Gas water heating device

Abstract

The invention discloses a gas water heating device which comprises a combustion device, a first heat exchanger and a second heat exchanger which are sequentially arranged. The fan is used for driving high-temperature flue gas generated by the combustion device to sequentially flow through the first heat exchanger and the second heat exchanger; the atomization treatment device communicates with an inner cavity of the second heat exchanger, condensate water generated in the second heat exchanger can flow into the atomization treatment device, and the atomization treatment device is used for treating the condensate water to generate condensate water mist; the drainage channel is used for introducing flue gas before flowing into the second heat exchanger and / or flowing through part of the second heat exchanger into the atomization treatment device; the atomization treatment device is communicated with a smoke exhaust pipe of the gas water heating device, and condensate water mist can flow to the smoke exhaust pipe along with smoke in the atomization treatment device. According to the device, a condensate water discharge pipe can be omitted, and secondary condensation of condensate water mist in the discharge process can be prevented through heat of smoke.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a gas water heater. Background Art

[0002] Existing water heaters mainly include: gas water heaters, solar water heaters, air energy heat pump water heaters and electric water heaters, etc. Among them, gas water heaters are a typical instant water heater, which mainly includes components such as a fan, a burner, and a heat exchanger.

[0003] During the use of the gas water heater, the high-temperature flue gas generated by the burner exchanges heat with the heat exchanger once, forming medium-temperature flue gas with a relatively high temperature. In the prior art, in order to make full use of the heat energy in the medium-temperature flue gas, a condensing heat exchanger is added to perform a secondary heat exchange between the medium-temperature flue gas and the condensing heat exchanger before being discharged. However, after the medium-temperature flue gas exchanges heat with the condensing heat exchanger, the flue gas temperature can drop below 100°C, which is prone to produce condensed water.

[0004] For the gas water heater with condensing heat exchanger (hereinafter referred to as condensing gas water heater), it is usually necessary to set a condensate discharge pipe so that the condensate can be discharged into the sewer through the condensate discharge pipe. However, the installation of the condensate discharge pipe requires pre-buried pipes or reserved installation holes in advance, which makes the condensing gas water heater greatly affected by the installation environment factors, and the condensate discharge pipe is usually exposed to the external environment, affecting the appearance of the whole machine.

[0005] Therefore, it is necessary to provide a gas water heater to solve at least one of the above problems. Summary of the invention

[0006] In view of the defects existing in the prior art, a gas water heater is provided in an embodiment of the present invention, which can not only eliminate the condensed water discharge pipe, but also use the heat of the flue gas to prevent the secondary condensation of the condensed water mist during the discharge process.

[0007] The specific technical solution of the implementation mode of the present invention is: A gas water heater, comprising: a combustion device, a first heat exchanger, and a second heat exchanger arranged in sequence; a fan, wherein the fan is used to drive the high-temperature flue gas generated by the combustion device to flow through the first heat exchanger and the second heat exchanger in sequence; an atomization treatment device, wherein the atomization treatment device is connected to the inner cavity of the second heat exchanger, and the condensed water generated in the second heat exchanger can flow into the atomization treatment device, and the atomization treatment device is used to treat the condensed water to produce condensed water mist; a drainage channel, wherein the drainage channel is used to introduce the flue gas before flowing into the second heat exchanger and / or flowing through part of the second heat exchanger into the atomization treatment device; the atomization treatment device is connected to the smoke exhaust pipe of the gas water heater, and the condensed water mist can flow to the smoke exhaust pipe along with the flue gas introduced into the atomization treatment device.

[0008] In a preferred embodiment, the gas water heater further comprises a drainage component, and the drainage channel is formed in the drainage component.

[0009] In a preferred embodiment, the atomization treatment device comprises a shell, and a containing cavity is arranged in the shell, and the smoke entering the drainage component flows into the containing cavity through the drainage channel.

[0010] In a preferred embodiment, a condensate inlet and a smoke inlet are provided on the shell, and the condensate inlet is connected to the inner cavity of the second heat exchanger. The condensate generated in the second heat exchanger can flow into the accommodating cavity through the condensate inlet, and the smoke introduced by the drainage component can flow into the accommodating cavity through the smoke inlet.

[0011] In a preferred embodiment, the position of the condensed water inlet is lower than the position of the flue gas inlet in the height direction.

[0012] In a preferred embodiment, the atomization treatment device comprises an atomization module, and the atomization module is arranged at the lower part of the housing.

[0013] In a preferred embodiment, the atomization treatment device is provided with a water level monitoring module, the water level monitoring module is communicatively connected to the controller, and the controller is communicatively connected to the atomization treatment device; when the water level monitoring module detects that the level of condensed water flowing into the atomization treatment device is higher than a preset water level, the controller controls the atomization treatment device to turn on the atomization function.

[0014] In a preferred embodiment, along the height direction, the preset water level is lower than the position of the exhaust port of the drainage component.

[0015] In a preferred embodiment, the exhaust port of the guide component is connected to the smoke inlet or the guide component extends into the accommodating cavity through the smoke inlet and the exhaust port is located in the accommodating cavity.

[0016] In a preferred embodiment, the condensed water inlet is an inlet for the condensed water to flow into the accommodating cavity, or the condensed water inlet is an inlet for the condensed water conduit to extend into the accommodating cavity.

[0017] In a preferred embodiment, the gas water heater further comprises a condensed water treatment device, wherein the condensed water treatment device is used to treat the condensed water generated in the second heat exchanger and guide the treated condensed water to the atomization treatment device.

[0018] In a preferred embodiment, the condensate treatment device comprises a shell, in which a condensate treatment medium is arranged, and the condensate generated in the second heat exchanger flows into the atomization treatment device after being treated by the condensate treatment device.

[0019] In a preferred embodiment, the fan is arranged between the first heat exchanger and the second heat exchanger along the flue gas flow direction, the outlet of the fan is connected to the inner cavity of the second heat exchanger, and the flue gas flowing out of the fan outlet flows into the inner cavity of the second heat exchanger.

[0020] In a preferred embodiment, the drainage component includes a first tube body. When the gas water heater is in operation, part of the flue gas upstream of the second heat exchanger enters the first tube body. The flue gas entering the first tube body flows through the drainage channel and then flows into the accommodating cavity of the atomization treatment device.

[0021] In a preferred embodiment, the first tube body includes an air inlet and an exhaust port, the air inlet is connected to the flue gas channel upstream of the second heat exchanger, and the exhaust port is connected to the accommodating chamber of the atomization treatment device.

[0022] In a preferred embodiment, the air inlet is communicated with a channel downstream of the impeller of the fan, so as to guide part of the smoke flowing out of the impeller of the fan into the accommodating chamber of the atomization treatment device through the drainage channel.

[0023] In a preferred embodiment, the flow guiding component is at least partially disposed in the inner cavity of the second heat exchanger.

[0024] In a preferred embodiment, the exhaust port extends into the accommodating chamber of the atomization treatment device.

[0025] In a preferred embodiment, the gas water heater further comprises a guide channel, which is used to guide the condensed water mist generated in the atomization treatment device and the smoke introduced into the accommodating cavity of the atomization treatment device through the drainage channel out of the accommodating cavity and guide them to the smoke exhaust pipe.

[0026] In a preferred embodiment, the inlet of the outlet channel is communicated with the accommodating chamber of the atomization treatment device, and the outlet of the outlet channel extends to the smoke exhaust pipe.

[0027] In a preferred embodiment, the gas water heater further comprises a discharge component, the discharge channel is formed in the discharge component, and the discharge component at least partially passes through the inner cavity of the second heat exchanger.

[0028] In a preferred embodiment, the outlet component comprises a second tube body, and the outlet channel is provided in the second tube body.

[0029] In a preferred embodiment, the atomization module is an ultrasonic generator.

[0030] In a preferred embodiment, an opening and closing component that opens or closes with the smoke is provided in the smoke exhaust pipe, and the outlet of the outlet channel is located upstream of the opening and closing component.

[0031] The technical solution of the present invention has the following significant beneficial effects: The gas water heater provided in the embodiment of the present application is specifically a condensing gas water heater, which enables the condensed water generated in the second heat exchanger to flow into the atomizing treatment device by providing an atomizing treatment device and a drainage channel connected to the inner cavity of the second heat exchanger. When the gas water heater is in operation, the drainage channel is used to introduce the flue gas before flowing into the second heat exchanger and / or flowing through part of the second heat exchanger into the atomizing treatment device; the condensed water mist generated after being treated by the atomizing treatment device is introduced into the flue gas in the atomizing treatment device through the drainage channel toward the exhaust pipe, thereby enabling the condensing gas water heater to achieve condensed water-free discharge, and thus the condensed water discharge pipe can be eliminated, thereby improving the aesthetics of the entire machine and solving the problem that the installation of the condensing gas water heater is limited due to the lack of pre-buried pipes or reserved installation holes.

[0032] Among them, for some special working conditions, such as when the external ambient temperature is low, and / or, affected by factors such as the long pipe of the smoke exhaust pipe, the condensed water mist in the flue gas is prone to secondary condensation. In the embodiment of the present application, since the target flue gas introduced by the drainage channel is a medium-temperature flue gas with a higher temperature (referred to as the target flue gas), this part of the flue gas has not yet exchanged heat with the heat exchange component in the second heat exchanger or has not fully exchanged heat with the heat exchange component in the second heat exchanger. Therefore, when the target flue gas flows into the atomization treatment device through the drainage channel and drives the condensed water mist generated in the atomization treatment device to the smoke exhaust pipe, even if the length of the smoke exhaust pipe is long and / or the external ambient temperature is low, since the target flue gas temperature is relatively high, when it flows through the smoke exhaust pipe, even if a certain temperature drop occurs, the condensed water mist carried by the target flue gas is not easy to condense again, thereby overcoming the various problems that may arise after the secondary condensation of the above-mentioned condensed water mist, such as dripping at the outlet of the smoke exhaust pipe.

[0033] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0035] Figure 1 This is a schematic structural diagram of a gas water heater provided in an embodiment of the present application; Figure 2 This is a schematic diagram of the structure of another gas water heater provided in an embodiment of the present application.

[0036] Reference numerals of the present application: 2. The first heat exchanger; 3. Second heat exchanger; 30. Condensation shell; 301. Flue gas inlet; 302. Flue gas outlet; 31. Heat exchange component; 4. Fan; 5. Atomization treatment device; 50. Shell; 51. Condensate inlet; 52. Flue gas inlet; 54. Atomization module; 55. Water level monitoring module; 6. drainage channel; 60. first tube body; 601. air inlet; 602. exhaust port; 8. Condensate treatment device; 81. Casing; 9. outlet channel; 90. second tube body. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0038] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] The present invention provides a gas water heater, which can not only eliminate the condensed water discharge pipe, but also utilize the heat of flue gas to prevent secondary condensation of condensed water mist during the discharge process while ensuring thermal efficiency.

[0041] See also Figure 1 or Figure 2In the embodiment of the present application specification, a gas water heater is provided, which may include: a combustion device, a first heat exchanger 2, and a second heat exchanger 3 arranged in sequence; a fan 4, wherein the fan 4 is used to drive the high-temperature flue gas generated by the combustion device to flow through the first heat exchanger 2 and the second heat exchanger 3 in sequence; an atomization treatment device 5, wherein the atomization treatment device 5 is connected to the inner cavity of the second heat exchanger 3, and the condensed water generated in the second heat exchanger 3 can flow into the atomization treatment device 5, and the atomization treatment device 5 is used to treat the condensed water to produce condensed water mist; a drainage channel 6, wherein the drainage channel 6 is used to introduce the flue gas before flowing into the second heat exchanger 3 and / or flowing through part of the second heat exchanger 3 into the atomization treatment device 5; the atomization treatment device 5 is connected to the exhaust pipe of the gas water heater, and the condensed water mist can flow to the exhaust pipe along with the flue gas introduced into the atomization treatment device 5.

[0042] The gas water heater provided in the embodiment of the present application is specifically a condensing gas water heater, which can ensure that the heat in the flue gas is fully absorbed by the fluid in the first heat exchanger 2 and the second heat exchanger 3 by sequentially arranging the first heat exchanger 2 and the second heat exchanger 3 along the flow direction of the flue gas, thereby ensuring that the gas water heater has high energy efficiency, and at the same time can also ensure that the exhaust flue gas has a lower temperature, thereby achieving the purpose of energy saving and environmental protection.

[0043] The gas water heater provided in the embodiment of the present application is specifically a condensing gas water heater, which is provided with an atomizing treatment device 5 and a drainage channel 6 connected to the inner cavity of the second heat exchanger 3, so that the condensed water generated in the second heat exchanger 3 can flow into the atomizing treatment device 5. When the gas water heater is in operation, the drainage channel 6 is used to introduce the flue gas before flowing into the second heat exchanger 3 and / or flowing through part of the second heat exchanger 3 into the atomizing treatment device 5; the condensed water mist generated after being treated by the atomizing treatment device is introduced into the flue gas in the atomizing treatment device 5 along the drainage channel 6 and flows into the exhaust pipe, so that the condensing gas water heater can achieve condensed water-free discharge, and the condensed water discharge pipe can be eliminated, thereby improving the aesthetics of the whole machine and solving the problem that the installation of the condensing gas water heater is limited due to the lack of pre-buried pipes or reserved installation holes.

[0044] Among them, for some special working conditions, such as when the external ambient temperature is low, and / or affected by factors such as the long smoke exhaust pipe, the condensed water mist in the flue gas is prone to secondary condensation. In the embodiment of the present application, since the target flue gas introduced by the drainage channel 6 is medium-temperature flue gas with a higher temperature, this part of the flue gas has not yet exchanged heat with the heat exchange component 31 in the second heat exchanger 3 or has not fully exchanged heat with the heat exchange component 31 in the second heat exchanger 3. Therefore, when the target flue gas with a higher temperature flows into the atomization treatment device 5 through the drainage channel 6, and drives the condensed water mist generated in the atomization treatment device 5 to the smoke exhaust pipe, even if the length of the smoke exhaust pipe is long and / or the external ambient temperature is low, since the target flue gas temperature is relatively high, when it undergoes a certain degree of cooling in the process of flowing through the smoke exhaust pipe, the condensed water mist carried by the target flue gas is not easy to undergo secondary condensation, thereby overcoming the various problems that may arise after the secondary condensation of the condensed water mist mentioned above.

[0045] The present application will be described in detail below with reference to specific drawings and implementation methods.

[0046] In this embodiment, the gas water heater may mainly include: a combustion device, a first heat exchanger 2, a second heat exchanger 3, a fan 4, an atomization treatment device 5 and a drainage channel 6, etc.

[0047] The heat generated by the combustion of the gas by the combustion device is used to heat the fluid flowing through the first heat exchanger 2 and the second heat exchanger 3. Specifically, the combustion device can be in the form of a burner with adjustable power.

[0048] The fan 4 is used to provide a driving force for the airflow. Specifically, the fan 4 is used to drive the high-temperature flue gas generated by the combustion device to flow through the first heat exchanger 2 and the second heat exchanger 3 in sequence. Among them, the structure, form and setting position of the fan 4 itself can vary according to different actual usage scenarios, and the present application does not make specific limitations here. For example, along the height direction from top to bottom, the fan 4, the first heat exchanger 2 and the burner can be arranged in sequence. In addition, the fan 4 can specifically be in the form of a variable frequency fan. The rotation speed of the fan 4 can be adaptively changed with changes in conditions such as combustion load.

[0049] The first heat exchanger 2 and the second heat exchanger 3 are used to circulate water to be heated. Generally, the fluid can be water, but it is not excluded that it can also be a mixture of water and steam, or in the form of other fluids. In the following embodiments, the fluid is described by taking water as an example, and other fluid forms can be referred to by analogy, and this application will not repeat them here. The water flowing into the gas water heater from the outside can first flow through the condensing heat exchanger for preheating, and then enter the main heat exchanger for substantial temperature increase.

[0050] The first heat exchanger 2 and the second heat exchanger 3 are sequentially arranged along the flow direction of the flue gas. The first heat exchanger 2 may be a heat exchanger relatively closer to the flue gas generating source (combustion device), and serves as the main heat exchanger of the gas water heater. The specific form of the first heat exchanger 2 may be a finned heat exchanger or a tubular heat exchanger. Of course, the shape, structure, etc. of the first heat exchanger 2 may vary according to different actual use scenarios, and this application does not make any specific limitation here.

[0051] The second heat exchanger 3 can be arranged downstream of the first heat exchanger 2 along the flue gas flow direction, and the second heat exchanger 3 can be a condensing heat exchanger. The high-temperature flue gas generated by the combustion device can be heat-exchanged with the first heat exchanger 2 to obtain medium-temperature flue gas, and the medium-temperature flue gas can flow through the second heat exchanger 3 and continue to exchange heat with the second heat exchanger 3, so that the heat in the medium-temperature flue gas is absorbed by the water in the second heat exchanger 3, and the temperature of the flue gas is further reduced.

[0052] The second heat exchanger 3 may include a hollow condensation shell 30 for circulating flue gas, wherein an inner cavity is formed in the condensation shell 30, and a heat exchange component 31 for circulating water may be arranged in the inner cavity. A flue gas inlet 301 and a flue gas outlet 302 are arranged on the condensation shell 30. When the flue gas enters the inner cavity through the flue gas inlet 301 and exchanges heat with the water in the heat exchange component 31 of the second heat exchanger 3, the water vapor in the flue gas will condense on the surface of the heat exchange component 31 to form liquid condensed water. The condensed water will flow toward the bottom of the inner cavity of the second heat exchanger 3 under the action of gravity.

[0053] The atomizing device 5 is a device that can convert liquid or gas into tiny droplets. The atomizing device 5 is connected to the inner cavity of the second heat exchanger 3, and the condensed water generated in the second heat exchanger 3 can flow into the atomizing device 5. The condensed water flowing into the atomizing device 5 can be atomized by the atomizing device 5 to form water mist. The water mist needs to be discharged outward from the gas water heater under the driving action of the fluid. Among them, the fluid providing the driving force can specifically be the flue gas generated by the combustion of the combustion device and driven by the fan 4. Of course, in the embodiment of the present application, it is not ruled out that the fluid providing the driving force is in other forms. For example, a fluid driving device can be set inside the atomizing device 5, or a combination of multiple driving forms. In the embodiment of the present application, the above-mentioned flue gas providing the driving force is mainly used as an example for illustration.

[0054] The atomizing treatment device 5 is connected to the smoke exhaust pipe of the gas water heater. The condensed water mist generated after being treated by the atomizing treatment device 5 flows into the smoke exhaust pipe along with the flue gas generated by the combustion device and is discharged outwardly, thereby enabling the condensing gas water heater to achieve condensed water-free discharge, and thus the condensed water discharge pipe can be eliminated, thereby improving the aesthetics of the entire machine and solving the problem of limited installation of the condensing gas water heater due to the lack of pre-buried pipes or reserved installation holes.

[0055] For the above-mentioned condensing gas water heater, the condensed water is atomized and then discharged with the flue gas, which can basically achieve the purpose of no condensed water discharge. However, in some specific scenarios, it will face further technical problems.

[0056] For example, when the high-temperature flue gas passes through the first heat exchanger 2 and the second heat exchanger 3 and then flows through the atomization treatment device 5, its temperature is usually relatively low. At this time, the flue gas with a relatively low temperature will contact the exhaust pipe when carrying the condensed water mist to be discharged outward. When the external ambient temperature is relatively low and / or, affected by factors such as the long exhaust pipe, the condensed water mist in the flue gas is prone to secondary condensation.

[0057] The condensed water after secondary condensation will accumulate in the exhaust pipe and flow under the action of gravity. Depending on the installation direction of the exhaust pipe, the condensed water after secondary condensation will flow to different locations. For example, when the exhaust pipe is slightly tilted from the inside to the outside, the condensed water after secondary condensation will drip outward, affecting the user experience.

[0058] In this embodiment, the gas water heater is provided with a drainage channel 6, which is used to introduce the target flue gas into the atomization treatment device 5. The target flue gas introduced into the atomization treatment device 5 by the drainage channel 6 has a relatively high temperature. The target flue gas may include the flue gas before flowing into the second heat exchanger 3 and / or the flue gas flowing through part of the second heat exchanger 3. Specifically, the target flue gas may include any one or a combination of the following: medium-temperature flue gas with a relatively high temperature after heat exchange with the first heat exchanger 2, and flue gas with a relatively high temperature that has not been completely heat exchanged with the heat exchange component 31 in the second heat exchanger 3. When the target flue gas with a higher temperature flows into the atomization treatment device 5 through the drainage channel 6, and drives the condensed water mist generated in the atomization treatment device 5 to the smoke exhaust pipe, even if the length of the smoke exhaust pipe is long and / or the external ambient temperature is low, since the target flue gas temperature is relatively high, when it undergoes a certain degree of cooling in the process of flowing through the smoke exhaust pipe, the condensed water mist carried by the target flue gas is not prone to secondary condensation, thereby overcoming the various problems that may arise after the secondary condensation of the condensed water mist mentioned above.

[0059] In one embodiment, the gas water heater may further include a drainage component, and the drainage channel 6 is formed in the drainage component.

[0060] In this embodiment, the drainage channel 6 may be in various forms. For example, the drainage channel 6 may be formed in an independent drainage component. The drainage component may be located inside the condensation shell 30, outside the condensation shell 30, or partially inside the condensation shell 30 and partially outside the condensation shell 30. Alternatively, the drainage channel 6 may be formed in the condensation shell 30 of the second heat exchanger 3, that is, the drainage channel 6 is formed by setting a structure on the condensation shell 30. Alternatively, the drainage channel 6 may be independently formed or formed in combination in other forms. In this embodiment, the drainage channel 6 is mainly explained as being formed in the drainage component.

[0061] When the drainage channel 6 is formed in the drainage component, in addition to being used to guide the target flue gas into the atomization treatment device 5, the temperature of the introduced flue gas can be accurately controlled by cleverly setting the inlet position of the drainage component. Specifically, the inlet of the drainage component can be set at a position where the flue gas temperature is higher, so as to guide the target flue gas into the atomization treatment device 5, and the outlet of the drainage component can be connected to the atomization treatment device 5, so as to efficiently guide the target flue gas into the atomization treatment device 5. When in use, the condensed water mist generated after being treated by the atomization treatment device 5 can flow to the exhaust pipe along with the flue gas introduced into the atomization treatment device 5 by the drainage component.

[0062] In one embodiment, the fan 4 is arranged between the first heat exchanger 2 and the second heat exchanger 3 along the flue gas flow direction, the outlet of the fan 4 is connected to the inner cavity of the second heat exchanger 3, and the flue gas flowing out of the outlet of the fan 4 flows into the inner cavity of the second heat exchanger 3.

[0063] In this embodiment, along the direction of flue gas flow, the fan 4 can be located between the first heat exchanger 2 and the second heat exchanger 3. The fan 4 has a relative inlet and outlet. When the fan 4 is started, a negative pressure can be generated at the inlet of the fan 4. The high-temperature flue gas generated by the combustion device will first flow through the first heat exchanger 2, and after heat exchange with the first heat exchanger 2, a medium-temperature flue gas after a heat exchange is formed. This part of the medium-temperature flue gas enters the fan 4 through the inlet of the fan 4, and flows into the inner cavity of the second heat exchanger 3 through the outlet of the fan 4, and performs a secondary heat exchange with the heat exchange component 31 of the second heat exchanger 3.

[0064] In a specific embodiment, the drainage component may include a first tube body 60. When the gas water heater is in operation, part of the flue gas upstream of the second heat exchanger 3 enters the first tube body 60. The flue gas entering the first tube body 60 flows through the drainage channel 6 and then flows into the accommodating cavity of the atomization treatment device 5.

[0065] In this embodiment, the specific form of the flow guide component is a hollow tube. For example, the flow guide component may include a first tube 60, and the first tube 60 may include at least one hollow pipe. The first tube 60 may be made of a high temperature resistant material, so that it can be used to circulate flue gas with a high temperature. In addition, the first tube 60 may be a flexible tube, which has better adaptability during installation and can be installed without interference in a limited space. When the gas water heater is in operation, the high-temperature flue gas generated by the combustion device first flows through the first heat exchanger 2 under the action of the fan 4, then enters the fan 4 through the inlet of the fan 4, and then flows into the inner cavity of the second heat exchanger 3 and the first tube 60 through the outlet of the fan 4. The flue gas entering the first tube 60 is the flue gas upstream of the second heat exchanger 3, which has not yet exchanged heat with the second heat exchanger 3 and has a relatively high temperature. This part of the flue gas with relatively high temperature passes through the drainage channel 6 formed inside the first tube body 60 and flows into the accommodating cavity of the atomization treatment device 5, so that the condensed water mist generated in the atomization treatment device 5 can be guided to the smoke exhaust pipe at a higher temperature, and secondary condensation is not likely to occur.

[0066] The first tube body 60 may include an air inlet 601 and an air outlet 602 , wherein the air inlet 601 is connected to the flue gas channel upstream of the second heat exchanger 3 , and the air outlet 602 is connected to the accommodating cavity of the atomization treatment device 5 .

[0067] The first tube body 60 may include an air inlet 601 and an air outlet 602. The air inlet 601 may be connected to the flue gas channel upstream of the second heat exchanger 3, and is used to introduce the flue gas upstream of the second heat exchanger 3 into the first tube body 60. Specifically, the condensation shell 30 of the second heat exchanger 3 may be directly connected to the outlet of the fan 4 or indirectly connected through a pipeline. Specifically, the air inlet 601 is connected to the channel downstream of the impeller of the fan 4, so as to introduce part of the flue gas flowing out of the impeller of the fan 4 into the accommodating cavity of the atomization treatment device 5 through the drainage channel 6.

[0068] In which, taking the drainage channel 6 as the first tube body 60 as an example, the air inlet 601 of the first tube body 60 can be fixed at the smoke inlet 301 of the condensing shell 30; or, the air inlet 601 of the first tube body 60 can be fixed at the outlet of the fan 4, or the air inlet 601 of the first tube body 60 can be fixed between the outlet of the fan 4 and the smoke inlet 301 of the condensing shell 30, or the air inlet 601 can be fixed in the inner cavity of the second heat exchanger 3, etc. When the air inlet 601 is fixed in the inner cavity of the second heat exchanger 3, the air inlet 601 is located upstream of the smoke outlet 302, has a certain distance from the smoke outlet 302, and is spaced apart from the heat exchange component 31 in the second heat exchanger 3, so as to ensure that the smoke introduced by the air inlet 601 is a relatively high temperature smoke, which has not yet exchanged heat with the heat exchange component 31 or has completely exchanged heat with it.

[0069] Taking the first tube body 60 fixed at the flue gas inlet 301 of the condensing shell 30 as an example, the flow cross-section of the first tube body 60 is smaller than the flow cross-section of the flue gas inlet 301. Specifically, the ratio of the flow cross-sectional area of ​​the air inlet 601 of the first tube body 60 to the flue gas inlet 301 is between 5% and 15%. Since the flue gas flowing in from the flue gas inlet 301 is basically the medium-temperature flue gas after heat exchange with the first heat exchanger 2, in order to make full use of the latent heat in the medium-temperature flue gas, this part of the medium-temperature flue gas needs to be further heat exchanged with the heat exchange component 31 in the secondary heat exchanger, thereby improving the thermal efficiency of the gas water heater. The inventor of the present application has verified that when the ratio of the flow cross-sectional area of ​​the air inlet 601 of the first tube body 60 to the flue gas inlet 301 is within 15%, when a small part of the medium-temperature flue gas is diverted from the flue gas inlet 301 to the first tube body 60, the thermal efficiency of the gas water heater is less affected and can be almost ignored. That is, when the ratio of the flow cross-sectional area of ​​the air inlet 601 of the first tube body 60 to the flow cross-sectional area of ​​the flue gas inlet 301 is controlled within the above-mentioned reasonable range, the gas water heater can maintain a high thermal efficiency. In addition, the medium-temperature flue gas diverted from the first tube body 60 can be used to realize the discharge of condensed water mist in the atomization treatment device 5.

[0070] In order to ensure that there is enough medium-temperature flue gas introduced into the accommodating cavity of the atomizing treatment device 5 through the first tube body 60, so as to realize the external discharge of the condensed water mist in the atomizing treatment device 5, the ratio of the flow cross-sectional area of ​​the air inlet 601 of the first tube body 60 to the flow cross-sectional area of ​​the flue gas inlet 301 needs to be above 5%. Of course, in order to ensure that the flue gas can maintain a high pressure and flow rate when flowing through the first tube body 60, the overall flow cross-sectional area of ​​the first tube body 60 should not be too large. Taking the first tube body 60 as a tube body with a uniform cross-section as an example, the ratio of the flow cross-sectional area of ​​the first tube body 60 to the flow cross-sectional area of ​​the flue gas inlet 301 is between 5% and 15%.

[0071] In this embodiment, part of the medium-temperature flue gas with higher wind pressure in the channel downstream of the impeller of the fan 4 can be guided into the accommodating chamber of the atomizing treatment device 5 through the first tube body 60 with a smaller flow cross-section, that is, flue gas with higher temperature and higher pressure (flow rate) can be introduced into the accommodating chamber of the atomizing treatment device 5, so that the condensed water mist generated in the atomizing treatment device 5 can be guided to the exhaust pipe at a higher temperature, and secondary condensation is not likely to occur. At the same time, the condensed water mist can be discharged at a higher flow rate.

[0072] In this embodiment, the exhaust port 602 of the first tube body 60 can be connected to the accommodating chamber of the atomizing treatment device 5, so as to introduce the flue gas with higher temperature and pressure into the accommodating chamber of the atomizing treatment device 5. The atomizing treatment device 5 includes a housing 50, and the housing 50 is provided with an accommodating chamber.

[0073] The housing 50 is provided with an opening for mounting the first tube 60. Specifically, the exhaust port 602 may be fixed at the opening, or the exhaust port 602 may extend into the accommodating chamber of the atomizing treatment device 5. When the exhaust port 602 extends into the accommodating chamber of the atomizing treatment device 5, the opening direction of the exhaust port 602 may be flexibly controlled so that the opening direction of the exhaust port 602 is arranged in a direction that is conducive to displacing the condensed water mist.

[0074] In one embodiment, the guide component is at least partially disposed in the inner cavity of the second heat exchanger 3 .

[0075] In this embodiment, the drainage component may be in the form of a hollow pipe, such as Figure 1 As shown, the hollow pipe can be partially arranged in the inner cavity of the second heat exchanger 3, or as shown in Figure 2 As shown, the hollow pipe can be completely passed through the inner cavity of the second heat exchanger 3. Since the inner cavity of the second heat exchanger 3 introduces the flue gas with a higher temperature after a heat exchange, the inner cavity of the second heat exchanger 3 is equivalent to a heat preservation cavity. When the guide component is at least partially passed through the inner cavity of the second heat exchanger 3, the heat preservation effect of the inner cavity can be used to keep the flue gas in the guide component warm, ensuring that the temperature of the flue gas will not drop significantly after flowing through the guide component, thereby being able to more reliably ensure that the flue gas with a higher temperature is guided to the accommodating cavity of the atomization treatment device 5, and then the condensed water mist generated in the atomization treatment device 5 can be efficiently guided to the exhaust pipe at a higher temperature for external discharge, and secondary condensation is not easy to occur.

[0076] In one embodiment, the atomization treatment device 5 may include a housing 50 , and a receiving chamber is provided in the housing 50 . The smoke entering the drainage component flows into the receiving chamber through the drainage channel 6 .

[0077] In this embodiment, the atomizing device 5 may include a housing 50, and the housing 50 may be specifically arranged on one side of the condensing housing 30 of the first heat exchanger 2. The housing 50 of the atomizing device 5 may be fixedly connected to the condensing housing 30, or the housing 50 of the atomizing device 5 may partially share a housing wall with the condensing housing 30. The specific structure, setting position and setting method of the housing 50 of the atomizing device 5 may be adaptively adjusted according to the actual spatial arrangement of the components inside the gas water heater, the position of the smoke exhaust pipe, etc., and specifically, the present application does not make the sole limitation here.

[0078] The shell 50 is a hollow structure, and a receiving cavity is formed inside the shell, and the receiving cavity can be used to receive the condensed water generated in the second heat exchanger 3. In addition, the atomization treatment device 5 may include an atomization module 54, and the atomization module 54 is arranged at the lower part of the shell 50, and the atomization module 54 is used to atomize the condensed water accumulated at the lower part of the shell 50 to form condensed water mist, so that when the flue gas is introduced into the receiving cavity through the drainage component, the condensed water mist can be introduced into the flue gas in the atomization treatment device 5 along the drainage channel 6 and flow to the exhaust pipe.

[0079] The specific form of the atomization module 54 can be an ultrasonic generator. The ultrasonic generator uses ultrasonic oscillation sound energy to make the particles on the surface of the condensed water fall off and become fine aerosol. The high-frequency current generated by the ultrasonic generator is converted into sound waves of the same frequency through the ultrasonic transducer, and directly acts on the condensed water through the ultrasonic film at the bottom of the atomization cylinder. When the ultrasonic energy reaches a certain value, the condensed water mist particles will overcome the surface tension and fly out, and then the mist particles will be sent out by the flue gas.

[0080] The output mist volume of the ultrasonic generator is large, and the droplets are small and uniform, which can better meet the needs of condensed water atomization. The condensed water can be efficiently atomized and can also be reliably led out by the flue gas. In addition, the size of the aerosol volume of the ultrasonic generator can be adjusted, and the aerosol volume can be adjusted according to the actual working conditions to ensure that the imported flue gas is compatible with the aerosol generated by the ultrasonic generator, and to ensure that the aerosol generated by the ultrasonic generator can be efficiently sent out by the imported flue gas.

[0081] Of course, in the embodiment of the present application, it is not excluded that the atomization module 54 is set in other forms, for example, a jet atomizer or a vibrating mesh atomizer, etc.

[0082] In one embodiment, the atomization treatment device 5 is provided with a water level monitoring module 55, and the water level monitoring module 55 is communicatively connected to the controller, and the controller is communicatively connected to the atomization treatment device 5; when the water level monitoring module 55 detects that the level of condensed water flowing into the atomization treatment device 5 is higher than a preset water level, the controller controls the atomization treatment device 5 to turn on the atomization function.

[0083] In this embodiment, a water level monitoring module 55 may be provided on or inside the shell 50 , and the water level monitoring module 55 is used to obtain the water level of condensed water inside the shell 50 .

[0084] By setting the water level monitoring module 55, the water level of the condensed water in the current shell 50 can be accurately obtained, and the water level is too low to prevent the atomization module 54 from drying out. In addition, the atomization module 54 is provided with an atomization sheet. By setting the water level monitoring module 55, the atomization sheet can be immersed in the condensed water before starting to work, which can prevent the atomization sheet from contacting the higher temperature flue gas introduced into the shell 50, thereby ensuring the reliability of the atomization sheet and extending its service life. In addition, for the atomization sheet, when it is working, it usually has a better working liquid level range, within which the atomization sheet can achieve an ideal atomization efficiency. By setting the water level monitoring module 55, the current condensed water level can be accurately identified, so that the atomization sheet can work within a better working liquid level range, thereby achieving an ideal atomization effect.

[0085] The water level monitoring module 55 can be connected to the controller of the gas water heater in communication, and the controller itself can be connected to the atomization treatment device 5 in communication, and the working state of the atomization treatment device 5 can be switched based on the condensed water level in the current shell 50 obtained by the water level monitoring module 55. For example, when the water level monitoring module 55 detects that the condensed water level in the current shell 50 reaches a preset water level, the gas water heater is in operation at this time, and the controller can control the atomization treatment device 5 to start the atomization function, atomize the condensed water, and at the same time use the flue gas introduced into the accommodating cavity of the shell 50 to send the atomized condensed water mist out of the gas water heater through the exhaust pipe.

[0086] In one embodiment, a condensate inlet 51 and a smoke inlet 52 are provided on the shell 50. The condensate inlet 51 is connected to the inner cavity of the second heat exchanger 3. The condensate generated in the second heat exchanger 3 can flow into the accommodating cavity through the condensate inlet 51, and the smoke introduced by the drainage component can flow into the accommodating cavity through the smoke inlet 52.

[0087] In this embodiment, the housing 50 of the atomization treatment device 5 may be provided with a condensed water inlet 51 and a smoke inlet 52, wherein the condensed water inlet 51 is connected to the inner cavity of the second heat exchanger 3, so that the condensed water generated in the second heat exchanger 3 can flow into the accommodating cavity of the housing 50 of the atomization treatment device 5 through the condensed water inlet 51. The condensed water inlet 51 is an inlet for the condensed water to flow into the accommodating cavity or the condensed water inlet 51 is an inlet for the condensed water to flow into the accommodating cavity.

[0088] The smoke inlet 52 is connected to the guide component, and the smoke introduced by the guide component can flow into the accommodating cavity through the smoke inlet 52. The exhaust port 602 of the guide component is connected to the smoke inlet 52 or the guide component extends into the accommodating cavity through the smoke inlet 52 and the exhaust port 602 is located in the accommodating cavity.

[0089] Specifically, taking the condensed water inlet 51 as the inlet for the condensed water to flow into the accommodating cavity, and the exhaust port 602 of the drainage component being connected to the smoke inlet 52 as an example, the position of the condensed water inlet 51 is lower than the position of the smoke inlet 52 in the height direction. In addition, when the position of the condensed water inlet 51 is set relatively low, the condensed water flowing in from the condensed water inlet 51 can be efficiently converged to the bottom of the shell 50 in a shorter path. When the position of the smoke inlet 52 is set relatively high, the high-temperature smoke flowing in from the smoke inlet 52 can be prevented from contacting the condensed water, ensuring that the smoke can reliably and directly act on the atomized condensed water mist.

[0090] In a specific embodiment, along the height direction, the preset water level is lower than the position of the exhaust port 602 of the guide component.

[0091] In the embodiment, since the atomization processing device 5 will start the atomization function when the water level in the accommodating chamber of the shell 50 reaches the preset water level, the water level in the shell 50 generally does not exceed the preset water level. When the position of the exhaust port 602 of the drainage component is higher than the position of the preset water level, it can be ensured that the introduced flue gas with a higher temperature smoothly discharges the condensed water mist through the exhaust pipe, so that when the position of the exhaust port 602 is below the preset water level, it can be avoided that the flue gas with a higher temperature flowing in from the flue gas inlet 52 directly contacts the condensed water, that is, the exhaust port 602 is blocked by the condensed water to form a water seal, resulting in the inability to introduce flue gas with a draft function into the shell 50.

[0092] In one embodiment, the gas water heater may further include a condensed water treatment device 8 , which is used to treat the condensed water generated in the second heat exchanger 3 and guide the treated condensed water to the atomization treatment device 5 .

[0093] In this embodiment, the gas water heater may also be provided with a condensate treatment device 8. In the flow path of the condensate, the condensate treatment device 8 is arranged between the second heat exchanger 3 and the atomization treatment device 5. The condensate generated in the second heat exchanger 3 can first flow into the condensate treatment device 8. After being treated by the condensate treatment device 8, the treated condensate is guided to the atomization treatment device 5.

[0094] Furthermore, the condensate treatment device 8 includes a shell 81 , in which a condensate treatment medium is arranged. The condensate generated in the second heat exchanger 3 is treated by the condensate treatment device 8 and then flows into the atomization treatment device 5 .

[0095] Among them, the condensate treatment medium may include any one of the following or a combination thereof: a neutralizer, a filter medium, etc. Taking the case where the condensate treatment medium includes a neutralizer as an example, the neutralizer can be used to neutralize the condensate generated on the heat exchange component 31. Among them, the condensate is usually acidic, and the neutralizer is used to adjust the pH value of the condensate. Specifically, when an alkaline neutralizer is added to the acidic condensate, an acid-base neutralization reaction occurs, so that the pH value of the condensate is adjusted to a neutral range. When the pH value of the condensate is adjusted to a suitable range, the condensate can meet environmental emission requirements when it is subsequently atomized into water mist by the atomization module 54, and at the same time, it can avoid corrosion of subsequent equipment (such as the atomization module 54) and the flow channel caused by the acidic condensate, that is, it can protect the atomization module 54 and the flow channel downstream of the atomization module 54.

[0096] In addition, the condensate treatment medium may also include a filter medium, which may be used to intercept solid particles, make the condensate clear, and reduce the turbidity of the condensate. When the filtered condensate flows to the housing 50, solid particulate impurities may be prevented from being deposited on the surface of the atomization module 54, thereby affecting the atomization efficiency of the atomization module 54.

[0097] In one embodiment, the gas water heater may further include an outlet channel 9, which is used to guide the condensed water mist generated in the atomization treatment device 5 and the flue gas introduced into the accommodating cavity of the atomization treatment device 5 through the drainage channel 6 out of the accommodating cavity and guide it to the smoke exhaust pipe.

[0098] In this embodiment, the gas water heater may also be provided with an outlet channel 9 having an inlet and an outlet, the inlet of the outlet channel 9 being connected to the accommodating cavity of the atomization treatment device 5, and the outlet of the outlet channel 9 extending to the smoke exhaust pipe.

[0099] The smoke exhaust pipe may be provided with an opening and closing component that opens or closes with the smoke, and the outlet of the outlet channel 9 is located upstream of the opening and closing component. Specifically, the opening and closing component that opens or closes with the smoke may be a windproof cap. The windproof cap can prevent backflow of wind, ensure the normal air pressure in the combustion chamber, and make the gas combustion stable. When the gas water heater is in operation, the windproof cap is in an open state, so that the smoke and the mixed fluid of the smoke and the condensed water mist can be discharged outward through the smoke exhaust pipe.

[0100] Furthermore, the gas water heater may further include a discharge component, the discharge channel 9 is formed in the discharge component, and the discharge component at least partially passes through the inner cavity of the second heat exchanger 3 .

[0101] The outlet channel 9 may be in various forms. For example, the outlet channel 9 may be formed in an independent outlet component, and the outlet component may be arranged inside the condensing shell 30, or may be located outside the condensing shell 30, or may be located partially inside the condensing shell 30 and partially outside the condensing shell 30; or, the outlet channel 9 may be formed on the condensing shell 30, that is, by setting a structure on the condensing shell 30 to form the outlet channel 9; or, the outlet channel 9 may be independently formed or formed in combination in other forms. In this embodiment, the outlet channel 9 is mainly formed in the outlet component as an example for description.

[0102] like Figure 1 As shown, the outlet component can partially pass through the inner cavity of the second heat exchanger 3; Figure 2 As shown, the lead-out component can completely pass through the inner cavity of the second heat exchanger 3. When the lead-out component at least partially passes through the inner cavity of the second heat exchanger 3, since the target flue gas is guided to the flue gas outlet 302 through an independent lead-out component, the lead-out component partially passing through the inner cavity of the second heat exchanger 3 can completely isolate the target flue gas from the heat exchange component 31 in the inner cavity of the second heat exchanger 3, and can avoid the target flue gas from contacting the heat exchange component 31 for flowing through water, thereby preventing the water mist mixed in the target flue gas from secondary condensation.

[0103] In addition, the inner cavity of the second heat exchanger 3 can be used to insulate or even heat the mixture of flue gas and condensed water mist in the outlet component, thereby ensuring that the mixture of flue gas and condensed water mist can maintain or reach a higher temperature when flowing through the outlet component and then flow to the smoke exhaust pipe, thereby making it difficult for the condensed water mist in the mixture to undergo secondary condensation when being discharged outwardly through the smoke exhaust pipe.

[0104] When the outlet channel 9 is formed on the outlet component, in addition to being able to introduce the mixture of flue gas and condensed water mist into the smoke exhaust pipe, the mixture of flue gas and condensed water mist can be efficiently introduced into the smoke exhaust pipe by cleverly setting the flow cross-section of the outlet component and the positions of the inlet and outlet, without affecting the discharge of the flue gas after heat exchange in the second heat exchanger 3.

[0105] Specifically, when the outlet channel 9 is formed in the outlet component, the outlet component may include a second tube body 90 , and the outlet channel 9 is disposed in the second tube body 90 .

[0106] In this embodiment, the outlet component may be in the form of a hollow tube, for example, the outlet component may include a second tube 90, and the second tube 90 may include at least one hollow pipe. The flow cross-section of the second tube 90 is smaller than the flow cross-section of the smoke outlet 302. Specifically, the ratio of the flow cross-sectional area of ​​the outlet of the second tube 90 to the flow cross-sectional area of ​​the smoke outlet 302 is between 6% and 16%.

[0107] The ratio of the flow cross-sectional area of ​​the outlet of the second tube body 90 to the flow cross-sectional area of ​​the smoke outlet 302 is within the above range. For example, when the ratio of the flow cross-sectional area of ​​the outlet of the second tube body 90 to the flow cross-sectional area of ​​the smoke outlet 302 is less than 16%, it can ensure that the second tube body 90 whose outlet extends to the vicinity of the smoke outlet 302 does not occupy too much flow area of ​​the smoke outlet 302, and ensure that the smoke after the secondary heat exchange with the heat exchange component 31 in the second heat exchanger 3 can be smoothly discharged to the smoke exhaust pipe through the remaining part not occupied by the outlet of the second tube body 90. At the same time, when the ratio of the flow cross-sectional area of ​​the outlet of the second tube body 90 to the flow cross-sectional area of ​​the smoke outlet 302 is greater than 6%, it can ensure that the mixture of smoke and condensed water mist in the second tube body 90 can be smoothly discharged to the smoke exhaust pipe through the outlet of the second tube body 90.

[0108] In a specific embodiment, taking the second tube body 90 as an example of a tube body with a constant flow cross-section, for a gas water heater, when the flow cross-section of its flue gas outlet 302 is constant, when the flow cross-section of the second tube body 90 is within a reasonable range (that is, when the proportion of the cross-sectional area of ​​the flue gas outlet 302 occupied by the second flow channel is within a reasonable range), in addition to being able to achieve that the flue gas after secondary heat exchange and the mixture of flue gas and condensed water mist can be smoothly discharged to the smoke exhaust pipe through the smoke exhaust pipe, the smaller flow cross-section of the second tube body 90 can also be used to maintain the pressure of the mixture of flue gas and condensed water mist, so that the mixture can be discharged from the second tube body 90 at a higher flow rate; when the mixture is discharged at a higher flow rate, it can in turn drive the flue gas after secondary heat exchange to be efficiently discharged out through the smoke exhaust pipe.

[0109] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0110] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0111] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A gas water heater, characterized in that: The gas water heater comprises: A combustion device, a first heat exchanger, and a second heat exchanger are arranged in sequence; A fan, the fan is used to drive the high-temperature flue gas generated by the combustion device to flow through the first heat exchanger and the second heat exchanger in sequence; an atomizing device, the atomizing device being in communication with the inner cavity of the second heat exchanger, the condensed water generated in the second heat exchanger being able to flow into the atomizing device, and the atomizing device being used to process the condensed water to generate condensed water mist; A drainage channel, the drainage channel is used to introduce the flue gas before flowing into the second heat exchanger and / or flowing through a part of the second heat exchanger into the atomization processing device; The atomizing treatment device is connected to the smoke exhaust pipe of the gas water heater, and the condensed water mist can flow toward the smoke exhaust pipe along with the smoke introduced into the atomizing treatment device.

2. The gas water heater according to claim 1, characterized in that: The gas water heater further comprises a flow guiding component, and the flow guiding channel is formed in the flow guiding component.

3. The gas water heater according to claim 2, characterized in that: The atomization treatment device comprises a shell, wherein a containing cavity is arranged in the shell, and smoke entering the drainage component flows into the containing cavity through the drainage channel.

4. The gas water heater according to claim 3, characterized in that: The shell is provided with a condensate inlet and a smoke inlet, and the condensate inlet is communicated with the inner cavity of the second heat exchanger. The condensate generated in the second heat exchanger can flow into the accommodating cavity through the condensate inlet, and the smoke introduced by the drainage component can flow into the accommodating cavity through the smoke inlet.

5. The gas water heater according to claim 4, characterized in that: The position of the condensed water inlet is lower than the position of the flue gas inlet in the height direction.

6. The gas water heater according to claim 3, characterized in that: The atomization treatment device comprises an atomization module, and the atomization module is arranged at the lower part of the shell.

7. The gas water heater according to claim 3, characterized in that: The atomization treatment device is provided with a water level monitoring module, which is communicatively connected to the controller, and the controller is communicatively connected to the atomization treatment device; when the water level monitoring module detects that the level of condensed water flowing into the atomization treatment device is higher than a preset water level, the controller controls the atomization treatment device to turn on the atomization function.

8. The gas water heater according to claim 7, characterized in that: In the height direction, the preset water level is lower than the position of the exhaust port of the guide component.

9. The gas water heater according to claim 4, characterized in that: The exhaust port of the guide component is connected to the smoke inlet or the guide component extends into the accommodating cavity through the smoke inlet and the exhaust port is located in the accommodating cavity.

10. The gas water heater according to claim 4, characterized in that: The condensed water inlet is an inlet for the condensed water to flow into the accommodating cavity, or the condensed water inlet is an inlet for the condensed water guide pipe to extend into the accommodating cavity.

11. The gas water heater according to claim 1, characterized in that: The gas water heater further comprises a condensed water treatment device, which is used to treat the condensed water generated in the second heat exchanger and guide the treated condensed water to the atomization treatment device.

12. The gas water heater according to claim 11, characterized in that: The condensed water treatment device comprises a shell, in which a condensed water treatment medium is arranged, and the condensed water generated in the second heat exchanger flows into the atomization treatment device after being treated by the condensed water treatment device.

13. The gas water heater according to claim 2, characterized in that: The fan is arranged between the first heat exchanger and the second heat exchanger along the flue gas flow direction, the outlet of the fan is connected with the inner cavity of the second heat exchanger, and the flue gas flowing out of the fan outlet flows into the inner cavity of the second heat exchanger.

14. The gas water heater as claimed in claim 2 or 13, characterized in that: The drainage component includes a first tube body. When the gas water heater is in operation, part of the flue gas upstream of the second heat exchanger enters the first tube body. The flue gas entering the first tube body flows through the drainage channel and then flows into the accommodating cavity of the atomization treatment device.

15. The gas water heater according to claim 14, characterized in that: The first tube body includes an air inlet and an exhaust port, the air inlet is communicated with the flue gas channel upstream of the second heat exchanger, and the exhaust port is communicated with the accommodating chamber of the atomization treatment device.

16. The gas water heater according to claim 15, characterized in that: The air inlet is communicated with a channel downstream of the impeller of the fan, so as to guide part of the smoke flowing out of the impeller of the fan into the accommodating chamber of the atomization treatment device through the drainage channel.

17. The gas water heater according to claim 2, characterized in that: The flow guiding component is at least partially disposed in the inner cavity of the second heat exchanger.

18. The gas water heater according to claim 15, characterized in that: The exhaust port extends into the accommodating chamber of the atomization treatment device.

19. The gas water heater according to claim 1, characterized in that: The gas water heater also includes a guide channel, which is used to guide the condensed water mist generated in the atomization treatment device and the smoke introduced into the accommodating cavity of the atomization treatment device through the drainage channel out of the accommodating cavity and guide them to the smoke exhaust pipe.

20. The gas water heater according to claim 19, characterized in that: The inlet of the outlet channel is communicated with the accommodating chamber of the atomization processing device, and the outlet of the outlet channel extends to the smoke exhaust pipe.

21. The gas water heater according to claim 20, characterized in that: The gas water heater further comprises a discharge component, the discharge channel is formed in the discharge component, and the discharge component at least partially passes through the inner cavity of the second heat exchanger.

22. The gas water heater according to claim 21, characterized in that: The outlet component includes a second tube body, and the outlet channel is arranged in the second tube body.

23. The gas water heater according to claim 6, characterized in that: The atomization module is an ultrasonic generator.

24. The gas water heater according to claim 19, characterized in that: An opening and closing component that opens or closes along with the smoke is arranged in the smoke exhaust pipe, and the outlet of the outlet channel is located upstream of the opening and closing component.

Images