公开(公告)号：US3159208A

公开(公告)日：1964-12-01

申请号：US9787261

申请日：1961-03-23

Applicant: HONEYWELL INC

Inventor： JOESTING FREDERICK D

IPC: F15C1/00 ,  F24F11/06 ,  G05D23/185

CPC classification number: F15C1/008 ,  F24F11/83 ,  G05D23/185 ,  Y10T137/2071

Abstract: 1,006,407. Heating and cooling systems for buildings. HONEYWELL Inc. March 23, 1962 [March 23, 1961], No. 11263/62. Heading F4U. [Also in Division G3] A fluid switch 24, Fig. 1, is used to control the flow to a heat exchange unit 26 of a room heating or cooling circuit. The fluid switch comprises a main power jet 33, Fig. 2, connected with an inlet 32, an outlet duct 35 and a by-pass duct 36 leading to an exhaust passage 41 to which the return duct 27 from the unit 26 is also connected. The impedance to flow in the by-pass duct 36 is so adjusted, e.g. by adjusting a vane 43, that when the flow is through this duct the fluid pressures in the duct 35 and the return duct 27 are substantially the same, so ensuring that there is no flow through the unit 26. A thermostat 21 controls the application of a control jet to the inlet 38 to switch the main jet from the outlet duct 35 to the duct 36. In another example, Fig. 4, the main jet stream is biased to the by-pass duct 58 leading to the exhaust passage 62 to which the return duct 27, 62 from the heat exchange unit 26 is connected. Two opposed control jets may be provided. Specification 1,001,544 is referred to.