JP4623416B2 - Infrared radiation snow melting method and apparatus - Google Patents

Description

  The present invention is, for example, an infrared radiation melting method for melting snow by melting infrared radiation near a signal waiting on a pedestrian crossing in a snowfall area, near a bus stop, near an entrance of an underpass, Braille blocks, and the entrance of a tunnel by infrared radiation, and It relates to the device.

2. Description of the Related Art Conventionally, as this type of infrared snow melting apparatus, an apparatus having a structure in which infrared radiation emitted from an infrared heater is irradiated to a snow melting site and the snow is melted by the thermal energy of the infrared radiation is known.
JP-A-63-86289 Japanese Utility Model Publication No. 63-27538

  In the case of these conventional structures, the surface temperature of the heating element of the infrared heater is set to a temperature range of 400 ° C. to less than 700 ° C., most of which is set to a surface temperature of 550 ° C.

  This infrared ray is a kind of electromagnetic wave and is a wave of light having thermal energy. Generally, infrared rays having a wavelength of 0.8 to 5 μm and a temperature range of about 400 ° C. to 2500 ° C. are used for industrial purposes. ing.

  Here, it is known that the maximum energy wavelength (λmax) and the light source absolute temperature (T) have a relationship of λ = 2897 / T (Winn's displacement law), and although not unified, the maximum energy wavelength ( μm) is 3.5 μm to 5.0 μm, 400 ° C. to 700 ° C. “long wavelength infrared (low temperature region)” (also called far infrared), and the maximum energy wavelength (μm) is 2.0 μm to 3.5 μm, 700 "Medium Wavelength Infrared (High Temperature Range)" of ℃ to 1200 ℃, "Short Wavelength Infrared (High Temperature Range)" of Maximum Energy Wavelength (μm) of 1.0 to 2.0μm, 1200 ℃ to 2500 ℃ (both near infrared rays) In other words, the conventional structure uses infrared rays belonging to “long wavelength infrared rays (low temperature region)”.

  This is the reason why it is used only for infrared rays belonging to this "long wavelength infrared ray (low temperature region)". In infrared radiation heating and melting snow, the target substance (snow) is irradiated with infrared rays through the atmosphere, and the purpose is Energy is absorbed and absorbed in the substance, and the absorbed energy is a heating principle in which molecules or atoms vibrate and frictional heat is generated between the oscillated molecules. This is because it is necessary to consider the absorption state of infrared rays with respect to the above. Considering these infrared absorption states with respect to the atmosphere, the best wavelength range for the infrared transmission band is between 3.75 μm to 4 μm, 8.7 μm, and 11 μm (referred to as a so-called window). However, in the wavelength range of 8.7 μm and 11 μm, the heating element of the infrared heater becomes large, and the flexibility of use is low. As a result, it belongs to the category of “long wavelength infrared rays (low temperature region)” 3 Long wavelength infrared rays (low temperature region) between .75 μm and 4 μm were used as technical common sense.

  However, when infrared rays belonging to the above-mentioned “long wavelength infrared ray (low temperature region)” are used, although it is the best wavelength region as an infrared transmission band, it is used outdoors for the purpose of use. Stefan Boltzmann says that the surface temperature of the infrared heater is rapidly reduced, and the effective energy is proportional to the difference between the fourth power of the absolute temperature of the heating element and the fourth power of the absolute temperature of the object. As is clear from the law, since it is “long-wave infrared (low temperature region)”, several experiments have been conducted to show that a drop in the surface temperature of the infrared heater has a large effect on the heater efficiency and rapidly reduces the snow melting efficiency. It was confirmed by the result.

The present invention aims to solve these disadvantages. Among the present inventions, the invention of the method according to claim 1 irradiates the snow melting site with infrared rays radiated from an infrared heater. When melting snow by the heat energy possessed, the heating element of the infrared heater is disposed in a transparent quartz glass tube, the infrared heater is disposed in the case body, and infrared rays from the infrared heater in the case body are passed through the opening space of the case body. A partition structure portion is provided so as to be able to irradiate the snow melting region through the plurality of small spaces, and the partition structure portion includes a plurality of strip-like or honeycomb-shaped openings. Infrared radiation fusion characterized in that it can be formed in a lattice-like small space and the maximum energy wavelength of the heating element of the infrared heater is a medium wavelength infrared ray of 2.0 μm to 3.5 μm Snow is on the way.

The invention of apparatus according to claim 2 irradiates infrared rays emitted from the infrared heaters to snow melting site, the infrared radiation snow melting apparatus for melting snow by a heat energy of the said infrared transparent quartz heating elements of the infrared heaters It is arranged in a glass tube, the infrared heater is arranged in the case body, infrared rays from the infrared heater in the case body are provided to be able to irradiate a snow melting site through the opening space of the case body, and a plurality of the opening spaces are provided. A partition structure portion that can be formed in each small space is provided, and the partition structure portion is provided so that the opening space can be formed in a plurality of strip-like, honeycomb-like, or lattice-like small spaces, and the infrared heater The infrared radiation snow melting device is characterized in that the maximum energy wavelength of the heating element is a medium wavelength infrared ray of 2.0 μm to 3.5 μm .

According to a third aspect of the present invention, the partition structure is characterized in that the opening space is provided so that the opening space can be formed in a plurality of strip-like, honeycomb-like, or lattice-like small spaces. is there.

As described above, in the invention according to the first or second aspect , the infrared ray emitted from the infrared heater is irradiated toward the snow melting portion, and the snow melting of the snow melting portion is performed. At this time, since the maximum energy wavelength of the heating element of the infrared heater is a medium wavelength infrared ray of 2.0 μm to 3.5 μm, the heater unit composed of the infrared heater is reduced in size and weight as apparent from Stefan-Boltzmann's law. It is possible to manufacture a heater unit that is small and lightweight and has high snow melting efficiency. By reducing the size of the infrared heater, the flexibility of installation of the heater unit can be increased, and the application can be expanded. The angle can be easily variably set, the snow melting part can be irradiated intensively, the irradiation efficiency can be improved, and the heating element of the snow wind can be improved. It is easy to take measures to prevent the temperature of the surface from dropping, and the heater unit can be made lighter so that it can be used more flexibly. The heating element of the infrared heater is disposed in the transparent quartz glass tube. Infrared transmittance is high, the heating element can be protected from convective heat loss such as outside air, the infrared irradiation efficiency can be maintained well, snow melting efficiency can be further improved, and An infrared heater is disposed in the case body, and infrared rays from the infrared heater in the case body are provided so as to be able to irradiate the snow melting site through the opening space of the case body, and the opening space can be formed in a plurality of small spaces. Since the partition structure portion is provided, the opening space is formed into a plurality of small spaces by the partition structure portion, and the infrared rays from the infrared heater are transmitted to the snow melting site through the plurality of small spaces. Even if cold air is blown into the case body through the opening space, the opening space is formed in a plurality of small spaces, so that the blowing of this cold wind is suppressed, Can be prevented from being blown to the surface of the infrared heater arranged on the back side of the case body or escaping the warm air near the infrared heater to the outside, and the surface temperature drop of the infrared heater can be suppressed, Snow melting efficiency can be improved.

Further, in the invention of the apparatus according to claim 3 , since the opening space is provided as the partition structure portion so as to be formed in a plurality of strip-like, honeycomb-like, or lattice-like small spaces, the case The rigidity and mechanical strength of the body can be increased, and the durability can be increased.

  1 to 7 show an embodiment of the present invention. Reference numeral 1 denotes a case body. A heater unit is configured by arranging two rod-shaped infrared heaters 2 and 2 in parallel in the case body 1. Electric power is supplied to the infrared heaters 2 and 2 from a power supply unit (not shown) so that the infrared rays L from the infrared heaters 2 and 2 can be irradiated toward the snow melting region M through the opening space R of the case body 1. Yes.

  In this case, the infrared heater 2 is formed by inserting a coil-shaped heating element 2a through a protective transparent quartz glass tube 2b, and the infrared heater 2 has a temperature range where the surface temperature of the heating element 2a is 700 ° C. to 1200 ° C. The structure having a structure suitable for use in the inside is used, and by supplying power to the heating element 2a, the above-mentioned maximum energy wavelength (μm) is 2.0 μm to 3.5 μm, 700 ° C. to 1200 ° C. The surface temperature of the heating element 2a belonging to the category “high temperature region)” is used in a temperature range of 700 ° C. to 1200 ° C. (maximum energy wavelength (μm) is 2.0 μm to 3.5 μm).

  The surface temperature of the heating element 2a is set to a temperature range of 700 ° C. to 1200 ° C. When the temperature is 700 ° C. or less, the device becomes larger than the size desired from a practical viewpoint. This is because inconvenience such as flexibility is caused, and when the temperature is 1200 ° C. or higher, the structure is easily complicated by the heat-resistant structure, and the snow melting efficiency is lowered when reflection on the snow surface is taken into consideration.

Reference numeral 3 denotes a partition structure portion. In this case, two reflecting plates 4 and 4 having a U-shaped cross section are provided in the case body, and a plurality of partition plates 5, 5, 5 are provided in each reflecting plate 4, 4. Are arranged and fixed, and a plurality of strip-shaped small spaces R ₁ , R ₁ , R ₁ ... Are formed by the reflecting plate 4 and the partition plate 5.

As the partition structure portion 3, a lattice-shaped partition member having a reflection function is disposed in the case body, and a plurality of lattice-shaped small spaces R ₁ , R ₁ , R ₁ . A honeycomb structure having a plurality of small spaces R ₁ , R ₁ , R ₁ .

  Since this embodiment has the above-described configuration, as shown in FIG. 1, for example, a support column F is erected on the road shoulder, and the case body 1 is attached to the support column F in a suspended manner. Electric power is supplied to the power supply unit 2 and 2 from the power supply unit (not shown), and the infrared rays L from the infrared heaters 2 and 2 are irradiated toward the snow melting region M through the opening space R of the case body 1. Snow melting will be performed.

At this time, since the maximum energy wavelength of the heating element of the infrared heater is a medium wavelength infrared ray of 2.0 μm to 3.5 μm, the heater unit including the infrared heater 2 is small and light, as is apparent from Stefan-Boltzmann's law. A heater unit with a small and light weight and high snow melting efficiency can be manufactured, and by reducing the size of the infrared heater 2, the flexibility of installation of the heater unit can be increased and the application can be expanded. In addition, the irradiation angle can be easily variably set, the snow melting part can be intensively irradiated, the irradiation efficiency can be improved, and the surface temperature of the heating element 2a can be prevented from dropping due to snow wind. The flexibility of use can be further improved by reducing the weight of the heater unit.

  In this case, since the heating element 2a of the infrared heater 2 is disposed in the transparent quartz glass tube 2b, the infrared transmittance is high, and the heating element can be protected from convective heat loss such as outside air, Accordingly, infrared irradiation efficiency can be maintained well, and snow melting efficiency can be further increased.

In this case, the opening space R is formed into a plurality of small spaces R ₁ , R ₁ , R ₁ ... By the partition structure portion 3, and the infrared rays L from the infrared heaters 2 and 2 are a plurality of small spaces. Irradiation toward the snow melting site M through R ₁ , R ₁ , R ₁ ... And the cold air is blown into the case body 1 through the opening space R, the opening space R Are formed in a plurality of strip-shaped small spaces R ₁ , R ₁ , R ₁ ..., So that the blowing of the cold wind K is suppressed, and the infrared heater in which the cold wind K is disposed on the back side in the case body. 2 and the warm air near the infrared heater 2 can be prevented from escaping to the outside, the surface temperature drop of the infrared heaters 2 and 2 can be suppressed, and the snow melting efficiency can be improved. it can.

Further, in this case, since the opening space R is provided as the partition structure portion 3 so as to be formed in a plurality of strip-like, honeycomb-like, or lattice- like small spaces, the rigidity and mechanical strength of the case body 1 are provided. The durability can be increased.

  The present invention is not limited to the above embodiment, and the structure of the case body 1, the structure and material of the infrared heater 2, the number, the structure of the partition structure portion 3, and the like are appropriately changed and designed.

  As described above, the intended purpose can be sufficiently achieved.

It is a use state figure of the example of an embodiment of the invention. It is sectional drawing of the heater unit of the embodiment of this invention. It is a top view of the heater unit of the embodiment of the present invention. It is a cross-sectional view of the infrared heater of the embodiment of the present invention. It is a partial exploded perspective view of the example of an embodiment of the invention. It is a cross-sectional view of the heater unit of the embodiment of the present invention. It is a longitudinal cross-sectional view of the heater unit of the embodiment of this invention.

L Infrared M Snow melting part R Open space R ₁ Small space 1 Case body 2 Infrared heater 2a Heating element 2b Transparent quartz glass tube 3 Partition structure

Claims (3)

When irradiating the snow melting site with infrared radiation radiated from an infrared heater and melting snow by the thermal energy of the infrared radiation, the heating element of the infrared heater is disposed in a transparent quartz glass tube, the infrared heater is disposed in the case body, Provided to be able to irradiate infrared rays from the infrared heater in the case body toward the snow melting site through the opening space of the case body, provided with a partition structure portion capable of forming the opening space into a plurality of small spaces, And the infrared radiation snow melting method , wherein the maximum energy wavelength of the heating element of the infrared heater is a medium wavelength infrared ray of 2.0 μm to 3.5 μm . In an infrared radiation snow melting apparatus that irradiates a snow melting portion with infrared radiation emitted from an infrared heater and melts the snow by the thermal energy of the infrared radiation, the heating element of the infrared heater is disposed in a transparent quartz glass tube, and the infrared heater is disposed inside the case body. A partition structure that is arranged to be capable of irradiating infrared rays from the infrared heater in the case body toward the snow melting site through the opening space of the case body, and capable of forming the opening space into a plurality of small spaces. An infrared radiation snow melting apparatus provided and having a maximum energy wavelength of a heating element of the infrared heater of 2.0 to 3.5 μm .   3. The infrared radiation snow melting apparatus according to claim 2, wherein the partition structure is provided so that the opening space can be formed into a plurality of strip-like, honeycomb-like, or lattice-like small spaces.

Images