Fan unit and bathroom heating / drying device equipped with same

Abstract

To provide a fan unit capable of properly preventing or suppressing fire spread due to heat generation and ignition of a wiring take-out part of a fan motor.SOLUTION: A fan unit FU includes: a motor M for fan drive; a supporting member 2 for forming a concave part 20 for storing the motor M; and a pressing member 5 for pressing the motor M so as to be fixed inside the concave part 20. The motor M is constituted in such a manner that a wiring take-out part 61 is provided at a peripheral wall part 60 of a motor case 6. At the pressing member 5, a fire spread prevention cover part 50 is provided which covers the wiring take-out part 61 being positioned above the wiring take-out part 61 so as to shield the flame when ignition occurs in the wiring take-out part 61, and which has fire retardancy.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a fan unit used for bathroom ventilation, etc., and a bathroom heating and drying apparatus equipped with the same. [Background technology]

[0002] The present applicant has previously proposed the one described in Patent Document 1 as a specific example of a fan unit. The fan unit described in this document is a unit that constitutes part of a bathroom heater / dryer, and is used to ventilate the bathroom and other rooms. In this fan unit, the motor for driving the fan is housed in a recessed portion provided in a support member and is held down by a predetermined holding member, thereby fixing the motor in place. This configuration makes it easy to install the motor.

[0003] However, there is still room for improvement in the above-mentioned conventional techniques.

[0004] That is, fan motors tend to become high-temperature heat sources during operation, and bathroom heaters and dryers are installed in high-humidity environments and used for long periods of time, so this tendency is even stronger. On the other hand, fan motors are not uniformly prone to heat generation and ignition throughout, and the wiring outlet of the motor is one of the parts of the motor that is particularly prone to heat generation and ignition. However, in the past, no special measures have been taken for such wiring outlets. In Patent Document 1, measures are taken to prevent tracking phenomena in the wiring outlets, but no measures are taken to appropriately prevent or suppress the spread of fire in the event of heat generation or ignition in the wiring outlets. Therefore, there is still room for improvement in terms of increasing reliability in terms of safety. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-193750 A Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention was conceived in light of the circumstances described above, and has as its objective to provide a fan unit that can appropriately prevent or suppress the spread of fire caused by heat generation and ignition at the wiring outlet of the fan motor, and a bathroom heating and drying device equipped with such a fan unit. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides the following technical solutions.

[0008] A fan unit provided according to a first aspect of the present invention comprises a motor for driving a fan, a support member forming a recessed portion for accommodating the motor, and a pressing member for pressing the motor so as to fix it within the recessed portion, the motor being configured such that a wiring outlet is provided on a peripheral wall portion of a motor case, the pressing member being provided with a fire spread prevention cover portion which is flame retardant and which is positioned above the wiring outlet to cover the wiring outlet and is capable of blocking the flame in the event of a fire occurring at the wiring outlet. An upwardly extending wall portion is provided adjacent to an upper portion of a region of the support member that faces the wiring outlet portion of the recessed portion, while the fire spread prevention cover portion is located above the upright wall portion and extends radially outward or widthwise outward of the recessed portion beyond the upright wall portion, and a gap is formed between the upper end portion of the upright wall portion and the fire spread prevention cover portion, so that they are not in contact with each other. It is characterized by the presence of Here, "flame retardant" means that it has the function of showing resistance to flames, delaying the time until ignition, or suppressing the amount or rate of combustion. Therefore, it does not necessarily mean that it complies with a specific standard. In addition, "flame retardant" in the present invention also includes non-flammability.

[0009] According to this configuration, the following effects can be obtained. First, the fire prevention cover is flame retardant and is located above and covers the motor's wiring outlet, so that in the unlikely event of a fire occurring at the wiring outlet, it is possible to prevent the spread of the flames. This provides the effect of appropriately preventing or suppressing the spread of fire caused by heat generation and ignition at the motor's wiring outlet. Secondly, the fire prevention cover is attached to the pressing member used to secure the motor, so the configuration is rational. It is possible to suppress an increase in the number of parts and assembly steps, and to eliminate the problem of a significant increase in manufacturing costs. Thirdly, since the fire spread prevention cover portion extends radially outward or widthwise outward from the concave portion further than a specified upwardly facing wall portion, and the size of the fire spread prevention cover portion is increased, the fire spread prevention effect of the fire spread prevention cover portion is enhanced. Fourth, since the upper end of the upright wall portion can be brought close to the fire prevention cover portion and the gap between them can be reduced, it is expected that in the event of a fire at the wiring outlet of the motor, the flames will be prevented from spreading outward through the gap. Fifth, unlike the above-mentioned configuration, if the upper end of the standing wall abuts against the fire spread prevention cover, vibrations caused when the motor is driven may be transmitted to the abutment point between the fire spread prevention cover and the standing wall, which may cause abnormal noise (the sound of them colliding). In contrast, the above-mentioned configuration makes it possible to appropriately avoid such a risk.

[0010] In the present invention, preferably, the support member is made of resin, and the area of ​​the inner surface of the recess that faces the wiring outlet is a flame-retardant area covered with a flame-retardant metal layer. Here, the metal layer corresponds to a metal foil tape such as an aluminum tape.

[0011] According to this configuration, the following effects can be obtained. In other words, a certain area of ​​the support member that supports the motor and faces the wiring outlet is at risk of coming into contact with flames in the event of a fire at the wiring outlet of the motor. In contrast, such an area is made a flame-retardant area covered with a metal layer, which also has the effect of suppressing fire at the support member.

[0014] In the present invention, preferably, a first mark for aligning the wiring outlet portion with a predetermined portion of the support member when the motor is placed in the recessed portion is integrally formed on the support member as a three-dimensional mark.

[0015] According to this configuration, when the motor is placed in the recess of the support member during assembly of the fan unit, the first mark can be used to properly align the wiring outlet of the motor with a predetermined portion of the support member, thereby improving the accuracy and speed of the assembly work. Also, since the first mark is integrally molded as a three-dimensional mark on the support member, it can be provided at the same time as the support member is resin-molded. Compared with providing the first mark by means of printing or taping, this method has good productivity and can reduce manufacturing costs.

[0016] In the present invention, preferably, the clamping member is integrally molded with a second mark as a three-dimensional mark for aligning the fire prevention cover portion with the wiring outlet portion when the clamping member is attached to hold down the motor.

[0017] According to this configuration, when the pressing member is attached during assembly of the fan unit, the second mark can be used to properly align the fire spread prevention cover with the wiring outlet. Since the second mark is molded integrally with the pressing member as a three-dimensional mark, it can be easily provided when the pressing member is molded from resin. This results in good productivity and allows for low manufacturing costs.

[0018] In the present invention, preferably, a laminate tape having a glass cloth laminated and bonded onto a metal foil tape is applied to the area of ​​the motor that is to be prevented from spreading fire.

[0019] According to this configuration, the laminate tape can effectively prevent ignition from the area of ​​the motor that is to be prevented from spreading fire. The laminate tape has the excellent flame retardancy (non-combustibility) of the metal foil tape and is bonded to the glass cloth, and thus has the flexibility and ease of handling of the glass cloth. Although the metal foil tape has excellent flame retardancy (non-combustibility), it is easily torn when handled alone and workers are likely to injure their fingers. In contrast, the configuration described above eliminates such concerns, making it possible to improve the efficiency of tape application work and the finishing quality.

[0020] A bathroom heating and drying apparatus provided according to a second aspect of the present invention is characterized in that it includes the fan unit provided according to the first aspect of the present invention.

[0021] With this configuration, it is possible to obtain the same effects as those described for the fan unit provided according to the first aspect of the present invention.

[0022] Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0023] [Figure 1] 1 is a perspective view showing an example of a bathroom heating and drying device according to the present invention. [Diagram 2] FIG. 2 is an exploded perspective view of the bathroom heating and drying device shown in FIG. [Diagram 3] 3A is a schematic cross-sectional view taken along line IIIa-IIIa in FIG. 2, and FIG. 3B is a schematic cross-sectional view taken along line IIIb-IIIb in FIG. [Figure 4] 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 2 and an enlarged view of a main portion thereof. [Diagram 5] 3 is an enlarged perspective view of a main portion of a fan unit, which is a component part of the bathroom heating / drying device shown in FIGS. 1 and 2. FIG. [Figure 6] FIG. 6 is a perspective view of an example of an exploded state of the portion shown in FIG. 5. [Figure 7] 6 is a perspective view of another example of the exploded state of the portion shown in FIG. 5. FIG. [Figure 8] FIG. 7A is a cross-sectional view taken along the line VIIIa-VIIIa in FIG. 6, and FIG. 7B is a cross-sectional view of a main part showing an example of the case where the laminate tape shown in FIG. [Figure 9] FIG. 2 is a perspective view showing an example of a motor before laminating tape is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0025] Bathroom heating and drying apparatus A shown in Figures 1 and 2 is made up of an apparatus main body unit B and a fan unit FU. Generally speaking, apparatus main body unit B has the function of heating the bathroom, and fan unit FU has the function of a ventilation fan.

[0026] The bathroom heating and drying device A of this embodiment is characterized primarily by the configuration of the fan unit FU, but the basic configuration of the device main unit B is the same as that of a known device, so this will be explained briefly. That is, as shown in Fig. 3(a), device main unit B has a configuration in which a fan 15 (impeller) and a heat exchanger 12 as air heating means are incorporated inside a main body case 10 that is open at the bottom. Main body case 10 is attached to the ceiling panel 90 of the bathroom, and when fan 15 rotates, air from the bathroom is sucked into main body case 10 through intake port 91, passes through heat exchanger 12 where it is heated, and is then returned to the bathroom through outlet port 92. Heat exchanger 12 is capable of heating the air using hot water supplied from a water heater, for example. The apparatus main body unit B has a motor (not shown) for driving and rotating the fan 15, and is preferably provided with a fire prevention means for this motor. However, in this embodiment, the fire prevention means intended by the present invention is provided in the fan unit FU, and a description of the fire prevention means for the motor in the apparatus main body unit B will be omitted.

[0027] The fan unit FU is attached to the device main unit B. An opening 11 is formed in the side wall of the main body case 10 of the device main unit B, as shown in Figs. 2 and 3(a), and the fan unit FU is attached to a location corresponding to this opening 11. When the fan unit FU is operated, air in the bathroom is exhausted to the outside, and the bathroom is ventilated. However, the fan unit FU can ventilate other rooms, such as a dressing room, in addition to ventilating the bathroom. If the intake duct 82 shown in Figs. 1 and 2 is connected to a ventilation port provided in the ceiling of the dressing room, for example, it is possible to draw air from the dressing room into the fan unit FU and exhaust it to the outside through the exhaust duct 81.

[0028] As shown in Figures 3(b) and 4, the fan unit FU includes a unit case C, a fan 3 (impeller) arranged within the unit case C, a fan casing 4 surrounding the fan 3, a motor M for rotating the fan 3, a support member 2 for supporting the motor M, and a pressing member 5 for fixing the motor M.

[0029] The unit case C is substantially rectangular, and its side wall is provided with an intake opening 80 for communicating with the opening 11 provided in the device main body unit B, an exhaust duct 81, an intake duct 82, and the like. The fan 3 is, for example, a sirocco fan type, and is attached to the output shaft 66 of the motor M. The fan casing 4 forms an intake port 40 and an exhaust port 41 for the fan, and when the fan 3 rotates, air that has flowed into the unit case C from the intake opening 80 flows from the intake port 40 to the exhaust port 41 and is exhausted to the outside via the exhaust duct 81.

[0030] The motor M itself is similar to conventional motors, with a rotor, stator, bearings, etc. (not shown) housed within a motor case 6 which is generally disk-shaped, and a wiring outlet 61 is provided on a generally cylindrical peripheral wall 60 of the motor case 6, from which wiring 68 serving as lead wires is pulled out to the outside of the motor case 6.

[0031] As shown in Fig. 6, laminate tape 7 (a dot pattern portion) is affixed to a specific area of ​​motor M that is to be prevented from spreading fire. For example, a portion of motor M indicated by reference character P in Fig. 9 corresponds to a specific example of an area to be prevented from spreading fire, and is a portion that is more likely to generate heat and catch fire than other general parts of motor M. In contrast, in this embodiment, such an area to be prevented from spreading fire is covered with laminate tape 7.

[0032] As shown in FIG. 8(a), the laminate tape 7 is a tape in which an aluminum glass cloth 71 is laminated and bonded onto an aluminum tape 70. The aluminum tape 70 and the aluminum glass cloth 71 correspond to specific examples of the metal foil tape and the glass cloth, respectively, as referred to in the present invention. In the laminate tape 7, the aluminum tape 70 and the aluminum glass cloth 71 are laminated and bonded together before being attached to the motor case 6, and the aluminum tape 70 is provided with an adhesive layer 72 covered with a release paper (not shown). Therefore, as shown in FIG. 8(b), in the attachment operation to the motor case 6, the aluminum tape 70 and the aluminum glass cloth 71 can be attached simultaneously. In many cases, the area around the wiring outlet 61 of the peripheral wall 60 of the motor M is also prone to heat generation and ignition. Although not shown in the drawings, the laminate tape 7 is also attached to such an area so as not to impede the outlet of the wiring 68.

[0033] 3(b), 4 and 6, the support member 2 is a member forming a bowl-shaped recessed portion 20 for accommodating the motor M, and in this embodiment, is the upper plate portion of the unit case C, and is a resin plate that is generally rectangular in plan view and has a plurality of convex ribs 29 extending crosswise and vertically formed on the upper surface thereof. The motor M is accommodated in the recessed portion 20 in a so-called vertically placed position (a position in which the central axis of the motor M extends in the vertical direction), and its output shaft 66 passes downward through a hole 20a provided in the bottom portion of the recessed portion 20 to support the fan 3.

[0034] The holding member 5 is a member for holding down and fixing the motor M from above, and as shown in Figures 6 and 7, it is generally a plate-like shape that is generally circular in plan view, and is provided with a fire spread prevention cover 50. The holding member 5 is made of a flame-retardant resin, and its flame-retardant grade is, for example, 5VA of the UL94 standard. However, as already mentioned, the flame-retardant property in the present invention only needs to exhibit resistance to flames, delay the time until ignition, or suppress the amount of combustion or the rate of combustion, and does not necessarily mean conformity to a specific standard, and also includes non-flammability.

[0035] The pressing member 5 is screwed to the support member 2 and presses the motor M downward to fix it. More specifically, a plurality of seats 22 with screw holes 21 are provided at a position near the upper part of the recessed portion 20 of the support member 2. Meanwhile, the pressing member 5 has holes 51 for inserting a plurality of screws 98 that screw into the screw holes 21, and is attached to the seats 22 by using these screws 98. A cylindrical portion 52 that fits onto a cylindrical step portion 69 protruding from the upper surface of the motor M is provided at a portion near the center of the pressing member 5, thereby preventing the motor M from shifting in position in the horizontal direction.

[0036] Of the inner peripheral surface of the recessed portion 20 of the support member 2, the facing region Sa facing the wiring outlet portion 61 of the motor M is formed as a recessed portion that is partially recessed radially outward of the recessed portion 20, and is a flame-retardant region to which aluminum tape 7A is attached. This aluminum tape 7A corresponds to a specific example of a flame-retardant metal layer as referred to in the present invention, but the type and method of providing the metal layer are not limited, and it may be a vapor deposition layer. Note that, unlike the laminate tape 7 described above, the aluminum tape 7A is configured such that no aluminum glass cloth is laminated (so that the aluminum glass cloth does not come into direct contact with flames). An upwardly extending wall portion 23 is provided on the upper portion of the aforementioned facing area Sa of the support member 2, and the inside of this wall portion 23 (the side where the motor M is disposed) is also covered with the aluminum tape 7A. Note that reference numeral 23a in FIG. 6 denotes a rib that stands along the wall portion 23.

[0037] The fire spread prevention cover portion 50 of the pressing member 5 is a plate-shaped portion having a substantially rectangular shape in a plan view, and is located above the facing area Sa and covers the wiring extraction portion 61. 4, the bar portion 50 has a size that extends radially outward from the recessed portion 20 by an appropriate dimension La with respect to the standing wall portion 23. Although the upper end portion of the standing wall portion 23 is close to the lower surface portion of the fire spread prevention cover portion 50, a minute gap c1 of width Lb is formed between them, and the standing wall portion 23 and the fire spread prevention cover portion 50 are not in contact with each other.

[0038] The upper surface of the support member 2 is provided with a nearly circular frame-shaped wall portion 24 into which the pressing member 5 is fitted, and a gap c2 is formed between one end of the frame-shaped wall portion 24 and the standing wall portion 23 (see Figs. 6 and 7). The wiring 68 of the motor M passes through the gap c2 and is drawn from inside the unit case C to the outside.

[0039] A pair of ribs 25 are provided on the upper surface of the support member 2 as alignment marks. A notch 55 is also provided on the pressing member 5 as an alignment mark. The pair of ribs 25 and the notch 55 correspond to specific examples of the first and second marks according to the present invention.

[0040] The pair of ribs 25 are provided on the upper surface of the support member 2 in a position adjacent to the rear side of the upright wall portion 23, and are formed integrally with the support member 2. The pair of ribs 25 are disposed in a position corresponding to the facing area Sa to which the aluminum tape 7A is affixed. When the motor M is housed in the recessed portion 20 of the support member 2, if the wiring outlet portion 61 is set to face the area between the pair of ribs 25, the wiring outlet portion 61 can be appropriately opposed to the facing area Sa.

[0041] The notch 55 is provided in the vertical wall 56 which is the connection between the fire spread prevention cover 50 and other parts of the pressing member 5, and is a portion which is molded integrally with the pressing member 5. When the pressing member 5 is attached to the support member 2 to press the motor M downward after the motor M is accommodated in the recessed portion 20, the position of the wiring outlet 61 of the motor M can be visually confirmed through the notch 55, making it possible to confirm the position of the wiring outlet 61.

[0042] Next, the operation of the fan unit FU and the bathroom heating / dryer apparatus A equipped with it will be described.

[0043] First, the fire spread prevention cover 50 is flame retardant, and is located above and covers the wiring outlet 61 of the motor M. Therefore, even if a fire should break out at the wiring outlet 61, the fire spread prevention cover 50 can suppress the spread of the flames, thereby preventing the spread of the fire. Because the fire spread prevention cover 50 is provided on the pressing member 5, there is no problem such as an increase in the number of parts, and it is possible to reduce the manufacturing cost of the fan unit FU.

[0044] On the other hand, the facing area Sa of the recessed portion 20 of the support member 2 facing the wiring outlet portion 61 of the motor M is a flame-retardant area covered with aluminum tape 7A, so that the effect of suppressing ignition in this area is also appropriately obtained. In addition, the standing wall portion 23 is connected to the upper portion of the facing area Sa, but the fire spread prevention cover portion 50 extends radially outward from the standing wall portion 23 by an appropriate dimension La, and is enlarged, which improves the fire spread prevention effect. In addition, the fire spread prevention cover portion 50 and the upper end of the standing wall portion 23 are not in contact with each other, so that it is possible to avoid the risk of abnormal noise being generated when the fire spread prevention cover portion 50 and the standing wall portion 23 come into contact with each other due to vibration during driving of the motor M. On the other hand, although a gap c1 is formed between the fire spread prevention cover portion 50 and the upper end portion of the upright wall portion 23, this gap c1 has a very small width Lb, so it is also possible to appropriately prevent a flame generated at the wiring outlet portion 61 of the motor M from spilling out of the unit case C through the gap c1.

[0045] As described above, the fan unit FU is provided with a pair of ribs 25 that serve as a mark for aligning the wiring outlet 61 when the motor M is accommodated in the recessed portion 20 of the support member 2, and the pressing member 5 is provided with a notch 55 that serves as a mark for checking the position of the wiring outlet 61 of the motor M. Furthermore, since the pair of ribs 25 are integrally molded with the support member 2 and the notch 55 is integrally molded with the pressing member 5, there is no need to apply paint or stick tape as a means for providing a mark for alignment, which is convenient.

[0046] As described above, the laminate tape 7 is attached to the periphery of the wiring outlet 61, which corresponds to the area of ​​the motor M that is subject to fire spread prevention. This makes it possible to suppress fire in the periphery of the wiring outlet 61. The laminate tape 7 is configured by laminating and adhering the aluminum glass cloth 71 onto the aluminum tape 70, and therefore has the excellent flame retardancy (non-combustibility) of the aluminum tape 70 as well as the flexibility and ease of handling of the aluminum glass cloth 71. The aluminum tape 70 alone has the disadvantage that it is easily torn during handling, but by laminating and adhering the aluminum glass cloth 71, this risk is eliminated.

[0047] The present invention is not limited to the above-described embodiment, and the specific configurations of the fan unit and bathroom heating / drying apparatus according to the present invention can be modified in various ways within the intended scope of the present invention.

[0048] The fan is not limited to a sirocco fan type, and may be of other types and shapes. The specific type of motor (drive / control method, etc.) is not important. The fire spread prevention cover part only needs to have flame retardancy and be provided on the pressing member so as to cover the upper part of the wiring outlet of the motor, and may be of a shape, size, and material different from those of the fire spread prevention cover part of the above-mentioned embodiment. The pressing member and the fire spread prevention cover part which is a part of the pressing member may be made of metal. The specific shape, material, size, etc. of the pressing member and the support member referred to in the present invention are not limited.

[0049] The first and second marks in the present invention are not limited to the pair of ribs 25 and the notch 55, and may be other three-dimensional shapes instead of these. They may also be protrusions different from ribs, or shapes like scale lines, or convex parts showing arrows, etc.

[0050] In the above-mentioned embodiment, the laminate tape is configured as a tape in which an aluminum glass cloth is laminated and bonded onto an aluminum tape, but is not limited thereto. The laminate tape in the present invention may also be configured as a laminate in which a glass cloth other than the aluminum glass cloth is bonded onto a metal foil tape other than an aluminum tape.

[0051] A bathroom heating and drying device is a device that has the function of heating and drying a bathroom, and as a means for heating the air in the bathroom, heating means other than, for example, a hot water heat exchanger can be used. In the above embodiment, fan unit FU is not installed inside main unit B of bathroom heating / drying apparatus A, but is attached to its outside and used as a ventilation fan, but the fan unit of the present invention is not limited to this. It can be configured as a fan unit installed inside the bathroom heating / drying apparatus, and can also be configured as a circulation fan used, for example, to draw in and heat and blow air from the bathroom instead of for ventilation. [Explanation of symbols]

[0052] A Bathroom heating and drying device B Main unit C Unit Case FU Fan Unit Medium motor Sa opposing area (area facing the motor wiring exit) C1 Gap 2 Support member 20 Concave part 23 Standing wall section 25 Rib (First landmark) 3 Fan 5 Holding member 50 Fire prevention cover 55 Notch (second mark) 6 Motor case 60 Peripheral wall section 61 Wiring outlet 7 Laminated Tape 7A Aluminum tape (metal layer) 70 Aluminum tape (metal foil tape) 71 Aluminum glass cloth (glass cloth)

Claims

1. A motor for driving a fan; a support member defining a recess for accommodating the motor; a pressing member that presses the motor so as to fix it in the recess; Equipped with The motor is a fan unit having a configuration in which a wiring outlet is provided on a peripheral wall of a motor case, the pressing member is provided with a fire-prevention cover portion that is positioned above the wiring outlet portion, covers the wiring outlet portion, and has flame retardancy so as to be able to block the flame when a fire occurs at the wiring outlet portion; an upwardly extending wall portion is provided adjacent to an upper portion of a region of the support member that faces the wiring outlet portion of the recessed portion, while the fire spread prevention cover portion is located above the upwardly extending wall portion and extends radially outward or widthwise outward from the recessed portion beyond the upwardly extending wall portion; A fan unit, characterized in that a gap is formed between the upper end of the upright wall portion and the fire spread prevention cover portion, and they are not in contact with each other.

2. 2. The fan unit according to claim 1, A fan unit, wherein the support member is made of resin, and the area of ​​the inner surface of the recessed portion facing the wiring outlet portion is a flame-retardant area covered with a flame-retardant metal layer.

3. 3. A fan unit according to claim 1 or 2, A fan unit in which a first mark is integrally molded on the support member as a three-dimensional mark for aligning the wiring outlet portion with a specified portion of the support member when the motor is placed in the recessed portion.

4. 4. The fan unit according to claim 3, A fan unit in which a second mark is integrally molded as a three-dimensional mark on the pressing member for aligning the fire prevention cover portion with the wiring outlet portion when the pressing member is attached to hold down the motor.

5. A fan unit according to any one of claims 1 to 4, A laminate tape in which glass cloth is laminated and bonded onto a metal foil tape is affixed to an area of ​​the motor that is to be prevented from spreading fire.

6. 6. A bathroom heating and drying device comprising the fan unit according to claim 1.

Images