JP4789364B2 - Car air conditioner duct - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle air conditioner duct made of pulp mold that is disposed between an air conditioner body and a blowout port.
[0002]
[Prior art and problems to be solved by the invention]
Conventionally, plastics integrally molded by blow molding have been used for in-vehicle air conditioner ducts.
However, with the background of environmental problems, it has been desired to reduce the use of plastic parts, and in-vehicle air conditioner ducts have been demanded to be made of materials that can replace plastics.
[0003]
The technology described in Japanese Patent Laid-Open No. 9-2046 pulverizes a waste paper material coated with a thermoplastic resin, melt-molds a raw material composition in which conductive fibers and an antibacterial material are mixed, and performs a desired process. It is intended to obtain automobile parts.
However, in this technique, since a mat-shaped molding material is formed from the raw material composition and then formed into a desired shape by heating and pressing, it is difficult to mold a molded body having a complicated shape.
[0004]
Accordingly, an object of the present invention is to provide a pulp mold-made in-vehicle air conditioner duct that is excellent in discardability, lightweight, seamless, and can be manufactured at low cost.
[0005]
[Means for Solving the Problems]
The present invention includes a first connection port connected to an air conditioner body, a second connection port connected to a cooling / warming air blowing port, and a ventilation path connecting the connection ports, and the air conditioner body and the blowing port. An air conditioner duct made of pulp mold disposed between a mouth and a plurality of pulp laminates are integrally formed by joining at joint surfaces that are not on the same plane. The connection port 2 is formed in a substantially rectangular opening shape, and an attachment flange portion having a screw hole is formed on the outer periphery of the first connection port, and is attached to the outer periphery of the second connection port. The above-described object is achieved by providing a duct for an in-vehicle air conditioner, in which a rib for use is formed, and the air passage has a bent portion and a twisted portion in the middle thereof and is formed so that the cross-sectional shape is partially different. It is a thing.
[0006]
In addition, the present invention has a pair of connection ports connected to the air conditioner body, another pair of connection ports connected to the pair of cooling / heating air outlets, and a pair of air passages connecting the connection ports. And an air conditioner duct made of pulp mold disposed between the air conditioner main body and the pair of outlets, wherein a plurality of pulp laminates are joined and formed integrally in a substantially bilaterally symmetrical manner. The pair of air passages achieve the above object by providing a duct for an in-vehicle air conditioner having a bent portion in the middle and formed in parallel with each other.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings.
[0008]
FIG. 1 schematically shows a first embodiment of a duct for an in-vehicle air conditioner according to the present invention. In FIG. 1, the code | symbol 1 has shown the duct for vehicle-mounted air conditioners (henceforth only a duct).
[0009]
As shown in FIG. 1, the duct 1 includes a connection port (first connection port) 2 connected to an air conditioner body (not shown), and a blowout of cool / warm air arranged at a predetermined position in a vehicle such as a dashboard. It has a connection port (second connection port) 3 connected to a port (not shown) and a ventilation path 4 connecting these connection ports 2 and 3, and is arranged between the air conditioner main body and the outlet. It is the duct for vehicle-mounted air conditioners made from a pulp mold.
[0010]
The duct 1 is integrally formed by joining two pulp laminates 10 and 10 at a joining surface (not shown) that is not on the same plane. In the present embodiment, the pulp laminates 10 and 10 are joined at opposing ridges 40 (only one ridge is shown in FIG. 1) in the air passage 4.
[0011]
The connection port 2 has an opening shape that is substantially rectangular. An attachment flange portion 20 having a screw hole 21 is formed on the outer periphery of the connection port 2. The connection port 2 is connected to a blower port (not shown) of the air conditioner body.
[0012]
The connection port 3 has a substantially rectangular opening shape. An attachment rib 30 is formed on the outer periphery of the connection port 3. The connection port 3 is connected to a cooling / warming air outlet (not shown) arranged on a dashboard such as a side defroster or a side register.
[0013]
The air passage 4 has a bent portion 5 and a twisted portion 6 in the middle thereof, and is formed so that the cross-sectional shape is partially different.
Next, a method for manufacturing the duct 1 will be described.
In the manufacturing process of the duct 1, a pair of split molds each including a cavity forming surface, a flow hole opening in the cavity forming surface, and a papermaking net covering the cavity forming surface are combined to form the duct 1. A papermaking mold (manufacturing mold) in which a cavity corresponding to the outer shape is formed is used. The split mold is formed so that the butted surfaces are not on the same plane.
[0015]
The flow holes are gathered into one flow hole in the split mold, and the openings of the flow holes are connected to a conduit that leads to suction means such as a suction pump. In addition, flow grooves are formed on the formation surface of the cavities so as to connect the flow holes, and moisture in the pulp slurry is smoothly discharged to the outside through the flow holes during papermaking and dewatering. .
[0016]
The papermaking net is made of metal or plastic and has an opening of 24 mesh.
[0017]
The split mold having such a configuration is immersed in the pulp slurry in the pool holding the pulp slurry, and the pulp slurry is sucked through the distribution holes of the split mold in the pulp slurry, A pulp laminate is made by depositing pulp fibers.
[0018]
As the pulp slurry, a mixture of only 0.5% by weight of pulp fibers and water and an appropriate amount of activated carbon having a deodorizing effect is used.
[0019]
Next, after the pulp laminate is formed on the papermaking net, a split mold in which the pulp laminate is made is combined, and a rubber tube-shaped core is disposed in the formed cavity.
[0020]
After the core is disposed in the cavity, dehydration is performed. In the dehydration process, air is supplied to the core, the core is expanded, the pulp laminate is pressed against the inner surface of the papermaking mold, the pulp laminates are joined while being dehydrated, and integrated to form the duct 1. To do.
The pressure for supplying air into the core is preferably 0.1 to 0.2 MPa.
[0021]
In the dehydration step, the core is bulged and the duct 1 is pressed against the inner surface of the papermaking mold, while the moisture in the duct 1 is continuously sucked and dehydrated through the flow hole.
[0022]
When the duct 1 can be dehydrated to a moisture content of 50 to 60%, the negative pressure suction through the flow hole is stopped and the air in the core is discharged to contract the core. Then, the split mold is opened to release the wet duct and core from the papermaking mold.
[0023]
After the dehydration of the duct 1 is finished, the core is removed from the duct 1 and the duct 1 is dried with a dryer. The drying temperature is preferably 60 to 80 ° C.
[0024]
After finishing the drying process, various processes such as a trimming process and a printing process are performed as necessary to complete the manufacture of the duct 1.
[0025]
The duct 1 of this embodiment manufactured in this way is lightweight, seamless, and has a performance equivalent to that of conventional plastics. Moreover, since the duct 1 is provided with high sound absorption, it is excellent also in the silencing effect of the sound resulting from ventilation. Moreover, since it is a product made from a pulp mold, it can be manufactured at a low cost and is excellent in discardability, so it is suitable for environmental problems.
[0026]
FIG. 2 shows a second embodiment of the duct for an in-vehicle air conditioner according to the present invention. In the figure, reference numeral 11 denotes an in-vehicle air conditioner duct (hereinafter also simply referred to as a duct).
[0027]
The duct 11 has a pair of connection ports 12 and 12 connected to an air conditioner main body (not shown), and another pair of connection ports 13 and 13 connected to a pair of cooling / heating air outlets (not shown). And an air conditioner duct made of pulp mold having a pair of air passages 14, 14 connecting the connection ports 12, 12, 13, 13, and disposed between the air conditioner body and the pair of outlets. It is.
[0028]
The duct 11 is integrally formed in a substantially bilaterally symmetrical manner by joining two pulp laminates 110 at diagonal ridges 140 in the pair of flow passages 14.
[0029]
A flange portion 120 for attachment is formed on the outer periphery of the connection port 12. The connection port 12 is connected to a blower port (not shown) of the air conditioner body.
[0030]
The connection port 13 is surrounded by a single connection port 130, and fixing pieces 132 having insertion holes 131 are formed on both sides of the connection port 130 (only one is shown in FIG. 2).
The connection port 13 is connected to a pair of cool and warm air outlets (not shown) arranged on a dashboard such as a center register.
[0031]
The air passage 14 has a bent portion 141 bent in a substantially S shape in the middle thereof and is formed in parallel to each other.
[0032]
The duct 11 is manufactured by performing wet papermaking of the pulp laminate, dehydration and drying of the duct in the same manner as the duct 1 except that a split mold, a core, and a dry mold corresponding to the shape of the duct 11 are used. be able to.
[0033]
The duct 11 of the present embodiment manufactured in this way is excellent in discardability, lightweight, seamless, and has the same performance as that of conventional plastics, like the duct 1. Moreover, since it has high sound absorption, it is excellent also in the silencing effect of the sound resulting from ventilation. Moreover, since it is a product made from a pulp mold, it can be manufactured at a low cost and is excellent in discardability, so it is suitable for environmental problems.
[0034]
The present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the present invention.
[0035]
The duct of the present invention mixes and beats acrylic fibers into a slurry containing esterified pulp, and after obtaining a desired slurry, it is made into a predetermined shape in the same manner as in the above embodiment, and after dehydration and drying, It shall have high heat resistance and high water resistance by providing a sodium silicate layer or / and silicon resin layer by applying sodium silicate (water glass) or / and silicon resin on the surface. You can also.
The esterified pulp is, for example, phosphoric acid-based cellulose fiber or phosphoric acid obtained by esterifying synthetic fibers such as natural cellulose, its derivatives or polyvinyl alcohol as disclosed in Japanese Patent Application No. 52-5200. Polyvinyl alcohol fiber and the like. Such esterified pulp is prepared by, for example, dissolving a few percent of urea in an aqueous solution in which ammonium phosphate is obtained by reacting natural cellulose as a raw material, a derivative thereof, or synthetic fibers such as polyvinyl alcohol with urea and phosphoric acid. It can be obtained by immersing in a phosphoric acid esterification solution and allowing it to stand for a predetermined time, then squeezing and drying, heating to an esterification reaction temperature (about 140 ° C.) and cooling at room temperature after the reaction.
[0036]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the duct for vehicle-mounted air conditioners made from a pulp mold which is excellent in discardability, is lightweight, is seamless, and can be manufactured cheaply is provided.
[Brief description of the drawings]
FIG. 1 is a perspective view schematically showing an embodiment of a duct for an on-vehicle air conditioner according to the present invention.
FIG. 2 is a perspective view schematically showing an embodiment of a duct for an in-vehicle air conditioner according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 11 Car air-conditioning air duct 2, 3, 12, 13 Connection port 4,14 Air flow path 5,141 Bending part 6 Twisted part 20 Flange part 21 Screw hole 30 Rib

Claims (2)

A first connection port connected to the air conditioner main body, a second connection port connected to the cooling / warming air outlet, and a ventilation path connecting these connection ports, between the air conditioner main body and the air outlet It is a duct for in-vehicle air conditioner made of pulp mold,
A plurality of pulp laminates are joined and integrally molded at a joint surface that is not on the same plane,
The first and second connection ports have a substantially rectangular opening shape, and an attachment flange portion having a screw hole on the outer periphery of the first connection port. The second connection port A mounting rib is formed on the outer periphery of the mouth,
The air-conditioning duct has a bent portion and a twisted portion in the middle thereof, and is formed so that a cross-sectional shape is partially different. A pair of connection ports connected to the air conditioner body, another pair of connection ports connected to the pair of cooling / warming air outlets, and a pair of air passages respectively connecting these connection ports; A duct for in-vehicle air conditioner made of pulp mold arranged between a pair of the outlets,
A plurality of pulp laminates are joined and formed integrally in a substantially symmetrical manner,
The pair of air passages have a bent portion in the middle thereof and are formed in parallel with each other.

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