FR2801940A1 - HEATING AND / OR AIR CONDITIONING SYSTEM WITH A MOTOR SUPPORT MOUNTED ON A PULSE BOX - Google Patents

Abstract

The invention relates to a heating and / or air conditioning installation having a blower assembly comprising a motor support (1) mounted on a housing (2). It is characterized in that the motor support (1) and the housing (2) respectively have a first and a second sealing ramp, one of which is a sealing skirt (14) and the other of which is an edge. sealing (24). The motor support (1) and the housing (2) each have at least one inclined screwing ramp (16, 26), so that, in a screwing position of the motor support (1) on the housing (2), the sealing skirt (14) is pressed against the sealing edge (24).

Description

PRESENT HEATING AND / OR AIR CONDITIONING SYSTEM

  AN ENGINE MOUNT MOUNTED ON A PULSE BOX.

  The subject of the present invention is a heating and / or air conditioning installation comprising an air blower assembly comprising a

  engine suppooort mounted on a box.

  Such an installation is known in particular from -a French Patent Application FR 2,741,842 filed on

November 1995 by the Applicant.

  In this, the motor support has a planar annular skirt, as well as means for fixing bayonet type for the purpose of fixing to a wall.

annular housing.

  This type of attachment is particularly suitable for pulsers whose volute has an increasing section depending on the angle, from the inlet to

the exit of the scroll.

  The implementation of this solution in the case of a volute which has a double evolution (axial and radial) is not satisfactory, because the search for a plane annular sealing re on implies eliminating any axial evolution of the volute in the region

  between the engine mount and the housing.

  The basic idea of the invention is to make the connection between the engine support and the housing in a

helical region.

  The invention thus relates to a heating and / or air conditioning installation having an oulseur assembly comprising an engine support mounted on a housing, characterized in that the engine support and the housing respectively have a first and a second sealing ramp, the l one is a sealing skirt and the other of which is a sealing edge, and in that the motor support and the housing each have at least one inclined screwing ramp, so that in a screwing position of the support motor on the housing, the sealing skirt is pressed against the sealing edge. Said plating of the sealing skirt on the sealing edge is advantageously carried out so as to imolicate an elastic deformation of the sealing skirt. This deformation can be enough to create a

  satisfactory sealing, without interposition of a seal.

  Advantageously, the first sealing ramp, carried by the engine support, is a sealing skirt, and the second sealing ramp, carried

  through the housing, is a sealing edge.

  The sealing ramps and / or the ramps

  screwing can be helical.

  The engine mount and the housing have

  advantageously a plurality of screwing ramps.

  According to a preferred embodiment, the screwing ramps of the support and of the housing have steeper slopes than those of the sealing ramps, this

  which allows for progressive locking.

  The screwing ramps of the motor support and / or of the housing are advantageously formed by several sections angularly spaced from one another and offset axially with respect to each other in the

  axial direction (Z) of the blower assembly.

  The invention can be characterized in that the screwing ramps are arranged in such a way that, as the motor support is screwed onto the housing: - firstly, an external face S0 of at least a screwing ramp of the motor support is in contact with an external face of at least one screwing ramp of the housing, keeping the skirt spaced apart

  and the sealing ramp.

  For example, this spacing e gradually decreases until the sealing skirt and the sealing ramp come into contact (start of the second step) -in a second step, the sealing skirt slides on the edge of tightness, without the screwing ramps of the motor support and the housing being in contact; - in a third step, by bringing the internal faces of the screwing ramps of the motor support and the housing, the sealing skirt either

  elastically deformed against the sealing edge.

  The sealing ramp of the motor support may have ends connected by an inclined ramp. A screwing ramp of the motor support can then have half-ramps arranged on either side

on the other of the inclined ramp.

  In said first step, the external face of a first half-ramp can be in contact with the external face of a screwing ramp of the housing, while the second half-ramp is not in contact with a

housing screwing ramp.

  In said third step, the internal face of a second half-ramp can be in contact with the internal face of a screwing ramp of the housing, while the first half-ramp is not in contact with a

housing screwing ramp.

  Sealing, advantageously carried out by the sealing skirt elastically deformed on the sealing edge, can optionally be carried out, in a complementary or alternative manner, by a seal, in particular attached, for example by overmolding, formed for example in a material of the elastomer type, and carried by the housing sealing ramp and / or by the ramp

the engine support.

  The invention is particularly applicable to the case of a pulser whose volute has at least one axial helical evolution, and in this case, it is advantageous that the second sealing ramp has

  substantially the same helical evolution as the scroll.

  Other characteristics and advantages of the invention will appear better on reading the

  description which follows, given by way of example not

  limiting, in conjunction with the accompanying drawings, in which: - Figures la and lb show respectively in perspective and in side view, a motor support according to a preferred embodiment of the invention; - Figures 2a and 2b respectively illustrate in partial section and in profile view, the establishment by screwing of the motor support according to Figures la and lb, on a blower housing; - And Figures 3a to 3c illustrate the steps of this assembly, in the case of a blower housing

  having a ferrule with radial and axial evolution.

  According to Figures la and lb, an engine support 1 is constituted by a molded part, generally made of plastic. The support has an engine housing 10 surrounded by an annular region delimited by an inclined bottom 17 and an internal edge 18 of a channel of a

ferrule 25 (see FIG. 2a).

  A helical edge 12 is bordered by a skirt 14, advantageously produced so as to be elastically deformable by pressing on its face 141 which cooperates with a sealing edge 24 of the housing 2 (see FIG. 2a). The ends 12a and 12b of the helical edge 12 can be connected together by a ramp of

inclined ascent 100.

  The internal edge 19 which runs along the skirt 14 carries

  helical locking ramps 16.

  In addition, the helical sidewalk 12 carries one or more snap-fastening elements 31 intended to cooperate with one or more complementary elements 32 of the boliier 2 (see FIG. 3a to 3c) to maintain

  locked in position once assembled.

  The suppor: motor 1 carries the motor 1 '(figure

  2a) and a blower turbine 11 (Figures 3a to 3c).

  The housing 2 (FIGS. 2a and 3a to 3c) has two half-volutes 21 and 23 assembled in 27 e: defining a volute channel 25 surrounding the oulseur turbine. Its section increases progressively as one approaches its outlet 29, this evoution taking place in a helical manner both radially and axially (along the Z axis). Evolution

  axial delimits an edge 22 of helical profile.

  To allow the engine support 1 to be fixed on the housing 2, the housing 2 has, near its edge 22, and on the internal side thereof, helical ramps 26 which cooperate with the previously described helical ramps 16 of the support

engine i.

  The assembly is carried out as follows: The engine support 1 is presented in the axis of the housing 2 (FIG. 3a); it is then lowered in the Z direction to be positioned on the housing 2 (Figure 3b. In this approach and guide position (first step), and as illustrated in the left part of Figure 2b, the bearing face external 16, ramps 16 is in contact with the external support face 261 of the homologous ramps 26 while maintaining the skirt 14 spaced from the sealing ramp 24, by a distance e (see left part of FIG. 2b). A rotation of the support 1 decreases this distance e until it is canceled. The skirt 14 then rests (without deformation) on the ramp 24 and the ramps 16 and 26 are no longer in contact. The skirt 14 slides on the ramp sealing on an angular sliding zone (second step). Continued rotation of the support 1 has the effect that at the start of the third step, the ramps 16 come into contact by their internal bearing face 162 with the face of internal support 26 of the ramps 26 which follow the previous ramps 26

by circular permutation.

  To this end, the successive sections of the ramps 16 and 26 are not located in the continuity of each other, as their evolution in hnei: e would like, but are on the contrary, offset axially (axis X) with respect to this continuity , from a distance AX {see fig. 2b) The screwing ramps 26 having a pitch greater than that of the sealing ramp 24, the continuation of the screwing causes, by contact between the internal faces 162 and 262 of the ramps 16 and 26, a progressive pressing of the skirt 14 on the ramp 24, o, i5 dars e ioJsième time, an elastic deformation ce 'a skirt 14, until reciprocal latching of the locking elements 31, 32. At this position, one obtains a

locking with seal.

  The extent of the angular zones of relative sliding between the skirt 14 and the ramp 24, and of the angular zone of compression of the skirt 14 depends on the relative difference between the steps of the ramp 24 and the screwing ramps (16, 26), the functional clearance between two successive ramp regions 26 and the thickness of the regions of

ramp 16.

  For example, the relative sliding zone A can extend over approximately 25 and the clamping zone B

can span approximately 10.

  The invention thus makes it possible to produce an etanceiteite on a helical zone by deformation of a flexible Aupe 14, which can be located on the motor support. The regularity of the ramp ensures this function with a wide angular dispersion on the

motor position.

  Ès5 The screwing ramps make it possible to limit the angular stroke during which the skirt is compressed during assembly to ensure sealing, thanks to the difference in pitch between the sealing ramp and the

screwing ramps.

  Of course, forms other than helical ramps can be provided. For example, the ramps 26 may have a profile providing guidance along a route, of any desired profile, and the ramps may have reduced dimensions in order to be able to follow any profile that may be chosen for

the ramps 16.

  The screwing ramps 16a and 16b, which are located near the ends 12a and 12b of the edge 12 which are connected by the ascent ramp 100, advantageously constitute two half-ramps which each provide a

  I5 part of the functions of the other ramps.

  During the first time, the external face 16: of the screwing ramp 16b of the motor support 1 is in contact with the external face 26: of a screwing ramp 26 of the housing 2, while the screwing ramp 16a of the motor support 1 is not in contact with a housing screwing ramp. During the third stage, the internal face 16q of the screwing ramp 16a of the motor support 1 es: in contact with the internal face 262 of a screwing ramp 26 of the housing 2, while the screwing ramp 16b of the motor support 1 is not in contact with a

housing screwing ramp 2.

Claims (13)

  1. Heating and / or air conditioning installation having a blower assembly comprising an engine support mounted on a housing, characterized in that the engine support (1) and the shoemaker (2) respectively have a first and a second sealing ramp one of which is a sealing skirt (14) and ionh The other is a sealing edge (24), and in that the suooppor: motor (1) and the housing (2) each have at least one inclined screwing ramp (16, 26), so that in a screwing position of the motor support (1) on the housing (2), the sealing skirt (14)   is pressed against the sealing edge (24).   2. Installation according to claim 1, characterized in that said plating involves a   elastic deformation of the sealing skirt (14).   3. Ir.stallation according to one of claims 1   or 2, characterized in that the first sealing ramp is a sealing skirt (14) and in that the second sealing ramp is a sealing edge (24).   4. Installation according to one of the claims   orecedent, characterized in that the sealing ramps (14, 24) and / or the screwing ramps 16, 26) are helical.   5. Installation according to one of the claims   previous, characterized in that the motor support (1) e: e housing (2) have a plurality of ramps screwing (16, 26).   6. Installation according to one of the claims   previous, characterized in that the screwing ramps (16, 26) of the motor support (1) and of the box (2) have steeper slopes than the slope of the ramps sealing (14, 24).   7. Installation according to one of claims 5   or 6, characterized in that the screwing ramps of the engine support (1) and / or of the housing (2) are formed of several sections spaced angularly from one another and offset axially with respect to each other   in an axial distance (Z) from the well assembly.   8. Installation according to one of claims 5   to 7, characterized in that the screwing ramps are disoosed in such a way that, as the motor support (1) is vrssaae on the housing (2): - firstly, an external face t10 (161 ) at least one screwing ramp 16) of the motor support (1) is in contact with an external face (26-) of at least one screwing ramp (26) of the housing (2), keeping the skirt spaced apart sealing (14) and the sealing edge (24); l) - in a second step, the sealing skirt (14) slides on the sealing edge (24) without being deformed, without the screwing ramps (16o, 26) of the motor support (1) and of the case (2) are in contact; - thirdly, by bringing the internal faces (162, 26-) of the screwing ramps (16, 26) of the motor support (1) and of the housing (2) into, the sealing skirt (14) is elastically deformed   against the sealing edge (24).   9. Installation according to claim 8, characterized in that the sealing ramp (14) of the motor support (1) has ends (12a, 12b) connected by an inclined ramp (100) and in that a ramp of screwing (16) of the motor support (1) has two half-ramps (16a, 16b) arranged on either side of the inclined ramp (100) 10. Installation according to claim 9, characterized in that in said first step, the external face (161) of a first half-ramp (16b) is in contact with the external face (26j) of a screwing ramp ( 26) of the housing (2), while the second half-ramp (16a) is not in contact with a screwing ramp (26) of the housing (2). 11. Installation according to one of   claims 9 or 10, characterized in that in said   third time, the internal face (162) of the second semi-ramp (16a) is in contact with the internal face (262) of a screwing ramp (26) of the housing (2), while the first half ramp (16b) is not in contact with a screwing ramp (26) of the housing.   12. Installation according to one of the claims   previous, characterized in that the second sealing ramp (24) carried by the housing (2) has a helical evolution corresponding to the axial evolution   helical of a ferrule integrated in the housing.   13. Installation according to one of claims   previous, characterized in that it comprises a seal, in particular added, for example by overmolding, carried by the first (14) and / or the second (24) sealing ramp.