Centrifugal fan driven by an electronic-commutation direct-curre

Details Centrifugal fan driven by an electronic-commutation direct-curre Centrifugal fan driven by an electronic-commutation direct-curre

1987-08-31

1988-09-27

Croyle, Carlton R.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417423R, 310 68R, F04B 3906

Patent

active

047738294

ABSTRACT:
A centrifugal fan driven by an electronic-commutation d.c. motor is provided with a housing (1) which defines a volute (2), an impeller (4) which is coupled for rotation with the motor shaft (7) being mounted within the fan housing. The motor is placed within a protective casing (13) which also contains at least one printed-circuit board (23) for supporting the motor control circuit (26), the casing being adjacent to the external face (36) of a closure disk (9) of the fan housing (1).
The fan motor casing (13) has an annular extension (14) corresponding to the fan housing (1) and the printed-circuit board (23) is housed within said extension and placed in substantially parallel relation to the fan-housing closure disk (9) in sufficiently close proximity to said disk to be subjected primarily by thermal conduction to the cooling action produced by the fan impeller (4).

REFERENCES:
patent: 3809935 (1974-05-01), Kristen et al.
patent: 4315343 (1982-02-01), Neroda et al.
patent: 4371313 (1983-02-01), Burgbacher et al.
patent: 4385276 (1983-05-01), Bitzel
patent: 4521706 (1985-06-01), Kudelski et al.
patent: 4558245 (1985-12-01), Glasaver et al.
patent: 4578605 (1986-03-01), Reinhardt et al.
patent: 4588912 (1986-05-01), Shinmura et al.
patent: 4642496 (1987-02-01), Kervial et al.
patent: 4668898 (1987-05-01), Harms et al.

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