Condensing heat exchanger and outdoor gas water heater

Abstract

The invention relates to a condensation heat exchanger and an outdoor type gas water heater, the condensation heat exchanger comprises a smoke collecting hood, a condensation heat exchange module and a flow guide structure, a smoke inlet is formed in the bottom of the smoke collecting hood, and a smoke outlet is formed in the side wall face of the smoke collecting hood; the condensation heat exchange module is arranged in the exhaust fume collecting hood; the flow guide structure is arranged in the exhaust fume collecting hood and located at the bottom of the condensation heat exchange module, a heat insulation space is further formed in the flow guide structure, and exhaust fume flows in through the exhaust fume inlet, is guided by the flow guide structure and flows to the side, away from the exhaust fume outlet, of the exhaust fume collecting hood. The flue gas exchanges heat with the condensation heat exchange module and then flows out of the flue gas outlet; condensate water generated by the condensation heat exchange module is guided by the guide structure and discharged out of the exhaust fume collecting hood, and the condensate water flows through the top of the heat insulation space. The problem that an outdoor gas water heater is not high in heat exchange efficiency is solved.

Description

Technical Field

[0001] The present application relates to the technical field of water heaters, and in particular to a condensing heat exchanger and an outdoor gas water heater having the condensing heat exchanger. Background Art

[0002] The condensing heat exchanger is an important component of a gas water heater. On the one hand, the condensing heat exchanger can cool down the flue gas generated by the burner, and on the other hand, it can preheat the water in the pipeline to improve the thermal efficiency of the gas water heater. However, existing outdoor gas water heaters usually do not have a condensing heat exchanger, resulting in low heat exchange efficiency of the whole machine. At present, there is also a lack of a condensing heat exchanger suitable for outdoor gas water heaters. Summary of the Invention

[0003] The present application provides a condensing heat exchanger and an outdoor gas water heater, aiming to improve the heat exchange efficiency of the outdoor gas water heater.

[0004] In a first aspect, the present application provides a condensing heat exchanger for an outdoor gas water heater, the condensing heat exchanger comprising:

[0005] A smoke collecting hood, a smoke inlet is formed at the bottom of the smoke collecting hood, and a smoke outlet is formed on the side wall surface of the smoke collecting hood;

[0006] A condensing heat exchange module, disposed inside the smoke collecting hood;

[0007] A flow guiding structure, disposed inside the smoke collecting hood and at the bottom of the condensing heat exchange module, the flow guiding structure further forms a heat insulation space, the flue gas flows in through the smoke inlet, is guided by the flow guiding structure and flows to the side of the smoke collecting hood away from the smoke outlet, and then exchanges heat with the condensing heat exchange module and flows out from the smoke outlet;

[0008] The condensed water generated by the condensing heat exchange module is guided by the flow guiding structure and discharged from the smoke collecting hood, and the condensed water flows through the top of the heat insulation space.

[0009] In an embodiment of the present application, the flow guiding structure comprises:

[0010] A first flow guiding member, fixed to the inner wall surface of the smoke collecting hood and close to the smoke inlet, the first flow guiding member forms an angle with the horizontal plane and guides the flue gas flowing into the smoke inlet to the side away from the smoke outlet;

[0011] A second flow guiding member, fixed to the inner wall surface of the smoke collecting hood and located between the first flow guiding member and the condensing heat exchange module;

[0012] An insulating space is formed between the first flow guide member and the second flow guide member, and the second flow guide member is configured to divert and discharge the condensed water generated by the condensation heat exchange module out of the smoke collecting hood.

[0013] In one embodiment of the present application, the smoke collecting hood has a first end and a second end in the length direction, and the condensation heat exchange module, the first flow guide member, and the second flow guide member all extend from the first end to the second end;

[0014] The smoke collecting hood further has a first side and a second side in the width direction. The flue gas outlet is provided on the first side. The first flow guide member is inclined upward from the first side to the second side, and the projected width of the first flow guide member on the horizontal plane is less than the width of the smoke collecting hood.

[0015] In one embodiment of the present application, the first flow guide member includes a first flow guide surface and a second flow guide surface connected to each other. The first flow guide surface is disposed at an angle with the horizontal plane. The second flow guide surface is connected to an end of the first flow guide surface away from the flue gas outlet and extends in the vertical direction. An arc transition is formed between the first flow guide surface and the second flow guide surface;

[0016] Flanging structures are formed on the sides of the first flow guide surface and the second flow guide surface, and the first flow guide member is fixed to the inner wall surface of the smoke collecting hood through the flanging structures.

[0017] In one embodiment of the present application, the angle between the first flow guide surface and the horizontal plane is α, satisfying the condition: 5° ≤ α ≤ 80°.

[0018] In one embodiment of the present application, a drain port is further provided at the first end of the smoke collecting hood. The second flow guide member is inclined downward from the second side to the first side, and the second flow guide member is also inclined downward from the second end to the first end, so that the condensed water collected by the second flow guide member is discharged through the drain port.

[0019] In one embodiment of the present application, the second flow guide member includes:

[0020] A flow guide main body, the flow guide main body and the first flow guide surface form the insulating space;

[0021] A surrounding edge structure, connected to the side of the flow guide main body and extending in a direction away from the flow guide main body. The surrounding edge structure is fixed to the inner wall surface of the smoke collecting hood, and the surrounding edge structure and the flow guide main body enclose a water collecting space. The surrounding edge structure forms a notch at a position corresponding to the drain port.

[0022] In one embodiment of the present application, a water inlet and a water outlet are respectively provided at the first end and the second end of the smoke collecting hood. A first water chamber is further formed on the side wall surface of the first end, and a second water chamber is further formed on the side wall surface of the second end;

[0023] The condensation heat exchange module includes a plurality of condensation tube groups arranged at intervals in the width direction of the smoke collecting hood. Two ends of one of the condensation tube groups are respectively connected to the water inlet and the second water chamber. Two ends of another one of the condensation tube groups are respectively connected to the first water chamber and the second water chamber. Two ends of the remaining condensation tube groups are respectively connected to the first water chamber and the second water chamber.

[0024] In one embodiment of the present application, a plurality of condensation tubes arranged at intervals are provided in each of the condensation tube groups, and the outer diameter of the condensation tubes is 5 to 8 mm.

[0025] On the other hand, the present application further provides an outdoor gas water heater. The outdoor gas water heater includes the above-mentioned condensation heat exchanger, and the outdoor gas water heater further includes a burner, and the condensation heat exchanger is arranged on the top of the burner.

[0026] In the condensation heat exchanger in the solution of the present application, a condensation heat exchange module and a diversion structure are arranged in the smoke collecting hood. Among them, the diversion structure can guide the flue gas passing through the flue gas inlet to the side of the smoke collecting hood far away from the flue gas outlet, so that the flow path of the flue gas in the smoke collecting hood is extended, the residence time of the flue gas in the smoke collecting hood is increased, the contact time between the flue gas and the condensation heat exchange module is prolonged, and the heat exchange efficiency is improved. At the same time, the condensed water generated during the heat exchange process of the condensation heat exchange module can be collected by the diversion structure and discharged from the smoke collecting hood through the guidance of the diversion structure, which can prevent the condensed water from accumulating in the smoke collecting hood. Since the diversion structure can also form a heat insulation space, and the condensed water flows through the top of the heat insulation space, it can effectively prevent the condensed water from contacting the high-temperature flue gas at the flue gas inlet and causing evaporation and vaporization of the condensed water, and also prevent the high-temperature flue gas from exchanging heat with the condensed water and then flowing through the condensation heat exchange module for heat exchange, effectively avoiding heat loss, making the heat exchange effect between the high-temperature flue gas and the condensation heat exchange module better, and further improving the heat exchange efficiency of the outdoor gas water heater. Description of the Drawings

[0027] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments in line with the present invention and used together with the specification to explain the principles of the present invention.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0029] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the figures do not constitute a scale limitation.

[0030] Figure 1 It is a schematic structural diagram of an outdoor gas water heater according to an embodiment of the present application;

[0031] Figure 2 is Figure 1 a schematic structural diagram of the condensation heat exchanger in

[0032] Figure 3 is Figure 2 a schematic structural diagram of the condensation heat exchanger from another perspective in

[0033] Figure 4 is Figure 2 a front view of the condensation heat exchanger in

[0034] Figure 5 is Figure 4 a sectional view taken along line A-A of the condensation heat exchanger in

[0035] Figure 6 is Figure 2 a rear view of the condensation heat exchanger in

[0036] Figure 7 is Figure 6 a front view of the sectional view taken along line B-B of the condensation heat exchanger in

[0037] Figure 8 It is a schematic structure of the first flow guide member;

[0038] Figure 9 It is a schematic structure of the second flow guide member;

[0039] Figure 10 It is a motion simulation effect diagram of the flue gas flowing through the condensation heat exchanger.

[0040] Explanation of reference numerals in the drawings:

[0041] 10, smoke collecting hood; 11, flue gas inlet; 12, flue gas outlet; 13, water inlet; 14, water outlet; 15, first water chamber; 16, second water chamber; 17, drain outlet; 18, mounting ear;

[0042] 20, condensation heat exchange module; 21, condensation tube group;

[0043] 30. Flow guiding structure; 31. First flow guiding member; 311. First flow guiding surface; 313. Second flow guiding surface; 315. Flanging structure; 33. Second flow guiding member; 331. Flow guiding main body; 333. Enclosing edge structure; 3331. Notch; 35. Heat insulation space;

[0044] 100. Condensing heat exchanger; 200. Burner; 300. Heat exchanger; 1000. Outdoor gas water heater. Detailed implementation manners

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, rather than all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0046] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and settings discussed.

[0047] For ease of description, spatially relative relationship terms may be used in the text to describe the relative position relationship or movement of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "upper", "front", "rear", etc. Such spatially relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip, posture change, or movement state change, then these directional indications will change accordingly. For example, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "upper" other elements or features. Therefore, the exemplary term "below" may include both upper and lower orientations. The device may be otherwise oriented and the spatially relative relationship descriptors used in the text are interpreted accordingly.

[0048] The condensing heat exchanger is an important component in an outdoor gas water heater. On the one hand, the condensing heat exchanger can cool down the flue gas generated by the burner, and on the other hand, it can preheat the water in the pipeline to improve the thermal efficiency of the outdoor gas water heater. In the related art, when the flue gas generated by the burner flows through the condensing heat exchanger, it fails to make full contact with the condensing heat exchanger, resulting in the problem of low heat exchange efficiency of the condensing heat exchanger. This application provides a condensing heat exchanger, aiming to solve the problem of low heat exchange efficiency of the condensing heat exchanger in the existing outdoor gas water heater.

[0049] Please refer to Figures 1 to 7 , this application provides a condensing heat exchanger 100 for an outdoor gas water heater 1000. The condensing heat exchanger 100 includes:

[0050] A smoke collecting hood 10, a condensing heat exchange module 20, and a diversion structure 30. A flue gas inlet 11 is formed at the bottom of the smoke collecting hood 10, and a flue gas outlet 12 is formed on the side wall surface of the smoke collecting hood 10; the condensing heat exchange module 20 is arranged inside the smoke collecting hood 10;

[0051] The diversion structure 30 is arranged inside the smoke collecting hood 10 and is located at the bottom of the condensing heat exchange module 20. The diversion structure 30 also forms a heat insulation space 35. The flue gas flows in through the flue gas inlet 11, is guided by the diversion structure 30 and flows to the side of the smoke collecting hood 10 away from the flue gas outlet 12, and then flows out from the flue gas outlet 12 after exchanging heat with the condensing heat exchange module 20;

[0052] The condensed water generated by the condensing heat exchange module 20 is diverted by the diversion structure 30 and discharged from the smoke collecting hood 10, and the condensed water flows through the top of the heat insulation space 35.

[0053] The smoke collecting hood 10 is usually arranged at the top of the heat exchanger 300, and a burner 200 is provided at the bottom of the heat exchanger 300. The structure of the smoke collecting hood 10 is generally a cubic structure, that is, the smoke collecting hood 10 has a length direction, a width direction, and a height direction. The bottom of the smoke collecting hood 10 is provided with an opening, that is, a flue gas inlet 11 is formed, and the flue gas outlet 12 is arranged on the side wall in the width direction of the smoke collecting hood 10. In one embodiment, the flue gas outlet 12 is arranged on the front side wall of the smoke collecting hood 10, and this kind of structure is applicable to the outdoor gas water heater 1000. It can be understood that each side wall of the smoke collecting hood 10 is a plate, and the plates can be connected by screws or by welding. The inside of the smoke collecting hood 10 provides an installation space for the condensation heat exchange module 20 and the diversion structure 30, and at the same time, it is also convenient for the whole condensation heat exchanger 100 to be formed into a module, which is convenient for installation or maintenance with other components of the outdoor gas water heater 1000. It can be understood that a sealing structure is also arranged between the components of the smoke collecting hood 10, and the sealing structure can be directly welded to achieve the purpose of preventing smoke leakage or water leakage.

[0054] The condensation heat exchange module 20 is connected to the smoke collecting hood 10. Specifically, the condensation heat exchange module 20 includes a condensation heat exchange tube and a water tank. Among them, the water tank can be directly formed on the side walls at both ends in the length direction of the smoke collecting hood 10, or can be independently arranged and fixed at both ends in the length direction of the smoke collecting hood 10. Among them, the first water chamber 15 is located at the first end in the length direction of the smoke collecting hood 10, and the second water chamber 16 is located at the second end in the length direction of the smoke collecting hood 10. The shapes and positions of the first water chamber 15 and the second water chamber 16 need to be reasonably set according to the arrangement of the condenser tube group 21 and the positions of the water inlet 13 and the water outlet 14. It can be understood that by setting the first water chamber 15 and the second water chamber 16, it is used to realize the flow of water between adjacent condenser tube groups 21, so that the condenser tube group 21 reciprocates in the length direction of the smoke collecting hood 10 and circulates in an S-shaped detour, as much as possible extending the path of the water flow, increasing its heat exchange area with the flue gas, and at the same time extending the heat exchange time between the water flow and the flue gas, thereby improving the heat exchange effect. It can be understood. The condensation heat exchange module 20 includes a plurality of condenser tube groups 21, and the plurality of condenser tube groups 21 are arranged at intervals in the width direction of the box body. Among them, the two ends of the condenser tube group 21 close to the first side are respectively connected to the water inlet 13 and the second water chamber 16, the two ends of the condenser tube group 21 far from the first side are respectively connected to the first water chamber 15 and the water outlet 14, and the two ends of the condenser tube group 21 located in the middle are respectively connected to the first water chamber 15 and the second water chamber 16.

[0055] Understandably, the water flowing into the water inlet 13 is tap water, and the water flowing out of the water outlet 14 is the water preheated by the condensation heat exchanger 100. The water preheated by the condensation heat exchanger 100 flows through a pipeline to the heat exchanger 300, where the heat exchanger 300 is directly heated by the burner 200. The heat exchanger 300 and the burner 200 are prior arts, and the specific structures of the heat exchanger 300 and the burner 200 will not be introduced here.

[0056] A plurality of condensers arranged at intervals are provided in each condenser group 21, and the outer diameter of each condenser ranges from 5 mm to 8 mm. In this way, it can be ensured that the surface area of the condensation heat exchange module 20 is large enough, thereby improving the heat exchange effect. It should be noted that the number of condensers in the condenser group 21 can be 6, 8, 10, etc., which is not limited here.

[0057] In the condensation heat exchanger 100 of the solution of the present application, a condensation heat exchange module 20 and a diversion structure 30 are provided in the smoke collecting hood 10. Among them, the diversion structure 30 can guide the smoke passing through the smoke inlet 11 to the side of the smoke collecting hood 10 away from the smoke outlet 12, so that the flow path of the smoke in the smoke collecting hood 10 is extended, the residence time of the smoke in the smoke collecting hood 10 is increased, the contact time between the smoke and the condensation heat exchange module 20 is extended, and the heat exchange efficiency is improved. At the same time, the condensed water generated during the heat exchange process of the condensation heat exchange module 20 can be collected by the diversion structure 30 and discharged from the smoke collecting hood 10 through the guidance of the diversion structure 30, which can prevent the condensed water from accumulating in the smoke collecting hood 10. Since the diversion structure 30 can also form a heat insulation space 35, the condensed water flows through the top of the heat insulation space 35, which can effectively prevent the condensed water from contacting the high-temperature smoke at the smoke inlet 11 and causing the condensed water to vaporize, and also prevent the high-temperature smoke from exchanging heat with the condensed water and then flowing through the condensation heat exchange module 20 for heat exchange, effectively avoiding heat loss and making the heat exchange effect between the high-temperature smoke and the condensation heat exchange module 20 better.

[0058] In an embodiment of the present application, the smoke collecting hood 10 has a first end and a second end in the length direction, and the condensation heat exchange module 20, the first diversion member 31, and the second diversion member 33 all extend from the first end to the second end;

[0059] The smoke collecting hood 10 further has a first side and a second side in the width direction. The smoke outlet 12 is provided on the first side. The first diversion member 31 is inclined upward from the first side to the second side, and the projected width of the first diversion member 31 on the horizontal plane is smaller than the width of the smoke collecting hood 10.

[0060] Please refer to Figures 1 to 5 In an embodiment of the present application, the diversion structure 30 includes:

[0061] The first flow guide member 31 is fixed to the inner wall surface of the smoke collecting hood 10 and is disposed near the smoke inlet 11. The first flow guide member 31 forms an angle with the horizontal plane and guides the smoke flowing into the smoke inlet 11 to the side away from the smoke outlet 12.

[0062] The second flow guide member 33 is fixed to the inner wall surface of the smoke collecting hood 10 and is located between the first flow guide member 31 and the condensation heat exchange module 20.

[0063] An insulation space 35 is formed between the first flow guide member 31 and the second flow guide member 33. The second flow guide member 33 is used to guide and discharge the condensed water generated by the condensation heat exchange module 20 out of the smoke collecting hood 10.

[0064] Both the first flow guide member 31 and the second flow guide member 33 are fixed to the inner wall surface of the smoke collecting hood 10 by screws, and the second flow guide member 33 is located at the bottom of the first flow guide member 31. The first flow guide member 31 mainly guides the flow direction of the smoke just entering the smoke inlet 11, and the second flow guide member 33 is used to guide the smoke after being guided by the first flow guide member 31. At the same time, it is also used to collect the condensed water generated on the surface of the condensation heat exchange module 20 and guide the collected condensed water.

[0065] Among them, the length direction of the first flow guide member 31 extends to the first end and the second end of the length direction of the smoke collecting hood 10, and its width direction is slightly smaller than the width of the smoke collecting hood 10, that is, the projected width of the first flow guide member 31 on the horizontal plane is less than the width of the smoke collecting hood 10. The first flow guide member 31 is inclined, and one end in the width direction of the first flow guide member 31 is fixed to the side wall surface provided at the smoke outlet 12. This facilitates guiding all the rock areas entering the smoke inlet 11, so that the smoke first moves towards the second side of the smoke collecting hood 10, then the smoke rises in the smoke collecting hood 10, descends after being blocked by the top plate of the smoke collecting hood 10, and under the combined action of the second flow guide member 33 and the top plate of the smoke collecting hood 10, flows through the area where the condensation heat exchange module 20 is located and then flows out from the smoke outlet 12. In this way, the setting of the flow guide structure 30 effectively extends the flow path of the smoke in the smoke collecting hood 10, increases the contact time between the smoke and the condensation heat exchange module 20, and improves the heat exchange efficiency.

[0066] Since the first deflector 31 forms an angle with the horizontal plane, a heat insulation space 35 is formed between the first deflector 31 and the second deflector 33, which can effectively prevent the high-temperature flue gas that has just entered the smoke collecting hood 10 from contacting the second deflector 33, avoid the heat of the high-temperature flue gas being carried away by the condensed water, and enable the high-temperature flue gas to directly exchange heat with the bath water in the condensation heat exchange module 20, effectively reducing heat loss. Understandably, air can be directly used for heat insulation in the heat insulation space 35, or heat insulation materials can be filled in the heat insulation space 35 to reduce the heat conduction from the flue gas inlet 11 directly to the second deflector. Among them, the heat insulation materials can be ceramic fiber, glass fiber, or heat insulation paint, etc. The first deflector 31 and the second deflector 33 can be flat plate-shaped, or other structures.

[0067] Please refer to Figure 8 , in an embodiment of the present application, the first deflector 31 includes a connected first deflector surface 311 and a second deflector surface 313. The first deflector surface 311 is arranged at an angle with the horizontal plane. The second deflector surface 313 is connected to one end of the first deflector surface 311 away from the flue gas outlet 12 and extends along the vertical direction. An arc transition is formed between the first deflector surface 311 and the second deflector surface 313; flanging structures 315 are formed on the sides of both the first deflector surface 311 and the second deflector surface 313, and the first deflector 31 is fixed to the inner wall surface of the smoke collecting hood 10 through the flanging structures 315.

[0068] In an embodiment of the present invention, the first deflector 31 is a metal sheet metal part, so that the first deflector surface 311, the second deflector surface 313, and the flanging structure 315 are an integral structure to ensure the structural strength of the first deflector 31. Screw holes are provided on the flanging structure 315 to facilitate the use of screws to fix the first deflector 31 to the inner wall surface of the smoke collecting hood 10, or the flanging structure 315 can also be directly welded to the inner wall surface of the smoke collecting hood 10. In one implementation, the second deflector surface 313 can also be formed as the flanging structure 315 of the first deflector surface 311.

[0069] Please refer to Figure 8 , in this embodiment, flanging structures 315 are formed at the first end and the second end in the length direction and the first side in the width direction of the first deflector surface 311. In this way, the first deflector surface 311 can be fixed in three directions to ensure the stability of the fixation of the first deflector 31. Since the width of the first deflector surface 311 in the width direction is smaller than the width direction of the smoke collecting hood 10, the second deflector surface 313 can only form flanging structures 315 at both ends in the length direction to fix the second deflector surface 313 on the inner wall surface of the smoke collecting hood 10.

[0070] Understandably, the angle between the first flow guiding surface 311 and the horizontal plane is α, satisfying the condition: 5° ≤ α ≤ 80°. Among them, α can be 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, and of course it can also be any value within the above range. Understandably, when the angle α between the first flow guiding surface 311 and the horizontal plane is less than 5°, the first flow guiding surface 311 is close to being parallel to the horizontal plane. At this time, it is not conducive to the flue gas flowing into the interior of the smoke collecting hood 10. When the angle α between the first flow guiding surface 311 and the horizontal plane is greater than 80°, the first flow guiding surface 311 is close to a vertical plane. At this time, it is also not conducive to guiding the flue gas to the second side in the length direction of the smoke collecting hood 10.

[0071] Please refer to Figure 2 and Figure 3 , in an embodiment of the present application, a drain port 17 is further provided at the first end of the smoke collecting hood 10. The second guiding member 33 is inclined downward from the second side toward the first side, and the second guiding member 33 is also inclined downward from the second end toward the first end, so that the condensed water collected by the second guiding member 33 is discharged through the drain port 17.

[0072] In an embodiment of the present application, the drain port 17 is used to discharge condensed water. A drain joint can be connected to the drain port 17, and the drain joint extends outside the housing of the outdoor gas water heater 1000 to prevent the condensed water from flowing back into the interior of the water heater.

[0073] Refer to Figure 9 , the second guiding member 33 is also a metal sheet metal structure, and the guiding main body 331 and the surrounding structure 333 are an integral structure, which can ensure the structural strength of the second guiding member 33. The surrounding structure 333 is connected to the side of the guiding main body 331 and extends upward in a direction away from the guiding main body 331. In this way, the surrounding structure 333 can not only be fixed to the inner wall surface of the smoke collecting hood 10, but also the surrounding structure 333 and the guiding main body 331 enclose a water collecting space for blocking the condensed water collected on the surface of the guiding main body 331 from leaking outside the guiding main body 331, so that the condensed water collected on the guiding main body 331 can all flow toward the drain port 17 and be discharged through the drain port 17. Specifically, a notch 3331 is formed on the side of the surrounding structure 333 close to the drain port 17, and this notch 3331 facilitates the condensed water to flow out to the outside of the smoke collecting hood 10. Understandably, a joint can also be provided on the smoke collecting hood 10 to discharge the condensed water.

[0074] Understandably, the angle at which the diversion main body 331 inclines from the second side to the first side is relatively small, usually between 3° and 10°, as long as the condensed water can flow towards the first side. Similarly, the angle at which the diversion main body 331 inclines from the second end to the first end is not large either, usually between 5° and 15°, as long as it is ensured that the condensed water can flow smoothly to the position of the drain port 17. Among them, the diversion main body 331 and the first diversion surface 311 form the heat insulation space 35. The heat insulation space 35 can prevent the high-temperature flue gas from directly contacting the diversion main body 331, ensuring that the diversion main body 331 can always be in a relatively low-temperature state. This can prevent the condensed water from dripping onto the second diversion member 33 from the condensate pipe from evaporating again due to excessive temperature, and at the same time enables the heat of the high-temperature flue gas to directly preheat the water in the condensate pipe, effectively reducing heat loss and improving the heat exchange efficiency.

[0075] On the other hand, the present application also provides an outdoor gas water heater 1000. The outdoor gas water heater 1000 includes a burner 200 and the above-mentioned condensate heat exchanger 100. The condensate heat exchanger 100 is arranged on the top of the burner 200. For the specific structure of the condensate heat exchanger 100, refer to the above-mentioned embodiments. Since the outdoor gas water heater 1000 of the present application adopts all the technical solutions of the above-mentioned all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0076] Understandably, the condensate heat exchanger 100 is also provided with two mounting ears 18. The two mounting ears 18 are respectively arranged at both ends of the smoke collecting hood 10 in the length direction. The condensate heat exchanger 100 is fixed to the bottom of the burner 200 through the two mounting ears 18.

[0077] In the present application, the outer diameter size of the condensate pipe is between 5 mm and 8 mm, and the contact area between the flue gas and the condensate heat exchange module 20 is not less than 100000 mm2. Combined with the diversion structure 30 in the present application, the thermal efficiency of the outdoor gas water heater 1000 is increased from about 90% to more than 102%, greatly saving energy.

[0078] Refer to Figure 10 , through the simulation results of the flue gas flow of the condensate heat exchanger 100, it can be known that when the temperature of the flue gas entering the flue gas inlet 11 is 1300K, the heat flux density is 9000W / m2.K, and the flow velocity of the flue gas at the flue gas inlet 11 is 0.5m / s, the temperature of the flue gas outlet 12 is 351.8K; when the flow velocity of the flue gas at the flue gas inlet 11 is 1.5m / s, the temperature of the flue gas outlet 12 is 362.4K, and when the flow velocity of the flue gas at the flue gas inlet 11 is 3.0m / s, the temperature of the flue gas outlet 12 is 370.9K. From this, it can be known that the smaller the flow velocity of the incoming flue gas, the longer the contact time between the flue gas and the condensate pipe, the more sufficient the heat exchange, and the lower the outlet temperature.

[0079] In the above embodiments, the descriptions of the various embodiments each have their own emphasis. For parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0080] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0081] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0082] In the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0083] In the present application, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0084] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0085] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, provided that these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these changes and modifications therein.

[0086] As described above, the above is the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A condensing heat exchanger (100) for an outdoor gas water heater (1000), characterized in that: The condensing heat exchanger (100) comprises: A smoke collecting hood (10), wherein a smoke inlet (11) is formed at the bottom of the smoke collecting hood (10), and a smoke outlet (12) is formed on a side wall surface of the smoke collecting hood (10); A condensation heat exchange module (20) is arranged inside the smoke collecting hood (10); A flow guiding structure (30) is arranged inside the smoke collecting hood (10) and is located at the bottom of the condensing heat exchange module (20). The flow guiding structure (30) also forms a heat insulating space (35). Smoke flows in through the smoke inlet (11), is guided by the flow guiding structure (30) and flows to a side of the smoke collecting hood (10) away from the smoke outlet (12), and then flows out from the smoke outlet (12) after heat exchange with the condensing heat exchange module (20); The condensed water generated by the condensation heat exchange module (20) is guided through the guide structure (30) and discharged from the smoke collecting hood (10), and the condensed water flows through the top of the heat insulation space (35).

2. The condensing heat exchanger (100) according to claim 1, characterized in that: The flow guiding structure (30) comprises: A first flow guide (31) is fixed to the inner wall surface of the smoke collecting hood (10) and is arranged close to the smoke inlet (11); the first flow guide (31) forms an angle with a horizontal plane and guides the smoke flowing into the smoke inlet (11) to a side away from the smoke outlet (12); A second flow guide (33) is fixed to the inner wall surface of the smoke collecting hood (10) and is located between the first flow guide (31) and the condensing heat exchange module (20); The heat-insulating space (35) is formed between the first flow guide (31) and the second flow guide (33), and the second flow guide (33) is used to guide the condensed water generated by the condensation heat exchange module (20) and discharge it out of the smoke collecting hood (10).

3. The condensing heat exchanger (100) according to claim 2, characterized in that: The smoke collecting hood (10) has a first end and a second end in a length direction, and the condensing heat exchange module (20), the first flow guide (31) and the second flow guide (33) all extend from the first end to the second end; The smoke hood (10) further comprises a first side and a second side in a width direction, the smoke outlet (12) is arranged on the first side, the first flow guide (31) is arranged obliquely upward from the first side to the second side, and the projection width of the first flow guide (31) on a horizontal plane is smaller than the width of the smoke hood (10).

4. The condensing heat exchanger (100) according to claim 3, characterized in that: The first flow guide member (31) comprises a first flow guide surface (311) and a second flow guide surface (313) which are connected to each other, the first flow guide surface (311) being arranged at an angle with a horizontal plane, the second flow guide surface (313) being connected to an end of the first flow guide surface (311) away from the smoke outlet (12) and extending in a vertical direction, and a circular arc transition is formed between the first flow guide surface (311) and the second flow guide surface (313); The side edges of the first flow guide surface (311) and the second flow guide surface (313) are both formed with flange structures (315), and the first flow guide member (31) is fixed to the inner wall surface of the smoke collecting hood (10) via the flange structures (315).

5. The condensing heat exchanger (100) according to claim 4, characterized in that: The angle between the first guide surface (311) and the horizontal plane is α, which satisfies the condition: 5°≤α≤80°.

6. The condensing heat exchanger (100) according to claim 4, characterized in that: The first end of the smoke hood (10) is also provided with a drain port (17), and the second flow guide (33) is arranged to be inclined downward from the second side toward the first side, and the second flow guide (33) is also arranged to be inclined downward from the second end toward the first end, so that condensed water collected by the second flow guide (33) is discharged through the drain port (17).

7. The condensing heat exchanger (100) according to claim 6, characterized in that: The second flow guide (33) comprises: a flow guiding body (331), wherein the flow guiding body (331) and the first flow guiding surface (311) form the heat insulating space (35); The surrounding structure (333) is connected to the side of the guide body (331) and extends in a direction away from the guide body (331). The surrounding structure (333) is fixed to the inner wall surface of the smoke hood (10), and the surrounding structure (333) and the guide body (331) are combined to form a water collection space. The surrounding structure (333) is formed with a notch (3331) at a position corresponding to the drain outlet (17).

8. The condensing heat exchanger (100) according to any one of claims 3 to 7, characterized in that: The first end and the second end of the smoke collecting hood (10) are respectively provided with a water inlet (13) and a water outlet (14); a first water cavity (15) is also formed on the side wall surface of the first end; and a second water cavity (16) is also formed on the side wall surface of the second end; The condensing heat exchange module (20) includes a plurality of condensing tube groups (21) arranged at intervals along the width direction of the smoke hood (10), wherein two ends of one of the condensing tube groups (21) are respectively connected to the water inlet (13) and the second water chamber (16), two ends of another of the condensing tube groups (21) are respectively connected to the first water chamber (15) and the second water chamber (16), and two ends of the remaining condensing tube groups (21) are respectively connected to the first water chamber (15) and the second water chamber (16).

9. The condensing heat exchanger (100) according to claim 8, characterized in that: The condenser tube group (21) is provided with a plurality of condenser tubes arranged at intervals, and the outer diameter of the condenser tubes is 5 to 8 mm.

10. An outdoor gas water heater (1000), characterized in that: The outdoor gas water heater (1000) comprises a condensing heat exchanger (100) as claimed in any one of claims 1 to 9, and further comprises a burner (200), wherein the condensing heat exchanger (100) is arranged on the top of the burner (200).

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