Switching valve fluid compressor and heat pump type refrigeratio

Details Switching valve fluid compressor and heat pump type refrigeratio Switching valve fluid compressor and heat pump type refrigeratio

1997-02-13

1999-03-23

Freay, Charles G.

Pumps

With condition responsive pumped fluid control

Responsive to pump created drive motor condition

417282, 4174103, 623426, 13762543, 251160, 251175, F04B 4902, A23G 900

Patent

active

058850627

ABSTRACT:
A switching valve comprises a valve body to which a plurality of fluid passages are connected, a slider having a gas passage capable of selectively connecting two fluid passages, a balance port for letting the gas passage communicate with the outside of the slider, a pilot valve for opening and closing the balance port, a moving mechanism for moving the pilot valve and the slider as one body in a predetermined direction alone, and a forwardly and reversely rotatable motor unit for driving the slider to open the balance port, thereby canceling a pressure difference between the inside and outside of the slider and then moving the slider to switch the fluid passages.

REFERENCES:
patent: 3371502 (1968-03-01), Heidorn
patent: 4474030 (1984-10-01), Ladusaw
patent: 4702088 (1987-10-01), Ozu
patent: 5507315 (1996-04-01), Parker
patent: 5547344 (1996-08-01), Sugiyama et al.

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