Bathroom heating and drying equipment

Abstract

To provide a bathroom heating / drying device 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 bathroom heating / drying device A includes a fan motor 2. This motor M includes a motor case 6 having a peripheral wall part 60, and a wiring take-out part 61 provided at the peripheral wall part 60, and it is set in a horizontal installation mode in which a central axis CL of the motor case 6 extends in the direction crossing with respect to the vertical height direction. The motor M is in a specific posture in which the wiring take-out part 61 is positioned on one end part in the left-to-right lateral width direction of the motor case 6. The bathroom heating / drying device also includes a cover 4 for fire spread prevention which covers the wiring take-out part 61 and which has fire retardancy.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a bathroom heating / drying device. [Background technology]

[0002] A specific example of a bathroom heating and drying device is described in Patent Document 1. The bathroom heater / dryer described in the document is intended to be installed in the ceiling of a bathroom and is equipped with a fan, a motor for driving the fan, and a heat exchanger for heating, all housed in a case that is open at the bottom. Air from the bathroom is drawn into the case by the fan and sent to the location where the heat exchanger is installed, where it is heated and then returned to the bathroom.

[0003] In such bathroom heater / dryer devices, a cross-flow type fan (impeller) is often used, with the fan oriented so that its central axis extends horizontally, a motor is placed next to the fan, and the output shaft of the motor is connected to the impeller. The motor tends to become a high-temperature heat source during operation, and this tendency is even stronger in bathroom heater / dryer devices that are installed in high-humidity environments and used for long periods of time. Therefore, in Patent Document 1, a metal vapor deposition film is formed on the inner surface of the resin case that houses the motor to prevent the spread of fire in the event of a fire starting from the motor.

[0004] However, the above-mentioned conventional techniques still have room for improvement, as described below.

[0005] In other words, a fan motor is not uniformly prone to heat generation and ignition throughout, and the motor's wiring outlet is one of the parts of the motor that is particularly prone to heat generation and ignition. However, in the past, no special measures were taken for such wiring outlets. This has led to concerns about the spread of fire due to heat generation and ignition at the wiring outlets, and it is desirable to appropriately resolve this issue. In general, the motor has a disk-shaped motor case with a wiring outlet provided on the peripheral wall. However, if a fire occurs at the wiring outlet, the way the flame spreads will differ depending on whether the wiring outlet is located on the upper or lower side of the motor case. Therefore, it is necessary to deal with this situation appropriately. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2020-122586 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was devised in light of the circumstances described above, and its objective is to provide a bathroom heating and drying device that can appropriately prevent or suppress the spread of fire caused by heat generation and ignition at the wiring outlet of the fan motor. [Means for solving the problem]

[0008] In order to solve the above problems, the present invention provides the following technical solutions.

[0009] The bathroom heating and drying apparatus provided by the present invention is a bathroom heating and drying apparatus comprising a motor for a fan, the motor comprising a motor case having a peripheral wall and a wiring outlet provided on the peripheral wall, and the motor case is arranged in a horizontally placed configuration with the central axis of the motor case extending in a direction intersecting the vertical height direction, the motor being in a specific position with the wiring outlet located at one end of the motor case in the left-right width direction and facing approximately horizontally, and further comprising a fire-retardant cover for preventing the spread of fire that covers the wiring outlet. The fire spread prevention cover is provided with a mark for aligning the wiring outlet, and the motor can be set to the specific position by aligning the wiring outlet with the mark. 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.

[0010] According to this configuration, the following effects can be obtained. That is, the motor for the fan is in a predetermined horizontal orientation, but the wiring outlet provided on the peripheral wall of the motor case is located at one end of the motor case in the left-right width direction and is oriented in a substantially horizontal direction. Therefore, even if the wiring outlet ignites, the flame will have a simple shape that spreads forward and upward of the wiring outlet without making much contact with the motor case. Unlike the present invention, if the wiring outlet is located, for example, at or near the bottom of the motor case, the upward flame will hit the motor case and will not have a simple shape. On the other hand, since the fire prevention cover has flame retardancy and covers the wiring outlet, it is possible to suppress the spread of flames from the wiring outlet, but in the present invention, as described above, if the wiring outlet catches fire, the flame spreads in a simple manner from the wiring outlet located at one end of the motor case in the left and right width directions to the front and upward. Therefore, by simply arranging the fire prevention cover along the motor case, it is possible to appropriately block the flame and reliably suppress the spread of the flame. As a result, it is possible to obtain an effect of appropriately preventing or suppressing the spread of fire caused by heat generation and ignition at the wiring outlet of the motor. Unlike the present invention, when the wiring outlet is located at or near the bottom of the motor case, as described above, the flame hits the motor case and does not take a simple shape, so it is difficult to adequately block the entire flame with a fire prevention cover. Also, when the wiring outlet is located at or near the top of the motor case, the flame is prevented from hitting the motor case, but it is necessary to install a fire prevention cover above the motor case, which makes the structure complicated. According to the present invention, it is possible to avoid such problems. Furthermore, with this configuration, when assembling the bathroom heating and drying device, the markings on the fire prevention cover can be used to quickly and properly set the motor in the specific position (a position in which the wiring outlet is located at one end of the motor case in the left-right width direction and faces approximately horizontally).

[0011] In the present invention, the fire spread prevention cover preferably has walls located in front of, above, and on both the left and right sides of the wiring outlet portion to cover the wiring outlet portion.

[0012] According to this configuration, if the wiring outlet portion catches fire, the flames spreading from the wiring outlet portion can be more appropriately blocked by the wall portion of the fire prevention cover, thereby further improving the fire spread prevention effect.

[0013] In the present invention, preferably, an opening is provided between the lower part of the fire prevention cover and the peripheral wall of the motor, enabling the wiring of the motor to be pulled out from the inside of the fire prevention cover to the lower outside.

[0014] With this configuration, the wiring of the motor can be properly led from the inside to the outside of the fire prevention cover.

[0017] In the present invention, the fire spread prevention cover is preferably a resin molded product, and the mark is preferably a three-dimensional mark molded integrally with the fire spread prevention cover.

[0018] According to this configuration, it is not necessary to provide the mark by painting the fire prevention cover or attaching a non-flammable printed matter to the cover, but the mark can be provided when the fire prevention cover is molded from resin, which results in good productivity and low manufacturing costs.

[0019] In the present invention, preferably, the marker is a rib provided on the inner surface of the fire prevention cover and extending in the vertical direction, and by matching the height of a predetermined point of the wiring outlet portion with the vertical end of this rib, the motor can be set to the specific posture.

[0020] With this configuration, the end of the rib is easily recognizable as a marker, and it is easy to align the motor wiring outlet with this position. Although there is a risk that the motor may come into contact with the rib during such alignment work, the rib can be made to have a high strength so that it will not be easily damaged.

[0021] In the present invention, preferably, the fire spread prevention cover extends downward beyond the end portion of the rib.

[0022] According to this configuration, the fire spread prevention cover is sized to extend downward below the wiring outlet of the motor, thereby making it possible to further improve the fire spread prevention effect.

[0023] 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.

[0024] According to this configuration, the laminate tape can effectively suppress 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 therefore 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, by laminating and bonding the glass cloth tape, such concerns are eliminated. This makes it possible to improve the efficiency of the tape application work and the finishing quality.

[0025] 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]

[0026] [Figure 1] 1 is a schematic perspective view showing an example of a bathroom heating and drying device according to the present invention. [Diagram 2] FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 3 is a schematic perspective view of the main parts of the bathroom heating and drying device shown in FIGS. 1 and 2. [Figure 4] FIG. 4 is an exploded perspective view of FIG. [Diagram 5] 4(a) is a side view taken along line Va in FIG. 3, and (b) is a partially cutaway cross-sectional side view of (a). [Figure 6] 6 is a plan view of a main part taken along line VI in FIG. 3. [Figure 7] FIG. 7 is a bottom view of the main part of FIG. 6. [Figure 8] FIG. 2A is a perspective view of a fire spread prevention cover, and FIG. 2B is a perspective view of the fire spread prevention cover of FIG. 2A turned upside down. [Figure 9] FIG. 5(a) is a perspective view of the motor shown in FIGS. 3 and 4, and (b) is a perspective view of the motor in (a) before a laminate tape is applied thereto. [Figure 10]10(a) is a cross-sectional view of a main part taken along the line XX in FIG. 9, and (b) is a cross-sectional view of a main part showing an example of a case where the laminate tape shown in (a) is attached to a motor. [Figure 11] 1(a) and 1(b) are explanatory diagrams showing Comparative Examples 1 and 2, respectively. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0028] The bathroom heating and drying device A shown in Figures 1 and 2 is configured so that a fan 2 (impeller), a motor M (fan motor) for rotating the fan 2, a heat exchanger 3 (shown only in Figure 2) as an air heating means, and a fire prevention cover 4 are incorporated within a main body case 1 that is open at the bottom.

[0029] As will be described later, bathroom heating and drying apparatus A of this embodiment is characterized by the configuration of motor M and fire spread prevention cover 4. The basic overall configuration of bathroom heating and drying apparatus A is similar to that of known apparatuses, so this will be explained briefly. That is, bathroom heating and drying device A is attached to ceiling panel 90 of the bathroom when in use, as shown in Figure 2. When fan 2 is rotated by motor M, air from the bathroom is sucked into main body case 1 through inlet 91 and heated as it passes through heat exchanger 3. This heated air passes through fan 2 and is returned to the bathroom through outlet 92. Heat exchanger 3 is capable of heating the air using hot water supplied from a water heater, for example. An opening 11 is formed in side wall 10 of main body case 1, and ventilation fan 95 is separately attached to a location corresponding to opening 11. By operating ventilation fan 95, air in the bathroom can be exhausted to the outside, thereby ventilating the bathroom.

[0030] As shown in Figs. 3 and 4, the fan 2 is, for example, a cross-flow type, and is supported by a support member 5 and set in a position extending horizontally within the main body case 1. An output shaft 66 of a motor M is connected to the fan 2 (see Figs. 6 and 7). Although not shown, the support member 5 is attached to the main body case 1 using, for example, screw fastening means. The support member 5 includes a pair of support walls 50a, 50b for rotatably supporting both ends of the fan 2, as well as a wall 51 that forms an air passage for the fan 2, and a bracket 52 for holding the motor M. The bracket 52 is, for example, in the form of a frame connected to the support wall 50a, and a fire prevention cover 4 is also attached to the bracket 52, as described later.

[0031] The motor M is itself a conventionally known motor, and as can be seen in FIG. 9(b), a rotor, a stator, bearings, etc. (not shown) are housed inside 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 C serving as lead wires is pulled out from the inside to the outside of the motor case 6.

[0032] The peripheral wall 60 of the motor case 6 includes a peripheral area around the wiring outlet 61, which is an example of a fire prevention target area according to the present invention. In contrast, in this embodiment, as shown in Fig. 9(a), laminate tape 7 (the dotted part, and dotted patterns are appropriately added in other figures) is affixed to the above-mentioned area.

[0033] As shown in Fig. 10(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. 10(b), in the attachment work to the motor case 6, the aluminum tape 70 and the aluminum glass cloth 71 can be attached simultaneously. In this embodiment, the laminate tape 7 is attached to the periphery of the wiring outlet portion 61, but instead of or in addition to this, the laminate tape 7 may be attached to other portions of the motor M.

[0034] The motor M is placed horizontally, and as shown in FIG. 5(b), the wiring outlet 61 is positioned at one end of the motor case 6 in the left-right width direction (the right end in FIG. 5(b)) and is in a specific posture facing approximately horizontally. Here, the "horizontal placement" refers to a state in which the central axis of the motor case 6 (the central axis CL shown in Figs. 3, 4, and 9) extends in a direction intersecting the up-down height direction (vertical direction). In this embodiment, the central axis CL of the motor M is set to extend in the horizontal direction. Although not shown in the drawings, the motor M is fixed in a rotation-stopped state so that the motor M does not rotate about the central axis CL and cause a shift in the position of the wiring outlet portion 61. As a fixing means, for example, a means can be used in which at least one of the protruding step portions 67, 68 (see Figs. 6 and 7) protruding from both side surfaces of the motor case 6 is clamped in an unrotatable state by both the bracket portion 52 and the main body case 1, or by a member other than these.

[0035] The fire spread prevention cover 4 is made of, for example, a flame-retardant resin, and includes a front wall 4a, left and right side walls 4b, 4c, an upper wall 4d, a rib 40, and a pair of mounting pieces 41a, 41b, as shown in Fig. 8. The flame retardant grade is, for example, 5VA of the UL94 standard. As already mentioned in the section "Means for solving the problems," flame retardancy herein means resistance to flames, delaying the time until ignition, or suppressing the amount or rate of combustion, and does not necessarily mean compliance with a specific standard, and also includes the concept of non-flammability. The front wall 4a and the side walls 4b, 4c are flat plates extending upright in the vertical height direction and are connected to each other in a U-shape in a plan cross section. The upper wall 4d is a plate connected to the upper ends of the front wall 4a and the side walls 4b, 4c so as to close the upper side of the space surrounded by the front wall 4a and the side walls 4b, 4c.

[0036] As shown in Figs. 5 to 7, the fire spread prevention cover 4 is attached to the bracket portion 52 of the support member 5 so as to stand beside the motor M and cover the wiring outlet 61. This attachment is achieved by screw fastening means using screws 98 inserted through the attachment pieces 41a, 41b. The fire spread prevention cover 4 is provided so that its front wall portion 4a is disposed relatively close to the front of the wiring outlet 61 of the motor M, and the left and right side walls 4b, 4c are located on the left and right sides of the wiring outlet 61 and its vicinity. The upper wall portion 4d is provided so as to be located above the wiring outlet 61 and its vicinity. The fire spread prevention cover 4 has an opening 49 formed in the lower part, and the wiring C is led out from the inside to the outside of the fire spread prevention cover 4 through the opening 49.

[0037] The rib 40 is provided integrally with the inner surface of the fire spread prevention cover 4 and extends uniformly in the vertical direction, for example, with an L-shaped cross section. The rib 40 corresponds to a specific example of a positioning mark for setting the motor M in the specific posture described above. More specifically, the motor M is set to be in the specific posture when the height Ha of the lower end 40a of the rib 40 is matched with the height Hb of a specific portion (for example, the lower end 61b) of the wiring outlet 61 of the motor M. Moreover, the respective members are assembled into the main body case 1 from the upper side with the main body case 1 turned upside down. The fire spread prevention cover 4 is formed to a size that extends downward by an appropriate dimension La from the lower end portion 40a of the rib 40. This is preferable in that the size of the fire spread prevention cover 4 is increased and the fire generated from the wiring outlet portion 61 is more reliably blocked.

[0038] Next, the operation of the bathroom heating / dryer A will be described.

[0039] The motor M for the fan 2 is horizontally placed, and as described with reference to Figs. 5 to 7, the wiring outlet 61 is positioned at one end of the motor case 6 in the left-right width direction and faces substantially horizontally. Therefore, even if a fire breaks out at the wiring outlet 61, the flame will have a simple shape that spreads mainly in front of and above the wiring outlet 61 without coming into much contact with the motor case 6. In contrast, the fire spread prevention cover 4 is flame retardant and covers the wiring outlet 61, so as to appropriately block the flame. Therefore, it is possible to prevent the fire from spreading.

[0040] Unlike this embodiment, for example, as shown in FIG. 11(a), when the wiring outlet 61 is located near the lower part of the motor case 6, the flames rising upward hit the motor case 6 and do not have a simple shape. It is difficult to block such a flame entirely using a fire spread prevention cover. Also, as shown in FIG. 11(b), when the wiring outlet 61 is located near the upper part of the motor case 6, it is possible to prevent the flames from hitting the motor case 6 much, but it is necessary to install a fire spread prevention cover 4' above the motor case 6, and the structure for this becomes complicated. In contrast, according to this embodiment, it is possible to avoid the above-mentioned problems, and the fire spread prevention cover 4 only needs to be installed in an upright position close to the motor M, and the installation is easy.

[0041] The fire spread prevention cover 4 is provided with a rib 40 that serves as a mark for setting the motor M to the specific position, and therefore the work of setting the motor M to the specific position can be facilitated and accelerated. Since the rib 40 is formed with an L-shaped cross section, the strength of the rib 40 can be increased, and the rib 40 is not easily damaged, even if the wiring outlet 61 abuts against the rib 40 during installation of the motor M. In addition, since the rib 40 has an L-shaped cross section, the area of ​​the end face of the rib 40 can be made large, which is advantageous in that the end face can be easily seen by the worker assembling the motor M. Since the rib 40 is integrally formed with the fire spread prevention cover 4, there is no need to paint or attach tape as a means for providing a mark on the fire spread prevention cover 4, which is convenient.

[0042] As described above, the laminate tape 7 is attached to the periphery of the wiring outlet portion 61, which corresponds to the area of ​​the motor M that is to be prevented from spreading fire. 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 glass cloth tape 71, this risk is eliminated.

[0043] The present invention is not limited to the above-described embodiment, and the specific configuration of each part of the bathroom heating and drying device according to the present invention can be freely designed and modified within the intended scope of the present invention.

[0044] The fan is not limited to a cross-flow type, and may be of other types and forms, such as a sirocco fan type. The fan may be either a so-called circulation fan or a ventilation fan. The motor is a motor that drives the fan, and the specific type (drive / control method, etc.) is not important so long as it is in the horizontal installation mode intended by the present invention. The motor is in a specific position in which the wiring outlet is located at one end of the motor case in the left / right width direction and faces approximately horizontally, but the specific mounting means, mounting position, etc. are not limited.

[0045] The fire prevention cover may be any member that has flame retardancy and covers the wiring outlet of the motor, and may be of a different shape, size, or material from the fire prevention cover of the above embodiment. The fire prevention cover may also be made of metal. The mark used to set the motor in a specific position can be configured differently from the L-shaped rib provided on the fire spread prevention cover. When configured as a rib, the cross-sectional shape can be a shape other than L, such as a T-shape or a simple rectangle. Also, the mark can be a three-dimensional shape other than a rib, such as a simple protrusion or a scale line. Furthermore, although it is preferable that the mark is provided integrally with the fire spread prevention cover, this is not limited. For example, a flame-retardant paint can be applied to certain parts of the fire spread prevention cover, or a flame-retardant tape can be attached to these parts, and these parts can be used as marks for setting the motor in a specific position.

[0046] 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.

[0047] A bathroom heating and drying device is a device that has the function of heating and drying a bathroom, and the means for heating the air in the bathroom can be heating means other than, for example, a hot water heat exchanger. [Explanation of symbols]

[0048] A Bathroom heating and drying device C Wiring (Motor) Medium motor 2 Fans 4. Fire prevention cover 4a Front wall (for fire prevention cover) 4b, 4c Side wall (for fire prevention cover) 4d Upper wall (for fire prevention cover) 40 Rib (marker) 49 Opening 6 Motor case 60 Peripheral wall section 61 Wiring outlet 7 Laminated Tape 70 Aluminum tape (metal foil tape) 71 Aluminum glass cloth (glass cloth)

Claims

1. It has a fan motor, The motor in this bathroom heating and drying device is provided with a motor case having a peripheral wall and a wiring outlet provided on the peripheral wall, and is horizontally placed so that the central axis of the motor case extends in a direction intersecting the vertical height direction, the motor is in a specific position in which the wiring outlet is located at one end of the motor case in a left-right width direction and faces a substantially horizontal direction, The wiring outlet is covered with a fire-retardant cover for preventing the spread of fire. This bathroom heating and drying device is characterized in that the fire prevention cover is provided with a mark for aligning the wiring outlet, and the motor can be set to the specific position by aligning the wiring outlet with the mark.

2. The bathroom heating and drying device according to claim 1, The fire prevention cover has wall portions located in front of, above, and on both the left and right sides of the wiring outlet portion, covering the wiring outlet portion, in the bathroom heating and drying apparatus.

3. The bathroom heating and drying device according to claim 2, A bathroom heating and drying device in which an opening is provided between the lower part of the fire prevention cover and the surrounding wall of the motor, allowing the wiring of the motor to be pulled out from the inside of the fire prevention cover to the lower outside.

4. 4. The bathroom heating and drying device according to claim 1, A bathroom heating and drying device, wherein the fire prevention cover is a resin molded product, and the mark is a three-dimensional mark molded integrally with the fire prevention cover.

5. The bathroom heating and drying device according to claim 4, In this bathroom heating and drying device, the marker is a rib that is provided on the inner surface of the fire prevention cover and extends in the vertical direction, and by matching the height of a predetermined point of the wiring outlet with the vertical end of this rib, the motor can be set to the specific position.

6. The bathroom heating and drying device according to claim 5, A bathroom heating and drying device, wherein the fire prevention cover extends downward beyond the ends of the ribs.

7. 7. The bathroom heating and drying device according to claim 1, In the bathroom heating and drying device, a laminate tape in which a 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.

Images