A heat storage type air source heat pump cold and hot water system and its operation method

Abstract

The invention provides a heat storage type air source heat pump water cooling and heating system and an operation method thereof, and belongs to the field of heat pump technologies and refrigerating air conditioners. The system comprises an outdoor source side, a heat pump host, a user side and a heat storage module. The outdoor source side comprises a refrigerating medium pump, an air cooling heat exchanger and source side valves. An outlet of the refrigerating medium pump is sequentially connected with the air cooling heat exchanger and the source side valves through pipelines and then returns to an inlet of the refrigerating medium pump through a first liquid cooling type heat exchanger of the heat pump host. A heat storage side mainly comprises a first valve, a second valve, a heat storage box, a third valve and a fourth valve. One side of the heat storage box is sequentially connected with the first valve and the source side valves on the source side through pipelines and then returns to the heat storage box through the second valve. The other side of the heat storage box is sequentially connected with the third valve and the user side valve on the user side through pipelines and then returns to the heat storage box through the fourth valve. By adopting the heat storage type air source heat pump water cooling and heating system, the capacity of a heat pump system supplying heat in winter can be greatly reduced, the primary investment is lowered, and the operation efficiency of the heat pump is improved.

Description

technical field [0001] The invention belongs to the field of heat pump technology and refrigeration and air conditioning, and relates to a thermal storage type flexible air source heat pump system. Background technique [0002] Air source heat pumps have been widely promoted and applied in the middle and lower reaches of the Yangtze River, Southwest China and South China due to their advantages of both cooling and heating, compact structure, energy saving and water saving, and convenient installation. However, for the northern region of my country, due to the main heating supply, to ensure the indoor heat load demand under extremely bad weather, the capacity selection of the heat pump unit is relatively large, resulting in the heat pump system operating under partial load most of the time, and the full load operating time Rarely, and thus inefficiently. Therefore, reducing the capacity of heat pump selection, solving the problem of large selection, and improving the operatin...

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Problems solved by technology

[0005] Aiming at the above-mentioned problems and shortcomings in the prior art, the present invention provides a regenerative air source heat pump cold and hot water system and its operation method, which solves the problem of too large selection of heat supply capacity of the heat pump in winter, and not only reduces the initial investment and improved operating efficiency of the heat pump

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