CENTRAL HEATING AND COOLING SYSTEM

• US 3,685,574 A
• Filed: 10/26/1970
• Issued: 08/22/1972
• Est. Priority Date: 11/05/1969
• Status: Expired due to Term

• Current Assignee: Philippe Worms
• Original Assignee: Philippe Worms
• Inventors: Worms, Philippe
• Primary Examiner(s): Sukalo, Charles
• Application Number:
  US05/083,888
• Time in Patent Office: 666 Days
• Field of Search: 165/22,50
• US Class Current: 165/221
• CPC Class Codes: F24F 3/06 characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units

Abstract

A central heating and cooling system comprising two independent circuits of the singe-tube type, a cold circuit which is coupled with its outgoing and return lines to a central cold-production machine and a hot circuit, also with outgoing and return lines coupled to a boiler or boilers, or alternatively to an exchanger or exchangers. These circuits comprise as many branch conduit lines as there are levels or stages in which the utilization points are located, each utilization point comprising a water-air temperature-exchange unit having a single air circuit. Each branch line has a pump upstream of its exchanger and a nonreturn valve downstream of its exchanger, flow through the branch line being from a first point on the associated main conduit to a second point on the associated main conduit, the first point being downstream of the second point with respect to flow of the heat exchange fluid through the main conduit. In this way the flow of the fluid through the branch line is prevented when the associated pump is not in operation.

Claims

1. A central heating and cooling system comprising separate heating and cooling circuits, said heating circuit including a first main conduit means connected to a central heating source for circulating a first heat-transfer fluid, said cooling circuit including a main conduit means connected to a central cooling source for circulating a second heat-transfer fluid, each of the circuits comprising a plurality of temperature exchange units, each temperature exchange unit being connected by a branch line between a first and a second point on its associated main conduit, a nonreturn valve and a pump in each of said branch lines, the flow of the heat-transfer fluid in each branch line being from said first point to said second point, said first point being downstream of said second point along the associated conduit means thereby preventing the flow of the heat-transfer fluids through the branch lines when their associated pumps are not in operation.

2. A system according to claim 1, wherein the first heat-transfer fluid is relatively hot water, and the second heat-transfer fluid is relatively cold water.

3. A system according to claim 1, wherein each temperature exchange unit of said heating circuit is grouped with one of the temperature exchange units of said cooling circuit to form a combined temperature exchange unit.

4. A system according to claim 3, wherein the pair of pumps of each combined temperature exchange unit are actuated by a single motor for alternative operation.

5. A system according to claim 3, further comprising a single reversible motorized pump unit for circulating heat-transfer fluid through the branch lines of each combined temperature exchange unit, and means responsive to delivery of the first heat-transfer fluid to a heating circuit branch line of the combined temperature exchange unit to interrupt the flow of the second heat-transfer fluid to the cooling circuit branch line of the same combined temperature exchange unit, and vice versa.