GB2123947A - Ventilation ducts for motor vehicles - Google Patents

Ventilation ducts for motor vehicles Download PDF

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Publication number
GB2123947A
GB2123947A GB08218502A GB8218502A GB2123947A GB 2123947 A GB2123947 A GB 2123947A GB 08218502 A GB08218502 A GB 08218502A GB 8218502 A GB8218502 A GB 8218502A GB 2123947 A GB2123947 A GB 2123947A
Authority
GB
United Kingdom
Prior art keywords
bellows
duct
vacuum
valve
ventilation duct
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB08218502A
Inventor
Harold Eric William Foster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BRITISH LEYLAND CARS Ltd
Rover Co Ltd
Original Assignee
BRITISH LEYLAND CARS Ltd
Rover Co Ltd
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 BRITISH LEYLAND CARS Ltd, Rover Co Ltd filed Critical BRITISH LEYLAND CARS Ltd
Priority to GB08218502A priority Critical patent/GB2123947A/en
Publication of GB2123947A publication Critical patent/GB2123947A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
    • F16K7/10—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with inflatable member
    • 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
    • B60H1/00421—Driving arrangements for parts of a vehicle air-conditioning
    • B60H1/00435—Driving arrangements for parts of a vehicle air-conditioning fluid or pneumatic
    • B60H1/00442—Driving arrangements for parts of a vehicle air-conditioning fluid or pneumatic using a vacuum
    • 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
    • B60H1/00692—Damper doors moved by translation, e.g. curtain doors

Abstract

A collapsible bellows 2 within a fresh air ventilation duct for a motor vehicle is connected by way of a valve (not shown) to the manifold depression, and this lifts a head 9 of the bellows clear of a seating 8 against the action of a coil spring 7 into position 6 against guides 5. If it is desired to shut off the duct, the valve in the vacuum line is vented to atmospheric pressure and the bellows springs against the shoulder 8. The valve can be operated by a lever which also operates to divert air for demisting. <IMAGE>

Description

SPECIFICATION Improvements relating to ventilation ducts for motor vehicles This invention relates to ventilation ducts for motor vehicles, and especially to means for controlling the airflow through such ducts.
The ventilation ducts, which may be for heated air, fresh air, or cooled air (in the case of airconditioning), are usually controlled by manual controls such as thumbwheels or sliders. These usually operate to close off the ducts in a gradual manner, and to vary the direction of air emerging from them.
It is however known for such ducts to be opened and closed by means of servo-mechanisms. For example, it has been proposed to employ a vacuum actuatorto close off a ventilation duct: the vacuum actuator is selectively connected to a vacuum which moves a control rod which in turn acts on a linkage which operates a bufferfly valve in the duct. The vacuum actuatorworks by the vacuum sucking a piston into a cylinder against the action of a spring.
When the vacuum line is vented, the piston springs forward, the control rod being rigidly connected to the piston. A rubber diaphragm permits the piston to move relative to the cylinder. A disadvantage with this known arrangement is that it is costly and bulky.
The present invention provides a ventilation duct for a vehicle, which includes a vacuum actuator in the duct, a part of the vacuum actuator being movable between two positions depending on whether vacuum is applied, and the vacuum actuator blocking the duct in one of those positions.
The arrangement according to the invention is less costly then the known servo-mechanism referred to above in that the butterfly valve and linkage have been omitted and, since the actuator is located inside instead of outside the duct, the arrangement is less bulky.
Advantageously, the vacuum actuator comprises a bellows having an opening for a vacuum connection and a spring for urging the bellows into an expanded state. The servo-mechanism is controlled by means of a valve in the vacuum pipe (which may conveniently use the vacuum generated in the inlet manifold). When the valve connects the bellows to the vacuum, it will collapse against the action ofthe spring. When the valve connects the bellows to atmospheric pressure, the spring urges the bellows into the expanded state.
Preferaby, the bellows has an enlarged head which engages a circular seat in the duct to block the duct. Conveniently, the duct can be closed when the bellows is in its normal state and open when the bellows are collapsed.
A ventilation duct constructed in accordance with the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an axial cross-section of the duct; and Figure 2 is a plan view of the assembly of Figure 1 but with the part 3 removed.
The Figures show a fresh-air duct for a motor car fascia. Two such ducts are provided on each side of the fascia to provide fresh air for the driver and the passenger. In accordance with the invention, both these ducts can be simultaneously shut off by operation of a valve (not shown) in a vacuum line 1 leading to the vehicle inlet manifold. An advantage of this is the system lends itself well to providing easy demisting. If demisting is required, all the heating air should be directed over the windscreen (and sidewindows as well if these are also to be demisted). Since the fresh air ducts are generally connected to the air heater (and in any case fresh air into the vehicle makes demisting more difficult), these should also be shut off.Thus, one lever can operate the main heating outlet to close it off and channel the heating air to the windscreen, and this same lever can operate the valve in the vacuum line to simultaneously shut the fresh air vents. The vehicle driver is thus saved from having to reach over to shut off the vent adjacent the passenger and on the driver's side.
Referring to the drawings, the duct has a bellows 2 of thermoplastic rubber material in a two part plastics casing 3, 4. Part 3 defines the inlet and part 4 the outlet. A coil spring 7 urges the bellows 2 into a position where it blocks the outlet in that it seats on seating 8 at the mouth of the outlet. The spring acts between the rear of the enlarged head 9 which is formed at one end of the bellows and a spider 10 of plastics material which is sandwiched between the two parts 3,4 of the casing. The spider 10 has a shoulder 11 to retain the spring against lateral movement and the rear of the head a groove 9a for the same reason. The periphery of the spider 10 and the parts 3,4 can be heat welded together.
The bellows is formed with a spigot 12 at the end remote from its head (Figure 2) and this facilitates assembly. The spider 10 has a slot 13 cut in it, through which the spigot can pass. The parts are assembled as follows. The spring 7 is placed over the spigot end of the bellows so that it rests on the rear of the head 9. The spider 10 is then slipped over the same end of the bellows 2. The spring is then compressed and the spigot aligned with the slot and led through it. When the spigot has passed through the slot, it is given half a turn so that it is at 90 to the axis of the slot. Adhesive or other means is used to hold the parts together. This may be done while the bellows is located in the outlet part 4 of the casing.
The bellows is made in one piece, that it, including the head 9 and spigot 12, from thermoplastic rubber material, for example, by blow moulding. The bellows terminates in a stub pipe 14 (also formed integrally with the rest of the bellows) to which the vacuum line is connected.
When the valve (not shown) in the vacuum line is connected to the manifold depression, the bellows is collapsed and the head is sucked clear of the seating 8 into position 6 against guides 5 pressed from spider 10. The fresh air duct is thus in its normal working state. When it is desired to block off the vent completely, the valve is operated to vent the vacuum line to atmospheric pressure, and the bellows springs into an expanded state where it blocks the duct. As stated hereinbefore, this can advantageous ly be coupled into a demist control system.
The invention has been described in relation to a vacuum actuator in one piece of thermoplastic rubber material, but the invention is also applicable to the known kind of actuator wherein a piston moves in a cylinder with a rubber diaphragm forming the seal member.

Claims (5)

1. A ventilation duct for a motor vehicle, which includes a vacuum actuator in the duct, a part of the vacuum actuator being movable between two positions depending on whether a vacuum is applied, and the vacuum actuator blocking the duct in one of those positions.
2. A ventilation duct as claimed in claim 1, wherein the vacuum actuator comprises a bellows having an opening for a vacuum connection and a spring for urging the bellows into an expanded state.
3. A ventilation duct as claimed in claim 2, wherein the bellows has an enlarged head which engages a circular seat in the duct to block the duct.
4. A venitlation duct as claimed in claim 2 or claim 3, wherein the bellows is made of thermoplastic rubber material.
5. A ventilation duct substantially as hereinbefore described with reference to, and as shown in, the accompanying drawing.
GB08218502A 1982-06-25 1982-06-25 Ventilation ducts for motor vehicles Withdrawn GB2123947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08218502A GB2123947A (en) 1982-06-25 1982-06-25 Ventilation ducts for motor vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08218502A GB2123947A (en) 1982-06-25 1982-06-25 Ventilation ducts for motor vehicles

Publications (1)

Publication Number Publication Date
GB2123947A true GB2123947A (en) 1984-02-08

Family

ID=10531291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08218502A Withdrawn GB2123947A (en) 1982-06-25 1982-06-25 Ventilation ducts for motor vehicles

Country Status (1)

Country Link
GB (1) GB2123947A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156067A (en) * 1984-03-21 1985-10-02 Austin Rover Group A closable air vent
WO1987002120A1 (en) * 1985-09-27 1987-04-09 Halton Oy Constant air flow rate valve, and procedure for controlling a constant air flow rate valve
WO1994006644A1 (en) * 1992-09-17 1994-03-31 Peterson Francis C Pressure actuated door
EP0684172A1 (en) * 1994-05-26 1995-11-29 Gec Alsthom Transport Sa Shut-off device for a distributing duct, and installation comprising such a device
FR2723713A1 (en) * 1994-08-17 1996-02-23 Faiveley Transport CLUTCH FITTING MEMBER OF AN AIR CIRCUIT FOR RAILWAY VEHICLES
US5626516A (en) * 1993-09-17 1997-05-06 Phillips Plastics Corporation Pressure actuated door
EP1685992A1 (en) * 2005-02-01 2006-08-02 Delphi Technologies, Inc. Air flow control valve for vehicle air conditioning module
WO2016050731A1 (en) * 2014-09-29 2016-04-07 Enquiring Eye GmbH System for introducing fragrances into the interior of a vehicle
US20160243921A1 (en) * 2015-02-19 2016-08-25 Ford Global Technologies, Llc Vehicle ventilation system incorporating an inlet duct including a poppet valve
CN110816214A (en) * 2019-11-27 2020-02-21 安徽江淮汽车集团股份有限公司 Air conditioner control panel crumple structure, vehicle-mounted air conditioner and automobile

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB921958A (en) * 1958-07-09 1963-03-27 Connor Eng Corp Pneumatic damper
GB1208765A (en) * 1967-03-01 1970-10-14 Carrier Corp Air distribution unit
GB1232964A (en) * 1969-01-09 1971-05-26
GB1433521A (en) * 1972-03-01 1976-04-28 Marlo Spa Induction air conditioning apparatus
GB2010470A (en) * 1977-12-07 1979-06-27 Carrier Corp System powered damper blade assembly for use in an air conditioning system
GB1565102A (en) * 1976-07-12 1980-04-16 Ferodo Sa Ventilation device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB921958A (en) * 1958-07-09 1963-03-27 Connor Eng Corp Pneumatic damper
GB1208765A (en) * 1967-03-01 1970-10-14 Carrier Corp Air distribution unit
GB1232964A (en) * 1969-01-09 1971-05-26
GB1433521A (en) * 1972-03-01 1976-04-28 Marlo Spa Induction air conditioning apparatus
GB1565102A (en) * 1976-07-12 1980-04-16 Ferodo Sa Ventilation device
GB2010470A (en) * 1977-12-07 1979-06-27 Carrier Corp System powered damper blade assembly for use in an air conditioning system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156067A (en) * 1984-03-21 1985-10-02 Austin Rover Group A closable air vent
WO1987002120A1 (en) * 1985-09-27 1987-04-09 Halton Oy Constant air flow rate valve, and procedure for controlling a constant air flow rate valve
US4827971A (en) * 1985-09-27 1989-05-09 Halton Oy Constant air flow rate valve, and procedure for controlling a constant air flow rate valve
WO1994006644A1 (en) * 1992-09-17 1994-03-31 Peterson Francis C Pressure actuated door
US5626516A (en) * 1993-09-17 1997-05-06 Phillips Plastics Corporation Pressure actuated door
US5575453A (en) * 1994-05-26 1996-11-19 Gec Alsthom Transport Sa Vehicle sidewall air distribution duct with inflatable gasket
FR2720338A1 (en) * 1994-05-26 1995-12-01 Gec Alsthom Transport Sa Device for closing a distribution sheath and installation comprising such a device.
EP0684172A1 (en) * 1994-05-26 1995-11-29 Gec Alsthom Transport Sa Shut-off device for a distributing duct, and installation comprising such a device
FR2723713A1 (en) * 1994-08-17 1996-02-23 Faiveley Transport CLUTCH FITTING MEMBER OF AN AIR CIRCUIT FOR RAILWAY VEHICLES
EP0704363A1 (en) * 1994-08-17 1996-04-03 Faiveley Transport Valve device of an air duct for a railway vehicle
EP1685992A1 (en) * 2005-02-01 2006-08-02 Delphi Technologies, Inc. Air flow control valve for vehicle air conditioning module
US7174918B2 (en) 2005-02-01 2007-02-13 Delphi Technologies, Inc. Air flow control valve for vehicle air conditioning module
WO2016050731A1 (en) * 2014-09-29 2016-04-07 Enquiring Eye GmbH System for introducing fragrances into the interior of a vehicle
US20160243921A1 (en) * 2015-02-19 2016-08-25 Ford Global Technologies, Llc Vehicle ventilation system incorporating an inlet duct including a poppet valve
RU2707857C2 (en) * 2015-02-19 2019-11-29 ФОРД ГЛОУБАЛ ТЕКНОЛОДЖИЗ, ЭлЭлСи Vehicle ventilation system, motor vehicle and air flow control method
US10828960B2 (en) * 2015-02-19 2020-11-10 Ford Global Technologies, Llc Vehicle ventilation system incorporating an inlet duct including a poppet valve
CN110816214A (en) * 2019-11-27 2020-02-21 安徽江淮汽车集团股份有限公司 Air conditioner control panel crumple structure, vehicle-mounted air conditioner and automobile

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)