FR2505010A1 - End seal for air conditioning pivoted damper - has shutter provided with resilient tubular sealing lips to run against bearing ends - Google Patents

Abstract

The device is for rotatably mounting a sealing shutter in piping. The wall of the piping comprises at least a cylindrical bearing for receiving a cylindrical end-piece formed on one side of the shutter. The bearing is surrounded by a tubular cylindrical projection which extends towards the inside of the piping and seal with a tubular lip made of a resiliently deformable material and which is part of the shutter. The tubular lip is pref. of frustoconical shape. The tubular lip forms the edge of a cup made of a resiliently deformable material and carried by the shutter.

Description

 The invention relates to a device for controlling an appliance for heating and defrosting fitted to a motor vehicle.

 It is known that a device equipping a motor vehicle for heating the passenger compartment and also the defrosting of the windshield is controlled-according to the climatological conditions and also the wishes of the occupants.

 The device is supplied with air, most often a mixture of hot air and cold air, and it is important to direct the air flow in variable proportions towards one or more duct (s) provided (s) for heating air and one or more piping (s) provided for defrost air.

 The invention provides a simple device, of easy construction, with sQr operation, intended to ensure the routing of air to one and / or the other of the heating and defrosting pipes.

 I1 uses two flaps, one of which controls the heating pipe and the other the defrost pipe, and each of the flaps is a non-deformable unit, that is to say does not include moving parts, one with respect to to the other.

 The invention provides means for ensuring easy assembly of the flaps and their control from an actuating lever, while respecting the sealing conditions with respect to the ataosphere external to the box or casing in which the shutters.

 The device for mounting a shutter according to the invention forming part of an air conditioning installation of a motor vehicle, in particular for defrosting and heating, and driving the accumulator of air towards a heating or defrosting pipe, is characterized in that the shutter is rotatably mounted, by circular cylindrical end pieces which it presents on its opposite sides, in bearings which are present in opposite walls of the pipe which it is intended to control.

In the description which follows, given by way of example, reference is made to the appended drawings, in which
- Figure 1 is a sectional view of the part of a shoemaker or casing with two pipes whose access is controlled by two flaps according to the invention
- Figure 2 is a front view, partially broken away, of a flap according to the invention
- Figure 3 is a sectional view along the line ril-
III of figure 2
- Figure 4 is a sectional view, on a larger scale, of a flap part
- Figure 5 is a front view, with sections, showing the flap mounted in the case
- Figure 6 is a sectional view along line VI-VI of Figure 5; and
- Figure 7 is a sectional view on a large scale of a flap edge.

 From the chamber 31 (FIG. 1), in which the air to be distributed reaches in the direction of the arrow 91, come a heating pipe 32, limited, in particular, by walls 33 and 34 forming part of a shoemaker casing 35, and a deicing line 36, limited, in particular, by walls 37 and 38.

 The wall 33 has, at its connection with the wall 39 of the chamber 31, a rib 41 provided for the support of the longitudinal edge 42 of a first flap 43, or heating flap, mounted for rotation about an axis 44 parallel to the rib 41. The wall 33 does not extend beyond the rib 41, thus providing, for the edge 42 of the flap 43, a free stroke in the case of a rotation of said flap in the direction of the arrow f2 for which the edge 42 moves away from the rib 41.

 The wall 34 has, as a granny, a rib 45, provided for the support of the longitudinal edge 46 of the flap 43 opposite the edge 42, the movement of the edge 46 relative to the rib 45 taking place freely when said flap 43 rotates in the direction of arrow f2.

 At its connection with the wall 40 of the chamber 31, opposite the wall 39, the wall 37 of the defrosting pipe 36 has a rib 51 provided for the support of the longitudinal edge 52 of a second flap 53, or flap of defrost, mounted for rotation about an axis 54, parallel to axis 44. from the rib 51, the wall 37 has a cylindrical part 55, centered on the axis 54, connecting at 56 to a part 57 of the wall 37 more distant from the axis 54 than the cylindrical part 55.

 Likewise, the wall 38 of the defrost duct or pipe 36 has a rib 58, provided for supporting the longitudinal edge 59 of the flap 53 opposite the edge 52. From the rib 58, the wall 38 comprises a cylindrical part 61 , centered on the axis 54, of the same length as the cylindrical part 55 and which is extended by a part 62 more distant from the axis 54 than the cylindrical part 61.

 The two parts 43 and 53 are identical. They have a generally rectangular shape and include two panels 65, 66 (Figures 2 and 3) forming an obtuse angle between them. A flap has a body 67, advantageously made of plastic, with two branches 68 and 69 connecting along a longitudinal line 71 and forming between them an obtuse angle of the order of 1500 without this indication, of course, having a limiting character.

 Said body has on line 71 two holes 72 and 73 close to the transverse edges 74 and 75 of said body as well as holes aligned in two longitudinal rows, Sespectively 76 and 77. Said holes contribute to the joining with said body of a joint in rubber referenced generically by 78, in the general shape of a rectangular ring, overmolded on said body and which thus passes through said body by cores 79 housed in the holes 72, 73, 76, 77.

The body 67 of the shutter has, at one of its transverse ends, means 81 for mounting it in rotation in a wall of the bootmaker and at its opposite end means 82 for mounting it in rotation in an opposite wall of the bootmaker, and its drive, around an axis, respectively 44 and 54, depending on whether there is a flap 43 or a flap 53,
The mounting device 81, and for longitudinal fixing by clipping, comprises a tubular end piece 83.

Said tip, projecting relative to the transverse edge 74 of the body 67, is spaced from the internal lateral surface 85 (FIG. 4) of a cup 86 forming part of the joint 78 and whose edge 87 is tapered towards its external edge 88 so as to form a lip, the bottom 89 of the bowl comprising cores 91 passing through corresponding holes provided in a disc 90 forming part of the body 67 to anchor it.

 The tubular end piece 83 cooperates (FIGS. 5 and 6) in rotation through its external surface with a cylindrical surface 92 which is provided by an external boss 93 of a wall 94 of the shoemaker perpendicular to the axis, 44 or 54, for mounting the flap , 43 or 53, respectively. The boss 93 has a first part 95 whose internal surface is the cylindrical surface 92 and a second part, 96, of larger diameter whose internal surface 97 is connected to the internal surface 92 by shoulders 98 and 99 intended to constitute stops for a lug 101 that has the external surface 102 of the tubular endpiece 83 and thus limits the rotational movement of the flap 43 or 53, respectively around its axis 44 or 54.

 The boot wall 94 has, towards the inside of the heating pipe or the defrost pipe, an annular projection 103, the cylindrical part 104 of which cooperates with sealing by its external surface with the internal surface 85 of the lip 87.

 At its other end, the body 67 is extended by a crown 111 dependent on a disc 110 forming part of the body 67 (Figures 2 and 5); disc 110 further depends, in its center, a tubular end piece 113. The crown 111 has on its edge 114 an external toothing 115. Disc 110 is secured, by overmolding, the bottom 116 of an outer bowl 117 forming part of the joint generically referenced by 78 and whose lip-shaped edge 118 cooperates with the external cylindrical surface of an annular projection 119 depending on a wall 121 limiting the heating or defrosting pipe away from the wall 94. the wall 121 depends, towards the outside, coaxial with the annular projection 119, a cylindrical cup 122, with window 120 (FIG. 5) from the bottom 123 on which depends a cylindrical bearing 124 for receiving the tubular end piece in rotation 113 crossing the bottom 123. The walls 94 and 121 are part of two half-shells each having half of a boss 93 and half of a bowl 122, so as to allow the introduction of the flap, 43 or 53 , provided with its tubular tip 83 and its tubular tip 113.

 The peripheral seal 78 of the shutter comprises not only the bowls 86 and 117, the edges of which have thinned edges, but also a frame 131 with longitudinal strips 132 and 133 and transverse strips 134, 130, on which the bowls 86 and 117 directly depend. .

 Each strip constituting the frame 131 comprises a body 135 (FIG. 7), with two branches 136 and j37 enclosing the body 67 of the shutter. The body 135 is extended by a thinner part 138 in alignment with the branch 68 of the panel or the branch 69 of the panel and ending in a cylindrical rod 139.

 In the condition shown in FIG. 1, the flaps 43 and 53 are both in their closed position, shown diagrammatically by B and A on the circles in dotted lines centered respectively around axes 44 and 54. The edges 42 and 46 of the rubber gasket or the like 78 of the flap 43 controlling the inlet of the heating channel 32 cooperate with the ribs 41 and 45 and thus ensure a tight separation between the said pipe and the chamber 31.

 Similarly, the edges 52 and 59 of the flap 53, also constituted by the rubber seal 78 of the said flap, cooperate with the ribs, respect vement 51 and 58, and ensure the sealed separation of the defrosting pipe 36 relative to the hemp 31.

 Bour both flaps, the seal along the transverse catés is obtained by cooperation of the edges 87 and 118 of the bowls 86 and 117 with the annular projections 103 and 119 respectively of the housing 35.

 Sar the rotation of the flap 43 around the axis 44, the heating pipe 32 is placed in communication with the chamber 31, the air contained in the latter passing through the channel which is created immediately between the longitudinal edges respectively 42 and 46 of said flap and the walls 33 and 34 of said pipe.

Sar against, during this rotation, the longitudinal edge sa, constituted by the rubber seal, of the flap 53, cooperates with the internal surface 181 of the cylindrical wall 55 and the longitudinal edge 59 cooperates with the internal surface 182 of the part cylindrical 61 of the wall 38. Thus, during this phase, no communication is established between the chamber 31 and the defrosting pipe 36. The flaps 43 and 53 are then respectively in the positions marked
Of your. In this first phase, heating of the passenger compartment is ensured but no defrosting action takes place.

 The longitudinal edge 42 of the flap 43 passes from the position shown in D, corresponding to the end of the first phase, to the position shown in F, corresponding to the end of the second phase, and the longitudinal edge 52 of the flap 53 goes from the position shown in C, corresponding to the end of the first phase, to the position shown in E, corresponding to the end of the second phase.

 In this condition, the flap 43 unmasks more than in the previous phase the inlet of the heating pipe 32 and the flap 53 has unmasked the inlet of the defrost pipe 36 which had remained completely hidden in the previous phase. Heating of the passenger compartment is increased and a defrosting action is exerted.

Then, the flap 49 passes from the position for which its edge 42 is in F to that for which its edge 42 is in
H, the seal 78 of said flap being in abutment contact with a rib 183 provided on the wall 62. In this position, the opposite longitudinal edge 46 of the flap 43 is in abutment cooperation with the wall 35. The orifice of the pipe heater 32 is again completely closed, as in the initial condition, and with a good seal due to the cooperation of the rubber seal 78 of the flap 43 with the walls 62 and 33 respectively, and also of the lips 87 of the rubber bowls with annular crowns 103 and 111.

 Sar against, for this position, the longitudinal edge 52 of the defrost flap 53 is in abutment cooperation as shown in G with the wall 38 while the opposite longitudinal edge 59 is in the chamber 31, the flap thus providing a wide interval of circulation between said chamber 31 and the defrost pipe 36o In this condition, all the hot air arriving in the room 31 as shown by the arrow f1 is routed in the defrost pipe 36.

Claims (9)

 1. Device for rotationally mounting a shutter in a pipeline, in particular in a heating or air conditioning installation of the passenger compartment of a motor vehicle, characterized in that the wall of the pipeline comprises at least one cylindrical bearing suitable for receiving a cylindrical end piece presented by a side of the flap, this bearing being surrounded by a tubular cylindrical projection which is oriented towards the inside of the pipe and cooperates with sealing-with a tubular lip made of elastically material deformable forming part of the shutter.  2. Device according to claim 1, characterized in that the tubular lip is of frustoconical shape.  3. Device according to claim 1 or 2, characterized in that the tubular lip forms the edge of a bowl of elastically deformable material carried by the flap.  4. Device according to claim 3, characterized in that the bottom of each bowl rests on a disc or an annular surface that has the corresponding side of the flap.  5. Device according to claim 3 or 4, characterized in that lesdités cups are part of a seal bordering the sides of the flap.  6. Device according to claim 5, characterized in that said seal is overmolded on the periphery of the flap.  7. Device according to one of the preceding claims characterized in that it comprises two bearings, one of which is formed by a blind orifice in the wall of the pipe while the other is formed by a cylindrical orifice passing through the wall opposite of the pipeline.  8. Device according to claim 7, characterized in that the tip of the flap housed in the blind hole of the wall of the pipe has a lug or a projection cooperating in abutment with shoulders of said blind hole.  9. Device according to claim 7, characterized in that the side of the flap having the end piece housed in the through hole of the wall of the pipe comprises a toothing formed on a circular or cylindrical crown surrounding said end piece.