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

Claim 18:
19. A method for electrically connecting a terminal block assembly of a scroll compressor to compressor power terminals, 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,
wherein the body part comprises a bottom portion provided with passage openings, each of the compressor power terminals extending through a respective passage opening,, the method comprising the following steps:
attaching a bottom part of the electrical box to the hermetic casing,
positioning the terminal block assembly including the wire guiding part onto the compressor power terminals, so that the compressor power terminals are aligned with and inserted through the passage openings provided on the bottom portion of the body part,
bending the compressor power terminals about 90 degrees, so that end portions thereof extend substantially parallelly with the bottom portion of the body part, and so that apertures thereof are aligned with eyelets of the control wires and with the central bores of the metal inserts,
screwing and fixing the metal connection studs into the metal inserts,
mounting the locking nuts on the metal connection studs.