JP2008147051A - Heating element for hot air generation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a heating element for hot air generation having a simple and inexpensive structure with high efficiency, and high safety with low power consumption. <P>SOLUTION: An electrically resistive film is formed on the surface of a tubular base material or a plate base material formed of an electric insulating material such as quartz glass, ceramic glass, or ceramics such as aluminum oxide, and an electrode terminal to be connected to power supply is installed at both ends of the tubular base material or the plate base material. The tubular base materials or plate base materials are combined by a plurality of pieces, or are made a porous structure communicating to the air flowing direction, thereby, by blowing air from one end by a blowing device, hot air can be obtained efficiently. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a heating element for generating hot air, and the technical feature thereof is that a tubular body or a plate body is made of an electrically insulating material such as quartz glass, a SiC film is formed on the surface of the tubular body or the plate body, and both ends are provided. The present invention relates to an efficient heating element for generating hot air for use as hot air by installing an electrode terminal and blowing air generated by energization.

  Generally, the purpose of generating hot air is to dry a specific article gently and slowly. The generation of hot air is roughly divided into a combustion type and an electric heating type. The combustion type mainly uses city gas, natural gas, or other combustible gas or liquid as fuel, and generates heat by combustion. In the electric heating type, the heat is provided by the resistance heat of the resistance heating element, or the PTC (Positiv Temperature Coefficient) electronic component accumulates the heat.

At the same time as the above heat is generated, an air flow is sent from one side by a device such as a blower or a fan, and a necessary hot air is generated and sent from the other end. For the hot air generator of the electric heating system, the superiority or inferiority is determined by the thermal efficiency of the heat generating unit in addition to peripheral elements such as a blower, a heat radiating fin, and an air passage.

Among the electric heating units, the most ideal electric heating type heat generating unit is simple in structure, low in cost, high in efficiency, low in power consumption and high in safety. Conventional electric heating type heating element for generating hot air uses heat accumulated in the element or electric heating tube to generate heat, but power consumption is high, temperature is unstable, and heat generating material is damaged. Because there are fatal drawbacks such as being easy to do and dangerous, it is necessary to improve.
Japanese Patent No. 3785422

In view of the prior art, the object of the present invention is to combine the electronic components so that the user can adjust the capacity required by himself and generate hot air at an appropriate and necessary temperature, as well as simple and cost-effective. Another object of the present invention is to provide a highly safe heating element with high efficiency and low power consumption.

In order to solve the above-described object, the present invention is to provide a heating element for generating hot air, which uses a ceramic electric insulating material such as quartz glass, ceramic glass, or aluminum oxide ceramic, and has a tubular substrate or a plate base. Make timber. A SiC electric resistance heating element coating layer is formed on the surface of the tubular substrate or plate substrate, and electrode terminals connected to a power source are installed on both ends of the tubular substrate or plate substrate on which the SiC film is formed. By combining with a blower, a good heating element for generating hot air is obtained.

  The power source connected to both ends of the electrodes of the heating element for generating hot air of the present invention may be either an alternating current (AC) power source or a direct current (DC). The power supply voltage is used in the range of 5V to 380V, and taking a tubular substrate having a length of 10 cm as an example, its power reaches 4000 watts. According to the actual measurement, a hot air value of 300 ° C. or higher can be reached by combining an air blowing device with an appropriate air blowing amount.

  The heating element of the heating element for generating hot air according to the present invention has a small amount of positive temperature coefficient, and is different from a general PTC heating method having a low temperature and a short life.

  In the present invention, a base material is made of an electrically insulating material, a SiC film is formed on the surface of the base material, and electrode terminals connected to a power source are installed on both ends of the base material. By combining the specified electronic components, the user can adjust the hot air temperature by himself / herself, and also provides a simple, low-cost structure with high efficiency, low power consumption and safety. To do.

Hereinafter, in order to clearly show the heating element for generating hot air of the present invention, a detailed description will be given.

  FIG. 1 is a three-dimensional view of a heating element for generating single-pipe hot air according to the present invention. Reference numeral 1 denotes a tubular substrate made of a ceramic material such as quartz glass, ceramic glass or aluminum oxide. A SiC electric resistance film is formed on the inner, inner or outer surface of the tubular substrate 1. Electrode terminals 3 and 4 connected to a power source are installed on both ends of the tubular base material 1 on which the SiC electric resistance film 2 is formed.

  By energizing the electrode terminals 3 and 4, the tubular base material 1 on which the SiC electric resistance film 2 is formed generates appropriate thermal energy. When the air is blown from one end of the tubular base material 1 from the blower and the air passes through the surface of the tubular base material 1 on which the SiC film 2 is formed, the required hot air is obtained on the opposite side.

  FIG. 2 is a three-dimensional view of a heating element for generating parallel hot air according to the present invention. The tubular base materials 1 are arranged in parallel.

  3 to 5 are three-dimensional views showing other examples of the heat generating element for generating hot air according to the present invention. The shape may be a circular vertical hole 11, a honeycomb-shaped vertical hole 12, or a rectangular vertical hole 13.

  6 and 7 are three-dimensional views showing another embodiment of the heating element for generating hot air according to the present invention. The tubular body of the tubular substrate 1 is not limited to a circle, but may be a square or a polygon other than a circle.

  FIG. 8 is a partially exploded three-dimensional view showing still another embodiment of the heating element for generating hot air according to the present invention. The structure is such that a plate base 6 is provided inside a general heat-resistant frame-like or tubular main body 5, and a SiC film 2 is formed on the surface of the plate base 6. Electrode terminals 3 and 4 connected to a power source are installed at both ends of the plate base 6 on which the SiC film 2 is formed.

  One end of the frame-like or tubular body 5 is blown in combination with a blower, and air passes through the surface of the plate substrate 6 on which the SiC film 2 is formed, so that hot air required from the opposite side is obtained. Is obtained.

It is a three-dimensional view showing a heating element for generating single tubular hot air according to the present invention. It is a three-dimensional view showing a heating element for generating hot air according to the present invention. It is another example of this invention, and is a three-dimensional view showing a heating element for generating hot air having a circular longitudinal hole. It is another example of this invention, and is a three-dimensional view showing a heating element for generating hot air having a honeycomb-like vertical hole. It is another example of this invention, and is a three-dimensional view showing a heating element for generating hot air having a rectangular vertical hole. It is another Example of this invention, and is a three-dimensional view which shows the heat generating body for square hot air generation. It is another example of this invention, and is a three-dimensional view showing a heating element for generating hot air having a polygonal shape. It is a three-dimensional view showing a partial disassembly of another embodiment of the heating element for generating hot air of the present invention.

Explanation of symbols

1 Tubular substrate
11 circular vertical holes
12 honeycomb vertical holes
13 grid-like vertical holes
2 SiC electric resistance film
3 electrode terminal
4 electrode terminal
5 frame or tubular body
6 plate substrate

Claims (5)

  An SiC coating 2 is formed on the inner or inner outer surface of a tubular substrate made of quartz glass or ceramics such as alumina, and is added to both ends of the tubular substrate 1 on which the SiC coating 2 is formed. A heating element for generating hot air, characterized in that electrode terminals 3 and 4 are installed.   2. The heating element for generating hot air according to claim 1, wherein the tubular substrate 1 is provided with a single tube or a plurality of tubes in parallel. 2. The heating element for generating hot air according to claim 1, wherein the tubular substrate 1 forms a single or a plurality of through holes, and the cross-sectional shape thereof is a circular shape, a honeycomb shape, or a rectangular cross section.   2. The heating element for generating hot air according to claim 1, wherein a cross-sectional shape of the tubular main body of the tubular substrate 1 is a circle, a square, or a polygon.   As the tubular base material 1, electrode terminals 3 and 4 connected to a power source are installed at both ends of a plate base material 6 on which an SiC film 2 is formed, and the plate base material 6 is disposed between heat-resistant frames and is tubular. 2. The heating element for generating hot air according to claim 1, wherein a structure is formed.

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