WO2023043817A1 - Système cvc comprenant un ensemble d'entrée d'air - Google Patents

Système cvc comprenant un ensemble d'entrée d'air Download PDF

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Publication number
WO2023043817A1
WO2023043817A1 PCT/US2022/043497 US2022043497W WO2023043817A1 WO 2023043817 A1 WO2023043817 A1 WO 2023043817A1 US 2022043497 W US2022043497 W US 2022043497W WO 2023043817 A1 WO2023043817 A1 WO 2023043817A1
Authority
WO
WIPO (PCT)
Prior art keywords
inlet
fresh
recirculation
hvac system
recited
Prior art date
Application number
PCT/US2022/043497
Other languages
English (en)
Inventor
Joseph J. Spryshak
Original Assignee
Air International (Us) Inc.
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 Air International (Us) Inc. filed Critical Air International (Us) Inc.
Publication of WO2023043817A1 publication Critical patent/WO2023043817A1/fr

Links

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
    • B60H1/00457—Ventilation unit, e.g. combined with a radiator
    • B60H1/00471—The ventilator being of the radial type, i.e. with radial expulsion of the air
    • 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
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00835—Damper doors, e.g. position control
    • B60H1/00849—Damper doors, e.g. position control for selectively commanding the induction of outside or inside air
    • 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
    • B60H2001/00078—Assembling, manufacturing or layout details
    • B60H2001/00085—Assembling, manufacturing or layout details of air intake

Definitions

  • Vehicles may have a HVAC (Heating, ventilation, and air conditioning) climate control system located within an instrument panel which provides conditioned air, such as by heating or cooling or dehumidifying, through various outlets to occupants in the vehicle cabin.
  • HVAC Heating, ventilation, and air conditioning
  • An HVAC system includes a blower assembly.
  • An inlet assembly is fluidly upstream of the blower assembly and includes a first duct housing section and a second duct housing section.
  • the first duct housing section includes a fresh inlet for receiving air from a fresh air source and a recirculation inlet for receiving air from a recirculated air source and a cylinder extending toward the blower assembly.
  • the second duct housing section includes a second fresh inlet for receiving air from the fresh air source and a second recirculation inlet for receiving air from the recirculated air source, and the cylinder is received within the second duct housing section.
  • the first duct housing section provides a first flowpath from the fresh inlet and recirculation inlet to the blower assembly.
  • the second duct housing section provides a second flowpath from the second fresh inlet and the second recirculation inlet to the blower assembly, and the first flowpath is fluidly separate from the second flowpath.
  • a filter is fluidly downstream of the blower assembly.
  • a butterfly door is at each of the fresh inlet, recirculation inlet, second fresh inlet, and second recirculation inlet.
  • the blower assembly includes a blower wheel having an inlet edge, and a downstream edge of the cylinder is within 20 mm of a plane lying on the inlet edge.
  • the filter is configured to receive fluid from each of the fresh inlet, recirculation inlet, second fresh inlet, and second recirculation inlet.
  • the recirculation inlet is positioned directly above the second recirculation inlet.
  • an inlet face of the recirculation inlet and an inlet face of the second recirculation inlet lie in a first plane.
  • the fresh inlet and the second fresh inlet are positioned directly side by side.
  • an inlet face of the fresh inlet, and an inlet face of the second fresh inlet lie in a second plane.
  • the first plane is transverse to the second plane.
  • the second fresh inlet is nearer the blower assembly than the first fresh inlet.
  • the first fresh inlet face has a first upper edge and the second fresh inlet face has a second upper edge.
  • the recirculation inlet face has a third upper edge
  • the second recirculation face has a fourth upper edge
  • the first and second upper edges are each positioned at a height between a height of the third upper edge and a height of the fourth upper edge.
  • the fresh inlet face has a first lower edge and the second fresh inlet face has a second lower edge.
  • the recirculation inlet face has a third lower edge, and the second recirculation face has a fourth lower edge, and the first and second lower edges are each positioned at a height between a height of the third lower edge and a height of the fourth lower edge.
  • first and second upper edges are positioned at the same height as one another, and the first and second lower edges are positioned at the same height as one another.
  • third upper edge is at a height above the cylinder, and the third lower edge is at a height below the cylinder.
  • the fourth upper edge and the fourth lower edge are each at a height below the cylinder.
  • the fourth lower edge is below the blower, and the second duct assembly includes a sloped surface sloping from the second recirculation inlet up to the blower assembly.
  • the system is positionable to an all fresh mode in which the fresh inlet and second fresh inlet are open, and the recirculation inlet and second recirculation inlet are closed.
  • the system is positionable to an all recirculation mode in which the fresh inlet and second fresh inlet are closed, and the recirculation inlet and second recirculation inlet are open.
  • the system includes ram air control such that the fresh inlet and, optionally, the second fresh inlet are positionable to partially open positions.
  • the first flowpath includes an area within an inner diameter of the cylinder
  • the second flowpath includes an area radially outward of an outer surface of the cylinder.
  • Figure 1 schematically illustrates a vehicle with an example HVAC system.
  • Figure 2 illustrates the example HVAC system of Figure 1.
  • Figure 3 illustrates a sectional view of an example inlet and blower assembly of the example HVAC system of Figures 1 and 2.
  • Figure 4 illustrates a cross sectional view of the example cylinder and blower assembly of Figure 3.
  • Figure 5 illustrates another view of the example inlet and blower assembly of Figures 3-4.
  • Figure 6 illustrates a sectional view of the example inlet and blower assembly of Figures 3-5.
  • Figure 7 illustrates another sectional view of the example inlet and blower assembly of Figures 3-6.
  • Figure 8 schematically illustrates flow through the example blower assembly.
  • This disclosure relates generally to HVAC systems for vehicles, and particularly to systems and methods for configuration of air inlets to HVAC systems.
  • FIG. 1 schematically illustrates a vehicle 10 including an example HVAC system 20 for providing conditioned air to a vehicle cabin 12.
  • the vehicle 10 may include any of automobiles, heavy trucks, agricultural vehicles, or commercial vehicles.
  • FIG 2 illustrates the example HVAC system 20 of Figure 1 including an air inlet assembly 22, a blower assembly 24 for receiving fluid from, and fluidly downstream of, the air inlet assembly 22, a filter 26 downstream of the blower assembly 24, and an HVAC module 28, which may include an evaporator and heater core 29, among other things.
  • the blower assembly 24 draws in air from the inlet assembly 22.
  • the filter 26 filters dust and any other particulate matter before the flow enters the HVAC module 28.
  • the example air inlet assembly 22 includes a first duct housing section 30 including a recirculation inlet 32 and a fresh inlet 34.
  • the example air inlet assembly 22 further includes a fluidly separate, second duct housing section 36 including a recirculation inlet 38 and a fresh inlet 40.
  • the second duct housing section 36 may be a separate housing received against the first duct housing section 30, or, the first duct housing section 30 and second duct housing section 36 may include one outer housing with internal divider walls for fluid separation.
  • Figure 2 which is the normal orientation of the system 20 when utilized in a vehicle, the inlet 32 is above the inlet 38, and the inlets 34 and 40 are side-by-side.
  • the filter 26 is positioned to receive air flowing from each of the recirculation inlet 32, fresh inlet 34, recirculation inlet 38, and a fresh inlet 40.
  • the first duct housing section 30 and the second duct housing section 36 are fluidly separate in that they provide fluidly separate flowpaths from the inlets 32, 34, separated from the inlets 38, 40 to the blower assembly 24.
  • the recirculation inlets 32, 38 are for receiving recirculated air from inside the vehicle.
  • the fresh inlets 34, 40 are for receiving air from outside the vehicle.
  • Figure 3 illustrates a sectional view of the example air inlet assembly 22 and blower assembly 24 of Figure 2.
  • a butterfly door 42 is provided at each of the recirculation inlets 32, 38 and fresh inlets 34, 40.
  • each door rotates about 90 degrees about its axis between an opened and closed position.
  • Other door or valve types may be utilized in some examples.
  • the example doors 42 can move independently of one another to achieve various modes discussed below.
  • the example first duct housing section 30 includes a cylinder 44 (the bottom half being shown in Figure 3) that extends from a cavity 45 downstream of the inlets 32, 34. That is, both inlets 32, 34 feed air into the cavity 45 and then the cylinder 44.
  • the cylinder 44 is received within the second duct housing section 36 and extends toward a housing 46 of the blower assembly 24, which contains a blower wheel 47.
  • air enters the fresh inlets 34, 40 at an angle substantially perpendicular ( ⁇ 20 degrees) to the angle of the airflow through the blower assembly 24.
  • the first duct housing section 30 provides a first flowpath from the fresh inlet 34 and recirculation inlet 32 to the blower assembly 24.
  • the second duct housing section 36 provides a second flowpath from the second fresh inlet 40 and the second recirculation inlet 38 to the blower assembly 24, and the first flowpath is fluidly separate from the second flowpath.
  • the first flowpath includes the area within the inner diameter surface of the cylinder 44
  • the second flowpath includes the area radially outward of the outer diameter surface of the cylinder 44.
  • the upper half of the cylinder 44 (removed in this cross section) encloses a portion of the first flowpath.
  • the example second duct housing section 36 includes a circular outlet 49 aligned with the blower wheel 47, where air is drawn out of the second duct housing section 36 and into the blower wheel 47.
  • the example cylinder 44 is concentric with, and extends through, the outlet 49.
  • a portion of the cylinder 44 is within the blower wheel 47, extending beyond a plane P in which an inlet edge of the blower wheel 47 lies, such that a downstream edge of the cylinder 44 is within the blower wheel 47.
  • a portion of the cylinder 44 is within the housing 46. the example configurations disclosed route air directly to the blower wheel 47 and minimize leakage to other paths.
  • the cylinder 44 prevents the air from bypassing the blower wheel 47 and flowing directly into the vehicle cabin.
  • Figure 5 illustrates the example inlet assembly 22 and blower assembly 24.
  • the recirculation inlet 32 is positioned directly above the recirculation inlet 38.
  • the inlet face 50 of the recirculation inlet 32 and the inlet face 52 of the recirculation inlet 38 lie in the same plane.
  • the fresh inlet 34 and the fresh inlet 40 are positioned directly side by side and may be separated by one or more walls 53.
  • the inlet face 54 of the fresh inlet 34, and the inlet face 56 of the second fresh inlet lie in the same plane, transverse to the plane of the inlet face 50 and the inlet face 52.
  • the fresh inlet 40 is nearer the blower assembly 24 than the fresh inlet 34.
  • the fresh inlet face 54 has a first upper edge 58
  • the second fresh inlet face 56 has a second upper edge 60
  • the recirculation inlet face 50 has an upper edge 62
  • the recirculation inlet face 52 has an upper edge 64.
  • the upper edges 58, 60 are each positioned at a height between a height of the upper edge 62 and a height of the upper edge 64.
  • the fresh inlet face 54 has a first lower edge 66
  • the second fresh inlet face 56 has a second lower edge 68
  • the recirculation inlet face 50 has a lower edge 70
  • the second recirculation face 52 has a lower edge 72.
  • the lower edges 66, 68 are each positioned at a height between a height of the lower edge 70 and a height of the lower edge 72.
  • the edges 64, 70 may be provided by one or more walls.
  • the upper edges 58, 60 are positioned at the same height as one another, and the lower edges 66, 68 are positioned at the same height as one another.
  • Figure 6 illustrates another sectional view of the example inlet assembly 22 and blower assembly 24.
  • the upper edge 62 is at a height above the cylinder 44
  • the lower edge 70 is at a height below the cylinder 44.
  • the upper edge 64 and the lower edge 72 are each at a height below the cylinder 44.
  • the lower edge 72 is below the blower assembly 24, and the second duct housing section 36 includes a sloped surface 74 sloping from the recirculation inlet 38 up to the blower assembly 24.
  • Figure 7 illustrates another view of the sloped surface 74.
  • the system 20 includes three modes, an all fresh mode, in which all air received into the blower assembly 24 is fresh air from outside the vehicle; an all recirculated mode, in which all air received into the blower assembly 24 is recirculated air from inside the vehicle; and a mixed mode, in which about 50% of the air received into the blower assembly 24 is fresh air from outside the vehicle, and about 50% of the air received into the blower assembly 24 is recirculated air from inside the vehicle.
  • the mixed mode one door 42 from each of the duct housing sections 30 and 36 is open and a door from that respective duct housing section 30 and 36 is closed (See Figure 3).
  • one of the doors from inlets 32, 38 is open and the other is closed, and one of the doors from inlets 34 and 40 is open and the other is closed.
  • the doors 42 of the inlets 34, 40 include ram air control to account for the changing pressures of the air associated with the changing vehicle speed.
  • the open door 42 of the inlets 34, 40 may be moved to a more closed position as vehicle speed increases.
  • the sequencing of the door opening may include the following airflow and specific door positions:
  • Fresh Inlet 34 OPEN b.
  • Recirculation Inlet 32 CLOSED c.
  • Second Fresh Inlet 40 OPEN d.
  • Fresh Inlet 34 OPEN
  • Recirculation Inlet 32 CLOSED
  • Second Fresh Inlet 40 CLOSED
  • Second Recirculation Inlet 38 OPEN
  • Fresh Inlet 34 OPEN or PARTIALLY OPEN b.
  • Recirculation Inlet 32 CLOSED c.
  • Second Fresh Inlet 40 OPEN or PARTIALLY OPEN d.
  • Second Recirculation Inlet 38 CLOSED
  • Fresh Inlet 34 OPEN or PARTIALLY OPEN b.
  • Recirculation Inlet 32 CLOSED c.
  • Second Fresh Inlet 40 CLOSED d.
  • Second Recirculation Inlet 38 OPEN
  • FIG 8 schematically illustrates the flow into and through the blower assembly 24 in an example mixed mode.
  • fresh air enters the blower assembly 24 from inside the cylinder 44
  • recirculated air enters the blower assembly 24 from the area of the second duct housing section 36 radially outward of the cylinder 44.
  • the cross-sectional area inside the cylinder is equal to the cross-sectional area of the second duct housing section 36 outside the cylinder to aid in providing a 50/50 split of fresh and recirculated air in the mixed mode.
  • mixed air exits the blower assembly 24 and flows through the filter 26.
  • recirculated air enters the blower assembly 24 from inside the cylinder 44, and fresh air enters the blower assembly 24 from the area of the second duct housing section 36 radially outward of the cylinder 44.
  • other modes including all fresh and all recirculation, may be achieved.
  • the systems 20 disclosed allow for an efficient HVAC system capable of a mixed fresh and recirculation mode while achieving the benefits of having a filter downstream of the blower, i.e., better temperature stratification at the evaporator air-off side, better airflow uniformity at the evaporator, and elimination of the need for separate filters for fresh and recirculated air.
  • the design further allows for a larger filter than prior art systems, which allows more airflow, longer filter change interval, and reduces electrical power needed to achieve desired airflow.
  • the systems 20 further achieve efficiency by ensuring that outside air passes through the blower and does not flow directly into the vehicle cabin as in some prior art systems.
  • the systems 20 further increase efficiency by allowing for direct airflows with minimal packaging space required.

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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 CVC comprenant un ensemble soufflante. Un ensemble d'entrée est en amont, dans le sens fluidique, de l'ensemble soufflante et comprend une première section de logement de conduit et une seconde section de logement de conduit. La première section de logement de conduit comprend une entrée fraîche pour recevoir de l'air provenant d'une source d'air frais et une entrée de recirculation pour recevoir de l'air provenant d'une source d'air recirculé et un cylindre, qui s'étend vers l'ensemble soufflante. La seconde section de logement de conduit comprend une seconde entrée fraîche pour recevoir de l'air provenant de la source d'air frais et une seconde entrée de recirculation pour recevoir de l'air provenant de la source d'air recirculé, et le cylindre est reçu à l'intérieur de la seconde section de logement de conduit. Un filtre est en aval, dans le sens fluidique, de l'ensemble soufflante.
PCT/US2022/043497 2021-09-14 2022-09-14 Système cvc comprenant un ensemble d'entrée d'air WO2023043817A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163243997P 2021-09-14 2021-09-14
US63/243,997 2021-09-14

Publications (1)

Publication Number Publication Date
WO2023043817A1 true WO2023043817A1 (fr) 2023-03-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478274A (en) * 1993-06-23 1995-12-26 Valeo Thermique Habitacle Heating and ventilating, and/or air conditioning, apparatus for the cabin of a motor vehicle, especially an electric vehicle
DE19963796A1 (de) * 1998-12-30 2000-07-06 Valeo Climatisation Heiz-, Belüftungs- und/oder Klimaanlage mit einem Ansauggebläse
EP3447300A1 (fr) * 2017-08-25 2019-02-27 Valeo Japan Co., Ltd. Unité de soufflante centrifuge pour conditionneur d'air de véhicule
JP2019127248A (ja) * 2018-01-27 2019-08-01 マツダ株式会社 車両用空調装置
EP3530955A1 (fr) * 2016-10-18 2019-08-28 Valeo Japan Co., Ltd. Soufflante centrifuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5478274A (en) * 1993-06-23 1995-12-26 Valeo Thermique Habitacle Heating and ventilating, and/or air conditioning, apparatus for the cabin of a motor vehicle, especially an electric vehicle
DE19963796A1 (de) * 1998-12-30 2000-07-06 Valeo Climatisation Heiz-, Belüftungs- und/oder Klimaanlage mit einem Ansauggebläse
EP3530955A1 (fr) * 2016-10-18 2019-08-28 Valeo Japan Co., Ltd. Soufflante centrifuge
EP3447300A1 (fr) * 2017-08-25 2019-02-27 Valeo Japan Co., Ltd. Unité de soufflante centrifuge pour conditionneur d'air de véhicule
JP2019127248A (ja) * 2018-01-27 2019-08-01 マツダ株式会社 車両用空調装置

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