JPH0525193Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[0001]

[Field of Industrial Application] The present invention relates to a lattice-shaped far-infrared radiator that emits far-infrared rays and can be used, for example, as a heat exchanger or a catalyst carrier.

[0002]

[Prior art] Conventionally, far-infrared rays are emitted in Fig. 7.
A means for heating an object such as a gas, solid, or liquid using a rod-shaped radiator 11 and a reflector 12 is known.

【0003】

[Problems to be solved by the invention] However, the conventional radiator that heats the object using far-infrared radiant energy radiates far-infrared rays from only one direction, so the heating surface area of the radiator is limited. There was a problem in that the far-infrared radiant energy was small and the far-infrared radiant energy could not be efficiently absorbed by the object.

[0004] The present invention aims to provide a lattice-shaped far-infrared radiator to solve the above problems.

[0005]

[Means for Solving the Problems] The present invention provides ceramic particles made of alumina, magnesia, zirconia, or composites thereof, which have far-infrared radiation characteristics, by adding a synthetic resin as an additive and a auxiliary agent to the ceramic particles. The raw materials obtained by adding each oil component and stirring and mixing using a dry method are extruded using an extruder and fired to form a radial part having a large number of lattice-shaped cells, and the radial parts of the lattice-shaped radial part are The above problem was solved by providing a heat source around the outer periphery and further covering the outer periphery of the heat source with a reflective plate.

[0006]

[Operation] According to the present invention having the above configuration, when the heat source body is heated, far infrared rays are emitted from the radiating part, but this far infrared rays are reflected by the reflector and do not leak to the outside. The radiation part has a lattice shape and the radiation surface area is large, and the gas passing through each lattice,
Increases the absorption efficiency of far infrared rays into objects such as solids and liquids.

[0007]

[Example] Among ceramics, it is widely known that alumina-based, magnesia-based, and zirconia-based ceramics in particular have far-infrared radiation characteristics.

[0008] The present invention uses alumina, magnesia, zirconia, and
Alternatively, it is a far-infrared radiator with a lattice structure made of ceramic particles made of a composite of these, and will be explained in more detail below.

[0009] Among ceramics having far-infrared radiation characteristics, ceramic particles made of alumina, magnesia, zirconia, or a composite thereof are not particularly limited, but preferably 2
~55 ~ ceramic particles with a particle size of ~50 μm
75% by weight, 24 to 44% by weight of synthetic resin such as polyethylene as an additive, and 1% by weight of an oil component such as vegetable oil as an auxiliary agent. The raw material is extruded from an extruder (not shown) equipped with a lattice-shaped mouthpiece, cut into a predetermined length to form a molded body, and this molded body is fired to form lattice-shaped cells. 1 is formed.

[0010] It is preferable that the radiating section 2 has a structure having the lattice-like cells 1 as described above, but the lattice-like structure is generally a honey comb, and the lattice-like shape is are square or hexagonal, and although the cell 1 in the present invention does not need to be particularly limited, it is better to make it square for better far-infrared radiation efficiency. Furthermore, it is recommended that the radiating part 2 is formed into a circular shape, with a diameter of about 5 to 15 cm and a length of 5 cm or more, and the number of cells 1 is 25 to 100 per 1 square cm. is preferred.

[0011] A heat source body 3 such as an electric heater is provided around the outer periphery of the radiating section 2, and a reflector plate 4 made of a steel plate such as aluminum or stainless steel is further disposed around the outer periphery of the heat source body 3 to prevent radiant energy from leaking to the outside. A radiator 5 is formed by covering the radiator.

[0012] By providing the radiator 5 with a large number of lattice-shaped cells 1, the surface area becomes large, gas, solid, and liquid can pass through the cells 1, and the anisotropy of mechanical strength becomes large. As a result, when the heat source body 3 is heated, the radiation part 2 is heated and far infrared rays are emitted from the ceramic particles.

[0013] Figure 4 shows the far-infrared radiation spectral distribution when the surface temperature of the radiator 5 is 250°C and the diameter of the radiator 2 is 5 cm and the number of cells 1 is 400. Curve a is the radiation spectrum of alumina, curve b is the radiation spectrum of magnesia, and curve c is the radiation spectrum of zirconia, all of which have excellent far-infrared radiation characteristics.
It is understood that a large amount of far-infrared rays with strong penetrating power is emitted.

[0014] Furthermore, the far infrared rays from the radiation part 2 are shown in FIG.
As shown in the figure, far infrared rays are radiated from the four peripheral walls of each cell 1 in the direction of the arrow (towards the space), and far infrared rays radiated from the radiation section 2 to the outer periphery are reflected by the reflector 4.
There is no leakage of the far infrared rays as they are reflected inward by the cell 1, and the far infrared rays can be efficiently absorbed by objects such as gases, solids, and liquids passing through the cell 1. In particular, since the radiation section 2 has a large surface area, the radiation efficiency of far-infrared rays to objects such as gases, solids, and liquids is high, and the efficiency is high if the far-infrared absorption spectrum of the object is taken into consideration.

[0015] It was obtained by adding 74% by weight of alumina with a particle size of 10 μm, 24% by weight of polyethylene as an additive, and further adding 1% by weight of vegetable oil as an auxiliary agent and stirring and mixing using a dry method. The lattice-shaped far-infrared radiator 5, which was formed by extruding raw materials using an extruder, was used as the heat source of an ultrapure water heater, and compared with that using a general-purpose heater as the heat source, the results shown in Table 1 were obtained. It was verified that the radiator 5 of the present invention is excellent.

[0016] ■■■ Turtle shell [0005] ■■■

[0017] Note that FIG. 5 is an absorption spectrum distribution diagram of water, and when the present invention radiator 5 is used efficiently as a heat source for an ultrapure water heater, the absorption rate can be determined using this water absorption spectrum distribution diagram. It is effective to use ceramics that emit far infrared rays with a wavelength of 6 to 15 μm.

[0018] In addition, 75% by weight of alumina with a particle size of 10 μm, and 24% by weight of polyethylene as an additive.
The lattice-shaped far-infrared radiator 5 is molded by extruding the raw materials obtained by adding 1% by weight of vegetable oil as an auxiliary agent and stirring and mixing using a dry method using an extruder. When used as a catalyst carrier for exhaust gas removal and compared with that using a conventional electric filter, the results shown in Table 2 were obtained, proving that the radiator 5 of the present invention is superior.

[0019] ■■■ Turtle shell [0006] ■■■

[0020] FIG. 6 is a nitrogen oxide absorption spectrum distribution diagram, and when the present invention radiator 5 is used efficiently as a catalyst carrier for removing nitrogen oxides, this absorption spectrum diagram shows the nitrogen oxide absorption spectrum distribution diagram. It is effective to use ceramics that emit far infrared rays with a wavelength of 4 to 10 μm.

[0021]

[Effect of the invention] Since the present invention is as described above, far infrared rays are emitted from the radiating part by heating the heat source, and the emitted far infrared rays are reflected by the reflector and do not leak to the outside. Moreover, since the radiation part has a lattice shape and the radiation surface area is large, it is possible to increase the absorption efficiency of far infrared rays passing through the lattice part into objects such as gases, solids, and liquids. Excellent as a heat exchanger and catalyst carrier.

[Brief explanation of the drawing]

FIG. 1 is a front view of the lattice-shaped far-infrared radiator of the present invention.

FIG. 2 is a cross-sectional view of the lattice-shaped far-infrared radiator of the present invention.

FIG. 3 is a partially enlarged vertical cross-sectional view of the lattice-shaped far-infrared radiator of the present invention.

FIG. 4 is a far-infrared radiation spectrum distribution diagram of the lattice-shaped far-infrared radiator of the present invention.

FIG. 5 is an absorption spectrum distribution diagram of water.

FIG. 6 is an absorption spectrum distribution diagram of nitrogen oxides.

FIG. 7 is a vertical cross-sectional view showing a conventional radiator.

[Explanation of symbols]

1...Cell 2... Radiation part 3...Heat source 4...Reflector 5...Radiator.

Claims (1)

[Scope of utility model registration request] A synthetic resin as an additive and an oil component as an auxiliary agent are added to ceramic particles made of alumina, magnesia, zirconia, or a composite of these materials that have far-infrared radiation characteristics, and the mixture is stirred and mixed using a dry method. The obtained raw material is extruded and fired using an extruder to form a radiating section having a large number of lattice-shaped cells, and a heat source is provided around the outer periphery of the lattice-shaped radiating section. A lattice-shaped far-infrared radiator characterized by having its outer periphery covered with a reflective plate.