Refrigeration – Reversible – i.e. – heat pump – With product treatment
Patent
1979-04-04
1981-02-03
Wayner, William E.
Refrigeration
Reversible, i.e., heat pump
With product treatment
13762543, 236 80G, F25B 1300, E03B 300
Patent
active
042480582
ABSTRACT:
A differential piston type reversing valve construction having a housing body provided with a high pressure chamber that has a valve member slideable therein for selectively interconnecting said high pressure chamber to either port of a pair of ports interrupting a valve seat of the housing body while interconnecting a low pressure port of the valve seat to the other port of the pair of ports, the valve member having a small piston member and a large piston member interconnected thereto and being disposed spaced from each other to define an intermediate chamber therebetween. The small piston member has one side thereof exposed to the high pressure chamber and the large piston member has one side thereof exposed to a control chamber of the housing body. The valve construction is provided with means for effectively interconnecting the high pressure chamber to the intermediate chamber and the low pressure port to the control chamber to cause the valve member to slide to one position thereof in the high pressure chamber. Such means is also adapted to effectively interconnect the high pressure chamber to the control chamber and the low pressure port to the intermediate chamber to cause the valve member to slide to another position thereof in the high pressure chamber, the construction having means for effectively disconnecting the low pressure port from the intermediate chamber while maintaining the interconnection between the high pressure chamber and the control chamber when the valve member is moved to the other position thereof.
REFERENCES:
patent: 2329001 (1943-09-01), Robinson
patent: 3369790 (1968-02-01), McHale et al.
patent: 3736958 (1973-06-01), Rostad
patent: 3894561 (1975-07-01), Thornbery
Bauer Werner R.
Candor James T.
Robertshaw Controls Company
Wayner William E.
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