All-working-condition heat-pump heat recovery type fresh air ventilator with multiple reheating modes

Abstract

The invention relates to an all-working-condition heat-pump heat recovery type fresh air ventilator with multiple reheating modes. A reheating coil and a bypass pipeline are particularly arranged in the fresh air ventilator, condensation heat and / or supercooling heat of a refrigerant in a steam compression cycle can be selected for reheating fresh air through opening and closing of an air door andflow path conversion, the multiple reheating modes of supercooling reheating, condensation reheating, semi-condensation reheating and the like are provided for a unit to select under different loadsof a refrigeration and dehumidification mode in summer, and it can be guaranteed that an air outlet temperature is higher than a set value. Compared with the prior art, the fresh air ventilator can beadjusted as required under different loads in summer, the requirement for the air outlet temperature can be met all the time, and particularly the requirement that the air outlet temperature of the fresh air dehumidifier is not lower than 22 DEG C in the new national standard is met; and the heat-pump heat recovery type fresh air ventilator can match all-year working conditions in a targeted andcomprehensive mode, 14 operation modes including refrigeration and dehumidification in summer, heating in winter and internal circulation in transition seasons can be achieved, and the fresh air ventilator is more suitable for household all-year fresh air supply.

Description

technical field [0001] The invention relates to an integral fresh air blower, in particular to a full working condition heat pump heat recovery fresh air blower with multiple reheating modes. Background technique [0002] Many modern buildings, especially residential buildings, have begun to introduce fresh air air conditioning systems to improve indoor air quality. With the further expansion of the fresh air fan market in the household field, the Ministry of Housing and Urban-Rural Development took the lead in formulating the relevant national standards for household fresh air dehumidifiers, namely "Household Fresh Air Dehumidifiers (Draft for Comment)". The new national standard puts forward higher requirements for household fresh air fans in terms of fresh air filtration, cooling (heating) and dehumidification, especially the requirement that the air supply temperature in summer should not be lower than 22°C. Products currently on the market are difficult to meet this st...

AI Technical Summary

Problems solved by technology

[0004] While the new national standard regulates product energy efficiency and improves user comfort, it also poses many challenges to the design of fresh air fans. At present, the common problems of heat pump heat recovery fresh air fans are: (1) The applicable working conditions are limited, and most of them provide simple Fresh air and dehumidification mode, it is difficult to achieve full coverage of fresh air cooling, heating, dehumidification, and internal circulation across different seasons; (2) The comfort is not good, and the temperature of the air supply in summer is low, and it is difficult to ensure that it is above 22°C

This practice will result in that when the indoor load is low in summer, the supply air temperature cannot meet the requirement of not lower than 22°C in the new national standard.

Fresh air with a low temperature entering the room can easily cause a feeling of blowing, and the human body is less comfortable

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