JPH0812006B2 - Air conditioning equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioner such as an air conditioner or an air purifier.

2. Description of the Related Art Conventionally, an air conditioner such as an air conditioner is provided with a filter for removing in order to remove dust and odor of an air conditioning atmosphere as well as an original function of the device such as cooling and heating. These are roughly classified into two types: (1) those that electrostatically trap charged dust particles in a filter, and (2) those that adsorb fine particles and gas molecules such as odors and cigarette smoke by activated carbon. To be done. Depending on the type of gas adsorbed on the activated carbon, amine compounds or acid compounds are pre-impregnated on the activated carbon to control the pH of the activated carbon to give adsorption selectivity.

FIG. 3 is a schematic view of a conventional air conditioner, in which an electrostatic dust trap such as filedone is attached to the front suction part 23 of the indoor air blower 21 of the air conditioner, which includes a compressor part 20, an indoor air blower 21, and a connecting part 22. 24 and a filter 25 carrying activated carbon are disposed, and the dirty indoor air 26 passes through these filters and is sucked, cooled or heated in the compressor unit 20 and again as clean air 27 from the blow-out port 28 into the room. Sent out.

Problems to be Solved by the Invention Such a conventional filter system for an air conditioner has the following problems.

A filter that electrostatically captures dust has a lower capture capability as the capture amount increases, and also causes a large pressure loss with respect to suction, which interferes with the operation of the air conditioner. Further, when gas molecules such as tobacco are adsorbed by activated carbon, it is necessary to periodically replace the activated carbon filter due to the gas adsorption limit amount due to the specific surface area of activated carbon. As a result,
It is necessary to replace the filter of the present air conditioner about once a year, and it can be said that no measures are taken from a long-term standpoint to remove the bad odor in the atmosphere.

In recent years, due to the demand for airtight housing and high-quality air conditioning, removal of unpleasant odors in living spaces is becoming an essential function that air conditioning equipment must have. At present, a deodorizing device that is technically satisfying such market demand has not been developed. The present invention is intended to provide an air conditioner and an air purifier having a deodorizing function in view of such problems.

Means for Solving the Problems The present invention is an air conditioner characterized by comprising a deodorizing catalyst body integrally formed on the surface of a heating portion without interposing an air layer.

Effect According to the present invention, the removal function is retained for a very long period because fine particles such as cigarette smoke and gas molecules are removed by oxidative decomposition with a heated catalyst, not by conventional adsorption removal. It Therefore, it is unnecessary to periodically replace the filter, and there is no odor remaining due to the selectivity of the adsorbed gas species unlike activated carbon, and all unpleasant odors in the living space are removed.

Example FIG. 1 shows a basic configuration diagram of an air conditioner of the present invention. A catalyst 5 is arranged in a front suction part 4 of an indoor air blower 2 of an air conditioner including a compressor part 1, an indoor air blower 2, and a connecting part 3. The catalyst 5 may be provided with a heating portion depending on the activation temperature of the catalyst used and the type of target gas molecule. Specific examples of the present invention will be shown below.

(Example-1) An air conditioner having the configuration shown in FIG. However, the catalyst 5 used has the structure shown in FIG. The quartz tube 11 contains the nichrome wire 10 and the catalyst coating layer 12 on the surface of the quartz tube 11, and 13 and 14 are insulators. The composition and forming method of the catalyst coating layer will be described below.

Activated alumina powder 1000g, colloidal alumina 1000g with alumina content 10wt%, aluminum nitrate 9 hydrate 100
g, 1000 g of silica content 20 wt% colloidal silica, water 12
00g and 30g of chloroplatinic acid as Pt, palladium chloride
A slurry was prepared by adding 15 g of Pd and thoroughly mixing with a ball mill. This slurry is coated on the surface of a quartz tube having an outer diameter of 10 mm, an inner diameter of 9 mm and a length of 15 cm by a spray method, dried at 100 ° C. for 2 hours, and then calcined at 500 ° C. for 1 hour to form a quartz tube having a catalyst coating layer. Then, a heating element of the present invention was prepared using this, a nichrome wire as an electric resistor, and an insulator. The catalyst coating layer amount was 0.2 g, and the platinum group metal contents were Pt5.12 mg and Pd2.56 mg.

When the nichrome wire 10 is energized, heat rays are radiated from the nichrome wire 10 in the entire circumferential direction. At this time, the catalyst coating layer 12 is a quartz tube.
Since it is installed so as to cover the entire outer circumference of 11, the heat rays radiated from the nichrome wire 10 in the entire circumferential direction are all radiated to the catalyst coating layer 12, and the radiant heating of the catalyst coating layer 12 is efficiently performed, The catalyst can be heated to its activation temperature in a short time, and the temperature of the catalyst coating layer 12 can be raised to a high temperature.

Since the catalyst also heats the air near the catalyst, a convective air flow is generated in the vicinity. Then, when this air flow comes into contact with the catalyst coating layer heated to the activation temperature by heating from the nichrome wire or diffuses into the coating layer, odors and harmful components contained in the air near the catalyst, for example, one Carbon oxide (below
CO), ammonia, and tobacco smoke components are purified by catalytic action.

Instead of the nichrome wire of the present invention, a coiled metal wire such as a tantalum wire may be used as it is, or a tungsten wire may be enclosed in a quartz tube together with an inert gas such as argon. The heating portion of the catalyst body can be a flat plate heat source as well as the linear heater as in the embodiment.

The high temperature exhaust heat discharged during the operation of the air conditioning compressor may be used as a heat source for heating the catalyst.

The catalyst coating layer of the present invention contains silica. By including silica in the catalyst coating layer, the adhesion of the catalyst coating layer to the quartz tube can be strengthened.

The silica content of the present invention is 6-40 wt% in the catalyst coating layer.
It is desirable that When the content of silica exceeds 40 wt%, the catalyst coating layer is likely to be cracked, resulting in poor adhesion. If the content is less than 6% by weight, a sufficient effect of improving the adhesion properties of silica cannot be obtained.

The specific surface area of the catalyst coating layer of the present invention is preferably 10 m ² / g or more. This is because as the specific surface area of the catalyst coating layer increases, the far-infrared radiation amount ratio compared to the amount of near-infrared radiation emitted increases, but the specific surface area is 10 m ² / g or more and a sufficient far-infrared radiation ratio is This is because it can be obtained.

It is desirable that the catalyst coating layer of the present invention contains cerium oxide. By including cerium oxide in the catalyst coating layer, the heat resistance of the catalyst layer can be improved, and the catalytic oxidation activity for hydrocarbon compounds can be improved.

The content of cerium oxide of the present invention is 5 to 5 in the catalyst coating layer.
30 wt% is desirable. The content of cerium oxide
If it exceeds 30 wt%, the heat resistance of the catalyst coating layer deteriorates, and
If it is less than 5 wt%, a sufficient effect of adding cerium oxide cannot be obtained.

It is desirable to include barium oxide in the catalyst coating layer of the present invention. By including barium oxide in the catalyst coating layer, the heat resistance of the catalyst layer can be improved.

The content of barium oxide of the present invention is 1 to 1 in the catalyst coating layer.
It is preferably 10 wt%. Barium oxide content
If it exceeds 10 wt%, the adhesion property of the catalyst coating layer will deteriorate, and
If it is less than 1 wt%, a sufficient effect of adding barium oxide cannot be obtained.

The same effect can be obtained by using barium carbonate instead of barium oxide of the present invention. The desirable amount of barium carbonate added is 1 to 10 wt% in terms of barium oxide.
Is.

It is desirable that the catalyst coating layer of the present invention contains titanium oxide. By including titanium oxide in the catalyst coating layer, the catalytic oxidation activity for nitrogen compounds such as ammonia can be improved.

The content of titanium oxide of the present invention is 4 to 30 in the catalyst coating layer.
It is desirable to be wt%. Titanium oxide content is 30wt
%, The adhesion property of the catalyst coating layer deteriorates, and 4 wt%
If it is less than%, a sufficient effect of adding titanium oxide cannot be obtained.

The specific surface area of the catalyst coating layer of the present invention is preferably 10 m ² / g or more. This is because as the specific surface area of the catalyst coating layer increases, the far-infrared radiation amount ratio compared to the amount of near-infrared radiation emitted increases, but the specific surface area is 10 m ² / g or more and a sufficient far-infrared radiation ratio is This is because it can be obtained.

When forming the catalyst coating layer of the present invention, it is desirable to roughen the surface of the quartz tube and then provide the catalyst coating layer, or to sufficiently degrease the surface of the quartz tube and then provide the catalyst coating layer. With this manufacturing method, the adhesion between the heating element and the catalyst coating layer can be improved.

Various methods can be used for the catalyst coating layer forming method of the present invention. For example, there are spray coating, dip coating, electrostatic coating, roll coating, and screen printing.

The median particle diameter of the particles in the mixed slurry of the present invention is 1 μm.
As described above, the thickness is preferably 9 μm or less. If it exceeds 9 μm, the coating layer becomes soft, and if it is thinner than 1 μm, the coating layer tends to crack.

The silica of the present invention is silicon dioxide, but silicic acid may be used instead.

In the embodiments of the present invention, an air conditioner has been described as an example, but it is also within the scope of the present invention to add the function of the present invention to an air purifier.

EFFECTS OF THE INVENTION As described above, according to the present invention, an unpleasant odor such as atmospheric odor and cigarette smoke is purified and removed by a catalytic action,
You can get air conditioners and air purifiers that create a comfortable environment.

[Brief description of drawings]

FIG. 1 is a basic block diagram of an air conditioner according to an embodiment of the present invention, FIG. 2 is a block diagram of a catalyst used in the air conditioner, and FIG. 3 is a block diagram of a conventional air conditioner. DESCRIPTION OF SYMBOLS 1 ... Compressor part, 2 ... Indoor ventilation part, 3 ... Connection part, 4
... front suction part, 5 ... catalyst.

Front page continuation (72) Inventor Koichi Tachibana 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. References JP-A-63-118557 (JP, A)

Claims (2)

[Claims] 1. An air conditioner comprising a deodorizing catalyst body integrally formed on the surface of a heating unit without an air layer. 2. A deodorizing catalyst body has a quartz tube containing an electric resistor and a catalyst coating layer formed on the surface of the quartz tube and comprising at least activated alumina, silica and a platinum group metal. The air conditioner according to claim 1, which is characterized in that.