WO2018193748A1

WO2018193748A1 - Air-conditioning case

Info

Publication number: WO2018193748A1
Application number: PCT/JP2018/009057
Authority: WO
Inventors: 安恵米津; 歩美川崎; 馬場　公一郎; 俊大森
Original assignee: 株式会社デンソー
Priority date: 2017-04-17
Filing date: 2018-03-08
Publication date: 2018-10-25

Abstract

The purpose of the present disclosure is to provide an air-conditioning case so as to prevent squeaks without impairing seal integrity. A concave section (12) disposed on an end of a first housing (11) has: an inner wall part (14) positioned toward an air passage (30); an outer wall part (13) positioned outside the case; and a bottom part (15) connecting the inner wall part (14) with the outer wall part (13). A convex section (22) disposed on an end of a second housing (21) has a tapered part (23), the thickness of which in a cross-sectional view diminishes progressively from the second housing (21) toward the bottom part (15) of the concave section (12). The tapered part (23) fits between the inner wall part (14) and outer wall part (13) of the concave section (12). A taper angle (θ2) is formed by a face (23a) of the tapered part (23) facing toward the outer wall part (13) and a face (23b) of the tapered part (23) facing toward the inner wall part (14). The taper angle (θ2) is greater than an interior angle (θ1) formed by a face (12a) of the outer wall part (13) facing toward the inner wall part (14) and a face (12b) of the inner wall part (14) facing toward the outer wall part (13).

Description

Air conditioning case

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2017-81471 filed on April 17, 2017 and Japanese Patent Application No. 2018-17277 filed on February 2, 2018. The description is incorporated by reference.

The present disclosure relates to an air conditioning case that constitutes a casing of an air conditioner.

Conventionally, regarding an air conditioning case that constitutes a casing of an air conditioner, a configuration in which a plurality of divided cases are combined is known.

The air conditioning case described in Patent Document 1 includes a female portion (hereinafter referred to as a recess) provided in a concave shape at the end portion of the first case and a convex shape at the end portion of the second case among the plurality of divided cases. And a male part (hereinafter referred to as a convex part). In this air conditioning case, the connection portion between the first case and the second case is sealed by a contact surface between the concave portion and the convex portion, or is sealed by a labyrinth structure formed by the concave portion and the convex portion.

Japanese Patent Application Laid-Open No. 2013-084551

In recent years, in order to easily assemble the divided cases, a structure in which the divided cases are fixed with a one-touch clip without using a fastening member such as a screw has been adopted. In this case, relative movement is more likely to occur between the first case and the second case due to vibration transmitted from the vehicle, and pressure applied to the contact surface between the concave portion and the convex portion due to variation in the shape of the case, deformation of the case, or the like. When it becomes large, a squeak noise may be generated from the contact surface. As a measure for suppressing this squeak noise, a method of widening the gap between the concave portion and the convex portion can be considered. However, if such a measure is taken, there is a concern that the sealing performance of the connection portion between the first case and the second case is lowered.

This disclosure is intended to provide an air conditioning case capable of suppressing the generation of squeaking noise without impairing the sealing performance.

According to one aspect of the present disclosure, the air-conditioning case that forms the housing of the air-conditioning apparatus is
A first case body that forms a ventilation path through which air flows inside the housing;
A second case body that forms an air passage inside the housing together with the first case body;
Of the first case body, provided at the end of the second case body side, an inner wall part located on the ventilation path side, an outer wall part located outside the housing, and an inner wall part and an outer wall part on the first case body side A recess having a bottom to connect the
Provided at the end of the second case body on the first case body side, and has a taper portion whose thickness in a sectional view gradually decreases from the second case body toward the bottom, and the inner wall portion and the outer wall portion of the recess, And a convex portion that fits between
The taper angle formed by the surface of the taper portion on the outer wall portion side and the surface of the taper portion on the inner wall portion side is larger than the inner angle formed by the surface of the outer wall portion on the inner wall portion side and the surface of the inner wall portion on the outer wall portion side. large.

According to this, by making the taper angle of the taper portion of the convex portion larger than the internal angle of the concave portion, the contact surface between the convex portion and the concave portion (hereinafter, the contact surface between the convex portion and the concave portion is simply referred to as “contact surface”). May be far from the bottom. Therefore, in the state where the convex part and the concave part are fitted, the bottom side serves as a fulcrum, and the contact surface serves as the action point, so the reaction force acting on the contact surface from the inner wall part and the outer wall part of the concave part is reduced, and the contact surface Therefore, the frictional resistance (that is, the friction force) generated on the contact surface is reduced. Therefore, this air conditioning case can suppress the generation of squeak noise from the contact surface.

In addition, by making the taper angle of the taper part of the convex part larger than the internal angle of the concave part, even when the convex part and the concave part are displaced in the press-fitting direction, the convexity is caused by the elastic force of the inner wall part and outer wall part of the concave part. It is prevented that a gap is formed between the portion and the recess. Therefore, this air-conditioning case can improve the sealing performance in the contact surface of a convex part and a recessed part.

Further, when the convex portion is press-fitted into the concave portion, the reaction force acting on the contact surface from the inner wall portion and the outer wall portion of the concave portion is reduced, so that the load necessary for press-fitting the concave portion and the convex portion is reduced. Therefore, this air conditioning case can improve the assemblability of the first case and the second case.

In addition, the internal angle of the recessed part mentioned above is an angle including 0 degree. That is, the configuration according to one aspect of the present disclosure includes a configuration in which the surface of the inner wall portion on the outer wall portion side and the surface of the outer wall portion on the inner wall portion side are formed in parallel.

Moreover, according to another viewpoint, the air-conditioning case which comprises the housing | casing of an air conditioner is
A first case body that forms a ventilation path through which air flows inside the housing;
A second case body that forms an air passage inside the housing together with the first case body;
Of the first case body, provided at the end of the second case body side, an inner wall part located on the ventilation path side, an outer wall part located outside the housing, and an inner wall part and an outer wall part on the first case body side A recess having a bottom to connect the
Provided at the end of the second case body on the first case body side, and includes a convex part that fits between the inner wall part and the outer wall part of the concave part,
The surface roughness of at least one of the surface on the convex portion side of the outer wall portion of the concave portion or the surface on the outer wall portion side of the convex portion is larger than the surface roughness of the first case main body or the second case main body,
The surface roughness of at least one of the surface on the convex portion side of the inner wall portion of the concave portion or the surface on the inner wall portion side of the convex portion is larger than the surface roughness of the first case main body or the second case main body.

According to this, since the friction coefficient of the contact surface between the concave portion and the convex portion becomes small, it is possible to reduce the frictional resistance generated on the contact surface. Therefore, this air conditioning case can suppress the generation of squeak noise from the contact surface.

It is an external view of the air conditioning apparatus provided with the air conditioning case which concerns on 1st Embodiment. It is sectional drawing of the II-II line | wire of FIG. FIG. 3 is an exploded view of FIG. 2. It is a schematic diagram for demonstrating the fitting state of the 1st case with which the air-conditioning case which concerns on 1st Embodiment is provided, and a 2nd case. It is a schematic diagram for demonstrating the fitting state of the 1st case and 2nd case with which the air-conditioning case of a 1st comparative example is provided. It is a partial exploded view of the air-conditioning case of 2nd Embodiment. It is a partial sectional view of an air-conditioning case of a 2nd embodiment. It is a partial exploded view of the air-conditioning case of the 2nd comparative example. It is a partial sectional view of an air-conditioning case of the 2nd comparative example. It is a partial exploded view of the air-conditioning case of 3rd Embodiment. It is a partial sectional view of an air-conditioning case of a 3rd embodiment. It is a partial exploded view of the air-conditioning case of 4th Embodiment. It is a partial sectional view of an air-conditioning case of a 4th embodiment. It is a graph which shows the experimental result regarding the relationship between the surface pressure which a squeak noise generate | occur | produces, and surface roughness. It is a partial exploded view of the air-conditioning case of 5th Embodiment. It is a partial exploded view of the air-conditioning case of 6th Embodiment. It is a partial exploded view of the air-conditioning case of 7th Embodiment. It is sectional drawing of a part of 2nd case with which the air-conditioning case of 8th Embodiment is provided. It is an enlarged view of the XIX part of FIG. It is explanatory drawing for demonstrating an example of the manufacturing method of a 2nd case. It is explanatory drawing for demonstrating an example of the manufacturing method of a 2nd case. It is an enlarged view of the XXII part of FIG. It is a partial sectional view of the 1st case with which the air-conditioning case of a 9th embodiment is provided. It is an enlarged view of the XXIV part of FIG. It is explanatory drawing for demonstrating an example of the manufacturing method of a 1st case. It is explanatory drawing for demonstrating an example of the manufacturing method of a 1st case. It is an enlarged view of the XXVII part of FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other will be described with the same reference numerals.

(First embodiment)
A first embodiment will be described with reference to the drawings. The air conditioning case of 1st Embodiment comprises the housing | casing of the air conditioning apparatus mounted in a vehicle. The air conditioner performs air conditioning in the vehicle interior by sucking one or both of the air in the vehicle interior and the air outside the vehicle interior, adjusting the temperature and humidity of the sucked air, and blowing the air into the vehicle interior.

As shown in FIG. 1, the air conditioner 1 of the first embodiment includes a blower unit 2 and an air conditioner unit 3. A blower or the like (not shown) is disposed in the ventilation path formed inside the blower unit 2. Further, an evaporator, a heater core, and the like (not shown) are disposed in the ventilation path formed inside the air conditioner unit 3. The air conditioner 1 adjusts the temperature and humidity of the air by cooling the air taken in the ventilation path from the inside / outside air intake 4 by the evaporator and heating it by the heater core by driving the blower, and has a plurality of outlet openings. It is possible to blow out from the

parts

5 and 6 into the vehicle interior.

The air conditioning case 100 includes a plurality of divided cases provided on the blower unit 2 side and a plurality of divided cases provided on the air conditioner unit 3 side. 1, the blower upper case 101, the blower lower case 102, and the inside / outside air case 103 are illustrated as a plurality of divided cases provided on the blower unit 2 side. Further, as a plurality of divided cases provided on the air conditioner unit 3 side, a unit case left 104, a unit case middle 105, and a unit case right 106 are illustrated.

In FIG. 1, the left and right in the vehicle width direction and the vertical direction are indicated by arrows in a state where the air conditioner is mounted on the vehicle. In FIG. 1, the connection portion 107 between the blower upper case 101 and the inside / outside air case 103 is formed in the vehicle width direction. A connecting portion 108 between the blower upper case 101 and the blower lower case 102 is also formed in the vehicle width direction. A connection portion 109 between the unit case left 104 and the unit case middle 105 is formed in the vertical direction. A connection portion 110 between the unit case right 106 and the unit case middle 105 is also formed in the vertical direction. Although not shown, the connection portions 107 to 110 are also provided on the vehicle front surface, top surface, or left and right surfaces of the air conditioning case 100.

The connection points between the plurality of divided cases are assembled by the one-touch clip 111. Thereby, this air-conditioning case 100 can easily assemble a plurality of divided cases without using a fastening member such as a screw.

The air conditioning case 100 is made of a resin having a certain degree of elasticity and excellent in strength. An example of the resin forming the air conditioning case 100 is polypropylene. The resin forming the air conditioning case 100 is not limited to this, and various resin materials can be used.

2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is an exploded view of FIG. In the following description, one of the plurality of divided cases constituting the air conditioning case 100 is referred to as a first case 10 and the other divided case is referred to as a second case 20. That is, the blower upper case 101 and the blower lower case 102, the blower upper case 101 and the inside / outside air case 103, the unit case left 104 and the unit case 105, and the unit case right 106 and the unit case 105 are the same as the first case 10. This corresponds to an example of the second case 20.

2 and 3, both the first case 10 and the second case 20 continuously extend in the direction perpendicular to the paper surface of FIGS. The first case 10 is one in which a first case body 11 and a recess 12 are integrally formed. The second case 20 is one in which a second case main body 21 and a convex portion 22 are integrally formed. In the state where the first case 10 and the second case 20 are assembled, the first case body 11 and the second case body 21 together form an air passage 30 through which air flows inside the housing.

The recess 12 is provided at the end of the first case body 11 on the second case body 21 side. The concave portion 12 includes an outer wall portion 13 located on the outside air side (that is, the outside of the housing), an inner wall portion 14 located on the ventilation path 30 side, and the outer wall portion 13 and the inner wall portion 14 on the first case body 11 side. It has a bottom 15 for connection. Note that outside air in this specification may refer to air outside the housing. Further, the outer wall portion 13 is provided on the side opposite to the ventilation path 30 with respect to the inner wall portion 14.

The convex portion 22 is provided at the end of the second case body 21 on the first case body 11 side. The convex portion 22 is a portion that fits between the inner wall portion 14 and the outer wall portion 13 of the concave portion 12. The convex portion 22 has a tapered portion 23 extending from the second case main body 21 toward the bottom portion 15 and a tip portion 24 provided on the opposite side of the tapered portion 23 from the second case main body 21. The taper portion 23 is formed so that the plate thickness in a sectional view gradually decreases from the second case main body 21 toward the bottom portion 15. The tip end portion 24 is formed such that the taper angle θ3 in a sectional view is larger than the taper angle θ2 of the taper portion 23. Providing the tip portion 24 on the convex portion 22 makes it possible to easily insert the convex portion 22 into the opening of the concave portion 12.

2 and 3, the inner angle formed by the surface 12a on the inner wall 14 side of the outer wall 13 of the recess 12 and the surface 12b on the outer wall 13 side of the inner wall 14 is indicated by an arrow with reference sign θ1. Show. In the first embodiment, the inner angle θ1 of the recess 12 is 0 ° before the first case 10 and the second case 20 are assembled. That is, before assembling the first case 10 and the second case 20, the surface 12 a on the inner wall portion 14 side of the outer wall portion 13 of the recess 12 and the surface 12 b on the outer wall portion 13 side of the inner wall portion 14 are parallel to each other. Is formed.

2 and 3, the taper angle formed by the surface 23a on the outer wall 13 side of the taper portion 23 and the surface 23b on the inner wall portion 14 side of the taper portion 23 is indicated by an arrow with reference sign θ2. ing. In the first embodiment, the relationship between the internal angle θ1 of the recess 12 and the taper angle θ2 of the taper portion 23 is θ1 <θ2.

Next, the significance of the relationship between the internal angle θ1 of the recess 12 and the taper angle θ2 of the taper portion 23 as θ1 <θ2 will be described.

FIG. 4 is a schematic diagram for explaining a fitting state between the first case 10 and the second case 20, and hatching is omitted for easy viewing of a broken line or the like.

In FIG. 4, a state in which the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are press-fitted is indicated by a solid line. When the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are press-fitted, the contact surface 31 between the concave portion 12 and the convex portion 22 is formed in the range indicated by the arrow A. In FIG. 4, the distance between the contact surface 31 and the bottom 15 of the recess 12 is indicated by an arrow B.

Further, in FIG. 4, a position where the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are directly overlapped is indicated by a broken line. The distance between the position of the concave portion 12 indicated by the broken line and the outer wall of the tapered portion 23 becomes the interference amounts C and D between the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20. When the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are press-fitted, the outer wall portion 13 of the concave portion 12 moves the interference amount C to the outside air along the tapered portion 23, and the inner wall of the concave portion 12. The portion 14 moves along the tapered portion 23 toward the air passage 30 through the interference amount D.

In order to compare with the air conditioning case 100 of the first embodiment described above, an air conditioning case 200 of the first comparative example will be described with reference to FIG. FIG. 5 is also a schematic diagram for explaining a fitting state between the first case 10 and the second case 20 of the first comparative example, and hatching is omitted for easy viewing of a broken line or the like. In the first comparative example, the surface 12a on the inner wall portion 14 side of the outer wall portion 13 of the recess 12 and the surface 12b on the outer wall portion 13 side of the inner wall portion 14 are formed in parallel. Further, the surface 22a on the outer wall 13 side of the convex portion 22 and the surface 22b on the inner wall 14 side are also formed in parallel. That is, in the first comparative example, the inner angle θ4 of the concave portion 12 included in the first case 10 is 0 °, the surface on the outer wall portion 13 side of the convex portion 22 included in the second case 20, and the inner wall portion 14 of the convex portion 22. The angle θ5 formed with the side surface is also 0 °.

Also in FIG. 5, a state in which the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are press-fitted is indicated by a solid line. When the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are press-fitted, the contact surface 31 between the concave portion 12 and the convex portion 22 is formed in the range indicated by the arrow E. In FIG. 5, the distance between the contact surface 31 and the bottom 15 of the recess 12 is indicated by an arrow F.

The distance F between the contact surface 31 and the bottom 15 of the comparative example shown in FIG. 5 is closer than the distance B between the contact surface 31 and the bottom 15 of the first embodiment shown in FIG. Therefore, in the first comparative example, the reaction force acting on the contact surface 31 from the outer wall portion 13 and the inner wall portion 14 of the recess 12 is increased. Therefore, the load necessary for press-fitting the concave portion 12 and the convex portion 22 is larger in the first comparative example than in the first embodiment.

Further, the range E of the contact surface 31 of the first comparative example shown in FIG. 5 is larger than the range A of the contact surface 31 of the first embodiment shown in FIG. Therefore, in the first comparative example, the pressure acting on the contact surface 31 between the convex portion 22 and the concave portion 12 increases, and the frictional resistance generated on the contact surface 31 increases. Accordingly, in the air conditioning case 200 of the first comparative example, relative movement occurs between the first case 10 and the second case 20 due to vibration of the vehicle, and the pressure applied to the contact surface 31 between the concave portion 12 and the convex portion 22 is further increased. When it becomes large, a squeak noise may be generated from the contact surface 31. In addition, as a case where the pressure added to the contact surface 31 of the recessed part 12 and the convex part 22 becomes large, there exists a thing by the dispersion | variation in a case shape, a deformation | transformation of a case, etc.

Also in FIG. 5, the position where the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20 are directly overlapped is indicated by a broken line. The distance between the position of the concave portion 12 indicated by the broken line and the outer wall of the convex portion 22 is the interference amounts G and H between the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20. In order to press-fit the concave portion 12 of the first case 10 and the convex portion 22 of the second case 20, the interference amounts G and H of the comparative example shown in FIG. 5 are the interference amounts of the first embodiment shown in FIG. Smaller than C and D. For example, the interference amounts G and H of the comparative example shown in FIG. 5 are each tens of μm, and the interference amounts C and D of the first embodiment shown in FIG. 4 are each hundreds of μm. However, these numerical values do not limit the scope of rights. The interference amounts C and D of the first embodiment may be several tens μm to several hundreds μm. In the first comparative example, since the interference amounts G and H are small, there is a concern that the sealing performance at the contact surface 31 between the convex portion 22 and the concave portion 12 is lowered when the variation in the shape of the case or the deformation of the case becomes large. .

In contrast to the air conditioning case 200 of the first comparative example described above, the air conditioning case 100 of the first embodiment has the following operational effects. That is, the air conditioning case 100 of the first embodiment is configured such that the taper angle θ2 of the taper portion 23 of the convex portion 22 is larger than the internal angle θ1 of the concave portion 12, so that the contact surface 31 between the convex portion 22 and the concave portion 12 is obtained. Becomes a position far from the bottom 15. Therefore, the reaction force acting on the contact surface 31 from the inner wall portion 14 and the outer wall portion 13 of the recess 12 is reduced, and the surface pressure acting on the contact surface 31 is reduced, so that the frictional resistance (that is, the friction force) generated on the contact surface 31 is reduced. ) Becomes smaller. Therefore, in the air conditioning case 100, when pressure is applied to the contact surface 31 due to variation in the shape of the case, deformation of the case, and the like, and relative movement occurs between the first case 10 and the second case 20 due to vehicle vibration. However, generation | occurrence | production of the squeak noise from the contact surface 31 can be suppressed.

In the air conditioning case 100 of the first embodiment, the taper angle θ2 of the taper portion 23 is larger than the internal angle θ1 of the recess 12. Thereby, even when the convex portion 22 and the concave portion 12 are displaced in the press-fitting direction, a gap can be formed between the convex portion 22 and the concave portion 12 by the elastic force of the inner wall portion 14 and the outer wall portion 13 of the concave portion 12. It is prevented. Therefore, the air conditioning case 100 can improve the sealing performance on the contact surface 31.

Furthermore, since the air-conditioning case 100 of the first embodiment presses the convex portion 22 into the concave portion 12, the reaction force acting on the convex portion 22 from the inner wall portion 14 and the outer wall portion 13 of the concave portion 12 becomes small. A load necessary for press-fitting the convex portion 22 is reduced. Therefore, the air conditioning case 100 can improve the assembling property between the first case 10 and the second case 20.

(Second Embodiment)
A second embodiment will be described. In the second embodiment, the configuration of the concave portion 12 of the first case 10 is changed with respect to the first embodiment, and the other parts are the same as those in the first embodiment. Therefore, the second embodiment is different from the first embodiment. Only will be described.

As shown in FIG. 6, in the second embodiment, the recess 12 has an interval between the surface 12 a of the outer wall 13 on the inner wall 14 side and the surface 12 b of the inner wall 14 on the outer wall 13 side from the bottom 15 side. It is formed in a tapered shape so as to gradually increase toward the second case body 21 side. Therefore, the internal angle θ1 of the recess 12 of the first case 10 is a value larger than 0 °. However, in the second embodiment, as in the first embodiment, the internal angle θ1 of the recess 12 and the taper angle θ2 of the taper portion 23 have a relationship of θ1 <θ2.

As shown in FIG. 7, the contact surface 31 between the concave portion 12 and the convex portion 22 is formed in a range indicated by an arrow I. The range I of the contact surface 31 of the second embodiment shown in FIG. 7 is smaller than the range E of the contact surface 31 of the first comparative example shown in FIG. Further, the distance J between the contact surface 31 and the bottom portion 15 of the second embodiment shown in FIG. 7 is also farther than the distance F between the contact surface 31 and the bottom portion 15 of the first comparative example shown in FIG. Therefore, the second embodiment can achieve the same effects as the first embodiment described above.

Further, in the second embodiment, by making the inner angle θ1 of the recess 12 larger than 0 °, it is possible to widen the opening formed on the side of the recess 12 opposite to the bottom 15. Therefore, the air conditioning case 100 of the second embodiment can improve the assemblability of the first case 10 and the second case 20.

Furthermore, in order to compare with the air conditioning case 100 of the second embodiment described above, an air conditioning case 300 of the second comparative example will be described with reference to FIGS. 8 and 9.

As shown in FIGS. 8 and 9, in the second comparative example, the surface 12 a on the inner wall portion 14 side of the outer wall portion 13 of the recess 12 and the surface 12 b on the outer wall portion 13 side of the inner wall portion 14 are formed in a tapered shape. Has been. However, in the second comparative example, the relationship between the internal angle θ6 of the recess 12 and the taper angle θ7 of the taper portion 23 is θ6 = θ7.

Therefore, as shown in FIG. 9, when the first case 10 and the second case 20 are displaced in the press-fitting direction, a gap 310 is generated between the concave portion 12 and the convex portion 22. Therefore, the air conditioning case 300 of the second comparative example has a problem that the sealing performance at the contact surface between the convex portion 22 and the concave portion 12 is lowered.

On the other hand, in the air conditioning case 100 of the first and second embodiments described above, the relationship between the internal angle θ1 of the recess 12 and the taper angle θ2 of the taper portion 23 is θ1 <θ2. Even when 12 is separated in the press-fitting direction, it is possible to prevent a gap from being formed between the convex portion 22 and the concave portion 12 by the elastic force of the inner wall portion 14 and the outer wall portion 13 of the concave portion 12. Therefore, the air conditioning case 100 of the first and second embodiments can improve the sealing performance at the contact surface 31 between the convex portion 22 and the concave portion 12.

(Third embodiment)
A third embodiment will be described. The third embodiment is obtained by changing a part of the configuration of the convex portion 22 included in the second case 20 with respect to the first embodiment, and is otherwise the same as the first embodiment. Only the parts different from the form will be described.

As shown in FIG. 10 and FIG. 11, in the third embodiment, the convex portion 22 is straight between the taper portion 23 and the second case main body 21 with less change in plate thickness in cross-sectional view than the taper portion 23. Part 25. In the third embodiment, the angle θ8 formed by the surface 25a on the outer wall 13 side of the straight portion 25 and the surface 25b on the inner wall 14 side is 0 °. Therefore, in the straight portion 25, the surface 25a on the outer wall portion 13 side and the surface 25b on the inner wall portion 14 side are formed in parallel.

In the third embodiment, since the straight portion 25 and the concave portion 12 are in contact with each other in the region K shown in FIG. 11, the distance L between the contact surface 31 and the bottom portion 15 can be further increased. Therefore, the reaction force received by the straight portion 25 from the inner wall portion 14 and the outer wall portion 13 of the concave portion 12 is reduced, and the surface pressure acting on the contact surface 31 between the straight portion 25 and the concave portion 12 is reduced. Frictional resistance (ie, frictional force) is reduced. Therefore, the air conditioning case 100 can suppress the generation of squeak noise from the contact surface 31.

(Fourth embodiment)
A fourth embodiment will be described. The fourth embodiment is different from the first embodiment because the configuration of the first case 10 and the second case 20 is changed with respect to the first embodiment, and the other parts are the same as the first embodiment. Only the part will be described.

As shown in FIGS. 12 and 13, in the fourth embodiment, the surface 12 a on the inner wall portion 14 side of the outer wall portion 13 of the recess 12 and the surface 12 b on the outer wall portion 13 side of the inner wall portion 14 are formed in parallel. ing. Further, the surface 22a on the outer wall 13 side of the convex portion 22 and the surface 22b on the inner wall 14 side are also formed in parallel. That is, in 4th Embodiment, the taper part is not formed in the convex part 22. As shown in FIG. In the fourth embodiment, a tapered portion may be formed in the convex portion 22 as in the first and second embodiments described above and a seventh embodiment described later.

In the fourth embodiment, the surface roughness of the surface 22a of the convex portion 22 on the outer wall portion 13 side and the surface 22b of the convex portion 22 on the inner wall portion 14 side is the surface roughness of the first case body 11 or the second case body 21. It is formed larger than this. 12 and 13, the surface roughness formed on the surface 22a of the convex portion 22 on the outer wall portion 13 side and the surface 22b of the convex portion 22 on the inner wall portion 14 side is schematically increased for explanation. It expresses. Specifically, the surface roughness of the surface 22a on the outer wall 13 side of the convex portion 22 and the surface roughness of the surface 22b on the inner wall portion 14 side of the convex portion 22 are, for example, 10 or more average roughness Rz10 or more. . The surface roughness may be increased according to the rigidity of the vehicle. In this case, the surface roughness of the surface 22a on the outer wall 13 side of the convex portion 22 and the surface roughness of the surface 22b on the inner wall portion 14 side of the convex portion 22 are preferably Rz20 or more, more preferably 25Rz or more. Is exemplified. In addition, when the concave portion 12 and the convex portion 22 are press-fitted, the surface 12 a on the convex portion 22 side of the outer wall portion 13 of the concave portion 12 interferes with the surface 22 a on the outer wall portion 13 side of the convex portion 22, thereby causing the concave portion 12. The surface 12b of the inner wall portion 14 on the convex portion 22 side interferes with the surface 22b of the convex portion 22 on the inner wall portion 14 side.

Here, FIG. 14 shows the result of an experiment conducted by the inventor regarding the relationship between the surface pressure at which squeak noise is generated and the surface roughness.

In this experiment, a plurality of test specimens made of polypropylene with surface roughness were prepared. And, by contacting the end surface of each test body to which the surface roughness is imparted with the end surface of another test body to which the surface roughness is not imparted, and rubbing the two test bodies while applying a load, The surface pressure when squeak noise was generated was examined.

14 represents the surface roughness given to the specimen and the corresponding friction coefficient. The greater the surface roughness imparted to the specimen, the smaller the friction coefficient. The vertical axis represents the surface pressure when a squeak noise is generated from the contact surfaces of the two specimens. On this graph, the results of measuring the surface pressure when squeak noise was generated for each specimen were plotted.

According to this experimental result, it was found that when the surface roughness applied to the specimen was Rz10 or more, no squeak noise was generated at a surface pressure smaller than 2.5 MPa. In general, in a conventional air conditioning case to which surface roughness is not given, the surface roughness of each of the first case main body 11, the second case main body 21, the concave portion 12, and the convex portion 22 is Rz5 or less. According to this experiment, when the surface roughness of the specimen is Rz5 or less, there is a possibility that squeak noise may be generated with a surface pressure smaller than 2.5 MPa. Therefore, if the surface roughness of at least one of the contact surfaces 31 of the concave portion 12 and the convex portion 22 is set to Rz10 or more, the surface pressure of 2.5 MPa at which the squeak noise may be generated in the conventional air conditioning case 100 is generated. Even when it acts on 31, it is possible to suppress the generation of squeak noise. In addition, the surface pressure which acts on the contact surface 31 of the recessed part 12 and the convex part 22 changes according to the rigidity etc. of a vehicle. Therefore, the surface roughness applied to the convex portion 22 or the concave portion 12 may be increased according to the rigidity of the vehicle. In that case, the surface roughness applied to the convex portion 22 or the concave portion 12 is preferably Rz20 or more, more preferably 25Rz or more.

In the fourth embodiment described above, the surface roughness of the surface 22a of the convex portion 22 on the outer wall 13 side and the surface roughness of the surface 22b of the convex portion 22 on the inner wall portion 14 side are set as the first case main body 11 or the second case main body 21. It is formed larger than the surface roughness. Thereby, it is possible to reduce the friction coefficient of the contact surface 31 between the concave portion 12 and the convex portion 22 and reduce the frictional resistance generated on the contact surface 31. Therefore, the air conditioning case 100 can suppress the generation of squeak noise from the contact surface 31.

(Fifth embodiment)
A fifth embodiment will be described. In the fifth embodiment, the part for forming the surface roughness is changed with respect to the fourth embodiment, and the other parts are the same as those in the fourth embodiment. Therefore, only the parts different from the fourth embodiment will be described. To do. In the fifth to seventh embodiments described below, only an exploded view of the first case 10 and the second case 20 is shown, but the description of each part will be made on the assumption that they are assembled. .

As shown in FIG. 15, in the fifth embodiment, the surface roughness of the surface 12 a on the convex portion 22 side of the outer wall portion 13 of the concave portion 12 and the surface roughness of the surface 12 b on the convex portion 22 side of the inner wall portion 14 of the concave portion 12. The height is larger than the surface roughness of the first case body 11 or the second case body 21. In FIG. 15, the surface roughness formed on the surface 12 a on the convex portion 22 side of the outer wall portion 13 of the concave portion 12 and the surface 12 b on the convex portion 22 side of the inner wall portion 14 of the concave portion 12 is also schematically represented. . Even in the configuration of the fifth embodiment, the friction coefficient of the contact surface 31 between the concave portion 12 and the convex portion 22 can be reduced, and the frictional resistance of the contact surface 31 can be reduced. Therefore, 5th Embodiment can also have the same effect as 4th Embodiment mentioned above.

(Sixth embodiment)
A sixth embodiment will be described. The sixth embodiment is a combination of the fourth embodiment and the fifth embodiment.

As shown in FIG. 16, in the sixth embodiment, the surface roughness of the surface 22a of the convex portion 22 on the outer wall portion 13 side and the surface roughness of the surface 22b of the convex portion 22 on the inner wall portion 14 side are the first case. It is formed to be larger than the surface roughness of the main body 11 or the second case main body 21. The surface roughness of the surface 12a on the convex portion 22 side of the outer wall portion 13 of the concave portion 12 and the surface roughness of the surface 12b on the convex portion 22 side of the inner wall portion 14 of the concave portion 12 are the same as those of the first case body 11 or the second case. The case body 21 is formed to be larger than the surface roughness. Even in the configuration of the sixth embodiment, the friction coefficient of the contact surface 31 between the concave portion 12 and the convex portion 22 can be reduced, and the frictional resistance of the contact surface 31 can be reduced. Therefore, the sixth embodiment can achieve the same effects as the fourth and fifth embodiments described above.

(Seventh embodiment)
A seventh embodiment will be described. The seventh embodiment is a combination of the first embodiment and the fourth embodiment.

As shown in FIG. 17, in the seventh embodiment, the convex portion 22 of the second case 20 has a plate thickness in a sectional view that gradually decreases from the second case body 21 toward the bottom portion 15, as in the first embodiment. It has the taper part 23 which becomes. The relationship between the internal angle θ1 of the recess 12 and the taper angle θ2 of the taper portion 23 is θ1 <θ2.

In the seventh embodiment, the surface roughness of the surface 23 a on the outer wall 13 side and the surface roughness of the surface 23 b on the inner wall 14 side of the tapered portion 23 are the surface of the first case body 11 or the second case body 21. It is formed larger than the roughness. Therefore, the seventh embodiment can achieve the same operational effects as the first to sixth embodiments described above.

(Eighth embodiment)
An eighth embodiment will be described. In the eighth embodiment, the detailed shape of the rough surface formed on the tapered portion 23 of the convex portion 22 of the second case 20 included in the air conditioning case 100 and the manufacturing method for forming the rough surface on the tapered portion 23 are described. An example is shown. The “rough surface” is also referred to as “surface roughening”, and refers to a portion of the surface of the air conditioning case 100 where the surface roughness is larger than that of the second case body 21 or the first case body 11.

As shown in FIG. 18, in the eighth embodiment as well, as in the seventh embodiment described above, the convex portion 22 of the second case 20 has a thickness from the second case main body 21 to the tip 26 in the sectional view. The taper portion 23 gradually decreases toward the end. The surface roughness of the surface 23 b of the tapered portion 23 on the side of the ventilation path 30 and the surface roughness of the surface 23 a of the tapered portion 23 on the side opposite to the ventilation path 30 are larger than the surface roughness of the second case body 21. Is also formed large. In addition, the uneven | corrugated location of the surface shown with the code |

symbols

23a and 23b of FIG. 18 shows the position of the rough surface formed in the taper part 23 of the convex part 22, and does not show the direction of the unevenness | corrugation of a rough surface. .

FIG. 19 is an enlarged view of the portion indicated by reference numeral XIX in FIG. 18, schematically showing the detailed shape of the rough surface formed on the tapered portion 23 of the convex portion 22 of the second case 20. is there. As shown in FIG. 19, the rough surface formed on the tapered portion 23 of the convex portion 22 of the second case 20 has at least a plurality of first surfaces 41 and a plurality of second surfaces 42. In the following description, the center plane between the surface 23b on the ventilation path 30 side in the taper portion 23 and the surface 23a on the side opposite to the ventilation path 30 in the taper portion 23 is referred to as a center plane S1. The plurality of first surfaces 41 are inclined so as to approach the center surface S1 from the second case body 21 side toward the distal end 26 side. The second surface 42 is a portion of the predetermined first surface 41 on the tip 26 side and the second case body 21 of the other first surface 41 disposed on the tip 26 side of the predetermined first surface 41. The side part is connected. Thereby, the rough surface formed in the taper part 23 of the convex part 22 becomes a shape which can be formed by die cutting of normal injection molding without becoming an undercut shape in resin injection molding.

The plurality of first surfaces 41 and the plurality of second surfaces 42 are not limited to planes, and may be curved surfaces. Moreover, the connection location of the 1st surface 41 and the 2nd surface 42 may be gently connected, without being squared.

Next, an example of a manufacturing method for forming a rough surface on the tapered portion 23 of the convex portion 22 of the second case 20 will be described. In addition, the manufacturing method of the 2nd case 20 of this embodiment is not limited to the method demonstrated below.

As shown in FIG. 20, the second case 20 is formed by resin injection molding. In FIG. 20, the parting line of the 1st metal mold | die 51 and the 2nd metal mold | die 52 is shown with the code | symbol PL. In the resin injection molding, after the first mold 51 and the second mold 52 are clamped, a space formed between the first mold 51 and the second mold 52 (that is, a product portion) is formed. The second case 20 is formed by injecting and injecting the heat-melted resin, cooling, and solidifying.

As shown in FIG. 21, in the mold opening process of resin injection molding, the first mold 51 that forms the convex portion 22 of the second case 20 moves substantially parallel to the center plane S <b> 1 of the tapered portion 23. In addition, the uneven | corrugated location shown with the code |

symbol

51a, 51b of FIG. 21 is a rough surface for forming a rough surface with respect to the resin molded product (namely, taper part 23 of the convex part 22) in the 1st metal mold | die 51. FIG. It indicates the position of the formation portion, and does not indicate the direction of the unevenness of the rough surface formation portion.

FIG. 22 is an enlarged view of a portion indicated by reference numeral XXII in FIG. 21, and schematically shows the detailed shape of the rough surface forming portion of the first mold 51. As shown in FIG. 22, the rough surface forming portion of the first mold 51 includes a plurality of first forming surfaces 511 for forming the first surface 41 of the rough surface of the tapered portion 23 of the convex portion 22, and A plurality of second forming surfaces 512 for forming the second surface 42 of the rough surface of the tapered portion 23 of the convex portion 22 are provided. The plurality of first formation surfaces 511 and the plurality of second formation surfaces 512 are inclined so that the taper portion 23 of the convex portion 22 can be removed from the first mold 51. Therefore, in this manufacturing method, without providing a special mold structure such as a slide core in the first mold 51, the first mold 51 is moved substantially parallel to the center plane S1 of the tapered portion 23. It is possible to perform mold opening.

In the eighth embodiment described above, by providing the taper portion 23 on the convex portion 22 of the second case 20 included in the air conditioning case 100, the rough surface formed on the taper portion 23 is formed by normal injection molding. The shape can be formed by die cutting. Therefore, in the eighth embodiment, the configuration of the first mold 51 can be simplified, and the manufacturing cost can be reduced.

(Ninth embodiment)
A ninth embodiment will be described. In the ninth embodiment, the detailed shape of rough surfaces formed on the inner wall portion 14 and the outer wall portion 13 of the recess 12 included in the first case 10 included in the air conditioning case 100, and the inner wall portion 14 and the outer wall portion 13 of the recess 12. An example of the manufacturing method for forming a rough surface is shown.

As shown in FIG. 23, the recess 12 of the first case 10 is formed in a tapered shape. Specifically, in the recess 12, the interval between the surface 12 a on the inner wall portion 14 side of the outer wall portion 13 and the surface 12 b on the outer wall portion 13 side of the inner wall portion 14 is first from the

front end

16, 17 side. It is formed in a tapered shape so as to gradually become smaller toward the case body 11 side. The surface roughness of the surface 12a on the inner wall portion 14 side of the outer wall portion 13 of the recess 12 and the surface roughness of the surface 12b on the outer wall portion 13 side of the inner wall portion 14 of the recess 12 are as follows. It is formed larger than the surface roughness. In addition, the uneven | corrugated location of the surface shown with the code |

symbol

12a, 12b of FIG. 23 shows the position of the rough surface formed in the recessed part 12, and does not show the direction of the unevenness | corrugation of a rough surface.

FIG. 24 is an enlarged view of a portion indicated by reference numeral XXIV in FIG. 23 and schematically shows the detailed shape of the rough surface formed in the recess 12 of the first case 10. As shown in FIG. 24, the rough surface formed in the recess 12 of the first case 10 has at least a plurality of first surfaces 61 and a plurality of second surfaces 62. In the following description, the center plane between the surface 12a on the inner wall portion 14 side of the outer wall portion 13 of the recess 12 and the surface 12b on the outer wall portion 13 side of the inner wall portion 14 of the recess 12 is referred to as a center plane S2. The plurality of first surfaces 61 are inclined so as to approach the center surface S2 from the distal end 16 side of the outer wall portion 13 or the distal end 17 side of the inner wall portion 14 toward the first case body 11 side. The second surface 62 includes a portion of the predetermined first surface 61 on the first case body 11 side and the other first surface 61 disposed closer to the first case body 11 than the predetermined first surface 61. Of these, the outer wall portion 13 or the inner wall portion 14 is connected to the

tip

16 or 17 side portion. Thereby, the rough surface formed in the inner wall part 14 and the outer wall part 13 of the recessed part 12 becomes a shape which can be formed by die cutting of a normal injection molding, without becoming an undercut shape in the resin injection molding.

The plurality of first surfaces 61 and the plurality of second surfaces 62 are not limited to planes, and may be curved surfaces. Moreover, the connection location of the 1st surface 61 and the 2nd surface 62 may be gently connected, without being squared.

Next, an example of a manufacturing method for forming a rough surface on the inner wall portion 14 and the outer wall portion 13 of the recess 12 of the first case 10 included in the air conditioning case 100 will be described. In addition, the manufacturing method of the 1st case 10 of this embodiment is not limited to the method demonstrated below.

As shown in FIG. 25, the first case 10 is also formed by resin injection molding. In FIG. 25, a parting line between the third mold 53 and the fourth mold 54 is indicated by a symbol PL. In the resin injection molding, after the third mold 53 and the fourth mold 54 are clamped, the space formed between the third mold 53 and the fourth mold 54 (that is, the product portion) is formed. The first case 10 is formed by injecting, injecting, and cooling and solidifying the resin melted by heating.

As shown in FIG. 26, in the resin injection molding mold opening process, the fourth mold 54 forming the recess 12 of the first case 10 moves substantially parallel to the center plane S2 of the recess 12. In addition, the uneven | corrugated location shown with the code |

symbol

54a, 54b of FIG. 26 is a rough surface for forming a rough surface with respect to the resin molded product (namely, recessed part 12 of the 1st case 10) in the 4th metal mold | die 54. FIG. It indicates the position of the formation portion, and does not indicate the direction of the unevenness of the rough surface formation portion.

FIG. 27 is an enlarged view of the portion indicated by reference numeral XXVII in FIG. 26, and schematically shows the detailed shape of the rough surface forming portion of the fourth mold 54. FIG. As shown in FIG. 27, the rough surface forming portion of the fourth mold 54 includes a plurality of first forming surfaces 541 for forming the first surface 61 of the rough surface of the concave portion 12 and the rough surface of the convex portion 22. A plurality of second forming surfaces 542 for forming the second surface 62 of the surface. The plurality of first formation surfaces 541 and the plurality of second formation surfaces 542 are inclined so that the concave portion 12 can be removed from the fourth mold 54. Therefore, in this manufacturing method, the fourth mold 54 is moved substantially in parallel to the center plane S2 of the recess 12 without providing a special mold structure such as a slide core in the fourth mold 54, thereby providing a mold. Opening is possible.

In the ninth embodiment described above, the concave portion 12 included in the first case 10 included in the air conditioning case 100 is formed in a tapered shape, so that the rough surface formed in the concave portion 12 can be removed by normal injection molding. The shape can be formed. Therefore, in the ninth embodiment, the configuration of the fourth mold 54 can be simplified, and the manufacturing cost can be reduced.

(Other embodiments)
The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

(1) In each of the above embodiments, the air conditioning case 100 constituting the outer shell of the air conditioner 1 mounted on a vehicle has been described, but the present invention is not limited thereto. In other embodiments, the air conditioning case 100 may constitute a housing of the air conditioner 1 used for a moving body other than a vehicle or a building.

(2) In the above embodiments, the air conditioner 1 to which the air conditioning case 100 is applied has been described as including a blower, an evaporator, a heater core, and the like, but is not limited thereto. The air conditioner 1 may include a cooling device other than the evaporator or a heating device other than the heater core. The air conditioner 1 may include at least one of a blower, a cooling device, and a heating device.

(Summary)
According to the 1st viewpoint shown by one part or all part of the above-mentioned embodiment, the air-conditioning case which comprises the housing | casing of an air conditioner is provided with a 1st case main body, a 2nd case main body, a recessed part, and a convex part. The first case body forms a ventilation path through which air flows inside the housing. The second case body forms a ventilation path inside the casing together with the first case body. The recess is provided at an end of the first case body on the second case body side, and includes an inner wall portion located on the ventilation path side, an outer wall portion located outside the housing, and an inner wall portion on the first case body side. A bottom portion connecting the outer wall portion; The convex portion is provided at an end portion of the second case main body on the first case main body side, has a taper portion in which a plate thickness in a cross-sectional view gradually decreases from the second case main body toward the bottom portion, and the inner wall portion of the concave portion And the outer wall portion. Here, the taper angle formed by the surface of the taper portion on the outer wall portion side and the surface of the taper portion on the inner wall portion side is formed by the surface of the outer wall portion on the inner wall portion side and the surface of the inner wall portion on the outer wall portion side. Greater than the interior angle.

According to the second aspect, the concave portion has a tapered shape in which the interval between the inner wall portion and the outer wall portion gradually increases from the bottom side toward the second case main body side.

According to this, it is possible to widen the opening formed on the opposite side to the bottom of the recess. Therefore, this air conditioning case can improve the assemblability of the first case and the second case.

According to the third aspect, the convex portion further includes a straight portion between the tapered portion and the second case main body in which the change in the plate thickness in the sectional view is smaller than that of the tapered portion.

According to this, the contact surface between the straight part and the concave part of the convex part is located far from the bottom part. Therefore, the reaction force received by the straight portion from the inner wall portion and the outer wall portion of the concave portion is reduced, and the frictional resistance generated between the straight portion and the concave portion can be reduced. Therefore, this air conditioning case can suppress the generation of squeak noise from the contact surface.

According to a fourth aspect, the convex portion further has a tip portion having a taper angle larger than the taper angle of the taper portion on the side opposite to the second case body of the taper portion.

According to this, it is possible to easily insert the convex portion into the opening portion of the concave portion by providing the tip portion on the convex portion. Therefore, this air conditioning case can improve the assemblability of the first case and the second case.

According to the fifth aspect, the surface roughness of at least one of the surface on the taper portion side of the outer wall portion or the surface on the outer wall portion side of the taper portion is larger than the surface roughness of the first case body or the second case body. Further, the surface roughness of at least one of the surface on the tapered portion side of the inner wall portion or the surface on the inner wall portion side of the tapered portion is larger than the surface roughness of the first case main body or the second case main body.

According to this, it is possible to reduce the friction coefficient of the contact surface between the outer wall portion and the taper portion, and to reduce the friction coefficient of the contact surface between the inner wall portion and the taper portion. Therefore, the frictional resistance generated on the contact surface between the convex portion and the concave portion is reduced. Therefore, this air conditioning case can suppress the generation of squeak noise from the contact surface.

According to a sixth aspect, the air conditioning case constituting the housing of the air conditioner includes a first case main body, a second case main body, a concave portion and a convex portion. The first case body forms a ventilation path through which air flows inside the housing. The second case body forms a ventilation path inside the casing together with the first case body. The recess is provided at an end of the first case body on the second case body side, and includes an inner wall portion located on the ventilation path side, an outer wall portion located outside the housing, and an inner wall portion on the first case body side. A bottom portion connecting the outer wall portion; A convex part is provided in the edge part by the side of a 1st case main body among 2nd case main bodies, and it fits between the inner wall part and outer wall part of a recessed part. Here, the surface roughness of at least one of the surface on the convex portion side of the outer wall portion of the concave portion or the surface on the outer wall portion side of the convex portion is larger than the surface roughness of the first case main body or the second case main body. Further, the surface roughness of at least one of the surface on the convex portion side of the inner wall portion of the concave portion or the surface on the inner wall portion side of the convex portion is larger than the surface roughness of the first case main body or the second case main body.

According to this, it is possible to reduce the friction coefficient of the contact surface between the outer wall portion and the convex portion and to reduce the friction coefficient of the contact surface between the inner wall portion and the convex portion. Therefore, the frictional resistance generated on the contact surface between the convex portion and the concave portion is reduced. Therefore, this air conditioning case can suppress the generation of squeak noise from the contact surface.

According to the seventh aspect, the surface roughness of at least one of the surface on the convex portion side of the outer wall portion or the surface on the outer wall portion side of the convex portion has a ten-point average roughness of Rz10 or more. Further, the ten-point average roughness of the surface roughness of at least one of the surface on the convex portion side of the inner wall portion or the surface on the inner wall portion side of the convex portion is Rz10 or more.

The inventor conducted an experiment to examine a load when a squeak noise is generated by rubbing a predetermined test body to which surface roughness is imparted with another test body. As a result, it has been found that the occurrence of squeak noise can be effectively suppressed with respect to a conventional air conditioning case where surface roughness is not imparted by setting the surface roughness imparted to at least one of the convex portion or the concave portion to Rz10 or more. It was.

According to the eighth aspect, the convex portion has a tapered portion whose plate thickness in a sectional view gradually decreases from the second case main body toward the bottom portion. The surface roughness of at least one of the surface on the tapered portion side of the outer wall portion or the surface on the outer wall portion side of the tapered portion is larger than the surface roughness of the first case main body or the second case main body. Further, the surface roughness of at least one of the surface on the tapered portion side of the inner wall portion or the surface on the inner wall portion side of the tapered portion is larger than the surface roughness of the first case main body or the second case main body.

Claims

An air-conditioning case constituting the housing of the air-conditioning device (1),
A first case body (11) forming a ventilation path (30) through which air flows inside the housing;
A second case body (21) that forms the ventilation path inside the casing together with the first case body;
An inner wall (14) located on an end of the first case body on the second case body side, located on the ventilation path side, an outer wall (13) located outside the housing, and the first case body A recess (12) having a bottom (15) for connecting the inner wall and the outer wall on the case body side;
A taper portion (23) provided at an end portion of the second case body on the first case body side, the plate thickness in a sectional view gradually decreases from the second case body toward the bottom; A convex portion (22) fitted between the inner wall portion and the outer wall portion of the concave portion,
The taper angle (θ2) formed by the surface (23a) of the tapered portion on the outer wall portion side and the surface (23b) of the tapered portion on the inner wall portion side is the surface of the outer wall portion on the inner wall portion side ( 12a) and an air conditioning case that is larger than the inner angle (θ1) formed by the outer wall portion side surface (12b) of the inner wall portion.
The air conditioning case according to claim 1, wherein the concave portion has a tapered shape in which a distance between the inner wall portion and the outer wall portion gradually increases from the bottom side toward the second case main body.
The said convex part further has a straight part (25) between the said taper part and the said 2nd case main body in which the change of the plate | board thickness in a cross sectional view is less than the said taper part. Air conditioning case.
The said convex part further has a front-end | tip part (24) with a taper angle in a cross sectional view larger than the taper angle of the said taper part on the opposite side to the said 2nd case main body of the said taper part. The air-conditioning case as described in any one.
The surface roughness of at least one of the surface (12a) of the outer wall portion on the taper portion side or the surface (23a) of the taper portion on the outer wall portion side is the surface roughness of the first case body or the second case body. Bigger than
The surface roughness of at least one of the surface (12b) of the inner wall portion on the taper portion side or the surface (23b) of the taper portion on the inner wall portion side is the surface roughness of the first case body or the second case body. The air conditioning case according to any one of claims 1 to 4, wherein the air conditioning case is larger than the above.
An air-conditioning case constituting the housing of the air-conditioning device (1),
A first case body (11) forming a ventilation path (30) through which air flows inside the housing;
A second case body (21) that forms the ventilation path inside the casing together with the first case body;
An inner wall (14) located on an end of the first case body on the second case body side, located on the ventilation path side, an outer wall (13) located outside the housing, and the first case body A recess (12) having a bottom (15) for connecting the inner wall and the outer wall on the case body side;
A convex portion (22) provided at an end portion of the second case main body on the first case main body side and fitted between the inner wall portion and the outer wall portion of the concave portion;
The surface roughness of at least one of the surface (12a) on the convex portion side of the outer wall portion of the concave portion or the surface (22a) on the outer wall portion side of the convex portion is the first case main body or the second case main body. Greater than the surface roughness of
The surface roughness of at least one of the surface (12b) on the convex portion side of the inner wall portion of the concave portion or the surface (22b) on the inner wall portion side of the convex portion is the first case main body or the second case main body. The air conditioning case is larger than the surface roughness.
The surface roughness of at least one of the surface on the convex portion side of the outer wall portion or the surface on the outer wall portion side of the convex portion has a ten-point average roughness of Rz10 or more,
The air conditioning case according to claim 6, wherein the surface roughness of at least one of the surface on the convex portion side of the inner wall portion or the surface on the inner wall portion side of the convex portion has a ten-point average roughness of Rz10 or more.
The convex portion has a tapered portion (23) whose plate thickness in a cross-sectional view gradually decreases from the second case main body toward the bottom portion,
The surface roughness of at least one of the surface (12a) of the outer wall portion on the taper portion side or the surface (23a) of the taper portion on the outer wall portion side is the surface roughness of the first case body or the second case body. Bigger than
The surface roughness of at least one of the surface (12b) of the inner wall portion on the taper portion side or the surface (23b) of the taper portion on the inner wall portion side is the surface roughness of the first case body or the second case body. The air conditioning case according to claim 6 or 7, wherein the air conditioning case is larger than the above.