Open a small hole in the box and heat it from the outside. The small irradiation holes opened in the box take advantage of the high infrared absorptivity. The effectiveness of this heating method is proved by the “Stephan-Boltzmann law”. ...
Read More »6-5.Re-reflective heating method – Dome heating
A dome cover is used when heating a relatively wide area or heating a plate-like material uniformly. If the dome cover needs to be durable, our condense mirrors can also be used as a dome cover. The light energy emitted ...
Read More »6-4.Re-reflective heating method – Frame heating
Make a frame with insulation and place it on the object to be heated to improve the heating efficiency. The heating target of frame heating is heated with three elements. 1. Direct heating from heat source 2. Reflective heating from ...
Read More »6-3.Re-reflective heating method – Groove heating
To improve the heating efficiency, make a groove with insulation and place the object to be heated inside the groove. This figure shows the case where the object to be heated is small and equal to or smaller than the ...
Read More »6-2.Re-reflective heating method – Large condense mirror
When the object to be heated is heated from a distance, diffuse reflection ray is only emitted to the surroundings. When the condenser mirror of sufficient size is brought close to the object to be heated and vertically heated, the ...
Read More »6-1.About Re-reflective Heating Method
Outline of Re-reflective heating method Focused heating using a halogen lamp is a heating method that focuses ray on the object to be heated. Thermal energy that is not absorbed by the object to be heated is reflected ray and ...
Read More »4-6.About the seal of halogen lamps
Like incandescent lamps, halogen lamps need to have a sealed structure that prevents the enclosed gas from leaking to the outside. Also, in halogen lamps, the temperature of the valve must be 250 degrees or higher as a condition for ...
Read More »4-5.Quartz glass bulb for halogen lamps
About quartz glass bulbs Due to the halogen cycle, halogen lamp bulbs must be heat-resistant glass with a temperature of 250℃ or higher when lit. In addition, the inert gas and halogen gas in the bulb are sealed at a ...
Read More »4-4.Heat treatment of tungsten
About heat treatment of tungsten Tungsten has a melting point of 3422 ℃, which is the highest melting point of metals. From a machining perspective, the ductile-brittle transition temperature is high and low temperature brittleness is seen at room temperature. ...
Read More »4-3.About filament coil
Tungsten, which has the highest melting point of metals, is used as the filament. In order to suppress heat loss due to the halogen gas to be enclosed, a filament that has been improved from a straight line and made ...
Read More »4-2.Types and mechanisms of halogen lamp gas
Halogen lamp gas type Halogen lamps are incandescent lamps that contain an inert gas and a small amount of halogen gas inside the lamp. Inert gas Inactive gas includes helium (He 4.00g/mol), neon (Ne 20.18g/mol), (nitrogen (N2 28.02 / mol)), ...
Read More »5-4.Proper use of near-infrared heating and far-infrared heating
A halogen heater is used for radiant heating of near infrared rays. Of the electromagnetic waves radiated from a heating element at about 3000℃, the maximum wavelength is about 1μm in the near infrared region. A convex parabola is drawn ...
Read More »5-3.About the Wavelength of Heat Radiation
An object with an absolute temperature of 0K (Kelvin) or higher radiates a wavelength corresponding to the temperature of the object as an electromagnetic wave. The object that received this electromagnetic wave has received heat. This transfer of heat is ...
Read More »5-2.About the Type of Reflection
There are two main types of reflection. Regular reflection Regular reflection refers to reflection that holds the “law of reflection” in which the angle of incidence and the angle of reflection of light incident from a light source are equal. ...
Read More »5-1.Light Reflectance,Transmittance, Absorption Rate = Emissivity
Every substance is made up of very small particles. The molecules that make up that substance have different molecular motions depending on the temperature. A molecule is made up of several atoms linked by chemical bonds, and any bond. Each ...
Read More »4-1.Development History Up to Halogen Lamps
Development of carbon filament Halogen lamps evolved from incandescent light bulbs. Carbon fiber was used for the filament of the early heat-generating light bulbs. Metal filaments such as osmium and tantalum were being developed, but they did not reach the ...
Read More »3-8.Wide Range of Plane Heating with Line Heating Type Halogen Line Heater
By arranging multiple line heating types and lengthten the focal length from the rated distance, the condensing width can extend and a wide range of heating can be performed. (Out focus) Of course, even with the plane heating type, a ...
Read More »3-7.Halogen Line Heater Lifespan
The lifespan of a halogen lamp depends on the voltage used. The rated voltage is defined as 100%, and if the voltage is lowered by 10%, the lifespan is extended by about 3 times, and if the voltage is increased ...
Read More »3-6.Halogen Line Heater cooling
Continuous use of halogen line heaters always requires cooling. This is because the heat resistance temperature of the lamp seal is 300°C. Avoid using it at the heat-resistant temperature limit, and be sure to cool it down. If user heat ...
Read More »3-5.Temperature Distribution of Halogen Line Heater
3-4.Focal length and focal width of Halogen Line Heater
Relationship with the light collecting diameter of the Halogen Line Heater First of all, we will define the words. “Focus width” is the narrowest width of condensing distance. And focus width is rated width. “Focal length” is the condensation distance ...
Read More »3-3.How to use Halogen Line Heater
[Manual setting with cooling unit installed] [Automatic setting with cooling unit installed]
Read More »3-2.Basic structure of Halogen Line Heater
[Basic structure of Halogen Line Heater] Halogen Line Heater consists of cooling unit, lamp unit, Condensing mirror unit, terminal box, and protective glass. Most of the composition covers an elongated lamp and is occupied by a condensing mirror. Quartz glass ...
Read More »3-1.Overview of Halogen Line Heaters
Halogen Line Heater (Line Condensing Type) Halogen Line Heater (Plane Condensing Type) Halogen Line Heaters convert the electricity of rod-shaped halogen lamps into light, A heater that uses a condensing mirror to concentrate the light in a line or plane ...
Read More »2-7.Halogen Point Heater Lamp lifespan
The lifespan of a halogen lamp depends on the voltage used. The rated voltage is defined as 100%, and if the voltage is lowered by 10%, the lifespan is extended by about 3 times, and if the voltage is increased ...
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