KR102580879B1 - Low Noise Negative Pressure Machine - Google Patents

Abstract

The present invention is a negative pressure machine that prevents internal contaminated air and bacteria from leaking out by making the indoor air pressure lower than that of the outside. More specifically, it uses a fan that generates suction force by opening the housing divided into the upper body and the lower body. It can be demounted and reused after a cleaning process, and relates to a low-noise negative pressure device that reduces fan noise and emits it to the outside of the housing.

Description

Low Noise Negative Pressure Machine}

The present invention is a negative pressure machine that prevents internal contaminated air and bacteria from leaking out by making the indoor air pressure lower than that of the outside. More specifically, it is a fan that generates suction force by easily opening the housing divided into the upper body and the lower body. It can be reused after dismounting and cleaning, and relates to a low-noise negative pressure device that emits the noise outside the housing after the fan noise is reduced.

Recently, due to the problem of air pollution, the occurrence of various pathogens such as pneumonia virus, and infectious viruses, and the rapid increase in the number of allergy sufferers, microorganisms such as bacteria, fungi, and viruses, and harmful chemicals, etc., are removed from the air. A technology has been proposed.

In particular, medical institutions have the possibility of spreading or cross-infecting medical staff or other patients by spreading various viruses or pathogens originating from patients with specific diseases through the indoor air of the medical institution. It prevents microorganisms such as bacteria, fungi, and viruses from spreading outside.

The isolation space provided in a medical institution is called a negative pressure room. The negative pressure room is a space that controls the flow of air using differences in air pressure, and this difference in air pressure is implemented through a separate negative pressure machine. In other words, air has the characteristic of moving from high pressure to low pressure, and the negative pressure machine uses this characteristic of air to make the pressure inside the hospital room lower than the outside, preventing microorganisms such as bacteria, fungi, and viruses in the hospital room from leaking out. Do not allow it. Accordingly, the negative pressure room is used as a space to isolate and treat patients with contagious diseases.

Recently, COVID-19, which causes pneumonia symptoms that originated in Wuhan, China, has spread throughout the world, causing delta and omiclone mutations, and mutating into a more contagious virus.

In order to block the rapidly spreading COVID-19 epidemic at an early stage, the government of each country isolates infected people in negative pressure rooms to prevent the virus from spreading outside of society, thereby ensuring the safety of medical volunteers who provide medical services to infected people and preventing the spread of infection. We are making every effort to defeat the power.

Due to the rapid spread of the COVID-19 virus, the demand for negative pressure rooms has increased rapidly, and the demand for negative pressure machines that maintain the negative pressure in negative pressure rooms has also increased rapidly.

Looking at a conventional negative pressure machine, as described in <Negative pressure machine with air purification function> in Republic of Korea Patent Publication No. 10-2362241, it includes a housing that forms the exterior of the product; a pre-stage filter unit mounted on the air inlet side of the housing; a blowing fan for forcibly blowing air through the previous filter unit; It includes a discharge guide duct for guiding the discharge of air moving toward the discharge side by the blower fan.

Through this structure, the indoor air pressure is created as negative pressure, allowing the air flow to move from the outdoors to the indoors, preventing viruses from leaking outdoors and purifying them through a filter.

However, conventional negative pressure machines are expensive, and looking at the actual use of negative pressure machines, we find that rather than purchasing and using negative pressure machines individually, they are rented from a rental company and placed in the negative pressure room, and after the infected person recovers, the negative pressure machine in the negative pressure room where the infected person was isolated is discarded. By disposing, the virus remaining in the negative pressure chamber was removed.

This rental method causes great economic loss as the use of the negative pressure machine is limited to one infected person, so the rental company must bear the burden.

Therefore, this leads to an increase in the cost of negative pressure devices, and in emergency situations where negative pressure isolation rooms must be quickly expanded due to a rapid increase in patients, such as in the current coronavirus outbreak, the government's budget shortage and the negative pressure room management system make it difficult to immediately isolate the rapidly increasing number of infected people. It was difficult to respond.

In addition, in the case of the conventional negative pressure machine, in order to provide a virus and bacterial contamination prevention system, it could be applied only to places equipped with air conditioning facilities that serve as passageways for air to move, such as inlet pipes and discharge pipes. This led to the problem of high facility investment costs during the construction process.

Accordingly, in the era of the spread of large-scale contagious viruses such as COVID-19, in order to establish an immediate response system and enable negative pressure devices to be widely distributed, it is necessary to develop negative pressure devices with improved productivity so that the general public can purchase them at a minimum cost. am.

KR 10-2362241 (B1) 2022.02.08. KR 10-2011-0086942 (A) 2011.08.02.

In order to solve the above problems, the purpose of the present invention is to separate the housing forming the outer surface of the negative pressure machine into an upper body and a lower body so that the inside of the housing can be easily opened, and the fan and shear filter provided inside the housing can be easily mounted and removed. , to provide a low-noise negative pressure machine that improves noise suppression and increases adhesion between the housing and the discharge membrane by using an insulating material as a housing.

Another object of the present invention is to install a fan, filter, and discharge membrane by inserting between two separate upper and lower bodies, and to provide low-noise sound pressure that is simple to join and improves sealing ability through a taping joint method without using bolts or nuts. It is to provide energy.

Another object of the present invention is to provide a low-noise negative pressure machine with a structure optimized for negative pressure machine rental service by separating and combining discarded parts such as filters and discharge membranes and a sturdy, reusable fan.

Another object of the present invention is to minimize the spread of infectious diseases that may occur when reusing used negative pressure machines by disposing of the remaining products such as housings, filters, and discharge membranes exposed to flowing air, excluding fans that require robustness, and to minimize the spread of infectious diseases to users. The goal is to provide a low-noise negative pressure device that reduces rejection.

Another object of the present invention is that when the upper body and the lower body are coupled, the coupling protrusion is inserted into the coupling groove to form a soundproof wall with a step at the joint of the upper body and the lower body, so that the upper body and the lower body are firmly coupled at the same time. The aim is to provide a low-noise negative pressure machine in which fan noise can be reduced by a soundproof wall.

Another object of the present invention is that a sound-absorbing material is surrounded and disposed along the outer peripheral surface of the fan, and the front and rear filters are fixed in close contact with the inner surfaces of the upper and lower bodies on the front and rear sides of the fan, respectively, so that the noise of the fan is reduced through the filter. It is emitted through a filter and reduced by a filter, providing a low-noise sound pressure generator with excellent quietness.

Another object of the present invention is that the fan receiving groove and the shear receiving groove formed on the inner surface of the housing are spaced apart from each other, so that the fan inserted into the fan receiving groove and the shear filter inserted into the shear receiving groove do not contact, so that the fan receiving groove and the shear receiving groove formed on the inner surface of the housing are spaced apart from each other. It provides a low-noise negative pressure machine that improves the purification efficiency of the front-end filter by allowing air to pass through the entire area of the front-end filter and then be sucked into the fan.

The present invention to achieve the above object is a negative pressure machine that maintains the indoor air pressure in a negative pressure state lower than that of the outside, the interior of which is hollow, and an inflow opening 116 for sucking indoor air is formed on the front, and the suction An outlet 117 that discharges air to the outside is formed at the rear end, and is provided separately into an upper body 110 and a lower body 120, and either the upper body 110 or the lower body 120 is used. A housing (100) that opens to open the hollow interior, but whose shape is variable due to external force; A sealing film 130 that is provided along the seam of the upper body 110 and the lower body 120 and is arranged at a certain width up and down at the seam to secure the upper body 110 and the lower body 120 from the outer surface. ; A fan 300 provided in the center of the housing 100 and forming an air flow from the inlet opening 116 to the outlet 117; A front end filter 200 inserted into the housing 100, the outer peripheral surface of which is in close contact with the upper body 110 and the lower body 120, and disposed between the fan 300 and the inlet opening 116; and a discharge film 500 that is fitted inside the discharge portion 117 and is in close contact with the inner surface of the discharge portion 117 by inserting an internal fixing ring 510, which is a hard ring, therein. The discharge portion 117 of (100) has a variable shape due to external force, and the discharge portion 117 is provided with an external fixing ring 520 surrounding the discharge portion 117. The discharge film 500 is disposed between the inner periphery of and the internal fixing ring 510, and the discharge portion 117 is pressurized by the external fixing ring 520 to fix the discharge film 500.

In addition, a rear-end filter 400 whose outer peripheral surface is surrounded by the upper body 110 and the lower body 120 is provided between the discharge unit 117 and the fan 300 of the present invention, and the discharge membrane 500 ) reduces the noise emitted.

In addition, a coupling protrusion 111 and a coupling groove 111a are formed at the joint of the upper body 110 and the lower body 120 of the present invention and engage with each other, and the coupling protrusion 111 is in the coupling groove 111a. As it is inserted, a stepped soundproof wall is formed at the joint between the upper body 110 and the lower body 120.

In addition, the housing 100 of the present invention includes a curved fan receiving groove 114 in which the fan 300 is accommodated; and a front end receiving groove 112 spaced forward of the fan receiving groove 114 and receiving the front end filter 200. A fan 300 and the front end receiving the fan receiving groove 114 are formed. The front end filter 200 accommodated in the receiving groove 112 is arranged to be spaced apart in the air flow direction, and the fan 300 and the fan receiving groove 114 are arranged to be spaced apart at a certain distance in the radial direction.

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In addition, a sound-absorbing material 340 surrounding the fan 300 of the present invention is disposed in a space spaced apart between the fan 300 and the fan receiving groove 114.

In addition, in the present invention, a mounting protrusion 118 and a mounting groove 530 are formed in the circumferential direction at a joint between the obliquely formed discharge portion 117 and the housing 100 to engage with each other, and the discharge portion 117 rotates. While doing so, the direction of air discharge changes.

The low-noise negative pressure machine according to the present invention separates the housing forming the outer surface of the negative pressure machine into an upper body and a lower body, so that the inside of the housing can be easily opened, the fan and shear filter provided inside the housing can be easily installed and removed, and the insulation material is added to the housing. It has the advantage of improving noise suppression and increasing the adhesion between the housing and the discharge membrane.

In addition, the present invention has the advantage of mounting a fan, filter, and discharge membrane by inserting them between two separate upper and lower bodies, and simplifying the connection and improving sealing power by using a taping joint method without using bolts or nuts.

In addition, the present invention has the advantage of having a structure optimized for negative pressure machine rental service by separately combining discarded parts such as filters and exhaust membranes and a sturdy, reusable fan.

In addition, the present invention minimizes the spread of infectious diseases that may occur when reusing a used negative pressure machine by disposing of the remaining products such as housing, filters, and discharge membranes exposed to flowing air, excluding fans that require robustness, and reduces user resistance. There is an advantage in reducing it.

In addition, in the present invention, when the upper body and the lower body are coupled, the coupling protrusion is inserted into the coupling groove to form a soundproof wall with a step formed at the joint of the upper body and the lower body, so that the upper body and the lower body are firmly coupled and at the same time, the soundproof wall is formed. This has the advantage of reducing fan noise.

In addition, in the present invention, a sound-absorbing material is surrounded and disposed along the outer peripheral surface of the fan, and the front and rear filters are fixed in close contact with the inner surfaces of the upper and lower bodies, respectively, at the front and rear of the fan, so the noise of the fan is emitted only through the filter. This has the advantage of being quiet as it is reduced by the filter.

In addition, in the present invention, the fan receiving groove and the shear receiving groove formed on the inner surface of the housing are spaced apart from each other, so that the fan inserted into the fan receiving groove and the shear filter inserted into the shear receiving groove do not contact, so that the air flowing into the housing It has the advantage of improving the purification efficiency of the front-end filter because it can be sucked into the fan after passing through the entire area of the front-end filter.

Figure 1 is an overall perspective view of the low-noise negative pressure machine of the present invention.
Figure 2 is an exploded perspective view of the low-noise negative pressure machine of the present invention.
Figure 3 is a vertical cross-sectional perspective view showing the inside of a housing according to the low-noise negative pressure machine of the present invention.
Figure 4 is a vertical cross-sectional perspective view of the front-end filter and the rear-end filter according to the low-noise negative pressure generator of the present invention mounted inside the housing.
Figure 5 is a perspective view of a state in which the fan according to the low-noise negative pressure machine of the present invention is mounted inside the housing and the upper body is not shown.
Figure 6 is a perspective view of the front-end filter, rear-end filter and fan according to the low-noise negative pressure machine of the present invention mounted inside the housing and not showing the upper body.
Figure 7 shows an inclined state of the discharge portion according to another embodiment of the low-noise negative pressure machine of the present invention, (a) is an overall perspective view, and (b) is a longitudinal cross-sectional view.
Figure 8 is an exploded perspective view of a housing according to another embodiment of the low-noise negative pressure device of the present invention, divided into front and rear ends, and a discharge portion formed on one side of the housing.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those skilled in the art can easily implement them.

In the present invention, the front refers to the direction in which air flows into the housing 100, and the rear refers to the direction in which air introduced into the housing 100 is discharged to the outside.

As shown in Figures 1 to 8, the low-noise negative pressure machine according to the present invention is a negative pressure machine that prevents internal polluted air and bacteria from leaking out to the outside by making the indoor air pressure lower than that of the outside.

The interior is hollow, and an inlet opening 116 for sucking in indoor air is formed at the front, and a discharge portion 117 for discharging the sucked air to the outside is formed at the rear end, and the upper body 110 and the lower body A housing 100 provided with a body 120 and opening either the upper body 110 or the lower body 120 to open the hollow interior;

A sealing film 130 disposed along the joint between the upper body 110 and the lower body 120 to seal the inside of the housing 100;

A fan 300 provided in the center of the housing 100, sucks indoor air and creates an air flow from the inlet opening 116 to the outlet 117;

A front end filter 200 inserted into the housing 100, the outer peripheral surface of which is in close contact with the upper body 110 and the lower body 120, and disposed between the fan 300 and the inlet opening 116; and

It includes a discharge film 500 that is inserted into the discharge portion 117 and guides the air introduced into the housing 100 to the outdoors.

The low-noise negative pressure device according to the present invention makes the indoor air pressure of the negative pressure room where the infected person is isolated lower than the outside, allowing air flow from the outdoors into the room, and preventing the air from flowing from the indoor to the outdoors to prevent viruses and bacteria present in the negative pressure room. It is a negative pressure machine that does not leak the light to the outdoors.

The negative pressure device of the present invention is placed inside the negative pressure room, sucks in indoor air, purifies it through a filter, and then discharges the sucked air through the discharge part 117 connected to the outside of the negative pressure room. By continuously sucking in the air inside the negative pressure room and discharging it to the outside, the air pressure in the negative pressure room equipped with a negative pressure machine is lowered, thereby achieving negative pressure.

The negative pressure machine consists of a housing 100 that forms the exterior separated into an upper body 110 and a lower body 120, the joints are sealed with a sealing film 130, and a fan forms an air flow in the central part of the housing 100. 300 is placed. A front-end filter 200 and a back-end filter 400 are disposed in front and behind the fan 300, respectively, to purify the intake air and reduce the noise of the fan 300.

The fan 300 is operated to suck indoor air through the inlet opening 116 at the front of the housing 100, and the discharge portion 117 communicates with the outside through the front filter 200 and the rear filter 400. It is discharged to the outside of the housing 100 through.

The housing 100 of the negative pressure machine of the present invention is configured to be separated into an upper body 110 and a lower body 120, so the interior of the housing 100 can be easily opened, and the front end disposed inside the housing 100 The filter 200, rear filter 400, and fan 300 can be inspected and purification work can be easily performed.

When reusing the negative pressure machine, the front filter 200 and the rear filter 400 are replaced with clean ones, and the fan 300 can be reused by being reinstalled inside the housing 100 after undergoing disinfection and maintenance.

When the upper body 110 and the lower body 120 are coupled, the coupling protrusion 111 is inserted into the coupling groove 111a, so that a soundproof wall is formed at the joint between the upper body 110 and the lower body 120. Therefore, the noise of the fan 300 provided inside the housing 100 is reduced when it hits the soundproof wall.

In addition, a front-end filter 200 and a back-end filter 400 are disposed at the front and rear ends of the fan 300, respectively, and the front-end filter 200 and the back-end filter 400 are connected to the upper body 110 and the lower body 120. Due to the close contact, the noise of the fan 300 passes only through the front-end filter 200 and the back-end filter 400, and the intensity is reduced.

Therefore, the negative pressure machine of the present invention not only facilitates maintenance work because the components inside the housing 100 can be easily mounted and removed, but also has excellent quietness because the noise of the fan 300 is reduced and emitted to the outside of the housing 100.

As shown in Figures 1 to 3, the low-noise sound pressure device according to the present invention is provided with a housing 100 that forms the exterior. The housing 100 has a hollow interior, and is equipped with a front-end filter 200, a back-end filter 400, and a fan 300, which will be described later.

The housing 100 may be made of expanded styrene resin (brand name: Styrofoam), which has the advantage of soundproofing the noise generated by the fan 300 and being economically inexpensive. This expanded styrene resin has the characteristic of changing its appearance with a small amount of pressure. The present invention uses this inexpensive and pressurized characteristic to reduce noise and increase sealing power.

At the front of the housing 100, an inlet opening 116 is formed that is open and allows air from outside the housing 100 to flow in, and at the rear is an outlet 117 through which air introduced into the housing 100 is discharged to the outside. ) is formed.

The inlet opening 116 is a surface through which external air is sucked due to the operation of the fan 300, and is formed with a large area on the front of the housing 100 to improve suction efficiency.

The discharge portion 117 is formed by protruding from the rear end of the housing 100, and is formed by combining an upper body 110 and a lower body 120, which will be described later. In the drawing according to an embodiment of the present invention, the discharge portion 117 is formed as disposed at the rear end of the housing 100, but the discharge portion 117 is not limited to this, and as shown in FIG. 8, the discharge portion 117 is disposed at the rear end of the housing 100. It is formed on one side of the housing 100 so that the air flow passing through the inlet opening 116 and the outlet 117 can form a right angle, and the position of the outlet 117 is such that the air is discharged to the outdoors. It is enough if it is formed in the direction.

In order to maintain a firm connection between the upper body 110 and the lower body 120, a fixing ring groove 117a is formed along the outer periphery of the discharge portion 117 into which an external fixing ring 520, which will be described later, is inserted.

When the external fixing ring 520 is inserted into the fixing ring groove 117a, the upper body 110 and the lower body 120 are firmly coupled at the discharge portion 117, and the discharge portion 117 is connected to the upper body 110 and the lower body 120. While being pressed toward the center by the external fixing ring 520, the discharge film 500, which will be described later and which is mounted on the inner periphery of the discharge portion 117, can be firmly fixed without falling off due to no gap.

In addition, the discharge portion 117 of the internal fixing ring 510, which will be described later, has a slight elastic force, and the shape is changed by the elastic force of the internal fixing ring 510 and is slightly compressed.

The housing 100 is placed on the floor of the negative pressure room, and the discharge unit 117 is connected to a window leading to the outside of the negative pressure room to discharge the sucked air. Since windows are usually located higher than the floor, the discharge portion 117 may be formed to be inclined upward, as shown in FIG. 7 . However, it is not limited to this, and the discharge portion 117 may be formed horizontally without an inclination or may be inclined laterally, and it is sufficient as long as it assists air flow for discharge to the outside.

The discharge portion 117 may be formed in a structure that is detachable from the housing 100. A mounting groove 530 for coupling with the housing 100 is formed in the discharge portion 117, and a mounting protrusion 118 inserted into the mounting groove 530 is formed in the housing 100, so that the mounting The discharge portion 117 is fixedly coupled to the housing 100 by combining the protrusion 118 and the mounting groove 530.

Since the mounting protrusion 118 and the mounting groove 530 are formed in the circumferential direction along the outer periphery, they can freely rotate concentrically, and the inclination direction of the discharge portion 117 can be adjusted.

As the inclination direction of the discharge part 117 is adjusted, the discharge direction of the air discharged through the discharge part 117 changes. The discharge part 117 is adjusted by rotating it so that the discharge part 117 is tilted to the left, right, or upward corresponding to the direction in which the discharge membrane 500 communicates with the outdoors.

The discharge portion 117 inclined upward toward the window can quickly move the air inside the housing 100 to the window. When the air flow rises from the housing 100 toward the window, the inclined discharge portion 117 creates a flow toward the window, thereby adding air movement force.

Therefore, the air moves to the window along the inclined discharge path of the discharge part 117, and the air can be discharged quickly with low flow loss.

The air discharged through the discharge part 117 receives the power of the fan 300 and moves at a high flow rate, so it can be formed in a smaller area than the inlet opening part 116.

Due to the operation of the fan 300, a suction force is applied to the front of the housing 100 to suck the indoor air of the negative pressure room through the large inflow opening 116, but the flow rate is relatively low so that the indoor air flows stably. is formed, and the discharge portion 117 communicates with the outdoors without passing through the interior of the negative pressure room, so even if it is powered by the fan 300 and proceeds at a relatively high flow rate, it does not interfere with the air flow inside the negative pressure room.

The area of the inflow opening 116 may be formed to be the same as the area of the front end filter 200, which will be described later.

A cable hole 115 is formed in the housing 100 through which a power cable 610, which will be described later, can pass therethrough. In one embodiment of the present invention, the cable hole 115 is shown in the drawing as being formed at the joint between the upper body 110 and the lower body 120, but is not limited to that location.

The housing 100 is divided into an upper body 110 and a lower body 120 so that the inside can be opened. The upper body 110 and the lower body 120 are divided into two sections by dividing the housing 100 into cross sections, and then the upper housing 100 is referred to as the upper body 110 and the lower housing 100 is referred to as the lower body 120. It was named. However, it is not limited to this, and the housing 100 can be divided into left and right sides as shown in FIG. 7, and the housing 100 can be divided into front and rear ends as shown in FIG. 8. It can be dichotomized. In the present invention, the separate configuration of the left body and the right body is not explained separately, but is explained together as the upper body 110 and the lower body 120.

The upper body 110 and lower body 120 divide the housing 100 and the interior can be opened. Since the negative pressure machine of the present invention is intended to be reusable rather than disposable, the front filter 200, rear filter 400, and fan 300 provided inside the housing 100 must be maintained.

Therefore, the interior of the housing 100 can be opened by opening either the upper body 110 or the lower body 120, and the front filter 200 and the rear filter 400 provided inside the housing 100. And the fan 300 can be maintained so that it can be reused.

It is preferable that the front-end filter 200 and the back-end filter 400 are disposable and discarded after use. In the case of the fan 300, which is a relatively expensive and heavy item, it is sterilized through disinfection and cleaning and then reinstalled in the housing 100. It is economical and hygienic to do so.

Due to the housing 100, which is separately composed of the upper body 110 and the lower body 120, it is easy to enter the internal space and perform appropriate maintenance work, so the negative pressure device of the present invention can be used through a series of processing processes. It is reusable. Therefore, economic feasibility increases and even if an infectious disease spreads and the number of infected people increases rapidly, the process required to install a negative pressure machine can be omitted, so a negative pressure room can be quickly prepared to respond to and cope with the infectious disease.

A coupling protrusion 111 and a coupling groove 111a are formed at the joint of the upper body 110 and the lower body 120. The coupling protrusion 111 is inserted into the coupling groove 111a so that the upper body 110 and the lower body 120 are engaged with each other.

The coupling protrusion 111 and the coupling groove 111a are formed at the joint between the upper body 110 and the lower body 120. In one embodiment of the present invention, a coupling protrusion 111 is formed on one side of the upper body 110, and a coupling groove 111a is formed on the other side, and the lower part abuts the coupling protrusion 111 of the upper body 110. A coupling groove 111a is formed in the portion of the body 120, and a coupling protrusion 111 is formed in the portion of the lower body 120 that abuts the coupling groove 111a of the upper body 110. However, the positions of the coupling protrusion 111 and the coupling groove 111a are not limited to this, and when the upper body 110 and the lower body 120 are coupled, the coupling protrusion 111 is in the coupling groove 111a. Anything that fits is enough.

When the coupling protrusion 111 is inserted into the coupling groove 111a, a soundproof wall is formed at the joint between the upper body 110 and the lower body 120. The soundproof wall actually refers to the coupling protrusion 111 and the coupling groove 111a and does not mean a new structure or configuration.

As the coupling protrusion 111 is inserted into the coupling groove 111a, a stepped soundproof wall is formed at the joint between the upper body 110 and the lower body 120, so that the fan 300 provided inside the housing 100 As the noise passes through the joint between the upper body 110 and the lower body 120 and the step of the soundproof wall, the intensity of the noise is weakened and the noise is reduced, so the quietness of the negative pressure device of the present invention is increased.

The outer surface of the joint between the upper body 110 and the lower body 120 is surrounded and sealed with a sealing film 130. The sealing film 130 may be made of an adhesive material such as tape.

The coupling protrusion 111 is inserted into the coupling groove 111a and the sealing film 130 is attached to the joint portion to fix the coupled state of the upper body 110 and the lower body 120.

The sealing film 130 attached to one side of the housing 100 has a groove formed therein so that a power cable 610, which will be described later, which supplies power to the fan 300, passes through.

Looking at the internal structure of the housing 100, which consists of the upper body 110 and the lower body 120, in more detail with reference to FIG. 3, the internal structure of the housing 100 is a shear filter 200. , grooves are formed to support the rear filter 400 and the fan 300, respectively.

A shear receiving groove 112 into which the shear filter 200 can be inserted is formed at the rear of the inflow opening 116 in the housing 100. When the shear filter 200 is inserted into the shear receiving groove 112, the outer peripheral surface of the shear filter 200 is in close contact with the shear receiving groove 112.

A fan receiving groove 114 is formed that is spaced rearward from the shear receiving groove 112 and accommodates the fan 300. The fan receiving groove 114 is formed to be curved corresponding to the outer periphery of the fan 300. The fan 300 inserted into the fan receiving groove 114 is arranged to be spaced apart from the fan receiving groove 114 in the radial direction.

Since the space between the fan receiving groove 114 and the shear receiving groove 112 is spaced apart in the air flow direction, the fan 300 inserted into the fan receiving groove 114 and the shear filter inserted into the shear receiving groove 112 ( 200) are also spaced apart in the direction of air flow and do not contact. When the air flows into the inside of the air housing 100 by operating the fan 300, the air is not limited to the central part of the front filter 200 and can also pass through the edges. Therefore, the air does not pass only through a local area of the shear filter 200, but passes through the entire area, thereby improving the purification efficiency because the air is purified uniformly.

In front and behind the fan receiving groove 114, there is a first supporting groove 114a and a first supporting groove 114a into which a front end support 310 and a rear end support 320, which will be described later, which are structures supporting the fan 300, are inserted, respectively. 2 Jiji Suyom Home is formed.

The first support receiving groove 114a is a groove into which the front end support 310 is inserted, and the second support receiving groove 114b is a groove into which the rear end support 320 is inserted.

The first support receiving groove 114a and the second support receiving groove 114b are formed as thin, stepped grooves corresponding to the plate-shaped front end support 310 and the rear end support 320, The front end support 310 and the rear end support 320 inserted into the groove 114a and the second support receiving groove 114b are firmly supported without any play.

A rear-end receiving groove 113 into which a rear-end filter 400, which will be described later, is inserted is formed at the rear of the second support receiving groove 114b. The thickness of the rear end receiving groove 113 is thinner than the thickness of the front end receiving groove 112.

The front end receiving groove 112, the first support receiving groove 114a, the fan receiving groove 114, the second supporting receiving groove 114b, and the rear end receiving groove 113 are grooves formed inside the housing 100. am. Since the housing 100 can be separated into an upper body 110 and a lower body 120, the grooves listed above are formed on the inner surfaces of the upper body 110 and the lower body 120.

In order to open the interior of the housing 100, either the upper body 110 or the lower body 120 (preferably the upper body 110) is opened, and the shear filter 200 disposed inside the housing 100 is opened. ), the rear filter 400 and the fan 300 can be maintained. After maintenance is completed, the upper body 110 or lower body 120 is covered again, and the inner surfaces of the upper body 110 and lower body 120 are in strong contact with the outer peripheral surfaces of the front filter 200 and the lower filter. . Therefore, since there is no gap between the inner surface of the housing 100 and the outer peripheral surface of the front filter 200 and the rear filter 400, the air flowing into the housing 100 is only filtered through the front filter 200 and the rear filter 400. ) flows only through

In addition, since the noise generated by the operation of the fan 300 does not have any clearance and is emitted only through the front-end filter 200 and the back-end filter 400, the intensity is reduced as it passes through the front-end filter 200 and the back-end filter 400. .

As shown in FIGS. 2, 5, and 6, the fan 300 disposed in the center of the housing 100 allows air to flow into the housing 100 and discharge it to the outside through the discharge portion 117. This is a configuration that creates a one-directional flow of air.

The fan 300 is inserted into the fan receiving groove 114, and a sound absorbing material 340 is further disposed in a space spaced apart from the fan 300 and the fan receiving groove 114. The sound-absorbing material 340 surrounds the outer periphery of the fan 300 and serves as a soundproofing device to reduce noise from the fan 300.

The fan 300 is structurally supported by front end supports 310 and rear end supports 320 provided at the front and rear. The front end support 310 and the rear end support 320 are formed in a plate shape, and are coupled to and supported by the connection bar 330.

The leaflet supporter 310 has an intake port 311 formed in the center through which air passing through the leaflet filter 200 flows into the fan 300.

The shear support 310 on which the suction port 311 is formed is disposed to be spaced apart from the shear filter 200. Suction force is generated by the operation of the fan 300, and the air flowing into the housing 100 due to the suction force passes through the front filter 200. Since the intake port 311 and the front filter 200 are spaced apart, , the air passes uniformly across the entire area of the shear filter 200, flows toward the intake port 311 in the spaced space between the shear supporter 310 and the shear filter 200, and is sucked into the fan 300. .

The leaflet supporter 310 is fixedly coupled to the first support receiving groove 114a without clearance, and can firmly support the fan 300 inside the housing 100.

The rear end support 320 is a plate-shaped support disposed at the rear of the fan 300, and is coupled and supported by the front end support 310 and the connection bar 330, and the second support receiving groove 114b ) is inserted and placed.

A motor 321 that operates the fan 300 is disposed in the center of the rear end support 320 and is connected to the fan 300, so that the fan 300 can be operated by rotation of the motor 321. .

As shown in FIGS. 2, 4, and 6, a front-end filter 200 and a back-end filter 400 are disposed in front and behind the fan 300, respectively. The front end filter 200 is fitted into the front end receiving groove 112 inside the housing 100, and the rear end filter 400 is fitted into the rear end receiving groove 113.

The front filter 200 purifies viruses, bacteria, and dust present in the air as air flowing into the housing 100 passes through the inlet opening 116.

After passing through the front-end filter 200, the air receives a flow force through the fan 300, and is purified secondarily as it passes through the back-end filter 400.

The front-end filter 200 is a main purifying filter, and the back-end filter 400 is a filter that additionally purifies air, so the front-end filter 200 is formed to have a greater thickness than the back-end filter 400, thereby increasing the purification efficiency. This increases.

In addition, the front-end filter 200 and the back-end filter 400 have noise reduction capabilities in addition to purification capabilities. A front-end filter 200 and a back-end filter 400 are disposed in front and behind the fan 300, respectively, and are in close contact with the upper body 110 and the lower body 120 so that there is no clearance, so the fan 300 ) The noise must pass through the front-end filter 200 and the back-end filter 400 before being released to the inlet opening 116 or the discharge section 117.

Therefore, the intensity of the noise is weakened as it passes through the front-end filter 200 and the back-end filter 400, and the noise generated by the operation of the fan 300 is reduced, so that it does not cause inconvenience to the patient isolated in the negative pressure room.

As shown in Figures 2 to 4, a discharge film 500 made of a flexible material is fitted into the discharge portion 117 formed at the rear end of the housing 100. The discharge film 500 is configured to form an air flow path by communicating from the discharge unit 117 to the outdoors, and guides the air discharged from the discharge unit 117 to the outdoors.

The discharge film 500 may be made of an economical vinyl material, and its outer periphery is fitted in close contact with the inner periphery of the discharge portion 117.

An internal fixing ring 510 is provided inside the discharge film 500. The discharge film 500 is disposed between the inner periphery of the discharge portion 117 and the internal fixing ring 510.

The internal fixing ring 510 is configured to eliminate the gap between the discharge part 117 and the discharge film 500. Due to the elastic force of the internal fixing ring 510, the discharge film 500 is designed to expand. The outer surface receives an elastic force and comes into close contact with the inner surface of the discharge portion 117. In addition, the housing 100 is made of a material with some elasticity and is compressed due to the elastic force of the internal fixing ring 510, thereby increasing the degree of close contact between the discharge portion 117 and the discharge membrane 500.

The upper body 110 and the lower body 120 forming the discharge part 117 may be separated due to the elastic force of the internal fixing ring 510. In order to prevent this, the fixing ring groove 117a of the discharge part 117 ) The external fixing ring 520 is inserted into the.

The discharge part 117 is pressed toward the center by the external fixing ring 520 to fix the discharge film 500 inserted into the discharge part 117. The external fixing ring 520 maintains the shape of the discharge portion so that the space between the upper body 110 and the lower body 120 does not widen despite the expansion force of the internal fixing ring 510.

Therefore, the discharge film 500 is firmly adhered to the discharge portion 117 due to the expansion force of the internal fixing ring 510, and the expansion force of the internal fixing ring 510 is firmly supported by the external fixing ring 520. , the discharge film 500 can remain firmly coupled to the discharge portion 117.

As shown in Figures 1 and 2, a controller 600 that rotates and controls the motor 321 is provided outside the housing 100. The controller 600 can receive power from an external power source and control the operation of the motor 321 by controlling the power. However, it is not limited to this, and as shown in FIG. 8, the controller 600 may be provided integrally with the housing 100.

A power cable 610 is formed extending from the controller 600 to the motor 321. The power cable 610 passes through the housing 100 and is connected to the motor 321. The power cable 610 may be passed through the cable hole 115 formed at the joint between the upper body 110 and the lower body 120. In this case, the power cable 610 is also connected to the sealing film 130. ) is formed through a groove.

With reference to FIGS. 1 to 7, an example of a low-noise negative pressure machine of the present invention will be described to describe the flow of noise reduction and maintenance work for reuse.

The negative pressure machine of the present invention is provided with a front filter 200, a rear filter 400, and a fan 300 inside a housing 100 consisting of an upper body 110 and a lower body 120.

The fan 300 is operated and flows into the housing 100 through the inflow opening 116 formed at the front of the housing 100, passing through the front filter 200, and passing through the fan 300. It receives power and is discharged to the discharge unit 117 through the rear filter 400.

When discharged to the discharge unit 117, it moves along the slope of the discharge unit 117 and can quickly flow outdoors without loss of fluidity.

When the motor 321 rotates and the fan 300 operates, noise is generated as air flow is formed in the direction from the inlet opening 116 to the outlet 117.

The noise of the fan 300 is reduced by the sound-absorbing material 340 surrounding the fan 300, and as it passes through the front-end filter 200 and the back-end filter 400, the intensity becomes weaker and is emitted to the outside of the housing 100. do.

Since the front filter 200 and the rear filter 400 are provided in close contact with the upper body 110 and the lower body 120, noise is generated between the inner surface of the housing 100 and the front filter 200 and the rear filter 400. It cannot be released due to a gap in .

At the joint portion of the upper body 110 and the lower body 120, the coupling protrusion 111 is inserted into the coupling groove 111a and coupled to form a stepped soundproof wall.

When the noise of the fan 300, which is reduced by the sound absorbing material 340, is emitted to the outside of the housing 100, the intensity is further weakened as it hits the stepped and curved soundproofing wall. In addition, even if it passes through the soundproof wall formed by the coupling protrusion 111 and the coupling groove 111a, the joint is sealed by the sealing film 130, so noise can be further reduced.

When performing maintenance work to reuse the negative pressure machine of the present invention, either the upper body 110 or the lower body 120 is separated to open the inside of the housing 100.

It is desirable to replace the front-end filter 200 and the rear-end filter 400 with new parts for hygienic reasons.

The fan 300 is relatively heavy and expensive, so it is cleaned and disinfected rather than replaced. The fan 300 that has gone through the cleaning and disinfection process is mounted inside the housing 100.

The housing 100, which consists of the upper body 110 and the lower body 120, can be reused, but if the exterior is damaged or damaged, one or more of the upper body 110 and the lower body 120 must be replaced. You can use it.

The housing 100 is made of a relatively economical foamed styrene resin material, allows for mass production, and is light in weight.

The low-noise negative pressure machine according to the present invention has a sound-absorbing material 340, a soundproof wall formed by coupling protrusions 111 and coupling grooves 111a, a front-end filter 200, and a rear-end filter 400 surrounding the fan 300, so the housing 100 ) is sealed, which has the advantage of increasing the purification ability and simultaneously reducing the noise of the fan (300).

In addition, it is composed of an upper body 110 and a lower body 120, so that the interior of the housing 100 can be easily opened, and maintenance work on the front filter 200, rear filter 400, and fan 300 can be easily performed. Since it can be performed and reused, it can contribute to the immediate expansion of negative pressure rooms even if an infectious disease outbreak occurs and the number of infected people increases rapidly.

100: Housing 110: Upper body 111: Coupling protrusion 111a: Coupling groove 112: Shear receiving groove
113: Rear end receiving groove 114: Fan receiving groove 114a: First supporting receiving groove 114b: Second supporting receiving groove
115: cable hole 116: inlet opening 117: outlet 117a: fixing ring groove 118 mounting protrusion
120: Lower body 130: Sealing film
200: Front filter
300: Fan 310: Front end supporter 311: Inlet 320: Rear end supporter 321: Motor
330: Connecting rod 340: Sound absorbing material
400: Rear end filter
500: Discharge membrane 510: Internal fixing ring 520: External fixing ring 530: Mounting groove
600: Controller 610: Power cable

Claims (7)

In a negative pressure machine that maintains the indoor air pressure at a lower negative pressure than the outside,
The interior is hollow, and an inlet opening 116 for sucking in indoor air is formed at the front, and a discharge portion 117 for discharging the sucked air to the outside is formed at the rear end, and the upper body 110 and the lower body A housing 100 that is provided separately into a body 120 and whose hollow interior is opened by opening either the upper body 110 or the lower body 120, but whose shape is variable by external force;
A sealing film 130 that is provided along the seam of the upper body 110 and the lower body 120 and is arranged at a certain width up and down at the seam to secure the upper body 110 and the lower body 120 from the outer surface. ;
A fan 300 provided in the center of the housing 100 and forming an air flow from the inlet opening 116 to the outlet 117;
A front end filter 200 inserted into the housing 100, the outer peripheral surface of which is in close contact with the upper body 110 and the lower body 120, and disposed between the fan 300 and the inlet opening 116; and
It includes a discharge film 500 that is fitted inside the discharge portion 117 and is in close contact with the inner surface of the discharge portion 117 through which an internal fixing ring 510, which is a hard ring, is inserted therein,
The discharge portion 117 of the housing 100 changes its shape by external force,
The discharge part 117 is provided with an external fixing ring 520 surrounding the discharge part 117,
The discharge film 500 is disposed between the inner periphery of the discharge part 117 and the internal fixing ring 510, and the discharge part 117 is pressurized by the external fixing ring 520, and the discharge film ( 500)
Low noise negative pressure machine.
According to paragraph 1,
A rear-end filter 400 whose outer circumferential surface is surrounded by the upper body 110 and lower body 120 is provided between the discharge unit 117 and the fan 300, and the discharged air is discharged into the discharge membrane 500. reducing noise
Low noise negative pressure machine.
According to paragraph 1,
A coupling protrusion 111 and a coupling groove 111a are formed at the joint of the upper body 110 and the lower body 120 and engage with each other,
As the coupling protrusion 111 is inserted into the coupling groove 111a, a stepped soundproof wall is formed at the joint between the upper body 110 and the lower body 120.
Low noise negative pressure machine.
According to paragraph 1,
The housing 100 is
a curved fan receiving groove 114 in which the fan 300 is accommodated; and
A shear receiving groove (112) is formed that is spaced forward of the fan receiving groove (114) and accommodates the shear filter (200),
The fan 300 accommodated in the fan receiving groove 114 and the shear filter 200 accommodated in the shear receiving groove 112 are arranged to be spaced apart in the air flow direction,
The fan 300 and the fan receiving groove 114 are arranged at regular intervals in the radial direction.
Low noise negative pressure machine.
delete According to paragraph 4,
A sound-absorbing material 340 surrounding the fan 300 is disposed in the space spaced apart between the fan 300 and the fan receiving groove 114.
Low noise negative pressure machine.
According to paragraph 1,
A mounting protrusion 118 and a mounting groove 530 are formed in the circumferential direction at the joint of the inclined discharge portion 117 and the housing 100 and engage with each other,
As the discharge unit 117 rotates, the air discharge direction changes.
Low noise negative pressure machine.