Oxygen enrichment mechanism and gas water heater

Abstract

This invention relates to an oxygen-enriching mechanism and a gas water heater. The oxygen-enriching mechanism includes a gas mixing component and an oxygen-enriching assembly. The gas mixing component has a combustion-supporting gas duct and at least two mixed gas ducts, each of which is connected to the combustion-supporting gas duct. Each mixed gas duct also has a gas inlet for inputting gas and a mixed gas outlet for outputting the mixed gas. The oxygen-enriching assembly is located at the inlet of the combustion-supporting gas duct to increase the oxygen content of the combustion-supporting gas flowing into the mixed gas duct from the combustion-supporting gas duct. By directly placing the oxygen-enriching assembly at the inlet of the combustion-supporting gas duct, combustion-supporting gas with a high oxygen content can flow into each mixed gas duct connected to the combustion-supporting gas duct, improving combustion efficiency while simplifying the overall structure.

Description

Technical Field

[0001] The invention relates to the technical field of household electrical appliances, in particular to an oxygen enrichment mechanism and a gas water heater. Background Art

[0002] Gas water heaters use the combustion process of combustible gas to provide heat, and the heat provided by the combustion is used to heat water for users. The combustion process of combustible gas in gas water heaters requires the presence of a combustion-supporting gas, and air is generally used as the combustion-supporting gas. In order to improve the combustion efficiency, oxygen-enriched components are generally used to increase the oxygen content in the combustion-supporting gas mixed with the combustible gas, so that the combustible gas can be fully burned. In general, there are multiple fire grates in gas water heaters, and the nozzles that provide combustible gas in the gas distribution rods correspond to the fire grates one by one. At the same time, the combustion-supporting gas is mixed with the combustible gas and then enters the fire grates for combustion to provide heat. In order to improve the overall combustion efficiency, oxygen-enriched components need to be set between each fire grate and the nozzle to increase the oxygen content in the combustion-supporting gas, and the structure is complicated. Summary of the invention

[0003] Based on this, it is necessary to provide an oxygen enrichment mechanism and a gas water heater to simplify the structure.

[0004] An oxygen enrichment mechanism comprises a gas mixing piece and an oxygen enrichment component, wherein the gas mixing piece is provided with a combustion-supporting gas duct and at least two mixed gas ducts, each of the mixed gas ducts is connected to the combustion-supporting gas duct, and the mixed gas duct is also provided with a gas inlet for inputting gas and a mixed gas outlet for outputting mixed gas, and the oxygen enrichment component is arranged at the inlet of the combustion-supporting gas duct to increase the oxygen content of the combustion-supporting gas flowing from the combustion-supporting gas duct into the mixed gas duct.

[0005] The above scheme provides an oxygen enrichment mechanism, which directly sets the oxygen enrichment component at the entrance of the combustion-supporting gas duct, so that each mixed gas duct connected to the combustion-supporting gas duct can flow into the combustion-supporting gas with a high oxygen content, thereby improving the combustion efficiency and simplifying the overall structure. Specifically, during use, air flows into each mixed gas duct through the combustion-supporting gas duct, and the air forms a combustion-supporting gas with a high oxygen content after flowing through the oxygen enrichment component, and the combustion-supporting gas flows into the mixed gas duct along the combustion-supporting gas duct. The combustion-supporting gas and the gas entering from the gas inlet are mixed in the mixed gas duct and then discharged from the mixed gas outlet into the burner for combustion.

[0006] In one embodiment, the oxygen-enriching component includes an oxygen-enriching membrane, and the oxygen-enriching membrane shields the combustion-supporting gas air duct inlet.

[0007] In one embodiment, the oxygen-enriched component also includes an oxygen-enriched membrane support and a fan. The oxygen-enriched membrane support is arranged at the entrance of the combustion-supporting gas duct, the oxygen-enriched membrane is arranged on the oxygen-enriched membrane support, and the fan is connected to the oxygen-enriched membrane support to provide power for the gas circulation in the combustion-supporting gas duct.

[0008] In one embodiment, the oxygen-enriched membrane support includes an annular outer frame and cross ribs arranged in the annular outer frame, the annular outer frame is arranged at the entrance of the combustion-supporting gas duct, and a plurality of limiting protrusions are provided on the annular outer frame, and the plurality of limiting protrusions are distributed at circumferential intervals on the annular outer frame, and the plurality of limiting protrusions are all located on the outside of the cross ribs, the oxygen-enriched membrane is limited between the limiting protrusions and the cross ribs, the fan is located on the inner side of the oxygen-enriched membrane support, and the main shaft of the fan is connected to the cross ribs.

[0009] In one embodiment, the gas mixing element includes a main air duct and at least two branch pipes, the internal channel of the main air duct is the combustion-supporting gas air duct, the oxygen-enriching component is arranged at the inlet of the main air duct, the number of the branch pipes is consistent with the number of the mixed gas air ducts, the internal channel of the branch pipes is the mixed gas air duct, the openings at both ends of the branch pipes are the gas inlet and the mixed gas outlet, respectively, the side walls of the branch pipes are provided with combustion-supporting gas inlets, and the combustion-supporting gas inlets of each of the branch pipes are connected to the main air duct.

[0010] In one embodiment, the side wall of the main air duct is provided with at least two outlets, which are distributed at intervals in the axial direction of the main air duct, the side wall of the branch pipe is connected to the side wall of the main air duct, and the outlets are connected to the combustion-supporting gas inlet in a one-to-one correspondence.

[0011] A gas water heater comprises the above-mentioned oxygen enrichment mechanism.

[0012] The gas water heater provided by the above scheme adopts the oxygen enrichment mechanism described in any of the above embodiments, thereby improving the combustion efficiency and simplifying the overall structure.

[0013] In one of the embodiments, it also includes a burner and an air intake auxiliary component, in which an air intake auxiliary channel is provided, and the outlet of the air intake auxiliary channel is correspondingly connected with the inlet of the combustion-supporting gas air duct. The air intake auxiliary component is located on the side of the burner facing the gas water heater panel, and the mixed gas outlet is correspondingly connected with the air inlet of the burner.

[0014] In one embodiment, the air intake auxiliary component includes a top plate, a bottom plate and multiple side plates, the top plate and the bottom plate are spaced apart, and the multiple side plates are connected to the side edges of the top plate and the bottom plate, the top plate, the bottom plate and the multiple side plates form the air intake auxiliary channel, the bottom plate is arranged close to the burner relative to the top plate, the outlet of the air intake auxiliary channel is a through hole arranged on the bottom plate, the through hole arranged on the bottom plate is correspondingly connected to the inlet of the combustion-supporting gas air duct, and the inlet of the air intake auxiliary channel is located at one end of the air intake auxiliary component away from the outlet of the air intake auxiliary channel.

[0015] In one of the embodiments, the distance between the top plate and the bottom plate is greater than the width of the top plate or the bottom plate, so that the cross-section of the auxiliary air inlet channel is rectangular.

[0016] In one of the embodiments, it further comprises a gas distribution rod, wherein the gas distribution rod is provided with at least two nozzles, and the nozzles are connected to the gas inlets in a one-to-one correspondence. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of the gas water heater described in this embodiment;

[0020] Figure 2 for Figure 1 An exploded view of the gas water heater shown;

[0021] Figure 3 is an exploded view of the oxygen-enriched component described in this embodiment;

[0022] Figure 4 is a schematic diagram of the structure of the gas mixing element described in this embodiment;

[0023] Figure 5 for Figure 4 A schematic diagram of the structure of the gas mixing element shown in another viewing angle;

[0024] Figure 6 is a structural schematic diagram of the air inlet auxiliary component described in this embodiment;

[0025] Figure 7 Schematic diagram of the structure of the gas distribution rod described in this embodiment.

[0026] Description of reference numerals:

[0027] 10. Gas water heater; 11. Burner; 111. Air inlet; 12. Heat exchanger; 121. Heat exchange tube; 13. Fan assembly; 14. Shell; 15. Air inlet auxiliary part; 151. Air inlet auxiliary channel; 152. Bottom plate; 1521. Through hole; 153. Side plate; 16. Gas distribution rod; 161. Nozzle; 17. Oxygen enrichment mechanism; 171. Main air duct; 1711. Combustion-supporting gas air duct; 172. Branch pipe; 1721. Gas inlet; 1722. Mixed gas outlet; 173. Oxygen enrichment assembly; 1731. Oxygen enrichment membrane; 1732. Oxygen enrichment membrane bracket; 1733. Annular outer frame; 1734. Cross ribs; 1735. Limiting protrusion; 1736. Fan; 18. Gas proportional valve; 19. Auxiliary lug. DETAILED DESCRIPTION

[0028] 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.

[0029] like Figure 1 and Figure 2 As shown, in one embodiment, a gas water heater 10 is provided, which uses the heat generated by the combustion of gas to heat water, and the obtained hot water is provided for users. Generally, a burner 11 is provided in the gas water heater 10, and the mixed gas formed by the mixture of the gas and the combustion-supporting gas is transported to the burner 11, and the mixed gas burns to generate flames after ignition. The flame can directly act on the pipeline where water flows to heat the water in the pipeline. Or as Figure 1 and Figure 2 As shown, a heat exchanger 12 and a fan assembly 13 are further provided in the gas water heater 10. A smoke cavity is formed in the heat exchanger 12. The heat exchanger 12 includes a heat exchange tube 121 wound outside. The fan assembly 13 is installed on the heat exchanger 12 to discharge the smoke in the smoke cavity. During the discharge process, the smoke exchanges heat with the water in the heat exchange tube 121, so that the water in the heat exchange tube 121 is heated to form hot water for users.

[0030] The mixing process of the above fuel gas and combustion-supporting gas is carried out in the oxygen enrichment mechanism 17. Specifically, in one embodiment, Figure 2 and Figure 3As shown, the oxygen enrichment mechanism 17 includes a gas mixing element and an oxygen enrichment component 173. The gas mixing element is provided with a combustion-supporting gas duct 1711 and at least two mixed gas ducts. Specifically, the gas mixing element can be as follows Figure 4 and Figure 5 As shown, it includes a main air duct 171 and at least two branch pipes 172, the internal channel of the main air duct 171 is the combustion-supporting gas air duct 1711, and the internal channel of the branch pipe 172 is the mixed gas air duct. Alternatively, the gas mixing element is a complete block structure, and the combustion-supporting gas air duct 1711 and the mixed gas air duct are channels set in the block structure.

[0031] Furthermore, each of the mixed gas air ducts is connected to the combustion-supporting gas air duct 1711, and the combustion-supporting gas air duct 1711 can be connected to the outside air to transmit the air to the mixed gas air duct. Figure 4 and Figure 5 As shown, the mixed gas air duct is also provided with a gas inlet 1721 for inputting gas and a mixed gas outlet 1722 for outputting mixed gas. The oxygen enrichment component 173 is arranged at the inlet of the combustion-supporting gas air duct 1711, and is used to increase the oxygen content of the combustion-supporting gas flowing from the combustion-supporting gas air duct 1711 into the mixed gas air duct.

[0032] During the combustion process, air flows into each mixed gas duct through the combustion-supporting gas duct 1711, and after the air flows through the oxygen-enriching component 173, it forms a combustion-supporting gas with a high oxygen content, and the combustion-supporting gas flows into the mixed gas duct along the combustion-supporting gas duct 1711. The combustion-supporting gas and the gas entering from the gas inlet 1721 are mixed in the mixed gas duct and then discharged from the mixed gas outlet 1722 into the burner 11 for combustion. The gas of the gas inlet 1721 is mainly provided by the gas distribution rod 16, as shown in FIG. Figure 2 and Figure 6 As shown, the gas distribution rod 16 is provided with a nozzle 161 , and the nozzle 161 is correspondingly communicated with the gas inlet 1721 , and the gas enters the gas inlet 1721 through the nozzle 161 .

[0033] The above scheme provides an oxygen enrichment mechanism 17, which directly sets the oxygen enrichment component 173 at the entrance of the combustion-supporting gas duct 1711, so that the combustion-supporting gas with a higher oxygen content can flow into each mixed gas duct connected to the combustion-supporting gas duct 1711, without having to set an oxygen enrichment component in each mixed gas duct to increase the oxygen content, thereby simplifying the overall structure while improving the combustion efficiency.

[0034] Specifically, in one embodiment, Figure 2 and Figure 3As shown, the oxygen-enriching component 173 includes an oxygen-enriching membrane 1731, and the oxygen-enriching membrane 1731 blocks the entrance of the combustion-supporting gas air duct 1711. When air passes through the oxygen-enriching membrane 1731 and enters the combustion-supporting gas channel, oxygen preferentially passes through the oxygen-enriching membrane 1731 under the pressure difference, so that the gas passing through the oxygen-enriching membrane 1731 and entering the combustion-supporting gas channel is a combustion-supporting gas with a higher oxygen content.

[0035] Further, in one embodiment, if Figure 2 and Figure 3 As shown, the oxygen-enriching assembly 173 further includes an oxygen-enriching membrane support 1732 and a fan 1736. The oxygen-enriching membrane support 1732 is arranged at the entrance of the combustion-supporting gas duct 1711, the oxygen-enriching membrane 1731 is arranged on the oxygen-enriching membrane support 1732, and the fan 1736 is connected to the oxygen-enriching membrane support 1732 to provide power for the gas circulation in the combustion-supporting gas duct 1711.

[0036] During use, when the gas distribution rod 16 provides gas to the gas inlet 1721, the negative pressure formed in the combustion-supporting gas duct 1711 allows air to pass through the oxygen-enriched membrane 1731 from outside the combustion-supporting gas duct 1711 and enter the combustion-supporting gas duct 1711. At the same time, the setting of the fan 1736 further provides power for the entry of air, so that the air can pass through the oxygen-enriched membrane 1731 more quickly. Specifically, the start and stop and the speed of the fan 1736 can be uniformly controlled by the control unit of the gas water heater 10. The amount of oxygen entering the combustion-supporting gas duct 1711 is controlled by adjusting the speed of the fan 1736.

[0037] More specifically, in one embodiment, Figure 3 As shown, the oxygen-enriched membrane support 1732 includes an annular outer frame 1733 and a cross rib 1734 arranged in the annular outer frame 1733, and each end of the cross rib 1734 is connected to the annular outer frame 1733. The annular outer frame 1733 is arranged at the entrance of the combustion-supporting gas duct 1711. The annular outer frame 1733 is provided with a plurality of limiting protrusions 1735, and the plurality of limiting protrusions 1735 are distributed at intervals in the circumferential direction of the annular outer frame 1733. The plurality of limiting protrusions 1735 are all located on the outer side of the cross rib 1734, and the oxygen-enriched membrane 1731 is limited between the limiting protrusions 1735 and the cross rib 1734. The fan 1736 is located on the inner side of the oxygen-enriched membrane support 1732, and the main shaft of the fan 1736 is connected to the cross rib 1734.

[0038] Here, the inner side of the oxygen-enriched membrane support 1732 refers to the side of the oxygen-enriched membrane support 1732 facing the inside of the combustion-supporting gas duct 1711 when the oxygen-enriched membrane support 1732 is installed at the entrance of the combustion-supporting gas duct 1711. The outer side of the cross rib 1734 refers to the side of the cross rib 1734 facing the outside of the combustion-supporting gas duct 1711 when the oxygen-enriched membrane support 1732 is installed at the entrance of the combustion-supporting gas duct 1711.

[0039] During the installation process, the fan 1736 is installed on the oxygen-enriched membrane bracket 1732, and the oxygen-enriched membrane 1731 is pressed between the limiting protrusion 1735 and the cross rib 1734 by utilizing the elastic deformation ability of the oxygen-enriched membrane 1731. Then, the assembled oxygen-enriched component 173 is installed at the entrance of the combustion-supporting gas duct 1711.

[0040] More specifically, if Figure 4 and Figure 5 As shown, in one embodiment, when the gas mixing element includes a main air duct 171 and at least two branch pipes 172. The oxygen enrichment component 173 is arranged at the inlet of the main air duct 171. The number of the branch pipes 172 is consistent with the number of the mixed gas air ducts, and the openings at both ends of the branch pipes 172 are the gas inlet 1721 and the mixed gas outlet 1722. When assembling, Figure 2 As shown, the gas inlet 1721 of the branch pipe 172 is assembled correspondingly with the nozzle 161 of the gas distribution rod 16, so that the gas inlet 1721 is connected to the nozzle 161 of the gas distribution rod 16; the mixed gas outlet 1722 of the branch pipe 172 is assembled correspondingly with the air inlet 111 of the burner 11, so that the mixed gas outlet 1722 is connected to the gas inlet 1721. In other words, the branch pipe 172 is connected between the gas distribution rod 16 and the burner 11.

[0041] The side wall of the branch pipe 172 is provided with a combustion-supporting gas inlet, and the combustion-supporting gas inlet of each branch pipe 172 is connected to the main air duct 171. The combustion-supporting gas in the combustion-supporting gas air duct 1711 enters each branch pipe 172 through the combustion-supporting gas inlet, and the fuel gas enters the branch pipe 172 through the fuel gas inlet 1721. The mixed gas mixed in the branch pipe 172 enters the burner 11 through the mixed gas outlet 1722 and the air inlet 111 of the burner 11 for combustion.

[0042] When the oxygen enrichment component 173 includes the oxygen enrichment membrane support 1732, the oxygen enrichment membrane support 1732 is disposed at the inlet of the main air duct 171. Figures 3 to 5As shown, auxiliary lugs 19 can be provided at the inlet of the main air duct 171 and on the annular outer frame 1733 of the oxygen-enriched membrane support 1732, and the oxygen-enriched membrane support 1732 can be fixed at the inlet of the main air duct 171 by passing through the auxiliary lugs 19 on the main air duct 171 and the auxiliary lugs 19 on the annular outer frame 1733 using connecting parts such as screws.

[0043] Further, in one embodiment, if Figure 4 and Figure 5 As shown, the side wall of the main air duct 171 is provided with at least two outlets, which are spaced apart in the axial direction of the main air duct 171. The side wall of the branch pipe 172 is connected to the side wall of the main air duct 171, and the outlets are connected to the combustion-supporting gas inlet in a one-to-one correspondence. Figure 4 and Figure 5 As shown, they are arranged side by side along the axial direction of the main air duct 171.

[0044] Further optionally, the oxygen enrichment mechanism 17 may also be applied to other gas water heaters 10 .

[0045] In another embodiment, Figure 1 and Figure 2 As shown, the gas water heater 10 includes an air inlet auxiliary component 15. Figure 6 As shown, the air inlet auxiliary member 15 is provided with an air inlet auxiliary channel 151, and the outlet of the air inlet auxiliary channel 151 is correspondingly connected with the inlet of the combustion-supporting gas duct 1711. When the gas water heater 10 is burning, under the action of the suction force in the combustion-supporting gas duct 1711, the outside air flows through the air inlet auxiliary channel 151 and enters the combustion-supporting gas duct 1711. The air inlet auxiliary member 15 is located on the side of the burner 11 facing the panel of the gas water heater 10. When the air flows through the air inlet auxiliary channel 151, the heat loss of the air inlet auxiliary member 15 is accelerated, so that the temperature of the air inlet auxiliary member 15 is kept at a low level, effectively avoiding the high temperature of the burner 11 from having an adverse effect on the panel of the gas water heater 10.

[0046] The gas entering the combustion-supporting gas duct 1711 is a combustion-supporting gas with a high oxygen content. After the combustion-supporting gas enters the mixed gas duct of the gas mixer and is mixed, the mixed gas outlet 1722 is connected to the air inlet 111 of the burner 11 in a one-to-one correspondence, and the mixed gas enters the burner 11 for combustion.

[0047] Specifically, Figure 6As shown, in one embodiment, the air inlet auxiliary member 15 includes a top plate, a bottom plate 152 and a plurality of side plates 153. The top plate and the bottom plate 152 are spaced apart, and the plurality of side plates 153 are connected to the sides of the top plate and the bottom plate 152. The top plate, the bottom plate 152 and the plurality of side plates 153 enclose the air inlet auxiliary channel 151. The bottom plate 152 is arranged close to the burner 11 relative to the top plate, and the outlet of the air inlet auxiliary channel 151 is a through hole 1521 arranged on the bottom plate 152. Figure 1 and Figure 2 As shown, after assembly, the through hole 1521 provided on the bottom plate 152 is connected to the inlet of the combustion-supporting gas duct 1711. The inlet of the auxiliary air inlet channel 151 is located at one end of the auxiliary air inlet member 15 away from the outlet of the auxiliary air inlet channel 151.

[0048] When the gas mixing element includes the main air duct 171 and the branch pipe 172, the through hole 1521 on the bottom plate 152 is arranged corresponding to the inlet of the main air duct 171. The end of the main air duct 171 can be inserted into the through hole 1521 of the bottom plate 152, so that the oxygen enrichment component 173 arranged at the inlet of the main air duct 171 is located in the air inlet auxiliary channel 151. Or the oxygen enrichment component 173 is aligned and connected between the inlet of the main air duct 171 and the through hole 1521 of the bottom plate 152.

[0049] Furthermore, if Figure 6 As shown, in one embodiment, the distance between the top plate and the bottom plate 152 is greater than the width of the top plate or the bottom plate 152, so that the cross section of the air intake auxiliary channel 151 is rectangular. Figure 6 The flat structure and the air inlet auxiliary component 15 can fully block the burner 11 and the panel to protect the panel. At the same time, the thin thickness of the air inlet component 15 allows the overall thickness of the gas water heater 10 to remain at a low level.

[0050] Furthermore, if Figure 7 As shown, in one embodiment, the gas water heater 10 includes a gas distribution rod 16 with at least two nozzles 161 , and the nozzles 161 are connected to the gas inlet 1721 in a one-to-one correspondence.

[0051] The air inlet 111 of the burner 11, the branch pipe 172, and the nozzle 161 are connected one by one. One fire bar in the burner 11 corresponds to one air inlet 111 of the burner 11. The on-off of the gas in each branch pipe 172 directly affects whether the corresponding fire bar burns.

[0052] Furthermore, if Figure 1 and Figure 2 As shown, the gas water heater 10 is further provided with a gas proportional valve 18 for controlling the amount of gas introduced by the gas distribution rod 16 .

[0053] Furthermore, if Figure 1 and Figure 2 As shown, the gas water heater 10 further includes a shell 14 , and the above components in the gas water heater 10 can be arranged in the shell 14 .

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 do not represent the only implementation method.

[0059] 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.

[0060] 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. An oxygen enrichment mechanism, characterized in that: It comprises a gas mixing element and an oxygen enrichment component, wherein the gas mixing element is provided with a combustion-supporting gas duct and at least two mixed gas ducts, each of the mixed gas ducts is communicated with the combustion-supporting gas duct, the mixed gas duct is further provided with a gas inlet for inputting gas and a mixed gas outlet for outputting mixed gas, and the oxygen enrichment component is arranged at the inlet of the combustion-supporting gas duct, and is used to increase the oxygen content of the combustion-supporting gas flowing from the combustion-supporting gas duct into the mixed gas duct; The gas mixing element includes a main air duct and at least two branch pipes, the internal channel of the main air duct is the combustion-supporting gas air duct, the oxygen-enriching component is arranged at the inlet of the main air duct, the number of the branch pipes is consistent with the number of the mixed gas air duct, the internal channel of the branch pipe is the mixed gas air duct, the openings at both ends of the branch pipe are the gas inlet and the mixed gas outlet, respectively, the side wall of the branch pipe is provided with a combustion-supporting gas inlet, and the combustion-supporting gas inlet of each branch pipe is connected to the main air duct; the side wall of the main air duct is provided with at least two outlets, the outlets are distributed at axial intervals of the main air duct, the side wall of the branch pipe is connected to the side wall of the main air duct, and the outlets are connected to the combustion-supporting gas inlets one by one.

2. The oxygen enrichment mechanism according to claim 1, characterized in that: The oxygen-enriching component comprises an oxygen-enriching membrane, and the oxygen-enriching membrane shields the inlet of the combustion-supporting gas air duct.

3. The oxygen enrichment mechanism according to claim 2, characterized in that: The oxygen-enriched component also includes an oxygen-enriched membrane support and a fan. The oxygen-enriched membrane support is arranged at the entrance of the combustion-supporting gas duct, the oxygen-enriched membrane is arranged on the oxygen-enriched membrane support, and the fan is connected to the oxygen-enriched membrane support to provide power for gas circulation in the combustion-supporting gas duct.

4. The oxygen enrichment mechanism according to claim 3, characterized in that: The oxygen-enriched membrane support includes an annular outer frame and cross ribs arranged in the annular outer frame, the annular outer frame is arranged at the entrance of the combustion-supporting gas duct, a plurality of limiting protrusions are provided on the annular outer frame, the plurality of limiting protrusions are distributed at intervals in the circumferential direction of the annular outer frame, the plurality of limiting protrusions are all located on the outside of the cross ribs, the oxygen-enriched membrane is limited between the limiting protrusions and the cross ribs, the fan is located on the inner side of the oxygen-enriched membrane support, and the main shaft of the fan is connected to the cross ribs.

5. A gas water heater, characterized in that: The oxygen enrichment device comprises the oxygen enrichment device according to any one of claims 1 to 4.

6. The gas water heater according to claim 5, characterized in that: It also includes a burner and an air inlet auxiliary component, in which an air inlet auxiliary channel is provided, and the outlet of the air inlet auxiliary channel is correspondingly connected with the inlet of the combustion-supporting gas air duct. The air inlet auxiliary component is located on the side of the burner facing the gas water heater panel, and the mixed gas outlet is correspondingly connected with the air inlet of the burner.

7. The gas water heater according to claim 6, characterized in that: The air intake auxiliary component includes a top plate, a bottom plate and multiple side plates, the top plate and the bottom plate are spaced apart, the multiple side plates are connected to the side edges of the top plate and the bottom plate, the top plate, the bottom plate and the multiple side plates form the air intake auxiliary channel, the bottom plate is arranged close to the burner relative to the top plate, the outlet of the air intake auxiliary channel is a through hole arranged on the bottom plate, the through hole arranged on the bottom plate is correspondingly connected to the inlet of the combustion-supporting gas air duct, and the inlet of the air intake auxiliary channel is located at one end of the air intake auxiliary component away from the outlet of the air intake auxiliary channel.

8. The gas water heater according to claim 7, characterized in that: The distance between the top plate and the bottom plate is greater than the width of the top plate or the bottom plate, so that the cross section of the auxiliary air intake channel is rectangular.

9. The gas water heater according to any one of claims 5 to 8, characterized in that: It also includes a gas distribution rod, which is provided with at least two nozzles, and the nozzles are connected to the gas inlets in a one-to-one correspondence.

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