CZ289567B6 - Two-zone air-conditioning unit with heat recuperation - Google Patents

Abstract

Disclosed is a two-zone air-conditioning unit with heat recuperation consisting of a housing (1), two paddle wheel fans (2, 3), a recuperative countercurrent heat exchanger (4), an air heater (5) and a filter (6). The invented air-conditioning unit is characterized by location of a single rotary mixing flap (8) within the housing (1) between the inlet circulating air (V1) branch (9) and outlet section of the recuperative countercurrent heat exchanger (4) and the main filter (6), whereby the flap (8) cover in its extreme positions and inside the housing (1) both said inlet circulating air (V1) branch (9) and said recuperative countercurrent heat exchanger (4) outlet section.

Description

Dual zone air handling unit with heat recovery

Technical field

BACKGROUND OF THE INVENTION The invention relates to a dual-zone air-conditioning unit with heat recovery for central ventilation and hot-air heating of family houses and residential units.

BACKGROUND OF THE INVENTION

Current hot-air heating systems for single-family homes use exclusively a central heating unit with a fan, heater and filter for 100% circulating closed heating or air cooling in the building.

Ventilation is then provided by another separate air handling unit with recuperation connected separately to the circulating heating circuit piping, which contains two fans, a recuperation exchanger, filters and control elements. The overall system of this equipment is very space and cost intensive and technically complicated. In addition, for hygienic reasons, the exhaust air from the sanitary facilities cannot be circulated back to the living rooms, so these rooms must be extracted separately outside the circulating air-conditioning system.

SUMMARY OF THE INVENTION

The essence of the dual-zone heat recovery air handling unit, consisting of a housing, two radial fans, a recuperative countercurrent heat exchanger and an air heater, is to place a single rotary mixing flap between the inlet air recirculation port, the outlet section of the recuperative countercurrent heat exchanger and In the extreme positions, the inlet of the recirculation air inlet and the outlet section of the regenerative counterflow heat exchanger cover from inside the unit housing.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a dual-zone air handling unit with heat recovery in counter-current design; Fig. 2 shows a dual-zone air handling unit with heat recovery in co-current horizontal design.

DETAILED DESCRIPTION OF THE INVENTION

The unit according to the invention in FIGS. 1 and 2 consists of a housing 1 in which a circulating fan 2, an exhaust fan 3, a recuperative counter-flow exchanger 4, an air heater 5, a main filter 6, a pre-filter 7 and a rotary mixing flap 8 are mounted.

The neck 9 of the inlet circulating air VI is located in the housing 1 of the housing. outlet 10 of the recirculation air V2. Exhaust air inlet 11, Exhaust air outlet 12, Exhaust air 12, Exhaust air 12, Exhaust air 12, Exhaust air 12

The dual-zone air-handling unit with heat recovery according to the invention provides dual-zone ventilation of single-family houses and individual flats, where the circulation zone of the air-handling unit with circulation fan 2, air heater 5 and main filter 6 heats the air and heats the living room. The ventilation zone of the unit with the exhaust fan 3, the recuperation exchanger 4 and the pre-filters 7 ventilate the sanitary facilities independently. Primary

The circulating air V2 supplied to the living rooms is extracted as cooled circulating air VI back into the air handling unit and a part (usually 10 to 25%) is sucked under the door into sanitary facilities (toilets, bathrooms, kitchens). it discharges air polluted by odor and moisture through a duct to an air handling unit where it transfers heat 5 in the waste section of the heat exchanger 4 and the cooled air Vi2 is blown out. The fresh outdoor air Vel is sucked in quantity according to the setting of the mixing flap 8 into the inlet section of the heat exchanger 4, where it is preheated, mixed with the circulating air VI, filtered and reheated in the air heater 5 and fed to the living rooms. This two-zone system completely eliminates the contamination of the circulating air VI with odor and moisture and ensures that a set amount of fresh air Vel in the circulating air VI is supplied to the living rooms and thus the necessary ventilation intensity.

In the transitional period when there is no need to heat the house, the circulating fan 2 of the air handling unit is switched off and the sanitary facilities are ventilated only by vacuum 15 by continuous operation of the exhaust fan 3, when the mixing flap 8 is closed automatically.

At the same time, recuperative ventilation of the whole building is ensured, since fresh air Vel is supplied to the floor diffusers in the living rooms via the exchanger 4, the main filter 6 and the air heater 5 by means of vacuum.

In summer, instead of the heat exchanger 4 in the air handling unit, an asymmetric short-circuit part is installed and the living areas of the house are ventilated only with fresh filtered air. with cooling when the coolant is connected to the air heater 5 or with night pre-cooling. At the same time, however, the air from the sanitary facilities is permanently extracted.

Claims (1)

Dual-zone air-conditioning unit with heat recovery, consisting of a housing (1), two radial fans (2, 3), a recuperative counterflow heat exchanger (4), an air heater (5) and a filter (6), characterized in that a single rotary mixing flap (8) is located in the housing (1) between the inlet air recirculation (VI) throat (9), the outlet section of the regenerative counterflow heat exchanger (4) and the main filter (6), overlapping from the inside of the housing (1) inlet recirculation air inlet (VI) and outlet section of recuperation exchanger (4).