CN113056646A

CN113056646A - Bathroom drier

Info

Publication number: CN113056646A
Application number: CN201880098645.XA
Authority: CN
Inventors: 渡边史吉; 丝鱼川康之; 酒井洋司; 大和秀肇; 本木一郎; 竹居寿刚; 诹访宏幸
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2021-06-29
Anticipated expiration: 2038-10-19
Also published as: JP6929472B2; JPWO2020079846A1; TWI714981B; TW202016474A; CN113056646B; WO2020079846A1

Abstract

The bathroom dryer of the present invention comprises: a fan motor having first discharge holes (11g, 11h) formed in the outer contour thereof; a fan driven by a fan motor; a heater heating air blown by the fan; a main body having a box shape with an opening formed on one surface and accommodating a fan motor, a fan and a heater; a panel having a filter for removing foreign matters in the air taken into the fan and mounted on the main body in a manner of opening and closing the opening; and a motor cover (36) which is mounted on the outer frame by screws and covers the first discharge holes (11g, 11h), wherein the motor cover (36) has a discharge receiving part for receiving the discharged water discharged from the fan motor through the first discharge holes (11g, 11h), the discharge receiving part is provided with second discharge holes (36j, 36n) for discharging the discharged water, and the first discharge holes (11g, 11h) and the second discharge holes (36j, 36n) do not overlap in the direction of the second discharge holes (36j, 36n) when viewed from the front.

Description

Bathroom drier

Technical Field

The present invention relates to a bathroom dryer having a heating operation for blowing warm air into a bathroom, a ventilating operation for discharging air from the bathroom to the outside, and a drying operation for simultaneously blowing warm air into the bathroom and discharging air from the bathroom, and in which an air passage is switched by a damper.

Background

The bathroom dryer houses a fan, a fan motor, and a heater in a box-shaped main body having an opening formed in one surface. The opening surface of the main body is covered with a panel provided with a filter for removing foreign matters in the air taken in by the fan. When the bathroom dryer is operated in a state where the interior of the bathroom is highly humid, the environment around the fan motor in the air duct is also highly humid, and moisture enters the inside of the fan motor.

When moisture enters the fan motor, the inner surface of the outer casing of the fan motor is condensed, and the drain water is accumulated in the lower portion. In order to discharge this drain water, as shown in patent document 1, a drain hole is generally provided in a side surface of an outer casing of the fan motor to discharge the drain water.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-173535

Disclosure of Invention

Problems to be solved by the invention

A bathroom dryer that is capable of opening the panel for cleaning the filter without the use of tools has the potential for the fan motor to be in direct contact with the water. Even when the fan motor is provided with the drain hole in the outer periphery thereof to allow water inside the fan motor to be drained, it is necessary to prevent water from entering the inside of the fan motor through the drain hole from the outside as much as possible. Therefore, a bathroom dryer using a fan motor having discharge holes formed in the side surfaces of the motor housing as in patent document 1 needs waterproof performance for preventing water from entering the inside of the fan motor even when the panel is opened. Therefore, it is necessary to form the following configuration: even if water contacts the outer contour of the fan motor, the water will not enter the fan motor from the discharge hole, and the discharged water generated by dew condensation in the fan motor can be reliably discharged from the discharge hole.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bathroom dryer capable of preventing water from entering from the outside into the fan motor and discharging drain water generated inside the fan motor to the outside.

Means for solving the problems

In order to solve the above problems and achieve the object, the present invention includes: a fan motor having a first discharge hole formed on an outer contour thereof; a fan rotationally driven by a fan motor; a heater for heating air blown by the fan; a main body having a box shape with an opening formed on one surface and accommodating a fan motor, a fan and a heater; a panel having a filter for removing foreign matters in the air taken in by the fan and mounted on the main body in a manner of opening and closing the opening; and a motor cover mounted to the outer frame by screws and covering the first discharge 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 receiving portion is formed with a second drain hole for draining the drain water. The first discharge hole and the second discharge hole do not overlap in a direction in which the second discharge hole is viewed from the front.

Effects of the invention

The bathroom dryer of the invention can achieve the following effects: the water can be prevented from entering the fan motor, and the drain water generated in the fan motor can be discharged to the outside.

Drawings

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

Fig. 2 is a longitudinal sectional view showing an internal structure of a main body of a bathroom dryer according to embodiment 1.

Fig. 3 is a front view of the bathroom dryer of embodiment 1 with the front panel removed.

Fig. 4 is a front view of the bathroom dryer of embodiment 1 with the front panel and the filter removed.

Fig. 5 is a perspective view of the bathroom dryer of embodiment 1 with the panel, filter, and fan case removed.

Fig. 6 is a perspective view of the bathroom dryer of embodiment 1 with the panel, filter, fan housing, and fan removed.

Fig. 7 is a perspective view of the front side of the motor cover of the bathroom dryer of embodiment 1.

Fig. 8 is a perspective view of the rear side of the motor cover of the bathroom dryer of embodiment 1.

Fig. 9 is a plan view of a motor cover of the bathroom dryer of embodiment 1.

Fig. 10 is a sectional view of the motor cover of the bathroom dryer of embodiment 1.

Fig. 11 is a perspective view of the fan motor, the fixing plate, and the fan of the bathroom dryer according to embodiment 1.

Fig. 12 is an exploded perspective view of the fan motor, the fixing plate, and the motor cover of the bathroom dryer according to embodiment 1.

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.

Embodiment mode 1

Fig. 1 is a perspective view showing an assembled state of a bathroom dryer according to embodiment 1 of the present invention. The bathroom dryer 1 includes a panel 2 forming an outer appearance surface on an inner surface of a bathroom, and a main body 20 covered with a box-shaped metal shell. The panel 2 includes a panel base 3 and a front panel 4. The panel 2 sucks air from three directions, up and right and left, between the panel base 3 and the front panel 4. The front panel 4 can be opened by rotating the panel knob 5 to release the engagement portion between the front panel 4 and the panel base 3. Note that illustration of the engaging portion between the front panel 4 and the panel base 3 is omitted.

The air outlet 10 is formed in the front panel 4 as an air outlet for blowing warm air.

Fig. 2 is a longitudinal sectional view showing an internal structure of a main body of a bathroom dryer according to embodiment 1. The main body 20 includes an outer frame 21 forming an outer frame, a fan 22 for blowing air, a fan motor 11 for driving the fan 22, a resin main body 7 forming an air passage for an air flow generated by the fan 22, and a fan case 23 for blowing air. The main body 7 has a box shape with an opening formed in one surface. The surface of the main body 7 on which the opening is formed is covered with the panel 2. In fig. 2, the fan motor 11 is hidden in the dark of the fan 22, and only the motor shaft 11d is shown in the drawing. Further, the main body 20 accommodates: a heater 24 that heats air blown by the fan 22; an outlet 10 that blows out heated air; a damper 25 for switching operation modes of ventilation, heating and drying; a motor for driving the shutter 25; and an air discharge opening 21a for discharging air outwardly.

The bathroom dryer 1 performs an exhaust operation of discharging air from the exhaust opening 21a to the outside, a heating operation of flowing heated air from the blow-out port 10 into the bathroom, or a drying operation of discharging a part of the air in the bathroom from the exhaust opening 21a to the outside, heating a part of the air, and returning the heated air to the bathroom by driving the damper 25 to switch the air passage.

The air sucked from between the panel base 3 and the front panel 4 passes through the filter 6 and then flows in the air passage. The filter 6 removes foreign substances in the air taken in by the fan 22.

Fig. 3 is a front view of the bathroom dryer of embodiment 1 in a state where the front panel is opened. When the panel knob 5 attached to the panel base 3 is oriented in the lateral direction, the hook portion 4a provided at the lower portion of the front panel 4 is disengaged, and the front panel 4 can be rotated upward about the engaging portion of the front panel 4 with the panel base 3 at the upper portion of the front panel 4, thereby opening the front panel 4. The filter 6 is mounted to the panel base 3. Even in the state where the front panel 4 is closed, the filter 6 can be detached from the panel base right side 3a by gripping the filter right grip 6a, and can be detached from the panel base left side 3b by gripping the filter left grip 6 b. In addition, if the front panel 4 is opened, the filter 6 can be detached forward by gripping the filter front handle 6 c. In this way, the filter 6 can be removed from multiple directions. Therefore, even if there is a wall on either the left or right side of the main body 20 of the bathroom dryer 1, the filter 6 can be removed, thereby eliminating the installation restriction of the bathroom dryer 1 and improving the maintainability.

Fig. 4 is a front view of the bathroom dryer of embodiment 1 with the front panel opened and the filter removed. The front panel 4 and the filter 6 can be removed without using tools. A fan 22 shown in fig. 2 for blowing air, a fan motor 11 for driving the fan 22, a motor fixing plate 12 for holding the fan motor 11, and a fan case 23 for forming an air passage of the fan 22 are provided in an opening portion from which the filter 6 is removed. The fan 22 sucks air from an air suction portion 8a and an air suction portion 8b, the air suction portion 8a being located between the fan case 23 and the protruding portion 7a of the main body 7 that houses the product drive circuit, not shown, and the air suction portion 8b being located between the fan case 23 and the fan motor 11, and blows air.

Fig. 5 is a perspective view of the bathroom dryer of embodiment 1 with the panel, filter, and fan case removed. Fig. 6 is a perspective view of the bathroom dryer of embodiment 1 with the panel, filter, fan housing, and fan removed. A motor fixing plate 12 is attached to the main body 7. The fan motor 11 is mounted on 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 with its rotation shaft oriented in the lateral direction. The fan 22 is a double suction blade that sucks air from both the

air suction portions

8a and 8 b.

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

The adhesive is applied to the entire periphery of the flange portion 11 c. The lead wire insertion portion is closed by a resin bush 34. The bearing on the motor frame 11a side is a sealed bearing. The bathroom dryer 1 of embodiment 1 prevents the entry of moisture into the interior of the fan motor 11 by these moisture entry prevention measures.

Fig. 7 is a perspective view of the front side of the motor cover of the bathroom dryer of embodiment 1. Fig. 8 is a perspective view of the rear side of the motor cover of the bathroom dryer of embodiment 1. Fig. 9 is a plan view of a motor cover of the bathroom dryer of embodiment 1. Fig. 10 is a sectional view of the motor cover of the bathroom dryer of embodiment 1. Fig. 10 shows a cross section along the X-X line in fig. 9. The motor cover 36 has a shape having a longitudinal direction and a short-side direction. In embodiment 1, the motor cover 36 has a rectangular parallelepiped shape. A first recess and a second recess are formed in a 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 recess is constituted by a screw fixing groove 36d and a U-groove 36f, and reaches a side surface 36r on one end side in the longitudinal direction. The first and second recesses are connected by a U-groove 36 p. The U-groove 36p is a narrow portion having a width narrower than the head of the screw 15.

In the first recess, an insertion hole 36e is formed at an end portion on the U-groove 36p side. The side wall of the U-groove 36p side end portion of the first recess is a slope 36a protruding in an eaves shape above the insertion hole 36 e.

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

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

concave drain receivers

36m and 36k having a bottom surface 36q are formed. The side surfaces 36r and 36t extending in the short-side direction of the motor cover 36, that is, the back surface 36s sides of the

side surfaces

36r and 36t at both ends in the long-side 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 the fan motor, the fixing plate, and the fan of the bathroom dryer according to embodiment 1. Fig. 12 is an exploded perspective view of the fan motor, the fixing plate, and the motor cover of the bathroom dryer according to embodiment 1. The slide groove 36c extends in a direction intersecting the extending direction of the U groove 36f and reaches an end of the motor cover 36, and the screw fixing portion 12a is slidable. The motor cover 36 is attached to a lower portion of the fan motor 11 in a state where the bathroom dryer 1 is mounted. The motor cover 36 is fixed to the outer periphery of the fan motor 11 in a state where the rear surface 36s side faces the outer periphery of the fan motor 11. Specifically, the flange portion 11c is inserted into the flange groove 36g, the screw fastening portion 11e protruding from the flange portion 11c is inserted into the insertion hole 36e of the motor cover 36, the inclined surface 36a is brought into contact with the outer shape of the screw fastening portion 11e, and the screw fastening portion 11e is fitted into the insertion hole 36 e. Then, the shaft 11f of the screw fastening portion 11e is aligned with the shaft 36b of the motor cover 36. In a state where the shaft 11f of the screw fastening portion 11e is aligned with the shaft 36b of the motor cover 36, the motor frame 11a is rotated in the circumferential direction of the fan motor 11 through the through hole 12c of the motor fixing plate 12, the screw fastening portion 12a protruding in the center direction of the through hole 12c is slid through the slide groove 36c, and the shaft 11f of the screw fastening portion 11e is aligned with the shaft 12b of the screw fastening portion 12 a. 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 while the motor cover 36 is positioned on the outer periphery of the fan motor 11. Then, the screw 15 is inserted into the U-groove 36p, which is a narrow portion for screw fixation, from the screw fixation groove 36d of the motor cover 36, and the motor cover 36 is fastened and fixed to the motor fixation plate 12 together with the fan motor 11. Specifically, the screw fastening portion 11e penetrating the insertion hole 36e and the U-groove 36p of the motor cover 36 are fastened together to the screw fastening portion 12a with the screw 15. Since the motor cover 36 has the U-shaped groove 36f formed along the shaft 36b, the handle of the driver can be prevented from interfering with the motor cover 36 when the screw 15 is tightened.

The bathroom dryer 1 requires waterproof performance equivalent to the antifoaming IPX4 in the waterproof rating of the International Electrotechnical Commission (IEC). Since the bathroom dryer 1 is in a dimensional relationship in which the motor cover 36 is in contact with the side surface of the fan motor 11 and the flange portion 11c is in contact with the flange groove 36g of the motor cover 36 or is separated therefrom by a slight gap, water does not enter the motor cover 36 from between the motor cover 36 and the side surface of the fan motor 11 even if water comes into contact therewith. The second discharge holes 36j, 36n of the motor cover 36 are arranged at positions shifted from the first discharge hole 11g of the motor bracket 11b and the first discharge hole 11h of the motor frame 11 a. Therefore, the second discharge hole 36j does not overlap with the first discharge hole 11g when viewed from the front in the direction of the second discharge hole 36 j. Likewise, the second discharge hole 36n does not overlap the first discharge hole 11h when viewed from the front in the direction in which the second discharge hole 36n is viewed. Thus, the second discharge holes 36j, 36n of the motor cover 36 do not overlap the first discharge hole 11g of the motor bracket 11b and the first discharge hole 11h of the motor frame 11a, and therefore the first discharge holes 11h, 11g are shielded by the motor cover 36. Therefore, even if water enters the motor cover 36 due to water scattering, water does not enter the fan motor 11. In particular, although the motor bracket 11b is likely to come into contact with water from the outside, the protrusion 36h formed by the plate thicknesses of the screw fixing groove 36d and the U-groove 36f cuts off the path through which water linearly scatters from the second discharge hole 36j of the motor cover 36 to the first discharge hole 11g of the motor bracket 11 b.

When the drain water is generated by the dew condensation in the fan motor 11, the drain water falling from the first drain hole 11g to the drain receiving portion 36k of the motor cover 36 is discharged through the second drain holes 36j of the motor cover 36 located at two positions on the motor bracket 11b side. On the motor frame 11a side, the drain water that falls from the first drain hole 11h to the drain receiver 36m of the motor cover 36 is drained through the second drain hole 36n of the motor cover 36. The second discharge holes 36j, 36n of the motor cover 36 are set to a size that does not accumulate water due to surface tension. Specifically, the sizes of the second discharge holes 36j and 36n are set to be smaller than the gravity acting on the water film formed by the discharged water in the second discharge holes 36j and 36 n. If the second discharge holes 36j, 36n are of a size that satisfies this condition, the discharged water will not stay in the second discharge holes 36j, 36n even in a state where water is not accumulated in the

discharge receiving portions

36k, 36m and the water film formed by the discharged water in the second discharge holes 36j, 36n is not pushed by the discharged water from above.

In the bathroom dryer 1 of embodiment 1, the motor cover 36 is fixed to the fan motor 11 by the screws 15 and shields the first discharge holes 11h and 11g, so that even if water comes into contact with the fan motor 11 from the outside, the water can be prevented from entering the fan motor 11. Further, since the motor cover 36 is provided with the

discharge receiving portions

36k and 36m for receiving the drain water discharged from the inside of the fan motor 11 in front of the first discharge holes 11h and 11g, and the second discharge holes 36j and 36n are provided in the

discharge receiving portions

36k and 36m, the drain water generated inside the fan motor 11 can be discharged to the outside of the fan motor 11.

In particular, when the bathroom dryer is a wall-mounted type or a window-mounted type, the fan motor is provided at a lower position than when the bathroom dryer is mounted on a ceiling, and therefore, the fan motor is likely to directly contact water. Therefore, a bathroom dryer mounted on a wall or a window needs to reliably take measures against water intrusion from the outside into the fan motor. The bathroom dryer 1 of embodiment 1 can be installed at a position lower than the ceiling because water can be prevented from entering the inside of the fan motor 11 from the outside.

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 bathroom dryer, 2 panels, 3 panel base, 3a panel base right, 3b panel base left, 4 front panel, 4a hook, 5 panel knob, 6 filter, 6a filter right handle, 6b filter left handle, 6c filter front handle, 7 body, 7a protrusion, 8a, 8b air intake, 10 blow out, 11 fan motor, 11a motor frame, 11b motor bracket, 11c flange, 11d motor shaft, 11e screw fastening, 11f, 12b, 36b shaft, 11g, 11h first exhaust hole, 12 motor fixing plate, 12a screw fixing part, 12c through hole, 13 nut, 15 screw, 20 body part, 21 outline frame, 21a exhaust opening, 22 fan, 23 fan housing, 24 heater, 25 baffle, 34 bushing, 36 motor cover, 36a slope, 36c sliding groove, 36d screw fixing grooves, 36e insertion holes, 36f, 36p U grooves, 36g flange grooves, 36h protrusions, 36j, 36n second discharge holes, 36k, 36m discharge sockets, 36q surfaces, 36r, 36t, 36u side surfaces, 36s back surfaces.

Claims

1. A bathroom dryer is provided with:

a fan motor having a first discharge hole formed on an outer contour thereof;

a fan rotationally driven by the fan motor;

a heater for heating the air blown by the fan;

a main body having a box shape with an opening formed in one surface thereof, and accommodating the fan motor, the fan, and the heater;

a panel having a filter for removing foreign matters in the air taken in by the fan and attached to the main body so as to open and close the opening; and

a motor cover mounted to the outer frame by a screw and covering the first discharge hole,

the motor cover has a discharge receiving part that receives the discharge water discharged from the fan motor through the first discharge hole,

the drain receiving portion is formed with a second drain hole for draining the drain water,

the first discharge hole and the second discharge hole do not overlap in a direction in which the second discharge hole is viewed from the front.

2. The bathroom dryer of claim 1,

the fan motor comprises a motor frame and a motor bracket which form the outline,

the motor frame and the motor bracket each have a flange portion at an end mating surface,

the motor cover is formed with a fixing groove engaged with the flange portion.

3. The bathroom dryer of claim 2,

comprises a fixing plate having a screw fixing portion for fastening the screw,

the flange portion has a convex screw fastening portion formed with a hole through which the screw can pass,

the motor cover is formed with an insertion hole through which the screw fastening portion can be inserted, a narrowed portion having a width narrower than a head portion of the screw, and a U-shaped groove for preventing interference with a tool for fastening the screw fastening portion inserted through the insertion hole and the narrowed portion to the screw fixing portion together with the screw.

4. The bathroom dryer of claim 3, wherein the motor cover is formed with a slide groove extending in a direction intersecting with an extending direction of the U-groove and reaching an end of the motor cover, the screw fixing portion being slidable.

5. The bathroom dryer of any one of claims 1 to 4, wherein the size of the second discharge hole is such that the surface tension of the water film formed by the discharge water at the second discharge hole is weaker than the gravity acting on the water film.