JPH03266716A - Air cleaner for automobile - Google Patents

Abstract

PURPOSE:To eliminate the resonance of a lid by providing a rib on the side of the lid or of a main body, and by providing a cushion at a certain interval between the front end and the counter part of the rib, so as to abut the lid side on the main body side through the cushion when required. CONSTITUTION:When an air stream flows in from an inlet port 18 into a main body 11, fine dust in the air is charged by a discharging device 19, and is absorbed by an electrostatic charged filter of a filter 20. The clean air than has passed through the filter 20 flows from a suction port 17 as well as a vent hole 17' into a vortex chamber 27, and is discharged from an air outlet 28 to the outside by a fan 12. A flat lid 29 is resonated, in particular, due to the vibration caused by driving. A cushion 30 is supported on the front end by a support rib 26 of the filter 20 in such a way that it is protruded to the side of the lid 29, while a gap is formed between them. Since the lid 29 is abutted on the cushion 30 when the resonance starts, the resonance is eliminated by changing the resonance frequency of the lid.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to the structure of an on-vehicle air cleaner mounted on the rear tray of an automobile.

2. Description of the Related Art In recent years, the number of on-vehicle air cleaners that purify cigarette smoke and odors in automobiles has increased, and it has become common for them to be installed in the rear tray.

A conventional vehicle-mounted air cleaner mounted on a rear tray of this type will be described with reference to FIGS. 3 and 4.

As shown in the figure, a motor 4 with a vertical axis is inserted over almost the entire circumference of the outer flange 4' inside the main body, which is formed into a box by the lower main body 1, the upper main body 2, and the lid 3. The buffer member 5 is held between the protruding ribs la and lb of the lower body 1, and is held between the ribs 7a of the partition wall 7 fixed to the lower body 1 with screws 6. A suction port 2b is provided on the upper surface 2a of the upper body 2.
is opened, and a thin chamber wall 2c is hung downward from the other side to form a thin chamber 8 with the partition wall 7, in which a fan 9 fixed to the motor 4 is housed. Electrical components (not shown) and the like are disposed in a space 10 below the inclined portion 2d extending to the upper surface portion 2a. The upper surface portion 2a.

Ribs 2e and 2f are provided upright on the oblique portion 2d, and a filter 112 is placed thereon via a wire mesh 111. In communication with the swirl chamber 8, an upper body 2 is provided upstream and downstream thereof, respectively. The lower body 1 has many intake holes 2g, lc.

6113 with exhaust holes 2h and ld open is a high voltage power supply (
It is supplied with power from (not shown) and causes corona discharge.
14 and a counter electrode 115, a prefilter 116 is provided on the upstream side.

In the above configuration, when the motor 4 is driven, the intake hole 2g
, relatively coarse dust is removed from the interior air sucked from the IC by a pre-filter 116 installed upstream of the discharger 113, and positive ions are added to the fine dust as it passes through the discharger 113. The odor particles are electrically adsorbed by a rear filter 112 consisting of a negative polarity collection filter and a deodorizing filter, and the odor particles are adsorbed by the deodorizing filter. The clean air purified in this way passes through the space between the inclined part 2d, the upper surface part 2a, and the filter 112, and enters the thin chamber 8 from the suction port 2b, as shown by the arrow in the figure.
The gas is introduced into the vehicle interior and is returned to the interior of the vehicle through exhaust holes 2h and ld.

Problems to be Solved by the Invention In such a conventional structure, the lower body 1. It has a box body composed of an upper body 2 and a lid 3, and in particular, since the lid 3 is flat, it becomes a resonant box, resulting in high noise during operation.

The present invention solves the above problems, and aims to provide a quiet vehicle air cleaner.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention forms an intake port and an exhaust port on opposite sides of a box-shaped main body, and provides a discharge device inside the main body from the intake port side.

A filter and a fan attached to a motor are arranged almost horizontally, a cushion is interposed between the inner center of the lid and a rib or boss protruding from the main body, and a slight gap is provided between the cushion and the lid. and the lid.

Function The present invention has the above-described structure, and by interposing a cushion between the inner lid and the rib or boss protruding from approximately the center of the main body, and by providing a slight gap between the cushion and the lid, the lid can be closed. When the lid starts to resonate, the lid comes into contact with the rib or boss through the cushion, so the resonant frequency of the lid changes, and the resonant frequency of the lid changes, making it quiet.In other words, by changing the resonant frequency of the lid, the vibration of the lid is reduced. It suppresses the noise and makes it quiet.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 4.

As shown in the figure, a fan 1 is installed inside the air purifier main body 11.
The motor 13 is sandwiched between the partition wall 15 and the main body 11 via a support rubber 14.

The fan 12 is arranged horizontally, a suction port 17 opened in the inner wall 16 of the main body is provided upward, and a ventilation port 17' is provided between the inner wall 16 of the main body and the motor 13.

A discharge device 19 is installed in the intake port 18 provided on the side of the main body.
A filter 20 bent into a V-shape is provided behind the discharge device 19.

The discharge device 19 includes two electrodes 21 having protruding needle-like protrusions installed in parallel, and a grounding body 22 formed in a box shape from sheet metal arranged parallel to the electrodes 21.
is insulated from the ground body by an insulator and fastened with a screw. A control circuit 23 is provided below the filter 20 and controls the motor 13.

A metal shield plate 24 is formed on the control circuit 23 so as to cover the control circuit 23, and the shield plate 24 is formed on the control circuit 23 so as to cover the control circuit 23.
The intake air 018 side of No. 4 is in contact with the lower side of the filter 20.

The filter 20 is formed by pasting together an electrostatically charged filter and an activated carbon filter incorporating activated carbon.In its natural state, it is in the form of a horizontal plate, but a thin part for bending is formed in the center, making it easy to bend. It can be bent into a V shape.

The filter 20 is inserted along a guide frame 25 that projects integrally from a grid attached to the discharge device 19, and its lower side is pressed against the shield plate 24 by the guide frame 25.

The air downstream side of the filter 20 is supported by ribs 26, and the position of the filter 20 is fixed.

A whirlpool chamber 27 surrounding the fan 12 is formed by a partition wall 15, an inner wall 16, and a side wall, and a part thereof is provided with an exhaust air 028.

The support rib 26 of the filter 20 is made to protrude toward the lid 29 side,
The cushion 30 is supported at the tip, and the lid 29 and the cushion 3
0, there is a slight gap with which the cushion 30 contacts when the lid resonates.

In the above configuration, air flows into the main body 11 through the intake port 18, and the fine dust becomes electrically charged by the discharge device 19, and is attracted to the electrostatic charging filter of the filter 20. Odors are also absorbed by activated carbon filters.

The clean air that has passed through the filter 20 enters the swirl chamber 27 through the suction port 17 and the ventilation port 17', and is discharged to the outside through the exhaust port 28 by the fan 12.

The vibrations generated by this operation cause the box body constituted by the main body 11 and M29, especially the flat lid 29
tries to generate resonance, but when M29 starts to resonate, the cushion 3 supported at the tip of the support rib 26
0+:1m,! The inside of 29 hits. When M29 hits the cushion 30, the resonance frequency of 129 changes and the vibration stops. When trying to start vibration in this way, it will hit, and in order to change the resonance frequency, it is best to provide the hit part near the center of the lid 29, where the amplitude is the largest.

In addition, the protruding rib 26 is installed in the cushion 3 from the 11 cases of the main body.
0 is attached to the rib 26, but the protrusion may be provided at 129 as shown in FIG. 2, and the cushion 30 is attached to the lid 26.
11, similar results can be obtained.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a cushion is provided on the rib provided on the inside of the lid or on the main body side,
There is a slight gap between this cushion and the opposing part, so when the lid is about to start resonating, the lid will hit the ribs or bosses on the body side through the cushion, causing the lid's resonance frequency to increase. It is possible to provide an in-vehicle air purifier that can be made silent without resonance.

[Brief explanation of drawings]

FIG. 1 is a sectional view of an in-vehicle air cleaner according to an embodiment of the present invention, and FIG. 2 is a sectional view of an in-vehicle air cleaner according to an embodiment of the present invention.
FIG. 3 is a sectional view of a conventional vehicle-mounted air cleaner, and FIG. 4 is an exploded perspective view of the vehicle-mounted air cleaner. 11... Body, 12... Fan, 13
...Motor, 18...Intake port, 19.
...Discharge device, 20...Filter, 2
6...Rib, 28...Exhaust port. 29...Lid, 30...Cushion.

Claims (1)

[Claims] The main body and lid form a box, and an intake port and an exhaust port are formed on opposite sides, and inside the box, a discharge device, a filter, and a fan attached to a motor are arranged almost horizontally from the intake port side. , a cushion is provided at approximately the center of the inner side of the lid or a protrusion such as a rib or boss provided on the main body, and the cushion contacts between the cushion and the opposing protrusion of the lid or the main body when the lid resonates. An on-vehicle air purifier that forms a small gap.