Combustion device and gas water heater

Abstract

The present invention relates to a combustion device and a gas water heater. During the combustion process, air enters the first airflow chamber under the action of a fan. The air entering the first airflow chamber is divided into two parts. One part of the air flows into the second airflow chamber from the wind control hole; the other part continues to diffuse in the first airflow chamber. Among them, the air entering the second airflow chamber will flow into the air flow channel to participate in the combustion on the combustion body as secondary air, so that the gas is fully burned, the emission content in the smoke is reduced, and the gas water heater is more environmentally friendly. In addition, for the air diffused in the first airflow chamber, because the air supply component supplies air into the ejector tube, under the action of ejection and under the action of positive pressure, the air in the first airflow chamber is sucked into the ejector tube together to complete the mixing between part of the air and the gas.

Description

Technical Field

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

[0002] Gas water heaters are generally composed of structures such as combustion devices and heat exchanger devices. The combustion devices generally include atmospheric combustion devices and full premix combustion devices. When the atmospheric combustion device is used in a forced-draft gas water heater, the fan device and the burner assembly are generally set separately, that is, the fan device is above the heat exchanger device, and the burner assembly is below the heat exchanger device. However, such a setting is not conducive to the integration of components, resulting in the inability to reasonably arrange and utilize the space of the entire machine, causing the gas water heater to be too large and not conducive to miniaturization. When the atmospheric combustion device is used in a forced-blast gas water heater, the combustion device is below the heat exchanger device, and the air is blown upwards during operation, which makes it difficult for the condensed water in the heat exchanger device or the condenser to fall off. At the same time, due to the unreasonable structural design of the traditional air supply system, its air supply efficiency is reduced, which in turn affects the improvement of the heat exchange effect. Summary of the invention

[0003] The first technical problem solved by the present invention is to provide a combustion device which can effectively improve air supply efficiency, combustion efficiency and heat exchange efficiency; at the same time, ensure the reasonable layout of the whole machine space, which is conducive to the miniaturization of the gas water heater.

[0004] The second technical problem solved by the present invention is to provide a gas water heater which can effectively improve air supply efficiency, combustion efficiency and heat exchange efficiency; at the same time, ensure the reasonable layout of the whole machine space, which is conducive to the miniaturization of the gas water heater.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A combustion device, the combustion device comprising: a guide cover, the guide cover is provided with a wind control plate, the wind control plate divides the guide cover into a first airflow chamber and a second airflow chamber, and the wind control plate is provided with wind control holes; a combustion assembly, the combustion assembly comprises a combustion body and an ejector pipe, the combustion body is located in the second airflow chamber, the combustion body is provided with an air flow channel and a gas flow channel, the ejector pipe is installed on the combustion body and communicated with the gas flow channel, one end of the ejector pipe passes through the wind control plate and extends into the first airflow chamber; a fan and an air supply assembly, the fan and the air supply assembly are both installed on the guide cover, the air outlet end of the fan and the air supply end of the air supply assembly are both communicated with the first airflow chamber, and the air supply assembly is used to connect to an external air source.

[0007] The combustion device described in the present invention has the following beneficial effects compared with the background technology: during the combustion process, the air enters the first airflow cavity under the action of the fan. The air entering the first airflow cavity is divided into two parts, one part of the air flows into the second airflow cavity from the air control hole; the other part continues to diffuse in the first airflow cavity. Among them, the air entering the second airflow cavity will flow into the air flow channel to participate in the combustion on the combustion body as secondary air, so that the gas is fully burned, the emission content in the flue gas is reduced, and the gas water heater is more environmentally friendly. In addition, for the air diffused in the first airflow cavity, when the air supply component supplies air to the ejector pipe, under the action of ejection and under the action of positive pressure, the air in the first airflow cavity is sucked into the ejector pipe together to complete the mixing between part of the air and the gas. It can be seen from this that the combustion device reasonably uses the deflector and the air control plate to divide the air flow into two parts, complete the secondary air supply, and complete the premixing between air and gas, so as to effectively improve the air supply efficiency of the gas water heater, improve the combustion condition, and thus improve the combustion efficiency. In addition, since the air deflector and the wind control plate can simultaneously complete two air distribution processes, the structural layout on the combustion device is effectively reduced, making the overall space layout reasonable and ensuring that the overall structure is more compact, which is conducive to the miniaturization of the gas water heater.

[0008] In one embodiment, the first airflow cavity includes a first split cavity and a second split cavity that are interconnected, the first split cavity is distributed away from the wind control plate relative to the second split cavity, and the cross-sectional area S1 of the first split cavity is smaller than the cross-sectional area S2 of the second split cavity, the air outlet end of the fan is connected to the second split cavity, the air supply end of the air supply assembly is connected to the first split cavity, and one end of the ejector tube extends into the first split cavity.

[0009] In one embodiment, the air deflector includes a first shell and a second shell, the first shell is connected to the second shell, the wind control plate is arranged in the second shell, and divides the second shell into the second airflow chamber and the second split chamber, the first split chamber is arranged in the first shell, the fan is installed on the second shell, and the air supply assembly is installed on the first shell.

[0010] In one embodiment, the combustion device further includes a first regulating valve, the air supply assembly is used to communicate with an external air source through the first regulating valve, and the first regulating valve and the fan are both mounted on the second shell and are respectively located on opposite sides of the first shell.

[0011] In one embodiment, the air supply assembly includes a second regulating valve, an air intake pipe and a nozzle, the air intake pipe is connected to the first regulating valve, the nozzle is connected to the air intake pipe, the injection end of the nozzle is located in the first split cavity and is arranged toward the nozzle of the ejection pipe, and the second regulating valve is used to adjust the air flow on the nozzle.

[0012] In one of the embodiments, a cooling hole is provided on the combustion body, the cooling hole is communicated with the second air flow cavity, and the cooling hole is arranged close to the cavity wall of the second air flow cavity.

[0013] In one of the embodiments, one end of the deflector cover is pressed onto the edge of the combustion body, and a first sealing member is provided between the deflector cover and the combustion body.

[0014] In one embodiment, there are at least two gas flow channels, at least two of which are spaced apart in the radial direction of the combustion body, and in any two adjacent gas flow channels, one of the gas flow channels is arranged around the periphery of the other gas flow channel, the gas flow channel is connected to at least one ejector pipe, and the air flow channel is arranged between the two adjacent gas flow channels.

[0015] In one embodiment, the combustion assembly further includes an ignition assembly, and the ignition assembly is mounted on the combustion body.

[0016] The above second technical problem is solved by the following technical solution:

[0017] A gas water heater comprises a heat exchange body and any one of the above combustion devices, wherein a combustion chamber is provided in the heat exchange body, the heat exchange body is installed below the combustion body, and the combustion chamber is communicated with the second airflow chamber.

[0018] The gas water heater of the present invention has the following beneficial effects compared with the background technology: using the above combustion device, during the combustion process, the air enters the first airflow cavity under the action of the fan. The air entering the first airflow cavity is divided into two parts, one part of the air flows into the second airflow cavity from the air control hole; the other part continues to diffuse in the first airflow cavity. Among them, the air entering the second airflow cavity will flow into the air flow channel to participate in the combustion on the combustion body as secondary air, so that the gas is fully burned, the emission content in the flue gas is reduced, and the gas water heater is more environmentally friendly. In addition, for the air diffused in the first airflow cavity, when the air supply component supplies air to the ejector pipe, under the action of ejection and under the action of positive pressure, the air in the first airflow cavity is sucked into the ejector pipe together to complete the mixing between part of the air and the gas. It can be seen from this that the combustion device reasonably uses the deflector and the air control plate to divide the air flow into two parts, completing both the secondary air supply and the premixing between the air and the gas, so as to effectively improve the air supply efficiency of the gas water heater. In addition, since the air deflector and the wind control plate can simultaneously complete two air distribution processes, the structural layout on the combustion device is effectively reduced, making the overall space layout reasonable and ensuring that the overall structure is more compact, which is conducive to the miniaturization of the gas water heater.

[0019] In one of the embodiments, a guide portion is provided on the cavity wall of the combustion chamber close to the combustion body, and a diameter D of the guide portion decreases from an end of the guide portion close to the combustion body to an end of the guide portion away from the combustion body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] 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.

[0022] Figure 1 It is a schematic diagram of the structure of a gas water heater described in one embodiment;

[0023] Figure 2 It is a schematic diagram of an explosion of a gas water heater structure according to an embodiment;

[0024] Figure 3 It is a schematic diagram of explosion of the combustion device structure described in one embodiment;

[0025] Figure 4 A cross-sectional view of the combustion device structure in one embodiment;

[0026] Figure 5 for Figure 4 Schematic diagram of the structure at A in the middle circle;

[0027] Figure 6 It is a schematic diagram of the structure of a deflector cover described in an embodiment.

[0028] Reference numerals:

[0029] 100, combustion device; 110, fan; 120, air guide cover; 121, first shell; 1211, opening; 122, second shell; 123, first air flow cavity; 1231, first split cavity; 1232, second split cavity; 124, second air flow cavity; 125, first sealing member; 126, mounting groove; 127, boss; 128, air inlet; 130, air supply assembly; 131, second regulating valve; 132, air inlet pipe; 133, mounting seat; 134, nozzle ; 135, second sealing member; 140, first regulating valve; 150, wind control plate; 151, wind control hole; 152, mounting hole; 160, combustion assembly; 161, combustion body; 1611, gas flow channel; 1612, air flow channel; 1613, cooling hole; 162, ejector tube; 163, ignition assembly; 164, third sealing member; 200, heat exchange body; 210, combustion chamber; 220, interlayer; 221, guide part; 230, water chamber; 300, smoke exhaust pipe. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In one embodiment, please refer to Figure 1 , Figure 3 and Figure 4A combustion device 100 includes: a guide cover 120, a combustion assembly 160, a fan 110 and an air supply assembly 130. An air control plate 150 is provided in the guide cover 120. The air control plate 150 divides the guide cover 120 into a first air flow chamber 123 and a second air flow chamber 124, and an air control hole 151 is provided on the air control plate 150. The combustion assembly 160 includes a combustion body 161 and an ejector pipe 162. The combustion body 161 is located in the second air flow chamber 124, and an air flow channel 1612 and a gas flow channel 1611 are provided on the combustion body 161. The ejector pipe 162 is installed on the combustion body 161 and communicated with the gas flow channel 1611, and one end of the ejector pipe 162 passes through the air control plate 150 and extends into the first air flow chamber 123. The fan 110 and the air supply assembly 130 are both mounted on the air guide cover 120, and the air outlet end of the fan 110 and the air supply end of the air supply assembly 130 are both connected to the first air flow cavity 123. The air supply assembly 130 is used to connect to an external air source.

[0037] In the combustion process of the above-mentioned combustion device 100, air enters the first airflow chamber 123 under the action of the fan 110. The air entering the first airflow chamber 123 is divided into two parts, one part of the air flows into the second airflow chamber 124 from the air control hole 151; the other part continues to diffuse in the first airflow chamber 123. Among them, the air entering the second airflow chamber 124 will flow into the air flow channel 1612 to participate in the combustion on the combustion body 161 as secondary air, so that the gas is fully burned, the emission content in the flue gas is reduced, and the gas water heater is more environmentally friendly. In addition, for the air diffused in the first airflow chamber 123, when the air supply component 130 supplies air to the ejector pipe 162, under the action of ejection and under the action of positive pressure, the air in the first airflow chamber 123 is sucked into the ejector pipe 162 together to complete the mixing between part of the air and the gas. It can be seen that the combustion device 100 reasonably utilizes the air deflector 120 and the air control plate 150 to divide the air flow into two directions, thereby completing both the secondary air supply and the premixing of air and gas, thereby effectively improving the air supply efficiency of the gas water heater. In addition, since the air deflector 120 and the air control plate 150 can simultaneously complete two air distribution processes, the structural arrangement on the combustion device 100 is effectively reduced, making the overall space arrangement reasonable, ensuring that the overall structure is more compact, and thus facilitating the miniaturization of the gas water heater.

[0038] It should be noted that during use, the combustion device 100 can be installed as a whole above the heat exchange body 200, that is, the fan 110 and the combustion body 161 are both located above the combustion chamber 210. In this way, when blowing, the air flow flows from top to bottom, which is convenient for the condensed water on the heat exchange body 200 or the condenser to fall off, thereby improving the heat exchange effect on the heat exchange body 200.

[0039] It should also be noted that the fan 110 and the air supply assembly 130 of this embodiment have various structures, which are not specifically limited here, and only need to satisfy the requirement of being able to stably provide air and gas to the first airflow chamber 123. For example: the fan 110 can be an axial flow fan or a centrifugal fan. At the same time, there are also various ways to distribute the air control holes 151 on the air control plate 150, such as: a plurality of air control holes 151 are arranged in a matrix on the air control plate 150; or, a plurality of air control holes 151 are distributed in an annular manner from the inside to the outside on the air control plate 150; or, a plurality of air control holes 151 are distributed at irregular intervals on the air control plate 150, etc. In addition, the distribution density of the air control holes 151 on the air control plate 150 can be set according to the distance from the fan 110, for example: the closer the air control plate 150 is to the fan 110, the smaller the distribution density of the air control holes 151 is. Of course, the specific distribution of the air control holes 151 also depends on the actual combustion conditions of the combustion device 100 .

[0040] Optionally, the gas supply component 130 may be a separate gas pipe, a separate nozzle structure, or a nozzle, gas pipe and regulating valve combination structure, etc. Meanwhile, the external gas source of this embodiment is a gas supply device, such as a gas tank and other equipment.

[0041] For further information, please refer to Figure 4 and Figure 6 The first airflow cavity 123 includes a first sub-cavity 1231 and a second sub-cavity 1232 which are connected to each other. The first sub-cavity 1231 is distributed away from the air control plate 150 relative to the second sub-cavity 1232, and the cross-sectional area S1 of the first sub-cavity 1231 is smaller than the cross-sectional area S2 of the second sub-cavity 1232. The air outlet end of the fan 110 is connected to the second sub-cavity 1232. The air supply end of the air supply assembly 130 is connected to the first sub-cavity 1231. One end of the ejector pipe 162 extends into the first sub-cavity 1231. It can be seen that the first airflow chamber 123 of the present embodiment has two parts, and the cross-sectional area S2 of the second sub-cavity 1232 is larger than the cross-sectional area S1 of the first sub-cavity 1231. Therefore, after entering the first airflow chamber 123, the air flows into the first sub-cavity 1231 and the second sub-cavity 1232 respectively according to different flow ratios, so that a larger portion of air flows from the second sub-cavity 1232 into the second airflow chamber 124, ensuring that the combustion on the combustion body 161 is more complete.

[0042] It should be noted that the proportional relationship between the cross-sectional area S1 of the first sub-cavity 1231 and the cross-sectional area S2 of the second sub-cavity 1232 can directly affect the flow ratio between the secondary air and the mixed air, that is, as the difference between the cross-sectional area S2 of the second sub-cavity 1232 and the cross-sectional area S1 of the first sub-cavity 1231 increases, the air flow rate entering the air flow channel 1612 on the combustion body 161 increases. As for the specific proportional relationship between the cross-sectional area S1 of the first sub-cavity 1231 and the cross-sectional area S2 of the second sub-cavity 1232, this embodiment does not limit it, and it can be determined according to the actual product and the required combustion conditions.

[0043] For further information, please refer to Figure 4 The air guide cover 120 includes a first shell 121 and a second shell 122. The first shell 121 is connected to the second shell 122. The air control plate 150 is arranged in the second shell 122, and divides the second shell 122 into a second airflow chamber 124 and a second split chamber 1232. The first split chamber 1231 is arranged in the first shell 121. The fan 110 is installed on the second shell 122. The air supply assembly 130 is installed on the first shell 121. When the combustion device 100 operates normally, the fan 110 transports air into the second shell 122. At this time, a part of the air flows from the second split chamber 1232 into the second airflow chamber 124; the other part of the air flows from the second split chamber 1232 into the first split chamber 1231. At the same time, the gas supply component 130 injects gas to the injection port of the injection pipe 162 under a certain gas pressure, so that the gas is injected from the first split cavity 1231 into the injection pipe 162. Under the injection effect and positive pressure, the surrounding air is driven into the injection pipe 162 for premixing. In this way, the combustion on the combustion body 161 is more complete through premixing and secondary air supplementation.

[0044] Optionally, the shapes of the first shell 121 and the second shell 122 can be designed in a variety of ways, for example, the shape of the first shell 121 can be designed to be cylindrical, truncated cone, cuboid, cube, triangular prism, hemisphere, etc. At the same time, the shape of the second shell 122 can also be designed to be cylindrical, truncated cone, cuboid, cube, triangular prism, etc. In addition, the first shell 121 can be installed on the second shell 122 by bolt connection, bonding, clamping, welding, integrated molding, etc. Among them, the integrated molding method is a molding process such as casting or die casting.

[0045] Specifically, please refer to Figure 4 and Figure 6 The second shell 122 is provided with an air inlet 128 communicating with the second split cavity 1232 . The fan 110 is mounted on the second shell 122 , and an air outlet end of the fan 110 is communicated with the air inlet 128 .

[0046] In one embodiment, please refer to Figure 3 The wind control plate 150 is provided with a mounting hole 152, and one end of the ejector tube 162 passes through the mounting hole 152 and extends into the first sub-cavity 1231. In this way, the ejector tube 162 can better penetrate the wind control plate 150 through the mounting hole 152, ensuring that one end of the ejector tube 162 acts stably in the first sub-cavity 1231.

[0047] Specifically, please refer to Figure 3 The size of the mounting hole 152 should be consistent with the outer circumferential size of the ejector tube 162, so that the installation of the ejector tube 162 on the wind control plate 150 is more stable.

[0048] For further information, please refer to Figure 3 There are multiple mounting holes 152 and multiple ejector tubes 162 , and the mounting holes 152 and the ejector tubes 162 are arranged one by one. In this way, the multiple ejector tubes 162 can stably penetrate the wind control plate 150 and extend into the first split cavity 1231 .

[0049] In one embodiment, please refer to Figure 1 , the combustion device 100 also includes a first regulating valve 140. The gas supply component 130 is used to communicate with an external gas source through the first regulating valve 140. The first regulating valve 140 and the fan 110 are both installed on the second shell 122 and are respectively located on opposite sides of the first shell 121. In this way, the first regulating valve 140 is added between the gas supply component 130 and the external gas source, so that the gas flow on the gas supply component 130 can be effectively adjusted, and the firepower adjustment of the combustion device 100 is achieved, ensuring that the combustion load on the combustion body 161 can be adjusted according to actual needs. In addition, the first regulating valve 140 and the fan 110 are respectively located on opposite sides of the first shell 121, so that the structure of the combustion device 100 is reasonably arranged, ensuring that the structure of the combustion device 100 is more compact and smaller in size, which is conducive to the miniaturization of the gas water heater.

[0050] Optionally, the first regulating valve 140 may be a proportional valve, a solenoid valve, a stop valve or other valve devices.

[0051] Specifically, please refer to Figure 1 , the first regulating valve 140 is a proportional valve.

[0052] Optionally, the fan 110 and the first regulating valve 140 are respectively installed on the second housing 122 by bolt connection, clamping, pin connection, welding, riveting, etc.

[0053] For further information, please refer to Figure 3 and Figure 4, the gas supply assembly 130 includes a second regulating valve 131, an air intake pipe 132 and a nozzle 134. The air intake pipe 132 is connected to the first regulating valve 140. The nozzle 134 is connected to the air intake pipe 132, and the injection end of the nozzle 134 is located in the first split cavity 1231 and is arranged toward the nozzle of the ejector pipe 162. The second regulating valve 131 is used to adjust the gas flow on the nozzle 134. It can be seen that in the normal combustion process, by reasonably adjusting the first regulating valve 140, the gas flows into the air intake pipe 132; then adjusting the second regulating valve 131, the gas in the air intake pipe 132 flows into the nozzle 134; finally, the gas is sprayed into the ejector pipe 162 through the first split cavity 1231 through the nozzle 134. In this way, the present embodiment realizes dual flow regulation through the first regulating valve 140 and the second regulating valve 131, so that the gas flow in the nozzle 134 is accurately controlled, which is conducive to accurately controlling the firepower on the combustion body 161.

[0054] Specifically, please refer to Figure 3 , the second regulating valve 131 is a solenoid valve.

[0055] For further information, please refer to Figure 3 , the gas supply assembly 130 further includes a mounting seat 133. An opening 1211 is provided at one end of the first shell 121 away from the second shell 122. The mounting seat 133 is mounted on the first shell 121 and covers the opening 1211. The nozzle 134 is mounted on a side surface of the mounting seat 133 facing the first sub-cavity 1231, so that the gas in the nozzle 134 is stably sprayed into the ejector pipe 162. At the same time, in order to improve the air tightness of the combustion device 100, a second sealing member 135 is provided between the mounting seat 133 and the first shell 121 to prevent the gas in the first sub-cavity 1231 from leaking from between the mounting seat 133 and the first shell 121.

[0056] In one embodiment, please refer to Figure 3 , the nozzles 134 and the ejector tubes 162 are both multiple. The multiple nozzles 134 are arranged at intervals along the length direction of the mounting seat 133, and the multiple nozzles 134 are all connected to the air inlet pipe 132. In this way, through the multiple nozzles 134, the airflow is divided into multiple airflows and enters the corresponding ejector tubes 162 respectively. Among them, the number of ejector tubes 162 and the number of nozzles 134 can be set one to one, or multiple to one.

[0057] In one embodiment, please refer to Figure 3 The ejector tube 162 is vertically arranged on the combustion body 161, which is conducive to facilitating the ejection of primary air, ensuring the amount of primary air required for combustion, making the combustion more complete, and thus reducing the generation of emissions.

[0058] In one embodiment, please refer to Figure 4 and Figure 5 , a cooling hole 1613 is provided on the combustion body 161. The cooling hole 1613 is connected to the second airflow cavity 124, and the cooling hole 1613 is arranged close to the cavity wall of the second airflow cavity 124. When the air enters the second airflow cavity 124 from the air control hole 151, a part of the air enters the air flow channel 1612 as secondary air for combustion, and the other part of the air enters the cooling hole 1613 on the combustion body 161. Since the cooling hole 1613 is arranged close to the cavity wall of the second airflow cavity 124, the air flowing in the cooling hole 1613 will perform convection heat exchange on the cavity wall of the second airflow cavity 124, absorb part of the heat, reduce the temperature on the guide cover 120, avoid damage to the internal components of the gas water heater due to high temperature, and thus help to improve the working life of the gas water heater. In addition, when the combustion device 100 is installed on the heat exchange body 200, the air in the cooling hole 1613 can also cool the inner wall of the heat exchange body 200.

[0059] Specifically, please refer to Figure 4 There are multiple cooling holes 1613, and the multiple cooling holes 1613 are arranged at intervals along the edge of the combustion body 161.

[0060] In one embodiment, please refer to Figure 5 One end of the guide cover 120 is pressed onto the edge of the combustion body 161. A first sealing member 125 is provided between the guide cover 120 and the combustion body 161, which is conducive to improving the air tightness between the guide cover 120 and the combustion body 161 and preventing gas from leaking from between the guide cover 120 and the combustion body 161. The first sealing member 125 is a sealing rubber strip.

[0061] Optionally, the installation method between the deflector 120 and the combustion body 161 can be bolt connection, clamping, pin connection, riveting, etc.

[0062] For further information, please refer to Figure 5 The air guide cover 120 is provided with an installation groove 126 . The installation groove 126 is extended along the circumference of the air guide cover 120 , and the first sealing member 125 is disposed in the installation groove 126 .

[0063] In one embodiment, please refer to Figure 5 and Figure 6 , a boss 127 is provided in the air deflector 120 . The boss 127 is extended along the circumference of the air deflector 120 , and the wind control plate 150 is mounted on the boss 127 . In this way, the boss 127 structure is provided in the air deflector 120 to ensure that the wind control plate 150 is stably installed in the air deflector 120 .

[0064] Optionally, the wind control plate 150 is mounted on the boss 127 by bolt connection, pin connection, riveting, etc.

[0065] In one embodiment, please refer to Figure 4 , there are at least two gas flow channels 1611. At least two gas flow channels 1611 are spaced apart in the radial direction of the combustion body 161, and in any two adjacent gas flow channels 1611, one gas flow channel 1611 is arranged around the periphery of the other gas flow channel 1611. At least one ejector pipe 162 is connected to the gas flow channel 1611. The air flow channel 1612 is arranged between two adjacent gas flow channels 1611. It can be seen that the gas flow channels 1611 of this embodiment are distributed in an annular shape, and are arranged layer by layer from the inside to the outside on the gas body, which is conducive to the mixed gas flowing out from the gas flow channels 1611 of different layers, so as to achieve the combustion requirements of different load conditions.

[0066] In one embodiment, please refer to Figure 4 The combustion assembly 160 also includes an ignition assembly 163, which is installed on the combustion body 161. In this way, the ignition assembly 163 ensures that the gas is effectively ignited on the combustion body 161.

[0067] In one embodiment, please refer to Figure 1 and Figure 2 A gas water heater includes a heat exchange body 200 and a combustion device 100 in any one of the above embodiments. A combustion chamber 210 is provided in the heat exchange body 200. The heat exchange body 200 is installed below the combustion body 161, and the combustion chamber 210 is communicated with the second air flow chamber 124.

[0068] The above-mentioned gas water heater adopts the above-mentioned combustion device 100. During the combustion process, the air enters the first airflow chamber 123 under the action of the fan 110. The air entering the first airflow chamber 123 is divided into two parts, one part of the air flows into the second airflow chamber 124 from the air control hole 151; the other part continues to diffuse in the first airflow chamber 123. Among them, the air entering the second airflow chamber 124 will flow into the air flow channel 1612 to participate in the combustion on the combustion body 161 as secondary air, so that the gas is fully burned, the emission content in the flue gas is reduced, and the gas water heater is more environmentally friendly. In addition, for the air diffused in the first airflow chamber 123, when the air supply component 130 supplies air to the ejector pipe 162, the air in the first airflow chamber 123 is sucked into the ejector pipe 162 under the action of ejection and positive pressure to complete the mixing between part of the air and the gas. It can be seen that the combustion device 100 reasonably utilizes the air deflector 120 and the air control plate 150 to divide the air flow into two directions, completing both the secondary air supply and the premixing between the air and the gas, thereby effectively improving the air supply efficiency of the gas water heater. In addition, since the air deflector 120 and the air control plate 150 can simultaneously complete two air distribution processes, the structural arrangement on the combustion device 100 is effectively reduced, making the overall space arrangement reasonable, ensuring that the overall structure is more compact, and thus facilitating the miniaturization of the gas water heater. In particular, in order to improve the air tightness between the combustion body 161 and the heat exchange body 200, a third seal 164 can be provided between the combustion body 161 and the heat exchange body 200.

[0069] For further information, please refer to Figure 4 A guide portion 221 is provided on the cavity wall of the combustion chamber 210 close to the combustion body 161. The diameter D of the guide portion 221 decreases from the end of the guide portion 221 close to the combustion body 161 to the end of the guide portion 221 away from the combustion body 161. In this way, one end of the combustion chamber 210 is closed, ensuring that the smoke on the combustion body 161 is stably gathered in the combustion chamber 210.

[0070] Specifically, please refer to Figure 5 A cavity wall of the combustion cavity 210 is arched in a direction toward the inside of the combustion cavity 210 to form a guide portion 221 .

[0071] For further information, please refer to Figure 5 A water cavity 230 is also provided in the heat exchange body 200. The water cavity 230 is arranged around the periphery of the combustion cavity 210, and an interlayer 220 is provided between the water cavity 230 and the combustion cavity 210. In this way, the water cavity 230 is helpful to reduce the cavity wall temperature of the combustion cavity 210, thereby ensuring the stable operation of the gas water heater.

[0072] In one embodiment, please refer to Figure 2The gas water heater further includes a smoke exhaust pipe 300 , which is mounted on the heat exchange body 200 and communicated with the combustion chamber 210 , so that the smoke in the combustion chamber 210 can be effectively discharged.

[0073] 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.

[0074] 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 combustion device, characterized in that: The combustion device (100) comprises: A deflector (120), wherein a wind control plate (150) is provided in the deflector (120), wherein the wind control plate (150) divides the deflector (120) into a first airflow cavity (123) and a second airflow cavity (124), and the wind control plate (150) is provided with a wind control hole (151); A combustion assembly (160), the combustion assembly (160) comprising a combustion body (161) and an ejector pipe (162), the combustion body (161) being located in the second airflow cavity (124), the combustion body (161) being provided with an air flow channel (1612) and a gas flow channel (1611), the air flow channel (1612) being connected to the second airflow cavity (124), the ejector pipe (162) being installed on the combustion body (161) and being connected to the gas flow channel (1611), one end of the ejector pipe (162) penetrating the air control plate (150) and extending into the first airflow cavity (123); A fan (110) and an air supply assembly (130), wherein the fan (110) and the air supply assembly (130) are both mounted on the air guide cover (120), the air outlet end of the fan (110) and the air supply end of the air supply assembly (130) are both connected to the first air flow cavity (123), and the air supply assembly (130) is used to connect to an external air source.

2. The combustion device according to claim 1, characterized in that: The first airflow cavity (123) comprises a first split cavity (1231) and a second split cavity (1232) which are interconnected; the first split cavity (1231) is distributed away from the wind control plate (150) relative to the second split cavity (1232); and a cross-sectional area S1 of the first split cavity (1231) is smaller than a cross-sectional area S2 of the second split cavity (1232); an air outlet end of the fan (110) is connected to the second split cavity (1232); an air supply end of the air supply assembly (130) is connected to the first split cavity (1231); and one end of the ejector tube (162) extends into the first split cavity (1231).

3. The combustion device according to claim 2, characterized in that: The air deflector (120) comprises a first shell (121) and a second shell (122); the first shell (121) is connected to the second shell (122); the air control plate (150) is arranged in the second shell (122) and divides the second shell (122) into the second airflow chamber (124) and the second split chamber (1232); the first split chamber (1231) is arranged in the first shell (121); the fan (110) is installed on the second shell (122); and the air supply assembly (130) is installed on the first shell (121).

4. The combustion device according to claim 3, characterized in that: The combustion device (100) further comprises a first regulating valve (140), the air supply assembly (130) being used to communicate with an external air source via the first regulating valve (140), and the first regulating valve (140) and the fan (110) being both mounted on the second shell (122) and respectively located on opposite sides of the first shell (121).

5. The combustion device according to claim 4, characterized in that: The air supply assembly (130) comprises a second regulating valve (131), an air intake pipe (132) and a nozzle (134); the air intake pipe (132) is connected to the first regulating valve (140); the nozzle (134) is connected to the air intake pipe (132); the injection end of the nozzle (134) is located in the first split cavity (1231) and is arranged toward the pipe mouth of the ejector pipe (162); the second regulating valve (131) is used to adjust the air flow on the nozzle (134).

6. The combustion device according to claim 1, characterized in that: The combustion body (161) is provided with a cooling hole (1613), the cooling hole (1613) is in communication with the second airflow cavity (124), and the cooling hole (1613) is arranged close to the cavity wall of the second airflow cavity (124).

7. The combustion device according to any one of claims 1 to 6, characterized in that: One end of the deflector cover (120) is pressed onto the edge of the combustion body (161), and a first sealing member (125) is provided between the deflector cover (120) and the combustion body (161).

8. The combustion device according to any one of claims 1 to 6, characterized in that: There are at least two gas flow channels (1611), at least two gas flow channels (1611) are spaced apart in the radial direction of the combustion body (161), and in any two adjacent gas flow channels (1611), one of the gas flow channels (1611) is arranged around the periphery of the other gas flow channel (1611), the gas flow channel (1611) is connected to at least one ejector pipe (162), and the air flow channel (1612) is arranged between the two adjacent gas flow channels (1611); and / or, The combustion assembly (160) further comprises an ignition assembly (163), and the ignition assembly (163) is mounted on the combustion body (161).

9. A gas water heater, characterized in that: It comprises a heat exchange body (200) and a combustion device (100) as described in any one of claims 1 to 8, wherein a combustion chamber (210) is provided in the heat exchange body (200), the heat exchange body (200) is installed below the combustion body (161), and the combustion chamber (210) is communicated with the second airflow chamber (124).

10. The gas water heater according to claim 9, characterized in that: A flow guide portion (221) is provided on the cavity wall of the combustion cavity (210) close to the combustion body (161), and a diameter D of the flow guide portion (221) tends to decrease from an end of the flow guide portion (221) close to the combustion body (161) to an end of the flow guide portion (221) far from the combustion body (161).

Images