FR2720695A1 - Device for heating and / or air conditioning of the passenger compartment of a vehicle. - Google Patents

Abstract

The invention relates to a device for heating and / or air conditioning the passenger compartment of a vehicle. The device comprises an air blower (12) suitable for producing a pulsed air flow, a radiator (28) suitable for being traversed by at least part of the pulsed air flow, a ventilation flap (34) suitable for controlling a ventilation outlet (32) and another distribution flap (44) controlling two other distribution outlets (42 and 48), the aeration flap (34) being placed upstream of the radiator (28) by with respect to the circulation of the pulsed air flow, so that the aeration outlet (32) is fed directly by the pulsed air flow, while the other outlets (42 and 48) are fed by the air flow. forced air having passed through the radiator. Application in particular to vehicles of the “unibody” or “minivan” type.

Description

Heating and / or air-conditioning device for the passenger compartment

  The invention relates to a heating device and / or

  air conditioning of the passenger compartment of a vehicle.

  It relates more particularly to such a device which comprises a blower of clean air to produce a pulsed air flow, a clean radiator to be traversed by at least a portion of the pulsed air flow, a clean ventilation flap to control a ventilation outlet and at least one other distribution flap adapted to control at least one other output of

distribution.

  In a device of this type, it is usually provided, in addition to the ventilation outlet controlled by the ventilation flap, a defrost outlet feeding one or more vents defrosting or demisting the windshield and a lower output feeding one or more mouths directed towards the feet of the occupants of the vehicle and at least one

  shutter clean to control the two aforementioned outputs.

  Generally, there is only one distribution flap, also called "defrost / feet flap" which makes it possible to control

  both the defrost output and the lower output.

  In the known devices of this type, the regulation of the temperature of the pulsed air sent through the various outlets is obtained generally by mixing, in proportions

  adjustable, a cold air flow and a hot air flow.

  For this, the pulsed air flow is divided between a cold air flow circulating in a cold air transmission branch and a hot air flow circulating in an air reheater branch provided with a radiator radiator. heating, the proportion of the two flow rates being adjusted by a mixing flap. Mixed air is thus obtained, which is then directed towards the dispensing outlets to be sent into the passenger compartment. These known devices have the main disadvantage of having a large number of flaps, which increases their size, especially as the path of the air is

  globally in a quasi-linear direction.

  Moreover, the structure of these known devices is poorly adapted to current vehicles whose dashboard is very elongated in the direction of the depth due to the

strong inclination of the windshield.

  The object of the invention is in particular to overcome the disadvantages

mentioned above.

  It proposes, for this purpose, a heating and / or air conditioning device of the type defined in the introduction, in which the ventilation flap is placed upstream of the radiator with respect to the circulation of the pulsed air flow, so that the ventilation outlet is supplied directly by the pulsating air flow, while the other distribution outlet (s) are fed by the forced air flow that has passed through the radiator. A particularly compact structure apparatus is thus obtained, in particular because it is no longer necessary to provide a mixing flap for controlling the temperature of the pulsed air flow sent towards the different

exits.

  The aeration outlet is fed directly by the pulsating air flow from the blower, while the other outlet (s), i.e. usually the defrost outlet and the lower outlet, are fed by the flow of air. 'air

  pulsed having passed through the radiator.

  Advantageously, the ventilation outlet and the ventilation flap are in a position adjacent to the radiator, so that a fraction of the flow of pulsed air supplying the ventilation outlet is adapted to follow the radiator without crossing it. . This fraction of the air flow thus "licks" the radia-

  and heat up on contact depending on the temperature.

radiator.

  Thus, it is still possible to recover hot air at the outlet of the air, while the air that

  feeds this output does not go through the radiator.

  In a preferred embodiment of the invention, the blower comprises an outlet connected to an upstream duct supplying a chamber in which the radiator is housed and

  communicating with the air outlet.

  The configuration of the chamber facilitates contacting a part of the pulsed air flow with the radiator, in order to

to feed the ventilation outlet.

  Advantageously, the aforementioned chamber has a clean outlet to feed the other outlet or distribution

  by pulsating air that has passed through the radiator.

  According to a preferred configuration, this downstream output is connected to a downstream duct supplying the other distribution outlet (s). Advantageously, this downstream duct feeds a defrost outlet and a lower outlet (foot exit) and only one distribution flap is provided. to control the exit

  defrost and the lower outlet.

  According to another advantageous characteristic of the invention, the air blower, the upstream duct and the downstream duct are

arranged in a spiral.

  As a result, the general path of the pulsed air affects the general shape of a spiral, including the blower

  of air is substantially in the center.

  In such a configuration, the output of the blower is advantageously directed substantially horizontally, while the upstream duct extends upwardly from the outlet of the blower to feed the ventilation outlet, while the downstream duct 'extends downwards bypassing the

air blower.

  According to another characteristic of the invention, the radiator

  comprises means for adjusting the temperature.

  Advantageously, a radiator is used which is traversed by a hot fluid and equipped with a valve adapted to regulate the flow rate.

  hot fluid through the radiator.

  According to another characteristic of the invention, the air blower is connected at the output to an evaporator, which makes it possible to

  produce, if necessary, air conditioning.

  In the description that follows, made only as a

  for example, reference is made to the accompanying drawings, in which:

  FIG. 1 is a cross-sectional view of a device

  tif heating-air conditioning of the passenger compartment of a vehicle according to the invention in a first configuration, called "ventilation position"; and - Figures 2 to 5 are views similar to that of the

  Figure 1 for other configurations of the device.

  The device shown in Figure 1 comprises a housing 10 which, seen in cross section, affects a general shape

close to that of a circle.

  In a substantially central position of the housing is housed an air blower 12 which comprises a casing 14 in the form of a volute in which is rotatably mounted a turbine 16 about an axis 18. The turbine 16 is rotated

  by a coaxial motor (not shown).

  The casing 14 has an outlet 20 of rectangular general section in which is housed an evaporator 22 forming part of an air conditioning circuit (not shown)

of structure in itself known.

  The blower 12 can thus produce a pulsed air flow (arrow F1) which passes through the evaporator 22 to be optionally cooled before being sent inside the

housing 10.

  The outlet 20 of the blower jacket is connected to an upstream duct 24 which has substantially the shape of an arc of

  circle and that extends upwards bypassing the pul-

  12. The upstream duct 24 is formed inside and on the periphery of the casing 10, on the side facing the cockpit of the

vehicle.

  The upstream duct 24 feeds a chamber 26 in which is housed a heating radiator 28. This radiator is adapted to be traversed by a coolant, for example the

  engine engine coolant. Radiation

  28 is equipped with an adjustment valve 30 which makes it possible to modify the flow rate of the hot fluid flowing through the radiator 28

  and therefore adjust the temperature thereof.

  The chamber 26 communicates with a ventilation outlet 32 controlled by a ventilation flap 34 pivotally mounted about an axis 36. The ventilation outlet 32 is connected to vents (not shown) provided on the board on board

(not shown) of the vehicle.

  It should be noted that the ventilation outlet 32 and the ventilation flap 34 are placed in a position adjacent to the radiator 28 so that a fraction of the flow of pulsed air supplying the ventilation outlet 32 is clean along or "lick" the radiator 28 without passing through it and heating up,

  if necessary, depending on the radiator temperature.

  The chamber 26 has a downstream outlet 38, situated on the other side of the radiator 28, and consequently supplied with

  the pulsed air having passed through the radiator.

  The downstream outlet 38 is connected to a downstream duct 40 for supplying other outlets. The downstream duct 40 is directed downwards and has a curved shape so as to bypass the casing 14 of the blower, in a region opposite to that of the upstream duct 24, that is towards the front of the vehicle. The inlet of the downstream duct 40 feeds a defrost outlet 42 directed upwards and connected to mouths (not shown) used for defrosting / demisting the

  windscreen and possibly side windows of the vehicle.

  The outlet 42 is controlled by a distribution flap 44, also called "defrost / feet flap" which controls the distribution of the air flow through the outlet 42 and also through the remainder of the downstream duct 40.

  distribution 44 is rotatably mounted about an axis 46.

  The downstream duct 40 feeds a lower outlet 48, also called "foot exit", which is directed downwards and which

  opens near the outlet 20 of the blower 12.

  Output 48 is suitable for feeding mouths (not shown).

  in the lower part of the passenger compartment to send pulsating air into the region of the feet of

occupants of the vehicle.

  It will be understood that the blower 12, the upstream duct 24 and the downstream duct 40 have a configuration in the general shape of a spiral, the path of the pulsating air adopting

  accordingly the same spiral configuration.

  This spiral configuration is particularly compact and also facilitates the implantation of the device in a vehicle of the "monobody" or "monospace" type whose dashboard is very elongated in the direction of the depth, and in which the de-icing ducts and aeration are

away from each other.

  The operation of the device will now be explained.

  the invention for different configurations.

  In the configuration of Figure 1, the device is in "aeration" position in which the ventilation flap 34 is open, while the defrosting flap 44 is closed. The pulsed air sent into the duct 24 is divided into a fraction F2 which directly feeds the ventilation outlet 32 and a fraction F3 which supplies the outlet 32 after having skirted or "licked" the radiator 28, without however crossing it. The radiator 28 being more or less hot depending on the setting of the valve 30, it follows that the fraction F3 is more or less warmed by passing near the radiator. In the configuration of Figure 1, no airflow reaches

  the defrost outlet 42 and the lower outlet 48.

  In the configuration of Figure 2, to which we refer

  now the device is in the "aeration / feet" position.

  In this configuration, the ventilation flap 34 is

  green, while the defrosting flap 44 is in a position such that the defrosting outlet 42 is closed,

  while the lower output 48 is open.

  As a result, the airflow feeding the outlets

  aeration 32 may be slightly warmed (fraction F3).

  On the other hand, the flow of air F4 supplying the lower outlet 48 is heated to the passage of the radiator 28. The temperature

  this airflow can be adjusted by acting on the

net 30.

  In the configuration of Figure 3, to which we refer

  now the device is in the "feet" position.

  In this position, the ventilation outlet 32 is closed, while the defrosting flap 44 closes the exit of

  defrosting 42 and allows access to the lower outlet 48.

  As a result, the flow of air F4 from the radiator 28 is directed to the lower outlet 48. The temperature of the air thus sent to the mouths feet can be regulated by

acting on the tap 30.

  In the configuration of Figure 4, to which we refer

  now the device is in a "feet /

  In this position, the ventilation flap 34 closes the ventilation outlet 32, while the defrosting flap 44 is in an open position, so that the flow of air F4 having passed through the radiator divides in a fraction passing through the defrost outlet 42 and a fraction passing through the

lower output 48.

  Thus, air at an adjustable temperature feeds both the

  defrost outlet and the lower outlet.

  In the configuration shown in Figure 5, which is now referred to, the device is in "defrost" position. In this position, the ventilation flap 34 is in the closed position, while the defrosting flap 44 is in a position where the defrosting outlet 42 is open, while

  the access to the lower exit 48 is closed.

  Therefore, the flow of air F4 passed through the radiator 28 supplies only the defrost outlet 42 with air whose temperature can be adjusted at will using

of the tap 30.

  It will be understood that the invention is not limited to the form of

  embodiment described above as an example.

  Thus, two components can be provided to control

  the defrost output and the lower output.

  Likewise, instead of providing a radiator supplied with a hot heat transfer fluid, an electric radiator could be provided. In addition, the presence of an evaporator at the outlet of the blower

  is optional, the device is not mandatory-

  equipped with the air conditioning option.

  The device of the invention finds a particular application

  to motor vehicles of the "single-body" or "monospace" type

Claims (10)

claims   1.- Device for heating and / or air conditioning of the passenger compartment of a vehicle, comprising an air blower (12) capable of producing a pulsed air flow, a radiator (28) capable of being traversed by at least part of the forced air flow, an air vent (34) capable of controlling an air outlet (32) and at least one other distribution flap   (44) adapted to control at least one other output of distri-   bution (42,48), characterized in that the ventilation flap (34) is placed upstream of the radiator (28) with respect to the circulation of the pulsating air flow, so that the ventilation outlet (32) ) is supplied directly by the pulsating air flow, while the other distribution outlet (s) (42,48) are energized   by the flow of pulsed air having passed through the radiator (28).   2.- Device according to claim 1, characterized in that the ventilation outlet (32) and the ventilation flap (34) are in a position adjacent to the radiator (28) so that a fraction (F3) of the a forced air flow supplying the ventilation outlet (32) is adapted to follow the radiator (28) without cross it.   3.- Device according to one of claims 1 and 2,   characterized in that the air blower (12) comprises an outlet (20) connected to an upstream duct (24), which feeds a chamber (26) in which the radiator is housed and which   communicates with the vent outlet (32).   4.- Device according to claim 3, characterized in that the chamber (26) comprises a downstream outlet (38) suitable for supplying the other outlet or distribution (42,48)   by forced air (F4) having passed through the radiator (28).   5.- Device according to claim 4, characterized in that the downstream outlet (38) is connected to a downstream conduit (40)   supplying the other one or more outlets (42,48).   6.- Device according to claim 5, characterized in that the downstream duct (44) feeds a defrost outlet (42) and a lower outlet (48), and in that there is provided a single distribution flap (44) to control the defrost output (42) and the lower output (48).   7.- Device according to one of claims 5 and 6,   characterized in that the air blower (12), the upstream duct   (24) and the downstream duct (40) are arranged spirally.   8.- Device according to claim 7, characterized in that the outlet (20) of the air blower (12) is substantially horizontal, in that the upstream duct (24) extends upwards from the outlet (20) of the air blower for supplying the air outlet (32), and in that the downstream duct (40) extends downwardly bypassing the blower (12).   9.- Device according to one of claims 1 to 8, characterized   in that the radiator (28) comprises means for temperature setting (30).   10.- Device according to one of claims 1 to 9,   characterized in that the air blower (12) is connected in outlet to an evaporator (22).