WO2008062427A2 - Système de chauffage/ventilation/conditionnement d'air (hvac) pourvu d'un ensemble intégré volet de pied-conduit-chicanes, destiné à des véhicules - Google Patents

Système de chauffage/ventilation/conditionnement d'air (hvac) pourvu d'un ensemble intégré volet de pied-conduit-chicanes, destiné à des véhicules Download PDF

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Publication number
WO2008062427A2
WO2008062427A2 PCT/IN2007/000332 IN2007000332W WO2008062427A2 WO 2008062427 A2 WO2008062427 A2 WO 2008062427A2 IN 2007000332 W IN2007000332 W IN 2007000332W WO 2008062427 A2 WO2008062427 A2 WO 2008062427A2
Authority
WO
WIPO (PCT)
Prior art keywords
duct
foot
baffles
mixing chamber
air
Prior art date
Application number
PCT/IN2007/000332
Other languages
English (en)
Other versions
WO2008062427A3 (fr
Inventor
Sahebrao Pawar Prasant
Original Assignee
Behr India Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Behr India Limited filed Critical Behr India Limited
Publication of WO2008062427A2 publication Critical patent/WO2008062427A2/fr
Publication of WO2008062427A3 publication Critical patent/WO2008062427A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00007—Combined heating, ventilating, or cooling devices
    • B60H1/00021—Air flow details of HVAC devices
    • B60H1/00064—Air flow details of HVAC devices for sending air streams of different temperatures into the passenger compartment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00664—Construction or arrangement of damper doors
    • B60H2001/00721—Air deflecting or air directing means

Definitions

  • HEATING/VENTILATION/AIR CONDITIONING (HVAC) SYSTEM HAVING FOOT FLAP INTEGRATED WITH DUCT AND BAFFLES FOR USE IN VEHICLES
  • HVAC Heating/Ventilation/Air conditioning
  • the invention relates more particularly to a HVAC system which is a module used in an automobile to take care of conditioning the air supplied to the car cabin. It controls heating, cooling and humidity inside the car cabin.
  • Major components of the HVAC system are: ducts, blower, blower motor, evaporator, heater, condenser, compressor, piping, expansion valve, plastic housings to hold heat exchangers, baffles and flaps.
  • the plastic housings and flaps play an important role in proper distribution of air at different outlets. A high level of comfort is being increasingly demanded by automobile users, creating thereby more challenges for the designers of HVAC systems.
  • the present invention relates more specifically to a HVAC system for heating and air conditioning of motor vehicles, in which the customer specifications for Air-Flow distribution in different modes of operation of the system and also Thermal Balance in the bi-level modes of operation of the system have been met by using a FOOT FLAP which is structurally integrated with a duct and baffles to form a single unit for controlling the flow of a part of hot air directly into the system.
  • Different modes of air flow in operating the invented HVAC system are: a) Face mode, b) Foot mode, c) Defrost mode, d) Face-Foot mode, e) Defrost-Foot mode.
  • the last two modes i.e. mode d) and mode e) are called bi-level modes.
  • the present invention lies mainly in the structural integration of the Foot Flap with a duct and baffles to form a single unit.
  • the foot flap is one of the different flaps used in the HVAC system, and serves the primary functions of controlling the flow of hot air entering into the Foot outlet and also acts as ⁇ duct and baffles' to guide flow of hot air directly into the mixing chamber of the system.
  • duct and baffles are used as three separate components each functioning independently of one another. The customer specifications for distribution of airflow and comfort could not, however, be met by using the foot flap, duct and baffles functioning independently as separate components.
  • HVAC system The structural integration of the foot flap with a duct and baffles has also resulted in saving of manufacturing cost of the integrated unit of foot flap, duct and baffles because a single mould can be used for producing the same, instead of using three separate moulds for producing the said three components separately.
  • HVAC Systems and devices for motor vehicles using different means of controlling the proportion of Hot and Cold air supplied into the mixing chambers for ventilation and defrost outlet ducts are known in the prior art.
  • Patent No. FR2765526 discloses a heating and/or air conditioning system, particularly for motor vehicles, in which fresh air from outside is fed into a mixing chamber for Hot and Cold air, partly directly and partly through a heating chamber, in proportion which is controlled by a specially designed and constructed mixing flap.
  • Patent No. FR2788019 discloses a device for heating and/or air conditioning the passenger compartment of a motor vehicle, in which the proportion of Hot and Cold air fed into a mixing chamber is varied by using two specially designed and constructed drum-shaped flaps which are pivoted co-axially and provided each with at least one integrated channel for allowing passage of Hot and Cold air into the mixing chamber of the device.
  • Patent application No. WO 2005 000 610 discloses a ventilation device, especially for a heating or air conditioning system of a motor vehicle, in which two specially designed flaps are provided in a housing for controlling the flow of ventilation air into different areas of the passenger compartment of a motor vehicle through a number of outlet ducts.
  • the above mentioned prior arts are not relevant to the present invention which relates to a HVAC system for use in motor vehicles, containing a Foot Flap which is structurally integrated with a duct and baffles for controlling and guiding the flow of a part of the hot air supplied directly into the main mixing chamber of the systems and is of relatively simple design and hence of low-cost construction, and found to be suitable for meeting the customer specifications of Air-Flow distribution in different modes of operation of the system, and thermal balancing in Bi-Level mode of operations of the system.
  • the object of the present invention is to provide a HVAC system for use in motor vehicles, which meets the customer specifications for air flow distribution and thermal balancing, and is of relatively simple design and hence low cost construction.
  • the HVAC system for use in motor vehicles comprises mainly a cold air supply zone, a hot air supply zone, primary mixing chamber for cold and hot air, a main mixing chamber for cold and hot air, a defrost outlet, a foot outlet and a foot flap which is structurally integrated with a duct and baffles for controlling the flow of a part of hot air directly into the main mixing chamber.
  • the duct and baffles integrated with the foot flap prevent a part of the hot air supplied there through from being mixed with the cold air supplied through the primary mixing chamber, and allow the said part of the hot air to enter directly into the main mixing chamber.
  • the integrated unit comprising the foot flap, a duct and baffles is mounted rotatably in the primary mixing chamber.
  • the flap of this integrated unit When the flap of this integrated unit is close, it prevents hot air from entering into the foot outlet. As the flap starts opening, it allows air to flow from the primary mixing chamber into the foot outlet and at the same time the duct and baffles of the integrated unit guide a part of the hot air to flow from the hot air zone directly into the main mixing chamber of the system. In this way the integrated unit permits achieving the Air Flow Distribution and Thermal Balance to meet customer specifications by operating the HVAC system in different modes as stated hereinbefore.
  • HVAC heating/ventilation/air conditioning
  • Figure- 1 illustrates the disposition of different zones, chambers, outlet ducts and foot flap integrated with a duct and baffles and also air-flow directions from cold air zone and hot air zone into the primary and main mixing chambers, and defrost and foot outlets of the invented HVAC system;
  • Figure- 2 illustrates the Foot Flap integrated with a duct and baffles, pivotably mounted in different positions in the HVAC system;
  • Figure- 3 illustrates the flow of Hot air and Cold air first into the primary mixing chamber and then into the main mixing chamber, and the flow of a part of the hot air through the foot flap integrated with a duct and baffles directly into the main mixing chamber as well as into the foot outlet;
  • the invented HVAC system comprises a cold air supply zone (CZ), a hot air supply zone (HZ), a primary mixing chamber (PMC), a main mixing chamber (MMC), a defrost outlet (DO), a foot outlet (FO), a heater (HT), an evaporator (EV), a foot flag (FF), integrated with a duct (DT) and baffles (BF) and rotatably mounted in pivots (PV).
  • CZ cold air supply zone
  • HZ hot air supply zone
  • PMC primary mixing chamber
  • MMC main mixing chamber
  • DO defrost outlet
  • FO foot outlet
  • HT heater
  • EV evaporator
  • FF foot flag
  • DT duct
  • BF baffles
  • Cold air from zone (CZ) is allowed to flow via evaporator (EV) and chamber (PMC) into chamber (MMC).
  • Hot air produced in zone (HZ) by heater (HT) is also allowed to flow mainly via chamber (PMC) into chamber (MMC), and only partly, as collected by baffles (BF), via duct (DT) directly into chamber (MMC) or into defrost outlet (DO) or into foot outlet (FO) depending on the degree of opening of foot flap (FF), through rotation in pivots (PV) according to different modes of operation of the system.
  • BF baffles
  • DT duct
  • DO defrost outlet
  • FO foot outlet
  • FIG. 2A the foot flap (FF) is depicted before the integration thereof with a duct and baffles.
  • foot flap which is structurally integrated with duct (DT) along a line of attachment (IL) and also with baffles (BF), is shown rotatably mounted in pivots (PV) for performing the following functions:
  • HZ To collect a part of the hot air flowing from zone,(HZ) with baffles (BF) and direct it into main mixing chamber (MMC) via duct (DT), without being mixed with cold air in the primary mixing chamber (PMC), and to achieve thereby the desired thermal balance in different modes of operation of the HVAC system.
  • MMC main mixing chamber
  • DT duct
  • PMC primary mixing chamber
  • Duct is made of drum shape, substantially square cross section and bent configuration in the vertical plane.
  • Foot flap is made of substantially rectangular shape and bent configuration along the length thereof so that the curvature thereof is the same as that of the corner edge of the duct which is attached to the longitudinal edge of the foot flap.
  • Baffles are each made of sheets of substantially semi-circular shape, the straight edge of which is joined to the inner surface of a side of the duct, so as to block about 30 to 40 % of the duct operature.
  • the integrated unit of foot flap (FF), duct (DT) and baffles (BF), designed to be a single unit, is made preferably of plastics which can be moulded in a single mould.
  • PMC primary mixing chamber
  • HZ hot air from zone
  • MMC main mixing chamber
  • FIGs. 4,5,6 and 7 the test results of thermal balance obtained by using the invented HVAC system in motor vehicles in the bi-level mode of operation thereof i.e. Foot-Defrost mode and Foot-Ventilation mode, show that difference in temperature of air flow at the foot and Defrost levels (Figs 4 and 6) varies from -I 0 C to +6 0 C in the area covering upto 50% of mixing flap opening position, and from +5 0 C to + H 0 C in the remaining area; and at the Foot and Ventilation levels (Figs 5 and 7) varies from -2.5 0 C to +15 0 C in the area covering upto 30% of mixing flap opening, from +5 0 C to + 15 0 C in the area covering from 30% to 70% opening of mixing flap and from -2.5° C to +15 0 C in the remaining area of mixing flap opening.
  • the advantages attained by using the invented HVAC system containing the Integrated Foot Flap are - 1) Requirement of Air flow distribution in different modes of operation of the HVAC system and Temperature stratification in bi- level modes of its operation have been met by using the Foot Flap integrated with a duct and baffles and functioning as a single unit. 2)
  • the integrated unit of Foot flap, duct and baffles is of relatively simple design and low-cost construction from manufacturing point of view, does not require incorporation of any specially designed and relatively expensive components in the system to meet the customer specifications for air-flow distribution and thermal balance.
  • the integrated unit of foot flap, duct and baffles can be produced using a single mould with the resultant saving in cost required for moulding the three components i.e.foot flap, duct and baffles in three separate moulds.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

L'invention concerne un système de HVAC pour des véhicules à moteur, permettant de satisfaire à des spécifications de client en termes de distribution de courant d'air et d'équilibre thermique et comprenant une zone d'alimentation en air froid (CZ), une zone d'alimentation en air chaud (HZ), une chambre de mélange primaire (PMC), une chambre de mélange principale (MMC) pour mélanger l'air chaud et l'air froid, et un ensemble intégré composé d'un volet de pied (FF), d'un conduit (DT) et de chicanes (BF) pour contrôler l'air entrant dans la sortie de pied (FO), lorsque le HVAC n'est pas en mode pied et également l'air entrant dans la chambre de mélange principale (MMC) lorsque le HVAC est dans un mode quelconque autre que le mode pied. L'ensemble intégré composé d'un volet de pied, d'un conduit et de chicanes fonctionne en tant qu'unité unique et permet à une partie de l'air chaud provenant de la zone chaude (HZ) d'entrer directement dans la chambre de mélange principale (MMC) sans être en contact avec l'air froid provenant de la zone froide (CZ). Les chicanes (BF) collectent une partie de l'air chaud provenant de la zone chaude (HZ) et le guident jusqu'au conduit (DT).
PCT/IN2007/000332 2006-08-07 2007-08-06 Système de chauffage/ventilation/conditionnement d'air (hvac) pourvu d'un ensemble intégré volet de pied-conduit-chicanes, destiné à des véhicules WO2008062427A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1248MU2006 2006-08-07
IN1248/MUM/2006 2006-08-07

Publications (2)

Publication Number Publication Date
WO2008062427A2 true WO2008062427A2 (fr) 2008-05-29
WO2008062427A3 WO2008062427A3 (fr) 2008-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2007/000332 WO2008062427A2 (fr) 2006-08-07 2007-08-06 Système de chauffage/ventilation/conditionnement d'air (hvac) pourvu d'un ensemble intégré volet de pied-conduit-chicanes, destiné à des véhicules

Country Status (1)

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WO (1) WO2008062427A2 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786134A1 (fr) * 1998-11-19 2000-05-26 Valeo Climatisation Dispositif de chauffage-ventilation de l'habitacle d'un vehicule
EP1514707A1 (fr) * 2003-09-12 2005-03-16 Valeo Climatisation Gestion aérothermique perfectionnée dans un dispositif de chauffage et/ou climatisation d' habitacle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786134A1 (fr) * 1998-11-19 2000-05-26 Valeo Climatisation Dispositif de chauffage-ventilation de l'habitacle d'un vehicule
EP1514707A1 (fr) * 2003-09-12 2005-03-16 Valeo Climatisation Gestion aérothermique perfectionnée dans un dispositif de chauffage et/ou climatisation d' habitacle

Also Published As

Publication number Publication date
WO2008062427A3 (fr) 2008-07-31

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