JPS6212193Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a range hood fan that includes a motor and a fan, and its purpose is to provide a range hood fan that has a simple configuration and can improve the cooling effect of the motor.

An embodiment of the present invention will be described below based on the drawings. Reference numeral 1 denotes a substantially box-shaped hood with an open bottom, the open bottom of which serves as an air suction port 2. Reference numeral 3 denotes a casing disposed within the hood 1, which has an opening 4 formed on its lower surface, and a joint cylinder 5 communicating with the inside on one side, which penetrates the hood 1 and is led out to the outside. It is provided. Reference numeral 6 denotes a bell mouth having an intake port 7 formed in the center thereof, and this bell mouth is fixed to the lower surface of the opening periphery of the opening 4 of the casing 3.

Now, 8 is a motor located within the intake port 7 with a ventilation space left around it, and this is attached to the bell mouth 6 via a plurality of arms 9 extending radially on the outer circumferential surface. ing. A rotating shaft 10 of the motor 8 projects upward into the casing 3, and a fan 11 is fitted therein. Reference numeral 12 denotes a wind guide cover, which has an inlet 12b formed on the lower surface of a cylindrical body 12a with a diameter rising from near the opening edge of the inlet 7 of the bell mouth 6.
The inner diameter D of the intake port 7 of the motor 8 is set larger than the outer diameter M of the motor 8, while the height H of the intake port 7 of the motor 8 is set larger than the outer diameter M of the motor 8.
slightly higher than the protrusion length P from the suction port 12
The inner diameter I of b is set to a value slightly larger than the outer diameter M of the motor 8. The air guide cover 12 is fixed to the bell mouth 6 by welding or the like through its upper opening edge. In this state, the outer wall of the air guiding cover 12 surrounds the motor 8 at a predetermined distance, while the opening of the suction port 12b faces the lower surface of the motor 8. In addition, 13 is a filter provided at the air suction port 2 of the hood 1;
4 is provided at the lower front part of the hood 1, and a motor 8
This is a switch that turns off the power.

Now, the range hood fan configured in this way is installed on the side wall of the kitchen, and has a motor 8.
When energized, the rotation of the fan 11 causes indoor air to flow through the air suction port 2 - filter 13 - wind guide cover 1
The air is discharged outside through 2-intake port 7-casing 3-joint cylinder 5 in this order, and ventilation operation is performed.

Incidentally, although the motor 8 has conventionally been provided at the intake port 7 and is cooled by the air flow sucked into this, a member corresponding to the air guide cover 12 of the present invention is not provided. However, there is a problem in that the air flow only flows along a portion of the motor 8, and the cooling effect is low.

In contrast, in this embodiment, the air guide cover 12 is provided so as to surround the motor 8, so that when air is drawn into the air guide cover 12, it flows along the lower surface of the motor 8. On the other hand, due to the fact that the diameter of the air guide cover 12 is as small as that of the intake port 7, in the process of drawing air from the air guide cover 12 to the intake port 7 side, the entire circumference of the outer circumferential side of the motor 8 is (see arrows in the drawing). In this way, during ventilation operation, the air flows along the lower surface and the entire circumferential side of the motor 8, that is, the entire circumference of the motor 8, so the cooling effect can be improved compared to the conventional method in which air flows only along a part of the motor. . In addition, while producing such an effect, only the single air guide cover 12 is required, which simplifies the configuration.

In this embodiment, the air guide cover 12 is fixed to the bell mouth 6 by welding or the like, but the structure is not limited to fixing by welding or the like. Good too.

As described above, according to the present invention, since air flows around the entire circumference of the motor during operation, the cooling effect of the motor can be improved.Moreover, while achieving this effect, it is possible to achieve a simple configuration. This makes it possible to provide an excellent range hood fan.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing one embodiment of the present invention, in which 3 is a casing, 7 is an intake port, 8 is a motor, 11 is a fan, 12 is a wind guide cover, and 12b
is the inlet.

Claims (1)

[Scope of utility model registration request] A casing having an intake port, a motor disposed within the intake port so as to leave a ventilation space around the casing, and a motor provided within the casing and driven by the motor to draw indoor air through the intake port. A fan that sucks air and discharges it outside,
A portion that rises from the vicinity of the opening edge of the intake port on the outside of the casing and surrounds the motor together with the intake port with a predetermined space surrounding the motor, and is located at a portion facing the lower surface of the motor. A range hood fan comprising a wind guide cover having an intake port smaller than the intake port.