US 11,906,211 B2 · Heating, ventilation, and air conditioning system with primary and secondary heat transfer loops

Abstract

The present disclosure relates to a heating ventilation and air conditioning (HVAC) system. The system includes a primary heat transfer loop configured to be disposed at least partially outside of a building, and the primary heat transfer loop includes a heat exchanger, a compressor configured to compress a refrigerant, where the refrigerant is reactive, a condenser configured to receive and condense the refrigerant, and an expansion device configured to reduce a temperature of the refrigerant. The system further includes a secondary heat transfer loop configured to circulate a two-phase fluid at least partially inside the building, wherein the two-phase fluid is less reactive than the refrigerant. The secondary heat transfer loop includes the heat exchanger, where the heat exchanger is configured to transfer energy from the two-phase fluid circulating in the secondary heat transfer loop to the refrigerant, and an evaporator configured to evaporate the two-phase fluid by exchanging energy with an air supply stream flowing across the evaporator.

Claims20

Dependent claims

A heating, ventilation, and air conditioning (HVAC) system, comprising:

a primary heat transfer loop, comprising:
a heat exchanger;
and
a compressor configured to direct a first heat transfer fluid along the primary heat transfer loop and through the heat exchanger at a first operating pressure;
a secondary heat transfer loop, comprising:
the heat exchanger;
and
a pump configured to direct a second heat transfer fluid along the secondary heat transfer loop and through the heat exchanger at a second operating pressure higher than the first operating pressure;
and
a controller configured to receive feedback indicative of a first pressure of the first heat transfer fluid in the primary heat transfer loop, receive additional feedback indicative of a second pressure of the second heat transfer fluid in the secondary heat transfer loop, and adjust operation of the compressor, the pump, or both, based on the feedback and the additional feedback.

7 more elements

A heating, ventilation, and air conditioning (HVAC) system, comprising:

a compressor configured to direct a first heat transfer fluid through a primary heat transfer loop;
a pump configured to direct a second heat transfer fluid through a secondary heat transfer loop;
a heat exchanger fluidly coupled to the primary heat transfer loop and the secondary heat transfer loop, wherein the heat exchanger is configured to receive a flow of the first heat transfer fluid at a first operating pressure and a flow of the second heat transfer fluid at a second operating pressure higher than the first operating pressure;
and
a controller configured to:
receive first feedback indicative of a first pressure of the first heat transfer fluid in the primary heat transfer loop and second feedback indicative of a second pressure of the second heat transfer fluid in the secondary heat transfer loop;
and
adjust operation of the compressor, the pump, or both, based on the first feedback and the second feedback.

5 more elements

Dependencies are inferred from the claim text.

Heating, ventilation, and air conditioning system with primary and secondary heat transfer loops

Life of this patent

Heating, ventilation, and air conditioning system with primary and secondary heat transfer loops

Life of this patent

Abstract

Claims20