Patent ID: 11920589
Assignee: DANFOSS COMMERCIAL COMPRESSORS
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  H | IPC F  H

Claim 19:
20. A method for electrically connecting a terminal block assembly of a scroll compressor to external power leads of an external power source, the scroll compressor including a hermetic casing, a compression unit arranged within the hermetic casing and including a first scroll and a second scroll, an electric motor arranged within the hermetic casing and configured to drive the second scroll relative to the first scroll, an electrical box attached to an outer surface of the hermetic casing, and compressor power terminals insulated from the hermetic casing and electrically connected to the electric motor, the compressor power terminals protruding in the electrical box, the electrical box containing a control module which is configured to control the electric motor, control wires which are connected to the control module, and a terminal block assembly configured to electrically connect the compressor power terminals and the control wires to external power leads of an external power source, wherein the terminal block assembly comprises a body part and a wire guiding part which is configured to guide and position the control wires in predetermined connection positions with respect to the body part,
wherein each of the control wires comprises an elongated main wire part and an eyelet crimped to an end portion of the respective elongated main wire part, the wire guiding part which being configured to position the eyelets of the control wires in the predetermined connection positions,
wherein each compressor power terminal comprises an aperture which is facing the eyelet of a respective control wire,
wherein the terminal block assembly comprises metal inserts secured to the body part and each having a central bore provided with a treaded inner surface, the terminal block assembly further including metal connection studs each having a treaded outer surface and each being mounted and secured in the central bore of a respective metal insert,
wherein the terminal block assembly includes locking nuts each secured to a respective metal connection stud, each locking nut being configured to secure an electrical connection between a respective compressor power terminal, a respective control wire and a respective external power lead,, the method comprising the following steps:
inserting external power leads of the external power source into the electrical box,
temporarily removing the locking nuts,
positioning connection lugs of the external power leads onto the metal connection studs,
re-attaching the locking nuts to the metal connection studs in order to secure connection of eyelets of the control wires, the compressor power terminals and the connection lugs of the external power leads.