blower

Abstract

A blower device (10) comprises: a housing (20) that has an air inlet (281) and an air outlet (291); an air filter (40) that is disposed at a position where the air filter (40) overlaps with the air inlet (281) of the housing (20) when the air inlet (281) is viewed from the front; and a filter cover (30) that holds the air filter (40) and that is disposed at a position where the filter cover (30) overlaps with the air filter (40) when the air inlet (281) is viewed from the front. The filter cover (30) includes a plurality of posts (321-323) that are spaced apart from each other. The posts (321-323) include projections (321P, 323P) that project toward the air filter (40). The filter cover (30) is fixed to the housing (20) in a state in which the projections (321P, 323P) are in contact with the air filter (40) and portions of the plurality of posts (321-323) other than the projections (321P, 323P) are apart from the air filter (40).

Description

[Technical Field]

[0001] The present invention relates to a technology for discharging clean gas from an intake port. [Background technology]

[0002] Patent Document 1 describes a flow generator equipped with a filter cartridge. The filter cartridge includes a flat air filter and a grill member.

[0003] The grill member has a plurality of pillars with gaps (slits) between them. The pillars of the grill member abut against the air filter. With this structure, the grill member holds the air filter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-18868 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the conventional technology disclosed in Patent Document 1, gas is difficult to pass through the air filter where the air filter and the columns abut against each other, which reduces the effective cross-sectional area of ​​the filter including the air filter, and reduces the filtering function.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a structure that can hold an air filter without reducing the effective area of ​​the filter. [Means for solving the problem]

[0007] The air blower according to the present invention includes a housing having an air intake port and an exhaust port, an air filter disposed in a position overlapping the air intake port of the housing when viewed from the front of the air intake port, and a filter cover disposed in a position overlapping the air filter when viewed from the front of the air intake port and holding the air filter. The filter cover includes a plurality of pillars disposed at intervals from each other. The pillars have protrusions that protrude toward the air filter. The filter cover is fixed to the housing with the protrusions abutting the air filter and with the portions of the plurality of pillars other than the protrusions separated from the air filter.

[0008] In this configuration, the multiple pillars of the filter cover contact the air filter only at their protrusions. This creates a space between the multiple pillars and the air filter in areas other than the protrusions, and air also flows through this space. In other words, even if the pillars and the air filter overlap in areas other than the protrusions when viewed from the front, air also flows through this part of the air filter (the part that overlaps the pillars in front view), and the air filter functions as a filter. [Effects of the Invention]

[0009] According to this invention, the air filter can be held without reducing the effective area of ​​the filter. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view showing the appearance of a blower according to an embodiment of the present invention. [Figure 2] FIG. 2(A) is a view of the blower according to the embodiment of the present invention as seen from the front side, and FIG. 2(B) is a view of the blower according to the embodiment of the present invention as seen from the top side. [Figure 3] Figures 3(A) and 3(B) are perspective views of the filter cover, where Figure 3(A) is a view from the front side and Figure 3(B) is a view from the back side. [Figure 4]Figure 4(A) is a view of the filter cover from the front side, Figure 4(B) is a view of the filter cover from the back side, Figure 4(C) is a view of the filter cover from the top side, and Figure 4(D) is a view of the filter cover from the bottom side. [Figure 5] FIG. 5 is a perspective view of an air intake port forming member that forms an air intake port of the housing. [Figure 6] FIG. 6(A) is a front view of the air filter, and FIG. 6(B) is a side view of the air filter. [Figure 7] Figure 7(A) is a cross-sectional view of an air filter holding structure having the configuration of this embodiment, viewed from above, and Figure 7(B) is a cross-sectional view of an air filter holding structure not having the configuration of this embodiment, viewed from above. [Figure 8] Figures 8(A) and 8(B) are cross-sectional views of an air filter holding structure according to the configuration of this embodiment, viewed from the side, and Figure 8(C) is a cross-sectional view of an air filter holding structure according to the configuration of this embodiment (a structure having multiple protrusions), viewed from the side, in which the air filter is clamped between multiple pillars. DETAILED DESCRIPTION OF THE INVENTION

[0011] A blower according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an external perspective view of a blower according to an embodiment of the present invention. Fig. 2(A) is a view of the blower according to an embodiment of the present invention as seen from the front side, and Fig. 2(B) is a view of the blower according to an embodiment of the present invention as seen from the top side. Note that the terms front and top (including the back and bottom, which will be described later) are used for the convenience of explanation and do not limit the use of the blower.

[0012] As shown in FIGS. 1, 2(A), and 2(B), the blower 10 includes a housing 20, a filter cover 30, and an air filter 40.

[0013] The housing 20 has a substantially rectangular parallelepiped shape and includes a top wall 201, a bottom wall 202, a front wall 203, a rear wall 204, a side wall 205, and a side wall 206. The top wall 201 and the bottom wall 202 face each other. The front wall 203 and the rear wall 204 face each other. The side wall 205 and the side wall 206 face each other.

[0014] The front wall 203, the rear wall 204, the side wall 205, and the side wall 206 are connected to the peripheries of the top wall 201 and the bottom wall 202. This allows the housing 20 to have an internal space 200 surrounded by the front wall 203, the rear wall 204, the side wall 205, and the side wall 206.

[0015] Front wall 203 has air intake port 281 and air exhaust port 291. Air intake port 281 and air exhaust port 291 penetrate front wall 203 in the thickness direction. Internal space 200 of housing 20 communicates with the external space of housing 20 via air intake port 281 and air exhaust port 291.

[0016] An exhaust path 290 is provided in the front wall 203. The exhaust path 290 is shaped to protrude from the outer surface of the front wall 203. The central opening of the exhaust path 290 is connected to an exhaust port 291 formed in the front wall 203, and this portion also functions as the exhaust port 291.

[0017] Air filter 40 is disposed in housing 20 at a position overlapping air intake port 281 when air intake port 281 is viewed from the front.

[0018] Filter cover 30 is installed on front wall 203 of housing 20 at a position that overlaps air intake 281 in which air filter 40 is arranged when looking at air intake 281 from the front. As will be described in detail later, filter cover 30 has slits formed by multiple pillars, and the multiple slits allow ventilation.

[0019] Then, parts of the filter cover 30 (the protrusions of the pillars and the frame) come into contact with the air filter 40 , so that the air filter 40 is held in the housing 20 .

[0020] Although not shown, a blower is disposed inside the housing 20. The blower is driven and stopped by operating an operation button 90 on the top wall 201 of the housing 20. When driven, the blower draws gas from the outside of the housing 20 into the internal space 200 through the air intake 281, and exhausts the gas from the internal space 200 to the outside of the housing 20 through the air exhaust 291.

[0021] At this time, dust and the like contained in the gas is filtered out as the gas passes through the filter cover 30 and the air filter 40. Therefore, the blower 10 can exhaust gas of a desired cleanliness from the exhaust port 291.

[0022] (Filter cover 30) Figures 3(A) and 3(B) are perspective views of the filter cover. Figure 3(A) is a view from the front side, and Figure 3(B) is a view from the back side. Figure 4(A) is a view of the filter cover from the front side, Figure 4(B) is a view of the filter cover from the back side, Figure 4(C) is a view of the filter cover from the top side, and Figure 4(D) is a view of the filter cover from the bottom side.

[0023] As shown in Figures 3(A), 3(B), 4(A), 4(B), 4(C), and 4(D), the filter cover 30 comprises a frame body 31, a plurality of pillars 321-323, a plurality of slits 340 (openings), and a hinge portion 39.

[0024] The frame 31 has an oval shape when viewed from the front. However, the shape of the frame 31 is not limited to this, and is determined according to the shape of a recess 2811 (see FIG. 5) formed in an air intake port 281 of the housing 20, which will be described later, and which houses the air filter 40 and the filter cover 30.

[0025] The multiple pillars 321-323 are arranged in a space surrounded by the frame body 31. More specifically, the multiple pillars 321-323 extend in the horizontal direction when viewing the filter cover 30 from the front. The horizontal direction is the direction parallel to the straight line portion of the oval, and corresponds to the "first direction" of the present invention.

[0026] The multiple pillars 321-323 are arranged at intervals in the vertical direction when viewing the filter cover 30 from the front. Pillar 321 is adjacent to the lower straight portion of the frame body 31 at an interval, and pillar 322 is adjacent to pillar 321 at an interval. Pillar 323 is adjacent to pillar 322 at an interval, and is also adjacent to the upper straight portion of the frame body 31 at an interval.

[0027] The distance between the lower straight portion of frame body 31 and pillar 321, the distance between pillar 321 and pillar 322, the distance between pillar 322 and pillar 323, and the distance between pillar 323 and the upper straight portion of frame body 31 are the same. Note that these distances do not have to be the same, but it is preferable that they are the same.

[0028] A plurality of protrusions 321P are formed on the pillar 321. The plurality of protrusions 321P are shaped to partially protrude from the back surface of the pillar 321. The plurality of protrusions 321P are formed at intervals PP in the direction in which the pillar 321 extends.

[0029] The intervals PP between the plurality of protrusions 321P are set so that the plurality of protrusions 321P are arranged at equal intervals between both ends of the opening of the frame 31, with the longest part in the horizontal direction being the both ends.

[0030] A plurality of protrusions 323P are formed on the pillar 323. The plurality of protrusions 323P are shaped to partially protrude from the back surface of the pillar 323. The plurality of protrusions 323P are formed at intervals PP in the direction in which the pillar 323 extends.

[0031] The intervals PP between the plurality of protrusions 323P are set so that the plurality of protrusions 323P are arranged at equal intervals between both ends of the opening of the frame 31 that are the longest in the horizontal direction.

[0032] The intervals PP between the plurality of protrusions 321P and the intervals PP between the plurality of protrusions 323P are the same, but may be different depending on the positions of the pillars 321 and 323 within the opening of the frame 31.

[0033] A handle 322H is formed on the pillar 322. The handle 322H has a shape that protrudes toward the surface side beyond the central axis of the pillar 322. The back surface of the handle 322H is recessed. The handle 322H can be omitted.

[0034] The hinge portion 39 is formed at one lateral end of the frame body 31. The hinge portion 39 has a shape that protrudes from one lateral end of the frame body 31. Although not shown, the hinge portion 39 is provided with a member that enables the filter cover 30 to rotate relative to the housing 20.

[0035] (The intake port 281 of the housing 20) Fig. 5 is a perspective view of an air intake port forming member that forms an air intake port of the housing. As shown in Fig. 5, air intake port forming member 280 includes a cylindrical body 2801 and a wall surface forming member 2802. Wall surface forming member 2802 is connected to one open end of cylindrical body 2801. This wall surface forming member 2802 forms a part of front wall 203 of housing 20.

[0036] Wall surface forming member 2802 has recess 2811, which communicates with through hole 2812 of cylindrical body 2801. Recess 2811 and through hole 2812 form intake port 281.

[0037] An oval pedestal 283 is formed in the recess 2811. The shape of the pedestal 283 when viewed from the front is substantially the same as the outer shape of the air filter 40 and the outer shape of the frame body 31.

[0038] In the space inside the base 283 when the wall surface forming member 2802 is viewed from the front, a plurality of housing side pillars 2821-2823 are formed.

[0039] The multiple housing side columns 2821-2823 extend in the horizontal direction when the wall surface forming member 2802 is viewed from the front. The horizontal direction is the direction parallel to the straight line portion of the ellipse of the base 283.

[0040] The multiple housing side columns 2821-2823 are arranged at intervals in the vertical direction when viewing the wall surface forming member 2802 from the front. Housing side column 2821 is adjacent to the lower straight section of base 283 at an interval, and housing side column 2822 is adjacent to housing side column 2821 at an interval. Housing side column 2823 is adjacent to housing side column 2822 at an interval, and is adjacent to the upper straight section of base 283 at an interval.

[0041] The distance between the lower straight portion of base 283 and housing side column 2821, the distance between housing side column 2821 and housing side column 2822, the distance between housing side column 2822 and housing side column 2823, and the distance between housing side column 2823 and the upper straight portion of base 283 are the same.

[0042] The distance between the lower straight portion of base 283 and housing side column 2821 is the same as the distance between the lower straight portion of frame 31 and column 321, and the distance between housing side column 2821 and housing side column 2822 is the same as the distance between column 321 and column 322. The distance between housing side column 2822 and housing side column 2823 is the same as the distance between column 322 and column 323, and the distance between housing side column 2823 and the upper straight portion of base 283 is the same as the distance between column 323 and the upper straight portion of frame 31.

[0043] A plurality of housing side protrusions 2821P are formed on housing side pillar 2821. The plurality of housing side protrusions 2821P are shaped to partially protrude from the front surface of housing side pillar 2821. The plurality of housing side protrusions 2821P are formed at intervals in the direction in which housing side pillar 2821 extends.

[0044] The spacing between the multiple housing side protrusions 2821P is set so that the multiple housing side protrusions 2821P are arranged at equal intervals between both ends, with the longest part in the horizontal direction of the opening of the base 283 as the ends. The spacing between the multiple housing side protrusions 2821P is the same as the spacing PP between the multiple protrusions 321P of the filter cover 30.

[0045] A plurality of housing side protrusions 2822P are formed on the housing side pillar 2822. The plurality of housing side protrusions 2822P are shaped to partially protrude from the front surface of the housing side pillar 2822. The plurality of housing side protrusions 2822P are formed at intervals in the extension direction of the housing side pillar 2822. Note that in a configuration using the filter cover 30 configured as described above, the plurality of housing side protrusions 2822P may be omitted.

[0046] A plurality of housing side protrusions 2823P are formed on the housing side pillar 2823. The plurality of housing side protrusions 2823P are shaped to partially protrude from the front surface of the housing side pillar 2823. The plurality of housing side protrusions 2823P are formed at intervals in the direction in which the housing side pillar 2823 extends.

[0047] The spacing between the multiple housing side protrusions 2823P is set so that the multiple housing side protrusions 2823P are arranged at equal intervals between both ends, with the longest part in the horizontal direction of the opening of the base 283 as the ends. The spacing between the multiple housing side protrusions 2823P is the same as the spacing PP between the multiple protrusions 323P of the filter cover 30.

[0048] The recess 284 has a shape that allows the hinge portion 39 of the filter cover 30 to be housed therein.

[0049] (Air filter 40) FIG. 6(A) is a front view of the air filter, and FIG. 6(B) is a side view of the air filter.

[0050] 6(A) and 6(B), air filter 40 has main surfaces 401 and 402, and is oval in shape when viewed from the front. The shape of air filter 40 when viewed from the front may be determined based on the shape of the installation position of air filter 40 in air intake port 281.

[0051] The air filter 40 is a fiber filter made of, for example, nonwoven fabric, and has a porous structure, which gives the air filter 40 a predetermined degree of elasticity.

[0052] Specifically, the air filter 40 is made of at least one of the following materials. Nonwoven fabrics (polyester, polypropylene, polyethylene, rayon, nylon, wool, cotton, glass fiber) Sponge type (urethane filter) Felt Air filter 40 has a thickness D40s when no external force is applied to press main surfaces 401 and 402 together.

[0053] (Air filter holding structure) Figure 7(A) is a cross-sectional view of an air filter holding structure having the configuration of this embodiment, viewed from above, and Figure 7(B) is a cross-sectional view of an air filter holding structure not having the configuration of this embodiment, viewed from above.

[0054] Figures 8(A) and 8(B) are cross-sectional views of an air filter holding structure according to the configuration of this embodiment, viewed from the side, and Figure 8(C) is a cross-sectional view of an air filter holding structure according to the configuration of this embodiment (a structure having multiple protrusions), viewed from the side, in which the air filter is clamped between multiple pillars.

[0055] Air filter 40 is housed in recess 2811 of air intake port forming member 280 of housing 20. At this time, the periphery of air filter 40 abuts against base 283.

[0056] The filter cover 30 is housed and fixed in the recess 2811 of the air intake port forming member 280 of the housing 20. At this time, the filter cover 30 is fixed to the recess 2811 by the hinge portion 39 being rotatably fixed to the recess 284.

[0057] The air filter 40 is disposed between the filter cover 30 and the air intake port forming member 280 (base 283). At this time, the air filter 40 is sandwiched between the frame 31 of the filter cover 30 and the base 283. This holds the periphery of the air filter 40.

[0058] Due to the pressing force of this sandwiching, the thickness D40pu of the air filter 40 becomes smaller than the thickness (maximum thickness) D40s when no external force is applied.

[0059] 7(A) and 8(A), in the configuration of the present invention, a plurality of protrusions 321P (as well as a plurality of protrusions 323P) abut against main surface 401 of air filter 40. Similarly, a plurality of housing-side protrusions 2821P (as well as a plurality of housing-side protrusions 2823P) abut against main surface 402 of air filter 40.

[0060] Here, protrusion 321P and housing-side protrusion 2821P overlap when air intake port 281 is viewed from the front. Therefore, air filter 40 is sandwiched between protrusion 321P and housing-side protrusion 2821P. As a result, thickness D40p0 of air filter 40 at this sandwiched portion is the distance between the tip surface of protrusion 321P and the tip surface of housing-side protrusion 2821P.

[0061] At this time, by appropriately setting the height at which the filter cover 30 is accommodated in the recess 2811, the protruding height of the protrusion 321P, and the protruding height of the housing side protrusion 2821P, the thickness D40p0 of the air filter 40 at the clamped portion becomes smaller than the thickness D40s when no external force is applied.

[0062] 7(A), for example, the non-clamped portions of air filter 40 are not as thin as the clamped portions, and have a maximum thickness D40pf of the non-contact portion. However, by appropriately setting the protruding height of protrusion 321P, the protruding height of housing-side protrusion 2821P, the arrangement interval between multiple protrusions 321P, and the arrangement interval between multiple housing-side protrusions 2821P, the portions of air filter 40 that are not clamped between protrusion 321P and housing-side protrusion 2821P do not come into contact with intake port forming member 280 and pillar 321 of filter cover 30 (the same applies to pillars 322, 323 of filter cover 30).

[0063] Here, air is less likely to flow into the areas where air filter 40 abuts against the pillars 321-323 and the housing side pillars 2821-2823, and these areas become filter function-reducing areas ZnNF, which reduce the filter function. Therefore, the smaller the area of ​​the filter function-reducing areas ZnNF, the larger the effective area of ​​the filter can be.

[0064] As described above, by providing the configuration of the present invention, the filter function-reduced portions ZnNF are limited to the portions sandwiched between the protrusions and the housing-side protrusions in the air filter 40. Therefore, the air blower 10 can reduce the filter function-reduced portions ZnNF and increase the effective area of ​​the filter.

[0065] This allows the air blower 10 to achieve an excellent filtering function while compressing and holding the air filter 40 in the thickness direction. In other words, the air blower 10 can achieve an excellent filtering function while keeping the shape of the installation location of the air filter 40 thin (small).

[0066] Furthermore, as shown in Figures 7(A), 8(A), and 8(B), the blower device 10 can form a space 390 between the air filter 40 and the multiple pillars 321-323 (upstream side of the air filter 40), which expands excluding the multiple protrusions.

[0067] This allows the air blower 10 to temporarily collect dust and the like that has passed through the filter cover 30 in the space 390 before it enters the air filter 40. When viewed from the front, the portions of the air filter 40 that overlap with the plurality of pillars 321-323, excluding the plurality of protrusions 321P, 323P, function as a filter.

[0068] Therefore, the air blower 10 can filter the gas containing dust and the like temporarily accumulated in the space 390 even at the portions of the air filter 40 that overlap with the pillars 321-323, excluding the projections 321P and 323P. This allows the air blower 10 to achieve an even more excellent filtering function.

[0069] 7(B), in a structure in which a pillar 321X without multiple protrusions 321P is used and air filter 40 is held only by its peripheral portion, air filter 40 comes into contact with pillar 321X over a large area (the same applies to pillar 323X without multiple protrusions 323P, not shown). This is because air filter 40 is elastic, and even if the peripheral portion is held down, the thickness of the unheld central portion does not decrease, and remains thicker than the peripheral portion.

[0070] As described above, the portions of the air filter 40 that contact the pillars 321X and the housing side pillars 2821X are the filtering function reduced portions ZnNF. Therefore, in the structure shown in Fig. 7(B), the filtering function reduced portions ZnNF are large. As a result, in the structure shown in Fig. 7(B), the effective filter area is small, and the filtering function is reduced.

[0071] Furthermore, in a structure in which the air filter 40 is sandwiched between multiple pillars 321-323 and multiple housing side pillars 2821-2823 as shown in Fig. 8(B), the air filter 40 is in contact with the entirety of the multiple pillars 321-323 and multiple housing side pillars 2821-2823. Therefore, in the structure shown in Fig. 8(B), the filter function reduction portion ZnNF becomes large. As a result, in the structure shown in Fig. 8(B), the effective filter area becomes small, and the filter function is reduced.

[0072] In this way, by having the above-described configuration, the blower device 10 can achieve an excellent filtering function while keeping the shape of the installation location of the air filter 40 thin (small), which is not possible in the comparative example.

[0073] Furthermore, in blower device 10, multiple protrusions and multiple housing-side protrusions are arranged at equal intervals in the width direction in which the gas is drawn in (the longitudinal direction when viewed from the front of air intake port 281). This reduces variation in the gas flow in the longitudinal direction when viewed from the front of air intake port 281. Therefore, blower device 10 can achieve a more efficient filtering effect with less variation in the longitudinal direction.

[0074] In the above configuration, the filter cover 30 has been described as having a plurality of horizontally elongated slits. However, the shape of the filter cover 30 is not limited to this, and may be, for example, a lattice shape, a shape with a plurality of openings, or the like.

[0075] Furthermore, in the above-described blower device 10, a configuration has been shown in which protrusions are provided on both the filter cover 30 and the air intake port forming member 280. However, it is sufficient for the blower device 10 to have a protrusion on at least the filter cover 30. In other words, the protrusion on the air intake port forming member 280 can be omitted.

[0076] Furthermore, the blower 10 shown in this embodiment is used, for example, as a CPAP device (a device used for nasal continuous positive airway pressure therapy). There is currently a demand for miniaturization of CPAP devices. Therefore, by applying the blower 10 shown in this embodiment to a CPAP device, the CPAP device can be made smaller. This is effective in making the CPAP device easier to carry around.

[0077] However, the blower 10 is not limited to a CPAP device, and can be applied to any device that draws in gas from the atmosphere or the like and exhausts gas of a desired purity.

[0078] In addition, in the air blower 10, the filter cover 30 has multiple pillars arranged at intervals to form an air flow path. However, the filter cover 30 may be a plate or the like having multiple holes formed therein to form the air flow path, in which case the portions of the plate without the multiple holes correspond to the pillars of the present invention.

[0079] <1> a housing having an intake port and an exhaust port; an air filter disposed at a position overlapping the air intake port of the housing when the air intake port is viewed from the front; a filter cover that is disposed at a position overlapping the air filter when the air intake port is viewed from the front and that holds the air filter; Equipped with the filter cover includes a plurality of spaced apart posts; The pillar has a protrusion that protrudes toward the air filter, The filter cover is fixed to the housing with the protrusions abutting against the air filter and with the portions of the pillars other than the protrusions spaced apart from the air filter.

[0080] <2> The maximum thickness of the air filter when the filter cover is in contact with the air filter is smaller than the maximum thickness when the filter cover is not in contact with the air filter. <1> Blower.

[0081] <3> The pillar includes a plurality of the protrusions, The plurality of protrusions are disposed at equal intervals between both ends of the air intake port in a first direction when the air intake port is viewed from the front. <1> or <2> Blower.

[0082] <4> the filter cover includes a frame body surrounding the plurality of columns, The frame abuts against a peripheral portion of the air filter to hold the air filter in the housing. <1> ~ <3> Any of the above blower devices.

[0083] <5> The housing includes: A plurality of housing side pillars are provided within the intake port, the plurality of housing side columns each include a housing side protrusion, the protrusion of the filter cover and the housing-side protrusion are disposed at positions that overlap when the air intake port is viewed from the front; <1> ~ <4> Any of the above blower devices. [Explanation of symbols]

[0084] 10: Air blower 20: Cabinet 30: Filter cover 31:Frame body 39: Hinge part 40:Air filter 90: Operation button 200: Interior space 201:Top wall 202: Bottom wall 203: Front wall 204: Back wall 205: Side wall 206: Side wall 280: Air intake forming member 281: Air intake 283: Pedestal 284: Recess 290: Exhaust duct 291: Exhaust port 321, 322, 323: Pillars 321P, 323P: Protrusion 322H: Handle 340: Slit 390: Space 401, 402: Main surfaces 2801: Cylindrical body 2802: Wall forming members 2811: Recess 2812:Through hole 2821, 2822, 2823: Housing side columns 2821P, 2822P, 2823P: Protrusion on the housing side ZnNF: Filter function deteriorated area

Claims

1. a housing having an intake port and an exhaust port; an air filter disposed at a position overlapping the air intake port of the housing when the air intake port is viewed from the front; a filter cover that is disposed at a position overlapping the air filter when the air intake port is viewed from the front and that holds the air filter; Equipped with the filter cover includes a plurality of spaced apart posts; The pillar has a protrusion that protrudes toward the air filter, the housing includes a plurality of housing side pillars within the intake port; the plurality of housing side columns each include a housing side protrusion, the filter cover is fixed to the housing with the protrusions in contact with the air filter and portions of the pillars other than the protrusions separated from the air filter, the number of the protrusions is less than the number of the housing-side protrusions; Blower.

2. The maximum thickness of the air filter when the filter cover is in contact with the air filter is smaller than the maximum thickness when the filter cover is not in contact with the air filter. The blower device according to claim 1 .

3. The pillar includes a plurality of the protrusions, the plurality of protrusions are disposed at equal intervals between both ends of the air intake port in a first direction when the air intake port is viewed from the front, The blower device according to claim 1 or 2.

4. the filter cover includes a frame body surrounding the plurality of columns, The frame abuts against a peripheral portion of the air filter to hold the air filter in the housing. The blower device according to claim 1 or 2.

5. The protrusion of the filter cover and the protrusion on the housing side are arranged in a position where they overlap when viewed from the front of the air intake port. The blower device according to claim 1 or 2.

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