JPH10264649A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct air quantity distribution in an air duct into the desired direction by constituting the filter out of at least over two sorts of filter materials in the plane direction. SOLUTION: The filter 8 of this filter device 2 is constituted of filter materials 10, 11 of different mesh size in the plane direction. When this filter device 2 is installed in an air conditioner, the filter material 10 of fine mesh is let correspond to a part of large quantity of air. By installing the filter device 2 in this way, a large quantity of air is apt to pass through the filter material 10 part. However, the mesh of the filter material 10 is fine, air hardly flows through the part compared with the filter material 11 part, and hence a part of air passing through the filter material 10 part makes a detour to the filter material 11 part. Hereby, air passes through the whole filter 8 in good balance, and on the outlet side of the filter device 2, the air quantity distribution in the plane direction of the filter 8 is corrected and uniformalized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device installed in, for example, an air passage of an air conditioner for removing dust and the like from air passing through the air passage.

[0002]

2. Description of the Related Art Conventionally, a filter device installed in, for example, an air passage of a vehicle air conditioner for capturing and removing dust and the like from air passing through the air passage and filtering the air is well known. ing. This filter device is usually installed on the upstream side of the ventilation path and on the downstream side (for example, on the evaporator side).
Dust and the like are removed from the air flowing to the air.
Also, since the filter that actually captures the dust is made of a single filtering material (for example, a nonwoven fabric),
The roughness of the eyes in the surface direction of the filter and the ventilation resistance for the same air flow per unit area are also uniform.

[0003]

However, the air flow in the direction of the surface of the filter in the air passage, that is, in the cross direction of the air passage, is not always uniform, and there is usually a more or less air flow distribution (for example, an air passage). The air volume at the center of the flow path in the cross-sectional direction increases.) For this reason, an airflow distribution also exists in the air passing through the filter and flowing downstream, and in an air conditioner in which an evaporator is arranged downstream of the filter, the airflow having a uniform airflow distribution over the entire evaporator is obtained. Cannot be supplied, and a temperature distribution may occur in the evaporator. When a temperature distribution occurs in the evaporator, there is a possibility that the heat exchange performance is reduced or frost is formed.

[0004] Also, clogging of the filter is usually affected by the accumulated air volume passing therethrough, so that a portion having a large amount of air flow is clogged at an early stage, and a certain portion exceeds the limit, resulting in a filter as a whole. Also, the period of replacement, cleaning, etc. is shortened. If the clogged filter is left unattended and used continuously, a sufficient air volume cannot be supplied to the evaporator or the like, which may lower the cooling capacity or adversely affect other devices of the air conditioner.

SUMMARY OF THE INVENTION It is an object of the present invention to easily correct the air volume distribution in an air passage in a desired direction, to have excellent durability, and to ensure efficient operation of the air conditioner when applied to the air conditioner. It is an object of the present invention to provide a filter device capable of performing the above.

[0006]

In order to solve the above-mentioned problems, a filter device according to the present invention is characterized in that, in a filter device installed in an air passage, at least two or more types of filters of the filter device are arranged in the plane direction. Characterized by comprising a filtration material of

[0007] The two or more types of filtration materials may be materials having different meshes from each other. Further, the two or more types of filtration materials may be materials having different airflow resistances at the same air volume per unit area.

[0008] Of the two or more types of filtering materials, it is desirable that the fine material or the material having high ventilation resistance is arranged corresponding to a portion having a large air volume in the air passage.

[0009] It is desirable that the two or more kinds of filtration materials are detachable from each other.

The filter device according to the present invention is most suitable as a filter device for an air conditioner, especially as a filter device for a vehicle air conditioner. However, the present invention is not limited to this, and can be widely applied to other industrial fields.

In the above-described filter device, the filter is composed of at least two or more types of filtration materials in the surface direction, and the two or more types of filtration materials are different from each other in the material of the mesh or the ventilation. Materials with different resistances can be used. Therefore, by setting the arrangement positions of the two or more types of filtration materials, the flow rate of air passing through the filter in the surface direction, that is, in the direction traversing the air path, can be freely adjusted. Thus, a desired air volume distribution can be formed.

In addition, if a fine material or a material having a high airflow resistance among the two or more kinds of filtering materials is disposed in correspondence with a portion having a large air volume in the air passage, the portion is difficult to pass air. Therefore, some of the air is diverted to the other part side (the side of the coarse filter material or the side of the filter material having low ventilation resistance). For this reason, air passes through the entire filter in a well-balanced manner, and at the outlet side of the filter device, the air volume distribution in the surface direction of the filter is corrected, and the air volume distribution can be made uniform. Therefore, it is possible to supply air having a uniform air volume distribution to the entire evaporator arranged downstream of the filter, and thus it is possible to prevent or suppress the occurrence of temperature distribution in the evaporator itself, to improve heat exchange efficiency, Prevention of frost and the like can be achieved.

Further, as described above, two or more kinds of filtering materials are arranged to correct the air volume distribution. As a result, the entire filter is used in a well-balanced manner. The lifespan is extended. Therefore, it is possible to stably supply a desired amount of air to the downstream side for a long period of time. Further, the replacement and cleaning time of the filter itself can be greatly extended.

Further, if two or more kinds of filter materials are assembled together and made detachable, for example, only filter materials which are easily clogged can be replaced and cleaned, so that the amount of filter consumption can be reduced and the filter device can be reduced. Maintenance and inspection work can be made more efficient.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a filter device according to the present invention will be described below with reference to the drawings. FIG.
1 shows an air conditioner having a filter device according to a first embodiment of the present invention, and the air conditioner comprises a vehicle air conditioner. In FIG. 1, reference numeral 1 denotes a vehicle air conditioner. The air conditioner 1 has a filter device 2 and an evaporator 3. Air conditioner 2 and evaporator 3
Is installed in an air passage 5 formed by a duct or case (unit) 4, and is arranged in the order of the filter device 2 on the upstream side in the air passage direction indicated by the arrow and the evaporator 3 on the downstream side.

An inlet air passage 6 is connected to an air passage 5 formed by the duct or case (unit) 4, and the inlet air passage 6 is formed by an inlet duct 7. Further, the center of the inlet air passage 6 and the centers of the air passage 5 and the filter device 2 are eccentric. For this reason, the passing air is located at the inlet side of the filter device 2, that is, on the inlet side of the air passage 5, at a position corresponding to the center of the inlet air passage 6, where the large air volume 12
Has a distribution of air flow.

The filter device 2 according to the first embodiment of the present invention has a filter 8 and an outer frame 9 supporting the filter 8. The filter 8 is composed of two types of filtering materials 10 and 11 in the surface direction. In this embodiment, the filtering material 11 has a coarser mesh than the filtering material 10. And the filter device 2 is the air conditioner 1
When installed in the wind path 5 of the
0 is arranged so as to correspond to the portion 12 having a large air volume. The filtration materials 10 and 11 are assembled together,
It is configured to be removable.

In this embodiment, the filter 8 of the filter device is composed of filter materials 10 and 11 having different roughnesses in the plane direction.
Is installed in the air conditioner 1, the fine filtering material 10 corresponds to the portion 12 having a large air volume. For this reason, a large amount of air tends to pass through the filter material 10 portion, but since the mesh of the filter material 10 is finely formed, air is less likely to flow than the filter material 11 portion. Therefore, a part of the air that is going to pass through the filter material 10 part bypasses the filter material 11 side part, and the air passes through the entire filter 8 in a well-balanced manner.
On the outlet side of the filter device 2, the air volume distribution in the surface direction of the filter 8 is corrected and made uniform.

Therefore, it is possible to supply the air having the uniform air volume distribution to the entire evaporator 3 disposed downstream of the filter device 2, so that the temperature distribution can be prevented from being generated in the evaporator 3, and the heat exchange can be prevented. Efficiency is improved and frost formation can be reliably prevented.

Further, by allowing air to pass through the entire filter 8 in a well-balanced manner, that is, by equalizing the integrated airflow in each part, the fine filter material 1
A situation in which only 0 is clogged at an early stage is avoided, so that the period until the entire filter 8 is clogged is greatly extended, and the replacement and cleaning cycle of the filter 8 can be extended.

The filtering materials 10 and 11 can be assembled and detached from each other.
Since only one can be easily replaced and cleaned, maintenance and inspection work can be performed efficiently, for example,
If the coarse filter material 11 is a wire mesh, only the filter material 10 is periodically replaced, and the filter material 11 can be continuously used only by cleaning.

In the above embodiment, the filtering materials 10 and 11 are made of materials having different mesh sizes, but the filtering materials 10 and 11 may be made of materials having different ventilation resistances. . For example, eye roughness (mesh)
May be the same, but two types of filters may be used in which the eye shapes are different from each other (for example, a randomly shaped eye and a regularly shaped eye), so that the ventilation resistance is different.

The filtering material constituting the filter 8 is 2
At least three types may be used, and three or more types may be used.

[0024]

As described above, when the filter device of the present invention is used, the air volume distribution in the air passage can be easily corrected in a desired direction, the service life and durability are excellent, and when the filter device is applied to an air conditioner. Thus, efficient operation of the air conditioner can be ensured.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an air conditioner having a filter device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the filter device according to the first embodiment of the present invention.

[Description of Signs] 1 Vehicle air conditioner 2 Filter device 3 Evaporator 4 Duct or case (unit) 5 Air path 6 Inlet air path 7 Inlet duct 8 Filter 9 Outer frame 10 Fine filter material 11 Coarse filter material 12 High air volume

Claims (6)

[Claims] 1. A filter device installed in an air passage, wherein a filter of the filter device is formed of at least two or more kinds of filtering materials in a surface direction thereof. 2. The filter device according to claim 1, wherein the two or more kinds of filtration raw materials are made of materials having different meshes from each other. 3. The filter device according to claim 1, wherein the two or more kinds of filtration materials are made of materials having different airflow resistances at the same air volume per unit area. 4. A fine-grained material or a material having a large air resistance among the two or more kinds of filtration materials is arranged corresponding to a portion having a large air volume in an air path.
Or the filter device of 3. 5. The filter device according to claim 1, wherein the two or more types of filtration materials are assembled to each other and are detachable. 6. The filter device according to claim 1, wherein the filter device is a filter device for an air conditioner.