Gas water heater

Abstract

The utility model relates to a kind of gas water heater, it includes shell, combustor, heat exchanger and cooling pipe group, and the installation inner cavity that is formed with up-down through in shell;Combustor is used to burn combustible gas;Heat exchanger includes sensible heat exchange component and latent heat exchange component;Among them, combustor, sensible heat exchange component and latent heat exchange component are arranged in installation inner cavity along the direction from top to bottom, and cooling pipe group, sensible heat exchange component and latent heat exchange component are sequentially connected.Sensible heat exchange component and latent heat exchange component are arranged in the same installation inner cavity, and there is no sealing requirement between sensible heat exchange component and latent heat exchange component, which is conducive to improving installation efficiency, and the integrated structure can reduce flue gas leakage, improve safety, and is conducive to the miniaturization improvement of whole gas water heater, cooling pipe group is arranged on the side wall of shell, which is conducive to reducing the temperature of shell, reducing the influence of high temperature generated by combustor on the outer wall of shell.

Description

Technical Field

[0001] This utility model belongs to the field of electrical equipment technology, and in particular relates to a gas water heater. Background Technology

[0002] Currently, gas water heaters are common household appliances in people's daily lives. Gas water heaters typically include an outer casing, as well as components such as a burner and a heat exchanger installed inside the casing. The inlet and outlet water pipes arranged on the outer casing are connected to the heat exchanger. Cold water entering from the inlet water pipe is heated by the heat exchanger and then hot water can be output from the outlet water pipe.

[0003] Existing gas water heaters consist of two parts: a sensible heat exchanger and a latent heat exchanger. These two heat exchangers are detachably connected. The flue gas generated by the burner combustion passes sequentially through both heat exchangers, exchanging heat with the water flow within them. Connecting the sensible and latent heat exchangers is complex, requires high sealing at the connection points, poses a risk of flue gas leakage and safety hazards, and also results in a large overall size of the heat exchanger. Furthermore, some heat from the burner combustion process is transferred to the outer casing, causing it to overheat. This excess heat cannot participate in heat exchange, leading to heat waste. Utility Model Content

[0004] The purpose of this utility model is to provide a gas water heater that solves the problems existing in the prior art, such as the detachable connection between the sensible heat exchanger and the latent heat exchanger in the existing gas water heater, the high sealing requirements at the connection point, the risk of flue gas leakage, the excessively high shell temperature due to the influence of the burner, and the waste of heat.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] This utility model discloses a gas water heater, which includes:

[0007] The outer casing has a through-hole mounting cavity inside.

[0008] A burner is used to burn combustible gases;

[0009] A heat exchanger, which includes sensible heat exchange components and latent heat exchange components;

[0010] A cooling pipe assembly is disposed on the inner wall of the mounting cavity, and the cooling pipe assembly is located on at least one side of the burner;

[0011] The burner, the sensible heat exchanger, and the latent heat exchanger are arranged in the mounting cavity from top to bottom, and the cooling pipe assembly, the sensible heat exchanger, and the latent heat exchanger are connected in sequence.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are:

[0013] The gas water heater involved in this application has a sensible heat exchange component and a latent heat exchange component for exchanging heat with the flue gas generated by the burner combustion, which are arranged in the same installation cavity. There is no need for sealing between the sensible heat exchange component and the latent heat exchange component, which is beneficial to improving installation efficiency. Moreover, this integrated structure can reduce flue gas leakage, improve safety, and facilitate the miniaturization of the entire gas water heater.

[0014] The cooling pipe assembly is located on the side wall of the casing, which helps to reduce the temperature of the casing and reduce the impact of the high temperature generated by the burner on the outer wall of the casing. In addition, the heat from the burner combustion can be further utilized to heat the fluid in the cooling pipe assembly, thereby improving the heat utilization rate.

[0015] In addition, the burner is located above the heat exchanger. The flue gas generated by the burner combustion flows downward, passes through the heat exchanger, and exchanges heat with the water flow inside the heat exchanger. The condensate formed outside the heat exchanger drips downward into the water collection pan located at the bottom of the installation cavity, which will not affect the burner.

[0016] In some embodiments of this application, the outer casing is provided with a water inlet and a water outlet. The water inlet is connected to one end of the latent heat exchange component, the other end of the latent heat exchange component is connected to one end of the sensible heat exchange component, the other end of the sensible heat exchange component is connected to one end of the cooling pipe assembly, and the other end of the cooling pipe assembly is connected to the water outlet.

[0017] The water flowing into the inlet passes through the latent heat exchange component, the sensible heat exchange component, and the cooling pipe assembly in sequence before being output from the outlet. The water undergoes three heat exchange processes, resulting in high heat utilization.

[0018] In some embodiments of this application, the housing includes a first side and a second side disposed opposite to each other, and at least one cooling water pipe is respectively disposed on the first side and the second side, and two cooling water pipes at the same height on the first side and the second side are connected by a transverse connecting portion.

[0019] The number and location of cooling water pipes can be designed specifically to meet the actual design and burner height requirements, thereby improving heat utilization.

[0020] In some embodiments of this application, the housing further includes a first end face and a second end face disposed opposite to each other, the transverse connecting portion being formed on the first end face; a longitudinal connecting portion connected to the heat exchanger and a confluence portion connected to the water outlet are formed on the second end face, a longitudinal connecting cavity for connecting each of the cooling water pipes on the first side is formed in the longitudinal connecting portion, and a confluence cavity for connecting each of the cooling water pipes on the second side is formed in the confluence portion.

[0021] In some embodiments of this application, the sensible heat exchange component includes a plurality of first heat exchange tubes connected in series and a plurality of heat exchange fins spaced apart along the axial direction of the first heat exchange tubes. The input end of the sensible heat exchange component is connected to the latent heat exchange component, and the output end of the sensible heat exchange component is connected to the longitudinal connecting portion.

[0022] The first heat exchange tubes are connected in series, which helps to make the fluid flow more uniform and reduce scale.

[0023] In some embodiments of this application, along the height direction of the outer shell, the sensible heat exchange assembly includes at least two layers of first heat exchange tubes, which are staggered between adjacent layers.

[0024] The staggered arrangement of the first heat exchange tubes in adjacent layers can increase the contact area with the flue gas and improve the heat exchange efficiency.

[0025] In some embodiments of this application, a turbulence-inducing part is provided inside the first heat exchange tube, which is used to increase the resistance of water flow inside the first heat exchange tube.

[0026] The turbulence section helps to increase the flow resistance of water in the first heat exchange tube, thereby improving the heat exchange effect.

[0027] In some embodiments of this application, at least two sets of latent heat exchange components are provided in the mounting cavity along the height direction of the outer shell. Adjacent latent heat exchange components are connected in series. Each latent heat exchange component includes multiple sets of second heat exchange units connected in parallel. Each set of second heat exchange units includes multiple second heat exchange tubes connected in series. The second heat exchange tubes in adjacent second heat exchange units are arranged alternately.

[0028] In some embodiments of this application, the water inlet is connected to the latent heat exchange component located at the lowest layer via a water inlet adapter, the sensible heat exchange component is connected to the latent heat exchange component located at the highest layer, and a baffle is formed between adjacent latent heat exchange components, with a flue gas outlet formed on the baffle for flue gas to pass through.

[0029] In some embodiments of this application, the second heat exchange tube is a corrugated tube, and a bend is provided between two second heat exchange tubes connected in series in the same second heat exchange unit. The position of the flue gas outlet corresponds to the position of the second heat exchange tube.

[0030] The position of the flue gas outlet corresponds to the second heat exchange tube to increase the contact between the flue gas and the second heat exchange tube, reduce the amount of flue gas passing through the bend in the tube, and improve the heat exchange efficiency.

[0031] In some embodiments of this application, the outer shell is made of stainless steel, and the two ends of the first side and the second side are fixed between the first end face and the second end face by welding or mechanical connection, respectively.

[0032] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is one of the structural diagrams of an embodiment of the gas water heater proposed in this utility model;

[0035] Figure 2 This is the second structural diagram of an embodiment of the gas water heater proposed in this utility model;

[0036] Figure 3 This is the third structural diagram of one embodiment of the gas water heater proposed in this utility model;

[0037] Figure 4 This is a structural diagram of the heat exchanger inside the outer casing;

[0038] Figure 5 This is a diagram of the heat exchange fin structure;

[0039] Figure 6 This is the second end view of the gas water heater;

[0040] Figure 7 yes Figure 6 AA section view in the middle;

[0041] Figure 8 This is a first end view of a gas water heater;

[0042] Figure 9 yes Figure 8 BB section view in the middle;

[0043] Figure 10 This is a schematic diagram of the second side of a gas water heater;

[0044] Figure 11 yes Figure 10 CC section view in the middle;

[0045] In the picture,

[0046] 100. Outer shell; 110. First side surface; 120. Second side surface;

[0047] 130. First end face; 131. Water inlet; 132. Lateral connecting part; 133. First transfer part; 134. Transition part; 135. External connecting pipe;

[0048] 140. Second end face; 141. Water outlet; 142. Convergence section; 143. Longitudinal connecting section; 144. Second flow section; 145. Limiting groove;

[0049] 150. Connecting bends;

[0050] 200. Cooling pipe assembly; 210. Cooling water pipe;

[0051] 300. Heat exchanger;

[0052] 310. Sensible heat exchange components;

[0053] 311. First heat exchange tube;

[0054] 312. Heat exchange fins; 3121. Mounting port; 3122. Flow guide molding; 3123. Flow guide flange;

[0055] 313. Aerodynamic spoiler;

[0056] 320, Latent heat exchanger assembly; 3201, Second heat exchanger tube; 3202, Bend section;

[0057] 321. First heat exchange unit; 322. Baffle; 3221. Smoke outlet; 323. Second heat exchange unit. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0059] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0063] refer to Figures 1-4 This application proposes a gas water heater, which includes a housing 100 and working components such as a burner and a heat exchanger 300 disposed within the housing 100.

[0064] Specifically, an installation cavity is formed inside the outer casing 100, running from top to bottom. A burner (not shown) and a heat exchanger 300 are disposed in the installation cavity. The burner is used to burn combustible gas, and the heat exchanger 300 is used for water to flow through and exchange heat with the flue gas generated by the burner.

[0065] The heat exchanger 300 includes a sensible heat exchange component 310 and a latent heat exchange component 320.

[0066] Inside the installation cavity, the burner, sensible heat exchanger 310, and latent heat exchanger 320 are arranged sequentially from top to bottom.

[0067] The sensible heat exchange component 310 and the latent heat exchange component 320, which are used for heat exchange with the flue gas generated by the burner, are arranged in the same installation cavity. There is no sealing requirement between the sensible heat exchange component 310 and the latent heat exchange component 320 in this application, which is beneficial to improving installation efficiency. Moreover, the integrated structure can reduce flue gas leakage, improve safety, and facilitate the miniaturization improvement of the entire gas water heater.

[0068] In addition, since the burner is located above the heat exchanger 300, the flue gas generated by the burner combustion flows downward, passes through the heat exchanger 300, and exchanges heat with the water flow inside the heat exchanger 300. The condensate formed outside the heat exchanger 300 drips downward into the water collection pan located at the bottom of the installation cavity, which will not affect the burner.

[0069] refer to Figure 1 , Figure 3 In some embodiments of this application, the outer casing 100 is provided with a water inlet 131 and a water outlet 141.

[0070] The water inlet 131 can be a water inlet port or water inlet pipe fixed on the outer casing 100, and the water outlet 141 can be a water outlet port or water outlet pipe fixed on the outer casing 100.

[0071] During the combustion process, the temperature around the burner is relatively high. In order to prevent the high temperature generated by the burner from being transferred to the outer casing 100, in addition to causing the outer casing 100 to become too hot and affecting its service life, it will also cause some heat to be wasted.

[0072] To solve the above problems, this application provides a cooling pipe assembly 200 on the inner wall of the mounting cavity. The cooling pipe assembly 200 is located on at least one side of the burner. One end of the cooling pipe assembly 200 is connected to the water outlet 141, and the other end is connected to the heat exchanger 300.

[0073] Specifically, the water inlet 131 is connected to the water outlet 141 in sequence through the latent heat exchange component 320, the sensible heat exchange component 310, and the cooling pipe assembly 200. After the water flows into the water inlet 131, it passes through the latent heat exchange component 320 and the sensible heat exchange component 310 in sequence to exchange heat with the flue gas. Then, it is transported to the cooling pipe assembly 200 to further exchange heat with the outer shell 100 before being output from the water outlet 141.

[0074] In other words, the water inlet 131 is connected to one end of the latent heat exchange component 320, the other end of the latent heat exchange component 320 is connected to one end of the sensible heat exchange component 310, the other end of the sensible heat exchange component 310 is connected to one end of the cooling pipe assembly 200, and the other end of the cooling water pipe 210 is connected to the water outlet 141.

[0075] In some embodiments of this application, the cooling pipe assembly 200 is fixed to the side wall of the mounting cavity by welding or mechanical connection. The installation position of the cooling pipe assembly 200 corresponds to the position of the burner in order to absorb the heat generated by the combustion of the burner to the greatest extent.

[0076] The cooling pipe assembly 200 can be installed separately on one side wall of the mounting cavity. On this side wall, the cooling pipe assembly 200 includes at least one cooling water pipe 210, one end of which is connected to the heat exchanger 300 and the other end is connected to the water outlet 141.

[0077] After the water flows through the heat exchanger 300 and exchanges heat with the flue gas, it flows through the cooling water pipe 210 and is further heated by the heat generated by the combustion of the burner in the cooling pipe assembly 200, making full use of thermal energy. In addition, the water flow in the cooling pipe assembly 200 can also cool the outer shell 100 to prevent the outer shell 100 from getting too hot.

[0078] In some other embodiments, the housing 100 includes a first side 110 and a second side 120 disposed opposite to each other, and at least one cooling water pipe 210 is respectively disposed on the first side 110 and the second side 120. Two cooling water pipes 210 at the same height on the first side 110 and the second side 120 are connected by a transverse connecting portion 132.

[0079] In some embodiments of this application, multiple cooling water pipes 210 are provided at intervals along the height direction of the first side 110 and the second side 120, and the heights of the cooling water pipes 210 on the first side 110 and the second side 120 correspond one-to-one.

[0080] The number and location of the cooling water pipes 210 can be designed specifically to meet the actual design and burner height requirements, in order to improve heat utilization.

[0081] Positioning grooves extending outward from the burner are formed at corresponding positions on the first side 110 and the second side 120. Specifically, the positioning grooves are formed by pressing at corresponding positions on the first side 110 and the second side 120. The cooling water pipe 210 is connected in the corresponding positioning groove. The positioning groove is used to position and connect the cooling water pipe 210.

[0082] In other words, in the gas water heater involved in this application, the combustion of the burner takes place in the upper cavity of the installation inner cavity, generating high-temperature flue gas. To prevent the wall temperature of the outer shell 100 from being too high, a cooling water passage is provided on the upper cavity wall of the heat exchanger 300. That is, the cooling water passage corresponds to the position of the burner. Positioning grooves for positioning the cooling water pipe 210 are formed on the first side 110 and the second side 120. The positioning grooves are formed by pressing on the first side 110 and the second side 120, and the cooling water pipe 210 is welded to the positioning grooves by solder.

[0083] The housing 100 also includes a first end face 130 and a second end face 140 disposed opposite to each other, and a first side face 110 and a second side face 120 connected between the first end face 130 and the second end face 140.

[0084] A transverse connecting portion 132 is formed on the first end face 130. The transverse connecting portion 132 includes a transverse connecting groove extending outward from the first end face 130. The transverse connecting groove is covered by a cover plate at the opening position in the mounting cavity. A transverse connecting cavity is formed between the cover plate and the transverse connecting groove. A connection port for connecting to the cooling water pipe 210 is provided on the cover plate. One end of the cooling water pipe 210 is connected to the transverse connecting cavity through the connection port.

[0085] A longitudinal connecting portion 143 connected to the heat exchanger 300 is formed on the second end face 140. The longitudinal connecting portion 143 is close to the first side face 110, and a longitudinal connecting cavity for connecting each cooling water pipe 210 on the first side face 110 is formed inside the longitudinal connecting portion 143.

[0086] In addition, a confluence portion 142 connected to the water outlet portion 141 is formed on the second end face 140, and a confluence cavity for connecting the cooling water pipes 210 on the second side face 120 is formed in the confluence portion 142.

[0087] Similar to the transverse connecting portion 132, the longitudinal connecting portion 143 includes a longitudinal connecting groove formed on the first end face 130, which is covered by a cover plate. The cover plate is provided with longitudinally arranged connecting ports that connect to each cooling water pipe 210 on the first end face 130, for connecting the other end of the cooling water pipe 210.

[0088] For ease of understanding, the cooling water pipe 210 is defined to include a first end and a second end. The first end of each cooling water pipe 210 on the first side 110 is connected to the transverse connecting portion 132 on the first end face 130, and the second end of the cooling water pipe 210 on the first side 110 is connected to the longitudinal connecting portion 143 on the second end face 140.

[0089] The first end of each cooling water pipe 210 on the second side 120 is connected to the transverse connecting portion 132 on the first end face 130, and the second end of the cooling water pipe 210 on the second side 120 is connected to the confluence portion 142 on the second end face 140.

[0090] In some embodiments, the manifold 142 is generally L-shaped, with the longitudinally extending portion of the manifold 142 communicating with each cooling water pipe 210 on the second side 120, and the laterally extending portion of the manifold 142 connected to the water outlet 141.

[0091] The L-shaped structure of the manifold 142 can avoid large flow dead zones or slow flow areas in the manifold cavity, thus ensuring smooth fluid flow.

[0092] Water flowing from the heat exchanger 300 flows through the longitudinal connecting part 143 into each cooling water pipe 210 on the first side 110. Water flowing from each cooling water pipe 210 on the first side 110 flows through the corresponding transverse connecting part 132 into the cooling water pipe 210 on the second side 120 at the corresponding height position. After absorbing heat from the outer shell 100, the water is collected in the confluence part 142 and finally output from the water outlet 141.

[0093] For details, please refer to the following: Figure 2 , Figure 4In other embodiments, the heat exchanger 300 includes a sensible heat exchange component 310 and a latent heat exchange component 320 disposed along the height direction of the housing 100, with the sensible heat exchange component 310 located above the latent heat exchange component 320.

[0094] The sensible heat exchange component 310 is a high-temperature section heat exchanger 300. The flue gas generated by the combustion of the burner first exchanges heat with the water flow inside the sensible heat exchange component 310, and then exchanges heat with the second component before being output from the bottom of the outer shell 100.

[0095] The sensible heat exchanger 310 and the latent heat exchanger 320 are installed in an integrated mounting cavity that runs through the top and bottom. The flue gas enters from the top, and the condensate can drip down in the direction of flue gas flow, so that the condensate drips onto the burner and affects combustion.

[0096] The sensible heat exchange assembly 310 includes a plurality of first heat exchange tubes 311 connected in series and a plurality of heat exchange fins 312 spaced apart along the axial direction of the first heat exchange tubes 311. The input end of the sensible heat exchange assembly 310 is connected to the latent heat exchange assembly 320, and the output end is connected to the longitudinal connecting part 143.

[0097] Compared to parallel pipelines where there are areas with slower water flow, leading to a higher probability of scale formation, the first heat exchange tubes 311 are connected in series, which can make the water flow more uniform and reduce scale formation.

[0098] Along the height direction of the outer shell 100, the sensible heat exchange assembly 310 includes at least two layers of first heat exchange tubes 311, which are staggered between adjacent layers to improve heat exchange efficiency.

[0099] Combination Figure 1 , Figure 3 Corresponding to the sensible heat exchange component 310, a flow portion is formed on both the first end face 130 and the second end face 140. Specifically, a first flow portion 133 is formed on the first end face 130 and a second flow portion 144 is formed on the second end face 140.

[0100] Similar to the transverse connecting portion 132, the first transfer portion 133 and the second transfer portion 144 respectively include transfer grooves formed on the first end face 130 and the second end face 140. The transfer grooves are covered with cover plates, and the cover plates are provided with connection ports for connecting to the corresponding first heat exchange tubes 311, so as to connect adjacent first heat exchange tubes 311 in series with each other. After the first heat exchange tubes 311 in each layer are connected in series with each other, they are connected in series with the adjacent upper layer first heat exchange tubes 311.

[0101] For ease of understanding, in some embodiments, the sensible heat exchange assembly 310 includes an upper heat exchange tube group and a lower heat exchange tube group, both of which include a plurality of first heat exchange tubes 311 spaced apart along the horizontal direction.

[0102] The first heat exchange tube 311 near the first side 110 in the lower heat exchange tube group is connected to the latent heat exchange component 320. The first heat exchange tube 311 near the second side 120 in the upper heat exchange tube group is connected in series with the lower heat exchange tube group. The first heat exchange tube 311 near the first side 110 in the upper heat exchange tube group is connected to the cooling water pipe 210.

[0103] The water in the latent heat exchange component 320 is first delivered to the first heat exchange tube 311 connected to it, and then passes through each of the first heat exchange tubes 311 in the lower heat exchange tube group in sequence before being delivered to the upper heat exchange tube group. After flowing through each of the first heat exchange tubes 311 in the upper heat exchange tube group, it is output to the cooling water pipe 210.

[0104] In some embodiments, the cross-sectional shape of each of the first heat exchange tubes 311 is elliptical and they are staggered to increase the contact area with the flue gas.

[0105] refer to Figure 5 , Figure 10 , Figure 11 The heat exchange fins 312 are arranged along the axial direction of the first heat exchange tube 311. The heat exchange fins 312 are equipped with flow guide profiles 3122 and flow guide flanges 3123 to guide the flow of flue gas and improve the heat exchange efficiency.

[0106] Specifically, the heat exchange fins 312 have mounting ports 3121, and the heat exchange fins 312 are connected to the first heat exchange tube 311 in the sensible heat exchange assembly 310 and the latent heat exchange assembly 320 through the mounting ports 3121.

[0107] The flow guide profile 3122 is specifically formed on the heat exchange fins 312 between adjacent mounting ports 3121. The flow guide profile 3122 has flow guide slopes on both sides to guide the airflow toward the mounting port 3121, thereby increasing the amount of flue gas in contact with the first heat exchange tube 311 and improving the heat exchange efficiency.

[0108] The guide flange 3123 is formed at the edge of the heat exchange fin 312, and a guide slope is also formed on it. Similarly, the guide slope on the guide flange 3123 is also used to guide the flue gas to the installation port 3121 to improve the heat exchange efficiency with the first heat exchange tube 311.

[0109] The heat exchange fins 312 are made of stainless steel. Since stainless steel has a low thermal conductivity, a large area of ​​material is removed from the heat exchange fins 312 to prevent them from burning out due to excessive heat due to insufficient heat conduction.

[0110] refer to Figure 6 , Figure 7In some other embodiments, a turbulence-inducing part 313 is provided inside the first heat exchange tube 311, which is used to increase the resistance of water flow inside the first heat exchange tube 311.

[0111] The turbulence section 313 is specifically a ribbon-shaped turbulence strip. The degree of twisting of the ribbon has different effects on the heat exchange effect and water resistance. The two ends of the turbulence section 313 are welded to the first heat exchange tube 311 to play a fixing role.

[0112] Of course, the spoiler 313 can also be configured in other forms, such as a spiral shape.

[0113] Combination Figure 4 , Figure 8 , Figure 9 In some embodiments of this application, at least two sets of latent heat exchange components 320 are provided in the mounting cavity along the height direction of the outer shell 100.

[0114] Adjacent latent heat exchange components 320 are connected in series. The upper latent heat exchange component 320 is provided with multiple sets of first heat exchange units 321 connected in parallel, and the lower latent heat exchange component 320 is provided with multiple sets of second heat exchange units 323 connected in parallel.

[0115] The different first heat exchange units 321 are arranged vertically, and each first heat exchange unit 321 includes multiple second heat exchange tubes 3201 arranged along the horizontal direction. The second heat exchange tubes 3201 in the same first heat exchange unit 321 are connected in series.

[0116] Different second heat exchange units 323 are arranged vertically, and each second heat exchange unit 323 includes multiple second heat exchange tubes 3201 arranged along the horizontal direction. The second heat exchange tubes 3201 in the same second heat exchange unit 323 are connected in series.

[0117] The second heat exchange tubes 3201 in adjacent first heat exchange units 321 are arranged alternately, and the second heat exchange tubes 3201 in adjacent second heat exchange units 323 are arranged alternately.

[0118] The staggered arrangement of the second heat exchange tubes 3201 can increase the contact area between the flue gas and each second heating tube, thereby improving the heat exchange efficiency.

[0119] In some embodiments, the water inlet 131 is disposed on the first end face 130, and the second heat exchange unit 323 and the first heat exchange unit 321 are connected by an external connecting pipe 135. The external connecting pipe 135 is a bent pipe structure and is disposed on the first end face 130. The material of the external connecting pipe 135 can be a flexible hose or a rigid pipe such as stainless steel or a cylinder.

[0120] The chain end of the external connecting pipe 135 is also provided with a sealing ring, which is used to improve the sealing performance of the connection between the external connecting pipe 135 and the first heat exchange unit 321 and the second heat exchange unit 323.

[0121] In other embodiments, the external connecting pipe 135 may also be similar to the transverse connecting portion 132, and fluid communication between the first heat exchange unit 321 and the second heat exchange unit 323 may be achieved through a connecting groove and a cover plate formed on the first end face 130.

[0122] In one specific embodiment, the inner cavity includes two sets of latent heat exchange components 320 arranged vertically. The latent heat exchange component 320 located in the lower layer is connected to the water inlet 131, and the latent heat exchange component 320 located in the upper layer is connected to the sensible heat exchange component 310 through the bend 3202.

[0123] The upper and lower latent heat exchange components 320 are connected by a transition part 134. The transition part 134 is similar to the longitudinal connecting part 143, and is a connecting groove formed longitudinally on the first end face 130. A cover plate is provided on it for connecting the two sets of latent heat exchange components 320.

[0124] The upper second heat exchange unit 323 includes four first heat exchange units 321 connected in parallel. Each first heat exchange unit 321 includes multiple horizontally connected second heat exchange tubes 3201, and adjacent second heat exchange tubes 3201 are connected by a bend 3202 to realize that each second heat exchange tube 3201 in the first heat exchange unit 321 is connected in series.

[0125] In a specific embodiment, in the lower latent heat exchange component 320, the second heat exchange tubes 3201 in each of the second heat exchange units 323 near the first side 110 are connected to the water inlet section 131 through a water inlet adapter.

[0126] In the upper latent heat exchange component 320, the second heat exchange tubes 3201 in each of the first heat exchange units 321 near the first side 110 are connected to the sensible heat exchange component 310 through the external connecting pipe 135.

[0127] The adapter 134 is located on the first end face 130 near the second side face 120, and is used to connect the various second heat exchange tubes 3201 that are connected in parallel in the first heat exchange unit 321 and the second heat exchange unit 323 near the second side face 120.

[0128] Water flowing from the inlet 131 enters the lower latent heat exchange component 320 synchronously, passes through four parallel second heat exchange units 323 and is transported to the transfer unit 134, then through the transfer unit 134 to each of the first heat exchange units 321 in the upper latent heat exchange component 320, and finally through the external connecting pipe 135 to the sensible heat exchange component 310.

[0129] A baffle 322 is formed between adjacent latent heat exchange components 320, and a flue gas outlet 3221 is formed on the baffle 322 for flue gas to pass through.

[0130] Specifically, the flue gas outlet 3221 is located at the corresponding position of the second heat exchange tube 3201 to improve the contact between the second heat exchange tube 3201 and the flue gas, reduce the passage of flue gas through the bend 3202, and improve the heat exchange efficiency.

[0131] In other embodiments, the second heat exchange tube 3201 is a corrugated tube, which reciprocates through the bend 3202 to fill the heat exchange cavity. Along the height direction, adjacent second heat exchange tubes 3201 are staggered to improve heat exchange efficiency.

[0132] To save space, the bent section 3202 is flattened, and a limiting groove 145 is formed on the first end plate and the second end plate corresponding to the position of the bent section 3202. The bent section 3202 is positioned by the limiting groove 145, which plays a role in fixing the second heat exchange tube 3201.

[0133] The first side surface 110 and the second side surface 120 are respectively provided with connecting bends 150 on their periphery, and the first end surface 130 and the second end surface 140 are provided with connecting bends 150 at their upper and lower ends for connecting and fixing to each other or to other structures.

[0134] The outer casing 100 is made of stainless steel. The two ends of the first side 110 and the second side 120 are fixed between the first end face 130 and the second end face 140 by welding or mechanical connection, respectively.

[0135] The first side 110 or the second side 120 has mounting holes for the ignition needle and the sensing needle, as well as a viewing window.

[0136] Combination Figure 9 During operation, water flows into the latent heat exchange component 320 from the water inlet 131. As the flue gas flows through the latent heat exchange component 320, its temperature is relatively low after heat exchange with the sensible heat exchange component 310. The water temperature and flue gas temperature in the latent heat exchange component 320 are both low, making condensation easy to occur. The second heat exchange tube 3201 in the latent heat exchange component 320 is a corrugated tube, which can provide a larger area than a bare tube, improving heat exchange efficiency and promoting condensation.

[0137] The water flow output from the latent heat exchange component 320 is input into the sensible heat exchange component 310. The sensible heat exchange component 310 is the main heat exchange area because there is a large temperature difference between the high-temperature flue gas generated by combustion and the water in the first heat exchanger 300. Most of the heat in the flue gas is removed by the first heat exchanger 300.

[0138] Afterwards, the water output from the first heat exchanger 300 enters the cooling water channel at the top of the mounting cavity to reduce the temperature of the outer shell 100 and prevent the wall surface temperature from becoming too high.

[0139] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0140] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0141] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. A gas water heater, characterised in that, include: The outer casing has a through-hole mounting cavity inside. A burner is used to burn combustible gases; A heat exchanger, which includes sensible heat exchange components and latent heat exchange components; A cooling pipe assembly is disposed on the inner wall of the mounting cavity, and the cooling pipe assembly is located on at least one side of the burner; The burner, the sensible heat exchanger, and the latent heat exchanger are arranged in the mounting cavity from top to bottom, and the cooling pipe assembly, the sensible heat exchanger, and the latent heat exchanger are connected in sequence.

2. The gas water heater according to claim 1, characterized in that, The outer casing is provided with a water inlet and a water outlet. The water inlet is connected to one end of the latent heat exchange component, the other end of the latent heat exchange component is connected to one end of the sensible heat exchange component, the other end of the sensible heat exchange component is connected to one end of the cooling pipe assembly, and the other end of the cooling pipe assembly is connected to the water outlet.

3. The gas water heater according to claim 2, characterized in that, The housing includes a first side and a second side disposed opposite to each other. At least one cooling water pipe is provided on the first side and the second side respectively. Two cooling water pipes at the same height on the first side and the second side are connected by a transverse connecting portion.

4. The gas water heater according to claim 3, characterized in that, The outer casing also includes a first end face and a second end face disposed opposite to each other. The transverse connecting portion is formed on the first end face. A longitudinal connecting portion connected to the heat exchanger and a confluence portion connected to the water outlet are formed on the second end face. A longitudinal connecting cavity for connecting each of the cooling water pipes on the first side is formed in the longitudinal connecting portion. A confluence cavity for connecting each of the cooling water pipes on the second side is formed in the confluence portion.

5. The gas water heater according to claim 4, characterized in that, The sensible heat exchange component includes a plurality of first heat exchange tubes connected in series and a plurality of heat exchange fins spaced apart along the axial direction of the first heat exchange tubes. The input end of the sensible heat exchange component is connected to the latent heat exchange component, and the output end of the sensible heat exchange component is connected to the longitudinal connecting portion.

6. The gas water heater according to claim 5, characterized in that, Along the height direction of the outer shell, the sensible heat exchange assembly includes at least two layers of first heat exchange tubes, with the first heat exchange tubes in adjacent layers arranged alternately; and / or The first heat exchange tube is provided with a turbulence-inducing part, which is used to increase the resistance of water flow in the first heat exchange tube.

7. The gas water heater according to claim 4, characterized in that, Along the height direction of the outer shell, at least two sets of latent heat exchange components are provided in the mounting cavity. Adjacent latent heat exchange components are connected in series. Each latent heat exchange component includes multiple sets of second heat exchange units connected in parallel. Each set of second heat exchange units includes multiple second heat exchange tubes connected in series. The second heat exchange tubes in adjacent second heat exchange units are arranged alternately.

8. The gas water heater according to claim 7, characterized in that, The water inlet is connected to the latent heat exchange component at the bottom layer via a water inlet adapter. The sensible heat exchange component is connected to the latent heat exchange component at the top layer. A baffle is formed between adjacent latent heat exchange components, and a flue gas outlet is formed on the baffle for flue gas to pass through.

9. The gas water heater according to claim 8, characterized in that, The second heat exchange tube is a corrugated tube. A bend is provided between two second heat exchange tubes connected in series in the same second heat exchange unit. The position of the flue gas outlet corresponds to the position of the second heat exchange tube.

10. The gas water heater according to claim 4, characterized in that, The outer shell is made of stainless steel, and the two ends of the first side and the second side are fixed between the first end face and the second end face by welding or mechanical connection, respectively.

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