CN112294991B

CN112294991B - Plasma sterilizing cabinet and sterilizing method

Info

Publication number: CN112294991B
Application number: CN201910703954.1A
Authority: CN
Inventors: 李小娇; 董玮利; 李超; 李枫; 马少云; 王涛; 刘定新; 郗旺
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2023-10-20
Anticipated expiration: 2039-07-31
Also published as: CN112294991A

Abstract

The application discloses a plasma sterilizing cabinet and a sterilizing method. The plasma generating module comprises a gas chamber, a discharge assembly is arranged in the gas chamber, and the gas chamber is provided with a gas outlet and a gas inlet. The power module provides high-voltage power for the discharge assembly, the air flow module conveys plasmas in the air chamber into the sterilization space, and the atomization module inputs fog into the sterilization space. The plasma generating module comprises an initial discharge stage and a stable discharge stage, wherein the gas chamber is closed in the initial discharge stage, and the gas chamber is opened in the stable discharge stage. The fog generated by the atomization module reacts with the plasma to generate strong oxidative active particles, so that the ozone concentration is reduced, and the sterilization rate is improved. The sterilizing cabinet can input plasma with low ozone concentration into a sterilizing space to realize sterilization.

Description

Plasma sterilizing cabinet and sterilizing method

Technical Field

The application relates to the technical field of disinfection cabinets, in particular to a plasma disinfection cabinet and a disinfection method.

Background

At present, the sterilizing cabinet generally adopts ultraviolet rays, high temperature, ozone and other modes for sterilization and disinfection. Ultraviolet sterilization range is limited, and sterilization is incomplete. High-temperature sterilization energy consumption is high, and some plastic kitchen ware which cannot resist high temperature cannot be sterilized at high temperature. Ozone has a remarkable sterilizing effect, but has strong pungent odor and certain toxicity. Excessive ozone can strongly stimulate the respiratory tract of people, cause symptoms such as sore throat, chest distress, cough and the like, and possibly cause bronchitis and emphysema; long-term working in high-concentration ozone environment can cause neurotoxicity, dizziness, headache, vision decline and memory deterioration of people.

Plasma sterilization has been used in medical applications, and the plasma is generated mainly by dielectric barrier discharge and corona discharge, and the discharge devices include DBD, glow, spark and Propeller Arc. The plasma technology can realize excellent sterilization effect, and the principle comprises three parts: active particle radical oxidation, high-speed particle breakdown, and ultraviolet photons. The sterilization process does not need high temperature, and meanwhile, the active particles can be rapidly diffused to a sterilization space in a gaseous mode, so that dead-angle-free sterilization is realized. The main reason for limiting the use of plasma technology is that a large amount of ozone is generated during the plasma discharge. The pungent odor and toxicity of ozone itself limit the use of plasma technology in everyday life.

In order to control the ozone concentration, three modes are adopted at present: shortens the plasma discharge time, improves the ambient temperature and promotes ozone decomposition by adding a catalyst.

Ozone concentration is reduced by shortening plasma discharge time, long period intermittent operation is often formed, for example, a refrigerator adopts discharge for 1min and rest for 30min, and the cycle mode is adopted. Although the sterilization effect can be achieved in the method, the power consumption is improved due to long-time standby, and the method is not suitable for other electric appliances with discontinuous power supply, such as washing machines, disinfection cabinets, water heaters, air conditioners and the like.

The ozone concentration is reduced by adopting a mode of increasing the ambient temperature, so that the power consumption is increased on one hand, and the period is prolonged and the working efficiency is reduced on the other hand because the ozone is slowly decomposed. Meanwhile, the method is not suitable for household appliances working at low temperature or normal temperature such as refrigerators, washing machines and the like.

The ozone decomposition is promoted by adopting a mode of adding the catalyst, and the phenomena of low efficiency, easy inactivation of the catalyst and the like are caused, so that the concentration of ozone is unstable and easily exceeds the standard.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

In view of the above, the application provides a plasma sterilizing cabinet, which realizes high-efficiency sterilization without dead angles by plasma and can reduce the concentration of ozone.

In order to achieve the aim of the application, the application is realized by adopting the following technical scheme:

the utility model provides a plasma sterilization sterilizer, includes the cabinet body, the internal portion of cabinet forms the sterilization space, still includes: the plasma generation module comprises a gas chamber and a discharge assembly arranged in the gas chamber, and a gas outlet and a openable gas inlet are arranged on the side wall of the gas chamber; the air flow module is communicated with the air outlet through a pipeline and is used for conveying plasma in the air chamber into the sterilization space; a power module that supplies a high voltage power to the discharge assembly; and the atomization module is arranged on the cabinet body and used for inputting fog into the sterilization space.

In order to realize the stoving of waiting disinfection article and further reduce ozone concentration, the sterilizer still includes: and the main heating module is used for drying the articles to be sterilized in the sterilizing space and decomposing ozone in the sterilizing space.

As a preferred embodiment, the main heating module is operated simultaneously with the plasma generating module in order to improve sterilizing efficiency.

As a preferred embodiment, the atomizing module comprises a shell, a water storage box is arranged in the shell, a fan is arranged above the water storage box, an ultrasonic atomizing sheet is arranged in the water storage box, an atomizing exhaust port is arranged on the shell, and the atomizing exhaust port is communicated with the sterilizing space.

Further, a baffle is arranged below the fan.

As a preferred embodiment, the air flow module comprises an air outlet conduit and an air pump, wherein the air pump is communicated with the air outlet through the pipeline, and the air outlet conduit is communicated with the sterilization space.

In order to further reduce the ozone concentration, the gas flow rate output by the gas flow module is 0.8L/min-5L/min.

As a preferred embodiment, the air inlet is communicated with an air inlet conduit, and the air inlet conduit is communicated with the sterilizing space or the external atmosphere.

In order to generate uniform plasmas and reduce ozone concentration, the discharge assembly comprises a high-voltage electrode, a ground electrode and a dielectric layer, wherein the dielectric layer is arranged between the high-voltage electrode and the ground electrode; the discharge power density of the discharge component is more than 0.17W/cm ² 。

The application also provides a disinfection method of the plasma disinfection cabinet, wherein the plasma generation module comprises an initial discharge stage and a stable discharge stage; when the plasma generation module is in the initial discharge stage, the air flow module is closed, the air inlet is closed, and the discharge assembly discharges to generate plasma; when the plasma generating module is in the stable discharge stage, the air flow module is started, the air inlet is opened, plasma in the air chamber enters the sterilization space through the air flow module, and external air enters the air chamber through the air inlet; and the atomization module inputs fog into the sterilization space.

Compared with the prior art, the application has the advantages and positive effects that:

the application provides a plasma sterilizing cabinet and a sterilizing method, which reduce ozone concentration and improve sterilizing efficiency through the synergistic effect of a plasma generating module, an air flow module and an atomizing module.

Other features and advantages of the present application will become apparent upon review of the detailed description of the application in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic diagram of an embodiment of a sterilizer of the present application;

FIG. 2 is a schematic view of a sterilizing cabinet according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a plasma generation module according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an embodiment of an atomizing module according to the present disclosure;

FIG. 5 is a schematic diagram showing the relationship between the discharge power and the ozone concentration in the embodiment of the sterilizing cabinet of the present application;

FIG. 6 is a schematic diagram of the relationship between the gas flow rate and the ozone concentration in an embodiment of the disinfection cabinet of the present application.

The device comprises a 100-plasma generating module, a 110-discharging assembly, a 111-high-voltage electrode, a 112-medium layer, a 113-ground electrode, a 120-air chamber, a 121-air inlet, a 122-air outlet, a 130-air inlet guide pipe, a 140-upper pressing plate, a 141-upper through hole, a 150-lower pressing plate, a 151-lower through hole, a 160-baffle piece, a 200-power module, a 300-cabinet body, a 310-sterilization space, a 320-inner container, a 400-main heating module, a 500-air flow module, a 510-air pump, a 520-air outlet guide pipe, a 600-atomization module, a 610-shell, a 620-water storage box, a 630-ultrasonic atomization sheet, a 640-fan, a 650-baffle plate, a 660-atomization air outlet and 670-water.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It should be noted that, in the description of the present application, terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The application discloses a plasma sterilizing and disinfecting cabinet, referring to fig. 1 to 4, wherein fig. 1 is a schematic diagram of a principle of the sterilizing cabinet, fig. 2 is a schematic diagram of a structure of the sterilizing cabinet, fig. 3 is a schematic diagram of a structure of a plasma generating module, and fig. 4 is a schematic diagram of a structure of an atomizing module. The sterilizing cabinet comprises a cabinet body 300, wherein a sterilizing space 310 is formed in the cabinet body 300, and articles to be sterilized are placed in the sterilizing space 310 for sterilization. The plasma sterilization and disinfection cabinet comprises a plasma generation module 100, a power supply module 200, an air flow module 500 and an atomization module 600. The plasma generating module 100 includes a gas chamber 120, a discharge assembly 110 is disposed in the gas chamber 120, and a gas outlet 122 and a openable gas inlet 121 are disposed on a sidewall of the gas chamber 120. The power module 200 supplies a high voltage power to the discharge assembly 110, so that the discharge assembly 110 generates plasma. The gas flow module 500 communicates with the gas outlet 122 through a pipe for delivering the plasma in the gas chamber 120 into the sterilization space 310. The atomizing module 600 is disposed on the cabinet 300, and is used for inputting mist into the sterilizing space 310.

The plasma generating module 100 comprises an initial discharging stage and a stable discharging stage, wherein in the initial discharging stage, the air flow module 500 is closed, the air outlet 122 is closed, the air chamber 120 is closed, the discharging component 110 generates plasma under the action of the power module 200, and after the initial discharging stage works for a period of time, the ozone concentration of the plasma in the air chamber 120 is reduced and stabilized; then, the plasma generating module 100 enters a stable discharge stage, at this time, the air flow module 500 is opened, the air inlet 121 is opened, the plasma with low ozone concentration in the air chamber 120 enters the sterilizing space 310 for sterilization, and at the same time, new air enters the air chamber for discharge to generate new plasma. At the same time, the mist generated by the atomizing module 600 reacts with the plasma generated in the sterilizing space 310 to generate strong oxidative active particles, so that the ozone concentration is reduced, and the sterilizing rate is improved. The sterilizing cabinet reduces ozone concentration and improves sterilizing efficiency through the synergistic effect of the plasma generating module 100, the air flow module 500 and the atomizing module 600

The plasma generated by the plasma generating module 100 is not directly input into the sterilizing space 310, but is input into the sterilizing space 310 for sterilization after the reaction inside the closed gas chamber 120 for a period of time, for example, 1-5min, after the plasma inside the gas chamber 120 is stabilized. The reason for this is that the discharge assembly 110 may store ozone and other active molecules in the plasma generated during the initial stage of discharge, and if the plasma containing ozone is directly introduced into the sterilization space 310 for sterilization, the odor and toxicity of the ozone may adversely affect the user. The ozone and the active molecules are very unstable at the initial stage of discharge, and the ozone and other active molecules react, so that after the plasma containing a certain amount of ozone and active molecules generated at the initial stage of discharge reacts in the closed air chamber 120 for a period of time, the ozone and other active molecules react with each other in the air chamber to reduce the ozone concentration, and then the plasma with low ozone concentration is input into the sterilizing space 310 for sterilization, thereby realizing omnibearing sterilization without dead angles and avoiding adverse effects caused by ozone. The plasma generation module 100 makes full use of the characteristic that the plasma generated by the discharge assembly 110 at the initial stage of discharge is unstable, and provides a reaction space for the unstable plasma by using the closed gas chamber 120, and inputs the plasma into the sterilization space 310 for sterilization after the concentration of ozone is reduced after the reaction.

Further, the discharge assembly 110 adopts the dielectric barrier discharge form in the prior art, and referring to fig. 3, the discharge assembly 110 includes a high-voltage electrode111. A ground electrode 113 and a dielectric layer 112, the dielectric layer 112 being provided between the high-voltage electrode 111 and the ground electrode 113; the discharge power density of the discharge assembly 110 is greater than 0.17W/cm ² . The discharge power density is increased by increasing the discharge power of the discharge assembly 110, reducing the discharge area. Increasing the discharge power density helps to reduce the ozone concentration. Fig. 5 is a schematic diagram showing the relationship between the discharge power and the ozone concentration, and it can be seen from the figure that the greater the discharge power density, the lower the ozone concentration.

Further, the high voltage electrode 111 and the ground electrode 113 are connected to the power module 200, and the high voltage power provided by the power module 200 includes sinusoidal high voltage and pulsed high voltage power. Specifically, in the embodiment, the frequency of the sinusoidal high-voltage power supply is 50Hz-100MHz, the voltage amplitude is 1kV-20kV, and the frequency of the pulsed high-voltage power supply is lower than 100kHz. The high voltage power supply thus arranged contributes to the generation of a uniform plasma with a low ozone concentration.

As a preferred embodiment, the air flow module 500 includes an air outlet duct 520 and an air pump 510, the air pump 510 being in communication with the air outlet 122 through a pipe, and the end of the air outlet duct 520 being in communication with the sterilization space 310. When the plasma generating module 100 is in the stable discharge phase, the plasma in the gas chamber 120 enters the sterilization space 310 through the gas outlet pipe 520 by the gas pump 510.

Further, the flow rate of the gas outputted from the gas flow module 500 is preferably 0.8L/min to 5L/min. The active components in the plasma change with the change of the gas circulation rate, and the ozone concentration of the embodiment is reduced with the reduction of the gas circulation rate through a plurality of experiments. Fig. 6 shows the relationship between the gas flow rate and the ozone concentration measured in three different time periods, and it can be seen from fig. 6 that the ozone concentration increases with an increase in the gas flow rate and decreases with a decrease in the gas flow rate, so that the gas flow rate needs to be controlled in a lower range section in order to decrease the ozone concentration. By reasonably controlling the air pump 510, the flow rate of the air blown out of the air pump can not only input the plasma into the sterilization space 310, but also help to reduce the ozone concentration.

In other embodiments, the airflow module 500 may also be a fan disposed at the air outlet 122, where the air outlet 122 communicates with the sterilization space 310, and the plasma in the air chamber 120 enters the sterilization space 310 under the blowing action of the fan.

Further, an auxiliary heating module (not shown) is provided in the air chamber 120 for decomposing ozone in the air chamber to further reduce the ozone concentration. The specific structural form of the auxiliary heating module is not particularly limited, and the auxiliary heating module adopts PTC hot air, heating sheets and the like. The heating temperature of the auxiliary heating module is preferably not lower than 60 ℃ so as to ensure that ozone can be effectively decomposed and the ozone concentration is reduced.

The sterilizing cabinet further comprises a main heating module 400 which serves in two ways, on the one hand for drying the articles to be sterilized in the sterilizing space and, on the other hand, for decomposing small amounts of ozone present in the sterilizing space. Wherein, the drying effect is mainly and the ozone decomposing effect is auxiliary. The specific structural form of the main heating module 400 is not particularly limited in the present application, such as PTC hot air, a heating sheet, etc.

The heating temperature of the main heating module 400 is 30-80 c, preferably 60 c. The main heating module 400 in the temperature range can dry the articles to be sterilized and decompose ozone.

The main heating module 400 operates simultaneously with the plasma generating module 100, that is, the main heating module 400 simultaneously dries and decomposes ozone, which helps to shorten the sterilization time and provide the sterilization efficiency. In the existing disinfection cabinets, for example, an ozone disinfection cabinet, two procedures of drying and decomposing ozone by heating are separately operated, a large amount of ozone enters a disinfection space, then the disinfection is performed by utilizing the ozone, after the disinfection is completed, the heating module is started to decompose the ozone, and after the ozonolysis is completed, the heating module is continuously heated to realize drying. The procedures of sterilization, ozone decomposition and drying are completed independently, so that the sterilization time of the sterilizing cabinet is greatly prolonged, and the efficiency is low. In this embodiment, the concentration of ozone contained in the plasma generated by the plasma generating module 100 is low before the plasma enters the sterilizing space 310, so that the plasma entering the sterilizing space 310 can meet the use requirement even if the ozone decomposing operation is not performed. The main heating module 400 can decompose a small amount of ozone which is still stored while performing a drying operation, further reduce the concentration of ozone, and improve the usability of the sterilizing cabinet.

The plasma generation module is described in detail below.

The discharge assembly 110 is sandwiched between an upper platen 140 and a lower platen 150, and the upper platen 140, the high-voltage electrode 111, the dielectric layer 112, the ground electrode 113, and the lower platen 150 are sequentially adhered from top to bottom. The upper pressing sheet 140 is provided with an upper through hole 141 for heat dissipation of the high-voltage electrode 111. The lower pressure plate 150 is provided with a lower through hole 151, the lower through hole 151 is communicated with the inside of the gas chamber 120, and plasma generated by the discharge assembly 110 enters the inside of the gas chamber 120 through the lower through hole 141. The high voltage electrode 111 may be selected from the metals aluminum, copper, iron, platinum or alloys thereof, preferably copper, stainless steel. The ground electrode 113 may be selected from a sheet, wire, mesh, spiral or hybrid type, and is preferably mesh. Dielectric layer 112 may be an insulating layer, preferably ceramic, such as glass, ceramic, plastic, or rubber. The air chamber 120 and the lower pressure plate 140 are sealed together, the air chamber 120 is made of an insulator such as glass, ceramic, plastic, etc., and for convenient observation, a transparent texture is preferred, and the shape of the air chamber 120 can be designed according to requirements.

An air intake duct 130 is connected to the air intake 121, and the air intake duct 130 is connected to the sterilizing space 310 or the outside atmosphere. The air inlet 121 is further provided with an openable baffle 160, after the air flow module 500 is opened, the plasma in the air chamber 120 flows out through the air outlet 122, at this time, the pressure in the air chamber 120 changes, and the baffle 160 is opened to open the air inlet 121, so that the air in the sterilization space 310 or the external atmosphere enters the air chamber 120 through the air inlet conduit 130. The baffle 160 is preferably a self-hanging louver or a film, fiber, sheet, or the like having self-hanging properties.

The air entering the interior of the air chamber 120 through the air inlet 121 may be air from outside the sterilizer or air from within the sterilization space 310 depending on the installation location of the air inlet duct 130. When the end of the air intake duct 130 is installed at the outside of the cabinet, the air intake duct 130 communicates with the outside air of the sterilizing cabinet, and introduces the outside air. When the tip of the air intake duct 130 is installed inside the sterilizing space 310, the air intake duct 130 communicates with the air inside the sterilizing space 310, and introduces the inside air.

Referring to fig. 4, the atomization module 600 includes a housing 610, a water storage box 620 is disposed in the housing 610, a fan 640 is disposed above the water storage box 620, an ultrasonic atomization plate 630 is disposed in the water storage box 620, an atomization air outlet 660 is disposed on the housing 610, and the atomization air outlet 660 is communicated with the sterilization space 310. The water in the water storage box 620 generates mist under the action of the ultrasonic atomizing sheet 630, and the mist enters the sterilization space 310 through the atomizing exhaust port 660 under the blowing action of the fan 640. The mist reacts with the plasma in the sterilization space 310 to generate highly oxidizing active particles, which helps to reduce the ozone concentration and improve the sterilization rate.

In this embodiment, the atomization module 600 is disposed at the front side of the upper portion of the cabinet 300, and the atomization air outlet 660 is communicated with the sterilization space 310 via the inner container 320 of the cabinet.

Further, the water storage box 620 is drawable to facilitate the user to add water thereto.

Further, a baffle 650 is arranged below the fan 640 to prevent water droplets generated in the ultrasonic process from splashing on the fan 640 to influence the performance of the fan 640.

Furthermore, the atomization rate is preferably 0.1-5 mL/min, and on the basis of meeting the ozone decomposition requirement, excessive mist can be prevented from affecting the drying of the articles to be disinfected.

The disinfection cabinet of the embodiment has two working modes, namely intermittent discharge and continuous discharge.

When the first intermittent discharge is adopted, the specific working mode adopted in the embodiment is that the operation is 10min, the operation is stopped for 5min, and one disinfection task of the disinfection cabinet is completed in two periods, namely, the total disinfection time of the disinfection cabinet is 30min. After the disinfection cabinet starts a disinfection task, the power module 200 starts to supply power to the plasma generation module 100, the plasma generation module 100 enters an initial discharge stage firstly, preferably 2min after working for 1-5min, the plasma generation module 100 enters a stable discharge stage, plasma in the air chamber 120 enters the disinfection space 310 for disinfection, meanwhile, new air enters the air chamber 120 for discharge to generate new plasma, when the total discharge of the plasma generation module 100 reaches 10min, the power module 200 stops supplying power to the discharge assembly 110, the discharge assembly 110 is prevented from continuously discharging to damage components, and the discharge of the first period is completed. After stopping the discharging assembly 110 for 5 minutes, the power module 200 supplies power to the discharging assembly 110 again, and repeats the work flow of the first cycle. After the discharge of two cycles is completed, the disinfection of the disinfection cabinet is completed. The main heating module 400, the auxiliary heating module, and the atomizing module 600 are all in operation during the entire sterilization process.

When the second continuous discharging is adopted, the specific working mode adopted in the embodiment is that the operation is performed for 10min, the operation is stopped for 10min, and the sterilizing task of the sterilizing cabinet can be completed by discharging for one period, namely, the total sterilizing time of the sterilizing cabinet is 20min. After the disinfection cabinet starts a disinfection task, the power module 200 starts to supply power to the discharge assembly 110, the plasma generation module 100 enters an initial discharge stage firstly, preferably 2min after working for 1-5min, the plasma generation module 100 enters a stable discharge stage, plasma in the air chamber 120 enters the disinfection space 310 for disinfection, and meanwhile, new air enters the air chamber for discharge to generate new plasma, and when the total discharge of the plasma generation module 100 reaches 10min, the power module 200 stops supplying power to the discharge assembly 110, so that the discharge assembly 110 is prevented from continuously discharging to damage components. After the discharge assembly 110 is stopped for 10 minutes, the purpose of this stage is mainly to decompose the ozone remaining in the sterilization space 310, further reducing the ozone concentration, and the sterilization task of the sterilization cabinet is completed. The main heating module 400, the auxiliary heating module, and the atomizing module 600 are all in operation during the entire sterilization process.

The ozone content in the plasma generated by the disinfection cabinet of the embodiment is very low, and the ozone concentration is further reduced under the action of the airflow module 500 and the atomization module 600, so that the disinfection efficiency is improved while the omnibearing and dead-angle-free disinfection of the plasma is realized, adverse effects caused by ozone can be avoided, the disinfection time of the disinfection cabinet can be shortened, and the disinfection efficiency is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a plasma sterilization sterilizer, includes the cabinet body, the internal portion of cabinet forms sterilization space, its characterized in that still includes:

the plasma generation module comprises a gas chamber and a discharge assembly arranged in the gas chamber, and a gas outlet and a openable gas inlet are arranged on the side wall of the gas chamber;

the air flow module is communicated with the air outlet through a pipeline and used for conveying plasma in the air chamber into the sterilization space, and comprises an air outlet conduit and an air pump, wherein the air pump is communicated with the air outlet through the pipeline, and the air outlet conduit is communicated with the sterilization space;

a power module that supplies a high voltage power to the discharge assembly;

the atomization module is arranged on the cabinet body and used for inputting mist into the sterilization space, the atomization module comprises a shell, a water storage box is arranged in the shell, a fan is arranged above the water storage box, an ultrasonic atomization sheet is arranged in the water storage box, an atomization exhaust port is arranged on the shell, and the atomization exhaust port is communicated with the sterilization space.

2. The plasma sterilization cabinet of claim 1, further comprising:

and the main heating module is used for drying the articles to be sterilized in the sterilizing space and decomposing ozone in the sterilizing space.

3. A plasma sterilization cabinet according to claim 2, wherein,

the main heating module and the plasma generating module operate simultaneously.

4. The plasma sterilization cabinet according to claim 1, wherein,

a baffle is arranged below the fan.

5. The plasma sterilization cabinet according to claim 1, wherein,

the flow rate of the gas output by the gas flow module is 0.8L/min-5L/min.

6. The plasma sterilization cabinet according to claim 1, wherein,

the air inlet is communicated with an air inlet conduit, and the air inlet conduit is communicated with the sterilizing space or the outside atmosphere.

7. The plasma sterilization cabinet according to any one of claims 1 to 6, wherein,

the discharging assembly comprises a high-voltage electrode, a ground electrode and a dielectric layer, and the dielectric layer is arranged between the high-voltage electrode and the ground electrode;

the discharge power density of the discharge component is more than 0.17W/cm ² 。

8. A sterilization method of a sterilization cabinet, characterized in that the sterilization cabinet is a plasma sterilization cabinet according to any one of claims 1 to 7, the sterilization method comprising:

the plasma generation module comprises an initial discharge stage and a stable discharge stage;

when the plasma generation module is in the initial discharge stage, the air flow module is closed, the air inlet is closed, and the discharge assembly discharges to generate plasma;

when the plasma generating module is in the stable discharge stage, the air flow module is started, the air inlet is opened, plasma in the air chamber enters the sterilization space through the air flow module, and external air enters the air chamber through the air inlet;

and the atomization module inputs fog into the sterilization space.