JP2004243816A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle aiming the noise reduction. <P>SOLUTION: The air conditioner for the vehicle is equipped with a blast passage 7, an outside air introduction port 15 communicating to the blast passage, an inside air introduction port 14 communicating to the blast passage, a blower unit 9 which is installed in the blast passage and sucks an inside and outside air through the outside air introduction port and the inside air introduction port, and a filter cleaning the air sucked into the blast passage with the blower unit. The air conditioner for the vehicle is provided with a case 8 for forming the passage which forms the blast passage by surrounding the blower unit, has the bottom surface positioned below the blower unit, and opens so as to form the inside air introduction port. The filter consists of a filter 10A for the inside air and a filter 10B for the outside air, and the filter for the inside air is mounted to the bottom surface of the case for forming the passage. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle air conditioner provided with an air cleaning filter.
[0002]
[Prior art]
FIG. 6 is a sectional view of a main part of a conventional vehicle air conditioner of this type. The air conditioner for a vehicle includes an intake case 102 forming an air passage 101, an outside air inlet 103 communicating with the air passage 101, an inside air inlet 104 communicating with the air passage 101, and a lower end of the intake case 102. The blower unit 105 sucks inside and outside air into the air passage 101 through the outside air inlet 103 and the inside air inlet 104, and a filter 106 that cleans air sucked into the air passage 101 by the blower unit 105. Have.
[0003]
Reference numerals 107 and 108 denote intake doors which rotate about a fulcrum 109 to adjust the ratio of the inside air and the outside air sucked by the blower unit 105. The air sucked into the air passage 101 circulates in the blower case 110 in a scroll shape, and is discharged toward an air conditioner unit (not shown) connected to the blower case 110 (for example, see Patent Document 1 below). .
[0004]
[Patent Document 1]
JP, 2003-11659, A
[Problems to be solved by the invention]
In the above-described conventional vehicle air conditioner, since the filter 106 is disposed in a narrow space between the blower unit 105 and the intake doors 107 and 108 in the intake case 102, the size of the filter 106 is limited, The suction area of the filter 106 cannot be made too large. Therefore, there is a problem that the ventilation resistance of the filter 106 is large and the noise is large.
[0006]
The filter may be provided on the upstream side of the evaporator, but in such a case, there is a similar problem.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle air conditioner that reduces noise.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 includes an air passage 7, an outside air inlet 15 connected to the air passage 7, an inside air inlet 14 connected to the air passage 7, and an air passage 7. A vehicle provided with a blower unit 9 for sucking inside and outside air through an outside air inlet 15 and an inside air inlet 14, and a filter 10 for purifying air drawn into the air passage 7 by the blower unit 9. An air conditioner, comprising a passage forming case (8) surrounding the blower unit (9) to form a ventilation passage (7), a bottom surface of which is located below the blower unit (9) and opened to form an inside air inlet (14); 10 is characterized by comprising an inside air filter 10A and an outside air filter 10B and attaching the inside air filter 10A to the bottom surface of the passage forming case 8.
[0009]
According to a second aspect of the present invention, in the vehicle air conditioner of the first aspect, the passage forming case 8 is formed integrally with the blower case 17.
[0010]
According to a third aspect of the present invention, in the vehicle air conditioner according to the first or second aspect, the passage forming case 8 is formed integrally with the instrument panel 3 and / or the glove box 4. Features.
[0011]
According to a fourth aspect of the invention, in the vehicle air conditioner according to any one of the first to third aspects, the sound absorbing material 11 is provided in the passage forming case 8. .
[0012]
【The invention's effect】
According to the first aspect of the invention, since the inside air filter 10A is attached to the bottom surface of the passage forming case 8 surrounding the blower unit 9, the suction area can be increased. Therefore, ventilation resistance is reduced and noise is reduced.
[0013]
According to the second aspect of the present invention, the mold cost is reduced, and the assembling is facilitated, so that the productivity is improved.
[0014]
According to the third aspect of the present invention, the mold cost is reduced, and the assembling is facilitated, so that the productivity is improved.
[0015]
According to the fourth aspect of the present invention, since the noise is absorbed by the sound absorbing material 11, the noise is further reduced.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a main part of an embodiment of the present invention, and FIG.
[0017]
In FIG. 1, reference numeral 1 denotes an indoor unit of the vehicle air conditioner according to the present embodiment, which is disposed between an instrument panel 3 and a partition wall 2 that partitions a vehicle room from an engine room. A glove box 4 is provided below the instrument panel 3, and the glove box 4 is opened and closed by rotating the lid 5 back and forth about a fulcrum 6.
[0018]
The indoor unit 1 includes a passage forming case 8 that forms an air passage 7, a blower unit 9 that is provided in the air passage 7, and sucks inside and outside air, and a filter 10 that purifies air sucked into the air passage 7 by the blower unit 9. , A sound absorbing material 11 affixed in the passage forming case 8 and intake doors 12 and 13 for adjusting the ratio of inside and outside air sucked by the blower unit 9.
[0019]
The passage forming case 8 has a box shape and surrounds the blower unit 9 to form the air passage 7, and the bottom surface is located below the blower unit 9 and is opened to form the inside air inlet 14. At the bottom of the passage forming case 8, a filter 10A for inside air that covers the entire inside air inlet 14 is attached.
[0020]
An outside air inlet 15 is provided on the upper surface of the passage forming case 8 and on the front side of the vehicle. The outside air inlet 15 communicates with a cowl 16 installed outside the vehicle. Inside the cowl 16, a filter 10B for outside air is attached.
[0021]
The blower unit 9 is of a centrifugal type, and includes a blower 18 housed in a scroll-shaped blower case 17 and sucks air through a bell mouth 19 formed on the upper surface of the blower case 17. The inhaled air circulates around the inside of the blower case 17 in a scroll shape, and is blown toward an air conditioner unit 21 connected to a discharge port 20 protruding from the passage forming case 8.
[0022]
The air blown to the air conditioner unit 21 is cooled or heated by an evaporator or a heater core (not shown), and the temperature is adjusted by a mix door (not shown). Blow out to.
[0023]
In the vehicle air conditioner configured as described above, since the inside air filter 10A is attached to the bottom surface of the passage forming case 8 surrounding the blower unit 9, the suction area can be made larger than in the related art. In the present embodiment, the filter 10A is located at a position where the undercover should exist.
[0024]
In the present embodiment, the depth of the filter is increased by 100 mm (about 1.5 times) and the width is increased by 280 mm (about 2.3 times) as compared with the structure shown in FIG. Thereby, the ventilation resistance is reduced to about 1/5 to 1/6. Further, since the passage forming case 8 surrounds the blower unit 9, it also functions as a sound insulation case. Therefore, the noise is significantly reduced.
[0025]
Further, the outside air filter 10B may be provided in the passage forming case 8, as shown in FIG.
[0026]
The passage forming case 8 may be formed integrally with the blower case 17. For example, as shown in FIGS. 4 and 5, the passage forming case 8 is formed by combining an upper case 22, a lower case 23, and an intermediate case 24 interposed therebetween. A first blower case forming portion 25 forming the lower half of the case 17 is integrally formed, and a second blower case forming portion 26 forming the upper half of the blower case 17 is formed integrally with the intermediate case 24. When the cases 23 to 25 are combined, the blower case 17 is formed.
[0027]
With such a configuration, the total die cost is reduced, and the positioning and fixing of the blower unit 9 to the passage forming case 8 become unnecessary, so that the assembly is facilitated and the productivity is improved. Yes.
[0028]
Similar effects can be obtained when the passage forming case 8 is formed integrally with the instrument panel 3 or the glove box 4 or both.
[0029]
In addition, various modifications can be made to the above embodiment without departing from the spirit of the present invention.
[Brief description of the drawings]
FIG. 1 is a sectional view of a main part according to an embodiment of the present invention.
FIG. 2 is a view taken along line AA of FIG. 1;
FIG. 3 is a sectional view of a main part of another embodiment of the present invention.
FIG. 4 is an exploded sectional view of a main part according to another embodiment of the present invention.
FIG. 5 is an exploded perspective view of a main part of another embodiment of the present invention.
FIG. 6 is a cross-sectional view of a main part of a conventional technique.
[Explanation of symbols]
7 blower passage 8 passage formation case 9 blower unit 10A inside air filter 10B outside air filter 14 inside air inlet 15 outside air inlet

Claims (4)

An air passage (7), an outside air inlet (15) connected to the air passage (7), an inside air inlet (14) connected to the air passage (7), and an outside air provided in the air passage (7). A blower unit (9) for sucking inside and outside air through the inlet (15) and the inside air inlet (14), and a filter () for purifying air sucked into the air passage (7) by the blower unit (9). 10) a vehicle air conditioner comprising:
A passage forming case (8) surrounding the blower unit (9) to form a ventilation passage (7), a bottom surface of which is located below the blower unit (9) and opened to form an inside air inlet (14). Wherein the filter (10) comprises an inside air filter (10A) and an outside air filter (10B), and the inside air filter (10A) is attached to the bottom surface of the passage forming case (8). Air conditioner. The vehicle air conditioner according to claim 1, wherein the passage forming case (8) is formed integrally with the blower case (17). The vehicle air conditioner according to claim 1 or 2, wherein the passage forming case (8) is formed integrally with the instrument panel (3) and / or the glove box (4). The vehicle air conditioner according to claim 1 or 2, wherein a sound absorbing material (11) is provided in the passage forming case (8).

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