Premixers and gas installations

Abstract

The utility model discloses a kind of premixers and gas equipment. Premixer includes premixer main body and air adjusting part, premixer main body has air passage;Air adjusting part is movably arranged in the air passage, the air adjusting part is configured to adjust the air passage by activity air passing area, the air adjusting part has the first shielding position of the air passage air passing area is adjusted to minimum;In the first shielding position, air passing gap is formed between the outer wall of the air adjusting part and the inner wall of the air passage.

Description

Technical Field

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

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

[0003] The premixer is a crucial component in fully premixed gas appliances. It mixes air and gas in a specific ratio to ensure optimal air-fuel ratio during combustion. However, existing premixers have complex and difficult-to-control adjustment methods at minimum load. Utility Model Content

[0004] The main purpose of this invention is to propose a premixer and gas equipment that simplifies the adjustment method when the premixer is under minimum load.

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

[0006] The premixer body has an air passage;

[0007] An air conditioning component is movably disposed in the air passage, the air conditioning component being configured to adjust the air passage area of ​​the air passage by means of movement, the air conditioning component having a first obstruction position that adjusts the air passage area of ​​the air passage to a minimum.

[0008] At the first shielding position, an air passage gap is formed between the outer wall of the air conditioning component and the inner wall of the air channel.

[0009] In one embodiment, at the first shielding position, an annular air passage gap is formed between the outer wall of the air conditioning component and the inner wall of the air channel.

[0010] And / or, the air conditioning component is rotatably disposed within the air passage, the air conditioning component is disc-shaped, and in the first blocking position, the air passage gap is annular;

[0011] And / or, the outer peripheral wall of the air conditioning component and / or the inner wall of the air passage are provided with grooves, the grooves being used to form at least a portion of the air passage gap;

[0012] And / or, the area of ​​the air passage gap is equal to the minimum air passage area required by the premixer under minimum load conditions.

[0013] In one embodiment, the air conditioning component includes an air flap rotatably disposed within the air channel to open or close the air channel; the rotation axis of the air flap is perpendicular to the centerline of the air channel; a virtual plane formed by the rotation axis of the air flap and the centerline of the air channel is defined as a first plane; the air flap has a first closed position that adjusts the air passage area of ​​the air channel to the minimum and a first open position that adjusts the air passage area of ​​the air channel to the maximum.

[0014] At the first obstruction position, the air flap is perpendicular to the first plane;

[0015] In the first open position, the air flap is parallel to the first plane.

[0016] In one embodiment, the premixer body further includes a gas passage and a mixing passage connecting the gas passage and the air passage. The premixer body also includes a gas regulator, which is rotatably disposed within the gas passage. The gas regulator is configured to adjust the gas passage area by rotation to regulate the amount of gas flowing into the mixing passage.

[0017] In one embodiment, the premixer further includes an adjustment shaft, which is rotatably disposed within the air passage and the gas passage. The air conditioning element and the gas conditioning element are both disposed on the adjustment shaft and can rotate synchronously with the adjustment shaft.

[0018] And / or, the premixer further includes a gas distributor, at least a portion of which is disposed within the gas passage. The gas distributor has a gas distribution hole communicating with the gas passage. The gas regulator is disposed on an adjusting shaft and can rotate synchronously with the adjusting shaft. Both the adjusting shaft and the gas regulator are disposed outside the gas distribution hole. The gas regulator is configured to adjust the gas passage area of ​​the gas distribution hole as the adjusting shaft rotates.

[0019] In one embodiment, the gas distribution component has a gas distribution cavity and a gas inlet and a gas distribution hole respectively communicating with the gas distribution cavity. The gas inlet is used to communicate with an external gas source. The gas regulating component is rotatably disposed in the gas distribution cavity to open or block the gas distribution hole.

[0020] In one embodiment, the gas regulator and the regulating shaft form a gas supply groove, or the gas regulator is provided with a gas supply groove;

[0021] When the gas regulator rotates within a first angle range, at least a portion of the opening of the gas supply groove is positioned toward the gas distribution hole to open the gas distribution hole;

[0022] When the gas regulator rotates within the second angle range, the opening of the gas supply groove is oriented towards the direction outside the gas distribution hole, and the outer peripheral wall of the gas regulator blocks the gas distribution hole.

[0023] In one embodiment, the gas regulator is circumferentially disposed on 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 gas supply groove. The gas supply groove has a first groove and a second groove. The first groove is opened outward along the axial direction of the regulating shaft and communicates with the gas inlet hole. The second groove is opened outward along the radial direction of the regulating shaft. The second groove is configured to selectively face the gas distribution hole as the gas regulator rotates.

[0024] In one embodiment, the gas passage includes a gas equalization chamber, which connects the outlet end of the gas distribution hole and the gas mixing passage. The gas equalization chamber is provided with a corner to ensure that the gas flows into the gas mixing passage evenly.

[0025] And / or, the premixer further includes a Venturi tube having a Venturi channel and an air inlet, a gas injection inlet, and a mixed gas outlet communicating with the Venturi channel. The Venturi tube is disposed within the mixed gas channel. The air inlet is communicating with the air channel, and the gas injection inlet is communicating with the gas channel. The Venturi channel is used to allow air from the air channel to flow in and to inject gas from the gas channel for mixing air and gas.

[0026] This utility model also proposes a gas equipment, which includes the premixer described above.

[0027] The premixer of this utility model includes a premixer body and an air conditioning component. The air conditioning component is movably disposed in the air channel. The air conditioning component has a first blocking position that adjusts the air passage area of ​​the air channel to the minimum. In the first blocking position, an air passage gap is formed between the outer wall of the air conditioning component and the inner wall of the air channel. With this configuration, when the premixer is in the minimum load state, even without adjusting the air conditioning component, air can flow through the air passage gap and mix with the fuel flowing into the premixer. This helps to simplify the adjustment method of the premixer and ensures that the premixer can have an air supply even in the minimum load state. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the structure of an embodiment of the premixer provided by this utility model;

[0030] Figure 2 for Figure 1 A schematic diagram of the decomposed structure in the diagram;

[0031] Figure 3 for Figure 1 A cross-sectional view of the air conditioning and gas conditioning components in the first angular range at 0 degrees.

[0032] Figure 4 for Figure 1 A structural cross-sectional view of the air conditioning and gas conditioning components in the first angular range at 0 degrees, taken from another perspective.

[0033] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0034] Figure 6 for Figure 5 A structural diagram from another perspective of the structure;

[0035] Figure 7 for Figure 1 A cross-sectional view of the air conditioning and gas conditioning components at 90 degrees within the first angular range;

[0036] Figure 8 for Figure 1 A structural cross-sectional view of the air conditioning and gas conditioning components at 90 degrees within the first angular range from another perspective.

[0037] Figure 9 for Figure 8 A structural diagram from another perspective of the structure;

[0038] Figure 10 This is a partial structural schematic diagram of an embodiment of the premixer of this utility model;

[0039] Figure 11 for Figure 10 A schematic diagram of the decomposed structure in the diagram;

[0040] Figure 12This is a partial structural schematic diagram of another embodiment of the premixer of this utility model;

[0041] Figure 13 for Figure 12 A schematic diagram of the decomposed structure in the diagram;

[0042] Figure 14 This is a partial structural schematic diagram of one embodiment of the premixer of this utility model;

[0043] Figure 15 for Figure 14 A structural diagram from another perspective;

[0044] Figure 16 for Figure 15 A schematic diagram of the second slot in the middle;

[0045] Figure 17 This is a partial structural schematic diagram of another embodiment of the premixer of this utility model;

[0046] Figure 18 for Figure 17 A schematic diagram of the first and second slots in the middle;

[0047] Figure 19 for Figure 2 A schematic diagram of the structure of a Venturi tube;

[0048] Figure 20 for Figure 19 A sectional view of the structure.

[0049] Explanation of icon numbers:

[0050] 10. Premixer;

[0051] 100. Premixer body; 110. Gas passage; 111. Gas flow equalization chamber; 112. Corner; 120. Air passage; 121. Air passage gap; 130. Mixing passage; 140. Base; 141. Mounting port; 142. Mounting through hole; 150. Cover plate; 160. Regulator; 170. Air conditioning component;

[0052] 200. Gas regulating component; 210. Gas supply slot; 220. First slot opening; 230. Second slot opening; 240. Gas blocking part; 250. Gas passage hole;

[0053] 300. Adjusting shaft;

[0054] 400 Gas distribution component; 410 Gas distribution hole; 420 Gas distribution chamber; 430 Gas inlet hole; 440 First mounting hole; 450 Second mounting hole; 460 First side wall; 470 Second side wall; 480 Third side wall; 490 Fourth side wall;

[0055] 500, Venturi tube; 510, Venturi passage; 520, air inlet; 530, gas injection inlet; 540, mixed gas outlet; 550, first pipe section; 551, tapering section; 552, transition section; 560, second pipe section; 570, connection part;

[0056] 600. First sealing element;

[0057] 700. Second seal.

[0058] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0059] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0060] It should be noted that if the embodiments of this utility model 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.

[0061] Furthermore, if the embodiments of this utility model 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 where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0062] 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.

[0063] The premixer is a crucial component in fully premixed gas appliances. It mixes air and gas in a specific ratio to ensure optimal air-fuel ratio during combustion. However, existing premixers have complex and difficult-to-control adjustment methods at minimum load.

[0064] Based on this, this utility model proposes a premixer and a gas appliance including the premixer. Even when the premixer is under minimum load, it still provides air supply without adjustment, thus simplifying the adjustment method. 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.

[0065] 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 gas flow after the air and gas mixture is combined.

[0066] Please see Figures 1 to 6 In one embodiment of this utility model, the premixer 10 includes a premixer body 100 and an air conditioning component 170. The premixer body 100 has an air passage 120. The air conditioning component 170 is movably disposed in the air passage 120 and is configured to adjust the air passage area of ​​the air passage 120 by movement. The air conditioning component 170 has a first blocking position that adjusts the air passage area of ​​the air passage 120 to a minimum. In the first blocking position, an air passage gap 121 is formed between the outer wall of the air conditioning component 170 and the inner wall of the air passage 120 (e.g., ...). Figures 3 to 6 (As shown).

[0067] It is understood that the air channel 120 is used to allow air to flow in, and the size and location of the air channel 120 are not limited, but can be set according to specific needs. The shape of the air conditioning component 170 is not limited. The air conditioning component 170 is adapted to the air channel 120. The air conditioning component 170 can be plate-shaped, block-shaped, butterfly-shaped, disc-shaped, or other shapes, as long as the air conditioning component 170 can adjust the air passage area of ​​the air channel 120 by rotation.

[0068] Furthermore, the air conditioning component 170 can adjust the air passage area of ​​the air passage 120. In this solution, there is always an air passage gap 121 between the outer wall of the air conditioning component 170 and the inner wall of the air passage 120. This air passage gap 121 ensures that no matter how the air conditioning component 170 moves, air can always flow through the air passage 120 from the air passage gap 121 and mix with the fuel flowing into the premixer 10, so that the premixer 10 has air energy supply even under minimum load conditions. This simplifies the adjustment method of the premixer 10 under minimum load conditions, that is, the demand can be met without adjusting the air conditioning component 170 at this time.

[0069] The area of ​​the air passage gap 121 of the air conditioning component 170 in the first shielded position can be equal to the minimum air passage area required by the premixer 10 under minimum load conditions. This can meet the air volume requirements of the premixer 10 under minimum load conditions. At this time, the air conditioning component 170 does not need to be adjusted, thereby simplifying the adjustment method and ensuring that the air passage gap 121 can provide an accurate air volume, thereby improving the reliability of the premixer 10.

[0070] The premixer 10 of this utility model includes a premixer body 100 and an air conditioning component 170. The air conditioning component 170 is movably disposed in the air passage 120. The air conditioning component 170 has a first blocking position that adjusts the air passage area of ​​the air passage 120 to the minimum. In the first blocking position, an air passage gap 121 is formed between the outer wall of the air conditioning component 170 and the inner wall of the air passage 120. With this configuration, when the premixer 10 is in the minimum load state, even without adjusting the air conditioning component 170, air can flow through the air passage gap 121 and mix with the fuel gas flowing into the premixer 10. This simplifies the adjustment method of the premixer 10 and ensures that the premixer 10 can have an air supply even in the minimum load state.

[0071] In one embodiment, at the first shielding position, an annular air passage gap 121 is formed between the outer wall of the air conditioner 170 and the inner wall of the air channel 120. The annular air passage gap 121 allows air to flow from the circumference of the air conditioner 170 into the air channel 120, which helps to improve the uniformity of airflow velocity, that is, to improve the smoothness of airflow.

[0072] Please see Figures 2 to 12 In one embodiment, the air conditioning component 170 is rotatably disposed within the air passage 120. The air conditioning component 170 is disc-shaped, and in the first shielding position, the air passage gap 121 is annular.

[0073] It is understandable that the inner wall of the air passage 120 is circular along the cross-section perpendicular to the center line of the air passage 120, and the disc-shaped air conditioning component 170 is adapted to the inner wall with a circular cross-section. This facilitates accurate calculation and control of the air passage area of ​​the air passage 120, enabling the premixer 10 to provide an accurate amount of air and improving the reliability of the premixer 10.

[0074] Similarly, in the first shielding position, the annular air passage gap 121 is easy to calculate precisely during product design, ensuring that the area of ​​the annular air passage gap 121 can be adapted to the minimum load state of the premixer 10. Furthermore, by driving the air conditioning component 170 to rotate, the air passage area of ​​the air channel 120 can be adjusted, which helps to simplify the structure of the premixer 10.

[0075] In one embodiment, a groove is provided on the outer peripheral wall of the air conditioner 170 and / or the inner wall of the air passage 120, the groove forming at least a partial air passage gap 121. This arrangement means that the groove is provided on the outer peripheral wall of the air conditioner 170; or, the groove is provided on the inner wall of the air passage 120; or, the grooves are provided on both the outer peripheral wall of the air conditioner 170 and the inner wall of the air passage 120. The groove ensures that regardless of the movement of the air conditioner 170, there is always a gap between the outer wall of the air conditioner 170 and the inner wall of the air passage 120, forming at least a partial air passage gap 121. This ensures that the premixer 10 has an air supply even under minimum load conditions, thus simplifying the adjustment method of the premixer 10.

[0076] In one embodiment, the area of ​​the air passage gap 121 is equal to the minimum air passage area required by the premixer 10 under minimum load conditions. This satisfies the air volume requirement of the premixer 10 under minimum load conditions, eliminating the need to adjust the air conditioning element 170, thus simplifying the adjustment process and ensuring that the air passage gap 121 can provide an accurate air volume, thereby improving the reliability of the premixer 10.

[0077] Please see Figures 1 to 9 In one embodiment, the premixer body 100 further includes a gas passage 110 and a mixing passage 130 connecting the gas passage 110 and the air passage 120. The premixer body 100 also includes a gas regulator 200, which is rotatably disposed in the gas passage 110. The gas regulator 200 is configured to adjust the gas passage area of ​​the gas passage 110 by rotation, so as to adjust the amount of gas flowing into the mixing passage 130.

[0078] It is understood that the gas passage 110 is used to supply gas, and the type of gas is not limited, such as but not limited to: natural gas, liquefied petroleum gas, etc. The size and location of the gas passage 110 are not limited, and are set according to specific needs. The mixing passage 130 is used to premix the air and gas flowing into it. The size and location of the mixing passage 130 are not limited, and are set according to specific needs.

[0079] There are several ways in which the gas regulator 200 can be rotatably disposed within the gas passage 110, such as, but not limited to: directly driving the gas regulator 200 to rotate via the regulator 160; or, the gas regulator 200 can be disposed on the regulating shaft 300, with the regulator 160 driving the regulating shaft 300 to rotate, and the regulating shaft 300 driving the gas regulator 200 to rotate, wherein the regulator 160 can be a motor. Driving the gas regulator 200 to rotate is simple, easy to implement, and helps to simplify the structure of the premixer 10.

[0080] The shape of the gas regulator 200 is not limited. The gas regulator 200 is adapted to the gas passage 110. The gas regulator 200 can be plate-shaped, block-shaped, butterfly-shaped, or other shapes. It is only necessary that the gas regulator 200 can adjust the gas passage area of ​​the gas passage 110 by rotating.

[0081] In the technical solution of this utility model, the gas regulator 200 is rotatably disposed in the gas passage 110. The gas regulator 200 is configured to adjust the gas passage area of ​​the gas passage 110 by rotating. This arrangement allows the gas regulator 200 to adjust the gas passage area of ​​the gas passage 110 by rotating within the gas passage 110, which in turn adjusts the gas intake volume. The method of controlling the rotation of the gas regulator 200 within the gas passage 110 is simple and easy to implement, thereby simplifying the structure of the premixer 10 and facilitating the premixer 10 to adjust the gas intake volume.

[0082] Please see Figures 2 to 12 In one embodiment, the premixer 10 further includes an adjustment shaft 300, which is rotatably disposed within the air passage 120 and the gas passage 110. The air conditioning component 170 and the gas conditioning component 200 are both disposed on the adjustment shaft 300 and can rotate synchronously with the adjustment shaft 300.

[0083] It is understandable that 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 scheme, the adjusting shaft 300 can drive the air regulating component 170 and the gas regulating component 200 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 scheme can always be kept within a preset range. This preset range of ratio is the air-gas ratio range with good combustion efficiency.

[0084] The technical solution of this application uses an adjusting shaft 300 to drive the air conditioning component 170 and the gas conditioning component 200 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, ensuring high combustion efficiency of the gas when applied to gas equipment. Furthermore, the adjusting shaft 300 can drive the air conditioning component 170 and the gas conditioning component 200 to rotate synchronously to adjust the air-fuel mixture ratio, simplifying the structure of the premixer 10. Therefore, the premixer 10 proposed in this application has a simple structure, and the premixer can ensure that the air-fuel ratio is always within an optimal range under different load conditions, thereby improving the combustion efficiency of gas equipment.

[0085] Please see Figures 2 to 13 In one embodiment, the premixer 10 further includes a gas distribution component 400, at least a portion of which is disposed within the gas passage 110. The gas distribution component 400 is provided with a gas distribution hole 410 communicating with the gas passage 110. A gas regulating component 200 is disposed on an adjusting shaft 300 and can rotate synchronously with the adjusting shaft 300. Both the adjusting shaft 300 and the gas regulating component 200 are disposed outside the gas distribution hole 410. The gas regulating component 200 is configured to adjust the gas passage area of ​​the gas distribution hole 410 as the adjusting shaft 300 rotates.

[0086] It is understood that the premixer body 100 includes a base 140. An adjustment shaft 300 passes through the base 140, and at least a portion of the adjustment shaft 300 is located within the gas passage 110 to drive the gas regulating component 200 within the gas passage 110 to rotate.

[0087] The shape of the gas distributor 400 is not limited; it can be plate-shaped, cylindrical, or other shapes. The gas distributor 400 can be separated from the base 140, or they can be an integral structure. The number of gas distribution holes 410 can be one or more. When there are multiple gas distribution holes 410, their area is not limited; for example, any two gas distribution holes 410 may have the same area, or at least two may have different areas, depending on the specific requirements. The gas distributor 400 is used to distribute the gas flowing into the gas passage 110, ensuring that the gas can only flow out of the gas distribution holes 410 and into the mixing passage 130 of the premixer body 100.

[0088] The adjusting shaft 300 is located outside the gas distribution hole 410, meaning that the adjusting shaft 300 will not obstruct the gas flowing through the gas distribution hole 410, allowing the gas to flow smoothly into the mixing channel 130 of the premixer body 100 through the gas distribution hole 410.

[0089] Along the gas outlet direction of the gas passage 110, the relative position of the gas distribution hole 410 and the gas regulator 200 is not limited. For example, the gas distribution hole 410 can be located downstream of the gas regulator 200, or the gas distribution hole 410 can be located upstream of the gas regulator 200, as long as the gas regulator 200 can adjust the gas passage area of ​​the gas distribution hole 410 by rotation. This solution, by providing the gas distribution hole 410 on the gas distributor 400, facilitates the gas regulator 200 to adjust the gas intake volume, that is, facilitates the adjustment of the gas volume flowing into the mixing passage 130 of the premixer body 100.

[0090] Please see Figures 3 to 9 In one embodiment, the gas distribution member 400 has a gas distribution cavity 420 and a gas inlet hole 430 and a gas distribution hole 410 respectively connected to the gas distribution cavity 420. The gas inlet hole 430 is used to communicate with an external gas source. The gas regulating member 200 is rotatably disposed in the gas distribution cavity 420 to open or block the gas distribution hole 410.

[0091] It is understood that the specific shape of the gas distribution chamber 420 is not limited here, as long as the gas regulator 200 can be adapted to the gas distribution chamber 420. External gas can flow into the gas distribution chamber 420 through the gas inlet 430, and the gas distribution port 410 can be opened or blocked by rotating the gas regulator 200.

[0092] When the gas regulator 200 opens the gas distribution hole 410, external gas can flow sequentially through the gas inlet hole 430, the gas distribution chamber 420, and the gas distribution hole 410 before flowing into the mixing channel 130. When the gas regulator 200 blocks the gas distribution hole 410, the gas regulator 200 is either in contact with or has a small gap with the inner wall of the gas distribution chamber 420 at the gas distribution hole 410, thus preventing the gas in the gas distribution chamber 420 from flowing out of the gas distribution hole 410. It should be noted that when there is a small gap between the gas regulator 200 and the inner wall of the gas distribution chamber 420 at the gas distribution hole 410, this small gap is to allow the gas regulator 200 to rotate within the gas distribution chamber 420, and the amount of gas flowing out through this small gap is minimal or negligible.

[0093] This solution involves configuring a gas distribution chamber 420, a gas inlet 430, and a gas distribution hole 410 on the gas distribution component 400. The gas regulating component 200 rotates within the gas distribution chamber 420, opening or blocking the gas distribution hole 410 to adjust the gas flow area and thus regulate the gas intake. This solution offers a simple and easy-to-implement adjustment method, simplifying the structure of the premixer 10.

[0094] Please see Figures 10 to 18 In one embodiment, the gas regulator 200 and the regulating shaft 300 form a gas supply groove 210, or the gas regulator 200 is provided with a gas supply groove 210; when the gas regulator 200 rotates within a first angle range, at least a portion of the groove opening of the gas supply groove 210 is positioned toward the gas distribution hole 410 to open the gas distribution hole 410; when the gas regulator 200 rotates within a second angle range, the groove opening of the gas supply groove 210 is positioned toward the direction outside the gas distribution hole 410, and the outer peripheral wall of the gas regulator 200 blocks the gas distribution hole 410.

[0095] It is understood that the specific numerical ranges of the first and second angle ranges are not limited. For example, the first angle range can 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 can be an angle range other than the first angle range, such as 150 to 360 degrees, or 180 to 360 degrees, or 270 to 360 degrees, etc. In one embodiment, the first and second angle ranges do not overlap.

[0096] The minimum gas passage area required when the gas is under minimum load is S1. For the gas regulator 200, 0 degrees can represent the gas regulator 200 in a preset initial position. This preset initial position can be the position where the gas regulator 200 adjusts the gas passage area of ​​the gas distribution hole 410 to S1.

[0097] The specific shape and position of the opening of the gas supply groove 210 are not limited. Specifically, in this embodiment, the first angle range is 0 degrees to 90 degrees; the second angle range is an angle range other than 0 degrees to 90 degrees. That is, when the gas regulator 200 rotates within the range of 0 degrees to 90 degrees, at least a portion of the opening of the gas supply groove 210 is positioned toward the gas distribution hole 410 to open the gas distribution hole 410.

[0098] like Figures 3 to 6 ,as well as Figure 13 and Figure 17 As shown, when the gas regulator 200 is at the 0-degree position, part of the slot of the gas supply slot 210 is set towards the gas distribution hole 410, so that the gas regulator 200 adjusts the gas passage area of ​​the gas distribution hole 410 to be equal to the minimum passage area required when the gas is in the minimum load state. At this time, it is the minimum amount of gas mixed by the premixer 10.

[0099] like Figures 7 to 9 ,as well as Figure 13 and Figure 17 As shown, when the gas regulator 200 is at a 90-degree position, at least a portion of the opening of the gas supply slot 210 faces the gas distribution hole 410, causing the gas regulator 200 to adjust the gas passage area of ​​the gas distribution hole 410 to its maximum, and the gas regulator 200 to fully open the gas distribution hole 410. This represents the maximum amount of gas mixed by the premixer 10. When the gas regulator 200 is at a position between 0 and 90 degrees, the amount of gas mixed by the premixer 10 is between its minimum and maximum. This configuration allows for adjustment of the gas passage area of ​​the gas distribution hole 410, which in turn allows for adjustment of the gas intake volume.

[0100] Please see Figures 14 to 18 In one embodiment, the gas regulator 200 is circumferentially disposed on a portion of the outer peripheral wall of the regulator 300 and surrounds the remaining outer peripheral wall of the regulator 300 to form a gas supply groove 210. The gas supply groove 210 has a first groove 220 and a second groove 230. The first groove 220 is opened outward along the axial direction of the regulator 300 and communicates with the gas inlet hole 430. The second groove 230 is opened outward along the radial direction of the regulator 300. The second groove 230 is configured to selectively face the gas distribution hole 410 as the gas regulator 200 rotates.

[0101] It is understood that the shape and size of the first slot 220 and the second slot 230 are not limited, and can be set according to the structure of the gas regulator 200 and the needs. The first slot 220 is connected to the gas inlet 430, so that the gas can flow smoothly into the gas supply slot 210. The second slot 230 is located on the outer peripheral wall of the gas regulator 200. When the gas regulator 200 needs to open the gas distribution hole 410, the second slot 230 is rotated to face the gas distribution hole 410; when the gas regulator 200 needs to block the gas distribution hole 410, the second slot 230 is rotated to face outward from the gas distribution hole 410, so that the outer peripheral wall of the gas regulator 200 blocks the gas distribution hole 410. This simplifies the way of adjusting the gas passage area of ​​the gas distribution hole 410 and helps to simplify the structure of the premixer 10.

[0102] like Figures 14 to 16 As shown, in one embodiment, the gas regulator 200 includes a plurality of regulating plates connected in sequence, and the gas regulator 200 and the regulating shaft 300 form a gas supply groove 210, as shown. Figure 15 As shown, the air supply slot 210 has a first slot 220, which is opened outward along the axial direction of the adjusting shaft 300. For example... Figure 16 As shown, the air supply slot 210 has a second slot 230, which is opened radially outward along the adjustment shaft 300.

[0103] like Figure 17 and Figure 18 As shown, in another embodiment, the gas regulator 200 is block-shaped and has a gas supply groove 210. The gas supply groove 210 has a first opening 220 that opens outward along the axial direction of the regulating shaft 300. The gas supply groove 210 also has a second opening 230 that opens outward along the radial direction of the regulating shaft 300.

[0104] like Figure 17 and Figure 18 As shown, in one embodiment, the gas regulator 200 further includes a gas blocking part 240, which is disposed at one end of the gas supply groove 210 away from the first groove opening 220 along the axial direction of the regulating shaft 300, so as to block the end of the gas supply groove 210 away from the gas inlet hole 430.

[0105] Understandably, by setting the gas blocking part 240, not only can the gas flow away from the first slot 220 along the axial direction of the adjusting shaft 300, so that when gas mixing is required, the gas flowing into the gas supply slot 210 can flow smoothly from the second slot 230 toward the gas distribution hole 410; the gas blocking part 240 also enhances the integrity of the gas regulating component 200, making the gas regulating component 200 more complete in the rotational circumferential direction, which helps to reduce shaking and increase the rotational stability of the gas regulating component 200.

[0106] Please see Figures 10 to 18 In one embodiment, the inner wall of the gas distribution cavity 420 at the gas distribution hole 410 is circular in cross section along the radial direction of the adjustment shaft 300, and the gas adjustment member 200 has an arc-shaped outer wall surface that is adapted to the cavity wall of the gas distribution cavity 420.

[0107] It is understandable that the arc-shaped outer wall of the gas regulator 200 forms a circular outline when rotated. This circular outline can be adapted to the inner cavity wall with a circular cross-section, so that the gas regulator 200 can rotate stably in the gas distribution cavity 420, thereby improving the compatibility between the gas regulator 200 and the gas distribution component 400.

[0108] In one embodiment, the gas regulator 200 is arranged in a fan shape in the radial section along the regulating shaft 300. This arrangement makes it easy for the gas regulator 200 to form a gas supply groove 210 with the regulating shaft 300. The outer peripheral wall of the gas regulator 200 can selectively open or block the gas distribution hole 410 as the regulating shaft 300 rotates, and the size of the outer peripheral wall of the gas regulator 200 is adapted to the size of the gas distribution hole 410.

[0109] Please see Figure 14 and Figure 15 In one embodiment, the gas regulator 200 is provided with a gas passage hole 250 located between the regulating shaft 300 and the outer peripheral wall of the gas regulator 200, and the gas passage hole 250 passes through the opposite sides of the gas regulator 200 along the circumferential direction of the regulating shaft 300.

[0110] It is understandable that the shape, size, and number of the vent holes 250 are not limited, as long as the gas can pass through the gas regulator 200 along the vent holes 250. By setting the vent holes 250, it is beneficial to improve the smoothness of the gas flow in the gas distribution chamber 420, that is, to improve the smoothness of the gas flow from the gas distribution chamber 420 through the gas distribution holes 410.

[0111] In one embodiment, the number of gas inlet holes 430 is one or more, that is, the number of gas inlet holes 430 is not limited and can be set as needed.

[0112] In one embodiment, there are multiple gas inlet holes 430, and any two gas inlet holes 430 have the same area, or at least two gas inlet holes 430 have different areas. This arrangement means that the multiple gas inlet holes 430 are spaced apart, and the areas of the multiple gas inlet holes 430 can be at least partially the same or at least partially different; the specific arrangement is not limited here.

[0113] In one embodiment, the gas inlet 430 and the gas regulator 200 are staggered along the axial direction of the regulating shaft 300. This arrangement ensures that the gas regulator 200 does not obstruct the gas inlet 430, allowing gas to flow from the gas inlet 430 into the gas distribution chamber 420 regardless of whether the gas regulator 200 rotates. This facilitates the smooth flow of gas through the gas inlet 430, the gas distribution chamber 420, and the gas distribution hole 410 before flowing into the mixing channel 130 when the gas regulator 200 opens the gas distribution hole 410.

[0114] In one embodiment, along the axial direction of the adjusting shaft 300, the gas inlet 430 and the gas distribution hole 410 are staggered on the gas distribution member 400. This arrangement ensures that when the gas regulating member 200 rotates within the gas distribution chamber 420, it can only open or block the gas distribution hole 410, without blocking the gas inlet 430. The gas inlet 430 remains open, facilitating the smooth flow of gas into the gas distribution chamber 420.

[0115] Please see Figures 10 to 13 In one embodiment, the gas distribution component 400 is provided with a first mounting hole 440 communicating with the gas distribution cavity 420, and the gas regulating component 200 is installed in the gas distribution cavity 420 through the first mounting hole 440; the opening direction of the first mounting hole 440 is towards the axial direction of the regulating shaft 300.

[0116] Understandably, by providing a first mounting hole 440 on the gas distribution component 400, with the opening of the first mounting hole 440 facing the axis of the adjusting shaft 300, the gas regulating component 200 can be smoothly installed into the gas distribution cavity 420 without needing to be adjusted after being installed into the gas distribution cavity 420, thus improving the structural compactness. The shape and position of the first mounting hole 440 are not limited, as long as the gas regulating component 200 can be smoothly installed into the gas distribution cavity 420.

[0117] In one embodiment, the centerline of the first mounting hole 440 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 420 along the centerline of the first mounting hole 440, the position of the axis of the adjusting shaft 300 remains unchanged. The gas regulating component 200 is mounted on the adjusting shaft 300, meaning the size of the gas regulating component 200 is adapted to the size of the gas distribution chamber 420, thus ensuring that the position of the axis of the adjusting shaft 300 remains unchanged. This improves the adaptability of the assembled parts.

[0118] Please see Figures 10 to 13 In one embodiment, the gas distribution member 400 has a first sidewall 460 and a second sidewall 470 opposite to each other, and a third sidewall 480 and a fourth sidewall 490 located between the first sidewall 460 and the second sidewall 470 and arranged around the rotational circumference of the gas regulating member 200. The third sidewall 480 and the fourth sidewall 490 are arranged adjacent to or opposite to each other. A first mounting hole 440 is provided on the first sidewall 460. A second mounting hole 450 for the regulating shaft 300 to pass through is provided on the second sidewall 470. A gas inlet hole 430 is provided on the third sidewall 480 and a gas distribution hole 410 is provided on the fourth sidewall 490.

[0119] It is understood that the outer surface of the gas distributor 400 can be square, or other shapes, which are not limited here. The first mounting hole 440 and the second mounting hole 450 are located on opposite side walls of the gas distributor 400, facilitating the insertion of the adjusting shaft 300 through the first mounting hole 440 and its exit through the second mounting hole 450, thereby improving installation stability and convenience. The gas inlet hole 430 and the gas distribution hole 410 are located on different side walls of the gas distributor 400, allowing gas to flow in from one side of the gas distributor 400 and exit from the other side, thus improving the smoothness of gas flow.

[0120] In one embodiment, the gas distributor 400 has a first sidewall 460 and a second sidewall 470 opposite to each other, and an outer peripheral wall located between the first sidewall 460 and the second sidewall 470. A first mounting hole 440 is provided on the first sidewall 460, and a second mounting hole 450 for the adjustment shaft 300 to pass through is provided on the second sidewall 470. A gas inlet hole 430 and a gas distribution hole 410 are provided on the outer peripheral wall of the gas distributor 400 and are spaced apart around the rotational circumference of the gas regulator 200.

[0121] Understandably, the first mounting hole 440 and the second mounting hole 450 are on opposite side walls of the gas distribution component 400, which facilitates the insertion of the adjustment shaft 300 through the first mounting hole 440 and its exit through the second mounting hole 450, thereby improving installation stability and convenience.

[0122] To improve the smoothness of gas flow and prevent the gas regulator 200 from blocking the gas inlet 430, optionally, the gas inlet 430 and the gas distribution hole 410 are staggered and spaced on the outer peripheral wall of the gas distributor 400 along the axial direction of the regulator shaft 300. This makes the gas inlet 430 normally open, which is conducive to the smooth flow of gas into the gas distribution chamber 420.

[0123] In one embodiment, the gas distributor 400 is cylindrical. This design simplifies the structure of the gas distributor 400 and makes it easy to manufacture.

[0124] Please see Figures 2 to 6 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 141 communicating with the gas passage 110. The gas distributor 400 is installed in the gas passage 110 through the installation port 141. The cover plate 150 is detachably covered by the installation port 141. 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.

[0125] It is understood that the regulator 160 is a motor, which drives the regulating shaft 300 to rotate, thereby causing the air conditioning component 170 and the gas conditioning component 200 to rotate synchronously. The installation port 141 facilitates the installation of the gas distributor 400 within the gas passage 110, and the cover plate 150 can limit the gas distributor 400 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.

[0126] 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.

[0127] In one embodiment, the adjusting shaft 300 and the gas regulating component 200 are an integral structure. This configuration, where the adjusting shaft 300 and the gas regulating component 200 are integrated into a single unit, reduces assembly and manufacturing costs and improves the rotational stability of the gas regulating component 200.

[0128] In one embodiment, the number of gas distribution holes 410 is one or more. That is, the number of gas distribution holes 410 is not limited and can be set as needed.

[0129] In one embodiment, the gas distribution hole 410 is located downstream of the gas regulator 200 along the gas outlet direction of the gas passage 110. This arrangement ensures that the gas regulator 200 does not affect the gas flowing out from the outlet end of the gas distribution hole 410, thereby improving the smoothness of the gas flow from the outlet end of the gas distribution hole 410.

[0130] In one embodiment, both the gas distributor 400 and the gas regulator 200 are plate-shaped, with the rotation axis of the gas regulator 200 perpendicular to the gas distributor 400. This configuration allows the gas passage area of ​​the gas distribution hole 410 on the gas distributor 400 to be adjusted by rotating the gas regulator 200.

[0131] In one embodiment, there are multiple gas distribution holes 410, and any two gas distribution holes 410 have the same area, or at least two gas distribution holes 410 have different areas. This arrangement means that the multiple gas distribution holes 410 are spaced apart, and the areas of the multiple gas distribution holes 410 can be at least partially the same or at least partially different; the specific details are not limited here.

[0132] 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.

[0133] 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.

[0134] In one embodiment, the rotation axes of the gas regulator 200 and the air regulator 170 coincide, making the rotation of the air regulator 170 and the gas regulator 200 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.

[0135] The adjusting shaft 300 drives the air conditioning component 170 and the gas conditioning component 200 to rotate synchronously. When the gas conditioning component 200 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.

[0136] In this embodiment, the first angle range is 0 degrees to 90 degrees; the second angle range is an angle range other than 0 degrees to 90 degrees, that is, the air conditioning component 170 can rotate within the range of 0 degrees to 90 degrees. For the air conditioning component 170, 0 degrees can represent the air conditioning component 170 at a preset initial position, which corresponds to the preset initial position of the gas regulating component 200. The preset initial position of the gas regulating component 200 is the position when the gas regulating component 200 adjusts the gas passing area of ​​the gas distribution hole 410 to S1, and the preset initial position of the air conditioning component 170 is the position when the air conditioning component 170 adjusts the air passing area of ​​the air passage 120 to S2. The ratio of the amount of air flowing through the air passage 120 at the air passing area of ​​S2 to the amount of gas flowing through the gas passage 110 at the gas passing area of ​​S1 is the preset air-fuel ratio of the premixer 10.

[0137] In other words, such as Figures 3 to 6 As shown, when the gas regulator 200 is at the 0-degree position, this is the minimum amount of 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 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 premixed gas, and the minimum amount of premixed gas corresponds to the minimum load of gas.

[0138] like Figures 7 to 9 As shown, when the air conditioning component 170 is at a 90-degree position, the gap between the air conditioning component 170 and the inner wall of the air passage 120 is at its maximum, which is the maximum amount of air mixed by the premixer 10. When the gas conditioning component 200 is at a 90-degree position, the premixer 10 mixes the maximum amount of gas. The maximum amount of gas mixed by the premixer 10, combined with the maximum amount of air mixed by the premixer 10, forms the maximum amount of premixed gas, which corresponds to the maximum gas load. When the air conditioning component 170 is between 0 and 90 degrees, the amount of air mixed by the premixer 10 is between its minimum and maximum, thus achieving adjustment of the air passage area of ​​the air passage 120.

[0139] Please see Figures 2 to 6 In one embodiment, the premixer body 100 includes a base 140, and the base 140 is provided with a mounting through hole 142 that connects the air passage 120 and the gas passage 110. The adjusting shaft 300 passes through the gas distribution chamber 420 and extends into the air passage 120 through the mounting through hole 142. The air conditioning component 170 and the gas conditioning component 200 are arranged on both sides of the mounting through hole 142 along the axial direction of the adjusting shaft 300.

[0140] It is understandable that by setting the mounting through hole 142, 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 142, and part of the adjusting shaft 300 is located in the gas distribution chamber 420. The air conditioning component 170 is located on the adjusting shaft 300 in the air passage 120, and the gas conditioning component 200 is located on the adjusting shaft 300 in the gas distribution chamber 420. That is, the air conditioning component 170 and the gas conditioning component 200 are located on both sides of the mounting through hole 142 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 200 to rotate synchronously.

[0141] The premixer 10 also includes a sealing ring, which is sleeved on the adjusting shaft 300 and located in the mounting through hole 142 to seal the gap between the adjusting shaft 300 and the mounting through hole 142.

[0142] 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.

[0143] In the first shielded position, the area of ​​the air passage gap between the outer wall of the air conditioner 170 and the inner wall of the air passage 120 is S2. 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 S2 to the amount of gas flowing through the gas passage 110 with the gas passage area S1 is the preset air-fuel ratio of the premixer 10. The preset air-fuel ratio of the premixer 10 is a design value, thus determining the size of the air passage gap area S2. The first shielded position of the air conditioner 170 is the preset initial position of the air conditioner 170 mentioned above, which is also the position of the air conditioner 170 at 0 degrees.

[0144] In one embodiment, the air conditioning component 170 includes an air flap rotatably disposed within an air passage 120 to open or close the air passage 120; the rotation axis of the air flap is perpendicular to the centerline of the air passage 120; a virtual plane formed by the rotation axis of the air flap and the centerline of the air passage 120 is defined as a first plane; the air flap has a first closed position that adjusts the air passage area of ​​the air passage to a minimum and a first open position that adjusts the air passage area of ​​the air passage to a maximum; in the first closed position, the air flap is perpendicular to the first plane (e.g., ...). Figures 3 to 6(as shown); in the first open position, the air flap is parallel to the first plane (as shown). Figures 7 to 9 (As shown).

[0145] It is understandable that the centerline of the air passage 120 refers to an imaginary straight line passing through the center of airflow within the air passage 120, that is, the geometric centerline traversing the air passage 120, and usually indicates the direction of airflow. The rotation axis of the air flap and the centerline of the air passage 120 form a first plane. In the first blocked position, the air flap is perpendicular to the first plane, and the air passage area of ​​the air passage 120 is at its minimum. In the first open position, the air flap is parallel to the first plane, and the air passage area of ​​the air passage 120 is at its maximum.

[0146] The air flap rotates within a first angle range. In this embodiment, the first angle range is 0 degrees to 90 degrees. The air flap is in the first blocking position, which is the position of the air flap at 0 degrees (e.g., Figures 3 to 6 (As shown). The air flap is in the first open position, which is the air flap at 90 degrees (e.g.). Figures 7 to 9 (As shown). The first angle range is from 0 degrees to 90 degrees, which can be referred to in the previous text and will not be repeated here.

[0147] Please see Figure 4 and Figure 6 In one embodiment, the gas passage 110 includes a gas equalization chamber 111, which connects the gas outlet of the gas distribution hole 410 and the gas mixing passage 130. The gas equalization chamber 111 is provided with a corner 112 so that the gas flows into the gas mixing passage 130 evenly.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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 the gas distribution hole 410. With this configuration, the gas flowing out from the outlet end of the gas distribution hole 410 changes its flow direction at the corner 112, improving the uniformity of gas distribution. The uniform gas then mixes with the air in the mixing channel 130, which helps to improve the uniformity of the mixed gas.

[0152] In one embodiment, a gas injection inlet 530 is formed at the intersection of the gas passage 110 and the mixing passage 130. Along the axial direction of the adjusting shaft 300, a corner 112 is located between the gas distribution hole 410 and the gas injection inlet 530. In the flow direction of the gas through the gas distribution hole 410, the corner 112 and the gas injection inlet 530 are offset. Projected along the axial direction of the adjusting shaft 300, the gas injection inlet 530 and the gas distribution hole 410 are located on the same side of the corner 112, so that the flow direction of the gas in a part of the gas passage 110 is opposite to the flow direction of the gas when it passes through the gas distribution hole 410. This configuration defines the relative positions of the gas distribution hole 410, the corner 112, and the gas injection inlet 530. Along the flow direction of the gas in the gas channel 110, the gas flows sequentially through the gas distribution hole 410, the corner 112, and the gas injection inlet 530 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 into the mixing channel 130.

[0153] Please see Figures 3 to 6 as well as Figure 19 and Figure 20 In one embodiment, the premixer 10 further 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 disposed 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.

[0154] The Venturi tube 500 is a pipe that uses the principle of fluid flow to regulate the flow rate. It controls the speed and pressure of the fluid by changing the cross-section of the pipe, thereby achieving flow rate or volume control.

[0155] 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.

[0156] In one embodiment, the gas injection inlet 530 is annularly arranged, and the venturi tube 500 further includes a connecting portion 570. At least a portion of the connecting portion 570 is disposed within 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. By connecting the first pipe section 550 and the second pipe section 560 through the connecting portion 570, it is ensured that the outer wall of the transition section 552 and the inner wall of the second pipe section 560 can form the gas injection inlet 530 at intervals, realizing the function of injecting gas; and the connecting portion 570 separates the gas injection inlet 530, allowing gas to flow into the second pipe section 560 from different directions, improving the uniformity of gas flow into the second pipe section 560.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] This utility model 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.

[0161] 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.

[0162] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A premixer, characterized in that, include: The premixer body has an air passage; An air conditioning component is movably disposed in the air passage, the air conditioning component being configured to adjust the air passage area of ​​the air passage by means of movement, the air conditioning component having a first obstruction position that adjusts the air passage area of ​​the air passage to a minimum. At the first shielding position, an air passage gap is formed between the outer wall of the air conditioning component and the inner wall of the air channel.

2. The premixer as described in claim 1, characterized in that, At the first shielding position, an annular air passage gap is formed between the outer wall of the air conditioning component and the inner wall of the air channel. And / or, the air conditioning component is rotatably disposed within the air passage, the air conditioning component is disc-shaped, and in the first blocking position, the air passage gap is annular; And / or, the outer peripheral wall of the air conditioning component and / or the inner wall of the air passage are provided with grooves, the grooves being used to form at least a portion of the air passage gap; And / or, the area of ​​the air passage gap is equal to the minimum air passage area required by the premixer under minimum load conditions.

3. The premixer as described in claim 1, characterized in that, The air conditioning component includes an air flap, which is rotatably disposed within the air channel to open or close the air channel; the rotation axis of the air flap is perpendicular to the centerline of the air channel; a virtual plane formed by the rotation axis of the air flap and the centerline of the air channel is defined as a first plane; the air flap has a first closed position that adjusts the air passage area of ​​the air channel to the minimum and a first open position that adjusts the air passage area of ​​the air channel to the maximum. At the first obstruction position, the air flap is perpendicular to the first plane; In the first open position, the air flap is parallel to the first plane.

4. The premixer as described in claim 1, characterized in that, The premixer body also has a gas passage and a mixing passage connecting the gas passage and the air passage. The premixer body also includes a gas regulator, which is rotatably disposed in the gas passage. The gas regulator is configured to adjust the gas passage area of ​​the gas passage by rotation to adjust the amount of gas flowing into the mixing passage.

5. The premixer as described in claim 4, characterized in that, The premixer also includes an adjustment shaft, which is rotatably disposed within the air passage and the gas passage. The air conditioning element and the gas conditioning element are both disposed on the adjustment shaft and can rotate synchronously with the adjustment shaft. And / or, the premixer further includes a gas distributor, at least a portion of which is disposed within the gas passage. The gas distributor has a gas distribution hole communicating with the gas passage. The gas regulator is disposed on an adjusting shaft and can rotate synchronously with the adjusting shaft. Both the adjusting shaft and the gas regulator are disposed outside the gas distribution hole. The gas regulator is configured to adjust the gas passage area of ​​the gas distribution hole as the adjusting shaft rotates.

6. The premixer as described in claim 5, characterized in that, The gas distribution component has a gas distribution cavity and a gas inlet and a gas distribution hole respectively connected to the gas distribution cavity. The gas inlet is used to communicate with an external gas source. The gas regulating component is rotatably disposed in the gas distribution cavity to open or block the gas distribution hole.

7. The premixer as claimed in claim 6, characterized in that, The gas regulator and the regulating shaft form a gas supply groove, or the gas regulator is provided with a gas supply groove. When the gas regulator rotates within a first angle range, at least a portion of the opening of the gas supply groove is oriented toward the gas distribution hole to open the gas distribution hole; When the gas regulator rotates within the second angle range, the opening of the gas supply groove is oriented towards the direction outside the gas distribution hole, and the outer peripheral wall of the gas regulator blocks the gas distribution hole.

8. The premixer as claimed in claim 7, characterized in that, The gas regulator is circumferentially disposed on 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 gas supply groove. The gas supply groove has a first groove and a second groove. The first groove is opened outward along the axial direction of the regulating shaft and communicates with the gas inlet hole. The second groove is opened outward along the radial direction of the regulating shaft. The second groove is configured to selectively face the gas distribution hole as the gas regulator rotates.

9. The premixer as described in claim 5, characterized in that, The gas passage includes a gas equalization chamber, which connects the outlet end of the gas distribution hole and the gas mixing passage. The gas equalization chamber has a corner to ensure that the gas flows into the gas mixing passage evenly. And / or, the premixer further includes a Venturi tube having a Venturi channel and an air inlet, a gas injection inlet, and a mixed gas outlet communicating with the Venturi channel. The Venturi tube is disposed within the mixed gas channel. The air inlet is communicating with the air channel, and the gas injection inlet is communicating with the gas channel. The Venturi channel is used to allow air from the air channel to flow in and to inject gas from the gas channel for mixing air and gas.

10. A gas-fired device, characterized in that, Includes the premixer as described in any one of claims 1 to 9.

Images