JP7253398B2 - bathroom air conditioner - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bathroom air conditioner that ventilates and dries a bathroom. In particular, the present invention relates to a bathroom air conditioner capable of preventing damage caused by electrical components that generate heat during operation.

Conventionally, there are bathroom ventilation dryers that ventilate the air in the bathroom to the outside, dry the inside of the bathroom, and heat the air in the bathroom and return it to the bathroom. Bathroom air conditioners such as bathroom heater-dryers that heat are known.

In this type of bathroom air conditioner, a fan, a fan motor that rotates the fan, and a heat source that heats the air taken into the main case by the fan are installed in the main case that is installed on the ceiling or wall of the bathroom. Heating means such as an exchanger, and a control board on which circuit elements for controlling the operation of the fan motor and the heating means are mounted are accommodated.

By the way, electric parts such as a fan motor supplied with a high-voltage power supply tend to heat up during operation, and there is a risk of damaging surrounding parts. For this reason, we installed a bathroom air conditioner in which the electrical components that generate heat during operation are housed in a flame-retardant resin case, and a flange made of a hot-melt material that melts when the temperature rises above a predetermined temperature. Bathroom air conditioners have been proposed in which the main body case and the flange portion are separated and the main body case is dropped into the bathroom (for example, Patent Documents 1 and 2).

JP 2014-35157 A JP 2010-121804 A

However, when the electrical components generate heat locally, the heat tends to be concentrated in a specific portion of the resin case in which the components are housed. Therefore, there is a problem that the resin case partially melts and damages peripheral parts. In bathrooms, various detergents ranging from basic detergents to acidic detergents are used, but flame-retardant resins have poor chemical resistance. From the viewpoint of the heat resistance and chemical resistance of the case that houses the electrical components, it is conceivable to use a metal case, but the metal case is inferior in moldability. Therefore, with a metal case, it is difficult to obtain a complicated shape corresponding to the outer shape of the electrical component, and the size of the case increases, resulting in an increase in the overall size of the device. In particular, due to the demand for downsizing, bathroom air conditioners are also required to have a smaller body case. must be formed into complex shapes. On the other hand, by forming a flange portion separated from the main body case by heat melting as in Patent Document 2, although damage to areas other than the bathroom air conditioner can be suppressed, damage to the parts inside the main body case cannot be prevented. However, since the main body case is dropped into the bathroom, there is a problem that the main body case falls on the user when the user is in the bathroom.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce the size of the electronic components so that damage to surrounding components can be prevented even when the electrical components housed in the main body case generate heat. To provide a suitable bathroom air conditioner.

According to the invention,
A bathroom air conditioner that ventilates and dries the inside of a bathroom,
A main body case and a resin case containing a fan motor that drives a fan, which is an electrical component that is disposed in the main body case and becomes a heat generator during operation,
A bathroom air conditioner is provided in which the resin case has a metal deposition film on the inner surface of at least a portion of the walls constituting the resin case that face the housed fan motor .

According to the bathroom air conditioner, since the fan motor is housed in the resin case, even if the fan motor has a complicated shape, the compact resin case can be arranged in the main body case. Further, when the fan motor generates heat, the temperature of a specific portion facing the heat generating portion of the fan motor first rises. Since the inner surface of at least a portion of the constituent wall facing the fan motor is provided with a metal vapor deposition film, the metal vapor deposition film having high heat conductivity can disperse heat at a specific location. As a result, it is possible to suppress an increase in the temperature of a specific portion of the resin case, thereby delaying partial melting of the resin case due to heat generation.

Preferably, in the bathroom air conditioner,
The resin case has an upper fan motor case and a lower fan motor case connected below the upper fan motor case,
The vapor-deposited metal film is formed on the inner surface of the wall facing the fan motor among the walls forming the upper fan motor case and the lower motor fan case.

According to the above bathroom air conditioner, the fan motor is housed in the resin case in which the upper fan motor case and the lower fan motor case are connected. can reduce the impact on According to the above-mentioned bathroom air conditioner, of the constituent walls constituting the upper fan motor case and the lower motor fan case, the inner surface of the constituent wall facing the fan motor is formed with a metal deposition film, so that the heat conductive property is improved. Heat can be dispersed at a specific location facing the fan motor by a high metal deposition film. As a result, it is possible to suppress an increase in the temperature of a specific portion of the resin case housing the fan motor, thereby delaying partial melting of the resin case due to heat generated by the fan motor.

Preferably, in the bathroom air conditioner,
The metal vapor deposition film consists of an aluminum vapor deposition film.

According to the above-mentioned bathroom air conditioner, it is possible to more efficiently disperse the heat of the specific portion of the resin case facing the fan motor .

Preferably, in the bathroom air conditioner,
The resin case accommodates the electrical components in a substantially airtight state so as to prevent the air flowing through the main body case from flowing into the resin case.

According to the above bathroom air conditioner, even if the fan motor catches fire, it is difficult for new air to be supplied into the resin case, and the melting of the resin case due to the fire can be delayed.

ADVANTAGE OF THE INVENTION According to this invention, the damage of the peripheral parts of the resin case in which the fan motor which is an electrical component was accommodated can be prevented, and the bathroom air conditioner suitable for size reduction can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows an example of the installation state of the bathroom heater-dryer which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic exploded perspective view of essential parts showing an example of a bathroom heater-dryer according to an embodiment of the present invention; It is a schematic perspective view which shows an example of the supporting member which concerns on embodiment of this invention.

BEST MODE FOR CARRYING OUT THE INVENTION A bathroom air conditioner according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the bathroom air conditioner according to the present embodiment is a bathroom heater/dryer 1 installed with a main body case 11 fitted to the ceiling of a bathroom 9 . The bathroom heater/dryer 1 includes a substantially rectangular box-shaped body case 11 embedded in a mounting opening 90 opened in a ceiling wall 91 of a bathroom 9, and covers an opening 110 on the lower surface of the case 11 from the bathroom 9 side. It has a lower surface cover 12 and a ventilation fan case 8 connected to one side surface of the main body case 11 . The internal space 10 of the body case 11 includes a circulation fan 21 for circulating the air in the bathroom 9 to and from the internal space 10, and a heat exchanger 14 for heating the air taken into the internal space 10 by the circulation fan 21. , and a control board 45 (see FIG. 2) on which circuit elements for controlling the operation of the bathroom heater/dryer 1 are mounted. A ventilation fan (not shown) is provided that exhausts to the outside. The bathroom heater/dryer 1 is connected via piping to a heat source such as a water heater placed outside the bathroom 9 (not shown). configured to circulate.

The body case 11 is manufactured by molding a resin such as ABS into a predetermined shape. A peripheral wall 111 of the body case 11 is composed of a front wall 11A, a rear wall 11B, and left and right side walls 11C and 11D. there is A flange 16 is formed on the outer periphery of the lower edge of the peripheral wall 111 so as to extend horizontally outward from the peripheral edge. The flange 16 is provided along the entire circumference of the lower surface of the main body case 11 , and the main body case 11 is attached to a fastening means such as a bolt nut while the upper surface of the flange 16 is in contact with the lower surface side of the outer peripheral edge of the mounting port 90 . is fixed to the ceiling wall 91 using In this specification, the outer surface of the front wall 11A is the front of the bathroom heater/dryer 1, and when the main body case 11 is viewed from the front, the depth direction is the front-rear direction, the width direction is the left-right direction, and the height direction is the direction. Up-down direction.

The circulation fan 21 consists of a line flow fan, is supported by a rotating shaft 23 of a fan motor 22 arranged on the side wall 11C, and is driven to rotate as the fan motor 22 rotates. Air in 9 is circulated.

As shown in FIG. 2 , in the internal space 10 of the main body case 11 , an upper fan case 35 having a substantially arcuate cross section that opens downward and accommodates the upper portion of the circulation fan 21 is provided in the housing area for the circulation fan 21 . It is molded integrally with the main body case 11 . Further, on the left side of the upper fan case 35 , an upper fan motor case 31 that opens downward and has a substantially arcuate cross section for housing the upper portion of the fan motor 22 is formed integrally with the main body case 11 . In this way, by integrally resin-molding a portion of the motor housing case 30 housing the fan motor 22 with the main body case 11, the device can be further miniaturized.

As shown in FIGS. 2 and 3, below the upper fan case 35 and the upper fan motor case 31, a support member 20 made of resin is attached to the main body case 11 by fastening means such as screws. The support member 20 has left and right fan support portions 25a and 25b that support the left and right ends of the circulation fan 21 from below, and the left side of the fan support portion 25a that opens upward and accommodates the lower portion of the fan motor 22. A lower fan motor case 32 having a substantially arcuate cross section is formed integrally therewith. Therefore, in the present embodiment, the upper fan motor case 31 and the lower fan motor case 32 form the motor housing case 30 that houses the fan motor 22 .

Although not shown, the upper fan motor case 31 and the lower fan motor case 32 are arranged so that when the lower fan motor case 32 is attached to the lower side of the upper fan motor case 31, the lower end peripheral portion of the upper fan motor case 31 and the lower fan motor case 31 are separated from each other. The upper edge of the case 32 contacts with the case 32 except for the rotating shaft 23 of the fan motor 22 and the insertion portion for inserting the electrical wiring, and the fan motor 22 is accommodated in a substantially sealed state. . As a result, when the circulation fan 21 is rotationally driven, the air flowing through the internal space 10 of the main body case 11 is prevented from flowing into the motor housing case 30 .

Between the fan support portion 25b of the upper fan case 35 and the side wall 11D of the main body case 11, there is formed a housing area of a certain size for housing the board housing case 40 housing the control board 45 therein. Although not shown, the heat source machine, the fan motor 22, the temperature sensor, and the like are connected to the control board 45 via electrical wiring.

The board housing case 40 contains a control board 45 and has a board case 41 having a downward opening and a cover plate 42 closing the bottom opening of the board case 41 . Although not shown, the board case 41 accommodates the control board 45 in a substantially sealed state except for an insertion portion through which electrical wiring is inserted. As a result, when the circulation fan 21 is rotationally driven, the air flowing through the internal space 10 of the main body case 11 is prevented from flowing into the board storage case 40 .

In this embodiment, the entire inner surface of the constituent walls of the upper fan motor case 31 and the lower fan motor case 32 forming the motor housing case 30 and the inner surface of the constituent walls of the substrate case 41 and the cover plate 42 forming the substrate housing case 40 A metal deposition film E is formed on the entire surface. By forming the vapor-deposited metal film E on the inner surfaces of the constituent walls of the motor housing case 30 and the board housing case 40 in this way, even if the fan motor 22 and the control board 45 generate heat during operation, the metal vapor-deposited film having high heat conductivity is formed. E can disperse the heat of a specific portion facing the heat-generating portion of these electrical components. As a result, it is possible to suppress the temperature rise in specific portions of the motor storage case 30 and the board storage case 40, and even if excessive heat is generated, partial melting of these resin cases 30 and 40 can be delayed. can. Therefore, for example, if the fan motor 22 and the control board 45 are each provided with a safety device such as a thermal fuse that melts when the temperature rises above a predetermined temperature, cracks or openings due to melting will not be formed in the motor storage case 30 and the substrate storage case 40. Therefore, it is possible to secure time for the safety device to function reliably before damage to other parts in the main body case 11 occurs.

The metal vapor deposition film E is not particularly limited, but specific examples thereof include an aluminum vapor deposition film, a gold vapor deposition film, a copper vapor deposition film, and the like, which are excellent in heat conductivity. Among these, an aluminum deposition film is preferable because it has high heat conductivity and is advantageous in terms of cost. The thickness of the metal vapor deposition film E is not particularly limited because it varies depending on the type of metal, but in the case of an aluminum vapor deposition film, it is preferably 0.1 μm or more and 10 μm or less. High heat conductivity can be obtained by forming an aluminum vapor deposition film having a thickness of 0.1 μm or more. In addition, by forming an aluminum deposition film having a thickness of 10 μm or less, film formability can be improved.

The formation area of the metal deposition film E is not particularly limited as long as it is the inner surface of the structural wall facing the fan motor 22 and the control board 45 housed in the motor housing case 30 and the board housing case 40, respectively. It is formed at least on the inner surface of the structural wall located above the motor 22 and the control board 45 . By forming the vapor-deposited metal film E on the inner surface of the structural wall positioned above the fan motor 22 and the control board 45, even if the fan motor 22 and the control board 45 ignite, the vapor-deposited metal film above these will be removed. Since E is heated first, partial melting of the resin cases 30 and 40 due to ignition can be delayed.

As long as the metal vapor deposition film E is formed on the inner surfaces of the constituent walls of the resin cases 30 and 40, the metal vapor deposition film E may be formed on the outer surfaces of the constituent walls. It may be formed so as to be continuous with the deposited metal film E. By continuously forming the vapor-deposited metal film E on the inner and outer surfaces of the resin cases 30 and 40, it is possible to further disperse the heat at specific locations facing the heat-generating locations of the electrical components.

The method of forming the metal vapor deposition film E is not particularly limited, but specifically, for example, a physical vapor deposition method such as a vacuum vapor deposition method, a sputtering method, an ion plating method, or a chemical vapor deposition method can be used. can. Among these, according to the vacuum deposition method, even for a resin molded product having a complicated shape such as the main body case 11 and the support member 20 having unevenness, the inner surface of the constituent wall forming the metal deposition film E can be formed. By masking and vapor-depositing the removed part, the metal vapor-deposited film E can be formed uniformly.

As described above, according to the present embodiment, the electrical components such as the fan motor 22 and the control board 45 that generate heat during operation are housed in the resin cases 30 and 40, which makes them more efficient than when metal cases are used. Therefore, the compact resin cases 30 and 40 can be used even for electrical components having a high degree of freedom in molding and having a complicated outer shape. In addition, according to the present embodiment, compared to the case where metal foil is attached to the inner surfaces of the constituent walls of the resin cases 30 and 40, the inner surfaces of the constituent walls of the resin cases 30 and 40 facing the electrical components have uniform gaps. Since the metal vapor deposition film E can be formed without any heat generated by the electrical component, the heat in a specific portion is quickly dispersed by the metal vapor deposition film E with high heat conductivity even if the electrical component generates heat, and the resin cases 30 and 40 are partially covered by the heat generation. Melting can be delayed. In addition, according to the present embodiment, the resin cases 30 and 40 accommodate electrical components in a substantially sealed state so as to suppress the inflow of the air flowing through the main body case 11 into the resin cases 30 and 40. Therefore, even if an electric component catches fire, it is difficult for new air to be supplied into the resin cases 30 and 40, and the melting of the resin cases 30 and 40 due to the fire can be delayed. Therefore, according to the present embodiment, before the resin cases 30 and 40 are melted, it is possible to secure time for the safety device to function, and to reliably cut off the energization of the electrical components. As a result, it is possible to prevent damage to parts around the resin cases 30 and 40 in which electrical parts are housed, and to provide a bathroom air conditioner that is highly safe and suitable for miniaturization.

(Other embodiments)
(1) In the above embodiment, an example of application to a bathroom heater/dryer as a bathroom air conditioner was explained, but the present invention can also be applied to a bathroom ventilator without a heating function and a bathroom heater/dryer with a mist function. can be applied.
(2) In the above-described embodiment, an example of applying the present invention to a resin case for housing a fan motor of a circulation fan and a control board as electrical components has been described, but the present invention can also be applied to other electrical components.

11 main body case 22 fan motor 30 motor storage case (resin case)
31 upper fan motor case 32 lower fan motor case 40 substrate storage case (resin case)
41 substrate case 42 cover plate 45 control substrate E aluminum deposition film (metal deposition film)

Claims (4)

A bathroom air conditioner that ventilates and dries the inside of a bathroom,
A main body case and a resin case containing a fan motor that drives a fan, which is an electrical component that is disposed in the main body case and becomes a heat generator during operation,
A bathroom air conditioner in which the resin case has a metal deposition film on the inner surface of at least a part of the walls constituting the resin case facing the housed fan motor . In the bathroom air conditioner according to claim 1 ,
The resin case has an upper fan motor case and a lower fan motor case connected below the upper fan motor case,
A bathroom air conditioner, wherein the vapor-deposited metal film is formed on the inner surface of the wall facing the fan motor among the walls forming the upper fan motor case and the lower motor fan case. In the bathroom air conditioner according to claim 1 or 2 ,
The metal vapor deposition film is a bathroom air conditioner made of aluminum vapor deposition film. In the bathroom air conditioner according to any one of claims 1 to 3 ,
A bathroom air conditioner in which the resin case accommodates the fan motor in a substantially sealed state so as to suppress the inflow of air flowing through the main body case into the resin case.

Images