Water-tank water temperature stratification structure used for CO2 heat-pump water heater

Abstract

The invention relates to a water-tank water temperature stratification structure used for a CO2 heat-pump water heater. Cold and hot fluid layering devices additionally arranged in two water tanks are retaining plates vertically and transversely arranged in the water tanks, or partitions, and at least one partition is arranged in the water tanks, or combinations of the retaining plates and the partitions in the water tanks. The water tanks are serially connected together, and the cold water outlet of one water tank is connected with the hot water inlet of the other water tank. Made of foam thermal insulation materials, the horizontal and vertical retaining plates or the partitions are additionally arranged in the water tanks, and heat transferring via temperature difference between cold and hot fluids can be reduced; mutual blending of the cold and hot fluids in the water tanks can be reduced by adopting the mode that the retaining plates and the partitions are combined or the water tanks are serially connected, stratification of the cold and hot fluids in the water tanks can be realized, and stratification of temperature can be achieved; water in upper portions of the water tanks is kept at a high temperature, hot water with the temperature meeting the need of a user can be supplied, circulating water flowing to an air cooler can be stabilized at a lower temperature, and COP (coefficient of performance) of a system can be improved.

Description

technical field [0001] The present invention relates to a method for CO 2 The water tank of the heat pump water heater, especially one that can provide users with hot water that meets the needs, and at the same time can ensure that the temperature of the circulating water supplied to the air cooler is low to increase the CO 2 COP tank for heat pump water heater system. Background technique [0002] Energy saving and environmental protection are two important topics of scientific development in the 21st century. The replacement of CFCS has become a common concern of the whole world. CO 2 As a natural working medium, it has been valued again. On the one hand, carbon dioxide is environmentally friendly and non-toxic, and will not damage the ozone layer. On the other hand, the high-temperature side of the carbon dioxide heat pump system has a higher temperature, which can provide hot water at a higher temperature than air source heat pumps. Therefore, carbon dioxide heat pump ...

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Problems solved by technology

[0004] The fluids in the traditional water tank are mixed with each other to exchange heat, resulting in uniform water temperature distribution, the temperature of the water outlet side drops, and the hot water that meets the needs of users cannot be provided; the temperature of the water supplied to the gas cooler rises, and the CO 2 COP reduction of heat pump water heater system

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