US 4,287,939 A · Air conditioning control system with local and remote control capabilities

Abstract

A versatile yet low cost mode selection control system for an air conditioning unit such as a combination heating and cooling unit having a plurality of operational modes, and which control system is capable of responding both to a relatively local mode selection unit and a relatively remote mode selection unit. Both the relatively local mode selection unit and the relatively remote mode selection unit can exercise independent control over the mode selection, not necessarily limited to mere on/off control, and either may override a selection made at the other at any time. Electronic momentary push button and holding circuitry is employed electronically provide a function similar to that of the prior art mechanical push button configuration wherein only one push button can be actuated at a time, with actuation of any one push button deactuating all others.

Claims7

Dependent claims

A control system for an air conditioning unit having a plurality of operational modes, said control system comprising:

mode selection memory circuitry capable of storing and unstoring representations corresponding to each of the operational modes, said memory circuitry having mode selection inputs responsive to momentary actuations and operable when a particular actuation occurs to store the representation corresponding to the particular selected mode and to unstore any other representations;
an operative connection between said memory circuitry and the air conditioning unit to effect operation of the air conditioning unit in the mode corresponding to any particular stored representation;
a relatively local mode selection unit including a plurality of momentarily actuable switching elements connected to said mode selection inputs;
and
a relatively remote mode selection unit including at least one momentarily actuable switching element additionally connected to said mode selection memory circuitry for selecting at least one particular mode.

2 more elements

Dependencies are inferred from the claim text.

Air conditioning control system with local and remote control capabilities

Life of this patent

Air conditioning control system with local and remote control capabilities

Life of this patent

Abstract

Claims7