Expansion valve
AssigneeMahle International GmbH
InventorsChristoph P. Moser, Werner Schadler, Mario Wetzl
Life of this patent
Estimating the term…
Abstract
An expansion valve for at least one of an air conditioning system, a battery cooler, and an oil cooler of a motor vehicle is disclosed. The expansion valve includes a housing, a sensor, a stepping motor or a brushless DC (BLDC) motor, a valve seat, and a valve body interacting with the valve seat. The stepping motor or the BLDC motor includes a rotor and a stator surrounding the rotor. The rotor includes a shaft and a permanent magnet body that is connected to the shaft in a rotationally fixed manner. The sensor is structured and arranged to detect at least one of an axial position and an angle of rotation of the permanent magnet body.
Claims19
An expansion valve for at least one of an air conditioning system, a battery cooler or an oil cooler of a motor vehicle, comprising:
- a housing, a sensor, a stepping motor or a brushless DC (BLDC) motor, a valve seat, and a valve body interacting with the valve seat,
- the stepping motor or the BLDC motor including a rotor and a stator surrounding the rotor,
- the rotor including a shaft and a permanent magnet body that is connected to the shaft in a rotationally fixed manner,
- wherein the sensor is structured and arranged to detect an axial position of the permanent magnet body and/or an angle of rotation of the permanent magnet body;
- wherein the permanent magnet body has a pot-shaped structure including a signal generator region and a rotor region, the signal generator region extending radially inwards from the rotor region;
- wherein the shaft is directly connected to the signal generator region of the permanent magnet body via a positive connection and/or a bonded connection;
- and
- wherein the sensor is arranged at a control board, and/or a split pot is provided, which surrounds the rotor and separates a rotor-side wet region from a stator-side dry region.
An expansion valve for at least one of an air conditioning system, a battery cooler or an oil cooler of a motor vehicle, comprising:
- a housing, a sensor, a stepping motor or a brushless DC (BLDC) motor, a valve seat, and a valve body interacting with the valve seat,
- the stepping motor or the BLDC motor including a rotor and a stator surrounding the rotor,
- the rotor including a shaft and a permanent magnet body that is connected to the shaft in a rotationally fixed manner,
- wherein the sensor is structured and arranged to detect an axial position of the permanent magnet body and/or an angle of rotation of the permanent magnet body;
- wherein the permanent magnet body has a pot-shaped structure including a signal generator region and a rotor region, the signal generator region extending radially inwards from the rotor region;
- wherein the shaft is directly connected to the signal generator region of the permanent magnet body via a positive connection and/or a bonded connection;
- wherein the shaft and the valve body are at least partially arranged within a valve body guide;
- and
- wherein the shaft has an external thread and the valve body guide has a corresponding internal thread, or vice versa, so that, in response to a rotation of the shaft, an axial adjustment of the shaft takes place together with the permanent magnet body, and the valve body is pushed onto the valve seat or is lifted off from the valve seat.
An expansion valve for at least one of an air conditioning system, a battery cooler or an oil cooler of a motor vehicle, comprising:
- a housing, a sensor, a stepping motor or a brushless DC (BLDC) motor, a valve seat, and a valve body interacting with the valve seat,
- the stepping motor or the BLDC motor including a rotor and a stator surrounding the rotor,
- the rotor including a shaft and a permanent magnet body that is connected to the shaft in a rotationally fixed manner,
- wherein the sensor is structured and arranged to detect an axial position of the permanent magnet body and/or an angle of rotation of the permanent magnet body;
- wherein the permanent magnet body has a pot-shaped structure including a signal generator region and a rotor region, the signal generator region extending radially inwards from the rotor region;
- wherein the shaft is directly connected to the signal generator region of the permanent magnet body via a positive connection and/or a bonded connection;
- and
- wherein the shaft has an external thread and the valve body guide has a corresponding internal thread, or vice versa, so that, in response to a rotation of the shaft, an axial adjustment of the shaft takes place independently of the permanent magnet body, and the valve body is pushed onto the valve seat or is lifted off from the valve seat.
Dependencies are inferred from the claim text.