CZ9902726A3 - 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

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 device is very demanding in terms of space and price and technically and in terms of operation it is very 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 air handling unit with heat recovery consisting of two radial fans, a counter-flow heat exchanger and a hot-water register is to place a single rotary mixing flap between the inlet air recirculation throat, the outlet section the recirculation air inlet and outlet section of the regenerative counterflow heat exchanger.

The unit according to the invention provides two-zone ventilation of single-family houses and individual flats, where the circulation zone of the unit with circulation fan, heater and hot-air filter heats and ventilates the living room. The ventilation zone of the unit with exhaust fan, recuperation exchanger and pre-filters is ventilated independently to the sanitary facilities. The primary circulating air V2 supplied to the living rooms is cooled by the cooled VI back into the unit and a part (usually 10 to 25%) is sucked under the door to sanitary facilities (toilets, bathrooms, kitchens). to the unit where it transfers heat in the waste section of the recuperation exchanger and the cooled air Vi2 is blown out. The fresh outdoor air Vel is sucked in quantity according to the mixing flap setting into the inlet section of the recuperation exchanger, where it is preheated, mixed with recirculating air VI, filtered and reheated in the heater. living rooms. This two-zone system completely eliminates the contamination of the circulating air with odor and moisture, ensuring that a set amount of fresh air in the circulating air is supplied to the living rooms and thus the necessary ventilation intensity.

In the transitional period when it is not necessary to heat the house f, the unit's circulation fan is switched off and the sanitary facilities are ventilated only by the vacuum operation of the suction fan, when the mixing flap is closed automatically. At the same time, regenerative ventilation of the entire building is ensured because fresh air is sucked through the regenerative heat exchanger, filter and heater to the floor outlet in the living room.

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

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a two-zone heat recovery unit in countercurrent design; Fig. 2 shows a two-zone heat recovery unit in concurrent horizontal design.

DETAILED DESCRIPTION OF THE INVENTION

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

In the housing of the housing 1 there are located the inlet 9 of the recirculating air V1, the outlet 10 of the recirculating air V2, the inlet 11 of the exhaust air 11, the outlet 12 of the exhaust air 12 and the inlet 13 of the fresh outside air.

Claims (1)

PATENT CLAIMS A two-zone heat recovery air handling unit consisting of two radial fans of a recuperative counterflow heat exchanger and an air heater, characterized in that in the housing (1) between the inlet air recirculation (VI) throat (9), the outlet section of the recuperative counterflow (4) and the main filter (6) is provided with a single rotary mixing flap (8), which covers the inlet (9) inlet of the recirculation air (VI) and the outlet section of the recuperation exchanger (4).