Cyclic heating type CO2 heat pump water heater and control method thereof

• Main Authors: YANG LIHUI, CHEN YUNGUANG
• Format: Patent
• Language: Chinese; English
• Published: 21.06.2024
• Subjects: BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEATGENERATING MEANS, IN GENERAL; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; RANGES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; VENTILATING; WEAPONS

The invention discloses a cyclic heating type CO2 heat pump water heater and a control method thereof.The water heater comprises a compressor, a gas cooler, an electronic expansion valve, an evaporator, a water tank and an energy storage heat exchanger, an outlet of the gas cooler is connected with a water inlet of the water tank through a water supply pipeline, and an inlet of the gas cooler is connected with a water outlet of the water tank through a water supply pipeline; an outlet of the compressor is connected with a refrigerant inlet of the gas cooler through a main pipeline, and a refrigerant outlet of the gas cooler is connected with a refrigerant inlet of the energy storage heat exchanger and an inlet of the evaporator through branch pipelines. A refrigerant outlet of the energy storage heat exchanger is connected with an inlet of the compressor and an inlet of the evaporator through branch pipelines, and an outlet of the evaporator is connected with the inlet of the compressor through a branch pipel