrow opening gap. Such a narrow opening gap is difficult to process and can easily cause blockages and affect the gas flow rate. This solution creates a difference by limiting the opening width W2 and opening height of the second gas distribution hole 220 to be smaller than those of the first gas distribution hole 210, thereby improving the processing difficulty of the gas distribution component 200 and enhancing product reliability.

[0114] In one embodiment, the first gas distribution hole 210 and the second gas distribution hole 220 are both located on the first side of the gas distribution component 200 and arranged along the axial direction of the adjusting shaft 300. The projection of the outline of the air inlet end of the first gas distribution hole 210 onto the radial section of the adjusting shaft 300 forms a first arc; the projection of the outline of the air inlet end of the second gas distribution hole 220 onto the radial section of the adjusting shaft 300 forms a second arc. The line connecting the axis of the adjusting shaft 300 and the two ends of the first arc forms a first included angle, and the line connecting the axis of the adjusting shaft 300 and the two ends of the second arc forms a second included angle. The first included angle and the second included angle coincide.

[0115] As shown in Figures 20 and 21, the opening width of the first gas distribution hole 210 is W1, and the opening width of the second gas distribution hole 220 is W2; the first arc is L1, and the endpoints of the first arc are A1 and A2; the axis of the adjusting shaft 300 is O, and the lines connecting the axis of the adjusting shaft 300 to the two ends of the first arc are OA1 and OA2, with OA1 and OA2 forming a first included angle α; the second arc is L2, and the endpoints of the second arc are B1 and B2; the axis of the adjusting shaft 300 is O, and the lines connecting the axis of the adjusting shaft 300 to the two ends of the second arc are OB1 and OB2, with OB1 and OB2 forming a second included angle β. In this scheme, OB1 coincides with OA1, and OB2 coincides with OA2, so that the first included angle α coincides with the second included angle β. That is, the opening angle of the first gas distribution hole 210 relative to the axis of the adjusting shaft 300 is the same as the opening angle of the second gas distribution hole 220 relative to the axis of the adjusting shaft 300. This makes it convenient for the second gas distribution hole 220 to be completely blocked when the first gas adjusting part 410 fully or partially opens the first gas distribution hole 210, and also convenient for the second gas adjusting part 420 to be fully or partially open the second gas distribution hole 220 when the first gas adjusting part 410 fully blocks the first gas distribution hole 210. In other words, it is convenient to realize that one adjusting shaft 300 drives the first gas adjusting part 410 and the second gas adjusting part 420 to rotate synchronously for switching between two different gases. The premixer 10 in this embodiment has a simple structure and is easy to realize the function of switching between two different gases with one shaft and two controls.

[0116] Furthermore, the specific angles of the first included angle α and the second included angle β are not limited. In this embodiment, the size of the first included angle and the second included angle can be 60 degrees to 90 degrees, such as 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, 85 degrees, 90 degrees, etc.

[0117] Please refer to Figures 1 to 8. 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 and a second gas distribution hole 220 respectively communicating with the gas passage 110. 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... The gas regulator 400 is rotatably disposed within the gas passage 110; the gas regulator 400 is disposed on the regulating shaft 300 and located within the gas passage 110. The gas regulator 400 can rotate synchronously with the regulating shaft 300. The gas regulator 400 is configured to fully or partially open or block the first gas distribution hole 210 and / or the second gas distribution hole 220 by rotation, so as to adjust the gas passage area of ​​the opened first gas distribution hole 210 and / or the second gas distribution hole 220, thereby adjusting the amount of gas flowing through the first gas distribution hole 210 and / or adjusting the amount of gas flowing through the second gas distribution hole 220.

[0118] 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.

[0119] 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.

[0120] 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. The types of gas are not limited, for example but not limited to: the first gas distribution hole 210 is used to supply natural gas and the second gas distribution hole 220 is used to supply liquefied petroleum gas; or, the first gas distribution hole 210 is used to supply liquefied petroleum gas and the second gas distribution hole 220 is used to supply natural gas. The specific arrangement can be determined according to needs.

[0121] 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.

[0122] 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 adjusting the amount of gas flowing through the first gas distribution hole 210 and / or adjusting the amount of gas flowing through the second gas distribution hole 220 by the gas regulator 400, the switching between two different gases can be achieved, so that the 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 curve of the gas regulator 400 adjusting the gas passage area of ​​the second gas distribution hole 220, so as to adapt to different gases.

[0123] 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.

[0124] It should be noted that in this application, the gas regulator 400 blocking the first gas distribution hole 210 means that the gas regulator 400 obstructs, blocks, or covers the first gas distribution hole 210 to prevent gas from passing through the first gas distribution hole 210 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 to say, the meaning of blocking in this application is different from the meaning of sealing. Similarly, in this application, the gas regulator 400 blocking the second gas distribution hole 220 means that the gas regulator 400 obstructs, blocks, or covers the second gas distribution hole 220 to prevent gas from passing through the second gas distribution hole 220 as much as possible.

[0125] 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.

[0126] 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 / or the second gas distribution hole 220, that is, it can adjust the gas intake of the first gas distribution hole 210 and / or the gas intake of the second gas distribution hole 220.

[0127] When the gas regulator 400 rotates synchronously with the regulator shaft 300, it can open or close only the first gas distribution hole 210, or only the second gas distribution hole 220, or simultaneously adjust the first gas distribution hole 210 and the second gas distribution hole 220, thereby adjusting the gas flow area of ​​the opened first gas distribution hole 210 and / or second gas distribution hole 220, that is, adjusting the gas flow rate of the corresponding gas flow area. This gives the present application multiple adjustment methods, and the premixer 10 has good applicability to meet the needs of different gases and gas flow rates.

[0128] In the technical solution of this application, the premixer 10 includes a premixer body 100, a gas distributor 200, an adjusting shaft 300, and a gas regulator 400. The gas distributor 200 is provided with a first gas distribution hole 210 and a second gas distribution hole 220 respectively connected to the gas channel 110. The patterns formed by the first gas distribution hole 210 and the second gas distribution hole 220 are not congruent, so that the patterns formed by the first gas distribution hole 210 and the second gas distribution hole 220 cannot completely overlap. The gas regulator 400 is disposed on the adjusting shaft 300 and located in the gas channel 110. The gas regulator 400 can rotate synchronously with the adjusting shaft 300. The gas regulator 400 is configured to fully or partially open or block the first gas distribution hole 210 and / or the second gas distribution hole 220 by rotation, so as to adjust the gas passage area of ​​the opened first gas distribution hole 210 and / or the second gas distribution hole 220, and adjust the gas flow through the first gas distribution hole 210. The gas flow rate and / or the gas flow rate through the second gas distribution hole 220 are adjusted. This configuration allows two different types of gas to pass through the first gas distribution hole 210 and the second gas distribution hole 220, and the patterns formed by the first and second gas distribution holes 210 and 220 do not completely overlap. By adjusting the gas flow rate through the first gas distribution hole 210 and / or the gas flow rate through the second gas distribution hole 220 using the gas regulator 400, the switching between the two different types of gas can be achieved. Furthermore, the curves of the gas regulator 400 adjusting the air passage area of ​​the first gas distribution hole 210 and the second gas distribution hole 220 are not exactly the same, adapting to different gas load requirements and increasing the flexibility of the gas regulator 400. This allows the premixer 10 of this application to be used for switching between different gas sources, meeting the needs of different gas source regions. The premixer 10 of this application has good applicability and can be widely used.

[0129] In one embodiment, the gas regulator 400 is configured to selectively open one of the first gas distribution hole 210 and the second gas distribution hole 220, either fully or partially, by rotation, and to completely block the other of the first gas distribution hole 210 and the second gas distribution hole 220, so as to adjust the gas flow area of ​​the opened first gas distribution hole 210 or the second gas distribution hole 220, thereby adjusting 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.

[0130] As can be understood from the foregoing, the meaning of "blocking" in this application differs from the meaning of "sealing." Similarly, the meaning of "complete blocking" in this application differs from the meaning of "complete sealing." In this application, "opening" means complete or partial opening; while "blocking" means complete blocking, that is, preventing the passage of gas as much as possible.

[0131] In this embodiment, by rotating the gas regulating component 400, gas can selectively pass through one of the first gas distribution hole 210 and the second gas distribution hole 220, while the other is completely blocked. This adjusts the amount of gas flowing through the first gas distribution hole 210 or the second gas distribution hole 220. The first gas distribution hole 210 and the second gas distribution hole 220 are adapted to two different types of gas, thus enabling the switching between the two different types of gas.

[0132] In one embodiment, when the gas regulator 400 rotates within a first angular range, the gas regulator 400 fully or partially opens the first gas distribution hole 210 and fully blocks the second gas distribution hole 220; when the gas regulator 400 rotates within a second angular range, the gas regulator 400 fully or partially opens the second gas distribution hole 220 and fully blocks the first gas distribution hole 210.

[0133] It is understood that 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 an angle range other than the first angle range, such as 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.

[0134] For ease of understanding, the first gas distribution hole 210 is defined as allowing the first gas to pass through, and the second gas distribution hole 220 is defined as allowing the second gas to pass through.

[0135] 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.

[0136] 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.

[0137] When the gas regulator 400 rotates within the first angle range, it adjusts the gas passage area of ​​the first gas distribution hole 210 to regulate the amount of first gas flowing through it. At this time, because the gas regulator 400 blocks the second gas distribution hole 220, the first gas cannot flow along it. When the gas regulator 400 rotates within the second angle range, it adjusts the gas passage area of ​​the second gas distribution hole 220 to regulate the amount of second gas flowing through it. At this time, because the gas regulator 400 blocks the first gas distribution hole 210, the second gas cannot flow along it. Therefore, this solution, by rotating the gas regulator 400, enables the premixer 10 to switch between two different types of gas to meet the needs of different gas source regions, demonstrating good applicability of the premixer 10.

[0138] 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.

[0139] Please refer to Figures 2 to 10. In one embodiment, the gas distribution component 200 has a gas distribution cavity 230 and a gas inlet 240, a first gas distribution hole 210 and a second gas distribution hole 220 respectively connected to the gas distribution cavity 230. The gas regulating component 400 is rotatably disposed in the gas distribution cavity 230. The gas inlet 240 is used to communicate with an external gas source.

[0140] It is understood that the specific shape of the gas distribution chamber 230 is not limited here, as long as the gas regulator 400 can be adapted to the gas distribution chamber 230. External gas can flow into the gas distribution chamber 230 through the gas inlet 240.

[0141] 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 230 from the gas inlet hole 240, 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 230 or has a small gap, thus preventing the gas in the gas distribution chamber 230 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 230 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 230 and to accommodate assembly and manufacturing errors. The amount of gas flowing out through this small gap is minimal or negligible.

[0142] This solution involves configuring a gas distribution chamber 230, a gas inlet 240, a first gas distribution hole 210, and a second gas distribution hole 220 on the gas distribution component 200. The gas regulating component 400 rotates within the gas distribution chamber 230, allowing it to fully or partially open one of the first gas distribution holes 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.

[0143] In one embodiment, the gas regulating member 400 includes a fan-shaped baffle. In a first angular range, the fan-shaped baffle completely blocks the second gas distribution hole 220; in a second angular range, the fan-shaped baffle completely blocks the first gas distribution hole 210.

[0144] It is understood that the structural shape of the fan-shaped baffle is not limited, for example, but not limited to: the fan-shaped baffle can be in the form of a sheet, such as a fan-shaped baffle plate; or, the fan-shaped baffle can be in the form of a block, such as a fan-shaped baffle block. The number of fan-shaped baffle plates or fan-shaped baffles is also not limited, and can be set according to specific needs. The fan-shaped baffle has an arc-shaped outer wall surface. In the first angle range, the arc-shaped outer wall surface of the fan-shaped baffle completely covers the second gas distribution hole 220; in the second angle range, the arc-shaped outer wall surface of the fan-shaped baffle completely covers the first gas distribution hole 210. With this setting, the structure of the fan-shaped baffle is simple, easy to process and manufacture, and the way to adjust the fan-shaped baffle to cover the second gas distribution hole 220 or the first gas distribution hole 210 is simple, which helps to simplify the structure of the premixer 10.

[0145] In one embodiment, the adjusting shaft 300 is located outside the first gas distribution hole 210 and the second gas distribution hole 220, that is, the adjusting shaft 300 will not obstruct the gas flowing through the first gas distribution hole 210 and / or the second gas distribution hole 220, so that the gas can flow smoothly into the mixing channel 130 of the premixer body 100 through the first gas distribution hole 210 and / or the second gas distribution hole 220.

[0146] Please refer to Figures 3 to 10. In one embodiment, the gas regulator 400 includes a first gas regulator 410 and a second gas regulator 420 disposed on an adjusting shaft 300. The first gas regulator 410 and the second gas regulator 420 can rotate synchronously with the adjusting shaft 300. When the adjusting shaft 300 rotates within a first angle range, the first gas regulator 410 fully or partially opens the first gas distribution hole 210, and the second gas regulator 420 completely blocks the second gas distribution hole 220 (as shown in Figures 3 to 8). When the adjusting shaft 300 rotates within a second angle range, the first gas regulator 410 completely blocks the first gas distribution hole 210, and the second gas regulator 420 fully or partially opens the first gas distribution hole 210.

[0147] 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.

[0148] 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.

[0149] This configuration ensures that the first gas regulating part 410 and the second gas regulating part 420 rotate with the regulating shaft 300 without affecting each other. The first gas regulating part 410 will not affect the gas flowing out from the outlet end of the first gas distribution hole 210, and the second gas regulating part 420 will not affect the gas flowing out from the outlet end of the second gas distribution hole 220. This helps to improve 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.

[0150] Please refer to Figures 3 to 12. In one embodiment, the gas distribution component 200 has a gas distribution cavity 230 and a gas inlet 240, a first gas distribution hole 210, and a second gas distribution hole 220 respectively connected to the gas distribution cavity 230. The gas inlet 240 is used to communicate with an external gas source. A first gas regulating part 410 is rotatably disposed in the gas distribution cavity 230 to open or block the first gas distribution hole 210. A second gas regulating part 420 is rotatably disposed in the gas distribution cavity 230 to open or block the second gas distribution hole 220.

[0151] The specific shape of the gas distribution chamber 230 is not limited here, as long as the gas regulator 400 can be adapted to the gas distribution chamber 230. External gas can flow into the gas distribution chamber 230 through the gas inlet 240. The first gas regulator 410 and the second gas regulator 420 rotate synchronously with the regulator 300 in the gas distribution chamber 230 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 accordingly. This solution is simple and easy to implement when switching between different gas types, which helps to simplify the structure of the premixer 10.

[0152] In one embodiment, the first gas distribution hole 210 and the second gas distribution hole 220 are both located on the first side of the gas distribution member 200; the gas inlet hole 240 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.

[0153] It is understandable that the gas inlet 240, the first gas distribution hole 210, and the second gas distribution hole 220 are located on different sides of the gas distribution member 200, so that gas flows in from one side of the gas distribution member 200 and is discharged from the other side of the gas distribution member 200, which helps to improve the smoothness of gas flow.

[0154] In one embodiment, the number of gas inlet ports 240 is one or more. That is, the number of gas inlet ports 240 is not limited and can be set as needed.

[0155] In one embodiment, there are multiple gas inlet holes 240, and any two gas inlet holes 240 have the same area, or at least two gas inlet holes 240 have different areas. This arrangement means that the multiple gas inlet holes 240 are spaced apart, and the areas of the multiple gas inlet holes 240 can be at least partially the same or at least partially different; the specific arrangement is not limited here.

[0156] 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 240 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 240.

[0157] 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 240, at least part of the gas inlet hole 240 is located between the first gas regulating part 410 and the second gas regulating part 420, so that the gas flowing from the gas inlet hole 240 into the gas distribution chamber 230 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 240 into the first gas distribution hole 210 and the second gas distribution hole 220. In other words, the gas inlet hole 240, 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 230 and increase the gas flow speed.

[0158] In one embodiment, along the axial direction of the adjusting shaft 300, the gas inlet 240 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 240, and that gas can flow from the gas inlet 240 into the gas distribution chamber 230 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 230.

[0159] In one embodiment, along the axial direction of the adjusting shaft 300, the gas inlet 240, the first gas distribution hole 210, and the second gas distribution hole 220 are staggered on the gas distribution component 200. This arrangement ensures that when the first gas distribution hole 210 and the second gas distribution hole 220 rotate within the gas distribution chamber 230, they do not obstruct the gas inlet 240, keeping the gas inlet 240 normally open, thus facilitating the smooth flow of gas into the gas distribution chamber 230.

[0160] Referring to Figures 10 to 16, in 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, at least a portion of the opening of the first gas supply groove 430 faces the first gas distribution hole. 210 configuration; the opening of the second gas supply groove 440 is positioned facing 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 is positioned facing outward from the first gas distribution hole 210, and the outer peripheral wall of the first gas regulating part 410 blocks the first gas distribution hole 210; at least a portion of the opening of the second gas supply groove 440 is positioned facing the second gas distribution hole 220.

[0161] 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.

[0162] The minimum gas passage area required when the first gas is under minimum load is S1. For the first gas regulating unit 410, 0 degrees can represent the first gas regulating unit 410 at a preset initial position. This preset initial position can be the position where the first gas regulating unit 410 adjusts the gas passage area of ​​the first gas distribution hole 210 to S1. The specific shape and position of the opening of the first gas supply groove 430 are not limited.

[0163] As shown in Figures 3 to 8, in this specific embodiment, the first angle range is 0 degrees to 90 degrees. That is, when the first gas regulating part 410 rotates within the range of 0 degrees to 90 degrees, at least a portion of the opening of the first gas supply groove 430 is positioned toward the first gas distribution hole 210 to open at least a portion of the first gas distribution hole 210.

[0164] As shown in Figures 3 to 5, when the first gas regulating unit 410 is at the 0-degree position, part of the slot opening of the first gas supply groove 430 is set towards the first gas distribution hole 210, so that the first gas regulating unit 410 adjusts the gas passing area of ​​the first gas distribution hole 210 to be equal to the minimum passing 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.

[0165] As shown in Figures 6 to 8, when the first gas regulating unit 410 is at a 90-degree position, at least a portion of the opening of the first gas supply groove 430 is positioned toward the first gas distribution hole 210, so that the first gas regulating unit 410 adjusts the gas passage area of ​​the first gas distribution hole 210 to the maximum, and the first gas regulating unit 410 fully opens the first gas distribution hole 210. At this time, the premixer 10 mixes the maximum amount of the first gas.

[0166] When the first gas regulating section 410 is positioned between 0 and 90 degrees, the amount of first gas mixed by the premixer 10 is between its minimum and maximum. This setting allows for adjustment of the gas passage area of ​​the first gas distribution orifice 210, that is, adjustment of the amount of first gas flowing through the first gas distribution orifice 210.

[0167] In this embodiment, the first angle range and the second angle range do not overlap.

[0168] The minimum gas passage area required when the second gas is under minimum load is S2. For the second gas regulating unit 420, 180 degrees can represent the second gas regulating unit 420 in a preset initial position. This preset initial position can be the position where the second gas regulating unit 420 adjusts the gas passage area of ​​the second gas distribution hole 220 to S2. The specific shape and position of the slot opening of the second gas supply groove 440 are not limited.

[0169] Specifically in this embodiment, the second angle range is 180 degrees to 270 degrees. That is, when the second gas regulating part 420 rotates within the range of 180 degrees to 270 degrees, at least a portion of the opening of the second gas supply groove 440 is positioned toward the second gas distribution hole 220 to open at least a portion of the second gas distribution hole 220.

[0170] When the second gas regulating unit 420 is at the 180-degree position, part of the slot 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 be equal to the minimum passage area S2 required when the second gas is in the minimum load state. At this time, it is the minimum amount of the second gas mixed by the premixer 10.

[0171] When the second gas regulating unit 420 is at the 270-degree position, at least a portion of the opening of the second gas supply slot 440 is positioned toward 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, and the second gas regulating unit 420 fully opens the second gas distribution hole 220, which is the maximum amount of second gas mixed by the premixer 10.

[0172] When the second gas regulating section 420 is positioned between 180 and 270 degrees, the amount of second gas mixed by the premixer 10 is between its minimum and maximum. This configuration allows for adjustment of the gas passage area of ​​the second gas distribution orifice 220, thus regulating the amount of second gas flowing through it.

[0173] Please refer to Figures 12 to 14. In one embodiment, a first gas regulating part 410 is arranged around 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 240. 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 as the first gas regulating part 410 rotates.

[0174] It is understood that the shape and size of the first slot 431 and the second slot 432 are not limited, and can be specifically set according to the structure of the first gas regulating unit 410 and the needs. The dashed box on the left side of Figure 14 represents the second slot 432, and the dashed box on the right side of Figure 14 represents the first slot 431. The first slot 431 is connected to the gas inlet hole 240, so that the gas can 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, the second slot 432 is rotated to face the first gas distribution hole 210. When the first gas regulating part 410 needs to block the first gas distribution hole 210, the second slot 432 is rotated to face outward of the first gas distribution hole 210, so that the outer peripheral wall of the first gas regulating part 410 blocks the first gas distribution hole 210. This makes it easy to adjust the gas passage area of ​​the first gas distribution hole 210, which helps to simplify the structure of the premixer 10.

[0175] Referring to Figure 14, in one embodiment, the gas regulator 400 further includes a first gas blocking part 450. The first gas blocking part 450 is disposed at one end of the first gas supply groove 430 away from the first slot 431 along the axial direction of the regulating shaft 300. The first slot 431 is located between the first gas blocking part 450 and the second gas regulator 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 240.

[0176] 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.

[0177] Referring to Figures 15 and 16, in 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 240. 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.

[0178] It is understood that the shape and size of the third slot 441 and the fourth slot 442 are not limited, and can be specifically set according to the structure of the second gas regulating unit 420 and the needs. The dashed box on the left side of Figure 16 represents the third slot 441, and the dashed box on the right side of Figure 16 represents the fourth slot 442. The third slot 441 is connected to the gas inlet 240, so that the gas can flow smoothly into the second gas supply slot 440. The fourth slot 442 is provided on the outer peripheral wall of the second gas regulating part 420. When the second gas regulating part 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 part 420 needs to block the second gas distribution hole 220, the fourth slot 442 is rotated to face outward of the second gas distribution hole 220, so that the outer peripheral wall of the second gas regulating part 420 blocks the second gas distribution hole 220. This makes it easy to adjust the gas passage area of ​​the second gas distribution hole 220, which helps to simplify the structure of the premixer 10.

[0179] 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 240.

[0180] 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.

[0181] 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.

[0182] 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 setting the first vent holes, it is beneficial to improve the smoothness of the gas flow in the gas distribution chamber 230, that is, to improve the smoothness of the gas flow from the gas distribution chamber 230 through the first gas distribution hole 210.

[0183] 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.

[0184] 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 230, that is, to improve the smoothness of gas flow from the gas distribution chamber 230 through the second gas distribution hole 220.

[0185] Please refer to Figures 9 to 16. In one embodiment, the cross-section of the cavity wall of the gas distribution cavity 230 at the first gas distribution hole 210 and the second gas distribution hole 220 along the radial direction of the adjustment shaft 300 is circular; 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 cavity 230; the second gas adjustment part 420 has a second arc-shaped outer wall surface adapted to the cavity wall of the gas distribution cavity 230.

[0186] 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, thereby improving the adaptability of the first gas regulating part 410 and the second gas regulating part 420 to the gas distribution cavity.

[0187] 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.

[0188] 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.

[0189] In one embodiment, the gas distributor 200 has a first mounting hole 250 communicating with the gas distribution chamber 230. A first gas regulating part 410 and a second gas regulating part 420 are installed into the gas distribution chamber 230 through the first mounting hole 250. The opening direction of the first mounting hole 250 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 chamber 230, and eliminates the need for position adjustment after installation, thus improving structural compactness. The shape and position of the first mounting hole 250 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 chamber 230.

[0190] In one embodiment, the centerline of the first mounting hole 250 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 230 along the centerline of the first mounting hole 250, 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 230, thus ensuring that the position of the axis of the adjusting shaft 300 remains unchanged. This improves the adaptability of the assembled parts.

[0191] Please refer to Figures 9 to 11. In one embodiment, the gas distribution component 200 has a first sidewall 201 and a second sidewall 202 facing 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 circumferentially around 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 250 is provided on the first sidewall 201. A second mounting hole 260 for the regulating shaft 300 to pass through is provided on the second sidewall 202. A gas inlet hole 240 is provided on the third sidewall 203. The first gas distribution hole 210 and the second gas distribution hole 220 are both provided on the fourth sidewall 204 and are spaced apart.

[0192] 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 250 and the second mounting hole 260 are located on opposite side walls of the gas distributor 200, which facilitates the insertion of the adjusting shaft 300 through the first mounting hole 250 and its exit through the second mounting hole 260, thereby improving installation stability and convenience. The gas inlet hole 240, the first gas distribution hole 210, and the second gas distribution hole 220 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.

[0193] 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.

[0194] Please refer to 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] 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. That is, the number of first gas distribution holes 210 and second gas distribution holes 220 is not limited, and can be set as needed.

[0199] 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 also 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. This arrangement, where the multiple first gas distribution holes 210 are spaced apart, means that the areas of the multiple first gas distribution holes 210 can be at least partially the same or at least partially different. Similarly, the multiple second gas distribution holes 220 are spaced apart, and their areas can be at least partially the same or at least partially different; the specific arrangement is not limited here.

[0200] 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.

[0201] It is understood that the air passage 120 is used to supply air flow, and the size and location of the air passage 120 are not limited, but are set according to specific needs. The mixing passage 130 is used to premix the air and fuel gas flowing into it, and the size and location of the mixing passage 130 are not limited, but are set according to specific needs.

[0202] 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.

[0203] 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.

[0204] 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.

[0205] Please refer to 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 within 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.

[0206] 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] In one embodiment, both the air conditioning component 170 and the gas conditioning component 400 are mounted on the adjusting shaft 300. The air conditioning component 170 is located in the air passage 120 and is configured to adjust the air passage area of ​​the air passage 120 as the adjusting shaft 300 rotates, thereby adjusting the amount of air flowing into the mixing passage 130. The gas conditioning component 400 is located in the gas passage 110 and is configured to adjust the gas passage area of ​​the gas passage 110 as the adjusting shaft 300 rotates, thereby adjusting 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 adjusting shaft 300, thus enabling synchronous adjustment of the air passage area. The air passage area of ​​air passage 120 and the gas passage area of ​​gas passage 110 allow for simultaneous increases or decreases, ensuring that the ratio of air to gas flowing into mixing passage 130 remains within a preset range under different load conditions. This means the air-fuel ratio of premixer 10 remains optimal under different load conditions, improving the combustion efficiency of gas equipment. Furthermore, an adjusting shaft 300 drives the air conditioning component 170 and the gas conditioning component 400 to rotate synchronously, adjusting the air-fuel mixture ratio and simplifying the structure of premixer 10. Therefore, the premixer 10 proposed in this embodiment has a simple structure and ensures that the air-fuel ratio remains optimal under different load conditions, thereby improving the combustion efficiency of gas equipment.

[0211] 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.

[0212] 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.

[0213] Please refer to Figures 3 to 8. 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. The preset initial position of the air conditioning component 170 corresponds to the preset initial position of the gas conditioning component 400. The preset initial position of the gas conditioning component 400 is the position when the gas conditioning component 400 adjusts the gas passage area of ​​the first gas distribution hole 210 to S1. The preset initial position of the air conditioning component 170 is the position when 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 when it is S3 to the amount of gas flowing through the gas passage area of ​​the first gas channel 110 when it is S1 is the preset first air-fuel ratio of the premixer 10.

[0214] In other words, as shown in Figures 3 to 5, when the gas regulator 400 is at the 0-degree position, this is the minimum amount of the 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 the 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 the first premixed gas, and the minimum amount of the first premixed gas corresponds to the minimum load of the first gas.

[0215] As shown in Figures 6 to 8, 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 represents the maximum amount of air mixed by the premixer 10. When the gas regulating component 400 is at a 90-degree position, the premixer 10 mixes the maximum amount of the first gas. This maximum amount of the first gas mixed by the premixer 10, combined with the maximum amount of air mixed by the premixer 10, forms the maximum amount of the first premixed gas, which corresponds to the maximum load of the first gas. When the air conditioning component 170 is positioned between 0 and 90 degrees, the amount of air mixed by the premixer 10 is between its minimum and maximum, thus allowing for the adjustment of the air passage area of ​​the air passage 120.

[0216] 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.

[0217] 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 0 degrees in the aforementioned 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 90 degrees in the aforementioned first angle range. The position where the gas regulator 400 rotates 180 degrees from its preset initial position is the position where the gas regulator 400 adjusts the gas passage area of ​​the second gas distribution hole 220 to S2.

[0218] When the air conditioning element 170 is at the 180-degree position, it 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. In other words, when the fuel regulator 400 is at the 180-degree position, this is the minimum amount of second fuel mixed by the premixer 10; when the air conditioning element 170 is at the 180-degree position, this is the minimum amount of air mixed by the premixer 10. The minimum amount of 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 second premixed gas, which corresponds to the minimum load of the second fuel.

[0219] 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 premixer 10 mixes the maximum amount of the second gas. The maximum amount of the 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 the second premixed gas. The maximum amount of the second premixed gas corresponds to the maximum load of the second gas.

[0220] 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.

[0221] 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 230 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.

[0222] Understandably, 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 230. 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 230. 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.

[0223] 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.

[0224] 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.

[0225] 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.

[0226] As shown in Figures 3 to 5, 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 its 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 to reduce the difficulty for the premixer 10 to adjust the air intake volume.

[0227] As shown in Figures 3 to 5, in the first obstruction 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 the design value, thus determining the size of the air passage gap area S3. The first obstruction 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.

[0228] In one embodiment, the air conditioning component 170 includes an air flap, which is 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 center line of the air channel 120; a virtual plane formed by the rotation axis of the air flap and the center line of the air channel 120 is defined as a first plane; the air flap has a first state and a second state; as shown in Figures 3 to 5, in the first state, the air flap is perpendicular to the first plane; as shown in Figures 6 to 8, in the second state, the air flap is parallel to the first plane.

[0229] It is understandable that the centerline of the air passage 120 refers to an imaginary straight line passing through the center of the airflow within the air passage 120, that is, the geometric centerline traversing the air passage 120, which 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, and the air passage area of ​​the air passage 120 is at its minimum, as shown in Figures 3 to 5. In the second state, the air flap is parallel to the first plane, and the air passage area of ​​the air passage 120 is at its maximum, as shown in Figures 6 to 8.

[0230] 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, as shown in Figures 3 to 5; the position of the air flap in the second state is the position at 90 degrees, as shown in Figures 6 to 8. The definition of the first angle range as 0 to 90 degrees is as described above and will not be repeated here.

[0231] 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.

[0232] Please refer to Figures 4 and 5. In one embodiment, the gas passage 110 includes a gas equalization chamber 111. The gas outlet of the first gas distribution hole 210 and the gas outlet of the second gas distribution hole 220 are both 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.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] In 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 second gas distribution hole 220, the corner 112, and the gas injection inlet 530. Along the flow direction of the gas in the gas channel 110, the gas first flows through the first gas distribution hole 210 or the second gas distribution hole 220, and then flows through the corner 112 and the gas injection inlet 530 in sequence before flowing into the mixing channel 130. The corner 112 changes the flow direction of the gas in the gas uniform flow chamber 111, so that the gas can flow evenly through the gas injection inlet 530 and into the mixing channel 130.

[0238] In one embodiment, the first gas distribution chamber 231 and the second gas distribution chamber 232 are integrally connected single-chamber structures. This configuration means that the first gas distribution chamber 231 and the second gas distribution chamber 232 are a single chamber without any separating structure between them.

[0239] In one embodiment, the first gas distribution chamber 231 and the second gas distribution chamber 232 are connected by a channel. This configuration means that the first gas distribution chamber 231 and the second gas distribution chamber 232 are two separate chambers, and they can be connected by a pipe. Alternatively, a partition structure with through holes is provided between the first gas distribution chamber 231 and the second gas distribution chamber 232, and the partition structure is connected to the second gas distribution chamber 232 through the through holes. The channel can be formed by a pipe or by a through hole in the partition structure.

[0240] In one embodiment, the first gas distribution chamber 231 and the second gas distribution chamber 232 are separated and not connected to each other along the axial direction of the adjustment shaft 300. This arrangement means that the first gas distribution chamber 231 and the second gas distribution chamber 232 are two separate chambers, completely isolated along the axial direction of the adjustment shaft 300 by a partition structure, preventing any fluid exchange of gas between them along the axial direction of the adjustment shaft 300.

[0241] Referring to Figures 2, 17, and 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 into and to inject gas from the gas channel 110, so that the air and gas can be mixed. 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 volume control.

[0242] 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.

[0243] 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.

[0244] 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.

[0245] 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.

[0246] 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.

[0247] 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.

[0248] 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, and the gas distributor 200 has a first gas distribution hole 210 and a second gas distribution hole 220 respectively communicating with the gas passage 110. 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 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. The gas regulating component 400 is configured to selectively open, partially or completely, one of the first gas distribution hole 210 and the second gas distribution hole 220, and completely block the other, thereby adjusting the gas flow area of ​​either the opened first gas distribution hole 210 or the second gas distribution hole 220, and thus adjusting the amount of gas flowing through either the first gas distribution hole 210 or the second gas distribution hole 220. When the gas regulating component 400 rotates within a first angular range, it fully or partially opens the first gas distribution hole 210 and completely blocks the second gas distribution hole 220; when it rotates within a second angular range, it fully or partially opens the second gas distribution hole 220 and completely blocks the first gas distribution hole 210. The gas regulator 400 includes a first gas regulator 410 and a second gas regulator 420 disposed on an adjusting shaft 300. The first gas regulator 410 and the second gas regulator 420 can rotate synchronously with the adjusting shaft 300. When the adjusting shaft 300 rotates within a first angle range, the first gas regulator 410 fully or partially opens the first gas distribution hole 210, and the second gas regulator 420 fully blocks the second gas distribution hole 220. When the adjusting shaft 300 rotates within a second angle range, the first gas regulator 410 fully blocks the first gas distribution hole 210, and the second gas regulator 420 fully or partially opens the first gas distribution hole 210. The gas distribution component 200 has a gas distribution cavity 230 and a gas inlet 240, a first gas distribution hole 210 and a second gas distribution hole 220 respectively connected to the gas distribution cavity 230. The gas inlet 240 is used to communicate with an external gas source. A first gas regulating part 410 is rotatably disposed in the gas distribution cavity 230 to open or block the first gas distribution hole 210. A second gas regulating part 420 is rotatably disposed in the gas distribution cavity 230 to open or block the second gas distribution hole 220.The first gas regulating unit 410 and the regulating shaft 300 form a first gas supply groove 430, or the first gas regulating unit 410 is provided with a first gas supply groove 430; the second gas regulating unit 420 and the regulating shaft 300 form a second gas supply groove 440, or the second gas regulating unit 420 is provided with a second gas supply groove 440; when the first gas regulating unit 410 and the second gas regulating unit 420 rotate within a first angle range, at least a portion of the opening of the first gas supply groove 430 is positioned facing the first gas distribution hole 210; the second gas supply... The opening of the gas groove 440 is oriented 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 is oriented outward from the first gas distribution hole 210, and the outer peripheral wall of the first gas regulating part 410 blocks the first gas distribution hole 210; at least a portion of the opening of the second gas supply groove 440 is oriented towards 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 240. 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 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 240. 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 230 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 230. The second gas adjusting part 420 has a second arc-shaped outer wall surface that matches the wall of the gas distribution chamber 230. The first gas adjusting part 410 and the second gas adjusting part 420 are both fan-shaped in cross-section along the radial direction of the adjusting shaft 300.

[0249] 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 and the second gas distribution hole 220 are both connected to the mixing passage 130 through the gas equalization chamber 111. The gas equalization chamber 111 has 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.

[0250] This application also proposes a premixer 10, which includes a premixer body 100, an adjusting shaft 300, and a gas regulating component 400. The premixer body 100 has a gas passage 110 and a gas distribution chamber 230 disposed within the gas passage 110. The inner wall of the gas distribution chamber 230 is cylindrical, and a first gas distribution hole 210, a second gas distribution hole 220, and a gas inlet hole 240 are provided on the side wall of the gas distribution chamber 230. 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 disposed within the gas distribution chamber 230. A component 400 is disposed on a portion of the outer peripheral wall of the adjusting shaft 300. The gas adjusting component 400 has an arc-shaped outer wall surface that is adapted to the inner wall of the gas distribution chamber 230. The gas adjusting component 400 is disposed outside the gas inlet hole 240 so that the gas inlet hole 240 is in a normally open state. When the gas adjusting component 400 rotates within a first angle range, the gas adjusting component 400 fully or partially opens the first gas distribution hole 210 and fully blocks the second gas distribution hole 220. When the gas adjusting component 400 rotates within a second angle range, the gas adjusting component 400 fully or partially opens the second gas distribution hole 220 and fully blocks the first gas distribution hole 210.

[0251] 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.

[0252] In one embodiment, there is one gas regulator 400, and the first gas distribution hole 210 and the second gas distribution hole 220 are circumferentially spaced on the side wall of the gas distribution chamber 230 around the regulating shaft 300. With this configuration, even with only one gas regulator 400, the premixer 10 can switch between two different types of gas to meet the needs of different gas source regions. The premixer 10 of this application has good applicability and can be widely used.

[0253] In one embodiment, the gas regulating component 400 is a fan-shaped baffle or a fan-shaped baffle block. The use of a fan-shaped baffle or baffle block simplifies the component structure and reduces manufacturing difficulty.

[0254] In one embodiment, the gas regulator 400 includes a first gas regulator 410 and a second gas regulator 420 spaced apart along the axial direction of the regulator shaft 300. The first gas distribution hole 210 and the second gas distribution hole 220 are spaced apart on the sidewall of the gas distribution cavity 230 along the axial direction of the regulator shaft 300. When the regulator shaft 300 rotates within a first angle range, the first gas regulator 410 fully or partially opens the first gas distribution hole 210, and the second gas regulator 420 completely blocks the second gas distribution hole 220. When the regulator shaft 300 rotates within a second angle range, the first gas regulator 410 completely blocks the first gas distribution hole 210, and the second gas regulator 420 fully or partially opens the first gas distribution hole 210.

[0255] It is understandable that when the adjusting shaft 300 rotates within the first angle range, the first gas adjusting part 410 adjusts the gas passage area of ​​the first gas distribution hole 210 to adjust the amount of first gas flowing through the first gas distribution hole 210. At this time, because the second gas adjusting part 420 completely blocks the second gas distribution hole 220, the first gas cannot flow along the second gas distribution hole 220.

[0256] When the adjusting shaft 300 rotates within the second angle range, the second gas adjusting part 420 adjusts the gas passage area of ​​the second gas distribution hole 220 to regulate the amount of second gas flowing through the second gas distribution hole 220. At this time, because the first gas adjusting part 410 completely blocks the first gas distribution hole 210, the second gas cannot flow along the first gas distribution hole 210. Therefore, this solution, by having the adjusting shaft 300 drive the first gas adjusting part 410 and the second gas adjusting part 420 to rotate synchronously, enables the premixer 10 to switch between two different types of gas to meet the needs of different gas source regions, thus demonstrating the good applicability of the premixer 10.

[0257] In one embodiment of this application, the premixer 10 includes a premixer body 100, an adjusting shaft 300, and a gas regulating component 400. The premixer body 100 has a gas passage 110 and a gas distribution chamber 230 disposed within the gas passage 110. The inner wall of the gas distribution chamber 230 is cylindrical. A first gas distribution hole 210, a second gas distribution hole 220, and a gas inlet hole 240 are provided on the side wall of the gas distribution chamber 230. The gas distribution chamber 230 includes a first gas distribution chamber 231 communicating with the first gas distribution hole 210 and a second gas distribution chamber 232 communicating with the second gas distribution hole 220. The diameter of the first gas distribution chamber 231 is larger than the diameter of the second gas distribution chamber 232, and the gas passage area of ​​the first gas distribution hole 210 is larger than the gas passage area of ​​the second gas distribution hole 220. The adjusting shaft 300 is rotatably disposed through the gas distribution chamber 230. The gas regulating component 400 includes a portion of the outer peripheral wall of the adjusting shaft 300. The system comprises a first gas regulating part 410 and a second gas regulating part 420. The first gas regulating part 410 is disposed within the first gas distribution cavity 231 and has a first arc-shaped outer wall surface adapted to the inner wall of the first gas distribution cavity 231. The second gas regulating part 420 is disposed within the second gas distribution cavity 232 and has a second arc-shaped outer wall surface adapted to the inner wall of the second gas distribution cavity 232. The first gas regulating part 410 and the second gas regulating part 420 are disposed outside the gas inlet hole 240 so that the gas inlet hole 240 is in a normally open state. When the regulating shaft 300 rotates within a first angle range, the first gas regulating part 410 fully or partially opens the first gas distribution hole 210, and the second gas regulating part 420 fully blocks the second gas distribution hole 220. When the regulating shaft 300 rotates within a second angle range, the first gas regulating part 410 fully blocks the first gas distribution hole 210, and the second gas regulating part 420 fully or partially opens the second gas distribution hole 220.

[0258] It is understood that, compared with the aforementioned embodiments, the premixer 10 in this embodiment may not have the gas distribution component 200 in the aforementioned embodiments, and the gas distribution component 200 in the aforementioned embodiments may be an integral structure with the premixer body 100. Of course, the premixer body 100 in this embodiment may also include the gas distribution component 200 in the aforementioned embodiments, and the specific design can be customized as needed, without limitation here. 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 aforementioned embodiments, and will not be repeated here.

[0259] This application also proposes a gas device, which includes the premixer 10 as described above. The specific structure of the premixer 10 is as described in the above embodiments. Since this 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.

[0260] 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.

[0261] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A premixer, wherein, The premixer includes: The premixer body has a gas passage; A gas distribution component is disposed within the gas channel. The gas distribution component has a gas distribution cavity and a gas inlet, a first gas distribution hole, and a second gas distribution hole communicating with the gas distribution cavity. The gas distribution cavity includes a first gas distribution cavity communicating with the first gas distribution hole and a second gas distribution cavity communicating with the second gas distribution hole. The diameter of the first gas distribution cavity is larger than the diameter of the second gas distribution cavity, and the gas passage area of ​​the first gas distribution hole is larger than the gas passage area of ​​the second gas distribution hole. An adjusting shaft is rotatably inserted into the gas distribution chamber; A gas regulating component includes a first gas regulating part and a second gas regulating part disposed on the regulating shaft. The first gas regulating part is rotatably disposed in the first gas distribution chamber, and the second gas regulating part is rotatably disposed in the second 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, and the second gas adjusting part completely blocks the second gas distribution hole; When the adjusting shaft rotates within the second angle range, the first gas adjusting part completely blocks the first gas distribution hole, and the second gas adjusting part fully or partially opens the second gas distribution hole.

2. The premixer as claimed in claim 1, wherein, The opening width and opening height of the first gas distribution hole limit the gas passage area of ​​the first gas distribution hole, and the opening width and opening height of the second gas distribution hole limit the gas passage area of ​​the second gas distribution hole. The opening width of the first gas distribution hole is greater than the opening width of the second gas distribution hole, and the opening height of the first gas distribution hole is greater than the opening height of the second gas distribution hole.

3. The premixer as described in claim 1 or 2, wherein, Both the first gas distribution hole and the second gas distribution hole are located on the first side of the gas distribution component and are arranged along the axial direction of the adjusting shaft. The projection of the outline of the air inlet end of the first gas distribution hole onto the radial section of the adjusting shaft forms a first arc. The projection of the outline of the air inlet end of the second gas distribution hole onto the radial section of the adjusting shaft forms a second arc. The line connecting the axis of the adjusting shaft and the two ends of the first arc forms a first angle, and the line connecting the axis of the adjusting shaft and the two ends of the second arc forms a second angle. The first angle and the second angle coincide.

4. The premixer according to any one of claims 1 to 3, wherein, Both the first gas distribution hole and the second gas distribution hole are 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 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, according to the axial projection of the gas inlet hole. And / or, the first angle range and the second angle range do not overlap.

5. The premixer according to any one of claims 1 to 4, wherein, 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 a first angle range, at least a portion of the opening of the first gas supply groove is positioned toward the first gas distribution hole; the opening of the second gas supply groove is positioned toward the direction outside 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 direction outside the first gas distribution hole, and the outer peripheral wall of the first gas regulating unit blocks the first gas distribution hole; at least a portion of the opening of the second gas supply groove is oriented towards the second gas distribution hole.

6. The premixer as claimed in claim 5, wherein, The first gas regulating part is arranged around a portion of the outer peripheral wall of the regulating shaft and surrounds the remaining outer peripheral wall of the regulating shaft to form 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 as the first gas regulating part rotates.

7. The premixer as claimed in claim 5, wherein, 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.

8. The premixer according to any one of claims 1 to 7, wherein, Both the first gas distribution cavity and the second gas distribution cavity have circular cross-sections along the radial direction of the adjustment axis. The first gas adjustment part has a first arc-shaped outer wall surface that matches the cavity wall of the first gas distribution cavity, and the second gas adjustment part has a second arc-shaped outer wall surface that matches the cavity wall of the second gas distribution cavity.

9. The premixer of claim 8, wherein, 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.

10. The premixer according to any one of claims 1 to 9, wherein, 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.

11. The premixer of claim 10, wherein, 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 hole is provided on the third sidewall, and the first gas distribution hole and the second gas distribution hole are both provided on the fourth sidewall and are spaced apart.

12. The premixer according to any one of claims 1 to 11, wherein, 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 element are an integral structure.

13. The premixer according to any one of claims 1 to 12, wherein, 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.

14. The premixer of claim 13, wherein, The gas passage includes a gas equalization chamber. The outlet ends of the first gas distribution hole and the second gas distribution hole are both 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.

15. The premixer of claim 14, wherein, 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.

16. The premixer of claim 15, wherein, 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.

17. The premixer according to any one of claims 1 to 16, wherein, The first gas distribution chamber and the second gas distribution chamber are a single-chamber structure that is integrally connected; Alternatively, the first gas distribution chamber and the second gas distribution chamber are connected by a channel; Alternatively, the first gas distribution chamber and the second gas distribution chamber are separated and not connected to each other along the axial direction of the adjustment shaft.

18. The premixer according to any one of claims 1 to 17, wherein, 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.

19. The premixer of claim 18, wherein, 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.

20. A premixer, wherein, The premixer includes: 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, and a gas inlet hole are provided on the side wall of the gas distribution chamber. The gas distribution chamber includes a first gas distribution chamber communicating with the first gas distribution hole and a second gas distribution chamber communicating with the second gas distribution hole. The diameter of the first gas distribution chamber is larger than the diameter of the second gas distribution chamber, and the gas passage area of ​​the first gas distribution hole is larger than the gas passage area of ​​the second gas distribution hole. An adjusting shaft is rotatably inserted into the gas distribution chamber; A gas regulating component includes a first gas regulating part and a second gas regulating part disposed on a portion of the outer peripheral wall of the regulating shaft. The first gas regulating part is disposed within the first gas distribution cavity and has a first arc-shaped outer wall surface adapted to the inner wall of the first gas distribution cavity. The second gas regulating part is disposed within the second gas distribution cavity and has a second arc-shaped outer wall surface adapted to the inner wall of the second gas distribution cavity. The first and second gas regulating parts are disposed outside the gas inlet hole so that the gas inlet hole is in a normally open state. When the adjusting shaft rotates within the first angle range, the first gas adjusting part fully or partially opens the first gas distribution hole, and the second gas adjusting part completely blocks the second gas distribution hole; When the adjusting shaft rotates within the second angle range, the first gas adjusting part completely blocks the first gas distribution hole, and the second gas adjusting part fully or partially opens the second gas distribution hole.

21. A gas-fired device, wherein, The gas equipment includes a premixer as described in any one of claims 1 to 20.

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