JPH07331373A - Deodorizing element - Google Patents

Abstract

PURPOSE:To obtain a deodorizing element improved in thermal shock resistance and corrosion resistance by caulking a pipe, while is made by forming an Al alloy layer having a specific composition on an iron base material, on a sheath heater in fin like state and forming a low melting enameled layer and a deodorizing catalytic layer on the surface thereof. CONSTITUTION:A metal plate made by forming the Al alloy layer on the iron base material is worked into pipe like form. The Al alloy layer is composed of 0.5-13.5% Si, <=8% Fe, <=0.1% Mg, <=0.1% Mn, <=1.0% other metal and the balance Al. The pipe cut into a prescribed dimension is caulked on the sheath heater 1 to form a fin 2 composed of the iron base material 2a and the Al alloy layer 2b. The low melting enameled layer 3 is formed on the fin 2 by applying a ground coat 3a and topcoat 3b having respective prescribed composition and firing. Next, the deodorizing catalytic layer 4 is formed on the layer. Thus, the deodorizing element improved in shock resistance, thermal shock resistance, the adhesion and activity of the catalytic layer, corrosion resistance, thermal conductivity or the like is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing element used in an air conditioner or the like for removing a bad odor or harmful gas.

[0002]

2. Description of the Related Art Conventionally, as a method for removing a foul odor or a harmful gas, a method of arranging an adsorbent represented by activated carbon or an iron complex in a room to adsorb a gaseous foul odor substance to deodorize is mainly used. Has been. In recent years, a method of removing a malodorous substance by chemically decomposing the malodorous substance such as oxidative decomposition with a catalyst or ozone gas has been used.

[0003]

However, in the conventional adsorption by the adsorbent, the adsorbability of the odorous components varies depending on the characteristics of each adsorbent. Therefore, in order to completely remove the bad odor, Since it is necessary to combine adsorbents suitable for each component, it has been difficult to realize compact and high-performance adsorbents. In addition, since the adsorption capacity has a limit and life, and moisture in the atmosphere interferes with the adsorption of malodorous gas, the adsorbent is replaced regularly or the adsorbed malodor is removed and regenerated. There is a task that must be done.

In most of the catalytic methods, the deodorizing catalyst is externally heated to oxidize and decompose the odorous components. In this method, since the deodorizing catalyst is heated from the outside, the temperature rise of the catalyst is slow and it takes a long time to reach the decomposition temperature. Further, since air is also heated at the same time, there is a problem that heat loss is large.

Further, in the case where the deodorizing catalyst and the heating heater are integrated, there is a problem in the adhesion between the deodorizing catalyst and the supporting base material, and the catalyst may peel off from the supporting base material due to thermal shock. However, there is a problem that the supporting substrate is corroded by the corrosive gas and the catalyst is desorbed.

In order to solve the above-mentioned problems of the prior art, the present invention provides a deodorizing element having improved thermal shock resistance and corrosion resistance by using an appropriate pipe material.

In view of the above problems, a first object of the present invention is to provide a deodorizing element having an improved adhesion between a fin and a low-melting hollow layer, the fin being formed by biting a pipe on a sheath heater. It is to be.

A second object is to provide a deodorizing element having improved corrosion resistance and mechanical strength of a fin formed by biting a pipe on a sheath heater.

A third object of the present invention is to provide a deodorizing element having improved corrosion resistance and heat conductivity of fins formed by biting a pipe on a sheath heater.

[0010]

Means for achieving the first object of the present invention is as follows.
5%, Fe 8% or less, Mg and Mn 0.1% each
Hereinafter, a plate material formed with an aluminum alloy layer in which other metal is 1.0% or less and the balance is Al is processed into a pipe shape and cut into a predetermined dimension, and the pipe is a sheath heater. A low melting hollow layer is formed on this a-type metal fin which is bitten like a fin, and a deodorizing catalyst is provided on the surface thereof.

The means for achieving the second object is to add 0.5 to 13.5% Si and 8% Fe to the stainless steel base material.
Hereinafter, a plate material on which an aluminum alloy layer in which Mg and Mn are each 0.1% or less, the other metal is 1.0% or less, and the balance is Al is processed into a pipe shape and cut into a predetermined size. Then, a low melting hollow layer is formed on this b-type metal fin in which the pipe is bitten by a sheath heater in a fin shape, and a deodorizing catalyst is provided on the surface thereof.

A means for achieving the third object is that a clad plate made of stainless steel and aluminum is processed into a pipe shape, cut into a predetermined size, and the pipe is fin-shaped on a sheath heater. The low-melting hollow layer is formed on the c-type metal fin that has been bitten on the surface, and a deodorizing catalyst is provided on the surface thereof.

[0013]

The means for achieving the first object of the deodorizing element of the present invention is that the catalyst layer provided on the low-melting hollow layer of the a-type metal fin is changed from a gas containing a malodor due to its catalytic action. It acts to oxidize and decompose these malodorous substances,
Prevent the rise of the concentration of malodorous substances in the room.

Further, since the sheath heater and the a-type metal fin are integrated, the catalyst layer provided on the a-type metal fin through the hollow layer by energization of the sheath heater. The temperature rapidly rises due to heat conduction from the sheath heater, the decomposition activity of the catalyst is further increased, and the malodor is further removed.

Moreover, the heating of the catalyst layer is not indirect heating,
Since it is directly heated, the heat loss is very small.

The a-type metal fins increase the effective area of the catalyst layer to increase the amount of the catalyst, strengthen the catalytic action, and more reliably remove the malodor. . Further, the a-type metal fin has an iron base material containing 13.5% or less of Si, 8% or less of Fe, Mg, and M.
A plate material formed with an aluminum alloy layer in which n is 0.1% or less, 1.0% or less of other metals, and the balance is Al, and processed into a pipe shape. An iron base material and an aluminum alloy Since the layers are strongly bonded by the Alfin alloy (Si-Fe), they do not separate even when subjected to thermal shock. Also, the adhesion of the low melting hollow layer provided on the aluminum alloy layer is ensured by controlling the addition amount of manganese and magnesium in the material composition of the aluminum alloy layer. And has excellent impact resistance and thermal shock resistance.

Next, the means for achieving the second object of the present invention is to add 0.5 to 13.5 Si to the stainless steel base material.
%, Fe 8% or less, Mg and Mn 0.1% or less, other metals 1.0% or less, and the balance being Al, the plate material formed into a pipe shape. Is cut to the specified size, and the pipe is
A low melting hollow layer is formed on this b-type metal fin, which is bitten in a fin shape, and a deodorizing catalyst is provided on the surface thereof. In particular, a stainless steel material is used as the base material of the b-type metal fin. Since it is used, it is not corroded even when it is exposed to a corrosive malodorous gas, and has a higher mechanical strength than an iron base material, and acts to withstand long-term use.

The means for achieving the third object is to cut a clad plate made of stainless steel and aluminum into a pipe shape and cut it into a predetermined size, and the pipe is fin-shaped on a sheath heater. A low melting hollow layer is formed on this c-type metal fin that has been bitten on the surface of the c-type metal fin, and a deodorizing catalyst is provided on the surface of the c-type metal fin. Since it is used, it does not corrode even when exposed to a corrosive malodorous gas, like the means for achieving the second object, and acts to withstand long-term use. Further, in the case of the clad material, the plate thickness of the aluminum can be freely controlled, so that the plate thickness can be selected according to the application, and the heat conduction can be further enhanced.

[0019]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 (a) is a block diagram of the deodorizing element,
(B) is sectional drawing, (c) is an expanded principal part sectional view of a deodorizing part. 1 is a 100V-250W series heater, 2
Is an a-type metal fin, 3 is a low melting hollow layer, and 4 is a deodorizing catalyst layer. The a-type metal fin 2 forms the main part of claim 1 of the present invention, and the iron base 2a contains 0.5 to 1 Si.
3.5%, Fe 8% or less, Mn and Mg 0.
1% or less, 1.0% or less of other metals, and the balance being Al, the plate material on which the aluminum alloy layer 2b is formed is processed into a pipe shape and cut into a predetermined size. It is a fin-shaped bite.

As the iron base material 2a, preferably, C is 0.
Low carbon steel of 1% or less is good, but in the present invention,
SPCC which is a normal steel plate was applied.

The thickness of the aluminum alloy layer 2b is 10 to 10.
It is set in the range of 40 μm. As a chemical component, S
Although the addition amount of i is limited to 0.5 to 13.5%, as is clear from Table 1, if it exceeds this, corrosion resistance and hot water flowability are extremely deteriorated. If it is 0.5% or less, the iron base material 2
Adhesion with a deteriorates. It was preferably 6 to 8%. The effect of adding Si is that Si-
Fe alloy 2c is generated to function to firmly bond the aluminum alloy layer 2b and the iron base material 2a, and
It is effective in that it has the effect of lowering the expansion coefficient.

[0022]

[Table 1]

Mn and Mg are components that hinder the bond between the low melting hollow layer 3 and the aluminum alloy layer 2b, and it is better not to contain them. However, as is clear from Tables 2 and 3, as impurities, Even if mixed, it must be suppressed to 0.1%.

[0024]

[Table 2]

[0025]

[Table 3]

Fe is contained in the dissolution bath of the aluminum alloy during the process of forming the aluminum alloy layer 2b on the iron substrate 2a. As is clear, if the Fe content exceeds 8%, a problem occurs in corrosion resistance.

[0027]

[Table 4]

As described above, in the first embodiment of the present invention,
By limiting the chemical composition of the aluminum alloy layer 2b of the a-type metal fin 2, the a-type metal fin 2 and the low melting hole
(B) The adhesion of the layer is improved. Further, the a-type metal fin also has the function of increasing the effective area of the deodorizing catalyst layer.

Next, an example of a method of forming the low melting hollow layer 3 will be described. The low melting hollow layer 3 has a two-layer structure,
The underlayer first layer is referred to as GC (ground coat) 3a, and the upper second layer is referred to as TC (top coat) 3b. As a raw material for the holo, if expressed in terms of weight ratio, the GC is 70 for the frit (M117) made by Kanto enamel, whereas the frit made by Nippon Ferro (4303M) 30, the titanium oxide made by Nippon Ferro (FA55W) 10, Nippon Ferro Clay 1, Nippon Kagaku Water Glass (S-40) 14.2, and water mixed at a ratio of 46.8 were used, and TC was similarly frit (M117) 80 and frit ( 4303M) 20, Sumitomo Chemical's alumina (A21) 15, titanium oxide (FA55
W) 10, clay (No. 11) 2, water glass (S-40) 2
A mixture of 0.8 and 47.2 of water is used. The mixing and milling were carried out in a 3.6-liter pot mill, and the milling time was set to GC2 hours and TC1 hour as a standard, and the residue of the mixture slurry-50 ml on 380 mesh was GC7.5 ± 1 g, TC13. The time is adjusted to be within ± 3g.

These slurries are spray-applied to a sheath heater 1 having an a-type metal fin 2 as shown in FIG. 1 by spraying. First, GC is applied and dried in the range of 40 to 50 ° C. for 10 minutes. After the GC drying, TC is applied and dried in the same manner. 550-560 after TC drying
The low melting hollow layer 3 is formed by firing at 10 ° C. for 10 minutes. In this embodiment, the coating amount is about 100 ± 10 GC with a hollow film thickness.
The control is carried out so as to fall within the range of μ and TC20 ± 4μ.

Next, an example of a method for producing the deodorizing catalyst 4 will be described. Here, a catalyst having an adsorption function in addition to the usual decomposition function of the catalyst was prepared and carried.

200 g of colloidal silica, 400 g of copper ion exchange type zeolite, 800 g of water, chloroplatinic acid were added to Pt.
30 g, and Pd is 15 g of palladium chloride,
And an appropriate amount of hydrochloric acid is added and mixed well using a ball mill.

This slurry is similarly sprayed to the above hose.
B. Spray on a sheath heater with a carrying fin. 100 ° C
After drying for 2 hours at 390 ° C. to 400 ° C. for 1 hour, the deodorizing catalyst layer 4 is formed. In this embodiment, the coating amount was 15 g per one.

As described above, according to the present invention, impact resistance, thermal shock resistance, adhesion of catalyst layer, corrosion resistance, thermal conductivity,
It is possible to provide a deodorizing element having improved catalytic activity and the like.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. The structure of the deodorizing element is almost the same as that of the first embodiment, but the structure of the metal fin is different from that of the first embodiment. As shown in FIG. 2, the b-type metal fin 5 is obtained by cutting a plate material, which is formed by forming an aluminum alloy layer 5b similar to that of the first embodiment on a stainless steel base material 5a, into a pipe shape and cutting it into a predetermined size. , The sheath heater 1 is bitten into a fin shape, and the low melting hollow layer 3 made of GC3a and TC3b is formed on the b-type metal fin 5.
Further, the deodorizing catalyst layer 4 is provided on the surface thereof.

In the second embodiment of the present invention, SUS436L was used as the stainless steel base material, but austenite type and other ferrite type stainless steel materials can also be applied.
The low melting hollow layer 3 and the deodorizing catalyst layer 4 were manufactured by the same method as in Example 1. As described above, according to the second embodiment of the present invention, the corrosion resistance of the base material is significantly improved, and the mechanical strength and heat resistance are also improved, as compared with the first embodiment.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to FIG. The structure of the deodorizing element is almost the same as that of the first embodiment, but the structure of the metal fin is different from that of the first embodiment. As shown in FIG. 3, the c-type metal fin 5 is obtained by cutting a clad plate material 6 made of stainless steel 6a and aluminum 6b into a pipe shape, and cutting the pipe into a predetermined size. The low melting hollow layer 3 made of GC3a and TC3b is formed on the c-type metal fin 5, and the deodorizing catalyst layer 4 is further provided on the surface thereof.

In the third embodiment of the present invention, stainless steel 6 is used.
As a, NAR-160 (made by Sumitomo Metals) having a plate thickness of t0.2 was used, but austenitic and other ferritic stainless materials can also be applied. As the aluminum 6b, a clad plate was manufactured using a JIS standard, 1100, plate thickness of t1.0. The low melting hollow layer 3 and the deodorizing catalyst layer 4 were manufactured by the same method as in the first embodiment.

As described above, according to the second embodiment of the present invention, the corrosion resistance of the base material is greatly improved and the mechanical strength and heat resistance are also improved as compared with the first embodiment. It was

[0040]

According to the first means of the present invention, the catalyst layer provided on the low melting hollow layer of the a-type metal fin oxidizes and decomposes the malodorous substance from the gas containing the malodor by its catalytic action. To prevent the concentration of malodorous substances in the room from rising.

Further, since the sheath heater and the a-type metal fin are integrated, the catalyst layer provided on the a-type metal fin via the hollow layer by energization of the sheath heater. The temperature rapidly rises due to heat conduction from the sheath heater, the decomposition activity of the catalyst is further increased, and the malodor is further removed.

The heating of the catalyst layer is not indirect heating,
Since it is directly heated, the heat loss is very small.

The a-type metal fins increase the effective area of the catalyst layer to increase the amount of the catalyst, strengthen the catalytic action, and more reliably remove the malodor. . Further, the a-type metal fin has an iron base material containing 13.5% or less of Si, 8% or less of Fe, Mg, and M.
A plate material formed with an aluminum alloy layer in which n is 0.1% or less, 1.0% or less of other metals, and the balance is Al, and processed into a pipe shape. An iron base material and an aluminum alloy Since the layers are strongly bonded by the Alfin alloy (Si-Fe), they do not separate even when subjected to thermal shock. Also, the adhesion of the low melting hollow layer provided on the aluminum alloy layer is ensured by controlling the addition amount of manganese and magnesium in the material composition of the aluminum alloy layer. And has excellent impact resistance and thermal shock resistance.

Next, the second means of the present invention is to add 0.5 to 13.5% of Si and 8% or less of Fe to a stainless steel substrate,
Mg and Mn are each 0.1% or less, other metals are 1.0% or less, and the balance is aluminum, and a plate material formed with an aluminum alloy layer is processed into a pipe shape and cut into predetermined dimensions. A low melting hollow layer is formed on the b-type metal fin, which is obtained by biting the pipe into a sheath heater in a fin shape, and a deodorizing catalyst is provided on the surface thereof. Since a stainless steel material is used as the base material of the fin,
Even if exposed to corrosive malodorous gas, it will not be corroded,
Further, it has a higher mechanical strength than the iron base material and acts so as to withstand long-term use.

A third means of the present invention is that a clad plate made of stainless steel and aluminum is processed into a pipe shape, cut into a predetermined size, and the pipe is bitten by a sheath heater into a fin shape. In addition, a low melting hollow layer is formed on this c-type metal fin, and a deodorizing catalyst is provided on the surface thereof.
Since the clad material of stainless steel and aluminum is used as the base material of the metal fin, it is not corroded even when exposed to a corrosive malodorous gas as in the case of the means for achieving the second object. Acts to withstand long-term use. Further, in the case of the clad material, the plate thickness of the aluminum can be freely controlled, so that the plate thickness can be selected according to the application, and the heat conduction can be further enhanced.

[Brief description of drawings]

1A is a perspective view of a deodorizing element of the present invention, FIG. 1B is a sectional view of a deodorizing element of the present invention, and FIG. 1C is a sectional view of a main part of the deodorizing element of the present invention.

FIG. 2 is a cross-sectional view of essential parts showing a second embodiment of the present invention.

FIG. 3 is a cross-sectional view of essential parts showing a third embodiment of the present invention.

[Explanation of symbols]

 1: Seed heater 2: a-type metal fin 3: low melting hollow layer 4: deodorizing catalyst 5: b-type metal fin 6: c-type metal fin

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location F24F 1/00 (72) Inventor Hiroshi Kuwamura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Tsuneo Shibata 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 1006 Kadoma, Kadoma-shi, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (3)

[Claims] 1. An iron base material containing 0.5 to 13.5% of Si,
Fe is 8% or less, Mg and Mn are each 0.1% or less,
A plate material formed by forming an aluminum alloy layer in which the amount of other metal is 1.0% or less and the balance being Al is processed into a pipe shape and cut into a predetermined size, and the pipe is finned to a sheath heater. Deodorizing element that is bitten like a wire, has a low melting hollow layer formed on this fin, and has a deodorizing catalyst on its surface. 2. A stainless steel substrate containing 0.5 to 1 Si.
3.5%, Fe 8% or less, Mg, Mn 0.
1% or less, 1.0% or less of other metals, and the balance being Al, the plate material on which an aluminum alloy layer is formed is processed into a pipe shape and cut into a predetermined size.
A deodorizing element in which a fin is bitten on a heater, a low melting hollow layer is formed on the fin, and a deodorizing catalyst is provided on the surface thereof. 3. A stainless steel and aluminum clad plate material processed into a pipe shape and cut into a predetermined size,
A deodorizing element in which the pipe is bitten by a sheath heater in a fin shape, a low melting hollow layer is formed on the fin, and a deodorizing catalyst is provided on the surface.