Patent Application
20170292724
This application claims priority to Ukrainian patent application number U201603996 filed on Apr. 12, 2016 and incorporated herewith by reference its entirety.
The utility model Is intended for use in ventilation and air conditioning systems at industrial, housing, and social and administrative facilities for supply and exhaust ventilation of small premises with limited installation space.
Prior art shows a ventilation device with a frame comprising a supply-air intake port, supply-air blowout port, discharge-air intake port, discharge-air blowout port, supply-air blower, discharge-air blower, heat-exchanger, and damper. The frame of said device has a discharge air entry zone, discharge air exit zone, supply air entry zone, and supply air exit zone (Patent EP2581675).
The disadvantage of this prior art is that the damper is located between die discharge air entry zone into the system and discharge air exit zone from the heat-exchanger while the circulation of discharge air from the discharge air exit zone from the system into the discharge air entry zone into the system is impossible. The damper regulates the supply air temperature in the operating mode. When the heat-exchanger frosts, air movement through the heat-exchanger is difficult which creates imbalance in the room. Thus, the freezing problem of the heat-exchanger in this prior art is not solved because the defrosting mode of the heat-exchanger is not provided in this prior art.
The closest prior art to the claimed technical decision is a supply and exhaust system (Patent RU2538516), the frame of which has supply-air intake and blowout ports and exhaust-air intake and blowout ports for the corresponding exhaust air entry zones into the system and exhaust air exit zones from the system, a filtering element for supply air intake, a heating element for supply air blowout, a heating element for exhaust air, a condensate drain tray from the plate recuperative heat-exchanger, and the damper and supply and exhaust fans that are connected to the control unit.
The disadvantage of the system is that it requires much time and effort for additional control during the operation despite the complicated construction of the device. The main task of the utility model is to improve the operation of the supply and exhaust ventilation system through the use of additional elements that will allow to automate the process.
The problem is solved by an operation method of the supply and exhaust ventilation unit that has a frame and at least one fan, a slide damper with an electric drive, and control unit. The frame also has intake and blowout ports for the corresponding exhaust air entrance zones into the system and exhaust air exit zones from the system, which can be used for both supply and exhaust air.
The method entails an installation of additional elements in the unit—sensors (for example, temperature and humidity sensors) that help to control and regulate the operation and parameters of the device via the control unit. The sensors are installed on the inner surface of the device and they send information to the control unit after determining the parameters. Fresh air is supplied into the room in the “supply” mode via the supply fan, the exhaust fan is switched off, and the exhaust duct is blocked with the slide damper. As a result, the fan automatically maintains the specified level of air humidity in the room. When air humidity reaches the specified level that is to be removed from the room, the fan switches to the “exhaust” mode, the supply air fan is switched off, and the supply duct is blocked with the slide damper. When the level of humidity decreases below the specified level that is set at the control unit, the fan returns to the “supply” mode. The method may be implemented with different unit options: with one reversible fan or with two fans, where if the unit has two fans, then one supply fan and one exhaust fan may he used in the operation, or alternatively, a reversible fan may be used in the operation instead of one of the fans.
For example, the exhaust can be carried out from the bathroom, and fresh air then enters the fan coil of the premises.
A metal frame of the ventilation unit is equipped with two fans (1,2) and a slide damper with an electric drive (4) (an option of operating the unit with one supply fan and one exhaust fan). The slide damper closes the supply or exhaust duct depending on the fan operation mode—“supply” or “exhaust.” The operation of the slide damper and fans is carried out with the help of the controller. A control unit (3) for power supply connections and external devices is installed on the side panel of the frame. A maintenance cover for unit maintenance is on the lower panel of the frame. Four mounting brackets are installed in the frame. Fresh air is supplied into the room in the “supply” mode via the supply fan, the exhaust fan is switched off, and the exhaust duct is blocked with the slide damper. The fan automatically maintains the specified level of air humidity in the room. When air humidity reaches the specified level that is to be removed from the room, the fan switches to the “exhaust” mode, the supply air fan is switched oft and the supply duct is blocked with the slide damper. The fan returns to the “supply” mode when the level of humidity decreases below the specified level.
When operating the ventilation unit with one reversible fan (5), the process differs in that during “supply” and “exhaust,” one and the same fan works instead of the two but in different modes.
The unit is designed for suspended ceiling installation, as well as installation at any angle with respect to the fan axis. The unit is attached to the surface by means of four mounting brackets installed in the frame. Anchoring threaded bolts with nuts and vibration-protective rubber are recommended for use in order to attach the fan to the ceiling. Mounting hardware is not included and is sold separately. When selecting mounting hardware, the mounting surface material and the weight of the unit must be taken into consideration. The hardware must be selected by the expert! Before installing the unit, make sure that the frame is clear from debris and foreign objects, for example, paper or plastic. The unit must be accessible for maintenance or repairs during the installation. The ventilation unit is designed to operate in a single-phase AC power system of 120V/60 Hz. The fan is connected to the power system with the help of the durable and heat-resistant isolated wire (cable, wires), with the wire cross-sectional area of not less than 1 mm2 (18 AWG). The fan must be connected via the magnetic-only breaker built in the stationary power network. There must be free access to the external switch for emergency shutdown of the unit. The operating current of the magnetic-only breaker must comply with the current draw of the unit. The fan is controlled by the controller.
Thus, the technical result is achieved by improving the operation of the supply and exhaust ventilation unit through the use of additional elements that will allow to automate the process.
| Number | Date | Country | Kind |
|---|---|---|---|
| U201603996 | Apr 2016 | UA | national |
