Sectional combustion device and gas water heater

Abstract

The present invention relates to a segmented combustion device and a gas water heater. When the mixed gas is introduced into the first air intake channel, the mixed gas flows into the third mixing chamber under the action of the diverter chamber, and finally flows out from the second fire hole of the second main body. When the mixed gas is introduced into the second air intake channel, the mixed gas flows into the second mixing chamber; then flows into the first mixing chamber from the first air outlet on the gas diverter; and finally flows out from the first fire hole on the first main body. In this way, the mixed gas flows out from different height positions, effectively meeting the user's needs for different load combustion and realizing segmented combustion of the combustion device. During the air intake process, the segmented combustion device uses the first diverter to form a second mixing chamber in the gas diverter, effectively extending the flow path of the mixed gas, allowing the gas and air to be fully mixed, improving the mixing uniformity of the gas, and helping to improve the segmented combustion characteristics.

Description

Technical Field

[0001] The invention relates to the technical field of gas combustion, in particular to a segmented combustion device and a gas water heater. Background Art

[0002] A burner is a device that burns a mixture of gas and air. According to the different combustion forms, it can be divided into full premixed combustion devices and atmospheric combustion devices.

[0003] In order to increase the heat load adjustment ratio, the existing atmospheric burner is designed as a two-layer burner body structure connected up and down. During the intake process, the intake structure is used to split the gas into two streams, which flow independently into the upper and lower layers of the burner body to achieve different load combustion. However, due to the limitations of the intake structure design, there is still room for improvement in the combustion characteristics and overall volume design of the burner. Summary of the invention

[0004] The first technical problem solved by the present invention is to provide a segmented combustion device, which can effectively improve the mixing uniformity of gas and air and improve the segmented combustion characteristics; at the same time, it is also convenient for miniaturization of the whole machine.

[0005] The second technical problem solved by the present invention is to provide a gas water heater which can effectively improve the mixing uniformity of gas and air and improve the staged combustion characteristics; at the same time, it is also convenient for miniaturization of the whole machine.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] A segmented combustion device, the segmented combustion device comprising: a first main body, the first main body is provided with a first fire hole; a gas separator, the gas separator is embedded in the first main body and a first mixing chamber is formed between the gas separator and the first main body, the gas separator is provided with a first air inlet channel and a second air inlet channel; a first diverter, the first diverter is embedded in the gas separator and a second mixing chamber connected to the second air inlet channel is formed between the gas separator and the gas separator, the gas separator is provided with a first air outlet respectively connected to the first mixing chamber and the second mixing chamber, the first diverter is provided with a diverter chamber connected to the first air inlet channel; a second main body, the second main body is superimposed on the first main body, the second main body is provided with a third mixing chamber connected to the diverter chamber, the end of the third mixing chamber away from the first main body is in a closed state, and the second main body is provided with a second fire hole.

[0008] The segmented combustion device described in the present invention has the following beneficial effects compared with the background technology: during use, the gas and air mixture can be selectively or simultaneously introduced into the first air inlet channel and the second air inlet channel. When the mixed gas is introduced into the first air inlet channel, the mixed gas flows into the diverter chamber, and under the action of the diverter chamber, flows into the third mixing chamber; the airflow flowing into the third mixing chamber finally flows out from the second fire hole of the second body. When the mixed gas is introduced into the second air inlet channel, the mixed gas flows into the second mixing chamber; then flows into the first mixing chamber from the first air outlet on the gas diverter; and finally flows out from the first fire hole on the first body. In this way, the mixed gas flows out from different height positions, effectively meeting the user's needs for different load combustion, and realizing the segmented combustion of the combustion device. In the process of air intake, the segmented combustion device uses the first diverter to form a second mixing chamber in the gas diverter, so that the mixed gas entering from the second air inlet channel does not directly enter the first mixing chamber, but returns to enter the gas diverter, and then flows into the first mixing chamber from the first air outlet on the gas diverter. This effectively extends the flow path of the mixed gas, allows the gas and air to be fully mixed, improves the mixing uniformity of the gas, and is beneficial to improving the staged combustion characteristics.

[0009] In one embodiment, there are more than two second air inlet passages, and the more than two second air inlet passages are arranged at intervals along the periphery of the first air inlet passage.

[0010] In one embodiment, there are a plurality of first air outlet holes, and one of the first air outlet holes is provided between any two adjacent second air inlet channels.

[0011] In one embodiment, the cross-sectional area S1 of the diverter cavity gradually increases from one end of the diverter cavity close to the first air inlet channel to one end of the diverter cavity close to the second body.

[0012] In one embodiment, a cross-sectional area S2 of an outer side surface of the first flow diverter facing away from the flow diverter cavity gradually increases from an end of the first flow diverter close to the first air inlet channel to an end of the first flow diverter close to the second body.

[0013] In one embodiment, a mounting surface is provided in the gas divider, and the mounting surface is extended along the periphery of the first air inlet channel. A first flange is provided on the first flow divider, and the first flange is extended along the periphery of the flow divider cavity, and the first flange is attached to the mounting surface.

[0014] In one of the embodiments, the staged combustion device further includes a seal, and the seal is disposed between the first flange and the mounting surface.

[0015] In one embodiment, the first air inlet passage includes a first ejection section, a first contraction section and a first mixing section which are connected in sequence, the first mixing section is connected to the diversion chamber, and the cross-sectional area S3 of the first contraction section gradually decreases from one end of the first contraction section close to the first ejection section to one end of the first contraction section close to the first mixing section.

[0016] In one embodiment, the second air inlet passage includes a second ejection section, a second contraction section and a second mixing section which are connected in sequence, the second mixing section is connected to the second mixing chamber, and the cross-sectional area S4 of the second contraction section gradually decreases from one end of the second contraction section close to the second ejection section to one end of the second contraction section close to the second mixing section.

[0017] In one of the embodiments, the staged combustion device further comprises a cover, which closes an end of the third mixing chamber away from the first body.

[0018] In one embodiment, the segmented combustion device also includes a second diverter, which is embedded in the second main body and divides the third mixing chamber into a first split chamber and a second split chamber surrounding the first split chamber, the first split chamber is connected to the diverter chamber, the second split chamber is connected to the second fire hole, and the second diverter is provided with a second air outlet hole respectively connected to the first split chamber and the second split chamber.

[0019] In one embodiment, the first diverter is provided with a second flange, the second flange is extended along the periphery of the diverter cavity, the second diverter is provided with a third flange, the third flange is extended along the periphery of the first split cavity, the third flange is attached to the second flange, and is attached to the edge of the first main body.

[0020] The above second technical problem is solved by the following technical solution:

[0021] A gas water heater, comprising any one of the above described segmented combustion devices.

[0022] The gas water heater of the present invention has the following beneficial effects compared with the background technology: the above segmented combustion device is adopted, and during use, the gas and air mixed gas can be selectively or simultaneously introduced into the first air inlet channel and the second air inlet channel. When the mixed gas is introduced into the first air inlet channel, the mixed gas flows into the diverter chamber, and under the action of the diverter chamber, flows into the third mixing chamber; the airflow flowing into the third mixing chamber finally flows out from the second fire hole of the second body. When the mixed gas is introduced into the second air inlet channel, the mixed gas flows into the second mixing chamber; then flows into the first mixing chamber from the first air outlet on the gas diverter; and finally flows out from the first fire hole on the first body. In this way, the mixed gas flows out from different height positions, effectively meeting the user's different load combustion needs, and realizing the segmented combustion of the combustion device. In the process of air intake, the segmented combustion device uses the first diverter to form a second mixing chamber in the gas diverter, so that the mixed gas entering from the second air inlet channel does not directly enter the first mixing chamber, but returns to enter the gas diverter, and then flows into the first mixing chamber from the first air outlet on the gas diverter. This effectively extends the flow path of the mixed gas, allows the gas and air to be fully mixed, improves the mixing uniformity of the gas, and is beneficial to improving the staged combustion characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic structural diagram of a segmented combustion device described in an embodiment;

[0026] Figure 2 It is a schematic diagram of the explosion of the structure of a segmented combustion device described in one embodiment;

[0027] Figure 3 A schematic diagram of the bottom structure of a segmented combustion device according to an embodiment;

[0028] Figure 4 It is a cross-sectional view of the structure of a segmented combustion device described in one embodiment.

[0029] Reference numerals:

[0030] 100, segmented combustion device; 110, first main body; 111, first fire hole; 112, first mixing chamber; 113, fourth flange; 120, gas distribution; 121, first air inlet channel; 1211, first injection section; 1212, first contraction section; 1213, first mixing section; 122, second air inlet channel; 1221, second injection section; 1222, second contraction section; 1223, second mixing section; 123, first air outlet; 124, second mixing chamber; 125 , air distribution part; 126, air inlet part; 127, mounting surface; 1271, groove; 130, first diverter; 131, diverter cavity; 132, first flange; 133, second flange; 140, second main body; 141, third mixing cavity; 1411, first split cavity; 1412, second split cavity; 142, second fire hole; 143, fifth flange; 150, second diverter; 151, second air outlet; 152, third flange; 160, sealing member; 170, cover. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 4 A segmented combustion device 100, the segmented combustion device 100 includes: a first main body 110, a gas distributor 120, a first flow divider 130 and a second main body 140. The first main body 110 is provided with a first fire hole 111. The gas distributor 120 is embedded in the first main body 110, and a first mixing chamber 112 is formed between the gas distributor 120 and the first main body 110, and a first air inlet channel 121 and a second air inlet channel 122 are provided on the gas distributor 120. The first flow divider 130 is embedded in the gas distributor 120, and a second mixing chamber 124 connected to the second air inlet channel 122 is formed between the gas distributor 120 and the gas distributor 120. The gas distributor 120 is provided with a first air outlet 123 connected to the first mixing chamber 112 and the second mixing chamber 124 respectively. The first flow divider 130 is provided with a flow divider chamber 131 connected to the first air inlet channel 121. The second body 140 is stacked on the first body 110, and a third mixing chamber 141 is provided in the second body 140 and communicates with the diversion chamber 131. The end of the third mixing chamber 141 away from the first body 110 is in a closed state. A second fire hole 142 is provided on the second body 140.

[0033] In the above-mentioned segmented combustion device 100, during use, the gas and air mixture can be selectively or simultaneously introduced into the first air inlet channel 121 and the second air inlet channel 122. When the mixed gas is introduced into the first air inlet channel 121, the mixed gas flows into the diverter chamber 131, and under the action of the diverter chamber 131, flows into the third mixing chamber 141; the airflow flowing into the third mixing chamber 141 finally flows out from the second fire hole 142 of the second body 140. When the mixed gas is introduced into the second air inlet channel 122, the mixed gas flows into the second mixing chamber 124; then flows into the first mixing chamber 112 from the first air outlet 123 on the gas diverter 120; and finally flows out from the first fire hole 111 on the first body 110. In this way, the mixed gas flows out from different height positions, effectively meeting the user's needs for different load combustion, and realizing segmented combustion of the combustion device. During the intake process of the segmented combustion device 100, the first flow divider 130 is used to form a second mixing chamber 124 in the segmented gas 120, so that the mixed gas entering through the second intake channel 122 does not directly enter the first mixing chamber 112, but returns to enter the segmented gas 120, and then flows into the first mixing chamber 112 through the first gas outlet 123 on the segmented gas 120. In this way, the flow path of the mixed gas is effectively extended, the gas and air are fully mixed, the mixing uniformity of the gas is improved, and the segmented combustion characteristics are improved.

[0034] It should be noted that the number of the first air inlet channels 121 can be determined based on the heat load of the gas water heater and the overlapping value of the segmented gaps, and is not specifically limited in this embodiment. At the same time, in order to facilitate the application of the segmented combustion device 100 to a cylindrical gas water heater, the first body 110 and the second body 140 can be designed to be cylindrical (e.g., cylindrical).

[0035] Optionally, the first fire hole 111 may be, but not limited to, a circular hole, a bar hole, an elliptical hole, a polygonal hole, or other holes of different shapes; of course, the first fire hole 111 may also be a combination of holes of various shapes. Similarly, the second fire hole 142 may be, but not limited to, a circular hole, a bar hole, an elliptical hole, a polygonal hole, or other holes of different shapes; of course, the second fire hole 142 may also be a combination of holes of various shapes. In addition, there are many ways to arrange the first fire holes 111 on the first body, as long as the mixed gas flows out.

[0036] For further information, please refer to Figure 3 , there are more than two second air intake channels 122. The more than two second air intake channels 122 are arranged at intervals along the periphery of the first air intake channel 121. It can be seen that the mixed gas introduced from the second air intake channel 122 is evenly surrounded by the periphery of the first air intake channel 121, which is conducive to ensuring that the mixed gas flows out evenly on the first body 110, further improving the stability of combustion.

[0037] Specifically, please refer to Figure 3 The number of the second air inlet channels 122 is four, and the four second air inlet channels 122 are evenly spaced apart along the periphery of the first air inlet channel 121 .

[0038] In one embodiment, please refer to Figure 2 , there are multiple first air outlet holes 123. A first air outlet hole 123 is provided between any two adjacent second air inlet channels 122. It can be seen that the first air outlet hole 123 and the second air inlet channel 122 on the gas separator 120 are arranged in a staggered manner, that is, the mixed gas flowing out of the second air inlet channel 122 will not flow out directly from the first air outlet hole 123, ensuring that the mixed gas has a certain residence time in the second mixing chamber 124, thereby improving the mixing uniformity between the gas and the air. At the same time, a first air outlet hole 123 is provided between any two adjacent second air inlet channels 122, which is conducive to the uniform outflow of the mixed gas from the gas separator 120, thereby ensuring the uniformity of the gas on the first body 110.

[0039] It should be noted that the first air outlet 123 on the gas separator 120 has various shapes, for example: the first air outlet 123 can be a circular hole, a bar hole, an elliptical hole, a polygonal hole or other irregular holes; of course, the first air outlet 123 can also be a combination of holes of various shapes.

[0040] In one embodiment, please refer to Figure 2 The gas distributor 120 includes an air inlet 126 and an air distributor 125 connected to the air inlet 126. The first air inlet channel 121 and the second air inlet channel 122 are both disposed on the air inlet 126. The first flow divider 130 is embedded in the air distributor 125, and a second mixing chamber 124 is formed between the first flow divider 130 and the air distributor 125. The first air outlet 123 is disposed on the air distributor 125.

[0041] In one embodiment, please refer to Figure 4 The cross-sectional area S1 of the diverter cavity 131 gradually increases from one end of the diverter cavity 131 close to the first air inlet channel 121 to one end of the diverter cavity 131 close to the second body 140, that is, the diverter cavity 131 is a pressure diffusion section relative to the flow of the fuel gas. When the mixed gas flows from the first air inlet channel 121 into the diverter cavity 131, the pressure diffusion design of the diverter cavity 131 will cause the flow velocity of the mixed gas to decrease, so that the mixed gas meets the working pressure required by the staged combustion device 100.

[0042] In one embodiment, please refer to Figure 4The cross-sectional area S2 of the outer side of the first flow diverter 130 facing away from the flow diverter cavity 131 gradually increases from the end of the first flow diverter 130 close to the first air inlet channel 121 to the end of the first flow diverter 130 close to the second body 140, that is, the outer side of the first flow diverter 130 is funnel-shaped. When the mixed gas flows along the outer side of the first flow diverter 130 toward the second body 140, the funnel-shaped outer side will press the mixed gas toward the first gas outlet 123 on the gas diverter 120; at the same time, as the mixed gas flows, the pressure on the mixed gas is greater, ensuring that the mixed gas in the second mixing cavity 124 flows out of the first gas outlet 123.

[0043] In one embodiment, please refer to Figure 4 , a mounting surface 127 is provided in the gas splitter 120. The mounting surface 127 is extended along the periphery of the first air inlet channel 121. A first flange 132 is provided on the first flow splitter 130. The first flange 132 is extended along the periphery of the flow splitter cavity 131. The first flange 132 is attached to the mounting surface 127, so that the first flow splitter 130 is stably installed in the gas splitter 120.

[0044] For further information, please refer to Figure 2 The staged combustion device 100 further includes a seal 160 . The seal 160 is disposed between the first flange 132 and the mounting surface 127 to ensure that the gas distributor 120 and the first flow distributor 130 are tightly coupled to prevent the gas in the first air inlet channel 121 from leaking into the second mixing chamber 124 .

[0045] For further information, please refer to Figure 4 The mounting surface 127 is provided with a groove 1271 . The groove 1271 is extended along the periphery of the first air inlet passage 121 . The sealing member 160 is installed in the groove 1271 .

[0046] In one embodiment, please refer to Figure 4 The first air inlet passage 121 includes a first ejection section 1211, a first contraction section 1212 and a first mixing section 1213 which are connected in sequence. The first mixing section 1213 is connected to the diversion chamber 131. The cross-sectional area S2 of the first contraction section 1212 gradually decreases from one end of the first contraction section 1212 close to the first ejection section 1211 to one end of the first contraction section 1212 close to the first mixing section 1213. When the mixed gas flows from the first ejection section 1211 into the first contraction section 1212, it will be gradually accelerated by the action of the first contraction section 1212, and a suction effect will be formed at one end of the first ejection section 1211, so that more primary air will be sucked in to ensure that the gas is fully burned. At the same time, the sucked gas and air are premixed in the first contraction section 1212 and the first mixing section 1213, so that the gas and air are more fully mixed, and the combustion characteristics of the staged combustion device 100 are further improved.

[0047] In one embodiment, please refer to Figure 4 The second air inlet passage 122 includes a second ejection section 1221, a second contraction section 1222, and a second mixing section 1223 which are connected in sequence. The second mixing section 1223 is connected to the second mixing chamber 124. The cross-sectional area S4 of the second contraction section 1222 gradually decreases from one end of the second contraction section 1222 close to the second ejection section 1221 to one end of the second contraction section 1222 close to the second mixing section 1223. In this way, when the mixed gas flows from the second ejection section 1221 into the second contraction section 1222, it will be gradually accelerated by the action of the second contraction section 1222, and a suction effect will be formed at one end of the second ejection section 1221, so that more primary air will be sucked in to ensure full combustion of the gas.

[0048] For further information, please refer to Figure 4 , the second mixing section 1223 is cylindrical, and the height h of the second mixing section 1223 is 1 to 5 times the inner diameter d of the second mixing section 1223. If the length of the second mixing section 1223 is too long, its internal resistance will increase, the gas flow rate will be reduced, and the primary air intake volume will be reduced. If the length of the second mixing section 1223 is too short, the gas and air cannot be fully mixed. Therefore, this embodiment effectively ensures that the gas and air are more fully mixed by reasonably controlling the size of the second mixing section 1223.

[0049] In one embodiment, please refer to Figure 2 The staged combustion device 100 further includes a cover 170. The cover 170 seals one end of the third mixing chamber 141 away from the first body 110. Thus, the cover 170 seals one end of the third mixing chamber 141, ensuring that the mixed gas entering the third mixing chamber 141 flows out from the second fire hole 142.

[0050] In one embodiment, please refer to Figure 4, the segmented combustion device 100 also includes a second flow divider 150. The second flow divider 150 is embedded in the second main body 140, and divides the third mixing chamber 141 into a first split chamber 1411 and a second split chamber 1412 surrounding the first split chamber 1411. The first split chamber 1411 is connected to the flow divider 131. The second split chamber 1412 is connected to the second fire hole 142, and the second flow divider 150 is provided with a second gas outlet 151 connected to the first split chamber 1411 and the second split chamber 1412 respectively. It can be seen that when the mixed gas enters the first air inlet channel 121, the mixed gas flows through the split chamber 131, the first split chamber 1411 and the second split chamber 1412 in sequence; finally, it flows out of the second fire hole 142 from the second split chamber 1412 and burns. In this embodiment, the third mixing chamber 141 is divided into two inner and outer chambers by using the second flow divider 150, which effectively changes the flow path of the mixed gas in the second body 140, prolongs its residence time, and ensures that the gas and air are fully mixed.

[0051] For further information, please refer to Figure 2 The first flow diverter 130 is provided with a second flange 133. The second flange 133 is extended along the periphery of the flow diverter cavity 131. The second flow diverter 150 is provided with a third flange 152. The third flange 152 is extended along the periphery of the first split cavity 1411. The third flange 152 is attached to the second flange 133 and to the edge of the first body 110, so that the first flow diverter 130 and the second flow diverter 150 are stably combined, thereby improving the stability of the structure of the staged combustion device 100.

[0052] For further information, please refer to Figure 2 , a fourth flange 113 is provided on the first body 110. The fourth flange 113 is extended along the edge of the first body 110, and the second flange 133 and the fourth flange 113 are both attached to the third flange 152. In addition, a fifth flange 143 is provided on the second body 140. The fifth flange 143 is attached to a side surface of the third flange 152 that is away from the fourth flange 113.

[0053] In one embodiment, please refer to Figure 1 and Figure 2 , a gas water heater, the gas water heater comprises the segmented combustion device 100 in any one of the above embodiments.

[0054] The above-mentioned gas water heater adopts the above-mentioned segmented combustion device 100. During use, the gas and air mixture can be selectively or simultaneously introduced into the first air inlet channel 121 and the second air inlet channel 122. When the mixed gas is introduced into the first air inlet channel 121, the mixed gas flows into the diverter chamber 131, and under the action of the diverter chamber 131, flows into the third mixing chamber 141; the airflow flowing into the third mixing chamber 141 finally flows out from the second fire hole 142 of the second body 140. When the mixed gas is introduced into the second air inlet channel 122, the mixed gas flows into the second mixing chamber 124; then flows into the first mixing chamber 112 from the first air outlet 123 on the gas diverter 120; and finally flows out from the first fire hole 111 on the first body 110. In this way, the mixed gas flows out from different height positions, effectively meeting the user's needs for different load combustion, and realizing segmented combustion of the combustion device. During the intake process of the segmented combustion device 100, the first flow divider 130 is used to form a second mixing chamber 124 in the segmented gas 120, so that the mixed gas entering through the second intake channel 122 does not directly enter the first mixing chamber 112, but returns to enter the segmented gas 120, and then flows into the first mixing chamber 112 through the first gas outlet 123 on the segmented gas 120. In this way, the flow path of the mixed gas is effectively extended, the gas and air are fully mixed, the mixing uniformity of the gas is improved, and the segmented combustion characteristics are improved.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0059] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A staged combustion device, characterized in that: The staged combustion device (100) comprises: A first main body (110), wherein a first fire hole (111) is provided on the first main body (110); A gas separator (120), the gas separator (120) being embedded in the first main body (110) and forming a first mixing chamber (112) between the gas separator (120) and the first main body (110), and a first air inlet channel (121) and a second air inlet channel (122) being spaced apart on the gas separator (120); a first flow divider (130), the first flow divider (130) being embedded in the gas divider (120) and forming a second mixing chamber (124) communicating with the second gas inlet channel (122) between the first flow divider and the gas divider (120); the gas divider (120) being provided with a first gas outlet (123) respectively communicating with the first mixing chamber (112) and the second mixing chamber (124); and the first flow divider (130) being provided with a flow divider chamber (131) communicating with the first gas inlet channel (121); a second body (140), the second body (140) being stacked on the first body (110), a third mixing chamber (141) being arranged in the second body (140) and communicating with the diversion chamber (131), the end of the third mixing chamber (141) away from the first body (110) being in a closed state, and a second fire hole (142) being arranged on the second body (140); A cross-sectional area S1 of the diverter cavity (131) gradually increases from an end of the diverter cavity (131) close to the first air inlet channel (121) to an end of the diverter cavity (131) close to the second body (140); The segmented combustion device (100) further comprises a second flow divider (150), wherein the second flow divider (150) is embedded in the second main body (140) and divides the third mixing chamber (141) into a first split chamber (1411) and a second split chamber (1412) surrounding the first split chamber (1411), wherein the first split chamber (1411) is connected to the flow divider chamber (131), and the second split chamber (1412) is connected to the second fire hole (142), and the second flow divider (150) is provided with a second air outlet (151) respectively connected to the first split chamber (1411) and the second split chamber (1412).

2. The staged combustion device according to claim 1, characterized in that: There are more than two second air intake channels (122), and the more than two second air intake channels (122) are arranged at intervals along the periphery of the first air intake channel (121).

3. The staged combustion device according to claim 2, characterized in that: There are a plurality of first air outlet holes (123), and one of the first air outlet holes (123) is provided between any two adjacent second air inlet channels (122).

4. The staged combustion device according to claim 1, characterized in that: The cross-sectional area S2 of the outer side surface of the first flow diverter (130) facing away from the flow diverter cavity (131) gradually increases from one end of the first flow diverter (130) close to the first air inlet channel (121) to one end of the first flow diverter (130) close to the second body (140).

5. The staged combustion device according to claim 1, characterized in that: The gas distributor (120) is provided with a mounting surface (127), and the mounting surface (127) is extended along the periphery of the first air inlet channel (121). The first flow distributor (130) is provided with a first flange (132), and the first flange (132) is extended along the periphery of the flow distributor cavity (131), and the first flange (132) is attached to the mounting surface (127).

6. The staged combustion device according to claim 5, characterized in that: The staged combustion device (100) further comprises a sealing member (160), wherein the sealing member (160) is arranged between the first flange (132) and the mounting surface (127).

7. The staged combustion device according to any one of claims 1 to 6, characterized in that: The first air inlet passage (121) comprises a first ejection section (1211), a first contraction section (1212) and a first mixing section (1213) which are connected in sequence, the first mixing section (1213) being connected to the diversion chamber (131), and a cross-sectional area S3 of the first contraction section (1212) gradually decreases from one end of the first contraction section (1212) close to the first ejection section (1211) to one end of the first contraction section (1212) close to the first mixing section (1213).

8. The staged combustion device according to any one of claims 1 to 6, characterized in that: The second air inlet passage (122) comprises a second ejection section (1221), a second contraction section (1222) and a second mixing section (1223) which are connected in sequence, the second mixing section (1223) is connected to the second mixing chamber (124), and a cross-sectional area S4 of the second contraction section (1222) gradually decreases from one end of the second contraction section (1222) close to the second ejection section (1221) to one end of the second contraction section (1222) close to the second mixing section (1223); and / or, The staged combustion device (100) further comprises a sealing cover (170), wherein the sealing cover (170) closes an end of the third mixing chamber (141) away from the first body (110).

9. The staged combustion device according to any one of claims 1 to 6, characterized in that: The first flow diverter (130) is provided with a second flange (133), and the second flange (133) is extended along the periphery of the flow diverter cavity (131). The second flow diverter (150) is provided with a third flange (152), and the third flange (152) is extended along the periphery of the first split cavity (1411). The third flange (152) is attached to the second flange (133) and to the edge of the first main body (110).

10. A gas water heater, characterized in that: The gas water heater comprises the segmented combustion device (100) according to any one of claims 1 to 9.

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