Gas distribution structure, burner and gas water heater

Abstract

The present invention relates to the field of burner technology, and in particular to a gas distribution structure, a burner and a gas water heater. A gas distribution structure comprises: an outer tube, which is provided with a plurality of first openings at intervals along the axial direction; an inner tube, which is sleeved inside the outer tube and connected to a rotating mechanism, the inner tube having a gas inlet and a gas outlet, the gas outlets being distributed along the circumference of the inner tube, and under the drive of the rotating mechanism, the coverage area of ​​the gas outlet corresponding to the first opening of the outer tube in the axial direction of the inner tube gradually changes to communicate with different numbers of first openings of the outer tube. The present invention provides a gas distribution structure, a burner and a gas water heater with stable gas distribution and regulation and good user experience.

Description

Technical Field

[0001] The invention relates to the technical field of burners, and in particular to a gas distribution structure, a burner and a gas water heater. Background Art

[0002] In order to obtain a larger adjustment range, traditional gas appliances usually use segmented burners. By using segmented burners, a part of the fire grates can be controlled to be extinguished or turned on during operation to meet different user needs. Traditional segmented burners often have multiple independent combustion fire grates. However, due to various reasons, common segmented burners usually have at least one gas branch, and a gas shut-off valve is installed on each gas branch that needs to be controlled to control the on and off of the branch, thereby controlling multiple independent combustion fire grates at the same time. In this way, since one gas branch controls multiple combustion fire grates at the same time, the combustion input of the branch will fluctuate greatly when it is segmented, affecting the stability of the burner flame, generating loud noise and other problems that lead to a decrease in user experience. In particular, the instant hot water function of the gas water heater will experience large fluctuations in the hot water temperature. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects of unstable gas distribution and regulation and poor user experience in the prior art, thereby providing a gas distribution structure, burner and gas water heater with stable gas distribution and regulation and good user experience.

[0004] In order to solve the above technical problems, the present invention provides a gas separation structure, comprising:

[0005] The outer tube is provided with a plurality of first openings spaced apart in the axial direction;

[0006] The inner tube is sleeved inside the outer tube and connected to the rotating mechanism. The inner tube has a gas inlet and a gas outlet. The gas outlets are distributed along the circumference of the inner tube. Under the drive of the rotating mechanism, the coverage area of ​​the gas outlet corresponding to the first opening of the outer tube in the axial direction of the inner tube gradually changes to communicate with different numbers of first openings of the outer tubes.

[0007] In the gas distribution structure, the gas outlet is a groove opened along the circumference of the inner tube, and the coverage area gradually increases or decreases as the rotating mechanism rotates.

[0008] In the gas distribution structure, the gas outlet is a groove opened along the circumference of the inner tube, and the coverage area increases first and then decreases, or decreases first and then increases, as the rotating mechanism rotates.

[0009] In the gas separation structure, the minimum area of ​​the groove along the axial direction of the inner tube is the area of ​​the first opening, and the maximum area of ​​the groove along the axial direction of the inner tube is the area covering all the first openings on the outer tube.

[0010] The gas separation structure further comprises a sealing tube between the inner tube and the outer tube, and the sealing tube is provided with a plurality of second openings corresponding to the first openings.

[0011] In the gas separation structure, the gas inlet and the rotating mechanism are respectively arranged at two ends of the axial direction of the inner tube.

[0012] The air separation structure, the rotating mechanism is a stepping motor.

[0013] A burner is also provided, comprising the gas distribution structure, wherein the inlet of the fire grate is connected to the first opening of the outer tube.

[0014] A gas water heater is also provided, comprising the burner.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. The gas distribution structure provided by the present invention only requires the driving mechanism to drive the inner tube to rotate and gradually change the coverage area of ​​the gas outlet of the inner tube connected to the first opening of the outer tube when the gas distribution amount needs to be adjusted. Since the gas outlet of the inner tube is distributed along the circumference of the inner tube and the coverage area gradually changes, when the inner tube rotates with the driving mechanism, the effective coverage area of ​​the gas outlet of the inner tube connected to the first opening of the outer tube gradually increases or decreases, that is, the number of first openings of the outer tube connected thereto gradually increases or decreases, thereby reducing the volatility in the gas distribution adjustment process, realizing stepless control, and improving the user experience. And the first opening is continuously distributed on the circumference of the inner tube. When the number of first openings on the outer tube increases or the distance between two adjacent first openings changes, it can still meet the needs and has high flexibility in use.

[0017] 2. In the gas distribution structure provided by the present invention, the coverage area of ​​the gas outlet of the inner tube connected to the first opening of the outer tube gradually increases or decreases with the rotation of the driving mechanism, or first increases and then decreases, or first decreases and then increases, so that the regulation of gas distribution is stable and the volatility is small.

[0018] 3. The gas separation structure provided by the present invention and the arrangement of a sealing tube between the inner tube and the outer tube prevent the occurrence of gas cross-talk.

[0019] 4. In the gas distribution structure provided by the present invention, the gas inlet and the rotating mechanism are respectively arranged at the two ends of the inner tube in the axial direction, thereby preventing the gas from entering from the side wall of the inner tube, causing the gas volume at the gas outlet opposite to the gas inlet to suddenly increase, and the corresponding first opening of the outer tube outputs more gas, affecting the uniformity of the gas output, and further ensuring the stability of the gas regulation.

[0020] 5. The burner provided by the present invention realizes stepless regulation of gas output, thereby ensuring combustion stability and improving user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of a gas separation structure provided by the present invention;

[0023] Figure 2 for Figure 1 Exploded diagram of

[0024] Figure 3 It is the first unfolded plan view of the inner tube;

[0025] Figure 4 It is the second unfolded plan view of the inner tube;

[0026] Figure 5 This is the third unfolded plan view of the inner tube;

[0027] Figure 6 A schematic diagram of a burner provided by the present invention.

[0028] Description of reference numerals:

[0029] 1. Inner tube; 2. Outer tube; 3. First opening; 4. Rotating mechanism; 5. Gas inlet; 6. Gas outlet; 7. Sealing tube; 8. Fire grate. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figure 1 -3 shows a specific embodiment of the gas distribution structure, comprising an inner tube 1 and an outer tube 2 which are nested with each other. A plurality of first openings 3 for allowing the gas to be discharged are arranged at intervals along the axial direction on the tube wall of the outer tube 2, and the plurality of first openings 3 are arranged in a row parallel to the axis of the outer tube 2. The inner tube 1 is sleeved inside the outer tube 2 and connected to a stepper motor as a rotating mechanism 4. Under the action of the rotating mechanism 4, it can rotate 360° along the inner wall of the outer tube 2. The inner tube 1 has a gas inlet 5 and a gas outlet 6, and the gas inlet 5 and the rotating mechanism 4 are arranged at both ends of the axial direction of the inner tube 1. In this embodiment, the gas inlet 5 is arranged at the bottom and the rotating mechanism 4 is arranged at the top, and the external gas directly enters the cavity of the inner tube 1 through the gas inlet 5. The gas outlet 6 is distributed along the circumference of the inner tube 1, and is used to output the gas in the inner tube 1 to the outside through the first opening 3 of the outer tube 2. Driven by the rotating mechanism 4, the coverage area of ​​the gas outlet 6 corresponding to the first opening 3 of the outer tube 2 in the axial direction of the inner tube 1 gradually changes to be connected with different numbers of the first openings 3 of the outer tube 2, thereby outputting different amounts of gas step by step according to different needs.

[0033] like Figure 3 As shown, the gas outlet 6 is a groove opened along the circumference of the inner tube 1, and the coverage area gradually increases as the rotating mechanism 4 rotates. The groove is an isosceles trapezoid, so that when the inner tube 1 rotates, the number of the first openings 3 of the outer tube 2 connected to the gas outlet 6 of the inner tube 1 gradually increases from the center to the two ends. When it is necessary to reduce the number of the first openings 3 of the outer tube 2 connected to the gas outlet 6 of the inner tube 1 to reduce the gas supply, it is only necessary to rotate the rotating mechanism 4 in the opposite direction. The groove is a continuous through groove opened along the circumference of the inner tube 1, so that when the number of the first openings 3 of the outer tube 2 or the spacing between two adjacent first openings 3 changes, it can also meet the needs, and can be applicable to outer tubes 2 of different specifications, which is more practical.

[0034] In order to accurately control the number of first openings 3 of the outer tube 2 connected to the gas outlet 6 of the inner tube 1 and realize accurate regulation of the gas output, the minimum area of ​​the groove along the axial direction of the inner tube 1 is the area of ​​the first opening 3, such as Figure 3 The leftmost area of ​​the trapezoidal groove, the maximum area of ​​the groove along the axial direction of the inner tube 1 is the area covering all the first openings 3 on the outer tube 2, such as Figure 3 The rightmost area of ​​the trapezoidal groove.

[0035] In order to ensure that the gas in the inner tube 1 is output along a predetermined path and reduce gas leakage, a sealing tube 7 is further arranged between the inner tube 1 and the outer tube 2. The sealing tube 7 is provided with a plurality of second openings corresponding to the first openings 3. The gas in the inner tube 1 is output to the outside through the gas outlet 6, the second openings and the first opening 3 in sequence.

[0036] A burner is also provided, such as Figure 6 As shown, the gas distribution structure includes a plurality of fire bars 8 distributed vertically, and the inlet of the fire bar 8 is connected to the first opening 3 of the outer tube 2. The gas in the inner tube 1 enters the fire bar 8 through the first opening 3 of the outer tube 2 and burns.

[0037] When the number of fire bars 8 connected to the gas distribution structure needs to be adjusted, the stepper motor only needs to drive the inner tube 1 to rotate until the effective coverage area of ​​the groove matches the number of fire bars 8 to be connected. During the rotation process, since the effective coverage area gradually changes, the number of fire bars 8 connected thereto also gradually increases or decreases, thereby ensuring the stability of combustion in the fire bars 8.

[0038] A gas water heater is also provided, comprising the burner, which achieves a smooth change in the output water temperature and improves the user experience.

[0039] As an alternative implementation, Figure 4 As shown, the gas outlet 6 is a groove opened along the circumference of the inner tube 1, and the coverage area gradually decreases as the rotating mechanism 4 rotates. The groove is a right triangle, and the minimum area of ​​the groove along the axial direction of the inner tube 1 is located at Figure 4 When the position corresponds to the first opening 3 of the outer tube 2, only one first opening 3 is connected, and the output gas volume is the smallest at this time; the maximum area of ​​the groove along the axial direction of the inner tube 1 is located at Figure 4 When the position is at the far left side and corresponds to the first opening 3 of the outer tube 2, all the first openings 3 are connected, and the output gas volume is the largest at this time.

[0040] As an alternative implementation, Figure 5 As shown, the gas outlet 6 is a groove opened along the circumference of the inner tube 1, and the coverage area first decreases and then increases as the rotating mechanism 4 rotates. The groove includes two connected trapezoids, and the minimum coverage area of ​​the gas outlet 6 is located at the connection of the shorter bottom sides of the two trapezoids, and the maximum coverage area is located at the longer bottom side of the larger trapezoid. Of course, the gas outlet 6 can also be a groove opened along the circumference of the inner tube 1, and the coverage area first increases and then decreases as the rotating mechanism 4 rotates. As long as the groove is continuous in the circumference, the connection area with the first opening 3 of the outer tube 2 is gradually changed.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A gas separation structure, characterized in that: include: The outer tube (2) is provided with a plurality of first openings (3) at intervals along the axial direction; An inner tube (1) is sleeved inside the outer tube (2) and connected to a rotating mechanism (4); the inner tube (1) has a gas inlet (5) and a gas outlet (6); the gas outlets (6) are distributed along the circumference of the inner tube (1); and under the drive of the rotating mechanism (4), the coverage area of ​​the gas outlets (6) corresponding to the first openings (3) of the outer tube (2) in the axial direction of the inner tube (1) gradually changes, so as to communicate with different numbers of first openings (3) of the outer tubes (2); The gas outlet (6) is a groove opened along the circumference of the inner tube (1), and the coverage area gradually increases or decreases, or first increases and then decreases, or first decreases and then increases, as the rotating mechanism (4) rotates. The groove is a continuous through groove opened along the circumference of the inner tube (1). A sealing tube (7) is also provided between the inner tube (1) and the outer tube (2). The sealing tube (7) is provided with a plurality of second openings corresponding to the first openings (3). The gas in the inner tube (1) is output to the outside through the gas outlet (6), the second openings and the first opening (3) in sequence.

2. The gas separation structure according to claim 1, characterized in that: The minimum area of ​​the groove along the axial direction of the inner tube (1) is an area that can only connect to one of the first openings (3), and the maximum area of ​​the groove along the axial direction of the inner tube (1) is an area that can connect to all of the first openings (3) on the outer tube (2).

3. The gas separation structure according to any one of claims 1 to 2, characterized in that: The gas inlet (5) and the rotating mechanism (4) are respectively arranged at two axial ends of the inner tube (1).

4. The gas separation structure according to any one of claims 1 to 2, characterized in that: The rotating mechanism (4) is a stepping motor.

5. A burner, characterized in that: It comprises the gas distribution structure according to any one of claims 1 to 4, wherein the inlet of the fire grate (8) is connected to the first opening (3) of the outer tube (2).

6. A gas water heater, characterized in that: Comprising the burner as claimed in claim 5.

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