Preparation method of water heater inner container with antibacterial property

Abstract

The invention belongs to the technical field of water heater inner container manufacturing, and particularly relates to a preparation method of an antibacterial water heater inner container, which comprises the following steps: weighing antibacterial metal and a carrier, and loading the antibacterial metal on the carrier through a physical adsorption ion exchange method to prepare an antibacterial agent; grinding the weighed salt-based substances, and sieving by a filter screen to obtain enamel glaze powder in a preset granularity range; the water heater inner container is pretreated, and a clean water heater inner container is obtained; the weighed antibacterial agent and the weighed enamel glaze powder are placed in a solvent to be mixed and stirred, and antibacterial glaze slurry is obtained; the clean water heater inner container is coated with the antibacterial glaze slurry and fired, and the water heater inner container with the antibacterial property is obtained. The water heater inner container with the antibacterial property is prepared by coating the antibacterial glaze slurry on the water heater inner container, and the water heater inner container with the antibacterial property has the antibacterial property, so that the problem that the water heater inner container is easy to breed bacteria and fungi is solved.

Description

Technical Field

[0001] The invention relates to the technical field of water heater inner tank manufacturing, and in particular to a method for preparing a water heater inner tank with antibacterial properties. Background Art

[0002] At present, the inner tank of a water heater is prone to breeding microorganisms such as bacteria and fungi during use, thereby affecting the water quality and the health of users. In order to solve the problem that the inner tank of a water heater is prone to breeding bacteria and fungi, the existing technology is to coat the inner tank of the water heater with an enamel layer, and use the enamel layer to protect the metal blank, thereby reducing the problem of breeding bacteria and fungi due to corrosion of the metal blank. However, the enamel layer produced based on the existing process has insufficient antibacterial performance, and it only temporarily alleviates the breeding of bacteria and fungi.

[0003] Therefore, how to effectively prevent the growth of bacteria and fungi in the inner tank of the water heater is a problem that urgently needs to be solved. Summary of the invention

[0004] The invention provides a method for preparing an antibacterial water heater inner tank, so as to solve the problem that bacteria and fungi are easily bred in the water heater inner tank.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides a method for preparing a water heater tank with antibacterial properties, the method comprising:

[0006] Taking weighed antibacterial metal and carrier, loading the antibacterial metal on the carrier by physical adsorption ion exchange method to prepare an antibacterial agent;

[0007] Take a weighed amount of salt-based material, grind it and pass it through a sieve to obtain enamel powder within a preset particle size range;

[0008] Pre-treating the water heater inner tank to obtain a clean water heater inner tank;

[0009] The weighed antibacterial agent and the enamel powder are placed in a solvent and mixed and stirred to obtain an antibacterial enamel slurry;

[0010] The antibacterial glaze slurry is applied to the clean water heater inner tank and fired to obtain the water heater inner tank with antibacterial properties.

[0011] Furthermore, the weighed antibacterial agent and the enamel powder are placed in a solvent and mixed and stirred to obtain an antibacterial enamel slurry, comprising:

[0012] Adding a first weight of the enamel powder and a weighed amount of the antibacterial agent into a solvent and stirring the mixture for a first period of time to obtain a first mixed solution;

[0013] Adding a second weight of the enamel powder into the first mixed solution and continuously stirring to obtain a second mixed solution;

[0014] Taking a weighed amount of auxiliary agent and dissolving it in a solvent to obtain an auxiliary agent solution; wherein the auxiliary agent is used to adjust the adsorption amount of the antibacterial glaze slurry;

[0015] Mixing the auxiliary agent solution with the second mixed solution to obtain a third mixed solution;

[0016] The third mixed liquid is adjusted to obtain an antibacterial glaze slurry.

[0017] Further, the debugging of the third mixed solution includes:

[0018] measuring the volume of the third mixed liquid to obtain a first volume;

[0019] Determining whether the first capacity is within a preset capacity range;

[0020] If not, adding a preset solvent to the third mixed solution for adjustment and measuring the capacity to obtain a second capacity;

[0021] When the second volume is within the preset volume range, volume adjustment is stopped to obtain a fourth mixed liquid.

[0022] Furthermore, after obtaining the fourth mixed solution, the method further comprises:

[0023] measuring the adsorption amount of the fourth mixed liquid to obtain adsorption data;

[0024] Determining whether the adsorption data is within a preset adsorption amount range;

[0025] If the adsorption data is greater than the preset adsorption amount range, adding the first auxiliary agent to the fourth mixed liquid for adjustment until the adsorption data of the fourth mixed liquid is within the preset adsorption amount range, thereby obtaining an antibacterial glaze slurry;

[0026] If the adsorption data is less than the preset adsorption amount range, a second auxiliary agent is added to the fourth mixed liquid for adjustment until the adsorption data of the fourth mixed liquid is within the preset adsorption amount range to obtain an antibacterial glaze slurry.

[0027] Furthermore, the pretreatment of the water heater tank to obtain a clean water heater tank includes:

[0028] Grind and clean the outer surface of the water heater tank; and,

[0029] The inner surface of the water heater tank is polished and cleaned to obtain a clean water heater tank.

[0030] Furthermore, the antibacterial glaze slurry is applied to the clean water heater inner tank and fired to obtain the water heater inner tank with antibacterial properties, comprising:

[0031] The antibacterial glaze slurry is applied to the clean water heater inner tank, dried at a first preset temperature for a first preset time, and then transferred to a firing device and fired at a second preset temperature for a second preset time to obtain an antibacterial water heater inner tank.

[0032] Furthermore, the first preset temperature ranges from 100°C to 135°C; the first preset time ranges from 30min to 60min; the second preset temperature ranges from 800°C to 1200°C; the second preset time ranges from 5min to 25min.

[0033] Furthermore, after obtaining the water heater inner tank with antibacterial properties, the method further comprises:

[0034] The antibacterial water heater liner is tested for adhesion, hot water erosion resistance, temperature shock resistance, acid erosion resistance and alkali erosion resistance

[0035] Furthermore, the first auxiliary agent is sodium α-glucoheptonate, and the second auxiliary agent is sodium nitrite.

[0036] Furthermore, the antibacterial metal includes any one or more of silver ions, copper ions and zinc ions, and the carrier includes zirconium phosphate.

[0037] Beneficial effects: In the present application, a weighed antibacterial metal and a carrier are taken, and the antibacterial metal is loaded on the carrier by a physical adsorption ion exchange method to prepare an antibacterial agent; and a weighed salt-based substance is taken, ground and passed through a filter screen to obtain an enamel glaze powder within a preset particle size range; the water heater tank is pretreated to obtain a clean water heater tank; then, the weighed antibacterial agent and the enamel glaze powder are placed in a solvent for mixing and stirring to obtain an antibacterial glaze slurry; finally, the antibacterial glaze slurry is applied to the clean water heater tank and fired to obtain an antibacterial water heater tank; the antibacterial water heater tank has antibacterial properties, which can effectively solve the problem that the water heater tank is prone to breeding bacteria and fungi. The antibacterial glaze slurry is made of an antibacterial agent and enamel glaze powder, so that the water heater tank has good antibacterial properties, which can effectively inhibit the growth and reproduction of microorganisms such as bacteria and fungi, improve water quality, and protect user health. Limiting the particle size of the enamel glaze powder within a certain range can improve the quality of the water heater tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic flow chart of a method for preparing a water heater inner tank with antibacterial properties according to the present invention;

[0039] Figure 2 The figure is a schematic diagram of the process of preparing the antibacterial glaze slurry of the present invention;

[0040] Figure 3 It is a schematic diagram of the process of debugging the third mixed solution according to the present invention.

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "a", "an", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of features, integers, steps, operations, elements, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any module and all combinations of one or more associated listed items.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as herein.

[0045] Reference Figure 1 The embodiment of the present invention provides a method for preparing an antibacterial water heater tank, comprising the following steps S1-S4:

[0046] S1: taking weighed antibacterial metal and carrier, and loading the antibacterial metal on the carrier by physical adsorption ion exchange method to prepare an antibacterial agent.

[0047] In this embodiment, in order to improve the antibacterial effect of the antibacterial enamel layer of the water heater inner tank, an antibacterial agent is added to the prepared enamel layer, and the antibacterial agent is composed of a carrier and a metal powder or metal ion with antibacterial ability, wherein the carrier is any one or more of fluorite, silica gel, zirconium phosphate, zeolite, and silicate, and the carrier has a porous structure. The metal powder or metal ions are loaded in the pores by a physical adsorption ion exchange method, thereby preparing an antibacterial agent with antibacterial properties; the metal powder or metal ion with antibacterial ability is any one or more of silver, copper and zinc, wherein silver ions have strong penetrability and can directly act on the inside of microorganisms, destroy their DNA structure, and hinder the replication of the genetic information of microorganisms, including hindering the synthesis of DNA and RNA and the transcription of mRNA from DNA templates, thereby fundamentally inhibiting the reproduction and growth of microorganisms and causing their death, and silver ions can play a good bactericidal effect at a very low concentration, and have significant inhibitory and killing effects on a variety of microorganisms such as bacteria and fungi. Copper ions can destroy the cell membrane, cell wall and enzyme system of pathogenic microorganisms. When copper ions come into contact with bacteria and other microorganisms, they will cause a short circuit in the bacterial cell membrane, weaken the cell membrane and create holes, causing the bacterial cytoplasm to overflow, causing the cells to lose necessary nutrients and water, and eventually causing the bacteria to shrink and die. In addition, copper ions can inhibit the growth of algae, and zinc ions can bind to bacterial enzymes or membrane proteins to destroy the structure and function of bacteria, thereby achieving the purpose of sterilization or inhibiting bacterial growth. Zinc ions can also affect the bacterial cell membrane and genetic material, such as destroying the bacterial cell membrane, causing the bacterial contents to leak, and affecting the normal replication and transcription of bacterial genetic material, playing an antibacterial role.

[0048] In order to achieve all-round protection and improve the synergistic effect of antibacterial effect, in one embodiment, the antibacterial metal is preferably a metal powder or metal ion mixed with silver, copper and zinc. Specifically, although silver ions have strong antibacterial ability, they may not have ideal antibacterial effects on certain types of bacteria or under certain special environments; the addition of copper ions and zinc ions can play a role in bacterial species with weak silver ion effects, thereby expanding the overall antibacterial spectrum and enabling the composite antibacterial system to cope with more types of microorganisms; and the silver ion antibacterial agent has a sustained release property and can continuously release silver ions for a long time to exert antibacterial effects; when copper ions and zinc ions work synergistically with silver ions, on the one hand, the stability of silver ions on the surface of the material or in the environment can be enhanced, and the loss or inactivation of silver ions can be reduced; on the other hand, copper ions and zinc ions themselves also have certain long-term antibacterial properties, and the three can work together to prolong the duration of the antibacterial effect; when microorganisms face the attack of external antibacterial substances, they will activate their own defense mechanism to resist, and silver ions mainly attack the genetic material and metabolic system of microorganisms, and copper ions and zinc ions can interfere with the defense system of microorganisms from different angles. For example, zinc ions may affect the permeability of microbial cell membranes, making it more difficult for microbial cells to resist the entry of silver ions and copper ions, thereby enhancing the bactericidal effect of silver ions and copper ions.

[0049] S2: Take a weighed amount of salt-based material, grind it, and pass it through a filter to obtain enamel powder within a preset particle size range.

[0050] A glassy substance of an alkali-borosilicate system is used as the enamel glaze. Specifically, a required weight of the salt-based substance is weighed and ground in a grinding device, wherein the grinding method can be dry grinding or wet grinding, that is, the salt-based substance is ground in a dry state, or the salt-based substance is ground in a wet state to obtain salt-based substance powder, and then the salt-based substance powder is placed in a filtration device, in which sieving components with different aperture standards are provided. The enamel glaze powder of the required particle size is sifted out by the sieving component, and then the enamel glaze powder within a preset particle size range is obtained, and the enamel glaze powder will be used for coating on a metal blank later.

[0051] S3: pre-treating the water heater inner tank to obtain a clean water heater inner tank.

[0052] In order to increase the adhesion of the enamel layer on the water heater inner tank, the metal blank of the water heater inner tank needs to be pretreated, wherein the pretreatment of the metal blank of the water heater inner tank includes grinding and cleaning the outer surface of the water heater inner tank and polishing and cleaning the inner surface of the water heater inner tank to remove rust, stains and welding slag on the metal blank of the water heater inner tank, thereby obtaining a clean and smooth water heater inner tank, which is beneficial to improving the adhesion of the applied enamel glaze.

[0053] S4: taking the weighed antibacterial agent and the enamel powder, placing them in a solvent and mixing them to obtain an antibacterial enamel slurry.

[0054] After the antibacterial agent and enamel glaze powder are prepared, the antibacterial agent and the enamel glaze powder are mixed to prepare an antibacterial glaze slurry. Specifically, first, a first weight of enamel glaze powder and a weighed antibacterial agent are added to a solvent and stirred to obtain a first mixed solution after stirring for a first period of time. Then, a second weight of enamel glaze powder is added to the first mixed solution and stirred continuously to obtain a second mixed solution, wherein the enamel glaze powder is added and mixed in two times, which is conducive to the full mixing of the enamel glaze powder and the antibacterial agent; after the enamel glaze powder and the antibacterial agent are fully mixed, an auxiliary agent solution is also added, wherein the auxiliary agent solution is added to adjust the adsorption amount of the antibacterial glaze slurry on the inner tank of the water heater, thereby improving the adhesion of the enamel layer, and the third mixed solution with the auxiliary agent solution added is stirred evenly and the capacity and adsorption amount are adjusted to obtain an antibacterial glaze slurry with antibacterial properties.

[0055] S5, applying the antibacterial glaze slurry to the clean water heater inner tank and firing it to obtain the water heater inner tank with antibacterial properties.

[0056] After obtaining the antibacterial glaze slurry, the antibacterial glaze slurry is coated on the pre-treated clean water heater inner tank, and after coating, the water heater inner tank is dried and fired to make the porcelain glaze layer firmly bonded to the metal blank of the water heater inner tank, thereby obtaining a porcelain glaze layer attached to the water heater inner tank. The porcelain glaze layer has antibacterial properties and can protect the metal blank of the water heater inner tank to prevent the growth of bacteria and fungi.

[0057] This embodiment provides a method for preparing a water heater inner tank with antibacterial properties, comprising taking a weighed amount of antibacterial metal and a carrier, and loading the antibacterial metal on the carrier by a physical adsorption ion exchange method to prepare an antibacterial agent; and taking a weighed amount of a salt-based substance, grinding it and passing it through a filter screen to obtain an enamel glaze powder within a preset particle size range; pre-treating the water heater inner tank to obtain a clean water heater inner tank; then, taking a weighed amount of the antibacterial agent and the enamel glaze powder, mixing and stirring them in a solvent to obtain an antibacterial glaze slurry; finally, applying the antibacterial glaze slurry to the clean water heater inner tank and firing it to obtain an antibacterial water heater inner tank; the antibacterial water heater inner tank has antibacterial properties, which can effectively solve the problem that the water heater inner tank is prone to breeding bacteria and fungi. The antibacterial glaze slurry is made of an antibacterial agent and enamel glaze powder, so that the water heater inner tank has good antibacterial properties, which can effectively inhibit the growth and reproduction of microorganisms such as bacteria and fungi, improve water quality, and protect the health of users. Limiting the particle size of the enamel glaze powder within a certain range can improve the quality of the water heater inner tank.

[0058] In one embodiment, Figure 2As shown, the weighed antibacterial agent and the enamel powder are placed in a solvent and mixed and stirred to obtain an antibacterial enamel slurry, including:

[0059] S41, adding a first weight of the enamel powder and a weighed amount of the antibacterial agent into a solvent and stirring the mixture, and obtaining a first mixed solution after stirring for a first period of time.

[0060] The solvent is pure water; the amount of enamel glaze powder and antibacterial agent added is calculated according to the weight of the required antibacterial glaze slurry. For example, the weight of the required antibacterial glaze slurry is 100 kg, and the weights of pure water, enamel glaze powder and antibacterial agent are weighed according to the mass ratio of pure water: enamel glaze powder: antibacterial agent = 3:10:1. Among them, since the amount of enamel glaze powder used is greater than that of the antibacterial agent, in order to make the slurry prepared by the enamel glaze powder and the antibacterial agent mixed evenly, the enamel glaze powder is added in multiple times, that is, the total weight of the enamel glaze powder used is weighed out in equal or unequal proportions, and then mixed with the antibacterial agent in multiple additions to ensure that the enamel glaze powder and the antibacterial agent are evenly mixed.

[0061] S42, adding a second weight of the enamel powder to the first mixed solution and continuously stirring to obtain a second mixed solution.

[0062] S43, taking a weighed amount of auxiliary agent and dissolving it in a solvent to obtain an auxiliary agent solution; wherein the auxiliary agent is used to adjust the adsorption amount of the antibacterial glaze slurry;

[0063] The auxiliary agent is sodium a-glucoheptonate and / or sodium nitrite, which is used to adjust the adsorption amount of the antibacterial glaze slurry; when using the auxiliary agent, the auxiliary agent must be dissolved in pure water and then added to the antibacterial glaze slurry to ensure that the auxiliary agent solution is fully mixed with the antibacterial glaze slurry.

[0064] S44, mixing the auxiliary agent solution with the second mixed solution to obtain a third mixed solution;

[0065] S45, debugging the third mixed liquid to obtain antibacterial glaze slurry.

[0066] As described above, the debugging of the mixed liquid includes capacity debugging and adsorption amount debugging, and the preparation of the antibacterial glaze slurry includes weighing the antibacterial agent, enamel glaze powder and auxiliary agent according to a preset ratio, dissolving them in pure water and stirring them evenly, wherein the mass ratio of pure water: enamel glaze powder: antibacterial agent: auxiliary agent = 3:10:1:0.01; based on the fact that the amount of enamel glaze powder is greater than that of the antibacterial agent and the auxiliary agent, in order to make the slurry prepared by the enamel glaze powder and the antibacterial agent mixed evenly, the enamel glaze powder is added in multiple times, that is, first take an appropriate amount of enamel glaze powder and mix it with pure water and antibacterial agent, and then add the remaining amount of enamel glaze powder to the mixed liquid for secondary mixing after the mixing is evenly mixed to obtain a slurry in which the enamel glaze powder and the antibacterial agent are evenly mixed, and then add the auxiliary agent solution dissolved in pure water in advance to the slurry to obtain the antibacterial glaze slurry. In one embodiment, taking the preparation of 100 kg of antibacterial glaze slurry as an example, 75 kg of pure water is pre-added in a stirring barrel used to prepare the slurry and the stirring system is turned on, wherein the stirring condition is 0.3 MPa to 0.4 MPa air pressure stirring, 25 kg of enamel glaze powder and 10 kg of antibacterial agent are added under stirring and stirred for 30 min to obtain a first mixed liquid; then 225 kg of enamel glaze powder is added to the first mixed liquid under stirring and stirred to obtain a second mixed liquid, wherein, if glaze powder is not stirred in the mixed liquid during continuous stirring of the stirring barrel, a stirring stick can be used to assist in stirring to avoid uneven stirring of the enamel glaze powder. Use an electronic balance to weigh 7.5 g of sodium a-glucoheptonate, pour it into a beaker, and add 50 ml of pure water to stir and dissolve. After the sodium a-glucoheptonate is completely dissolved, pour it into the stirring bucket that makes the second mixed liquid and stir it. Stirring is required after 6 hours and then stop stirring. The slurry is placed to age, wherein the aging time is 8 hours to 48 hours. The aged glaze slurry is quickly stirred for 1 hour to obtain the third mixed liquid. The third mixed liquid is debugged for capacity and adsorption to obtain an antibacterial glaze slurry.

[0067] In one embodiment, Figure 3 As shown, the above-mentioned debugging of the third mixed solution includes:

[0068] S451, measuring the volume of the third mixed liquid to obtain a first volume;

[0069] S452, determining whether the first capacity is within a preset capacity range;

[0070] S453, if not, adding a preset solvent to the third mixed liquid for adjustment and measuring the capacity to obtain a second capacity;

[0071] S454: When the second capacity is within the preset capacity range, stop capacity adjustment to obtain a fourth mixed liquid.

[0072] As mentioned above, although the enamel glaze powder and the antibacterial agent are mixed into a slurry according to a preset ratio, after the slurry is stirred for a long time, the solvent (pure water) in the slurry may evaporate and be lost due to stirring, so that there is an error between the configured slurry capacity and the preset capacity. To solve this error, the capacity can be adjusted by adding a small amount of pure water to the slurry. Specifically, first, the initial capacity of the slurry (third mixed liquid) prepared by mixing the enamel glaze powder and the antibacterial agent according to the preset ratio is measured, that is, the first capacity is obtained, and the first capacity is compared with the preset capacity range to determine whether the first capacity is within the preset capacity range, wherein the preset capacity range is set to 1.88g / ml to 1.90g / ml. If the first capacity is within the preset capacity range, it indicates that the solvent lost in the slurry does not affect its capacity, and the third mixed liquid prepared by mixing the enamel glaze powder and the antibacterial agent according to the preset ratio does not need to be adjusted in capacity. If the first capacity is not within the preset capacity range, it indicates that the lost solvent in the slurry has affected its capacity. A small amount of pure water can be added to the slurry to supplement the capacity of the slurry, thereby obtaining a slurry that meets the requirements (the fourth mixed solution). In one embodiment, the slurry prepared by mixing enamel powder and antibacterial agent in a preset proportion will be transferred to a supply barrel for standby use for ease of use. Before the slurry is injected into the supply barrel, the historical residual glaze slurry in the supply barrel, the recovery tank, and the pipeline needs to be cleaned up, and then the slurry is injected into the supply barrel, and the slurry bulk density is measured. If the measured capacity is less than the range of 1.88g / ml to 1.90g / ml, water is added according to the bulk density measurement data. To avoid excessive addition of water and affecting the slurry capacity, the amount of water added to the slurry at a single time shall not exceed 2kg, and water is added to the slurry while stirring so that the water and the slurry are evenly mixed. After stirring evenly, the bulk density of the slurry is measured. If the bulk density reaches the range of 1.88g / ml to 1.90g / ml, the slurry is no longer supplemented with water, thereby obtaining a fourth mixed liquid that meets the capacity requirements.

[0073] In one embodiment, after obtaining the fourth mixed solution, the method further comprises:

[0074] S455, measuring the adsorption amount of the fourth mixed liquid to obtain adsorption data;

[0075] S456, determining whether the adsorption data is within a preset adsorption amount range;

[0076] S457, if the adsorption data is greater than the preset adsorption amount range, adding the first auxiliary agent to the fourth mixed liquid for adjustment until the adsorption data of the fourth mixed liquid is within the preset adsorption amount range, thereby obtaining an antibacterial glaze slurry;

[0077] S458. If the adsorption data is less than the preset adsorption amount range, a second auxiliary agent is added to the fourth mixed liquid for adjustment until the adsorption data of the fourth mixed liquid is within the preset adsorption amount range to obtain an antibacterial glaze slurry.

[0078] As described above, after the bulk density of the slurry is adjusted, the adsorption amount of the slurry is also measured. Specifically, the initial adsorption amount of the fourth mixed liquid is measured to obtain adsorption data; and the adsorption data is compared with the preset adsorption amount range to determine whether the adsorption amount of the slurry meets the requirements, wherein the preset adsorption amount range is 22g to 24g; if the adsorption data is greater than 24g, the slurry is adjusted with sodium a-glucoheptonic acid; wherein the sodium a-glucoheptonic acid added at a time is 1g, and the sodium a-glucoheptonic acid is pre-dissolved in a small amount of water and then added to the slurry; if the adsorption data is less than 22g, it is adjusted with a saturated solution of sodium nitrite. The slurry adjusted with sodium a-glucoheptonic acid or sodium nitrite is measured again for its adsorption data. When its adsorption data is within the preset adsorption amount range, it is determined that the slurry meets the requirements for adsorption amount. After the adsorption amount is adjusted, the slump and dripping time of the slurry are also measured, wherein the preset dripping time is 7-9s, the slump is 155-165mm, and the slump and dripping time are measured by any feasible measurement method, which is not limited here. After the bulk density, adsorption amount, slump, and dripping time are measured and prepared, the antibacterial glaze slurry that meets the requirements can be prepared.

[0079] In one embodiment, the above-mentioned pretreatment of the water heater tank to obtain a clean water heater tank includes:

[0080] Grind and clean the outer surface of the water heater tank; and,

[0081] The inner surface of the water heater tank is polished and cleaned to obtain a clean water heater tank.

[0082] As mentioned above, the metal blank of the water heater tank may be attached with stains such as rust, welding slag, and weld nodules. In order to ensure that the surface of the metal blank of the water heater tank is clean and flat to improve the adhesion of the enamel glaze, the metal blank of the water heater tank needs to be pretreated, wherein the pretreatment includes grinding and polishing. Specifically, the outer surface of the water heater tank is polished and cleaned to remove iron filings, rust, oxide scale and dirt. The inner surface of the water heater tank is polished and cleaned so that the weld nodules on the inner and outer surfaces of the water heater tank are polished and smoothed. The grinding of the weld nodules is to prevent the raised enamel from being difficult to adhere to and causing deglazing; and the inner surface is sandblasted to ensure the inner surface roughness, wherein Rz>25μm, Ra>3μm, and cleanliness ≥Sa2.5 (near white level cleaning), thereby increasing the inner surface roughness, which is conducive to better and more adhesion of the glaze slurry to the metal blank of the water heater tank.

[0083] In one embodiment, the antibacterial glaze slurry is applied to the clean water heater inner tank and fired to obtain the water heater inner tank with antibacterial properties, including:

[0084] The antibacterial glaze slurry is applied to the clean water heater inner tank, dried at a first preset temperature for a first preset time, and then transferred to a firing device and fired at a second preset temperature for a second preset time to obtain an antibacterial water heater inner tank.

[0085] As described above, the antibacterial glaze slurry is applied to the clean water heater inner tank and dried at a temperature of 100°C to 135°C for 30min to 60min. Then, the lower pipe mouth of the water heater is enameled to protect the tooling including electric heating, water inlet and outlet, electronic anode port, magnesium rod port, etc. Finally, it is fired at a temperature of 800°C to 1200°C for 5min to 25min to obtain an antibacterial water heater inner tank.

[0086] In one embodiment, the first preset temperature ranges from 100°C to 135°C; the first preset time ranges from 30min to 60min; the second preset temperature ranges from 800°C to 1200°C; the second preset time ranges from 5min to 25min.

[0087] As mentioned above, the water heater inner tank coated with the antibacterial glaze slurry is dried at 100°C to 135°C for 30min to 60min in order to make the antibacterial glaze adhere to the water heater inner tank and prevent it from falling off. If the drying temperature is less than 100°C, a longer drying time is required, which in turn affects the preparation efficiency of the water heater inner tank with antibacterial properties. If the drying temperature is greater than 135°C, the drying process is likely to cause cracking of the porcelain glaze layer and produce defective products. If the drying time is less than 30min, the antibacterial glaze layer may not be dried. If the drying time is greater than 60min, the antibacterial glaze may be damaged. Over-drying of the glaze layer causes cracking of the glaze layer and produces defective products; the inner tank of the water heater after drying is transferred to the firing equipment so that the glaze layer is firmly attached to the inner tank to obtain a high-adhesion glaze layer. Among them, if the firing equipment is a model above 400L, the firing temperature is 800℃, and the firing time needs to be greater than 12min. If the firing temperature is 840℃, the firing time is not less than 6min. If the firing equipment is a model below 400L, the firing temperature is 800℃, and the firing time needs to be greater than 9min. If the firing temperature is 840℃, the firing time is not less than 6min.

[0088] In one embodiment, after obtaining the water heater inner tank with antibacterial properties, the method further comprises:

[0089] The antibacterial water heater inner tank is tested for adhesion, hot water erosion resistance, temperature sudden change resistance, acid erosion resistance and alkali erosion resistance.

[0090] As mentioned above, in order to ensure that the antibacterial water heater liner has antibacterial properties, it is also necessary to conduct tests on the adhesion, hot water erosion resistance, temperature shock resistance, acid erosion resistance and alkali erosion resistance of the antibacterial water heater liner. At the same time, it is also necessary to observe whether there are adverse phenomena such as fish scale explosion on the surface of the liner to ensure that the quality of the liner meets the requirements.

[0091] The embodiment of the present invention also provides a device for preparing a water heater inner tank with antibacterial properties, comprising:

[0092] The first preparation module 10 is used to take weighed antibacterial metal and carrier, and load the antibacterial metal on the carrier by physical adsorption ion exchange method to prepare an antibacterial agent;

[0093] The second preparation module 20 is used to grind the weighed salt-based material and pass it through a filter to obtain enamel powder within a preset particle size range;

[0094] A pre-treatment module 30 is used to pre-treat the water heater inner tank to obtain a clean water heater inner tank;

[0095] The third preparation module 40 is used to take the weighed antibacterial agent and the enamel powder, place them in a solvent, mix and stir to obtain an antibacterial enamel slurry;

[0096] The fourth preparation module 50 is used to apply the antibacterial glaze slurry to the clean water heater inner tank and fire it to obtain the water heater inner tank with antibacterial properties.

[0097] As described above, the device for preparing a water heater tank with antibacterial properties can realize a method for preparing a water heater tank with antibacterial properties.

[0098] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preparing a water heater tank with antibacterial properties, characterized in that: The method comprises: Taking weighed antibacterial metal and carrier, loading the antibacterial metal on the carrier by physical adsorption ion exchange method to prepare an antibacterial agent; Take a weighed amount of salt-based material, grind it and pass it through a sieve to obtain enamel powder within a preset particle size range; Pre-treating the water heater inner tank to obtain a clean water heater inner tank; The weighed antibacterial agent and the enamel powder are placed in a solvent and mixed and stirred to obtain an antibacterial enamel slurry; The antibacterial glaze slurry is applied to the clean water heater inner tank and fired to obtain the water heater inner tank with antibacterial properties.

2. The method for preparing the water heater inner tank with antibacterial properties according to claim 1, characterized in that: The weighed antibacterial agent and the enamel powder are placed in a solvent and mixed and stirred to obtain an antibacterial enamel slurry, comprising: Adding a first weight of the enamel powder and a weighed amount of the antibacterial agent into a solvent and stirring the mixture for a first period of time to obtain a first mixed solution; Adding a second weight of the enamel powder into the first mixed solution and continuously stirring to obtain a second mixed solution; Taking a weighed amount of auxiliary agent and dissolving it in a solvent to obtain an auxiliary agent solution; wherein the auxiliary agent is used to adjust the adsorption amount of the antibacterial glaze slurry; Mixing the auxiliary agent solution with the second mixed solution to obtain a third mixed solution; The third mixed liquid is adjusted to obtain an antibacterial glaze slurry.

3. The method for preparing the water heater inner tank with antibacterial properties according to claim 2, characterized in that: The step of debugging the third mixed solution comprises: measuring the volume of the third mixed liquid to obtain a first volume; Determining whether the first capacity is within a preset capacity range; If not, adding a preset solvent to the third mixed solution for adjustment and measuring the capacity to obtain a second capacity; When the second volume is within the preset volume range, volume adjustment is stopped to obtain a fourth mixed liquid.

4. The method for preparing the water heater inner tank with antibacterial properties according to claim 3, characterized in that: After obtaining the fourth mixed solution, the method further comprises: measuring the adsorption amount of the fourth mixed liquid to obtain adsorption data; Determining whether the adsorption data is within a preset adsorption amount range; If the adsorption data is greater than the preset adsorption amount range, adding the first auxiliary agent to the fourth mixed liquid for adjustment until the adsorption data of the fourth mixed liquid is within the preset adsorption amount range, thereby obtaining an antibacterial glaze slurry; If the adsorption data is less than the preset adsorption amount range, a second auxiliary agent is added to the fourth mixed liquid for adjustment until the adsorption data of the fourth mixed liquid is within the preset adsorption amount range to obtain an antibacterial glaze slurry.

5. The method for preparing the water heater inner tank with antibacterial properties according to claim 1, characterized in that: The method of pre-treating the inner tank of the water heater to obtain a clean inner tank of the water heater comprises: Grind and clean the outer surface of the water heater tank; and, The inner surface of the water heater tank is polished and cleaned to obtain a clean water heater tank.

6. The method for preparing the water heater inner tank with antibacterial properties according to claim 1, characterized in that: The method of applying the antibacterial glaze slurry to the clean water heater inner tank and firing the clean water heater inner tank to obtain the water heater inner tank with antibacterial properties comprises: The antibacterial glaze slurry is applied to the clean water heater inner tank, dried at a first preset temperature for a first preset time, and then transferred to a firing device and fired at a second preset temperature for a second preset time to obtain an antibacterial water heater inner tank.

7. The method for preparing the water heater inner tank with antibacterial properties according to claim 6, characterized in that: The first preset temperature ranges from 100°C to 135°C; the first preset time ranges from 30min to 60min; the second preset temperature ranges from 800°C to 1200°C; the second preset time ranges from 5min to 25min.

8. The method for preparing the water heater inner tank with antibacterial properties according to claim 1, characterized in that: After obtaining the water heater inner tank with antibacterial properties, the method further comprises: The antibacterial water heater inner tank is tested for adhesion, hot water erosion resistance, temperature sudden change resistance, acid erosion resistance and alkali erosion resistance.

9. The method for preparing the water heater inner tank with antibacterial properties according to claim 4, characterized in that: The first auxiliary agent is sodium α-glucoheptonate, and the second auxiliary agent is sodium nitrite.

10. The method for preparing the water heater inner tank with antibacterial properties according to claim 1, characterized in that: The antibacterial metal includes any one or more of silver ions, copper ions and zinc ions, and the carrier includes zirconium phosphate.

Images