CN114027708A - Antibacterial inner container and inner cover for electric cooker and preparation method thereof - Google Patents

Abstract

The invention discloses an antibacterial inner container and an inner cover for an electric cooker and a preparation method thereof. The antibacterial inner container and the preparation method thereof increase the antibacterial performance of the inner container through the arrangement of the antibacterial coating, have the antibacterial and anti-putrefaction effects, and can ensure that food can be preserved for more than 48 hours under the condition of heat preservation at 50-70 ℃.

Description

Antibacterial inner container and inner cover for electric cooker and preparation method thereof

Technical Field

The invention relates to the field of electric cookers, in particular to an antibacterial inner container and an inner cover for an electric cooker and a preparation method thereof.

Background

The electric cooker is an essential kitchen appliance product for household life, wherein the inner container is one of very important components of the electric cooker, and the heat conductivity and the taste of rice are directly influenced by the material.

The common liner materials on the market today are: an aluminum inner container, a stainless steel inner container, a ceramic inner container and a composite multi-layer material inner container.

1. An aluminum inner container. The aluminum is a metal which is easy to conduct heat, has soft hardness, is easy to cast and form, can be used for manufacturing the liner with attractive appearance, and can be compounded with other metal materials to manufacture novel materials.

However, aluminum products cannot be directly contacted with food because aluminum is a list of international carcinogens and requires protection measures such as coating the surface. When the inner wall coating is used for a long time, deformation can be caused, the uniform heat transfer of the pot bottom and the pot wall of the inner container is influenced, the inner wall coating can fall off and enter food, and the health of a human body is damaged.

2. Stainless steel inner container. The stainless steel is a good material for the inner container, the iron element is one of trace elements required by a human body, and the stainless steel can be directly used without surface treatment. Good corrosion resistance and difficult rustiness. The disadvantages are that the rice is easy to stick on the cooker, the cleaning is inconvenient, and the price is higher than that of the aluminum inner container.

The market generally selects 304 special plates for processing, and also uses 201 and 202 plates, but the price is low and the rust-proof capability is poor.

3. Ceramic (purple sand) inner container. The ceramic liner is made of safe inorganic materials, and the purple sand is one kind of ceramic and is rich in various microelements such as natural iron, zinc, calcium and the like which are helpful for human health.

The surface has good wear resistance and corrosion resistance. Can keep warm for a long time and is suitable for cooking soup. The disadvantages are poor sealing performance, long cooking time and easy blackening after a period of use.

4. A composite multilayer material liner. The composite liner is formed by compounding and processing a plurality of materials as the name implies, and integrates the advantages of a plurality of materials. The heat-conducting property is strong, the heating is uniform, the heat-conducting property is good no matter acid resistance, alkali resistance or corrosion resistance, and the cleaning is convenient.

Patent application 201610758952.9 discloses a ceramic material for an inner container of an electric cooker, which comprises a blank body and glaze, wherein the blank body is prepared from the following raw materials in parts by weight: 70-85 parts of loess, 5-20 parts of argil, 5-15 parts of talcum, 1-15 parts of tourmaline and 0-15 parts of carbon particles; the glaze is prepared from the following raw materials in parts by weight: 5-70 parts of glaze, 1-10 parts of cordierite, 10-90 parts of tourmaline and 1-3 parts of calcite. The rice cooker inner container made of the ceramic material has delicious taste, original taste and flavor and certain antibacterial and mildewproof functions.

The patent application claims to have the antibacterial and mildewproof function because the material can generate negative ions, however, the mechanism of the negative ions generated by the material is not clear, and the specific antibacterial effect is unknown. The antibacterial rice cooker inner container can provide the food storage time of the rice cooker, brings certain health guarantee for people, and is regarded by attention of people, so that the rice cooker inner container with the antibacterial function can serve people urgently.

Disclosure of Invention

In order to solve the problems, the invention aims to provide an antibacterial inner container and an inner cover for an electric cooker and a preparation method thereof.

The invention also aims to provide an antibacterial inner container and an inner cover for an electric cooker and a preparation method thereof.

The utility model provides an antibiotic inner bag and inner cup for electric rice cooker, the internal surface coating of this inner bag and inner cup has antibiotic dope layer to form the antibiotic effect of virus killing of full aspect.

The antibacterial coating layer is a photocatalyst coating layer. The invention skillfully utilizes the characteristics of the photocatalyst, generates substances with strong oxidizing property (such as hydroxyl free radicals, oxygen and the like) under the irradiation of light, and is used for decomposing organic compounds, partial inorganic compounds, bacteria, viruses and the like; meanwhile, various bacteria can be effectively killed, and toxin released by the bacteria or fungi can be decomposed and harmlessly treated.

The photocatalyst is arranged on the surfaces of the inner container and the inner cover of the electric cooker, so that the sterilization and degerming in the electric cooker can be effectively carried out, and the long-term preservation of foods such as rice and the like can be favorably realized.

Further, the photocatalyst coating layer comprises a photocatalyst and a coating layer, and the photocatalyst is arranged on the outer surface of the coating layer, so that the sterilization effect of the photocatalyst can be directly exerted, and the photocatalyst coating layer has a good antibacterial and degerming effect.

Further, any coating layer, including but not limited to inorganic and organic adhesives, capable of attaching a photocatalyst to the surface of the inner container is possible.

A preparation method of an antibacterial inner container and an inner cover for an electric cooker comprises the following steps:

s1, preparing a blank, manufacturing the blank, wherein the blank comprises an inner container and an inner cover,

the specific treatment comprises physical polishing and ultrasonic cleaning, and the cleanness and tidiness of the blank are kept.

S2, high-speed injection; high-speed spraying is carried out on the blank by high-pressure gas, wherein the high-speed spraying is mainly used for accelerating the ceramic powder to be above supersonic speed and spraying the ceramic powder on the surface of a metal plate of the blank to form a ceramic layer;

s3, preheating the blank;

the metal surface of the preheated blank has certain adsorption force, so that the functional layer can be firmly attached.

Wherein the preheating temperature is 60-80 ℃, the temperature is kept for 5-10min, if the temperature is too high, the paint can be dried completely, the paint is not sticky, and the oil flowing and wall hanging can be caused at low temperature; the temperature is controlled to be 60-80 ℃, and poor spraying can be caused when the temperature is too high or too low;

s4, spraying a primer; the primer is an adhesive, and the primer is a bonding agent,

carrying out rotary spraying by adopting an inner probe spray head so as to uniformly spray the inner surface of the inner container and the inner surface of the inner cover;

further, the inner probe spray head penetrates into the bottom of the inner container and keeps for 3-5s for a certain time so as to increase the thickness of the coating of the bottom of the inner container and the coating of the inner cover and keep the lasting antibacterial and bactericidal effect; and then slowly and selectively drawing out, spraying while drawing out, wherein the surface of the inner probe is provided with a plurality of spraying holes so as to increase the spraying area as much as possible.

After the primer sprayer is finished, the constant temperature of 45 ℃ is kept for a certain time (4min), so that the bonding agent is combined with the ceramic surface, and the adhesion effect of the photocatalyst is enhanced.

S5, spraying finish paint, namely spraying a photocatalyst layer, and spraying a photocatalyst after the adhesive is combined with the ceramic surface, wherein the spraying mode is the same as the above; after finishing the finish paint spraying, appearance inspection is carried out to avoid incomplete spraying.

The photocatalyst is bound to be sprayed on the surface of the binder and can be combined with light to generate a sterilizing and antibacterial effect on the surface environments of the inner container and the inner cover, and the photocatalyst cannot be mixed with other coatings.

The semi-finished product without problems can be checked to be subjected to next high-temperature curing.

And S6, curing at high temperature, namely putting the liner and the inner cover coated with the antibacterial coating layer into a high-temperature oven at 280 ℃, and baking for more than 10min to ensure that the antibacterial coating is completely attached to the inner surfaces of the liner and the inner cover.

And further, after the step of S6, a quality inspection step is included, after the inner container and the inner cover which are solidified at high temperature are taken out of the furnace, the inner container and the inner cover are inspected according to quality standards, and the product quality and the antibacterial coating layer are ensured to be intact.

Compared with the prior art, the invention has the advantages that:

the invention has the advantages that the antibacterial layer is arranged, the antibacterial layer is a novel functional material which enables the material to have the capability of inhibiting or killing bacteria on the surface of the material by adding a small amount of antibacterial agent, the antibacterial agent component in the antibacterial layer has the function of contacting and sterilizing or inhibiting the propagation of microorganisms on the surface of the material, and the inner container and the inner cover of the electric cooker inevitably have light penetration in the operation process of cooking and the like, so that a photocatalyst can be induced to generate antibacterial and bactericidal effects, the residual bacteria in the inner container and the inner cover are reduced, the three-dimensional antibacterial effect is realized, the chance of bacteria cross infection can be reduced, and the purposes of long-term sanitation and safety are achieved.

And the antibacterial layer is attached to the inner surfaces of the inner container and the inner cover through the ceramic surface, has good attachment effect and can be stably attached to the surfaces of the metal inner container and the inner cover.

The invention can be applied to aluminum, iron, ceramic and glass inner containers and inner covers of electric cookers, pressure cookers, hot pots, saucepans and the like. The food can be preserved for more than 48 hours under the heat preservation of 50-70 ℃ without going bad.

Drawings

Fig. 1 is a schematic view of the structure of the inner container and the inner cover realized by the invention.

Fig. 2 is a schematic structural diagram of the inner container realized by the invention.

Fig. 3 is a schematic view of the structure of the inner cap realized by the invention.

Fig. 4 is a flow chart of a method for manufacturing the inner container and the inner lid according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1, 2 and 3, the present invention comprises two parts of an inner container 6 and an inner cover 7, wherein:

referring to fig. 2, the antibacterial liner is in the shape of the existing liner, the design of the antibacterial liner is mainly characterized by the structure of the liner, and the material of the liner 6 sequentially comprises a photocatalyst 1, a bonding agent 2, a ceramic layer 3, alloy aluminum 4 and a protective outer layer 5 from inside to outside.

The inner surface of the inner container 6 is coated with an antibacterial coating layer, namely the photocatalyst 1. As is well known, a photocatalyst is characterized by generating a substance (such as a hydroxyl radical, oxygen, etc.) having a strong oxidizing property under light irradiation, and decomposing organic compounds, partially inorganic compounds, bacteria, viruses, etc.; the invention relates to a method for preparing an inner container of an electric cooker, which is characterized in that the inner container is prepared by utilizing the characteristic of a photocatalyst, so that the inner container is attached to the inner surface of the inner container of the electric cooker, and can naturally and effectively kill various bacteria in the processes of rice washing, rice washing and the like, decompose and harmlessly treat toxins released by bacteria or fungi, effectively sterilize and degerming in the electric cooker, and be beneficial to keeping long-term preservation of foods such as rice.

Generally, the photocatalyst coating layer comprises a photocatalyst 1 and a coating layer 2, and the photocatalyst 2 is arranged on the outer surface of the coating 2, so that the sterilization function of the photocatalyst 1 can be directly exerted, and the photocatalyst coating layer has a good antibacterial and sterilization effect.

The coating layer, including but not limited to inorganic and organic adhesives, may be any coating layer capable of attaching the photocatalyst to the surface of the inner container.

Under certain conditions, the adhesive 2 and the ceramic layer 3 may be combined into one layer as long as the photocatalyst 1 can be attached.

As shown in fig. 3, the inner lid 7 designed by the present invention also focuses on its structure, and the manufacturing material of the inner lid 7 is composed of an aluminum alloy 71, a first aqueous nano-ceramic substrate 72, a second aqueous nano-ceramic substrate 73 and an antibacterial layer 74 in sequence from bottom to top; wherein, the antibacterial layer 74 is a photocatalyst layer, and the antibacterial performance of the electric cooker is improved by adding the antibacterial layer 74 on the inner cover 5 of the electric cooker.

A convex layer 75 is arranged at the center of the inner cover 7, and the whole convex layer 75 is in a step shape; by providing the bulge layer 75 at the center of the inner lid 7, the water vapor inside can be concentrated at the bulge layer 75.

The top of the convex layer 75 is provided with five through holes 76, the five through holes 76 are distributed in the middle and four through holes at the periphery, and the through hole 76 at the middle is 0.5-1 times larger than the four through holes 76 at the periphery; through setting up through-hole 76 can be with concentrating the vapor discharge of protruding layer 75 department in the pot, prevent ponding from middle out and drop to reach antibiotic effect.

Generally, the aluminum alloy 71 is the base of the inner lid 7, and the aluminum alloy 71 is located at the bottommost layer of the inner lid 7; the inner lid 7 is well supported by the provision of the aluminium alloy 71. The aluminum alloy 71 is easy to process and form, has smooth surface, good mechanical property, is not easy to corrode, has uniform heat conduction of aluminum, is easy to form and is more beautiful.

The first water-based nano ceramic bottom 72 is uniformly distributed on the surface of the aluminum alloy 1, and the second water-based nano ceramic bottom 73 is uniformly covered on the surface of the first water-based nano ceramic bottom 72; by arranging the water-based nano ceramic base, the water-based nano ceramic base contains nano particles, has good nano particle dispersion performance and better hydrophilicity, so that water corrosion of the aluminum alloy 71 during cleaning of the inner cover 7 can be prevented, and the service life of the inner cover 7 can be prolonged. Meanwhile, the water-based nano ceramic substrate can well adhere the antibacterial layer 74.

The antibacterial layer 4 is uniformly distributed on the surface of the second water-based nano ceramic bottom 73, and the antibacterial layer 74 is the outermost layer on the top of the inner cover 7; the antibacterial layer 74 is a novel functional material which enables the material to have the capability of inhibiting or killing bacteria on the surface of the material by adding a small amount of antibacterial agent, and the antibacterial agent in the antibacterial layer 74 has the function of contacting and sterilizing or inhibiting the propagation of microorganisms on the surface of the material, so that the residual bacteria in the inner cover 7 can be reduced, the chance of bacteria cross infection is reduced, and the purposes of long-term sanitation and safety are achieved.

In the inner lid, the aqueous nanoceramic substrate is used as a carrier of the antibacterial layer 74, and the antibacterial layer 74 is attached to the surface of the aqueous nanoceramic substrate.

Referring to fig. 4, the method for manufacturing the inner container and the inner lid of the electric cooker of the present invention comprises the following steps:

s1, preparing a blank, manufacturing the blank, wherein the blank comprises an inner container and an inner cover,

the specific treatment comprises S11, physical sanding and grinding of the blank, S12 and ultrasonic cleaning so as to keep the blank clean and tidy. Then the next step of high-speed high-pressure air jet injection is carried out.

Generally, the liner and the inner lid need to be separately disposed of.

S2, jetting high-speed and high-pressure airflow; high-speed spraying is carried out on a blank by high-pressure gas, wherein the high-speed spraying is mainly used for accelerating ceramic powder to be more than supersonic speed and spraying the ceramic powder on the surface of a plate, so that a water-based nano ceramic layer is formed;

s3, preheating the blank; after the ceramic layer is sprayed on the surface of the metal blank, the step of coating the photocatalyst layer can be carried out, and the blank sprayed with the ceramic layer is preheated at first.

The metal surface of the preheated blank has certain adsorption force, so that the functional layer can be firmly attached. Moreover, the functional layer can penetrate into the metal material during the cooling of the metal, so that the functional layer is more firmly attached.

Wherein the preheating temperature is 60-80 ℃, the temperature is kept for 5-10min, if the temperature is too high, the paint can be dried completely, the paint is not sticky, and the oil flowing and wall hanging can be caused at low temperature. The temperature is controlled to be 60-80 ℃, and poor spraying can be caused when the temperature is too high or too low.

S4, spraying a primer; the primer is typically a water-based nano-coating that acts as a binder to facilitate adhesion to the substrate, i.e., the ceramic layer.

In general, an inner probe spray head is adopted for rotary spraying so as to uniformly spray the inner surface of the liner and the inner cover, in particular to the inner surface of the liner;

specifically, the inner probe spray head extends into the bottom of the liner or the inner cover and is kept for 3-5s for a certain time so as to increase the coating thickness of the bottom of the liner and the inner cover, and the inner probe spray head has a better wear-resistant effect; and then slowly and selectively drawing out, and spraying while drawing out.

The inner cover is a relatively flat structure, so that the spray head evolves to be used for conventional spraying.

The surface of the inner probe is provided with a plurality of spraying holes so as to increase spraying finish paint as much as possible and improve spraying efficiency.

And then spraying a finish paint, wherein the primer is a paint formed by an adhesive, the finish paint is a photocatalyst, the primer is sprayed firstly, and then the finish paint is sprayed, wherein after the primer spray head is finished, the constant temperature is kept at 45 ℃ for a certain time (4min), so that the adhesive is combined with the ceramic surface, and the adhesion effect of the photocatalyst is enhanced.

S5, spraying finish paint, namely spraying a photocatalyst layer, and spraying a photocatalyst after the adhesive is combined with the ceramic surface, wherein the spraying mode is the same as the above; after finishing finish paint spraying, the appearance of the inner container and the inner cover is checked to avoid incomplete spraying.

The photocatalyst is bound to be sprayed on the surface of the binder and can be combined with light to generate a sterilizing and antibacterial effect on the surface environments of the inner container and the inner cover, and the photocatalyst cannot be mixed with other coatings.

The semi-finished product without problems can be checked to be subjected to next high-temperature curing.

And S6, high-temperature curing, namely putting the liner and the inner cover coated with the antibacterial coating layer into a high-temperature oven at 280 ℃, and baking for more than 10min to ensure that the antibacterial coating is completely attached to the inner surface of the liner and the inner side surface of the inner cover.

Before high-temperature curing, preheating is carried out to ensure that the primer and the finish paint form good adhesion, the temperature is generally preheated to 150 ℃, and the temperature is kept for 10-30min, so that adverse effects caused by too fast heating are avoided. And after preheating, the mixture enters a high-temperature oven to be baked.

And S7, quality inspection, namely, after the liner and the inner cover which are cured at high temperature are taken out of the furnace, inspecting according to quality standards to ensure that the product quality and the antibacterial coating layer are intact.

And S8, packaging the finished product.

In a word, the invention sets up the antibacterial layer in inner container and inner cup, have photocatalysts in the antibacterial layer, photocatalyst combines with light to produce the antibacterial bactericidal action, inner container and inner cup of the electric cooker in the operation course such as cooking, etc., must have light to penetrate, can induce the photocatalyst to produce the antibacterial bactericidal action from this, reduce the inner residual bacterium of inner container and inner cup, reduce the chance that the bacterium cross infects, thus achieve the long-term hygiene, safe purpose.

In the same way, the inner container and the inner cover have the antibacterial and bactericidal effects from the upper and lower aspects, so that the equipment such as the electric cooker has the three-dimensional bactericidal effect.

And the antibacterial layer is attached to the inner surface of the inner container and the inner cover through the ceramic surface, so that the antibacterial layer is good in attachment effect and can be stably attached to the surface of the metal inner container. The food can be preserved for more than 48 hours under the heat preservation of 50-70 ℃ without going bad.

The preparation process can ensure that the photocatalyst is firmly connected with the ceramic layer, and the ceramic layer is firmly connected with the metal liner structure, so that the preparation process is firm and reliable in combination and can be used for a long time.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. An antibacterial inner container and an inner cover for an electric cooker are characterized in that the inner surfaces of the inner container and the inner cover are coated with an antibacterial coating layer.

2. The antibacterial inner container and the inner cover for the electric cooker as claimed in claim 1, wherein the antibacterial coating layer is a photocatalyst coating layer.

3. A preparation method of an antibacterial inner container and an inner cover for an electric cooker comprises the following steps:

s1, preparing a blank, manufacturing the blank, wherein the blank comprises an inner container and an inner cover,

the method specifically comprises the steps of physical polishing and ultrasonic cleaning, and the cleanness and tidiness of the blank are kept;

s2, high-speed injection; high-speed spraying is carried out on the blank by high-pressure gas, wherein the high-speed spraying is mainly used for accelerating the ceramic powder to be above supersonic speed and spraying the ceramic powder on the surface of a metal plate of the blank to form a ceramic layer;

s3, preheating the blank;

wherein the preheating temperature is 60-80 ℃, and the temperature is kept for 5-10 min;

s4, spraying a primer; the primer is an adhesive, and the primer is a bonding agent,

carrying out rotary spraying by adopting an inner probe spray head;

s5, spraying finish paint, spraying a photocatalyst layer, and spraying photocatalyst after the adhesive is combined with the ceramic surface, wherein the spraying mode is the same as the above;

and S6, curing at high temperature, namely putting the liner coated with the antibacterial coating into a high-temperature oven at 280 ℃, and baking for more than 10min to ensure that the antibacterial coating is completely attached to the inner surface of the liner.

4. The method for preparing an antibacterial inner container and an inner cover for an electric cooker as claimed in claim 3, wherein in the step S4, the inner probe nozzle extends into the bottom of the inner container for 3-5S for increasing the thickness of the coating at the bottom of the inner container and maintaining the lasting antibacterial and bactericidal effect; and then slowly and selectively drawing out, spraying while drawing out, wherein the surface of the inner probe is provided with a plurality of spraying holes so as to increase the spraying area as much as possible.

5. The method for preparing an antibacterial inner container and an inner cover for an electric cooker as claimed in claim 4, wherein in the step S4, after the primer spray head is finished, the temperature is kept constant at 45 ℃ for a certain time, so that the adhesive is bonded with the ceramic surface.

6. The method for preparing an antibacterial inner container and an inner cover for an electric cooker as claimed in claim 4, wherein in the step S5, after finishing the finish paint spraying, the appearance inspection is carried out; the photocatalyst must be sprayed on the surface of the binder.

7. The method for preparing the antibacterial inner container and the inner cover for the electric cooker as claimed in claim 4, wherein after the step of S5, the method further comprises a quality inspection step, after the antibacterial inner container and the inner cover which are cured at high temperature are taken out of the cooker, the inspection is carried out according to quality standards, and the product quality and the antibacterial coating layer are ensured to be intact.

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