CN112840169B

CN112840169B - Bathroom drier

Info

Publication number: CN112840169B
Application number: CN201880095773.9A
Authority: CN
Inventors: 酒井洋司; 渡边史吉; 大和秀肇; 竹居寿刚
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2022-08-30
Anticipated expiration: 2038-10-19
Also published as: TW202016478A; JP6925543B2; CN112840169A; JPWO2020079847A1; WO2020079847A1; TWI714980B

Abstract

The bathroom dryer is provided with: a blower for taking in air from the bathroom; a control substrate (9) for controlling the operation of the blower; a first control board housing section (22) for housing a control board (9); and a resin plate (10) which is provided between the inner surface of the first control board housing section (22) facing the board surface of the control board (9) and the board surface inside the control board housing section (22). The bathroom dryer can suppress malfunction due to dew condensation without complicating the manufacturing operation and increasing the weight.

Description

Bathroom drier

Technical Field

The present invention relates to a bathroom dryer which can circulate air taken in from a bathroom to a bathroom and discharge the air taken in from the bathroom to the outside of the bathroom.

Background

There are known a window-mounted type bathroom dryer which is mounted on a window of a bathroom and a wall-mounted type bathroom dryer which is mounted on a wall surface of the bathroom, and which is capable of circulating air taken in from the bathroom into the bathroom and discharging air taken in from the bathroom to the outside of the bathroom. A bathroom dryer installed in a bathroom has the following modes: a panel having an air inlet and an air outlet is exposed in the bathroom, and the main body is disposed outside the bathroom. Components of the main body, such as a blower including a fan for blowing air and a fan motor for driving the fan, a fan housing forming an air path of the fan, a heater for heating the air blown by the fan, a blow-out port for blowing out the air heated by the heater, a baffle for switching an operation mode, a motor for driving the baffle, and a control circuit for controlling operations of the blower and the bathroom dryer, are housed in the main body case.

In order to prevent the occurrence of malfunction due to water and moisture, the control circuit is housed in a dedicated housing and is housed in a main body portion disposed outside the bathroom.

The heating device for a bathroom disclosed in patent document 1 has a control device disposed in a portion of the main body adjacent to a side surface of the main body.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2007-40634

Disclosure of Invention

Problems to be solved by the invention

In a bathroom dryer installed in a bathroom, when a difference in atmospheric temperature occurs between the inside and the outside of the bathroom or when a casing housing a control circuit is cooled due to a decrease in the temperature of outside air, dew condensation occurs inside the casing housing the control circuit. In addition, dew condensation occurs outside the housing, and water may enter the housing. In order to ensure the insulation required for the control circuit and prevent malfunction of the control circuit due to water, the surface of the control circuit is generally potted with an insulating material such as potting resin.

However, when the control circuit is potted, the manufacturing work of the bathroom dryer becomes complicated, and the weight of the bathroom dryer increases. Therefore, there is a demand for a bathroom dryer having a structure capable of suppressing malfunction due to dew condensation without complicating the manufacturing operation and increasing the weight.

The present invention has been made in view of the above circumstances, and an object thereof is to obtain a bathroom dryer capable of suppressing malfunction due to dew condensation without complicating the manufacturing operation and increasing the weight.

Means for solving the problems

In order to solve the above problems and achieve the object, a bathroom dryer of the present invention includes: a blower for taking in air from the bathroom; a control substrate for controlling the operation of the blower; a control substrate receiving part for receiving a control substrate; and a resin plate provided inside the control board housing section between an inner surface of the control board housing section facing the substrate surface of the control board and the substrate surface. The resin plate is provided with ribs for separating a first surface facing the inner surface from the inner surface. The rib is provided along the outer periphery of the first surface, and is in contact with the inner surface of the control board housing section, which is opposite to the side surface of the resin plate, inside the control board housing section.

Effects of the invention

The bathroom dryer of the invention has the following effects: malfunction due to condensation can be suppressed without complicating the manufacturing operation and increasing the weight.

Drawings

Fig. 1 is a perspective view showing a bathroom dryer according to embodiment 1 of the present invention.

Fig. 2 is a perspective view of the bathroom dryer shown in fig. 1 as viewed from the back side.

Fig. 3 is a perspective view showing an internal structure of a main body of the bathroom dryer shown in fig. 1.

Fig. 4 is a side view showing an installation state of the bathroom dryer shown in fig. 1.

Fig. 5 is an exploded perspective view showing a first control board housing part of the bathroom dryer shown in fig. 1.

Fig. 6 is a perspective view of the resin plate of the bathroom dryer shown in fig. 1, as viewed from the first surface side.

Fig. 7 is a perspective view of the resin plate of the bathroom dryer shown in fig. 1, as viewed from the second surface side.

Fig. 8 is a cross-sectional view of a main portion showing an internal structure of the first control board housing section of the bathroom dryer shown in fig. 1, and is a cross-sectional view taken along line VIII-VIII in fig. 2.

Detailed Description

Hereinafter, a bathroom dryer according to an embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiment. In the drawings shown below, the scale of each member may be different from the actual scale for easy understanding. The same applies between the figures.

Embodiment mode 1

Fig. 1 is a perspective view showing a bathroom dryer 100 according to embodiment 1 of the present invention. Fig. 2 is a perspective view of the bathroom dryer 100 shown in fig. 1 as viewed from the back side, and is a perspective view showing a state in which the outer shell housing 1 is removed. Fig. 3 is a perspective view showing an internal structure of the main body 21 of the bathroom dryer 100 shown in fig. 1. In fig. 1, the lower right direction is the front side of the bathroom dryer 100, and the upper left direction is the rear side of the bathroom dryer 100. In fig. 1 to 3, the lower side in the drawings is the lower side in the vertical direction in the mounted state of the bathroom dryer 100.

The bathroom dryer 100 of embodiment 1 is a window-mounted type bathroom dryer that can be mounted on a window of a bathroom. The bathroom dryer 100 can also be used as a wall-mounted type bathroom dryer 100 that can be mounted on a wall surface of a bathroom. The bathroom dryer 100 is capable of performing a heating operation for blowing warm air into a bathroom, a ventilating operation for ventilating air discharged out of the bathroom to the outside, and a drying operation for simultaneously blowing warm air into the bathroom and discharging air from the bathroom.

The bathroom dryer 100 of embodiment 1 includes: a panel 2 exposed in the bathroom to form an appearance surface; and a rectangular parallelepiped main body 21 covered with a box-shaped metal case. The panel 2 is configured to have: a flat panel base 3 attached to a window in a bathroom; and a flat front panel 4 disposed on the inner side of the bathroom than the panel base 3. In embodiment 1, the outer shape of the panel base 3 and the front panel 4 in the in-plane direction is a quadrilateral shape. The air outlet 5 provided in the front panel 4 constitutes a circulation air outlet for blowing warm air.

The front panel 4 is disposed away from the panel base 3. The front panel 4 can be opened without using a tool by rotating the panel knob to remove an engaging portion, not shown, between the front panel 4 and the panel base 3. A gap for sucking air in the bathroom is provided between the panel base 3 and the front panel 4. The bathroom dryer 100 sucks air in the bathroom from 3 directions, i.e., the upper surface side of the panel 2 and the left and right side surfaces of the panel 2.

As shown in fig. 2 and 3, the main body 21 includes a main body 13 covered by an outer shell housing 1 constituting an outer shell of the bathroom dryer 100, and a first control board housing 22. The main body 13 includes a fan 16 for blowing air and a fan motor 17 for driving the fan 16. The fan motor 17 and the fan 16 constitute a blower 20. In fig. 3, the fan motor 17 is shown as a part of the shaft in terms of the direction. In addition to the blower 20, a fan housing forming an air passage for the airflow generated by the fan 16, a heater for heating the air blown by the fan, a blow-out port for blowing out the air heated by the heater, a shutter for switching the air passage for the airflow generated by the fan 16, and a motor for driving the shutter are housed in the main body 21.

Inside the main body case 13 are formed: an air passage formed by the main body 13 and the fan casing and configured to guide the air blown by the fan 16 to the air outlet 5; and an air passage formed by the main body 13 and the fan casing and configured to guide the air blown by the fan 16 to an unillustrated air outlet.

The first control board housing portion 22 houses a control circuit that controls the operation of the blower 20 and the damper and controls the operation of the bathroom dryer 100. The control circuit is composed of an electronic circuit in which a plurality of electronic components are mounted on the control board 9. The first control board housing 22 is fixed to a side surface of the main body 13 inside the outer shell 1.

Fig. 4 is a side view showing an installation state of the bathroom dryer 100 shown in fig. 1. As shown in fig. 4, the bathroom dryer 100 is attached by fixing an aluminum plate 41 provided with an opening having the same size as the outer shell case 1 to a window frame 42 of a window and pressing the main body 21 into the opening of the plate 41 from the bathroom side. In fig. 4, the lower side in the drawing is the lower side in the vertical direction.

Fig. 5 is an exploded perspective view of the first control board housing section 22 of the bathroom dryer 100 shown in fig. 1. Fig. 6 is a perspective view of the resin plate 10 of the bathroom dryer 100 shown in fig. 1, as viewed from the first surface 10e side. Fig. 7 is a perspective view of the resin plate 10 of the bathroom dryer 100 shown in fig. 1, as viewed from the second surface 10f side. Fig. 8 is a main part sectional view showing an internal structure of the first control board housing section 22 of the bathroom dryer 100 shown in fig. 1, and is a cross-sectional view taken along line VIII-VIII in fig. 2. In fig. 5, the lower side in the drawing is the lower side in the vertical direction in the mounted state of the bathroom dryer 100. In fig. 6, the right side in the figure is the lower side in the vertical direction in the mounted state of the bathroom dryer 100. In fig. 7, the left side in the figure is the lower side in the vertical direction in the mounted state of the bathroom dryer 100.

The control board 9 is housed in the first control board housing section 22 in a state of being housed in the second control board housing section 23. The first control board housing 22 is a metal control board housing for housing the control board 9, which is formed by screwing and fixing a box-shaped metal plate cover 12 having an opening on one surface to the metal plate base 7. The first control board housing portion 22 is fixed to the main body case 13 by screws. The second control board housing 23 is a resin control board housing configured by fitting and fixing the resin plate 10 to the box-shaped resin case 8 having one open surface, and houses the control board 9.

The control board 9 is fixed to the resin case 8 by screws. The resin case 8 is fixed to the metal plate base 7 by screws. On the resin plate 10, fixing claws 10a for fixing the resin case 8 are provided at 2 locations facing each other. In the resin case 8, fixing holes 8a into which the fixing claws 10a of the resin plate 10 are hooked are provided at 2 locations corresponding to the fixing claws 10 a. Then, the fixing claws 10a of the resin plate 10 are fitted into the fixing holes 8a of the resin case 8, whereby the resin plate 10 is fixed to the resin case 8.

The control board 9 is housed in a second control board housing section 23, which is a resin control board housing section, in a state where a mounting surface 9a, which is a substrate surface of the control board 9 on which a plurality of electronic components are mounted, is opposed to the resin board 10. The resin plate 10 is provided between the inner surface 12a of the metal plate cover 12 facing the mounting surface 9a of the control board 9 and the mounting surface 9a of the control board 9 in the first control board housing 22, which is a metal control board housing. The inner surface 12a of the sheet metal cover 12 facing the mounting surface 9a of the control board 9 is an inner surface 22a of the first control board housing 22 facing the mounting surface 9a of the control board 9. The inner surface 12a of the sheet metal cover 12 is an inner surface of a surface of the first control board housing 22 on a side not adjacent to the main body housing 13, and is an inner surface of a surface of the first control board housing 22 on which the substrate surface of the control board 9 faces, the outer surface of which is exposed.

Inside the first control board housing section 22, the resin plate 10 provided on the inner surface 12a side of the metal plate cover 12 of the control board 9 functions as a heat insulating layer between the inner surface 12a of the metal plate cover 12 and the control board 9. That is, in the bathroom dryer 100, the resin plate 10 is provided, so that the cooling of the periphery of the control board 9 in the first control board housing section 22 is suppressed. Therefore, the bathroom dryer 100 can suppress the occurrence of dew condensation around the control board 9 in the first control board housing 22, such as when a difference in ambient temperature between the inside and the outside of the bathroom occurs, or when the first control board housing 22 is cooled due to a decrease in the temperature of the outside air caused by rainfall, by providing the resin plate 10.

The first surface 10e of the resin plate 10 is a surface of the resin plate 10 on a side facing the inner surface 22a of the first control board housing portion 22. The second surface 10f of the resin plate 10 is a surface of the resin plate 10 facing the opposite side to the side facing the first surface 10 e.

As shown in fig. 6, on the first surface 10e of the resin plate 10, a clearance rib 10b as a first rib for separating the inner surface 12a of the metal plate cover 12 from the first surface 10e of the resin plate 10 is provided along the outer periphery of the first surface 10 e. When the resin plate 10 is accommodated in the first control board accommodating portion 22, the gap rib 10b comes into contact with the inner surface 12a of the metal plate cover 12, thereby forming the air layer 18 between the inner surface 12a of the metal plate cover 12 and the first surface 10e of the resin plate 10.

The air layer 18 formed between the inner surface 12a of the sheet metal cover 12 and the first surface 10e of the resin plate 10 functions as a heat insulating layer between the inner surface 12a of the sheet metal cover 12 and the resin plate 10. That is, the air layer 18 functions as a heat insulating layer between the inner surface 12a of the sheet metal cover 12 and the control board 9. Therefore, the bathroom dryer 100 can suppress the occurrence of dew condensation around the control board 9 in the first control board housing 22, such as when a difference in ambient temperature between the inside and the outside of the bathroom occurs, or when the first control board housing 22 is cooled due to a decrease in the temperature of the outside air caused by rainfall, by providing the air layer 18.

As shown in fig. 6, a first notch 10d for drainage is provided in the gap rib 10b at a portion located on the lower side in the vertical direction in the mounted state of the bathroom dryer 100. Further, a second notch 12b for drainage is provided in the metal plate cover 12 at a position corresponding to the first notch 10d for drainage of the clearance rib 10b in a portion located on the lower side in the vertical direction in the attached state of the bathroom dryer 100.

Further, by providing the first water drainage notch 10d in the clearance rib 10b and providing the second water drainage notch 12b in the sheet metal cover 12, the air layer 18 between the inner surface 12a of the sheet metal cover 12 and the first surface 10e of the resin plate 10 communicates with the outside of the first control board housing section 22. Therefore, even when dew condensation occurs in the air layer 18 between the inner surface 12a of the sheet metal cover 12 and the first surface 10e of the resin plate 10, dew condensation water adhering to the resin plate 10 and the surface of the sheet metal cover 12 on the air layer 18 side moves downward in the vertical direction due to gravity and is discharged through the first drainage notch 10d and the second drainage notch 12 b. Thus, the bathroom dryer 100 can eliminate the influence of moisture generated by condensation between the inner surface 12a of the metal plate cover 12 and the first surface 10e of the resin plate 10 on the control board 9.

Further, the electronic components such as the stepping motor 14 disposed below the first control board housing portion 22 are covered with the cover 19. Therefore, the dew condensation water discharged from the air layer 18 does not drip on the electronic components such as the stepping motor 14.

As shown in fig. 8, the clearance rib 10b is in contact with the inner surface 12c of the metal plate cover 12 facing the side surface 10g of the resin plate 10 in the first control board housing 22. The side surface 10g of the resin plate 10 is in contact with the inner side surface 12c of the opposing metal plate cover 12. Thus, in the bathroom dryer 100, the contact area between the resin plate 10 and the metal plate cover 12 can be increased, and the penetration of moisture from the air layer 18 between the inner surface 12a of the metal plate cover 12 and the first surface 10e of the resin plate 10 toward the control board 9 can be prevented.

The height and width of the clearance rib 10b are not particularly limited as long as the above-described effects can be obtained.

As shown in fig. 7 and 8, a second rib, i.e., a water intrusion prevention rib 10c for preventing water from intruding into the second control board housing section 23 is provided on the second surface 10f of the resin board 10 along the outer periphery of the second surface 10 f. An opening end surface 8c, which is an end surface on the opening side of the resin case 8, has a stepped shape along a region on the outer peripheral side of the second surface 10f of the resin plate 10. Thus, the opening end face 8c, which is the end face on the opening side of the resin case 8, and the outer peripheral edge portion 10h, which is the outer peripheral edge portion on the outer peripheral side of the water intrusion prevention rib 10c, of the second surface 10f of the resin plate 10, the side face on the outer peripheral side of the resin plate 10 of the water intrusion prevention rib 10c, and the upper surface of the water intrusion prevention rib 10c are in contact.

Thus, in the bathroom dryer 100, the contact area between the resin case 8 and the resin plate 10 can be increased, and the second control board housing 23 can be prevented from being immersed in water.

As shown in fig. 5, in the resin case 8, a U-shaped groove 8b having a U-shape for externally leading out a lead wire, not shown, led out from the control board 9 is provided in a portion located on the lower side in the vertical direction in the mounted state of the bathroom dryer 100. A flexible cord cover 11 made of resin through which a not-shown lead wire drawn out from the control board 9 passes is fitted in the U-shaped groove 8 b. As shown in fig. 7, a contact portion 10i, with which an end face of the cord cover 11 is brought into contact, is provided on the resin plate 10 at a portion located on the lower side in the vertical direction in the mounted state of the bathroom dryer 100. The cord cover 11 is fixed in a state of being surrounded by the U-shaped groove 8b of the resin case 8 and the contact portion 10i of the resin plate 10. The lead wire drawn out from the control board 9 is fixed by passing through the flexible wire cover 11, and is drawn out downward from the second control board housing 23.

This can prevent water from entering the second control board housing 23 due to the lead wire drawn out from the control board 9 being drawn out from the second control board housing 23, and can draw out the lead wire to the outside of the second control board housing 23. That is, the second control board housing 23 is configured to insulate the control board 9 from the outside by the resin case 8 and the resin plate 10, and further to cover the lead wire drawn out from the control board 9 with the cord cover 11, thereby providing a barrier structure for insulating the lead wire from the outside and preventing water from entering the second control board housing 23. The second control board housing portion 23 is closed by blocking communication between the inside and the outside.

As described above, in the bathroom dryer 100 according to embodiment 1, the resin plate 10 provided between the inner surface 12a of the metal plate cover 12 and the control board 9 functions as a heat insulating layer between the inner surface 12a of the metal plate cover 12 and the control board 9. In the bathroom dryer 100, the air layer 18 formed between the inner surface 12a of the sheet metal cover 12 and the first surface 10e of the resin plate 10 functions as a heat insulating layer between the inner surface 12a of the sheet metal cover 12 and the resin plate 10. This suppresses the cooling of the periphery of the control board 9 in the first control board housing section 22 in the bathroom dryer 100.

Thus, the bathroom dryer 100 can prevent malfunction of the control circuit mounted on the control board 9 due to dew condensation occurring around the control board 9, and can realize the bathroom dryer 100 with high reliability. Further, since the bathroom dryer 100 can secure the insulation necessary for the control circuit without potting the control circuit, the manufacturing operation is not complicated, and the weight of the bathroom dryer 100 is not increased.

Therefore, the bathroom dryer 100 according to embodiment 1 exhibits an effect of being able to suppress malfunction due to condensation without complicating the manufacturing operation and increasing the weight.

The configuration described in the above embodiment is an example of the contents of the present invention, and may be combined with other known techniques, and a part of the configuration may be omitted or modified within a range not departing from the gist of the present invention.

Description of the reference numerals

1 outer contour casing, 2 panel, 3 panel base, 4 front panel, 5 blow-out port, 7 metal plate base, 8 resin casing, 8a fixing hole, 8b U groove, 8c opening end face, 9 control substrate, 9a mounting face, 10 resin plate, 10a fixing claw, 10b gap rib, 10c water immersion preventing rib, 10d drainage first notch, 10e first face, 10f second face, 10g side face, 10h outer peripheral edge, 10i contact part, 11 flexible wire sleeve, 12 metal plate cover, 12a, 22a inner face, 12b drainage second notch, 12c inner face, 13 body, 14 stepping motor, 16 fan, 17 fan motor, 18 air layer, 19 cover, 20 blower, 21 body, 22 first control substrate storage, 23 second control substrate storage, 41 plate, 42 window frame, 100 bathroom dryer.

Claims

1. A bathroom dryer, which is characterized in that,

the bathroom dryer includes:

a blower for taking in air from the bathroom;

a control substrate for controlling the operation of the blower;

a control board storage unit that stores the control board; and

a resin plate provided between an inner surface of the control board housing section facing a board surface of the control board and the board surface inside the control board housing section,

the resin plate includes a first surface facing an inner surface of the control board housing portion, and a rib provided along an outer periphery of the first surface to separate the inner surface from the first surface,

the rib is in contact with the inner side surface of the control board accommodating part opposite to the side surface of the resin plate in the control board accommodating part,

the side surface of the resin plate is in contact with the inner side surface of the control board accommodating part facing the resin plate,

an air layer is provided between the inner surface and the resin plate.

2. The bathroom dryer of claim 1,

the rib has a first notch for draining water at a part located at the lower side in the vertical direction in the installation state of the bathroom dryer,

the control board housing portion has a second notch for draining water in a portion corresponding to the first notch for draining water in the installation state of the bathroom dryer.