KR102388217B1 - Snow melting device for roof - Google Patents

Abstract

The present invention melts the roof snowmelting operation of a factory or industry composed of a steel frame lightweight panel with a snowmelting liquid, and after the snowmelting operation is completed, the washing water is selected to prevent corrosion of the steel panel panel and corrosion of the pipeline according to the temperature conditions of the outside air After the cleaning operation of the snow melt caused by the spraying of washing water is completed, compressed air is sprayed through the pump and pipe to prevent freezing of the pump and pipe by the washing water. An object of the present invention is to provide a roof snowmelting device having an improved anti-corrosion and anti-freeze function so that it can have both the functions of corrosion prevention and freeze protection by draining it.

Description

Roof Snow Melting Device with Corrosion Prevention and Freeze Prevention Function {SNOW MELTING DEVICE FOR ROOF}

The present invention relates to a roof snowmelting apparatus having corrosion prevention and freeze protection functions, and in particular, the roof snowmelting operation of a building such as a factory or industrial company composed of a steel frame lightweight panel is performed with a snowmelting liquid, and after the snowmelting operation is completed, the temperature of the outside air Depending on the conditions, the washing water is selectively sprayed to prevent corrosion of the steel panel, pump, and pipeline. By spraying compressed air through the pipe, the washing water in the pipe and the washing water on the roof surface are drained to have the function of preventing corrosion and freezing. it's about

Recently, abnormal climate phenomena are appearing all over the world due to the effect of global warming. Due to this abnormal climate phenomenon, heavy rains in summer and heavy snowfall in winter are causing various natural disasters.

In the past, when a significant amount of snow is loaded on the roof of a factory or industrial building mainly composed of steel frame and industrial buildings due to heavy snow in winter, it can cause the roof to collapse. Article 27- (A person who is the owner, occupant, or manager of a building and is responsible for the management of the building is responsible for managing the building, including sidewalks, back roads, pedestrian-only roads, and roofs of facilities (roofs of facilities prescribed by Presidential Decree) It is legally mandatory as indicated in the section).

However, in the existing snow removal equipment, when pure water is sprayed on the roof using groundwater or water supply pipe, the sprayed water melts the snow and removes the snow when the amount of snow is small. Rather, there was a problem that increased the load and caused the roof to collapse.

As a prior art for preventing this, as disclosed in Korean Patent Publication No. 10-1608905 "Roof Snow Removal Device" (registration date: March 29, 2016), a snow removal tank in which the snow removal agent is accommodated, and the snow removal tank A snow removal agent supply unit comprising a pump for pressurizing the contained snow removal agent, a snow removal agent supply pipe connected to the pump and supplying the snow removal agent to the stirring unit, a water tank accommodating water, and a snow removal agent by pressurizing the water contained in the water tank A water supply unit comprising a pump for supplying water to the supply pipe, a stirring unit installed between the snow removal agent supply pipe and the transfer unit to mix the snow removal agent and water, and a snow removal installed connected to the stirring unit and mixed with water in the stirring unit It is configured to include a conveying unit for transferring the agent and a spraying unit for spraying the snow removal agent supplied from the conveying unit onto the roof, wherein the spraying unit is piped to the upper part of the roof and fixed to the conveying part by one side of the injection supply pipe, and the injection supply pipe is installed It is configured to include a plurality of sprinklers and a plurality of pressure tanks provided at regular intervals in the injection supply pipe, and the sprinkler is provided with a drain to prevent freezing by discharging the snow removal agent remaining inside the sprinkler to the outside, , The transfer unit is characterized in that one end is installed connected to the stirring unit and the other end is composed of a pair of transfer tubes each coupled to both ends of the injection supply tube.

However, the snow remover mixed with water has a characteristic that it does not freeze even at about -30 ° C. Although it has a useful effect of preventing the collapse of there is.

In addition, if the snow removal solution remains while being sprayed through the pipe, there is a risk of freezing the pipe.

As another prior art related to the existing roof snow removal device, as disclosed in Korean Patent Publication No. 10-1758767 "Roof snow removal device for prefabricated panel buildings" (registration date: 2017.07.11), the inclined roof surface of prefabricated panel buildings a heating wire installed in a zigzag form in the lower area; a sensor unit installed on one side of the lower area of the roof surface to sense a load applied to the roof surface by falling snow; a control unit controlling the heating wire to melt snow falling on the lower area of the roof surface by operating the heating wire when the load sensed by the pressure sensor exceeds a preset load; a rainwater gutter installed along the lower end of the roof surface through which water generated by melting snow by the heating wire flows; a rainwater pipe installed vertically along the side wall of the prefabricated panel building, installed to be connected to the rainwater gutter, and discharging water flowing from the rainwater gutter to the outside; and a pair of transfer screws installed on the rainwater gutter to move the semi-frozen snowballs to the rainwater pipe side while crushing, wherein the roof surface is composed of a sandwich panel with mountains and troughs formed on the upper surface, and the a first pipe part formed along the top of the roof surface and connected to a compressor to receive compressed air; a plurality of second pipe parts installed at right angles from the first pipe part and spaced apart from each other by a predetermined distance and installed along the mountain formed in the upper region of the roof surface; A plurality of injection nozzles formed to protrude in both sides of each of the plurality of second pipe parts, the plurality of injection nozzles being installed to be spaced apart from each other at predetermined intervals along the longitudinal direction of each of the plurality of second pipe parts; further comprising, the plurality of injection nozzles Each is formed to be inclined toward the lower area of the roof surface, and snow falling to the upper area of the roof surface is moved to the lower area of the roof surface where the heating wire is installed by the compressed air sprayed from the injection nozzle and sits down. .

However, when it detects the snow load on the existing roof, and when it detects that the snow is over a certain load, compressed air is sprayed to move the snow to the area where the heating wire is installed, and then the heated wire is operated to remove the snow. Although the process of melting snow is carried out, if it snows continuously, the efficiency of melting a large amount of snow with the heat of the heating wire will decrease, and the energy consumption will increase to operate the heating wire for a long time, which will waste energy. There are concerns.

That is, when snowmelting liquid is used in the existing roof snow removal device, there is a risk of corrosion of steel frame lightweight panels and pipes due to the snowmelting liquid containing calcium chloride after the snow removal operation is completed, and there is a risk of wasting energy when using a hot wire.

Korean Patent Publication No. 10-1608905 "Roof Snow Removal Device" (Registration Date: March 29, 2016) Korean Patent Publication No. 10-1758767 "Roof snow removal device for prefabricated panel buildings" (Registration date: 2017.07.11)

The present invention was created to solve the above problems in consideration of the above problems, and its purpose is to melt the roof snowmelting operation of a factory or industrial company composed of a steel frame lightweight panel with a snowmelting liquid, and after the snowmelting operation is completed, the temperature condition of the outside air The washing water is selectively sprayed to prevent corrosion of the steel panel and pipe line according to the requirements. By spraying compressed air through the pipeline, it drains the washing water in the pipeline and the washing water on the roof surface to serve as both corrosion prevention and freeze protection. is to do

The present invention for achieving the above object is a snowmelting tank in which the snowmelting liquid is stored; a conduit serving as a supply path for pressurizing the snowmelting liquid of the snowmelting tank to the injection means provided on the roof side of the building by the pressure of the pump; a snowmelt valve which opens and closes a first branch pipe connected to the conduit side to select supply or cutoff of the snowmelt fluid supplied from the snowmelt tank to the pump side; Washing water supply means for supplying the washing water from the washing water tank to the spraying means through the pump and the pipe according to a signal from the control unit to prevent corrosion of the pipe and the roof by the snowmelt after the supply of the snowmelt is completed; compressed air supply means for supplying compressed air to the injection means through the pump and the pipeline according to a signal from the control unit to prevent freezing of the pipe and the pump by the washing water after the supply of the washing water is completed; an outdoor temperature measuring sensor installed on the outside of the roof to measure the outside air temperature, signal the measured information and output it to the control unit; a snow load measurement sensor for measuring a snow load of snow being deposited on the roof and outputting an electrical signal for the measured snow load to the control unit; and a control unit for selectively performing operations of snow melting, washing, and compressed air injection processes based on signals applied from the outdoor temperature measurement sensor and the snow load measurement sensor, wherein the control unit includes a first branch pipe during the snow melting process control to keep the washing water valve of the 2nd branch pipe and the compressed air valve of the 3rd branch pipe closed by opening the snow melt valve of It controls to maintain the state, and during the compressed air injection process, the compressed air valve is opened and the snow melt valve and the washing water valve are kept closed, and the control unit sets the reference temperature in the outside air temperature range of 3°C to 8°C. When the snow load measured by the snow load measuring sensor is measured below a certain value and the temperature of the outside air measured by the outdoor temperature measuring sensor reaches the reference temperature, the supply of the snowmelt pipe is cut off and the washing water The supply means is operated to control the supply of washing water to the injection means through the pump, and after the cleaning process is completed, the compressed air generated from the compressor is supplied through the third branch pipe, and the washing water remaining in the pump and the pipe is sprayed. It is characterized in that it controls to open the compressed air valve while the snow melt valve and the washing water valve are closed to push it toward the roof side through the

The washing water supply means includes a second branch pipe having one end connected to the pump and the other end connected to a washing water tank containing washing water, and a washing water valve for opening and closing the flow path of the second branch pipe according to a control signal from the control unit.

The compressed air supply means includes a third branch pipe having one end connected to the pump and the other end connected to the compressor, and a compressed air valve for opening and closing the flow path of the third branch pipe according to a control signal from the control unit.

The snowmelting liquid stored in the snowmelting tank is a liquid snowmelting liquid in which calcium chloride and water are mixed.

The present invention performs a snowmelting operation to melt snow by spraying a snowmelting liquid to remove snow accumulated on the roof of a factory or industrial enterprise, etc. composed of a steel frame lightweight panel, and due to the snowmelting liquid sprayed during the snowmelting operation, The washing operation is performed by spraying washing water to prevent corrosion of the roof, and after the washing of the washing water is completed, the washing water remaining in the roof or pipe is easily drained with compressed air, thereby preventing the freezing phenomenon of the snow-covered roof. In addition to the prevention, it has a useful advantage of preventing the freezing phenomenon of the pump and the pipeline.

In addition, the present invention allows the snowmelting liquid, washing water and compressed air to pass sequentially through one pump and a pipe, so that the processes of snowmelting, washing, and air spraying are linked with the injection means provided on the roof through the pump and the pipe. Since the sequential process is performed, malfunctions can be reduced, and the associated washing and air spraying equipment can be compacted, thereby reducing space restrictions.

In addition, the present invention allows the above-described processes such as snow melting, washing, and air spraying to be automatically performed in the control unit using a snow load measurement sensor and an outdoor temperature measurement sensor, so that the operator does not need to manually operate it, and it is automatically performed even in the absence of the operator. It has the useful advantage of being able to perform operations such as snow melting.

1 is a configuration diagram schematically showing the configuration of a roof snowmelting device equipped with a corrosion prevention and freeze protection function according to the present invention.
Fig. 2 is a block diagram showing the configuration of Fig. 1 in blocks;
Figure 3 is a state diagram showing the snow melting operation of the present invention.
Figure 4 is a state diagram showing the cleaning process of the present invention.
Figure 5 is a state diagram showing the compressed air injection process of the present invention.

In describing the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in the present invention, and may vary according to the intention or custom of the user. Therefore, the definition should be made based on the content throughout this specification. In addition, 'including' a certain component means that other components may be further included, rather than excluding other components, unless otherwise stated.

When the roof snowmelting apparatus having corrosion prevention and freeze protection function according to the present invention is described with reference to FIGS. 1 to 5, the snow melting operation of the roof 15 of the industrial or factory building 10 composed of a steel frame lightweight panel is performed with a snowmelting solution. After the snow melting operation is completed, the washing water is selectively sprayed to prevent corrosion of the steel panel and the corrosion of the pipe line 200 according to the temperature conditions of the outside air, It has a component for performing a process of spraying compressed air through the pipeline to prevent freezing and freezing of the pipeline and the steel panel by the washing water after completion.

The configuration of the present invention for performing the above process includes a snowmelting tank 100 in which the snowmelting liquid is stored; a conduit 200 serving as a supply path for pressurizing the snowmelting liquid of the snowmelting liquid tank 100 to the injection means 700 side provided on the roof 15 side of the building 10 by the pressure of the pump 150; The snowmelt valve 310 selects the supply or cutoff of the snowmelting fluid supplied from the snowmelting tank 100 to the pump 150 by opening and closing the first branch pipe 210 connected to the pipe 200 side. Wow; After the supply of the snowmelt liquid is completed, the pump 150 and the pipeline ( 200) and a washing water supply means for supplying to the injection means 700 side; After the supply of the washing water is completed, the injection means 700 through the pump 150 and the pipe 200 according to the signal of the control unit 400 to prevent freezing of the pipe 200 and the pump 150 by the washing water. Compressed air supply means for supplying compressed air to the side; an outdoor temperature measuring sensor 410 installed on the outside of the roof 15 to measure the outside air temperature, signal the measured information and output it to the control unit 400 side; a snow load measurement sensor 450 for measuring a snow load of the snow on the roof 15 and outputting an electrical signal for the measured snow load to the control unit 400 side; and a control unit 400 for selectively performing operations of snow melting, washing, and compressed air spraying processes based on signals applied from the outdoor temperature measuring sensor 410 and the snow load measuring sensor 450 .

1 and 2, the injection means 700 connected to the end of the conduit 200 and provided on the roof 15 is the lower roof 15 at a predetermined height close to the roof 15. It performs a function of spraying snowmelting liquid, washing water, or compressed air toward the direction, and a spray nozzle or a sprinkler may be adopted as an example.

The conduit 200 is configured in the form of a steel pipe, and functions as a flow path through which snowmelting liquid, washing water, and compressed air pass, and the first branch pipe 210 and the second branch pipe through the pump 150 The engine 220 and the third branch pipe 230 have a branched structure.

The snowmelting liquid is stored in the snowmelting liquid tank 100 in a liquid state in which a snowmelting agent (calcium chloride: CaCl2) and water are mixed.

The pump 150 is operated by the control signal of the control unit 400 to apply the pressure difference between the snowmelting liquid in the snowmelting liquid tank 100, the washing water of the washing water tank 500, and the compressed air of the compressor 600. It performs a function of pumping pressure to the pipe 200 side with the pumping pressure.

The washing water supply means is the pump 150 according to a signal from the control unit 400 to prevent corrosion of the pump 150, the pipeline 200, and the roof 15 by the snowmelt after the supply of the snowmelt is completed. and a second branch pipe 220 having one end connected to the pump 150 and the other end connected to the washing water tank 500 containing washing water so as to supply washing water to the spraying means 700 side through the pipe line 200 and , a washing water valve 320 for opening and closing the flow path of the second branch pipe 220 according to a control signal from the control unit 400 is provided.

The second branch pipe 220 supplies the washing water in the washing water tank 500 to the pipe line 200 through the pump 150 by the pumping force transmitted from the pump 150. will perform

The washing water valve 320 performs an opening/closing operation of a flow path in the second branch pipe 220 , and is disposed in a position close to a connection portion between the pipe line 200 and the second branch pipe 220 .

The compressed air supply means according to a signal from the control unit 400 to prevent freezing of the pipe line 200 and the pump 150 and freezing of the roof 15 by the washing water after the supply of the washing water is completed. ) and the conduit 200 to supply compressed air to the injection means 700 provided on the roof 15 side, and the washing water remaining in the inside of the pump 150 and the pipe line 200 to the roof through the injection means 700 (15) It performs the function of spraying to the side.

The compressed air supply means includes a third branch pipe 230 having one end connected to the pump 150 and the other end connected to the compressor 600 , and the third branch pipe 230 according to a control signal from the control unit 400 . ) and a compressed air valve 330 for opening and closing the flow path.

The third branch pipe 230 performs a function of a supply pipe for supplying the compressed air generated from the compressor 600 to the pump 150 side.

For this reason, it has the advantage of efficiently discharging the remaining washing water inside the pump 150 and the pipe line 200 to the outside through the injection means 700 using the compressed air.

The compressed air valve 330 performs a function of opening and closing the internal flow path of the third branch pipe 230 according to a control signal of the control unit 400 .

The control unit 400 sets the reference temperature in the temperature range of 3 to 8 ℃ of the outside air temperature measured by the outside air temperature measuring sensor 410, and the outside air temperature measured by the outside air temperature measuring sensor 410 is When the reference temperature is reached, the supply of the snowmelting liquid is cut off and the washing water supply means is operated to output a control signal for controlling the supply of washing water to the pipe 200 through the pump 150. it has become

Accordingly, the control unit 400 controls to selectively perform the operations of the snow melting, washing, and compressed air injection processes based on signals applied from the outdoor temperature measuring sensor 410 and the snow load measuring sensor 450 .

In addition, as shown in FIG. 2 , when a timer 420 is further provided, the control unit 400 may set operation cycles of snow melting, washing, and air spraying using the timer 420 .

The reference temperature is the control unit 400 by setting a specific temperature of 3 ℃ or more and 8 ℃ or less among the temperatures at which the snow of the roof 15 melts as the midday weather maintains the temperature of the image after snowing in the winter season. side can be set.

When the temperature of the outside air is less than 3 ℃, there is a risk that the snow accumulated on the roof 15 does not sufficiently melt and remain on the roof 15, and when it exceeds 8 ℃, there is a fear that the temperature during the winter may not rise, and the washing water There is a risk of missing the input timing.

[Snow melting process]

When snow accumulates on the roof 15 of the building 10, the snow load measurement sensor 450 provided on the roof 15 measures it, and the snow load measurement sensor 450 measures a value above a certain load. In this case, the snow load measurement sensor 450 outputs a signal to the control unit 400 side.

Next, as shown in FIG. 3 , the control unit 400 determines when snow melting is necessary based on the signal applied from the snow load measurement sensor 450 and outputs a control signal to drive the pump 150 . and the snow melt valve 310 is controlled in an on-state for an open operation.

The pump 150 pressurizes the snowmelting liquid in the snowmelting liquid tank 100 to the conduit 200 through the first branch pipe 210 .

The snowmelting liquid pumped into the pipeline 200 passes through the injection control valve 340 and is supplied to the injection means 700 provided on the upper side of the roof 15 , and then the injection nozzle or spring of the injection means 700 . As the snowmelt is ejected toward the cooler, a snowmelting operation is performed to melt the snow accumulated on the roof (15).

At this time, the control unit 400 controls the washing water valve 320 of the second branch pipe 220 and the compressed air valve 330 and the injection control valve 340 of the third branch pipe 230 to maintain a closed state. By doing so, to maintain a state of filling (supplying) only the snow melt in the inside of the pump 150 and the pipe 200.

[Cleaning process]

After the snow melting process is completed, the snow load measured by the snow load measuring sensor 450 is lowered to a certain value or less, and only when the signal measured by the outdoor temperature measuring sensor 410 or higher is applied together. The control unit 400 performs the cleaning process.

For example, after the snow accumulated on the roof 15 is subjected to a snow melting process by the snow load measuring sensor 450, the temperature of the outside air is below freezing in a state where the snow load of the snow accumulated on the roof 15 is temporarily lowered to a certain value or less. In this case, since the washing water may freeze and freeze the pipe 200 due to cold weather, it is preferable to limit the washing process to be performed while the temperature of the outside air from the outside temperature measuring sensor 410 has risen to the zero temperature. .

First, as shown in FIG. 4 , the control unit 400 stops the operation of the pump 150 after the snow melting process is completed, and turns off the snow melt valve 310 and the compressed air valve 330 to close it. As a control signal is output, the snowmelting liquid in the snowmelting liquid tank 100 is blocked from being supplied to the inside of the pump 150 through the first branch pipe 210 .

At this time, the snow melt valve 310 and the compressed air valve 330 are turned off to close, so that only the washing water is supplied in the conduit 200 .

Thereafter, when the control signal is output to the pump 150 and the washing water valve 320 in order to perform the washing process in the control unit 400, the pump 150 is driven and the washing water in the washing water tank 500 is removed. The pressure is fed to the second branch pipe 220, and as the washing water valve 320 is turned on to open, the washing water in the second branch pipe 220 is supplied to the inside of the pump 150 and the pipe line 200. The snow melt remaining in the inside of the pump 150 and the conduit 200 is pushed toward the spraying means 700 .

The washing water in the conduit 200 washes away the snow melt remaining on the surface of the roof 15 as it is sprayed toward the lower roof 15 through the spray means 700 provided on the roof 15, so that the roof 15 By draining it to the outside through the eaves, it has the advantage of preventing the roof 15 made of the steel pipe 200 and the steel frame lightweight panel from being corroded by the snowmelting liquid.

[Compressed air injection process]

During the washing process, when the snow load by the snow load measuring sensor 450 decreases to a certain value or less, and the outdoor air temperature measured by the outdoor temperature measuring sensor 410 reaches the reference temperature, the control unit 400 is cleaned After completing the process, the snow melt valve 310 and the washing water valve 320 are turned off.

Thereafter, as shown in FIG. 5 , when the control unit 400 turns on the compressed air valve 330 to open the snow melt valve 310 and the washing water valve 320 in a closed state, the The generated compressed air is supplied to the inside of the pump 150 and the inside of the pipe 200 through the third branch pipe 230 to spray the washing water remaining in the inside of the pump 150 and the pipe 200 . It is pushed toward the roof 15 side through 700 .

As shown in FIG. 5 , the compressed air sprays the washing water remaining in the pump 150 and the pipeline 200 toward the roof 15 through the spraying means 700 to the inside of the pump 150 and the As the washing water remaining in the pipe line 200 is drained, the freezing phenomenon in the pump 150 and the pipe line 200 caused by the washing water is prevented.

Therefore, the present invention performs a snow melting operation by spraying a snowmelting liquid to melt snow in order to remove the snow accumulated on the roof 15 of a factory 10 or an industrial company, etc. composed of a steel frame lightweight panel, and the melt sprayed during the snowmelting operation The washing operation is performed by spraying washing water to prevent corrosion of the steel pipe or roof due to snow fluid, and after the washing of the washing water is completed, the washing water remaining in the roof or pipe 200 is easily drained with compressed air. By doing so, it has a useful advantage of preventing the freezing phenomenon of the snow-covered roof 15 , and also preventing the freezing phenomenon of the pump 150 and the pipe 200 .

In addition, the present invention allows the snowmelting liquid, washing water, and compressed air to pass sequentially through one pump 150 and the pipeline 200, so that the process of snowmelting, washing, and compressed air injection is performed with the pump 150 and the pipeline ( 200) through the operation in conjunction with the injection means 700 provided on the roof to make a sequential process, so malfunctions can be reduced, and the associated washing and air injection equipment can be compacted, thereby reducing space restrictions. have

In addition, in the present invention, the processes such as snow melting, washing, and air spraying are automatically performed in the control unit 400 using the snow load measurement sensor 450 and the outdoor temperature measurement sensor 410, so that the operator manually operates them. It has a useful advantage of being able to automatically perform operations such as snow melting even in the absence of an operator without the need to do so.

As such, although specific embodiments have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention is not limited to the above-described embodiment, but should be defined by the claims and equivalents as well as the claims to be described later.

That is, the present invention described above is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains without departing from the gist of the present invention as claimed in the claims Of course, various modifications can be made, and such modifications are within the scope of the claims.

10: building 15: roof
100: snow melt tank 150: pump
200: pipeline 210: first branch pipe
220: second branch 230: third branch
310: snow melt valve 320: washing water valve
330: compressed air valve 400: control unit
410: outdoor temperature measuring sensor 420: timer
450: snow load measuring sensor 500: washing water tank
600: compressor 700: injection means

Claims (4)

a snowmelting tank 100 in which the snowmelting liquid is stored;
a pipe 200 serving as a supply path for pressurizing the snowmelting liquid of the snowmelting liquid tank 100 to the injection means 700 side provided on the roof 15 side of the building 10 by the pressure of the pump 150;
The snowmelt valve 310 selects the supply or cutoff of the snowmelting fluid supplied from the snowmelting tank 100 to the pump 150 by opening and closing the first branch pipe 210 connected to the pipe 200 side. Wow;
After the supply of the snowmelt liquid is completed, the pump 150 and the pipeline ( 200) and a washing water supply means for supplying to the injection means 700 side;
After the supply of the washing water is completed, the injection means 700 through the pump 150 and the pipe 200 according to the signal of the control unit 400 to prevent freezing of the pipe 200 and the pump 150 by the washing water. Compressed air supply means for supplying compressed air to the side;
an outdoor temperature measuring sensor 410 installed outside the roof 15 to measure the outside air temperature, signal the measured information, and output to the control unit 400 side;
a snow load measurement sensor 450 for measuring a snow load of the snow on the roof 15 and outputting an electrical signal for the measured snow load to the control unit 400 side; and
A control unit 400 for controlling selectively performing operations of snow melting, washing, and compressed air injection processes based on signals applied from the outdoor temperature measurement sensor 410 and the snow load measurement sensor 450;
The control unit 400 opens the snow melt valve 310 of the first branch pipe 210 during the snow melting process, and pressurized air of the washing water valve 320 of the second branch pipe 220 and the third branch pipe 230 . The valve 330 is controlled to maintain a closed state, and the washing water valve 320 is opened during the washing process, and the snow melt valve 310 and the compressed air valve 330 are controlled to maintain a closed state, and compressed air is sprayed. During the process, the compressed air valve 330 is opened and the snow melt valve 310 and the washing water valve 320 are controlled to maintain a closed state,
The control unit 400 sets a reference temperature in the outside air temperature range of 3°C to 8°C, the snow load measured by the snow load measurement sensor 450 is measured below a certain value, and the outdoor temperature measurement sensor 410 When the measured outside air temperature reaches the reference temperature, the supply of the snowmelting liquid pipe 200 is cut off and the washing water supply means is operated to supply the washing water to the spraying means 700 through the pump 150 After the cleaning process is completed, the compressed air generated from the compressor 600 is supplied through the third branch pipe 230, and the washing water remaining in the pump 150 and the pipe line 200 is sprayed by the injection means (700). A roof with a corrosion prevention and freeze protection function, characterized in that it controls to open the compressed air valve 330 in a state in which the snow melt valve 310 and the washing water valve 320 are closed to push it toward the roof 15 through the Device. The method according to claim 1,
The washing water supply means has a second branch pipe 220 connected at one end to the pump 150 and the other end to a washing water tank 500 containing washing water;
A roof snowmelting device having a corrosion prevention and freeze protection function, characterized in that it has a washing water valve 320 for opening and closing the flow path of the second branch pipe 220 according to a control signal from the control unit 400 . The method according to claim 1,
The compressed air supply means includes a third branch pipe 230 having one end connected to the pump 150 and the other end connected to the compressor 600,
A roof snow melting apparatus having a corrosion prevention and freeze protection function, characterized in that it has a compressed air valve (330) for opening and closing the flow path of the third branch pipe (230) according to a control signal of the control unit (400). The method according to claim 1,
The snowmelting liquid stored in the snowmelting tank 100 is a roof snowmelting device having a function of preventing corrosion and freezing, characterized in that it is a liquid snowmelting liquid in which calcium chloride and water are mixed.

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