JPH0532756Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a snowfall detection device.

Previously, this type of snowfall detection device
Publication No. 44905, Japanese Unexamined Patent Application Publication No. 1983-93243, Japanese Utility Model Publication No. 1983
Publication No. -93882 is known.

In this known structure, two electrodes are arranged facing each other at a predetermined interval on the upper surface of a snow catcher that captures snow, and a snow melting heater is provided on the lower surface of the snow catcher to control snow falling on the snow catcher. Snowfall is detected by melting the snow with a snow melting heater and applying electricity between the electrodes using the snow melting water as a medium.

In this case, an outside temperature detector or the like is provided to determine whether the water serving as the medium is snowmelt water or snowfall water.

[The problem that the idea attempts to solve]

However, in the case of the above structure, the snow melting heater is provided below the electrodes on the snow catcher and on the underside of the snow catcher, so the heat conduction through the snow catcher to the surrounding area of the snow catcher is low, and as a result, the amount of snowfall If the amount of snow increases, snow will remain on the surrounding area of the snow plate without melting, and although the electrode detection area in the center will melt, this remaining snow will grow and condense between the surrounding areas, and as a result, the snow on the snow plate will be Even though the snow has melted at the detection part, a so-called hollowing phenomenon occurs in which snow remains in a shape above it. There were also problems in that the system could not detect snow, and even if it had already stopped snowing, it would detect snowfall due to running water from melting snow, causing malfunctions.

[Means to solve the problem]

The gist of the present invention will be explained with reference to the accompanying drawings.

In a device that captures snow on a snow catcher plate 2 and detects the snow electrically or optically, an upper cover body 6 is provided with a window 10 that exposes a detection portion 9 of the snow catcher plate 2. This relates to a snowfall detection device characterized in that an auxiliary heater 7 is disposed on the outer periphery of a window 10 of the upper cover body 6.

[Effect]

The snow around the snow catching plate 2, that is, around the detection part of the snow catching plate 2, is melted by the auxiliary heater 7.

Therefore, snow that is about to accumulate on the snow catcher 2 is melted from around the area, and even in a configuration in which, for example, the snow melting heater 5 is provided at the lower part of the snow catcher 2 as in the conventional case, the entire surface of the snow catcher 2 is melted from around the surrounding area. This ensures that the snow is melted, including the snow melting heater 5, and the snow melting heater 5 prevents the snow from melting only at the central detection portion of the snow receiving plate 2, thereby preventing the cavitation phenomenon from occurring.

〔Example〕

1 to 4 show a preferred embodiment of the present invention, in which 1 is a case, a snow catching board 2 is provided above the case 1, and two snow catching boards 2 are provided on the upper surface of the snow catching board 2. Electrodes 3 and 4 are arranged in a comb-teeth shape in isolation and facing each other, and a snow melting heater 5, in this case a surface heat heater, is provided on the lower surface of the snow catching plate 2 in the case 1.

Reference numeral 6 denotes an upper cover body, which is provided on the upper surface of the snow catcher plate 2 with the electrodes 3 and 4 (detection section) exposed;
An auxiliary heater 7 is provided on the inner back surface of the upper cover body 6, and the periphery of the snow catcher 2 is directly heated by the auxiliary heater 7 without heating by conduction via the snow catcher 2 as in the conventional case. .

Although not shown, a detection circuit is connected to the electrodes 3 and 4 and the snow melting heater 5, and a heater circuit is connected to the auxiliary heater 7.

8 is a temperature detector.

Since the present embodiment has the above-mentioned configuration, when snow is caught on the snow receiving plate 2, the snow is melted by the snow melting heater 5,
This snowmelt water energizes between the electrodes 3 and 4 to detect snowfall, and the snow around the snow catcher plate 2 is quickly melted by the auxiliary heater 7.
The entire surface of the snow receiving plate 2 is reliably melted, so that the so-called hollowing phenomenon as shown in FIG. 4 can be prevented, and erroneous operation of snowfall detection can be prevented.

Although the above embodiment detects snowfall using electrical means, it can also be applied to optical means.

[Effect of idea]

As described above, the present invention has a removably attached upper cover body that has a window that exposes the detecting part of the snow receiving plate, and an auxiliary heater is disposed on the outer periphery of the window of this upper cover body. Even if the amount of snow is large, the snow around the snow catcher, that is, around the detection part of the snow catcher, is melted by the auxiliary heater. In addition, the entire surface of the snow catcher, including the peripheral areas, will be reliably melted, and the snow melting heater will surely prevent the snow from melting only at the detection part in the center of the snow catcher, resulting in the hollowing phenomenon described above. The Rukoto.

In addition, since the upper cover body with the auxiliary heater is configured to be detachable, it can be attached to an existing snowfall detection device, and can be removed when the amount of snowfall is low and there is no risk of cavitation occurring. This makes it an extremely practical snowfall detection device.

Further, according to the configuration of the present application, it is possible to design a switching system in which the auxiliary heater is separately energized only when the amount of snowfall actually increases, resulting in an extremely practical configuration.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Figure 1 is an exploded perspective view, Figure 2 is a sectional view, Figure 3 is a front view,
Figure 4 is a cross-sectional side view of the snow. 2...Snow catching plate, 6...Upper cover body, 7...Auxiliary heater, 9...Detection section, 10...Window section.

Claims (1)

[Scope of utility model registration request] In a device that captures snow on a snow catcher plate and detects the snow electrically or optically, an upper cover body having a window portion that exposes the detection part of the snow catcher plate is removably attached. , A snowfall detection device characterized in that an auxiliary heater is disposed on the outer periphery of the window portion of the upper cover body.