CN2292362Y

CN2292362Y - Infrared quartz heater

Info

Publication number: CN2292362Y
Application number: CN 97212290
Authority: CN
Inventors: 葛世名
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-19
Filing date: 1997-03-19
Publication date: 1998-09-23
Anticipated expiration: 2007-03-19

Abstract

The utility model relates to a high infrared quartz heater, which is provided with a milky quartz glass tube whose inside is provided with an electric heating wire which is wound with a tungsten wire. The two ends of the electric heating wire are respectively connected with a leading-out terminal; the space between the leading-out terminals and the milky quartz glass tube is sealed through a plurality of layers of transition glass with different expansion coefficients, wherein, the expansion coefficient of an inner layer transition glass is approximate to that of each of the leading-out terminals; the expansion coefficient of an outer layer transition glass is approximate to that of the milky quartz glass tube, which solves the bursting problem of the milky quartz glass tube, and extends the service life of the high infrared heating member in a large scale.

Description

The high IR quartz heater

The utility model belongs to a kind of electric heater, particularly a kind of intense radiation high IR quartz heater.

Quartz heater once was subjected to the application of wide model owing to have advantages such as little, corrosion-resistant, energy-conservation and life-span of thermal inertia is long in heating process.But existing common quartz heater is owing to be subjected to the restriction of structure and material therefor, and its unit power density can only reach 3～4W/cm ², under this power density, can not form the high energy transmission, thereby limit the further application of common infrared quartz heater.

Along with the requirement to the efficiency of heating surface improves constantly, HIGH INFRARED HEATING TECHNIQUE is subjected to people's attention.The high IR heating is a kind of high strength, high-energy, high density, the high all band infrared emanation of concentrating.The high IR element is to turn to thermal source with tungsten filament, adds milky white silica tube, adopts traditional tungsten halogen lamp sealing structure, makes through vacuumizing filling inert gas and reducibility gas.Its unit power density can reach 15～20W/cm ², be 3～7 times of common infrared components, thereby realized the high energy transmission.But because the heat source temperature of high IR heating element is higher, be generally 2200～2400 ℃, thereby, explosion usually takes place in sealing-in place of its leading-out terminal and quartz glass tube in practice, this mainly is traditional tungsten halogen lamp sealing structure requirement of incompatibility high IR heating element, differ greatly as the molybdenum sheet of leading-out terminal and the coefficient of expansion of quartz glass, both directly seal, when heating, just will inevitably cause the explosion of quartz glass tube, this has not only reduced the useful life of high IR heating element, has also limited the raising of high IR heating element rated power.

The purpose of this utility model is to overcome the deficiencies in the prior art, and the sealing structure of high IR quartz heater is improved, and a kind of high-power high IR quartz heater is provided.

The utility model is achieved in that

It has a milky white quartz glass tube, heating wire with the tungsten filament coiling is housed in milky white quartz glass tube, the two ends of heating wire are connected to leading-out terminal respectively, between leading-out terminal and milky white quartz glass tube with the different transitional glass sealing-in of the several layers coefficient of expansion, wherein the coefficient of expansion of the coefficient of expansion of internal layer transitional glass and leading-out terminal is close, and the coefficient of expansion of outer transitional glass and the coefficient of expansion of milky white quartz glass tube are close.

Advantage of the present utility model is, adopt the different transitional glass of the coefficient of expansion that leading-out terminal and milky white quartz glass tube are carried out sealing-in, avoided the problem of milky white quartz glass tube explosion fully, prolonged the useful life of high IR heating element, its average life span can reach more than 5000 hours, in addition, the rated power of single high IR heating element is further improved, thereby strengthened the radiation intensity of high IR heating element, simultaneously, also solved the sealing-in problem of high-power tungsten halogen lamp leading-out terminal.

The drawing explanation:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of another embodiment of the utility model.

Provide embodiment of the present utility model below in conjunction with accompanying drawing:

Embodiment 1:

As shown in Figure 1, the utility model has a milky white quartz glass tube 6, and heating wire 5 is housed in milky white quartz glass tube 6, and heating wire 5 usefulness tungsten filament coilings form; Two ends at heating wire 5 are connected to leading-out terminal 2 respectively, and described leading-out terminal 2 is bar-shaped tungsten bar, welds together with heating wire 5; On leading-out terminal 2, also be connected to lead-out wire 1, so that be connected with power supply; Between leading-out terminal 2 and milky white quartz glass tube 6 with different transitional glass 3 sealing-ins of the several layers coefficient of expansion, wherein the coefficient of expansion of the coefficient of expansion of the transitional glass 3 of internal layer and leading-out terminal 2 is close, the coefficient of expansion of the coefficient of expansion of outer field transitional glass 3 and milky white quartz glass tube 6 is close, to avoid causing milky white quartz glass tube 6 explosions because of its coefficient of expansion difference in the process of heating; At the two ends of milky white quartz glass tube 6 ceramic sealing cap 4 is housed also,, avoids when using or install, damaging with sealing-in place of protection end.

Embodiment 2:

As shown in Figure 2, its structure such as embodiment 1, difference only is that leading-out terminal 7 is a molybdenum sheet, the width of molybdenum sheet and thickness are determined according to the power of heating wire 5.

Claims

1, a kind of high IR quartz heater, it has a milky white quartz glass tube (6), heating wire (5) with the tungsten filament coiling is housed in milky white quartz glass tube (6), the two ends of heating wire (5) are connected to leading-out terminal (2) or leading-out terminal (7) respectively, it is characterized in that, between leading-out terminal (2) or leading-out terminal (7) and milky white quartz glass tube (6) with different transitional glass (3) sealing-in of the several layers coefficient of expansion.

2, high IR quartz heater according to claim 1 is characterized in that, described leading-out terminal (2) is bar-shaped tungsten bar.