JP7249019B2 - Snow protection device - Google Patents

Description

The present invention relates to a snow accumulation prevention device for the purpose of melting snow on a road surface and preventing snow accumulation, particularly in cold regions.

Falling temperatures in winter and frozen road surfaces due to snowfall cause traffic congestion and traffic accidents due to slippage. Even on the sidewalk, a fall may cause an unexpected injury. Particularly in Japan, in Hokkaido, mountainous areas, and heavy snowfall areas, low temperatures and heavy snowfall continue for a long period of time, requiring frequent snow removal operations.

For this reason, conventionally, the following devices have been used as countermeasures.
(1) Snow removal pipes (also known as “snow removal pipes” or “snow melting pipes”): Groundwater is sprayed onto the road surface through nozzles installed on the road from pipes embedded in the road to remove and melt snow, thereby preventing road surface freezing. It is a device that prevents
(2) Road heating: A device that heats the road surface with electric heating wires, hot water pipes, etc. embedded in the pavement of the roadway or sidewalk.

However, problems have been pointed out for each device. In other words, (1) it has been pointed out that the snow-melting pipe pumps up groundwater, which causes ground subsidence, and that it causes flooding of roads in places with poor drainage. In addition, there is a problem that it is difficult to apply in regions where the temperature is lower, such as Hokkaido and mountainous areas, because the snow-melting water itself freezes. As for (2), there are the problems of running costs for operation, the labor and expense of burying them in the pavement of roadways and sidewalks, and the problems of energy inefficiency due to heat generation in open spaces.

By the way, as a system for safely melting snow while suppressing running costs, a snow melting system by spraying water has been proposed as described in Patent Document 1. According to this document, the antifreeze liquid is weighed and mixed from a tank containing antifreeze liquid into a tank containing water, and the concentration-controlled antifreeze liquid is sent to the roof by a pressure pump, sprinkled with water, melted, and sprinkled with water. discloses a sprinkler snow melting system that is collected and circulated by rain gutters. In addition, the applicant of the present application has good energy efficiency compared to road heating, and by specifying the optimum flow rate and timing even under various weather conditions, it is possible to maintain a good concentration of the antifreeze liquid. We previously proposed an anti-freeze liquid circulation device described in Patent Document 2, which is capable of preventing snow from accumulating on the road surface while keeping the load low. That is, a first tank for storing the antifreezing agent undiluted solution, a second tank for storing the antifreezing liquid, and a first pump for transferring the antifreezing agent undiluted solution from the first tank to the second tank. and a recovery unit for recovering the supplied antifreeze liquid, and a second pump for transferring the recovered antifreeze liquid from the recovery unit to the second tank, wherein the target area is transferred from the second tank to the target area. a valve for switching on/off the supply of anti-freezing liquid to the recovery section and a valve for switching between allowing/stopping the inflow of anti-freezing liquid that has passed through the target area to the recovery section.

JP 2007-278054 JP 2018-188915

However, in the invention described in Patent Document 1, it is necessary to manually operate/stop the system without detecting the state of precipitation, accumulated snow, or frozen state. Therefore, a large amount of antifreeze raw material is required to maintain the concentration of the circulated antifreeze, and the amount of the circulated antifreeze itself continues to expand due to the mixing of the snowmelt water. When overflow occurs at any timing, high-concentration chloride will flow out to the external environment, and the cost of the antifreeze raw material and the environmental load are large. Moreover, since the snowfall state is not managed in the first place, there is a problem that it does not contribute to the prevention of snow accumulation.

Further, according to the anti-freezing liquid circulation device of Patent Document 2, it has become possible to reduce the environmental burden at low cost and with good energy efficiency by appropriately performing concentration control. However, the applicant of the present application has made further studies to realize cost reduction to the extent that it can be substituted for road heating using a general heat source.

That is, it is an object of the present invention to provide a snow accumulation prevention device capable of preventing the accumulation of snow on the road surface, which is more energy efficient and has a cost advantage compared to road heating. be.

In order to solve the above problems, the snow accumulation prevention device according to the present invention has the following features. That is, the snow cover prevention device according to the present invention includes a snowfall sensor that detects the snowfall state of a target area, a first tank that prepares antifreezing liquid to be supplied to the target area, and a first tank that supplies the antifreezing liquid to the target area. a pressure feed pump that supplies the antifreeze liquid, a sorting valve that switches circulation and discharge of the liquid recovered from the target area, a second tank that stores the liquid circulated through the sorting valve, and the second a pump for supplying the liquid stored in the tank to the first tank, the first tank having a stirring mechanism, and stirring the solid antifreeze in the solvent to prepare the antifreeze. , the first tank is equipped with a first water level sensor and the second tank is equipped with a second water level sensor, respectively, and the water level of each tank detected by the first sensor and the second sensor is pumped It is characterized in that the operation of the pump and the pumping pump and the switching of the distribution valve are controlled (Claim 1).

With such a configuration, the antifreezing liquid in which the solid antifreezing agent is dissolved can be supplied to the target area, snow accumulation can be prevented at a low cost , and the circulating liquid can be smoothly supplied. . It should be noted that the solid antifreeze agent can be configured to always be abundantly supplied to the first tank (Claim 2). Alternatively, a heater may be provided in the first tank (Claim 3). With such a configuration, a supersaturated antifreeze solution can be prepared, so that a high-concentration antifreeze solution can be supplied to the target area, and snow accumulation can be appropriately prevented. "Always abundantly supply solid antifreeze to the first tank" means that the amount of antifreeze that exceeds the saturation state within a predetermined temperature range based on the amount of liquid that can circulate in this snow protection device is the first tank. It means that the antifreeze agent is supplied into the tank, and the antifreeze agent may remain undissolved in the first tank. method can be adopted.

Further, it is possible to control the operation of the compressing pump and the pumping pump and the switching of the distribution valve depending on whether or not the snowfall sensor senses the state of snowfall. In this case, when the snowfall state is detected by the snowfall sensor, the on-control of the pressure feed pump may be performed with a predetermined time delay. It is also possible to perform off control of the compressing pump with a time delay (claims 4 to 6). With such a configuration, it becomes possible to supply the antifreezing liquid in a timely manner according to the state of snowfall. By delaying the turn-on control of the pressure feed pump for a predetermined time, for example, 60 seconds, the antifreezing liquid is supplied after the sorting valve is reliably circulated, eliminating the need for a high-concentration antifreezing liquid. external outflow can be avoided. Also, even if it is detected that the snow is not falling, it is possible to delay the off-control of the pumping pump for a predetermined time so as to completely melt the snow on the road surface.

In addition, by configuring the switch control of the distribution valve to drain with a predetermined time delay from the off control of the pressure feed pump, the antifreezing liquid supplied to the target area can be reliably collected ( Claim 7). The predetermined time referred to here corresponds to the average time required for the antifreeze liquid to be supplied to the target area, collected at the end, and passed through the sorting valve. For example, about 10 minutes is assumed, although it depends on the installation environment of the snow cover prevention device.

The first tank is configured to be separated into two chambers by a partition wall, and the partition wall is provided with supply means for irreversibly supplying the antifreezing liquid prepared from the first chamber to the second chamber. You may constitute (Claim 9). As a supply means for irreversible supply, for example, a check valve is provided on the partition separating the two chambers, or the two chambers are configured so that the water levels are different, and when the water level in the first chamber exceeds a predetermined level, It may be structured to flow into the second chamber. By adopting such a configuration, it is possible to prevent the undissolved solid antifreeze agent from being supplied to the target area as it is, or the solid antifreeze agent remaining in the circulation path and causing a failure. can.

According to the snow protection device according to the present invention, it is possible to supply the anti-freezing liquid in which the solid anti-freezing agent is dissolved to the target area, and the load heating using the heat source and the use of the liquid anti-freezing agent Snow accumulation can be prevented at a significantly lower cost and a smooth supply of circulating liquid is possible . In addition, by recovering and reusing the antifreezing liquid in which the solid antifreezing agent is once supplied to the target area, it is possible to reduce the discharge of chlorides to the environment, thereby reducing the burden on the environment.

In the circulation control of the anti-freezing liquid, delay processing is performed when controlling each device (pump and sorting valve) in order to increase the efficiency of using the circulating liquid based on the information of sensing whether it is snowing or not. By intervening, it was possible to improve stable operability by simplifying control.

[Definition of terms]
In the present invention, the (1) "target area" is assumed to be a road surface or a road surface on which blocks are laid, and the material and properties of pavement or laying are not limited. In order to properly circulate the anti-freezing liquid, it is desirable that there is an inclination from the supply starting point, which is upstream, toward the downstream.
(2) "Snowfall" refers to the accumulation of snow on the ground, but in relation to the object of the present invention, the snowfall to be prevented includes a wide range of snow that may remain on the road surface and freeze. be
(3) As the "anti-freezing agent", calcium chloride, sodium chloride, magnesium chloride, calcium carbonate, calcium acetate, magnesium acetate, urea, etc., which are permissible according to the road surface, climate and environment can be appropriately adopted. . In addition, in the snow protection device according to the present invention, the solid antifreeze agent is dissolved in a supersaturated state and is supplied to the target area. With such a configuration, the running cost can be reduced as compared with the case of using a liquid antifreeze agent. The supply of antifreeze liquid to the target area is controlled by ON/OFF of the pump. When the compressing pump is turned on, the antifreeze solution flows out from the collection tank to the target area from the supply start point located above the target area.

(4) As the "stirring mechanism", since the solution does not have a particular viscosity, it is possible to employ stirring blades of an appropriate shape, such as propeller blades and inclined paddle blades. A baffle may be provided on the chamber wall in order to improve mixing of the upper and lower liquids.
(5) Various devices can be used as the "water level sensor", but typically by providing a plurality of electrodes for detecting the water level in the tank, the volume can be detected in multiple stages.
(6) It is desirable for the "snowfall sensor" to be able to directly detect the presence or absence of snowfall, but the phenomenon called "precipitation" is classified in various ways, and it is difficult to detect it in a unique way. Therefore, in relation to the object, the present invention uses two types of parameter detection, namely, a temperature sensor that detects the outside air temperature and a video monitor that detects precipitation by detecting an object that continuously moves vertically within the target area. Precipitation conditions can be sensed. Specifically, when the temperature is 5°C or less and an object moving in a specified vertical direction is detected every minute, it is determined that it is snowing (=detects snowfall), and either temperature or object detection is detected. If there is no snowfall, it is determined that the snowfall state is "no" (=the snowfall state is not sensed).
(7) In addition, as the configuration of the "dust removal tank", there is a first measure (mud pool) into which the liquid that has passed through the target area flows in through a groove portion that receives the liquid at the end of the region, and the liquid overflows from the first measure. It is possible to combine a plurality of cells of the second cell that serves as a receiving tray for the With such a configuration, dust and sludge can be removed.

1 is a block diagram showing the configuration of a snow cover prevention device according to one embodiment of the present invention; FIG. 4 is a flow showing the flow of control of the snow cover prevention device according to one embodiment of the present invention; This is a subroutine showing the flow of fully automatic processing. This subroutine shows the flow of forced processing. 4 is a subroutine showing the flow of timeout processing of the delay timer of each device; This is a subroutine showing the control flow of each pump according to the water level of each tank. It is a subroutine showing the control flow of the sorting valve according to the water level of the dust removal tank. FIG. 11 is a screen image diagram of a status information screen by an application; FIG. 10 is a screen image diagram of a state monitoring and operation screen by an application;

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

[1] Description of each configuration of the device [1-1] Description of the entire device FIG. 1 is a block diagram showing the configuration of a snow accumulation prevention device according to one embodiment of the present invention. White arrows indicate the direction of flow of the antifreeze liquid circulating through the snow protection device. The dashed arrows represent the transmission of sensed data and the transmission of active/deactivated signals. In order to prevent snow accumulation on the roadbed R during snowfall, the snow cover prevention device 1 includes a first tank 10, a storage container 20 for storing a solid antifreeze agent to be supplied to the first tank 10, and a pumping pump 30 upstream of the roadbed R. Prepare for. Further, downstream of the roadbed R, a collection gutter 40, a three-way valve (distribution valve) 50, a second tank 60, and a pumping pump 70 are provided. Here, the terms "upstream" and "downstream" respectively refer to both ends where the liquid is supplied and recovered when the antifreezing liquid is supplied to the roadbed R. The circulating anti-freezing liquid is returned to the first tank 10 again by the operation of the pumping pump 70 . Snow accumulation is prevented by controlling the supply of an antifreezing liquid obtained by dissolving a solid antifreezing agent with the roadbed R as the target area. The snow cover prevention device 1 also includes a snowfall sensor 80 to monitor weather conditions on the roadbed R and the space above it. The control panel 90 controls the operation/stopping and opening/closing of each pump (compressing pump 30, pumping pump 70) and the distribution valve 50 based on input information from each sensor.

[1-2] Configuration of supply of antifreezing liquid Next, preparation of the antifreezing liquid to be supplied and supply to the roadbed R will be described. In this embodiment, the first tank 10 has a two-chamber structure of a recovery/liquid preparation section 12 and a liquid transfer section 14 . A stirring mechanism (not shown) and a heater (not shown) are provided in the recovery/liquid preparation section 12 . The solid antifreeze stored in the reservoir 20 is always sufficiently supplied to the extent that it does not interfere with stirring. Any method of supplying the antifreezing agent is acceptable. In the snow protection device 1 according to this embodiment, concentration control of the circulating antifreezing liquid is not performed. Solid cryoprotectant may be manually or automatically supplied to the recovery and liquid preparation unit 12 on a regular or irregular basis. A sufficient supply of antifreeze is stirred by a stirring mechanism to prepare a saturated antifreeze. When the heater is operated, the saturated solubility increases, so that antifreeze liquid with a higher concentration can be prepared.

The recovery/liquid preparation section 12 and the liquid transfer section 14 are connected via a partition wall 16 . The saturated antifreeze liquid prepared in the recovery/liquid preparation unit 12 is irreversibly supplied to the liquid sending unit 14 . Any method can be adopted as the irreversible supply means.

In addition, the first tank 10 is provided with a first water level sensor 18, and the operation/stop (on/off) of the compressing pump 30, the distribution valve 50, and the pumping pump 70 is controlled according to the change in the water level. . The details will be described later.

[1-3] Anti-freezing liquid supply to roadbed R The anti-freezing liquid stored in the liquid feeding unit 14 (first tank 10) is supplied to the roadbed R by operating the pumping pump 30 . In this embodiment, the roadbed R has a gentle slope from the supply start point toward the recovery side ditch 40 . Therefore, the supplied anti-freezing liquid is collected in the collection gutter 40 together with the water content of snowfall and accumulated snow.

[1-4] Antifreeze liquid recovery/disposal configuration The antifreeze liquid that has reached the recovery gutter 40 and the melted snow water (hereinafter sometimes referred to as "melted liquid") It is collected in the tank 60 or discharged to the outside. The allocation control will be described later. The second tank 60 can be configured as a combination of a plurality of chambers, a first chamber (mud chamber) into which the molten liquid flows, and a second chamber serving as a catcher for the liquid overflowing from the first chamber. By combining a plurality of troughs, foreign matter (solid matter such as sand, mud, garbage, dead leaves, etc.) contained in the inflowing liquid can be sedimented in the first trough, and only the liquid portion can be maintained in the circulation path. As long as the container has the most sufficient capacity, a single container may have both functions of settling foreign matter and supplying clear liquid. The melt collected in the second tank 60 is supplied to the first tank 10 by operating the pumping pump 70 . As a result, the antifreezing liquid supplied to the roadbed R is circulated.

In addition, the second tank 60 is provided with a second water level sensor 62, which operates/stops (on/off) the compressing pump 30 and the pumping pump 70, and switches the mode of the sorting valve 50 ( circulation/exhaust) is controlled. The details will be described later.

[1-5] Detailed description of snowfall sensor (convenient snowfall determination)
Next, the snowfall sensor 80 will be described. The snowfall sensor 80 includes an outside air temperature sensor 81 and a camera 82 . An outside air temperature sensor 81 detects the temperature of the measurement area. The video monitor 82 detects the presence or absence of an object passing through the screen in the vertical direction. While the purpose of the snow accumulation prevention device according to the present invention is to prevent snow accumulation, the likelihood of snow accumulation varies depending on whether the type of precipitation is rain or snow and the outside temperature. Also, what should be monitored mainly is whether or not there is a risk of snow accumulation, and it is not necessary to judge strictly whether the precipitation is rain or snow (i.e., how frozen the precipitation is). .

Therefore, in this embodiment, when it is detected that the outside air temperature is less than 5° C. and that there is a vertically passing object, it is determined that "snow is falling", and otherwise, it is determined that "snow is not falling". Based on the result of this determination, on/off of the compressing pump 30 and the pumping pump 70 and mode control of the distribution valve 50 are performed as will be described later.

[2] Control Flow of Each Pump and Distributing Valve Next, the control flow of each pump (compressing pump 30, pumping pump 70) and distributing valve 50 will be described with reference to FIGS.

[2-1] Main Flow FIG. 2 shows the main flow of the snow protection device according to this embodiment. First, the operation mode and the mode of the distribution valve 50 are initialized as initial processing (step S202). Next, increment processing is performed for the distribution valve 50, the compressing pump 30, the pumping pump 70, and the delay timer of each element (step S204). Next, a state acquisition process for each element is performed (step S206). Specifically, the state of the distribution valve 50 (circulation mode/drainage mode), the outside temperature from the temperature sensor 81, the snowfall state from the camera 82, the operation status (stopped / during operation) and status (normal/abnormal), the first water level sensor 18 and the second water level sensor 62 acquire information such as respective water level values. Although not shown in FIG. 1, a sensor for sensing the flow rate of the liquid supplied to the roadbed R by the pumping pump 30 and the flow rate pumped from the second tank 60 to the first tank 10 by the pumping pump 70 is provided, and information about these is provided. can also be configured to obtain

Next, ON/OFF or mode switching of each pump and distribution valve 50 and setting of the delay timer are performed as processing according to the current operation mode (steps S208, S210, S212). The details will be described later.

Subsequently, timer status processing of each element is performed (step S214). That is, the ON/OFF delay timer of each element is monitored for timeout, and when it is determined that the timeout has occurred, each ON/OFF (or mode switching) control is performed. The details will be described later.

Next, control processing of each pump (compressing pump 30, pumping pump 70) based on the water levels of the first tank 10 and the second tank 60 is performed (step S216). This control process is a process for controlling the amount of liquid stored in each tank to an appropriate amount. When the water level in the first tank 10 exceeds the upper limit while the pressure pump 30 is turned off to temporarily stop, the pumping pump 70 is turned off to temporarily stop pumping from the second tank 60.例文帳に追加The details will be described later.

Next, control processing of the distribution valve 50 based on the water level is performed (step S218). This is to forcibly switch the mode of the sorting valve 50 according to the water level of the second tank 60, the details of which will be described later.

After that, update processing is performed for each piece of acquired information (step S220). Convert the obtained flow rate and power consumption to minutes. This information processing is performed to obtain a log for confirming the proper operating status of the snow cover prevention device 1 according to this embodiment, and is not used as a trigger for the control of each element itself, but the server 100 as information that contributes to status monitoring in the application on the terminal device 110 . In addition, when the operating conditions are remotely monitored, it is possible to monitor whether the situation has reached the point where the fully automatic processing should be switched to the forced processing.

Next, input/output processing from the outside is performed for each element (step S222). Specifically, ON/OFF or mode switching of each element is performed according to the presence or absence of ON/OFF or mode update processing for each element and the presence or absence of control timer timeout. After that, the data from each sensor and the operating state of each element are acquired and stored (step S224), and the process returns to step S204.

[2-2] Fully Automatic Processing Next, the flow of fully automatic processing will be described. In this processing mode, the operating state of each element is controlled or a delay timer is set according to the presence/absence of snowfall, the operating state of each element, and the water level of each tank.

First, the presence or absence of snowfall is determined based on information from the snowfall sensor 80 (step S302). If it is determined that there is snowfall, then it is determined whether or not the conditions for activating the ON delay timer of the compressing pump 30 are satisfied (steps S304, S306, S308, S310). Specifically, on the premise that the pressure pump 30 is currently OFF, the water level of the first tank 10 is equal to or higher than the lower limit water level (for example, 20 cm), and if the pressure pump ON delay timer is not operating at this time, the pressure pump The ON delay timer is started, and the switch delay timer to the diverting valve drain mode is stopped. This pressure-feeding pump ON delay timer takes into account the time lag until the distribution valve 50 switches to the circulation mode. Although the delay time depends on the area and shape of the roadbed R, it is assumed here to be 60 seconds.

Next, it is determined whether the conditions for ON control of the pumping pump 70 are satisfied (steps S312, S314, S316, S318). Specifically, on the premise that the pumping pump 70 is currently OFF, the water level of the first tank 10 is less than the threshold (85 cm in this embodiment), and the water level of the second tank 60 is less than the threshold (in this embodiment 40 cm) or more, the pumping pump 70 is turned on and the supply of the melt from the second tank 60 to the first tank 10 is started.

Next, when the mode of the distribution valve 50 is the drainage mode, a process of switching to the circulation mode is performed (steps S320, S322).

If it is determined that there is no snowfall (step S302: none), the OFF delay timer of each pump is set on the condition that each pump is in operation and the OFF delay timer has not already started (step S324, S326, S328, S330). By setting an OFF delay timer for the pump 30, there is time to allow the snow on the road surface to completely melt after the snow has stopped. In this embodiment, it is 30 seconds. Also, the OFF delay timer of the pumping pump 70 is intended to provide a buffer for the supply amount since the water level in the first tank 10 may fluctuate due to the pump operation. In this embodiment, it is 10 seconds.

[2-3] Forced processing On the other hand, if manual forced processing is required for some reason such as heavy snowfall or sensor failure, each pump is operated by switching to the forced processing mode from the terminal device 110, and the roadbed R freezes. Preventive liquid can be supplied. When the compressing pump 30 is OFF and the water level in the first tank 10 is equal to or higher than the lower limit water level, the compressing pump 30 is immediately turned ON without intervention of a delay timer (steps S402, S404, S406). When the drawing pump 70 is OFF, the first tank 10 is below the threshold water level and the second tank 60 is above the threshold water level, the drawing pump 70 is turned ON (steps S408, S410, S412, S414).

[2-4] Timer status processing of each device FIG. 5 shows the control flow of each delay timer regarding ON/OFF of each pump (compression pump 30, pumping pump 70) and switching of the sorting valve 50 to the drainage mode. It is a thing. The operating states of the compressing pump 30 (steps S502, S504, S506, S508), the pumping pump 70 (steps S510, S512, S514, S516), and the distribution valve 50 (steps S518, S520) are sequentially switched. When the pressure-feeding pump 30 OFF delay timer times out (step S506: Yes), the pressure-feeding pump OFF delay timer is stopped, the pressure-feeding pump 30 is turned OFF, and the sorting valve 50 is switched to the drain mode. Activation processing of the switching delay timer is performed (step S508). This takes into account the time it takes for the anti-freezing liquid, etc. flowing on the roadbed R to be collected in the second tank 60 after the force pump 30 is turned off, and is set to 10 minutes in this embodiment. .

[2-5] Control of Each Pump Based on Water Level Next, the control flow of each pump based on the water level of each tank will be described with reference to FIG. Assuming that either the compressing pump 30 or the pumping pump 70 is ON (step S602: Yes), the water level of each tank is controlled so as not to exceed the upper and lower limits. Specifically, when the water level in the first tank 10 is less than the lower limit water level (here, 20 cm), the pressure feed pump 30 is turned off to stop the outflow from the first tank 10 . On the other hand, when the water level in the first tank 10 is equal to or higher than the upper limit water level (here, 100 cm), the drawing pump 70 is turned off to stop the flow into the first tank 10 . Moreover, when the water level of the second tank 60 is less than the minimum water level (here, 20 cm), the drawing pump 70 is turned off to stop the outflow from the second tank 60 .

[2-6] Sorting Valve Control Based on Water Level Next, the control flow of the sorting valve 50 based on the water level of the second tank 60 will be described with reference to FIG. When the distribution valve 50 is in the circulation mode, the melted liquid collected in the second tank 60 flows into the second tank 60, and when it is in the discharge mode, it does not flow. When the current sorting valve 50 is in the drainage mode (step S702: Yes), when the water level of the second tank 60 is less than the threshold water level (40 cm) (step S704: Yes), the sorting valve 50 switches to the circulation mode. (step S706). On the other hand, if the current sorting valve 50 is in the circulation mode (step S708: Yes), the water level of the second tank 60 is equal to or higher than the upper limit water level (here, 60 cm) (step S710: Yes), the sorting valve 50 is in the drainage mode. (step S712).

[3] Monitoring and Control by Application Next, the monitoring and control of the snow protection device 1 according to this embodiment via the terminal device 110 will be described with reference to FIGS. 8 and 9. FIG. Information acquired from each sensor and element that configures the snow protection device 1 can be checked on an application that is pre-installed in the terminal device 110 via the control panel 90 and the server 100 . FIG. 8 is an image diagram of the terminal device 110 displaying the temperature, the number of snowfalls, the water level data of each tank, and the operation status of each element obtained from each sensor on the terminal device 110 by an application. Displaying real-time or minute-updated data at all times allows the user to monitor operating conditions even at remote locations.

FIG. 9 is an image diagram showing the operation status of each element and the presence/absence of an abnormality displayed on the screen. The status of each element obtained in the flow shown in FIG. 2 is displayed, and when the user wants to switch the operation mode, the user can switch the operation mode displayed on the terminal device 110 by operating the switch on the screen. can be done.

1 Snow protection device 10 First tank 12 Recovery/liquid preparation unit (first chamber)
14 Liquid sending unit (second chamber)
16 partition wall 18 first water level sensor 20 storage 30 pressure feed pump 40 collection gutter 50 distribution valve 60 second tank 62 second water level sensor 70 pumping pump 80 snowfall sensor 81 temperature sensor 82 camera 90 control panel 100 server 110 terminal device

Claims (8)

a snowfall sensor that senses snowfall conditions in a target area;
a first tank for preparing an antifreezing liquid to be supplied to the target area; and a pumping pump for supplying the antifreezing liquid prepared from the first tank to the target area;
a sorting valve that switches circulation and discharge of the liquid collected from the target area;
a second tank that stores the liquid circulated through the sorting valve;
and a pump for supplying the liquid stored in the second tank to the first tank. Prepare an antifreeze solution by stirring,
A first water level sensor is provided in the first tank, and a second water level sensor is provided in the second tank, respectively. A snow accumulation prevention device characterized by controlling the operation of the pumping pump and the pumping pump and the switching of the distribution valve . 2. A snow protection device according to claim 1, characterized in that said solid antifreeze agent is constantly supplied abundantly. 3. The snow cover prevention device according to claim 1, wherein a heater is provided in said first tank. 4. The system according to any one of claims 1 to 3, wherein operation of said compressing pump and said pumping pump and switching of said distribution valve are controlled depending on whether or not said snowfall sensor senses a snowfall state. Snow protection device. 5. The snow cover prevention device according to claim 4, wherein when the snowfall sensor senses a snowfall state, the pressure feed pump is turned on with a delay of a predetermined time. 6. The snow accumulation prevention device according to claim 4, wherein when the snowfall state is not detected by the snowfall sensor, off-control of the compressing pump is performed with a predetermined time delay. 7. The snow accumulation prevention device according to any one of claims 4 to 6, wherein switching control of said distribution valve to drain is delayed by a predetermined time from control of turning off said compressing pump. The first tank is provided with a partition wall,
It is separated into two chambers: 1) a first chamber for preparing an antifreeze liquid, and 2) a second chamber for storing an antifreeze liquid pumped by a pumping pump. 8. A snow protection device as claimed in any one of claims 1 to 7 , characterized in that supply means are provided for irreversibly supplying the prepared antifreeze liquid to the chamber.

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