This section provides an overview for panel heaters as well as their applications and principles. Also, please take a look at the list of 7 panel heater manufacturers and their company rankings.
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A panel heater is a device that protects control panels from condensation and freezing by heating the panels. Many products are a combination of a heater and a fan, and many are used together with a humidity switch that simultaneously reduces humidity. Many products are connected to the control panel, detecting a drop in external temperature, and directing warm air into the control panel to prevent the control panel from freezing, condensation, corrosion, or malfunction, thereby converting the control panel temperature to the optimal temperature for operation.
Panel heaters are used in control panels for equipment that operate in extremely cold environments during the winter. Typical examples include outdoor units of automobiles and air conditioners, control devices for construction equipment, and control panels in factories. When a selecting panel heater`, it is necessary to consider the temperature and humidity zones supported, the volume of temperature that can be changed, the size of the equipment, power consumption, and durability against vibration, etc. If low temperatures are encountered during the winter, installation should be considered to protect the control panel.
The operating principle of panel heaters is explained below. Panel heaters consist of a heat sink, insulator, and current connection terminals. Some products are equipped with a warm-air fan, temperature switch, humidity switch, etc., as accessories. Heat sinks are composed of resistors, and when current flows through them, the heat generated by the resistors generates heat. The areas where current flows are protected by insulators. The heat sinks are designed with a large surface area so that heat can be efficiently spread throughout the control panel by a fan.
During the operation of the panel heater, a signal is sent from the temperature and humidity switches when the temperature inside the control panel reaches a level that could cause condensation or freezing. Based on the signal, the control panel applies an electric current to the panel heaters according to the value of the signal. The heat sink generates heat in proportion to the amount of current. The heat is then spread throughout the control panel by a fan, raising the temperature of the control panel. If there is a humidity switch, the humidity is detected, and a fan is used to ventilate the inside of the control panel to prevent condensation from occurring if the humidity rises too high.
*Including some distributors, etc.
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