JPH10296021A - Deodorizing filter for vehicle air-conditioning equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorizing filter which efficiently deodorizes an exhaust gas and at the same time, is highly water-resistant. SOLUTION: The deodorizing filter for vehicle air-conditioning equipment is of a honeycomb type using unwoven fabric formed in a sheet comprising powder active carbon mixed with a water-resistant fiber. This water-resistant fiber is formed of a synthetic resin, especially nylon, polypropylene, polyester and phenol resins or of a material showing a water absorbing rate of 5% or less. In addition, the powder active carbon is activated with an alkaline substance and is formed in such a way that the grain diameter and the specific surface fall within the range of 5-100 μm and 1000-1500 m<2> /g respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing filter disposed in an air conditioning duct of a vehicle air conditioner for deodorizing passing air.

[0002]

2. Description of the Related Art A conventional deodorizing filter is disclosed in
No. 131118 discloses a deodorizing agent such as a honeycomb structure and granular activated carbon in a non-woven fabric for preventing a decrease in dust collection performance by enclosing a deodorizing agent such as crushed activated carbon in the core. It is constructed by enclosing in.

Further, Japanese Patent Application Laid-Open No. Hei 4-71609 discloses a honeycomb structure in which a gap between mutually overlapped nonwoven fabric sheets is widened to form a honeycomb structure, and a substance to be filtered passes through a large number of eating trunks formed by the honeycomb structure. Then, a filter and a filtration device for reducing the passage resistance of the material to be filtered are disclosed.

[0004]

However, the object of deodorization (odor entering the vehicle interior) of the deodorizing filter mounted on the vehicle air conditioner is an exhaust gas, and the hydrocarbon (the main component of the exhaust gas) is the exhaust gas. Aromatic: toluene, etc., aliphatic: butane, etc.), nitrogen oxides (NOx), sulfur oxides (SOx) and the like. Efficient removal of these components is required for a deodorizing filter mounted on a vehicle air conditioner.

The deodorizing filter mounted on the vehicle air conditioner is different from the one disclosed in the above cited reference or the one for home use, in which the moisture (rainwater,
(E.g., snow) and drain water adhering to the evaporator may be decomposed by absorbing water, so that a material having high water resistance is required.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a deodorizing filter for a vehicle air conditioner which can efficiently deodorize exhaust gas and has high water resistance.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides an air conditioning duct, an outside air introduction port and an inside air introduction port which are opened on the upstream side of the air conditioning duct, and an appropriate selection of the outside air introduction port and the inside air introduction port. An intake door that opens, a blower that sucks air from the outside air inlet and the inside air inlet selected by the intake door and blows the air downstream, and is disposed downstream of the blower and electrically attracts dust. In a vehicle air conditioner having an air purifying means including an adsorbing means and a deodorizing filter for deodorizing passing air, and a temperature controlling means for heating or cooling the passing air, the deodorizing filter includes powdered activated carbon in water-resistant fibers. (Claim 1).

Therefore, according to the present invention, the deodorizing filter is formed by forming a non-woven fabric obtained by mixing powdered activated carbon with water-resistant fiber to form a honeycomb, thereby constituting a means for controlling moisture contained in the outside air and temperature. The above object can be achieved because the decomposition of the deodorizing filter due to the drain water of the evaporator can be prevented and the ventilation resistance can be reduced by forming the filter into a honeycomb shape.

In the present invention, the water-resistant fiber is desirably made of a synthetic resin (Claim 2), particularly, nylon, PP (polypropylene), polyester,
A phenol resin is desirable, and a material having a water absorption of 5% or less is desirable.

Further, in the present invention, the powdered activated carbon is desirably formed by being activated with an alkaline system. By activating activated carbon with an alkaline system, nitrogen oxides (NOx) and sulfur oxides (SOx), which become acidic by absorbing moisture, are easily absorbed and decomposed.

Further, in the present invention, the particle size of the powdered activated carbon mixed into the water-resistant nonwoven fabric is 5 to 100 μm.
m, and the specific surface area of the powdered activated carbon mixed with the water-resistant nonwoven fabric is 1000 to 1500.
It is desirable that it be within the range of m ² / g (claim 4).
Regarding the particle size, activated carbon having a large particle size has a high ventilation resistance, which affects the air volume of an air conditioner, and if the particle size is small, it becomes difficult to mix a large amount. Regarding the specific surface area, if the specific surface area is small, the deodorization rate is low,
This is because, in order to increase the specific surface area, it is necessary to increase the particle size, and it has been confirmed that the upper limit is the maximum specific surface area within the range of the particle size.

[0012]

Embodiments of the present invention will be described below.

An air conditioner 1 for a vehicle shown in FIG. 1 has an air conditioning duct 2, an outside air inlet 3 and an inside air inlet 4 which open at the most upstream side of the air conditioning duct 2, and these outside air inlets 3 and inside air inlets. Intake door 5 that is opened by appropriately selecting 4
A blower 6 arranged downstream of the intake door 5 and sucking air from the outside air inlet 3 or the inside air inlet 4 opened by the intake door 5 to blow the air downstream, and a blower 6 downstream of the blower 6 Air purification means 4 arranged on the side
0, a temperature control means disposed downstream of the air purification means 40, and an outlet (not shown).

The temperature control means includes an evaporator 30 as a cooling means, a heater core as a heating means (not shown), and an air for dividing air passing through the evaporator 30 into air passing through the heater core and air bypassing. It is a mixed door. In addition, a drain port is formed below the evaporator 30 to discharge the condensed water that has adhered to the evaporator 30 and dropped by cooling the passing air.

The air purifying means 40 comprises a charging section (ionizer) comprising a first electrode 8 to which a high-voltage positive voltage is applied from a high-voltage power supply 7 and a second electrode 9 to which a negative voltage is also applied from the high-voltage power supply 7. ) 70, a dust collector (collector) 10 connected to the second electrode 9 and adsorbing the dust charged by the charging unit 70, and a deodorizing filter 20 arranged downstream of the dust collector 10. Composed of

As shown in FIG. 2, the deodorizing filter 20 has a frame 23 formed in a square shape, and a wavy shape formed alternately in the frame 23 to form a honeycomb-shaped ventilation opening 24. First suction unit 21 and flat second suction unit 22
It is composed of

The first and second suction portions 21 and 22 are
It is formed by mixing powdered activated carbon with water-resistant fiber,
By alternately stacking the first suction portions 21 in a wavy shape and the second suction portions 22 in a flat plate shape, the honeycomb-shaped ventilation openings 24 can be formed.

The water-resistant fiber is a fiber made of a synthetic resin such as nylon, PP (polypropylene), polyester, or phenol resin and having a water absorption of 5% or less. The activated carbon powder is obtained by converting activated carbon with an alkaline chemical. Activated, the particle size is 5 to 100 μm, and the specific surface area is 1000 to 1500 m ^2.
/ G.

In the vehicle air conditioner 1 having the above configuration,
The air sucked from the outside air inlet 3 or the inside air inlet 4 by the operation of the blower 6 passes through the charging unit 70 and is charged with dust and the like, and is adsorbed by the dust collecting unit 10. Further, the air that has passed through the dust collecting section 10 is used as a deodorizing filter 2.
At 0, the fine particles that could not be adsorbed by the electric dust collecting section composed of the charging section 70 and the dust collecting section 10 are adsorbed and removed by the activated carbon. As a result, the air in the downstream flow path 50 of the air purification device 40 can be used as clean air.

Specifically, in the case of air sucked from the inside air inlet 4, smoke, dust, sweat odor and the like contained in the air can be removed. In the case of the generated air, it is possible to remove exhaust gas, dust and the like.

Further, since the deodorizing filter 20 is water-resistant, the sudden departure, the sudden stop, the sudden steering wheel, etc. of the vehicle causes the dewdrop water attached to the evaporator 30 to fly, the rainwater, snow, etc. contained in the introduced outside air. Deodorizing filter 2
0 can prevent water-absorbing decomposition and decrease in deodorizing effect due to water absorption.

[0022]

As described above, according to the present invention, a deodorizing filter to be mounted on an air conditioner for a vehicle is formed by mixing activated carbon with fibers having low water absorption, and is further formed into a honeycomb shape. This can prevent degradation due to water absorption and deterioration of deodorizing performance, and can improve the reliability as a deodorizing filter mounted on a vehicle air conditioner.

Also, by activating activated carbon with an alkaline system and limiting the particle size and specific surface area thereof to appropriate values, exhaust gas can be efficiently removed and the comfort in the vehicle interior can be improved. is there.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a front view showing a configuration of a deodorizing filter according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Air conditioning duct 3 Outside air inlet 4 Inside air inlet 5 Intake door 6 Blower 7 High voltage power supply 10 Dust collecting part 20 Deodorizing filter 21 First adsorbing part 22 Second adsorbing part 23 Frame 24 Vent opening Reference Signs List 30 evaporator 40 air purification means 70 charging unit

Claims (4)

[Claims] 1. An air-conditioning duct, an outside air inlet and an inside air inlet opening on the upstream side of the air-conditioning duct, an intake door that selects and opens the outside air inlet and the inside air inlet as appropriate, and the intake door A blower that sucks air from the selected outside air inlet and the inside air inlet and blows the air downstream, a suction device that is arranged downstream of the blower and electrically sucks dust, and deodorizes passing air. In a vehicle air conditioner having an air purifying means composed of a deodorizing filter and a temperature control means for heating or cooling passing air, the deodorizing filter is formed in a honeycomb shape from a nonwoven fabric obtained by mixing powdered activated carbon with water-resistant fiber. A deodorizing filter for a vehicle air conditioner. 2. The deodorizing filter according to claim 1, wherein the water-resistant fiber is made of a synthetic resin. 3. The deodorizing filter according to claim 1, wherein the activated carbon powder is formed by being activated with an alkaline system. 4. The powdered activated carbon has a particle size of 5 to 100 μm.
And the specific surface area of the powdered activated carbon is 1000
Deodorizing filter according to claim 1, 2, or 3 air-conditioning system wherein it is in the range of ~1500m ² / g.