Sterilizing refrigerator and sterilizing method thereof

Abstract

The invention discloses a sterilizing refrigerator. The sterilizing refrigerator comprises a refrigerating chamber, wherein an ozone sterilizing device is arranged in the refrigerating chamber; the ozone disinfection device comprises an ozone generating device and a catalyst module, the catalyst module is used for being matched with the ozone generating device to generate hydroxyl free radicals and oxygen free radicals, and the ozone disinfection device has the advantages that the ozone disinfection device can generate ozone, and the generated ozone can react with the catalyst module; and hydroxyl radicals and oxygen radicals are generated, and the hydroxyl radicals and the oxygen radicals can destroy nucleic acid and protein structures in bacterial cells so as to achieve the purpose of killing bacteria, so that the concentration of ozone in the refrigerator is reduced, and the hydroxyl radicals and the oxygen radicals with stronger sterilization effects are obtained. The technical effects that the sterilization efficiency in the refrigerator is improved, and the safety of the sterilization process is guaranteed are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a sterilizing refrigerator and a sterilizing method thereof. Background Art

[0002] As people's living standards improve, refrigerators are playing an increasingly important role as a transit station for food from the fields to the dining table. However, as a sealed space, refrigerators are prone to produce unpleasant odors. The sources of the odor are, on the one hand, the odor of the food itself; on the other hand, the odor produced when food is spoiled, such as trimethylamine produced by the decomposition of protein-containing substances such as fish and meat, and hydrogen sulfide produced by rotten eggs.

[0003] At present, refrigerator merchants at home and abroad have launched a variety of odor-free and sterilization refrigerators. The technologies used include: physical adsorption, photocatalyst, ozone method, positive and negative ion method, ultraviolet method, etc. Among them, the ozone method kills bacteria, viruses and spores by forming ozone in the refrigerator. Ozone can be decomposed into oxygen in about half an hour at room temperature, so there is no residue and secondary pollution. However, if the ozone concentration is not properly controlled, it will cause damage to the inner wall of the refrigerator and personal health. Therefore, this disinfection method has certain safety hazards, and the disinfection effect needs to be further improved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art.

[0005] Provided are a sterilizing refrigerator capable of efficient sterilization and a sterilizing method thereof.

[0006] To achieve the above object, the present invention provides the following technical solution: a sterilizing refrigerator, comprising a refrigerating chamber: an ozone sterilizing device is arranged inside the refrigerating chamber;

[0007] The ozone disinfection device comprises an ozone generator and a catalyst module, wherein the catalyst module is used to cooperate with the ozone generator to generate hydroxyl free radicals and oxygen free radicals.

[0008] The above-mentioned technical scheme is adopted, in which the ozone disinfection device can generate ozone, and the generated ozone can react with the catalyst module to generate hydroxyl free radicals and oxygen free radicals, wherein the hydroxyl free radicals and oxygen free radicals can destroy the nucleic acid and protein structure in the bacterial cells, thereby achieving the purpose of eliminating bacteria. In this way, the ozone concentration in the refrigerator is reduced, and hydroxyl free radicals and oxygen free radicals with stronger sterilization effect are obtained, thereby achieving the technical effect of improving the sterilization efficiency in the refrigerator and ensuring the safety of the disinfection process.

[0009] The above-mentioned sterilizing refrigerator may be further configured as follows: an air cooling system is fixedly arranged inside the refrigerating chamber, and the ozone disinfection device is arranged on the air inlet of the air cooling system.

[0010] The above technical scheme is mainly used in air-cooled refrigerators. The above ozone disinfection device is placed at the air inlet of the air cooling system, and air can be transported to the ozone disinfection device through the negative pressure of the air inlet of the air cooling system. The ozone generator can ionize oxygen in the air and form ozone. The hydroxyl free radicals and oxygen free radicals formed by the reaction of ozone and the catalyst module can be transported to the interior of the refrigerator through the air cooling system, and follow the airflow to sterilize the refrigerator. Through this scheme, the preparation cost of the refrigerator is reduced, and the assembly operation of the device is more convenient.

[0011] The above-mentioned sterilizing refrigerator may be further configured as follows: the ozone generating device is electrically connected to a high-voltage package, and the high-voltage package is used to transmit high-voltage current to the ozone generating device and enable the ozone generating device to generate ozone.

[0012] The above-mentioned sterilizing refrigerator may be further configured as follows: the catalyst module is composed of transition metal oxides.

[0013] The above-mentioned sterilizing refrigerator may be further configured as follows: the ozone disinfection device comprises a fixing frame, a plurality of fixing grooves are arranged inside the fixing frame, and the catalyst module is fixedly arranged inside the fixing grooves.

[0014] The above-mentioned sterilizing refrigerator may be further configured as follows: brackets are connected to both ends of the ozone generating device, and the bottom of the bracket is fixedly arranged on the surface of the fixing frame.

[0015] The above-mentioned sterilizing refrigerator may be further configured as follows: a fan is provided on the side of the ozone generating device, and the fan is used to transport air to the ozone generating device.

[0016] The above technical solution is mainly suitable for direct cooling refrigerators. Since there is no air outlet inside the refrigerator compartment of a direct cooling refrigerator, the air flowability inside the refrigerator compartment is poorer than that of an air-cooled refrigerator. A fan is arranged on the side of the ozone generator to transport oxygen for ionization to the ozone generator to ensure the ozone production efficiency of the device.

[0017] The present invention also provides a method for sterilizing a refrigerator, comprising the following steps:

[0018] Step A: Powering the ozone generator to generate ozone;

[0019] Step B: the generated ozone reacts with the catalyst module to generate hydroxyl radicals and oxygen radicals;

[0020] Step C: Hydroxyl free radicals and oxygen free radicals are introduced into the cold storage room and disinfected.

[0021] In the above scheme, hydroxyl free radicals and oxygen free radicals play the main bactericidal role. Compared with ozone in traditional technology, the above two substances have higher bactericidal effects and better safety, avoiding the damage to refrigerators and human bodies caused by improper control of ozone concentration in traditional technology.

[0022] The specific steps of step B are:

[0023] Step B1: Ozone is adsorbed on the active sites on the surface of the catalyst module and generates oxygen free radicals and oxygen. The specific reaction formula is:

[0024] O3+*=O*+O2

[0025] O3+O * =*+2O2

[0026] In the formula, O3: ozone; *: electron; O * : oxygen free radical; O2: oxygen;

[0027] Step B2: Ozone forms hydroxyl radicals on the surface of the catalyst module, and the specific reaction formula is:

[0028] H2O+O * =OH *

[0029] OH * +O3=HO * +O2

[0030] Where: H2O: water; OH * : Hydroxide; HO * : Hydroxyl free radical.

[0031] The specific steps of step C are:

[0032] Step C1: Hydroxyl free radicals and oxygen free radicals destroy the protein structure on the bacterial cell wall, thereby damaging the bacterial cell wall;

[0033] Step C2: Hydroxyl radicals and oxygen radicals penetrate the bacterial cell wall and enter the bacterial cell;

[0034] Step C3: Hydroxyl free radicals and oxygen free radicals oxidize the nucleic acid and protein structures in bacterial cells, causing the bacteria to lose their genetic center, unable to divide and reproduce, and achieve the purpose of sterilization.

[0035] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0036] 1. The ozone disinfection device can generate ozone, and the generated ozone can react with the catalyst module to generate hydroxyl free radicals and oxygen free radicals, wherein the hydroxyl free radicals and oxygen free radicals can destroy the nucleic acid and protein structure in the bacterial cells, thereby achieving the purpose of eliminating bacteria. In this way, the ozone concentration in the refrigerator is reduced, and hydroxyl free radicals and oxygen free radicals with stronger sterilization effect are obtained, thereby achieving the technical effect of improving the sterilization efficiency in the refrigerator and ensuring the safety of the disinfection process.

[0037] 2. A fan is arranged on the side of the ozone generator to transport oxygen for ionization to the ozone generator to ensure the ozone production efficiency of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present invention from a main viewing angle;

[0039] Figure 2 It is a schematic diagram of the structure of an ozone disinfection device from a top view according to an embodiment of the present invention;

[0040] Figure 3 is a schematic diagram of fan assembly according to an embodiment of the present invention;

[0041] Figure 4 is an ozone concentration graph of one embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of Escherichia coli surface sterilization test data according to an embodiment of the present invention;

[0043] Figure 6 It is a schematic diagram of Staphylococcus aureus aerosol sterilization test data according to an embodiment of the present invention.

[0044] Figure numerals: 1-main body; 2-refrigerating chamber; 3-air cooling system; 4-ozone disinfection device; 5-high pressure package; 6-catalyst module; 7-ozone generating device; 8-fan; 9-fixing frame; 10-bracket. DETAILED DESCRIPTION

[0045] See Figures 1 to 6 As shown, embodiment 1:

[0046] In this embodiment, the specific working principle and structure of an air-cooled refrigerator combined with an ozone disinfection device 4 are given. A refrigerating chamber 2 is arranged in the body 1 of the air-cooled refrigerator, and an air cooling system 3 is arranged on the inner wall of the refrigerating chamber 2. The air cooling system 3 includes an air inlet and an air outlet. The above-mentioned ozone disinfection device 4 is arranged in the air inlet. In this embodiment, the ozone disinfection device 4 is stuck on the surface of the air inlet, so that the air in the refrigerating chamber 2 first passes through the ozone disinfection device 4, and then enters the air cooling system 3 through the air inlet, which is specifically:

[0047] A refrigerator capable of efficient disinfection, comprising:

[0048] Refrigerating chamber 2: An ozone disinfection device 4 is provided inside the refrigerating chamber 2;

[0049] Ozone disinfection device 4: used for disinfecting the cold storage room 2, the ozone disinfection device 4 comprises an ozone generator 7 and a catalyst module 6, and the catalyst module 6 is used for cooperating with the ozone generator 7 to generate hydroxyl free radicals and oxygen free radicals.

[0050] An air cooling system 3 is fixedly installed inside the refrigerating chamber 2 , and an ozone disinfection device 4 is arranged on the air inlet of the air cooling system 3 .

[0051] In this scheme, the air cooling system 3 and the structure of its air inlet and outlet and the specific refrigeration principle are prior arts and will not be elaborated in this application. Negative pressure can be formed at the air inlet of the air cooling system 3, and the air in the cold storage room 2 can pass through the ozone disinfection device 4. The ozone generator 7 in the ozone disinfection device 4 can ionize the oxygen in the air and produce ozone. Ozone can produce hydroxyl radicals and oxygen free radicals during the reaction with the catalyst module 6. Through this type of reaction, the ozone concentration in the refrigerator can be effectively reduced, and the killing efficiency of hydroxyl free radicals and oxygen free radicals on bacteria is higher than that of ozone. Through this scheme, the disinfection efficiency of the refrigerator can be improved while the safety of the refrigerator can be improved. According to national safety regulations, the safe concentration of ozone is 100ppb. During operation, the device can stabilize the ozone concentration at less than 45ppb, and the ozone concentration curve is as shown in FIG. Figure 4 shown.

[0052] In the above solution, the ozone generator 7 is also electrically connected to the high-voltage package 5, wherein the high-voltage package 5 is used to transmit high-voltage current to the ozone generator 7, so that the ozone generator 7 can ionize oxygen to generate ozone.

[0053] Furthermore, the catalyst module 6 is composed of a transition metal oxide, which can react with ozone to generate oxygen free radicals and hydroxyl free radicals. During the reaction, it can continuously generate holes to provide active sites, so it has a long service life and does not need to be replaced under normal use. Specifically, the catalyst is a copper-manganese composite oxide catalyst.

[0054] The specific composition of the ozone disinfection device 4 is as follows:

[0055] The ozone disinfection device 4 includes a fixing frame 9 , and a plurality of fixing grooves are arranged inside the fixing frame 9 . The catalyst module 6 is fixedly arranged inside the fixing grooves.

[0056] Brackets 10 are connected to both ends of the ozone generator 7 , and the bottom of the bracket 10 is fixedly disposed on the surface of the fixing frame 9 .

[0057] The specific steps of the disinfection process are as follows:

[0058] A highly efficient disinfection method comprises the following steps:

[0059] Step A: Powering the ozone generator to generate ozone;

[0060] Step B: the generated ozone reacts with the catalyst module to generate hydroxyl radicals and oxygen radicals;

[0061] Step C: Hydroxyl free radicals and oxygen free radicals are introduced into the cold storage room and disinfected.

[0062] Furthermore, the above step B is a key step for generating hydroxyl radicals and oxygen radicals, which is specifically:

[0063] The specific steps of step B are:

[0064] Step B1: Ozone is adsorbed on the active sites on the surface of the catalyst module and generates oxygen free radicals and oxygen. The specific reaction formula is:

[0065] O3+*=O * +O2

[0066] O3+O * =*+2O2

[0067] In the formula, O3: ozone; *: electron; O * : oxygen free radical; O2: oxygen;

[0068] Step B2: Ozone forms hydroxyl radicals on the surface of the catalyst module, and the specific reaction formula is:

[0069] H2O+O * =OH *

[0070] OH * +O3=HO * +O2

[0071] Where: H2O: water; OH * : Hydroxide; HO * : Hydroxyl free radical.

[0072] In the above reaction, the reaction formula of step B1 is that ozone is adsorbed on the active sites of the catalyst surface to produce oxygen and oxygen free radicals, and the reaction formula of step B2 is that after water molecules are adsorbed on the upper surface of the catalyst module 6, ozone passes through the catalyst surface to form hydroxyl free radicals. Through the above scheme, hydroxyl free radicals and oxygen free radicals can be generated while effectively consuming ozone.

[0073] The specific steps of step C are:

[0074] Step C1: Hydroxyl free radicals and oxygen free radicals destroy the protein structure on the bacterial cell wall, thereby damaging the bacterial cell wall;

[0075] Step C2: Hydroxyl radicals and oxygen radicals penetrate the bacterial cell wall and enter the bacterial cell;

[0076] Step C3: Hydroxyl free radicals and oxygen free radicals oxidize the nucleic acid and protein structures in bacterial cells, causing the bacteria to lose their genetic center, unable to divide and reproduce, and achieve the purpose of sterilization.

[0077] Embodiment 2:

[0078] A fan 8 is provided on the side of the ozone generating device 7 , and the fan 8 is used to transport air to the ozone generating device 7 .

[0079] In this embodiment, it is mainly used in direct cooling refrigerators. Since there is no air cooling system 3 in the refrigerating chamber 2 of the direct cooling refrigerator, a fan 8 is provided on the side of the ozone generating device 7 so that the air in the refrigerating chamber 2 inside the direct cooling refrigerator can pass through the ozone generating device 7 and generate ozone. Through this structure, the amount of air passing through the ozone generating device 7 in the direct cooling 3-chamber refrigerator can be guaranteed to ensure its disinfection effect. The specific structure is as follows: Figure 4 As shown, for aesthetic reasons, a shell can be set outside the fan 8 and the ozone disinfection device 4, and vents can be set on the outer wall of the shell to allow air to enter the shell through the vents and allow the generated hydroxyl radicals and oxygen free radicals to be discharged into the cold storage room 2 through the vents.

[0080] Embodiment 4:

[0081] In this embodiment, the ozone concentration in a refrigerator equipped with an ozone disinfection device 4 is tested. During the experiment, the ozone concentration in the refrigerator is recorded in real time. The curve is as follows: Figure 5 As shown, it can be seen that the ozone concentration in the refrigerator is always below 45ppb. Compared with the traditional ozone disinfection mode, the ozone concentration can be greatly reduced to ensure the safety of the disinfection process.

[0082] Embodiment 5:

[0083] In this embodiment, the device was tested for the sterilization of Escherichia coli on the surface, wherein the ozone concentration was 440 ppb, the humidity was 70%, the temperature was 5%, and the experimental time was 24 hours. The test results are as follows: Figure 6 As shown, according to the experimental results, it can be concluded that the method of disinfection by using hydroxyl free radicals and oxygen free radicals in the present application can achieve efficient sterilization, and maintain a low concentration of ozone during the sterilization process to avoid ozone pollution.

[0084] Embodiment 6:

[0085] In this embodiment, the aerosol sterilization effect of the device on Staphylococcus aureus was tested, wherein the ozone concentration was 440 ppb, the humidity was 70%, the temperature was 5%, and the experimental time was 1 hour. The test results are as follows: Figure 6 As shown, the sterilization rate of aerosol for Staphylococcus aureus can reach an average of 96.63%.

Claims

1. A sterilizing refrigerator, comprising a refrigerating chamber: an ozone sterilizing device is arranged inside the refrigerating chamber; The ozone disinfection device comprises an ozone generator and a catalyst module, wherein the catalyst module is used to cooperate with the ozone generator to generate hydroxyl free radicals and oxygen free radicals.

2. A sterilizing refrigerator according to claim 1, characterized in that: An air cooling system is fixedly arranged inside the refrigerating chamber, and an ozone disinfection device is arranged on the air inlet of the air cooling system.

3. A sterilizing refrigerator according to claim 1, characterized in that: The ozone generating device is electrically connected to a high voltage package, which is used to transmit high voltage current to the ozone generating device and enable the ozone generating device to generate ozone.

4. A sterilizing refrigerator according to claim 1, characterized in that: The catalyst module is composed of transition metal oxides.

5. A sterilizing refrigerator according to claim 1, characterized in that: The ozone disinfection device comprises a fixing frame, a plurality of fixing grooves are arranged inside the fixing frame, and the catalyst module is fixed inside the fixing grooves.

6. A sterilizing refrigerator according to claim 5, characterized in that: Both ends of the ozone generating device are connected with brackets, and the bottom of the brackets is fixedly arranged on the surface of the fixing frame.

7. A sterilizing refrigerator according to claim 1, characterized in that: A fan is arranged on the side of the ozone generating device, and the fan is used to convey air to the ozone generating device.

8. A sterilization method for a sterilizing refrigerator according to claims 1 to 7, characterized in that: The following steps are involved: Step A: Powering the ozone generator to generate ozone; Step B: the generated ozone reacts with the catalyst module to generate hydroxyl radicals and oxygen radicals; Step C: Hydroxyl free radicals and oxygen free radicals are introduced into the cold storage room for disinfection.

9. The method for disinfecting according to claim 8, characterized in that: The specific steps of step B are: Step B1: Ozone is adsorbed on the active sites on the surface of the catalyst module and generates oxygen free radicals and oxygen. The specific reaction formula is: <h2 style=";text-align:left;direction:ltr">O3+*=O<h2 style=";text-align:left;direction:ltr"> * <h2 style=";text-align:left;direction:ltr"> +O2 <h2 style=";text-align:left;direction:ltr">O3+O<h2 style=";text-align:left;direction:ltr"> * <h2 style=";text-align:left;direction:ltr"> =*+2O2 Step B2: Ozone forms hydroxyl radicals on the surface of the catalyst module, and the specific reaction formula is: H2O+O * =OH * <h2 style=";text-align:left;direction:ltr">OH<h2 style=";text-align:left;direction:ltr"> * <h2 style=";text-align:left;direction:ltr"> +O3=HO<h2 style=";text-align:left;direction:ltr"> * <h2 style=";text-align:left;direction:ltr"> +O2.

10. A method for disinfecting according to claim 8, characterized in that: The specific steps of step C are: Step C1: Hydroxyl free radicals and oxygen free radicals destroy the protein structure on the bacterial cell wall, thereby damaging the bacterial cell wall; Step C2: Hydroxyl radicals and oxygen radicals penetrate the bacterial cell wall and enter the bacterial cell; Step C3: Hydroxyl free radicals and oxygen free radicals oxidize the nucleic acid and protein structures in bacterial cells, causing the bacteria to lose their genetic center.

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