Patent Abstract:
A louver module which has an improved ventilation control structure, operating method, material, and shape for imparting heat-resistance and water-tight properties and prevents a louver from deviating through mutual fixation and reinforcement among a plurality of materials, and a louver system employing the same. The louver module of includes a frame, an opening/closing mechanism, a louver unit and power transmission mechanism.

Full Description:
CROSS REFERENCE TO PRIOR APPLICATIONS 
     This application is a National Stage Patent Application of PCT International Patent Application No. PCT/KR2011/001928 (filed on Mar. 21, 2011) under 35 U.S.C. §371, which claims priority to Korean Patent Application No. 10-2010-0059265 (filed on Jun. 22, 2010) which are all hereby incorporated by reference in their entirety. 
     TECHNICAL FIELD 
     The present invention relates to a louver module and a louver system employing the same, and more particularly, to a louver module which has an improved ventilation control structure, operating method, material, and shape for imparting heat-resistance and water-tight properties and prevents a louver from deviating through mutual fixation and reinforcement among a plurality of materials, and a louver system having the louver module coupled to a window chassis or door chassis. 
     BACKGROUND ART 
     A louver module is devised to screen the sun while reducing visual exposure to the exterior in a place where ventilation is frequently required, to prevent rainwater from flowing into the place in case of rain, and to ensure the ventilation. 
     In a case where the louver module is of a fixed type, the louver module of the fixed type is configured to be inclined at an angle of 40 to 50 degrees. The inclined angle of the louver is changed depending on an installation purpose or situation of the louver module. The louver module is generally installed in a place where ventilation is required, such as a machine room, parking lot or factory wall. 
     There has been developed an openable/closable louver module by improving a conventional louver module to be of a rotary type. The openable/closable louver module of the rotary type has excellent sealing performance and ventilation characteristics as compared with the conventional louver module of the fixed type. 
     The louver module of the rotary type is frequently installed in a place where a boiler in an apartment building, studio apartment or complex building are mounted or in a place where an outdoor unit of an air conditioner is mounted. 
     However, in the louver module of the rotary type, a louver and a frame are generally made of an aluminum material, and therefore, its heat-resistance effect is lowered. In a case where the temperature difference between the interior and exterior of a room is large, a dew condensation phenomenon occurs, and therefore, walls of the room are contaminated due to the formation of mold in the room. 
     Further, the conventional louver module of the rotary type has a problem in that sufficient water-tight properties between louvers are not ensured, and therefore, rainwater flows into the room. 
     Further, in the conventional louver module of the rotary type, a driving mechanism for rotating the louvers is structurally weak, and therefore, the locking state of the louvers is released or some of the louvers are deviated by a malfunction or external impact. 
     DETAILED DESCRIPTION 
     Technical Problems 
     It is thus an object of the present invention to provide a louver module having a rotatably openable/closable louver, in which a louver is configured to be made of a material having heat resistance, such as synthetic resin, and to include compartments in which several air layers are formed, so that it is possible to ensure the heat resistance and to prevent the occurrence of a dew condensation phenomenon even when the temperature difference between the interior and exterior of a room is large. 
     It is another object of the present invention to provide a louver module which can perform smooth ventilation when louvers are opened, ensure sealing performance between the louvers when the louvers are closed, and prevent rainwater from flowing into the interior of a room between the louvers and frames. 
     It is still another object of the present invention to provide a louver module in which a driving force is transmitted to a louver using a manual or electric worm gear, so that it is possible to perform a fine manipulation of the louver and to prevent an opening/closing of the louver from being changed by an external impact. 
     It is still another object of the present invention to provide a louver module in which louvers are firmly coupled to a frame by improving the structure of the louvers, so that it is possible to prevent a phenomenon that the louver is deviated or bent. 
     It is still another object of the present invention to provide a louver system in which the louver module is coupled to a window chassis or door chassis for ventilation, lighting and entrance. 
     Technical Solutions 
     To solve the objective, the present invention provides a louver module, including: a frame having horizontal and vertical frames assembled in a rectangular shape; an opening/closing mechanism assembled with any one of the vertical frames so as to provide torque using worm gears; a louver unit made of a synthetic resin material and including a plurality of louvers each having a compartment forming an air layer for heat resistance therein, wherein symmetrically-shaped brackets are respectively coupled to both ends in the length direction of the respective louvers, a reinforcing beam extended in the length direction is assembled inside each louver, at least one surface of outer surfaces of each louver has a streamline shape, and the plurality of louvers are rotatably mounted between the vertical frames constituting left and right sides of the frame while being horizontally spaced apart in vertical direction from one another; and a power transmission mechanism including a plurality of holders respectively disposed at positions corresponding to end portions of the louvers inside the vertical frames constituting the frame and a pair of shafts disposed inside each vertical frame, wherein each holder has one surface on which a fixing projection is formed and the other surface on which a pair of link projections are formed, the fixing projection of the holder is coupled to the end portion in the length of the reinforcing beam by passing through the vertical frame and the bracket, corresponding to the position of the fixing projection, the link projections of each holder are linked with the respective shafts, and the end portions of the pair of link projections of a specific holder corresponding to the mounting position of the opening/closing mechanism are mounted to the opening/closing mechanism by passing through the linked shafts, wherein the torque is transmitted to the specific holder from the opening/closing mechanism, the pair of shafts are driven in opposite directions to each other by rotation of the specific holder so that the torque is transmitted to other holders, as the holders inside the vertical frame forming one side of the frame are rotated, the torque is transmitted to the louver to be rotated, the holders inside the vertical frame forming the other side of the frame are rotated in connection with the rotation of the louvers coupled to the respective holders, and the pair of shafts inside the vertical frame forming the other side of the frame, which are linked with the holders, are driven in opposite directions to each other. 
     The opening/closing mechanism may include a driving mechanism providing an original driving force; a worm gear including a worm rotated by the original driving force transmitted from the driving mechanism and a first wheel tooth-combined with the worm  204  so as to generate the torque in a direction vertical to the original driving force; and a second wheel shaft-coupled to the first wheel of the worm gear so as to be rotated by receiving the torque transmitted from the first wheel, and coupled to the pair of link projections of the holder at a position corresponding to the second wheel. 
     The driving mechanism may include a knob shaft-coupled to the worm and rotated by a user&#39;s hand. 
     The driving mechanism may include an electric motor rotated by a user&#39;s manipulation and shaft-coupled to the worm. 
     The louver unit may further include. 
     The bracket of the louver unit may further include fixed louvers respectively coupled to uppermost and lowermost portions of the frame in a state corresponding to the state in which the louver is closed. 
     The bracket of the louver unit may further include at least one of a wedge and a fixing screw, which are coupled to an end portion in the length direction of the louver by passing through the bracket. 
     The louver may be coupled to the frame so that the streamline-shaped surface of the louver becomes an outer surface, each of the brackets respectively coupled to both ends in the length direction of the louver may further include a beak that comes in contact with a short edge formed on the vertical frame contacting the bracket in the state in which the louver is closed while being extended downward along the streamline-shape surface of the louver, and rainwater may be guided to the streamline-shaped surface of another louver positioned beneath the louver by the beak in the state which the louver is closed so as to prevent the rainwater from flowing in the interior. 
     A gasket may be further inserted into the louver so as to be parallel with the other surface of the louver, which contacts the streamline-shaped surface of another louver disposed beneath the louver in the state in which the louver is closed. 
     To solve the objective, the present invention provides a louver system, including: the louver module; and a chassis supporting the louver module to be rotatably opened/closed. 
     The chassis may support the louver module to be rotatably opened/closed using the horizontal or vertical direction as an axis. 
     The chassis may be assembled with the louver module to be rotatably opened/closed using the horizontal or vertical as the axis, and the chassis may be coupled to a window or door having a sliding opening/closing function or a hinged opening/closing function. 
     The chassis may be fixed and coupled to an external chassis. 
     Advantageous Effects 
     Based on the above structure, in the louver module having louvers of a rotary type, a louver is configured to be made of a material having heat resistance, such as synthetic resin, and to include compartments in which several air layers are formed, so that it is possible to ensure the heat resistance and to prevent the occurrence of a dew condensation phenomenon even when the temperature difference between the interior and exterior of a room is large. 
     Further, at least one surface of the louver is formed in a streamline shape, so that it is possible to perform smooth ventilation when the louvers are opened, ensure sealing performance between the louvers when the louvers are closed, and prevent rainwater from flowing into the interior of a room between the louvers and frames. 
     Further, a driving force is transmitted to the louver using a manual or electric worm gear, so that it is possible to perform a fine manipulation of the louver and to prevent an opening/closing of the louver from being changed by an external impact. 
     Further, the louvers are firmly coupled to a frame by improving the structure of the louvers, so that it is possible to prevent a phenomenon that the louver is deviated or bent. 
     Further, the louver system for various windows and doors can be implemented by coupling the louver module to various kinds of chassis such as window and door chassis for ventilation, lighting and entrance. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view illustrating an embodiment of a louver module according to the present invention; 
         FIG. 2  is a front view of  FIG. 1 ; 
         FIG. 3  is a left side view of  FIG. 1 ; 
         FIG. 4  is a right side view of  FIG. 1 ; 
         FIG. 5  is a rear view of  FIG. 1 ; 
         FIG. 6  is a perspective view of a louver unit; 
         FIG. 7  is a side view illustrating the structure of an embodiment of a louver; 
         FIG. 8  is a side view illustrating the structure of another embodiment of the louver; 
         FIG. 9  is an enlarged perspective view of portion A of  FIG. 6 ; 
         FIG. 10  is an enlarged perspective view of portion B of  FIG. 6 ; 
         FIG. 11  is a perspective view of a reinforcing beam; 
         FIG. 12  is an enlarged perspective view of portion C of  FIG. 11 ; 
         FIG. 13  is a perspective view of a gasket; 
         FIG. 14  is an enlarged view of portion D of  FIG. 11 ; 
         FIG. 15  is a perspective view of a bracket; 
         FIG. 16  is a left side view of the bracket; 
         FIG. 17  is a right side view of the bracket; 
         FIG. 18  is a side view illustrating a state in which an upper fixing louver of the louver unit and an upper horizontal frame are coupled to each other; 
         FIG. 19  is a side view illustrating a state in which a lower fixing louver of the louver unit and a lower horizontal frame are coupled to each other; 
         FIG. 20  is an exploded perspective view of a vertical frame; 
         FIG. 21  is an exploded perspective view illustrating a configuration a power transmission mechanism inside the vertical frame; 
         FIG. 22  is a perspective view illustrating the vertical frame and an opening/closing mechanism coupled to the vertical frame; 
         FIG. 23  is an enlarged view of portion E; 
         FIG. 24  is an enlarged perspective view illustrating a state in which a main vertical frame is removed from the portion E; 
         FIG. 25  is an enlarged perspective view of the opening/closing mechanism in a state in which a side vertical frame is removed and a case is opened; 
         FIG. 26  is a schematic view illustrating a link state between the louver and a shaft in a state in which the louver is closed; 
         FIG. 27  is a schematic view illustrating a link state between the louver and the shaft in a state in which the louver is semi-opened; 
         FIG. 28  is a schematic view illustrating a link state between the louver and the shaft in a state in which the louver is completely opened; 
         FIG. 29  is a perspective view illustrating an embodiment of a louver system, which illustrates a state in which the louver system is coupled to a chassis in a state in which the louver module is closed; and 
         FIG. 30  is a perspective view illustrating an embodiment of the louver system, which illustrates a state in which the louver system is coupled to the chassis in a state in which the louver module is opened. 
     
    
    
     MODES FOR PRACTICING INVENTION 
     The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown. This invention should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, like numbers refer to like elements throughout. 
       FIG. 1  is a perspective view illustrating an embodiment of a louver module according to the present invention.  FIGS. 2 to 5  are front, left side, right side and rear views of the embodiment, respectively. 
     In the louver module according to the embodiment of the present invention, a louver unit  12  is assembled in a rectangular frame  10 . 
     Here, the frame  10  includes horizontal frames  14  and  15  and vertical frames  16  and  17 , which are made of a synthetic resin material. The horizontal frames  14  and  15  and the vertical frames  16  and  17  are assembled into a rectangular shape. The assembled horizontal and vertical frames  14 ,  15 ,  16  and  17  are inserted into a window chassis or door chassis and are screened from the exterior, thereby ensuring heat resistance. The horizontal and vertical frames  14 ,  15 ,  16  and  17  are preferably made of a material having heat resistance, such as a synthetic resin material. 
     An opening/closing mechanism  18  is mounted to the vertical frame  16 . The opening/closing mechanism  18  is used to drive the louver unit  12  by providing torque using worm gears described later. 
     Louvers  20  that occupy most of the area of the louver module according to the embodiment of the present invention are made of a synthetic resin material, and have a structure including a compartment for forming an air layer that acts as a buffer for heat resistance. Therefore, the louver module according to the embodiment of the present invention has heat resistance according to the material and structure of the louvers  20 . That is, since the heat resistance of the synthetic resin material is generally superior to that of the aluminum material, the louvers  20  do not conduct external cool or warm air to the interior. The structure of the louvers  20  will be described later with reference to  FIGS. 7 to 10 . 
     When considering that the louver module according to the embodiment of the present invention is installed in a place where a boiler in an apartment building, studio apartment or complex building are mounted or in a place where an outdoor unit of an air conditioner is mounted, cooling and heating efficiency can be enhanced by the heat resistance of the frame  10 , the louvers  20  and components constituting the louver module and a louver system employing the same. The components constituting the louver module and the louver system are preferably made of a heat-resistance material such as a synthetic resin material, in consideration of the heat resistance. 
     As described above, the frame  10  and the louver unit  12  has high heat resistance because of their material characteristics, so that it is possible to prevent a dew condensation phenomenon when the temperature difference between the interior and exterior of a room is large. 
     As configured in  FIGS. 1 to 5 , the louver unit  12  includes the louvers  20  and symmetrically-shaped brackets  22  coupled to both ends in the length direction of the respective louvers  20 . 
     The louver unit  12  receives torque transmitted from the opening/closing mechanism  18  described later, and the louvers  20  are opened/closed by being rotated by the torque. Thus, louver unit  12  performs operations of opening the louvers  20  for the purpose of ventilation and closing the louvers  20  so as to prevent the ventilation from the exterior. The opening/closing of the louvers  20  is performed by being rotated by the torque transmitted from the opening/closing mechanism  18 . 
     As shown in  FIGS. 6 to 10 , the louver  20  of the louver unit  12  has a streamline-shaped surface, and the louver unit  12  includes fixed louvers  20   a  and  20   b  respectively formed at upper and lower portion thereof. The louvers  20  are horizontally spaced apart in vertical direction from one another between the fixed louvers  20   a  and  20   b.    
     The louver  20  has a streamline-shaped surface disposed toward the exterior when being mounted, and has a structure in which a bottom end in the width direction of one louver  20  is engaged with a top end in the width direction of another louver  20  in a state in which the one louver  20  is closed. A surface opposite to the streamline-shaped surface of the louver  20  may has a flat structure so as to form a flat vertical surface with respect to surfaces of other louvers disposed adjacent to the louver  20 . 
     A compartment  20   d  for buffering both surfaces of the louver  20  using an air layer in the interior thereof is formed inside the louver  20 . Wedge grooves  20   h  and fixing screw grooves  20   c  are formed at upper and lower portions of the compartment  20   d , respectively. The interior of the compartment  20   d  is preferably formed to have a space into which a reinforcing beam  24  having a shape shown in  FIGS. 11 and 12  is inserted and to have projections  20   e  for supporting the reinforcing beam  24 , protruded from the interior of the compartment  20   d . A recessed portion into which a projection  26   a  of a gasket  26 , which has a shape shown in  FIGS. 13 and 14 , is formed at one end of the louver  20 . 
     A reinforcing compartment  20  for forming an air layer may be configured in various shapes at each portion of the louver  20 . As shown in  FIG. 7  or  8 , various reinforcing compartments may be formed in the louver  20 , in consideration of the heat-resistance effect, etc. Meanwhile, in  FIG. 8 , reference numeral  185  denotes a fixing screw for illustrating a state in which the fixing screw  185  is coupled to the fixing screw groove  20   c.    
     Hereinafter, the louver  20  configured according to the embodiment of the present invention is illustrated as one configured in an embodiment of  FIG. 7 . However, the louver  20  configured in an embodiment of  FIG. 8  may be applied according to a manufacturer&#39;s intention.  FIGS. 7 and 8  illustrate louvers in which the structure of the reinforcing compartment  20   f , etc. is modified in consideration of the heat-resistance effect as described above. 
     The reinforcing beam  24  having the shape shown in  FIGS. 11 and 12  is assembled to the interior of the louver  20 . The reinforcing beam  24  is provided with a fixing port  24   a  that has a shape extended in the length direction thereof and is inserted into the louver  20  so as to receive torque while being rotated together with the louver  20 . A fixing projection of a holder, which will be described with reference to  FIGS. 20 to 22 , is inserted into the fixing port  24   a.    
     The reinforcing beam  24  is inserted into the louver  20 , so that it is possible to prevent a phenomenon that the louver  20  is bent due to strong wind pressure or physical environment applied from the exterior. The reinforcing beam  24  may be configured as a beam made of high-strength synthetic resin or metal such as aluminum. 
     The gasket  26  is inserted into the louver  20  so as to be parallel with the other surface of the louver  20 , which contacts the streamline-shaped surface of another louver  20  disposed beneath the louver  20  in a state in which the louver  20  is closed. As shown in  FIGS. 13 and 14 , the gasket  26  has a shape extended in the length direction thereof, and is provided with an arrowhead-shaped projection  26   a  inserted into the recessed groove formed in the surface of the louver  20 . The projection  26   a  is extended in the length direction of the gasket  26 . 
     The gasket  26  is mounted at an end portion in the width direction of the louver  20 , so that the sealing performance of the louver  20  can be ensured by the gasket  26  in a state in which the louver  20  is closed to be engaged with another louver  20 . That is, inflow/outflow of a fine draft of air, inflow/outflow of cool or warm air, inflow of moisture, etc. can be blocked by the gasket  26 . To this end, the gasket  26  may be formed of a synthetic rubber material such as an ethylene propylene dienimethylene linkage (EPDM), which has no change in temperature and no deformation caused by ultraviolet light. 
     The symmetrically-shaped brackets  22  are coupled to both the ends in the length direction of the respective louvers  20 . The bracket  22  can be described with reference to the perspective view, the perspective, left side and right side views of  FIGS. 15 to 17 . The bracket  22  may be made of a synthetic resin material. 
     The bracket  22  is provided with holding portions  22   a  and  22   b  protruded on one surface so as to hold an end portion in the length direction of the louver  20 . 
     The bracket  22  has a beak  22   c  that comes in contact with a short edge ( 160  of  FIG. 20 ) formed at a side of each vertical frame  16  or  17  contacting the louver  20  in the state in which the louver  20  is closed while being extended downward along the streamline-shaped surface of the louver  20 . As the beak  22   c  comes in contact with the short edge  160  of each vertical frame  16  or  17 , the flow of rainwater is induced to the streamline-shaped surface of another louver  20  disposed beneath the louver  20  in the state in which the louver  20  is closed. That is, the beak  22   c  can prevent exterior rainwater from flowing between the louver  20  and each vertical frame  16  or  17 . 
     A holder hole  22   d  which a fixing projection  182   b  of a holder  180 , which will be described later with reference to  FIGS. 20 to 22 , passes through is formed at the center of the bracket  22 . Wedge holes  22   e  and  22   f  which will be described later with reference to  FIGS. 20 to 22  are formed in a region adjacent to the holder hole  22   d . Fixing screw holes  22   g  and  22   h  are formed adjacent to the wedge holes  22   e  and  22   f , respectively. 
     Meanwhile, as shown in  FIG. 18 , the horizontal frame  14  is assembled at an upper portion of the fixed louver  20   a  disposed at the upper portion of the louver unit  12 , and the horizontal frame  15  is assembled at a lower portion of the fixed louver  20   b  disposed at the lower portion of the louver unit  12 . 
     Referring to  FIG. 18 , the upper portion of the fixed louver  20   a  is inserted into a clipping horizontal frame  146 . Projections may be formed on an inner wall of the clipping horizontal frame  146  so as to support the coupling state with the fixed louver  20   a  inserted into the clipping horizontal frame  146 , and a support  146   b  for maintaining the coupling state with a main horizontal frame  144  may be formed on an outer wall of the clipping horizontal frame  146 . 
     The main horizontal frame  144  has an upwardly opened channel and a downwardly opened channel. The clipping horizontal frame  146  is inserted into the downwardly opened channel of the main horizontal frame  144 , and the upwardly opened channel of the main horizontal frame  144  is closed by being coupled to a cover horizontal frame  142 . 
     Here, a short edge formed at an end portion of the upwardly opened channel of the main horizontal frame  144  is fastened with a short edge formed on a bottom surface of the cover horizontal frame  142 , so that the assembling state between the main horizontal frame  144  and the cover horizontal frame  142  can be supported. In addition, a short edge formed at an end portion of the downwardly opened channel of the main horizontal frame  142  is fastened with the support  146   b  formed on the outer wall of the clipping horizontal frame  146 , so that the assembling state between the main horizontal frame  144  and the clipping horizontal frame  146  can be supported. 
     Referring to  FIG. 19 , the lower portion of the fixed louver  20   b  is also coupled to a clipping horizontal frame  156  of the horizontal frame  15 , and the horizontal frame  15  having the same structure as the horizontal frame  14  as described in  FIG. 18  is coupled to the fixed louver  20   b . Thus, the coupling structure of the clipping horizontal frame  156 , the main horizontal frame  154  and the cover horizontal frame  152  can be described with reference to  FIG. 19 , and its detailed description will be omitted to avoid redundancy. 
     The fixed louvers  20   a  and  20   b  of  FIGS. 18 and 19  are illustrated as ones applied by partially cutting away the upper and lower ends of the louvers  20  shown in  FIGS. 7 and 8 . Any one of the louver  20  according to the embodiment of  FIG. 7  and the louver  20  according to the embodiment of  FIG. 8  may be selected as the fixed louvers  20   a  and  20   b.    
     The configuration of the vertical frames  16  and  17  will be described with reference to  FIGS. 20 and 21 . 
     The vertical frames  16  and  17  are coupled to the bracket  22  coupled to the louvers  20 . Each vertical frame  16  or  17  includes a cover vertical frame  172 , a main vertical frame  174  and a side vertical frame  176 . A pair of shafts  180   a  and  180   b  and holders  182  corresponding to the respective brackets  22  are included between the main vertical frame  174  and the cover vertical frame  172 . Here, the holder  182  and the pair of shafts  180   a  and  180   b  are included in a power transmitting mechanism. 
     First, a pair of wedges  184  passing through the bracket  22  are inserted into the wedge grooves  20   h  of the louver  20  through the wedge holes  22   e  and  22   f , respectively. A pair of fixing screws  185  passing through the fixing screw grooves  22   g  and  22   h  of the bracket  22  are inserted into the fixing screw grooves  20   c  of the louver  20 , respectively. Accordingly, the bracket  22  and the louver  20  can have a firm fixing structure through the coupling using the wedges  184  and the fixing screws  185 , and the wedges  184  and the fixing screws  185  can prevent the louver  20  from being deviated from the holder  182  due to an external impact. 
     The coupling between the cover vertical frame  172  and the main vertical frame  174 , which constitute each vertical frame  16  or  17  may be implemented to have the same structure as the coupling between the horizontal frame  144  or  154  and the cover horizontal frame  142  or  152 . The main vertical frame  174  and the side vertical frame  176  may also has a structure in which short edges of the main vertical frame  174  and the side vertical frame  176  are engaged with each other so as to support the coupling state between the main vertical frame  174  and the side vertical frame  176 . 
     A fixing projection  182   b  is formed on one surface of the holder  182 , and a pair of link projections  182   a  are formed on the other surface of the holder  182 . 
     The fixing projection  182   b  of the holder  182  is fixed to the bracket  22  by being inserted into the fixing port  24   a  of the reinforcing beam  24  in the louver  20  while passing through a through-hole formed in the main vertical frame  174 , a through-hole  176   a  formed in the side vertical frame  176  and the holder hole  22   d  formed in the bracket  22 . 
     The pair of link projections  182   a  of the holder  182  may be rotatably linked to each shaft  180   a  or  180   b  while passing through each shaft  180   a  or  180   b . If the shaft  180   a  is ascended by the linkage described above, the shaft  180   b  is descended, and accordingly, the holders  182  respectively disposed in the vertical frames  16  and  17 , which form one sides linked with the shafts  180   a  and  180   b , can be linked and rotated. 
     The opening/closing mechanism  18  may be mounted to any one of the vertical frames  16  and  17  described above. Although it has been illustrated in the embodiment of the present invention that the opening/closing mechanism  18  is mounted to the vertical frame  16  constituting a left side of the frame  10 , the opening/closing mechanism  18  may be mounted to the vertical frame  17  constituting a right side of the frame  10  as shown in  FIG. 22 . 
     The opening/closing mechanism  18  of  FIG. 22  will be described in detail with reference to  FIGS. 23 to 25 . 
     The opening/closing mechanism  18  includes a knob  200 , and a worm  204  and wheels  206  and  208  are included in a case  202 . The knob  200  is shaft-coupled to the worm  204 . If a user rotates the knob  200 , the worm  204  may be rotated in connection with the knob  200 . The worm  204  and wheel  206  are tooth-combined with each other, and the rotational directions of the worm  204  and the wheel  206  vertically intersect with each other. Accordingly, the torque of the worm  204  is generated by the original driving force of the knob  200 , and the torque of which direction is vertically changed by the wheel  206  is generated by the wheel  206 . The wheels  206  and  208  are disposed in parallel, and are connected to each other through a shaft  210 . The torque of the wheel  206  is horizontally transmitted to the wheel  208 . 
     Here, the worm  204  and wheel  206  may be disposed at the exterior of the cover vertical frame  176 , and the wheel  208  may be disposed between the cover vertical frame  176  and the main vertical frame  178 . A pair of link holes  212  are formed in the wheel  208 , and the pair of link projections  182   a  of the holder  182  are inserted into the pair of link holes  212 , respectively. 
     A specific holder  182  is correspondingly coupled to the wheel  208 , and the link projections  182   a  of the specific holder  182  are inserted into the link holes  212  by passing through the pair of shafts  180   a  and  180   b , respectively. 
     The power transmitting mechanism including the opening/closing mechanism  18 , the holder and the shaft is configured as described above. Thus, if a user rotates the knob  200  so as to open/close the louvers  20 , an original driving force is transmitted to the knob  200  by the user, and the worm  204  is rotated in connection with the knob  200  by rotating the knob  200 . Then, torque in the direction vertical to the worm  204  is generated by the wheel  206 , and the wheel  206  transmits the torque to the wheel  208 . The wheel  208  rotates the specific holder  182  coupled thereto. 
     The specific holder  182  drives the pair of shafts  180   a  and  180   b  within the vertical frame, in which the specific holder  182  is included, in opposite directions to each other. The driving of the pair of shafts  180   a  and  180   b  causes rotations of other holders  182  linked with the specific holder  182 , and the holders  182  are rotated, so that the louvers  20  and the brackets  22  coupled to the respective holders  182  are rotated. In this case, the louvers  20  and brackets  22  are rotated using the respective holders  182  as rotary axes so as to be closed or opened according to the rotational direction of the louvers  20 . 
     That is, the state of  FIG. 26  is developed into the states of  FIGS. 27 and 28 , so that the louver  20  and bracket  22  can be opened. On the contrary, the state of  FIG. 28  is developed into the states of  FIGS. 27 and 25 , so that the louver  20  and the bracket  22  can be closed. 
     In the configuration described above, an electric motor operated under a user&#39;s switch operation may be used other than the knob. In this case, the vibration motor may be configured so that the original driving force of which rotational direction is determined by the user&#39;s switch operation is transmitted to the worm by the electric motor. 
     As describe above, in the louver module according to the embodiment of the present invention, the louver  20  included in the louver unit is operated by a worm gear including the gear coupling between the worm  204  and the wheel  206 , so that the opening/closing of the louver  20  can be controlled at a minute angle. 
     Since the worm  204  and the wheel  206  are engaged with each other through the gear coupling, the opening/closing state of the louver  20  is not easily changed even in the situation in which external pressure caused by a draft of air, etc. is applied to the louver  20 . Thus, the opening/closing state of the louver  20  can be stably maintained. 
     Since the louver of the louver module according to the embodiment of the present invention is configured so that at least one surface of the louver has a streamline shape, an upward force is generated in air ventilated by the structure of the louver, and thus the flow velocity of the air can be increased. Accordingly, smooth ventilation can be achieved. 
     The louver module according to the embodiment of the present invention may have a configuration shown in  FIG. 29 .  FIG. 29  illustrates a state in which a louver module  300  is coupled to a chassis  400 . 
     Here, the chassis  400  corresponds to a chassis to which a ventilation window or smoke ventilation window of an apartment building, studio apartment or complex building is coupled. The chassis  400  may be installed to have a structure of a fixed type or a structure in which the window can be opened/closed through sliding. 
     The louver module  300  according to the embodiment of the present invention may be supported to the chassis  400  so as to be rotatably opened/closed using the vertical or horizontal direction as an axis. In a case where the louver module  300  is supported to the chassis  400  so as to be rotatably opened/closed using the vertical direction as an axis, the opening/closing of the louver module  200  can be performed as shown in  FIG. 30 . 
     As described above, the louver module  300  according to the embodiment of the present invention may be variously employed and configured in the louver system. 
     Although the present invention has been described in connection with the preferred embodiments, the embodiments of the present invention are only for illustrative purposes and should not be construed as limiting the scope of the present invention. It will be understood by those skilled in the art that various changes and modifications can be made thereto within the technical spirit and scope defined by the appended claims.

Technology Classification (CPC): 4