System and method applied to cascaded utilization of energy of exhaust air, air conditioner and heat pump water heating device

Abstract

The invention discloses a system and a method applied to cascaded utilization of energy of exhaust air, an air conditioner and a heat pump water heating device. The system comprises an outdoor air conditioning device, an air source heat pump water heating unit outdoor device, an air exhausting device side static pressure box, an outdoor device side static pressure box, an energy cascaded utilization system controller, at least one variable-frequency air exhausting device and a plurality of air valves. The invention also discloses a control method of the energy cascaded utilization system. The method comprises the following steps: arranging building air outlets in air inlet areas of the outdoor air conditioning device and the air source heat pump water heating unit outdoor device; and controlling opening and closing of the air valve, forward rotation and backward rotation of a bidirectional axial flow fan of the air source heat pump water heating unit outdoor device and variable-frequency operation of the variable-frequency air exhausting devices. The system and the method are capable of simultaneously carrying out cascaded utilization of cooling/heating energy and cascaded utilization of airflow kinetic energy, enhancing air exhaust, reducing air exhaust energy consumption, eliminating the phenomena that the air exhaust is not smooth and even the natural air flows backward, recycling the cooling/heating energy in the exhaust air, improving the efficiency of the outdoor unit of the air conditioner and the heat pump water heating unit, and reducing the operation energy consumption of the system.

Description

technical field [0001] The invention relates to a system and method for energy cascade utilization of air exhaust, air conditioner and heat pump hot water equipment. Background technique [0002] About the building exhaust system: The building exhaust system is used to exhaust indoor exhaust gas, and its air outlet is always installed on the facade or roof, exposed to the natural wind environment. Due to the effect of natural wind, it is easy to cause the exhaust system to be unsmooth and even the natural wind to flow into the exhaust system. It is generally stipulated that the indoor fresh air volume should not be less than 30m 3 / (h·person) is determined, and the fresh air volume for maintaining indoor positive pressure and local exhaust air should also be considered, so for buildings running air-conditioning systems, the exhaust air volume is considerable, and the exhaust air temperature in summer can be as low as 24°C, and the exhaust air temperature in winter is as hi...

AI Technical Summary

Problems solved by technology

However, at present, buildings lack an effective energy cascade utilization method, the recycling rate of building exhaust energy (thermal energy and kinetic energy) is limited, and the energy discharged from outdoor units of air conditioners and heat pump water heaters (including the energy discharged by outdoor units of air conditioners in summer The heat energy in the hot air, etc.) is directly discharged without utilization, resulting in energy waste

Images