JPS6124825Y2 - - Google Patents

Description

[Detailed explanation of the idea]

This invention mainly relates to an electric ventilator that forcibly inhales odors from toilet tanks, etc. through an exhaust pipe and releases them to the outside world.The purpose of this device is to efficiently perform forced exhaustion In addition to suppressing noise as much as possible and saving power, the system also prevents rainwater, especially snow in cold regions, from blowing into the interior from the outside. For this reason, in the present invention, an annular opening is formed between the periphery of the cap-shaped lid that houses the motor inside and the opening periphery of the cylinder fixed to the tip opening of the exhaust pipe, and the rotation is made at the center position. In an electric ventilator that forcibly inhales air in an exhaust pipe and dissipates it to the outside through a fan, a rising rib is provided on the periphery of the opening, and the inner circumferential surface of the rib is the same as the inclined periphery of the cylinder. It forms an inclined surface on a surface.
This has succeeded in reducing power consumption and increasing displacement under the same conditions, while also reducing noise.Furthermore, the stepped portion formed by the ribs prevents rain and snow from entering the vehicle from the outside. This makes it possible to achieve the effect of killing three or four birds with one stone by effectively blocking intrusions. The gist of the present invention will be explained below based on the embodiments shown in the drawings. Reference numeral 1 designates a lid body, which has a peripheral edge 2 extending outwardly and approximately horizontally, fixes a bottom plate 3 that closes the opening, houses a motor 4 in the lid body 1, and has a rotating shaft 5 connected to the bottom plate 3. It protrudes downward from the center and has an inverted conical head 6 fixed thereto. A plurality of wings 7 are spirally arranged on the head 6, and together with the head 6 form a fan 8. 9 covers the exhaust pipe 10,
A cylindrical body fixed to the tip of the exhaust pipe 10 with screws 11, which includes an outer cylindrical part 9a, an inner cylindrical part 9b, an inclined peripheral edge 12 connecting the outer cylindrical part and the inner cylindrical part, and an opening projecting outward. Like the lid 1, these are made of synthetic resin material or the like. Reference numeral 15 denotes a plurality of pillars provided so as to form a constant gap d between the periphery 2 of the lid 1 and the opening periphery 14 of the cylindrical body 9, and are fixed with screws 16. Lower edge 7' of each of the plurality of wings 7 fixed to the head 6
and the inclined peripheral edge 12 are substantially parallel to each other, and the fan 8
The air in the exhaust pipe 10 is suctioned by the rotation of the exhaust pipe 10, and is dissipated in all directions through the gap d. Although the above-mentioned configuration is one that general electric ventilators of this type have, in the present invention, by providing the rib 20 that goes around the opening periphery 14 described above, this rib 20 has the structure shown in the first figure. The inner peripheral wall 21 is integrally formed along the inclined peripheral edge 12, while the outer peripheral wall 22 is formed to intersect the opening peripheral edge 14 at a substantially right angle. Therefore, most of the rainwater blown into the gap d from the outside by wind or the like hits the step formed by the outer peripheral wall 22 and is blocked, especially in snowy areas. This has succeeded in eliminating as much as possible the risk that the rotation of the fan 8 will be prevented due to snow entering and accumulating between the inclined peripheral edge 12 and the fan 8. Furthermore, by adjusting the height H of the rib 20 described above, the following experimental results were obtained, which increases the ventilation amount, saves power consumption, and further reduces noise. It was also possible to reduce the To describe three types of ribs depending on the height of the ribs, A shown in Fig. 3 shows a cross section of the main part of a conventionally used ventilator. A certain gap d is formed between the opening periphery 14 of the opening 9 and the rib 20 shown in FIGS. B and C does not exist at all. Figure B is rib 2
The height H of 0 is set to 1 mm, and the height H of Figure C is further set to 2 mm. In both cases, the gap d and other conditions are the same. The numerical values measured for a plurality of ventilators, here 5 (n1 to n5), are as follows. Example 1

【table】 Example 2

【table】 Example 3

【table】 Example 4

【table】 Example 5

[Table] From the above results, as can be understood by considering the average values for power consumption W and current A, 50Hz
It will be understood that in experiments at 60 Hz and 60 Hz, the rib height H of 2 mm is more efficient. In Example 3, the height H of the rib is 2
It was detected that the rotation speed could be increased to the same level or even higher by increasing the rotation speed to mm, and as seen in Examples 4 and 5, this resulted in a significant increase in air volume and a significant reduction in noise. The average value of airflow at 50/60Hz
This resulted in an increase of 0.24/0.26 m ³ /min, and in terms of noise, an average decrease of 1.7/2.1 horns. As described above, according to the present invention, by arranging the ribs 20 in a circular pattern, it is possible to improve the ventilation capacity and to suppress noise, and also to reduce power consumption. It has a number of excellent features such as being able to prevent blowing into the air, and can bring about great practical benefits.

[Brief explanation of the drawing]

Figure 1 is a vertical side view of the electric ventilator of the present invention, Figure 2
The figure is a bottom view, and FIG. 3 is a longitudinal side view showing the main parts of conventional product A and products B and C of the present invention, respectively. 1... Lid body, 2... Periphery, 3... Bottom plate, 4...
Motor, 5...rotating shaft, 6...head, 7...
Wing, 8...Fan, 9...Cylinder body, 9a...Outer cylinder part, 9b...Inner cylinder part, 10...Exhaust pipe, 11...
Screw, 12... Inclined periphery, 14... Opening periphery, 1
5... Support column, d... Gap, 20... Rib, 21...
...Inner peripheral wall, 22...Outer peripheral wall, H...Height of rib.

Claims (1)

[Scope of utility model registration request] The motor is housed inside a cap-shaped lid body having a bottom plate, and a certain gap is provided between the opening periphery of a cylindrical body that covers the tip opening of the exhaust pipe and the periphery of the lid body, and the motor is directly connected to the motor. In the electric ventilator, the air in the exhaust pipe is forcibly discharged from the gap by a fan, the fan having an inverted conical head and a plurality of wings protruding from the head in a spiral shape. An electric ventilator characterized in that a cylindrical body is provided with an inclined peripheral edge facing the blade, and a rising rib having an inclined surface along the inclined peripheral edge is protruded around the opening peripheral edge.