| 摘要 |
A heating module 1 contains a primary 5 and a secondary 4 refrigerant to water heat exchanger, a modulated variable flow rate water pump 7, and an electronically operated system controller 2. The refrigerant enters the heating module and passes through the primary heat exchanger where the sensible heat of the refrigerant vapour is absorbed. The refrigerant vapour then passes through the secondary heat exchanger where it condenses and gives out heat energy. The water enters the secondary heat exchanger where it absorbs the heat energy given out by the refrigerant as it condenses. This heated water then passes through the primary heat exchanger where it is heated further by absorbing the sensible heat from the superheated refrigerant vapour. An existing heat pump outdoor evaporator unit 3 comprises an evaporator, an expansion valve, a fan and a compressor. The controller controls compressor speed, refrigerant flow, pressure in the existing outdoor unit, and modulates the water flow through the heat exchangers in the heating module. The controller may include an auto defrost start/stop sensor which measures ice build up on the outdoor heat exchange coil. The controller may also be set to activate an additional water heater in a water tank to eliminate Legionella bacteria. The heating module when attached or incorporated into the design of an existing air to refrigerant heat pump outdoor unit is designed to increase the efficiency of the system, reduce operating head pressure, reduce re-heat times, and provide higher water temperatures than formerly obtained for domestic hot water or heating. |
