JPH1086658A - Fitting construction for filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep constant the pressing force to a sealing member between a filter insert port and a cover part blocking the insert port so as to prevent air from leaking by forming ribs along the lengthwise direction of a sealing face with which the sealing member is contact so as to be made gradually higher from both end sides for fixing the cover toward the center part. SOLUTION: An insert port 7 for inserting filters 20 therein is formed on the side of an air conditioning case, and a sealing face 10 is formed on the peripheral edge of the insert hole 7. An upper locking part 8 is formed on the upper end of the sealing face 10, and a lower locking part 9 is formed on the lower end. Further, ribs 11 are formed along the lengthwise direction of the sealing face 10 so as to be made gradually higher from the upper and lower ends toward the center part. Hereby, the force pressing a sealing member can be insured by the ribs 11 even at the center part far from the fixing parts 8, 9, and hence the sealing ability can be kept constant on respective parts. Consequently, sealing performance between the insert port 7 and the cover can be improved so as to prevent air from leaking.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air filter mounting structure in which a filter is inserted from an insertion port formed in an air conditioning case, and the insertion port is closed by a cover.

[0002]

2. Description of the Related Art As a conventional air filter mounting structure, Japanese Utility Model Laid-Open Publication No. Hei 6-78026 discloses a filter which is stacked near the upstream side of an evaporator in a direction perpendicular to the air flow direction. It is disclosed that one filter is fixed by a lever. The evaporator unit has a filter (including one with an air purifier).
In the case of mounting, due to restrictions on layout at the time of assembly work, for example, due to the presence of a steering member (a member that is disposed to penetrate the instrument panel perpendicularly to the traveling direction of the vehicle and supports a steering device such as a steering wheel) It is a common practice to insert the filter into two upper and lower parts from the lateral direction of the evaporator unit (Japanese Patent Application No. 7-97792 filed by the present applicant).

[0003] The present applicant has filed a Japanese Patent Application No. 7-33594.
In No. 7, in order to prevent rattling of the filters arranged above and below with a simple structure, the upper surface of the filter is parallel to the insertion direction of the filter, and is gradually heightened from both ends toward the center. A pair of filter guides, each having an increased height, is formed, and when the filter is mounted, the filter guide bends a central portion of the filter, and the filter tries to hold each other with a restoring force due to the bending.

[0004]

However, the one disclosed in Japanese Utility Model Laid-Open Publication No. Hei 6-78026 has a good filter fixing property and a good sealing property between the filter and the filter insertion opening, but has a problem in that the lever for holding the filter is difficult to operate. There is a problem that the drawing is complicated and the work is difficult due to layout restrictions during the assembly work.

In Japanese Patent Application No. 7-97792, since a filter equipped with an electric air cleaning device is used as a filter, it is necessary to fix it firmly with a cover. Although the one disclosed above, there is a problem that the screwing operation and the replacing operation become complicated.

Further, as shown in FIGS. 4 and 7, in a type in which the filter insertion opening is closed by one cover, upper and lower ends A and C or left and right ends A ',
In the type in which C 'is fixed, the pressing force of the sealing material disposed between the cover and the peripheral edge of the insertion opening is weak at the central portion B or B' of the cover, so that the sealing property at this portion is poor. Therefore, a problem of air leakage occurs.

Furthermore, in Japanese Patent Application No. 7-335947, the upper end of the cover of the upper filter is fixed and the lower cover of the upper filter is fixed in the cover portion for closing the insertion opening of the filter stacked vertically. The lower end of the cover part of the filter is fixed. For this reason, for example, as shown in FIG. 10, the fixed sides (upper ends A ″ and lower ends C ″) of the covers of the two filters are provided with a sufficient amount of sealing material disposed between the sealing surface around the insertion opening and the cover. However, there is a problem that the pressing force of the sealing material is weakened at the central side B ″ where the filter covers come into contact with each other, so that the sealing performance at this portion is reduced and air leakage occurs.

Therefore, in the present invention, air leakage is prevented by keeping the pressing force of a sealing member disposed between an insertion port for inserting a filter and a cover portion closing the insertion port constant. It is an object of the present invention to provide an air filter mounting structure that can be used.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a filter for an air conditioner, wherein a filter is inserted from an insertion port formed in the air conditioner case, the filter is held in an air passage in the air conditioner case, and a cover having a seal member is provided. In the filter mounting structure for closing the insertion port, the sealing surface formed on the peripheral edge of the insertion port has the cover fixing means at both ends in the longitudinal direction, and has two longitudinal sides along the longitudinal direction. It has a rib that is low at both ends in the direction and gradually rises from the both ends toward the center (claim 1).

Thus, according to the present invention, both ends for fixing the cover are low along the longitudinal direction of the seal surface with which the seal member mounted on the cover for closing the insertion opening of the filter comes into contact. By forming the ribs that become gradually higher, even in the central portion far from the fixed portion, the force that the rib presses the sealing member can be secured, so that the sealing ability at each portion can be made constant,
The above object can be achieved.

Further, the present invention can be applied to a case where the insertion opening is opened on a side surface of the air conditioning case (Claim 2) and a case where the insertion opening is opened on a lower surface of the air conditioning case (Claim 3). Things. Further, the filter may be formed of at least two parts (claim 4). In this case, in particular, the cover is integrally formed with each of the at least two parts constituting the filter, and Is preferably closed by the at least two covers (claim 5).

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

An air-conditioning case 1 shown in FIG. 1 is disposed between a blower unit (not shown) and a heater unit, and has a blower unit side opening 2 connected to the blower unit, and a heater unit connected to the heater unit. And an air passage 4 communicating between the blower unit-side opening 2 and the heater unit-side opening 3 connected to the heater unit. .
An evaporator 5 as a heat exchanger for cooling is arranged on the air flow path 4, and a drain port 6 for disposing drain water of the evaporator 5 is formed downstream of the evaporator 5.

As shown in FIG. 2, an insertion port 7 for inserting a filter 20 described below is formed on the side of the air conditioning case 1 on the upstream side of the evaporator 5. Is formed with a sealing surface 10. An upper locking portion 8 is formed at the upper end of the sealing surface 10 and a lower locking portion 9 is formed at the lower end. Further, the ribs 11, 11 according to the present invention are provided on the sealing surface 10.
Are formed along the longitudinal direction. This rib 11
It is formed so as to gradually increase from the upper end and the lower end toward the central portion. In this embodiment, particularly, the lower end portion is formed so as to increase again.

In the present invention, the sealing surface 1
The reason why the rib 11 having a narrow width is set up instead of inclining the entirety of the seal member 27 is that if the entire sealing surface 10 is inclined, the filter 20 is unnecessarily lifted up. This is because the surface pressure between the rib 11 and the rib 11 needs to be reduced.

In the embodiment shown in FIGS. 2 to 4, the cover 50 is formed separately from the filter 20, and the insertion opening 7 is closed by a single plate.
A seal member 53 is attached to the inside of the cover 50 over the entire surface or only at the periphery. An upper locking piece 51 protrudes from the upper end of the cover 50, and a lower locking piece 52 is formed from the lower end. As a result, the filter 20 is inserted into the insertion port 7 and stacked vertically, and thereafter, as shown in FIG. 3, the upper locking piece 51 at the upper end of the cover 50 is inserted into the upper locking portion 8. The lower locking piece 52 is inserted into the lower locking portion 9 by rotating the cover 50 with the fulcrum as a fulcrum, and is fixed by the clip 54 to complete the mounting of the filter 20.

In the case of the cover 50, since the upper and lower ends A and C of the cover 50 are fixed, the seal member 53 is pressed with a predetermined pressure to ensure the sealing property. Has a problem that the sealing force is reduced due to a decrease in the pressing force by the cover 50. However, since the rib 11 is set up, the locking portions A and
Since the pressing force of the seal member 53 at C and the pressing force of the seal member 53 at the central portion B can be made substantially constant,
Even in the central portion B, a sufficient sealing property can be ensured.

In the embodiment shown in FIGS. 5 to 7, the insertion port 7 'is formed below the air conditioning case 1, and the filter 20 is inserted into the air conditioning case 1 from below. In contrast to the above-described embodiment in which the layers are stacked perpendicularly to the insertion direction, in this embodiment, the layers are stacked in the insertion direction. Also in this embodiment, the cover 50 'is formed separately from the filter 20,
The insertion opening 7 'is closed by a single plate, and a sealing member 53' is attached to the inside of the cover 50 'over the entire surface or only at the periphery. A rear locking piece 51 'is formed at one end of the cover 50' so as to protrude, and a front locking piece 52 'is formed at the other end. As a result, the filter 20 is inserted into the insertion opening 7 ′ and stacked vertically, and thereafter, as shown in FIG. 6, the back side locking piece 51 ′ at one end of the cover 50 ′ is connected to the back side locking portion 8. And the cover 50 ′ is rotated about the fulcrum to insert the front locking piece 52 ′ into the front locking portion 9 ′ and fixed with the clip 54 ′ to complete the mounting of the filter 20. Is what you do.

In the case of the cover 50 ', since the back side and the front side A' and C 'of the cover 50' are fixed, the seal member 53 'is pressed with a predetermined pressure to secure the sealing performance. The central part B ′ is covered with a cover 5.
There was a problem that the sealing performance was deteriorated due to a decrease in the pressing force due to 0 ′, but since the above-described ribs 11 were erected, the sealing members 53 ′ at the locking portions A ′ and C ′.
And the pressing force of the sealing member 53 'at the central portion B' can be made substantially constant, so that sufficient sealing performance can be ensured even at the central portion B '.

In the above embodiment, the filter 20 is constituted by the frame 22 and the filtering section 23, but may be provided with an electric air purifying device.

In the embodiment shown in FIGS. 8 to 11, an upper locking portion 8 "is formed at the upper end of the sealing surface 10" and a lower locking portion 9 "is formed at the lower end. Furthermore, ribs 11, 11 according to the present invention are formed on the sealing surface 10 "in the longitudinal direction of the sealing surface 10". The ribs 11 are gradually raised from the upper end and the lower end toward the central portion. In this embodiment, particularly, the lower end portion is formed so as to be higher again.

The filter 2 inserted into the insertion port 7 "
0 ′ is a frame 22 ′ and a filtering unit 23 ′ made of, for example, a nonwoven fabric or a mesh disposed in the frame 22 ′.
And a mounting guide 2 formed on an upper portion of the frame 22 '.
1, a lower guide 29 shown in FIG.
And a cover 24 having a lower locking piece 26 at the outer upper and lower ends and a seal member 27 disposed on the inner peripheral edge. The filtering section 23 'may be one that electrically collects dust. In this embodiment, the cover 24 is formed integrally with the filter 20 ′, and the insertion opening 7 ″ is closed by the covers 24 of a plurality of filters 20 ′ to be stacked. .

As shown in FIG. 9, first, the upper locking piece 25 is inserted into the upper locking portion 8 ", and the filter 20 'is turned about the fulcrum as shown in FIG. 20 ′, and this filter 2
Another filter 20 ′ is inserted below 0 ′, and the lower locking piece 26 and the lower locking portion 9 ″ are fixed between the lower locking piece 26 and the lower locking portion 9 ″ by the clip 30. Make up.

In this case, as shown in FIG. 10, in a filter in which two filters 20 'are vertically stacked, the upper filter 20' is the upper end A "of the cover 24.
Is fixed, and the lower filter 20 ′ has the lower end C ″ of the cover 24 fixed.
The portion B ″ where the 0 ′ abuts is in a free state. For this reason, in the related art, although the sealing property can be secured by a sufficient pressing force on the locking side of the seal member 27,
Since the sealing member 27 cannot be sufficiently pressed in the central portion B ", the sealing performance at this portion is reduced. As described above, the sealing surface formed on the peripheral edge of the insertion port 7" By forming the ribs 11 and 11 so as to be lower at both ends at 10 "and gradually higher toward the central portion, the pressing force of the sealing member at the central portion B can be secured, so that the sealing performance of this portion is improved. That can be done.

The reason why the rib 11 having a narrow width is set up instead of inclining the entire sealing surface 10 "is that, when the entire sealing surface 10" is inclined, the filter 20 'is more than necessary. Is raised,
This is because the surface pressure between the seal member 27 and the rib 11 needs to be reduced.

Further, as shown in FIG. 11 (a), the lower end of the cover 24 of the filter 20 'located on the lower side is easily wound around the end of the seal member 27 to form a gap 40, from which air is generated. Leakage may occur. Therefore, as shown in FIG. 11B, a lower end rib 41 is formed so that the lower end of the rib 11 is raised again, and the gap 40 is filled with the lower end rib 41. Thus, air leakage from the gap 40 can be prevented.

[0027]

As described above, according to the present invention, the filter is provided along the longitudinal direction of the sealing surface which is the contact surface between the peripheral portion of the filter insertion port and the cover closing the insertion port. The ribs are formed so as to be lower at both ends in the longitudinal direction, which is the stop portion, and to be higher as the distance from the locking side increases, so that the pressing force of the seal member at the central portion can be secured. The sealing performance between the insertion opening and the cover can be improved with a simple structure to prevent air leakage.

[Brief description of the drawings]

FIG. 1 is a side view showing an air conditioning case according to the present invention.

FIG. 2 is an explanatory view showing the vicinity of an insertion port formed on a side surface of an air conditioning case, a filter inserted therein, and a filter and a cover that are separate from the filter that closes the insertion port.

FIG. 3 is an explanatory view showing a mounting state of the cover shown in FIG. 2;

FIG. 4 is an explanatory view of the vicinity of an insertion port to which the cover shown in FIG. 2 is attached.

FIG. 5 is an explanatory view showing the vicinity of an insertion port formed on the lower surface of the air conditioning case, a filter inserted therein, and a filter and a cover which are separate from the filter for closing the insertion port.

FIG. 6 is an explanatory diagram showing a mounting state of the cover shown in FIG. 5;

FIG. 7 is an explanatory view showing the vicinity of an insertion port to which the cover shown in FIG. 5 is attached.

FIG. 8 is an explanatory view showing the vicinity of an insertion port formed in an air conditioning case, a filter inserted therein, and a cover integrated with a filter for closing the insertion port.

FIG. 9 is an explanatory diagram showing a mounting example of a filter.

FIG. 10 is an explanatory diagram near an insertion port where a filter is mounted.

11A is a conventional view illustrating a state of a lower end of a cover of a filter mounted on a lower side, and FIG. 11B is a view illustrating a state of a lower end of a cover of the filter according to the embodiment of the present application. It is.

[Explanation of symbols]

 Reference Signs List 1 air conditioning case 4 air passage 7, 7 ', 7 "insertion port 10, 10', 10" sealing surface 11 rib 20, 20 'filter 24 cover 27 sealing member 50, 50' cover 53, 53 ', 53 "sealing member

Claims (5)

[Claims] 1. A filter mounting structure in which a filter is inserted from an insertion opening formed in an air conditioning case, the filter is held in an air passage in the air conditioning case, and the insertion opening is closed by a cover having a seal member. The sealing surface formed on the peripheral edge of the insertion port has fixing means for the cover at both ends in the longitudinal direction thereof, and two sides along the longitudinal direction have lower both ends in the longitudinal direction. A filter mounting structure characterized by having a rib gradually rising toward the center side. 2. The filter mounting structure according to claim 1, wherein said insertion opening is opened on a side surface of said air conditioning case. 3. The filter mounting structure according to claim 1, wherein the insertion opening is opened on a lower surface of the air conditioning case. 4. The filter mounting structure according to claim 1, wherein the filter is formed by laminating at least two components. 5. The filter according to claim 4, wherein the cover is formed integrally with each of at least two parts constituting the filter, and the insertion port is closed by the at least two covers. Mounting structure.