Fluid connection module with advanced fluid switching unit
Embodiments are disclosed of a fluid connection module. The module includes a holder coupled to a connector having an axis, and the holder is translatable in both directions of the axis so that the holder and the connector can translate between an engaged and disengaged positions. The holder is biased toward the disengaged position. A switching unit adjacent to the holder includes an electric motor. A blade is coupled to the electric motor and is rotatable through a range of angular positions. The blade has a contact surface that contacts a bearing surface of the holder in a first subrange of angular positions and stops contacting the bearing surface in a second subrange of angular positions. When the contact surface is in contact with the bearing surface, the holder is in its engaged position. An elastic torque member is coupled to the motor and the blade and biases the blade to an angular position in the second subrange.
1. An apparatus comprising:
a holder coupled to a connector having an axis; and
a switching unit adjacent to the holder, the switching unit comprising:
an electric motor,
a blade coupled to the electric motor and rotatable by the electric motor through a range of angular positions, the blade including a contact surface that contacts a bearing surface of the holder in a first subrange of the range of angular positions and stops contacting the bearing surface in a second subrange of the range of angular positions, wherein when the contact surface is in contact with the bearing surface, the holder is forced into its engaged position, and
an elastic torque member coupled to the electric motor and to the blade, wherein the elastic torque member biases the blade to an angular position in the second subrange of the range of angular positions.
2. The apparatus of claim 1 wherein the holder is translatable in both directions of the axis so that the holder and the connector can translate between an engaged position and a disengaged position, and wherein the holder is biased toward the disengaged position, and wherein the holder is biased toward the disengaged position by an elastic member.
3. The apparatus of claim 2 wherein the elastic member comprises one or more linear springs.
4. The apparatus of claim 1 wherein the blade is a sector-shaped blade comprising:
a curved contact surface;
a first radial edge extending from one end of the curved contact surface to a blade apex; and
a second radial edge extending from another end of the curved contact surface to the blade apex, wherein the first radial edge and the second radial edge form a blade angle at the apex, the blade angle being the angle between the first radial edge and the second radial edge.
5. The apparatus of claim 4 wherein the electric motor is coupled to the blade at or near the blade apex.
6. The apparatus of claim 4 wherein a size of the first subrange and a size of the second subrange depend on the blade angle.
7. The apparatus of claim 1 wherein:
when the electric motor is supplied with electrical power, the electric motor rotates the blade to an angular position in the first subrange; and
when the electric motor is not supplied with electrical power, the elastic torque member rotates the blade to an angular position in the second subrange.
8. The apparatus of claim 1 , further comprising:
a power source coupled to the electric motor, the power source including a switch to enable or disable power delivery by the power source; and
a leak-detection sensor coupled to the switch, wherein upon detection of a leak the leak-detection sensor opens the switch, disabling power delivery by the power source.
9. A system comprising:
a supply holder coupled to a fluid supply connector having an axis;
a return holder coupled to a fluid return connector having an axis;
a switching unit adjacent to the supply holder and the return holder, the switching unit comprising:
an electric motor,
a supply blade coupled to the electric motor and rotatable by the electric motor through a range of angular positions, the supply blade including a contact surface that contacts a bearing surface of the supply holder in a first subrange of the range of angular positions and stops contacting the bearing surface of the supply holder in a second subrange of the range of angular positions, wherein when the contact surface of the supply blade is in contact with the bearing surface of the supply holder, the supply holder is forced into its engaged position,
a return blade coupled to the electric motor and rotatable by the electric motor through the range of angular positions, the return blade including a contact surface that contacts a bearing surface of the return holder in a third subrange of the range of angular positions and stops contacting the bearing surface of the return holder in a fourth subrange of the range of angular positions, wherein when the contact surface of the return blade is in contact with the bearing surface of the return holder, the return holder is forced into its engaged position,
an elastic torque member coupled to the electric motor, the supply blade, and the return blade, wherein the elastic torque member biases the supply blade to an angular position in the second subrange of the range of angular positions and biases the return blade to an angular position in the fourth subrange of the range of angular positions.
10. The system of claim 9 wherein:
the supply holder is translatable in both directions of the axis so that the supply holder and the supply connector can translate between an engaged position and a disengaged position, and wherein the supply holder is biased toward the disengaged position, and
the return holder is translatable in both directions of the axis so that the return holder and the return connector can translate between an engaged position and a disengaged position, and wherein the return holder is biased toward the disengaged position.
11. The system of claim 10 wherein the supply holder and the return holder are biased toward their disengaged positions by elastic members, and wherein the elastic members comprise one or more linear springs.
12. The system of claim 11 wherein the first subrange is different than the third subrange of the range of angular positions.
13. The system of claim 12 wherein the first subrange is a subset of the third subrange.
14. The system of claim 12 wherein the first subrange overlaps with the third subrange.
15. The system of claim 9 wherein the supply blade and the return blades are sector-shaped blades comprising:
a curved contact surface;
a first radial edge extending from one end of the curved contact surface to a blade apex; and
a second radial edge extending from another end of the curved contact surface to the blade apex, wherein the first radial edge and the second radial edge form a blade angle at the apex, the blade angle being the angle between the first radial edge and the second radial edge.
16. The system of claim 15 wherein the electric motor is coupled to the blade at or near the blade apex.
17. The system of claim 15 wherein the blade angle of the return blade is greater than the blade angle of the supply blade.
18. The system of claim 17 wherein a size of the first subrange and a size of the third subrange depend on the blade angle.
19. The system of claim 9 wherein:
when the electric motor is supplied with electrical power, the electric motor rotates the supply blade to an angular position in the first subrange and rotates the return blade to an angular position in the third subrange; and
when the electric motor is not supplied with electrical power, the elastic torque member rotates the supply blade to an angular position in the second subrange and rotates the return blade to an angular position in the fourth subrange.
20. The system of claim 9 , further comprising:
a power source coupled to the electric motor, the power source including a switch to enable or disable power delivery to the electric motor by the power source; and
a leak-detection sensor coupled to the switch, wherein upon detection of a leak the leak-detection sensor opens the switch, disabling power delivery to the electric motor by the power source.