阅读说明：本技术 一种低温等离子体口罩灭菌修复驻极机及方法 (Low-temperature plasma mask sterilization repair electret machine and method ) 是由 万京林 戴阳 徐龙 卞超 万良淏 于 2020-04-20 设计创作，主要内容包括：本发明公开了一种低温等离子体口罩灭菌修复驻极机及方法,属于医用口罩灭菌修复技术领域。本发明包括壳体,壳体内设置有电源、吹风装置、等离子体驻极装置和口罩固定装置,口罩固定装置位于介质阻挡放电装置的上部,利用等离子体驻极装置产生的电场处理待处理口罩表面,可提高口罩荷电吸附能力,对无纺布材料进行驻极处理,同时电场中产生的等离子体活性粒子很快被材料吸附,被吸附后能持续起到灭菌作用,且口罩无异味,本发明可对短期使用过的口罩进行高效杀菌消毒再生,缓解口罩供应紧张,减少污染,同时实现小型少量口罩快速便携处理。(The invention discloses a low-temperature plasma electret for sterilizing and repairing a mask and a method thereof, belonging to the technical field of sterilizing and repairing of medical masks. The invention comprises a shell, wherein a power supply, a blowing device, a plasma electret device and a mask fixing device are arranged in the shell, the mask fixing device is positioned at the upper part of a dielectric barrier discharge device, the surface of a mask to be treated is treated by utilizing an electric field generated by the plasma electret device, the charged adsorption capacity of the mask can be improved, the electret treatment is carried out on a non-woven fabric material, simultaneously, plasma active particles generated in the electric field are quickly adsorbed by the material, and can continuously play a role of sterilization after being adsorbed, and the mask has no peculiar smell.)

1. The utility model provides a low temperature plasma gauze mask sterilization restores electret, includes the casing, its characterized in that: the mask comprises a shell, a power supply, a plasma electret device and a mask fixing device, wherein the shell is internally provided with the power supply, the plasma electret device is used for supplying power to the plasma electret device, the plasma electret device is connected with a high-voltage end of the power supply, and the shell is grounded with a low-voltage end of the power supply; the mask fixing device is positioned on the upper part of the plasma electret device and is positioned in an electric field generated by the discharge of the plasma electret device.

2. The low-temperature plasma mask sterilization repair electret machine according to claim 1, wherein: the plasma electret device is a plasma electrode wire array, the plasma electrode wire array comprises a plurality of electrode wires, the electrode wires are distributed at equal intervals, and the high-voltage end of the power supply is connected with the electrode wires.

3. The low-temperature plasma mask sterilization repair electret machine according to claim 2, wherein: two ends of the electrode wire are arranged on the shell through the insulating part; the plasma electrode wire array further comprises a plurality of electrode balls, and two ends of the electrode wire are connected with the insulating part through the electrode balls.

4. The low-temperature plasma mask sterilization repair electret machine according to claim 3, wherein: the electrode wire is made of titanium wires, and/or the electrode ball is made of stainless steel, and/or the insulating part is made of PP or PTFE.

5. The low-temperature plasma mask sterilization repair electret machine according to claim 1, wherein: the power supply is a negative bias alternating current power supply, the power supply frequency is 8-12kHZ, the power supply voltage is- (12-16) kV, and the power of the power supply is not higher than 100W.

6. The low-temperature plasma mask sterilization repair electret according to any one of claims 1 to 5, wherein: the heating device heats the airflow of the blowing device.

7. The low-temperature plasma mask sterilization repair electret machine according to claim 6, wherein: the blowing device is a fan, the heating device is a heating resistor, and the fan is arranged above the heating resistor; the heating temperature of the heating resistor during working is 50-80 ℃.

8. The low-temperature plasma mask sterilization repair electret machine according to claim 1, wherein: gauze mask fixing device is gauze mask anchor clamps, still include the anchor clamps backup pad that the level set up in the casing, gauze mask anchor clamps are placed on the anchor clamps backup pad, gauze mask anchor clamps include the guide arm that four levels set up, the guide arm is fixed on the mounting panel, and the guide arm forms the tetragonal body structure with the mounting panel, four respectively be provided with a plurality of couples on the guide arm, the couple can be followed the guide arm slides.

9. A low-temperature plasma mask sterilization and electret repairing method is characterized in that: mounting a mask to be treated on a mask clamp, keeping the mask in the mask clamp horizontally placed above the plasma electrode wire array, and enabling the mask to be close to the plasma electrode wire array; the plasma electrode wire array is connected with a power supply, the mask to be treated clamped by the mask clamp is positioned in an electric field generated by the plasma electrode wire array, the mask to be treated is electret, and meanwhile, the plasma generated by the electric field sterilizes the mask to be treated.

10. The low-temperature plasma mask sterilization repair electret method of claim 9, wherein: the power supply is a negative bias alternating current power supply; or the air flow is heated by a heating resistor and is driven by a fan; and after electret treatment, the power supply and the heating resistor are closed, and the fan drives cold air to cool the mask to be treated.

Technical Field

The invention relates to the field of sterilization and repair of medical masks, in particular to a low-temperature plasma mask sterilization and repair electret machine and a method.

Background

In order to ensure effective resistance to novel coronavirus, people have more and more demands on medical masks, and in order to relieve mask supply pressure, the masks used in a short period need to be efficiently sterilized, disinfected and regenerated, so that mask supply tension is relieved, and potential harm of a large amount of waste masks to public environment and public health is reduced.

For the sterilization treatment of the mask, although the traditional chemical method has long time, toxic chemical residues exist, the secondary use is not facilitated, and the process can generate secondary pollution to the environment. Although the physical method adopting ultraviolet irradiation does not cause secondary pollution, the ultraviolet penetration capability is poor, the treatment time is long, the efficiency is low, if the treatment is not sufficient, the bacterial virus variation can be caused, and more serious pathogenicity can appear; the product is preserved aseptically after leaving the treatment area, and has poor timeliness which is the same as that of the product which is not killed quickly. In order to meet the isolation requirement and prevent poor infection, a plurality of masks are not suitable for large-scale treatment, and a small number of small masks are needed to be quickly and conveniently treated. Most of the materials of the medical mask have no sterilization effect, so how to properly enhance the filtering effect on the original basis, increase the sterilization capability and improve the additional value of the mask also has practical value, and no special equipment for specially processing the sterilization of the mask exists at present. Meanwhile, the latest research published in the lancet shows that the new coronavirus can survive for at least 7 days on the outer surface of the medical surgical mask, and the sterilization of the mask in the recycling process is more important.

The low temperature plasma contains charged particles, energetic electrons, and electrically neutral reactive particles such as radicals, excited atoms, and molecules. The plasma is generated by high-voltage discharge, and along with complex physical and chemical effects, the plasma shows rapid and efficient sterilization capability when acting with microorganisms, and meanwhile, active particles in the plasma are quickly adsorbed by materials after contacting with substances and stay on the materials to continuously play a sterilization role after adsorption, so that the plasma is the most promising sterilization and disinfection technology at present, and has wide application prospects in the fields of environment, biology, medical treatment and the like.

The Chinese invention patent (application number: CN201910814668.2, application date: 2019, 8 and 30) discloses a glow discharge plasma surface treatment method and a glow discharge plasma surface treatment device, and in order to construct a thin-wire contact electrode, the method can directly take carbon fiber fabrics as a part of the electrode to participate in discharge reaction and particle exchange. And cannot be used for the treatment of nonwoven materials, meltblown nonwovens are very thin and are also temperature sensitive, damaging the perforations once they are pressed against the electrode.

The mask is made of non-uniform materials, contains a large amount of moisture, is complex in shape, is not suitable for being directly treated by atmospheric pressure low-temperature plasma, and can convey high-activity plasma particles in an air flow manner to penetrate through the mask for sterilization and disinfection; on the other hand, the used mask is often high in humidity, air resistance is increased, residual peculiar smell is remained, and proper drying and desorption treatment is needed; the mask is large, the discharge area of the normal pressure plasma is usually small, and the uniformity of particle flow is difficult to ensure.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention aims to overcome the defects in the prior art and provides a low-temperature plasma mask sterilization repair electret and a method thereof.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the invention discloses a low-temperature plasma mask sterilization repair electret, which comprises a shell, wherein a power supply, a plasma electret device and a mask fixing device are arranged in the shell, the power supply is used for supplying power to the plasma electret device, the plasma electret device is connected with a high-voltage end of the power supply, a low-voltage end of the power supply is grounded with the shell, and the mask fixing device is positioned at the upper part of the plasma electret device and is positioned in an electric field generated by the plasma electret device and the shell. The electric field performs electret treatment on the mask to be treated in the mask fixing device, and active particles generated by the electric field are quickly adsorbed by the material and can continuously play a role in sterilization after being adsorbed.

As a further improvement of the invention, the plasma electret device is a plasma electrode wire array which comprises a plurality of electrode wires which are distributed at equal intervals, and the high-voltage end of the power supply is connected with the electrode wires through an insulated high-voltage lead. The electrode wires distributed at equal intervals are beneficial to promoting the uniform distribution of plasma space.

As a further improvement of the invention, two ends of the plasma electrode wire array are fixed with the shell through the insulating parts; the plasma electrode wire array further comprises an electrode ball, and the electrode wire and the insulating part are fixed through the electrode ball. The electrode balls disperse the electric field, and damage to the insulating part is avoided.

As a further improvement of the invention, the electrode wire is made of titanium wire, and/or the electrode ball is made of stainless steel, and/or the insulating part is made of PP or PTFE.

As a further improvement of the invention, the power supply is a negatively biased AC power supply with a supply voltage of 8-12kV, and/or with a supply voltage of- (12-16) kV, and/or with a power of not more than 100W. The alternating current discharge is beneficial to generating plasma near the electrode wire, the negative bias is beneficial to generating negative ions, the high-energy electron emission is promoted, and the electron penetrating power is improved.

As a further improvement, the air-conditioning system further comprises an air blowing device and a heating device, wherein the heating device heats the air flow of the air blowing device. The air flow heating generates a thermal environment for discharging, the power required by discharging can be reduced, and the hot air also plays a drying role in the upper mask area.

As a further improvement of the invention, the blowing device is a fan, the heating device is a heating resistor, the fan and the heating resistor are integrated into a module, namely the fan is fixed on the heating resistor and drives the air flow heated by the heating resistor; the heating temperature of the heating resistor is 50-80 ℃ when the heating resistor works, and/or the fan is made of metal.

As a further improvement of the invention, the mask fixing device is a mask clamp, the shell is also internally provided with a horizontally arranged clamp supporting plate, the mask clamp is arranged on the clamp supporting plate and can be replaced, the mask clamp comprises 2 horizontally arranged guide rods, the guide rods are fixed on the mounting plate, a plurality of hooks are respectively arranged on the 2 guide rods, the hooks can slide along the guide rods, the mask to be treated is stretched on the hooks through a belt of the mask to be treated so as to be fixed on the mask clamp, the relative position of each mask can be uniformly adjusted after the mask is hung, and a spare mask clamp can be arranged according to requirements.

The invention relates to a sterilization and repair electret method for a low-temperature plasma mask, which is characterized in that a mask to be treated is arranged on a mask clamp, the mask in the mask clamp is kept to be vertically placed above a plasma electrode wire array and is close to the plasma electrode wire array; performing electret treatment, connecting the plasma electrode wire array with the high-voltage end of a power supply, grounding the shell and the low-voltage end of the power supply, and electret the mask to be treated in an electric field.

As a further improvement of the invention, the power supply is a negative bias alternating current power supply; or the air flow is heated by the heating resistor and driven by the fan to carry out electret treatment, the power supply and the heating resistor are turned off after the electret treatment, and the fan drives cold air to cool the mask to be treated, so that the electret can be stabilized.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

(1) according to the invention, the blowing device and the plasma electret device are arranged, the electric field generated by the plasma electret device is utilized to treat the surface of the mask to be treated, the charged adsorption capacity of the mask can be improved, the electret treatment is carried out on the non-woven fabric material, meanwhile, the plasma active particles generated in the electric field are quickly adsorbed by the material, the sterilization effect can be continuously achieved after the adsorption, and the mask has no peculiar smell; the invention can realize the quick and portable treatment of small-sized masks.

(2) The invention forms an asymmetric field power supply by adopting the alternating current power supply with negative bias, and the negative bias is favorable for generating negative ions, thereby having the effects of promoting high-energy electron emission and improving the penetrating power of electrons, and further obtaining better electret effect.

(3) According to the invention, the heating device is arranged, the air flow heating generates a heat environment for discharging, the power required by discharging can be reduced, and the hot air also plays a drying role in the upper mask area, so that sterilization, repair and electret treatment can be carried out on the mask while drying is carried out.

(4) According to the plasma electrode wire array, the plasma electrode wire array comprises the plurality of electrode wires which are distributed at equal intervals, so that negative ions generated by plasma discharge of the electrode wires are promoted to be uniformly distributed in space, and meanwhile, the electrode balls are arranged between the electrode wires and the insulating part and can disperse an electric field, so that the insulating part is prevented from being damaged by point discharge, and the durability and reliability of equipment are improved.

(5) By arranging the replaceable mask clamp, on one hand, the mask clamp can be replaced properly according to different masks, such as ear wearing type or head wearing type; on the other hand, one mask can be used for preparing the other mask, the mask on the other mask clamp is installed when one mask clamp is used for processing, the mask clamp is directly replaced when the mask clamp is replaced, the downtime is effectively reduced, and the processing efficiency is improved.

(6) According to the invention, the fan drives the heating airflow to be heated by the heating resistor, so that the electret treatment is carried out, the power supply and the heating resistor are turned off after the electret treatment, and the fan drives the cold air to cool the mask to be treated, so that the electret effect is stabilized, the long-time electrified electret is favorably formed, and the filtering effect of the mask is enhanced.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a perspective view of the present invention;

fig. 3 is a top view of the mask holder of the present invention;

FIG. 4 is a schematic view of a plasma electrode wire array discharge device according to the present invention;

FIG. 5 is a perspective view of the present invention;

FIG. 6 is a waveform of the AC positive pulse voltage of the power supply of the present invention;

FIG. 7 is a waveform of the AC negative pulse voltage of the power supply of the present invention;

fig. 8 is a schematic diagram of the present invention.

The reference numerals in the schematic drawings illustrate: 100. a housing; 110. a top wall; 120. a heat dissipation grid; 130. a control panel; 200. a power source; 210. a high voltage transformer; 220. an auxiliary transformer; 230. a transformer radiator; 310. a fan; 320. a heating resistor; 400. a plasma electret device; 410. a plasma wire electrode array; 411. a wire electrode; 412. an insulating section; 413. an electrode ball; 414. a connecting portion; 500. a mask fixing device; 510. a mask clamp; 520. a jig support plate; 600. the mask to be treated.

Detailed Description

For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

The present invention will be further described with reference to the following examples.