Multi-working-mode heat pump heat recovery type fresh air ventilator

Abstract

The invention relates to a multi-working-mode heat pump heat recovery type fresh air ventilator. The fresh air ventilator comprises a first air duct, a second air duct and a refrigerant loop. An air return port and an air exhaust port are formed in the first air duct; an air supply port and a fresh air port are formed in the second air duct; an air mixing air door enabling the first air duct to communicate with the second air duct is arranged between the first air duct and the second air duct; an air exhaust fan and an air supply fan are arranged in the air exhaust port of the first air duct and the air supply port of the second air duct correspondingly; and the refrigerant loop comprises a compressor, a four-way reversing valve, an exhaust coil pipe, a supercooling coil pipe, a first throttling device, a reheating coil pipe, a second throttling device and an air supply coil pipe which are connected in sequence. Compared with the prior art, the four modes of a summer high-load refrigeration and dehumidification mode, a summer low-load refrigeration and dehumidification mode, a transition season internal circulation mode and a winter heating mode are achieved through opening and closing of the air door and flow path conversion, all-season fresh air supply is met, and the multi-working-mode heat pump heat recovery type fresh air ventilator is suitable for being used under variousworking conditions throughout the year.

Description

technical field [0001] The invention relates to an integral fresh air blower, in particular to a heat pump heat recovery type fresh air blower with multiple working modes. Background technique [0002] Many modern buildings, especially residential buildings, are beginning to introduce fresh air conditioning systems to improve indoor air quality. With the further expansion of the fresh air fan market in the household field, relevant departments have begun to formulate relevant national standards for household fresh air dehumidifiers. The new type of fresh air blower puts forward higher and stricter requirements, especially the provision that the air supply temperature in summer is not lower than 22 °C, and it is difficult for the products on the market to meet this standard. [0003] The heat pump type fresh air heat recovery technology is a new type of active heat recovery technology, which uses limited electric energy to recover the cooling and heat of the exhaust air thro...

AI Technical Summary

Problems solved by technology

This approach will lead to the fact that when the indoor load is low in summer, the supply air temperature cannot meet the requirement of not less than 22°C in the new national standard. At the same time, the fresh air with a low temperature entering the room will easily cause a blowing sensation and poor human comfort.

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