Ventilation control cabinet, features and main characteristics

To start the air exchange system, a ventilation control cabinet is used, which is very easy to use. Its operation is possible with various types of ventilation equipment. When choosing a technical device, one should be guided by the parameters, and also take into account the operating conditions and goals.

Destination

The smoke exhaust fan control cabinet increases safety requirements during operation of ventilation units, while maintaining the temperature and humidity conditions. With the help of the equipment located in it, it is easy to establish a constant air velocity and maintain this indicator at a certain level.

Ventilation systems are used to equip production sites where it is required to maintain optimal environmental performance, including the provision of air purification from fine particles and dust. The purpose of the cabinet is the placement of functional elements that provide ventilation.

Possible options for an automatic shield for ventilation systems:

water heated;
with electric heating;
with minimization of harmful components in the air of the working area or recovery;
with the function of purification and subsequent use of air exhaust or recirculation;
providing smoke-free working conditions;
supply, exhaust or supply and exhaust systems.

The cabinet operates in summer or standby modes. The first mode, the outdoor temperature is not controlled. In the event of a drop in air temperature, the protection mode is automatically supplemented by a supply.

What patterns are found

The manufacturer today offers models of ventilation control cabinets in the range:

smoke control and ventilation control units. Designed for automatic smoke removal, control of climate sensors and other systems. It has a transformer inside for converting currents, buttons for disconnecting in emergency situations. With its help, control over rising temperatures and smoke is carried out;
power and ventilation control panels. The devices are multifunctional, designed for operation of suspended and floor ventilation units. They are also used for water cooling, protection against overheating from electrical installations, water heating and freon cooling;
shields for supply and control of supply and exhaust ventilation with a recuperator made with glycol. This is a freely programmable controller equipped with temperature sensors, dampers from the external environment, protection against condensation, heaters from heating the electric network, and circulation pumps. In the design there are many locks from elevated temperatures and freezing, from emergency situations and other incidents;
with a plate recuperator. The ventilation control cabinet can be set up without any problems. It is equipped with special dampers from outside temperatures, a water heater and cooler, an electric heater, pumps for air recirculation, a compressor and a condensing device.

In industrial sectors, equipment that cannot be turned on without turning on ventilation devices, such as grinding machines, is often found.

Cabinet with smoke exhaust valves

Ventilation control

Air handling unit control

Materials of manufacture

When designing the design of the ventilation system equipment, operating conditions are taken into account in which they will operate smoothly. The interior of the cabinet is rarely installed outside the panel.

When developing a project, it is taken into account:

ambient temperature at work. If the temperature conditions are not observed, then the performance will be degraded. The material will quickly melt, wear out, and the power equipment placed inside will become worthless;
Humidity conditions must also be ensured within the normative indicators so that short circuits do not occur on electrical parts;
providing altitude relative to sea level. This indicator affects the forced ventilation device, since the heat transfer conditions deteriorate when the atmospheric pressure parameters change.

When installing the equipment, the environment inside the cabinet, in comparison with the external indicators of air, changes. According to the results of the research, cabinets for equipping ventilation systems with opening covers are produced. But they often use the current air conditioning standards for the relevant external operating parameters, while taking into account:

working temperature;
temperature indicators inside the cabinet and outside the technical device;
indicator of the radiated power of the equipment;
set altitude above the Baltic Sea.

When choosing a material, one should take into account data on the dimensions of the designed cabinet, type of installation, and then select one of the existing materials, set the height relative to sea level, taking into account the indicators of the external environment and the rated power that is 5% higher than the nominal one.

Basic elements of filling

The manufacturer today offers cabinets for ventilation control in a wide range. The ventilation automation cabinet is arranged as follows:

A private converter is a device for changing the input parameters of the frequency characteristics at the output, that is, the fan and motor blades change speeds, which contributes to a smooth start of the engine. In this case, there is no overload in either manual or automatic mode;
multiprocessor controller - the work is carried out due to the embedded memory card. In turn, they are divided into analog and discrete. In the former, the memory capacity replaces from 10 to 30 units compared to the second controllers;
switch - to turn off the device at the end of work;
starters - structural elements for starting the ventilation system;
automatic machines are switching devices for switching currents on or off in an electric circuit or out of a circuit. In the event of deviations of the technological process, for example, a short circuit, they are used to disconnect;
contactor - an electromagnetic mechanism designed to enable or disable equipment remotely;
mechanisms for protection - devices against possible unforeseen situations;
relay - serves to close or open the circuit during the operation of the device;
indicators of operating modes are light. They emit bright light and provide control over the operation of the ventilation system during the execution of production tasks.

The control panel of the smoke exhaust fans is simple in design and convenient during operation, during repair work and during maintenance.

How to position

To ensure the smooth operation of ventilation systems, you need to know some of the nuances of placing a technical device.

The location rules are as follows:

the equipment is designed for uninterrupted operation; during operation, the temperature range from - 10 C to +55 C should be taken into account. These parameters should not go beyond;
the cases of smoke control cabinets and other devices for the operation of ventilation systems are made of plastic or metal. The degree of protection of the first IP 45, where IP is the internal protection, the number "4" indicates the ability to protect the case from solid bodies of sizes exceeding 1 mm, and pieces of wire, metal hardening from tools of at least 1 mm. The designation of the number "5" - means that water at a pressure at any angle will not penetrate into the cabinet;
the technical device is designed for voltage parameters from 220 V to 380 V;
private current characteristics are 50 Hz;
the cabinet controlling the operation of ventilation is installed in places where increased humidity is excluded, there are no sources of heat, dust formation, and there is no exposure to aggressive chemicals.

It is impossible to carry out installation work in areas of radiation and magnetic radiation, in places of direct sunlight and radio interference. Ideal places for installation will be the specialized rooms of the control room or electrical panel. After completing installation work, be sure to ground the cabinet with a special device.

Work on the installation of a ventilation system control cabinet should be carried out in accordance with the developed, agreed and approved project on the basis of current rules.