KR20220138437A - Device for Negative Pressure having Function of Air Cleaning - Google Patents

Abstract

The present invention relates to a negative pressure device for maintaining a room at a negative pressure by discharging indoor air to the outside. According to the present invention, the negative pressure device comprises: a blower which sucks indoor air and applies discharge pressure; a disinfectant spraying device which atomizes and sprays a disinfectant in the air discharged by the discharge pressure of the blower; and a disinfectant activating mechanism having a material on its surface that promotes the activity of the disinfectant through which the air sprayed with the disinfectant sprayed from the disinfectant spraying device passes and comes into contact with it. The disinfectant activating mechanism is configured such that the air sprayed with the disinfectant passes through pores of a metal mesh in which a metal wire coated with a material for promoting disinfectant activity is woven.

Description

Device for Negative Pressure having Function of Air Cleaning

The present invention relates to a negative pressure device, and more particularly, to a negative pressure device having a function of purifying the air discharged to the outside from containing contaminants while discharging air from the room to the outside so that the room is maintained at a negative pressure.

In the case of respiratory diseases in which viruses or bacteria are transmitted through the air exhaled by the patient, the patient is treated in isolation in a negative pressure room.

Since the air in the negative pressure room does not leak to the outside, it prevents the pathogens contained in the breathing of the patient admitted to the negative pressure room from spreading to other spaces in the hospital.

However, when an infectious disease spreads, there is often a shortage of negative pressure rooms, and the relatively mild symptoms make it difficult to accommodate patients who do not require treatment in the room and must be isolated in the negative pressure room.

In some cases, patients with relatively mild symptoms who do not require inpatient treatment are admitted to non-hospital facilities or other facilities, while patients with severe infectious diseases are treated at facilities other than hospitals due to the lack of negative pressure rooms.

In a facility accommodating an infectious disease patient or a house in which an infectious disease patient resides, in order to maintain the room in which the patient resides at negative pressure, a blower device that exhausts air from the inside to the outside and a sterilizer that sterilizes the exhausted air should be installed.

However, it is very difficult to provide and install a device for sterilizing the discharged air while maintaining the negative pressure indoors by discharging air from such a facility or house to the outside.

An air purifier having a function of trapping particles while blowing air and sterilizing bacteria has been proposed.

As an example of such an air purifier, Korean Patent Publication No. 10-1020516 (Document 1) discloses a 'high-pressure sterilization processing apparatus using low-temperature plasma'. The apparatus according to the invention of Document 1 removes particles by passing air sucked in by a fan through a filter, and applies low-temperature plasma to the air from which particles are removed to sterilize and discharge the air.

Using such an air purifier, it is possible to maintain the room in which the patient is accommodated at negative pressure and to purify the air discharged to the outside, but the low-temperature plasma has a very low sterilization effect on the air discharged at a high flow rate, and the cost of the low-temperature plasma generator is low. There is a problem that the installation cost is high because it is high.

Korean Patent Publication No. 10-0738260 (Document 2) discloses an invention entitled 'Air purifying device having sterilization, deodorization and removal of harmful substances'. In the invention of Document 2, a method of adsorbing bacteria is used by containing activated carbon that adsorbs bacteria in a filter to which air is applied. In particular, there is a problem in that the filter must be replaced after a certain period of use.

Therefore, in order to use such an air purifying device as a negative pressure device for maintaining a receiving place of an infectious disease patient at a negative pressure, it should have sufficient sterilization performance and a simple and inexpensive structure.

Document 1: Korean Patent Publication No. 10-1020516 Document 2: Korean Patent Publication No. 10-0738260

An object of the present invention is to provide a negative pressure device having a function of purifying the air discharged to the outside from containing contaminants while discharging air from the room to the outside so that the room is maintained at a negative pressure.

In particular, it is an object of the present invention to provide a negative pressure device having sufficient sterilization performance for discharged air while maintaining a negative pressure at a receiving place of an infectious disease patient.

The above-described problem to be solved by the present invention is achieved by the present invention regarding a negative pressure device for maintaining a negative pressure in the room by discharging the air in the room to the outside.

A sound pressure device according to one aspect of the present invention,

A blower that sucks in air in the room and applies exhaust pressure,

A disinfectant spraying device that atomizes and sprays the disinfectant into the air discharged by the exhaust pressure by the blower, and

Disinfectant activating device provided with a material on the surface of which the sterilant sprayed from the sterilant spray device is passed through and contacted by the sprayed air and promotes the activity of the sterilizing agent.

including,

The disinfectant activation mechanism is configured to pass the air sprayed with the disinfectant agent through the pores of the metal mesh woven with the metal wire coated with the disinfectant activation promoting material.

According to this configuration, the air discharged from the room to the outside by the blower contains the disinfectant atomized and passes through the pores of the metal mesh in the disinfectant activation mechanism, while the disinfectant contained in the air is coated on the metal wire forming the metal mesh. Activated by the substance, pathogens in the air are discharged in a sterilized state.

Therefore, since indoor air can be sterilized with a simple instrument and discharged to the outside, the negative pressure device according to the present invention can be installed in the living space of an infectious disease patient rather than a negative pressure ward equipped with a sterilization facility to achieve a patient accommodation space such as a negative pressure ward. have

As an additional feature of the present invention, in the negative pressure device of the present invention,

The disinfectant may be hydrogen peroxide or hypochlorous acid, and the metal mesh of the disinfectant active device may be made of a woven stainless steel wire, and the surface of the stainless steel wire may be coated with manganese oxide.

In this way, when the metal mesh is formed by weaving stainless steel wires, voids are formed widely between the woven wires, so that the air flow is smooth and the contact area between the air and the wire is widened.

In addition, hydrogen peroxide or hypochlorous acid, which is a disinfectant, is contained in the air in an atomized state and comes into contact with the surface of the wire, and the manganese oxide on the surface of the wire is used as a catalyst to discharge active oxygen to sterilize pathogens in the air.

As an embodiment of this additional feature, the stainless steel wire may be coated with particles of manganese dioxide deposited as manganese oxide after etching and cleaning.

The etched stainless steel wire has an enlarged surface area and facilitates deposition of manganese oxide due to the rough surface.

As a further feature of the present invention, in the negative pressure device of the present invention,

The metal mesh may be disposed on a plane parallel to a direction perpendicular to the flow direction of air, and a plurality of metal meshes may be stacked on each other and disposed in a frame constituting an air flow passage.

According to this configuration, since the surface of the wire forming the metal mesh in contact with air has a very large area and a small volume, the activity of the disinfectant in the air is promoted and the size of the device can be small.

1 is a perspective view of a negative pressure device according to an embodiment of the present invention.
Figure 2 is a front view of the state in which the front cover of the case is removed from the negative pressure device of the embodiment of the present invention.
3 is a photograph of the sterilant activation mechanism constituting the negative pressure device of the embodiment of the present invention.
4 is a photograph of the metal mesh of the disinfectant activation mechanism constituting the negative pressure device of the embodiment of the present invention.
5 is a photomicrograph of a stainless steel wire constituting the metal mesh of the sterilizing agent activation mechanism constituting the negative pressure device of the embodiment of the present invention before, after, and after the manganese dioxide coating.

Hereinafter, the configuration and operation of an embodiment of a negative pressure device according to the present invention will be described as detailed content for carrying out this invention with reference to the accompanying drawings.

1 and 2 are a perspective view and a front view showing the negative pressure device of this embodiment with the front cover of the case removed to show the schematic internal configuration.

In the negative pressure device of this embodiment, all components are built in one case 10 so that it can be easily transported and installed in a space where an infectious disease patient resides in a home or facility other than a hospital, and a carrying handle 11 is provided on the upper surface of the case. it will be installed

In the negative pressure device of this embodiment, the blower 20, the pre-filter 21, the HEPA filter 22, the spray space 23, and the disinfectant activation mechanism 50 are air They are arranged sequentially along the flow path.

On the lower side of the case, a disinfectant box 40 and a spray generator 30 in which the disinfectant is contained as a disinfectant spray mechanism are provided. A spray generator 30 for atomizing the disinfectant by applying ultrasonic vibration to the disinfectant is placed on the lower side of the disinfectant box 40, and the vibrator 31 of the spray generator 30 is inserted into the disinfectant box 40 and the bottom surface It is placed in a state of being immersed in a disinfectant.

The blower 10 sucks air from the room, and the sucked air is discharged from the disinfectant activation device 50 to the outside after particles are filtered inside the negative pressure device and pathogens are sterilized. The outlet of the disinfectant activating mechanism 50 is placed outdoors or connected to a duct connected to the outdoors, so that the air discharged from the disinfectant activating mechanism 50 is discharged to the outside in a state in which contaminants are removed.

In FIG. 2, the flow paths of air and disinfectant are indicated by arrows.

The air in the room is sucked by the blower 20 and passes through the pre-filter 21 .

The blower 20 is of a general configuration in which a fan is driven by a motor to flow air in one direction.

The pre-filter 21 is formed of a mesh having micropores made of polypropylene to filter relatively large dust with a particle diameter of 50 μm or more. Collects large particles from the air. The pre-filter may be composed of a non-woven fabric so that it can be easily replaced.

The HEPA filter 22 is formed by folding a nonwoven fabric having micropores in a zigzag manner to collect particles with a particle diameter of 0.3 μm or more, and is installed perpendicular to the air flow direction to collect fine particles, bacteria and Capture pathogens such as viruses.

Since the blower, the pre-filter and the HEPA filter are widely known, detailed descriptions thereof will be omitted. However, since those having various configurations are widely used, various blowers and filters can be used for filtration of particles and pathogens in the present invention.

The air passing through the HEPA filter 22 flows into the spray space 23 , passes through the spray space, and flows into the disinfectant activation device 50 .

The spray space 23 is simply formed as an empty space through which air flows, and a nozzle (not shown) through which the atomized disinfectant is introduced from the disinfectant box 40 placed on the lower side is arranged on the bottom. The disinfectant atomized in the disinfectant box 40 flows into the spray space 23 through the nozzle and is sprayed on the air that has passed through the HEPA filter 22 , and the atomized disinfectant is sprayed into the disinfectant activation mechanism 50 . do.

The disinfectant box 40 is filled with a liquid disinfectant.

In this embodiment, hypochlorous acid water is used as the disinfectant, and the disinfectant is atomized by the ultrasonic vibration applied by the vibrator 31 placed on the bottom of the disinfectant box 40 and is sprayed into the spray space 23 through the nozzle at the top.

The sprayed disinfectant is sprayed and mixed in the air introduced into the spray space 23 and is introduced into the disinfectant activation device 50 together with the air.

The configuration of the disinfectant activation mechanism 50 will be described with reference to FIGS. 3 and 4 .

The disinfectant activation mechanism 50 is composed of a plurality of metal meshes 51 having voids through which air flows, and a frame 52 that surrounds the metal meshes to fix the metal meshes.

The metal mesh 51 is a rectangular cut by weaving a stainless steel wire, and the air containing the atomized disinfectant passes through the voids formed between the woven wires and comes into contact with the surface of the wire.

A plurality of metal meshes 51 are stacked and placed between the rectangular frames 52 so that the inner space of the frame 52 becomes an air flow passage.

The wire is made of stainless steel with a diameter of 0.12 mm and is coated with manganese dioxide on the surface.

Since the stainless steel wire is not well coated with manganese dioxide due to its high corrosion resistance, it was first etched by immersion in a hydrofluoric acid solution and washed with water.

The etched and cleaned stainless steel wire was immersed in an aqueous solution of manganese acetate tetrahydrate, manganese acetate (Mn(CH3COO)2·4H2O) and urea so that manganese dioxide was deposited and coated on the surface.

Figure 5 (a) is a photograph of a stainless steel wire, (b) is a photograph showing the wire surface is etched, (c) is a photograph showing a state in which the manganese dioxide is coated.

The manganese dioxide coated wire was woven in the form shown in FIG. 4 . In the weaving, 12 wires were twisted and woven so that the ratio of the voids used as the air flow path was 0.95.

On the other hand, in this embodiment, the metal mesh 51 is formed by weaving after etching the stainless steel wire and coating the manganese dioxide. After the mesh is formed, the metal mesh may be etched and coated with manganese oxide.

In the passage through which the air flows in the disinfectant activation mechanism 50, since these metal meshes 51 are arranged in multiple layers, the air passing through the pores of the metal mesh comes into contact with the surface of the wire constituting the metal mesh and is atomized. Hypochlorous acid contained in the air reacts with manganese dioxide on the surface of the metal mesh as a catalyst to generate active oxygen.

The active oxygen thus formed has a sterilizing action on pathogens that have passed through the filters 21 and 22 .

On the other hand, although hypochlorous acid is used as the disinfectant in this embodiment, hydrogen peroxide can be used as the disinfectant, and other metal oxides other than manganese dioxide are coated on the metal mesh 51 constituting the disinfectant activation mechanism 50. It can also be used as a catalyst.

10: case 20: blower
21: pre-filter 22: hepa filter
23: spray space 30: spray generator
40: disinfectant box 50: disinfectant activation device

Claims (6)

A negative pressure device for maintaining a room at negative pressure by discharging air from the room to the outside, comprising:
A blower that sucks in air in the room and applies exhaust pressure,
A disinfectant spraying device that atomizes and sprays the disinfectant into the air discharged by the exhaust pressure by the blower, and
Disinfectant activating device provided with a material on the surface of which the sterilant sprayed from the sterilant spray device is passed through and contacted by the sprayed air and promotes the activity of the sterilizing agent.
including,
The sterilizing agent activating mechanism is a negative pressure device, wherein the sterilizing agent is configured to pass through the pores of the metal mesh woven with a metal wire coated with a sterilizing agent activity promoting material. The method according to claim 1,
The sterilizing agent is hydrogen peroxide or hypochlorous acid, the metal mesh of the sterilizing agent activating device is made of a woven stainless steel wire, and the surface of the stainless steel wire is coated with manganese oxide. 3. The method according to claim 2,
The negative pressure device, wherein the stainless steel wire is coated by depositing particles of manganese dioxide as manganese oxide after etching and cleaning. The method according to claim 1,
The metal mesh is disposed on a plane parallel to the direction perpendicular to the flow direction of the air, and a plurality of metal meshes are stacked on each other and disposed in a frame constituting an air flow passage, a negative pressure device. The method according to claim 1,
The sterilizing agent spraying mechanism is equipped with an ultrasonic vibrator immersed in the sterilizing agent to atomize the sterilizing agent by ultrasonic vibration, a negative pressure device. 6. The method according to any one of claims 1 to 5,
A filter mechanism for filtering particles from the air sucked by the blowing mechanism is further provided,
A negative pressure device, wherein the blowing mechanism, the filter mechanism, the space to which the disinfectant sprayed by the disinfectant spray mechanism is applied, and the disinfectant activating mechanism are sequentially arranged in the flow direction of the air.

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