Solenoid pilot valve for a hydraulic valve, in particular for household appliances

摘要

The pilot valve (14) comprises a body (7, 7a) in which there is defined a control chamber (11) which is intended to communicate with the inlet (3) of the hydraulic valve (1) and which, through a restricted outlet passage (12) associated with a valve seat (13), is able to be selectively brought into communication with the outlet (4) of the hydraulic valve (1); at least one core (23) mounted movably within a portion (7a) of said body (7, 7a) and inside the control chamber (11) and carrying a closing member (24) cooperating with the valve seat (13); and an actuator (16-21) including a solenoid or coil (15) of copper wire, mounted around said portion (7a) of the body (7, 7a), for selectively controlling the position of the core (23) and the closing member (24) with respect to the valve seat (13) and the communication between the control chamber (11) and the restricted outlet passage (12); and wherein the ratio of the diameter (d) of the restricted outlet passage (12) to the weight (m) of the solenoid (16) is between 0.06 and 0.10 mm/g.

主权项

1. A solenoid pilot valve (14) with a solenoid (15) for a hydraulic valve (1) of a household appliance, comprising:
a body (7, 7a) in which there is defined a control chamber (11) which is intended to communicate with the inlet (3) of the hydraulic valve (1) and which, through a restricted outlet passage (12) associated with a valve seat (13), is able to be selectively brought into communication with the outlet (4) of the hydraulic valve (1); at least one core (23) mounted movably within a portion (7a) of said body (7, 7a) and inside said control chamber (11) and carrying a closing member (24) cooperating with the valve seat (13); and an actuator (16-21) including a solenoid or coil (15) of copper wire, mounted around said portion (7a) of the body (7, 7a), for selectively controlling the position of the core (23) and the closing member (24) with respect to the valve seat (13) and the communication between the control chamber (11) and said restricted outlet passage (12); wherein the ratio of the diameter (d) of said restricted outlet passage (12) to the weight (m) of the solenoid (16) is between 0.06 and 0.10 mm/g, wherein the pilot valve is for a hydraulic valve (1) which comprises a base body (2) which, around a main opening (2a) for mounting the body (7) of the pilot valve (14), has a plurality of positioning projections (2b) suitable for defining a plurality of angular positions for the actuator (15-21) of the pilot valve (14), said actuator (15-21) having at least one lug (21a; 16e) able to be selectively coupled with one of said positioning projections (2b) so as to define a corresponding angular position of use for the actuator (15-21), and wherein the solenoid (15) is at least partially surrounded by a structure (16) of magnetic material which has at least one transversely protruding lug (16e) able to be selectively coupled with one of said positioning projections (2b).