Deodorizing agent, preparation method, deodorizing assembly and refrigeration equipment

Abstract

The application relates to the field of deodorization technology and discloses a deodorant, a preparation method, a deodorization assembly and a refrigeration equipment. The deodorant comprises 1-2 parts of thiourea, 0.002-0.005 parts of gram bacterium freeze-dried powder, 0.1-0.4 parts of concentrated nitric acid and 10-25 parts of water; wherein the gram bacterium freeze-dried powder comprises gram-negative bacterium freeze-dried powder and / or gram-positive bacterium freeze-dried powder. In the application, the deodorant prepared by adding the gram bacterium freeze-dried powder into the thiourea, water and concentrated nitric acid can play a deodorization role under the action of visible light, so that the deodorant used as the deodorant of the refrigeration equipment does not need to be equipped with an ultraviolet lamp, the structure is simple, and the cost is low.

Description

Technical Field

[0001] This application relates to the field of odor removal technology, such as an odor removal agent, preparation method, odor removal component, and refrigeration equipment. Background Technology

[0002] Currently, due to the storage of different foods and prolonged use, refrigeration equipment often produces strong odors inside refrigerators, caused by the odors emitted by the different foods themselves and the release of amines and sulfur-containing gases after spoilage. This seriously affects the user experience.

[0003] Existing technologies employ photocatalytic deodorizers, which, under ultraviolet light, can decompose various organic pollutants into carbon dioxide and water, and exert a strong bactericidal effect on various bacteria, viruses, and fungi.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] Photocatalytic deodorizers only work under ultraviolet light, requiring specific ultraviolet lamps. The deodorization process is complex and costly, and excessive ultraviolet light is harmful to the human body.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0007] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0008] This disclosure provides an odor remover, an odor remover component, and a refrigeration device to solve problems such as complex odor removal structures and high costs.

[0009] According to a first aspect of the present invention, a deodorizing agent is provided, comprising, by weight: 1-2 parts of thiourea, 0.002-0.005 parts of lyophilized Gram bacteria powder, 0.1-0.4 parts of concentrated nitric acid and 10-25 parts of water; wherein the lyophilized Gram bacteria powder comprises lyophilized Gram-negative bacteria powder and / or lyophilized Gram-positive bacteria powder.

[0010] Optionally, the deodorizing agent comprises, by weight: 1.5 parts thiourea, 0.004 parts lyophilized Gram bacteria powder, 0.28 parts concentrated nitric acid and 20 parts water.

[0011] Optionally, the Gram-negative lyophilized powder includes Escherichia coli lyophilized powder and / or Pseudomonas aeruginosa lyophilized powder; the Gram-positive lyophilized powder includes Staphylococcus aureus lyophilized powder and / or Bacillus subtilis lyophilized powder.

[0012] According to a second aspect of the present invention, a method for preparing a deodorizing agent is provided, characterized by comprising the following steps:

[0013] The deodorizing agent according to any one of the above embodiments is prepared by using thiourea, freeze-dried Gram bacteria powder, concentrated nitric acid and water.

[0014] Thiourea, freeze-dried Gram bacteria powder, and concentrated nitric acid were added to water in sequence and mixed well to obtain a homogeneous mixture.

[0015] The mixture was heated with microwaves to obtain a first solid.

[0016] The first solid is physically crushed to obtain a powder, and then the powder is washed with ultrapure water until the washing mixture is neutral to obtain a neutral substance.

[0017] The neutral substance is filtered to obtain a second solid; the second solid is heated and vacuum dried to obtain a dried substance.

[0018] The dried material is added to the deionized water and ultrasonically treated for 12-24 hours, then allowed to stand to obtain the first supernatant; wherein the weight ratio of the dried material to the deionized water is 1:0.8-1.5.

[0019] The first supernatant was centrifuged at a first speed of 3000-4000 rpm, and the solid was discarded to obtain the second supernatant.

[0020] The second supernatant was centrifuged at the second rotation speed, and the supernatant was discarded to obtain the third solid.

[0021] The third solid is freeze-dried under vacuum for 12-24 hours to obtain the deodorizing agent.

[0022] The second rotational speed is greater than the first rotational speed.

[0023] Optionally, the first solid is physically crushed to obtain powder, including grinding the first solid in a grinding bowl; wherein the grinding bowl is an agate grinding bowl.

[0024] According to a third aspect of the present invention, a deodorizing component is provided, comprising: a housing defining a receiving space, the housing having a vent; a deodorizing agent as described in any of the above embodiments, disposed within the receiving space; and a light source assembly disposed within the receiving space, the light emitted by the light source assembly being capable of irradiating the deodorizing agent.

[0025] Optionally, the deodorizing agent is processed into a porous block; or, the deodorizing component further includes a substrate, and the deodorizing agent is disposed in the receiving space in one or more ways, including: adhering to the surface of the substrate, placing in the substrate, and bonding to the substrate.

[0026] Optionally, the substrate includes one or more of the following: activated carbon substrate, metal mesh substrate, and ceramic substrate; wherein the activated carbon substrate is honeycomb-shaped, and the deodorizing agent is attached to the surface of the activated carbon substrate.

[0027] Optionally, the deodorization component further includes a fan circulation system disposed within the deodorization component.

[0028] According to a fourth aspect of the present invention, a refrigeration device is provided, comprising a device body and a deodorizing component as described in any of the above embodiments; wherein the device body defines a refrigeration space; and the deodorizing component as described in any of the above embodiments is disposed within the refrigeration space.

[0029] The deodorizing agent, preparation method, deodorizing component, and refrigeration equipment provided in this disclosure can achieve the following technical effects:

[0030] The deodorizer prepared by adding Gram bacteria freeze-dried powder to thiourea, water, and concentrated nitric acid can exert its deodorizing effect under visible light. Using this deodorizer as a deodorizer for refrigeration equipment does not require ultraviolet lamps. It has a simple structure and low cost.

[0031] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0032] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0033] Figure 1 This is a flowchart illustrating the preparation process of the deodorizing agent according to an embodiment of this disclosure;

[0034] Figure 2 This is a schematic diagram illustrating the deodorizing principle of the deodorizing agent according to an embodiment of this disclosure;

[0035] Figure 3 This is the UV-Vis diffuse reflectance spectrum of the deodorizing agent according to an embodiment of this disclosure;

[0036] Figure 4 The deodorizing agent of this disclosure embodiment Curve showing the change in photon energy;

[0037] Figure 5 This is a schematic diagram of the deodorizing component structure according to an embodiment of the present disclosure;

[0038] Figure 6 This is a schematic diagram of the structure of a refrigeration device according to an embodiment of this disclosure.

[0039] Figure label:

[0040] 100: Odor remover;

[0041] 200: Odor removal component; 210: Housing; 211: Receiving space; 212: Ventilation opening; 220: Light source component; 230: Substrate; 231: Activated carbon substrate; 240: Fan circulation system;

[0042] 400: Refrigeration equipment; 410: Equipment body; 411: Refrigeration space. Detailed Implementation

[0043] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0044] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0045] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0046] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0047] Unless otherwise stated, the term "multiple" means two or more.

[0048] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0050] Combination Figures 1 to 4 This disclosure provides an odor remover, prepared by weight from raw materials comprising the following components: 1-2 parts thiourea, 0.002-0.005 parts lyophilized Gram bacteria powder, 0.1-0.4 parts concentrated nitric acid, and 10-25 parts water; wherein the lyophilized Gram bacteria powder includes lyophilized Gram-negative bacteria powder and / or lyophilized Gram-positive bacteria powder.

[0051] like Figure 2 As shown in this embodiment, the deodorizing agent prepared by adding Gram-derived lyophilized powder to thiourea, water, and concentrated nitric acid has a small band gap (1.96 eV), requiring little energy for electron transitions. Electrons can transition from the valence band to the conduction band under visible light, leaving an electron-hole pair in the valence band. The electron and hole (called an electron-hole pair) migrate to the material surface, participating in the redox reaction of the adsorbate and catalyzing water or oxygen in the air into highly reactive photoactive groups, such as hydroxyl radicals (HO.) and superoxide anion radicals (O.). 2- These active groups, such as formaldehyde, benzene, xylene, ammonia, and some malodorous substances, have strong oxidizing properties and can degrade various organic compounds with unstable chemical bonds, such as formaldehyde, benzene, xylene, ammonia, and some malodorous substances, into water and carbon dioxide. No harmful substances or substances with other odors are produced during the entire deodorization process, making it safe and environmentally friendly. Using this deodorizer as a 400 deodorizer for refrigeration equipment eliminates the need for ultraviolet lamps. It has a simple structure, low cost, and overcomes the limitation of traditional photocatalyst materials, such as TiO2, which can only deodorize under ultraviolet light.

[0052] In this embodiment, the Gram-derived freeze-dried powder comprises freeze-dried powder of cocci or bacilli in a three-dimensional morphology of spherical or rod-shaped organisms. Thiourea, a raw material, coats the surface of the cocci and / or bacilli. During the synthesis process, as the temperature rises, the three-dimensional morphology of the cocci and / or bacilli collapses, making the synthesized material porous and increasing its specific surface area. Furthermore, Gram-derived bacteria contain abundant S and O elements. The doping of these electron-rich elements gives the synthesized deodorizing agent a rich electronic structure; therefore, the deodorizing agent exhibits higher catalytic activity, enabling it to perform its deodorizing function under visible light.

[0053] Combination Figure 2 , Figure 3 As shown, in this embodiment, Gram-dried bacteria powder was added to thiourea, water, and concentrated nitric acid to prepare a deodorizing agent in a certain proportion; the addition of Gram-dried bacteria powder reduced the band gap of the deodorizing agent.

[0054] Optionally, the lyophilized powder of Gram-negative bacteria includes lyophilized powder of Escherichia coli and / or lyophilized powder of Pseudomonas aeruginosa; the lyophilized powder of Gram-positive bacteria includes lyophilized powder of Staphylococcus aureus and / or lyophilized powder of Bacillus subtilis.

[0055] This embodiment discloses that the strains of Gram-negative or Gram-positive bacteria that can be used in the reaction process of the above embodiments can be one or more of Staphylococcus aureus lyophilized powder, Bacillus subtilis lyophilized powder, Escherichia coli lyophilized powder, and Pseudomonas aeruginosa lyophilized powder.

[0056] Optionally, the Gram-bearing lyophilized powder includes at least Staphylococcus aureus lyophilized powder.

[0057] In this embodiment, the Gram bacteria is freeze-dried Staphylococcus aureus powder. Firstly, Staphylococcus aureus is spherical in shape, and the raw material thiourea coats the surface of Staphylococcus aureus. During the synthesis process, as the temperature rises, the spherical shape of Staphylococcus aureus collapses, making the synthesized material porous and increasing its specific surface area. Secondly, Staphylococcus aureus contains abundant S and O elements. The doping of these electron-rich elements gives the synthesized deodorizer a rich electronic structure. Therefore, the deodorizer has higher catalytic activity, enabling it to exert its deodorizing performance under visible light.

[0058] Optionally, in this embodiment, the weight parts of thiourea include: 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, or 3 parts by weight; the weight parts of Gram bacteria freeze-dried powder include: 0.004 parts by weight, 0.006 parts by weight, 0.008 parts by weight, or 0.01 parts by weight; the concentrated nitric acid is commercially available concentrated nitric acid, and the weight parts of concentrated nitric acid include: 0.28 parts by weight, 0.4 parts by weight, or 0.5 parts by weight; the weight parts of water include: 15 parts by weight, 18 parts by weight, or 20 parts by weight.

[0059] In one embodiment, the deodorizing agent comprises, by weight: 1.5 parts thiourea, 0.004 parts lyophilized Gram bacteria powder, 0.28 parts concentrated nitric acid, and 20 parts water.

[0060] The deodorizing agent of this embodiment is a powdered deodorizing agent obtained by heating a mixture of thiourea, freeze-dried Gram bacteria powder, concentrated nitric acid and water to obtain a first solid, and then physically processing the first solid.

[0061] Optionally, after crushing the first solid, the powder obtained is washed until neutral, then ultrasonically treated, allowed to stand, and the supernatant is taken. The supernatant is then centrifuged at 3000-4000 rpm to remove some of the solids. The supernatant obtained from the first centrifugation is then centrifuged again to remove the solids and vacuum dried to obtain the deodorizing agent.

[0062] Optionally, the deodorizing agent is prepared according to the following proportions by weight: 1.5 parts of thiourea are dissolved in water to obtain a thiourea solution; Gram-dried Gram bacteria powder is added to the thiourea solution to obtain a first solution of thiourea and Gram bacteria; concentrated nitric acid is added to the first solution and mixed thoroughly, and then microwave heating is carried out for 3 minutes at 100W to obtain a yellowish-brown solid; the yellowish-brown solid is the initial deodorizing agent; the concentrated nitric acid plays a catalytic role in the reaction.

[0063] In this embodiment of the disclosure, the concentrated nitric acid is a nitric acid solution with a mass concentration of 65% or higher. Optionally, the concentrated nitric acid is a nitric acid solution with a mass concentration of 65% to 68%.

[0064] Optionally, the lyophilized powder of Gram-negative bacteria includes lyophilized powder of Escherichia coli and / or lyophilized powder of Pseudomonas aeruginosa; the lyophilized powder of Gram-positive bacteria includes lyophilized powder of Staphylococcus aureus and / or lyophilized powder of Bacillus subtilis.

[0065] In the deodorizing agent of this disclosure, all components are commercially available products. The Gram-containing freeze-dried powder can also be prepared in-house, and the method of preparation is not limited. For example, the method for preparing Staphylococcus aureus freeze-dried powder described later.

[0066] According to an embodiment of a second aspect of the present invention, a method for preparing a deodorizing agent is provided, comprising the following steps:

[0067] S11. Prepare thiourea, Gram-dried bacterial powder, concentrated nitric acid and water as the deodorizing agent according to any of the above embodiments.

[0068] In step S11, thiourea, Gram-dried bacteria powder, concentrated nitric acid, and water are all commercially available products. Of course, Gram-dried bacteria powder can also be made at home; there are no restrictions.

[0069] S12. Add thiourea, freeze-dried Gram bacteria powder, and concentrated nitric acid to water in sequence, mix well, and obtain a homogeneous mixture.

[0070] This step S12 specifically includes the following steps:

[0071] S121. Thiourea is dissolved in water to obtain a thiourea solution.

[0072] S122. Add Staphylococcus aureus lyophilized powder to thiourea solution to obtain the first solution.

[0073] S123. Concentrated nitric acid is added to the first solution and mixed to obtain a homogeneous mixture. Concentrated nitric acid acts as a catalyst.

[0074] S13. The mixture is heated by microwave to obtain the first solid.

[0075] S14. The first solid is physically crushed to obtain a powder, and then the powder is washed with ultrapure water until the washing mixture is neutral to obtain a neutral substance.

[0076] S15. The neutral substance is filtered to obtain a second solid substance; the second solid substance is heated and dried under vacuum to obtain a dried substance.

[0077] S16. Add the dried material to deionized water, sonicate for 12-24 hours, and then let it stand to obtain the first supernatant; wherein the weight ratio of the dried material to the deionized water is 1:0.8-1.5.

[0078] S17. Centrifuge the first supernatant at a first speed of 3000-4000 rpm, discard the solid to obtain the second supernatant.

[0079] S18. Centrifuge the second supernatant at the second rotation speed, discard the supernatant to obtain the third solid.

[0080] S19. Vacuum freeze-dry the third solid for 12-24 hours to obtain the deodorizer.

[0081] The second rotational speed is greater than the first rotational speed.

[0082] In the method for preparing the deodorizing agent according to the embodiments of this disclosure,

[0083] Optionally, in step S13, microwave heating includes heating the reaction at 80-120W for 2-5 minutes.

[0084] Optionally, in step S13, microwave heating includes heating the reaction at 100W for 3 minutes.

[0085] The first solid obtained in step S13 is yellowish-brown and in lumps. Therefore, in step S14, it undergoes appropriate physical processing to obtain a powder. The physical processing method in step S14 is not limited, as long as it can process the lumpy first solid into powder. Furthermore, the particle size of the powder is not limited and is determined according to actual needs.

[0086] Optionally, in step S14, the physical crushing process includes grinding. Specifically, the first solid is placed in a grinding bowl and ground into powder; wherein, the grinding bowl is an agate grinding bowl. In this embodiment, the first solid is ground in an agate grinding bowl. Since the agate grinding bowl is free of impurities, has high pressure resistance, and is resistant to acids and alkalis, no mortar material will be mixed into the ground material after grinding, ensuring that the composition of the first solid is not affected; grinding the first solid to a fine consistency reduces the volume of solid particles, thereby increasing the deodorizing effect of the deodorizing agent.

[0087] In step S14, the ultrapure water has a low impurity content and does not contain strong dielectrics. Using ultrapure water to wash the powder can maximize the protection of the material performance.

[0088] Optionally, in step S14, the powder is washed with ultrapure water until the washing mixture is neutral to obtain a neutral substance. Alternatively, the powder is washed with water until the washing mixture is neutral to obtain a first neutral substance, and then the first neutral substance is washed with anhydrous ethanol to remove organic byproducts to obtain a neutral substance.

[0089] Optionally, in step S15, the heating temperature for vacuum heating drying is 50℃-70℃. Optionally, the heating temperature is 60℃.

[0090] In step S15, the heating time for vacuum drying is not limited and can be determined based on the desired dried product. Optionally, the heating time is 6-8 hours. Optionally, the heating time is 6 hours.

[0091] Optionally, in step S16, the deionized water has a low impurity content and does not contain strong dielectrics. Soaking the dried material in deionized water for ultrasonic treatment can maximize the protection of material performance. The dried material is placed in deionized water and then ultrasonically peeled in an ultrasonic cleaner for 12-24 hours. Optionally, the ultrasonic peeling time is 24 hours. Then, it is allowed to stand, and large particles are precipitated to obtain the first supernatant; optionally, the standing time is 1 hour.

[0092] In step S16, ultrasonic peeling breaks down large-sized blocky nanomaterials in the dried material into smaller sheet-like nanomaterials to increase the specific surface area of ​​the nanomaterials. This helps the deodorizer come into contact with more odors during use, thereby improving the deodorizing effect.

[0093] Optionally, in step S17, the first rotational speed is 3000 rpm.

[0094] Optionally, in step S17, the centrifugation time is 5 minutes.

[0095] Optionally, in step S18, the second rotational speed is 9000 to 12000 rpm.

[0096] Optionally, in step S18, the second rotational speed is 10000 rpm.

[0097] Optionally, in step S18, the centrifugation time is 2 to 5 minutes.

[0098] Optionally, in step S18, the centrifugation time is 5 minutes.

[0099] In steps S17-S18, centrifugation is performed at different speeds and different centrifugal forces to filter out useless components in sequence, resulting in a deodorizing agent with higher purity. Specifically, centrifugation at the first speed discards large solids and obtains small solids. Centrifugation at the second speed precipitates the small solids in the supernatant obtained from centrifugation at the first speed, resulting in a third solid of small solid nanomaterials.

[0100] In step S19, the third solid vacuum freeze-drying process is not limited, and can be determined based on the amount of dried product obtained. Optionally, the vacuum freeze-drying time is 12–14 hours. Optionally, the vacuum freeze-drying time is 12 hours.

[0101] Optionally, in step S11, the Gram-derived bacterial lyophilized powder includes at least Staphylococcus aureus lyophilized powder, wherein the preparation method of the Staphylococcus aureus lyophilized powder includes the following steps:

[0102] S21. Take the Staphylococcus aureus mother liquor into broth medium to obtain the first bacterial culture.

[0103] S22. Shake the first bacterial solution at 37-38℃ to obtain a well-mixed bacterial solution.

[0104] S23. Centrifuge the shaken bacterial solution at the third rotation speed for 2-5 minutes, discard the culture medium, and obtain the second bacterial solution.

[0105] S24. The second bacterial solution is repeatedly washed with ultrapure water until no culture medium residue is left to obtain the fourth solid.

[0106] S25. The fourth solid is freeze-dried under vacuum for 12-24 hours to obtain Staphylococcus aureus freeze-dried powder.

[0107] Optionally, in step S21, the concentration of the Staphylococcus aureus mother liquor is 10. 9 CFU / mL.

[0108] Optionally, in step S21, 0.1-0.2 parts by weight of Staphylococcus aureus mother liquor are taken into 20-30 parts of broth culture medium to obtain the first bacterial solution.

[0109] Optionally, in step S21, 0.1 parts by weight of Staphylococcus aureus mother liquor is taken into 25 parts of broth culture medium to obtain the first bacterial solution.

[0110] Optionally, in step S22, the first bacterial solution is shaken at 37°C for 6-8 hours.

[0111] Optionally, in step S23, the third rotational speed is 4000-6000 rpm.

[0112] Optionally, in step S23, the third rotation speed is 6000 rpm and the centrifugation time is 5 min.

[0113] In step S24, repeatedly washing the second bacterial solution with ultrapure water can maximize the purity of the second bacterial solution and reduce the number of impurities entering the second bacterial solution.

[0114] Optionally, in step S25, the fourth solid is vacuum freeze-dried for 12 hours.

[0115] The following specific embodiments further illustrate the deodorizing agent and its preparation method according to the present disclosure.

[0116] Example 1: Preparation method of Staphylococcus aureus freeze-dried powder

[0117] A method for preparing Staphylococcus aureus freeze-dried powder includes the following steps:

[0118] Take 0.1 to 0.2 parts by weight to achieve a concentration of 10. 9 A CFU / mL stock solution of Staphylococcus aureus was placed in a broth culture medium. The broth culture medium was prepared by weighing 1 part by weight of peptone, 0.3 parts by weight of beef extract, 0.5 parts by weight of sodium chloride, and 100 parts by weight of ultrapure water, stirring until dissolved to obtain the first culture medium, and then autoclaving the first culture medium to obtain the broth culture medium; a concentration of 10 9A CFU / mL stock solution of Staphylococcus aureus was cultured in broth medium at 37°C with shaking for 6-8 hours to allow the Staphylococcus aureus to multiply and expand, resulting in a well-mixed bacterial solution. The well-mixed bacterial solution was then centrifuged at a third rotation speed of 6000 rpm for 2-5 minutes, discarding the culture medium to obtain a second bacterial solution. Centrifugation at 6000 rpm for 2-5 minutes, preferably 5 minutes, allows for better removal of the culture medium and reduces impurities in the second bacterial solution. The second bacterial solution was washed with ultrapure water to obtain a solution as free of impurities as possible. Solid-liquid separation was performed, including filtration, to obtain a fourth solid. The fourth solid was then dried in a vacuum freeze dryer for 12 hours to obtain lyophilized Staphylococcus aureus powder.

[0119] In this embodiment, the concentration of the Staphylococcus aureus mother liquor is 10. 9 CFU / mL.

[0120] In this embodiment, the preparation of a specific concentration of Staphylococcus aureus includes the following steps: selecting 0.1 parts by weight of Staphylococcus aureus mother liquor with a concentration of 10... 9 The broth, containing CFU / mL, is placed in a broth culture medium prepared to a specific ratio. Temperature and shaking are set for a set time to cultivate a specific number of Staphylococcus aureus bacteria. Different numbers of Staphylococcus aureus bacteria result in different deodorizing agent properties. The broth culture medium is prepared by weighing 1 part peptone, 0.3 parts beef extract, and 0.5 parts sodium chloride into a beaker, adding 100 parts ultrapure water, and stirring until dissolved. The required volume of broth culture medium is prepared according to this ratio and sterilized in an autoclave. 0.1 parts by weight of Staphylococcus aureus stock solution is placed in 25 parts by weight of broth culture medium and cultured at 37°C with shaking for 6-8 hours. The resulting Staphylococcus aureus bacterial count is the desired bacterial count.

[0121] Example 2 Deodorizer

[0122] An odor-removing agent is prepared from raw materials comprising the following components: 1.5 parts thiourea, 0.004 parts lyophilized Gram bacteria powder, 0.28 parts concentrated nitric acid, and 20 parts water. The lyophilized Gram bacteria powder is Staphylococcus aureus prepared in Example 1.

[0123] Specifically, 0.761 g (10 mmol) of thiourea was dissolved in 10 mL of water to obtain a thiourea solution; 2 mg of Staphylococcus aureus was added to the thiourea solution to obtain a first solution of thiourea and Staphylococcus aureus; 0.1 mL of concentrated nitric acid (65 wt.%) was added to the first solution and mixed thoroughly, then placed in a microwave oven and reacted at 100 W for 3 minutes to obtain a yellowish-brown solid; the concentrated nitric acid acted as a catalyst in the reaction.

[0124] Example 3: Preparation method of deodorizing agent

[0125] A method for preparing an odor-removing agent includes the following steps:

[0126] S31. Prepare thiourea, Gram-dried bacterial powder, concentrated nitric acid and water according to the deodorizing agent of Example 2.

[0127] S32. Add 0.761g (10 mmol) of thiourea, 2mg of Staphylococcus aureus, and 0.1mL of concentrated nitric acid to 10mL of water, and mix thoroughly to obtain the first homogenate. The concentrated nitric acid acts as a catalyst.

[0128] This step S32 specifically includes the following steps:

[0129] S321, 0.761 g (10 mmol) of thiourea was dissolved in 10 mL of water to obtain a thiourea solution.

[0130] S322. Add 2 mg of Staphylococcus aureus lyophilized powder to the thiourea solution to obtain the first solution.

[0131] S123. Add 0.1 mL of concentrated nitric acid to the first solution, mix, and obtain a homogeneous mixture.

[0132] S33. Place the mixture in a microwave oven and heat it at 100W for 3 minutes to obtain a first solid substance that is yellowish-brown.

[0133] S34. Collect the first solid material, and physically crush the collected first solid material, including grinding the first solid material thoroughly in an agate mortar to obtain a powder. Then wash the powder material with ultrapure water until the washing mixture is neutral to obtain a neutral material.

[0134] S35. The neutral substance is filtered to obtain a second solid substance; the second solid substance is placed in a vacuum drying oven at 60°C and heated and vacuum dried for 6 hours to obtain a dried substance.

[0135] S36. Collect 200mg of dried material and place it in a 250mL Erlenmeyer flask. Add 200mL of deionized water. Place the dried material with added deionized water in an ultrasonic cleaner for ultrasonic peeling for 24h. After that, take it out and let it stand for 1h. Absorb the supernatant to obtain the first supernatant.

[0136] S37. Centrifuge the first supernatant at 3000 rpm for 5 minutes, discard the solid, and obtain the second supernatant.

[0137] S38. Centrifuge the second supernatant again at 10,000 rpm for 5 minutes, then discard the supernatant again to obtain the third solid.

[0138] S39. The third solid is dried in a vacuum freeze dryer for 12 hours to obtain the deodorizer.

[0139] Figure 3 This is a comparison of the UV-Vis diffuse reflectance spectra of deodorizing agent a and deodorizing agent b under the same preparation method as in Example 3; wherein, deodorizing agent a is a deodorizing agent prepared using thiourea, water, concentrated nitric acid, and freeze-dried Staphylococcus aureus powder, and deodorizing agent b is a deodorizing agent prepared using thiourea, water, and concentrated nitric acid (i.e., the addition of freeze-dried Staphylococcus aureus powder is omitted in steps S31 and S32, and the remaining steps S33 to S29 are the same); Figure 3 It is evident that the light absorption of deodorant b, which is synthesized without the addition of Staphylococcus aureus, is concentrated in the ultraviolet region, with the edge of the absorption band around 450nm. In contrast, deodorant a, which is synthesized with the addition of Staphylococcus aureus, not only has strong absorption in the ultraviolet region but also has a certain absorption in the visible light region, with the edge of the absorption band red-shifted to around 700nm, greatly improving the utilization rate of visible light.

[0140] like Figure 4 As shown, according to the Kubelka-Munk formula: α = A(hν - Eg) n / 2 / hν, where α is the absorption coefficient; A is a constant; h is Planck's constant; ν is the frequency of the incident light; Eg is the band structure; for dipole transitions allowed in direct bandgap semiconductors, n=1(αhν). 2 The intercept of the tangent line on the photon energy curve on the horizontal axis reveals that the band gap of the deodorizer in this application is 1.96 eV, which is much lower than the 3.2 eV of TiO2. The wide light absorption range and narrow band gap indicate that this deodorizer has a unique electronic structure, better visible light absorption performance, and good catalytic performance.

[0141] like Figure 5 As shown, according to an embodiment of the third aspect of the present invention, a deodorizing component 200 is provided, including a housing 210, a deodorizing agent 100 as described in any of the above embodiments, and a light source component 220; wherein, the housing 210 defines a receiving space 211; the housing 210 is provided with a vent 212; the deodorizing agent 100 as described in any of the above embodiments is disposed in the receiving space 211; the light source component 220 is disposed in the receiving space 211, and the light emitted by the light source component 220 can illuminate the deodorizing agent 100.

[0142] In this embodiment, the housing 210 of the deodorizing component 200 forms a well-ventilated accommodating space 211. The light source component 220 is disposed at the top of the accommodating space 211 and emits light downward to illuminate various parts within the accommodating space 211 over a wider area. The emitting light source includes an LED light source component, which is attached to the inner top wall of the housing 210 by adhesive. The deodorizing agent is placed on the inner bottom wall of the housing 210 so that the light emitted by the light source component 220 can completely illuminate the surface of the deodorizing agent, thereby enabling the deodorizing agent to perform its deodorizing function.

[0143] Optionally, the deodorizing agent is processed into a porous block; or, the deodorizing component 200 further includes a substrate 230, and the deodorizing agent is disposed in the receiving space 211 in one or more ways, including: adhering to the surface of the substrate 230, placing it in the substrate 230, and bonding it to the substrate 230.

[0144] In this embodiment, the odor-removing component 200 has a substrate 230 in its accommodating space 211 for placing the odor-removing agent; wherein, the substrate 230 is an object with adsorption function, and the odor-removing agent is attached to the surface of the substrate 230; and / or, the substrate 230 is a placement position with accommodating function, and the odor-removing agent is placed in the placement position; and / or, the substrate 230 is a carrier material that can be connected with the odor-removing agent, wherein the connection method includes, but is not limited to, adsorption, chemical bond Au-S bond, Cu-S bond bonding, and the odor-removing agent is placed in the accommodating space after being connected with the carrier material.

[0145] Optionally, the substrate 230 includes one or more of the following: activated carbon substrate 231, metal mesh substrate, and ceramic substrate; wherein the activated carbon substrate 231 is honeycomb-shaped, and the deodorizing agent is attached to the surface of the activated carbon substrate 231.

[0146] In this embodiment, the substrate 230 includes various types; among them, the activated carbon substrate 231 is a honeycomb activated carbon substrate, and the deodorizing agent is adsorbed on the outer surface of the honeycomb activated carbon substrate. Due to the loose structure and air permeability of the honeycomb activated carbon substrate, the deodorizing agent can better exert its deodorizing performance under the action of airflow. The preparation method of adsorbing the deodorizing agent onto the surface of the honeycomb activated carbon substrate includes the following steps: weigh 1 part by weight of deodorizing agent into an agate mortar, add 20 parts by weight of ethanol, and grind thoroughly into a paste to obtain a paste deodorizing agent; place the paste deodorizing agent into a beaker, add 80 parts of anhydrous ethanol, and ultrasonically disperse for 2 hours to obtain a deodorizing agent dispersion; place a predetermined volume of honeycomb activated carbon substrate into the deodorizing agent dispersion and magnetically stir for 2 hours to make the deodorizing agent uniformly adhere to the surface of the honeycomb activated carbon substrate; take out the honeycomb activated carbon substrate with the deodorizing agent attached, and dry it under an infrared lamp to complete the process. The shape of the honeycomb activated carbon substrate includes, but is not limited to, cuboids and spheres.

[0147] In this embodiment, the preparation method of adsorbing the deodorizing agent onto the surface of the honeycomb activated carbon substrate includes the following steps:

[0148] Weigh 1 part by weight of the deodorizing agent into an agate mortar, add 20 parts by weight of ethanol, and grind thoroughly into a paste to obtain a paste-like deodorizing agent. Place the paste-like deodorizing agent into a beaker, add 80 parts of anhydrous ethanol, and ultrasonically disperse for 2 hours to obtain a deodorizing agent dispersion. Decompose a large piece of honeycomb activated carbon matrix into multiple sub-honeycomb activated carbon matrices. Place all sub-honeycomb activated carbon matrices into the deodorizing agent dispersion and magnetically stir for 2 hours to ensure that the deodorizing agent is evenly adhered to the surface of each sub-honeycomb activated carbon matrix. Remove the sub-honeycomb activated carbon matrices with the deodorizing agent attached and dry them under an infrared lamp to obtain multiple sub-honeycomb activated carbon matrices with the deodorizing agent attached. In use, place multiple sub-honeycomb activated carbon matrices together inside the deodorizing component housing.

[0149] In one embodiment, the deodorizing component 200 further includes a metal mesh substrate, to which the deodorizing agent is attached.

[0150] In one embodiment, the deodorizing component 200 further includes a ceramic substrate to which the deodorizing agent is attached; wherein the ceramic substrate is not limited to a specific shape.

[0151] In one embodiment, the odor-removing component 200 includes an odor-removing agent. The odor-removing component 200 is not attached to any substrate surface, and the odor-removing component itself is processed into a honeycomb structure.

[0152] In one embodiment, the deodorizing component 200 includes a deodorizing matrix, and the deodorizing agent is bonded to the deodorizing matrix through one or both of the following chemical bonds: Au-S bond and Cu-S bond.

[0153] Optionally, the deodorizing component 200 may also include a fan circulation system 240 disposed within the housing space 211 of the deodorizing component 200.

[0154] In this embodiment, the housing 210 is provided with a vent 212 to ensure ventilation inside the deodorizing component 200; a fan circulation system 240 is provided in the accommodating space 211 to increase the air exchange and circulation inside and outside the deodorizing component 200, so that the outside air with odors enters into the deodorizing component 200 for deodorization, and the deodorized air flows out to the outside of the deodorizing component 200 through the fan circulation system 240, so that the outside air with odors can be deodorized.

[0155] In one embodiment, the vent 212 includes an air inlet and an air outlet; a fan circulation system is installed around the air inlet, and the air entering through the air inlet can be drawn into the accommodating space 211 by the fan; the base 230 is located above the air outlet, covering at least part of the air outlet; the air in the accommodating space 211 passes through the base 230 under the action of the fan circulation system 240, and after being deodorized by the deodorizing agent in the base 230, it flows out through the air outlet.

[0156] like Figure 6 As shown, according to an embodiment of a fourth aspect of the present invention, a refrigeration device 400 is provided, including a device body 410 and a deodorizing component 200 as described in any of the above embodiments; wherein the device body 410 defines a refrigeration space 411; and the deodorizing component 200 as described in any of the above embodiments is disposed within the refrigeration space 411.

[0157] In this embodiment, the deodorizing component 200 is placed on top of the refrigeration space 411 of the refrigeration device 400 and is fixedly connected to the device body 410 of the refrigeration device 400. It is not easy to fall off and will not obstruct the storage and retrieval of items. The fixing methods of the deodorizing component 200 include, but are not limited to, strong magnetic fixing, screw fixing, snap fixing, and adhesive fixing.

[0158] In one embodiment, a deodorizing component 200 shelf is provided on the top of the refrigeration space 411 of the refrigeration device 400, wherein the shelf is hollow and the deodorizing component 200 is detachably placed in the shelf.

[0159] In this embodiment, the deodorizing component 200 is used in refrigeration equipment such as refrigerators, freezers, and freezers; the deodorizing component 200 is also used in washing and care equipment, air conditioning, workshop deodorization, and sewage treatment.

[0160] Specific embodiments are provided below to further illustrate the odor-removing components of this disclosure.

[0161] Example 4 Odor Removal Component

[0162] like Figure 5As shown, a deodorizing component 200 includes: a housing 210 defining a receiving space 211; the housing 210 having a vent 212; a deodorizing agent 100 disposed within the receiving space 211; and a light source assembly 220 disposed within the deodorizing space 211, the light source assembly 220 being an LED light group, and the light emitted by the light source assembly 220 being able to illuminate the deodorizing agent 100. The deodorizing component 200 also includes a block-shaped substrate 230, wherein the deodorizing agent 100 is processed into a porous block shape; or, the deodorizing agent 100 is attached to the surface of the substrate 230. The vent 212 includes an air inlet and an air outlet; the air inlet is disposed on the side wall of the housing 210, and the air outlet is disposed on the bottom wall of the housing 210; the block-shaped deodorizing agent 100 and / or the substrate 230 with the deodorizing agent 100 attached to its surface are placed on the inner bottom wall of the housing 210, covering at least part of the air outlet. The light source assembly 220 is disposed above the deodorizing agent 100 and / or the substrate 230; the air inlet is disposed beside the deodorizing agent; the deodorizing assembly 220 also includes a fan circulation system 240 disposed between the air inlet and the deodorizing agent 100 in the deodorizing assembly 200; the fan circulation system 240 includes a fan, which draws the gas outside the housing 210 into the housing 210, and after being deodorized by the deodorizing agent 100, it flows out to the outside of the housing 210 through the air outlet.

[0163] The following test uses the deodorizing component of Example 4, in which the deodorizing agent used is the same as that of Example 2, to demonstrate its deodorizing performance. For comparison, a standard deodorizing agent without the addition of Gram-dried bacterial powder was prepared.

[0164] The raw materials for the common deodorizer include the following components: 1-3 parts of thiourea, 0.1-0.5 parts of concentrated nitric acid and 15-20 parts of water. The preparation process is the same as that of the preparation method in Example 3, except that the freeze-dried Staphylococcus aureus powder is omitted in the raw materials in step S31 and the step of adding it is omitted in step S32. All other steps S33 to S39 are the same.

[0165] This disclosure presents a comparison data table of the odor removal effect data using ordinary deodorizers and the odor removal effect data using the deodorizer of Example 3 in this application under the same conditions.

[0166] Table 1 below shows a comparison of the odor removal effects of using a common deodorizer (deodorizer b) and the odor removal effects of using deodorizer 100 (deodorizer a) under the same conditions. The common deodorizer is based on deodorizer 100 without the addition of Gram-rich lyophilized powder; the contents of other components are the same as deodorizer 100. Furthermore, the common deodorizer and deodorizer 100 are prepared using the same method. The data in Table 1 were obtained according to the following experimental steps: trimethylamine and methanethiol gases were introduced into an 80L well-sealed deodorization simulation chamber, with the initial concentrations of trimethylamine and methanethiol at 2-12 mg / m³. 3Between cycles, circulate ventilation for 2 minutes and collect the initial concentration of the sample; then turn on the deodorizing component 200 and deodorize for 2 hours, collecting the concentration of the sample after deodorization. Each gas was tested multiple times, and data were collected. The deodorization rate was calculated as [(initial gas concentration - final gas concentration) / initial gas concentration] × 100%. The test results are shown in Table 1. Table 1 shows that the deodorizing agent based on this application has a better deodorization effect, with a deodorization rate of over 90%; ordinary deodorizing agents have a generally lower deodorization effect, with a deodorization rate below 20%.

[0167] Table 1

[0168]

[0169] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments.

[0170] Furthermore, the terminology used in this application is for descriptive purposes only and is not intended to limit the claims. As used in the description of the embodiments and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application refers to any and all possible combinations of one or more of the associated listed terms.

[0171] Furthermore, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Unless otherwise specified, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element.

[0172] In this document, each embodiment focuses on describing the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0173] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0174] The methods and products disclosed in the embodiments herein (including but not limited to devices, equipment, etc.) can be implemented in other ways.

[0175] The embodiments disclosed herein are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A deodorizing agent, characterized in that, It is prepared from raw materials comprising the following components, in parts by weight: 1-2 parts thiourea, 0.002-0.005 parts lyophilized Gram bacteria powder, 0.1-0.4 parts concentrated nitric acid and 10-25 parts water; wherein the lyophilized Gram bacteria powder includes lyophilized Gram-negative bacteria powder and / or lyophilized Gram-positive bacteria powder. The preparation of the deodorizing agent includes: heating a mixture of thiourea, freeze-dried Gram bacteria powder, concentrated nitric acid and water to obtain a first solid, crushing the first solid to obtain a powder, washing it until neutral, then treating it with ultrasound, letting it stand, taking the supernatant, then performing a first-stage centrifugation to remove some solids, performing a second-stage centrifugation on the supernatant obtained from the first-stage centrifugation, taking the solid, and vacuum drying to obtain the deodorizing agent.

2. The deodorizing agent according to claim 1, characterized in that, It is prepared from raw materials comprising the following components, in parts by weight: 1.5 parts thiourea, 0.004 parts lyophilized Staphylococcus aureus powder, 0.28 parts concentrated nitric acid and 20 parts water.

3. The deodorizing agent according to claim 1, characterized in that, The Gram-negative bacteria lyophilized powder includes Escherichia coli lyophilized powder and / or Pseudomonas aeruginosa lyophilized powder. The Gram-positive bacteria lyophilized powder includes Staphylococcus aureus lyophilized powder and / or Bacillus subtilis lyophilized powder.

4. A method for preparing an odor-removing agent, comprising the following steps: The deodorizing agent according to any one of claims 1 to 3 is prepared by comprising thiourea, Gram-dried bacterial powder, concentrated nitric acid, and water; Thiourea, freeze-dried Gram bacteria powder, and concentrated nitric acid were added to water in sequence and mixed well to obtain a homogeneous mixture. The mixture was heated with microwaves to obtain a first solid. The first solid is physically crushed to obtain a powder, and then the powder is washed with ultrapure water until the washing mixture is neutral to obtain a neutral substance. The neutral substance is filtered to obtain a second solid; the second solid is heated and vacuum dried to obtain a dried product. The dried material is added to deionized water and ultrasonically treated for 12-24 hours, then allowed to stand to obtain the first supernatant; wherein the weight ratio of the dried material to the deionized water is 1:0.8-1.

5. The first supernatant is centrifuged at a first rotation speed, and the solid is discarded to obtain the second supernatant; wherein, the first rotation speed is 3000-4000 rpm; The second supernatant is centrifuged at a second rotation speed, and the supernatant is discarded to obtain a third solid; wherein the second rotation speed is greater than the first rotation speed; The third solid is freeze-dried under vacuum for 12-24 hours to obtain the deodorizing agent.

5. The preparation method according to claim 4, characterized in that... The first solid is physically crushed to obtain a powder, including: grinding the first solid in a grinding bowl; The grinding bowl mentioned therein is an agate grinding bowl.

6. A deodorizing component, characterized in that, include: The housing (210) defines an accommodating space (211), and the housing (210) is provided with a vent (212). A deodorizing agent is disposed within the containing space (211); the deodorizing agent includes the deodorizing agent as described in any one of claims 1-3 or the deodorizing agent prepared by the method described in claim 4 or 5; A light source assembly (220) is disposed within the receiving space (211), and the light emitted by the light source assembly (220) can illuminate the deodorizing agent (100).

7. The deodorizing component according to claim 6, characterized in that, The deodorizing agent is processed into a porous block; or, the deodorizing component further includes a substrate, and the deodorizing agent is disposed in the accommodating space (211) in one or more ways, such as being attached to the surface of the substrate (230), placed in the substrate (230), and bonded to the substrate (230).

8. The deodorizing component according to claim 7, characterized in that, The matrix includes: One or more of activated carbon matrix (231), metal mesh matrix and ceramic matrix; The activated carbon substrate (231) is honeycomb-shaped, and the deodorizing agent (100) is attached to the surface of the activated carbon substrate (231).

9. The deodorizing component according to any one of claims 7 to 8, characterized in that, Also includes: A fan circulation system (240) is provided within the deodorization component (200).

10. A refrigeration device, characterized in that, include: The main body of the equipment (410) defines the cooling space (411). The deodorizing component (200) as described in any one of claims 6 to 9 is disposed within the cooling space (411).

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