JP3076493U - Microwave snow melting equipment - Google Patents

Abstract

(57) [Summary] (with correction) [Problem] To provide a snow melting apparatus which is inexpensive in operation cost, has a large energy saving effect, and is easy to operate and manage. A circulating medium liquid obtained by mixing an acrylamide / acrylic acid polymer mainly composed of an anionic emulsion polymer having a heat resistance of about 200 degrees with water, and mixing an antifreeze liquid with a medium liquid in a high-viscosity colloidal state. A hot water tank in which the circulating medium liquid temporarily accumulates in the middle of the piping that circulates the water, and a microwave generator provided at the top of the hot water tank, which is connected to a microwave through a temperature sensor that detects the temperature of the circulating medium liquid in the hot water tank The temperature sensing switch for automatically controlling the start and stop of the generator is operated to directly irradiate microwaves to the circulating medium liquid stored in the hot water tank to heat. The start and stop of the circulating pump are automatically operated via a snowfall sensor and a medium liquid temperature sensor installed in a snowmelt radiating pipe to forcibly circulate the circulating medium liquid under pressure.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 According to the present invention, the high-viscosity medium liquid according to the present invention is a translucent liquid having an external appearance, anionicity is anionic, and PH is 8.4 in a 1% solution. The heat resistance is about 200 degrees. Since this medium liquid has a fast heating rate and a slow decrease in cooling temperature, it is a snow melting technology that circulates a high-viscosity heat medium for the purpose of reducing the cost of electric heating operation using microwaves. It is possible to reduce the maintenance labor cost without the labor of transporting the work and the lubrication, and the microwave snow melting that combines the circulating liquid of high viscous heat medium and microwave irradiation for the purpose of energy saving in the technical field of snow melting. Is the way.

[0002]

[Prior art]

 For people living in snowy and cold regions, snow removal and snow removal is hard work for the citizens, especially for the elderly. Automating snowmelt will be an indispensable technology with the aging of the population in the future, and will be a major issue in terms of operating costs. In the technical field of snow melting, water spouting melts snow by using groundwater to blow water out of pipes buried on the road surface. A non-sprinkling snowmelt system in which a radiator tube is buried in the required part of the snowmelt, circulates the heat medium liquid heated by a boiler, solar collector, etc., and uses this thermal energy to melt the snow. Electric wire melting snow that heats an electric resistor and uses it to melt snow. An electric heating tube with a high thermal conductivity, a metal capillary wick is lined inside a metal tube, and the inside is evacuated and filled with a small amount of water, chlorofluorocarbon, ammonia, etc. Is snow melting by a heat pipe that evaporates and moves to the agglomerated part. There is a method of providing snow injection holes in the snowmelt ditch or underground, carrying snow into the holes, directly fountain heated with snow, or irradiating microwaves directly to the snow to melt snow. However, many of these snowmelt facilities have a high electricity bill in the snowmelt area, especially in heavy snowfall areas, because the method using a hot wire uses a large amount of electricity, and the boiler heats to a temperature that can melt snow. Until the medium, the pipes that circulate the medium inside the boiler must be heated, and the associated fuel cost and fuel injection work are indispensable. In the present invention, the method of circulating the medium liquid is the same as the boiler method, but unlike the boiler, no fuel is injected at all. In particular, snowmelt points at locations far from the city, such as entrances and exits of tunnels in mountainous areas and highways, use a road heater method with a heating wire rather than a boiler method because of the burden of fuel transportation and lubrication. Used in the fee. In addition, the snow melting method using a solar heat collector, which incorporates natural energy and has a low running cost, does not work at all in snowfall in heavy snowfall areas, and the collectors are damaged or broken down by the weight of snowfall. At present, it is not generally used. Also, the problem of land subsidence due to the pumping of groundwater for snow removal is one of the typical pollutions.In Minami-Uonuma-gun, Niigata prefecture, the pumping of groundwater for snow removal has recently been considered a cause. It has become a major social problem, with the settlement amount of about 30 centimeters. Furthermore, recently, a snow injection hole has been established underground to melt snow by directly injecting hot water into the snow that has been thrown, or by directly irradiating microwaves to the snow that has been thrown, In this method, transporting snow is very hard work for the elderly, and especially for bedridden elderly people, snow is thrown up to the snow hole and snow ditch. It is impossible to transport. However, they are living with a sense of danger due to the weight of the snow piled up around the house and the snow piled up on the roof. As described above, conventional snow melting facilities have various problems, such as cost problems and work efficiency, especially for people living in heavy snowfall areas due to the problem of snow removal and snow removal for elderly people, which will increase in the future. Snow melting and snow melting methods cannot be said to be sufficient technologies, and there is a need for further new technology development in the snow melting field, including automation including low cost.

[0003]

[Problems to be solved by the invention]

 The present invention irradiates microwaves to a high-viscosity heat medium liquid that has not been used for conventional snow melting and snow removal, circulates the snow melting pipe laid at an appropriate depth underground, and removes the snow around the snow melting pipe. This is a method of melting automatically, and the heating medium liquid used in the claims of the present invention can be heated in a shorter time and has a lower circulation temperature lowering rate than the conventional heating medium liquid. This method is also cheaper than the conventional circulating snow melting method, so the effect of energy saving is great. Also, since the operation and stop of circulation of the heat medium and the temperature adjustment of the medium can be automatically controlled, and the automatic snow melting method without water spraying, operation management is especially important for the elderly. It is easy, does not require the labor to remove snow and removes snow, the operation cost is low, and unlike a conventional boiler, only a combination of a magnetron generator, a tank for receiving the medium circulating fluid, and a circulation pump is required. It can be installed even in a small place, it is a reasonable snow melting method that requires no lubrication and easy maintenance.

[0004]

[Means to solve the problem]

 The heating medium used in the present invention is a mixture of acrylamide / acrylic acid mainly composed of an anionic emulsion type polymer mixed with an antifreeze such as an aqueous solution of ethylene glycol, aqueous propylene glycol, or aqueous solution of polyglycol. Since the antifreeze is mixed with the medium circulating liquid of the high-viscosity liquid, it is a medium liquid that does not freeze. The acrylamide / acrylic acid copolymer liquid has a heat resistance of about 200 degrees Celsius and a PH value of 1% solution. 8.4, which is also within the range of drinking water quality standards, and there is no danger to microwave irradiation even from microwave irradiation heating experiments. Acrylamide / acrylic acid containing the anionic emulsion type polymer as a main component has already been used for drilling technology such as oil drilling and well hot spring drilling, and is used as a highly viscous liquid to raise drilling dust to the ground. ing. Since the constant volume specific heat of this highly viscous medium liquid is smaller than that of Shimizu, the temperature rise by microwave is much faster than that of Shimizu, and the cooling rate of the heated temperature is slower than that of Shimizu. Therefore, the temperature of the liquid flowing through the snow-melting pipe has a low cooling rate, and the temperature difference between the circulating liquid returning and circulating is small, so that the number of generations of microwaves is also reduced. Microwaves are a type of electromagnetic wave, and only heat the object to be heated without loss as heat in the equipment, only when there is a loss when converting commercial power to microwave power. It is often used because it requires less power and lower costs than other heating methods. The heating method of irradiating microwave to the highly viscous colloidal medium liquid used in the present invention is intended to reduce the running cost by improving the thermal efficiency because the heating rate is increased and the cooling rate of the medium liquid is slow. It can be said that the method of melting snow. In addition, since a hot water tank equipped with a magnetron that generates microwaves only needs to be fixed by attaching a joint valve to the circulation pipe, it can be installed according to the applicable range, and unlike a boiler, lubrication must be performed. It can be installed in a small place, and there is almost no noise.

[0005]

[Embodiment of the invention]

 The device of the present invention utilizes microwaves emitted from a magnetron attached to a hot water tank, circulates through the hot water tank, and directly irradiates the highly viscous colloidal medium liquid that accumulates back. As a result, the high-viscosity medium liquid absorbs the high frequency wave inside and is converted into heat by vibrating. The heating time by microwave is short, the heating time is short, only the object to be irradiated (medium liquid) is heated and the hot water tank itself is hardly heated, and the high viscous colloidal medium liquid heat rises faster than water. The running cost is naturally lower. In addition, a radiating pipe is buried under the ground to circulate a highly viscous medium liquid to melt snow.However, since the circulating temperature reaches a lower cooling temperature than the conventional circulating medium liquid, the number of microwave irradiations is reduced. Can be reduced and energy savings can be further increased.

FIG. 1 and FIG. 2 show the results of examining the thermal efficiency by irradiating microwaves to a liquid actually used as a medium liquid. Since the liquid radiated by the magnetron of the microwave generator flows through the radiating pipe of indefinite length and returns to the hot water tank again, the heat drop rate of the liquid is very important. Is required. As for the highly viscous colloidal liquid used in the present invention, the result of the heat efficiency experiment shows that the highly viscous colloidal fluid described in claim 1 of the present application has the largest heat rise rate and the smallest heat drop rate. The medium liquid described in 1 is used.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a cross-sectional view of the apparatus. The automatic power switch 3 attached to the circulation pump 4 is automatically turned on when snow falls by the snow sensor 1 and the signal cable 2 in the figure. I do. Also, preferentially, an automatic power switch 3 is connected via a temperature sensor 7 connected to the snow melting heat radiating pipe 6 for sensing the temperature of the medium and a signal cable 8 thereof. The circulation pump automatically stops when the temperature rises above the set temperature for stopping the operation of the liquid medium in the snowmelt heat radiation pipe. The microwave 10 emitted from the magnetron 9 installed above the hot water tank 5 directly irradiates the high-viscosity circulating medium liquid 11 in the hot water tank 5 to warm it. The temperature of the highly viscous circulating medium liquid 11 is measured by a temperature sensor 12 and displayed on a temperature display plate 14 via a temperature signal cable 13. The temperature sensor 12 determines the temperature of the medium liquid 11 in the hot water tank 5, and automatically controls the temperature of the magnetron 9 installed in the hot water tank 5 through the temperature sensor signal cable 15. The switch 16 turns ON and OFF. The medium liquid 11 enters the circulation pump (gear pump, piston pump) 4 through the suction pipe 17 of the circulation pump provided in the hot water tank 5, and the medium liquid 11 forcedly fed from the circulation pump 4 passes through the feed pipe 18. It flows to the snowmelt radiating pipe 6 laid under the ground. A heat insulating plate 19 for laying is laid on the lower surface of the heat radiating pipe 6 so that heat is not dissipated into the ground, and the radiated heat 20 from the heat radiating pipe 6 is radiated only to the upper ground surface to melt snow on the ground. It is effective for scum. The flow rate of the high-viscosity medium is adjusted by the flow control valve 21. The medium liquid 11 passes through the return pipe 22 from the heat radiating pipe 6, returns to the hot water tank 5 again, receives microwave irradiation, and is forcibly circulated again.

[Brief description of the drawings]

FIG. 1 is a diagram of an experimental result obtained by irradiating a liquid serving as a medium liquid with microwaves.

FIG. 2 is a diagram showing a cooling temperature of each medium liquid.

FIG. 3 is a diagram showing a use state of the embodiment of the present invention.

[Explanation of symbols]

 (1) Snowfall sensor (2) Signal cable (3) Power switch (4) Circulation pump (gear pump, piston pump) (5) Hot water tank (6) Melting heat radiation pipe (7) Temperature sensor (8) Signal cable (9) ) Magnetron (10) Microwave (11) High viscosity circulating medium liquid (12) Temperature sensor (13) Temperature signal cable (14) Temperature display board (15) Temperature sensor signal cable (16) Temperature control automatic switch (17) Suction Pipe (18) Feed pipe (19) Heat insulation board for laying (20) Heat dissipation (21) Flow control valve (22) Return pipe

Claims (1)

[Utility model registration claims] 1. The circulating medium liquid for snow melting used in the present invention is a translucent liquid having an external appearance and a heat resistance of about 200 ° C. with an acrylamide / acrylic acid polymer mainly composed of an anionic emulsion type polymer and water. A hot water tank in which the high-viscosity circulating medium liquid temporarily accumulates in the middle of a pipe for circulating the medium liquid by mixing the antifreeze with the medium liquid that has been mixed into a high-viscosity colloidal form, and an upper part of the hot water tank A temperature sensor for automatically controlling the start and stop of the microwave generator by attaching a microwave generator to the microwave generator, and a temperature sensor for sensing the temperature of the circulating medium liquid in the hot water tank and a temperature sensor via its signal cable. Activate the switch to directly irradiate the circulating medium liquid stored in the hot water tank with microwaves generated from a microwave generator, and rapidly heat the circulating medium liquid at a high temperature to reach a high temperature. To circulate the high viscosity medium fluid, connect the suction pipe of the piston pump or gear pump to the hot water tank, and start and stop the circulation pump via signal cables such as a snowfall sensor and a medium fluid temperature sensor installed in the snow melting heat radiation pipe. Is automatically operated to forcibly circulate the high-viscosity circulating medium liquid under pressure.