KR102173979B1 - Sterilizer using humidifying air - Google Patents

Abstract

The present invention relates to a sterilization and disinfection device using humidified air. The sterilization and disinfection device using humidified air comprises: a main body (10) including a passageway (11) and an exhaust part fixing hole (12); a chemical liquid container (20); a humidifying means (30); a humidified air moving pipe (40); a humidified air exhaust unit (50); a lower exhaust pipe (60); and a footrest (70). According to the present invention, humidified air converted from a chemical liquid can increase an area in contact with the clothing and skin of a person entering a building. Thus, the efficiency of sterilization and disinfection can be remarkably improved.

Description

Sterilizing device using humidified air{STERILIZER USING HUMIDIFYING AIR}

The present invention relates to a sterilization and sterilization device installed at an entrance of a building, as well as a festival or event hall, and more particularly, to a sterilization and sterilization device using humidified air that converts and sprays a chemical liquid into humidified air using a humidifying means. .

In general, cleaning and disinfection in the field of health and hygiene can be said to be a basic and overall method for securing a sanitary environment in the area and space.

In particular, since the entrance space of a public facility where an unspecified number of people frequently enters and exits the entrance space of an external transmission factor contact and a contact propagation object, the spread of the transmission factor is prevented through disinfection of the entrance space.

In addition, food industry, biological industry, life-related research institutes, etc. are always making every effort to prevent the spread of infectious agents as the risk of infection, contamination and external transmission of various pathogenic microbial factors is always lurking.

Therefore, a method of spraying high-pressure air using an air shower to remove various kinds of dust on the body, etc., before entering and exiting the workplace where the inflow of bacteria or foreign substances should be blocked, has been widely used.

In addition, in order to increase the sterilization and disinfection effect, technologies and products that increase the sterilization effect by adding a structure to spray disinfectant through a spray nozzle have been released, and as an example, Korean Laid-Open Patent Publication No. 10-2019-0076579 is disclosed.

The above technology enhances the sterilization effect by spraying the disinfectant with fine particles through the spray nozzle, but the sterilization and disinfection of the sprayed area is possible due to the size of the disinfectant particles to be sprayed. There was a problem that clothes became wet due to the disinfectant.

In addition, there is a problem in that an independent space is required for sterilization and disinfection, so that the installation cost is increased, and the number of visitors is limited to 4 or less at a maximum due to sterilization and disinfection in a limited space.

Meanwhile, Korean Laid-Open Patent Publication No. 10-2012-0076579 is disclosed as a patent for a structure that is sterilized and sterilized in an open space. However, even in the case of the above technology, since the disinfectant is sprayed through the spray nozzle, the clothes get wet due to the disinfectant sprayed with a considerable particle size, and the sterilization and disinfection are not evenly distributed to all parts, resulting in a sterilization efficiency. There was still a problem with a sharp drop.

In particular, the spraying method through the spraying nozzle has a problem that the sterilization efficiency is very low because it is sprayed little or hardly sprayed on the left and right sides of the visitor while passing by within a short time.

Republic of Korea Patent Publication No. 10-2019-0076579 (2019.07.02 Visitor sterilization and disinfection room) Republic of Korea Patent Publication No. 10-2012-0076579 (2012.03.19 Personal disinfection structure)

The present invention was invented to solve the above problems, and an object of the present invention is to convert the chemical solution into humidified air and spray it so that the clothes of the visitor are not wet, and the humidified air is present in a floating state on the passageway. It is possible to increase the area in contact with the clothes and skin of clothing, which can greatly increase the sterilization and disinfection efficiency.In particular, as the humidified air is suspended in the passageway, sterilization and disinfection efficiency even when a large number of visitors enter and exit at the same time. It is to provide a sterilization and sterilization device using this high humidified air.

In addition, the present invention is to provide a sterilization and sterilization apparatus using humidified air that can be used by adjusting the exhaust direction appropriately according to the situation, since the exhaust direction of the humidified air can be adjusted by changing the location of the exhaust hole through the rotation of the exhaust pipe. .

In the sterilization and sterilization apparatus using humidified air of the present invention for achieving the above object, the front and rear sides are opened to form a passageway 11, and both side walls face the passageway 11 and the exhaust part fixing hole 12 at a set interval. ) The main body 10; A chemical liquid container 20 provided in the inner space 13 of one side wall of the main body 10 and receiving a chemical liquid therein; A humidifying means 30 connected to the chemical liquid container 20 to receive a chemical liquid from the chemical liquid container and generate humidified air (A); A humidifying air moving pipe 40 connected to the humidifying means 30 at one end to move the humidified air A generated by the humidifying means to both sides and lower portions of the main body 10; A humidified air exhaust part 50 that is coupled to the exhaust part fixing hole 12 of the main body 10 to receive humidified air through the humidified air moving pipe 40 and exhaust humidified air in the lateral direction of the passageway 11 ); A plurality of lower exhaust holes 61 are formed on the surface to be installed under the body 10 to receive humidified air through the humidified air moving pipe 40 and exhaust humidified air in the downward direction of the passageway 11 Lower exhaust pipe 60; In the lower part of the main body 10, it is spaced a certain distance from the upper side of the lower exhaust pipe 60 and installed to pass through, and the humidified air A exhausted from the lower exhaust hole 61 passes through the surface and passes through the passageway ( 11) a foot plate 70 having a plurality of exhaust guide holes 71 formed therein to be exhausted to, and the humidified air exhaust unit 50 is fitted into the exhaust unit fixing hole 12 so that the rim portion is an exhaust unit fixing hole (12) The exhaust pipe 51 formed to be hung on the edge of the exhaust pipe 51, and formed to be connected to the humidified air moving pipe 40 on the rear surface of the exhaust pipe 51, but is formed to be deflected to one side to prevent the rotation of the exhaust pipe 51 The exhaust hole 52 is provided to adjust the exhaust direction by varying the position through the exhaust pipe 51, and a plurality of exhaust holes 52 are installed to be elastically operated in an outward direction on the rear edge of the exhaust pipe 51, and at the edge of the exhaust fixing hole 12 It consists of an elastic binding piece 53 that fixes the exhaust pipe 51 while being hooked and bound.

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It is preferable that an LED module 55 is installed in the humidified air exhaust unit 50 so that a person can visually identify the person entering by irradiating light to the humidified air exhausted in the lateral direction of the passageway 11.

On the other hand, the upper frame 15 is installed on the upper part of the main body 10 so as to be connected to both side walls, and the upper frame 15 is connected to the humidified air moving pipe 40 to move the humidified air upward of the passageway 11. An upper exhaust unit 16 for exhausting and a lighting unit 17 for lighting may be installed, respectively.

According to the sterilization and sterilization device using humidified air composed of the above configuration, the chemical liquid is made into humidified air using a humidifying means and sprayed, so that the clothes of visitors are not wet due to fine particles, and even if humidified air touches the skin, it is not unpleasant. It works.

In addition, as humidified air is suspended in the passageway, it has an excellent effect in preventing the spread of infectious factors by increasing the contact area with the clothes and skin of visitors. It is possible to sterilize and disinfect even in an existing space, so even if it is installed in a place where a large number of visitors pass by, a sufficient sterilization and disinfection effect can be obtained by the suspended humidified air.

In addition, since it is possible to control the exhaust direction, it is possible to effectively control the exhaust according to the situation, thereby increasing the sterilization and disinfection efficiency.

1 is a perspective view of a sterilization and sterilization apparatus using humidified air according to the present invention,
2 is a cross-sectional view taken along AA of FIG. 1,
Figure 3 is a state in which humidified air is sprayed and suspended in Figure 2;
Figure 4 is a plan cross-sectional view showing a lower exhaust pipe installed in the lower portion of the main body according to the present invention;
5 is an exploded perspective view showing a humidified air exhaust part connected to the humidified air moving pipe according to the present invention;
6 is an installation state diagram of humidified air exhaust units installed on both left and right sides of the main body according to the present invention,
7 is a state diagram showing an inclined bottom surface, a water supply unit, and a water drainage hole under the main body according to the present invention;
8 is a state diagram showing an upper frame installed to close an upper opening of the main body according to the present invention, and a lighting means and a humidified air exhaust unit installed in the upper frame;
Figure 9 is a state diagram of a sterilization and disinfection device according to the present invention.

Hereinafter, a sterilization and sterilization apparatus using humidified air according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in the figure, the sterilization and sterilization device using humidified air according to the present invention is provided in a main body 10 in which a passageway 11 is formed by opening the front and rear sides, and an inner space 13 on one side wall of the main body 10 And a chemical liquid container 20 containing a chemical liquid therein, a humidifying means 30 for generating humidified air A by receiving the chemical liquid from the chemical liquid container 20, and the humidifying means 30 and one end connected thereto. Humidified air moving pipe 40 to move the humidified air (A), and a humidified air vessel connected to the humidified air moving pipe 40 to receive humidified air and exhaust the humidified air in the lateral direction of the passageway 11 A base 50, a lower exhaust pipe 60 installed under the main body 10 to exhaust humidified air A in a downward direction of the passage 11, and an upper portion of the lower exhaust pipe 60 It covers the external exposure of the lower exhaust pipe and consists of a scaffold 70 having a plurality of exhaust guide holes 71 formed on the surface to uniformly exhaust the humidified air (A).

The main body 10 may be provided in a form in which pillars are installed on both side walls as shown in FIG. 1, or may be formed in a tunnel structure by having an upper frame as shown in FIG. 8, and the main body 10 is installed. It can be installed by adjusting the horizontal and vertical length and width according to the location.

Exhaust part fixing holes 12 are formed on both side walls of the main body 10 at set intervals facing the passage 11 in order to install the humidified air exhaust part 50.

In addition, it is preferable that the main body 10 is provided with a detection sensor 13 for detecting a person entering. This is to operate the humidification means 30 only when there is a person passing through the passageway 11 to exhaust the humidified air to the passageway, and when there is no person entering the passageway, the operation of the humidification means 30 is stopped. Of course, it is possible to reduce the waste of chemical liquids.

In addition, although not shown in the main body 10, it is natural that a control unit is provided to control the operation of the humidifying means and to receive a signal sensed from the detection sensor.

On the other hand, advertising boards 19 may be separately installed on both side walls of the main body 10 so that a person entering and exiting may be identified by writing a promotional text or a notification text.

A disinfectant made of a component harmless to the human body is dissolved in water in the chemical solution contained in the chemical solution container 20. The disinfectant may be dissolved in water in advance, or a water container and a disinfectant container may be provided, and the disinfectant stored in the disinfectant container may be supplied to the water container by a predetermined amount and diluted and used.

The humidifying means 30 is a means for generating humidified air A through vaporization, and may be provided in an inner space of one side wall of the main body 10.

The humidification means 30 may be used in any structure as long as it has a structure capable of generating humidified air, and as an example, an ultrasonic humidifier having a rich amount of humidification may be used.

The humidified air moving pipe 40 is connected to the humidifying means 30 to move the humidified air generated by the humidifying means to the upper part of the main body when the upper exhaust part to be described later is formed, as well as both sides and the lower part of the main body, Aluminum pipes or resin pipes can be used to prevent corrosion.

The humidified air exhaust part 50 is coupled to the exhaust part fixing hole 12 of the main body 10, and the humidified air moving pipe 40 is connected to receive humidified air through the humidified air moving pipe, and the passage 11 ), the humidified air is exhausted.

At this time, the humidified air (A) exhausted to the passageway (11) does not sink in the downward direction of the passageway (11) but floats, and as it exists in such a floating state, it effectively sterilizes and sterilizes those entering and leaving the passageway (11). It has the advantage of being able to sterilize and disinfect with the passage open without a separate entrance door as it is in a floating state.

As an embodiment of the humidified air exhaust part 50, the exhaust pipe 51 is inserted into the exhaust part fixing hole 12 so that the rim part hangs on the edge of the exhaust part fixing hole 12, and the exhaust pipe 51 An exhaust hole 52 formed to be deflected to one side on the rear side and connected to the humidified air moving pipe 40, and a plurality of elastic coupling pieces 53 installed at the rear edge of the exhaust pipe 51 to elastically operate in an outward direction. Consists of

The exhaust pipe 51 has no significant meaning in its shape, but it is preferable that the inner diameter of the exhaust pipe 51 becomes narrower from the front to the rear to guide the humidified air exhausted through the exhaust hole while preventing the exhaust hole 52 from protruding to the outside. something to do.

Here, the exhaust hole 52 is preferably formed to be deflected toward one side rather than the center of the rear surface. The reason is to adjust the exhaust direction by changing the position of the exhaust hole by rotating the exhaust pipe 51 as needed.

Moreover, when the width of the passage 11 is narrow and the humidified air exhaust units 50 are installed to face each side wall of the main body 10, the humidified air exhausted from both sides of the narrow passage may collide with each other. It may occur, but it is to minimize such a collision by adjusting the exhaust direction through the change of the position of the exhaust hole 52.

In addition, the elastic binding piece 53 is caught by the edge of the exhaust part fixing hole 12 and is bound to fix the exhaust pipe 51. Of course, it is possible to release the binding state at any time as it is provided to be elastically operated, and when the position of the exhaust hole 52 is to be varied as described above, the exhaust pipe 51 can be easily fixed.

The lower exhaust pipe 60 is provided to exhaust the humidified air not only in a lateral direction but also in a downward direction.

A plurality of lower exhaust holes 61 are formed on the surface of the lower exhaust pipe 60 to exhaust the humidified air supplied through the humidified air moving pipe 40 to the lower side of the passageway.

In the accompanying drawings, a plurality of lower exhaust pipes 60 are provided and arranged at a predetermined interval.

The lower exhaust pipe 60 may be made of aluminum or a resin pipe, which is the same material as the humidified air moving pipe to prevent corrosion.

The scaffolding 70 is made of a plate body having a certain area so that visitors can walk through, and to guide the surface to uniformly exhaust the humidified air exhausted from the lower exhaust hole 61 in the lower direction of the passageway. A plurality of exhaust guide holes 71 are formed.

Here, the lower exhaust pipe 60 is arranged to be positioned between the exhaust guide holes 71 so as not to be located on the same vertical line as the exhaust guide hole 71 formed in the footrest 70, and through the exhaust guide hole 71 Prevent foreign substances such as fallen soil from entering the lower exhaust hole.

With the scaffold 70 provided, the humidified air (A) exhausted through the lower exhaust hole 61 is filled in the inner space formed by the scaffold 70 and then through the exhaust guide hole 71 formed in the scaffold 70. It can be uniformly exhausted in the downward direction of the passage.

Looking at the disinfection and sterilization process of the sterilization and sterilization apparatus using the humidified air of the present invention configured as described above, the detection sensor 13 detects the visitor when a person approaches the main body 10 with the front and rear opened, and the control unit detects it. The humidification means 30 is operated according to the signal to generate humidified air (A), and the generated humidified air is passed through the exhaust hole 52 and the lower exhaust hole 61 through the humidified air moving pipe 40. It is exhausted in the lateral and downward directions of (11).

The humidified air exhausted to the passage is in a floating state, and the person passing through the passage is sterilized and sterilized by contacting the skin as well as clothing with the suspended humidified air.

At this time, the humidified air (A) is made of fine particles and is in a state of water vapor suspended in the air, so that even if it comes into contact with the clothes of a person entering the door, the clothes will not get wet, and even if it comes into contact with the skin, there is no discomfort.

Moreover, there is an advantage in that the effect of sterilization and disinfection is remarkably increased because the humidified air naturally evenly contacts the body and clothing of the visitor during the passage.

In addition, since it is possible to sterilize and disinfect people walking in open spaces rather than enclosed spaces, it is possible to effectively sterilize and sterilize multiple visitors by installing them in places such as performance halls or event halls with a large number of moving populations. It has an excellent effect in preventing spreading.

On the other hand, it is preferable that the LED module 55 is installed in the humidified air exhaust unit 50 to irradiate light to the passageway 11.

The reason for installing the LED module 55 is to allow visitors to visually identify the humidified air exhausted to the side of the passageway 11 through irradiation of light. You can recognize that it is done.

Furthermore, it is possible to create a visual effect by changing the color of light irradiated from the LED module into red, blue, or other colors.

On the other hand, the lower exhaust hole 61 of the present invention is formed on one side or both sides of the lower exhaust pipe 60 to prevent the hole from being blocked by foreign substances such as soil falling through the exhaust guide hole 71 It is desirable.

Accordingly, since the lower exhaust hole 61 is prevented from being blocked by foreign substances such as soil, it is possible to smoothly exhaust the humidified air without clogging the hole.

At this time, a blower fan 41 is installed on one side of the humidified air moving pipe 40 to effectively forcibly blow the humidified air A generated by the humidifying means 30 to the exhaust pipe and the lower exhaust pipe of the humidified air exhaust part. This is desirable.

Due to the installation of the blower fan 41, it is possible to forcibly blow the humidified air, so that the humidified air can be exhausted to the middle of the passage, as well as increase the amount of humidified air floating on the passage. I can.

Of course, the blowing fan 41 is capable of arbitrarily adjusting the exhaust speed of the humidified air (A) exhausted by adjusting the rotation speed of the fan, and the amount of humidification by controlling the intensity of the humidifying means along with the intensity of the blowing fan. You can try to increase more.

In addition, in the present invention, an upper frame 15 may be installed to cover the opened upper side of the main body 10 as shown in FIG. 8, and an upper exhaust part 16 and a lighting part 17 are provided on the lower surface of the upper frame 15. ) May be provided in plurality.

The upper exhaust unit 16 is connected to the humidified air moving pipe 40 to receive humidified air and exhaust the humidified air in the upward direction of the passageway 11.

The structure of the upper exhaust unit 16 has the same structure as that of the humidified air exhaust unit 50.

The lighting unit 17 is intended to enable the visitor to accurately recognize the location of the passageway at night through illumination, and is provided to be arranged in a row in the same direction as the passageway of the passageway 11 to guide the entry and exit direction to the visitor. You can also give it.

At this time, the lighting unit 17 can be used for various reasons including a modeling effect and a visible effect, and in particular, even at night when the field of view is narrowed, or when fog or fire occurs, the lighting unit 17 is illuminated in the same direction as the passage direction of the passage 11 Because this is formed, it provides an additional effect of allowing visitors to safely evacuate by recognizing the lighting in an emergency situation.

On the other hand, the lower inner bottom surface of the body 10 on which the lower exhaust pipe 60 is installed is formed as an inclined surface 18 inclined at a certain angle, and one side of the scaffold 70 adjacent to the side wall of the body 10 It is preferable that a water supply part 72 is formed at the edge to allow water to be drawn in.

Since the water supply unit 72 is formed, water is supplied through the water supply unit when a lot of foreign substances are loaded on the bottom inner bottom surface of the main body so that the foreign substances loaded by the water moving along the slope can be cleaned. do.

The water supply unit 72 is closed by covering with a closing means such as a rubber stopper or a cover in order to reduce the inflow of foreign substances when water supply is not required.

Further, a water drain hole 73 is formed on the other side of the scaffold 70 to discharge foreign substances such as water and soil supplied for cleaning to the outside.

As described above, the sterilization and sterilization apparatus using humidified air of the present invention is not a method of spraying a chemical solution through a conventional spray nozzle, but by humidifying and spraying a chemical solution, so that the clothes are in contact with the person's outer clothing or skin without the problem of getting wet. By maximizing the area, the sterilization and disinfection effect is maximized, and as humidified air is scattered on the passageway, the sterilization and disinfection efficiency is high even when a large number of visitors enter and exit at the same time. This is a very excellent invention.

10: main body 11: passage
12: exhaust part fixing hole 13: internal space
14: detection sensor 15: upper frame
16: upper exhaust part 17: lighting part
18: slope 19: billboard
20: chemical liquid container 30: humidification means
40: humidified air moving pipe 41: blowing fan
50: humidified air exhaust unit 51: exhaust pipe
52: exhaust hole 53: binding piece
55: LED module 60: lower exhaust pipe
61: lower exhaust hole 70: footrest
71: exhaust guide hole 72: water supply
73: water drainage hole

Claims (7)

The front and rear are opened to form a passageway 11, and an exhaust part fixing hole 12 is provided on both side walls at a set interval facing the passageway 11;
A chemical liquid container 20 provided in the inner space 13 of one side wall of the main body 10 and receiving a chemical liquid therein;
A humidifying means 30 connected to the chemical liquid container 20 to receive a chemical liquid from the chemical liquid container and generate humidified air (A);
A humidifying air moving pipe 40 connected to the humidifying means 30 at one end to move the humidified air A generated by the humidifying means to both sides and lower portions of the main body 10;
A humidified air exhaust part 50 that is coupled to the exhaust part fixing hole 12 of the main body 10 to receive humidified air through the humidified air moving pipe 40 and exhaust humidified air in the lateral direction of the passageway 11 );
A plurality of lower exhaust holes 61 are formed on the surface to be installed under the body 10 to receive humidified air through the humidified air moving pipe 40 and exhaust humidified air in the downward direction of the passageway 11 Lower exhaust pipe 60;
In the lower part of the main body 10, it is spaced a certain distance from the upper side of the lower exhaust pipe 60 and installed to pass through, and the humidified air A discharged from the lower exhaust hole 61 passes through the surface of the passageway ( It consists of; a scaffold 70 formed with a plurality of exhaust guide holes 71 to be exhausted to 11),
The humidified air exhaust unit 50 includes an exhaust pipe 51 that is fitted into the exhaust unit fixing hole 12 so that an edge portion is hung on the edge of the exhaust unit fixing hole 12, and the rear side of the exhaust pipe 51 An exhaust hole 52 formed to be connected to the humidified air moving pipe 40 and supported to be deflected to one side to adjust the exhaust direction by changing a position through the rotation of the exhaust pipe 51, and the exhaust pipe 51 A humidification, characterized in that consisting of an elastic binding piece 53 that fixes the exhaust pipe 51 while being attached to the edge of the exhaust part fixing hole 12 by installing a plurality of elastically operated outwardly at the rear edge of the) Sterilization and disinfection device using air.
delete The method of claim 1,
Using humidified air, characterized in that the humidified air exhaust unit 50 is equipped with an LED module 55 that irradiates light to the humidified air exhausted in the lateral direction of the passageway 11 so that the person in and out can visually identify it. Sterilization and disinfection device.
The front and rear are opened to form a passageway 11, and an exhaust part fixing hole 12 is provided on both side walls at a set interval facing the passageway 11;
A chemical liquid container 20 provided in the inner space 13 of one side wall of the main body 10 and receiving a chemical liquid therein;
A humidifying means 30 connected to the chemical liquid container 20 to receive a chemical liquid from the chemical liquid container and generate humidified air (A);
A humidifying air moving pipe 40 connected to the humidifying means 30 at one end to move the humidified air A generated by the humidifying means to both sides and lower portions of the main body 10;
A humidified air exhaust part 50 that is coupled to the exhaust part fixing hole 12 of the main body 10 to receive humidified air through the humidified air moving pipe 40 and exhaust humidified air in the lateral direction of the passageway 11 );
A plurality of lower exhaust holes 61 are formed on the surface to be installed under the body 10 to receive humidified air through the humidified air moving pipe 40 and exhaust humidified air in the downward direction of the passageway 11 Lower exhaust pipe 60;
In the lower part of the main body 10, it is spaced a certain distance from the upper side of the lower exhaust pipe 60 and installed to pass through, and the humidified air A discharged from the lower exhaust hole 61 passes through the surface of the passageway ( It consists of; a scaffold 70 formed with a plurality of exhaust guide holes 71 to be exhausted to 11),
The lower exhaust hole 61 is formed on one side or both sides of the lower exhaust pipe 60 so that the hole is not blocked by foreign substances falling into the exhaust guide hole 71 .
The method of claim 1,
A blowing fan 41 is installed to be connected to one side of the humidified air moving pipe 40 to blow the humidified air A generated by the humidifying means 30,
A sterilization and sterilization apparatus using humidified air, characterized in that the main body (10) is equipped with a detection sensor (13) to detect a pedestrian entering the passageway (11) to control the operation of the humidification means (30).
The method of claim 1,
An upper frame 15 is installed on the upper part of the main body 10 to be connected to both side walls,
The upper frame 15 is connected to the humidified air moving pipe 40 and has an upper exhaust unit 16 for exhausting the humidified air in the upper direction of the passage 11 and a lighting unit 17 for lighting, respectively. Sterilization and disinfection device using humidified air.
The method of claim 1,
The lower inner bottom surface of the main body 10 on which the lower exhaust pipe 60 is installed is formed as an inclined inclined surface 18,
A water supply part 72 is formed at one edge of the scaffold 70 adjacent to the sidewall of the main body 10 to clean the foreign substances that have fallen to the inclined surface 18 by introducing water, and a portion of the other side of the scaffold 70 In the sterilization and sterilization apparatus using humidified air, characterized in that the water drainage hole 73 is formed to drain the water introduced into the outside.

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