Winter antifreeze ceiling fresh air unit system

Abstract

The invention discloses a winter anti-freeze suspended ceiling fresh air unit system in the technical field of fresh air units, comprising a storage box, an air inlet pipe, an air outlet pipe, a support hanger, a humidity changing device, a temperature changing device, a suction system and a PLC controller , the whole is installed on the ceiling through the support hanger, the air inlet pipe and the installation round block at the end, the single-layer louver and the filter element are located outdoors or on the wall, and the positive and negative motors in the suction system drive the fan blades to complete the inward suction. Wind and air circulation, use the sealed square box, suction pipe and air guide pipe to blow the hot air in the room into the cavity on the left side of the first rectangular sealed box to complete the mixing with the inhaled cold air, and then complete the heating through the heating box to prevent The heating part of the heating box is faulty due to the large temperature difference. At the same time, the temperature and humidity of the incoming air can be changed by using the humidity changing device. This device uses a PLC controller to work with a variety of sensors, which improves its automation and is easy to use. Safety for winter use.

Description

technical field [0001] The invention relates to the technical field of fresh air units, in particular to a ceiling fresh air unit system with antifreeze in winter. Background technique [0002] A fresh air unit is an air conditioning device that provides fresh air. The working principle is to extract fresh air from the outside and send it to the room through the fan after dust removal, dehumidification (or humidification), cooling (or heating), etc., and replace the original indoor air when entering the indoor space, specifically: the temperature of the fresh air unit. The control system is composed of a proportional integral temperature controller, a temperature sensor installed in the air supply pipe and an electric regulating valve. The function of the controller is to transmit the temperature of the supply air detected by the temperature sensor placed in the supply air duct to the thermostat for comparison with the temperature set by the controller, and according to the...

AI Technical Summary

Problems solved by technology

If the measured temperature does not reach the set temperature, the thermostat will give an open valve signal to the electric valve, the valve open contact of the electric valve will be connected, and the valve will open; when the filter screen is blocked or when it exceeds the specified value, the differential pressure switch will switch signal; when the temperature of the coil is too low, the low-temperature antifreeze switch will give a switch signal, and the fan will stop running to prevent the coil from freezing and cracking; however, in the cold and sandy areas of northern China, the heating coil of the fresh air unit on the ceiling is often cracked by freezing. The main reason is that the fluid in the heating coil is affected by the cold wind, and when the fluid in the heating coil solidifies, the volume expands, which eventually causes the heater coil to burst, which not only affects the normal operation of the fresh air unit, but also increases the maintenance of equipment and the operation of users. Management costs have also affected the promotion and application of ceiling fresh air systems in cold regions of China to a certain extent. In the past, the operation of ceiling fresh air units in winter was as follows: outdoor fresh air was directly sent into the room through the fresh air unit without effective control. Due to the temperature difference between indoor and outdoor Larger, it is more likely that the heater pipe of the fresh air unit will be frozen and cracked, or it is based on the electric heating antifreeze method, but when the electric heater is damaged in this method in actual application, the heater pipe of the fresh air unit will still be cracked by freezing accident, so it is urgently necessary to design an antifreeze fresh air unit, based on this, the present invention designs a winter antifreeze ceiling fresh air unit system to solve the above problems

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