Condensate water treatment device and gas water heater

Abstract

This application discloses a condensate treatment device and a gas water heater. The condensate treatment device includes a condensate buffer tank for collecting condensate; an electrolysis module located below and in constant communication with the buffer tank for electrolyzing the condensate to produce hydrogen and oxygen; a mixed gas container connected to the electrolysis module for receiving hydrogen and oxygen; a gas pump connected to the mixed gas container for pumping air into the mixed gas container to adjust the hydrogen concentration; and a control unit electrically connected to the electrolysis module and the gas pump for controlling the start and stop of the electrolysis module and the start, stop, and speed of the gas pump. This application treats condensate by electrolysis, introducing the generated hydrogen and oxygen into the combustion chamber for combustion, achieving the recycling of condensate and closed-loop energy utilization, avoiding the problems of installation limitations, high maintenance costs, and short atomizer lifespan associated with traditional external discharge or atomization treatment.

Description

Technical Field

[0001] This application relates to the field of gas water heater technology, and in particular to a condensate treatment device and a gas water heater. Background Technology

[0002] During the combustion process of a gas water heater, water vapor in the flue gas condenses into liquid condensate after cooling on the surface of the condenser heat exchanger. Currently, there are two main methods for treating condensate: external discharge through a drain pipe and external discharge via atomization.

[0003] The external drainage system requires an external drain pipe, which greatly limits the installation location (such as kitchens, bedrooms, and balconies without floor drains); in winter, the drain pipe freezes and becomes blocked, which can easily cause condensate to overflow; and it requires a consumable neutralizing box, which needs to be replaced regularly, increasing maintenance costs, and the neutralization efficiency decreases after long-term operation.

[0004] The atomizer used for external atomization has a limited lifespan in humid and acidic environments (usually 2-3 years); atomization efficiency decreases in high humidity or low temperature environments, which may lead to condensation accumulation; and the discharged fine acidic droplets pose a risk of corrosion and pollution to pipelines and the surrounding environment. Summary of the Invention

[0005] The purpose of this application is to provide a condensate treatment device and a gas water heater to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: In a first aspect, this application provides a condensate treatment device applied to a gas water heater, the gas water heater including a condensing heat exchanger and a combustion chamber, the condensate treatment device comprising: A condensate buffer tank is provided with an inlet for connecting to the condensate outlet of the condensate heat exchanger, for collecting condensate; An electrolysis module is vertically positioned below the condensate buffer tank. The outlet of the condensate buffer tank is normally connected to the inlet of the electrolysis module. The electrolysis module is used to electrolyze the condensate flowing into it to produce hydrogen and oxygen. A gas mixing container, the gas inlet of which is connected to the gas outlet of the electrolysis module, is used to receive the hydrogen and the oxygen. The gas mixing container is also provided with a gas mixing outlet for communication with the combustion chamber. An air pump, connected to the mixed gas container, is used to pump air into the mixed gas container to adjust the hydrogen concentration in the mixed gas container; The control unit is electrically connected to the electrolysis module and the air pump, and is used to control the start and stop of the electrolysis module, as well as the start and stop and the speed of the air pump.

[0007] Furthermore, the condensate buffer tank is equipped with a high-level liquid level sensor, a medium-level liquid level sensor, and a low-level liquid level sensor, all of which are electrically connected to the control unit. The control unit is configured as follows: When both the mid-level liquid level sensor and the low-level liquid level sensor have signals, the electrolysis module is activated. When the low-level liquid level sensor has no signal, the electrolysis module is stopped. When the high-level liquid level sensor, the middle-level liquid level sensor, and the low-level liquid level sensor continuously send signals simultaneously for a preset time, it is determined to be a condensate blockage fault, and a fault alarm signal is output.

[0008] Furthermore, a hydrogen concentration sensor is installed inside the mixed gas container, and the hydrogen concentration sensor is electrically connected to the control unit; The control unit is configured as follows: When the hydrogen concentration sensor detects that the hydrogen concentration is lower than or equal to a first preset value, the mixed gas is allowed to be discharged into the combustion chamber through the mixed gas outlet; When the hydrogen concentration is detected to be higher than the first preset value, the speed of the gas pump is increased until the hydrogen concentration drops below the second preset value; When the hydrogen concentration is detected to be lower than the third preset value, the gas pump is stopped.

[0009] Furthermore, the first preset value is 3.5%, the second preset value is 1%, and the third preset value is 2%.

[0010] Furthermore, the air pump is also connected to the condensate buffer tank, and the control unit controls the air pump to pump air into the condensate buffer tank when the electrolysis module is started, so as to force the condensate into the electrolysis module.

[0011] Furthermore, the air pump is provided with an air inlet, a first air outlet, and a second air outlet. The air inlet is connected to the outside atmosphere, the first air outlet is connected to the condensate buffer tank through a first pipeline, and the second air outlet is connected to the mixed gas container through a second pipeline.

[0012] Furthermore, a first valve is provided on the first pipeline, and a second valve is provided on the second pipeline. Both the first valve and the second valve are electrically connected to the control unit.

[0013] Furthermore, the gas outlet of the electrolysis module includes a hydrogen outlet and an oxygen outlet, and the gas inlet of the mixed gas container includes a hydrogen inlet and an oxygen inlet. The hydrogen outlet is connected to the hydrogen inlet, and the oxygen outlet is connected to the oxygen inlet.

[0014] Furthermore, the electrolysis module includes an anode plate and a cathode plate, both of which are electrically connected to the control unit.

[0015] Secondly, this application provides a gas water heater, comprising: A condensing heat exchanger is used to condense flue gas to produce condensate. The combustion chamber is used for burning fuel gas. The aforementioned condensate treatment device includes a condensate buffer tank whose inlet is connected to the condensate outlet of the condensate heat exchanger, and a mixed gas outlet in the mixed gas container of the condensate treatment device connected to the combustion chamber.

[0016] The technical solutions provided in this application have the following advantages compared with the prior art: 1. This application provides a solution for treating condensate by electrolysis, which electrolyzes the condensate into hydrogen and oxygen for recycling, avoiding the problems of installation restrictions, high maintenance costs, and short atomizer life caused by traditional external discharge or atomization methods.

[0017] 2. The hydrogen produced by electrolysis of condensate is introduced into the combustion chamber for combustion and releases heat, realizing the recovery and utilization of the chemical energy of condensate; at the same time, the oxygen produced is introduced into the combustion chamber, increasing the oxygen content of the secondary air, making the combustion of gas more complete and improving the combustion efficiency.

[0018] 3. Hydrogen combustion produces water vapor, achieving a closed-loop energy utilization process with clean and pollution-free emissions. Attached Figure Description The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0021] Figure 1 This is a structural block diagram illustrating the connection between a condensate treatment device and a gas water heater, as provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures: 1. Condensing heat exchanger; 2. Condensate buffer tank; 3. Electrolysis module; 31. Hydrogen outlet; 32. Oxygen outlet; 4. Gas mixture container; 41. Hydrogen inlet; 42. Oxygen inlet; 5. Air pump; 51. First air outlet; 52. Second air outlet; 6. Combustion chamber; 7. Control unit. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0025] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0026] like Figure 1As shown in the embodiment of this application, a condensate treatment device is provided and applied to a gas water heater, which includes a condenser heat exchanger 1 and a combustion chamber 6.

[0027] The condensate treatment device includes a condensate buffer tank 2, an electrolysis module 3, a mixed gas container 4, an air pump 5, and a control unit 7.

[0028] The condensate buffer tank 2 is provided with an inlet for connecting to the condensate outlet of the condensate heat exchanger 1, for collecting condensate.

[0029] The electrolysis module 3 is vertically positioned below the condensate buffer tank 2, with the outlet of the condensate buffer tank 2 and the inlet of the electrolysis module 3 normally connected. Specifically, the bottom wall of the condensate buffer tank 2 has an outlet, and the inlet of the electrolysis module 3 is located on its top wall. The outlet of the condensate buffer tank 2 and the inlet of the electrolysis module 3 are connected by a pipeline. Since the electrolysis module 3 is located below the condensate buffer tank 2, there is no valve blocking the flow between them, allowing condensate to flow spontaneously from the condensate buffer tank 2 into the electrolysis module 3 under gravity. Those skilled in the art should understand that, as long as the function of condensate flowing naturally into the electrolysis module by gravity can be achieved, the specific positions of the outlet of the condensate buffer tank 2 and the inlet of the electrolysis module 3 can be adjusted according to the actual installation space.

[0030] Electrolysis module 3 is used to electrolyze the condensate flowing into it to produce hydrogen and oxygen. Specifically, electrolysis module 3 includes an anode plate and a cathode plate. The anode plate and cathode plate are disposed opposite each other inside the electrolysis module 3, forming an electrolysis chamber between them. The anode plate and cathode plate are electrically connected to control unit 7. After the condensate enters the electrolysis chamber through the inlet of electrolysis module 3, control unit 7 energizes the anode plate and cathode plate, causing the condensate to undergo an electrolysis reaction under the action of an electric field: 2H2O→2H2↑+ O2↑. Hydrogen is generated on the surface of the cathode plate, and oxygen is generated on the surface of the anode plate. As an optional embodiment, the anode plate and cathode plate can be flat electrodes, mesh electrodes, or tubular electrodes.

[0031] The gas inlet of the gas mixing container 4 is connected to the gas outlet of the electrolysis module 3 for receiving hydrogen and oxygen. Specifically, the gas outlet of the electrolysis module 3 includes a hydrogen outlet 31 and an oxygen outlet 32, and the gas inlet of the gas mixing container 4 includes a hydrogen inlet 41 and an oxygen inlet 42. The hydrogen outlet 31 is connected to the hydrogen inlet 41, and the oxygen outlet 32 ​​is connected to the oxygen inlet 42. As an optional implementation, hydrogen and oxygen can also enter the gas mixing container 4 through a common channel. This method has a more compact structure and is suitable for water heater models with high space requirements.

[0032] The mixed gas container 4 is also provided with a mixed gas outlet for communication with the combustion chamber 6, through which hydrogen and oxygen are introduced into the combustion chamber 6 to participate in combustion.

[0033] The air pump 5 is connected to the mixed gas container 4 and is used to pump air into the mixed gas container 4 to adjust the hydrogen concentration in the mixed gas container 4.

[0034] The control unit 7 is electrically connected to the electrolysis module 3 and the air pump 5, and is used to control the start and stop of the electrolysis module 3, as well as the start and stop and speed of the air pump 5. The control unit 7 can be implemented in the form of a microcontroller, a programmable logic controller (PLC) or an application-specific integrated circuit (ASIC), as long as it can realize the electrical control of the electrolysis module and the air pump. This application does not limit the specific implementation form of the control unit.

[0035] Understandably, when the condensate treatment device of this application is in use, the condensate generated by the condenser heat exchanger 1 flows into the condensate buffer tank 2; the condensate flows from the condensate buffer tank 2 into the electrolysis module 3 under the action of gravity, and the control unit 7 controls the electrolysis module 3 to start, electrolyzing the condensate flowing into the electrolysis module 3 to produce hydrogen and oxygen; the hydrogen and oxygen enter the mixed gas container 4, and at the same time, the air pump 5 pumps air into the mixed gas container 4 to mix, so as to adjust the hydrogen concentration; the mixed gas is introduced into the combustion chamber 6 through the mixed gas outlet to participate in combustion.

[0036] This embodiment collects condensate in a condensate buffer tank, and uses an electrolysis module to electrolyze the condensate into hydrogen and oxygen. The hydrogen and oxygen produced by electrolysis are then introduced into the combustion chamber through a mixed gas container to participate in combustion, realizing the transformation of condensate from "waste liquid" to "combustible gas source." This avoids the problems of installation limitations, high maintenance costs, and short atomizer lifespan associated with condensate discharge or atomization treatment in existing technologies. Simultaneously, the hydrogen produced by electrolysis releases heat upon combustion, and the oxygen acts as a combustion-supporting gas to improve combustion efficiency, achieving effective recovery and utilization of the potential energy in the condensate.

[0037] In a preferred embodiment, the condensate buffer tank 2 is equipped with a high-level liquid level sensor, a mid-level liquid level sensor, and a low-level liquid level sensor. All three sensors are electrically connected to the control unit 7.

[0038] Control unit 7 is configured as follows: When both the intermediate liquid level sensor and the low liquid level sensor have signals, the electrolysis module 3 is activated.

[0039] Understandably, since the electrolysis module 3 is located below the condensate buffer tank 2 and the two are always connected, as long as there is condensate in the condensate buffer tank 2, the condensate will flow into the electrolysis module 3 under gravity. When both the middle and low level sensors receive signals, it indicates that the liquid level in the condensate buffer tank 2 has reached the middle level or above. At this time, there is already some condensate in the internal cavity of the electrolysis module 3. Therefore, the control unit 7 can start the electrolysis module 3 and begin electrolysis operation based on the signals from both the middle and low level sensors.

[0040] When the low-level liquid level sensor has no signal, the electrolysis module 2 is stopped.

[0041] Understandably, when the low level sensor has no signal, it means that the liquid level in the condensate buffer tank 2 is lower than the low level and there is insufficient condensate in the tank. At this time, the control unit 7 stops the electrolysis module 3 to avoid unnecessary losses or to prevent the electrolysis module 3 from continuing to operate in a water-deficient state and causing damage.

[0042] When the high-level liquid level sensor, the medium-level liquid level sensor, and the low-level liquid level sensor continuously send signals simultaneously for a period of time, it is determined to be a condensate blockage fault, and a fault alarm signal is output.

[0043] Understandably, when the high-level, mid-level, and low-level liquid level sensors simultaneously generate signals for an extended period exceeding a preset time, it indicates that the liquid level in the condensate buffer tank 2 remains high and does not decrease. This signifies that the condensate cannot be properly discharged or consumed. The control unit 7 determines this as a condensate blockage fault and outputs a fault alarm signal. Specifically, the control unit 7 can control the gas water heater to close the gas valve and stop combustion, and issue a fault warning to the user via the display panel or buzzer. The user needs to troubleshoot the fault and manually drain the condensate. The preset time can be 3 minutes, or it can be set to other durations, such as 2 minutes or 5 minutes, depending on the actual application scenario. Those skilled in the art can make a reasonable selection based on the water production rate of the water heater and the volume of the buffer tank, as long as misjudgment caused by instantaneous liquid level fluctuations is avoided.

[0044] As an optional implementation, the high-level, mid-level, and low-level liquid level sensors can be any one of a float-type liquid level switch, a capacitive liquid level sensor, an ultrasonic liquid level sensor, or an electrode-type liquid level sensor. Float-type liquid level switches are less expensive and suitable for cost-sensitive household water heaters; capacitive and ultrasonic liquid level sensors offer higher accuracy and are suitable for high-end models requiring precise liquid level control.

[0045] This embodiment achieves automatic start-stop control of the electrolysis module by setting up three liquid level sensors (high, medium, and low levels) and configuring the control unit accordingly: electrolysis is automatically started when both the medium and low levels have signals, ensuring that the electrolysis module only starts working when there is already condensate flowing in; electrolysis is automatically stopped when there is no signal at the low level to prevent the electrolysis module from burning out and being damaged; when all three liquid levels have signals simultaneously for a preset time, a blockage fault is automatically identified and an alarm is triggered to remind the user to intervene in time. The above control logic together ensures that the condensate treatment device can automatically respond in three different states: water shortage, normal operation, and blockage, improving the safety and reliability of the system.

[0046] In a preferred embodiment, a hydrogen concentration sensor is provided inside the mixed gas container 4, and the hydrogen concentration sensor is electrically connected to the control unit 7.

[0047] Control unit 7 is configured as follows: When the hydrogen concentration sensor detects that the hydrogen concentration is lower than or equal to the first preset value, the mixed gas is allowed to be discharged to the combustion chamber 6 through the mixed gas outlet.

[0048] Specifically, when the hydrogen concentration sensor detects that the hydrogen concentration is lower than or equal to a first preset value, it indicates that the hydrogen concentration in the mixed gas is within a safe range, and the control unit 7 allows the mixed gas to be discharged into the combustion chamber 6 through the mixed gas outlet. Hydrogen burns in the combustion chamber 6, releasing heat and increasing the calorific value; oxygen, as an oxidizing gas, participates in combustion, making the combustion more complete. The first preset value is preferably 3.5%, which is a safe threshold near the lower flammability limit of hydrogen in air, ensuring that the mixed gas does not reach a deflagration concentration before entering the combustion chamber.

[0049] When the hydrogen concentration is detected to be higher than the first preset value, the speed of the air pump 5 is increased until the hydrogen concentration drops below the second preset value.

[0050] Specifically, when the detected hydrogen concentration is higher than a first preset value, it indicates that the hydrogen concentration in the gas mixture has entered or is close to the deflagration range, posing a safety hazard. At this time, the control unit 7 increases the speed of the air pump 5 to increase the air mixing volume, thereby diluting the hydrogen concentration in the gas mixture until the hydrogen concentration drops below a second preset value. Then, the gas mixture is reintroduced into the combustion chamber 6. The second preset value is preferably 1%, which is far below the lower combustion limit of hydrogen, ensuring absolute safety when combustion is resumed.

[0051] When the hydrogen concentration is detected to be lower than the third preset value, the gas pump 5 is stopped.

[0052] Specifically, when the hydrogen concentration is detected to be lower than a third preset value, the control unit 7 stops the air pump 5. At this point, the hydrogen concentration in the mixed gas is low enough that there is no need to continue pumping air for dilution. Stopping the air pump 5 saves energy and prevents excessive air from entering the combustion chamber 6, which would affect combustion efficiency. The third preset value is preferably 2%.

[0053] This embodiment achieves precise control of the hydrogen concentration in the gas mixture by using a hydrogen concentration sensor and a closed-loop control unit to regulate the pump speed. When the hydrogen concentration is within a safe range (≤3.5%), it is allowed to enter the combustion chamber for energy recovery. When the hydrogen concentration is too high (>3.5%), air is automatically added to dilute it to below 1% to ensure safety. When the hydrogen concentration is sufficiently low (<2%), the pump is stopped to save energy. This control logic strikes a balance between safety and energy saving, avoiding the risk of hydrogen deflagration while ensuring combustion efficiency and energy recovery.

[0054] In this application, the air pump 5 is also connected to the condensate buffer tank 2. When the electrolysis module 3 is started, the control unit 7 controls the air pump 5 to pump air into the condensate buffer tank 2 so as to force the condensate into the electrolysis module 3.

[0055] Specifically, the air pump 5 is provided with an air inlet, a first air outlet 51 and a second air outlet 52, and the air inlet is connected to the outside atmosphere.

[0056] The first air outlet 51 is connected to the condensate buffer tank 2 via the first pipeline. When the control unit 7 starts the electrolysis module 3, the control unit 7 simultaneously controls the air pump 5 to start, pumping air into the condensate buffer tank 2 through the first pipeline, increasing the pressure inside the condensate buffer tank 2, and forcing the condensate into the electrolysis module 3, ensuring a sufficient supply of condensate to the electrolysis module 3. Since the electrolysis module 3 is located below the condensate buffer tank 2 and the two are always connected, when the air pump 5 stops, the condensate can flow into the electrolysis module 3 spontaneously by gravity. The intervention of the air pump 5 is a supplementary pressurization method when gravity is insufficient to meet the electrolysis water demand. For example, when the condensate production rate is low or the pipeline resistance is high, pressurization can ensure that the electrolysis module always has a sufficient water supply, avoiding a decrease in electrolysis efficiency or damage to the electrolysis module due to insufficient water.

[0057] The second outlet 52 is connected to the mixed gas container 4 via a second pipeline. The control unit 7, based on the detection signal from the hydrogen concentration sensor, controls the amount of air pumped into the mixed gas container 4 by adjusting the rotation speed of the air pump 5, thereby regulating the hydrogen concentration within the mixed gas container 4. When the hydrogen concentration is too high, the rotation speed is increased to increase the gas supply; when the hydrogen concentration is too low (below 2%), the air pump is stopped to avoid excessive dilution.

[0058] Preferably, a first valve is installed on the first pipeline, and a second valve is installed on the second pipeline. Both the first and second valves are electrically connected to the control unit 7. By installing the valves, the control unit 7 can independently control the opening and closing of the two gas paths, preventing air from accidentally entering the buffer tank when only gas needs to be supplied to the gas mixture container, or preventing air from accidentally entering the gas mixture container when only pressurization of the buffer tank is required.

[0059] Specifically, when pressurization of the condensate buffer tank 2 is required, the control unit 7 opens the first valve and closes the second valve; when air needs to be pumped into the mixed gas container 4, the control unit 7 opens the second valve and closes the first valve; when both are required, both valves are opened simultaneously. This design further improves the flexibility and safety of system control.

[0060] This embodiment uses a single air pump to simultaneously perform the dual functions of pressurizing and draining the buffer tank and supplying gas to the mixed gas container to dilute the hydrogen concentration, simplifying the system structure and reducing costs. Furthermore, by installing valves on the first and second pipelines respectively, the control unit can independently control the on / off state of the two gas paths, achieving independent control of "pressurization and drainage" and "concentration adjustment," further improving the system's control flexibility and safety.

[0061] This application also provides a gas water heater, including a condensing heat exchanger 1, a combustion chamber 6, and the condensate treatment device described in any of the above embodiments.

[0062] The condenser heat exchanger 1 is used to condense the flue gas to produce condensate. The combustion chamber 6 is used to supply fuel gas for combustion.

[0063] The inlet of the condensate buffer tank 2 of the condensate treatment device is connected to the condensate outlet of the condensate heat exchanger 1, and the outlet of the mixed gas container 4 of the condensate treatment device is connected to the combustion chamber 6.

[0064] After the gas water heater is put into operation, the gas is burned in the combustion chamber 6 to produce high-temperature flue gas. When the high-temperature flue gas passes through the condenser heat exchanger 1, it is cooled to below the dew point, and the water vapor in the flue gas condenses into liquid condensate.

[0065] Condensate flows through a pipeline into condensate buffer tank 2 for temporary storage. Condensate buffer tank 2 is equipped with a high-level liquid level sensor, a medium-level liquid level sensor, and a low-level liquid level sensor. The three sensors detect the liquid level in the tank in real time and transmit the signals to the control unit 7.

[0066] When the liquid level in the condensate buffer tank 2 rises to the middle level (i.e., both the middle level sensor and the low level sensor receive signals), since the electrolysis module 3 is located below the condensate buffer tank 2 and the two are always connected, some condensate has already flowed into the internal cavity of the electrolysis module 3 under gravity. The control unit 7 starts the electrolysis module 3 and simultaneously starts the air pump 5. The air pump 5 pumps air into the condensate buffer tank 2 through the first pipeline, increasing the pressure inside the tank and forcing the condensate into the electrolysis module 3.

[0067] The condensate is electrolyzed into hydrogen and oxygen in electrolysis module 3. The hydrogen and oxygen then enter the mixed gas container 4 through separate pipelines.

[0068] In the gas mixing container 4, hydrogen, oxygen, and air pumped in by the gas pump 5 are uniformly mixed through the gas distribution plate 42. A hydrogen concentration sensor is installed inside the gas mixing container 4 to detect the hydrogen concentration in the gas mixture in real time.

[0069] When the hydrogen concentration is below or equal to 3.5%, the control unit 7 allows the mixed gas to be introduced into the combustion chamber 6 through the mixed gas outlet to participate in combustion. Hydrogen burns in the combustion chamber 6, releasing heat, while oxygen acts as an oxidizing gas to improve combustion efficiency.

[0070] When the hydrogen concentration is higher than 3.5%, the control unit 7 determines that there is a safety risk, shuts off combustion, and increases the speed of the air pump 5 to increase the amount of air mixed in to dilute the hydrogen concentration until the hydrogen concentration drops below 1%, then resumes combustion.

[0071] When the hydrogen concentration is below 2%, the control unit 7 stops the gas pump 5 to save energy.

[0072] When the liquid level in the condensate buffer tank 2 drops below the low level (i.e., the low level sensor has no signal), the control unit 7 stops the electrolysis module 3 to prevent dry burning and damage.

[0073] When the high-level liquid level sensor, the middle-level liquid level sensor, and the low-level liquid level sensor continuously send signals for more than a preset time (e.g., 3 minutes), the control unit 7 determines that there is a condensate blockage fault, closes the gas valve to stop combustion, and outputs a fault alarm signal through the display panel or buzzer to notify the user to troubleshoot the fault and manually drain the condensate.

[0074] Thus, the condensate has completed a full treatment cycle of "collection → electrolysis → mixing → combustion", achieving closed-loop energy utilization.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0078] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0079] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0081] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0082] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A condensate treatment device, applied to a gas water heater, the gas water heater comprising a condensing heat exchanger and a combustion chamber, characterized in that, The condensate treatment device includes: A condensate buffer tank is provided with an inlet for connecting to the condensate outlet of the condensate heat exchanger, for collecting condensate; An electrolysis module is vertically positioned below the condensate buffer tank. The outlet of the condensate buffer tank is normally connected to the inlet of the electrolysis module. The electrolysis module is used to electrolyze the condensate flowing into it to produce hydrogen and oxygen. A gas mixing container, the gas inlet of which is connected to the gas outlet of the electrolysis module, is used to receive the hydrogen and the oxygen. The gas mixing container is also provided with a gas mixing outlet for communication with the combustion chamber. An air pump, connected to the mixed gas container, is used to pump air into the mixed gas container to adjust the hydrogen concentration inside the mixed gas container; The control unit is electrically connected to the electrolysis module and the air pump, and is used to control the start and stop of the electrolysis module, as well as the start and stop and the speed of the air pump.

2. The condensate treatment device according to claim 1, characterized in that, The condensate buffer tank is equipped with a high-level liquid level sensor, a medium-level liquid level sensor, and a low-level liquid level sensor, all of which are electrically connected to the control unit. The control unit is configured as follows: When both the mid-level liquid level sensor and the low-level liquid level sensor have signals, the electrolysis module is activated. When the low-level liquid level sensor has no signal, the electrolysis module is stopped. When the high-level liquid level sensor, the middle-level liquid level sensor, and the low-level liquid level sensor continuously send signals simultaneously for a preset time, it is determined to be a condensate blockage fault, and a fault alarm signal is output.

3. The condensate treatment device according to claim 1, characterized in that, A hydrogen concentration sensor is installed inside the mixed gas container, and the hydrogen concentration sensor is electrically connected to the control unit; The control unit is configured as follows: When the hydrogen concentration sensor detects that the hydrogen concentration is lower than or equal to a first preset value, the mixed gas is allowed to be discharged into the combustion chamber through the mixed gas outlet; When the hydrogen concentration is detected to be higher than the first preset value, the speed of the gas pump is increased until the hydrogen concentration drops below the second preset value; When the hydrogen concentration is detected to be lower than the third preset value, the gas pump is stopped.

4. The condensate treatment device according to claim 3, characterized in that, The first preset value is 3.5%, the second preset value is 1%, and the third preset value is 2%.

5. The condensate treatment device according to claim 1, characterized in that, The air pump is also connected to the condensate buffer tank. When the electrolysis module is started, the control unit controls the air pump to pump air into the condensate buffer tank so as to force the condensate into the electrolysis module.

6. The condensate treatment device according to claim 5, characterized in that, The air pump is equipped with an air inlet, a first air outlet, and a second air outlet. The air inlet is connected to the outside atmosphere, the first air outlet is connected to the condensate buffer tank through a first pipeline, and the second air outlet is connected to the mixed gas container through a second pipeline.

7. The condensate treatment device according to claim 6, characterized in that, A first valve is installed on the first pipeline, and a second valve is installed on the second pipeline. Both the first valve and the second valve are electrically connected to the control unit.

8. The condensate treatment device according to claim 1, characterized in that, The electrolysis module has a gas outlet including a hydrogen outlet and an oxygen outlet, and the mixed gas container has a gas inlet including a hydrogen inlet and an oxygen inlet. The hydrogen outlet is connected to the hydrogen inlet, and the oxygen outlet is connected to the oxygen inlet.

9. The condensate treatment device according to claim 1, characterized in that, The electrolysis module includes an anode plate and a cathode plate, both of which are electrically connected to the control unit.

10. A gas water heater, characterized in that, include: A condensing heat exchanger is used to condense flue gas to produce condensate. The combustion chamber is used for burning fuel gas. And the condensate treatment device as described in any one of claims 1 to 9, wherein the inlet of the condensate buffer tank of the condensate treatment device is connected to the condensate outlet of the condensate heat exchanger, and the mixed gas outlet of the mixed gas container of the condensate treatment device is connected to the combustion chamber.

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