Double-heat-source heat pump water heater for ship and control method of heat pump water heater

Abstract

The invention relates to a heat pump technology used on a ship, in particular to a double-heat-source heat pump water heater for a ship and a control method of the heat pump water heater. The water heater comprises a refrigerant loop, a domestic water loop, a seawater loop and an electric cabinet. The method comprises the steps as follows: an air source heat pump is organically combined with a seawater source heat pump, and evaporators are switched with a proper control method. According to the heat pump water heater and the control method, air energy can be fully used, at the same time, the condition that the water resource is abundant in a ship working environment also is fully used, the defect that the air source heat pump is difficult to prepare hot water when the ship sails in a cold region or a cold season is overcome, seawater heat can be reasonably used, and a purpose of reducing power consumption for preparing hot water is achieved.

Description

technical field [0001] The invention relates to a heat pump technology used on a ship, specifically a method for preparing hot water and a hot water system thereof at a lower cost during a ship's voyage, and particularly relates to a switchable control system that makes full use of the ship's sailing conditions A double evaporator heat pump, a dual heat source marine heat pump water heater with a seawater source evaporator and an air source evaporator and a control method thereof. technical background [0002] At present, water heater products mainly include gas water heaters, electric water heaters, solar water heaters, and heat pump water heaters. They have both their own advantages and their own disadvantages. Ignition water heaters are the most convenient to use, ready to use, but the safety performance is poor, improper installation and use will cause carbon monoxide poisoning, there is a danger of explosion and fire, and the pollution is serious. Therefore, some consu...

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Problems solved by technology

Furthermore, the system uses waste water collection technology for heat recovery. Although a part of the heat can be recovered theoretically, since the temperature of the waste water is not too high and the heat dissipation area is large, a large amount of heat has been lost during the collection process. For the purpose of effective heat recovery, the initial investment is also high

The treatment of wastewater is difficult, and the dirt of wastewater has a corrosive effect on the evaporator, which not only affects heat recovery, but also increases the difficulty of recovery

Due to the large size of the equipment and the large space occupied, this waste water recovery technology cannot be used on ships

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