US Patent 12000639 Heat pump with multiple vapor generators

A heat pump includes a refrigerant loop. The refrigerant loop includes a compressor, a first vapor generator, a second vapor generator, and a third vapor generator. The compressor includes a low-pressure inlet, a mid-pressure inlet, and an outlet. The first vapor generator, the second vapor generator, and the third vapor generator are each positioned downstream of the outlet of the compressor. The first vapor generator, the second vapor generator, and the third vapor generator are each positioned upstream of the mid-pressure inlet of the compressor.