Control method of water heater, water heater and storage medium

Abstract

The invention relates to a control method of a water heater, the water heater and a storage medium, and relates to the technical field of water heaters. The control method of the water heater comprises the following steps that whether a drainage assembly meets the drainage condition or not is judged, and the drainage assembly is used for collecting condensate water in a condensation heat exchanger; if the drainage condition is met, the drainage power of a drainage assembly is determined, and the drainage assembly is made to discharge condensed water collected by the drainage assembly towards the outer surface of the combustion cavity at the drainage power; if the drainage condition is not met, the drainage assembly does not drain water. Condensate water in the condensation heat exchanger can be drained through the drainage assembly, it is avoided that a large amount of condensate water is left in the condensation heat exchanger, and the condensation heat exchanger has high heat exchange efficiency. In addition, cooling outside the combustion chamber can be achieved, and faults caused by poor heat dissipation of parts at the combustion chamber are avoided.

Description

Technical Field

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

[0002] Condensing gas water heaters have the advantages of high heating efficiency and low energy consumption, and are loved by the majority of consumers. When the gas burns in the combustion chamber, the heat generated by the gas not only directly heats the heat exchange pipes in the combustion chamber, but also guides the flue gas generated by the gas to the condensing heat exchanger, through which the heat in the flue gas is further absorbed to further heat the heat exchange pipes at the condensing heat exchanger, thereby improving the heating efficiency.

[0003] However, when the gas is burning, the temperature of the combustion chamber is very high, causing the parts near the combustion chamber to be in a high temperature environment. The high temperature environment not only increases the failure rate of the parts, but also causes the shell of the water heater to have a high temperature, causing burns when the user touches the water heater shell. Summary of the invention

[0004] The present invention provides a control method of a water heater, a water heater and a storage medium, which are used to reduce high-temperature failures of the water heater and improve the user experience.

[0005] In a first aspect, the present invention provides a control method for a water heater, which determines whether a drainage component meets a drainage condition, wherein the drainage component is used to collect condensed water in a condensing heat exchanger; If the drainage condition is met, the drainage power of the drainage component is determined, and the drainage component is made to discharge the collected condensed water toward the outer surface of the combustion chamber at the drainage power; If the drainage conditions are not met, the drainage component is made not to drain.

[0006] In one embodiment, the drainage component includes an atomizer, which is used to atomize the collected condensed water and discharge it to the outer surface of the combustion chamber; the drainage conditions include that the water heater is started and the liquid level height of the atomizer reaches a first liquid level, or the liquid level height of the atomizer exceeds a second liquid level, wherein the second liquid level is higher than the first liquid level.

[0007] In one embodiment, determining the drainage power of the drainage component includes: determining whether the water heater is started; If the water heater is started, determining the operating power of the atomizer according to the operating power of the water heater; If the water heater is not started, the operating power of the atomizer is set to the first power.

[0008] In one embodiment, determining the operating power of the atomizer according to the operating power of the water heater includes calculating the operating power of the atomizer according to the following formula: , in, is the operating power of the atomizer, is the operating power of the water heater, is the rated power of the water heater, is the rated power of the atomizer, k is the proportionality coefficient, and 0<k<1.

[0009] In the second aspect, the present invention also provides a water heater, which includes: a combustion component, the combustion component includes a combustion chamber; a condensing heat exchanger, the condensing heat exchanger is connected to the combustion chamber; a drainage component, the drainage component is connected to the condensing heat exchanger to collect condensed water, the drainage port of the drainage component faces the outer surface of the combustion chamber to discharge the collected condensed water to the outer surface of the combustion chamber; and a controller, the controller is electrically connected to the drainage component, and the controller is used to execute the above-mentioned control method.

[0010] In one embodiment, the drainage assembly includes an atomizer and a liquid level detection device, wherein the liquid level detection device is connected to the atomizer and is used to measure the liquid level height of condensed water in the atomizer; the controller is electrically connected to the atomizer, and the controller is electrically connected to the liquid level detection device.

[0011] In one embodiment, the drainage component also includes a neutralization device, one side of the neutralization device is connected to the condensing heat exchanger, and the other side of the neutralization device is connected to the atomizer, and the condensed water in the atomizer is the condensed water after acid and alkali neutralization by the neutralization device.

[0012] In one embodiment, the water heater further comprises a shell, and the burner, the condensing heat exchanger and the drainage assembly are all arranged inside the shell; the shell is equipped with an exhaust device, and the exhaust device is used to discharge the gas in the shell. In one embodiment, the condensing heat exchanger includes a first heat exchange component, and a second heat exchange component is disposed at the combustion chamber, and the second heat exchange component is connected to the first heat exchange component.

[0013] In a third aspect, the present invention further provides a storage medium having a computer program stored thereon, wherein the computer program implements the control method as described above when executed by a processor.

[0014] Compared with the prior art, the advantage of the present invention is that the condensed water in the condensing heat exchanger can be discharged by using the drainage component, so as to avoid a large amount of condensed water remaining in the condensing heat exchanger, so that the condensing heat exchanger has a higher heat exchange efficiency. Moreover, compared with directly discharging the condensed water out of the water heater, using the drainage component to discharge the condensed water to the outer surface of the combustion chamber can achieve cooling outside the combustion chamber, avoiding failures of parts in the combustion chamber due to poor heat dissipation. At the same time, the condensed water can also be used to absorb the heat in the water heater, avoiding burns when the user touches it, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0016] Figure 1 is a schematic structural diagram of a water heater in an embodiment of the present invention; Figure 2 is a flow chart of a method for controlling a water heater in an embodiment of the present invention; Figure 3 is a flow chart of determining the drainage power of a drainage component in an embodiment of the present invention; Figure 4 is a structural block diagram of a water heater in an embodiment of the present invention; Figure 5 It is another structural block diagram of the water heater in the embodiment of the present invention.

[0017] Reference numerals: 100. Combustion assembly; 110. Combustion chamber; 200, condensing heat exchanger; 210, condensing heat exchange chamber; 300, drainage assembly; 310, atomizer; 320, neutralization device; 330, conduit; 400, housing; 500, exhaust assembly; 510, exhaust fan; 610, water inlet pipe; 620, water outlet pipe; 630, gas pipe; 640, smoke exhaust pipe. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Condensing heat exchange water heaters are favored by more and more users because they can make fuller use of the heat of fuel and have higher heating efficiency. However, compared with traditional gas water heaters, condensing heat exchange water heaters have a condensing heat exchanger that uses the heat of flue gas to increase the water temperature. During the heat exchange process, the heat of water vapor in the flue gas is absorbed, causing the gaseous water vapor to cool down and form condensed water. The presence of condensed water will reduce the efficiency of the condensing heat exchanger. At present, the condensed water is often discharged directly with the flue gas to improve the heating efficiency of the condensing heat exchanger.

[0020] On the other hand, since the heat source of the condensing heat exchange water heater is still generated by gas combustion, the temperature of the combustion chamber will rise rapidly during the gas combustion process. In order to allow the water channel surrounding the combustion chamber to fully absorb the heat in the combustion chamber, the combustion chamber is generally made of copper or other materials with excellent thermal conductivity, which also causes the heat outside the combustion chamber to be very high. Parts installed outside the combustion chamber often fail due to high temperature. In addition, the shell 400 of the water heater will have a high temperature, causing the user to be burned by the shell 400 of the water heater when touching the control panel of the water heater.

[0021] In order to solve the above-mentioned problems of residual condensed water and high temperature outside the combustion chamber, the embodiments of the present application provide a control method for a water heater, a water heater, and a storage medium.

[0022] See also Figure 1 as well as Figure 2 As shown, the control method of the water heater includes the following steps: S01: Determine whether the drainage component 300 meets the drainage condition, wherein the drainage component 300 is used to collect condensed water in the condensing heat exchanger 200; S02: If the drainage component 300 meets the drainage condition, the drainage power of the drainage component 300 is determined, so that the drainage component 300 discharges the collected condensed water toward the outer surface of the combustion chamber 110 at the drainage power; S03: If the drainage condition is not met, the drainage component 300 is stopped from draining.

[0023] By discharging the condensed water collected from the condensing heat exchanger 200 to the outer surface of the combustion chamber 110, not only can the content of condensed water in the condensing heat exchanger 200 be reduced, but also the temperature outside the combustion chamber 110 can be reduced, thereby cooling the parts outside the combustion chamber 110 and preventing the parts outside the combustion chamber 110 from malfunctioning due to high temperature. At the same time, since the temperature at the combustion chamber 110 is relatively high, sufficient heat can be provided for the condensed water discharged outside the combustion chamber 110 to prevent the condensed water from solidifying due to low temperature. Compared with discharging the condensed water to the smoke exhaust pipe 640, it has a better discharge effect, preventing the condensed water from solidifying at the smoke exhaust pipe 640 and flowing back to the condensing heat exchanger 200 when the external temperature rises.

[0024] in, Figure 1 The solution of setting an atomizer 310 in the drainage component 300 is shown, and the condensed water is atomized by the atomizer 310 and then sprayed out, thereby expanding the spraying range of the condensed water and increasing the contact area between the condensed water and the outer surface of the combustion chamber, thereby achieving faster cooling of the parts outside the combustion chamber 110.

[0025] It is understandable that it is not necessary to set an atomizer 310 in the drainage component 300. In other implementations, the drainage component 300 can be directly used to drop condensed water on the outer surface of the combustion chamber 110. The condensed water can also be used to cool the outside of the combustion chamber 110, and the discharge area of ​​the condensed water can be better limited to avoid circuit damage caused by contact between the condensed water and electrical components.

[0026] Among them, since the drainage component 300 is used to drain the condensed water only when the drainage conditions are met, the drainage component 300 can be controlled to be closed when there is no need to cool the combustion chamber 110, thereby preventing the condensed water from affecting the temperature increase inside the combustion chamber 110.

[0027] See also Figure 1 As shown, in some implementations, the drainage assembly 300 includes an atomizer 310, which is used to atomize the collected condensed water and discharge it to the outer surface of the combustion chamber 110. Atomizing the condensed water by the atomizer 310 can reduce the volume of the water droplets, so that the condensed water is evenly sprayed to the outer surface of the combustion chamber 110.

[0028] The structure of the atomizer 310 is complex and diverse, and can be roughly divided into three types according to the principle of atomization: 1. Liquid pressurized atomization It only uses a pump to pressurize the liquid to the required pressure, which is called a liquid pressurized nozzle. The average spray particle size of this type of nozzle is coarser, and the finest spray particle size is about 50um (Micron).

[0029] 2. Gas-assisted atomization Using high-pressure gas as the power to assist liquid micro-atomization is called an air-assisted nozzle. The liquid supply method of this type of nozzle can be divided into two types: pressure type and siphon type. The average spray particle size is relatively fine, and the finest can reach 10~20um (Micron).

[0030] 3. Ultrasonic atomization A titanium alloy ultrasonic generator is installed at the tip of the air-assisted nozzle. When the atomized droplets hit the titanium alloy ultrasonic generator at high speed, high-frequency oscillation and ultrasound are immediately generated, and the spray particle size will be further atomized, and the average spray particle size can reach less than 10um (Micron).

[0031] The appropriate type of atomizer 310 can be selected according to the cost and performance requirements. Since the requirements for the spray particle size during cooling are not particularly high, a liquid pressurized atomizer 310 can generally be selected. Specifically, a motor-driven water pump can be installed in the atomizer 310 to pressurize the condensed water. By passing the pressurized condensed water through the nozzle of the atomizer 310, the condensed water is atomized, thereby improving the cooling effect of the condensed water.

[0032] The drainage conditions in step S01 include: 1. The water heater is started and the liquid level of the atomizer 310 reaches a first liquid level (reaching the first liquid level means that the liquid level is higher than or equal to the first liquid level); 2. The liquid level of the atomizer 310 exceeds a second liquid level, wherein the second liquid level is higher than the first liquid level.

[0033] That is to say, when one of the two requirements is met, it is determined that the drainage component 300 meets the drainage conditions, and the drainage component 300 can be controlled to spray condensed water toward the outer wall of the combustion chamber to achieve cooling of the outer surface of the combustion chamber 110.

[0034] When the condensed water in the atomizer 310 is less (higher than the first liquid level and less than the second liquid level), the drainage condition needs to be met only when the water heater is started. When the condensed water in the atomizer 310 is more, the drainage condition is directly met, regardless of whether the water heater is started at this time.

[0035] It can be understood that the water heater startup here means that the heat dissipation chamber of the water heater starts to work, that is, the gas in the combustion chamber starts to burn.

[0036] Since the drainage conditions are set to the above conditions, the condensed water can be discharged first when there is too much condensed water in the atomizer 310, so as to avoid the condensed water content exceeding the capacity of the atomizer 310, thereby causing the condensed water in the condensing heat exchanger 200 to be unable to be guided to the drainage component 300, and still remain in the condensing heat exchanger 200, affecting the subsequent hot water work.

[0037] When there is less condensed water in the atomizer 310, there is no need to release the condensed water in the drainage component 300 too early. The condensed water is discharged through the drainage component 300 only when the water heater is working normally, so as to utilize the condensed water to achieve the effect of cooling the outer surface of the combustion chamber.

[0038] In some implementations, the first liquid level may be set to 20% of the maximum capacity of the atomizer 310, and the second liquid level may be set to 70% of the maximum capacity of the atomizer 310. In other implementations, the appropriate first liquid level and second liquid level may be determined according to the performance of the atomizer 310. For example, if the storage capacity of the atomizer 310 is large, the first liquid level and the second liquid level may be appropriately increased.

[0039] See also Figures 1 to 3 As shown, in some implementations, determining the drainage power of the drainage component 300 in step S02 includes: S021: Determine whether the water heater is started; S022: If the water heater is started, the operating power of the atomizer 310 is determined according to the operating power of the water heater; S023: If the water heater is not started, the operating power of the atomizer 310 is set to the first power.

[0040] That is to say, when the water heater is started, the operating power of the atomizer 310 needs to be adjusted in real time according to the operating power of the water heater, so as to increase the operating power of the atomizer 310 when the water heater power is large, so that the water droplets sprayed by the atomizer 310 have a higher pressure, and then the water droplets sprayed from the nozzle are smaller. Thereby, the liquid sprayed by the atomizer 310 has a better cooling effect. In addition, when the operating power of the water heater is small, the operating power of the atomizer 310 is appropriately lowered, so that the particles of the water droplets sprayed by the atomizer 310 are relatively large, avoiding excessive cooling of the combustion chamber 110 and reducing the heating efficiency of the water heater.

[0041] Compared with setting the operating power of the atomizer 310 to a constant value, determining the operating power of the atomizer 310 according to the operating power of the water heater can better adapt to the operation of the water heater.

[0042] When the water heater is not started, the drainage condition that needs to be met is that the liquid level of the atomizer 310 exceeds the second liquid level. At this time, the operating power of the atomizer 310 is set to the first power, so that the condensed water in the atomizer 310 can be stably discharged. In some implementations, the first power is 50% of the rated power of the atomizer 310. Compared with setting the power of the atomizer 310 to the full load power, setting the first power to 50% of the rated power of the atomizer 310 can extend the service life of the atomizer 310. In other implementations, the appropriate first power is selected as the operating power of the atomizer 310 according to actual conditions.

[0043] In some implementations, determining the operating power of the atomizer 310 according to the operating power of the water heater includes calculating the operating power of the atomizer 310 according to the following formula: , in, is the operating power of the atomizer 310, is the operating power of the water heater, is the rated power of the water heater, is the rated power of the atomizer 310, k is the proportionality coefficient, and 0<k<1. In other words, the operating power of the atomizer 310 The operating power of the water heater In direct proportion, when the operating power of the water heater is greater, the operating power of the atomizer 310 needs to be set higher.

[0044] It is understandable that the operating power of the water heater When the power is higher, more condensed water is generated, resulting in more water being received by the atomizer 310. The higher the setting, the water in the atomizer 310 can be sprayed out in time to prevent the condensed water in the atomizer 310 from overflowing, and a better cooling effect can be provided. The water volume in the atomizer 310 can be maintained within a reasonable range to prevent the condensed water in the atomizer 310 from overflowing.

[0045] Preferably, 0.7<k<0.9. The reason for such setting is that the operating intensity of the atomizer is relatively consistent with the operating intensity of the water heater, and the operating power of the atomizer can be protected to be limited to 70%~90% of the rated power, thereby protecting the service life of the atomizer.

[0046] In some implementations, the scaling factor k is 80%, avoiding the calculated Greater than In other implementations, the proportionality coefficient k may be set according to actual conditions.

[0047] It is understandable that in order to prevent the condensed water sprayed from the atomizer 310 from corroding the outer surface of the combustion chamber 110, before the drainage component 300 discharges the collected condensed water toward the outer surface of the combustion chamber 110 with drainage power in step S02, the control method of the water heater also includes acid-base neutralization treatment of the condensed water collected by the drainage component 300.

[0048] By performing acid-base neutralization treatment on the condensed water, the corrosiveness of the condensed water can be reduced, thereby avoiding corrosion of the outer surface of the combustion chamber 110 caused by spraying the condensed water, thereby extending the service life of the combustion chamber 110.

[0049] See also Figure 1 As shown, in some implementations, in order to achieve acid-base neutralization of the condensed water, a neutralization device 320 is further provided between the atomizer 310 and the condensing heat exchanger 200 , and the acid-base neutralization of the condensed water can be achieved after the condensed water passes through the neutralization device 320 .

[0050] It can be understood that before the drainage component 300 discharges the collected condensed water toward the outer surface of the combustion chamber 110 with drainage power in step S02, the drainage direction of the drainage component 300 can also be adjusted according to the heat distribution area on the outer surface of the combustion chamber 110, so that the drainage port of the drainage component 300 is toward the area with the highest temperature on the outer surface of the combustion chamber 110.

[0051] Specifically, multiple temperature detection devices may be provided on the outer surface of the combustion chamber 110 to detect the temperature of each area on the outer surface of the combustion chamber 110. The multiple temperature detection devices are all electrically connected to the controller so that the controller can determine the area with the highest temperature on the outer surface of the combustion chamber 110 based on the temperature data measured by the multiple temperature detection devices.

[0052] In terms of adjusting the direction of the drain outlet of the drain assembly 300, a motor-driven shaft can be installed in the water heater, and the drain assembly 300 can be connected to the shaft. When the drain direction of the drain assembly 300 needs to be adjusted, the motor can be controlled by the controller to rotate, so that the drain assembly 300 on the shaft rotates, so that the condensed water discharged by the drain assembly 300 faces the area with the highest temperature on the outer surface of the combustion chamber 110. Alternatively, a mechanical arm can be installed in the water heater, and the drain assembly 300 can be installed on the mechanical arm, and the movement of the mechanical arm can be controlled by the controller, so that the drain outlet of the drain assembly 300 faces the area with the highest temperature on the outer surface of the combustion chamber 110.

[0053] Of course, it is also possible to set a plurality of injection ports with different injection directions in the drainage assembly 300, and connect the plurality of injection ports to a common condensed water collection container. During the injection process, the controller controls the injection port toward the high-temperature outer surface area of ​​the combustion chamber 110 to spray, and controls other injection ports to be closed, so that the condensed water in the condensed water collection container is discharged to the high-temperature area of ​​the outer surface of the combustion chamber 110, and the temperature of the outer surface of the combustion chamber 110 is more accurately adjusted.

[0054] Second, see Figure 1 , Figure 4 as well as Figure 5 As shown, an embodiment of the present invention further provides a water heater, which includes: a combustion component 100, a condensing heat exchanger 200, a drainage component 300 and a controller. The controller is electrically connected to the drainage component 300 and is used to execute the above control method.

[0055] The combustion assembly 100 includes a combustion chamber 110, and the condensing heat exchanger 200 is connected to the combustion chamber 110. The condensing heat exchanger 200 can use the flue gas in the combustion chamber 110 to achieve heat exchange, and guide the heat in the flue gas to the pipeline that needs to be heated, thereby improving the heating efficiency of the water heater. In addition, since the heat in the flue gas is transferred to the pipeline in the condensing heat exchanger 200, the gas water temperature in the flue gas often drops to form condensed water.

[0056] The drainage assembly 300 is connected to the condensing heat exchanger 200 to collect condensed water in the condensing heat exchanger 200. Figure 1 As shown, the drainage component 300 is connected to the bottom of the smoke exhaust pipe 640 of the condensing heat exchanger 200. When the gas water in the smoke exhaust pipe 640 condenses to form condensed water, the condensed water will fall into the drainage component 300 under the action of gravity, so that the drainage component 300 can collect the condensed water.

[0057] The drainage port of the drainage component 300 faces the outer surface of the combustion chamber 110 to discharge the collected condensed water to the outer surface of the combustion chamber 110 .

[0058] Since the drain component 300 has a drain port facing the outer surface of the combustion chamber 110, when the controller controls the drain component 300 to perform drainage, the condensed water collected in the drain component 300 can be discharged to the outer surface of the combustion chamber 110, which not only consumes the collected condensed water, but also cools the outer surface of the combustion chamber 110 to prevent parts outside the combustion chamber 110 from malfunctioning due to high temperature, and can also reduce the heat transferred from the combustion chamber 110 to the water heater shell 400, thereby preventing the temperature at the water heater shell 400 from rising too quickly, thereby improving the user experience.

[0059] See also Figure 1As shown, the height of the atomizer 310 can be set to be flush with the combustion chamber 110, or the height of the atomizer 310 can be set to be slightly higher than the height of the combustion chamber 110, so that when the condensed water in the atomizer 310 is sprayed toward the combustion chamber 110, even if it falls a certain distance due to gravity, it can still cover the outer surface of the combustion chamber 110, thereby achieving cooling of the outer surface of the combustion chamber 110.

[0060] See also Figure 1 , Figure 4 as well as Figure 5 As shown, in some implementations, the drainage assembly 300 includes an atomizer 310 and a liquid level detection device, the liquid level detection device is connected to the atomizer 310 , and the liquid level detection device is used to measure the liquid level height of the condensed water in the atomizer 310 .

[0061] The controller is electrically connected to the atomizer 310 , and the controller is electrically connected to the liquid level detection device.

[0062] Since the drain component 300 includes the atomizer 310, when the drain component 300 drains water, the atomizer 310 can be used to atomize the condensed water in the drain component 300, thereby separating the condensed water into many small-diameter condensed water particles. Compared with large particles of condensed water, the area between the atomized condensed water and the air and the outer surface of the combustion chamber 110 is increased, and the heat exchange efficiency is higher. The heat in the combustion chamber 110 can be more quickly directed to the atomized condensed water, thereby achieving cooling of the outer surface of the combustion chamber 110.

[0063] At present, liquid level detection devices can be roughly divided into capacitive level gauges, resistive level gauges, pressure level gauges, ultrasonic level gauges, magnetic float level gauges, radar level gauges, etc. According to the principle, all types of level gauges mentioned above can be used in the liquid level detection device of this application, and the appropriate liquid level detection device can be selected according to the actual use environment.

[0064] By electrically connecting the liquid level detection device to the controller, the liquid level height data in the atomizer 310 measured by the liquid level detection device can be transmitted to the controller, and the controller can determine whether it is necessary to control the atomizer 310 to spray and discharge the condensed water stored therein according to the current liquid level height.

[0065] Since a liquid level detection device for detecting the liquid level height of the atomizer 310 is provided, the liquid level in the atomizer 310 can be detected in real time, thereby preventing the condensed water from overflowing from the atomizer 310 and failing to discharge the condensed water in time. Furthermore, it can be avoided that the condensed water in the atomizer 310 is discharged when the condensed water content is too low, resulting in an insignificant cooling effect of the condensed water.

[0066] It should be noted that a storage container for storing condensed water is provided in the atomizer 310, and the storage container is connected to a nozzle and a pressure pump. The liquid level detection device is used to detect the liquid level of condensed water in the storage container. The controller achieves different degrees of atomization by controlling the opening and closing of the nozzle and the power of the pressure pump. When the condensed water needs to be atomized into finer particles, the power of the pressure pump is increased through the controller.

[0067] See also Figure 1 As shown, in some implementations, the drainage component 300 also includes a neutralization device 320, one side of the neutralization device 320 is connected to the condensing heat exchanger 200, and the other side of the neutralization device 320 is connected to the atomizer 310, and the condensed water in the atomizer 310 is the condensed water after acid and alkali neutralization by the neutralization device 320.

[0068] Since the condensed water in the condensing heat exchanger 200 is often weakly acidic, spraying it directly onto the outer surface of the combustion chamber 110 may corrode the metal on the outer surface of the combustion chamber 110 and shorten the service life of the combustion chamber 110 .

[0069] The neutralization device 320 neutralizes the acid and alkali of the condensed water, so that the condensed water in the atomizer 310 is all neutralized condensed water with low corrosiveness, thereby extending the service life of the combustion chamber 110.

[0070] See also Figure 1 As shown, the drainage assembly 300 further includes a conduit 330 connected to the bottom of the condensing heat exchanger 200, and the neutralizing device 320 is connected to the condensing heat exchanger 200 through the conduit 330. In order to prevent the conduit 330 from being corroded by the condensed water that has not been neutralized, it is made of high temperature and corrosion resistant materials.

[0071] See also Figure 1 As shown, in some implementations, the water heater also includes a shell 400, and the combustion component 100, the condensing heat exchanger 200 and the drainage component 300 are all arranged inside the shell 400; the shell 400 is equipped with an exhaust device, which is used to discharge the gas in the shell 400.

[0072] By arranging an exhaust device at the housing 400, the condensed water sprayed by the drainage device can be discharged from the housing 400 as water vapor, thereby preventing condensed water from forming in the housing 400 after the temperature drops. Among them, an exhaust port can be opened at the housing 400, and the exhaust device may include an exhaust fan 510 installed at the exhaust port. The exhaust fan 510 accelerates the gas flow rate in the housing 400 to guide the water vapor in the housing 400. It can be understood that the exhaust fan 510 can not only guide the gas in the housing 400, but also improve the cooling efficiency of the housing 400, thereby preventing the temperature of the housing 400 from being too high and affecting the user experience.

[0073] In some implementations, the controller may be electrically connected to the exhaust assembly 500, and the exhaust assembly 500 may be opened while the atomizer 310 sprays condensed water. After the atomizer sprays the condensed water toward the outer surface of the combustion chamber 110, the exhaust assembly 500 may be used to accelerate the gas flow rate in the housing 400, accelerate the evaporation rate of the condensed water on the outer surface of the combustion chamber 110, and take away the heat on the outer surface of the combustion chamber 110 more quickly.

[0074] See also Figure 1 As shown, in some implementations, the condensing heat exchanger 200 includes a condensing heat exchange chamber 210 , which is connected to the combustion chamber 110 , and the flue gas generated by the combustion in the combustion chamber 110 flows into the condensing heat exchange chamber 210 .

[0075] A first heat exchange tube is provided in the condensation heat exchange chamber 210, and the first heat exchange tube can utilize the high-temperature flue gas in the condensation heat exchange chamber 210 to heat the water in the first heat exchange tube, thereby utilizing the heat of the high-temperature flue gas. A second heat exchange tube is provided at the combustion chamber 110, and the second heat exchange tube is connected to the first heat exchange tube. In other words, the second heat exchange tube directly utilizes the heat of the combustion chamber 110 to heat the water in the second heat exchange tube. Since the first heat exchange tube is connected to the second heat exchange tube, the fluid therein undergoes two heat exchanges between the combustion chamber 110 and the condensation heat exchange chamber 210, which fully utilizes the heat of the gas combustion and improves the heating efficiency of the water heater.

[0076] See also Figure 1 As shown, the water heater also includes a water inlet pipe 610 and a water outlet pipe 620. The water inlet pipe 610 is connected to a second heat exchange pipe arranged at the combustion chamber 110. When water flows into the second heat exchange pipe through the water inlet pipe 610, the first heating of the water in the pipe is realized, and then the water in the second heat exchange pipe will flow into the first heat exchange pipe, and the high-temperature flue gas in the condensation heat exchange chamber 210 will be used to realize the second heating of the water. The water in the first heat exchange pipe will eventually flow into the water outlet pipe 620 connected to the first heat exchange pipe, and the heated water will be discharged for use by the user.

[0077] It is understandable that the second heat exchange tube can be disposed outside the combustion chamber 110, and by fitting the second heat exchange tube to the outer surface of the combustion chamber 110, the second heat exchange tube can receive the heat in the combustion chamber 110. In other implementations, the second heat exchange tube can also pass through the combustion chamber 110, so that the second heat exchange tube directly contacts the flame in the combustion chamber 110, thereby improving the heating efficiency of the second heat exchange tube.

[0078] See also Figure 1As shown, the water heater also includes a gas pipe 630, and the combustion assembly 100 also includes a burner. The gas pipe 630 is connected to the burner to pass the gas into the burner. An ignition mechanism is provided in the burner. The gas is ignited by the burner, so that the gas burns in the combustion chamber 110 to release a large amount of heat, thereby heating the water in the pipeline.

[0079] See also Figure 1 As shown, the water heater further includes a smoke exhaust pipe 640, which is connected to the condensation heat exchange chamber 210 to discharge the tail gas. The smoke exhaust pipe 640 can be integrated with a tail gas treatment component to absorb pollutants in the tail gas and reduce pollution to the atmospheric environment.

[0080] It is understandable that, although the present invention mainly describes the use of the drainage component 300 to drain the condensed water to the outer surface of the combustion chamber 110, in some implementations, a drainage branch can also be set outside the drainage component 300. And the drainage branch is connected to the drainage component 300. When the water heater is running at high power or it is detected that the temperature of the outer surface of the combustion chamber 110 exceeds the temperature threshold, the drainage component 300 is controlled to drain the condensed water to the outer surface of the combustion chamber 110. When the water heater is running at low power or it is detected that the temperature of the outer surface of the combustion chamber 110 is lower than the temperature threshold, the drainage component 300 is controlled to direct the condensed water therein to the drainage branch, and the condensed water is guided to the smoke exhaust pipe 640 through the drainage branch to avoid spraying condensed water to the outer surface of the combustion chamber 110 to affect the heating efficiency at the combustion chamber 110.

[0081] See also Figure 1 , Figure 4 as well as Figure 5 As shown, the controller can be integrated into the control panel of the water heater, and the control panel can be mounted on the outer surface of the housing 400 for user convenience. In order to control the flow of the water heater, a solenoid valve is provided at the water inlet pipe 610. In order to accurately control the heating temperature, a gas valve is provided at the gas pipe 630. The solenoid valve and the gas valve are both electrically connected to the controller, and the controller adjusts the opening of the gas valve according to the flow through the solenoid valve and the heating temperature set in the control panel, so that the air intake of the gas pipe 630 meets the heating temperature requirement.

[0082] In a third aspect, an embodiment of the present invention further provides a storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the control method of the water heater described above is performed.

[0083] The processor may include, but is not limited to, one or more processors or microprocessors, etc. Each processor may be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller, a microprocessor or other electronic components to execute the methods in the above embodiments.

[0084] The storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The computer-readable storage medium may include, but is not limited to, for example, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, computer storage media (such as hard disks, floppy disks, solid-state drives, removable disks, CD-ROMs, DVD-ROMs, Blu-ray disks, etc.).

[0085] The storage medium may also store at least one computer executable program / instruction, which may be, for example, a computer readable instruction. Computer readable storage media include, but are not limited to, for example, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory (cache), etc. Computer readable storage media may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, a non-transitory computer readable storage medium may be connected to a computing device such as a computer, and then, when the computing device runs the computer readable instructions stored on the computer readable storage medium, the various methods described above may be performed.

[0086] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for controlling a water heater, characterized in that: The following steps are involved: Determining whether a drainage component meets drainage conditions, wherein the drainage component is used to collect condensed water in a condensing heat exchanger; If the drainage condition is met, the drainage power of the drainage component is determined, and the drainage component is made to discharge the collected condensed water toward the outer surface of the combustion chamber at the drainage power; If the drainage conditions are not met, the drainage component is made non-draining; Wherein, the drainage component includes an atomizer, and the atomizer is used to atomize the collected condensed water and discharge it to the outer surface of the combustion chamber; The drainage condition includes that the water heater is started and the liquid level of the atomizer reaches a first liquid level, or the liquid level of the atomizer exceeds a second liquid level, wherein the second liquid level is higher than the first liquid level.

2. The control method according to claim 1, characterized in that: Determining the drainage power of the drainage component includes: Determine whether the water heater is started; If the water heater is started, determining the operating power of the atomizer according to the operating power of the water heater; If the water heater is not started, the operating power of the atomizer is set to the first power.

3. The control method according to claim 2, characterized in that: Determining the operating power of the atomizer according to the operating power of the water heater includes calculating the operating power of the atomizer according to the following formula: ， in, is the operating power of the atomizer, is the operating power of the water heater, is the rated power of the water heater, is the rated power of the atomizer, k is the proportionality coefficient, 0<k<1.

4. A water heater, characterized in that: It includes: A combustion assembly, the combustion assembly comprising a combustion chamber; a condensing heat exchanger, the condensing heat exchanger being in communication with the combustion chamber; A drainage component, the drainage component is connected to the condensing heat exchanger to collect condensed water, and the drainage port of the drainage component faces the outer surface of the combustion chamber to discharge the collected condensed water to the outer surface of the combustion chamber; as well as A controller, wherein the controller is electrically connected to the drainage component, and the controller is used to execute the control method as described in any one of claims 1-3.

5. The water heater according to claim 4, characterized in that: The drainage assembly includes an atomizer and a liquid level detection device, wherein the liquid level detection device is connected to the atomizer and is used to measure the liquid level height of the condensed water in the atomizer; The controller is electrically connected to the atomizer, and the controller is electrically connected to the liquid level detection device.

6. The water heater according to claim 5, characterized in that: The drainage component also includes a neutralization device, one side of the neutralization device is connected to the condensing heat exchanger, and the other side of the neutralization device is connected to the atomizer, and the condensed water in the atomizer is the condensed water after the acid and alkali are neutralized by the neutralization device.

7. The water heater according to any one of claims 4 to 6, characterized in that: The water heater further comprises a shell, wherein the combustion assembly, the condensing heat exchanger and the drainage assembly are all arranged inside the shell; The shell is equipped with an exhaust device, and the exhaust device is used to exhaust the gas in the shell.

8. The water heater according to any one of claims 4 to 6, characterized in that: The condensing heat exchanger comprises a condensing heat exchange chamber, the condensing heat exchange chamber is connected to the combustion chamber, and a first heat exchange tube is arranged in the condensing heat exchange chamber. A second heat exchange tube is disposed at the combustion chamber, and the second heat exchange tube is communicated with the first heat exchange tube.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method according to any one of claims 1 to 3 is implemented.

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