Oil lubricated compressor

Patent metadata

Field	Value
Publication number	US-11111913-B2
Application number	US-201615287731-A
Country	US
Kind code	B2
Filing date	Oct 6, 2016
Priority date	Oct 7, 2015
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

An oil lubricated compressor having a universal motor, efficient starting and re-starting characteristics, and a long operating life. The oil lubricated compressor can have a brushed or brushless universal motor which can drive a cooling fan and a pump. The universal motor can achieve a high torque to voltage ratio, as well as a high torque to current ratio, upon starting or re-starting of the compressor. Optionally, the oil lubricated compressor can use a single cooling fan disposed in the compressor at a location which is between the universal motor and a cylinder head of the pump.

First claim

We claim:

1. A method for starting an oil lubricated compressor, comprising the steps of:
providing a universal motor;
configuring the universal motor to drive a flywheel and a drive belt that drives a pump assembly which is at least in part lubricated by an oil;
applying a start voltage to the universal motor in a range of 75V to 90V;
applying an inrush current of 90 amps or less to the universal motor for an inrush time of 300 ms or less; and
achieving a rotation of a rotor of the universal motor.

2. The method for starting an oil lubricated compressor according to claim 1 , wherein the universal motor is a brushed universal motor.

3. The method for starting an oil lubricated compressor according to claim 1 , wherein the universal motor is a brushed universal motor having an electrographite grade brush.

4. The method for starting an oil lubricated compressor according to claim 1 , wherein the universal motor has an operating life of 300 hrs or greater.

5. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
applying an inrush voltage of 75V or less to the universal motor.

6. The method for starting an oil lubricated compressor according to claim 1 , wherein the inrush current is 85 amps or less.

7. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
re-starting the universal motor at a voltage of 90% or less of rated voltage.

8. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
re-starting the universal motor at a voltage in a range of 75V to 90V.

9. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
starting the universal motor at an ambient temperature in a range of −9° C. to 20° C.

10. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
re-starting the universal motor at an ambient temperature in a range of −9° C. to 20° C.

11. The method for starting an oil, lubricated compressor according to claim 1 , further comprising the step of:
lubricating at least a portion of the pump assembly by an oil.

12. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan forcing a flow of, a cooling air stream to cool to both the universal motor and a cylinder head of the pump assembly.

13. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan generating a cooling air stream that flows across at least a portion of a cylinder head of the pump assembly and across at least a portion of the universal motor.

14. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan disposed between the universal motor and a cylinder head of the pump assembly.

15. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan disposed between the universal motor and a cylinder head of the pump assembly; and
generating a cooling air stream by said fan that flows across at least a portion of the cylinder head prior to flowing across at least a portion of the universal motor.

16. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan disposed between the universal motor and a cylinder head of the pump assembly, and
generating a cooling air stream by said fan that flows across at least a portion of the universal motor prior to flowing across at least a portion of the cylinder head.

17. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan,
wherein the universal motor is configured between the fan and a cylinder head of the pump assembly.

18. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan generating a cooling air stream,
wherein the universal motor is configured between the fan and a cylinder head of the pump assembly; and
wherein the cooling air stream flows across at least a portion of a cylinder head of the pump assembly prior to flowing across at least a portion of the universal motor.

19. The method for starting an oil lubricated compressor according to claim 1 , further comprising the step of:
providing a fan generating a cooling air stream,
wherein the universal motor is configured between the fan and a cylinder head of the pump assembly; and
wherein the cooling air stream flows across at least a portion of the universal motor prior to flowing across at least a portion of a cylinder head of the pump assembly.

Assignees

• Black & Decker Inc

Inventors

• Vos Stephen J
• Hathcock Lance S
• Vintzel James
• Mcfarland Dalton E

Classifications

• F04B39/0276

  the pump being of the reciprocating piston type, e.g. oscillating, free-piston compressors · CPC title

• F04B39/066

  Cooling by ventilation · CPC title

• F04B2203/0202

  Voltage · CPC title

• H02K7/1004

  with pulleys · CPC title

• H02K13/10

  Arrangements of brushes or commutators specially adapted for improving commutation · CPC title