Outdoor gas water heater

Abstract

The outdoor gas water heater comprises a combustor, a heat exchange assembly, a water inlet pipe and a water outlet pipe, the combustor is provided with a combustion chamber, the combustion chamber is used for guiding gas in and combusting the gas, the heat exchange assembly comprises a heat exchange pipe and heat exchange fins, the heat exchange fins are located at the top end of the combustion chamber, and the water inlet pipe and the water outlet pipe are communicated through the heat exchange pipe. The heat exchange pipe penetrates through the heat exchange fins and exchanges heat with the heat exchange fins; the water inlet pipe is communicated with the water inlet end of the heat exchange pipe, and the water outlet pipe is communicated with the water outlet end of the heat exchange pipe. According to the outdoor gas water heater, the heat exchange fins of the heat exchange assembly arranged at the top end of the combustion chamber can conduct heat exchange with combustion heat at the top end of the combustion chamber and then conduct heat exchange with the heat exchange pipes connected to the heat exchange fins in a penetrating mode, and the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to outdoor water heater technical field especially relates to a kind of outdoor gas water heater. BACKGROUND

[0002] The existing outdoor water heater is mainly used for motor home or camping site, etc., and due to the limitation of outdoor conditions, the power supply is usually insufficient, so the commonly used water heater is a gas water heater. The combustion chamber of the gas water heater is used to introduce gas for combustion, and the combustion heat exchanges heat with the coil pipe arranged outside the combustion chamber.

[0003] However, the structure of the existing coil pipe is easy to scale and block the coil pipe structure, making the water flow path complex and tortuous, and the water flow speed varies at different positions. In the coil pipe bending position and near the pipe wall, the water flow speed is relatively slow. When the water contains calcium, magnesium and other ions (hard water), scale is easy to deposit in these slow water flow areas. With the passage of time, scale gradually accumulates, which can cause the inner diameter of the coil pipe to become smaller and the water flow resistance to increase. In severe cases, it may cause the coil pipe to be blocked, greatly reducing the hot water flow, and even unable to normally supply hot water.

[0004] In addition, the scale inside the coil pipe also affects the heat exchange efficiency. The thermal conductivity of scale is much lower than that of metal pipe material. When it adheres to the inner wall of the coil pipe, it increases the heat insulation layer in the heat exchange path, hindering the transfer of heat from the high-temperature flue gas generated by combustion to the water. SUMMARY

[0005] In order to overcome at least one of the defects of the prior art described above, the utility model provides a kind of outdoor gas water heater, which can be arranged at the top of the combustion chamber, and the heat exchange fins of the heat exchange assembly at the top of the combustion chamber exchange heat with the combustion heat, and then exchange heat with the heat exchange pipe connected to the heat exchange fins, to improve the heat exchange efficiency.

[0006] The utility model employs the technical scheme that:

[0007] An outdoor gas water heater includes a burner, a heat exchange assembly, a water inlet pipe and a water outlet pipe. The burner has a combustion chamber for introducing gas and burning. The heat exchange assembly includes a heat exchange pipe and heat exchange fins. The heat exchange fins are located at the top of the combustion chamber, and the heat exchange pipe passes through the heat exchange fins and exchanges heat with them. The water inlet pipe is connected to the water inlet end of the heat exchange pipe, and the water outlet pipe is connected to the water outlet end of the heat exchange pipe.

[0008] The heat exchange assembly further includes a heat exchange housing mounted at the top of the combustion chamber. The interior of the heat exchange housing is connected to the top of the combustion chamber. The heat exchange housing has multiple heat exchange fins, and the heat exchange pipe passes through the heat exchange fins in sequence.

[0009] Furthermore, the heat exchange tube includes at least two vertical tube sections and a curved tube section, and the two vertical tube sections pass through the plurality of heat exchange fins in sequence; the ends of two adjacent vertical tube sections are connected by the curved tube section and extend out of the heat exchange shell; the water inlet pipe is connected to one of the vertical tube sections, and the water outlet pipe is connected to the other vertical tube section.

[0010] Furthermore, at least two groups of the two vertical pipe sections are distributed in the height direction of the heat exchange shell; and the two vertical pipe sections adjacent to each other in the height direction are staggered.

[0011] Furthermore, the outer periphery of the heat exchange shell is provided with a protruding connecting edge and a covering edge, and the covering edge is connected to the outside of the connecting edge and extends downward; the connecting edge is used to abut and connect with the top surface of the combustion chamber when the heat exchange shell is installed on the top of the combustion chamber, and the covering edge is covered on the outer side wall of the top end of the combustion chamber.

[0012] Furthermore, a gas distribution rod assembly is provided at the bottom end of the combustion chamber. The gas distribution rod assembly includes a main gas pipe and a plurality of branch gas pipes. The branch gas pipes are used to disperse the gas introduced by the main gas pipe into the combustion chamber.

[0013] Furthermore, the branch gas pipe is provided with a combustion head and a plurality of gas nozzles, and the plurality of gas nozzles are connected to the branch gas pipe and guide the gas to be sprayed to the combustion head.

[0014] Furthermore, the outdoor gas water heater also includes a smoke exhaust component, which includes a smoke exhaust hood and a smoke exhaust fan. The air inlet end of the smoke exhaust hood is connected to the top of the heat exchange shell, and the air outlet end of the smoke exhaust hood is connected to the outside.

[0015] In summary, the present invention has the following technical effects:

[0016] During combustion heating, heat is generated within the combustion chamber, which can then be exchanged with the heat exchange fins at the top of the combustion chamber. The heat exchange fins increase the heat exchange surface, and heat exchange tubes are inserted into the heat exchange fins. Therefore, water introduced through the water inlet pipe enters the heat exchange tubes and can exchange heat with the heat exchange fins. The larger heat exchange surface of the heat exchange fins allows for faster heat exchange with the heat exchange tubes, improving the heating efficiency of the water within the heat exchange tubes. Furthermore, by exchanging heat directly with the heat exchange fins, cold water can pass through the heating area more quickly, and the water within the heat exchange tubes can more directly contact the heat source, allowing hot water to be delivered more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 Another perspective structure schematic view of the present application;

[0019] Figure 3 A structure schematic view of the heat exchange assembly of the present application;

[0020] Figure 4 A partial structure schematic view of the present application.

[0021] Wherein, the meaning of the reference signs is as follows: 10, burner; 21, heat exchange pipe; 211, vertical pipe section; 212, curved pipe section; 22, heat exchange shell; 221, connecting edge; 222, cover edge; 30, water inlet pipe; 40, water outlet pipe; 41, gas distribution rod assembly; 42, combustion head; 421, gas nozzle. DETAILED DESCRIPTION

[0022] In order to better understand and implement, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application.

[0023] In the description of the present application, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the device or element indicated or implied to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0025] Referring to Figures 1-4 The present application discloses an outdoor gas water heater, comprising a burner 10, a heat exchange assembly, a water inlet pipe 30 and a water outlet pipe 40, specifically, the burner 10 is provided with a combustion chamber, the combustion chamber is used for introducing gas and burning, the heat exchange assembly comprises a heat exchange pipe 21 and a heat exchange fin, the heat exchange fin can be located at the top end of the combustion chamber to exchange heat with the combustion heat in the combustion chamber. The heat exchange pipe 21 passes through the heat exchange fin and exchanges heat with the heat exchange fin. The water inlet pipe 30 is communicated with the water inlet end of the heat exchange pipe 21, and the water outlet pipe 40 is communicated with the water outlet end of the heat exchange pipe 21.

[0026] On the basis of the above structure, when the outdoor gas water heater is used, the burner 10, the heat exchange assembly, the water inlet pipe 30 and the water outlet pipe 40 are all installed in the shell of the gas water heater, the water inlet pipe can be introduced by the panel of the shell and communicated with the water inlet end of the heat exchange pipe 21, and the water outlet pipe 40 can be communicated with the water outlet end of the heat exchange pipe 21 and led out through the panel of the shell, that is, the water inlet and outlet joints are all on the panel of the shell, facilitating the connection of the pipeline.

[0027] When combustion heating is performed, heat can be generated by combustion in the combustion chamber, and the combustion heat can be exchanged with the heat exchange fins at the top end of the combustion chamber, the heat exchange fins increase the heat exchange surface, and the heat exchange pipe 21 is inserted into the heat exchange fins, so that the water flow introduced through the water inlet pipe 30 can be exchanged with the heat exchange fins after entering the heat exchange pipe 21, the heat exchange fins have a large heat exchange surface and can exchange heat with the heat exchange pipe 21 more quickly, thereby improving the heating efficiency of the water flow in the heat exchange pipe 21, and the water flow in the heat exchange pipe 21 can be led out through the water outlet pipe 40 after heat exchange is completed, thereby realizing the provision of hot water.

[0028] That is, in the present embodiment, the heat exchange pipe 21 directly exchanges heat with the heat exchange fins, which can make cold water pass through the heating area more quickly, and the water flow in the heat exchange pipe 21 can directly contact the heat source, thereby enabling hot water to be delivered more quickly.

[0029] Further, the heat exchange assembly further comprises a heat exchange shell 22, the heat exchange shell 22 is installed at the top end of the combustion chamber, the inside of the heat exchange shell 22 is communicated with the top end of the combustion chamber, and a plurality of heat exchange fins are arranged in the heat exchange shell 22; the heat exchange pipe 21 sequentially passes through the heat exchange fins. That is, the heat exchange shell 22 can be directly assembled with the top of the combustion chamber, and the heat exchange fins and the heat exchange pipe 21 are directly assembled to the burner 10 by screws or bolts, compared with the conventional coil heat exchanger which needs to be welded and fixed with the shell of the burner 10, the wall thickness of the welding part is thinned and the corrosion resistance is reduced, which is prone to corrosion problems, and may cause water leakage. The heat exchange structure in the present application reduces the corrosion-prone parts such as welding points, reduces the possibility of corrosion from the structure, and prolongs the service life of the water heater.

[0030] Further, the heat exchange pipe 21 comprises at least two vertical pipe segments 211 and a curved pipe segment 212, and the two vertical pipe segments 211 pass through the plurality of heat exchange fins in sequence, and the end portions of the adjacent two vertical pipe segments 211 are communicated by the curved pipe segment 212; the water inlet pipe 30 is communicated with one of the vertical pipe segments 211, and the water outlet pipe 40 is communicated with the other vertical pipe segment 211. In this way, when the water flow is introduced, it is directly introduced and flowed through the vertical pipe segments 211 passing through the plurality of heat exchange fins in sequence and exchanged heat, and the heat exchange fins exist on the flow path of the water flow in the vertical pipe segments 211, so that the heat exchange is directly performed, and the heat exchange efficiency is higher. In order to improve the heat exchange path of the heat exchange pipe 21, at least two vertical pipe segments 211 are used to guide the flow and exchange heat, so that the vertical pipe segments 211 exchange heat with the plurality of heat exchange fins, and the heat exchange efficiency is high.

[0031] The communication between the adjacent two vertical pipe segments 211 can be conducted by the curved pipe segment 212, and the curved pipe segment 212 can be located outside the heat exchange shell 22, so that the curved pipe segment 212 is used for the flow communication between the adjacent two vertical pipe segments 211 and does not directly participate in the heat exchange, and even if there is scaling in the curved pipe segment 212, the water flow in the curved pipe segment 212 does not directly participate in the heat exchange, so the influence on the heat exchange efficiency is not obvious.

[0032] Further, the heat exchange shell 22 comprises at least two groups of two vertical pipe segments 211 in the height direction; the adjacent two vertical pipe segments 211 are staggered in the height direction, so that there are at least two vertical pipe segments 211 for heat exchange in the horizontal plane, and there are also staggered vertical pipe segments 211 for heat exchange in the vertical plane, and the vertical pipe segments 211 can directly contact the heat source for heat exchange, so that the heat exchange efficiency is improved.

[0033] Specifically, when assembled, the outer periphery of the heat exchange shell 22 is provided with a protruding connecting edge 221 and a cover edge 222, the cover edge 222 is connected to the outside of the connecting edge 221 and extends downward; the connecting edge 221 is used to abut and connect with the top surface of the combustion chamber when the heat exchange shell 22 is installed at the top end of the combustion chamber, and the cover edge 222 covers the outside wall of the top end of the combustion chamber. That is to say, when the heat exchange shell 22 is assembled to the top end of the combustion chamber of the burner 10, the connecting edge 221 at the top end of the heat exchange shell 22 can be sealed and abutted with the opening periphery of the top end of the combustion chamber by a sealing ring or the like, and then connected and clamped by a bolt or a screw or the like connecting structure, so that the heat exchange shell 22 is convenient to disassemble and assemble.

[0034] In addition, after the heat exchange shell 22 is assembled in place, the cover edge 222 outside the connecting edge 221 can cover the outside of the top end of the combustion chamber, so that the sealing fit is achieved, the looseness is reduced, and the sealing property is improved.

[0035] Further, the bottom end of the combustion chamber is provided with a gas distribution rod assembly 41, which includes a main gas pipe and a plurality of branch gas pipes for distributing the gas introduced by the main gas pipe into the combustion chamber.

[0036] Specifically, when the gas is introduced, the gas pipe is in communication with the main gas pipe, and after the gas enters the main gas pipe, it is dispersed and evenly distributed by the branch gas pipes, ensuring that the gas can be evenly distributed to each combustion site of the burner 10. In this way, the flame can be evenly burned on the entire burner 10, avoiding the situation of local flame being too strong or too weak.

[0037] Further, the branch gas pipe is provided with a combustion head 42 and a plurality of gas nozzles 421, which are in communication with the branch gas pipe and guide the gas to be sprayed to the combustion head 42. The gas is transported to the gas nozzle 421 through the branch gas pipe and sprayed out under a certain pressure, mixed with the air entering through the air inlet, so as to realize the rapid mixing of the gas and the air, and then ignited by the ignition device at the combustion head 42 for combustion, with higher combustion efficiency.

[0038] Further, the outdoor gas water heater further comprises a smoke exhaust assembly, which comprises a smoke exhaust hood and a smoke exhaust fan. The air inlet end of the smoke exhaust hood is in communication with the upper part of the heat exchange shell 22, and the air outlet end of the smoke exhaust hood is in communication with the outside. In this way, when the burner 10 is used, the smoke generated by the burner 10 can be guided out of the smoke exhaust hood under the action of the smoke exhaust fan, realizing smoke exhaust. The smoke exhaust hood can flow the smoke, form a stable flow field, and reduce the exhaust noise.

[0039] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above-mentioned embodiments, but also includes technical solutions composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, which are also considered within the protection scope of the utility model.

Claims

1. An outdoor gas water heater characterised in that The outdoor gas water heater comprises a burner, a heat exchange assembly, a water inlet pipe and a water outlet pipe, the burner is provided with a combustion chamber for guiding gas to be combusted, the heat exchange assembly comprises heat exchange tubes and heat exchange fins, the heat exchange fins are located at the top end of the combustion chamber, the heat exchange tubes pass through the heat exchange fins and exchange heat with the heat exchange fins, the water inlet pipe is communicated with the water inlet end of the heat exchange tubes, and the water outlet pipe is communicated with the water outlet end of the heat exchange tubes.

2. The outdoor gas water heater according to claim 1, wherein The heat exchange assembly further comprises a heat exchange shell, the heat exchange shell is installed at the top end of the combustion chamber, the inside of the heat exchange shell is communicated with the top end of the combustion chamber, a plurality of heat exchange fins are arranged in the heat exchange shell, and the heat exchange tubes pass through the heat exchange fins in sequence.

3. The outdoor gas water heater according to claim 2, wherein The heat exchange tubes comprise at least two vertical tube segments and a curved tube segment, the two vertical tube segments pass through the plurality of heat exchange fins in sequence, the end portions of the adjacent two vertical tube segments are communicated with the curved tube segment and extend out of the heat exchange shell, the water inlet pipe is communicated with one of the vertical tube segments, and the water outlet pipe is communicated with the other vertical tube segment.

4. The outdoor gas water heater according to claim 3, wherein At least two groups of the two vertical tube segments are distributed in the height direction of the heat exchange shell, and the adjacent two vertical tube segments are staggered in the height direction.

5. The outdoor gas water heater of claim 2, wherein The outer periphery of the heat exchange shell is provided with a protruding connecting edge and a cover edge, the cover edge is connected to the outside of the connecting edge and extends downward, the connecting edge is used for abutting and connecting with the top end surface of the combustion chamber when the heat exchange shell is installed at the top end of the combustion chamber, and the cover edge covers the outside wall of the top end of the combustion chamber.

6. The outdoor gas water heater according to any one of claims 1 to 5, wherein The bottom end of the combustion chamber is provided with a gas distribution rod assembly, the gas distribution rod assembly comprises a main gas pipe and a plurality of branch gas pipes, the branch gas pipes are used for guiding the gas introduced by the main gas pipe to be dispersed into the combustion chamber.

7. The outdoor gas water heater according to claim 6, wherein The branch gas pipe is provided with a combustion head and a plurality of gas nozzles, the plurality of gas nozzles are communicated with the branch gas pipe and guide the gas to be sprayed to the combustion head.

8. The outdoor gas water heater according to any one of claims 2 to 5, wherein The outdoor gas water heater further comprises an exhaust assembly, the exhaust assembly comprises an exhaust cover and an exhaust fan, the air inlet end of the exhaust cover is communicated with the upper portion of the heat exchange shell, and the air outlet end of the exhaust cover is communicated with the outside.

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