Heating, ventilation and/or air-conditioning apparatus including an air flow channel bypassing a heat exchanger

Patent metadata

Field	Value
Publication number	US-9821626-B2
Application number	US-201214118445-A
Country	US
Kind code	B2
Filing date	May 4, 2012
Priority date	May 20, 2011
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A heating, ventilation and/or air-conditioning apparatus ( 1 ) for the passenger compartment of a motor vehicle includes a housing ( 2 ) comprising a first air inlet ( 3 ) and a second air inlet ( 4 ). The housing ( 2 ) directs an inner air flow (Fi) from the first air inlet ( 3 ) and/or the second air inlet ( 4 ) and contains at least a first heat exchanger ( 5 ). The housing ( 2 ) includes: an air flow channel ( 24 ) directing the inner air flow (Fi) in the housing ( 2 ) while bypassing the first heat exchanger ( 5 ); and an air inlet duct ( 23 ) directing the inner air flow (Fi) in the housing ( 2 ) through the first heat exchanger ( 5 ). A heating, ventilation and/or air-conditioning installation for the passenger compartment of a motor vehicle includes: an air conditioning loop through which a coolant flows. The loop includes at least one compressor, a first expansion member, an outer heat exchanger and the first heat exchanger ( 5 ). The installation also includes the heating, ventilation and/or air-conditioning apparatus ( 1 ).

First claim

The invention claimed is:

1. A heating, ventilation and/or air-conditioning apparatus ( 1 ) for a passenger compartment of a motor vehicle, the heating, ventilation and/or air-conditioning apparatus ( 1 ) comprising a casing ( 2 ) including a first air inlet ( 3 ) and a second air inlet ( 4 ) and channeling an interior air flow (Fi) coming from the first air inlet ( 3 ) or the second air inlet ( 4 ), the casing ( 2 ) accommodating at least a first heat exchanger ( 5 ),
wherein the casing ( 2 ) includes:
an air circulation channel ( 24 ) channeling the interior air flow (Fi) in the casing ( 2 ) so that the interior air flow (Fi) bypasses the first heat exchanger ( 5 ), and an air inlet duct ( 23 ) channeling the interior air flow (Fi) in the casing ( 2 ) through the first heat exchanger ( 5 ), the air inlet duct ( 23 ) is delimited by an exterior wall ( 13 ) of the casing ( 2 ) and an interior wall ( 14 ) arranged in the casing ( 2 ), the interior wall ( 14 ) also defining, with the exterior wall ( 13 ) of the casing ( 2 ), the air circulation channel ( 24 ), wherein the interior wall ( 14 ) is between the first heat exchanger ( 5 ) in the air inlet duct ( 23 ) and the air circulation channel ( 24 ), the interior wall ( 14 ) extending from the first air inlet ( 3 ) toward the air inlet duct ( 23 ) and wherein interior wall ( 14 ) begins with a first straight portion at the first air inlet ( 3 ), followed by a concave-curved portion that accommodates a second air inlet flap ( 18 ), and ends with a second straight portion adjacent an end of the first heat exchanger ( 5 ).

2. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the air circulation channel ( 24 ) includes an intake ( 15 ) connected to the second air inlet ( 4 ).

3. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the air circulation channel ( 24 ) includes an intake ( 15 ) connected to the first air inlet ( 3 ).

4. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 2 , wherein the air circulation channel ( 24 ) includes the intake ( 15 ) connected to the first air inlet ( 3 ).

5. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 4 , wherein the first air inlet ( 3 ) is adapted to receive a recycled air flow (Fr) coming from the interior of the passenger compartment, and the second air inlet ( 4 ) is adapted to receive an exterior air flow (Fe) coming from the exterior of the passenger compartment.

6. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 4 , wherein the first air inlet ( 3 ) is adapted to receive an exterior air flow (Fe) coming from the exterior of the passenger compartment, and the second air inlet ( 4 ) is adapted to receive a recycled air flow (Fr) coming from the interior of the passenger compartment.

7. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the first air inlet ( 3 ) is adapted to receive a recycled air flow (Fr) coming from the interior of the passenger compartment, and the second air inlet ( 4 ) is adapted to receive an exterior air flow (Fe) coming from the exterior of the passenger compartment.

8. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the first air inlet ( 3 ) is adapted to receive an exterior air flow (Fe) coming from the exterior of the passenger compartment, and the second air inlet ( 4 ) is adapted to receive a recycled air flow (Fr) coming from the interior of the passenger compartment.

9. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the circulation of the interior air flow (Fi) in the air circulation channel ( 24 ) is controlled by a first air inlet flap ( 17 ).

10. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the circulation of the interior air flow (Fi) in the air inlet duct ( 23 ) coming from the first air inlet ( 3 ) or the second air inlet ( 4 ) is controlled by the second air inlet flap ( 18 ).

11. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the casing ( 2 ) includes the interior wall ( 14 ) installed between the air circulation channel ( 24 ) and the air inlet duct ( 23 ) in order to separate the interior air flow (Fi) into a first air flow channeled toward the air inlet duct ( 23 ) through the first heat exchanger ( 5 ) and a second air flow channeled by the air circulation channel ( 24 ) so that the interior air flow (Fi) bypasses the first heat exchanger ( 5 ).

12. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed claim 1 , wherein an additional heating device ( 19 ) is installed on the upstream side of the first heat exchanger ( 5 ) relative to the direction of flow of the interior air flow (Fi) in the casing ( 2 ).

13. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 , wherein the first heat exchanger ( 5 ) is installed on the upstream side, relative to the direction of flow of the interior air flow (Fi) in the casing ( 2 ), of an electric fan ( 8 ) adapted to move the interior air flow (Fi) in the casing ( 2 ).

14. The heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 13 , wherein the casing ( 2 ) accommodates at least a second heat exchanger ( 6 ) installed on the downstream side, relative to the direction of flow of the interior air flow (Fi) in the casing ( 2 ), of the electric fan ( 8 ).

15. A heating, ventilation and/or air-conditioning installation of a motor vehicle passenger compartment, the installation including:
an air-conditioning loop through which passes a coolant fluid and which includes at least a compressor, a first expansion unit, an exterior heat exchanger and the first heat exchanger ( 5 ), and
on the other hand, the heating, ventilation and/or air-conditioning apparatus ( 1 ) as claimed in claim 1 .

16. The heating, ventilation and/or air-conditioning installation as claimed in claim 13 of a motor vehicle passenger compartment, wherein the air-conditioning loop includes a second heat exchanger ( 6 ) installed in the casing ( 2 ) of the heating, ventilation and/or air-conditioning apparatus ( 1 ).

17. The heating, ventilation and/or air-conditioning installation as claimed in claim 12 of a motor vehicle passenger compartment, wherein the air-conditioning loop includes a second expansion unit or an internal heat exchanger adapted to provide an exchange of heat between the coolant fluid at high temperature and the coolant fluid at low temperature.

Assignees

• Wittmann Klaus
• Yahia Mohamed
• Valeo Systemes Thermiques

Inventors

• Wittmann Klaus
• Yahia Mohamed

Classifications

• B60H2001/00107

  characterised by the relative position of the heat exchangers, e.g. arrangements leading to a curved airflow · CPC title

• B60H1/0005 Primary

  the air being firstly cooled and subsequently heated or vice versa · CPC title

• B60H1/00028 Primary

  Constructional lay-out of the devices in the vehicle · CPC title

• B60H1/034

  from the cooling liquid of the propulsion plant and from an electric heating device · CPC title

• B60H1/24

  Ventilating devices where the heating or cooling is irrelevant (nozzles or air-diffusers B60H1/34) · CPC title