Air supply device

Abstract

To provide an air supply device with a structure in which a user can easily clean the inside of a housing and a rotary vane.SOLUTION: An air supply device is provided in an underfloor space of a house, the air supply device comprising an air blower with a rotary vane detachably connected to a rotary drive shaft, and a housing for housing the air blower. The housing comprises a housing body with an opening for inserting and removing the rotary vane, and a lid part that can be mounted on the housing body so as to partially cover the opening of the housing body, and which can be detached from the housing body. The lid part having a rotation center positioned on an extended line of the rotary drive shaft. The lid part and the housing body are configured such that the lid part can be detached from the housing body by rotating the lid part around the rotation center in a state that the lid part has partially covered the opening.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] Conventionally, there has been proposed an air conditioning system that takes in conditioned air from an air conditioner into an underfloor space of a building such as a house, and conditions the above-floor space of a room such as a living room (see, for example, Patent Document 1). Patent Document 1 discloses an air supply device that takes in conditioned air supplied to the underfloor space and supplies the taken in conditioned air to the above-floor space (indoor space) of the room. This air supply device is disposed in the underfloor space. This air supply device includes a blower having a rotating blade, and a housing that contains the blower. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-78909 Summary of the Invention [Problem to be solved by the invention]

[0004] However, dust may be floating in the underfloor space. In this case, dust may adhere to the inside of the housing and the rotor. If the amount of dust adhering to the inside of the housing and the rotor increases, the airflow may decrease and the air supply performance may deteriorate. In addition, it is preferable that the air supply device be cleaned so that clean air can be supplied. For this reason, users are demanding an air supply device with a structure that allows the inside of the housing and the rotor to be easily cleaned. However, the air supply device described in Patent Document 1 does not have a structure that allows the user to easily clean the inside of the housing and the rotor.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In view of the above problems, an object of the present invention is to provide an air intake device having a structure that allows a user to easily clean the inside of the housing and the rotor. [Means for solving the problem]

[0006] The air supply device of the present invention is an air supply device installed in the space under the floor of a house, and comprises a blower having a rotor connected removably to a rotating drive shaft, and a housing that accommodates the blower, and the housing comprises a housing main body having an opening through which the rotor can be inserted and removed, and a lid portion that can be attached to the housing main body so as to partially cover the opening of the housing main body and is detachable from the housing main body, the lid portion has a center of rotation located on an extension of the rotating drive shaft, and the lid portion and the housing main body are configured such that the lid portion can be attached and detached to the housing main body by rotating the lid portion around the center of rotation with the lid portion partially covering the opening. Effect of the Invention

[0007] According to the present invention, it is possible to provide an air intake device having a structure that allows a user to easily clean the inside of the housing and the rotor. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an example of an air supply device according to an embodiment of the present invention; [Diagram 2] 2 is a cross-sectional view of the air supply device shown in FIG. 1 taken along the vertical direction. [Diagram 3] FIG. 2 is an exploded perspective view of the air supply device shown in FIG. [Figure 4] 4 is a front view of the lid portion shown in FIG. 3 as viewed from the front side. [Diagram 5] 4 is a rear view of the lid portion shown in FIG. 3 as seen from the rear side. [Figure 6] 5 is a cross-sectional view of the lid portion shown in FIG. 4 cut along a radial direction. [Figure 7] 4 is a diagram illustrating attachment and detachment of a lid to and from the housing shown in FIG. 3. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an air intake device according to an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is merely an example, and the air intake device according to the present invention is not limited to the embodiment described below.

[0010] The air supply device 1 according to this embodiment shown in Figs. 1 to 3 is an air supply device provided in an underfloor space S1 of a house. In this embodiment, the air supply device 1 is used as one of the components of an underfloor air conditioning system of a central air conditioning type. The underfloor air conditioning system of a central air conditioning type is, for example, a system that takes in conditioned air (warm air or cold air) from an air conditioner (air conditioner, not shown) into an underfloor space S1 (see Fig. 2) on the first floor of a house, and conditions an above-floor space S2 (see Fig. 2) such as rooms on the first and second floors. The underfloor air conditioning system includes an air conditioner (not shown), an underfloor space S1, an above-floor space S2, and an air supply device 1. The underfloor space S1 and the above-floor space S2 are in communication with each other via an opening OP formed in a floor part FL (see Fig. 2). The air supply device 1 is a device that supplies conditioned air from the underfloor space S1 to the above-floor space S2 in the underfloor air conditioning system. The air supply device 1 is configured to suck in conditioned air within the underfloor space S1 and supply the sucked conditioned air to the above-floor space S2 through an opening OP.

[0011] In this specification, the vertical direction of a house is referred to as the "vertical direction" (the direction indicated by reference symbol X in FIG. 1). In addition, in the air supply device 1, the direction along the vertical direction X of the room, etc. when the air supply device 1 is placed indoors, etc. is referred to as the "vertical direction" of the air supply device 1 (the direction indicated by reference symbol X in FIG. 1) (the same applies when the air supply device 1 is not placed indoors, etc.). In addition, the direction along the rotary drive shaft 21 of the blower 2 in the air supply device 1 is referred to as the "front-rear direction" (the direction indicated by reference symbol Y in FIG. 2). In addition, in the air supply device 1, the direction perpendicular to the "vertical direction" and the "front-rear direction" of the air supply device 1 is referred to as the "width direction" of the air supply device 1 (the direction indicated by reference symbol Z in FIG. 2). The vertical direction X, the front-rear direction Y, and the width direction Z are perpendicular to each other. In the example shown in FIG. 1, the diagonally lower left side in FIG. 1 is the front side of the "front-rear direction", and the diagonally upper right side in FIG. 1 is the rear side of the "front-rear direction".

[0012] As shown in FIGS. 1 to 3, the air supply device 1 includes a blower 2 having a rotor 22 detachably connected to a rotary drive shaft 21, and a housing 3 for accommodating the blower 2 therein.

[0013] In this embodiment, the air supply device 1 is a device that supplies conditioned air from the underfloor space S1 (see FIG. 2) to the above-floor space S2 in the underfloor air conditioning system. The air supply device 1 is disposed in the underfloor space S1. Specifically, the housing 3 of the air supply device 1 has an air intake port (intake port) 33 that draws in the conditioned air from the underfloor space S1. The housing 3 also has an air supply port (outlet port) 34 that is connected to an opening OP provided in the floor FL. In the example shown in FIG. 1, the air supply device 1 has an intake side opening 341 that constitutes the air supply port 34, and a lattice-shaped air supply grill 342 that is detachably attached to the intake side opening 341. Note that the air supply grill 342 is not shown in FIGS. 2 and 3.

[0014] The blower 2 is a device that transfers air by the rotational motion of a rotor (impeller) 22. The blower 2 has a function of sucking in conditioned air supplied to the underfloor space S1 (see FIG. 2) by an air conditioner and supplying the sucked conditioned air to the above-floor space S2. In this embodiment, the blower 2 includes a motor 23 having a rotary drive shaft 21 (see FIG. 2 and FIG. 3) and a rotor 22 detachably connected to the rotary drive shaft 21. The motor 23 is, for example, an electric motor. The type and performance of the blower 2 are not particularly limited as long as it can suck in the conditioned air supplied to the underfloor space S1 and supply the sucked conditioned air to the above-floor space S2. In this embodiment, the blower 2 is a sirocco fan. In this case, the blower 2 includes a rotor 22 having a plurality of blades 221 arranged in a cylindrical shape.

[0015] The blower 2 is configured to take in conditioned air from the front side of the rotor 22 in the central axis direction (front-rear direction Y) by rotating the rotor 22 due to the rotation drive of the motor 23, and to blow out the conditioned air radially outward from the rotor 22. Therefore, in this embodiment, an air intake port 33 is provided in front of the rotor 22 in the front-rear direction Y. In addition, a guide portion 35 described below is provided along the outer periphery of the rotor 22. The guide portion 35 is configured to guide the conditioned air blown downward and sideways from the outer periphery of the rotor 22 to above the rotor 22. In addition, an air supply port 34 is provided above the rotor 22.

[0016] The configuration for detachably connecting the rotor blades 22 to the rotary drive shaft 21 is not particularly limited. In this embodiment, the rotary drive shaft 21 is configured to be insertable and detachable into the shaft insertion hole 222 provided at the rotation center of the rotor blades 22. The blower 2 includes a fixing member 24 that fixes the rotor blades 22 to the rotary drive shaft 21 in a state in which the rotary drive shaft 21 is inserted into the shaft insertion hole 222 (see FIG. 3) of the rotor blades 22. The fixing member 24 includes, for example, a female screw (not shown) that screws into a male screw (not shown) provided at the tip of the rotary drive shaft 21. The fixing member 24 can be attached and detached to the rotary drive shaft 21 by rotating the fixing member 24 around the axis. The rotor blades 22 can be attached and detached to the rotary drive shaft 21 by attaching and detaching the fixing member 24 to and from the rotary drive shaft 21.

[0017] The female thread formed in the fixing member 24 and the male thread provided at the tip of the rotary drive shaft 21 are oriented in such a way that they do not loosen due to the rotation of the rotor 22. Specifically, the male thread and the female thread are oriented in such a way that the loosening direction is opposite to the rotation direction of the rotor 22.

[0018] In this embodiment, the rotor 22 is configured not to rotate in the axial direction relative to the rotary drive shaft 21. For example, the cross section of the portion of the rotary drive shaft 21 where the rotor 22 is attached is formed in a D shape. The shaft insertion hole 222 of the rotor 22 is formed in a D shape to match the cross-sectional shape of the rotary drive shaft 21. This makes it possible to prevent the rotor 22 from rotating in the axial direction relative to the rotary drive shaft 21.

[0019] The housing 3 includes a housing body 31 and a lid portion 32. The housing 3 is configured to be able to accommodate the blower 2. In this embodiment, the housing body 31 includes an air intake port 33 through which the blower 2 draws the conditioned air in the underfloor space S1 into the housing 3. The housing body 31 also includes an air supply port 34 through which the conditioned air drawn by the blower 2 is supplied (blows upward) to the above-floor space S2. The housing body 31 also includes a guide portion 35 (see FIG. 2) that guides the conditioned air blown downward and to the sides from the outer periphery of the rotor 22 to above the rotor 22. The size and material of the housing 3 are not particularly limited as long as it is capable of accommodating and holding the blower 2. In this embodiment, the housing 3 is made of synthetic resin. The housing 3 may be made of metal or the like instead of synthetic resin.

[0020] Furthermore, the housing main body 31 has an opening 311 (see FIG. 3) through which the rotor 22 can be inserted and removed. This allows the user to easily clean the inside of the housing 3 and the rotor 22. Specifically, the user can take out the rotor 22 to the outside of the housing 3 through the opening 311. This allows the user to clean the rotor 22. Furthermore, the inside of the housing 3 from which the rotor 22 has been removed is free of the rotor 22 that may hinder cleaning. Moreover, the user can insert a hand or a cleaning tool into the housing 3 through the opening 311. This allows the user to easily clean the inside of the housing 3.

[0021] The shape and size of the opening 311 are not particularly limited as long as the rotor 22 can be inserted and removed. In this embodiment, the opening 311 is formed in a circular shape having a diameter slightly larger than the diameter of the rotor 22. The larger the size of the opening 311, the easier it is to insert and remove the rotor 22. However, the larger the size of the opening 311, the larger the size of the lid 32 must be. The larger the size of the lid 32, the heavier the lid 32 tends to be. Therefore, it is preferable to appropriately set the size of the opening 311 in consideration of the balance between the ease of inserting and removing the rotor 22 and the size of the lid 32.

[0022] When the rotor 22 rotates due to the rotational drive of the motor 23, the conditioned air in the underfloor space S1 (see FIG. 2) is taken into the inside of the rotor 22 through the air intake port 33. The conditioned air taken into the inside of the rotor 22 is blown out radially outward of the rotor 22. The conditioned air blown out radially outward of the rotor 22 is guided above the rotor 22 by the guide portion 35, and is blown out above the air intake device 1 through the air intake port 34. The air intake device 1 is disposed in a state where it is connected to the opening OP of the floor part FL so that the air intake port 34 communicates with the above-floor space S2 (see FIG. 2). Therefore, the conditioned air is supplied to the above-floor space S2 through the air intake port 34 and the opening OP.

[0023] As shown in FIG. 1, the lid 32 is configured to be attachable to the housing body 31 so as to partially cover the opening 311 of the housing body 31. The lid 32 is also configured to be detachable from the housing body 31. The lid 32 is attachable to the housing body 31 and detachable from the housing body 31, so that the safety of the air supply device 1 and the ease of cleaning the inside of the housing 3 and the rotor 22 can be achieved at the same time. Specifically, the lid 32 is attached to the housing body 31 so as to partially cover the opening 311 of the housing body 31, so that the possibility that the user will accidentally touch the rotor 22 while the rotor 22 is rotating, etc., can be reduced. Therefore, the safety of the air supply device 1 can be improved. Furthermore, the opening 311 is opened by removing the lid 32 from the housing body 31. Therefore, the ease of cleaning the inside of the housing 3 and the rotor 22 can be improved.

[0024] In this specification, "so as to partially cover the opening 311" means covering the opening 311 so as to secure an opening of an area smaller than the opening area of ​​the opening 311. By covering the opening 311 so as to secure an opening of an area smaller than the opening area of ​​the opening 311, the safety of the above-mentioned air supply device 1 can be secured and the air intake 33 can be secured. The air intake 33 is an opening that can send the conditioned air in the underfloor space S1 to the rotor 22. Therefore, by the cover 32 partially covering the opening 311 of the housing main body 31, the air supply device 1 can be secured while the safety of the air supply device 1 is secured and the air supply air in the underfloor space S1 can be sent to the rotor 22. The position, size and shape of the "opening of an area smaller than the opening area of ​​the opening 311" are not particularly limited as long as the air supply device 1 can be secured while the safety of the air supply device 1 is secured.

[0025] In this embodiment, the cover 32 has an intake port 33 capable of sending the conditioned air in the underfloor space S1 to the rotor 22 (see FIG. 1, FIG. 3 to FIG. 6). The intake port 33 is an opening that communicates the underfloor space S1 (see FIG. 2) with the internal space of the housing main body 31. When the rotor 22 rotates, the conditioned air in the underfloor space S1 is sucked into the housing main body 31 through the intake port 33. The sucked conditioned air is supplied to the above-floor space S2 through the air supply port 34. The shape and size of the intake port 33 are not particularly limited as long as it can send the conditioned air in the underfloor space S1 to the rotor 22. In this embodiment, the intake port 33 is formed in a position, size, and shape such that the multiple blades 221 of the rotor 22 are not visible when viewed from the outside of the housing 3 in the direction along the rotary drive shaft 21 (front-rear direction Y) (see FIG. 1). This makes it possible to reduce the possibility that a hand or the like will come into contact with the vane board 221 even if the hand or the like accidentally enters the housing 3 through the intake port 33. Therefore, the safety of the air supply device 1 can be ensured more reliably.

[0026] 3, the air intake 33 is located on an extension of the rotary drive shaft 21. More specifically, the center of the air intake 33 is located on an extension of the rotary drive shaft 21. This allows the conditioned air that has entered the housing 3 through the air intake 33 to flow intensively toward the radially inner side of the rotor 22. Therefore, the suction force caused by the rotation of the rotor 22 can be efficiently exerted on the conditioned air.

[0027] As shown in FIG. 6, the peripheral portion 332 of the intake port 33 (a portion having a certain width from the inner circumference of the intake port 33 to the radially outer side) is configured to have a shape capable of adjusting (rectifying) the flow of air from the outside to the inside in the central axis direction of the intake port 33. Specifically, the peripheral portion 332 of the intake port 33 protrudes from the outside to the inside in the central axis direction (front-rear direction Y) of the intake port 33 (from the front side to the rear side in the front-rear direction Y, from the left side to the right side in FIG. 6) and has a curved shape such that a cross section along the central axis direction is convex toward the central axis 331 (axis extending in the front-rear direction Y) of the intake port 33. That is, the peripheral portion 332 of the intake port 33 is configured to have a function of a bell mouth as a rectifying portion. As a result, the peripheral portion 332 of the intake port 33 can rectify the conditioned air in the underfloor space S1, and the conditioned air that has been rectified can be sent to the rotor 22. By sending the rectified conditioned air to the rotor 22, it is possible to improve the air blowing efficiency of the rotor 22. Therefore, it is possible to improve the air conditioning efficiency of the above-floor space S2.

[0028] The lid 32 has a rotation center 321 (see FIG. 1, FIG. 4, and FIG. 5) located on an extension of the rotary drive shaft 21. Since the lid 32 has the rotation center 321 located on an extension of the rotary drive shaft 21, the lid 32 can be rotated to be attached and detached as described later, and the position of the lid 32 coincides with the position of the rotor 22 in the vertical direction X and the width direction Z. In addition, when the lid 32 is removed from the housing main body 31, the position of the opening 311 coincides with the position of the rotor 22 in the vertical direction X and the width direction Z. This allows the user to easily take out the rotor 22 through the opening 311. In addition, the user can easily return the removed rotor 22 to its original position in the housing 3 through the opening 311. In this embodiment, the outer periphery of the lid 32 is formed in a circular shape. In addition, the opening 311 is formed in a circular shape according to the shape and size of the outer periphery of the lid 32. Therefore, the user can rotate the lid portion 32 around the center of rotation 321 while sliding the lid portion 32 along the inner circumference of the opening portion 311 .

[0029] The lid 32 and the housing main body 31 are configured so that the lid 32 can be attached to and detached from the housing main body 31 by rotating the lid 32 around the rotation center 321 while the lid 32 partially covers the opening 311 (see Figs. 1, 3 and 7). This allows the user to easily attach and detach the lid 32 to and from the housing main body 31 simply by rotating the lid 32 around the rotation center 321. In this embodiment, the lid 32 and the housing main body 31 are provided with an attachment / detachment mechanism 4 (see Fig. 7) so that they can be attached to and detached from each other by the above-mentioned rotation operation. The attachment / detachment mechanism 4 is not particularly limited in configuration as long as the lid 32 can be attached to and detached from the housing main body 31 by the rotation operation of the lid 32. In this embodiment, the attachment / detachment mechanism 4 includes an engagement portion 41 provided on the lid 32 and an engaged portion 42 provided on the housing main body 31. The engagement portion 41 and the engaged portion 42 are configured to be engaged with and detached from each other by the rotation operation of the lid 32. Specifically, the engaging portion 41 and the engaged portion 42 are configured to engage with each other by rotating the cover portion 32 in a first direction (e.g., clockwise when viewed from the front in the front-rear direction Y, see FIG. 4) about the rotation center 321. The engaging portion 41 and the engaged portion 42 are configured to be disengaged from each other by rotating the cover portion 32 in a second direction opposite to the first direction (e.g., counterclockwise when viewed from the front in the front-rear direction Y, see FIG. 4) about the rotation center 321.

[0030] In the example shown in FIG. 5, the engagement parts 41 are arranged along the outer periphery of the lid part 32 and are provided at a plurality of positions spaced apart from one another. In the example shown in FIG. 5, three engagement parts 41 are provided. As shown in FIG. 6 and FIG. 7, the engagement parts 41 are formed so as to protrude toward the housing main body 31 side along the front-rear direction Y. Specifically, the engagement parts 41 include a first extension part 411 protruding toward the housing main body 31 side along the front-rear direction Y, and a second extension part 412 extending from a tip end of the extension part 411 toward the radial outside of the lid part 32. The first extension part 411 and the second extension part 412 form an L-shaped engagement part 41 when viewed from the circumferential direction of the lid part 32.

[0031] In the example shown in FIG. 3, the engaged parts 42 are arranged along the inner circumference of the opening 311 in the housing main body 31 and are provided at a plurality of positions spaced apart from one another. In the example shown in FIG. 3, three engaged parts 42 are provided. As shown in FIG. 3 and FIG. 7, the engaged parts 42 are formed so as to extend along the inner circumference of the opening 311. Specifically, the engaged parts 42 include a first cutout part 421 (see FIG. 7) formed so as to cut out the inner circumference of the opening 311 radially outward, and a second cutout part 422 extending along the circumferential direction of the opening 311 from the rear end part of the first cutout part 421 in the front-rear direction Y. The first cutout part 421 and the second cutout part 422 form the L-shaped engaged part 42 when viewed from the radially inner side of the opening 311 (see FIG. 7). 7, the second cutout 422 is formed so that the depth of the cutout gradually decreases from the middle to the tip (hereinafter, the shallower portion is also referred to as a tapered portion 423). The bottom surface of the second cutout 422 is inclined in the front-rear direction Y at the tapered portion 423.

[0032] In the example shown in FIG. 3 and FIG. 7, in a state where the lid portion 32 is removed from the housing body 31, the lid portion 32 can be attached to the housing body 31 by operating the lid portion 32 as follows. First, the lid portion 32 is brought close to the housing body 31, and the engaging portion 41 of the lid portion 32 is inserted into the first notch portion 421 of the engaged portion 42 of the housing body 31 (see the arrow of the dashed line pointing to the engaged portion 42 side in FIG. 7). Next, the lid portion 32 is rotated around the rotation center 321 (see the arrow of the dashed line pointing to the engaged portion 42 side in FIG. 7). The rotation direction is a first direction (for example, clockwise when viewed from the front side in the front-rear direction Y). In the rotation operation, the second extension portion 412 of the engaging portion 41 is inserted into the tapered portion 423 of the second notch portion 422. This increases the contact pressure between the bottom surface of second extending portion 412 and second extending portion 412, causing the bottom surface of second extending portion 412 and second extending portion 412 to come into close contact with each other. Therefore, engaging portion 41 and engaged portion 42 engage with each other. This causes lid portion 32 to be attached to housing main body 31. When lid portion 32 is to be removed from housing main body 31, the above-described operation for attaching lid portion 32 to housing main body 31 may be performed in reverse.

[0033] In this embodiment, as shown in FIG. 1, FIG. 3, and FIG. 4, the lid 32 preferably has ribs 322 at multiple positions in the rotation direction of the lid 32. The ribs 322 are configured so that the user's fingertips can be hooked when the lid 32 is rotated around the rotation center 321, and can receive a rotation operation force from the fingertips. Specifically, each rib 322 is provided so as to extend along the radial direction of the lid 32. By having such ribs 322 on the lid 32, the user can hook the fingertips on the ribs 322 and apply a rotation operation force to the ribs 322 from the fingertips. This allows the user to easily rotate the lid 32. In this embodiment, the multiple ribs 322 are provided at positions along the outer periphery of the lid 32. This allows the user to apply a rotation operation force at a position far from the rotation center 321 of the lid 32. Therefore, the user can rotate the lid 32 with a small rotation operation force. Furthermore, by providing the ribs 322 at multiple positions in the rotational direction of the lid portion 32, the rigidity of the lid portion 32 can be increased. Therefore, deformation of the lid portion 32 due to temperature, humidity, and the like can be suppressed. This makes it possible to suppress the engagement and disengagement between the engaging portion 41 and the engaged portion 42 from becoming difficult. Therefore, the lid portion 32 can be easily attached to and detached from the housing main body 31 regardless of temperature, humidity, and the like.

[0034] In the present embodiment, the rib 322 is provided in a recess 323 provided in the lid 32. Specifically, the recess 323 is provided on the outer surface of the lid 32 (on the front side in the front-rear direction Y in the examples shown in Figs. 1, 3, and 4). For example, the recess 323 is provided in an annular groove shape along the rotation direction of the lid 32. The recess 323 has a depth and size that allows the user's fingertip to be inserted. The rib 322 is provided so as to divide the inside of the recess 323 into a plurality of compartments. For example, the rib 322 is provided so as to divide the inner space of the recess 323, which is formed in an annular groove shape, into a plurality of compartments in the circumferential direction of the ring. Since the rib 322 is provided in the recess 323 provided in the lid 32, a rotation operation force can be applied to the rib 322 from the user's fingertip when the user's fingertip is inserted into the recess 323. As a result, when a rotational operation force is applied to rib 322, the user's fingertip is held within recess 323, allowing the user to rotate cover 32 more reliably.

[0035] In this embodiment, the multiple ribs 322 are preferably provided around the periphery of the intake port 33. This allows the lid portion 32 to be rotated along the outer periphery of the intake port 33, making it easy to attach and detach the lid portion 32.

[0036] In this embodiment, the lid 32 and the housing main body 31 are preferably configured so that the lid 32 is attached to and detached from the housing main body 31 by rotating the lid 32 around the rotation center 321 at a predetermined rotation angle. The predetermined rotation angle is preferably greater than 0° and equal to or less than 45°. In this case, the user can attach and detach the lid 32 to and from the housing main body 31 by performing a rotation operation at a small rotation angle. Therefore, the user can attach and detach the lid 32 more easily. The predetermined rotation angle is more preferably 5° to 40°, and further preferably 10° to 30°. By the predetermined rotation angle being 5° to 40° or 10° to 30°, the user can easily recognize the sense that the lid 32 has been rotated reliably. Therefore, it is possible to achieve both the ease of the rotation operation of the lid 32 by the user and the sense that the rotation operation has been performed reliably.

[0037] In this embodiment, the housing body 31 preferably has a grip portion 5 for lifting the air intake device 1 (see Figs. 1 and 3). Furthermore, the grip portion 5 is preferably provided on the upper part of the housing 3. Since the housing body 31 has the grip portion 5 for lifting the air intake device 1 on the upper part of the housing 3, the user can easily lift the air intake device 1 by gripping the grip portion 5. In particular, when the air intake device 1 is disposed in the underfloor space S1 and the upper part of the housing 3 is visible from the opening OP of the floor part FL, the user can easily lift the air intake device 1 from the underfloor space S1 to the above-floor space S2 by gripping the grip portion 5 provided on the upper part of the housing 3. By lifting the air intake device 1 to the above-floor space S2, the lid portion 32 can be easily removed from the housing body 31. Then, with the lid portion 32 removed, the rotor 22 can be removed from the rotary drive shaft 21. Therefore, the lid portion 32 and the rotor 22 can be easily removed in the above-floor space S2.

[0038] Furthermore, the grip portion 5 preferably has an opening 51 (see FIG. 1) into which a user's finger can be inserted, and a supported portion 52 that can be supported by the pad of the finger inserted into the opening 51 when the finger is bent. By having such an opening 51 and supported portion 52 in the grip portion 5, the user can insert a finger into the opening 51 and support the supported portion 52 with the pad of the inserted finger. Therefore, the user can grip the grip portion 5 more easily and reliably. This makes it possible to reduce the possibility of accidentally dropping the air supply device 1 while lifting it up with a simple configuration. The configuration of the supported portion 52 is not particularly limited as long as the finger inserted into the opening 51 can be supported by the pad of the finger when the finger is bent. In this embodiment, the supported portion 52 is the back surface of the upper portion in which the opening 51 is formed in the housing main body 31. The upper portion in which the opening 51 is formed in the housing main body 31 is configured in a plate shape. Therefore, supported portion 52 is the back surface (lower surface) of the plate-shaped upper portion of housing body 31. Supported portion 52 preferably has an anti-slip function that prevents the pad of a finger from slipping on supported portion 52. For example, supported portion 52 preferably has an uneven portion that increases the frictional force with the pad of a finger. By having supported portion 52 have such uneven portion, it is possible to prevent the pad of a finger from slipping on supported portion 52. Therefore, it is possible to further reduce the possibility of accidentally dropping air supply device 1 when lifting it.

[0039] In the example shown in FIG. 1, the grip portion 5 has an opening 51 into which a user can insert multiple fingers (for example, two to four fingers among the index finger, middle finger, ring finger, and little finger of the hand), and a supported portion 52 that can be supported by the pads of the multiple fingers inserted into the opening 51 in a bent state. Since the grip portion 5 has such an opening 51 and a supported portion 52, the user can insert multiple fingers into the opening 51 and support the supported portion 52 with the pads of the multiple inserted fingers. Therefore, the ease and reliability of lifting the air supply device 1 can be further improved. Furthermore, the grip portion 5 has an abutment portion 53 against which the thumb of the user's hand abuts. In this embodiment, the abutment portion 53 is the surface (upper surface) of the upper portion where the opening 51 is formed in the housing main body 31. Since the grip portion 5 has the contact portion 53, the plate-shaped upper portion of the housing body 31 can be pinched between the thumb and other fingers (for example, the index finger, middle finger, ring finger, and little finger of the hand). This makes it possible to further improve the ease and reliability of lifting the air supply device 1.

[0040] In this embodiment, the grip 5 is provided at a position where the user can lift the air supply device 1 with one hand (one of both hands). Specifically, the grip 5 is provided at a position where the posture of the air supply device 1 is unlikely to change from the state before lifting (the posture is likely to be kept constant) when the user holds the grip 5 with one hand and lifts the air supply device 1. For example, the grip 5 is provided above the center of gravity of the air supply device 1 (for example, directly above or near the center of gravity). This keeps the posture of the air supply device 1 constant when the user holds the grip 5 and lifts the air supply device 1. Therefore, the air supply device 1 does not wobble when lifting it, and the ease and reliability of lifting the air supply device 1 can be further improved.

[0041] In this embodiment, the housing body 31 has, at its upper part, a flange portion 312 (see Figs. 1 to 3) extending outward along the horizontal direction. When the housing body 31 is inserted from above into the opening OP of the floor part FL (see Fig. 2), the flange portion 312 is configured to be supported by the upper surface of the periphery of the opening OP. As a result, the air supply device 1 is supported so as to be suspended from the periphery of the opening OP of the floor part FL.

[0042] In this embodiment, the air supply device 1 is provided with switches 6 (see FIG. 1) including a power switch and an air volume adjustment switch on the upper part of the housing body 31. By operating the switches 6, the power of the blower 2 can be turned on and off and the air volume of the blower 2 can be adjusted. In the example shown in FIG. 1, the switches 6 are provided between the air intake grill 342 and the blower 2 in the vertical direction X. When operating the switches 6, the air intake grill 342 is removed to expose the switches 6, whereby they can be operated.

[0043] Next, an example of a method of using the air intake device 1 according to this embodiment will be described with reference to Figs. 1 to 7. Specifically, a method of cleaning the inside of the housing 3 and the rotor of the air intake device 1 will be described. Note that since the air intake operation of the air intake device 1 to supply conditioned air is publicly known, a description thereof will be omitted. In the following, it is assumed that the air intake device 1 is disposed in the underfloor space S1. The air intake device 1 is suspended within the underfloor space S1 with its upper portion hooked onto the periphery of an opening OP in the floor FL.

[0044] First, the air intake grille 342 is removed from the air intake side opening 341 (see FIG. 1). This exposes the opening 51 of the grip part 5 (see FIGS. 1 and 2). Next, the user's finger is inserted into the opening 51 of the grip part 5, and the inserted finger is bent to support the supported part 52 with the pad of the finger. Next, with the supported part 52 supported by the pad of the user's finger, the air intake device 1 is lifted from the underfloor space S1 to the above-floor space S2.

[0045] Next, the air supply device 1 is placed on the floor FL or the like. Next, the user's fingertip is hooked on the rib 322 (see Figs. 1 and 4) of the lid 32, and a rotational operating force is applied from the fingertip to the rib 322. This causes the lid 32 to rotate around the rotation center 321 (see Figs. 3 to 5), and the engagement between the engagement portion 41 of the lid 32 and the engaged portion 42 of the housing main body 31 is released (see the arrow pointing to the engagement portion 41 side of the dashed line in Fig. 7). Next, the user grips the rib 322 and the inner periphery of the intake port 33 (see Figs. 1, 3 to 6), and the lid 32 is removed from the housing main body 31. This opens the opening 311.

[0046] Next, the user's hand is inserted into the housing main body 31 through the opening 311. Next, the user grips the fixed member 24, and rotates the fixed member 24 around the axis of the rotary drive shaft 21. This causes the fixed member 24 to be removed from the rotary drive shaft 21 (see FIG. 3). Next, the user grips the rotor 22, and the rotor 22 is removed from the rotary drive shaft 21. The removed rotor 22 is taken out of the housing main body 31 through the opening 311.

[0047] Next, the removed rotor 22 is cleaned by a known cleaning method. Also, the inside of the housing main body 31 from which the rotor 22 has been removed is cleaned by a known cleaning method. When the inside of the housing main body 31 is cleaned, a user's hand or a cleaning tool is inserted into the housing 31 through the opening 311. This makes it possible to easily clean the inside of the housing main body 31.

[0048] After cleaning of the rotor 22 and the inside of the housing body 31 is completed, the rotor 22 is returned into the housing body 31 and attached to the rotary drive shaft 21 (see FIG. 3). Specifically, the rotor 22 is inserted into the housing body 31 through the opening 311. The inserted rotor 22 is attached to the rotary drive shaft 21 using the fixing member 24. Next, the lid 32 is positioned so as to partially cover the opening 311. Next, the lid 32 is rotated around the rotation center 321. This causes the engaging portion 41 of the lid 32 and the engaged portion 42 of the housing body 31 to engage with each other (see FIGS. 1 and 7). Thus, the lid 32 is attached to the housing body.

[0049] Next, the user inserts a finger into the opening 51 of the grip part 5 (see FIG. 1), and the inserted finger is bent to support the supported part 52 with the pad of the finger. Next, the user lifts up the supported part 52 supported by the pad of the finger, and the air intake device 1 is lowered from the above-floor space S2 to the under-floor space S1 (see FIG. 2). The air intake device 1 is hung in the under-floor space S1 while being hooked on the periphery of the opening OP of the floor part FL. Next, the air intake grill 342 is attached to the intake side opening 341. This allows the air intake device 1 to return to its original state.

[0050] As described above, according to the air supply device 1 of this embodiment, the user can easily attach and detach the lid 32 to and from the housing main body 31 by simply rotating the lid 32 around the rotation center 321. Moreover, when attaching and detaching the lid 32 to and from the housing main body 31, it is not necessary to use a tool such as a screwdriver. Furthermore, the user can remove the rotor 22 from the rotary drive shaft 21 through the opening 311 that is opened by removing the lid 32 from the housing main body 31. Furthermore, the user can take out the rotor 22 removed from the rotary drive shaft 21 from the housing main body 31 through the opening 311. Therefore, the user can easily clean the rotor 22. Furthermore, the user can easily clean the inside of the housing 3 by inserting a hand or a cleaning tool through the opening 311 into the inside of the housing 3 with the rotor 22 removed. By cleaning the rotor 22 and the inside of the housing 3, it is possible to suppress a decrease in the air supply performance of the air supply device 1. Furthermore, the air supply device 1 can maintain its performance of supplying clean air. [Explanation of symbols]

[0051] 1 Air supply device 2. Blower 21 Rotating drive shaft 22 Rotor 221 Slats 222 Shaft insertion hole 23 Motor 24 Fixing member 3. Housing 31 Housing body 311 Opening 312 Flange part 32 Lid 321 Rotation Center 322 Rib 323 Recess 33 Air intake (suction port) 331 Central axis of the intake 332 Periphery 34 Air intake (outlet) 341 Air supply side opening 342 Air Intake Grill 35 Guide section 4. Detachable mechanism 41 Engagement part 411 First extension 412 Second extension 42 Engaged part 421 First notch 422 Second notch 423 Tapered section 5 Gripping part 51 Opening 52 Supported part 53 Contact part 6 Switches FL floor S1 Underfloor space S2 Above-floor space X vertical direction Y Front-rear direction Z width direction

Claims

1. An air supply device provided in an underfloor space of a house, The air supply device is A blower having a rotor detachably connected to a rotary drive shaft; a housing for accommodating the blower; The housing includes: a housing body having an opening through which the rotor can be inserted and removed; a cover portion that can be attached to the housing body so as to partially cover the opening of the housing body and that is detachable from the housing body; the cover portion has a rotation center located on an extension line of the rotation drive shaft, The lid portion and the housing main body are configured such that the lid portion is attached to and detached from the housing main body by rotating the lid portion about the rotation center in a state in which the lid portion partially covers the opening. Air supply device.

2. the lid portion has ribs at a plurality of positions in a rotation direction of the lid portion, The rib is configured to be capable of hooking a user's fingertip when the lid is rotated around the rotation center and to be capable of receiving a rotation operation force from the fingertip.

2. An air supply system as claimed in claim 1.

3. the cover portion has an air intake port capable of sending conditioned air in the underfloor space to the rotor blades, The plurality of ribs are provided around the intake port.

3. An air supply system as claimed in claim 2.

4. the lid portion and the housing main body are configured such that the lid portion is attached to and detached from the housing main body by rotating the lid portion around the rotation center by a predetermined rotation angle, The predetermined rotation angle is greater than 0° and less than or equal to 45°.

2. An air supply system as claimed in claim 1.

5. The housing body has a grip portion for lifting the air supply device, The grip portion is provided on an upper portion of the housing, The gripping portion is an opening into which a user's finger can be inserted; and a supported portion that can be supported by the pad of a finger inserted into the opening in a bent state.

2. An air supply system as claimed in claim 1.

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