Abstract:
Disclosed herein is a disperser which can be easily installed without any air pump, a transfer pope and a porous disperser in such a way to install an impeller, which is employed to discharge water and at the same time to suck air, at an end portion after a shaft employed to transfer the driving force of a driving motor has been connected underwater, wherein the disperser of the present inventive concept is easy to maintain without cleaning due to the plugging, whereupon maintenance is easy and the applicability of the product is good.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to and the benefit of PCT Patent Application PCT/KR2014/007977 filed in the Korean Intellectual Property Office on Aug. 27, 2014, which claims priority to Korean Patent Application No. 10-2013-0131907 filed in the Korean Intellectual Property Office on Nov. 1, 2013, the entire contents of which are incorporated herein by reference. 
     
    
     BACKGROUND 
       [0002]    (a) Technical Field 
         [0003]    The present inventive concept relates to a disperser which is able to disperse air in water, and in particular to a disperser which is able to generate a bubble jet stream in water with a higher efficiency as compared to electric power consumption without any loss in terms of driving force which may occur due to suction. 
         [0004]    (b) Background Art 
         [0005]    A primary method for aerating (dispersing) a gas (air, oxygen, etc.) in water may be carried out, for example, in such a way that the gas compressed with an air pump is supplied to a porous disperser via a transfer pipe, which in general is being employed where water is shallow and an air dispersion area is not wide. 
         [0006]    As a conventional disperser, the aerator (Korean patent laid-open No. 1152746) includes a casing which is fixedly installed on the floor in such a way to be submerged at a portion of the inside of a reaction tank of a water treatment apparatus and is formed of an inlet passage the top of which is open, and an outlet passage formed inclined downward; an air supply pipe which is supporting an outer portion of the casing and is formed of an air supply port communicating with a central portion of the inside of the casing via a lower portion of the casing; a conical diffuser which is covered on the top of the air supply port of the air supply pipe and is fixedly installed at a lower portion of the inside of the casing and is configured to accommodate a predetermined amount of air of the air supply port and has a bubble discharge hole, wherein an outer circumferential surface of a lower portion of the inside thereof is open in order for the air, which is continuously supplied via the air supply pipe, to be exhausted downward; an impeller which is engaged rotatable to an upper portion of the diffuser inside the casing and is employed to receive waste water of the upper portion of the casing and mix and discharge the waste water downward, while spreading and dispersing the bubbles which are generated by the diffuser during the discharge thereof; and a driving motor which is able to drive the impeller and is disposed integral with the impeller and is fixedly installed at the top of the casing. The diffuser of the aforementioned aerator is provided with the diffuser wherein a plurality of holes are disposed at regular intervals at a side surface of the conical configuration without any bubble discharge holes at a lower portion of the conical configuration. 
         [0007]    As another conventional disperser, the disperser (Korean patent registration No. 2010-0056215) includes a shaft which is configured to rotate by the driving of a motor; a plurality of rotors which are installed horizontally at a lower portion of the shaft; an impeller which is installed at the tops of the rotors; a case which is provided to accommodate the impeller and the rotors, and a separation housing which is installed at an upper portion of the case, wherein a space part is formed at a lower portion thereof, and an inlet groove is formed in a circumferential direction at the top of the space part, and a retrieval pipe is formed at a portion of the inlet groove, wherein a plurality of slits are formed over a surface from a portion of the shaft at the space part of the separation housing to a portion of the top of the impeller in the configuration of the shaft which is installed passing through the separation housing and the impeller. 
         [0008]    The aforementioned conventional dispersers and other dispersers have problems, for example, water pressures are too high where water is deep and an air dispersion area is wide, and a very strong air pump should be used, which is able to generate air high enough to exceed the resistance pressures of the pipe and porous disperser. Moreover, the transfer pipes should be installed underwater, and it is hard to select an efficient disperser, and maintenance may be hard due to the plugged porous holes. 
       SUMMARY OF THE DISCLOSURE 
       [0009]    The present inventive concept has been made in an effort to solve the above-described problems associated with prior art. 
         [0010]    It is an object of the present inventive concept to provide a disperser which can be easily installed without any air pump, a transfer pope (a hollow shaft) and a porous disperser in such a way to install an impeller, which is employed to discharge water and at the same time to suck air, at an end portion after a shaft employed to transfer the driving force of a driving motor has been connected underwater, wherein the disperser of the present inventive concept is easy to maintain without cleaning due to the plugging, whereupon maintenance is easy and the applicability of the product is good. 
         [0011]    To achieve the above object, there is provided a disperser which may include, but is not limited to, a driving motor, a hollow shaft, one end portion of the hollow shaft is connected to the driving motor and is configured to be rotated by the driving motor, and an impeller which is disposed on an opposite end portion of the hollow shaft and is employed to discharge air to the outside of the dispenser, a rotary joint connecting the one end portion of the hollow shaft to the driving motor, wherein the impeller includes a circular plate-shaped body having a plurality of wings at a lower surface thereof, and an upper circular plate-shaped guide wing and a lower circular plate-shaped guide wing disposed at the upper and lower portions of the body, respectively, and a plurality of suction ports formed through the lower circular plate-shaped guide wing, the edges of the upper circular plate-shaped guide wing and the lower circular plate-shaped guide wing are bent at predetermined angle toward the circular plate-shaped body. 
         [0012]    The rotary joint may include a hollow rotation body to which an upper end portion of the hollow shaft is connected and a fixed body which surrounds an outer surface of the rotation body, and through holes formed to pass through inner centers of the rotation body and the fixed body. 
         [0013]    The predetermined angle may be from about 25° to about 30°. 
         [0014]    A center of the lower circular plate-shaped guide wing may have a concave shape when viewed from the top. 
         [0015]    The disperser may further include a floating device connected to the driving motor by a connection member. 
         [0016]    The floating device may include a central plate connected to the connection member, a plurality of rods connected to the central plate and a floating body connected to the plurality of rods. 
         [0017]    The central plate may include a central hole formed at a center of the central plate. 
         [0018]    The central plate may further include a cut-away hole extending from the central hole to an edge of the central plate. 
         [0019]    The floating body may further include a rod insertion hole form on a top portion of the floating body and a connection cap having a rod mounting groove on a top portion of the floating body. 
         [0020]    The floating device may further include a guide plate connected to the central plate by supporting rods. 
         [0021]    The floating device may further include a fixing plate connected to the central plate to fix the hollow shaft not to detach from the central plate. 
         [0022]    The disperser may further include an engaging member connecting the hollow shaft to an auxiliary hollow shaft. 
         [0023]    The disperser according to the present inventive concept has a simplified configuration. A water suction force via a suction port is good since a central portion of a lower guide wing is formed concave, and the central portion becomes a vacuum state with the aid of centrifugal force during the rotation of a guide wing, and the guide wing can be easily attached and detached, and the fluid discharged from the impeller can be dispersed upward or downward or up to a near or distant area, and applicability on site can be maximized. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0024]    The above and other features of the present inventive concept will now be described in detail with reference to certain exemplary embodiments thereof illustrated the accompanying drawings which are given hereinbelow by way of illustration only, and thus do not limit the present inventive concept, and wherein: 
           [0025]      FIG. 1  is a perspective view illustrating a disperser according to the present inventive concept; 
           [0026]      FIG. 2  is a perspective view illustrating a hollow shaft and an impeller of a disperser according to the present inventive concept; 
           [0027]      FIG. 3  is a view illustrating a rotary joint according to the present inventive concept; 
           [0028]      FIG. 4  is a perspective view illustrating an engaging member according to the present inventive concept; 
           [0029]      FIG. 5  is a disassembled perspective view illustrating an impeller of a disperser according to the present inventive concept; 
           [0030]      FIG. 6  is a perspective view illustrating an impeller body of a disperser according to the present inventive concept; 
           [0031]      FIG. 7  is a perspective view illustrating an impeller when viewing from the bottom of the impeller according to the present inventive concept; 
           [0032]      FIGS. 8, 9, 10 and 11  are views illustrating the spraying directions based on an engaging direction of a guide wing of a disperser according to the present inventive concept; 
           [0033]      FIG. 12  is a view for describing the use of a floating device for a disperser according to the present inventive concept; 
           [0034]      FIG. 13  is a perspective view illustrating another configuration in  FIG. 12 ; 
           [0035]      FIG. 14  is a rear view illustrating a floating device; 
           [0036]      FIG. 15  is an enlarged view illustrating a floating body of a floating device for a disperser according to the present inventive concept; 
           [0037]      FIG. 16  is a bottom view illustrating a connection cap which is engaged to a floating device; 
           [0038]      FIG. 17  is a plane view illustrating a connection cap which is engaged to a floating device; 
           [0039]      FIG. 18  is a plane view illustrating a central plate of a floating device; 
           [0040]      FIG. 19  is a view illustrating a state where a hollow shaft of a disperser positions below a central plate; 
           [0041]      FIG. 20  is a perspective view another example of a floating device according to the present inventive concept; 
           [0042]      FIG. 21  is a partially enlarged view illustrating an upper portion of a floating device according to another embodiment of the present inventive concept; and 
           [0043]      FIG. 22  is a partially enlarged view illustrating a lower portion of a floating device according to another embodiment of the present inventive concept. 
       
    
    
       [0044]    It should be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various preferred features illustrative of the basic principles of the inventive concept. The specific design features of the present inventive concept as disclosed herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particular intended application and use environment. 
         [0045]    In the figures, reference numbers refer to the same or equivalent parts of the present inventive concept throughout the several figures of the drawing. 
       DETAILED DESCRIPTION 
       [0046]    The disperser  100  according to the present inventive concept may include, but is not limited to, a driving motor  110 ; a hollow shaft  120  which is configured to rotate by the driving motor  110 ; and an impeller  140  which is installed at a lower end portion of the hollow shaft  120  and is employed to discharge air which is inputted into the hollow shaft  120  to the outside of the disperser  100 , wherein the driving motor  110  and the hollow shaft  120  are coupled by a rotary joint  130 , and an upper portion of the rotary joint  130  is connected to a driving shaft  111  of the driving motor  110 , the rotary joint  130  comprises a hollow rotation body  131  to which an upper end portion of the hollow shaft  120  is connected and which is disposed at an inner portion thereof and is configured to rotate together with the hollow shaft  120 , and a fixed body  132  which is installed at an outer portion of the rotation body  131 , and the fixed body  132  cannot rotate, and through holes  131   a  and  132   a  formed through inner centers are formed at the lateral surfaces of the rotation body  131  and the fixed body  132 , thus inputting external air into the hollow shaft  120 . 
         [0047]    Moreover, the impeller  140  may include, but is not limited to, a circular plate-shaped body  141  wherein a plurality of wings  144  are disposed in a circumferential direction at a lower surface thereof. Upper and lower circular plate-shaped guide wings  142  and  143  are engaged to the upper and lower portions of the circular plate-shaped body  141 . A plurality of suction ports  145  are formed at the lower guide wing  143  while passing through from top to bottom of the lower circular plate-shaped guide wing  143 . 
         [0048]    Furthermore, the edges of the upper and lower guide wings  142  and  143  are bent at predetermined angles toward the circular plate-shaped body  141 . 
         [0049]    The disperser according to the present inventive concept will be described in details with reference to the accompanying drawings. 
         [0050]      FIG. 1  is a perspective view illustrating a disperser according to the present inventive concept,  FIG. 2  is a perspective view illustrating a hollow shaft and an impeller of a disperser according to the present inventive concept, and  FIG. 3  is a view illustrating a rotary joint according to the present inventive concept. 
         [0051]    Referring to  FIG. 1 , the disperser  100  according to the present inventive concept may include, but is not limited to, a driving motor  110 , and a hollow shaft  120  which is driven by the driving motor  100 . 
         [0052]    The hollow shaft  120  may be made of a metallic hollow pipe. 
         [0053]    The hollow shaft  120  may be preferably made of a material SUS304 or SUS316 which has a good corrosion resistance and straightness. 
         [0054]    Meanwhile, an impeller  140  is provided at an end portion of the hollow shaft  120  which is disposed to oppose the driving motor, wherein the impeller  140  is employed to discharge sucked air via the hollow shaft  120  to the outside of the disperser  100 . 
         [0055]    The driving motor  110  and the hollow shaft  120  are interconnected by the rotary joint  130 . 
         [0056]    The rotary joint  130  may include, but is not limited to, a rotation body  131  which is made in the form of a hollow body, wherein a driving shaft  111  of the driving motor  110  and a hollow shaft  120  are connected to both ends of the rotation body  131 . The rotation body  131  can rotate with the driving shaft  111  and the hollow shaft  120 . A fixed body  132  which is made in the form of a hollow body while accommodating the rotation body  131  within an inner concentric circle surrounds outer surface of the rotation body  131  and is configured not to interrupt the rotation of the rotation body  131 . Through holes  131   a  and  132   a  are formed at the lateral portions of the rotation body  131  and the fixed body  132  to expose an inner hole of the rotary joint  130 . 
         [0057]    More specifically, the rotary joint  130  may include the rotation body  131  to both ends of which the driving shaft  111  and the hollow shaft  120  are connected, and the fixed body  132  which is fixed at an outer portion of the rotation body  131  and is configured not to interrupt the rotation of the rotation body, and the through holes  131   a  and  132   a  are formed at the lateral surfaces of the rotation body and the fixed body in the directions toward the inner center of the rotary joint  130 . 
         [0058]    Moreover, a space is formed between the rotation body and the fixed body. A bearing, etc. are provided for the sake of smooth rotation of the rotation body in a state where the rotation body and the fixed body are engaged together. 
         [0059]    The bearing is a typical member, so it is not illustrated in the drawings. 
         [0060]    External air can be inputted via the through hole  132   a  of the fixed body  132  with the aid of the rotation of the impeller. The external air can be inputted into the hollow shaft  120  via the space between the fixed body and the rotation body  131  and via the through hole  131   a  of the rotation body  131 . 
         [0061]    Meanwhile, since the driving motor  110 , the rotation body  131  of the rotary joint and the hollow shaft  120  are configured to integrally rotate together, and the fixed body of the rotary joint does not rotate, a tube (not shown) won&#39;t be twisted even if the tube is engaged to the through hole  132   a  of the fixed body  132  so as to input a predetermined gas, for example, oxygen, nitrogen, etc., not the air, into the hollow shaft. 
         [0062]    As illustrated in  FIG. 1 , the aforementioned disperser  100  according to the present inventive concept is preferred installed in a vertical posture in such a way that the driving motor  110  is disposed on outside of water, and the impeller  140  is disposed under the water. 
         [0063]    More specifically, the driving motor is disposed at an upper portion which is out of the water, and the hollow shaft driven by the driving motor is installed upright in the downward direction, with an end portion thereof positioning under the water, and the impeller configured to discharge air inputted via the hollow shaft  120  into the water is disposed at an end portion of the hollow shaft  120 . 
         [0064]    Meanwhile, the length of the hollow shaft  120  can be extended at a place, where water is deep, in such a way to connect the hollow shafts using an engaging member  150 . 
         [0065]    The engaging member may be made of a metallic material or a synthetic resin material. 
         [0066]    In the engaging member  150 , a vertical cut-away groove  153  is formed at both ends of the housing  151  of the hollow body, and an engaging groove  152  into which an engaging member, for example, a bolt, a pin, etc. is inserted is provided at a lateral portion of the housing  151  which is disposed orthogonal to the cut-away groove  153 . 
         [0067]    The hollow shaft  120  is inserted into both ends of the housing  151 , and a hole (not illustrated) of the hollow shaft is aligned with the engaging groove of the housing, and the bolt or the pin is passed through and engaged, and then the nut is tightened, thus interconnecting the hollow shafts. 
         [0068]    When the bolt is passed through with the aid of the engaging groove formed at the housing  151 , and the nut is tightened, the widened vertical cut-away groove  150  will be closed, thus reducing the diameter of the housing  151 , whereupon the hollow shafts  120  can be more strongly covered. 
         [0069]      FIG. 5  is a disassembled perspective view illustrating an impeller of a disperser according to the present inventive concept,  FIG. 6  is a perspective view illustrating an impeller body of a disperser according to the present inventive concept, and  FIG. 7  is a perspective view illustrating an impeller when viewing from the bottom of the impeller according to the present inventive concept. 
         [0070]    As illustrated in  FIGS. 5 and 6 , the impeller  140  of the disperser  100  according to the present inventive concept may include, but is not limited to, a circular plate-shaped body  141  wherein a plurality of wings  144  are disposed at a lower surface thereof in a circumferential direction, and upper and lower circular plate-shaped guide wings  142  and  143  which are installed at the upper and lower portions of the body  141 . A plurality of suction ports  145  passing through from top to bottom are formed at the lower guide wing  143 . 
         [0071]    It is preferred that a plurality of the suction ports  145  are disposed at regular intervals in the circumferential direction. 
         [0072]    A ventilation pipe  146  communicating with the hollow shaft  120  is provided at the top of the circular plate-shaped body  141 , and a through hole  147  configured to receive air is formed at a lateral portion of the ventilation pipe  146 , and a plurality of assistant wings  148  are formed at regular intervals in the circumferential direction at a lateral portion of the ventilation pipe  146 , by means of which air can be more efficiently inputted. 
         [0073]    Moreover, the wings  144  are disposed at regular intervals at the edges of the lower surface of the circular plate-shaped body  141 , and the upper and lower guide wings  142  and  143  are provided at the upper and lower portions of the circular plate-shaped body  141 . 
         [0074]    More specifically, the impeller  140  according to the present inventive concept is configured in a dual structure which is formed of the wings  144  formed at the edges of the circular plate-shaped body  141  and the assistant wings  148  formed at an outer surface of the ventilation pipe  146 . The assistant wings  148  formed at the ventilation pipe  146  are employed to assist in the input of air, and the wings  144  formed at the edges of the circular plate-shaped body  141  are employed to assist in the input of water and the discharge of air together. 
         [0075]    The blades are formed in a radial direction by means of which the air inputted via the hollow shaft  120  and the water sucked via the suction ports  145  of the lower guide wing  143 , which will be described later, can be efficiently discharged into water. 
         [0076]    A hollow hole (H) through which the ventilation pipe  146  of the body can pass is formed in the center of the upper circular plate-shaped guide wing  142 . 
         [0077]    Moreover, the edges of the upper and lower circular plate-shaped guide wings  142  and  143  are bent at predetermined angle toward the circular plate-shaped body. 
         [0078]    More specifically, the centers of the upper and lower circular plate-shaped guide wings  142  and  143  are formed horizontal, and the edges thereof are bent upward or downward at the angle of about 25°˜about 30°. 
         [0079]    As illustrated in  FIG. 7 , the center of the lower circular plate-shaped guide wing  143  may have a concave shape when viewed from the top. 
         [0080]    The aforementioned configuration is employed to accelerate the input of the water into the impeller  140  via the suction ports  145  by forming a vacuum state in the central portion by means of the centrifugal force at the lower surface of the lower circular plate-shaped guide wing  143  during the rotations by the driving motor  110 . 
         [0081]    The impeller  140  is disposed at a lower portion of the hollow shaft  120  and will rotate together with the hollow shaft  120 , by which air can be naturally discharged into water via the impeller  140 . 
         [0082]    The water can be also inputted via the suction ports  145  formed at the lower circular plate-shaped guide wing  143  and can be discharged together with the air in the form of bubble jet streams. 
         [0083]    The impeller  140  is made of a reinforced plastic material consisting of a nylon-66 and a glass fiber at a ratio of 7:3. 
         [0084]      FIGS. 8 to 11  are views illustrating the spraying directions which are determined based on the engaging directions of the circular plate-shaped guide wings  142  and  143  of the disperser  100  according to the present inventive concept. 
         [0085]    In  FIGS. 8 to 11 , the character (A) represents the flow of air, and (W) represents the flowing direction of water. 
         [0086]    As illustrated in  FIG. 8 , the bent direction of the upper circular plate-shaped guide wing  142  is facing downward, and the bent direction of the lower circular plate-shaped guide wing  143  is facing upward, by means of which the discharging area can be narrowed, thus allowing the air to be more strongly discharged, whereby the air can be more efficiently discharged up to a distant area. As illustrated in  FIG. 9 , if the bent direction of the upper circular plate-shaped guide wing  142  and the bent direction of the lower circular plate-shaped guide wing  143  are facing upward and downward, respectively, the area of the discharging is wide, by means of which the air can be weakly discharged, whereupon the air cannot be discharged up to a distant area. 
         [0087]    As illustrated in  FIGS. 10 and 11 , if the bent directions of the upper and lower circular plate-shaped guide wings  142  and  143  are same, facing either upward or downward, the discharging direction of the air can be an upward direction or a downward direction. 
         [0088]      FIG. 12  is a view for describing the use of a floating device for a disperser according to the present inventive concept,  FIG. 13  is a perspective view illustrating another configuration in  FIG. 12 ,  FIG. 14  is a rear view illustrating a floating device,  FIG. 15  is an enlarged view illustrating a floating body of a floating device for a disperser according to the present inventive concept,  FIG. 16  is a bottom view illustrating a connection cap which is engaged to a floating device,  FIG. 17  is a plane view illustrating a connection cap which is engaged to a floating device,  FIG. 18  is a plane view illustrating a central plate of a floating device,  FIG. 19  is a view illustrating a state where a hollow shaft of a disperser positions below a central plate,  FIG. 20  is a perspective view another example of a floating device according to the present inventive concept,  FIG. 21  is a partially enlarged view illustrating an upper portion of a floating device according to another embodiment of the present inventive concept, and  FIG. 22  is a partially enlarged view illustrating a lower portion of a floating device according to another embodiment of the present inventive concept. 
         [0089]    The floating device for a disperser  100  according to the present inventive concept is engaged to the disperser  100  which is able to aerate air in water, whereby the disperser  100  can float on the seawater. The disperser  100  which is intended to be engaged to the floating device of the disperser according to the present inventive concept will be first described. 
         [0090]    As illustrated in  FIG. 12 , the disperser  100  may include, but is not limited to, a driving motor  110 , a hollow shaft  120  formed in a hollow body shape which may be rotated by the driving motor  110 , and an impeller  140  which is installed at a lower portion of the hollow shaft  120  and is employed to discharge to the outside the air which is inputted into the hollow shaft  120 . 
         [0091]    The driving motor  110  and the hollow shaft  120  are engaged by a rotary joint. The upper portion of the rotary joint is connected to the driving shaft of the driving motor  110 , and the lower portion thereof is formed of a rotation body made in the form of a hollow body to an upper portion of which the hollow shaft is connected and which is configured to rotate together, and a fixed body installed at an outer portion of the rotation body. The fixed body is not rotatable. Through holes allowing external air to move into the inside of the hollow shaft are formed at the lateral portions of the rotation body and the fixed body while passing through the inner centers thereof. 
         [0092]    The floating device  200  for a disperser according to the present inventive concept may include, but is not limited to, a central plate  210  to an upper surface of which the disperser  100  is engaged, a plurality of rods  220  which are engaged in a radial shape to the central plate  210 , and a floating body  230  which is engaged to the rods  220 . 
         [0093]    Moreover, the central plate  210  is formed in a plate shape, and a cut-away hole  212  is formed in a radius direction. The horizontal cross section thereof is formed in a shape of          . The cut-away hole  212  is employed to allow the hollow shaft  120  of the disperser  100  to easily rotate in the downward direction of the central plate  210  when the disperser  100  is engaged to the upper surface of the central plate  210 . 
         [0094]    Furthermore, the fixed plate  211  is engaged detachable to the edge of the central plate wherein the cut-away hole  212  is formed. The fixed plate  211  is employed to prevent the hollow shaft  120  of the disperser  100  from emerging up to the water surface during the use of the disperser  100 . 
         [0095]    A worker may engage the disperser  100  to the upper surface of the central plate  210  and may position the hollow shaft  120  of the disperser  100  below the central plate  210  via the cut-away hole  212  and then may engage the fixed plate  211 , whereby air can be dispersed in water in a state where the hollow shaft  120  is not emerged out of the water. 
         [0096]    More specifically, a connection member  250 , the vertical cross section of which is formed in a shape of          , is engaged to the upper surface of the central plate  210 , and the driving motor  110  of the disperser  100  is installed operable at an end portion of the connection member. When a user uses the disperser  100 , the hollow shaft  120  of the disperser  100  is rotated downwards to be submerged in water and then is used. 
         [0097]    Meanwhile, a plurality of rods  220  are engaged in a radius direction to the central plate  210 . A plurality of the rods  220  are arranged in a radial shape, and the floating body  230  is engaged to an end portion of the rod  220 . 
         [0098]    The floating body  230  is a float which is made of a Styrofoam, a plastic material, etc. and is able to float on liquid. It can be manufactured in various shapes, for example, a cylindrical shape, a quadrangular box shape, a conical shape, etc. In the present inventive concept, it is preferably made in a water drop shape. 
         [0099]    As illustrated in  FIG. 15 , the floating body is formed of a water drop shape, the vertical cross section of which is formed in a shape of          . A rod insertion hole  231  is formed horizontally at an upper portion of an outer circumference of the floating body  230 , and the rod  220  is inserted in the rod insertion hole  231 , so the floating member  230  can be engaged to the central plate  210 . 
         [0100]    Moreover, a connection cap  240  is engaged to the top of the floating body  230 . The connection cap  240  is engaged to the top of the floating body  230  in such a way to cover the top of the floating body  230 . 
         [0101]    The lower portion of the connection cap  240  is formed open for the same of easier mounting on an upper outer circumference of the floating body  230 , and the vertical cross section thereof is formed in a trapezoid shape. 
         [0102]    Furthermore, a hollow hole  241 , which is passing through from top to bottom, is formed at an upper surface of the connection cap  240 , wherein the top of the floating body  230  can pass through the hollow hole  241 . A rod mounting groove  242  is formed at an upper surface in order for the rod to be inserted into the road mounting groove  242 , and the rod mounting groove  242  is formed crossing the hollow hole  241 . 
         [0103]    Referring to  FIG. 13 , the rod  220  is mounted at the rod mounting groove  242  of the connection cap  240  and is inserted in the rod insertion hole  231  of the floating body  230  which is engaged passing through the hollow hole  241  of the connection cap  240 , and a bolt is engaged passing through both the rod  220  and the connection cap  240 , whereby the rod  220 , the connection cap  240 , and the floating body  230  can be fixedly engaged. 
         [0104]    As illustrated in  FIGS. 20 to 22 , according to an example of the central plate  210 , the guide plate  213  is engaged horizontally side by side to the top of the central plate  214 , and the guide plate  213  is engaged spaced apart at a predetermined interval from the top of the central plate  214 . 
         [0105]    Moreover, a plurality of support rods  214  are engaged vertically between the central plate  210  and the guide plate  213 , thus supporting the guide plate  213 . 
         [0106]    Furthermore, the driving motor  110  is fixed at the upper surface of the guide plate  213 . Since the driving motor  110  is fixed at the upper surface of the guide plate  213 , the hollow shaft  120  of the disperser  100  cannot rotate, whereby it is possible to enhance any stability when in use of the float tie for the disperser  100  according to the present inventive concept. 
         [0107]    In addition, according to an example of the support rod  214 , the support rod  214  is length-adjustable. The support rod  214  may include, but is not limited to, a support rod body having a space inside thereof, and a length adjusting rod which is inserted in the space of the support rod body and, thus, length-adjustable. 
         [0108]    A plurality of tightening nut holes are formed in the lengthwise direction of the rod at the outer circumferences of the support rod body and the length adjusting rod. Tightening nuts are inserted passing through the tightening nut holes of the support rod body and the length adjusting rod and are tightened, whereby the support rod body and the length adjusting rod can be fixed. 
         [0109]    More specifically, the submerged length of the hollow shaft  120  of the disperser  100  in water can be adjusted in such a way that the user inserts the length adjusting rod into the inside of the support rod body or separates it in the lengthwise direction of the support rod body. For this reason, the float tie for the disperser  100  and the disperser  100  according to the present inventive concept can be used at a shallow water area. 
         [0110]    Moreover, according to another example of the length-adjustable support rod, a predetermined section of the support rod is formed of a flexible part. The length of the support rod can be adjusted in such a way that the user pulls upwards the flexible part, if necessary, or presses it downwards. 
         [0111]    In the flexible part, a plurality of taper-shaped members are continuously engaged. The length can be adjusted since the aforementioned members are folded or unfolded. Since a fold type door (a folding door), a flexible hose, etc. are known and are being widely used, the detailed description thereon will be omitted. 
         [0112]    The user is able to bend the flexible part, if necessary, so as to adjust the inclination of the hollow shaft  120  of the disperser  100 , so air can be dispersed in a predetermined area. 
         [0113]    The fixing rod is engaged detachable to an outer circumference of the flexible part, thus preventing the flexible part from bending due to the weights of the central plate  210  installed at the top of the support rod  214  and the disperser  100 . The fixing rod is formed in a rod shape and is engaged to an outer circumference of the flexible part by using a tightening member, for example, a bolt, a nut, etc., so it can be detachable. 
         [0114]    As described above, the disperser according to the present inventive concept has a simplified configuration, and a water suction force via a suction port is good since a central portion of a lower guide wing is formed concave when viewed from the top, and the central portion becomes a vacuum state with the aid of centrifugal force during the rotation of a guide wing, and the guide wing can be easily attached and detached, and the fluid discharged from the impeller can be dispersed upward or downward or up to a near or distant area, and applicability on site can be maximized. 
         [0115]    The inventive concept has been described in detail with reference to preferred embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the inventive concept, the scope of which is defined in the appended claims and their equivalents.