JP2009180079A - Circulation eco-type roof snow melting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulation eco-type roof snow melting device which has a function of reducing power supply facilities of an electric power company and efficiently melting the snow accumulated during a winter period without removing it by manpower by dividing and reducing a base capacity of a main-circuit short-circuit breaker and a heater switch capacity without energizing all the heaters of the electric roof snow melting device at the same time. <P>SOLUTION: A photoelectric switch used for snow detection is attached to every heater block of the roof snow melting device, and a snow guard angle is placed so that it partitions the heater block. Then each of the heater blocks is provided with an interlock function so that it cannot be energized at the same time. The heater blocks are energized in turn from the eave, and the snow is melted. Then the base capacity of the main-circuit short-circuit breaker and the heater switch capacity can be divided and reduced. Thus, the power supply facilities of the electric power company can be reduced, and the snow can be efficiently melted by the function. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a roof snow melting device.

  Conventionally, snow detectors and snow detectors that detect snow attached to a snow melting device have only one detector per snow melting property. In other words, on a sloped roof, the accumulated snow swells to the eaves due to falling gravity, or the roof ridge part melts quickly, but the heater remains energized, or snow melting unevenness can occur This is because the snow melting device is operated by one detector.

  In addition, since the conventional electric roof snow melting device is operated by one snow detector even if the heater block is divided into several parts, the leakage breaker capacity of the main circuit is determined by the combined heater capacity. The basic contract will increase, and the switching capacity of electromagnetic contactors will increase. A basic contract fee that includes the year when snow does not fall so much is required, and the required capacity of the power company also increases.

  In addition, the following patent document 1 can be mentioned as a well-known technique relevant to this invention.

    JP 2008-138509 A

  As described above, in the conventional snow melting device, only one snow detection device is attached to one snow melting property. Therefore, on the sloped roof, the accumulated snow rises to the eaves due to falling gravity, or the roof ridge part is The current situation is that the heater melts quickly and the heater is energized even when there is no snow.

  Also, in the conventional snow detection device, even if the heater block is divided into several parts, it is necessary to energize all the heaters at the same time. Therefore, the capacity of the main circuit leakage breaker is large, and naturally the basic contract is also large. In addition, the switching capacity of electromagnetic contactors and the like is also increased, and this is the current situation that the required facility capacity of electric power companies is increased.

  The present invention has been made in view of such a situation, and an object thereof is to install an inexpensive photoelectric switch for detecting a snow melting state for each heater block, and a snow stop angle or the like in a gap for each heater block. The snow melting surface is partitioned to provide independence with respect to the melting of each heater block, and the snow melting is performed in order from the eaves to the ridge, that is, the heater blocks are not energized simultaneously. The purpose is to distribute the switch capacity by providing a lock circuit, and to reduce the leakage breaker capacity of the main circuit to lower the basic contract so that energy can be used without waste while utilizing natural snow melting.

  The circulation eco-type roof snow melting device of the present invention that achieves the above object is to install a heater block in steps from the eaves on a sloped roof, and attach a photoelectric switch for detecting snow on each heater to the fixed jig, It is characterized in that the electric power of each heater block is controlled according to the snow cover condition and the snow is melted on the roof.

  In the circulating eco-type roof snow melting device, a snow stop angle or the like is installed on each heater gap, and the snow melting by each heater block is made independent, that is, the snow melting by one heater block is performed. A roof snow melting device that is independent of the snow melting effect by partitioning with a snow stop angle.

  In addition, this circulation eco-type roof snow melting device is designed to preferentially melt the snow at the eaves part, and the photoelectric switch on the heater block detects that the snow melting at the eaves part has been completed, and the energization is stopped. After that, the heater block of the next stage is energized, and if the photoelectric switch on the heater block detects the completion of snow melting, the energization is stopped, and the heater block of the next stage is energized. A roof snow melting device, wherein an interlock circuit is provided so that the blocks are not energized simultaneously, and each heater block is energized cyclically from the eaves to melt snow.

  As described above, according to the present invention, a heater block is installed step by step from the eaves on a sloped roof, and a photoelectric switch for detecting snow on each heater block is attached to a fixed jig, and each heater block is installed. Designing the circuit so that the snow melting effect is made independent by installing a snow stop angle on the gap and partitioning the snow melting surface, preferentially energizing the heater at the eaves part, and each heater block Since an interlock circuit was installed so that the current would not be energized at the same time, and the circuit was energized cyclically from the heater block at the eaves, the snow elevates the eaves by the falling gravity of the snow, rather than having one snow detector for each snowmelt property. There is no unevenness of snow melting or waste of energy, such as the snow rising and the ridges of the roof melting quickly, but still energized. Moreover, the system that operates with one snow detector simultaneously energizes all the heater blocks, so the main circuit's earth leakage breaker capacity is determined by the combined heater capacity, and the basic contract becomes larger. However, in this circulation eco-type roof snow melting device, this is not the case, and the basic contract is one-half if the heater block is two stages, and one-third if the three-stage heater block. And so on. In addition, it is possible to save the necessary equipment capacity of the power supply company, which is extremely effective.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1 and 2 relate to the first embodiment of the present invention, FIG. 1 is a sectional view of roof snow melting installation, and FIG. 2 is an electric circuit diagram thereof.

  As shown in FIG. 1, photoelectric switches 6, 7, and 8 that detect snow are individually installed on the fixing jig 5 on the heater blocks 1, 2, and 3 shown by diagonal lines. In particular, roof tiles and tin are attached immediately above the heater blocks 1, 2, and 3.

  As shown in FIG. 1, a snow stop angle 4 is mounted on the gap between the heater blocks 1, 2, 3 to partition the snow melting surface.

  As shown in FIG. 2, electricity is supplied from the power source 14 via the earth leakage breaker 15, but when snow begins to accumulate on the roof, the photoelectric switch 6 detects the snow accumulation, the electromagnetic contactor 9 works, and the electromagnetic contact The contact 16 of the device 9 is connected, and the back contact 12 of the electromagnetic contactor 9 is opened. Then, electricity is passed through the heater block 1 and snow melting begins. At that time, the electromagnetic contactors 10 and 11 for driving the heater blocks 2 and 3 do not work because the back contact 12 of the electromagnetic contactor 9 is open. Of course, since the contacts 17 and 18 of the magnetic contactor are not connected, electricity is not supplied to the heater blocks 2 and 3. The safety switch 19 is a manual switch.

  Next, as shown in FIG. 2, when energization of the heater block 1 is started, the snow on the heater block 1 naturally melts, so that the photoelectric switch 6 operates and the electromagnetic contactor 9 stops, and the electromagnetic contactor 9 The contact 16 is opened and the supply of electricity to the heater block 1 is stopped. At that time, naturally, the back contact 12 of the electromagnetic contactor 9 is connected, and the conditions under which the electromagnetic contactor 10 operates are set.

  Next, as shown in FIG. 2, since the snow naturally accumulates also on the heater block 2, the photoelectric switch 7 detects the snow accumulation, the electromagnetic contactor 10 is activated, and the contact 17 of the electromagnetic contactor 10 is connected. Then, electricity is supplied to the heater block 2 and snow melting begins and the snow above it melts. When the electromagnetic contactor 10 is working, the back contact 13 of the electromagnetic contactor 10 is open, so that the electromagnetic contactor 11 does not work, so no electricity is supplied to the heater block 3.

  Next, as shown in FIG. 2, when the snow of the heater block 2 melts, the photoelectric switch 7 detects that, so the magnetic contactor 10 stops, the contact 17 of the electromagnetic contactor 10 opens, and the back contact of the electromagnetic contactor 10. 13 can be connected and the electromagnetic contactor 11 can operate.

  Next, as shown in FIG. 2, when the photoelectric switch 8 detects snow accumulation on the heater block 3 and the electromagnetic contactor 11 is activated, the contact 18 of the electromagnetic contactor 11 is connected, electricity is supplied to the heater block 3, and snow melting occurs. Begins.

  Although the embodiment of the present invention has been described above, the scope of the present invention is not limited to this. For example, in order to disperse snow slip when the amount of snowfall per hour is considerably large, it is possible to disperse the falling gravity of snow by installing a relatively small Fuji-shaped snow guard between the snow guard angles 4 .

  This circulating eco-roof snow melting can be applied not only to electricity but also to boilers as heat sources.

  In addition, the heaters of the heater blocks 1, 2, and 3 can be either self-temperature control type heaters or normal insulation type types using nichrome wire or copper chrome, etc., which can take a sufficient heat source. .

  It is roof snow-melting installation sectional drawing concerning the 1st Embodiment of this invention.   FIG. 2 is an electric circuit diagram of FIG. 1.

1, 2, 3 Heater block 4 Snow stop angle 5 Photoelectric switch fixing jig 6, 7, 8 Photoelectric switch 9 Magnetic contactor (for heater block 1)
10 Magnetic contactor (for heater block 2)
11 Magnetic contactor (for heater block 3)
12 Back contact of electromagnetic contactor 13 Back contact of electromagnetic contactor 14 Power supply 15 Earth leakage breaker 16 Contact of electromagnetic contactor 17 Contact of electromagnetic contactor 18 Contact 19 of electromagnetic contactor 19, 20, 21 Safety switch (manual)

Claims (3)

    This device is an electric roof snow melting device. On the sloped roof, heater blocks are installed step by step from the eaves, and a photoelectric switch that detects snow on each heater block is attached to a fixed jig. The roof snow melting device is characterized in that it controls the energization of each heater block to melt the snow on the roof.     The roof snow melting device is provided with a snow stop angle or the like above each heater block gap to provide independence with respect to the snow melting by each heater block, that is, the snow melting by one heater block is prevented from snow. A roof snow melting device that is independent of the snow melting effect by partitioning with an angle.     In the roof snow melting device, a circuit is designed to preferentially melt the snow at the eaves part, and after the snow melting of the eaves part is completed, the photoelectric switch on the heater block detects and the energization is stopped. Each heater block is turned on at the same time, such as when the next heater block is energized, and when the photoelectric switch on that heater block detects the completion of snow melting, the energization stops. A roof snow melting device characterized in that an interlock circuit is provided so as not to energize, and snow is melted by energizing cyclically.

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