Condensation type gas water heater

Abstract

The utility model discloses a condensation type gas water heater which comprises a water heater body. The smoke exhaust device comprises a collecting cover and an atomization module, the collecting cover is provided with a collecting cavity communicating with the water heater body and a smoke exhaust port communicating with the collecting cavity, and the collecting cavity is used for collecting smoke and condensate water generated in the running process of the water heater body; the atomization module is used for atomizing the condensed water in the collecting cavity; the collecting cavity is provided with a water outlet, and the water outlet is provided with a water drainage valve; and the fan is communicated with the water heater body and is used for driving airflow to flow to the smoke outlet through the water heater body and the collecting cavity. According to the technical scheme of the utility model, condensed water can be atomized and then discharged along with smoke, and the condensed water can be quickly discharged under the condition of incomplete atomization; condensed water is prevented from being accumulated in the water heater to cause corrosion.

Description

Technical Field

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

[0002] In the context of energy conservation and emission reduction, improving the energy efficiency of gas water heaters has become a trend in the industry. Traditional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of flue gas vaporization, but a large amount of condensed water will be generated in the process of utilizing the latent heat of flue gas vaporization. In related technologies, some condensing gas water heaters use atomization modules to atomize the condensed water and discharge it with the flue gas, but there may be incomplete atomization. When the water heater is not used for a long time, the accumulated condensed water will corrode the inside of the water heater, affecting the service life of the water heater. Utility Model Content

[0003] The main purpose of the utility model is to provide a condensing gas water heater, which aims to be able to atomize condensed water and discharge it with flue gas, and to quickly discharge the condensed water in the case of incomplete atomization, so as to prevent the accumulation of condensed water inside the water heater and corrosion.

[0004] To achieve the above-mentioned purpose, the condensing gas water heater proposed by the utility model comprises:

[0005] Water heater body;

[0006] A smoke exhaust device, comprising a collecting hood and an atomizing module, wherein the collecting hood has a collecting chamber connected to the water heater body and a smoke exhaust port connected to the collecting chamber, the collecting chamber is used to collect smoke and condensed water generated during the operation of the water heater body, and the atomizing module is used to atomize the condensed water in the collecting chamber; the collecting chamber has a drain port, and the drain port is provided with a drain valve; and

[0007] The fan is connected to the water heater body and is used to drive the air flow through the water heater body and the collecting chamber to flow to the smoke exhaust port.

[0008] In one embodiment, the water heater body includes a burner, a combustion chamber box and a heat exchanger arranged in sequence from top to bottom, the fan is arranged on the top of the burner, the air outlet of the fan is connected to the burner, the collecting chamber is located below the heat exchanger, and the top of the collecting chamber is open toward the heat exchanger.

[0009] In one embodiment, the collecting hood comprises:

[0010] A cover body, the collecting chamber is formed inside, and the cover body is located below the heat exchanger; and

[0011] A smoke exhaust pipe is located on one lateral side of the heat exchanger, a smoke inlet communicating with the collecting chamber is provided at the bottom of the smoke exhaust pipe, and the smoke exhaust port is provided at the top of the smoke exhaust pipe.

[0012] In one of the embodiments, the atomization module includes an atomization element for atomizing condensed water, and the atomization element is located in the collection chamber and opposite to the smoke inlet.

[0013] In one of the embodiments, one end of the smoke exhaust pipe provided with the smoke inlet is expanded toward the collecting chamber.

[0014] In one of the embodiments, the collecting chamber has a guide surface facing the heat exchanger, and the guide surface is inclined and extends from top to bottom toward a side close to the smoke exhaust pipe.

[0015] In one embodiment, the collection chamber comprises:

[0016] A first cavity is located below the heat exchanger; and

[0017] A second cavity is located below the smoke exhaust pipe and connects the smoke inlet with the first cavity;

[0018] The bottom wall of the second cavity is lower than the bottom wall of the first cavity; and the atomization module is disposed in the second cavity.

[0019] In one embodiment, the collecting chamber also has a third cavity located below the first cavity, the first cavity has a first connecting port connected to the second cavity, and a second connecting port connected to the third cavity, the first connecting port is arranged higher than the second connecting port, the third cavity and the second cavity are arranged side by side in the transverse direction and separated by a partition, and a connecting area connecting the third cavity with the second cavity is formed on the bottom side of the partition.

[0020] In one embodiment, a water outlet is provided at the portion where the bottom wall of the second cavity is connected to the bottom wall of the third cavity, a drain pipe extending downward is provided at the water outlet, the drain outlet is provided at the bottom of the drain pipe, the partition extends from the middle of the water outlet to the drain pipe, and the partition and the drain outlet are spaced to form the connecting area.

[0021] In one embodiment, the smoke exhaust device also includes a liquid level detection module, which is used to detect the liquid level in the collecting chamber; the atomization module is used to open when the liquid level in the collecting chamber reaches a first preset liquid level, and is used to close when the liquid level in the collecting chamber reaches a second preset liquid level; wherein the first preset liquid level is higher than the second preset liquid level, and the second preset liquid level is higher than the atomization module.

[0022] In one embodiment, the liquid level detection module includes:

[0023] a first detection element, disposed at the first preset liquid level, for detecting whether the liquid level in the collecting chamber reaches the first preset liquid level; and

[0024] The second detection element is disposed at the second preset liquid level to detect whether the liquid level in the collecting chamber reaches the second preset liquid level.

[0025] When the condensing gas water heater of the utility model is working, driven by the fan, the high-temperature flue gas generated by the water heater body passes through the collection chamber and is discharged from the exhaust port. The condensed water generated during the operation of the water heater body can drip into the collection chamber under the action of gravity and gather. When the condensing gas water heater is working normally, the drain port is closed through the drain valve, and the condensed water in the collection chamber is atomized by the atomization module and then discharged with the flue gas. When the condensing gas water heater is not used for a long time, the drain port can be opened through the drain valve, and the condensed water in the collection chamber can be discharged from the drain port to avoid corrosion to the collection chamber. In this way, not only can the condensed water be atomized and discharged with the flue gas, but also the condensed water can be quickly discharged in the case of incomplete atomization to prevent the accumulation of condensed water inside the water heater and corrosion, thereby extending the service life of the water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 This is a schematic structural diagram of an embodiment of the utility model condensing gas water heater;

[0028] Figure 2 This is a structural schematic diagram of another embodiment of the condensing gas water heater of the utility model;

[0029] Figure 3 for Figure 2 Schematic diagram of flue gas flow when the condensing gas water heater is working;

[0030] Figure 4 It is a structural schematic diagram of an embodiment of a smoke exhaust device of a condensing gas water heater of the utility model;

[0031] Figure 5 for Figure 4 Schematic cross-sectional view of the smoke exhaust device.

[0032] Description of Figure Numbers:

[0033]

[0034]

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0039] In the context of energy conservation and emission reduction, improving the energy efficiency of gas water heaters has become a trend in the industry. Traditional condensing gas water heaters generally achieve high energy efficiency by utilizing the latent heat of flue gas vaporization, but a large amount of condensed water will be generated in the process of utilizing the latent heat of flue gas vaporization. In related technologies, some condensing gas water heaters use atomization modules to atomize the condensed water and discharge it with the flue gas, but there may be incomplete atomization. When the water heater is not used for a long time, the accumulated condensed water will corrode the inside of the water heater, affecting the service life of the water heater.

[0040] Based on this, the utility model proposes a condensing gas water heater, which can atomize condensed water and discharge it with the flue gas, and can quickly discharge the condensed water when the atomization is incomplete, so as to prevent the accumulation of condensed water inside the water heater and cause corrosion, thereby improving the service life of the water heater.

[0041] Please refer to Figures 1 to 5 In one embodiment of the utility model, the condensing gas water heater comprises a water heater body 10, a smoke exhaust device 20 and a fan 30. The smoke exhaust device 20 comprises a collecting hood 21 and an atomizing module 22. The collecting hood 21 has a collecting chamber 201 connected to the water heater body 10 and a smoke exhaust port 204 connected to the collecting chamber 201. The collecting chamber 201 is used to collect smoke and condensed water generated during the operation of the water heater body 10. The atomizing module 22 is used to atomize the condensed water in the collecting chamber 201. The collecting chamber 201 has a drain port 205, and a drain valve is provided at the drain port 205. The fan 30 is connected to the water heater body 10, and the fan 30 is used to drive the airflow through the water heater body 10 and the collecting chamber 201 to flow to the smoke exhaust port 204.

[0042] In this embodiment, the condensing gas water heater can be a strong-drum gas water heater or a strong-extraction gas water heater. The following mainly takes the strong-extraction gas water heater as an example. Among them, the water heater body 10 is the main component for realizing combustion and heat exchange. The water heater body 10 can specifically include a burner 11, a heat exchanger 12, and a combustion chamber box 13 that connects the burner 11 with the heat exchanger 12. When the condensing gas water heater is working, driven by the fan 30, the high-temperature flue gas generated by the combustion of the burner 11 is transported to the heat exchanger 12 through the flue inside the combustion chamber box 13, and the high-temperature flue gas exchanges heat with the heat exchanger 12 to heat the water in the heat exchange tube of the heat exchanger 12. The flue gas after heat exchange is discharged from the exhaust port 204 after passing through the collection chamber 201. Condensed water will be generated during the operation of the water heater body 10 (for example, condensed water will be generated on the surface of the heat exchanger 12 after heat exchange with the flue gas, or other parts with lower temperature inside the water heater body 10 will contact with the flue gas to generate condensed water). Since the collecting chamber 201 is connected to the water heater body 10, the condensed water generated during the operation of the water heater body 10 can enter the collecting chamber 201 and collect. The condensed water in the collecting chamber 201 is atomized by the atomizing module 22, so that the atomized condensed water can be discharged from the smoke exhaust port 204 along with the flue gas. In this way, the condensed water can be discharged without an external drain pipe, which can improve the installation convenience of the condensing gas water heater, and the appearance integrity of the whole machine can be improved without an external drain pipe, so that the appearance quality of the whole machine is better, and the whole machine is more beautiful. Among them, the atomizing module 22 can realize atomization by ultrasonic atomization, jet atomization, vibrating sieve atomization and other methods.

[0043] It is understandable that, in practical applications, a small amount of condensed water in the collection chamber 201 may remain due to incomplete atomization. When the condensing gas water heater is not used for a long time, the residual condensed water may corrode the collection chamber 201 due to its acidity. Based on this, in the present technical solution, the collection chamber 201 has a drain port 205, and a drain valve (not shown) is provided at the drain port 205. The drain valve is used to open or close the drain port 205. When the condensing gas water heater is working normally, the drain port 205 is closed by the drain valve, and the condensed water in the collection chamber 201 is atomized by the atomization module 22 and then discharged with the flue gas. When the condensing gas water heater is not used for a long time, the drain port 205 can be opened by the drain valve, and the condensed water in the collection chamber 201 can be discharged from the drain port to avoid corrosion to the collection chamber 201. Among them, the drain valve can be a mechanical valve or a solenoid valve. In addition, in order to facilitate the smooth discharge of condensed water, optionally, the drain port 205 is located at the lowest position at the bottom of the collection chamber 201.

[0044] like Figures 1 to 3As shown, in one embodiment, the water heater body 10 includes a burner 11, a combustion chamber box 13 and a heat exchanger 12 arranged in sequence from top to bottom, the fan 30 is arranged on the top of the burner 11, and the air outlet of the fan 30 is connected to the burner 11. The collecting chamber 201 is located below the heat exchanger 12, and the top of the collecting chamber 201 is open toward the heat exchanger 12.

[0045] In this embodiment, the condensing gas water heater specifically relates to a strong drum type gas water heater with inverted combustion. The fan 30, the burner 11, the combustion chamber box 13 and the heat exchanger 12 are arranged from top to bottom along the height direction of the water heater body 10. Among them, the air outlet of the fan 30 is connected to the burner 11. On the one hand, the fan 30 can provide the burner 11 with secondary air required for combustion to ensure more complete combustion; on the other hand, it can drive the high-temperature flue gas generated by the combustion of the burner 11 to flow from top to bottom. Specifically, as Figure 3 As shown, when the condensing gas water heater is in operation, driven by the fan 30, the high-temperature flue gas generated by the combustion of the burner 11 flows downward along the combustion chamber box 13 to the heat exchanger 12, and the high-temperature flue gas exchanges heat with the heat exchanger 12 to heat the water flow inside the heat exchanger 12. The flue gas after heat exchange further flows downward to the collection chamber 201 located below the heat exchanger 12, and is finally discharged from the exhaust port 204. After the heat exchange of the heat exchanger 12, condensed water will be generated on its surface, and the condensed water will drip into the collection chamber 201 under the action of gravity. The condensed water is atomized by the atomizing element 221 in the collection chamber 201, so that the atomized condensed water can be discharged from the exhaust port 204 together with the flue gas. Driven by the fan 30, the flue gas in the flue 13 flows downward, and the flow direction of the flue gas is consistent with the dripping direction of the condensed water on the surface of the heat exchanger 12. The flue gas can blow faster to drip the condensed water, thereby preventing a large amount of condensed water from adhering to the surface of the heat exchanger 12 to form a water film and affecting the heat exchange efficiency. In this way, the heat exchange efficiency of the condensing gas water heater can be improved.

[0046] Please combine Figure 1 , Figure 4 and Figure 5 In one embodiment, the collecting hood 21 includes a hood body 211 and a smoke exhaust pipe 212, the hood body 211 is located below the heat exchanger 12, the smoke exhaust pipe 212 is located on one lateral side of the heat exchanger 12, the collecting chamber 201 is formed inside the hood body 211, the top of the collecting chamber 201 is open, a smoke exhaust channel 202 is formed inside the smoke exhaust pipe 212, a smoke inlet 203 connected to the collecting chamber 201 is provided at the bottom of the smoke exhaust pipe 212, and the smoke exhaust port 204 is provided at the top of the smoke exhaust pipe 212.

[0047] In this embodiment, driven by the fan 30, the smoke and condensed water generated by the water heater body 10 can first flow downward into the collection chamber 201, and after the condensed water in the collection chamber 201 is atomized by the atomization module 22, it can flow into the exhaust channel 202 of the exhaust pipe 212 together with the smoke, and then flow upward along the exhaust channel 202 to the exhaust port 204 for discharge. Among them, the cover body 211 and the exhaust pipe 212 can be assembled and connected as two independent components, or the cover body 211 and the exhaust pipe 212 can also be integrally formed. For example, the cover body 211 and the exhaust pipe 212 can be assembled and connected by screws or flanges. For another example, the cover body 211 and the exhaust pipe 212 can be integrally stretched and formed by sheet metal. The exhaust pipe 212 can be set as a straight pipe or a curved pipe according to actual needs. Optionally, the smoke exhaust pipe 212 is a straight pipe extending vertically, so that a vertically extending smoke exhaust channel 202 is formed inside the smoke exhaust pipe 212, so that the smoke exhaust resistance can be reduced, and the smoke exhaust pipe 212 is arranged in a straight pipe, which can be better adapted to the space inside the condensing gas water heater casing 40 for installation, saving installation space. For example, in actual application, the water heater body 10 and the smoke exhaust device 20 are both accommodated in the casing 40, the cover body 211 is installed at the bottom of the water heater body 10, and the smoke exhaust pipe 212 is arranged side by side on one side of the width direction of the water heater body 10, for example, the smoke exhaust pipe 212 can be arranged on the left or right side of the water heater body 10. Optionally, the top of the smoke exhaust pipe 212 can pass through the top of the casing 40 so as to be connected to an external smoke exhaust pipe. In order to facilitate the assembly of the cover body 211 and the water heater body 10, optionally, the top of the cover body 211 is provided with a connecting portion 214 for positioning and connecting with the water heater body 10.

[0048] like Figure 5 As shown, in one embodiment, the atomizing module 22 includes an atomizing element 221 for atomizing condensed water, and the atomizing element 221 is located in the collecting chamber 201 and opposite to the smoke inlet 203. In this embodiment, the atomizing element 221 is arranged opposite to the smoke inlet 203 of the smoke exhaust pipe 212, so that the atomized condensed water can enter the smoke exhaust channel 202 of the smoke exhaust pipe 212 more smoothly along with the smoke, further improving the condensed water discharge efficiency. Optionally, the atomizing element 221 adopts an ultrasonic atomizing sheet, which has a simple structure, occupies a small volume, and can also achieve a good atomization effect.

[0049] Specifically, Figure 5As shown, the atomizing module 22 may include a base 222 and an atomizing element 221 disposed on the base 222, a mounting port is provided at the bottom of the collecting hood 21, the base 222 is disposed on the outside of the mounting port, and the atomizing element 221 is placed in the collecting chamber 201 from the mounting port. Optionally, the atomizing module 22 is detachably connected to the collecting hood 21, so that the disassembly and maintenance of the atomizing module 22 can be facilitated. For example, the base 222 can be connected and fixed to the collecting hood 21 by fasteners (such as screws, bolts, etc.). Specifically, the base 222 can be set as a square seat, and the four corners of the base 222 are connected and fixed to the collecting hood 21 by fasteners. Among them, the number of atomizing modules 22 can be set to one, two, three or more according to actual needs. In order to ensure the atomization effect, the total atomization capacity of all atomizing modules 22 should generally be higher than the maximum condensed water generation in the whole machine working condition. Optionally, a plurality of atomizing modules 22 are provided to improve the atomization efficiency. For example, in the present embodiment, two atomizing modules 22 are provided.

[0050] like Figure 5 As shown, in one embodiment, the end of the smoke exhaust pipe 212 provided with the smoke inlet 203 is expanded toward the collecting chamber 201. In this way, a larger space is formed at the junction of the collecting chamber 201 and the smoke exhaust pipe 212, which is conducive to increasing the atomization space and improving the atomization effect.

[0051] like Figure 5 As shown, in one embodiment, the smoke exhaust pipe 212 includes an introduction section 212a and a smoke exhaust section 212b which are interconnected, the introduction section 212a is arranged at the top of the cover body 211, the smoke exhaust section 212b is extended upward from the top of the introduction section 212a, the top of the smoke exhaust section 212b is provided with the smoke exhaust port 204, and the inner diameter of the introduction section 212a is gradually expanded toward the collection chamber 201.

[0052] In this embodiment, the introduction section 212a is in the shape of a trumpet that gradually expands toward the collection chamber 201, and the smoke exhaust section 212b is in the shape of a straight cylinder that extends vertically. The expanded end of the introduction section 212a is connected to the cover body 211, and the smoke exhaust section 212b is connected to the narrow end of the introduction section 212a. The inner diameter of the introduction section 212a is gradually expanded toward the collection chamber 201, which is conducive to increasing the atomization space and guiding the smoke, so that the atomized condensed water can enter the smoke exhaust channel 202 more smoothly along with the smoke.

[0053] like Figure 1 and Figure 5As shown, in one embodiment, the collection chamber 201 has a guide surface 2111 facing the heat exchanger 12, and the guide surface 2111 is inclined and extended from top to bottom toward a side close to the exhaust pipe 212. In this embodiment, by setting the guide surface 2111, it is more conducive to guiding the smoke to the exhaust pipe 212, thereby improving the smoothness of smoke discharge. And the condensed water dripping from the surface of the heat exchanger 12 can also be guided by the guide surface 2111 to the bottom of the collection chamber 201. Among them, the guide surface 2111 can be specifically set as an inclined plane or an inclined arc surface. Optionally, the atomizer 221 is located below the exhaust channel 202, so that the condensed water can be better guided to flow to the location of the atomizer 221 through the guide surface 2111, which is conducive to the full atomization of the condensed water.

[0054] like Figure 5 As shown, in one embodiment, the collecting chamber 201 has a first cavity 201a and a second cavity 201b which are interconnected, the first cavity 201a is located below the heat exchanger 12, the second cavity 201b is located below the smoke exhaust channel 202, the top of the second cavity 201b is connected to the smoke inlet 203, the bottom wall of the first cavity 201a is higher than the bottom wall of the second cavity 201b, and the atomization module 22 is arranged in the second cavity 201b.

[0055] In this embodiment, the top of the first cavity 201a is open, and the top of the first cavity 201a is open toward the heat exchanger 12. The flue gas in the flue 13 of the water heater body 10 flows downward to the first cavity 201a after heat exchange with the heat exchanger 12, and then enters the second cavity 201b from the first cavity 201a, and then flows from the smoke inlet 203 to the smoke exhaust channel 202, and finally discharged from the smoke exhaust port 204. In this process, the condensed water on the surface of the heat exchanger 12 drips into the first cavity 201a under the action of gravity. Since the bottom wall of the first cavity 201a is higher than the bottom wall of the second cavity 201b, it is more conducive to the condensed water in the first cavity 201a to flow to the second cavity 201b under the action of gravity. The atomization module 22 includes an atomization element 221 disposed in the second cavity 201b, and the condensed water is atomized by the atomization element 221 to form atomized condensed water. Since the second cavity 201 b is located below the smoke exhaust passage 202 , the atomized condensed water can be smoothly discharged from the smoke exhaust passage 202 along with the smoke.

[0056] Furthermore, if Figure 5As shown, the collecting chamber 201 also has a third chamber 201c located below the first chamber 201a, the first chamber 201a has a first connecting port 2011 connected to the second chamber 201b, and a second connecting port 2012 connected to the third chamber 201c, the first connecting port 2011 is arranged higher than the second connecting port 2012, the third chamber 201c and the second chamber 201b are arranged side by side in the horizontal direction and are separated by a partition 2112, and a connecting area connecting the third chamber 201c with the second chamber 201b is formed on the bottom side of the partition 2112.

[0057] In this embodiment, the collecting chamber 201 is divided into three areas: a first chamber 201a, a second chamber 201b, and a third chamber 201c. The side wall of the first chamber 201a is provided with a first connecting port 2011, and the bottom wall of the first chamber 201a is provided with a second connecting port 2012. The position of the first connecting port 2011 is higher than that of the second connecting port 2012. In this way, after the flue gas after heat exchange by the heat exchanger 12 enters the first chamber 201a, it can more easily enter the second chamber 201b from the first connecting port 2011, and then be discharged from the exhaust channel 202, so that the flow of the flue gas is smoother. The condensed water generated on the surface of the heat exchanger 12 drips into the first chamber 201a under the action of gravity, and can more easily be collected into the third chamber 201c from the second connecting port 2012, and then flow from the third chamber 201c to the second chamber 201b for atomization. Since the third cavity 201c is separated from the second cavity 201b by the partition 2112, a connecting area is formed on the bottom side of the partition 2112 to connect the third cavity 201c with the second cavity 201b, so that the condensed water dripping from the surface of the heat exchanger 12 can first be naturally precipitated in the third cavity 201c to precipitate the impurities in the condensed water, and the condensed water after precipitation and purification flows through the connecting area to the second cavity 201b for atomization, which can prevent the impurities in the condensed water from covering the atomizing element 221 and affecting the atomization effect, and can also extend the service life of the atomizing element 221. There are many ways to form the connecting area. For example, the connecting area can be a connecting port opened on the partition 2112, and for another example, the connecting area can be formed by the gap between the bottom side of the partition 2112 and the drain port 205. Optionally, the first cavity 201a is provided with a guide surface 2111 which extends obliquely from top to bottom toward the second connecting port 2012 , so that the condensed water in the first cavity 201a can be guided more smoothly into the third cavity 201c under the action of the guide surface 2111 .

[0058] Furthermore, if Figure 5As shown, in one embodiment, a water outlet is provided at the portion where the bottom wall of the second cavity 201b and the bottom wall of the third cavity 201c meet, a drain pipe 213 extending downward is provided at the periphery of the water outlet, the drain outlet 205 is provided at the bottom of the drain pipe 213, the partition 2112 extends from the middle of the water outlet to the inside of the drain pipe 213, and the partition 2112 and the drain outlet 205 are spaced apart to form the connecting area.

[0059] In this embodiment, the partition 2112 extends from the middle of the water outlet to the drain pipe 213, so that the first flow channel 213a and the second flow channel 213b are formed on opposite sides of the partition 2112 in the drain pipe 213. The water outlet can be divided into two halves by the partition 2112, one half of which connects the third cavity 201c with the first flow channel 213a, and the other half of the water outlet connects the second cavity 201b with the second flow channel 213b. The partition 2112 and the drain port 205 are separated to form a connecting area, and the bottom end of the first flow channel 213a is connected to the second flow channel 213b through the connecting area. In this way, the first flow channel 213a, the connecting area and the second flow channel 213b are connected in sequence to form a U-shaped flow channel structure. When the condensing gas water heater is working normally, the drain valve closes the drain port 205, and the condensed water in the first cavity 201a first enters the third cavity 201c, so that the impurities in the condensed water naturally settle in the third cavity 201c, and the purified condensed water flows into the second cavity 201b through the first flow channel 213a, the connecting area, and the second flow channel 213b, and then the condensed water is atomized by the atomizer 221 in the second cavity 201b. When the condensing gas water heater is not used for a long time, the drain port 205 can be opened through the drain valve to discharge the condensed water and impurities from the drain port 205.

[0060] On the basis of the above embodiments, in one embodiment, the smoke exhaust device 20 also includes a liquid level detection module, which is used to detect the liquid level in the collection chamber 201, and the atomization module 22 is used to open when the liquid level in the collection chamber 201 reaches a first preset liquid level, and is used to close when the liquid level in the collection chamber 201 reaches a second preset liquid level; wherein the first preset liquid level is higher than the second preset liquid level, and the second preset liquid level is higher than the atomization module 22.

[0061] In this embodiment, the liquid level detection module and the atomization module 22 can be electrically connected to the controller of the condensing gas water heater respectively. When the liquid level detection module detects that the liquid level in the collection chamber 201 reaches the first preset liquid level, the first signal is sent to the controller. The controller controls the atomization module 22 to turn on according to the first signal, and then the condensed water in the collection chamber 201 can be atomized by the atomization module 22, so that the atomized condensed water is discharged with the flue gas. In this way, the atomization function can be turned on in time when the condensed water level in the collection chamber 201 is high, so as to avoid the liquid level being too high and affecting the normal discharge of flue gas. When the liquid level detection module detects that the liquid level in the collection chamber 201 reaches the second preset liquid level, the second signal is sent to the controller, and the controller controls the atomization module 22 to turn off according to the second signal and stop atomization. In this way, the atomization function can be turned off in time when the condensed water level in the collection chamber 201 is low, so as to prevent the atomization module 22 from being damaged by dry burning. The liquid level detection module may be a contact type liquid level detection module (eg, a pressure differential liquid level sensor, a float type liquid level sensor, etc.) or a non-contact type liquid level detection module (eg, an ultrasonic liquid level sensor, a laser liquid level sensor, etc.).

[0062] like Figure 2 As shown, in one embodiment, the liquid level detection module includes a first detection element 23 disposed at the first preset liquid level, and a second detection element 24 disposed at the second preset liquid level, the first detection element 23 is used to detect whether the liquid level in the collecting chamber 201 reaches the first preset liquid level, and the second detection element 24 is used to detect whether the liquid level in the collecting chamber 201 reaches the second preset liquid level. In this way, when the first detection element 23 detects that the liquid level in the collecting chamber 201 reaches the first preset liquid level, a first signal is sent to the controller, and the controller controls the atomization module 22 to open according to the first signal, and then the condensed water in the collecting chamber 201 can be atomized by the atomization module 22, so that the atomized condensed water is discharged with the smoke. When the second detection element 24 detects that the liquid level in the collecting chamber 201 reaches the second preset liquid level, a second signal is sent to the controller, and the controller controls the atomization module 22 to close according to the second signal to stop atomization. Among them, the first detection element 23 and the second detection element 24 can adopt contact liquid level sensors (such as differential pressure liquid level sensors, float liquid level sensors, etc.).

[0063] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A condensing gas water heater, characterized in that: include: Water heater body; A smoke exhaust device, comprising a collecting hood and an atomizing module, wherein the collecting hood has a collecting chamber connected to the water heater body and a smoke exhaust port connected to the collecting chamber, the collecting chamber is used to collect smoke and condensed water generated during the operation of the water heater body, and the atomizing module is used to atomize the condensed water in the collecting chamber; the collecting chamber has a drain port, and the drain port is provided with a drain valve; and The fan is connected to the water heater body and is used to drive the air flow through the water heater body and the collecting chamber to flow to the smoke exhaust port.

2. The condensing gas water heater according to claim 1, characterized in that: The water heater body includes a burner, a combustion chamber box and a heat exchanger which are arranged in sequence from top to bottom. The fan is arranged on the top of the burner, and the air outlet of the fan is connected to the burner. The collecting chamber is located below the heat exchanger, and the top of the collecting chamber is open toward the heat exchanger.

3. The condensing gas water heater according to claim 2, characterized in that: The collecting hood comprises: A cover body, the collecting chamber is formed inside, and the cover body is located below the heat exchanger; and A smoke exhaust pipe is located on one lateral side of the heat exchanger, a smoke inlet communicating with the collecting chamber is provided at the bottom of the smoke exhaust pipe, and the smoke exhaust port is provided at the top of the smoke exhaust pipe.

4. The condensing gas water heater according to claim 3, characterized in that: The atomization module comprises an atomization element for atomizing condensed water, and the atomization element is located in the collection chamber and opposite to the smoke inlet.

5. The condensing gas water heater according to claim 3, characterized in that: The end of the smoke exhaust pipe provided with the smoke inlet is expanded toward the collecting chamber.

6. The condensing gas water heater according to claim 3, characterized in that: The collecting chamber has a flow guiding surface facing the heat exchanger, and the flow guiding surface is inclined and extends from top to bottom toward a side close to the smoke exhaust pipe.

7. The condensing gas water heater according to claim 3, characterized in that: The collecting chamber comprises: A first cavity is located below the heat exchanger; and A second cavity is located below the smoke exhaust pipe and connects the smoke inlet with the first cavity; The bottom wall of the second cavity is lower than the bottom wall of the first cavity; and the atomization module is disposed in the second cavity.

8. The condensing gas water heater according to claim 7, characterized in that: The collecting chamber also has a third cavity located below the first cavity, the first cavity has a first connecting port connected to the second cavity, and a second connecting port connected to the third cavity, the first connecting port is arranged higher than the second connecting port, the third cavity and the second cavity are arranged side by side in the transverse direction and separated by a partition, and a connecting area connecting the third cavity with the second cavity is formed on the bottom side of the partition.

9. The condensing gas water heater according to claim 8, characterized in that: A water outlet is provided at the portion where the bottom wall of the second cavity is connected to the bottom wall of the third cavity, and a drain pipe extending downward is provided at the water outlet. The drain outlet is provided at the bottom of the drain pipe, and the partition extends from the middle of the water outlet to the drain pipe, and the partition and the drain outlet are spaced to form the connecting area.

10. The condensing gas water heater according to any one of claims 1 to 9, characterized in that: The smoke exhaust device also includes a liquid level detection module, which is used to detect the liquid level in the collecting chamber; the atomization module is used to open when the liquid level in the collecting chamber reaches a first preset liquid level, and is used to close when the liquid level in the collecting chamber reaches a second preset liquid level; wherein the first preset liquid level is higher than the second preset liquid level, and the second preset liquid level is higher than the atomization module.

11. The condensing gas water heater according to claim 10, characterized in that: The liquid level detection module comprises: a first detection element, disposed at the first preset liquid level, for detecting whether the liquid level in the collecting chamber reaches the first preset liquid level; and The second detection element is disposed at the second preset liquid level to detect whether the liquid level in the collecting chamber reaches the second preset liquid level.

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