Gas water heating device

Abstract

The present invention discloses a gas water heating device, which comprises: a combustion device, a first heat exchanger, and a second heat exchanger arranged in sequence; a blower for driving 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 communicated with the inner cavity of the second heat exchanger, the condensed water generated in the second heat exchanger can flow into the atomization treatment device, and the atomization treatment device is used for treating the condensed water to generate condensed water water mist; a diversion channel for introducing the flue gas before flowing into the second heat exchanger and / or flowing through a part of the second heat exchanger into the atomization treatment device; the atomization treatment device is communicated with the exhaust pipe of the gas water heating device, and the condensed water water mist can flow towards the exhaust pipe along with the flue gas in the atomization treatment device. The present application can not only cancel the condensed water discharge pipe, but also utilize the heat of the flue gas to prevent secondary condensation of the condensed water water mist during the discharge process.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a gas water heating device. Background Art

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

[0003] During the use of a gas water heater, the high-temperature flue gas generated by the burner exchanges heat with the heat exchanger once to form medium-temperature flue gas with a still 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, and the medium-temperature flue gas is subjected to secondary heat exchange with the condensing heat exchanger before being discharged. However, after the medium-temperature flue gas exchanges heat with the condensing heat exchanger, the temperature of the flue gas can drop below 100°C, and condensed water is likely to be generated.

[0004] For the above-mentioned gas water heater provided with a condensing heat exchanger (hereinafter referred to as a condensing gas water heater), currently, a condensed water discharge pipe usually needs to be provided so that the condensed water can be discharged into the sewer through the condensed water discharge pipe. However, the installation of the condensed water discharge pipe requires pre-buried pipelines or reserved installation holes in advance, which makes the condensing gas water heater greatly affected by the installation environment factors, and the condensed water discharge pipe is usually exposed to the external environment, affecting the overall aesthetics of the machine.

[0005] Therefore, it is necessary to propose a gas water heating device to solve at least one of the above problems. Summary of the Invention

[0006] Aiming at the defects existing in the prior art, in an embodiment of the present invention, a gas water heating device is provided, which can not only cancel the condensed water discharge pipe, but also utilize the heat of the flue gas to prevent secondary condensation of the condensed water mist during the discharge process.

[0007] The specific technical solution of the embodiment of the present invention is as follows:

[0008] A gas water heating device, the gas water heating device comprising: a combustion device, a first heat exchanger, and a second heat exchanger arranged in sequence; a blower, the blower being configured 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, the atomization treatment device being connected to the inner cavity of the second heat exchanger, the condensed water generated in the second heat exchanger being able to flow into the atomization treatment device, and the atomization treatment device being configured to treat the condensed water to generate condensed water mist; a drainage channel, the drainage channel being configured 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 treatment device; the atomization treatment device being connected to the exhaust pipe of the gas water heating device, and the condensed water mist being able to flow towards the exhaust pipe along with the flue gas introduced into the atomization treatment device.

[0009] In a preferred embodiment, the gas water heating device further comprises a drainage component, and the drainage channel is formed in the drainage component.

[0010] In a preferred embodiment, the atomization treatment device comprises a housing, and an accommodation cavity is arranged in the housing. The flue gas entering the drainage component flows into the accommodation cavity through the drainage channel.

[0011] In a preferred embodiment, a condensed water inlet and a flue gas inlet are arranged on the housing. The condensed water inlet is connected to the inner cavity of the second heat exchanger, the condensed water generated in the second heat exchanger can flow into the accommodation cavity through the condensed water inlet, and the flue gas introduced by the drainage component can flow into the accommodation cavity through the flue gas inlet.

[0012] 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.

[0013] 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.

[0014] 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 a controller, and the controller is communicatively connected to the atomization treatment device; when the water level monitoring module detects that the liquid level of the 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.

[0015] 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.

[0016] In a preferred embodiment, the exhaust port of the drainage component is connected to the flue gas inlet, or the drainage component extends into the accommodation cavity through the flue gas inlet and the exhaust port is located in the accommodation cavity.

[0017] In a preferred embodiment, the condensate inlet is an inlet for the condensate to flow into the accommodation cavity, or the condensate inlet is an inlet where the condensate water conduit extends into the accommodation cavity.

[0018] In a preferred embodiment, the gas water heating device further includes a condensate water treatment device, which is used to treat the condensate water generated in the second heat exchanger and direct the treated condensate water into the atomization treatment device.

[0019] In a preferred embodiment, the condensate water treatment device includes a housing, and a condensate water treatment medium is arranged inside the housing. The condensate water generated in the second heat exchanger flows into the atomization treatment device after being treated by the condensate water treatment device.

[0020] 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 communicated with the inner cavity of the second heat exchanger, and the flue gas flowing out of the fan outlet flows towards the inner cavity of the second heat exchanger.

[0021] In a preferred embodiment, the drainage component includes a first pipe body. When the gas water heating device is in an operating state, a part of the flue gas upstream of the second heat exchanger enters the first pipe body, and the flue gas entering the first pipe body flows through the drainage channel and then flows into the accommodation cavity of the atomization treatment device.

[0022] In a preferred embodiment, the first pipe 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 accommodation cavity of the atomization treatment device.

[0023] In a preferred embodiment, the air inlet is communicated with the channel downstream of the impeller of the fan, so as to introduce a part of the flue gas flowing out of the impeller of the fan into the accommodation cavity of the atomization treatment device through the drainage channel.

[0024] In a preferred embodiment, at least a part of the drainage component is arranged inside the inner cavity of the second heat exchanger.

[0025] In a preferred embodiment, the exhaust port extends into the accommodation cavity of the atomization treatment device.

[0026] In a preferred embodiment, the gas water heating device further includes a discharge channel for discharging the condensed water water mist generated in the atomization treatment device and the flue gas introduced into the accommodation cavity of the atomization treatment device through the diversion channel from the accommodation cavity and guiding it to the exhaust pipe.

[0027] In a preferred embodiment, the inlet of the discharge channel is communicated with the accommodation cavity of the atomization treatment device, and the outlet of the discharge channel extends to the exhaust pipe.

[0028] In a preferred embodiment, the gas water heating device further includes 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.

[0029] In a preferred embodiment, the discharge component includes a second pipe body, and the discharge channel is arranged in the second pipe body.

[0030] In a preferred embodiment, the atomization module is an ultrasonic generator.

[0031] In a preferred embodiment, an opening and closing component that opens or closes with the flue gas is arranged in the exhaust pipe, and the outlet of the discharge channel is located upstream of the opening and closing component.

[0032] The technical solution of the present invention has the following remarkable beneficial effects:

[0033] The gas water heating device provided in the embodiment of the present application is specifically a condensing gas water heating device. By setting an atomization treatment device, a diversion channel, etc. that are communicated with the inner cavity of the second heat exchanger, the condensed water generated in the second heat exchanger can flow into the atomization treatment device. When the gas water heating device is in operation, the flue gas before flowing into the second heat exchanger and / or flowing through part of the second heat exchanger is introduced into the atomization treatment device through the diversion channel; the condensed water water mist generated after being treated by the atomization treatment device flows to the exhaust pipe along with the flue gas introduced into the atomization treatment device through the diversion channel, so that the condensing gas water heating device realizes no condensed water discharge, and thus the condensed water discharge pipe can be cancelled, improving the overall beauty of the machine. At the same time, the problem that the installation of the condensing gas water heating device is limited due to the lack of pre-buried pipelines or reserved installation holes is solved.

[0034] Among them, for some special working conditions, such as when the external environmental temperature is relatively low and / or affected by factors such as a relatively long exhaust pipe, the condensed water mist in the flue gas is prone to the problem of secondary condensation. In the implementation mode of the present application, since the target flue gas introduced by the diversion channel is medium-temperature flue gas with a relatively high temperature (referred to as the target flue gas), this part of the flue gas has not yet been heat-exchanged with the heat-exchange components in the second heat exchanger or has not been fully heat-exchanged with the heat-exchange components in the second heat exchanger. Therefore, when the target flue gas flows into the atomization treatment device through the diversion channel and drives the condensed water mist generated in the atomization treatment device to the exhaust pipe, even if the exhaust pipe is relatively long and / or the external environmental temperature is relatively low, due to the relatively high temperature of the target flue gas, when it flows through the exhaust pipe, even if there is a certain temperature drop, the condensed water mist carried by the target flue gas is not likely to undergo secondary condensation, thereby being able to overcome various problems that may occur after the secondary condensation of the condensed water mist, such as dripping at the outlet of the exhaust pipe.

[0035] Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the ways in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited thereby in scope. Within the spirit and terms of the appended claims, embodiments of the present invention include many variations, modifications, and equivalents. Features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present invention in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present invention, rather than specifically limiting the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions according to specific circumstances to implement the present invention under the teaching of the present invention.

[0037] Figure 1 It is a schematic structural diagram of a gas water heater provided in an embodiment of the present application;

[0038] Figure 2 It is a schematic structural diagram of another gas water heater provided in an embodiment of the present application.

[0039] Reference numerals of the present application:

[0040] 2. First heat exchanger;

[0041] 3. Second heat exchanger; 30. Condensation housing; 301. Flue gas inlet; 302. Flue gas outlet; 31. Heat-exchange component;

[0042] 4. Fan

[0043] 5. Atomization treatment device; 50. Housing; 51. Condensate inlet; 52. Flue gas inlet; 54. Atomization module; 55. Water level monitoring module

[0044] 6. Drainage channel; 60. First pipe body; 601. Air inlet; 602. Exhaust port

[0045] 8. Condensate treatment device; 81. Outer shell

[0046] 9. Export channel; 90. Second pipe body Specific embodiments

[0047] The following will combine the accompanying drawings and specific embodiments to elaborate on the technical solutions of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, various equivalent modifications made by those skilled in the art to the present invention all fall within the scope defined by the appended claims of this application.

[0048] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application herein 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.

[0050] The present invention provides a gas water heating device, which can not only eliminate the condensate discharge pipe, but also prevent secondary condensation of the condensate water mist during the discharge process by using the heat of the flue gas on the premise of ensuring the thermal efficiency.

[0051] Please refer to Figure 1 or Figure 2, in the embodiments of the specification of the present application, a gas water heating device is provided, which may include: a combustion device, a first heat exchanger 2, and a second heat exchanger 3 arranged in sequence; a blower 4 for driving 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 connected to the inner cavity of the second heat exchanger 3, 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 generate condensed water mist; a diversion channel 6 for introducing the flue gas before flowing into the second heat exchanger 3 and / or flowing through a part of the second heat exchanger 3 into the atomization treatment device 5; the atomization treatment device 5 is communicated with the exhaust pipe of the gas water heating device, and the condensed water mist can flow to the exhaust pipe along with the flue gas introduced into the atomization treatment device 5.

[0052] The gas water heating device provided in the embodiments of the present application is specifically a condensing gas water heater. By arranging the first heat exchanger 2 and the second heat exchanger 3 in sequence along the flow direction of the flue gas, it 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, thereby ensuring that the gas water heating device has high energy efficiency and also ensuring that the discharged flue gas has a low temperature, achieving the purpose of energy conservation and environmental protection.

[0053] The gas water heating device provided in the embodiments of the present application is specifically a condensing gas water heating device. By arranging an atomization treatment device 5, a diversion channel 6, etc. connected to the inner cavity of the second heat exchanger 3, the condensed water generated in the second heat exchanger 3 can flow into the atomization treatment device 5. When the gas water heating device is in operation, the diversion channel 6 is used to introduce the flue gas before flowing into the second heat exchanger 3 and / or flowing through a part of the second heat exchanger 3 into the atomization treatment device 5; the condensed water mist generated after being treated by the atomization treatment device flows to the exhaust pipe along with the flue gas introduced into the atomization treatment device 5 through the diversion channel 6, so that the condensing gas water heating device realizes no condensed water discharge, and thus the condensed water discharge pipe can be cancelled, improving the overall aesthetics of the machine, and at the same time solving the problem that the installation of the condensing gas water heating device is limited due to no pre-buried pipeline or reserved installation hole in advance.

[0054] Among them, for some special working conditions, such as when the external environmental temperature is relatively low and / or affected by factors such as the relatively long length of the smoke exhaust pipe, the problem of secondary condensation of the condensed water mist in the flue gas is likely to occur. In the implementation manner of the present application, since the target flue gas introduced by the diversion channel 6 is medium-temperature flue gas with a relatively high 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 relatively high temperature flows into the atomization treatment device 5 through the diversion 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 relatively long and / or the external environmental temperature is relatively low, due to the relatively high temperature of the target flue gas, when it undergoes a certain temperature drop during the process of flowing through the smoke exhaust pipe, the condensed water mist carried by the target flue gas is not likely to undergo secondary condensation, thereby being able to overcome various problems that may occur after the secondary condensation of the condensed water mist.

[0055] The following will specifically describe the present application in combination with specific drawings and implementation manners.

[0056] In this implementation manner, the gas hot water device may mainly include: a combustion device, a first heat exchanger 2, a second heat exchanger 3, a blower 4, an atomization treatment device 5, a diversion channel 6, etc.

[0057] Among them, the heat generated by the combustion device burning gas is used to heat the fluid flowing through the first heat exchanger 2 and the second heat exchanger 3. Specifically, the combustion device may be in the form of a burner with adjustable power.

[0058] The blower 4 is used to provide the driving force for the air flow. Specifically, the blower 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 installation position of the blower 4 itself may vary according to different actual use scenarios, and the present application does not make specific limitations here. For example, in the vertical height direction, the blower 4, the first heat exchanger 2, and the burner may be arranged in sequence. In addition, the blower 4 may specifically be in the form of a variable-frequency blower. The rotation speed of the blower 4 can adaptively change with the change of conditions such as the combustion load.

[0059] Water to be heated is circulated in the first heat exchanger 2 and the second heat exchanger 3. Generally, the fluid may be water, but it does not exclude that it may also be a mixture of water and steam, or other fluid forms. In the following implementation manners, the fluid is described by taking water as an example, and other fluid forms can be analogously referred to, and the present application will not elaborate here. The water flowing into the gas hot water device from the outside can first flow through the condensation heat exchanger for preheating, and then enter the main heat exchanger for a large temperature rise.

[0060] The first heat exchanger 2 and the second heat exchanger 3 are arranged in sequence along the flow direction of the flue gas. Among them, the first heat exchanger 2 can be a heat exchanger relatively closer to the flue gas generation source (combustion device), and it serves as the main heat exchanger of the gas water heater. The specific form of the first heat exchanger 2 can be a finned heat exchanger, or a tubular heat exchanger, etc. Of course, the shape, structure, etc. of the first heat exchanger 2 can be different according to different actual use scenarios, and the present application does not make specific limitations here.

[0061] 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 of the combustion device can exchange heat 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 further decreases.

[0062] Among them, the second heat exchanger 3 can include a hollow condensing housing 30 for the flow of flue gas. An inner cavity is formed in the condensing housing 30, and a heat exchange component 31 for the flow of water can be arranged in the inner cavity. The condensing housing 30 is provided with a flue gas inlet 301 and a flue gas outlet 302. 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 condensate. Among them, the condensate will flow towards the bottom of the inner cavity of the second heat exchanger 3 under the action of gravity.

[0063] The atomization treatment device 5 is a device that can convert a liquid or a gas into tiny droplets. The atomization treatment device 5 is communicated with the inner cavity of the second heat exchanger 3, and the condensate generated in the second heat exchanger 3 can flow into the atomization treatment device 5, and the condensate flowing into the atomization treatment device 5 can be atomized by the atomization treatment device 5 to form water mist. The water mist needs to be discharged out of the gas water heater under the driving action of a 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 embodiments of the present application, it is not excluded that the fluid providing the driving force is in other forms. For example, a fluid driving device can be arranged inside the atomization treatment device 5, or a combination of multiple driving forms. In the embodiments of the present application, the above-mentioned flue gas providing the driving force is mainly used as an example for illustration.

[0064] The atomization treatment device 5 is communicated with the smoke exhaust pipe of the gas water heater. The condensed water water mist generated after being treated by the atomization treatment device 5 flows outwards along with the smoke generated by the combustion device towards the smoke exhaust pipe, so that the condensing gas water heater realizes no condensed water discharge. Furthermore, the condensed water discharge pipe can be cancelled, improving the overall aesthetics of the machine. At the same time, it solves the problem that the installation of the condensing gas water heater is restricted due to the lack of pre-buried pipelines or reserved installation holes in advance.

[0065] For the above-mentioned condensing gas water heater, by atomizing the condensed water and discharging it externally along with the smoke, the purpose of no condensed water discharge can be basically achieved. However, in some specific scenarios, it still faces further technical problems.

[0066] For example, when the high-temperature smoke 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, when the smoke with a relatively low temperature carries the condensed water water mist and discharges it externally, it will come into contact with the smoke exhaust pipe. When the external environmental temperature is relatively low and / or affected by factors such as the relatively long length of the smoke exhaust pipe, the condensed water water mist in the smoke is likely to undergo secondary condensation.

[0067] The condensed water after secondary condensation will accumulate in the smoke exhaust pipe and flow under the action of gravity. Depending on the installation direction of the smoke exhaust pipe, the condensed water after secondary condensation will flow to different positions. For example, when the smoke exhaust pipe is slightly inclined outwards from the inside, the condensed water after secondary condensation will drip outwards, affecting the user experience.

[0068] In this embodiment, the gas water heater is provided with a diversion channel 6, which is used to introduce the target smoke into the atomization treatment device 5. The target smoke introduced into the atomization treatment device 5 by the diversion channel 6 has a relatively high temperature. The target smoke may include the smoke before flowing into the second heat exchanger 3 and / or the smoke flowing through a part of the second heat exchanger 3. Specifically, the target smoke may include any one or a combination of the following: the relatively high-temperature medium-temperature smoke after heat exchange with the first heat exchanger 2, and the relatively high-temperature smoke that has not been fully heat-exchanged with the heat exchange component 31 in the second heat exchanger 3. When the relatively high-temperature target smoke flows into the atomization treatment device 5 through the diversion channel 6 and drives the condensed water water mist generated in the atomization treatment device 5 to the smoke exhaust pipe, even if the length of the smoke exhaust pipe is relatively long and / or the external environmental temperature is relatively low, due to the relatively high temperature of the target smoke, when it undergoes a certain temperature drop during the process of flowing through the smoke exhaust pipe, the condensed water water mist carried by the target smoke is not likely to undergo secondary condensation, thus being able to overcome various problems that may occur after the secondary condensation of the condensed water water mist.

[0069] In one embodiment, the gas water heating device may further include a drainage component, and the drainage channel 6 is formed in the drainage component.

[0070] In this embodiment, the form of the drainage channel 6 may include various types. For example, the drainage channel 6 may be formed in an independent drainage component, and the drainage component may be located inside the condensation housing 30, outside the condensation housing 30, or partially inside and partially outside the condensation housing 30; alternatively, the drainage channel 6 may be formed in the condensation housing 30 of the second heat exchanger 3, that is, by setting a structure on the condensation housing 30 to form the drainage channel 6; or the drainage channel 6 may also be independently formed or formed in cooperation through other forms. In this embodiment, the description is mainly carried out with the drainage channel 6 formed in the drainage component as the main case.

[0071] When the drainage channel 6 is formed in the drainage component, in addition to being able to be used to introduce the target flue gas into the atomization treatment device 5, by cleverly setting the inlet position of the drainage component, the temperature of the introduced flue gas can be accurately controlled. Specifically, the inlet of the drainage component can be set at a position where the flue gas temperature is relatively high, so as to introduce the target flue gas into the atomization treatment device 5. The outlet of the drainage component can be connected to the atomization treatment device 5, so as to efficiently direct the target flue gas into the atomization treatment device 5. During use, the condensed water water mist generated after being treated by the atomization treatment device 5 can flow along with the flue gas flowing into the atomization treatment device 5 through the drainage component to the exhaust pipe.

[0072] 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, and the outlet of the fan 4 is communicated with the inner cavity of the second heat exchanger 3, and the flue gas flowing out of the outlet of the fan 4 flows towards the inner cavity of the second heat exchanger 3.

[0073] In this embodiment, along the flue gas flow direction, the fan 4 may be located between the first heat exchanger 2 and the second heat exchanger 3. The fan 4 has opposite inlets and outlets. Among them, 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 of the combustion device will first flow through the first heat exchanger 2, exchange heat with the first heat exchanger 2, and form medium-temperature flue gas after the first heat exchange. This part of the medium-temperature flue gas enters the fan 4 through the inlet of the fan 4 and flows out of the fan 4 through the outlet and into the inner cavity of the second heat exchanger 3 to perform secondary heat exchange with the heat exchange component 31 of the second heat exchanger 3.

[0074] In a specific embodiment, the drainage component may include a first pipe body 60. When the gas water heating device is in an operating state, a part of the flue gas upstream of the second heat exchanger 3 enters the first pipe body 60, and the flue gas entering the first pipe body 60 flows through the drainage channel 6 and then into the accommodation cavity of the atomization treatment device 5.

[0075] In this embodiment, the specific form of the drainage component is in the form of a hollow pipe body. For example, the drainage component may include a first pipe body 60, and the first pipe body 60 may include at least one hollow pipe. The first pipe body 60 may specifically be made of a high-temperature resistant material so as to be able to be used for circulating relatively high-temperature flue gas. In addition, the first pipe body 60 may be a flexible pipe body, and the flexible pipe body can have better adaptability during installation and achieve interference-free installation in a limited space. When the gas water heating device is in an operating state, the high-temperature flue gas generated by the combustion of the combustion device, under the action of the fan 4, first flows through the first heat exchanger 2, 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 pipe body 60 through the outlet of the fan 4. The flue gas entering the first pipe body 60 is the flue gas upstream of the second heat exchanger 3, which has not been heat-exchanged with the second heat exchanger 3 and has a relatively high temperature. This part of the flue gas with a relatively high temperature flows into the accommodation cavity of the atomization treatment device 5 through the drainage channel 6 formed inside the first pipe body 60, so that the condensed water water mist generated in the atomization treatment device 5 can be guided to the exhaust pipe at a relatively high temperature and is not prone to secondary condensation.

[0076] Wherein, the first pipe body 60 may include an air inlet 601 and an air outlet 602. The air inlet 601 is communicated with the flue gas channel upstream of the second heat exchanger 3, and the air outlet 602 is communicated with the accommodation cavity of the atomization treatment device 5.

[0077] The first pipe body 60 may include an air inlet 601 and an air outlet 602. Among them, the air inlet 601 may be communicated with the flue gas channel upstream of the second heat exchanger 3 for introducing the flue gas upstream of the second heat exchanger 3 into the first pipe body 60. Specifically, the condensation housing 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 communicated with the channel downstream of the impeller of the fan 4 to introduce a part of the flue gas flowing out of the impeller of the fan 4 into the accommodation cavity of the atomization treatment device 5 through the drainage channel 6.

[0078] Taking the drainage channel 6 as the first pipe body 60 as an example, the air inlet 601 of the first pipe body 60 can be fixed at the flue gas inlet 301 of the condensation housing 30; alternatively, the air inlet 601 of the first pipe body 60 can be fixed at the outlet of the fan 4, or the air inlet 601 of the first pipe body 60 can be fixed between the outlet of the fan 4 and the flue gas inlet 301 of the condensation housing 30, or the air inlet 601 can be fixed in the inner cavity of the second heat exchanger 3. 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 flue gas outlet 302, at a certain distance from the flue gas outlet 302, and is arranged at intervals with the heat exchange component 31 in the second heat exchanger 3, so as to ensure that the flue gas introduced by the air inlet 601 is relatively high-temperature flue gas that has not been heat-exchanged or completely heat-exchanged with the heat exchange component 31.

[0079] Taking the example that the first pipe body 60 is fixed at the flue gas inlet 301 of the condensation housing 30, the flow cross-section of the first pipe 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 pipe body 60 to the flow cross-sectional area of the flue gas inlet 301 is between 5% and 15%. Since the flue gas flowing in from the flue gas inlet 301 is basically medium-temperature flue gas that has been heat-exchanged 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, so as to improve the thermal efficiency of the gas water heating device. 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 pipe body 60 to the flow cross-sectional area of 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 into the first pipe body 60, the influence on the thermal efficiency of the gas water heating device is relatively small and can be almost ignored. That is, when the ratio of the flow cross-sectional area of the air inlet 601 of the first pipe body 60 to the flow cross-sectional area of the flue gas inlet 301 is controlled within the above reasonable range, the gas water heating device can maintain a relatively high thermal efficiency, and in addition, the medium-temperature flue gas diverted by the first pipe body 60 can be used to realize the external discharge of the condensed water water mist in the atomization treatment device 5.

[0080] In order to ensure that there is enough medium-temperature flue gas introduced into the accommodation cavity of the atomization treatment device 5 through the first pipe body 60 to realize the external discharge of the condensed water water mist in the atomization treatment device 5, the ratio of the flow cross-sectional area of the air inlet 601 of the first pipe 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 relatively high pressure and flow rate when flowing through the first pipe body 60, the overall flow cross-sectional area of the first pipe body 60 should not be too large. Taking the first pipe body 60 as a pipe body with an equal cross-section as an example, the ratio of the flow cross-sectional area of the first pipe body 60 to the flow cross-sectional area of the flue gas inlet 301 is between 5% and 15%.

[0081] In this embodiment, the medium-temperature flue gas with a relatively high wind pressure in the channel downstream of the impeller of the fan 4 can be guided through the first pipe body 60 with a relatively small flow cross-section into the accommodation cavity of the atomization treatment device 5, that is, it is possible to introduce flue gas with a relatively high temperature and a relatively large pressure (flow rate) into the accommodation cavity of the atomization treatment device 5, so that the condensed water water mist generated in the atomization treatment device 5 can be guided to the exhaust pipe at a relatively high temperature, and secondary condensation is not likely to occur. At the same time, the external discharge of the condensed water water mist can be realized at a relatively high flow rate.

[0082] In this embodiment, the exhaust port 602 of the first pipe body 60 can be connected to the accommodation cavity of the atomization treatment device 5, so as to introduce the above-mentioned flue gas with a relatively high temperature and a relatively large pressure into the accommodation cavity of the atomization treatment device 5. Wherein, the atomization treatment device 5 includes a housing 50, and an accommodation cavity is provided in the housing 50.

[0083] An opening for installing the first pipe body 60 is provided on the housing 50. Specifically, the exhaust port 602 can be fixed at the opening, or the exhaust port 602 can extend into the accommodation cavity of the atomization treatment device 5. When the exhaust port 602 extends into the accommodation cavity of the atomization treatment device 5, the opening direction of the exhaust port 602 can be flexibly controlled so that the opening direction of the exhaust port 602 is set in a direction beneficial to driving the condensed water water mist.

[0084] In one embodiment, at least a part of the drainage component is arranged in the inner cavity of the second heat exchanger 3.

[0085] In this embodiment, the specific form of the drainage component can be in the form of a hollow pipe, such as Figure 1 shown, a part of the hollow pipe can be arranged in the inner cavity of the second heat exchanger 3, or as Figure 2 shown, the hollow pipe can be entirely arranged in 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 relatively high temperature after primary heat exchange, the inner cavity of the second heat exchanger 3 is equivalent to a heat preservation cavity. When at least a part of the drainage component is arranged in the inner cavity of the second heat exchanger 3, the heat preservation effect of the inner cavity can be utilized to keep the flue gas in the drainage component warm, ensuring that the temperature of the flue gas will not drop significantly after flowing through the drainage component. Thus, it can more reliably ensure that the flue gas with a relatively high temperature is guided into the accommodation cavity of the atomization treatment device 5, and further, the condensed water water mist generated in the atomization treatment device 5 can be efficiently guided to the exhaust pipe at a relatively high temperature for external discharge, and secondary condensation is not likely to occur.

[0086] In one embodiment, the atomization treatment device 5 can include a housing 50, an accommodation cavity is provided in the housing 50, and the flue gas entering the drainage component flows into the accommodation cavity through the drainage channel 6.

[0087] In this embodiment, the atomization treatment device 5 may include a housing 50, which may be specifically arranged on one side of the condensation housing 30 of the first heat exchanger 2. The housing 50 of the atomization treatment device 5 may be fixedly connected to the condensation housing 30, or the housing 50 of the atomization treatment device 5 may share a part of the housing wall with the condensation housing 30. The specific structure, installation position, installation method, etc. of the housing 50 of the atomization treatment 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. Specifically, the present application does not make a unique limitation here.

[0088] The housing 50 has a hollow structure, and an accommodation cavity is formed inside it, which 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 housing 50. The atomization module 54 is used to atomize the condensed water accumulated at the lower part of the housing 50 to form condensed water water mist, so that when the flue gas is introduced into the accommodation cavity through the drainage component, the condensed water water mist can flow into the flue gas in the atomization treatment device 5 along the drainage channel 6 and flow towards the smoke exhaust pipe.

[0089] Among them, the specific form of the atomization module 54 may 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 fly out by overcoming the surface tension, and then the flue gas will send out the mist particles.

[0090] The output fog volume of the ultrasonic generator is large, the fog droplets are small and uniform, which can better meet the requirements of condensed water atomization. The condensed water can be atomized efficiently and can be reliably led out by the flue gas at the same time. In addition, the aerosol volume of the ultrasonic generator can be adjusted. It can adjust the aerosol volume according to the actual working conditions, so as to ensure that the introduced flue gas is adapted to the aerosol generated by the ultrasonic generator and ensure that the aerosol generated by the ultrasonic generator can be efficiently sent out by the introduced flue gas.

[0091] Of course, in the embodiment of the present application, it is not excluded that the form of the atomization module 54 is set to other forms, for example, a jet atomizer or a vibrating sieve hole atomizer, etc.

[0092] In one embodiment, the atomization processing device 5 is provided with a water level monitoring module 55, the water level monitoring module 55 is communicatively connected to a controller, and the controller is communicatively connected to the atomization processing device 5; when the water level monitoring module 55 detects that the condensate water level flowing into the atomization processing device 5 is higher than a preset water level, the controller controls the atomization processing device 5 to turn on the atomization function.

[0093] In this embodiment, the water level monitoring module 55 may be provided on or inside the housing 50, and the water level monitoring module 55 is used to obtain the condensate water level inside the housing 50.

[0094] By providing the water level monitoring module 55, the water level of the condensate water in the current housing 50 can be accurately obtained, and dry burning of the atomization module 54 caused by too low water level can be prevented. In addition, the atomization module 54 is provided with an atomization sheet. By providing the water level monitoring module 55, the atomization sheet can be started to work only after being immersed in the condensate water, which can prevent the atomization sheet from contacting the relatively high-temperature flue gas introduced into the housing 50, ensure the reliability of the atomization sheet during operation, and extend its service life. In addition, for the atomization sheet, when it works, it usually has a better working liquid level range, and within this working liquid level range, the atomization sheet can achieve an ideal atomization efficiency. By providing the water level monitoring module 55, the current condensate water level can be accurately identified, so that the atomization sheet works within a better working liquid level range, and thus an ideal atomization effect can be achieved.

[0095] The water level monitoring module 55 can be communicatively connected to the controller of the gas water heater, and the controller itself can be communicatively connected to the atomization processing device 5. The working state of the atomization processing device 5 can be switched based on the condensate water level inside the current housing 50 obtained by the water level monitoring module 55. For example, when the water level monitoring module 55 monitors that the condensate water level inside the current housing 50 reaches the preset water level, and at this time the gas water heater is in an operating state, the controller can control the atomization processing device 5 to turn on the atomization function, atomize the condensate water, and at the same time use the flue gas introduced into the accommodation cavity of the housing 50 to send the atomized condensate water mist out of the gas water heater through the exhaust pipe.

[0096] In one embodiment, the housing 50 is provided with a condensate water inlet 51 and a flue gas inlet 52. The condensate water inlet 51 is communicated with the inner cavity of the second heat exchanger 3. The condensate water generated in the second heat exchanger 3 can flow into the accommodation cavity through the condensate water inlet 51, and the flue gas introduced by the drainage component can flow into the accommodation cavity through the flue gas inlet 52.

[0097] In this embodiment, the housing 50 of the atomization treatment device 5 may be provided with a condensate water inlet 51 and a flue gas inlet 52. Among them, the condensate water inlet 51 is communicated with the inner cavity of the second heat exchanger 3, so that the condensate water generated in the second heat exchanger 3 can flow into the accommodation cavity of the housing 50 of the atomization treatment device 5 through the condensate water inlet 51. Among them, the condensate water inlet 51 is an inlet for the condensate water to flow into the accommodation cavity or the condensate water inlet 51 is an inlet for the condensate water conduit to extend into the accommodation cavity.

[0098] The flue gas inlet 52 is communicated with the drainage component, and the flue gas introduced by the drainage component can flow into the accommodation cavity through the flue gas inlet 52. Among them, the exhaust port 602 of the drainage component is connected to the flue gas inlet 52 or the drainage component extends into the accommodation cavity through the flue gas inlet 52 and the exhaust port 602 is located in the accommodation cavity.

[0099] Specifically, taking the condensate water inlet 51 as an inlet for the condensate water to flow into the accommodation cavity and the exhaust port 602 of the drainage component being connected to the flue gas inlet 52 as an example, the position of the condensate water inlet 51 is lower than the position of the flue gas inlet 52 in the height direction. In addition, when the position of the condensate water inlet 51 is set relatively low, the condensate water flowing in from the condensate water inlet 51 can efficiently converge to the bottom of the housing 50 along a shorter path. When the position of the flue gas inlet 52 is set relatively high, it can avoid the relatively high-temperature flue gas flowing in from the flue gas inlet 52 from contacting the condensate water, ensuring that the flue gas can reliably act directly on the atomized condensate water mist.

[0100] In a specific embodiment, along the height direction, the preset water level is lower than the position of the exhaust port 602 of the drainage component.

[0101] In the embodiment, since the atomization treatment device 5 will turn on the atomization function when the water level in the accommodation cavity of the housing 50 reaches the preset water level, generally, the water level in the housing 50 will 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 ensure that the relatively high-temperature flue gas introduced can smoothly discharge the condensate water mist through the exhaust pipe, so as to avoid the relatively high-temperature flue gas flowing in from the flue gas inlet 52 from directly contacting the condensate water when the position of the exhaust port 602 is below the preset water level, that is, the exhaust port 602 is blocked by the condensate water to form a water seal, resulting in the inability to introduce the flue gas with an air guiding effect into the housing 50.

[0102] In one embodiment, the gas water heating device may further include a condensate water treatment device 8, and the condensate water treatment device 8 is used to treat the condensate water generated in the second heat exchanger 3 and direct the treated condensate water to the atomization treatment device 5.

[0103] In this embodiment, the gas water heating device may further be provided with a condensate water treatment device 8. In the flow path of the condensate water, the condensate water treatment device 8 is arranged between the second heat exchanger 3 and the atomization treatment device 5. The condensate water generated in the second heat exchanger 3 can first flow into the condensate water treatment device 8, and after being treated by the condensate water treatment device 8, the treated condensate water is then guided into the atomization treatment device 5.

[0104] Furthermore, the condensate water treatment device 8 includes a housing 81, and a condensate water treatment medium is arranged inside the housing 81. The condensate water generated in the second heat exchanger 3 flows into the atomization treatment device 5 after being treated by the condensate water treatment device 8.

[0105] Among them, the condensate water treatment medium may include any one or a combination of the following: neutralizing agent, filtering medium, etc. Taking the condensate water treatment medium including a neutralizing agent as an example, the neutralizing agent can be used to neutralize the condensate water generated on the heat exchange component 31. Among them, the condensate water is usually acidic, and the neutralizing agent is used to adjust the pH value of the condensate water. Specifically, when an alkaline neutralizing agent is added to the acidic condensate water, an acid-base neutralization reaction occurs, adjusting the pH value of the condensate water towards the neutral range. When the pH value of the condensate water is adjusted to an appropriate range, the condensate water can meet the environmental emission requirements when it is atomized into water mist by the atomization module 54 later, and at the same time, it can avoid the corrosion of acidic condensate water to subsequent equipment (such as the atomization module 54) and the flow channel, that is, it can protect the atomization module 54 and the flow channel downstream of the atomization module 54.

[0106] In addition, the condensate water treatment medium may further include a filtering medium, and the filtering medium can be used to intercept solid particles, making the condensate water become clear and reducing the turbidity of the condensate water. When the filtered condensate water flows towards the housing 50, it can prevent solid particulate impurities from depositing on the surface of the atomization module 54, thereby affecting the atomization efficiency of the atomization module 54.

[0107] In one embodiment, the gas water heating device may further include a discharge channel 9, and the discharge channel 9 is used to discharge the condensate water mist generated in the atomization treatment device 5 and the flue gas introduced into the accommodation cavity of the atomization treatment device 5 through the diversion channel 6 from the accommodation cavity and guide it to the exhaust pipe.

[0108] In this embodiment, the gas water heating device may further be provided with a discharge channel 9. The discharge channel 9 has an inlet and an outlet. The inlet of the discharge channel 9 is communicated with the accommodation cavity of the atomization treatment device 5, and the outlet of the discharge channel 9 extends to the exhaust pipe.

[0109] Wherein, an opening and closing component that opens or closes with the flue gas can be provided in the exhaust pipe, 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 flue gas can specifically be a windproof cap. The windproof cap can prevent reverse 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 flue gas and the mixed fluid of the flue gas and the condensed water mist can be discharged outward through the exhaust pipe.

[0110] Furthermore, the gas water heater may further include a guiding component, the outlet channel 9 is formed in the guiding component, and the guiding component at least partially passes through the inner cavity of the second heat exchanger 3.

[0111] The form of the outlet channel 9 can include various types. For example, the outlet channel 9 can be formed in an independent guiding component, and the guiding component can be arranged inside the condensation housing 30, or can be located outside the condensation housing 30, or can be partially located inside the condensation housing 30 and partially located outside the condensation housing 30; or, the outlet channel 9 can be formed on the condensation housing 30, that is, by setting a structure on the condensation housing 30 to form the outlet channel 9; or, the outlet channel 9 can also be independently formed or formed in cooperation through other forms. In this embodiment, the description is mainly carried out by taking the outlet channel 9 formed in the guiding component as an example.

[0112] As Figure 1 shown, the guiding component can partially pass through the inner cavity of the second heat exchanger 3; as Figure 2 shown, the guiding component can completely pass through the inner cavity of the second heat exchanger 3. When the guiding 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 guiding component, the guiding component partially arranged in 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 contact between the target flue gas and the heat exchange component 31 for flowing water, thereby preventing secondary condensation of the water mist mixed in the target flue gas.

[0113] In addition, the inner cavity of the second heat exchanger 3 can be used to keep warm or even heat up the mixture of the flue gas and the condensed water mist in the guiding component, so as to ensure that when the mixture of the flue gas and the condensed water mist flows through the guiding component, it can maintain or reach a higher temperature and then flow to the exhaust pipe, and further enable the condensed water mist in the mixture to be less likely to undergo secondary condensation during the process of being discharged outward through the exhaust pipe.

[0114] When the outlet channel 9 is formed in the outlet component, in addition to being able to introduce the mixture of flue gas and condensed water mist into the exhaust pipe, by cleverly setting the flow cross-section of the outlet component and the positions of the inlet and outlet, the mixture of flue gas and condensed water mist can be efficiently introduced into the exhaust pipe without affecting the discharge of the flue gas after heat exchange in the second heat exchanger 3.

[0115] Specifically, when the outlet channel 9 is formed in the outlet component, the outlet component may include a second pipe body 90, and the outlet channel 9 is provided in the second pipe body 90.

[0116] In this embodiment, the outlet component may be in the form of a hollow pipe body. For example, the outlet component may include a second pipe body 90, and the second pipe body 90 may include at least one hollow pipe. The flow cross-section of the second pipe body 90 is smaller than the flow cross-section of the flue gas outlet 302. Specifically, the ratio of the outlet cross-sectional area of the second pipe body 90 to the flow cross-sectional area of the flue gas outlet 302 is between 6% and 16%.

[0117] The ratio of the outlet cross-sectional area of the second pipe body 90 to the flow cross-sectional area of the flue gas outlet 302 is within the above range. For example, when the ratio of the outlet cross-sectional area of the second pipe body 90 to the flow cross-sectional area of the flue gas outlet 302 is less than 16%, it can be ensured that the second pipe body 90 extending near the flue gas outlet 302 does not overly occupy the flow area of the flue gas outlet 302, ensuring that the flue gas after secondary heat exchange with the heat exchange component 31 in the second heat exchanger 3 can smoothly pass through the remaining part not occupied by the outlet of the second pipe body 90 and be discharged to the exhaust pipe. At the same time, when the ratio of the outlet cross-sectional area of the second pipe body 90 to the flow cross-sectional area of the flue gas outlet 302 is greater than 6%, it can be ensured that the mixture of flue gas and condensed water mist in the second pipe body 90 can be smoothly discharged to the exhaust pipe through the outlet of the second pipe body 90.

[0118] In a specific embodiment, taking the second pipe body 90 as a pipe body with a constant flow cross-section as an example, for a gas water heating device, when the flow cross-section of the flue gas outlet 302 is fixed, when the flow cross-section of the second pipe body 90 is within a reasonable range (that is, 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 ensuring that the flue gas after secondary heat exchange and the mixture of flue gas and condensed water mist can both be smoothly discharged to the exhaust pipe through the exhaust pipe, the smaller flow cross-section of the second pipe 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 pipe body 90 at a higher flow rate; when the mixture is discharged at a higher flow rate, in turn, it can drive the flue gas after secondary heat exchange to be efficiently discharged through the exhaust pipe.

[0119] 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 sequence between them, nor can they be construed as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0120] The above various embodiments in this specification are all described in a progressive manner. For the same or similar parts between the various embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0121] The above are only several embodiments of the present invention. Although the disclosed embodiments of the present invention are as above, the content is only an embodiment adopted for the convenience of understanding the present invention and is not used to limit the present invention. Any person skilled in the art in the technical field to which the present invention pertains, without departing from the spirit and scope disclosed by the present invention, can make any modifications and changes in the form and details of the embodiments. However, the scope of patent protection of the present invention shall still be subject to the scope defined by the appended 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; 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; an atomization treatment device, the atomization treatment device is connected to the inner cavity of the second heat exchanger, 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, the drainage channel is used to introduce part of the flue gas before flowing into the second heat exchanger into the atomization treatment device; the drainage channel is formed in a drainage component, the drainage component is at least partially arranged in the second heat exchanger inner cavity, a heat exchange component for circulating water is arranged in the second heat exchanger inner cavity, the drainage component includes a first pipe body, the first pipe 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, the exhaust port is connected to the accommodating chamber of the atomization treatment device, when the gas water heater is in operation, part of the flue gas upstream of the second heat exchanger enters the first pipe body, and the flue gas entering the first pipe body flows into the accommodating chamber of the atomization treatment device after passing through the first pipe body; The atomizing treatment device 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 atomizing treatment device; The gas water heater also includes an outlet channel, which is formed in an outlet component. The outlet component at least partially passes through the inner cavity of the second heat exchanger, the inlet of the outlet component is connected to the accommodating cavity of the atomizing treatment device, and the outlet of the outlet component extends to the smoke exhaust pipe; the outlet component is used to guide the condensed water mist generated in the atomizing treatment device and the smoke introduced into the accommodating cavity of the atomizing treatment device through the drainage channel out of the accommodating cavity and guide them to the smoke exhaust pipe.

2. The gas water heater according to claim 1, 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.

3. The gas water heater according to claim 2, 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.

4. The gas water heater according to claim 3, characterized in that: The position of the condensed water inlet is lower than the position of the flue gas inlet in the height direction.

5. The gas water heater according to claim 2, characterized in that: The atomization treatment device comprises an atomization module, and the atomization module is arranged at the lower part of the shell.

6. The gas water heater according to claim 2, 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.

7. The gas water heater according to claim 6, characterized in that: In the height direction, the preset water level is lower than the position of the exhaust port of the guide component.

8. The gas water heater according to claim 3, 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.

9. The gas water heater according to claim 3, 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.

10. 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.

11. The gas water heater according to claim 10, 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.

12. The gas water heater according to claim 1, 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.

13. The gas water heater according to claim 1, characterized in that: The exhaust port extends into the accommodating chamber of the atomization treatment device.

14. The gas water heater according to claim 1, characterized in that: The outlet component includes a second tube body, and the outlet channel is arranged in the second tube body.

15. The gas water heater according to claim 5, characterized in that: The atomization module is an ultrasonic generator.

16. The gas water heater according to claim 1, 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.

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