KR100894301B1 - Multi heaping air curtain unit - Google Patents

Abstract

An air curtain unit for being piled up on a top and bottom multi-stages is provided to prevent and block the inflow of a foreign material and to make an air current of top and bottom uniform. An air curtain unit for being piled up on a top and bottom multi-stages comprises: a plurality of block unit(100,100') laminated on both sides of a gateway(300); and a block unit having a fan assembly driven with a motor and front panels(150,150'). The front panel has air discharge slits(152,152') and suction grills(154,154') in order to be formed with the vertical direction. The front panels in the block unit are mutually faced in the gateway either side. The discharge slits of one side front panel is faced in the suction grills of the front panel other side.

Description

Multi-curing air curtain unit

The present invention relates to an air curtain unit that can be stacked in multiple stages up and down, by stacking unit units having a fan assembly in multiple stages up and down on both sides of an entrance, such as a freezer, so that air is uniformly blown out and circulated. The present invention relates to an air curtain unit that can be stacked in multiple stages of upper and lower stages by uniformizing the airflow in the upper and lower working environments to prevent the blocking of external air and inflow of foreign substances, and to facilitate inspection and replacement of each unit.

In general, air curtains are designed to maintain the cold air of refrigerated warehouses and to block the inflow of external air, and to emphasize the recent food hygiene, Hazard Analysis Critical Control Point (HACCP). In order to comply with), it is installed for the purpose of blocking the invasion of foreign substances such as pests and dust.

From the above point of view, such as the 'air curtain device' of Japanese Patent Laid-Open No. 6-323594 (hereinafter, 'prior art 1') is installed on the ceiling side 1 as shown in Fig. 1 (a). Duct provided with a blower 5 provided with a blower outlet 2 facing downward and a suction hole 3 facing the interior side, and a first opening 6 and a second opening 7 installed upward in the floor 4. It is a structure provided with (8).

Here, reference numerals 2a, 3a, and 8c denote louvers, 8a and 8b denote pressure chambers, 9 denotes a multi-wing fan, 10 denotes an entrance, and A and B denote an air flow.

In addition, such as the "air curtain device" (hereinafter referred to as "prior art 2") of Japanese Patent Laid-Open No. 2000-249382, the heat dissipation door 10a of the outer wall of the building 50 having a temperature difference, as shown in Figure 1 (b) And an outside air flow passage 12 formed by an air inlet 11a and an air inlet 11b respectively installed at 10b, and circulation of air is a circulation fan installed at an upper side of the heat dissipation doors 10a and 10b. 13a) through the reflux path 13 interconnecting each of the heat dissipation doors 10a and 10b.

Here, reference numerals 16a and 16b denote internal flow paths that interconnect the air outlet 11a and the air inlet 11b.

However, the prior art 1 not only involves cumbersome operations such as digging and purchasing the floor 4 to install the duct 8 of the floor 4 together with the blower 5 of the ceiling side 1, Inspection and cleaning are difficult and hygiene problems are also exposed.

That is, the prior art 1 is not only a problem that the foreign material is introduced into the room through the first and second openings 6 and 7 while falling as the operator and the moving object, such as a forklift or a freezer, as it is, the wind There was also a difficult problem of cleaning the duct (8).

In addition, the prior art is generated in the upper side of the head of the worker and the person who enters and exits when the blower 5 and the circulation fan 13a are mounted on the ceiling side 1 and the heat dissipation doors 10a and 10b. Not only can the discomfort be created due to the noise, but the flow of air is disturbed as the airflow around the operator and the moving object, such as a forklift or a freezer, and the worker's entry and exit causes heat loss.

Therefore, the prior art is difficult to maintain a uniform pressure and air flow of the air along the up and down direction of the entrance in a large refrigerated warehouse that is wide and high entrance and frequent entry and exit of forklifts and freezers, heat loss occurs .

In particular, in the case of the prior art 2, since the circulation of air is controlled by the circulation fan 13a on the upper side of the heat dissipation doors 10a and 10b, the heat dissipation doors 10a and 10b are generated along the vertical direction. There was a problem that it is difficult to equalize the pressure difference, that is, positive and negative pressure.

In order to solve the above problems, such as 'air shutter and its installation method' (hereinafter, referred to as 'prior art 3') of Japanese Patent Laid-Open No. 2004-77113, as shown in FIG. Fan groups 40f and 40e each having a plurality of blower fans 40 appropriately arranged on the upper and lower sides are respectively formed in the cold air cutoff footnotes 12 and the warmth shutoff footnotes 13 arranged on both sides of the opening airspace 010, respectively. The suction passages 42f and 42e are formed in each of the blocking footnotes 12 and 13 to circulate air.

In addition, in the prior art 3, a plurality of arrangements of the blowing fan 40 are distributed in the first to fourth groups 40a, 40b, 40c, and 40d as shown in FIG. 2 (b). Inlet ports 12b ₁ , 12b ₂ , 13b ₁ , 13b ₂ are formed on the upper and lower sides of 13), and blowout nozzles 12a ₁ , 12a ₂ are provided at the middle of the cold air cutoff foot 12. The ejection nozzles 13a ₁ and 13a ₂ are respectively formed on the upper and lower sides of (13), and may have a structure having suction flow paths 42a, 42b, 42c and 42d.

Figure 12d and 13d as in Reference numeral 2 is an inlet duct, 12d ₁ and 13d ₁ are an upper-side suction duct 12d ₂ And 13d ₂ are the lower side suction ducts, 44 and 45 are the air guide curves, and v is the flow velocity of the air, respectively.

The prior art 3 may correspond to fill the empty space of the air circulation in the opening airspace 010 through the blowout nozzles 12a ₁ and 12a _{2 in the} middle of the cold air cutoff foot 12 shown in FIG. 2 (b). Since each of the blocking footnotes 12 and 13 is integral, the vibration and noise generated by the blower fan 40 are inevitable, and thus, a dustproof structure is not necessarily required, and a variety of people such as a person or a refrigerator vehicle passing through the opening airspace 010 There was a problem that it is difficult to respond broadly to the object.

That is, when the prior art 3 is to be installed in a place where the vertical height of the opening airspace 010 is very high, such as a large refrigerated warehouse, the volume and length of each of the blocking footnotes 12 and 13 itself are also large and can only be enlarged. There was no limit.

 Therefore, the prior art 3 is too bulky to be transported and installed, and in case of failure or abnormality, it is difficult not only to deal with it immediately, but also to raise a cost problem such as having to replace and repair the entire large device.

The present invention has been made in order to solve the above problems, it is possible to prevent the inflow of foreign air and inflow of foreign substances by uniformizing the upper and lower air flow according to the working environment, the air can be stacked in multiple stages up and down easy to check and replace by unit The aim is to provide a curtain unit.

In addition, the present invention is to provide an air curtain unit that can be stacked in a multi-stage up and down that can be easily installed and constructed without restrictions of place and environment.

In order to achieve the above object, the present invention provides an air curtain mounted on an entrance and exit, provided in a unit unit having a plurality of laminated and motor-driven fan assemblies on one side of the left and right sides of the entrance and air by the fan assembly. A front panel provided in each unit unit having a plurality of blowout slits for extracting a plurality of suction holes, and a front panel formed with suction grills parallel to the blowout slits up and down on the other side of the left and right sides of the doorway and having the fan assembly for motor driving; The discharge slits provided on the front panel on one side of the left and right sides of the doorway face each other and the suction grills provided on the front panel on the other side of the left and right sides of the doorway. It can be laminated on the contrary.

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In this case, the unit unit is mounted to each of the unit unit is individually controlled and further provided with a sensor for sensing the object entering and exiting the entrance and exit, the amount of air blown out by the fan assembly according to the object detected by the detection sensor It is desirable to be variable.

The unit unit may be detachably coupled to the front panel including the drawout slit and the suction grill, and includes a unit case in which the fan assembly is built-in; An internal support frame embedded in the unit case to which the fan assembly is detachably coupled; And fixing fasteners for coupling the unit cases adjacent to each other up and down through a plurality of through-holes formed at the same position on the unit case and on the lower surface thereof.

Here, the inner support frame is mounted on the inner side, the lower surface of the unit case, the upper and lower frames for supporting the upper and lower sides of the fan assembly, respectively; At least one vertical frame having both ends coupled to edges of the upper and lower frames, respectively; And a plurality of dustproof holes respectively mounted between the upper and lower surfaces of the unit case and the upper and lower frames, wherein the fan assembly is slidably mounted from the front panel side of the unit case.

According to the present invention having the above configuration, the following effects can be achieved.

First, by adopting a structure that can be stacked in multiple stages up and down on both sides of the entrance and mounted upside down to reverse the unit unit of the shape that can be combined freely up and down to the air circulation to the air flow due to frequent entry and exit of moving objects such as workers and forklifts Compared with the prior art in which disturbance and intrusion of air occur, there is a feature that a film of air curtains can be formed in a vertical direction to completely block intrusion of outside air.

In addition, the present invention is the location of the food processing plant constructed in most suburbs for the convenience of food cultivation and processing, so that the influx of pests and the wind direction changes according to the season so that it is difficult to meet the criteria required by HACCP Even places with conditions have the advantage of being able to proactively cope with changes in the wind direction and blocking the infestation of pests.

In addition, the present invention provides a fan mounted on the inner support frame by mounting the inner support frame through the dustproof port in the unit case as compared with the prior art that gives a sense of discomfort to the worker entering and exiting due to the noise generated by mounting on the upper side of the doorway. By adopting a structure that couples and fastens the assembly to the fixing clamp via the anti-vibration pad, it also has the advantage of increasing durability and reducing vibration and noise.

In addition, the present invention realizes compactness and light weight of the unit unit, so that it can be easily carried out without restriction of installation and construction even in various environments and location conditions, and also has the advantage of immediately identifying the occurrence of abnormalities such as replacement and repair. .

In addition, the present invention can be individually stacked in multiple stages on both sides of the entrance and the air blowing air volume of each of the unit units facing each other and the rotational speed of the drive motor provided in the fan assembly can be controlled individually, It is a very useful invention, such as reducing the air-conditioning load by minimizing the pressure difference.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 and 4 is a view showing an embodiment of the up-down multi-stage stackable air curtain unit according to the present invention, Figure 3 is a perspective view showing an embodiment according to the present invention, Figure 4 is a plan view from the point A of FIG. Each conceptual diagram is shown.

As shown in the present invention by stacking a plurality of unit units (100, 100 ') having a fan assembly (not shown) in each of the left and right sides of the entrance 300 formed in the building wall 500, such as a freezer warehouse, up and down It can be seen that the air is circulated from one side to the other side.

To this end, the plurality of unit units 100 on one side of the left and right sides of the doorway 300 is vertically up and down so that the plurality of unit units 100 'stacked on the other side of the left and right sides of the doorway 300 are opposite to each other. It is preferable to stack, and in the present invention, one side of both left and right sides is defined as 'left', and the other side of left and right sides is defined as 'right'.

In addition, although the present invention is not particularly illustrated, each of the unit unit 100 on the left side of the doorway 300 and the unit unit 100 'on the right side of the doorway 300 may be stacked upside down.

Here, the unit units 100 and 100 ′ are provided in the plurality of unit units 100 stacked on the left side of the doorway 300 and take out slit 152 to blow out air by the fan assembly (not shown); In addition, the front panel 150 having the suction panel 154 parallel to the outlet slit 152 up and down is provided in each of the plurality of unit units 100 ′ stacked on the right side of the doorway 300. ') Are opposed to each other.

The outlet slit 152 provided on the front panel 150 on the left side of the doorway 300 faces the suction grill 154 'provided on the front panel 150' on the right side of the doorway 300. As shown in FIG. 4, the circulation of air, such as an arrow indicated by a dotted line, is made uniformly from left to right and right to left over the upper and lower sides of the doorway 300.

In addition, the unit unit (100, 100 ') is mounted on each of the unit unit (100, 100'), a sensor for detecting the person entering and exit through the doorway 300 and the object such as a forklift and forklift (hereinafter referred to as It is preferable to further provide).

Here, the detection sensor is individually controlled and according to the type of the object entering and exiting the doorway 300, more specifically, the size and height of the fan assembly (not shown) according to the time passing through the doorway 300 The amount of blown air may be varied so that air is blown out along the up and down direction of the entrance 300.

On the other hand, the unit unit 100 according to the present invention, as shown in Figure 5, it can be seen that consisting of a large unit case 110, the inner support frame 120 and the fixing fastener 130.

In FIG. 5, reference numeral 215 denotes a closing plate for allowing air blown out of the fan assembly 200 to be blown out through the takeout slit 152 without leakage, and 216 denotes a guide van, respectively. Since the unit unit 100 ′ has the same configuration as the unit unit 100 on the left side of the doorway 300, description thereof will be omitted.

The unit case 110 has a rectangular cylindrical shape, the front surface of which is opened, and the front panel 150 including the drawout slit 152 and the suction grill 154 is detachably coupled to the fan assembly 200. To provide space for

Here, the unit case 110 is integrally coupled with the inner support frame 120 and the fan assembly 200 to be described later, even if the top and bottom of the unit case 110 is reversed, so that the plurality of upper and lower surfaces can be stacked It is preferable to form a plurality of fastening holes 112 in each.

In addition, the inner support frame 120 is provided in the unit case 110 to provide a place for seating so that the fan assembly 200 is detachably coupled and when the unit case 110 is stacked in multiple stages up and down It also serves to prevent distortion of the unit case 110 and to enable the smooth detachable coupling and replacement of the fan assembly 200, and the upper and lower frames 122 and 124, the vertical frame 126 and It is made of a dustproof port (128).

The upper and lower frames 122 and 124 are mounted on the upper and lower surfaces of the unit case 110, respectively, and serve to support the upper and lower sides of the fan assembly 200, respectively. Guide grooves 122 ′ (see FIG. 6, 124 ′) are respectively cut to form detachable couplings of the fan assembly 200 at positions close to each other.

Here, the upper and lower frames 122 and 124 are respectively supported by the end of the horizontal frame (121, 123) along the detachable coupling direction of the fan assembly 200 to prevent the twist, as shown in the fan The guide piece 125 is preferably mounted at each end of each of the horizontal frames 121 and 123 for the movement guide when the assembly 200 is detached and coupled.

At this time, in the present invention, the horizontal frame 121, 123 is shown as one each coupled to the edge of the upper frame, the lower frame 122, 124, but is not limited to this, the upper, The plurality of lower frames 122 and 124 may be mounted at regular intervals along the length direction.

In addition, the vertical frame 126 has both ends coupled to edges of the upper and lower frames 122 and 124, respectively, and is provided with at least one and is applied upward and downward when the plurality of unit cases 110 are stacked. It will serve to distribute the load.

Here, the vertical frame 126 is divided into upper and lower vertical frames 126 ″ and 126 ″ so as to correspond appropriately to various upper and lower lengths of the fan assembly 200 and the unit case 100 to be mounted. End portions of the vertical frames 126 ″ and 126 ″ may be coupled to the upper and lower frames 122 and 124 by fixing the ends of the length adjusting pieces 126 ′ of various lengths.

In this case, although one vertical frame 126 is illustrated as being mounted between the upper and lower frames 122 and 124 in the present invention, structural reinforcement may be performed by mounting at least one as described above.

In addition, the dustproof holes 128 are mounted between the upper and lower surfaces of the unit case 110 and the upper and lower frames 122 and 124, respectively, to attenuate vibrations according to the driving of the fan assembly 200. Is to reduce the risk.

On the other hand, the fixed fastener 130 according to the present invention, as shown in the upper and lower units of the unit case 110 through the fastening hole 112 formed through a plurality of through the same position on the lower surface of the unit case 110, as shown It serves to couple with each other, in addition to the combination of the bolt 132 and the nut 134 may be implemented by applying a fastening structure of various shapes.

The fixing fastener 130 is, for example, a combination of a butterfly nut and bolt that can be directly fastened and detached by a worker without a separate tool such as a screwdriver or a spanner, or a plurality of locking bones are formed on the bolt head. Various modifications and applications are possible such as to facilitate gripping and fastening.

Here, the fastening holes 112 may be formed at the same position on the lower surface of the unit case 110 so that the unit case 110 is not inverted even when the unit case 110 is laminated and coupled in multiple stages.

Meanwhile, both ends of the fan assembly 200 are fixedly supported by fixing clamps 250 which are both ends of which are fixed to the edges of the upper and lower frames 122 and 124, respectively, and both ends of the fan assembly 200. A plurality of dustproof pads 260 mounted at predetermined intervals are further provided between the fixing clamps 250 to attenuate the vibration of the fan assembly 200 together with the dustproof holes 128 to reduce noise. Will be

Hereinafter, the main parts of the present invention will be described in more detail, and reference numerals indicating components and respective components not shown in the following drawings will be described with reference to FIG. 5.

In the inner support frame 120 according to the present invention, it can be seen that both ends of the vertical frame 126 are coupled to the edges of the upper and lower frames 122 and 124, respectively, as shown in FIG. It can be seen that the torsion preventing piece 127 is further provided to interconnect and fix the edges of the upper and lower frames 122 and 124 and both ends of the vertical frame 126.

The torsion preventing piece 127 serves to reduce twisting of the inner support frame 120 and the unit case 110 to one side due to the driving according to the one-way rotation of the fan assembly 200.

Meanwhile, in FIG. 6, it can be seen that the dustproof outlet 128 is mounted at the edges of the upper and lower frames 122 and 124, and the dustproof outlet 128 according to the present invention is largely supported as shown in FIG. 7. It can be seen that it consists of a bracket 128 'and a dustproof body 128 ".

A plurality of support brackets 128 'are mounted at positions corresponding to edges of the upper and lower frames 122 and 124 on the inside and the bottom of the unit case 110, and the dustproof body 128' is supported. It is made of an elastic material such as rubber or synthetic rubber having both ends of the bracket 128 'and fastening rods 129 coupled to the edges of the upper and lower frames 122 and 124, respectively.

On the other hand, the fan assembly 200 according to the present invention is composed of the assembly body 210, the fan drive motor 220 and the vertical fan 230 largely as shown in FIG.

Both ends of the assembly body 210 are slidably detachably coupled to the upper and lower frames 122 and 124, respectively (see FIG. 5), and the discharge opening 212 toward the front panel 150 as shown in FIG. 8 (b). ) Is formed in the vertical direction.

Here, both ends of the assembly body 210 are coupled to the upper and lower frames 122 and 124 by the fixing clamp 250 described above, and the air blown out from the discharge port 212 is the front panel 150. A finish plate 215 is formed in the vicinity of the discharge port 212 in order to be discharged without leaking through the extraction slit 152.

In addition, the fan driving motor 220 is mounted at the central portion of the assembly body 210 and rotates in one direction, and includes driving shafts 222 integrally rotating in parallel with the vertical direction of the assembly body 210 at both ends. In one embodiment, the vertical fan 230 is coupled to both ends of the drive shaft 222.

The vertical fan 230 has one end coupled to the drive shaft 222 of the fan drive motor 220 as shown in FIG. 8A, and the other end of the vertical fan 230 has an inner upper and lower surface and a bearing 240. Each one has a predetermined length up and down that is rotatably coupled.

Here, the vertical fan 230 may use any fan blade having a shape, and it is preferable to use a sirocco fan that generates relatively little noise and has a low air conditioning load.

At this time, the assembly body 210 further includes a discharge guide plate 214 which is formed in parallel in the vertical direction of the discharge port 212 and both ends are rotatably coupled to be taken out from the vertical fan 230. It is also possible to adjust the wind direction of the air.

Air curtain unit that can be stacked in a multi-stage up and down according to the present invention of the configuration as described above by stacking a plurality of unit units 100 according to the present invention on both sides of the doorway 300 on the left and right sides corresponding to the height of the doorway (300) The air flow is disturbed by the space of the air circulation along the up and down direction of the entrance and exit 300, for example, a forklift truck or a freezer, so that the amount of blown air is blown out individually at the place where the inflow of outside air and the inflow of foreign substances such as pests are concerned. Mounting the fan assembly 200 may reduce the disturbance of the airflow.

In addition, the present invention may be installed in the unit unit 100 inverted up and down as shown in Figure 9 to face each other to block the outside air and insect repellent, such as a freezer warehouse constructed in a place where the wind direction changes depending on the season have.

That is, according to the present invention, as shown in FIG. 9 (a), the wind (w) is formed at a location in which the entrance (300) facing the wind (w) blowing from the outdoor (510) to the indoor (520) side is inclined from right to left. Unit units 100 and 100 ′ may be installed at both sides of the entrance 300 of the building wall 500 to correspond to the wind direction.

Here, the air b is blown out to the unit unit 100 on the left side of the doorway 300 through the blowout slit 152 'provided in the unit unit 100' on the right side of the doorway 300, and left of the doorway 300. By taking out the air (a) in the mutually opposite direction through the blowout slit 152 provided in the unit unit of 100 to form a natural air circulation path (c) in the wind (w) of the wind direction as described above Insect repellent becomes possible.

Then, the present invention is inclined from the left to the right as shown in Fig. 9 (b) when facing the wind (w ') blowing from the outdoor 510 to the indoor 520 side unit units (100, 100) on both sides of the entrance (300) ') Can also be mounted upside down, that is, rotated 180 degrees at each installed location.

Therefore, in the present invention, the air a 'is blown out from the unit unit 100 on the left side of the doorway 300, and the air b' is blown out from the unit unit 100 'on the right side of the doorway 300. By forming (c '), it is possible to block and protect the outside air.

As described above, the present invention is provided with a sensor in each of the unit units (100, 100 '), the size and height of the person entering and exiting through the doorway 300 and the object, such as a forklift and forklift, and the doorway (300) The amount of blown air of the fan assembly 200 may be varied according to the time passing through the fan.

That is, the sensing sensor has a height in the vertical direction, such as a refrigeration car, and when the object has a long passage time passes through the doorway 300, the object is connected to the doorway by a controller (not shown) electrically connected to the sensor. Increasing the number of revolutions of the fan assembly built into each of the unit units (100, 100 ') on both sides of the doorway 300 to increase the wind speed and air volume of the blown air until it passes completely through Will block.

And, when the object having a relatively low height as compared to the refrigerator vehicle, such as a forklift truck passes through the doorway 300, the detection sensor from the lower unit unit (100, 100 ') than the upper side of the doorway (300) It is possible to maintain the air curtain capacity by increasing the air velocity and volume of air to be blown out.

In addition, the unit units 100 and 100 ′ according to the present invention may be mounted on both sides of the doorway 300, respectively, or may be disposed in a plurality of rows in a multi-stage stacking arrangement up and down on only one side of both sides of the doorway 300. Multiple layers of a barrier film formed by air blown out of the air may be formed to block inflow of outside air and inflow of foreign substances.

As described above, the present invention makes it possible to uniformize the upper and lower air flows according to the working environment to prevent the blocking of outside air and the inflow of foreign substances, and to easily check and replace the units, as well as to easily install and install the construction without restriction of place and environment. It is understood that the basic technical idea is to provide an air curtain unit that can be stacked in multiple stages.

In addition, within the scope of the basic technical idea of the present invention, a person having ordinary knowledge in the industry and an area where the temperature of the room is constantly changed or the place where the temperature of the room changes constantly while the entrance and exit of the vehicle and the vehicle are frequent, and Many other modifications and applications are possible, such as in the areas where pests and dust are scattered, and stacked up and down in an appropriate number on both sides of the entrance to face each other, or frequently installed upside down.

1 and 2 is a conceptual diagram showing the overall configuration of a conventional air curtain

3 and 4 is a view showing an embodiment of the up-down multi-stage stackable air curtain unit according to the present invention

5 is an exploded perspective view showing the overall configuration of a unit unit which is a main part of the present invention;

FIG. 6 is a conceptual diagram illustrating a configuration of an internal support frame, which is an essential part of the present invention, as seen from the point C of FIG. 5.

7 is a conceptual diagram showing the configuration of the anti-vibration apparatus according to the present invention seen from the point D of FIG.

FIG. 8 is a conceptual view illustrating a configuration of a fan assembly according to the present invention seen from the section B-B 'of FIG. 5 and point E. FIG.

9 is a conceptual diagram showing an embodiment of the application of the present invention

* Description of the symbols for the main parts of the drawings *

100 ... unit unit 110 ... unit case

120 ... internal support frame 122 ... upper frame

124 ... lower frame 126 ... vertical frame

128 ... Vibration Proof 130 ... Fixed Fastener

200 ... fan assembly 210 ... assembly body

220 ... fan drive motor 230 ... vertical fan

250 ... clamp clamp 260 ... dustproof pad

Claims (11)

In the air curtain attached to the doorway 300, A slit 152 which is provided in a unit unit 100 having a plurality of stacked and motor-driven fan assemblies 200 mounted on one side of both left and right sides of the doorway 300 to blow out air by the fan assembly 200. And a plurality of front panels 150 having upper and lower suction grills 154 parallel to the outlet slit 152 stacked on the other side of the left and right sides of the doorway 300 to drive the fan assembly 200. It is opposed to the front panel 150 'provided in each of the built-in unit unit (100'), The suction slit 152 provided on the front panel 150 on one side of the left and right sides of the entrance 300 is a suction grill 154 'provided on the front panel 150' on the other side of the left and right sides of the entrance 300. Against each other), The unit unit (100, 100 ') is a vertically and multi-stage stackable air curtain unit, characterized in that can be stacked upside down respectively. delete The method of claim 1, In the unit unit (100, 100 '), It is mounted to each of the unit units (100, 100 ') and individually controlled, and further provided with a sensor for detecting the object entering and exiting the doorway 300, Up and down multi-stage stackable air curtain unit, characterized in that the amount of air blown out by the fan assembly 200 is variable according to the object detected by the detection sensor. The method of claim 1, The unit unit 100, A unit case 110 in which the front panel 150 including the takeout slit 152 and the suction grill 154 is detachably coupled and the fan assembly 200 is built-in; An internal support frame 120 embedded in the unit case 110 to which the fan assembly 200 is detachably coupled; And It characterized in that consisting of; fastening holes 130 for coupling the upper and lower adjacent unit case 110 through a plurality of through holes 112 formed in the same position on the lower surface of the unit case 110; Air curtain unit that can be stacked in multiple stages. The method of claim 4, wherein The inner support frame 120, Upper and lower frames 122 and 124 mounted on upper and lower surfaces of the unit case 110 to support upper and lower sides of the fan assembly 200, respectively; At least one vertical frame 126 having both ends coupled to edges of the upper and lower frames 122 and 124, respectively; And And a plurality of dustproof holes 128 mounted between the upper and lower surfaces of the unit case 110 and the upper and lower frames 122 and 124, respectively. The fan assembly 200 is stacked up and down multi-stage air curtain unit, characterized in that the slide is mounted from the front panel 150 side of the unit case 100. The method of claim 5, wherein In the upper and lower frames 122 and 124, Guide grooves which are interconnected to the vertical frame 126 and are cut in the edges of the upper and lower frames 122 and 124 adjacent to the front panel 150 so that the fan assembly 200 is slidably detachable. Air curtain unit that can be stacked in multiple stages, characterized in that each of the (122 ', 124') is provided. The method of claim 6, In the vertical frame 126, The upper and lower frames (122, 124) and the upper and lower multi-stage stackable air curtain unit, characterized in that the torsion prevention piece (127) for further fixing the two ends of the vertical frame (126) interconnected. The method of claim 5, wherein The dustproof port 128, A plurality of support brackets 128 'mounted at positions corresponding to edges of the upper and lower frames 122 and 124 on the inner and lower surfaces of the unit case 110; And And an anti-vibration body 128 "of elastic material having both ends of the support bracket 128 'and fastening rods 129 coupled to edges of the upper and lower frames 122 and 124, respectively. Air curtain unit that can be stacked in multiple stages. The method of claim 5, wherein The fan assembly 200, An assembly body 210 having both ends slidably coupled to the upper and lower frames 122 and 124, respectively, and having discharge ports 212 formed in the vertical direction toward the front panel 150; A fan drive motor 220 mounted to a central portion of the assembly body 210 and having a driving shaft 222 which is integrally rotated in parallel with the vertical length of the assembly body 210 at both ends, respectively; And A vertical fan 230 having one end coupled to the drive shaft 222 of the fan drive motor 220 and the other end rotatably coupled to the inner and upper and lower surfaces of the assembly body 210; Air curtain unit that can be stacked in multiple stages, characterized in that made. The method of claim 9, Both ends of the fan assembly 200, Both ends of the upper and lower frames 122 and 124, the upper and lower multi-stage stackable air curtain unit, characterized in that the fixing clamp 250 is fixed to each of the edges of the fixed. The method of claim 10, Between both ends of the fan assembly 200 and the fixing clamp 250, Up and down multi-stage stackable air curtain unit, characterized in that it is further provided with a plurality of dustproof pads 260 mounted at a predetermined interval.

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