JPS6111975Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotating electrical machine for outdoor installation, and particularly to a ventilation cooling structure for an open rotating electrical machine.

Generally, this type of open-type rotating electric machine is installed outdoors, and as shown in FIG. 1, an inlet 2 and an outlet 3 are formed in the upper part of a main body casing 1.
The cooling air flowing into the main body casing 1 from the suction port 2 passes through an intake air passage (not shown) to cool the rotating electrical machine main body, and is then discharged to the outside from the discharge port 3 through an exhaust air passage (not shown). It's becoming like that.

In addition, when installing this type of rotating electric machine in an area with a lot of snow, cover the inlet with a snow cover 5 as shown in Figure 2 to prevent the inlet, especially the drip-proof cover, from freezing due to snow and to cool the inlet. This prevents the area of ventilation openings from decreasing.

However, when snow is scattered like during a blizzard, the snow mixes with the cooling air and the snow covers the snow cover 5.
There is a risk that it may flow into the air passageway or into the rotating electrical machine body, or it may adhere to and freeze on the drip-proof louver or wire mesh installed in the intake port, reducing the ventilation opening area. Ta. When the ventilation opening area decreases, ventilation resistance increases significantly, making it impossible to effectively ventilate and cool the rotating electric machine body, which may cause burnout or seizure.

This idea takes into consideration the above points, and even when installed in areas with heavy snowfall, it prevents snow from penetrating into the wind duct and into the rotating electric machine, as well as from freezing due to snow, and effectively prevents the rotating electric machine from freezing. An object of the present invention is to provide a rotating electric machine equipped with a ventilation structure that can perform ventilation cooling.

Embodiments of the rotating electric machine according to the invention will be described below with reference to the accompanying drawings.

Since the exterior shape of the outdoor-installable rotating electric machine according to the present invention is substantially the same as that shown in FIGS. 1 and 2, the same reference numerals are given and the description thereof will be omitted.

The main body casing 1 of the rotating electric machine has a divided structure, and air passages 10, 11 are provided in the upper casing 1a.
is formed, and an inlet 2 and an outlet 3 are opened at predetermined positions on each side wall. Inlet port 2 and outlet port 3
A drip-proof louver 12 is installed in each of the panels to prevent rainwater from entering. The cooling air flowing in from the intake port 2 is supplied to the rotating electric machine main body 14 through the air passage 10 as an intake air passage, and after cooling the rotating electric machine main body 14 through ventilation, it passes through the exhaust passage 11. It is discharged to the outside from the discharge port 3 to prevent burnout or seizure of the rotating electric machine main body 14.

On the other hand, the suction port 2 of the upper casing 1a is removably covered by a snow cover 15. This snow cover 15 has a box shape, and has a cooling air inlet 16 formed at the bottom thereof, and guides the cooling air flowing in from the inlet 16 to the intake port 2. Furthermore, a small discharge port 17 is formed below the suction port 2 for discharging a portion of the exhaust air to the outside. Small outlet 17
The exhaust air (exhaust air) discharged from the air outlet is guided by a guide plate 18 and mixed with the cooling air flowing in from the inlet 16. The guide plate 18 has a horizontal guide portion 18a and a rising portion 18b following the horizontal guide portion 18a, and the rising portion 18b allows the length of the passage 19 from the inlet port 16 to the suction port 2 to be increased. There is.

In addition, the small outlet 17 is provided with a window 20 that can be opened/closed or detached, and this window 20 closes the small outlet 17 except during the snowfall period (winter season) and stops the exhaust air from the small outlet 17. Good too.

Next, we will discuss the effect of this idea.

In the winter when it snows, open the window 20 and open the small outlet 17.
to open. When the rotating electric machine is operated in this state, cooling air with snow flows in from the lower inlet 16 of the snow cover 15, but this inflow cooling air is discharged from the small outlet 17 as high-temperature exhaust air. and is guided along the rising portion 18b of the guide plate 18. The snow melts when the cooling air combines with the high-temperature exhaust air. The melted snow turns into water droplets before the cooling air reaches the inlet 2 of the main body casing 1, and the drip-proof louver 12
removed by This prevents snow from flowing into the wind duct 10 or being supplied to the rotating electric machine main body 14, and also reliably prevents snow from adhering to the drip-proof louver 12 of the inlet 2 and freezing. be able to.

Next, a modification of this invention will be explained with reference to FIG.

What is shown in this modification is the snow cover 15
A wire mesh 2 is placed so as to cover and cross the lower inlet 16 of the
1 stretched diagonally. The wire mesh 21 may be wavy or stepped. However,
Snow is made to adhere to this wire mesh 21, and the adhering snow is melted by the exhaust air blown out from the small outlet 17.

FIG. 5 shows a second modification of this invention.

The rotating electric machine shown in this modification is an improved version of the drip-proof louver 12 attached to the inlet 2. Each fin element 12a of the louver 12 is installed with an inclination, and the drip-proof louver 12 is attached to the fin element 12a of the louver 12. Collect the water droplets in one direction and then use the snow cover 1
5 It is designed to be discharged outside.

In addition, in the explanation of the embodiment of this invention, an example was explained in which a small discharge port was provided at the bottom of the suction port, but the formation position of the small discharge port is not necessarily limited to the bottom of the suction port, and it may be anywhere near the suction port. Bye. Also,
The passage formed within the snow cover can be modified in various ways by providing a guide plate or the like.

As described above, in the rotating electric machine according to this invention, a small discharge port is formed near the suction port of the main body casing, and a snow cover is attached to cover the suction port, and the snow flows into the snow cover. Since the cooling air can be mixed with the high-temperature exhaust air blown out from the small outlet, the snow contained in the cooling air is melted, becomes water droplets, and is removed by the drip-proof louver installed at the intake port. . Therefore, it is possible to prevent snow from adhering to the drip-proof louver and freezing. Therefore, it is possible to prevent snow from entering the inside of the wind duct and the rotating electric machine body, and
Since the opening area of the suction port does not shrink due to freezing of snow, etc., it is possible to reliably prevent ventilation resistance from increasing, effectively cooling the rotating electric machine body, and preventing burnout and seizure. It has the effect of being able to do things.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the appearance of a general rotating electric machine, Fig. 2 is a perspective view showing a snow cover attached to the main body casing of the rotating electric machine, and Fig. 3 is a perspective view of the rotating electric machine according to this invention. FIG. 4 is a partial sectional view showing an embodiment, FIG. 4 is a sectional view showing a modification of the rotating electric machine of this invention, and FIG. 5 is a diagram showing a second modification of this invention. 1...Body casing, 2...Intake port, 3...
Discharge port, 10, 11... Air duct (ventilation path), 12...
...Drip-proof louver, 14...Rotating electric machine body, 15...
Snow cover, 16... Inlet, 17... Small outlet, 18... Guide plate, 20... Small window, 21...
Wire mesh.

Claims (1)

[Scope of utility model registration request] On the side of the casing that houses the rotating electric machine,
Open the inlet and outlet ports for outside air provided with drip-proof louvers, and furthermore, in the casing, create a thin intake ventilation path for directing outside air from the inlet into the rotating electric machine body, and a thin exhaust ventilation path for exhausting air from the rotating electric machine main body to the discharge port. In a rotating electric machine that is ventilated and cooled by forming a A rotating electrical machine characterized by having a small discharge port communicating with an exhaust ventilation path.