[0016] The anti-corrosion method for the inner tank of the water heater of the present invention aims at the solar water heater's outdoor collector with a thermoelectric generator and a Fresnel lens. The Fresnel lens can converge light to irradiate the thermoelectric generator. The hot end face of the thermoelectric generator The temperature rises sharply, so that the thermoelectric generator forms a large temperature difference to generate electricity. For the inner tank, the electric energy generated by the thermoelectric generator can be used to act on the inner tank of the solar water heater to form current for current anti-corrosion protection.
[0017] Specifically, in the daylight environment, the Fresnel lens uses sunlight to heat the hot end surface of the thermoelectric generator, so that the thermoelectric generator uses the temperature difference to generate electricity, and the electric energy generated by the thermoelectric generator can be used for the inner tank The current anti-corrosion treatment does not need to be equipped with magnesium rods in the inner tank, which can avoid the hardening of water quality due to the use of magnesium rods, and can also reduce the use cost of later users. Among them, the specific configuration of the current anti-corrosion treatment for the inner tank can refer to the current anti-corrosion arrangement in the prior art, which is not limited here. The present invention mainly uses the Fresnel lens to heat the thermoelectric generator by using sunlight to form The temperature difference is used to generate electricity, which provides power supply for current anti-corrosion.
[0018] Further, for different inner tanks, the set potential value E0 of trigger current anti-corrosion is obtained in the factory stage and stored in the electric control panel of the solar water heater, and the inner tank is correspondingly provided with a device for detecting the potential of the inner tank. The sensor, the specific anti-corrosion control process is as follows: the sensor detects the real-time potential value Et of the inner tank and transmits it to the electric control board, and the electric control board compares the detected real-time potential value Et with the stored set potential value E0, if Et> E0, it means that the inner tank has the possibility of anti-corrosion. At this time, the electric energy generated by the thermoelectric generator will be used for current anti-corrosion protection of the inner tank; and when the sensor detects the real-time potential value of the inner tank Et ≤ E0, the solar water heater Store the electrical energy generated by the thermoelectric generator.
[0019] The specific control methods for solar water heaters equipped with thermoelectric generators and batteries can be divided into the following two methods: The first method is that the electric energy generated by the thermoelectric generator is stored in the battery, and then the battery conducts current to the inner tank to prevent corrosion. Operation; The second method is that the electric energy generated by the thermoelectric generator directly performs current anti-corrosion operation on the inner tank, while the remaining electric energy is stored in the battery, and the battery assists the current anti-corrosion operation on the inner tank as needed.
[0020] The first anti-corrosion control method is: the electric energy generated by the thermoelectric generator is stored in the battery; if Et> E0, the battery discharges current anti-corrosion protection for the inner tank. Specifically, in an environment with sunlight during the day, the thermoelectric generator generates electricity, and the generated electric energy is first stored in the battery, and the electric control board controls whether the battery performs discharge operation according to the real-time potential value Et detected by the sensor. And in the anti-corrosion process, in Et> In the case of E0, as the difference between Et and E0 increases, the electric energy that the battery applies to the inner tank increases.
[0021] The control method for the second type of anti-corrosion is: if Et> E0, the electric energy generated by the thermoelectric generator directly protects the inner tank against corrosion; if Et≤E0, the electric energy produced by the thermoelectric generator is stored in the battery. Specifically, the electric control panel of the solar water heater controls the thermoelectric generator to directly perform current anti-corrosion treatment on the inner container according to the real-time potential value Et of the inner container detected by the sensor, or stores electric energy in the battery. Preferably, in order to make more reasonable use of the electrical energy generated by the thermoelectric generator, the real-time voltage value generated by the thermoelectric generator is Ut, and the potential difference of the inner tank ΔU=E t-E0; when Ut> At ΔU, the electric energy generated by the thermoelectric generator meets the current anti-corrosion protection of the inner tank, while the remaining electric energy charges the battery. This way, while ensuring the effective current anti-corrosion treatment of the inner tank, it can also be effective More importantly, it can avoid hydrogen embrittlement caused by excessive current generated by the excessive voltage applied to the inner tank, which is more conducive to improving the anti-corrosion effect. When Ut
[0022] Based on the above two control methods, the thermoelectric generator cannot generate electricity at night or under rainy weather conditions. At this time, if Et> E0, the electric energy of the battery is used for current anti-corrosion protection of the inner tank. Specifically, when the thermoelectric generator does not generate electrical energy, the battery supplies power to the inner tank for current anti-corrosion protection, so as to ensure that the inner tank maintains a long-term anti-corrosion state. Preferably, the heat collector is provided with a heat conducting element, and the end of the heat conducting element exposed outside the heat collector is connected to the hot end face of the thermoelectric generator; the thermoelectric generator uses the temperature difference between the water temperature in the collector and the ambient temperature Generate electricity and charge the battery. Specifically, in the case of light, the hot end face of the thermoelectric generator is irradiated by the Fresnel lens and heated to a higher temperature. At this time, the temperature of the hot end face of the thermoelectric generator will be greater than the water temperature in the collector. The thermoelectric generator uses the temperature difference for efficient power generation; and in the absence of light, on the one hand, the electric energy stored in the battery can be used to continue the anti-corrosion treatment of the inner tank. At the same time, the hot end of the thermoelectric generator is heated by the heat conducting element to form a temperature difference To continue to generate electricity to effectively prolong the anti-corrosion protection time of the inner tank. In the absence of light, the electric energy output by the battery and the thermoelectric generator cannot meet the anti-corrosion requirements of the inner tank, if Et> E0, the electric control board charges the battery through the mains power to ensure that the inner tank always gets good current anti-corrosion protection.
[0023] Compared with the prior art, the advantages and positive effects of the present invention are: the thermoelectric generator is irradiated through the Fresnel lens, so that the temperature of the hot end face of the thermoelectric generator is increased to form a larger temperature difference for power generation, and the thermoelectric generator The generated electric energy can perform current anti-corrosion treatment on the inner tank, so that there is no need to use magnesium rods for anti-corrosion, avoid hardening of water quality, improve bathing experience and reduce usage costs, and effectively improve user experience.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions recorded in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
