GB2096357A - An improved vehicle heating and ventilation unit - Google Patents

An improved vehicle heating and ventilation unit Download PDF

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Publication number
GB2096357A
GB2096357A GB8203875A GB8203875A GB2096357A GB 2096357 A GB2096357 A GB 2096357A GB 8203875 A GB8203875 A GB 8203875A GB 8203875 A GB8203875 A GB 8203875A GB 2096357 A GB2096357 A GB 2096357A
Authority
GB
United Kingdom
Prior art keywords
electric motor
ventilation unit
vehicle heating
nominal value
hall generator
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Withdrawn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
GB8203875A
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of GB2096357A publication Critical patent/GB2096357A/en
Withdrawn legal-status Critical Current

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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
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00978—Control systems or circuits characterised by failure of detection or safety means; Diagnostic methods
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1472—Control of position or direction using feedback using an analogue comparing device with potentiometer

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Air-Flow Control Members (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

A vehicle heating and ventilation unit. The air flap (3) of a vehicle heating and ventilation unit (1) is adjusted by means of an electric motor (11) which may be actuated by a nominal value potentiometer in a retroactive feed- back control circuit. In order to prevent malfunctions caused by wear even after a large number of movements and a long service life of the air flap (3), the control circuit contains a position feedback element, operating without contacts, and comprising a Hall generator 14 cooperating with a metal strip 15 provided on the worm-wheel 9. <IMAGE>

Description

SPECIFICATION An improved vehicle heating and ventilation unit The invention relates to a vehicle heating and ventilation unit having an air flap which is adjusted by means of an electric motor acted upon by a nominal value setter.
In a known unit, (the journal "Krafthand" Vol.
2, 26th January 1980, p.4) a potentiometer is associated with an electromotive flap setting unit.
This construction is disadvantageous in that wear is produced on the slider and on the resistance path of the potentiometer as a result of frequent air flap movements and may lead to malfunctioning of the electromotively actuated air flap.
The object of the invention is to provide a heating and ventilation unit in which the air flap is arranged in such a way that no malfunctions resulting from wear arise even after a large number of movements and a long service life.
The present invention consists in a vehicle heating and ventilation unit having an air flap which is adjusted by means of an electric motor acted upon by a nominal value setter, wherein the electrical/electronic circuit between the nominal value setter and the electric motor comprises a control element which operates without contacts The main advantages provided by the invention consist in that wear phenomena on the electrical/electronic system are avoided by the control element operating without contacts.
The Hall generator is suitable in this respect as it is simple and reliable in operation.
The combination of the Hall generator of the motor and the worm wheel to form a structural unit enables the latter to be efficiently produced and simply mounted.
In the accompanying drawings:- Figure 1 is a cross-section through an air duct of a heating and ventilation unit provided with the air flap of the invention.
Figure 2 is a circuit diagram.
A heating and ventilation unit 1 comprises an air duct 2 with a pivotable flap 3. The flap 3 is fixedly connected to a pivotable shaft 4 which is mounted at 5 and 6 in the air duct 2. The shaft 4 is connected to a drive shaft 8 via a rib and slot connection 7, the connecting shaft 8 supporting a worm wheel 9 which cooperates with and is driven by a drive worm 10 operatively connected to an electric motor 11.
The connection shaft 8, the worm wheel 9 and the electric motor 11 are combined in a housing 1 2 to form a structural unit. The housing 12 is provided at 1 3 with a Hall generator 14 which cooperates with a metal strip 1 5 provided on the worm wheel 9. The housing 1 2 is connected to the air duct 2 via suitable connection means 16, 17.
As shown in Fig. 2 the electric motor 11 is connected on one hand to the output 1 8 of a differential amplifier 1 9 and, on the other hand, with a first input terminal 20 of the differential amplifier via the Hall generator 14. A second input terminal 21 of the differential amplifier 1 9 is connected to a nominal value potentiometer 22.
If the nominal value potentiometer 22 is manually or automatically adjusted (hot or cold air or amount of air), a positive or negative signal is produced at the output 1 8 of the differential amplifier 1 9, as a result of which the electric motor 11 rotates and the position of the air flap 3 is adjusted. The electric motor then ceases to operate when the output signal at the Hall generator 14 corresponds to the predetermined nominal value.
Claims
1. A vehicle heating and ventilation unit having an air flap which is adjusted by means of an electric motor acted upon by a nominal value setter, wherein the electrical/electronic circuit between the nominal value setter and the electric motor comprises a control element which operates without contacts.
2. A vehicle heating and ventilation unit as claimed in claim 1 , wherein the control element is formed by a Hall generator.
3. A vehicle heating and ventilation unit as claimed in claim 2, wherein the Hall generator is provided on a fixed portion of a housing and a metal strip cooperating with the Hall generator is provided on a rotatable element actuated by the electric motor.
4. A vehicle heating and ventilation unit as claimed in claim 3, wherein the rotatable element is formed as a worm wheel and cooperates via a connection shaft with a pivotable shaft having the air flap fixedly mounted thereon and the worm wheel is driven by a drive worm operatively connected to the electric motor.
5. A vehicle heating and ventilation unit as claimed in claim 4, wherein the worm wheel forms a structural unit with the connection shaft, the electric motor and the Hall generator and is disposed in the housing.
6. A vehicle heating and ventilation unit substantially as described with reference to, and as illustrated in, the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION An improved vehicle heating and ventilation unit The invention relates to a vehicle heating and ventilation unit having an air flap which is adjusted by means of an electric motor acted upon by a nominal value setter. In a known unit, (the journal "Krafthand" Vol. 2, 26th January 1980, p.4) a potentiometer is associated with an electromotive flap setting unit. This construction is disadvantageous in that wear is produced on the slider and on the resistance path of the potentiometer as a result of frequent air flap movements and may lead to malfunctioning of the electromotively actuated air flap. The object of the invention is to provide a heating and ventilation unit in which the air flap is arranged in such a way that no malfunctions resulting from wear arise even after a large number of movements and a long service life. The present invention consists in a vehicle heating and ventilation unit having an air flap which is adjusted by means of an electric motor acted upon by a nominal value setter, wherein the electrical/electronic circuit between the nominal value setter and the electric motor comprises a control element which operates without contacts The main advantages provided by the invention consist in that wear phenomena on the electrical/electronic system are avoided by the control element operating without contacts. The Hall generator is suitable in this respect as it is simple and reliable in operation. The combination of the Hall generator of the motor and the worm wheel to form a structural unit enables the latter to be efficiently produced and simply mounted. In the accompanying drawings:- Figure 1 is a cross-section through an air duct of a heating and ventilation unit provided with the air flap of the invention. Figure 2 is a circuit diagram. A heating and ventilation unit 1 comprises an air duct 2 with a pivotable flap 3. The flap 3 is fixedly connected to a pivotable shaft 4 which is mounted at 5 and 6 in the air duct 2. The shaft 4 is connected to a drive shaft 8 via a rib and slot connection 7, the connecting shaft 8 supporting a worm wheel 9 which cooperates with and is driven by a drive worm 10 operatively connected to an electric motor 11. The connection shaft 8, the worm wheel 9 and the electric motor 11 are combined in a housing 1 2 to form a structural unit. The housing 12 is provided at 1 3 with a Hall generator 14 which cooperates with a metal strip 1 5 provided on the worm wheel 9. The housing 1 2 is connected to the air duct 2 via suitable connection means 16, 17. As shown in Fig. 2 the electric motor 11 is connected on one hand to the output 1 8 of a differential amplifier 1 9 and, on the other hand, with a first input terminal 20 of the differential amplifier via the Hall generator 14. A second input terminal 21 of the differential amplifier 1 9 is connected to a nominal value potentiometer 22. If the nominal value potentiometer 22 is manually or automatically adjusted (hot or cold air or amount of air), a positive or negative signal is produced at the output 1 8 of the differential amplifier 1 9, as a result of which the electric motor 11 rotates and the position of the air flap 3 is adjusted. The electric motor then ceases to operate when the output signal at the Hall generator 14 corresponds to the predetermined nominal value. Claims
1. A vehicle heating and ventilation unit having an air flap which is adjusted by means of an electric motor acted upon by a nominal value setter, wherein the electrical/electronic circuit between the nominal value setter and the electric motor comprises a control element which operates without contacts.
2. A vehicle heating and ventilation unit as claimed in claim 1 , wherein the control element is formed by a Hall generator.
3. A vehicle heating and ventilation unit as claimed in claim 2, wherein the Hall generator is provided on a fixed portion of a housing and a metal strip cooperating with the Hall generator is provided on a rotatable element actuated by the electric motor.
4. A vehicle heating and ventilation unit as claimed in claim 3, wherein the rotatable element is formed as a worm wheel and cooperates via a connection shaft with a pivotable shaft having the air flap fixedly mounted thereon and the worm wheel is driven by a drive worm operatively connected to the electric motor.
5. A vehicle heating and ventilation unit as claimed in claim 4, wherein the worm wheel forms a structural unit with the connection shaft, the electric motor and the Hall generator and is disposed in the housing.
6. A vehicle heating and ventilation unit substantially as described with reference to, and as illustrated in, the accompanying drawings.
GB8203875A 1981-03-20 1982-02-10 An improved vehicle heating and ventilation unit Withdrawn GB2096357A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813110949 DE3110949A1 (en) 1981-03-20 1981-03-20 "AIR VALVE FOR HEATING AND VENTILATION SYSTEMS OF VEHICLES"

Publications (1)

Publication Number Publication Date
GB2096357A true GB2096357A (en) 1982-10-13

Family

ID=6127834

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8203875A Withdrawn GB2096357A (en) 1981-03-20 1982-02-10 An improved vehicle heating and ventilation unit

Country Status (4)

Country Link
DE (1) DE3110949A1 (en)
FR (1) FR2502074A1 (en)
GB (1) GB2096357A (en)
IT (1) IT1150457B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485863A (en) * 1980-12-12 1984-12-04 Mitsubishi Jukogyo Kabushiki Kaisha Control device for car-mounted air-conditioner
EP1226988A3 (en) * 2001-01-25 2003-09-03 Valeo Klimasysteme GmbH Shaft bearing
CN100363195C (en) * 2001-11-22 2008-01-23 韦巴斯托股份公司 Vehicle heating device and method for assembling a vehicle heating device

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3305725A1 (en) * 1983-02-18 1984-08-23 Bayerische Motoren Werke AG, 8000 München DRIVE DEVICE FOR A FLAP IN MOTOR VEHICLES
JPH0170609U (en) * 1987-10-30 1989-05-11
DE3935593A1 (en) * 1989-10-26 1991-05-02 Hella Kg Hueck & Co METHOD AND DEVICE FOR REGULATING THE INTERIOR TEMPERATURE OF MOTOR VEHICLES
DE3935592A1 (en) * 1989-10-26 1991-05-02 Hella Kg Hueck & Co METHOD AND DEVICE FOR REGULATING THE INTERIOR TEMPERATURE OF MOTOR VEHICLES
DE4343385A1 (en) * 1993-12-18 1995-06-22 Behr Gmbh & Co Actuator for an air flow flap
DE19816013B4 (en) * 1998-04-09 2007-11-08 Volkswagen Ag Air flow distributor for a motor vehicle interior
KR102429009B1 (en) 2017-08-09 2022-08-03 현대자동차 주식회사 Heat pump system for vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51135030A (en) * 1975-05-19 1976-11-22 Hitachi Ltd Temperature control device for an air-conditioner of a car
FR2368747A1 (en) * 1976-10-22 1978-05-19 Sev Marchal Electrical control system for automobile air conditioning - compares actual and set conditions to produce voltages controlling movable element and electric motor speed
DE2808661A1 (en) * 1978-03-01 1979-09-06 Bosch Gmbh Robert Temp. control for car heater - has thermal expansion element geared to setting device for mixing flap
FR2442153A1 (en) * 1978-11-24 1980-06-20 Ouest Cie Regulator for air flow into motor vehicle cabin - utilises air inlet valves electronically controlled from temp. probe
JPS56102449A (en) * 1979-12-31 1981-08-15 Fanuc Ltd Device for controlling orientation of main spindle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4485863A (en) * 1980-12-12 1984-12-04 Mitsubishi Jukogyo Kabushiki Kaisha Control device for car-mounted air-conditioner
EP1226988A3 (en) * 2001-01-25 2003-09-03 Valeo Klimasysteme GmbH Shaft bearing
CN100363195C (en) * 2001-11-22 2008-01-23 韦巴斯托股份公司 Vehicle heating device and method for assembling a vehicle heating device

Also Published As

Publication number Publication date
DE3110949A1 (en) 1982-09-30
IT8219717A0 (en) 1982-02-18
DE3110949C2 (en) 1989-11-02
FR2502074A1 (en) 1982-09-24
FR2502074B1 (en) 1985-03-15
IT1150457B (en) 1986-12-10

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Legal Events

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