Ceiling mounted ventilation fan

Abstract

To enhance airtightness without impairing workability in a ventilating device in which an adapter and a box body are independently constituted.SOLUTION: A ceiling embedded type ventilating fan comprises: a case comprising a suction port in a bottom surface, and a discharge port in a side surface; an adapter plate connected to the side surface, and comprising a rectangular opening; a duct connection adapter protruding in an outer peripheral direction of the case from the adapter plate; and an air blowing part for guiding air to the discharge port from the suction port. The duct connection adapter is constituted separately from the adapter plate, and comprises a sealing part along an edge part of the rectangular opening and in contact with the edge part from the inside of the case, and a locking part in contact with the edge part from the outside of the case. The edge part is detachably held by the sealing part and the locking part.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a ceiling embedded type ventilation fan that is installed on the ceiling of a building or the like. [Background technology]

[0002] There are two ways to install a ceiling recessed ventilation fan, where the weight of the fan is supported by a sturdy cross beam called a joist: either the ceiling board is attached after the fan is installed, or an appropriate opening is made in the existing ceiling board and the fan is installed. In either case, the mounting bracket that makes up the ceiling recessed ventilation fan is first installed (screwed) on the joist, then an adapter is installed on the mounting bracket, and the main frame of the ceiling recessed ventilation fan is fitted into the adapter to form a single unit, and the main frame is then screwed into the adapter. In this case, the main frame is slid into the adapter to fit it in.

[0003] However, some construction companies and buildings in some regions require ceiling-mounted ventilation fans to be non-flammable. In such buildings, all parts exposed to the outside, except for the duct connection adapter, must be made of metal, except for very small parts. In such cases, the duct connection adapter is generally connected to the adapter plate from the outside by screws, spot welding, or crimping.

[0004] A known conventional ceiling recessed ventilation fan has a structure in which an adapter is fixed to a main body frame with screws (see, for example, Patent Document 1).

[0005] A conventional ceiling embedded type ventilation fan will be described with reference to FIG.

[0006] A conventional ceiling-embedded ventilation fan is installed in the ceiling of a building, and an adapter set 104, which comprises a metal or resin adapter plate 102 and an adapter 103 attached integrally to a main body frame 101 having an air outlet on one side, is fixed to the main body frame 101 from the outer side with screws.

[0007] Also, a different conventional ceiling recessed ventilation fan is known that has a structure in which an adapter is fixed to an adapter plate with screws (see, for example, Patent Document 2).

[0008] A conventional ceiling embedded type ventilation fan will be described with reference to FIG.

[0009] A conventional ceiling-embedded ventilation fan is installed in the ceiling of a building, etc., and a metal or resin adapter 202 is fixed to an adapter plate 203 with screws, and the adapter plate 203 is then attached to a box (not shown) that has an air outlet on one side. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Utility Model Application Publication No. 3-97141 [Patent Document 2] International Publication No. 2018 / 220697 Summary of the Invention [Problem to be solved by the invention]

[0011] However, in conventional ceiling-embedded ventilation fans, the adapter plate 102 and the adapter 103 are simply fixed with screws at a few points from the outside of the enclosure, and a gap occurs between the adapter plate 102 and the adapter 103. This causes air to leak into the attic through the gap, particularly in upper floors of buildings where exhaust resistance is likely to be high, or in properties with complex bends in the exhaust duct, and an improvement was desired.

[0012] As a configuration that does not create a gap between the adapter and the adapter plate and is less likely to cause air leakage, the technology shown in Figure 17 can be applied, in which the adapter is fixed to the adapter plate with screws to prevent air leakage.

[0013] However, when these structures are adopted, the installation method is limited. In other words, in the installation method in which the weight of the ceiling recessed type ventilation fan is supported by a sturdy cross beam called a joist, as described above, the installation bracket and the adapter part are installed first, and then the main body frame is fitted into the adapter part later to integrate them, and the main body frame is fixed to the adapter with screws. Here, in the conventional ceiling recessed type ventilation fan, the adapter is fixed with screws from the outer side of the adapter plate, so the screw threads penetrate and protrude from the inner surface of the adapter plate. Therefore, when fitting the main body frame to the adapter part later, the screw threads get in the way, making it difficult to slide the main body frame into the adapter. In addition, when the adapter is directly fixed to the adapter plate with screws, it is inconvenient that the adapter protrudes toward the main body frame from the adapter plate, and the protruding adapter gets in the way, making it difficult to slide the main body frame into the adapter.

[0014] Therefore, conventional ceiling-mounted ventilation fans had issues such as gaps occurring between the adapter and the adapter plate, resulting in air leaks, and difficulty in sliding the main frame onto the adapter plate when fitting the main frame of the ceiling-mounted ventilation fan into the adapter plate to integrate it.

[0015] Therefore, an object of the present invention is to provide a ceiling recessed type ventilation fan in which the adapter and main body frame are configured independently, which prevents air leakage without sacrificing ease of installation. [Means for solving the problem]

[0016] A ceiling embedded type ventilation fan according to one aspect of the present invention includes a housing having an intake port on a bottom surface and an exhaust port on one side surface, an adapter plate connected to the one side surface and having a rectangular opening, and a fan assembly provided between the adapter plate and the housing. Downstream of air flow and a blower section that guides air from the suction port to the blower port, the duct connection adapter being formed separately from the adapter plate and extending along an edge of the rectangular opening. The upstream side of the adapter platea sealing portion abutting the edge portion from the sealing portion; Downstream side of the adapter plate and a locking portion that abuts against the edge portion from the sealing portion, wherein the edge portion is detachably gripped by the sealing portion and the locking portion. Effect of the Invention

[0017] According to the present invention, it is possible to provide a ceiling recessed ventilation fan in which the adapter and the main body frame are configured independently, which prevents air leakage without sacrificing ease of installation. [Brief description of the drawings]

[0018] [Figure 1] 1 is a perspective view of a ceiling embedded type ventilation fan according to the present invention. [Diagram 2] Underside view of a ceiling mounted ventilation fan. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 13 is a perspective view of the adapter set with the duct connection adapter removed. [Figure 7] FIG. 4 is a side perspective view of the outer circumferential surface of the duct connection adapter. [Figure 8] FIG. 8 is a side perspective view of one side opposite to FIG. 7. [Figure 9] Cross-sectional view of the duct connection adapter. [Figure 10] 6 is a diagram showing the behavior of the shutter when the blower unit is operating. [Figure 11] 11 is a perspective view showing the insertion direction when attaching the duct connection adapter to the adapter plate. FIG. [Figure 12] 11 is a perspective view showing a procedure for engaging the engaging portion with the edge portion. FIG. [Figure 13] 11A to 11C are perspective views showing a procedure for locking the opposite side locking portion to an edge portion. [Figure 14] 5A and 5B are a perspective view and a cross-sectional view showing the positional relationship between an edge portion and a sealing portion when the adapter set is assembled. [Figure 15]1 is a perspective view showing an example of a procedure for installing a ceiling recessed ventilation fan on a ceiling. [Figure 16] A detailed diagram showing the structure of a conventional ceiling-mounted ventilation fan. [Figure 17] FIG. 2 is a detailed diagram showing the structure of another conventional ceiling-embedded ventilation fan. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings to facilitate understanding of the present invention. Note that the following embodiment is an example of the present invention and does not limit the technical scope of the present invention. In addition, the same reference numerals are used to designate the same parts throughout the drawings, and the description thereof will be omitted or simplified from the second time onwards.

[0020] (Embodiment 1) First, the configuration of a ceiling embedded type ventilation fan 30 according to the present embodiment will be described with reference to Figures 1, 2, 3, 4, and 5. Note that Figure 1 is an exploded perspective view of ceiling embedded type ventilation fan 30 according to the present embodiment, Figure 2 is a bottom view of ceiling embedded type ventilation fan 30, Figure 3 is a side perspective view of adapter set 3, Figure 4 is a perspective view of blower unit 2, and Figure 5 is an exploded perspective view of housing 1 and blower unit 2.

[0021] The ceiling embedded type ventilation fan 30 according to the present invention includes a housing 1 , a blower unit 2 , and an adapter set 3 .

[0022] The housing 1 has a box shape with at least one side open, and is made of metal. The housing 1 includes an air inlet 4, an air outlet 5, and a guide member 12.

[0023] When the ceiling recessed type ventilation fan 30 is installed on the ceiling with its bottom surface flush with the surface of the ceiling board, the intake port 4 faces downward from the ceiling toward the ground, that is, vertically. This surface corresponds to the opening of the housing 1. Air is drawn into the housing 1 via a design panel (not shown).

[0024] The air outlet 5 is provided as an opening on one of the side surfaces adjacent to the bottom surface on which the air inlet 4 is provided. The air outlet 5 is provided as an opening on the entire side surface of the housing 1, but the air actually flows only through a portion corresponding to the air outlet 5b, which is an opening provided in the blower unit 2.

[0025] The air inlet 4 and the air outlet 5 are communicated with each other inside the housing 1, and this communicated air passage constitutes an exhaust air passage 6.

[0026] The housing 1 includes a guide member 12 near the air outlet 5 on the adjacent side surface 1a.

[0027] The guide member 12 is an elastic protrusion located on the outer periphery of the housing 1 and is made of resin.

[0028] The bulging portion 22 is shaped so that the center of the long side of the rectangular shape bulges outward from the adjacent side surface 1a in an arched shape, and engages with the recessed shape 17 of the adapter plate 13. In other words, due to the sliding structure between the guide receiving portion 13a and the guide member 12 described below, the housing 1 guides the adapter set 3 in the up and down direction, while at the same time suppressing the movement of the air outlet 5 in the near and far directions. In this embodiment, the guide receiving portions 13a are provided on both side surfaces.

[0029] The guide receiving portion 13a is formed, for example, by bending the side surface of the adapter plate 13 twice at one location. The guide receiving portion 13a extends from a side edge, which is the end of the flat surface of the adapter plate 13, in the direction of the adjacent side surface 1a in parallel to the adjacent side surface 1a, and further extends from the extended tip toward the adjacent side surface 1a. In other words, the guide receiving portion 13a has a concave shape 17 when viewed from above the adapter set 3 (as viewed from above in FIG. 1). The guide receiving portion 13a guides the housing 1 to the adapter set 3 by bringing the guide member 12 provided on the adjacent side surface 1a into contact with the inner peripheral wall of the recess in the concave shape 17 and guiding it in the up-down direction.

[0030] Blower unit 2 is disposed in exhaust air duct 6, and guides air from inlet 4 to outlet 5. Blower unit 2 includes a fan case 7, a motor 8, a fan 9, and a motor support 11.

[0031] Fan case 7 forms the outer shell of blower section 2 and is made of resin. Fan case 7 has a roughly cylindrical shape and is provided with an opening on the bottom located on the lower surface for drawing in air and an opening on the side for discharging air. Fan case 7 is divided into scroll section 7a and blow-out opening plate 31.

[0032] The scroll section 7a is a part of the fan case 7, with an opening at the bottom adjacent to the inlet 4 and an outlet 5b on the side facing the same plane as the outlet 5 of the housing 1. The scroll section 7a is substantially cylindrical and has a circular scroll shape in cross section. The scroll section 7a contains a fan 9. The scroll section 7a has an orifice section 15 at the opening at the bottom, and an outlet opening plate 31 is arranged on the side having the outlet 5b.

[0033] The air outlet plate 31 is a rectangular plate having an opening as the air outlet 5b, and is provided at a position to partially block the air outlet 5 of the housing 1. The air outlet plate 31 includes a packing 43 around the downstream side of the air outlet 5b.

[0034] The motor 8 is, for example, a DC motor with a rotating shaft that protrudes toward the suction port 4. The motor 8 is disposed on the top surface 1b side in the internal space of the fan case 7, and is attached near the center of the motor support 11 with a fixing means such as a screw. The motor 8 rotates the rotating shaft when power is supplied. Power is supplied to the motor 8 via an electrical board (not shown).

[0035] The fan 9 is, for example, a sirocco fan fixed to a rotating shaft. When the motor 8 is started, the rotating shaft rotates, and the fan 9 starts to move the air. That is, the air blowing unit 2 operates to guide the air from the intake port 4 to the exhaust port 5.

[0036] The electrical board case 10 is made of an electrical board base 10a made of flame-retardant resin and an electrical board cover 10b also made of flame-retardant resin. The electrical board is attached to the electrical board base 10a with fastening means such as screws. The electrical board cover 10b is also attached to the electrical board base 10a with fastening means such as screws.

[0037] The electrical board is housed in an electrical board case 10 and is attached to the side of the fan case 7 close to the outer periphery by a fixing means such as a screw (not shown).

[0038] Motor support 11 forms the outer shell of blower unit 2 and is made of metal or resin. Motor support 11 is disposed on the top surface 1b side in the internal space of fan case 7 and is attached to fan case 7 with fixing means such as screws.

[0039] Orifice portion 15 is formed at intake port 4 of fan case 7, has a cylindrical shape, and is open in the center. Orifice portion 15 is located upstream of blower portion 2 when viewed from the air flow direction. Orifice portion 15 may be a separate part from fan case 7. If it is a separate part, the orifice portion is made of resin. If it is a separate part, orifice portion 15 is attached to the opening of fan case 7 and the bottom surface of the part opening with fixing means such as screws.

[0040] The fan case 7 is attached to the housing 1 below the center in the height direction of the housing 1 by a fixing means such as a screw. In this embodiment, it is attached to the housing 1 via a connecting member (not shown). Note that a configuration in which a motor support 11 is attached to the housing 1 instead of the fan case 7 may also be used.

[0041] The packing 43 is a low-density sealing material that is attached in a rectangular shape to the periphery of the downstream side of the air outlet 5b, and has elasticity. The material is foamed rubber. The packing 43 is divided into strips and attached to the periphery of the downstream side of the air outlet 5b without any gaps, but a configuration in which the packing 43 has a hollow rectangular shape and is attached to the periphery of the downstream side of the air outlet 5b may also be used.

[0042] The adapter set 3 is provided on one side of the housing 1, downstream of the air outlet 5. The adapter set 3 includes a power connection portion 16, an adapter plate 13, and an adapter 14 for duct connection.

[0043] The power supply connection part 16 stands facing downstream from the adapter plate 13, and is composed of a power supply connection part base 16a and a power supply connection part cover 16b. When the ceiling recessed type ventilation fan 30 is installed, the power supply connection of the ceiling recessed type ventilation fan 30 can be made by connecting the power supply wiring on the indoor side inside the power supply connection part 16.

[0044] The power connection base 16a is a rectangular housing having at least one opening on one side, and is made of metal.

[0045] The power connection cover 16b is a rectangular housing having at least one opening on one side, and is made of metal.

[0046] In this embodiment, the adapter plate 13 and the power connection part base 16a are fixed by crimping, and the power connection part base 16a and the power connection part cover 16b are attached using fixing means such as screws. The adapter plate 13 and the power connection part base 16a may be fixed by crimping, spot welding, etc., but in either case, it is preferable that there are no convex processing marks or convex shapes such as screw threads on the back surface of the adapter plate 13, that is, on the air outlet 5 side, which is the inside direction of the housing 1 with the adapter plate 13 as the reference.

[0047] The adapter plate 13 and the duct connection adapter 14 will be described in detail later.

[0048] Next, the adapter plate 13 and the duct connection adapter 14 constituting the adapter set 3 will be described in detail with reference to Figures 6, 7, 8, 9, and 10. Note that Figure 6 is a perspective view of the adapter set 3 with the duct connection adapter 14 removed, Figure 7 is a side perspective view of the outer circumferential surface of the duct connection adapter 14, Figure 8 is a side perspective view of one side opposite to Figure 7, Figure 9 is a cross-sectional view of the duct connection adapter 14, and Figure 10 is a diagram showing the behavior of the shutter 18 when the blower unit 2 is operating.

[0049] The adapter plate 13 is a flat plate of approximately the same size as one side surface of the housing 1, and is made of metal. The adapter plate 13 is provided on the downstream side of the side surface of the housing 1 on which the air outlet 5 is provided. The adapter plate 13 has a rectangular opening 51, an engagement portion 52, and an edge portion 53.

[0050] The rectangular opening 51 is an opening having a rectangular shape that is opened in the adapter plate 13. The rectangular opening 51 is located downstream of the air outlet 5b so as to correspond to the air outlet 5b.

[0051] The engagement portion 52 is a notch formed on one side surface of the rectangular opening 51 and extending from the rectangular opening 51 toward the outer periphery.

[0052] The edge portion 53 is located around the rectangular opening 51, in other words, the rectangular opening 51 is formed by the edge portion 53. The edge portion 53 bulges slightly toward the downstream side of the air outlet 5 with respect to a reference plane 40 that serves as a reference for the adapter plate 13. Here, the reference plane 40 is a plane to which most of the adapter plate 13 belongs.

[0053] The duct connection adapter 14 stands from the adapter plate 13 toward the downstream side, and has a hollow shape with a rectangular shape on the upstream side and a circular shape on the downstream side. The material of the duct connection adapter 14 is resin, particularly polypropylene resin, which is elastic and highly abrasion resistant. The duct connection adapter 14 connects the internal space with the air outlet 5, and guides the exhaust air blown out from inside the housing 1. The duct connection adapter 14 can be connected to, for example, the indoor end of a duct that communicates between the inside and the outside, allowing the exhaust air from the ceiling embedded ventilation fan 30 to be discharged outdoors.

[0054] The duct connection adaptor 14 further includes a sealing portion 54 , a locking portion 41 , a shaft portion 57 , an engaged portion 58 , and a shutter 18 .

[0055] The sealing portion 54 is integral with the duct connection adapter 14 and is provided as a flange extending from the outer wall surface toward the outer periphery at the upstream end of the duct connection adapter 14. The sealing portion 54 has approximately the same shape as the edge portion 53, and its downstream surface faces the edge portion 53 and fits into the bulge of the edge portion 53 to come into close contact with the adapter plate 13.

[0056] The one-side locking portion 55 constituting the locking portion 41 is integral with the duct connection adapter 14, protrudes further outward from the outer circumferential surface of the duct connection adapter 14, and has a claw shape. Two one-side locking portions 55 are provided, one near each end of a predetermined side of the duct connection adapter 14. The one-side locking portion 55 has a gap between its side surface in the protruding direction and the downstream flat surface of the sealing portion 54 that is slightly wider or equal to the thickness of the edge portion 53. This gap, i.e., the one-side locking portion 55 and the sealing portion 54, clamps and holds the edge portion 53.

[0057] The opposite side locking portion 56 constituting the locking portion 41 is integral with the duct connection adapter 14, protrudes further outward from the outer circumferential surface of the duct connection adapter 14, and has a claw shape. Two opposite side locking portions 56 are provided, one near each end of the opposite side that faces the side on which the locking portion 55 is provided. The opposite side locking portion 56 has a gap between its side in the protruding direction and the downstream flat surface of the sealing portion 54 that is slightly wider or equal to the thickness of the edge portion 53. This gap, i.e., the opposite side locking portion 56 and the sealing portion 54, sandwiches and grips the edge portion 53.

[0058] The duct connection adapter 14 is detachably fixed to the edge 53 of the adapter plate 13 by the sealing portion 54 and the locking portion 41 , that is, by the sealing portion 54 and the one side locking portion 55 and the sealing portion 54 and the opposite side locking portion 56 .

[0059] In this embodiment, when the one-side locking portion 55 and the opposite-side locking portion 56 are compared in FIG. 9, the one-side locking portion 55 has a larger claw shape in cross section, that is, the one-side locking portion height 45 is higher than the opposite-side locking portion height 46. In other words, the opposite-side locking portion height 46 of the opposite-side locking portion 56 is lower than the one-side locking portion height 45. In this embodiment, the one-side locking portion height 45 is 5 mm, and the opposite-side locking portion height 46 is 3 mm. Also, in cross section, the one-side locking portion 55 has a shallower claw engagement, that is, the one-side locking portion depth 47 is shallower. And the opposite-side locking portion 56 has a deeper opposite-side locking portion depth 48 than the one-side locking portion depth 47. In this embodiment, the one-side locking portion depth 47 is 1.5 mm, and the opposite-side locking portion depth 48 is 1.8 mm. This is to facilitate the operation of engaging the duct connection adapter 14 with the adapter plate 13. Details will be described later.

[0060] The shafts 57 are protrusions for mounting the shutter 18, and are formed integrally with the duct connection adapter 14. The shafts 57 are coaxially opposed protrusions that protrude from the inner wall of the duct connection adapter 14 toward the internal space. The shafts 57 form an acute angle with respect to one side that forms the rectangular opening 51, in other words, they are not perpendicular or parallel to all four sides that form the rectangular opening 51. The shafts 57 have a coaxial connection that connects the opposed protrusions and functions as the rotation axis of the shutter 18.

[0061] The engaged portion 58 is formed integrally with the duct connection adapter 14 and is a protrusion that protrudes further outward from the outer circumferential surface of the duct connection adapter 14. The engaged portion 58 fits into and engages with the engaging portion 52, which is a notch, when the duct connection adapter 14 is attached to the adapter plate 13. The engaged portion 58 is provided between the two one-side locking portions 55.

[0062] The shutter 18 is located in the internal space of the duct connection adaptor 14, and opens and closes the internal space of the duct connection adaptor 14, i.e., the air passage. The shutter 18 is plate-shaped and made of resin. When the blower 2 is not in operation, the shutter 18 blocks the cylindrical opening in the internal space of the duct connection adaptor 14. This blocking is performed by the shutter 18's own weight and / or wind pressure due to backwind from the downstream side. When the blower 2 is in operation, the shutter 18 performs an opening operation so as not to provide resistance to the exhaust air blown out from the blower 2, i.e., the inside of the housing 1. This opening operation is performed by wind pressure due to the exhaust air. In order for the shutter 18 to perform this function when the blower 2 is in operation and when it is not in operation, it is preferable that the shutter 18 is attached to the shaft portion 57 at a position as far away as possible from the center of gravity of the shutter 18.

[0063] Next, the procedure for gripping the duct connection adapter 14 on the adapter plate 13 will be described with reference to Figures 11, 12, 13, and 14. Figure 11 is a perspective view showing the insertion direction when attaching the duct connection adapter 14 to the adapter plate 13, Figure 12 is a perspective view showing the procedure for engaging the one-side locking portion 55 with the edge portion 53, Figure 13 is a perspective view showing the procedure for engaging the opposite-side locking portion 56 with the edge portion 53, and Figure 14 is a perspective view and a cross-sectional view showing the positional relationship between the edge portion 53 and the sealing portion 54 when the adapter set 3 is assembled.

[0064] As shown in Fig. 12, the duct connection adapter 14 is first inserted into the rectangular opening 51 of the adapter plate 13 from an oblique direction on the upstream side. At this time, positioning is performed by first engaging the protrusion of the engaged portion 58 with the notch of the engaging portion 52. The duct connection adapter 14 shown in this embodiment has a directional attachment because the shaft portion 57 is not perpendicular or parallel to all four sides that form the rectangular opening 51. Even if the attachment of the duct connection adapter 14 and the adapter plate 13 has a directional attachment, since there is only one each of the engaging portion 52 and the engaged portion 58, it is possible to prevent erroneous assembly such as attaching it upside down.

[0065] After the positioning is complete, as shown in Figure 13, the surface of the sealing portion 54 is moved so as to be parallel to the reference plane 40 of the adapter plate 13, whereby the one-side locking portion 55 moves downstream of the edge portion 53, and as a result, the edge portion 53 is gripped between the one-side locking portion 55 and the sealing portion 54.

[0066] 13, when the opposite side locking portion 56 is pressed in the insertion direction shown in the figure with the edge portion 53 being gripped by the one side locking portion 55 and the sealing portion 54, the claw shape of the opposite side locking portion 56 climbs over the edge portion 53 and moves downstream of the edge portion 53, gripping the edge portion 53 between the sealing portion 54. Compared to the one side locking portion 55, the opposite side locking portion 56 has a lower opposite side locking portion height 46 and is made of an elastic resin, so that the opposite side locking portion 56 detachably engages with the edge portion 53 without causing harmful deformation during assembly.

[0067] 14, the thickness of the sealing portion 54 is slightly smaller than the height 42 of the step shape bulging out on the downstream side of the edge portion 53. In this embodiment, the thickness of the sealing portion 54 is 1.5 mm, while the height 42 is 1.8 mm. Therefore, when the duct connection adapter 14 and the adapter plate 13 are engaged, the sealing portion 54 does not protrude upwind from the reference plane 40.

[0068] Next, an example of a procedure for forming an appropriate opening in an existing ceiling board and attaching a ceiling recessed type ventilation fan will be described with reference to Fig. 15. Fig. 15 is a perspective view showing an example of a procedure for installing a ceiling recessed type ventilation fan on a ceiling.

[0069] The ceiling recessed ventilation fan 30 is attached using mounting fixtures 32 when an appropriate opening is made in an existing ceiling panel and the fan is installed.

[0070] The mounting brackets 32 are members that can adjust the gap between the joists steplessly, for example within a range of 11 inches to 25 inches, and are made of metal. The mounting brackets 32 are fixed to the left and right joists with screws or the like, and then the adapter set 3 is fixed to the mounting brackets 32 with screws or the like. Next, the housing 1 is attached from below with screws or the like to the adapter set 3 installed in the ceiling opening.

[0071] When the housing 1 is attached to the adapter set 3, the guide member 12 provided on the side of the housing 1 engages with the guide receiving portion 13a of the adapter set 3 and is slid upward. The duct connection adapter 14 and the shutter 18 are located on the outer periphery side of the adapter set 3 with respect to a reference plane 40 facing the air outlet 5. At this time, there is no shape that bulges toward the housing 1 with respect to the reference plane 40, including fastening members such as screws. As described above, the air outlet 5b is provided with the packing 43, and by pressing the packing 43 against the upstream surface of the sealing portion 54, a ceiling recessed type ventilation fan 30 with no gap between the housing 1 and the adapter set 3 can be provided.

[0072] With the above configuration, it is possible to obtain a ceiling-recessed ventilation fan that solves problems such as gaps occurring between the adapter and the adapter plate, resulting in air leakage, and the difficulty of sliding the main body frame onto the adapter plate when fitting the main body frame of the ceiling-recessed ventilation fan into the adapter plate to integrate it. [Industrial Applicability]

[0073] The ceiling-mounted ventilation fan of the present invention is useful as a ceiling-mounted ventilation fan in which the adapter and housing are configured independently, and which can prevent air leakage into the attic without sacrificing ease of installation. [Explanation of symbols]

[0074] 1 Case 1a Adjacent side 1b Top 3 Adapter Set 4 Intake port 5, 5b Air outlet 6 Exhaust duct 7 Fan case 7a Scroll section 8 Motor 9 Fan 10 Electrical board case 10a Electrical board base 10b Electrical board cover 11 Motor Support 12 Guide member 13 Adapter plate 13a Guide receiving part 14 Duct connection adapter 15 Orifice section 16 Power Connection 16a Power Connection Base 16b Power connection cover 17 Concave shape 18 Shutter 30 Ceiling-mounted ventilation fan 31 Air outlet plate 32 Installation fittings 40 Reference plane 41 Locking part 42 Height 43 Gasket 45 Height of one side locking part 46 Height of opposite side locking part 47 Depth of one side locking part 48 Opposite side locking depth 51 Rectangular opening 52 Engagement part 53 Edge 54 Sealing part 55 Locking part 56 Opposite side locking part 57 Shaft 58 Engaged part

Claims

1. A housing having an intake port on a bottom surface and an exhaust port on one side surface; A blower that guides air from the air inlet to the air outlet; an adapter plate connected to the one side and having a rectangular opening; a duct connection adapter protruding from the adapter plate in a downstream direction in the air flow direction, The duct connection adapter is The adapter plate is configured separately from the adapter plate. a sealing portion that contacts the edge of the rectangular opening from the upstream side of the adapter plate along the edge of the rectangular opening; a locking portion that abuts against the edge portion from the downstream side of the adapter plate, The edge portion is removably gripped by the sealing portion and the locking portion.

2. The locking portion is provided corresponding to two opposing edge portions of the rectangular opening, The locking portion and the sealing portion are The ceiling recessed ventilation fan according to claim 1 , wherein the edge portions of the two opposing sides are gripped.

3. The locking portion is a one-side engaging portion provided corresponding to one side of the rectangular opening; An opposite side engaging portion provided on another side opposite to the one side; Equipped with The ceiling recessed ventilation fan according to claim 1 , wherein a height of the one-side engaging portion from the sealing portion is greater than a height of the opposite-side engaging portion from the sealing portion.

4. The adapter plate comprises: an engagement portion that is a notch provided on one side of an edge portion of the rectangular opening; The duct connection adapter is The duct connection adapter has an outer circumferential surface provided with an engaged portion which is a protrusion for engaging with the engaging portion, 3. The ceiling recessed ventilation fan according to claim 2, wherein a connection direction between the duct connection adaptor and the adaptor plate is determined to be only one direction in which the engaging portion and the engaged portion can engage with each other.

5. The engaged portion is The ceiling recessed ventilation fan according to claim 4, wherein the engaging portion is provided on the same side.

6. The locking portion is 2. The ceiling recessed ventilation fan according to claim 1, which is made of an elastic material.

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