Photocatalytic odor removal system, refrigeration equipment and odor removal method of refrigeration equipment

Abstract

The invention provides a photocatalytic odor removal system, refrigeration equipment and an odor removal method of the refrigeration equipment, the photocatalytic odor removal system comprises an ultraviolet lamp assembly, a photocatalyst and activated carbon, the photocatalyst and the activated carbon are arranged on a light path of the ultraviolet lamp assembly, and the photocatalytic odor removal system further comprises a weight sensor and a controller, the weight sensor is arranged at the bottom of the photocatalyst and the activated carbon and is used for detecting the weight of the photocatalyst and the activated carbon; wherein the photocatalyst is immobilized on the upper surface of the activated carbon and faces the light-emitting surface of the ultraviolet lamp assembly; and the controller is used for adjusting the working parameters of the ultraviolet lamp assembly according to the weight of the photocatalyst and the active carbon. The problem that heat is generated when a photocatalyst immobilized on activated carbon is irradiated, so that gas adsorbed after the activated carbon is heated is desorbed into the environment, and secondary pollution is caused is solved, the risk of secondary pollution is reduced to a great extent, energy waste is reduced, and the purification stability is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of odor removal of refrigeration equipment, and in particular to a photocatalytic odor removal system, refrigeration equipment and an odor removal method for refrigeration equipment. Background Art

[0002] During the use of refrigeration equipment such as refrigerators and fresh-keeping cabinets, odors will be generated due to the storage of various foods. These odors not only affect the user experience, but may also have a certain impact on the freshness and preservation of food. Therefore, developing effective odor removal technology for refrigeration equipment is an important aspect of improving the quality of refrigerators.

[0003] Photocatalysis is a technology that uses light energy to drive chemical reactions, usually using specific semiconductor materials (such as titanium dioxide TiO2) as catalysts. Under light conditions, photocatalysts can absorb light energy, generate electron-hole pairs, and then oxidize or reduce reactants to achieve the degradation of pollutants, decomposition of water, or synthesis of other chemicals. Activated carbon is a porous carbon material with high adsorption properties. It is widely used in air purification, water treatment, environmental governance, food processing, chemical industry, medicine and other fields. Activated carbon can only adsorb exhaust gas but cannot completely purify it. Photocatalysis can completely purify exhaust gas, but the purification efficiency of low-concentration exhaust gas is not high. Immobilizing photocatalysts on activated carbon materials can combine the advantages of both and purify gases with high efficiency. However, ultraviolet light not only has a photoexcitation effect, but also a photothermal effect. When irradiating the photocatalyst immobilized on activated carbon, heat is generated, causing the activated carbon to heat up. After the activated carbon heats up, the gas adsorbed on it is easily desorbed into the environment to cause secondary pollution.

[0004] Therefore, the prior art needs to be further developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a photocatalytic deodorization system, a refrigeration device and a deodorization method for refrigeration equipment, so as to solve the technical problem in the related art that when the photocatalyst immobilized on the activated carbon is irradiated, heat is generated, causing the activated carbon to heat up, and after the activated carbon heats up, the gas adsorbed on it is easily desorbed into the environment to cause secondary pollution.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: According to the first aspect of the present invention, the present invention provides a photocatalytic deodorization system, comprising: an ultraviolet lamp assembly, and a photocatalyst and activated carbon arranged in the light path of the ultraviolet lamp assembly, the photocatalytic deodorization system also includes:

[0007] A weight sensor is arranged at the bottom of the photocatalyst and the activated carbon, and is used to detect the weight of the photocatalyst and the activated carbon; wherein the photocatalyst is fixed on the upper surface of the activated carbon, facing the light-emitting surface of the ultraviolet lamp assembly;

[0008] A controller, used to adjust the operating parameters of the ultraviolet lamp assembly according to the weight of the photocatalyst and the activated carbon;

[0009] The working parameters include at least: a start frequency, an irradiation time and an input voltage.

[0010] Specifically, the vertical distance between the ultraviolet lamp assembly and the photocatalyst is between 1 cm and 2 cm, and the ultraviolet lamp assembly includes at least one ultraviolet lamp bead for vertically irradiating the photocatalyst.

[0011] Specifically, the photocatalyst includes titanium dioxide, and the particle size of the photocatalyst is less than 100 nm.

[0012] Specifically, the activated carbon includes honeycomb activated carbon, the surface of the honeycomb activated carbon is porous, and the pore size is between 1 mm and 10 mm.

[0013] Specifically, the photocatalyst is immobilized on the upper surface of the activated carbon, including:

[0014] The activated carbon is immersed in a solution of a photocatalyst and then dried;

[0015] Alternatively, a photocatalyst solution is sprayed on the surface of the activated carbon and then dried.

[0016] Specifically, the photocatalytic odor removal system is installed in the air duct of the carrier;

[0017] The carrier includes: refrigeration equipment.

[0018] According to a second aspect of the present invention, there is provided a refrigeration device, comprising:

[0019] The photocatalytic odor removal system mentioned above.

[0020] Specifically, the refrigeration equipment includes a refrigerator, a refrigerated display cabinet, and a fresh-keeping cabinet.

[0021] According to a third aspect of the present invention, a method for deodorizing a refrigeration device is provided, the method comprising:

[0022] S100, detecting the weight of the photocatalyst and the activated carbon;

[0023] S200. Adjusting the operating parameters of the ultraviolet lamp assembly according to the weight of the photocatalyst and the activated carbon; the operating parameters at least include: a start frequency, an irradiation time, and an input voltage.

[0024] Specifically, the detection of the weight of the photocatalyst and the activated carbon includes:

[0025] According to the maximum adsorption capacity of the activated carbon, the maximum weight of the photocatalyst and the activated carbon is obtained and recorded as the first weight. The weight of the photocatalyst and the activated carbon varies between 0 and the first weight.

[0026] Specifically, the S200 includes:

[0027] Obtaining a ratio of the weight of the photocatalyst and the activated carbon to the first weight, and determining whether the ratio is greater than a first preset value, and if so, the controller outputs an instruction to replace the photocatalyst and the activated carbon;

[0028] If not, the switching frequency, irradiation time and input voltage of the ultraviolet lamp assembly are adjusted according to the weight of the photocatalyst and the activated carbon.

[0029] Specifically, adjusting the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly according to the weight of the photocatalyst and the activated carbon includes:

[0030] The turning-on frequency, irradiation time and input voltage of the ultraviolet lamp assembly are preset, and the turning-on frequency, irradiation time and input voltage of the ultraviolet lamp assembly are selected correspondingly according to the weight of the photocatalyst and the activated carbon, so that when the ultraviolet lamp assembly irradiates the photocatalyst, the rate of decomposing odorous gases is greater than the rate of desorption of odorous gases by the activated carbon under the irradiation of the ultraviolet lamp assembly.

[0031] Specifically, the opening frequency, irradiation duration and input voltage of the corresponding ultraviolet lamp assembly are selected according to the weight of the photocatalyst and the activated carbon, so that when the ultraviolet lamp assembly irradiates the photocatalyst, the rate of decomposing the odorous gas is greater than the rate of desorption of the odorous gas by the activated carbon under the irradiation of the ultraviolet lamp assembly, including:

[0032] The weight of the photocatalyst and activated carbon is divided into multiple intervals, each interval corresponds to a different level of activated carbon adsorbing odor gas molecules;

[0033] Under different gears, the opening frequency, irradiation time and input voltage of the corresponding ultraviolet lamp assembly are selected as preset parameters under the corresponding gear.

[0034] Specifically, if the number of gears is 8, the corresponding UV lamp assembly opening frequency, irradiation duration and input voltage are selected as preset parameters under the corresponding gears, including:

[0035] The values ​​of the working parameters of the UV lamp assembly are preset as follows:

[0036] The opening frequency of the ultraviolet lamp assembly is preset to a first preset frequency F1, a second preset frequency F2 and a third preset frequency F3, wherein F1 <F2<F3;

[0037] Presetting the irradiation time of the ultraviolet lamp assembly to a first preset time T1, a second preset time T2, and a third preset time T3, wherein T1>T2>T3;

[0038] The input voltage of the ultraviolet lamp assembly is preset to a first preset voltage U1, a second preset voltage U2, and a third preset voltage U3, wherein U1 <U2<U3。

[0039] Specifically, if the number of gears is 8, the corresponding UV lamp assembly opening frequency, irradiation time and input voltage are selected as preset parameters under the corresponding gear under different gears, and further includes:

[0040] The weight of the photocatalyst and the activated carbon is recorded as M, and the first weight is recorded as M1;

[0041] If 0<M≤0.1M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the first gear, and the corresponding preset parameters are F1, T2 and U1;

[0042] If 0.1M1<M≤0.2M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the second gear, and the corresponding preset parameters are F1, T1 and U1;

[0043] If 0.2M1<M≤0.3M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the third gear, and the corresponding preset parameters are F1, T1 and U2;

[0044] If 0.3M1<M≤0.4M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the fourth gear, and the corresponding preset parameters are F1, T2 and U3;

[0045] If 0.4M1<M≤0.5M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the fifth gear, and the corresponding preset parameters are F2, T2 and U2;

[0046] If 0.5M1<M≤0.6M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the sixth gear, and the corresponding preset parameters are F2, T2 and U3;

[0047] If 0.6M1<M≤0.7M1, it is determined that the gear of the activated carbon adsorbing odor gas molecules is the seventh gear, and the corresponding preset parameters are F3, T3 and U2;

[0048] If 0.7M1<M≤0.8M1, it is determined that the gear position of the activated carbon in adsorbing odorous gas molecules is the eighth gear, and the corresponding preset parameters are F3, T3 and U3.

[0049] Specifically, the method further includes:

[0050] When M>0.8M1, the controller outputs an instruction to replace the photocatalyst and activated carbon, and the photocatalyst and activated carbon are replaced.

[0051] Beneficial effects:

[0052] The present invention monitors the weight of the activated carbon-immobilized photocatalyst material by arranging a weight sensor, and adjusts the operating parameters of the ultraviolet lamp assembly, such as the opening frequency, irradiation duration, and input voltage, according to the weight of the activated carbon-immobilized photocatalyst material, thereby solving the technical problem that heat is generated when the photocatalyst immobilized on the activated carbon is irradiated, causing the activated carbon to heat up, and the gas adsorbed on the activated carbon is easily desorbed into the environment after the activated carbon heats up, causing secondary pollution. According to the amount of odorous gas molecules adsorbed by the activated carbon, different combinations of operating parameters of the ultraviolet lamp assembly are used to achieve the best purification effect, which greatly reduces the risk of causing secondary pollution, reduces energy waste, and greatly improves the stability of purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a schematic diagram of the composition of a photocatalytic deodorization system provided in a specific embodiment of the present invention;

[0054] Figure 2 is a schematic diagram of a refrigerator with a photocatalytic deodorization system provided in a specific embodiment of the present invention;

[0055] Figure 3 is a flow chart of a method for deodorizing a refrigeration device provided in a specific embodiment of the present invention;

[0056] Figure 4 is a flow chart of the working parameter control of the ultraviolet lamp assembly provided in a specific embodiment of the present invention;

[0057] Wherein, the reference numerals of the above-mentioned drawings are as follows:

[0058] 1. Refrigerator; 2. UV lamp assembly; 3. Photocatalyst; 4. Activated carbon; 5. Weight sensor; 6. Photocatalytic deodorization system. DETAILED DESCRIPTION

[0059] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0060] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0061] Embodiment 1

[0062] See also Figure 1 to Figure 2 This embodiment provides a photocatalytic deodorization system, including an ultraviolet lamp assembly 2, and a photocatalyst 3 and activated carbon 4 arranged on the light path of the ultraviolet lamp assembly 2. The photocatalytic deodorization system also includes:

[0063] A weight sensor 5 is arranged at the bottom of the photocatalyst 3 and the activated carbon 4, and is used to detect the weight of the photocatalyst 3 and the activated carbon 4; wherein the photocatalyst 3 is fixed on the upper surface of the activated carbon 4, facing the light-emitting surface of the ultraviolet lamp assembly 2;

[0064] A controller, used to adjust the working parameters of the ultraviolet lamp assembly 2 according to the weight of the photocatalyst 3 and the activated carbon 4;

[0065] The working parameters include at least: a start frequency, an irradiation time and an input voltage.

[0066] See also Figure 1 In the photocatalytic deodorization system 6 of the present embodiment, a weight sensor 5 is provided to monitor the weight of the photocatalyst 3 material immobilized on the activated carbon 4 in real time, and the switching frequency of the ultraviolet light, the irradiation time and the input voltage are adjusted according to the weight of the photocatalyst 3 material immobilized on the activated carbon 4. This solves the technical problem that heat is generated when the photocatalyst immobilized on the activated carbon is irradiated, causing the activated carbon to heat up, and the gas adsorbed on the activated carbon is easily desorbed into the environment after the activated carbon heats up, causing secondary pollution. This greatly reduces the risk of secondary pollution, reduces energy waste, and greatly improves the purification stability.

[0067] It is understandable that the weight change of the photocatalyst 3 and activated carbon 4 is related to the adsorption of odor gas molecules by activated carbon 4. The more odor gas molecules adsorbed, the greater the weight of the photocatalyst 3 and activated carbon 4. The weight change of the photocatalyst 3 and activated carbon 4 is also related to the purification and decomposition of odor gas molecules by the ultraviolet light of the ultraviolet lamp assembly 2 when the photocatalyst 3 is irradiated with the ultraviolet light, and the photothermal effect causes the odor gas molecules to desorb. The more thoroughly the odor gas molecules are purified, the more they are desorbed, and the smaller the weight of the photocatalyst 3 and activated carbon 4 is.

[0068] Specifically, the vertical distance between the ultraviolet lamp assembly 2 and the photocatalyst 3 is between 1 cm and 2 cm, and the ultraviolet lamp assembly 2 includes at least one ultraviolet lamp bead for vertically irradiating the photocatalyst 3 .

[0069] In some specific embodiments, the ultraviolet lamp in the ultraviolet lamp assembly 2 can be a mercury lamp or an LED lamp. The mercury lamp has a higher energy output, while the LED lamp has the advantages of energy saving and long life. Different application scenarios can select the appropriate type of ultraviolet lamp according to their own needs (such as cost, use environment, etc.), which enhances the adaptability of the entire device. The wavelength is between 265nm and 385nm, so that the ultraviolet light can be effectively absorbed by the photocatalyst 3, stimulating the electronic transition of the photocatalyst 3, thereby starting the photocatalytic reaction and improving the decomposition efficiency of the odor gas molecules. The angle of the ultraviolet lamp assembly 2 irradiating the photocatalyst 3 is vertical irradiation, which can maximize the effective contact area between the ultraviolet light and the surface of the photocatalyst 3, thereby maximizing the photocatalytic activity of the photocatalyst 3 and improving the efficiency of photocatalytic deodorization. When the vertical distance between the ultraviolet lamp assembly 2 and the photocatalyst 3 is between 1cm and 2cm, this relatively close distance is conducive to the efficient transfer of ultraviolet light energy to the surface of the photocatalyst 3, enabling the photocatalyst 3 to receive stronger ultraviolet light energy, thereby improving the efficiency of the photocatalytic reaction.

[0070] Specifically, the photocatalyst 3 includes titanium dioxide, and the particle size of the photocatalyst is less than 100 nm.

[0071] In some specific embodiments, the type of photocatalyst 3 can be a semiconductor such as titanium dioxide, with a particle size of less than 100nm. Titanium dioxide as a photocatalyst 3 has high chemical stability. Under various complex environmental conditions, such as different pH, temperature and humidity, it can maintain its own chemical structure stability and is not easily deactivated by chemical reactions. This enables the system with titanium dioxide as the photocatalyst to operate stably for a long time, reducing the cost of frequent replacement of the photocatalyst 3. When the particle size of the photocatalyst 3 is less than 100nm, the nanometer-level particle size allows the unit mass of titanium dioxide to have more surface atoms, thereby providing more active sites, greatly improving the efficiency of the photocatalytic reaction. In addition, the photocatalyst 3 can also include zinc oxide (ZnO), bismuth oxide (Bi 2 O 3 ) and other metal oxide photocatalysts, as well as non-oxide photocatalysts such as cadmium sulfide (CdS) and copper sulfide (CuS).

[0072] Specifically, the activated carbon 4 includes honeycomb activated carbon, the surface of which is porous and has a pore size between 1 mm and 10 mm.

[0073] In some specific embodiments, the surface of the honeycomb activated carbon is porous, which facilitates the passage of gas, and the honeycomb activated carbon has a unique honeycomb structure, which reduces the wind resistance of the gas when passing through the activated carbon, thereby reducing the energy consumption of the ventilation equipment and allowing the air to pass through the activated carbon layer more smoothly, thereby improving the operating efficiency of the entire system. The pore size is between 1 mm and 10 mm, which can provide a larger specific surface area and provide more adsorption sites for the adsorbate molecules. The larger specific surface area means that the activated carbon can fully contact with the adsorbed odor gas molecules, thereby improving the adsorption efficiency.

[0074] Specifically, the photocatalyst 3 is immobilized on the upper surface of the activated carbon 4, including:

[0075] The activated carbon 4 is immersed in the solution of the photocatalyst 3 and then dried;

[0076] Alternatively, a solution of the photocatalyst 3 is sprayed on the surface of the activated carbon 4 and then dried.

[0077] In some specific embodiments, by soaking the activated carbon 4 in the solution of the photocatalyst 3, the photocatalyst molecules can be dispersed more evenly on the surface of the activated carbon 4, and the solution can penetrate into the pores of the activated carbon, so that the photocatalyst 3 is relatively evenly distributed on the surface of the activated carbon. After drying, the photocatalyst 3 is firmly fixed on the surface of the activated carbon 4, ensuring the stability and long-term effectiveness of the photocatalytic system. Spraying the photocatalyst solution onto the surface of the activated carbon 4 can accurately control the loading area of ​​the photocatalyst. For some activated carbon application scenarios with specific shapes or requiring local photocatalytic functions, the spraying method can accurately load the photocatalyst 3 where it is needed, avoiding unnecessary waste, and also better meeting specific functional requirements. Therefore, whether it is soaking or drying after spraying, fixing the photocatalyst on the surface of the activated carbon can enhance the synergistic effect of photocatalysis and adsorption. The adsorption of the activated carbon 4 can enrich the target pollutants on its surface, increase the concentration of pollutants around the photocatalyst, thereby improving the efficiency of the photocatalytic reaction. At the same time, the drying process helps to fix the position of the photocatalyst on the surface of the activated carbon, further enhancing the stability of the composite structure formed by the two.

[0078] Specifically, the photocatalytic odor removal system 6 is installed in the air duct of the carrier;

[0079] The carrier includes: refrigeration equipment.

[0080] It can be understood that since the photocatalytic deodorization system 6 can decompose odorous substances and microorganisms, it reduces the possibility of dirt and biofilm formation in the air duct of the refrigeration equipment, helps to keep the air duct unobstructed, and reduces the risk of air duct blockage, thereby ensuring the refrigeration efficiency of the refrigeration equipment and the normal air circulation.

[0081] It should be noted here that the present embodiment provides a photocatalytic odor removal system, which monitors the weight of the activated carbon-immobilized photocatalyst material by setting a weight sensor, and adjusts the operating parameters of the ultraviolet lamp assembly, such as the opening frequency, irradiation duration, and input voltage, according to the weight of the activated carbon-immobilized photocatalyst material. This solves the technical problem that when the ultraviolet lamp is used to irradiate the photocatalyst immobilized on the activated carbon, heat is generated, causing the activated carbon to heat up, and the gas adsorbed on the activated carbon is easily desorbed into the environment after the activated carbon heats up, causing secondary pollution. According to the amount of odorous gas adsorbed, different combinations of working parameters of the ultraviolet lamp assembly are used to achieve the best purification effect, which greatly reduces the risk of secondary pollution, reduces energy waste, and greatly improves the purification stability.

[0082] Embodiment 2

[0083] See also Figure 2 , this embodiment provides a refrigeration device, the refrigeration device comprising:

[0084] The photocatalytic deodorization system 6 described in Example 1.

[0085] Specifically, the refrigeration equipment includes a refrigerator 1, a refrigerated display cabinet, and a fresh-keeping cabinet.

[0086] In some specific embodiments, when the gas in the storage space of the refrigeration equipment passes through the activated carbon 4, the activated carbon 4 has a long-term adsorption effect, and the photocatalyst 3 is immobilized on the surface of the activated carbon 4. The photocatalyst 3 produces a specific purification effect under the irradiation of the ultraviolet lamp assembly 2. The startup logic of the ultraviolet lamp assembly 2 is integrated on the main control board of the refrigeration equipment. After the refrigeration equipment is powered on, the ultraviolet lamp assembly 2 can be powered on and operated.

[0087] In some specific embodiments, the photocatalytic odor removal system 6 can be applied to refrigerators 1, refrigerated display cabinets, fresh-keeping cabinets and other refrigeration equipment, and can also be combined with antibacterial functions and applied to medical refrigerators, which can not only handle the odor that may be generated by medicines or biological samples, but also ensure the sterility of the internal environment, thereby meeting the strict hygiene standards of medical refrigerators. Considering the transportation refrigeration equipment, it can also be applied to refrigerated trucks or refrigerated containers. In such large refrigeration equipment, the photocatalytic odor removal system 6 needs to cope with a larger space and a complex logistics environment. The scale, layout and operating parameters of the photocatalytic odor removal system can be adjusted in combination with the characteristics of the transportation refrigeration equipment to ensure the preservation effect of the goods during long-distance transportation. In addition, it can also be applied in smart refrigerators or smart refrigerated display cabinets. The photocatalytic odor removal system 6 can be connected to a sensor network, for example, working in conjunction with an odor sensor, a microbial sensor, etc. When the sensor detects an increase in the concentration of odor or an increase in the number of microorganisms, the photocatalytic odor removal system 6 can automatically adjust its operating mode, such as increasing the light intensity or increasing the adsorption of activated carbon, to quickly respond to potential pollution risks.

[0088] It should be noted here that the present embodiment provides a refrigeration equipment, which monitors the weight of the activated carbon-immobilized photocatalyst material by setting a weight sensor, and adjusts the operating parameters of the ultraviolet lamp assembly such as the opening frequency, irradiation time and input voltage according to the weight of the activated carbon-immobilized photocatalyst material, thereby solving the technical problem that heat is generated when the photocatalyst immobilized on the activated carbon is irradiated, causing the activated carbon to heat up, and the gas adsorbed on the activated carbon is easily desorbed into the environment after the activated carbon heats up, causing secondary pollution. According to the amount of adsorbed odorous gas molecules, different combinations of working parameters of the ultraviolet lamp assembly are used to achieve the best purification effect, which greatly reduces the risk of secondary pollution, reduces energy waste, and greatly improves the purification stability.

[0089] Embodiment 3

[0090] See also Figure 3 This embodiment provides a method for removing odor from a refrigeration device, the method comprising:

[0091] S100, detecting the weight of the photocatalyst 3 and the activated carbon 4;

[0092] S200, adjusting the working parameters of the ultraviolet lamp assembly 2 according to the weight of the photocatalyst 3 and the activated carbon 4; the working parameters at least include: opening frequency, irradiation time and input voltage.

[0093] See also Figure 3 In the deodorization method of this embodiment, by detecting the weight of the photocatalyst 3 and the activated carbon 4, and adjusting the operating parameters such as the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 according to the weight of the photocatalyst 3 and the activated carbon 4, the technical problem that heat is generated when the photocatalyst immobilized on the activated carbon is irradiated, causing the activated carbon to heat up, and the gas adsorbed on the activated carbon is easily desorbed into the environment after the activated carbon heats up, causing secondary pollution, is solved. According to the amount of odorous gas adsorbed, different combinations of working parameters of the ultraviolet lamp assembly are used to achieve the best purification effect, which greatly reduces the risk of secondary pollution, reduces energy waste, and greatly improves the purification stability.

[0094] Specifically, the detection of the weight of the photocatalyst 3 and the activated carbon 4 includes:

[0095] According to the maximum adsorption capacity of the activated carbon 4, the maximum weight of the photocatalyst 3 and the activated carbon 4 is obtained and recorded as the first weight. The weight of the photocatalyst 3 and the activated carbon 4 varies between 0 and the first weight.

[0096] It can be understood that in the deodorization method of this embodiment, the activated carbon 4 has a saturated adsorption capacity, that is, the maximum weight that the activated carbon 4 can adsorb. The saturated adsorption capacity is only related to the adsorption capacity of the activated carbon. Therefore, at any time, the weight of the photocatalyst 3 and the activated carbon 4 monitored by the weight sensor 5 is between 0 and the saturated adsorption capacity, that is, the first weight. Knowing the saturated adsorption capacity of the activated carbon 4 in advance can more accurately evaluate the weight range level of the currently monitored photocatalyst 3 and activated carbon 4, and thus can more accurately evaluate the purification capacity of the current photocatalytic deodorization system.

[0097] Specifically, the S200 includes:

[0098] Obtaining a ratio of the weight of the photocatalyst 3 and the activated carbon 4 to the first weight, and determining whether the ratio is greater than a first preset value, and if so, the controller outputs an instruction to replace the photocatalyst 3 and the activated carbon 4;

[0099] If not, the switching frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 are adjusted according to the weight of the photocatalyst 3 and the activated carbon 4 .

[0100] It can be understood that in the deodorization method of this embodiment, when it is monitored that the weight of the photocatalyst 3 and the activated carbon 4 is close to the first weight, an instruction to replace the photocatalyst 3 and the activated carbon 4 is issued, because at this time there are too many odor gas molecules adsorbed on the activated carbon 4. Even without the photothermal effect of the ultraviolet lamp, the odor gas molecules adsorbed on the activated carbon 4 will slowly desorb, thereby causing secondary pollution to the environment. In this embodiment, the first preset value is preferably 0.8, that is, when the ratio of the weight of the photocatalyst 3 and the activated carbon 4 to the first weight exceeds 0.8, it means that the weight of the odor gas adsorbed on the activated carbon 4 has reached When the saturated adsorption capacity reaches 80%, the photocatalyst 3 and the activated carbon 4 need to be replaced to ensure that the adsorption capacity of the activated carbon 4 and the decomposition capacity of the photocatalyst 3 under the irradiation of the ultraviolet lamp assembly 2 are balanced. When the ratio of the weight of the photocatalyst 3 and the activated carbon 4 to the first weight is less than or equal to 0.8, it is necessary to adjust the operating parameters such as the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 according to the real-time monitored weight of the photocatalyst 3 and the activated carbon 4 to avoid the desorption of odorous gas molecules adsorbed on the activated carbon 4, which in turn causes secondary pollution to the environment, thereby ensuring the stability of the photocatalytic deodorization system to a large extent.

[0101] Specifically, the switching frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2 are adjusted according to the weight of the photocatalyst 3 and the activated carbon 4, including:

[0102] The turning-on frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 are preset, and the turning-on frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 are selected correspondingly according to the weight of the photocatalyst 3 and the activated carbon 4, so that when the ultraviolet lamp assembly 2 irradiates the photocatalyst 3, the rate of decomposing the odorous gas is greater than the rate at which the activated carbon 4 desorbs the odorous gas under the irradiation of the ultraviolet lamp assembly 2.

[0103] In the deodorization method of this embodiment, the ultraviolet light of the ultraviolet lamp assembly 2 directly irradiates the photocatalyst 3 so that the photocatalyst 3 is excited to generate electrons and holes, and then the odor gas molecules are oxidized at a decomposition rate v1. The ultraviolet light irradiation produces a photothermal effect so that the odor gas molecules on the activated carbon 4 are desorbed at a desorption rate v2. Both v1 and v2 are related to the operating parameters such as the start-up frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2. During the startup interval of the ultraviolet lamp assembly 2, the activated carbon 4 continuously adsorbs the odor gas molecules, so that the weight of the photocatalyst 3 and the activated carbon 4 continues to increase, and the saturated adsorption amount is (first weight) compared, if the adsorbed odor gas molecules are more, the ability of the activated carbon 4 to fix the odor gas molecules is poor. If a higher voltage, a longer irradiation time and a faster irradiation frequency are adopted, v2 will be greater than v1, and the odor gas molecules will return to the air before they can be purified. Therefore, in order to achieve a better purification effect, it is necessary to comprehensively set the opening frequency, irradiation time and input voltage according to the adsorption amount, so that v1 is greater than v2 during purification, ensuring that while purifying the odor gas molecules, the odor gas molecules will not be desorbed due to the photothermal effect, further avoiding secondary pollution of the environment.

[0104] It should be noted here that, in a closed container with an odor gas concentration sensor, different combinations of ultraviolet lamp working parameters (opening frequency, irradiation time and input voltage) can be used for photocatalysts 3 and activated carbon 4 of different weights to monitor the changes in odor gas concentration in the closed container space and the weight changes of the photocatalyst 3 and activated carbon 4. If the weight of the photocatalyst 3 and activated carbon 4 continues to decrease and the odor gas concentration sensor does not detect the generation of odor gas, then under the current combination of ultraviolet lamp working parameters, the decomposition rate V1 of the odor gas is greater than or equal to the desorption rate V2 of the odor gas, and the working parameter combination of the ultraviolet lamp is the preferred purification combination of the photocatalyst 3 and activated carbon 4 at this weight level; if the odor gas sensor can monitor the generation of odor gas, then under the current combination of ultraviolet lamps, the decomposition rate V1 of the odor gas is less than the desorption rate V2 of the odor gas, and the working parameter combination of the ultraviolet lamp does not meet the purification requirements of the photocatalyst 3 and activated carbon 4 at this weight level.

[0105] Specifically, according to the weight of the photocatalyst 3 and the activated carbon 4, the corresponding opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2 are selected, so that when the ultraviolet lamp assembly 2 irradiates the photocatalyst 3, the rate of decomposing the odorous gas is greater than the rate of desorption of the odorous gas by the activated carbon 4 under the irradiation of the ultraviolet lamp assembly 2, including:

[0106] The weight of the photocatalyst 3 and the activated carbon 4 is divided into a plurality of intervals, each interval corresponding to a different level of the activated carbon 4 adsorbing odorous gas molecules;

[0107] Under different gears, the corresponding opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2 are selected as preset parameters under the corresponding gear.

[0108] It can be understood that in some specific embodiments, different weight ranges of the photocatalyst 3 and the activated carbon 4 and the corresponding gears of the activated carbon 4 for adsorbing odor gas molecules can be pre-set in the controller. At the same time, multiple different working parameters such as the opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2 can be pre-set as preset parameters required for the activated carbon 4 to adsorb odor gas molecules at different gears, so as to adapt to the different gears to meet the balance of decomposition and desorption of odor gas molecules. This graded processing method can adapt to different load conditions, and different weight combinations represent different processing capacity requirements. The photocatalytic deodorization system can automatically adjust the working parameters of the ultraviolet lamp assembly 2 according to the actual weight conditions, so that no matter what the load is, the efficient odor gas treatment effect can be maintained.

[0109] Specifically, if the number of gears is 8, the corresponding opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2 are selected as preset parameters under the corresponding gears, including:

[0110] The values ​​of the working parameters of the ultraviolet lamp assembly 2 are preset as follows:

[0111] The opening frequency of the ultraviolet lamp assembly 2 is preset to a first preset frequency F1, a second preset frequency F2 and a third preset frequency F3, wherein F1 <F2<F3;

[0112] The irradiation time of the ultraviolet lamp assembly 2 is preset to a first preset time T1, a second preset time T2, and a third preset time T3, wherein T1>T2>T3;

[0113] The input voltage of the ultraviolet lamp assembly 2 is preset to a first preset voltage U1, a second preset voltage U2, and a third preset voltage U3, wherein U1 <U2<U3。

[0114] In some specific embodiments, the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 can be set to three different values ​​respectively. By setting three different opening frequencies, irradiation time and input voltage, the requirements of the photocatalyst 3 and the activated carbon 4 for the working parameters of the ultraviolet lamp assembly 3 under 8 gears can be more accurately matched. Different gears may correspond to different photocatalytic reactions and the working states of activated carbon adsorption and desorption. Multiple parameter settings can provide more detailed adjustments to ensure that at each gear, the ultraviolet lamp assembly 2 can stimulate the activity of the photocatalyst 3 in the most appropriate way, while taking into account the adsorption-desorption equilibrium of the activated carbon 4, so as to achieve high efficiency in the treatment of odorous gases. In actual applications, the environmental conditions inside the refrigeration equipment and the performance of the photocatalyst 4 and the activated carbon 4 may vary with the change of use time. Setting working parameters with multiple values ​​can make the system more flexible to adapt to these different working conditions. There is a corresponding combination of preset parameters under each gear position, so that the system can work according to the predetermined mode during operation. This helps to avoid problems such as unstable photocatalytic reaction or imbalance of activated carbon adsorption-desorption due to unreasonable parameter settings, thereby extending the service life of the photocatalytic deodorization system 6 and greatly improving the intelligence and stability of the present invention.

[0115] Specifically, if the number of gears is 8, the corresponding opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly 2 are selected as preset parameters under the corresponding gear under different gears, and further include:

[0116] The weight of the photocatalyst 3 and the activated carbon 4 is recorded as M, and the first weight is recorded as M1;

[0117] If 0<M≤0.1M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the first gear, and the corresponding preset parameters are F1, T2 and U1;

[0118] If 0.1M1<M≤0.2M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the second gear, and the corresponding preset parameters are F1, T1 and U1;

[0119] If 0.2M1<M≤0.3M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the third gear, and the corresponding preset parameters are F1, T1 and U2;

[0120] If 0.3M1<M≤0.4M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the fourth gear, and the corresponding preset parameters are F1, T2 and U3;

[0121] If 0.4M1<M≤0.5M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the fifth gear, and the corresponding preset parameters are F2, T2 and U2;

[0122] If 0.5M1<M≤0.6M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the sixth gear, and the corresponding preset parameters are F2, T2 and U3;

[0123] If 0.6M1<M≤0.7M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the seventh gear, and the corresponding preset parameters are F3, T3 and U2;

[0124] If 0.7M1<M≤0.8M1, it is determined that the gear of the activated carbon 4 for adsorbing odorous gas molecules is the eighth gear, and the corresponding preset parameters are F3, T3 and U3.

[0125] It can be understood that the above-mentioned example of setting 8 gears illustrates the working process of selecting the corresponding opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 as the preset parameters under the corresponding gear under different gears. The setting of the working parameters such as the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 can be set according to the actual needs of the user and the inherent characteristics of the activated carbon 4 and photocatalyst 3 materials used. The present invention does not impose further restrictions on the setting of the gear, so that the selected preset parameter combination can adapt to the requirements of the balance between the decomposition and desorption of odor gas molecules in different gears, thereby ensuring the purification ability of the photocatalytic deodorization system 6.

[0126] Specifically, the method further includes:

[0127] When M>0.8M1, the controller outputs an instruction to replace the photocatalyst 3 and the activated carbon 4, and the photocatalyst 3 and the activated carbon 4 are replaced.

[0128] It is understandable that when the weight M of the photocatalyst 3 and activated carbon 4 is greater than 0.8M1, it means that the photocatalyst 3 and activated carbon 4 have adsorbed a large amount of odorous gas molecules during long-term use. At this time, replacing the photocatalyst 3 and activated carbon 4 can ensure that the system continues to maintain a high odorous gas purification efficiency. If they are not replaced in time, the activity of the photocatalyst 3 will decrease, and the adsorption capacity of the activated carbon 4 will also weaken, thereby affecting the decomposition and adsorption effect of the entire photocatalytic deodorization system on odorous gas molecules. The controller outputs a replacement instruction to replace the photocatalyst 3 and activated carbon 4, which can stabilize the function of the system. For example, in refrigeration equipment, a stable deodorization function is essential to maintaining the quality of the refrigeration environment. If the performance of the photocatalyst 3 and activated carbon 4 decreases and is not replaced, it may cause odorous gases to accumulate in the equipment, affecting the quality of refrigerated food. Timely replacement can avoid this situation and enable the system to always perform the deodorization function stably.

[0129] See also Figure 1 , Figure 2 and Figure 4The working principle of the present invention is specifically described below by taking the photocatalytic odor removal system 6 provided in the refrigerator as an example:

[0130] Figure 2 The present invention is a refrigerator 1 provided with a photocatalytic odor removal system 6. The photocatalytic odor removal system 6 is installed in the air duct of the refrigerator 1. The gas inside the refrigerator 1 is purified along with the cooling inside the refrigerator 1. Meanwhile, the refrigerator 1 is an intelligent refrigerator, equipped with a processor, a controller and a memory.

[0131] like Figure 1 As shown, the photocatalytic odor removal system 6 includes an ultraviolet lamp assembly 2, a photocatalyst 3, activated carbon 4 and a weight sensor 5;

[0132] The photocatalyst 3 is immobilized on the upper surface 4 of the activated carbon. The type of the photocatalyst 3 can be other semiconductors such as titanium dioxide, with a particle size of less than 100 nm. The type of the activated carbon 4 can be honeycomb activated carbon, which has a porous surface and is easy for gas to pass through. The pore size is between 1 mm and 10 mm. The immobilization method can be to immerse the activated carbon in a photocatalyst solution for a period of time and then take it out and dry it in an oven, or spray the photocatalyst solution on the surface of the activated carbon and then dry it;

[0133] The ultraviolet lamp assembly 2 irradiates the material surface on which the photocatalyst is immobilized. The distance between the ultraviolet lamp assembly 2 and the photocatalyst 3 is 1 cm to 2 cm. The irradiation angle is vertical. The ultraviolet lamp can be a mercury lamp or an LED lamp. The wavelength is 265 nm to 385 nm. The ultraviolet lamp assembly 2 can include one ultraviolet lamp bead or multiple ultraviolet lamp beads.

[0134] A weight sensor 5 is provided below the photocatalyst 3 and the activated carbon 4. The weight sensor 5 can monitor the weight changes of the photocatalyst 3 and the activated carbon 4 above, and feed back the weight M to the controller. The opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 are adjusted according to the weight of the photocatalyst 3 material fixed on the activated carbon 4. The greater the weight, the greater the amount of odorous gas adsorbed on the activated carbon 4.

[0135] The UV lamp assembly 2 irradiates the photocatalyst for a certain period of time before producing a photothermal effect. The higher the input voltage of the UV lamp assembly, the stronger the UV lamp power, the better the purification effect, and the stronger the thermal effect. Specifically, there are two situations:

[0136] (1) When the amount of gas adsorbed on the activated carbon 4 is small, a lower opening frequency, a longer irradiation time and a relatively lower input voltage are used;

[0137] (2) When there is more gas adsorbed on the activated carbon 4, a higher opening frequency, a shorter irradiation time and a relatively higher input voltage are used;

[0138] In the first case, the gas adsorbed on the activated carbon 4 is less, and the longer irradiation time and relatively low input voltage will not cause the adsorbed odorous gas to be released in large quantities to cause secondary pollution. At the same time, the long-term irradiation can ensure the purification effect;

[0139] In the second case, more gas is adsorbed on the activated carbon 4, so a shorter irradiation time is required to prevent the activated carbon 4 from heating up and causing a large amount of gas to be desorbed. However, in order to ensure the purification effect, a higher opening frequency and a relatively high input voltage are required.

[0140] The change in weight M of activated carbon 4 and photocatalyst 3 is related to the adsorption of odor gas molecules by activated carbon 4. The more odor gas molecules are adsorbed, the larger M is. The change in weight M is also related to the ultraviolet lamp assembly 2 irradiating the photocatalyst 3 to purify and decompose odor gas molecules and the photothermal effect to desorb odor gas molecules. The more thorough the purification and the more desorption, the smaller M is.

[0141] There is a saturated adsorption amount M1, which is only related to the adsorption capacity of the activated carbon 4. Therefore, the monitoring range of the weight sensor 5 is (0, M1), that is, the weight monitored by the weight sensor 5 at any time is M, 0<M<M1.

[0142] Three different start frequencies of the UV lamp assembly 2 are preset: F1, F2 and F3:

[0143] F1 means starting the UV lamp assembly 2 once every 12 hours within 24 hours, F2 means starting the UV lamp assembly 2 once every 6 hours within 24 hours, and F3 means starting the UV lamp assembly 2 once every 3 hours within 24 hours.

[0144] Three different irradiation durations of the UV lamp assembly 2 are preset: T1, T2 and T3:

[0145] T1 refers to uninterrupted irradiation for 2 hours after the ultraviolet lamp assembly 2 is started, T2 refers to uninterrupted irradiation for 1 hour after the ultraviolet lamp assembly 2 is started, and T3 refers to uninterrupted irradiation for 30 minutes after the ultraviolet lamp assembly 2 is started.

[0146] Three different input voltages of UV lamp assembly 2 are preset: U1, U2 and U3:

[0147] U1 means that the input voltage of the UV lamp assembly 2 is 5V, U2 means that the input voltage of the UV lamp assembly 2 is 12V, and U3 means that the input voltage of the UV lamp assembly 2 is 24V.

[0148] The specific workflow is as follows:

[0149] The deodorization function is turned on, that is, the deodorization function is turned on for a long time after the refrigerator 1 is turned on, the storage space and the purification component are connected, and the odor gas molecules are adsorbed by the activated carbon 4 when passing through the photocatalyst 3 and the activated carbon 4. The weight sensor 5 detects that M is constantly increasing, and the M data is fed back to the controller to select the combination of the working parameters of the ultraviolet lamp component 2. The specific selection rules are as follows:

[0150] If 0<M≤0.1M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the first gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F1, T2 and U1 respectively;

[0151] If 0.1M1<M≤0.2M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the second gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F1, T1 and U1 respectively;

[0152] If 0.2M1<M≤0.3M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the third gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F1, T1 and U2 respectively;

[0153] If 0.3M1<M≤0.4M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the fourth gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F1, T2 and U3 respectively.

[0154] If 0.4M1<M≤0.5M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the fifth gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F2, T2 and U2 respectively;

[0155] If 0.5M1<M≤0.6M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the sixth gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F2, T2 and U3 respectively;

[0156] If 0.6M1<M≤0.7M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the seventh gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F3, T3 and U2 respectively;

[0157] If 0.7M1<M≤0.8M1, it is determined that the odor gas molecules adsorbed on the activated carbon 4 are in the eighth gear, and the opening frequency, irradiation time and input voltage of the ultraviolet lamp assembly 2 used are F3, T3 and U3 respectively;

[0158] When it is monitored that M>0.8M1, an instruction is issued to replace the photocatalyst 3 and the activated carbon 4, because at this time there are too many odor gas molecules adsorbed on the activated carbon 4. Even without the photothermal effect of the ultraviolet lamp assembly 2, the odor gas molecules thereon will slowly desorb and cause secondary pollution.

[0159] It should be noted here that the present embodiment provides a method for removing odor from refrigeration equipment. A weight sensor is set to monitor the weight of the activated carbon-immobilized photocatalyst material, and the operating parameters of the ultraviolet lamp assembly, such as the opening frequency, irradiation duration, and input voltage, are adjusted according to the weight of the activated carbon-immobilized photocatalyst material. This solves the technical problem that heat is generated when the photocatalyst immobilized on the activated carbon is irradiated, causing the activated carbon to heat up, and the gas adsorbed on the activated carbon is easily desorbed into the environment after the activated carbon heats up, causing secondary pollution. According to the amount of odorous gas adsorbed, different combinations of operating parameters of the ultraviolet lamp assembly are used to achieve the best purification effect, which greatly reduces the risk of secondary pollution, reduces energy waste, and greatly improves the purification stability.

[0160] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0161] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0162] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0163] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0164] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A photocatalytic odor removal system, comprising: An ultraviolet lamp assembly (2), and a photocatalyst (3) and activated carbon (4) arranged on the light path of the ultraviolet lamp assembly (2), characterized in that it also includes: A weight sensor (5) is arranged at the bottom of the photocatalyst (3) and the activated carbon (4) and is used to detect the weight of the photocatalyst (3) and the activated carbon (4); wherein the photocatalyst (3) is fixed on the upper surface of the activated carbon (4) and faces the light-emitting surface of the ultraviolet lamp assembly (2); A controller, used for adjusting the working parameters of the ultraviolet lamp assembly (2) according to the weight of the photocatalyst (3) and the activated carbon (4); The working parameters include at least: a start frequency, an irradiation time and an input voltage.

2. The photocatalytic odor removal system according to claim 1, characterized in that: The vertical distance between the ultraviolet lamp assembly (2) and the photocatalyst (3) is between 1 cm and 2 cm, and the ultraviolet lamp assembly (2) comprises at least one ultraviolet lamp bead, which is used for vertically irradiating the photocatalyst (3).

3. The photocatalytic odor removal system according to claim 1, characterized in that: The photocatalyst (3) comprises titanium dioxide, and the particle size of the photocatalyst is less than 100 nm.

4. The photocatalytic odor removal system according to claim 1, characterized in that: The activated carbon (4) comprises honeycomb activated carbon, the surface of which is porous and has a pore size between 1 mm and 10 mm.

5. The photocatalytic odor removal system according to claim 1, characterized in that: The photocatalyst (3) is immobilized on the upper surface of the activated carbon (4), and comprises: The activated carbon (4) is immersed in a solution of the photocatalyst (3), and then dried; Alternatively, a solution of the photocatalyst (3) is sprayed on the surface of the activated carbon (4) and then dried.

6. The photocatalytic odor removal system according to any one of claims 1 to 5, characterized in that: The photocatalytic odor removal system (6) is installed in the air duct of the carrier; The carrier includes: refrigeration equipment.

7. A refrigeration device, characterized in that: include: The photocatalytic odor removal system (6) as described in claim 6.

8. The refrigeration device according to claim 7, characterized in that: The refrigeration equipment comprises a refrigerator (1), a refrigerated display cabinet, and a fresh-keeping cabinet.

9. A method for deodorizing refrigeration equipment, characterized in that: include: S100, detecting the weight of the photocatalyst (3) and the activated carbon (4); S200, adjusting the operating parameters of the ultraviolet lamp assembly (2) according to the weight of the photocatalyst (3) and the activated carbon (4); The working parameters include at least: a start frequency, an irradiation time and an input voltage.

10. The method for deodorizing a refrigeration device according to claim 9, characterized in that: The detecting the weight of the photocatalyst (3) and the activated carbon (4) comprises: According to the maximum adsorption capacity of the activated carbon (4), the maximum weight of the photocatalyst (3) and the activated carbon (4) is obtained and recorded as the first weight. The weight of the photocatalyst (3) and the activated carbon (4) varies between 0 and the first weight.

11. The method for deodorizing a refrigeration device according to claim 10, characterized in that: The S200 includes: Obtaining a ratio of the weight of the photocatalyst (3) and the activated carbon (4) to the first weight, determining whether the ratio is greater than a first preset value, and if so, the controller outputting an instruction to replace the photocatalyst (3) and the activated carbon (4); If not, the switching frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) are adjusted according to the weight of the photocatalyst (3) and the activated carbon (4).

12. The method for deodorizing a refrigeration device according to claim 11, characterized in that: The method of adjusting the switching frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) according to the weight of the photocatalyst (3) and the activated carbon (4) comprises: The values ​​of the switching frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) are preset, and the corresponding switching frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) are selected according to the weight of the photocatalyst (3) and the activated carbon (4), so that when the ultraviolet lamp assembly (2) irradiates the photocatalyst (3), the rate of decomposing the odorous gas is greater than the rate of desorbing the odorous gas by the activated carbon (4) under the irradiation of the ultraviolet lamp assembly (2).

13. The method for deodorizing a refrigeration device according to claim 12, characterized in that: The method comprises: selecting the corresponding opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) according to the weight of the photocatalyst (3) and the activated carbon (4), so that when the ultraviolet lamp assembly (2) irradiates the photocatalyst (3), the rate of decomposing the odorous gas is greater than the rate of desorption of the odorous gas by the activated carbon (4) under the irradiation of the ultraviolet lamp assembly (2), comprising: The weight of the photocatalyst (3) and the activated carbon (4) is divided into a plurality of intervals, each interval corresponding to a different level of the activated carbon (4) in adsorbing odorous gas molecules; Under different gears, the corresponding opening frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) are selected as preset parameters under the corresponding gear.

14. The method for deodorizing a refrigeration device according to claim 13, characterized in that: If the number of gears is 8, the corresponding switching frequency, irradiation duration and input voltage of the ultraviolet lamp assembly (2) are selected as preset parameters under the corresponding gears, including: The values ​​of the working parameters of the ultraviolet lamp assembly (2) are preset as follows: The switching frequency of the ultraviolet lamp assembly (2) is preset to a first preset frequency F1, a second preset frequency F2 and a third preset frequency F3, wherein F1 <F2<F3; The irradiation time of the ultraviolet lamp assembly (2) is preset to a first preset time T1, a second preset time T2, and a third preset time T3, wherein T1>T2>T3; The input voltage of the ultraviolet lamp assembly (2) is preset to a first preset voltage U1, a second preset voltage U2, and a third preset voltage U3, wherein U1 <U2<U3。 15. The method for deodorizing a refrigeration device according to claim 14, characterized in that: If the number of gears is 8, the corresponding UV lamp assembly (2) start-up frequency, irradiation duration and input voltage are selected as preset parameters under the corresponding gear under different gears, and further includes: The weight of the photocatalyst (3) and the activated carbon (4) is recorded as M, and the first weight is recorded as M1; If 0<M≤0.1M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the first gear, and the corresponding preset parameters are F1, T2 and U1; If 0.1M1<M≤0.2M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the second gear, and the corresponding preset parameters are F1, T1 and U1; If 0.2M1<M≤0.3M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the third gear, and the corresponding preset parameters are F1, T1 and U2; If 0.3M1<M≤0.4M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the fourth gear, and the corresponding preset parameters are F1, T2 and U3; If 0.4M1<M≤0.5M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the fifth gear, and the corresponding preset parameters are F2, T2 and U2; If 0.5M1<M≤0.6M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the sixth gear, and the corresponding preset parameters are F2, T2 and U3; If 0.6M1<M≤0.7M1, it is determined that the gear of the activated carbon (4) to adsorb odorous gas molecules is the seventh gear, and the corresponding preset parameters are F3, T3 and U2; If 0.7M1<M≤0.8M1, it is determined that the gear of the activated carbon (4) for adsorbing odorous gas molecules is the eighth gear, and the corresponding preset parameters are F3, T3 and U3.

16. The method for deodorizing a refrigeration device according to claim 15, characterized in that: The method further comprises: When M>0.8M1, the controller outputs an instruction to replace the photocatalyst (3) and the activated carbon (4), thereby replacing the photocatalyst (3) and the activated carbon (4).

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