# US 2014/0154965 A1 · Air conditioning system

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- Number: US 2014/0154965 A1
- Document ID: US20140154965A1
- Status: Published application
- Kind: A1
- Application number: 14/068,205
- Filed: 2013-10-31
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: Hyundai Motor Company
- Applicants: Hyundai Motor Company
- Inventors: Kwangok Han; Young Chul Kim; Sunghae Park
- Web page: https://patentgrep.com/patent/US20140154965A1

## CPC

- B60H 1/248: {Air-extractors, air-evacuation from the vehicle interior}
- B60H 1/00828: {Ventilators, e.g. speed control (B60H1/00864 takes precedence)}
- B60H 1/26: Ventilating openings in vehicle exterior; Ducts for conveying ventilating air
- B60H: ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES

## Abstract

An air conditioning system that includes a casing that has a flow channel connected to an inside of a vehicle to supply or discharge air. A motor is mounted on one side of the casing to generate a normal direction torque and a reverse direction torque and a first fan is disposed on one side of the flow channel to be connected to an output shaft of the motor and to be rotated. A second fan is disposed on one side of the first fan to be fixedly mounted in the shaft and to be rotated. Additionally, a variable connecting unit that connects the first fan to the shaft of the motor is rotated when the motor is rotated in a normal direction and has a torque of the shaft of the motor not to be transmitted to the first fan when the motor is rotated in a reverse direction.

## Claims

### Claim 1

An air conditioning system, comprising:
a casing having a flow channel connected to an inside of a vehicle to supply or discharge air;
a motor mounted on one side of the casing to generate a normal direction torque and a reverse direction torque;
a first fan disposed on one side of the flow channel to be connected to a shaft that is an output shaft of the motor and to be rotated;
a second fan disposed on one side of the first fan to be fixedly mounted in the shaft and to be rotated; and
a variable connecting unit that connects the first fan to the shaft of the motor, is rotated when the motor is rotated in a normal direction, and has a torque of the shaft of the motor not to be transmitted to the first fan when the motor is rotated in a reverse direction,
wherein the first fan and the second fan have internal air flow in the normal direction when the shaft of the motor is rotated in the normal direction and the second fan discharges the internal air to the exterior when the shaft of the motor is rotated in the reverse direction.

### Claim 2 (depends on 1)

The air conditioning system of claim 1, wherein the variable connecting unit includes:
a central housing fixedly mounted in a rotation center of the first fan to rotate together with the first fan, wherein the shaft of the motor passes through a center of the central housing;
a housing protrusion formed on an internal circumference of the central housing;
a shaft protrusion formed in the shaft of the motor to correspond to the housing protrusion; and
a moving unit that pushes or pulls the central housing in an axial direction of the shaft.

### Claim 3 (depends on 2)

The air conditioning system of claim 2, wherein:
a protrusion stopper that stops a movement of the housing protrusion is formed in the shaft.

### Claim 4 (depends on 2)

The air conditioning system of claim 2, wherein the moving unit includes:
a permanent magnet formed on one side; and
an electromagnet that faces the permanent magnet and having north (N) and south (S) poles based on supplied electricity to push or pull the permanent magnet.

### Claim 5 (depends on 4)

The air conditioning system of claim 4, wherein the permanent magnet is formed at a lower end of the central housing, and the electromagnet faces the permanent magnet to be fixedly mounted in a fixing unit.

### Claim 6 (depends on 5)

The air conditioning system of claim 5, wherein a magnet stopper that stops a movement of the permanent magnet is formed in the fixing unit.

### Claim 7 (depends on 5)

The air conditioning system of claim 5, wherein the second fan is disposed at a leading end of the shaft of the motor and the first fan is disposed behind the second fan, and
wherein the permanent magnet is disposed behind the first fan, the electromagnet is disposed behind the permanent magnet, and the motor is disposed behind the electromagnet.

### Claim 8 (depends on 5)

The air conditioning system of claim 5, wherein the first fan is disposed under the second fan, the permanent magnet is disposed under the first fan, the electromagnet is disposed under the permanent magnet, and the motor is disposed under the electromagnet.

### Claim 9 (depends on 4)

The air conditioning system of claim 4, wherein the permanent magnet and the electromagnet relatively rotate with a predetermined gap while the motor is operated.

### Claim 10

A method of operating an air conditioning system, the method comprising:
determining, by a controller, whether a power supply of a battery is sufficient;
determining, by the controller, whether a starting signal is generated to determine whether an engine of a vehicle is operated;
in response to determining that the starting signal is not generated, setting, by the controller, an operation time for discharging internal air to an exterior of the vehicle using a second fan;
operating, by the controller, the motor to perform a normal rotation;
supplying, by the controller, electricity to an electromagnet to prevent a first fan from being rotated by a shaft;
setting, by the controller, a position of an intake door that connects the inside of the vehicle to the exterior to allow the internal air to be discharged to the exterior;
setting, by the controller, a torque of the motor to apply a predetermined voltage/current to the motor and to discharge contaminated air or smell in the vehicle to the exterior of the vehicle;
determining, by the controller, whether the operation time of the motor passes; and
in response to determining that the operation time of the motor has passed, operating, by the controller, a switch to set the motor be rotated in a normal direction.

### Claim 11 (depends on 10)

The method of claim 10, further comprising: operating, by the controller, the motor to perform a reverse rotation.

### Claim 12 (depends on 10)

The method of claim 10, further comprising:
ceasing, by the controller, to supply power supply to the electromagnet; and
restoring, by the controller, the torque of the motor and the intake door to a previous mode.

### Claim 13

A non-transitory computer readable medium containing program instructions executed by a processor or controller, the computer readable medium comprising:
program instructions that determine whether a power supply of a battery is sufficient;
program instructions that determine whether a starting signal is generated to determine whether an engine of a vehicle is operated;
program instructions that set an operation time for discharging internal air to an exterior of the vehicle using a second fan, in response to determining that the starting signal is not generated;
program instructions that operate the motor to perform a normal rotation;
program instructions that supply electricity to an electromagnet to prevent a first fan from being rotated by a shaft;
program instructions that set a position of an intake door that connects the inside of the vehicle to the exterior to allow the internal air to be discharged to the exterior;
program instructions that set a torque of the motor to apply a predetermined voltage/current to the motor and to discharge contaminated air or smell in the vehicle to the exterior of the vehicle;
program instructions that determine whether the operation time of the motor passes; and
program instructions that operate a switch to set the motor be rotated in a normal direction, in response to determining that the operation time of the motor has passed.

### Claim 14 (depends on 13)

The computer readable medium of claim 13, further comprising:
program instructions that operate the motor to perform a reverse rotation.

### Claim 15 (depends on 13)

The computer readable medium of claim 13, further comprising:
program instructions that cease to supply power supply to the electromagnet; and
program instructions that restore the torque of the motor and the intake door to a previous mode.