WO2020079846A1

WO2020079846A1 - Bathroom dryer

Info

Publication number: WO2020079846A1
Application number: PCT/JP2018/039087
Authority: WO
Inventors: 史吉渡邉; 康之糸魚川; 洋司酒井; 秀肇大和; 一郎本木; 寿剛竹居; 宏幸諏訪
Original assignee: 三菱電機株式会社
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2020-04-23
Also published as: CN113056646A; TWI714981B; TW202016474A; CN113056646B; JP6929472B2; JPWO2020079846A1

Abstract

This bathroom dryer comprises: a fan motor in which first drain holes (11g, 11h) are formed in the outer shell; a fan that is driven by the fan motor; a heater that warms air blown by the fan; a body that has a box shape in which an opening is formed on one side and that accommodates the fan motor, the fan, and the heater; a panel that has a filter to remove foreign matter in the air taken in by the fan and that is mounted to the body so as to be able to open and close the opening; and a motor cover (36) that covers the first drain holes (11g, 11h) by being attached to the outer shell with a screw. The motor cover (36) has a drain receiving section to receive drain water discharged from the fan motor through the first drain holes (11g, 11h); second drain holes (36j, 36n) to discharge drain water are formed in the drain receiving section; the first drain holes (11g, 11h) and the second drain holes (36j, 36n) do not overlap in a direction in which the second drain holes (36j, 36n) are viewed from the front.

Description

Bathroom Dryer

The present invention has a heating operation for blowing warm air to the bathroom, a ventilation operation for discharging the air in the bathroom to the outside, and a drying operation for simultaneously blowing hot air to the bathroom and discharging the air in the bathroom. Regarding a bathroom dryer that switches the air passage.

The bathroom dryer houses a fan, fan motor, and heater in a box-shaped main body with an opening formed on one surface. The opening surface of the main body is covered with a panel provided with a filter for removing foreign matter in the air taken into the fan. When the bathroom dryer is operated in a high humidity state in the bathroom, the atmosphere around the fan motor in the air passage also becomes high in humidity, and moisture enters the inside of the fan motor.

When moisture enters the inside of the fan motor, the inner surface of the outer contour of the fan motor condenses and drain water collects at the bottom. In order to discharge this drain water, it is common to provide a drain hole in the side surface of the outer contour of the fan motor as shown in Patent Document 1 for draining.

JP, 2005-173535, A

Bathroom dryers that allow the panel to be opened without the use of tools to clean the filter may be directly splashed with water on the fan motor. Even when a drain hole is provided in the outer contour of the fan motor to allow the water inside the fan motor to be discharged, it is necessary to prevent water from entering the inside of the fan motor from the outside through the drain hole as much as possible. For this reason, a bathroom dryer using a fan motor having a drain hole on the side surface of the motor casing as in Patent Document 1 requires waterproof performance to prevent water from entering the fan motor even when the panel is open. is there. Therefore, even if water splashes on the outer contour of the fan motor, water must not enter the inside of the fan motor through the drain hole, and the drain water generated by dew condensation inside the fan motor must be drained from the drain hole. I have to.

The present invention has been made in view of the above, and a bathroom dryer capable of draining drain water generated inside a fan motor to the outside while preventing water from entering the inside of the fan motor from the outside. The purpose is to get.

In order to solve the above-mentioned problems and achieve the object, the present invention provides a fan motor having a first drain hole formed in an outer shell, a fan rotationally driven by the fan motor, and air blown by the fan. It has a heater that warms up, a box shape with an opening formed on one surface, a main body that houses the fan motor, fan and heater, and a filter that removes foreign matter in the air taken into the fan, and the opening can be opened and closed A panel attached to the main body, and a motor cover attached to the outer shell with a screw to cover the first drain hole. The motor cover has a drain receiving portion that receives drain water discharged from the fan motor through the first drain hole. The drain receiver has a second drain hole for draining drain water. The first drain hole and the second drain hole do not overlap each other in the direction in which the second drain hole is viewed from the front.

The bathroom dryer according to the present invention has an effect that drain water generated inside the fan motor can be discharged to the outside while preventing water from entering the inside of the fan motor.

The perspective view which shows the installation state of the bathroom dryer which concerns on Embodiment 1 of this invention. FIG. 3 is a vertical cross-sectional view showing the internal structure of the main body of the bathroom dryer according to Embodiment 1. Front view of the bathroom dryer according to the first embodiment with a front panel removed Front view of the bathroom dryer according to the first embodiment with a front panel and a filter removed The perspective view of the bathroom dryer according to the first embodiment with the panel, the filter and the fan casing removed. The perspective view of the bathroom dryer according to the first embodiment with the panel, the filter, the fan casing, and the fan removed. The perspective view of the surface side of the motor cover of the bathroom dryer which concerns on Embodiment 1. The perspective view of the back side of the motor cover of the bathroom dryer which concerns on Embodiment 1. The top view of the motor cover of the bathroom dryer which concerns on Embodiment 1. Sectional drawing of the motor cover of the bathroom dryer which concerns on Embodiment 1. 1 is a perspective view of a fan motor, a fixing plate, and a fan of a bathroom dryer according to a first embodiment. The exploded perspective view of the fan motor, the fixing plate, and the motor cover of the bathroom dryer according to the first embodiment.

A bathroom dryer according to an embodiment of the present invention will be described below in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
1 is a perspective view showing an installed state of a bathroom dryer according to Embodiment 1 of the present invention. The bathroom dryer 1 has a panel 2 forming a design surface on the inside surface of the bathroom, and a main body 20 covered with a box-shaped metal case. The panel 2 includes a panel base 3 and a front panel 4. The panel 2 draws in air from above and between the panel base 3 and the front panel 4 in three directions. The front panel 4 can be opened by rotating the panel knob 5 to disengage the engaging portion between the front panel 4 and the panel base 3. It should be noted that the engaging portion between the front panel 4 and the panel base 3 is not shown.

The air outlet 10 forms an outlet on the front panel 4 for blowing out warm air.

FIG. 2 is a vertical cross-sectional view showing the internal structure of the main body of the bathroom dryer according to the first embodiment. The main body 20 includes an outer frame 21 that forms an outer shell, a fan 22 that blows air, a fan motor 11 that drives the fan 22, a resin main body 7 that forms an air passage for the air flow generated by the fan 22, and a fan that blows air. And a casing 23. The main body 7 has a box shape with an opening formed on one surface. The surface of the main body 7 in which the opening is formed is covered with the panel 2. In FIG. 2, the fan motor 11 is hidden behind the fan 22, and only the motor shaft 11d is shown in the figure. Further, in the main body 20, a heater 24 that warms the air blown by the fan 22, a blowout port 10 that blows out the warmed air, a damper 25 that switches operation modes of ventilation, heating, and drying, a motor that drives the damper 25, An exhaust opening 21a for discharging the air is housed.

The bathroom dryer 1 drives the damper 25 to switch the air passage to discharge air from the exhaust opening 21a to the outside, a heating operation in which heated air is blown into the bathroom from the outlet 10, or a bathroom operation. A part of the air is discharged to the outside through the exhaust opening 21a, a part of the air is warmed, and a drying operation for returning to the bathroom is performed.

Also, the air sucked from between the panel base 3 and the front panel 4 flows through the air passage after passing through the filter 6. The filter 6 removes foreign matter in the air taken into the fan 22.

FIG. 3 is a front view of the bathroom dryer according to the first embodiment with the front panel open. By turning the panel knob 5 attached to the panel base 3 sideways and removing the hook portion 4a provided at the lower portion of the front panel 4, the front panel 4 is centered on the engaging portion with the panel base 3 at the upper portion of the front panel 4. Can be rotated upward to open the front panel 4. The filter 6 is attached to the panel base 3. Even when the front panel 4 is closed, the filter 6 can be removed from the panel base right side 3a side by holding the filter right handle 6a or can be removed from the panel base left side 3b side by holding the filter left handle 6b. . Further, when the front panel 4 is open, the filter 6 can be removed forward by holding the filter front handle 6c. In this way, the filter 6 can be removed from a plurality of directions. For this reason, the filter 6 can be removed even if there is a wall on either the left or right side of the main body 20 of the bathroom dryer 1, thereby eliminating the installation restriction of the bathroom dryer 1 and improving maintainability.

FIG. 4 is a front view of the bathroom dryer according to the first embodiment with the front panel open and the filter removed. The front panel 4 and the filter 6 can be removed without the use of tools. The fan 22 shown in FIG. 2, which blows air, the fan motor 11 that drives the fan 22, the motor fixing plate 12 that holds the fan motor 11, and the fan that forms the air passage of the fan 22 in the opening where the filter 6 is removed. A casing 23 is installed. The fan 22 includes an air suction portion 8a between the fan casing 23 and a protruding portion 7a of the main body 7 that houses a product drive circuit (not shown), and an air suction portion 8b between the fan casing 23 and the fan motor 11. Inhales air and blows it.

FIG. 5 is a perspective view of the bathroom dryer according to the first embodiment with the panel, filter, and fan casing removed. FIG. 6 is a perspective view of the bathroom dryer according to the first embodiment with the panel, filter, fan casing, and fan removed. A motor fixing plate 12 is attached to the main body 7. The fan motor 11 is attached to the motor fixing plate 12. A fan 22 is attached to the motor shaft 11d of the fan motor 11. The fan 22 is attached to the motor shaft 11d of the fan motor 11 in a posture in which the rotation axis faces the lateral direction. The fan 22 is a double suction blade that sucks air from both the

air suction portions

8a and 8b.

The motor frame 11a and the motor bracket 11b are provided with a flange portion 11c on their mating surfaces. The flange part 11c is provided with a plurality of convex screw tightening parts 11e having holes through which the screws 15 can pass. The screw tightening portion 11e is fixed to the motor fixing plate 12. The fan 22 is fixed to the metal motor shaft 11d by the metal nut 13.

Adhesive is applied to the entire circumference of the flange 11c. The lead wire penetration portion is closed by a resin bush 34. Further, the bearing on the side of the motor frame 11a is of a seal type. In the bathroom dryer 1 according to the first embodiment, the infiltration of moisture into the inside of the fan motor 11 is prevented by these measures for preventing infiltration of moisture.

FIG. 7 is a perspective view of the front surface side of the motor cover of the bathroom dryer according to the first embodiment. FIG. 8 is a perspective view of the back surface side of the motor cover of the bathroom dryer according to the first embodiment. FIG. 9 is a plan view of the motor cover of the bathroom dryer according to the first embodiment. FIG. 10 is a cross-sectional view of the motor cover of the bathroom dryer according to the first embodiment. FIG. 10 shows a cross section taken along line XX in FIG. The motor cover 36 has a shape having a longitudinal direction and a lateral direction. In the first embodiment, the motor cover 36 has a rectangular parallelepiped shape. A first concave portion and a second concave portion are formed on the surface 36q of the motor cover 36. The first recess is a slide groove 36c reaching the side surface 36u extending in the longitudinal direction. The second concave portion is constituted by the screw fixing groove 36d and the U groove 36f, and reaches the side surface 36r on the one end side in the longitudinal direction. The first recess and the second recess are connected by a U groove 36p. The U groove 36p is a narrowed portion that is narrower than the head of the screw 15.

An insertion hole 36e is formed at the end of the first recess on the side of the U groove 36p. The side wall of the end of the first recess on the U groove 36p side is a slope 36a that overhangs the insertion hole 36e in an eaves shape.

Also, on the surface 36q, a second drain hole 36n is provided on the side opposite to the side adjacent to the U groove 36p of the first recess. Further, the surface 36q is provided with a second drain hole 36j adjacent to the second recess in the width direction.

The back surface 36s of the motor cover 36 is open, and concave

drain receiving portions

36m and 36k whose bottom is the front surface 36q are formed. The side surfaces 36r and 36t extending in the lateral direction of the motor cover 36, that is, the back surface 36s side of the

side surfaces

36r and 36t at both ends in the longitudinal direction are curved and recessed with the same curvature as the outer diameter of the fan motor 11.

FIG. 11 is a perspective view of a fan motor, a fixing plate and a fan of the bathroom dryer according to the first embodiment. FIG. 12 is an exploded perspective view of the fan motor, the fixing plate, and the motor cover of the bathroom dryer according to the first embodiment. The slide groove 36c extends in a direction intersecting the extending direction of the U groove 36f and reaches the end of the motor cover 36, and the screw fixing portion 12a is slidable. The motor cover 36 is attached to the lower part of the fan motor 11 when the bathroom dryer 1 is installed. The motor cover 36 is fixed to the outer contour of the fan motor 11 with the back surface 36s side facing the outer contour of the fan motor 11. Specifically, the flange portion 11c is inserted into the flange groove 36g, the screw tightening portion 11e protruding from the flange portion 11c is inserted into the insertion hole 36e of the motor cover 36, and the slope 36a and the outer shape of the screw tightening portion 11e. Are brought into contact with each other, and the screw tightening portion 11e is fitted into the insertion hole 36e. Further, the shaft 11f of the screw tightening portion 11e and the shaft 36b of the motor cover 36 are aligned with each other. With the shaft 11f of the screw tightening portion 11e and the shaft 36b of the motor cover 36 aligned with each other, the motor frame 11a is passed through the through hole 12c of the motor fixing plate 12, and is rotated in the circumferential direction of the fan motor 11 to form the through hole 12c. The screw fixing portion 12a protruding in the center direction is slid through the slide groove 36c so that the shaft 11f of the screw tightening portion 11e and the shaft 12b of the screw fixing portion 12a are aligned with each other. Since the slide groove 36c reaches the end of the motor cover 36, the screw fixing portion 12a can be inserted into and removed from the slide groove 36c with the motor cover 36 positioned in the outer contour of the fan motor 11. Then, the screw 15 is inserted from the screw fixing groove 36d of the motor cover 36 into the U groove 36p which is a narrow portion for screw fixing, and the motor cover 36 is fixed to the motor fixing plate 12 together with the fan motor 11. Specifically, the screw tightening portion 11e penetrating the insertion hole 36e and the U groove 36p of the motor cover 36 are fastened together with the screw fixing portion 12a with the screw 15. Since the U groove 36f is formed on the motor cover 36 along the shaft 36b, the handle of the driver is prevented from interfering with the motor cover 36 when the screw 15 is tightened.

-The bathroom dryer 1 must have waterproof performance equivalent to IPX4, which is a splash-proof type in the waterproof grade of the International Electrotechnical Commission (IEC). In the bathroom dryer 1, since the motor cover 36 and the side surfaces of the fan motor 11 and the flange portion 11c and the flange groove 36g of the motor cover 36 are in contact with each other or have only a minute gap, the motor is not affected by water. Water does not enter the inside of the motor cover 36 from between the cover 36 and the side surface of the fan motor 11. The

second drain holes

36j and 36n of the motor cover 36 are arranged at positions displaced from the first drain hole 11g of the motor bracket 11b and the first drain hole 11h of the motor frame 11a. Therefore, when viewed from the direction in which the second drain hole 36j is viewed from the front, the second drain hole 36j and the first drain hole 11g do not overlap with each other. Similarly, when viewed from the direction in which the second drain hole 36n is viewed from the front, the second drain hole 36n and the first drain hole 11h do not overlap each other. As described above, the

second drain holes

36j and 36n of the motor cover 36 do not overlap with the first drain hole 11g of the motor bracket 11b and the first drain hole 11h of the motor frame 11a. The motor cover 36

shields

11h and 11g. Therefore, although water may infiltrate into the motor cover 36 due to water splashing, water does not intrude into the fan motor 11. In particular, water from the outside is likely to splash on the motor bracket 11b side, but the projection 36h formed by the screw fixing groove 36d and the plate thickness of the U groove 36f allows the motor bracket 11b to pass through the second drain hole 36j of the motor cover 36. The path through which water splashes is cut off linearly up to the first drain hole 11g.

When drain water is generated inside the fan motor 11 due to dew condensation, the drain water that has dropped from the first drain hole 11g to the drain receiving portion 36k of the motor cover 36 on the side of the motor bracket 11b is the drain water of the motor cover 36 at two locations. The water is drained through the second drain hole 36j. On the side of the motor frame 11a, the drain water that has dropped from the first drain hole 11h to the drain receiving portion 36m of the motor cover 36 is drained through the second drain hole 36n of the motor cover 36. The

second drain holes

36j and 36n of the motor cover 36 are sized so that water does not collect due to surface tension. Specifically, the size of the

second drain holes

36j, 36n is such that the surface tension of the water film formed by the drain water in the

second drain holes

36j, 36n is weaker than the gravity acting on the water film. It is large. If the size of the

second drain holes

36j, 36n satisfies this condition, water does not accumulate in the

drain receiving portions

36k, 36m, and the water film formed by the drain water in the

second drain holes

36j, 36n is formed. Even if the drain water is not pushed from above, the drain water does not stay in the

second drain holes

36j and 36n.

In the bathroom dryer 1 according to the first embodiment, the motor cover 36 is fixed to the fan motor 11 with the screws 15 to shield the

first drain holes

11h and 11g. Water can be prevented from entering. Further, the motor cover 36 is provided with

drain receiving portions

36k, 36m for receiving the drain water drained from the inside of the fan motor 11, in front of the

first drain holes

11h, 11g, and the

drain receiving portions

36k, 36m are provided with Since the two

drain holes

36j and 36n are provided, the drain water generated inside the fan motor 11 can be drained to the outside of the fan motor 11.

In particular, when the bathroom dryer is a wall-mounted type or a window-mounted type, it will be installed at a lower place than when it is installed on the ceiling, so there is a high possibility that water will be directly applied to the fan motor. Therefore, it is necessary for the bathroom dryer installed on the wall or the window to surely take measures to prevent water from entering the inside of the fan motor from the outside. Since the bathroom dryer 1 according to the first embodiment can prevent water from entering the inside of the fan motor 11 from the outside, it can be installed at a position lower than the ceiling.

The configurations shown in the above embodiments show an example of the content of the present invention, and can be combined with other known techniques, and the configurations of the configurations are possible without departing from the gist of the present invention. It is also possible to omit or change parts.

1 bathroom dryer, 2 panel, 3 panel base, 3a panel base right side, 3b panel base left side, 4 front panel, 4a hook, 5 panel knob, 6 filter, 6a filter right handle, 6b filter left handle, 6c filter front Handle, 7 main body, 7a protruding part, 8a, 8b air intake part, 10 air outlet, 11 fan motor, 11a motor frame, 11b motor bracket, 11c flange part, 11d motor shaft, 11e screw tightening part, 11f, 12b, 36b Shaft, 11g, 11h, first drain hole, 12 motor fixing plate, 12a screw fixing part, 12c through hole, 13 nut, 15 screw, 20 body part, 21 outer frame, 21a exhaust opening, 22 fan, 23 fan casing, 24 Hee , 25 damper, 34 bush, 36 motor cover, 36a slope, 36c slide groove, 36d screw fixing groove, 36e insertion hole, 36f, 36p U groove, 36g flange groove, 36h protrusion, 36j, 36n second drain hole, 36k , 36m drain receiving part, 36q front surface, 36r, 36t, 36u side surface, 36s back surface.

Claims

A fan motor having a first drain hole formed in the outer shell,
A fan that is rotationally driven by the fan motor,
A heater that warms the air blown by the fan,
A box-shaped body having an opening formed on one surface thereof, and a main body that houses the fan motor, the fan, and the heater;
A panel having a filter for removing foreign matter in the air taken into the fan, the panel being capable of opening and closing the opening and being attached to the main body;
A motor cover attached to the outer shell with a screw to cover the first drain hole,
The motor cover has a drain receiver that receives drain water discharged from the fan motor through the first drain hole,
The drain receiving portion has a second drain hole for draining the drain water,
The bathroom dryer, wherein the first drain hole and the second drain hole do not overlap each other in a direction in which the second drain hole is viewed from the front.
The fan motor includes a motor frame and a motor bracket that form the outer shell,
Each of the motor frame and the motor bracket has a flange portion on the end mating surface,
The bathroom dryer according to claim 1, wherein a fixing groove that engages with the flange portion is formed in the motor cover.
A fixing plate having a screw fixing portion to which the screw is fastened,
The flange portion has a convex screw tightening portion formed with a hole through which the screw can penetrate,
The motor cover includes an insertion hole through which the screw tightening portion can penetrate, a narrowed portion having a width narrower than a head of the screw, the screw tightening portion and the narrowed portion that penetrate the insertion hole, and the screw fixing portion. The bathroom drier according to claim 2, wherein a U groove for preventing interference with a tool to be tightened together with the screw is formed on the.
4. The motor cover extends in a direction intersecting with the extending direction of the U groove to reach an end of the motor cover, and a slide groove is formed in which the screw fixing portion is slidable. Bathroom dryer described in.
The said 2nd drain hole is a magnitude | size which the surface tension of the water film which the said drain water forms in the said 2nd drain hole becomes weaker than the gravity which acts on the said water film. The bathroom dryer according to any one of 1 to 4.