The lamp heater with a mirror effective length of 3.30 in (84 mm) which is positioned as the standard product of this series is shown in the above photograph.
The photograph on the top left side is when viewed from the opening side, the photograph on the top right side is the irradiation state (20% voltage). The lower photograph is of a white paper which has the burn mark caused by the irradiation to understand the distribution of the heating width and length.
The lamp used by this standard unit (L = 3.3 in (84 mm)) is the mass-produced J type halogen lamp. Therefore products with voltages of 100 V, 110 V, 220 V, and 240 V can be obtained, and products with power in the range 200 W to 500 W are also available.
The supply is stable as they are mass-produced products, and have advantages such as low cost even in small numbers.
When the 110 V - 500 W halogen lamp is combined with the above mentioned standard line heater unit LHW-30/f20/L84, the heating width and length is approximately width 0.098 in (2.5 mm) X length 1.18 in (30 mm) (see the photograph below).
The LHW-30 series is not limited to the above mentioned size, and can be manufactured up to an effective mirror length of 78.74 in (2000 mm) with a similar structure. However, the external diameter of the halogen lamp that can be used is limited to ø0.413 in (10.5 mm), products with length of more than 500 mm are likely to have problems with the strength. If a long product is required to be prepared, an intermediate support has to be provided.
However, when a long product is required, LHW-55/H18 series should be used.
Basic cooling by water cooling (connected with ø0.157 (4) tube). Forced air cooling unit can also be used. Also, if the average power is limited to below 100 W (voltage limit, or ON-OFF) forced cooling may not be required in some cases. However, since this is dependent on the environment in which the product is used, checking is required to ensure that the body temperature is below 302°F (150ºC).
The below photograph shown the condensed state when the distance is changed. Reaches the focal position when the distance is 0.78 in (20 mm).
The model is LHW-30/f20/220v-500w, and has been lit with 30 V (approximately 13.5% voltage)
|Irradiation distance 0.47 in (12 mm)
||Irradiation distance 0.55 in (12 mm)
||Irradiation distance 0.78 in (20 mm)
||Irradiation distance 1.18 in (20 mm)
As can be seen from the above photograph, heating with some width is possible when the unit is shifted from the focal length (0.78 in (20 mm). There is a sense of uniform irradiation intensity when moved in the away direction.
When irradiated uniformly, the temperature is higher at the center (as heat can escape easily from the sides), and perhaps uniform temperature can be obtained when the width is increased by moving closer. (this is depends on the object that is heated, and cannot be stated categorically) but the loss of light is less by moving closer.
To ensure reliable high temperature heating, a little ingenuity is required along with the selection of the heater --> “Cavity heating method” The following is the general drawing of LHW-30 type. All products can be clearly stated and specified with these drawings and the model number.
“Special dimension product drawings”,
“Standard product drawings with mirror length 3.30 in (84 mm)”
Standard product list LHW-30/f 20/L/volts-watts
|| 2900 K
|| 800 h
|| 2600 K
|| 5000 h
|| 2900 K
|| 1500 h
Front glass width = 1.18 in (30 mm), length = (L + 0.19 in (5 mm)) thickness 0.118 in (3 mm), corners 1.5C
If there are restrictions on the length or thickness of the lamp, the higher the output of the lamp, lower will be the service life of the lamp.
It is also possible to combine with the far-infrared heater. However, the power will be 1/4 that of a halogen lamp. High temperature heating is not possible, but can be used for heating materials such as paper and transparent glass which cannot absorb near-infrared and visible light in some cases.
Line heater with front glass
The mirror will get dirty if smoke is generated from the object which is heated, one of the measures taken is to provide a glass plate at the opening of the mirror. (see the photograph below)
Glass in the case of LHW-30 is t 3.0 ultra-heat-resistant glass 1112°F (600ºC).
LHW-30/f 20/200v-1kw/+GP/+FG (gold-plated, with front glass)
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