Single-stage carbon dioxide multi-split cooling and heating multifunctional central air conditioner

A single-stage carbon dioxide multi-split cooling and heating multifunctional central air conditioner, comprising:

• a single-stage carbon dioxide circulation system using carbon dioxide as a circulating working medium, wherein the single-stage carbon dioxide circulation system comprises an outdoor unit and a plurality of end heat exchangers, the plurality of end heat exchangers are arranged in parallel, and cooling and/or heating is performed by the carbon dioxide circulating in a carbon dioxide compressor, an outdoor heat exchanger, a liquid storage tank, and the plurality of end heat exchangers, wherein the carbon dioxide compressor, the outdoor heat exchanger, the liquid storage tank, and the plurality of end heat exchangers are communicated with each other;
• wherein the central air conditioner comprises a first high-pressure four-way valve and a second high-pressure four-way valve, four ports of the first high-pressure four-way valve are respectively connected to a suction end of the carbon dioxide compressor, an exhaust end of the carbon dioxide compressor, the outdoor heat exchanger, and the plurality of end heat exchangers;
• and four ports of the second high-pressure four-way valve are respectively connected to the outdoor heat exchanger, a liquid inlet of the liquid storage tank, a liquid outlet of the liquid storage tank, and the plurality of end heat exchangers.