Premixing chamber, burner assembly and gas combustion plant for a gas combustion plant

Abstract

The application discloses a premixing cavity, a burner assembly and a gas combustion device for the gas combustion device. The premixing cavity comprises a cavity body having an air inlet side and an air outlet side; and a wind distribution plate arranged in the cavity body, the wind distribution plate separating the air inlet side and the air outlet side so that air and gas entering the cavity body from the air inlet side are discharged from the air outlet side after passing through the wind distribution plate, wherein the wind distribution plate is used for mixing the air and the gas. The premixing cavity for the gas combustion device according to the application can realize premixing of the air and the gas, and the wind distribution plate can re-mix the air and the gas, thereby improving the uniformity of the air and gas mixture, improving the combustibility of the air and gas mixture, and enabling the air and gas mixture to be fully combusted in the combustion stage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heaters, in particular to a premixing cavity for a gas combustion device, a burner assembly and a gas combustion device. BACKGROUND

[0002] The premixing cavity is an important part of a gas water heater, and is used for mixing air and gas. The uniformity of the mixing affects the combustion effect of the subsequent burner. For the existing premixing cavity, the air and gas are not mixed uniformly. SUMMARY

[0003] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides a premixing cavity for a gas combustion device, which mixes air and gas uniformly.

[0004] The present application also provides a burner assembly having the above premixing cavity for a gas combustion device.

[0005] The present application also provides a gas combustion device having the above burner assembly.

[0006] The premixing cavity for a gas combustion device according to the embodiments of the present application comprises: a cavity body having an air inlet side and an air outlet side; and an air distribution plate arranged in the cavity body, which separates the air inlet side and the air outlet side, so that the air and gas entering the cavity body from the air inlet side are discharged from the air outlet side after passing through the air distribution plate, wherein the air distribution plate is used for mixing the air and gas.

[0007] The premixing cavity for a gas combustion device according to the embodiments of the present application can realize the premixing of air and gas, and the air distribution plate can further mix the air and gas, thereby improving the uniformity of the air and gas mixture, and further improving the combustible performance of the air and gas mixture, so that the air and gas mixture can be fully combusted in the combustion stage.

[0008] According to some embodiments of the present application, the air distribution plate is a multi-stage air distribution plate, and the air distribution plate is arranged in the cavity body at intervals.

[0009] According to some embodiments of the present application, the air distribution plate is a multi-stage air distribution plate, and the air distribution plate is arranged in the cavity body at intervals. The multi-stage air distribution plate comprises: a first-stage air distribution plate close to the air inlet side, and a second-stage air distribution plate close to the air outlet side.

[0010] Specifically, the first-stage air distribution plate has a flow splitting and guiding structure for splitting and guiding the air and gas entering the cavity body from the air inlet side.

[0011] Further, the cavity comprises a cavity body and an inlet part, the inlet part is installed on the cavity body, the inlet part is configured as the air inlet side, and the inlet part is provided with an air inlet and a gas inlet.

[0012] Further, the air inlet is opposite to the flow guide structure.

[0013] Specifically, the inlet part is located at the bottom of the cavity body, the air inlet is located at the bottom surface of the inlet part, the gas inlet is located on the outer wall of the inlet part, and the air inlet and the gas inlet are perpendicular.

[0014] According to some embodiments of the present application, the primary air distribution plate comprises a first section and a second section located on both sides of the flow guide structure, and the flow guide structure protrudes towards the air inlet side relative to the first section and the second section.

[0015] Specifically, the flow guide structure comprises a first inclined section and a second inclined section, the first inclined section is connected with the first section, and the second inclined section is connected with the second section.

[0016] Further, a windward surface section is arranged between the first inclined section and the second inclined section, and the angle between the first inclined section and the first section is between 15°-75°, and the angle between the second inclined section and the second section is between 15°-75°.

[0017] Specifically, the cavity comprises a cavity body, a first inclined bottom wall corresponding to the first section is formed on the bottom wall of the cavity body, the first inclined bottom wall has the same inclination direction as the first inclined section, a second inclined bottom wall corresponding to the second section is formed on the bottom wall of the cavity body, and the second inclined bottom wall has the same inclination direction as the second inclined section.

[0018] According to some embodiments of the present application, a primary air distribution small hole is arranged on the flow guide structure, the first section and the second section, and a primary air distribution large hole is further arranged on the first section and the second section.

[0019] According to some embodiments of the present application, the first section and the second section are in the same plane and parallel to the secondary air distribution plate.

[0020] According to some embodiments of the present application, the secondary air distribution plate is uniformly provided with secondary air distribution holes.

[0021] According to some embodiments of the present application, the top of the cavity is further provided with an annular turned-up edge, and the turned-up edge is suitable for supporting and fixing a burner.

[0022] The burner assembly according to the second aspect of the present application comprises a burner and the premix chamber for a gas combustion device as described above, the burner is arranged at the air outlet side of the premix chamber, so that the air-gas mixture flowing out of the air outlet side is combusted at the burner.

[0023] The burner is a preheating burner or a flameless catalytic burner.

[0024] The gas combustion device according to the third aspect of the present application comprises the burner assembly as described above. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a front view of the premix chamber for a gas combustion device;

[0026] Figure 2 is a top view of the premix chamber for a gas combustion device;

[0027] Figure 3 is Figure 2 A-A sectional view in

[0028] Figure 4 is a bottom view of the premix chamber for a gas combustion device;

[0029] Figure 5 is a right view of the premix chamber for a gas combustion device.

[0030] REFERENCE NUMERALS:

[0031] Premix chamber 6, chamber body 61, air inlet side (inlet portion) 611, air inlet 6111, gas inlet 6112, air outlet side 612, chamber body 613, first inclined bottom wall 6131, second inclined bottom wall 6132, turned-up edge 614, air distribution plate 6230, primary air distribution plate 62, flow dividing and guiding structure 621, first inclined surface section 6211, second inclined surface section 6212, windward surface section 6213, first section 622, second section 623, primary air distribution hole 624, secondary air distribution plate 63, secondary air distribution hole 631. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein like or similar elements are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are exemplary, and are intended to explain the present application, and are not to be understood as limiting the present application.

[0033] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The following is combined with Figures 1-5 A detailed description is provided of the premixing chamber 6 for a gas combustion device according to an embodiment of the present invention.

[0036] Reference Figures 1-3 As shown, the premixing chamber 6 for a gas combustion device according to an embodiment of the present invention may include: a chamber 61 and an air distribution plate 6230. The chamber 61 has an air inlet side 611 and an air outlet side 612. The air distribution plate 6230 is disposed in the chamber 61 and separates the air inlet side 611 and the air outlet side 612, so that air and gas entering the chamber 61 from the air inlet side 611 pass through the air distribution plate 6230 and are discharged from the air outlet side 612. The air distribution plate 6230 is used to mix gas and air.

[0037] In some embodiments, the air distribution plate 6230 is a multi-stage air distribution plate 6230, and the multi-stage air distribution plates 6230 are arranged at intervals in the cavity 61. The air and gas entering the cavity 61 from the air inlet side 611 pass through the multi-stage air distribution plates 6230 in sequence and are discharged from the air outlet side 612. The air and gas are mixed in multiple stages, making the mixing more uniform.

[0038] In other words, after the air and gas enter the cavity 61 from the air inlet side 611, the air and gas are mixed for the first time at the air inlet side 611, and then pass through the multiple air distribution plates 6230 in sequence, and the air and gas are mixed once when passing through each air distribution plate 6230, and finally are discharged from the air outlet side 612. The air and gas mixed after passing through the multiple air distribution plates 6230 are relatively uniform and have good combustibility, thereby ensuring that the air and gas mixture discharged from the air outlet side 612 can be fully combusted after entering the combustor.

[0039] The air inlet side 611 can be centrally, left or right arranged to avoid other components of the gas combustion equipment according to actual needs.

[0040] The multiple air distribution plates 6230 can be one, two or more air distribution plates 6230. There are spacing spaces between the multiple air distribution plates 6230, which can provide buffer spaces for the air and gas mixture.

[0041] The premixing cavity 6 for the gas combustion equipment according to the embodiment of the present application can realize premixing of the air and gas, and the air and gas are mixed for the first time at the air inlet side 611, and then the air distribution plate 6230 can mix the air and gas again, thereby improving the uniformity of the air and gas mixture, and further improving the combustibility of the air and gas mixture, so that the air and gas mixture can be fully combusted in the combustion stage.

[0042] In Figures 2-4 In the embodiment shown, the multiple air distribution plates 6230 include a first air distribution plate 62 and a second air distribution plate 63. The first air distribution plate 62 is close to the air inlet side 611, and the second air distribution plate 63 is close to the air outlet side 612. From the gas flow direction, the second air distribution plate 63 is arranged at the downstream side of the first air distribution plate 62, as shown in Figure 3 The second air distribution plate 63 is arranged above the first air distribution plate 62. The air and gas entering the cavity 61 from the air inlet side 611 first pass through the first air distribution plate 62, and then pass through the second air distribution plate 63, and finally are discharged from the air outlet side 612.

[0043] Specifically, as shown in Figure 3 The first air distribution plate 62 has a flow splitting and guiding structure 621 for splitting and guiding the air and gas entering the cavity 61 from the air inlet side 611. The flow splitting and guiding structure 621 can disperse the air and gas mixture entering the cavity 61 from the air inlet side 611, so as to be split to the left and right sides, thereby further improving the mixing uniformity of the air and gas.

[0044] Further, the cavity 61 comprises a cavity body 613 and an inlet portion 611, the inlet portion 611 is installed on the cavity body 613, as shown in Figure 3 The inlet portion 611 is installed below the cavity body 613, and the inlet portion 611 is preferably integrally formed with the cavity body 613, and the internal cavities of the cavity body 613 and the inlet portion 611 are communicated. The inlet portion 611 is configured as the air inlet side 611 mentioned above, and the inlet portion 611 has an air inlet 6111 and a gas inlet 6112, air enters the cavity 61 through the air inlet 6111, and gas enters the cavity 61 through the gas inlet 6112, the air inlet 6111 and the gas inlet 6112 are separated, which can ensure that the air and gas inlet amounts can be adjusted separately, which is beneficial to adjusting the ratio of air and gas to meet the combustion demand.

[0045] Further, the air inlet 6111 is opposite to the split guiding structure 621. The air entering the cavity 61 from the air inlet 6111 and the gas entering the cavity 61 from the gas inlet 6112 will flow upward along the Figure 3 The air inlet 6111 is opposite to the split guiding structure 621, which can ensure that the air-gas mixture can directly impact the split guiding structure 621, and the split guiding structure 621 will divide the air-gas mixture into a part flowing to the left and a part flowing to the right, which can scatter the air and gas and increase the degree of mutual mixing of the air and gas.

[0046] Specifically, as shown in Figure 3 The inlet portion 611 is located at the bottom of the cavity body 613, the air inlet 6111 is located on the bottom surface of the inlet portion 611, the gas inlet 6112 is located on the outer wall of the side surface of the inlet portion 611, and the air inlet 6111 and the gas inlet 6112 are perpendicular. Therefore, the impact force of the air entering the cavity 61 from the air inlet 6111 and the gas entering the cavity 61 from the gas inlet 6112 at the inlet portion 611 is large, and the air and gas collide to accelerate the mixing of the air and gas.

[0047] Referring to Figure 3 The first section 622 is located on the left side of the split guiding structure 621, and the second section 623 is located on the right side of the split guiding structure 621. The split guiding structure 621 is configured as a conical structure protruding toward the air inlet side 611, so that when the air and gas from the air inlet side 611 reach the split guiding structure 621, the split guiding structure 621 has a more significant split guiding effect on the air-gas mixture.

[0048] Specifically, the flow splitting and guiding structure 621 comprises a first inclined section 6211 connected with the first section 622 and a second inclined section 6212 connected with the second section 623. The first inclined section 6211 and the second inclined section 6212 are arranged in a "V" shape, the first inclined section 6211 guides a portion of the air-gas mixture to the left side, and the second inclined section 6212 guides a portion of the air-gas mixture to the right side.

[0049] Further, a windward surface section 6213 is arranged between the first inclined section 6211 and the second inclined section 6212, and the angle between the first inclined section 6211 and the first section 622 is between 15° and 75°, and the angle between the second inclined section 6212 and the second section 623 is between 15° and 75°. For example, the angle between the first inclined section 6211 and the first section 622 is 45°, and the angle between the second inclined section 6212 and the second section 623 is 30°. It should be noted that the angle mentioned herein is defined in the form of an acute angle, which refers to the angle between the plane in which the first inclined section 6211 is located and the plane in which the first section 622 is located (or the angle between the plane in which the second inclined section 6212 is located and the plane in which the second section 623 is located), and in the actual structure, the angle can be in the form of an obtuse angle.

[0050] Specifically, the cavity 61 comprises a cavity body 613, a first inclined bottom wall 6131 corresponding to the first section 622 is formed on the bottom wall of the cavity body 613, the first inclined bottom wall 6131 has the same inclination direction as the first inclined section 6211, and a second inclined bottom wall 6132 corresponding to the second section 623 is formed on the bottom wall of the cavity body 613, the second inclined bottom wall 6132 has the same inclination direction as the second inclined section 6212. It should be noted that "the same inclination direction" is not limited to the same inclination angle, as long as the two have the same inclination trend. For example, the first inclined bottom wall 6131 and the first inclined section 6211 both incline to the upper left, and the second inclined bottom wall 6132 and the second inclined section 6212 both incline to the upper right.

[0051] The flow splitting and guiding structure 621, the first section 622, and the second section 623 are all provided with a first-level air distribution hole 624, which will be described below with reference to Figure 4As shown, the first section 622 and the second section 623 are in the same plane and are parallel to the second air distribution plate 63, so that the pressure of the air and the gas between the first air distribution plate 62 and the second air distribution plate 63 is relatively uniform.

[0052] Referring to Figure 3 As shown, the first section 622 and the second section 623 are in the same plane and are parallel to the second air distribution plate 63, so that the pressure of the air and the gas between the first air distribution plate 62 and the second air distribution plate 63 is relatively uniform.

[0053] The second air distribution plate 63 is provided with second air distribution holes 631. The gas between the first air distribution plate 62 and the second air distribution plate 63 passes through the second air distribution holes 631 to the gas outlet side 612, and the air and the gas are mixed again at the second air distribution holes 631, so as to further improve the uniformity of the mixture.

[0054] Referring to Figures 1-5 As shown, the top of the cavity 61 is further provided with an annular turned-up edge 614, which is adapted to support and fix the burner, so as to improve the mounting stability of the burner.

[0055] According to the second aspect of the present application, the burner assembly comprises a burner and the premixing cavity 6 for a gas combustion device according to the above-mentioned embodiments, and the burner is arranged at the gas outlet side 612 of the premixing cavity 6, so that the air-gas mixture discharged from the gas outlet side 612 is combusted at the burner.

[0056] The burner is a preheating burner or a flameless catalytic burner. The preheating burner can preheat the flameless catalytic burner to a suitable working temperature, so as to make the catalysis more sufficient, ensure the combustion of the gas in the burner to be sufficient, and prevent the generation of harmful gases such as CO and NOx due to insufficient combustion.

[0057] According to the third aspect of the present application, the gas combustion device comprises the burner assembly according to the above-mentioned embodiments.

[0058] In the description of the specification, the description using the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application. The illustrative appearance of the above-mentioned terms in the specification does not necessarily refer to the same embodiment or example. Moreover, the particular features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate different embodiments or examples described in the specification.

[0059] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be construed as limiting the present application, and those ordinarily skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A premixing chamber for a gas combustion device, characterized in that, include: A cavity having an air inlet side and an air outlet side; An air distribution plate is disposed in the cavity, the air distribution plate separating the air inlet side and the air outlet side, so that air and fuel gas entering the cavity from the air inlet side pass through the air distribution plate and are discharged from the air outlet side, wherein the air distribution plate is used to mix the fuel gas and the air; The air distribution plate includes a primary air distribution plate, which has a diversion and guiding structure. The diversion and guiding structure is used to divert and guide the air and fuel gas entering the cavity from the air intake side. The primary air distribution plate includes a first section and a second section located on both sides of the diversion and guiding structure. The diversion and guiding structure protrudes towards the air intake side relative to the first section and the second section. The diversion and guiding structure includes: a first inclined section and a second inclined section, the first inclined section being connected to the first section, the second inclined section being connected to the second section, a windward section being provided between the first inclined section and the second inclined section, and the angle between the first inclined section and the first section being between 15° and 75°, and the angle between the second inclined section and the second section being between 15° and 75°. The windward section, the first section, and the second section are all provided with primary air distribution small holes, and the first section and the second section are also provided with primary air distribution large holes. The first inclined section and the second inclined section are all provided with primary air distribution small holes. The cavity includes: a cavity body, the bottom wall of the cavity body having a first inclined bottom wall corresponding to the first segment, the first inclined bottom wall having the same inclination direction as the first inclined segment, and the bottom wall of the cavity body having a second inclined bottom wall corresponding to the second segment, the second inclined bottom wall having the same inclination direction as the second inclined segment.

2. The premixing chamber for a gas combustion device according to claim 1, characterized in that, The air distribution plate is a multi-stage air distribution plate, and the air distribution plates are arranged at intervals within the cavity.

3. The premixing chamber for a gas combustion device according to claim 1, characterized in that, The air distribution plate is a multi-stage air distribution plate, which is arranged at intervals in the cavity. The multi-stage air distribution plate includes: a secondary air distribution plate, wherein the primary air distribution plate is close to the air inlet side and the secondary air distribution plate is close to the air outlet side.

4. The premixing chamber for a gas combustion device according to claim 1, characterized in that, The cavity includes: The cavity body and the inlet are provided. The inlet is installed on the cavity body and is configured as the air intake side. The inlet has an air inlet and a gas inlet.

5. The premixing chamber for a gas combustion device according to claim 4, characterized in that, The air inlet is directly opposite the flow diversion guide structure.

6. The premixing chamber for a gas combustion device according to claim 5, characterized in that, The inlet is located at the bottom of the cavity body, the air inlet is located on the bottom surface of the inlet, the gas inlet is located on the outer wall of the inlet, and the air inlet and the gas inlet are perpendicular to each other.

7. The premixing chamber for a gas combustion device according to claim 1, characterized in that, The first segment and the second segment are in the same plane and parallel to the secondary air distribution plate.

8. The premixing chamber for a gas combustion device according to claim 3, characterized in that, The secondary air distribution plate is evenly distributed with secondary air distribution holes.

9. The premixing chamber for a gas combustion device according to claim 1, characterized in that, The top of the cavity is also provided with an annular outward flange, which is suitable for supporting and fixing the burner.

10. A burner assembly, characterized in that, include: The burner and the premixing chamber according to any one of claims 1-9, the burner being disposed on the outlet side of the premixing chamber such that the air-fuel mixture flowing out from the outlet side is burned at the burner.

11. The burner assembly according to claim 10, characterized in that, The burner is either a preheating burner or a flameless catalytic burner.

12. A gas combustion device, characterized in that, Includes the burner assembly as described in claim 10 or 11.

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