Condensing heat exchange device and gas water heater thereof

Abstract

The utility model discloses a kind of condensing heat exchange device and gas water heater thereof, condensing heat exchange device includes: shell assembly, with atomization cavity and condensing cavity, on the shell assembly is equipped with the condensing cavity of even intercommunication inlet, exhaust port and condensate water outlet, on the shell assembly is equipped with the condensing water inlet and gas outlet of intercommunication atomization cavity, the condensing water inlet intercommunication condensate water outlet, the gas outlet intercommunication exhaust port or the condensing cavity upper end;Heat exchange component, including the heat exchange pipe of being arranged in the condensing cavity;Atomization component, be arranged in the atomization cavity, for the condensate water atomization in the atomization cavity.The utility model condensing heat exchange device, simple structure, realize to condensate water atomization discharge, solve condensate water drain pipe installation difficulty and the problem of affecting aesthetic appearance.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a condensing heat exchange device and its gas water heater. Background Technology

[0002] Existing condensing gas water heaters produce weakly acidic condensate during operation. This condensate contains components such as carbonic acid, nitrite, and sulfurous acid, which are corrosive. It needs to be collected using a condensate collection box, neutralized with alkaline filter media, and then discharged into the sewer via the pre-installed drain pipe in the user's home. The installation of the condensate drain pipe affects the aesthetics of the water heater.

[0003] For users whose homes do not have a pre-installed drain pipe, they may choose to drain the condensate to the balcony, but this not only affects the aesthetics of the water heater but also causes water to drip from a height. Alternatively, they may choose to install a water collection box on the outside of the water heater and manually empty the condensate from the box periodically, which is inconvenient. Therefore, there is an urgent need for a condensation heat exchange device to solve the above problems. Summary of the Invention

[0004] This utility model aims to at least partially solve one of the problems existing in the prior art. To this end, this utility model proposes a condensation heat exchange device with a simple structure that achieves atomized discharge of condensate, solving the problems of difficult installation and unsightly impact of condensate drain pipes. This utility model also provides a gas water heater.

[0005] The condensation heat exchange device provided above is achieved through the following technical solution:

[0006] A condensation heat exchange device includes: a shell assembly having an atomizing chamber and a condensing chamber, the condensing chamber being located around the atomizing chamber, or the condensing chamber and the atomizing chamber being arranged side by side; the shell assembly having a flue gas inlet, a flue gas outlet, and a condensate outlet all communicating with the condensing chamber; the shell assembly also having a condensate inlet and an air outlet communicating with the atomizing chamber, the condensate inlet communicating with the condensate outlet, and the air outlet communicating with the flue gas outlet or the upper end of the condensing chamber; a heat exchange assembly including a heat exchange tube disposed within the condensing chamber; and an atomizing assembly disposed within the atomizing chamber for atomizing the condensate within the atomizing chamber.

[0007] In some embodiments, the smoke inlet is located on the side wall or bottom of the housing assembly, and the smoke outlet is located on the top of the housing assembly; the air outlet is located on the top of the atomizing chamber, and a mixing hole is provided on the side wall of the atomizing chamber that is higher than the smoke inlet and communicates with the condensation chamber.

[0008] In some embodiments, the housing assembly includes an outer shell and a top cover, the top cover being mounted on the top of the outer shell and having the exhaust port thereon, a partition integrally formed within the outer shell to divide the interior of the outer shell into the atomizing chamber and the condensing chamber arranged side by side, the exhaust port, the condensate outlet and the condensate inlet being provided on the outer shell, and the heat exchange tubes being arranged in a folded manner within the condensing chamber.

[0009] In some embodiments, an air outlet communicating with the atomizing chamber is formed between the top of the partition and the upper cover, and a mixing hole communicating with the condensation chamber and the atomizing chamber is provided at the upper end of the partition.

[0010] In some embodiments, the housing assembly includes an outer shell, a top cover, and an inner shell. The top cover is mounted on the top of the outer shell and has the exhaust port thereon. The inner shell is disposed within the outer shell and has an atomizing chamber and a condensate inlet. The condensate inlet passes through the mounting opening of the outer shell. A condensation chamber is formed between the inner shell and the outer shell. The exhaust port and the condensate outlet are provided on the outer shell. The heat exchange tube is disposed within the condensation chamber and is arranged in a spiral pattern along the atomizing chamber.

[0011] In some embodiments, the top of the inner housing is open to form the air outlet, and a plurality of mixing holes arranged circumferentially and communicating with the condensation chamber are provided on the upper end of the side wall of the inner housing.

[0012] In some embodiments, the atomizing assembly is provided with a misting plate and a detection switch, the detection switch being used to detect the level of condensate in the atomizing chamber.

[0013] In some embodiments, the condensate outlet is selectively connected to the condensate inlet or a condensate collector via a three-way valve; or it may further include a filter assembly and a water pump, wherein the filter assembly's filter inlet is connected to the condensate outlet, and the filter assembly's filter outlet is connected to the condensate inlet via the water pump, wherein the filter assembly is used to filter and neutralize the condensate.

[0014] In some embodiments, the filtration assembly includes a filter housing, a neutralizing filter element, and a liquid level sensor. The filter housing has a cavity with a bottom opening, a water inlet at the top of the filter housing, and a water outlet at the lower end of the side wall of the filter housing. The neutralizing filter element is embedded in the cavity, with its top abutting against the top of the cavity and its bottom covering the bottom opening and detachably connected to the filter housing. A water storage chamber is formed between the outer wall of the neutralizing filter element and the side wall of the cavity. The water storage chamber is connected to the water inlet through the neutralizing filter element and to the water outlet. The liquid level sensor is disposed on the filter housing and is used to detect the liquid level in the cavity.

[0015] In some embodiments, a drain outlet is provided at the bottom of the filter assembly, and a plug or switch valve is provided at the drain outlet.

[0016] The gas water heater described above is achieved through the following technical solution:

[0017] A gas water heater includes: a water heater body, comprising a cold water pipe, a hot water pipe, a burner assembly, a flue gas assembly, and a water flow sensor, wherein the burner assembly has a heat exchanger, the flue gas assembly is disposed on top of the burner assembly, and the water flow sensor is disposed on the cold water pipe; a condensing heat exchange device as described above, wherein the condensing heat exchange device is disposed within the water heater body, the flue gas inlet is connected to the flue gas outlet of the flue gas assembly, the inlet of the heat exchange pipe is connected to the cold water pipe, and the outlet of the heat exchange pipe is connected to the hot water pipe through the heat exchanger; and a control component electrically connected to the burner assembly, the flue gas assembly, the water flow sensor, and the condensing heat exchange device.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The condensing heat exchange device of this utility model is provided with a condensing chamber and an atomizing chamber on the shell assembly. The condensate inlet of the atomizing chamber is connected to the condensate outlet of the condensing chamber, and both the atomizing chamber and the condensing chamber are connected to the exhaust port of the shell assembly. A heat exchange tube is provided in the condensing chamber and an atomizing component is provided in the atomizing chamber. The structure is simple and compact, realizing the atomization and discharge of condensate. There is no need to set up a separate condensate drain pipe, ensuring the appearance of the water heater and solving the problems of difficult installation and unsightly impact of condensate drain pipe.

[0020] 2. The condensate inlet of the atomizing chamber of this utility model is selectively connected to the condensate inlet or the condensate collector through a three-way valve, so as to enable the condensate in the shell assembly to be discharged after the atomizing component fails, ensuring that the water heater can still operate normally and output hot water.

[0021] 3. The condensate inlet of the atomizing chamber of this utility model is connected to the condensate inlet in sequence through the filter component and the water pump, so as to achieve the neutralization and purification of the condensate before atomization and discharge, preventing acidic condensate from damaging the atomizing component or being discharged outdoors with the flue gas. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the gas water heater in Embodiment 1 of this utility model;

[0023] Figure 2 This is a cross-sectional view of the shell assembly, heat exchange assembly, and atomizing assembly in Embodiment 1 of this utility model;

[0024] Figure 3 This is a cross-sectional view of another shell assembly, heat exchange assembly, and atomizing assembly in Embodiment 1 of this utility model;

[0025] Figure 4 This is a cross-sectional view of the water pump assembly and filter assembly in Embodiment 1 of this utility model. Figure 1 ;

[0026] Figure 5 This is a cross-sectional view of the water pump assembly and filter assembly in Embodiment 1 of this utility model. Figure 2 ;

[0027] Figure 6 This is a cross-sectional view of the condensation heat exchange device in Embodiment 2 of this utility model;

[0028] Figure 7 This is a flowchart of the control method for the water heater in Embodiment 3 of this utility model;

[0029] Figure 8 This is a flowchart of a control method for another water heater in Embodiment 4 of this utility model.

[0030] In the diagram: 1-Shell assembly, 101-Atomizing chamber, 102-Condensation chamber, 103-Condensate inlet, 104-Mixing port, 11-Outer shell, 111-Separator, 112-Smoke inlet, 113-Condensate outlet, 12-Top cover, 121-Smoke exhaust port, 13-Inner shell, 14-Three-way valve, 151-Condensate drain pipe, 152-Condensate inlet pipe; 21-Heat exchange tube; 3-Atomizing assembly, 31-Atomizing plate, 32-Detection switch; 4-Filter assembly, 41-Filter housing, 411-Filter water inlet, 412-Filter water outlet, 413-Water storage chamber, 414-Drain outlet, 415-Liquid seal structure, 42-Neutralizing filter element, 43-Liquid level sensor; 5-Water pump;

[0031] 6-Water heater body, 611-Cold water pipe, 612-Hot water pipe, 62-Burner assembly, 621-Heat exchanger, 63-Exhaust assembly, 64-Water flow sensor; 7-Control assembly. Detailed Implementation

[0032] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0033] Example 1

[0034] refer to Figure 1-3 This embodiment provides a condensation heat exchange device, including a housing assembly 1, a heat exchange assembly (not shown in the figure), and an atomizing assembly 3. The housing assembly 1 has an atomizing chamber 101 and a condensing chamber 102. The depth of the atomizing chamber 101 is not less than 100 mm to ensure the atomizing space of the atomizing assembly 3. The condensing chamber 102 is located around the atomizing chamber 101 (e.g., Figure 1-2 (as shown), or the condensation chamber 102 and the atomizing chamber 101 are arranged side by side in the left-right direction (as shown). Figure 3 (As shown in the figure). The housing assembly 1 is provided with a smoke inlet 112, a smoke outlet 121, and a condensate outlet 113, all of which are connected to the condensation chamber 102. The housing assembly 1 is also provided with a condensate inlet 103 and an air outlet (not shown in the figure), which are connected to the atomization chamber 101. The condensate inlet 103 is connected to the condensate outlet 113, and the air outlet can be directly connected to the smoke outlet 121. Alternatively, the air outlet can be directly connected to the upper end of the condensation chamber 102, in which case the air outlet is connected to the smoke outlet 121 through the upper end of the condensation chamber. Specifically, both the condensate outlet 113 and the condensate inlet 103 are located at the bottom of the housing assembly 1, and the condensate inlet 103 is designed as a quick-connect interface.

[0035] The heat exchange assembly includes a heat exchange tube 21, which is disposed within the condensing chamber 102. The two opposite inlets of the heat exchange tube 21 protrude from the outer casing assembly 1, respectively connecting to the cold water pipe 611 and the heat exchanger 621 of the gas water heater. Water flowing through the heat exchange tube 21 exchanges heat with the high-temperature flue gas flowing into the condensing chamber 102, preheating the water within the heat exchange tube 21. This facilitates rapid heating of the water outlet to a stable set temperature. During the heat exchange process, the high-temperature flue gas condenses to form condensate, which is then introduced into the atomizing chamber via the condensate outlet 113 and the condensate inlet 103. An atomizing assembly 3 is disposed within the atomizing chamber 101 to atomize the condensate within the chamber, allowing it to be discharged from the gas outlet as a water mist. This eliminates the need for a separate condensate drain pipe, ensuring the aesthetic appearance of the water heater and resolving the issues of difficult and unsightly condensate drain pipe installation.

[0036] refer to Figure 2-3Specifically, the smoke inlet 112 is located on the side wall or bottom of the housing assembly 1, the smoke outlet 121 is located on the top of the housing assembly 1, and the air outlet is located on the top of the atomizing chamber 101. Further, a mixing hole 104 communicating with the condensation chamber 102 is provided at the upper end of the side wall of the atomizing chamber 101. The mixing hole 104 is higher than the smoke inlet 112, allowing some high-temperature flue gas to flow into the upper part of the atomizing chamber 101 through the mixing hole 104, and then flow from the atomizing chamber to the smoke outlet 121. This facilitates the use of this flue gas to carry away the water mist generated in the atomizing chamber 101, improving the mist removal effect. It should be noted that a water vapor separator can be provided at the air outlet to reduce the water content of the flue gas flowing out of the air outlet.

[0037] Specifically, the specific structure of housing assembly 1 includes, but is not limited to, any of the following:

[0038] The first type, reference Figure 3 The housing assembly 1 includes an outer shell 11 and a top cover 12. The top cover 12 is mounted on the top of the outer shell 11 and the two are detachably and sealed together. An upwardly extending exhaust port 121 is provided on the top cover 12. An upwardly extending partition 111 is integrally formed inside the outer shell 11, dividing the interior of the outer shell 11 into a condensation chamber 102 and an atomizing chamber 101 arranged side-by-side in the left-right direction. An exhaust port 112 is provided on the side wall or bottom of the outer shell 11, and a condensate outlet 113 and a condensate inlet 103 are provided at the bottom of the outer shell. The heat exchange tubes 21 are arranged in a folded manner within the condensation chamber 102, which helps to reduce the space occupied by the heat exchange tubes 21 and the condensation chamber, making the overall size of the housing assembly 1 smaller, and also allows for the extension of the heat exchange pipeline, effectively improving the heat exchange effect. Furthermore, an air outlet communicating with the atomizing chamber 101 is formed between the top of the partition 111 and the upper cover 12, and a mixing hole 104 communicating with the condensation chamber 102 and the atomizing chamber 101 is provided at the upper end of the partition 111, so that the water mist can be carried away by the flue gas flowing into the atomizing chamber.

[0039] The second option is to refer to... Figure 1-2The housing assembly 1 includes an outer shell 11, a top cover 12, and an inner shell 13. The top cover 12 is mounted on the top of the outer shell 11 and the two are detachably and sealed together. An upwardly extending exhaust port 121 is provided on the top cover 12. The inner shell 13 is disposed within the outer shell 11 and has an atomizing chamber 101 and a condensate inlet 103. The condensate inlet 103 is designed at the bottom of the inner shell 13 and vertically passes through the mounting opening of the outer shell 11. This facilitates not only the limiting and fixing of the inner shell but also the connection of the condensate inlet 103 to the condensate outlet. A ring-shaped condensation chamber 102 is formed between the inner shell 13 and the outer shell 11. An exhaust port 112 is provided on the side wall or bottom of the outer shell 11, and a condensate outlet 113 is provided at the bottom of the outer shell. The heat exchange tube 21 is disposed within the condensation chamber 102 and spirals along the atomization chamber 101. This helps to further reduce the space occupied by the heat exchange tube 21 and the condensation chamber, making the overall size of the shell assembly 1 smaller. It also allows for the extension of the heat exchange pipeline, effectively improving the heat exchange effect. Furthermore, the top of the inner shell 13 is open to form an air outlet. Multiple mixing holes 104 are circumferentially spaced and connected to the condensation chamber 102 on the upper side wall of the inner shell 13. This allows more flue gas to flow into the atomization chamber, facilitating the rapid carrying of water mist by this flue gas and improving the mist removal effect.

[0040] refer to Figure 2-3 Specifically, the atomizing component 3 is located at the bottom of the atomizing chamber 101 and includes an atomizing plate 31 and a detection switch 32. The detection switch 32 is either an atomizing switch or a liquid level sensor 43, used to detect the condensate level in the atomizing chamber 101. When the atomizing component 3 is powered on, if the liquid level in the atomizing chamber 101 is higher than the detection switch 32, the atomizing function is activated, and the atomizing plate 31 oscillates at high frequency to convert the condensate into water mist. If the liquid level in the atomizing chamber 101 is lower than the detection switch 32, the atomizing function is automatically deactivated. More specifically, the distance between the atomizing plate 31 and the detection switch 32 is greater than 10 mm, and the distance between the atomizing plate 31 and the mixing hole 104 of the atomizing chamber 101 is less than 50 mm to ensure good atomization and demisting functions.

[0041] refer to Figure 1-5Furthermore, the condensing heat exchange device also includes a filter assembly 4 and a water pump 5. The water inlet of the filter assembly 4 is connected to the condensate outlet 113 through the condensate drain pipe 151, and the water outlet 412 of the filter assembly 4 is connected to the condensate inlet 103 through the water pump 5. The filter assembly 4 is used to filter and neutralize the condensate. When the high-temperature flue gas flows through the heat exchange tube 21, the acidic condensate generated by condensation flows into the filter assembly 4 through the condensate drain pipe 151 under the action of gravity. After being filtered and neutralized by the filter assembly 4, the acidity is reduced. The neutralized condensate is then pumped by the water pump 5 into the atomizing chamber 101. When the condensate level in the atomizing chamber is higher than the detection switch 32, the atomizing assembly is activated and converts the condensate into water mist. Some of the flue gas flows through the atomizing chamber and carries away the water mist, so there is no need to connect an external condensate drain pipe. Specifically, the water pump inlet of the water pump 5 is connected to the filter outlet 412 of the filter assembly 4, and the water pump outlet of the water pump 5 is connected to the condensate inlet 103 of the housing assembly 1 through the condensate inlet pipe 152. The water pump outlet of the water pump 5 is designed as a quick-connect plug, and a one-way valve is provided between the water pump 5 and the condensate inlet 103 to prevent condensate backflow.

[0042] refer to Figure 4-5 Specifically, the filter assembly 4 includes a filter housing 41, a neutralizing filter element 42, and a liquid level sensor 43. The filter housing 41 has a cavity with a bottom opening, a water inlet 411 at the top, and a water outlet 412 at the lower end of the side wall. The neutralizing filter element 42 is embedded in the cavity, with its top abutting the top of the cavity and its bottom covering the bottom opening and detachably connected to the filter housing 41. A water storage chamber 413 is formed between the outer wall of the neutralizing filter element 42 and the side wall of the cavity. The water storage chamber 413 is connected to the water inlet 411 through the neutralizing filter element 42 and is also connected to the water outlet 412. The liquid level sensor 43 is disposed on the filter housing 41 and is used to detect the liquid level in the cavity.

[0043] In this embodiment, the filter element 42 has a volume of not less than 10 ml. Inside the neutralizing filter element 42, there is filter media for neutralizing the acidity of the condensate. The filter media is a granular alkaline filter material, such as calcium carbonate, magnesium carbonate, magnesium oxide, or other single or composite materials that are not easily soluble in water. The liquid level sensor 43 includes a lower liquid level detection unit and an upper liquid level detection unit. The lower liquid level detection unit is located on the side wall of the filter housing 41 and is higher than the water outlet 412, used to detect the lowest liquid level in the filter assembly 4. The upper liquid level detection unit is located on the top of the filter housing 41, used to detect the highest liquid level in the filter assembly 4.

[0044] More specifically, a drain port 414 is provided at the bottom of the filter assembly 4, and a plug 44 or a switch valve is provided at the drain port 414. This allows condensate to be directed to the sewer or water tank by opening the drain port 414 in case of pump or atomizing component failure, ensuring that the water heater can still operate normally and output hot water. In addition, a liquid seal structure 415 with a liquid seal height of not less than 250mm is provided at the bottom of the filter assembly 4, and the drain port 414 is connected to the inside of the filter assembly 4 through the liquid seal structure.

[0045] refer to Figure 1 Furthermore, this embodiment also provides a gas water heater, including a water heater body 6, a condensing heat exchange device as described above, and a control component 7. The water heater body 6 is provided with a cold water pipe 611, a hot water pipe 612, a burner assembly 62, a flue gas assembly 63, and a water flow sensor 64. The burner assembly 62 has a heat exchanger 621, the flue gas assembly 63 is disposed on top of the burner assembly 62, and the water flow sensor 64 is disposed on the cold water pipe 611. The condensing heat exchange device is disposed inside the water heater body 6. The flue gas inlet 112 is connected to the flue gas outlet of the burner assembly 62 through the flue gas assembly 63. The inlet of the heat exchange tube 21 is connected to the cold water pipe 611, and the outlet of the heat exchange tube 21 is connected to the hot water pipe 612 through the heat exchanger 621. The control component 7 is electrically connected to the burner assembly 62, the flue gas assembly 63, the water flow sensor 64, and the condensing heat exchange device. Specifically, the filter assembly is installed below the casing of the water heater body 6 to facilitate replacement of the neutralizing filter element.

[0046] When the gas water heater is running, the high-temperature flue gas generated by gas combustion is discharged through the exhaust assembly 63 into the condensation chamber of the shell assembly 1. The acidic condensate produced as it flows through the heat exchange tube 21 flows into the filter assembly 4 through the condensate drain pipe 51 under gravity. After being filtered by the neutralization filter element 42 of the filter assembly 4 to reduce its acidity, the neutralized condensate is then pumped by the water pump 5 into the atomization chamber of the shell assembly 1. A one-way valve 53 at the outlet of the water pump 5 prevents backflow of the condensate in the atomization chamber. When the condensate level in the atomization chamber is higher than the detection switch 32, the atomizing plate 31 of the atomization assembly 3 oscillates at high frequency to convert the condensate into water mist. Part of the flue gas flowing into the condensation chamber carries away the water mist as it passes through the mixing hole into the atomization chamber, eliminating the need for an external condensate drain pipe. Therefore, the condensation heat exchange device achieves neutralization, purification, and atomization discharge of the condensate, solving the problems of difficult installation and unsightly impact of condensate drain pipes.

[0047] Specifically, the control component 7 can calculate the consumption of the neutralizing filter element 42 of the filter component 4 based on the cumulative water consumption of the water flow sensor 64, and alarm to remind the user to replace the neutralizing filter element 42 to prevent acidic condensate from damaging the atomizing component or being discharged outdoors with the flue gas.

[0048] Example 2

[0049] refer to Figure 6 The difference between this embodiment and Embodiment 1 is that the filter assembly and water pump in the condensing heat exchanger are omitted, and a three-way valve 14 and a condensate collector are added to the condensing heat exchanger. In this case, the condensate outlet 113 of the shell assembly 1 is selectively connected to the condensate inlet 103 or the condensate collector through the three-way valve 14. Of course, the condensate collector can also be omitted, in which case the condensate outlet 113 of the shell assembly 1 is selectively connected to the condensate inlet 103 or the sewer through the three-way valve 14.

[0050] When the three-way valve connects the condensate outlet 113 and the condensate inlet 103, the condensing chamber and the atomizing chamber are connected to form a communicating vessel. To ensure the liquid storage capacity of the condensing chamber and the atomizing chamber, the flue gas inlet 112 is designed to be higher than the maximum liquid level of the atomizing chamber. In addition, to prevent the heat exchange tubes from being soaked by condensate, the heat exchange tubes 21 can be designed to be higher than the maximum liquid level of the condensing chamber; to neutralize the acidity of the condensate, a neutralizing agent can be added to the condensing chamber or the atomizing chamber.

[0051] Example 3

[0052] refer to Figure 7 This embodiment provides a control method for a gas water heater, which is applied as described in Embodiment 1. The condensate outlet 113 of the shell assembly 1 is connected to the condensate inlet 103 of the shell assembly 1 via the filter assembly 4 and the water pump 5 in sequence. The control method includes:

[0053] S1, the water heater ignites, and the exhaust component 63 is activated to exhaust the flue gas;

[0054] Specifically, before the water heater is ignited, the water heater is in standby mode. The water heater obtains the inlet water flow of the cold water pipe 611 through the water flow sensor 64. The control component 7 determines whether the inlet water flow is greater than the preset start-up flow. If not, the water heater is in standby mode. If so, the water heater is ignited and the exhaust component 63 is activated to exhaust the exhaust gas. At this time, the water heater enters the shower operation mode.

[0055] S2, obtain and determine whether the liquid level in the atomizing chamber 101 is higher than the detection switch 32 of the atomizing component 3. If not, turn off the atomizing component 3 and proceed to the next step. If yes, turn on the atomizing component 3 and proceed to the next step. When the atomizing component 3 is turned on, the condensed water in the atomizing chamber 101 is atomized and carried away with the flue gas.

[0056] S3, obtain and determine whether the liquid level in the filter component 4 is higher than the maximum liquid level. If not, return to step S2. If yes, turn on the water pump 5 and record the start time of the water pump 5.

[0057] S4, obtain and determine whether the liquid level in the filter component 4 is lower than the minimum liquid level. If not, proceed to the next step. If yes, turn off the water pump 5 and return to step S2.

[0058] S5, determine whether the start time of water pump 5 exceeds the preset maximum pumping time. If not, return to step S4; otherwise, proceed to the next step.

[0059] S6, obtain and determine whether the liquid level in the filter component 4 is higher than the maximum liquid level. If not, turn off the water pump 5 and return to step S2. If yes, turn off the water heater and shut off the flame, turn off the atomizing component 3, the water pump 5 and the smoke exhaust component 63, and report a drainage atomization fault.

[0060] Specifically, when the water heater detects that the liquid level in the filter assembly 4 is higher than the maximum liquid level, there are two possibilities: First, the water pump is malfunctioning. Due to the pump malfunction, it cannot pump the neutralized condensate from the filter assembly 4 into the atomizing chamber, resulting in the liquid level in the filter assembly 4 being higher than the maximum liquid level. Second, the atomizing component is malfunctioning. While the water pump continuously pumps the neutralized condensate from the filter assembly 4 into the atomizing chamber, the atomizing component malfunctions and cannot atomize the condensate in the atomizing chamber, causing the liquid level in the atomizing chamber to be too high and overflow into the condensing chamber, and then flow back from the condensing chamber to the filter assembly, thus forming a condensate circulation pipeline. When the liquid level in the filter assembly 4 is higher than the maximum liquid level, and the water pump or atomizing component is malfunctioning, the plug or valve of the filter assembly 4 can be opened to allow the condensate to be drained into the sewer or tank through the drain port 414, ensuring that the water heater can still operate normally and output hot water.

[0061] As can be seen, by activating the atomizing component 3 when the liquid level in the atomizing chamber 101 is higher than the detection switch 32, and by activating the water pump 5 when the liquid level in the filter component 4 is higher than the maximum liquid level, the condensate water is atomized and carried away with the flue gas. This eliminates the need for a separate condensate drain pipe, ensuring the aesthetic appearance of the water heater and solving the problems of difficult and unsightly condensate drain pipe installation. Furthermore, by controlling the water heater to shut down and extinguish the flame when the water pump 5 operates for longer than the preset maximum pumping time and when the liquid level in the filter component 4 is higher than the maximum liquid level, the atomizing component 3, water pump 5, and flue gas exhaust component 63 are turned off, and a drainage atomization fault is reported. This allows for the identification of a water pump or atomizing component malfunction. When the atomizing component is working but no water mist is generated in the atomizing chamber, the atomizing component is identified as faulty; when the atomizing component is working and water mist is generated in the atomizing chamber, the water pump is identified as faulty.

[0062] refer to Figure 7 Furthermore, shutting off water pump 5 and returning to step S2 specifically includes:

[0063] ① After shutting down water pump 5, obtain and determine whether the inlet flow rate of cold water pipe 611 is greater than the preset start-up flow rate. If not, return to step S2; otherwise, proceed to the next step.

[0064] ②When the water heater is turned off, the exhaust component and atomizing component 3 continue to work, and the working time of atomizing component 3 is recorded.

[0065] ③ Obtain and determine whether the liquid level in the atomizing chamber 101 is higher than the detection switch 32 of the atomizing component 3. If not, proceed to the next step. If yes, turn off the atomizing component 3 and the smoke exhaust component 63. At this time, the water heater enters the standby state.

[0066] ④ Determine whether the working time of the atomizing component 3 exceeds the preset maximum atomization time. If not, return to the previous step. If so, turn off the atomizing component 3 and the smoke exhaust component 63. At this time, the water heater enters the standby state.

[0067] It can be seen that by turning off the water heater and controlling the smoke exhaust component and atomizing component 3 to continue working for a period of time, the condensate in the atomizing chamber can be atomized and carried away, effectively reducing the amount of condensate remaining in the atomizing chamber 101.

[0068] Example 4

[0069] refer to Figure 8 This embodiment provides a control method for a gas water heater, which is applied as described in Embodiment 2. The condensate outlet 113 of the shell assembly 1 is selectively connected to the condensate inlet 103 or the condensate collector through a three-way valve 14. The control method includes:

[0070] S1', the water heater is ignited, the exhaust component 63 is activated to exhaust the flue gas, and the three-way valve 14 is controlled to connect the condensate outlet 113 and the condensate inlet 103;

[0071] Specifically, before the water heater is ignited, it is in standby mode. The water heater obtains the inlet flow rate of the cold water pipe 611 through the water flow sensor 64. The control component 7 determines whether the inlet flow rate is greater than the preset start-up flow rate. If not, the water heater is in standby mode. If so, the water heater is ignited, the exhaust component 63 is activated to exhaust the exhaust gas, and the three-way valve 14 is controlled to open the condensate outlet 113 and the condensate inlet 103. At this time, the water heater enters the shower operation mode.

[0072] S2': Obtain and determine whether the liquid level in the atomizing chamber 101 is higher than the detection switch 32 of the atomizing component 3. If not, continue to execute this step until the water heater is turned off. If so, proceed to the next step.

[0073] S3', turn on atomizing component 3 and record the time when atomizing component 3 is turned on;

[0074] S4', obtain and determine whether the liquid level in the atomizing chamber 101 is lower than the detection switch 32 of the atomizing component 3. If not, proceed to the next step. If yes, turn off the atomizing component 3 and return to step S2' until the water heater is turned off and the exhaust component 63 is turned off.

[0075] S5' Determine whether the opening time of the atomizing component 3 exceeds the preset maximum atomization time. If not, return to step S4'. If yes, proceed to the next step.

[0076] S6', obtain and determine whether the liquid level in the atomizing chamber 101 is higher than the detection switch 32 of the atomizing component 3. If not, turn off the atomizing component 3 and return to step S2' until the water heater is turned off and the exhaust component 63 is turned off. If so, turn off the atomizing component 3 and proceed to the next step.

[0077] S7' controls the three-way valve 14 to connect the condensate outlet 113 to the condensate collector and reports an atomization fault.

[0078] As can be seen, by activating the atomizing component 3 when the liquid level in the atomizing chamber 101 is higher than the detection switch 32, the condensate is atomized and carried away with the flue gas, eliminating the need for a separate condensate drain pipe, thus maintaining the aesthetic appearance of the water heater and solving the problems of difficult and unsightly condensate drain pipe installation. Furthermore, by deactivating the atomizing component 3 when its activation time exceeds the preset maximum atomization time and the liquid level in the atomizing chamber 101 is higher than the detection switch 32, the atomizing component 3 is deactivated, controlling the three-way valve 14 to connect the condensate outlet 113 to the condensate collector, ensuring the water heater can continue operating. When the water heater is turned off, it reports an atomization fault, thus identifying a malfunction in the atomizing component.

[0079] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A condensation heat exchange device, characterized in that, include: The housing assembly (1) has an atomizing chamber (101) and a condensing chamber (102). The condensing chamber (102) is located around the atomizing chamber (101), or the condensing chamber (102) is arranged side by side with the atomizing chamber (101). The housing assembly (1) is provided with a smoke inlet (112), a smoke outlet (121) and a condensate outlet (113) that are all connected to the condensing chamber (102). The housing assembly (1) is provided with a condensate inlet (103) and an air outlet that are connected to the atomizing chamber (101). The condensate inlet (103) is connected to the condensate outlet (113), and the air outlet is connected to the smoke outlet (121) or the upper end of the condensing chamber (102). The heat exchange assembly includes a heat exchange tube (21) disposed in the condensation chamber (102); Atomizing component (3) is disposed in the atomizing chamber (101) for atomizing the condensed water in the atomizing chamber (101).

2. The condensation heat exchange device according to claim 1, characterized in that, The smoke inlet (112) is located on the side wall or bottom of the housing assembly (1), and the smoke outlet (121) is located on the top of the housing assembly (1); the air outlet is located on the top of the atomizing chamber (101), and a mixing hole (104) is provided on the side wall of the atomizing chamber (101) that is higher than the smoke inlet (112) and communicates with the condensing chamber (102).

3. A condensing heat exchange device according to claim 1 or 2, characterized in that, The housing assembly (1) includes an outer shell (11) and a top cover (12). The top cover (12) is installed on the top of the outer shell (11) and has the exhaust port (121). A partition (111) is integrally formed inside the outer shell (11). The partition (111) divides the interior of the outer shell (11) into the atomizing chamber (101) and the condensing chamber (102) arranged side by side. The outer shell (11) has the exhaust port (112), the condensate outlet (113) and the condensate inlet (103). The heat exchange tube (21) is arranged back and forth in the condensing chamber (102).

4. A condensation heat exchanger according to claim 3, characterized in that, An air outlet communicating with the atomizing chamber (101) is formed between the top of the partition (111) and the upper cover (12), and a mixing hole (104) communicating with the condensing chamber (102) and the atomizing chamber (101) is provided at the upper end of the partition (111).

5. A condensing heat exchanger according to claim 1 or 2, characterized in that, The housing assembly (1) includes an outer shell (11), a top cover (12), and an inner shell (13). The top cover (12) is installed on the top of the outer shell (11) and has the exhaust port (121). The inner shell (13) is disposed inside the outer shell (11) and has an atomizing chamber (101) and a condensate inlet (103). The condensate inlet (103) passes through the mounting port of the outer shell (11). A condensation chamber (102) is formed between the inner shell (13) and the outer shell (11). The exhaust port (112) and the condensate outlet (113) are provided on the outer shell (11). The heat exchange tube (21) is disposed inside the condensation chamber (102) and is arranged in a spiral pattern along the atomizing chamber (101).

6. A condensation heat exchange device according to claim 5, characterized in that, The top of the inner shell (13) is open to form the air outlet, and a plurality of mixing holes (104) arranged circumferentially and communicating with the condensation chamber (102) are provided on the upper end of the side wall of the inner shell (13).

7. A condensation heat exchange device according to claim 1, characterized in that, The atomizing component (3) is provided with an atomizing plate (31) and a detection switch (32), the detection switch (32) being used to detect the level of condensate in the atomizing chamber (101).

8. A condensing heat exchanger according to claim 1, 2, or 7, characterized in that, The condensate outlet (113) is selectively connected to the condensate inlet (103) or the condensate collector via a three-way valve (14); or It also includes a filter assembly (4) and a water pump (5), wherein the water inlet of the filter assembly (4) is connected to the condensate outlet (113), and the water outlet (412) of the filter assembly (4) is connected to the condensate inlet (103) through the water pump (5), wherein the filter assembly (4) is used to filter and neutralize the condensate.

9. A condensation heat exchanger according to claim 8, characterized in that, The filter assembly (4) includes a filter housing (41), a neutralization filter element (42), and a liquid level sensor (43). The filter housing (41) has a cavity with a bottom opening. The filter inlet (411) is provided at the top of the filter housing (41), and the filter outlet (412) is provided at the lower end of the side wall of the filter housing (41). The neutralizing filter element (42) is embedded in the cavity. The top of the neutralizing filter element (42) abuts against the top of the cavity, and the bottom covers the bottom opening and is detachably connected to the filter shell (41). A water storage chamber (413) is formed between the outer wall of the neutralizing filter element (42) and the side wall of the cavity. The water storage chamber (413) is connected to the water inlet (411) through the neutralizing filter element (42), and the water storage chamber (413) is connected to the water outlet (412). The liquid level sensor (43) is disposed on the filter housing (41) and is used to detect the liquid level in the cavity.

10. A condensation heat exchanger according to claim 8, characterized in that, A drain port (414) is provided at the bottom of the filter assembly (4), and a plug or switch valve is provided at the drain port (414).

11. A gas water heater, characterized in that, include: The water heater body (6) is provided with a cold water pipe (611), a hot water pipe (612), a burner assembly (62), a flue gas assembly (63), and a water flow sensor (64). The burner assembly (62) has a heat exchanger (621). The flue gas assembly (63) is located on the top of the burner assembly (62). The water flow sensor (64) is located on the cold water pipe (611). A condensing heat exchange device as described in any one of claims 1-10, wherein the condensing heat exchange device is disposed within the water heater body (6), the flue gas inlet (112) is connected to the flue gas outlet of the exhaust assembly (63), the inlet of the heat exchange tube (21) is connected to the cold water pipe (611), and the outlet of the heat exchange tube (21) is connected to the hot water pipe (612) through the heat exchanger (621); and The control component (7) is electrically connected to the burner assembly (62), the exhaust assembly (63), the water flow sensor (64), and the condensation heat exchange device, respectively.

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