Gas water heater

Abstract

The utility model discloses a gas water heater, which relates to the technical field of water heaters and comprises a condensing heat exchanger, a smoke exhaust pipe and an atomizing component. The smoke exhaust pipe is communicated with the condensing heat exchanger and is provided with a smoke exhaust port for exhausting smoke; the atomization assembly is communicated with the condensation heat exchanger, the atomization assembly is provided with a mist spraying opening which is located in the smoke exhaust pipe and faces the smoke exhaust opening, and the atomization assembly is used for atomizing condensate water generated by the condensation heat exchanger and spraying the condensate water out of the mist spraying opening; according to the utility model, atomized condensate water can be driven to be discharged from the smoke outlet through smoke flowing, and the discharging flowing direction of the atomized condensate water is consistent with the flowing direction of smoke, so that the flowing resistance of the atomized condensate water can be reduced, and the discharging efficiency of the atomized condensate water is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, and particularly to a gas water heater. Background Art

[0002] Under the background of energy conservation and emission reduction, improving the energy efficiency of gas water heaters has become a trend in the industry. Traditional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of vaporization of flue gas, but a large amount of condensed water will be generated during the process of utilizing the latent heat of vaporization of flue gas. In related technologies, some condensing gas water heaters use an atomization module to atomize the condensed water and discharge it along with the flue gas. During the discharge process, there may be problems such as a relatively complex structure for discharging atomized condensed water and poor discharge efficiency. Summary of the Utility Model

[0003] The main object of the utility model is to propose a gas water heater, aiming to improve the discharge efficiency of atomized condensed water.

[0004] To achieve the above object, the gas water heater proposed by the utility model includes:

[0005] A condensing heat exchanger;

[0006] An exhaust pipe, which is communicated with the condensing heat exchanger, and the exhaust pipe is provided with an exhaust port for discharging flue gas; and

[0007] An atomization assembly, the atomization assembly is communicated with the condensing heat exchanger, the atomization assembly has a spray port located in the exhaust pipe and facing the exhaust port, and the atomization assembly is used for atomizing the condensed water generated by the condensing heat exchanger and spraying it out from the spray port.

[0008] In an embodiment, the exhaust pipe has an exhaust passage communicating the condensing heat exchanger with the exhaust port, the atomization assembly includes an atomization module, the atomization module is arranged in the exhaust passage, and the atomization module is provided with the spray port.

[0009] In an embodiment, a conveying channel is arranged in the atomization module, the conveying channel communicates with the spray port, and the extending direction of the conveying channel is arranged parallel to the axial direction of the exhaust pipe.

[0010] In an embodiment, the direction in which the atomized condensed water is sprayed out from the spray port is parallel to the direction of the flue gas flow in the exhaust passage.

[0011] In an embodiment, the atomization assembly further includes a connecting pipe, the connecting pipe is used for connecting the atomization module and the condensing heat exchanger, and the atomization module is arranged close to the inner wall of the exhaust pipe.

[0012] In an embodiment, the atomization module is provided with an external thread portion that is in threaded connection and cooperation with the connecting pipe;

[0013] The atomizing assembly further includes a connecting member, and the atomizing module is fixed to the inner wall of the exhaust pipe through the connecting member.

[0014] In one embodiment, the gas water heater further includes a water collecting assembly, the water collecting assembly communicates the condensation heat exchanger with the atomizing assembly, the water collecting assembly is used for collecting the condensed water generated by heat exchange of the condensation heat exchanger, and for guiding the condensed water to the atomizing assembly.

[0015] In one embodiment, the water collecting assembly includes a water collecting member and a condensate water pipe, the water collecting member is arranged below the condensation heat exchanger, the condensate water pipe communicates the condensation heat exchanger with the water collecting member, and the condensate water pipe is used for introducing the condensed water generated by the condensation heat exchanger into the water collecting member.

[0016] In one embodiment, the water collecting assembly further includes a drainage pump and a drainage pipe, the drainage pipe communicates the water collecting member with the atomizing assembly, the drainage pump is connected in series in the drainage pipe, and the drainage pump is used for pumping the condensed water in the water collecting member to the atomizing assembly through the drainage pipe.

[0017] In one embodiment, the gas water heater further includes a water inlet pipe and a bypass pipe, the water inlet pipe is used for the gas water heater to intake water, the bypass pipe connects the water inlet pipe and the water collecting member, and the bypass pipe is provided with a bypass valve, and the bypass valve is used for controlling the on-off of the bypass pipe.

[0018] The technical solution of the present utility model is to arrange the atomizing assembly in the exhaust pipe, atomize the condensed water generated by heat exchange of the condensation heat exchanger through the atomizing assembly, and the spray port of the atomizing assembly faces the exhaust port, and the atomized condensed water can be discharged towards the exhaust port. In this way, only the condensed water needs to be atomized, and the atomized condensed water can be discharged from the exhaust port by the driving of the flue gas flow. The discharge flow direction of the atomized condensed water is the same as the flow direction of the flue gas, which can reduce the resistance when the atomized condensed water flows, and make the discharge efficiency of the atomized condensed water higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model 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, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0020] Figure 1 It is a schematic structural diagram of an embodiment of the gas water heater provided by the present utility model;

[0021] Figure 2 is Figure 1 a partial enlarged view of part A in

[0022] Figure 3 is an installation schematic diagram of the atomization assembly provided by the present utility model on the smoke exhaust pipe;

[0023] Figure 4 is Figure 3 a cross-sectional view of the atomization assembly in

[0024] Figure 5 is a structural schematic diagram of an embodiment of the water heater body in the present utility model.

[0025] Explanation of the reference numerals in the drawings:

[0026] 10. Water heater body; 11. Condensing heat exchanger; 12. Burner; 13. Combustion chamber box; 14. Main heat exchanger; 20. Smoke exhaust pipe; 201. Smoke outlet; 202. Smoke exhaust passage; 30. Atomization assembly; 31. Atomization module; 311. Spray port; 312. Delivery flow channel; 313. External thread portion; 32. Connecting pipe; 33. Connecting piece; 40. Water collection assembly; 41. Water collection piece; 42. Condensate water pipe; 43. Drainage pump; 44. Drain pipe; 50. Water inlet pipe; 60. Bypass pipe; 61. Bypass valve; 70. Fan; 80. Water outlet pipe.

[0027] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In the context of energy conservation and emission reduction, improving the energy efficiency of gas water heaters has become a trend in the industry. Traditional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of vaporization of flue gas, but a large amount of condensed water will be generated during the process of utilizing the latent heat of vaporization of flue gas. In related technologies, some condensing gas water heaters use an atomization module to atomize the condensed water and discharge it along with the flue gas. During the discharge process, there may be problems such as a relatively complex atomized condensed water discharge structure and poor discharge efficiency.

[0032] The present utility model proposes a gas water heater.

[0033] Please refer to Figures 1 to 5 , in an embodiment of the present utility model, the gas water heater includes a condensing heat exchanger 11, an exhaust pipe 20, and an atomization assembly 30; the exhaust pipe 20 is communicated with the condensing heat exchanger 11, and the exhaust pipe 20 is provided with an exhaust port 201 for discharging flue gas; the atomization assembly 30 is communicated with the condensing heat exchanger 11, the atomization assembly 30 has a spray port 311 located in the exhaust pipe 20 and facing the exhaust port 201, and the atomization assembly 30 is used for atomizing the condensed water generated by the condensing heat exchanger 11 and spraying it out from the spray port 311.

[0034] In the present utility model, the gas water heater can be a forced-draft gas water heater or a forced-exhaust gas water heater. The following mainly takes the forced-draft gas water heater as an example. Among them, the gas water heater includes a water heater body 10, which is the main component for realizing combustion and heat exchange. The water heater body 10 may specifically include a burner 12 and a heat exchange component, as well as a combustion chamber box body 13 that connects the combustion component and the heat exchanger. The heat exchange component may include a main heat exchanger 14 and a condensation heat exchanger 11. The main heat exchanger 14 and the condensation heat exchanger 11 are arranged in sequence in the flue gas flow direction of the water heater body 10. A hot water flow path is provided inside the heat exchange component, and the hot water flow path flows from the condensation heat exchanger 11 to the main heat exchanger 14. During operation, driven by a blower 70, the high-temperature flue gas generated by the combustion of the burner 12 is transported to the main heat exchanger 14 through the flue inside the combustion chamber box body 13. The high-temperature flue gas exchanges heat with the main heat exchanger 14 to heat the water in the pipes inside the main heat exchanger 14 at a high temperature. The flue gas after heat exchange then passes through the condensation heat exchanger 11 to preheat the water in the condensation heat exchanger 11 at a low temperature. Finally, the flue gas is discharged through an exhaust pipe 20.

[0035] Among them, when the flue gas exchanges heat through the main heat exchanger 14, the temperature of the flue gas can be reduced to the dew point temperature. At this time, when the flue gas contacts the condensation heat exchanger 11 with a relatively low surface temperature, the water vapor in the flue gas will generate condensed water on the surface of the condensation heat exchanger 11. Therefore, a condensate pipe 42 can be connected to the water heater body 10 to divert the condensed water generated by the condensation heat exchanger 11 and transport it to an atomization component 30. The atomization component 30 atomizes the condensed water. Since the atomization component 30 is arranged in the exhaust pipe 20, when discharging the flue gas generated by the combustion of the gas water heater through the exhaust pipe 20, the atomized condensed water can be driven by the flue gas flow and discharged from the gas water heater together with the flue gas. Among them, the spray port 311 faces the exhaust port 201. It can be that the spray port 311 is inclined towards the exhaust port 201, or the spray port 311 faces the exhaust port 201 directly. When the spray port 311 faces the exhaust port 201 directly, the discharging direction of the atomized condensed water from the spray port 311 is arranged parallel to the flue gas flow direction towards the exhaust port 201. In this way, it is possible to discharge the condensed water without connecting an external drain pipe 44, which can improve the installation convenience of the gas water heater. And without connecting an external drain pipe 44 to the gas water heater, the overall appearance integrity of the gas water heater can be improved, making the overall appearance quality better, and thus making the whole machine more beautiful. Among them, the atomization component 30 can adopt methods such as ultrasonic atomization, jet atomization, and vibrating sieve hole atomization to achieve atomization.

[0036] The technical solution of the present utility model is to arrange the atomization component 30 inside the smoke exhaust pipe 20. The atomization component 30 atomizes the condensed water generated by the heat exchange of the condensation heat exchanger 11, and the spray port 311 of the atomization component 30 faces the smoke exhaust port 201. The atomized condensed water can be discharged towards the smoke exhaust port 201. In this way, only the condensed water needs to be atomized, and there is no need to set up an additional driving structure to transport the atomized condensed water into the smoke exhaust pipe 20. The atomized condensed water can be discharged from the smoke exhaust port 201 driven by the flow of the flue gas. The discharge flow direction of the atomized condensed water is the same as the flow direction of the flue gas, which can reduce the resistance when the atomized condensed water flows and make the discharge efficiency of the atomized condensed water higher.

[0037] Refer to Figure 1 、 Figure 5 As shown in the embodiments of the present utility model, the smoke exhaust pipe 20 has a smoke exhaust passage 202 that communicates the condensation heat exchanger 11 with the smoke exhaust port 201. The atomization component 30 includes an atomization module 31. The atomization module 31 is arranged inside the smoke exhaust passage 202, and the atomization module 31 is provided with the spray port 311.

[0038] With such an arrangement, when there is flue gas flowing towards the smoke exhaust port 201 in the smoke exhaust passage 202, since the spray port 311 faces the smoke exhaust port 201, when the atomization module 31 atomizes the condensed water, the formed atomized condensed water is directly discharged towards the smoke exhaust port 201, which is the same as the flow direction of the flue gas. The driving force of the flue gas flow can make the atomized condensed water flow more smoothly, and there is no need to set up an additional driving part to introduce the atomized condensed water into the smoke exhaust passage 202.

[0039] Refer to Figure 1 、 Figure 5 As shown in the embodiments of the present utility model, the gas water heater further includes a water collection component 40. The water collection component 40 connects the condensation heat exchanger 11 with the atomization component 30. The water collection component 40 is used to collect the condensed water generated by the heat exchange of the condensation heat exchanger 11 and to direct the condensed water to the atomization component 30.

[0040] In this way, the condensed water generated by the heat exchange of the condensation heat exchanger 11 can be centrally collected by the water collection component 40, so that the condensed water can accumulate to a certain amount and then be introduced into the atomization component 30 for atomization treatment. It can avoid the situation that the condensed water generated by the single heat exchange of the condensation heat exchanger 11 is too little to be introduced into the atomization component 30 for atomization treatment. At the same time, by setting the water collection component 40 to continuously collect the condensed water, the condensed water can be centrally purified before atomization treatment to remove or reduce the impurities in the condensed water. When the condensed water is atomized subsequently, it can prevent the impurities in the condensed water from clogging or corroding the atomization component 30, resulting in a reduction in the service life of the atomization component 30.

[0041] Refer to Figure 1 As shown, in the embodiment of the present utility model, the water collection assembly 40 includes a water collection member 41 and a condensate water pipe 42. The water collection member 41 is arranged below the condensate heat exchanger 11. The condensate water pipe 42 connects the condensate heat exchanger 11 and the water collection member 41, and the condensate water pipe 42 is used to introduce the condensate water generated by the condensate heat exchanger 11 into the water collection member 41.

[0042] In the above embodiment, the water collection member 41 can be set as a water collection box. The water collection box has an inner cavity for storing condensate water. The condensate water pipe 42 is used to connect the water collection box and the condensate heat exchanger 11. When the condensate heat exchanger 11 exchanges heat to generate condensate water, the condensate water can flow into the inner cavity through the condensate water pipe 42 for storage. Among them, an adsorbent or a purification member can be arranged in the inner cavity of the water collection box to adsorb or purify the condensate water to reduce the impurities inside the condensate water.

[0043] Moreover, since the water collection member 41 is arranged below the condensate heat exchanger 11, when the condensate water flows from the condensate heat exchanger 11 into the condensate water pipe 42, the condensate water can directly flow into the water collection member 41 along the condensate water pipe 42 under the action of its own gravity. Thus, the overall structure of the water collection assembly 40 can be made simpler, enabling the whole machine of the gas water heater to be made smaller and the cost to be lower.

[0044] Optionally, the condensate heat exchanger 11 includes a condensate heat exchange assembly for heat exchange and a housing for accommodating the condensate heat exchange assembly. A collection cavity is arranged inside the housing, and the collection cavity is used to collect the condensate water generated when the condensate heat exchange assembly exchanges heat.

[0045] In the above embodiment, the housing can be provided with a smoke inlet for the flue gas to flow in and a smoke outlet for the flue gas to flow out. The smoke inlet is communicated with the internal flue of the main heat exchanger 14, and the smoke outlet is communicated with the internal flue of the smoke exhaust pipe 20. The bottom wall of the housing can be provided with a downwardly inclined guide surface. A collection cavity is formed between the guide inclined surface and the inner wall of the housing. The smoke inlet is arranged near the upper end of the guide surface, and a drainage position connecting the collection cavity is arranged at the lower end of the guide surface. A circuitous and reciprocating flue gas flow path can be arranged inside the housing to make the flue gas flow along a specified path to exchange heat with the condensate heat exchange assembly. During heat exchange, the condensate water condensed on the surface of the condensate heat exchange assembly can drip onto the guide surface and flow downward along the guide surface, and flow into the condensate water pipe 42 from the drainage position arranged at the lower end surface of the guide inclined surface, and flow into the water collection member 41 through the condensate water pipe 42, so as to transfer the condensate water out of the water heater body 10 in time and prevent the condensate water from accumulating in the water heater body 10 and causing corrosion of the condensate heat exchanger 11.

[0046] In an embodiment of the present utility model, the water collection assembly 40 further includes a drainage pump 43 and a drainage pipe 44. The drainage pipe 44 connects the water collection member 41 and the atomization assembly 30. The drainage pump 43 is connected in series to the drainage pipe 44. The drainage pump 43 is used to pump the condensed water in the water collection member 41 to the atomization assembly 30 via the drainage pipe 44.

[0047] In the present utility model, since the smoke exhaust pipe 20 is arranged above the flue gas flow of the condensation heat exchanger 11, the atomization assembly 30 arranged in the smoke exhaust pipe 20 is also located above the condensation heat exchanger 11. And in the present utility model, the water collection member 41 is arranged below the condensation heat exchanger 11. Therefore, the atomization assembly 30 is arranged above the water collection member 41. For this reason, a drainage pump 43 needs to be set as a driving member to transport the water in the water collection member 41 to the atomization assembly 30, so that the atomization assembly 30 can atomize the condensed water and discharge it in time along with the flue gas.

[0048] In an embodiment of the present utility model, the drainage pump 43 is arranged below the water collection member 41, and the input end of the drainage pump 43 is connected to the drainage position at the lower end of the water collection member 41. With such a setting, all the water inside the water collection member 41 can be transported by the drainage pump 43 to the atomization assembly 30 for atomization treatment. This prevents the existence of water accumulation dead zones inside the water collection member 41, resulting in the inability to discharge some condensed water.

[0049] In the above embodiment, the water collection member 41 can be set as a water collection box. The inner cavity bottom wall of the water collection box can be set as a horizontal plane, and the drainage position can be set at any position at the bottom of the water collection box, as long as it can communicate with the inner cavity. Or the inner cavity bottom wall of the water collection box can be set as an inclined plane, and the drainage position can be set at the position at the lowest end of the inclined plane at the bottom of the water collection box. The water located in the water collection box can automatically flow to the drainage position under the action of its own gravity. In this way, the suction force of the drainage pump 43 can be reduced, and the overall power of the drainage pump 43 can be lowered.

[0050] Continue to refer to Figure 1 、 Figure 5 , optionally, the gas water heater further includes a water inlet pipe 50 and a bypass pipe 60. The water inlet pipe 50 is used for the gas water heater to intake water. The bypass pipe 60 connects the water inlet pipe 50 and the water collection member 41. The bypass pipe 60 is provided with a bypass valve 61, and the bypass valve 61 is used to control the on-off of the bypass pipe 60.

[0051] In the present utility model, the gas water heater further includes an outlet pipe 80. The inlet pipe 50 connects the tap water pipeline to the water inlet end of the water heater body 10, and is used to convey the normal temperature water from the tap water pipeline to the internal flow path of the condensation heat exchanger 11. The outlet pipe 80 is connected to the water outlet end of the water heater body 10, and is used to export the hot water after heat exchange by the main heat exchanger 14 for the daily hot water use requirements. A bypass pipe 60 is provided to connect the inlet pipe 50 and the water collecting member 41. The purpose is to mix the water from the tap water pipeline with the condensed water in the water collecting member 41 when introducing the water from the tap water pipeline into the water collecting member 41, dilute the condensed water, and increase the pH value of the mixed water, so as to weaken the acidity of the mixed condensed water. When the mixed condensed water is subsequently conveyed to the atomization assembly 30 for atomization, the influence of the condensed water on the service life of the atomization assembly 30 can be reduced.

[0052] Optionally, the bypass valve 61 is a one-way valve, and the bypass valve 61 is used to unidirectionally conduct the flow path from the inlet pipe 50 to the water collecting member 41. With such a setting, the water inside the water collecting member 41 can be prevented from flowing back into the inlet pipe 50, entering the gas water heater through the inlet pipe 50, polluting the heat exchange water flow in the gas water heater, and affecting the water outlet use effect of the water heater.

[0053] In addition, in other embodiments, the bypass pipe 60 can also be connected to a position near the upper end of the water collecting member 41, and a condensate pipe 42 is provided to extend into the water collecting member 41, so that the lower end of the condensate pipe 42 is located below the connection end of the bypass pipe 60 and the water collecting member 41. A water level detection element is provided inside the water collecting member 41, and the water level detection element is located between the lower end of the condensate pipe 42 and the connection end of the bypass pipe 60 and the water collecting member 41. When the water level detection element detects that the internal water level of the water collecting member 41 reaches the position where the water level detection element is located, the drain pump 43 works to convey the water to the atomization assembly 30, and the water inside the water collecting member 41 can be prevented from flowing back into the inlet pipe 50.

[0054] Refer to Figure 3 As shown, in the embodiment of the present utility model, a conveying flow path 312 is provided inside the atomization module 31. The conveying flow path 312 communicates with the spray port 311, and the extending direction of the conveying flow path 312 is parallel to the axial direction of the smoke exhaust pipe 20. In this way, the water flow direction inside the atomization module 31 can be the same as the smoke ejection direction of the atomization module 31. When conveying the condensed water to the atomization part of the atomization module 31 and ejecting the atomized condensed water from the spray port 311, the water flow direction is the same as the spray direction of the atomization module 31, and the ejection resistance of the atomized condensed water when ejected from the spray port 311 is smaller.

[0055] In an embodiment of the present utility model, the direction in which the atomized condensed water is ejected from the spray port 311 is parallel to the direction of the flue gas flow in the exhaust pipe 20. With such a setting, when the atomized condensed water is ejected from the spray port 311, the ejection direction of the atomized condensed water is consistent with the flow direction of the flue gas, and the atomized condensed water is more easily carried out by the flue gas. Therefore, when the flue gas drives the atomized condensed water to be discharged from the gas water heater, the maximum discharge speed can be achieved at the position of the exhaust port 201.

[0056] In an embodiment of the present utility model, the atomizing assembly 30 further includes a connecting pipe 32, and the connecting pipe 32 is used to connect the atomizing module 31 and the condensation heat exchanger 11, and the atomizing module 31 is arranged close to the inner wall of the exhaust pipe 20.

[0057] Among them, the connecting pipe 32 passes through the exhaust pipe 20 and is connected to the condensation heat exchanger 11, and can be connected to the end of the drain pipe 44 away from the drain pump 43, and is connected to the condensation heat exchanger 11 through the transfer of the drain pipe 44, the water collecting member 41, and the condensate pipe 42. In this way, when connecting the atomizing assembly 30 and the water collecting assembly 40, it is only necessary to connect the connecting pipe 32 and the drain pipe 44 of the water collecting assembly 40 outside the exhaust pipe 20, and the operation is more convenient, so as to facilitate the assembly between the atomizing assembly 30 and the water collecting assembly 40.

[0058] In addition, the atomizing module 31 is arranged close to the inner wall of the exhaust pipe 20, so that the length of the connecting pipe 32 inside the exhaust pipe 20 is short. When the flue gas flows towards the exhaust port 201 inside the exhaust pipe 20, the resistance of the connecting pipe 32 to the flue gas flow is small, thereby reducing the influence of the connecting pipe 32 on the exhaust flow rate of the flue gas.

[0059] Of course, in other embodiments, the atomizing module 31 can also be arranged at a position close to the axis of the exhaust passage 202. For this purpose, an accelerated drainage passage can be provided between the exhaust passage 202 and the water heater body 10 to increase the speed of the flue gas flowing into the exhaust passage 202, so as to reduce the influence of the connecting pipe 32 on the flue gas flow rate when the flue gas is discharged from the exhaust port 201.

[0060] In an embodiment of the present utility model, the atomizing module 31 is provided with an external thread portion 313 that is threadedly connected and matched with the connecting pipe 32;

[0061] And / or, the atomizing assembly 30 further includes a connecting member 33, and the atomizing module 31 is fixed to the inner wall of the exhaust pipe 20 through the connecting member 33.

[0062] In the above embodiments, the connecting member 33 may be arranged in an L shape. The vertical section of the connecting member 33 is fixedly connected to the inner wall of the smoke exhaust pipe 20, and the horizontal section of the connecting member 33 is fixedly connected to the atomizing module 31, and / or, the atomizing module 31 is threadedly connected to the connecting pipe 32 through the external thread portion 313. This can facilitate the connection between the atomizing module 31 and the connecting pipe 32, and the installation and fixation of the atomizing module 31 through the connecting pipe 32 and / or the connecting member 33.

[0063] In the present utility model, the gas water heater may further include a fastener for installing and fixing the smoke exhaust pipe 20 on the water heater body 10 to achieve the connection and fixation between the smoke exhaust pipe 20 and the water heater body 10. Alternatively, the gas water heater may further include a flow guiding member for communicating the flue of the water heater body 10 with the smoke exhaust passage 202 of the smoke exhaust pipe 20, which can be used to accelerate the flue gas in the flue of the water heater body 10 into the smoke exhaust passage 202 for discharge.

[0064] In an embodiment of the present utility model, the gas water heater further includes a blower 70. The water heater body 10 includes a burner 12, a combustion chamber box 13, a main heat exchanger 14, and the condensation heat exchanger 11 arranged in sequence from bottom to top. The blower 70 is arranged at the bottom of the burner 12, and the air outlet of the blower 70 is communicated with the burner 12. The smoke exhaust pipe 20 is arranged above the condensation heat exchanger 11, and the air inlet of the smoke exhaust pipe 20 is communicated with the condensation heat exchanger 11.

[0065] In this embodiment, the condensing gas water heater specifically relates to a forced draft type gas water heater. The blower 70, the burner 12, the combustion chamber box 13, the main heat exchanger 14, and the condensation heat exchanger 11 are arranged in sequence from bottom to top along the height direction of the water heater body 10. Among them, the air outlet of the blower 70 is communicated with the burner 12. By setting the blower 70, on the one hand, it can provide the secondary air required for combustion for the burner 12 to ensure more complete combustion; on the other hand, it can drive the high-temperature flue gas generated by the combustion of the burner 12 to flow upward. As Figure 5 shown, when the condensing gas water heater operates, under the drive of the blower 70, the high-temperature flue gas generated by the combustion of the burner 12 flows upward along the combustion chamber box 13 to the main heat exchanger 14, and the high-temperature flue gas exchanges heat with the main heat exchanger 14 to heat the water flow inside the main heat exchanger 14. The flue gas after heat exchange further flows upward to the condensation heat exchanger 11 to preheat the water flow inside the condensation heat exchanger 11, and then the flue gas is discharged from the smoke exhaust pipe 20.

[0066] When the flue gas flows into the condensation heat exchanger 11, since the temperature of the flue gas is lower than the dew point temperature when the flue gas flows here, the water vapor in the flue gas condenses at the condensation heat exchanger 11 to generate condensed water. The condensed water flows into the water collecting member 41 through the condensate pipe 42 and is output to the atomizing assembly 30 through the drainage pump 43. Since the atomizing assembly 30 is arranged in the smoke exhaust passage 202 and the atomizing assembly 30 outputs towards the smoke exhaust port 201, after the atomizing assembly 30 atomizes the condensed water, the atomized condensed water is discharged from the smoke exhaust port 201 along with the flue gas under the drive of the flue gas.

[0067] Among them, before the water collecting member 41 conveys the condensed water to the atomizing assembly 30, the water collecting member 41 is communicated with the water inlet pipe 50 of the gas water heater through the bypass pipe 60. Tap water can be input into the water collecting member 41 through the water inlet pipe 50 to dilute the condensed water in the water collecting member 41, so that the pH value of the mixed water inside the water collecting member 41 increases and the acidity of the mixed condensed water weakens. When the mixed condensed water is subsequently conveyed to the atomizing assembly 30 for atomization, the influence on the service life of the atomizing assembly 30 can be reduced.

[0068] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A gas water heater, characterized in that: include: Condensing heat exchanger; A smoke exhaust pipe is connected to the condensing heat exchanger, and the smoke exhaust pipe is provided with a smoke exhaust port for exhausting smoke; as well as An atomizing assembly is connected to the condensing heat exchanger, and has a spray port located in the smoke exhaust pipe and facing the smoke exhaust port. The atomizing assembly is used to atomize the condensed water generated by the condensing heat exchanger and spray it out from the spray port.

2. The gas water heater according to claim 1, characterized in that: The smoke exhaust pipe has a smoke exhaust passage connecting the condensing heat exchanger with the smoke exhaust port. The atomization assembly includes an atomization module, which is arranged in the smoke exhaust passage and is provided with the spray port.

3. The gas water heater according to claim 2, characterized in that: A delivery channel is provided in the atomization module, the delivery channel is connected to the spray port, and an extension direction of the delivery channel is arranged parallel to the axial direction of the smoke exhaust pipe.

4. The gas water heater according to claim 2, characterized in that: The direction in which the spray port sprays atomized condensed water is parallel to the direction in which smoke flows in the smoke exhaust channel.

5. The gas water heater according to claim 2, characterized in that: The atomization assembly further includes a connecting pipe, which is used to connect the atomization module with the condensing heat exchanger. The atomization module is arranged close to the inner wall of the smoke exhaust pipe.

6. The gas water heater according to claim 5, characterized in that: The atomization module is provided with an external threaded portion which is threadably connected to and matched with the connecting pipe; And / or, the atomization assembly further includes a connecting piece, and the atomization module is fixed to the inner wall of the smoke exhaust pipe via the connecting piece.

7. The gas water heater according to any one of claims 1 to 6, characterized in that: The gas water heater also includes a water collecting component, which connects the condensing heat exchanger with the atomizing component. The water collecting component is used to collect condensed water generated by heat exchange in the condensing heat exchanger and to guide the condensed water to the atomizing component.

8. The gas water heater according to claim 7, characterized in that: The water collecting component includes a water collecting part and a condensing water pipe. The water collecting part is arranged below the condensing heat exchanger. The condensing water pipe connects the condensing heat exchanger with the water collecting part. The condensing water pipe is used to introduce the condensed water generated by the condensing heat exchanger into the water collecting part.

9. The gas water heater according to claim 8, characterized in that: The water collection component also includes a drainage pump and a drainage pipe. The drainage pipe connects the water collection component and the atomization component. The drainage pump is connected in series to the drainage pipe. The drainage pump is used to pump the condensed water in the water collection component to the atomization component via the drainage pipe.

10. The gas water heater according to claim 8, characterized in that: The gas water heater also includes a water inlet pipe and a bypass pipe. The water inlet pipe is used to supply water to the gas water heater. The bypass pipe connects the water inlet pipe and the water collecting member. The bypass pipe is provided with a bypass valve, and the bypass valve is used to control the on-off of the bypass pipe.

Images