Air cleaner

Abstract

To provide an air cleaner capable of allowing air discharged from a grille to reach far from the air cleaner while facilitating cleaning of the grille serving as an air discharge port.SOLUTION: The air cleaner includes a filter, a drive motor, and a rotary fan, and cleans air sucked into a main body by the filter and discharges the air from a vent hole of a grille, the grille includes a first grille 201 and a second grille 202 disposed to overlap each other, the first grille 201 and the second grille 202 form vent holes by a plurality of parallel slits, and a long axis direction of the slits of the first grille 201 and a long axis direction of the slits of the second grille 202 are disposed to intersect each other.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to an air purifier. [Background technology]

[0002] 2. Description of the Related Art Nowadays, air purifiers are widely used in homes, offices, and other living spaces to remove airborne particles such as dust and pollen, as well as cigarette smoke, to produce clean air.

[0003] In many cases, these air purifiers use filters to remove fine particles from the air, but over long periods of use, the filters become dirty and clogged, causing the purifier to function less well and become less efficient, necessitating cleaning of the air purifier.

[0004] As for the filter provided near the air intake port and prone to significant contamination, there have been proposals (for example, Patent Document 1) that allow filter replacement to be carried out easily and cleanly. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2020-099858 Summary of the Invention [Problem to be solved by the invention]

[0006] As mentioned above, although several proposals have been made to keep the area around the air intake of an air purifier clean, the current situation is that there are still insufficient measures in place to keep the area around the air exhaust port clean.

[0007] This is because the air outlet side passes clean air that has been purified by the air purifier, so compared to the air intake side, the progress of dirt on the air outlet side is much less than on the air intake side within a given period of time, and less frequent cleaning is sufficient. However, after long-term use, cleaning around the exhaust side will also become necessary.

[0008] However, in many cases, air exhaust ports are provided with a grill to prevent fingers or foreign objects from getting inside the port. If the shape of the exhaust port is rectangular, this grill will have a lattice-like configuration with many rectangular holes arranged vertically and horizontally, and if the shape of the exhaust port is circular, it will have a large number of rectangular holes arranged vertically and horizontally inside the circle, or a grill with many arc-shaped holes formed by holding multiple concentric ring-shaped straightening plates that match the shape of the exhaust port with bridges arranged radially, such as in a cross shape.

[0009] In grilles with a grid of these rectangular holes arranged vertically and horizontally, or grilles with a large number of arc-shaped holes arranged with bridges radiating from the center, the holes are so small that fingers cannot be inserted, making cleaning the grill complicated and difficult to maintain.

[0010] Furthermore, grills that have slit-shaped holes at the exhaust port to prevent fingers or foreign objects from getting in are relatively easy to clean. However, although the exhaust air is rectified in the minor axis direction of the parallel slits by the fin shape between the slits, the air disperses in the major axis direction of the slits, making it difficult to send the air far. [Means for solving the problem]

[0011] The air purifier of the present invention has a filter, a drive motor, and a rotating fan, and purifies the air drawn into the main body using the filter before discharging it through the grill vent, characterized in that the grills are arranged in a stack of a first grill and a second grill, the first grill and the second grill form the vent with a number of parallel slits, and are arranged so that the long axis direction of the slits in the first grill intersects with the long axis direction of the slits in the second grill.

[0012] Furthermore, one of the frame portions formed around the first grill and the second grill may have an engaging portion, and the frame portion formed around the other grill may have an engaged portion that engages with the engaging portion.

[0013] In addition, the top case cover, which has a grill storage wall and a grill receiving portion that stores the first grill and the second grill, may be characterized in that the receiving portion has an engagement hole into which the insertion engagement portion of the first grill is inserted, and the grill storage wall has an engagement hole into which the engagement protrusion of the second grill is inserted.

[0014] The longitudinal direction of the slits of the first grille and the longitudinal direction of the slits of the second grille may be perpendicular to each other.

[0015] Furthermore, the rotary fan may be characterized in that it has a first impeller rotated by a first drive motor and a second impeller rotated by a second drive motor, and the first impeller and the second impeller have the same rotation axis and rotate in opposite directions.

[0016] The rotary fan may be attached to the rotary shaft of the drive motor in an easily detachable manner. [Effects of the Invention]

[0017] The air purifier of the present invention has a first grill and a second grill stacked on top of each other, and the first grill and the second grill are equipped with slit-shaped air vents. Therefore, when the first grill and the second grill are removed from the main body, each grill has a slit-shaped air vent, which makes it easy to clean each grill and allows the air purifier to be used with easy, clean air vents.

[0018] Although the slit-shaped air vent cannot prevent the air blown out from the air vent from diffusing in the long axis direction of the slit, because the long axis direction of the slit in the first grill and the long axis direction of the slit in the second grill intersect, the second grill can prevent the exhaust air from diffusing in the direction in which the air exhausted by the first grill diffuses, allowing the exhaust air to reach far away from the air purifier and effectively purifying the air over a wide area.

[0019] Furthermore, since the long axis direction of the slits in the first grille intersects with the long axis direction of the slits in the second grille, the ventilation openings are formed to be subdivided into many through-holes, which effectively prevents fingertips or foreign objects from entering the inside of the air purifier.

[0020] Furthermore, by using two grills with engaging portions and engaged portions on the frame portions of the first grill and the second grill, when the second grill is placed on top of the first grill, the directions of the first grill and the second grill can always be kept constant, and the long axis directions of the slits in the first grill and the long axis directions of the slits in the second grill can always be kept in a constant intersecting state.

[0021] Furthermore, if the top case cover has an engagement hole in the engagement receiving portion of the top case cover into which the insertion engagement portion of the first grill is inserted, and an engagement hole in the grill storage wall of the top case cover into which the engagement protrusion of the second grill is inserted, even if the grill is rectangular or the like, the first grill can be attached to the top case cover in a predetermined direction by aligning the insertion engagement portion with the engagement hole, and the engagement protrusion of the second grill can be inserted into the engagement hole to fix the second grill to the top case cover, thereby fixing the first grill below the second grill with the directions of the first grill and the second grill kept constant.

[0022] Furthermore, by making the longitudinal directions of the slits in the first grill and the second grill perpendicular to each other, a large number of through holes can be formed in a grid pattern in the ventilation hole, making the through holes as small as possible and more effectively preventing the entry of foreign matter, etc., and effectively preventing the diffusion of air discharged from the ventilation hole.

[0023] Furthermore, by using two impellers with aligned rotation axes that rotate in opposite directions as the rotary fan, the amount of swirl in the air sent from the rotary fan to the grill can be reduced, allowing the air discharged from the grill to reach far away from the air purifier effectively.

[0024] Furthermore, by attaching the rotating fan to the rotating shaft of the motor in an easily detachable manner, the rotating fan can be easily removed for cleaning, keeping the inside of the air purifier clean and enabling clean air to be constantly discharged. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a perspective view of an air purifier according to the present invention, seen from above and behind; [Figure 2] 1 is a perspective view of an air purifier according to the present invention, seen from below and behind; [Figure 3] 1 is a perspective view of an air purifier according to the present invention, seen from above and in front thereof; [Figure 4] 1 is a perspective view showing a state in which a filter cover and the like are removed in an air purifier according to the present invention. [Figure 5] 1 is a central cross-sectional side view of an air purifier according to the present invention. [Figure 6] 1 is a perspective view showing the internal structure of an air purifier according to the present invention. [Figure 7] FIG. 2 is a perspective view showing the internal structure of the air purifier according to the present invention, with the upper case cover and the upper inner cylinder removed. [Figure 8] 10 is a perspective view of the air purifier according to the present invention, in which a rectangular grill is used, with the first grill and the second grill separated from the upper case cover, as viewed obliquely from above. FIG. [Figure 9] 10 is a perspective view of the air purifier according to the present invention, in which a rectangular grill is used, with the first grill and the second grill separated from the upper case cover, as viewed obliquely from below. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0026] 1 and 2, an embodiment of the air purifier according to the present invention has a rectangular parallelepiped main body, and the lower portion of rear case cover 110 is a removable filter cover portion 111. The side surfaces are provided with upper side case cover 113 and lower side case cover 114, and a thick disk-shaped support portion 141 is provided at the portion connecting the lower end of upper side case cover 113 and the upper end of lower side case cover 114.

[0027] A reinforcing frame 229 having through holes formed in the entire bottom surface of the main body is used to enable the filter stored in front of filter cover portion 111 to be stored and supported at the bottom inside the main body of air purifier 100. A bottom frame portion 181 is provided around reinforcing frame 229, and this bottom frame portion 181 supports the lower ends of left and right lower side case covers 114 and the lower end of front case cover 115.

[0028] 3, a front case cover 115 is provided on the surface opposite rear case cover 110, and a sensor cover 147 is provided on one of the support parts 141 on the left or right side. Inside this sensor cover 147, a sensor for detecting odors and the amount of fine particles in the air is built in.

[0029] Additionally, an upper case cover 117 is provided on the top surface of the main body, and a second grill 202 that forms an air exhaust port is provided in the center of the upper case cover 117. Note that a first grill 201, which will be described later, is provided below the second grill 202.

[0030] Furthermore, a power switch, a mode selection switch, a pilot lamp indicating the operating state, etc. are provided around second grill 202 on top case cover 117. Note that the power operation and air volume adjustment operation may be performed using a remote controller.

[0031] Thick disk-shaped support parts 141 provided on both sides of the main body have groove parts 143 on their outer peripheries. Furthermore, curved parts 155 of leg parts 150 are aligned with these groove parts 143 and fixed so that curved parts 155 are embedded in groove parts 143, thereby joining support parts 141 and leg parts 150 together (see FIG. 2).

[0032] Furthermore, leg portion 150 has curved portion 155 formed midway between straight pipe-shaped first support portion 151 and straight pipe-shaped second support portion 153. The lower ends of first support portion 151 and second support portion 153 are located below the lower end of lower side case cover 114, and first support portion 151 has a disk-shaped grounding end portion 159 at its lower end.

[0033] Furthermore, second support columns 153 on the left and right sides of the main body are connected so that the lower ends of the second support columns 153 on the left and right sides are continuous with each other by a pipe whose lower end is made straight as ground connection section 157. This straight ground connection section 157 and ground end section 159 provided at the lower end of first support column 151 allow air purifier 100 to be placed stably on the floor or the like.

[0034] Furthermore, this air purifier 100 is equipped with a rotation axis connecting the centers of the left and right support parts 141, allowing the upper end of the main body to rotate back and forth, and allowing the top case cover 117 on the top surface of the main body to be turned from a front-to-back direction slightly below horizontal to an upward direction where the top case cover 117 is horizontal, making the main body rotatable within a range of approximately 240 degrees.

[0035] 4 and 5, a filter is provided on the inside front of filter cover portion 111. This filter is configured such that first filter 221 is supported at its lower surface by reinforcing frame 229 and is provided at the lower end of filter case 225, and second filter 222 and third filter 223 are located above first filter 221 and are housed together in filter case 225.

[0036] This first filter 221 is a pre-filter that collects dust and other particles floating in the air. The second filter 222 placed on top of the first filter 221 is a high-performance filter such as a HEPA filter. Furthermore, the third filter 223 is, for example, a deodorizing filter.

[0037] Filter case 225 supports the underside of first filter 221 with reinforcing frame 229, and has holes over substantially the entire underside, allowing air from below to be supplied to each of first filter 221 to third filter 223. Furthermore, rectangular frame-shaped cushioning material 228 holds down the periphery of third filter 223, and filter pressing frame 227 stores first filter 221 to third filter 223 within filter case 225, allowing air that has passed through third filter 223 to be discharged upward within air purifier 100.

[0038] Furthermore, this filter case 225 is integrated with the filter cover part 111, and by pushing down the lever 131 provided on the filter cover part 111, a stopper protrusion 135 that protrudes slightly from the upper end of the filter cover part 111 is lowered, making it possible to remove the filter case 225 from the main body of the air purifier 100.

[0039] Furthermore, the reinforcing frame 229 that supports the first filter 221 and other components inside the filter case 225 from below can be removed from the filter case 225 by sliding it forward from the filter case 225.

[0040] In this way, this air purifier 100 can draw air in from the bottom surface of the main body and discharge clean air that has passed through the filter from the top surface of the main body of air purifier 100. As shown in Figures 5 and 6, the interior of the air purifier 100 has a bottom frame 181 located below the filter, a fixed frame 241 located above the filter, an intermediate frame 160 located above the fixed frame 241, and a top frame 170 located inside the top end of the main body.

[0041] As shown by the dotted lines in Figures 6 and 7, the left and right side portions and the front portion of the bottom frame portion 181 are provided with peripheral wall portions 183 that have vertical ribs and rise from the bottom frame portion 181, and the upper end of the peripheral wall portions 183 is connected and fixed to a fixed frame portion 241 formed on the lower end periphery of the lower inner tube 231.

[0042] The bottom frame portion 181, the fixed frame portion 241, and the intermediate frame 160 support the lower side case cover 114 and the front case cover 115, and the lower inner tube 231 and the upper inner tube 251, which guide the outside air drawn in from the bottom of the main body to the exhaust port on the top of the main body, are fixed inside the case cover.

[0043] The lower inner cylinder 231 is supported at its upper end from the front, rear, left and right sides by a rectangular intermediate frame 160 made up of an intermediate rear frame 161, left and right intermediate side frames 163, and an intermediate front frame 165.

[0044] The intermediate rear frame 161 has both ends connected to the ends of the left and right intermediate side frames 163, and the other ends of the left and right intermediate side frames 163 connected to both ends of the intermediate front frame 165, forming a rectangular framework that holds the upper end of the lower inner tube 231, the rear case cover 110, the front case cover 115, etc.

[0045] That is, the intermediate rear frame 161 holds the rear case cover 110, and also holds the upper portion of the lower inner tube 231 and the lower portion of the upper inner tube 251 at the center inside of the intermediate rear frame 161. In addition, the left and right intermediate side frames 163 hold the upper end of the lower side case cover 114 and the lower end of the upper side case cover 113, and also hold the lower inner tube 231 at the center inside of the intermediate side frame 163. Furthermore, the intermediate front frame 165 holds the front case cover 115, and also holds the upper portion of the lower inner tube 231 and the lower portion of the upper inner tube 251 at the center inside of the intermediate front frame 165.

[0046] Furthermore, the intermediate side frame 163 has a rotating shaft (not shown) stored in the support part 141 that protrudes outward, and the main body of the air purifier 100 is attached to the support part 141 so that it can swing and rotate freely relative to the support part 141.

[0047] Furthermore, the lower inner tube 231 has bulges 233 formed at equal intervals in four directions near the lower end of the cylindrical lower inner tube 231, thereby approximating the shape of the lower end of the lower inner tube 231 to a rectangle.The lower inner tube 231 has an extension plate 243 that is flat and extends horizontally outward from the lower end of the lower inner tube 231, which has been deformed from a cylindrical shape.The outer periphery of the extension plate 243 is rectangular, and the extension plate 243 has a fixed frame portion 241 that rises from the outer periphery of the extension plate 243.

[0048] A reinforcing plate 245 is provided on the extension plate 243 to connect the inside of the fixed frame portion 241 with the lower part of the cylindrical main body of the lower inner cylinder 231 .

[0049] The lower part of the rear case cover 110 is fixed to this fixed frame part 241, and the left and right lower side case covers 114 and the front case cover 115 are fixed, and the upper end of the peripheral wall part 183 erected from the bottom frame part 181 is also fixed to the fixed frame part 241.

[0050] Furthermore, the upper end of the rear case cover 110, the upper ends of the left and right upper side case covers 113, and the upper end of the front case cover 115 are fixed to a frame 171 formed on the periphery of a plate-like portion 175 of the top frame 170 shown in Fig. 7. A circular through-hole 177 provided in the center of the plate-like portion 175 has its periphery connected to the upper end of the upper inner tube 251, thereby fixing the upper inner tube 251.

[0051] 7, the interior of the lower inner cylinder 231 is provided with a cylindrical motor cover cylinder 235, which houses a first drive motor 261. The interior of the upper inner cylinder 251 also has an upper motor cover cylinder 255 similar to the motor cover cylinder 235 (see FIG. 5). This upper motor cover cylinder 255 is a cylindrical body that extends upward from the upper end of the motor cover cylinder 235, and is fixed inside the upper inner cylinder 251 by an upper support arm portion 254. The upper motor cover cylinder 255 houses a second drive motor 262.

[0052] That is, the upper motor cover cylinder 255 has the same inner and outer diameters as the motor cover cylinder 235 and extends the cylindrical motor cover cylinder 235 upward. The upper motor cover cylinder 255 is connected to the upper end of the motor cover cylinder 235, and the motor cover cylinder 235 is fixed to the inside of the lower inner cylinder 231 by a support arm portion 239. Furthermore, the motor cover cylinder 235 positions the first drive motor 261 and the first impeller 265 inside the lower inner cylinder 231, and the upper motor cover cylinder 255 positions the second drive motor 262 and the second impeller 267 inside the upper inner cylinder 251.

[0053] The lower end surface of this first drive motor 261 is fixed to the support ring portion 236 of the motor cover cylinder 235, and the first impeller 265 is fixed to the tip of the shaft that passes through the support ring portion 236. This support ring portion 236 is formed at the lower end of the motor cover cylinder 235, and the first drive motor 261 is arranged inside the motor cover cylinder 235, and the first impeller 265 is arranged below the motor cover cylinder 235.

[0054] Additionally, the upper end of the second drive motor 262 is fixed to the upper support ring portion 256, and a second impeller 267 is disposed above the upper support ring portion 256. This upper support ring portion 256 is formed at the upper end of the upper motor cover cylinder 255, and houses the second drive motor 262 inside the upper motor cover cylinder 255, and the second impeller 247 is disposed above the upper motor cover cylinder 255.

[0055] The first impeller 265 is fixed to the shaft of the first drive motor 261 by a first nut 266 with a larger head diameter, and the second impeller 267 is fixed to the shaft of the second drive motor 262 by a second nut 268 with a larger head diameter.

[0056] In this way, the first drive motor 261 is stored inside the motor cover tube 235, and the second drive motor 262 is stored inside the upper motor cover tube 255, while the first drive motor 261 and the first impeller 265 are arranged inside the lower inner tube 231, and the second drive motor 262 and the second impeller 267 are arranged inside the upper inner tube 251.

[0057] Then, the first impeller 265 and the second impeller 267, whose rotating shafts are arranged on the same axis, are rotated in opposite directions, and the air drawn in through holes formed in the reinforcing frame 229 supported by the bottom frame portion 181 is passed through the first filter 221 to the third filter 223, and as clean air, passes through the outer periphery of the motor cover tube 235 and the upper motor cover tube 255, the inside of the lower inner tube 231 and the upper inner tube 251, and is discharged from the top of the main body via the first grill 201 and the second grill 202.

[0058] As shown in Figure 6, the first grille 201 has a slit-shaped ventilation opening with many fins 205 arranged in parallel and reinforced by two bridges 206, and the second grille 202 also has a slit-shaped ventilation opening with many fins 205 arranged in parallel and reinforced by one bridge 206.

[0059] This first grille 201 has a ring-shaped first frame portion 211 around its periphery, and is provided with notches 212 at two symmetrical positions on the first frame portion 211. Each notch 212 has an introduction groove 213 extending in one direction. In addition, two bridges 206 reinforce a large number of fins 205 arranged in parallel, and the fins 205 rectify the air passing through the slits between the fins 205 and discharge it upward.

[0060] The second grill 202 has a ring-shaped second frame portion 215 around it and a protrusion 216 on the underside of the second frame portion 215 that can be fitted into the cutout portion 212 of the first grill 201, and is provided with a locking protrusion 217 on the outer peripheral surface of this protrusion 216.

[0061] Furthermore, the outer peripheral shapes of the first frame portion 211 and the second frame portion 215 are made to match, making it easy to stack the second grille 202 on top of the first grille 201.

[0062] Furthermore, the second grille 202 has a number of fins 205 arranged in parallel reinforced by a single bridge 206, and the air passing through the slits between the fins 205 is straightened by the fins 205 and discharged upward.

[0063] When the protrusion 216 of the second grill 202 is fitted into the cutout 212 of the first grill 201 and the second frame 215 is placed on the first frame 211, the bridges 206 of the first grill 201 and the bridges 206 of the second grill 202 are perpendicular to each other, allowing the first grill 201 and the second grill 202 to be placed on top of each other.

[0064] In addition, the top case cover 117 has an opening in the center that can store the first grill 201 and the second grill 202, and is provided with a grill storage wall 121 around the opening that matches the outer diameter of the first grill 201 and the second grill 202, i.e., the shape of the first frame portion 211 and the second frame portion 215, and the lower end of the grill storage wall 121 is provided with a grill receiving portion 123 that protrudes slightly inward, making it possible to attach the top case cover 117 to store the first grill 201 and the second grill 202 in the center.

[0065] Then, for the first grill 201 and the second grill 202, first, align the cutout portion 212 of the first grill 201 with the position of the engagement protrusion 125 formed on the top case cover 117, and then place the first frame portion 211 of the first grill 201 on the grill receiving portion 123 of the top case cover 117.

[0066] Furthermore, by placing the protrusion 216 with the locking protrusion 217 of the second grill 202 in the guide groove 213 of the first grill 201 and then rotating the second grill 202 on the first grill 201, the locking protrusion 217 is positioned below the engaging protrusion 125, preventing the second grill 202 from coming off the top case cover 117. In this way, the first grill 201 and the second grill 202 placed on the top surface of the first grill 201 can be prevented from coming off the top case cover 117.

[0067] An engaging protrusion 125 is provided on a part of the grill storage wall 121, and the position of the notch 212 of the first frame portion 211 is aligned with the engaging protrusion 125, and the locking protrusion 217 is positioned below the engaging protrusion 125 to engage with the engaging protrusion 125, so that a sensor (not shown) detects that the first grill 201 and the second grill 202 have been fixed to the top case cover 117.

[0068] Furthermore, a sensor also detects whether the filter cover part 111 is attached to the specified position on the rear side of the air purifier 100, i.e., whether the filter is set in the main body, and if the first grill 201, the second grill 202 or the filter cover part 111 is not attached correctly, the air purifier 100 will not operate even if the power switch is operated.

[0069] Furthermore, although the first grill 201 and the second grill 202 shown in the drawings of this air purifier are circular grills having circular vent shapes, the first grill 201 and the second grill 202 may also be rectangular, as shown in FIG. 8.

[0070] In this case, as shown in Figure 8, a grill storage wall 121 is provided in the vertical direction on the top case cover 113 so as to form a rectangular recess that matches the rectangular outer shape of the top case cover 113, a grill receiving portion 123 is formed so as to extend inward from the lower end of the grill storage wall 121, and an opening is formed in the center of the grill receiving portion 123.

[0071] This opening has a shape and size that matches the shape of the top end of the upper inner cylinder 251 and the through hole 177 of the upper frame 170, so as to form an air exhaust port.

[0072] As shown in Figures 8 and 9, the shapes of the first grill 201 and the second grill 202 are also rectangular to match the shape of the grill storage wall 121, and a first frame portion 211 is provided around the first grill 201 and a second frame portion 215 is provided around the second grill 202.The first frame portion 211 and the second frame portion 215 are inserted inside the grill storage wall 121 and placed on the grill receiving portion 123.

[0073] An engagement hole 127 is provided in the grill receiving portion 123, and an insertion engagement portion 214 is provided on the underside of the first grill 201 to engage with this engagement hole 127 when the first grill 201 is inserted inside the grill storage wall 121.

[0074] Furthermore, one side of the grill storage wall 121 is provided with a plurality of locking holes 128, and the opposing side is provided with one locking hole 128. On the outer periphery of the second frame portion 215 of the second grill 202, one side of the second frame portion 215 is provided with a plurality of locking protrusions 217 that engage with the plurality of locking holes 128, the number of which corresponds to the number of locking holes 128, and the opposing side is provided with one locking protrusion 217 that engages with one locking hole 128.

[0075] Furthermore, one locking protrusion 217 provided on the side opposite to the side on which the multiple locking protrusions 217 are provided has an inclined underside, making it easy to engage one locking protrusion 217 with one locking hole 128 when first inserting the multiple locking protrusions 217 into each of the multiple locking holes 128 and fitting the second grill 202 inside the grill storage wall 121 of the top case cover 113.

[0076] Then, the first grill 201 is fitted inside the grill storage wall 121 of the top case cover 113 by aligning the insertion engagement portion 214 of the first grill 201 with the engagement hole 127 of the grill receiving portion 123, and the second grill 202 is fitted inside the grill storage wall 121 so as to be placed on top of it, and when the second grill 202 is attached to the top case cover 113 by the locking protrusion 217, the long axis direction of the slit in the first grill 201 and the long axis direction of the slit in the second grill 202 are made perpendicular to each other.

[0077] The first grille 201 shown in the drawing has slits formed by arranging a large number of fins 205 in parallel without providing bridges 206, and the second grille 202 placed above the first grille 201 has slits formed by a large number of fins 205 reinforced by two bridges 206.

[0078] In this way, the air purifier 100 of this embodiment purifies the air drawn in from the bottom of the main body using filters such as the first filter 221 to the third filter 223, passes the air through the inside of the lower inner tube 231 and the upper inner tube 251 using the first impeller 265 and the second impeller 267, which rotate in opposite directions, and discharges the clean air from the top surface of the main body, where the round and square first grill 201 and second grill 202 are arranged.

[0079] In this first grill 201, when clean air passes through the slit-shaped gaps, the fins 205 prevent the exhaust air from diffusing in the short axis direction of the slits, and although diffusion in the long axis direction of the slits remains, since the slit-shaped gaps of the second grill 202 are arranged in a direction that intersects with the slit-shaped gaps of the first grill 201, the air flow in the diffusing direction in the first grill 201 is prevented from diffusing by the fins 205 of the second grill 202.

[0080] In this way, in the air purifier 100, the counter-rotating impellers produce an efficient and less agitated airflow that flows undisturbed inside the lower inner cylinder 231 and the upper inner cylinder 251, outside the motor cover cylinder 235 and the upper motor cover cylinder 255, and is discharged to the first grill 201. Furthermore, the airflow discharged from the upper inner cylinder 251 is rectified when passing through the slits of the first grill 201 and the second grill 202, and the clean air discharged from the air purifier 100 with reduced diffusion due to the rectification can be released far away from the air purifier 100, making it possible to deliver clean air over a wide area.

[0081] Furthermore, when the air exhaust parts such as the first grill 201 and the second grill 202 become dirty, when the first grill 201 and the second grill 202 are removed from the main body, the air flow paths of the first grill 201 and the second grill 202 are slit-shaped, and the round first grill 201 and the square second grill 202 only have two bridges 206, and the round second grill 202 also only has one bridge 206, it becomes easy to clean the fins 205 and bridges 206, and it becomes easy to clean the air exhaust parts of the air purifier 100 and keep the area around the air exhaust port clean.

[0082] Furthermore, even if the gaps between the first grill 201 and the second grill 202 are slit-shaped, when the first grill 201 and the second grill 202 are stacked, the longitudinal axis directions of the slits intersect, so the air flow path that connects the outside and inside of the air purifier 100 becomes a mesh-like through-hole, which can prevent fingers or foreign objects from entering.

[0083] When the first grill 201 and the second grill 202 are removed from the main body, the second impeller 267, which is fixed to the shaft of the second drive motor 262 by the second nut 268, is located immediately adjacent to the opening of the top case cover 117, so the second impeller 267 can be easily removed by rotating the second nut 268, which has a larger head diameter.

[0084] Furthermore, when the filter cover part 111 and the first filter 221 to the third filter 223 behind the filter cover part 111 are removed from the main body, the first impeller 265 fixed to the shaft of the first drive motor 261 by the first nut 266 is located directly above the space in front of the opening of the filter cover part 111, and the first impeller 265 can be easily removed by rotating the first nut 266, which has a larger head diameter.

[0085] In this way, in this air purifier 100, first grill 201 and second grill 202 can be easily cleaned, and first impeller 265 and second impeller 267 can also be easily removed and cleaned.

[0086] In this air purifier 100, a sensor detects whether the filter cover part 111, the first grill 201, and the second grill 202 are securely attached, and if the filter cover part 111, the first grill 201, and the second grill 202 are not attached, the air purifier 100 will not operate even if the operation switch is turned on, thereby ensuring safety.

[0087] Although two bridges 206 are provided on the round first grille 201 and the rectangular second grille 202, the round first grille 201 and the rectangular second grille 202 may have only one bridge 206. Furthermore, the first grille 201 and the second grille 202 may have slits formed only by the fins 203, and the bridges 206 may be omitted, as in the rectangular first grille 201.

[0088] In addition, in the round first grill 201 and second grill 202, the cutout portion 212 formed in the first frame portion 211 of the first grill 201 and the protrusion portion 216 formed in the second frame portion 215 of the second grill 202 are engaged with each other to ensure that the long axis direction of the slits in the first grill 201 and the long axis direction of the slits in the second grill 202 always form a constant crossing angle.However, it is also possible to ensure that the direction of the first grill 201 and the direction of the second grill 202 always have a constant directional relationship by forming at least one engaging portion such as a protrusion or recess on the frame portion of the first grill 201 and forming an engaged portion such as a recess or protrusion on the frame portion of the second grill 202 that engages with the engaging portion of the first grill 201.

[0089] Furthermore, in the case of a round grill, the cutout portion 212 of the first grill 201 and the long axis direction of the slit, or the protrusion 216 of the second grill 202 and the long axis direction of the slit, do not necessarily have to be perpendicular to the long axis direction of the slit of the first grill 201 and the long axis direction of the slit of the second grill 202, but the long axis directions of both grills can simply intersect, thereby preventing the diffusion of air that has passed through both grills while preventing the intrusion of foreign matter.

[0090] Furthermore, even in the case of rectangular grilles, the long axis direction of the slits and the direction of the straight portion of the frame are inclined, so that the long axis directions of the slits of the first grille 201 and the long axis directions of the slits of the second grille 202 are not necessarily perpendicular to each other, but may simply intersect. [Industrial Applicability]

[0091] In air purifier 100 according to the present invention, first grill 201 and second grill 202 each having an air outlet with slit-shaped gaps are stacked so that the longitudinal axis of the slits intersect, so that the air flow portion of the grill is mesh-like and the exhaust air can reach a long distance without diffusing. Furthermore, when the grills are removed, the gaps that form the air flow portion are slit-shaped, so that cleaning of the grills is easy and not only the air inlet portion but also the air outlet portion can be kept clean for a long period of time. [Explanation of symbols]

[0092] 100 Air Purifier 110 Rear case cover 111 Filter cover 113 Upper side case cover 114 Lower side case cover 115 Front case cover 117 Top case cover 121 Grill storage wall 123 Grill holder 125 Engagement protrusion 127 Engagement hole 128 Locking hole 131 Lever 135 Stopper protrusion 141 Support part 143 Groove part 147 Sensor cover 150 Legs 151 1st support section 153 2nd support section 155 Curved portion 157 Ground connection portion 159 Ground end 160 Intermediate Frame 161 Middle rear frame 163 Middle side frame 165 Intermediate forward frame 170 Top Frame 171 Frame body 175 Plate-shaped portion 177 Through hole 181 bottom frame portion 183 peripheral wall portion 201 1st Grill 202 2nd Grill 205 Fin 206 Bridge 211 First frame part 212 Notch part 213 Introduction groove portion 214 Insertion engagement portion 215 Second frame portion 216 Projection portion 217 Locking protrusion 221 1st filter 222 2nd filter 223 Third Filter 225 Filter case 226 Rail groove 227 Filter holder frame 228 Cushioning material 229 Reinforcement Frame 231 Lower inner cylinder 233 Swelling part 235 Motor cover tube 236 Support ring part 239 Support arm 241 Fixed frame part 243 Extension plate 245 Reinforcement plate 251 Upper inner cylinder 254 Upper support arm 255 Upper motor cover tube 256 Upper support ring part 261 First drive motor 262 Second drive motor 265 First impeller 266 First nut 267 Second impeller 268 Second nut

Claims

1. It has a filter, a drive motor, and a rotating fan, The air purifier is configured to purify the air drawn into the main body by the filter and then discharge the air through the vent of the grill, The grills are arranged such that a first grill and a second grill are stacked on top of each other, the first grill and the second grill form the ventilation holes by a number of parallel slits; An air purifier, characterized in that the long axis direction of the slits of the first grill and the long axis direction of the slits of the second grill are arranged to intersect.

2. The air purifier according to claim 1, characterized in that the frame portion of one of the grilles formed around the first grill and the second grill has an engaging portion, and the frame portion formed around the other grill has an engaged portion that engages with the engaging portion.

3. The air purifier according to claim 1, characterized in that the top case cover, which has a grill storage wall and a grill receiving portion that stores the first grill and the second grill, has an engagement hole in the engagement receiving portion into which the insertion engagement portion of the first grill is inserted, and has an engagement hole in the grill storage wall into which the engagement protrusion of the second grill is inserted.

4. The air purifier according to claim 2, wherein a longitudinal direction of the slits of the first grille and a longitudinal direction of the slits of the second grille are perpendicular to each other.

5. the rotary fan includes a first impeller rotated by a first drive motor and a second impeller rotated by a second drive motor; The air purifier according to claim 1, wherein the first impeller and the second impeller have the same rotation axis and rotate in opposite directions.

6. 6. The air purifier according to claim 1, wherein the rotary fan is attached to the rotary shaft of the drive motor in an easily detachable manner.

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