Temperature control system cabinet of electric heating box and electric heater

The temperature control system box of the electric heating box and the electric heater (1) The electric heater of the electric oven drying box is usually composed of four heating wires in parallel. The heating wire is uniformly coiled on an insulating plate fired from a refractory material. Generally divided into two groups, controlled by the transfer switch. The total power is (2~4) kW, and the power is up to 8kW. The higher the constant temperature water tank, the larger the cabinet.

(II) Temperature control system The temperature control system used in the early drying oven usually has two types: differential rod type and mercury thermometer type. The temperature control system used in the drying box produced in recent years is mainly composed of temperature sensor, temperature control circuit, relay, temperature setting and temperature display part. (3) Box 1. Case: The outer shell is made of thin iron plate (or thin steel plate). to make. The wall of the water bath oscillator is divided into three layers (including the outer casing). The inner and outer layers are formed between the three layers of iron plates. The outer layer is filled with a heat insulating material (glass fiber or asbestos board), and the inner layer is used as a hot air convection layer.

2. Thermostatic chamber: The space surrounded by the inner iron plate of Zui is called the constant temperature room. There are 2 to 3 mesh shelves in the room for placing items. The temperature sensing portion of the temperature controller (ie, the temperature sensing probe) extends from the left side wall into the constant temperature chamber. A heating wire is placed in the bottom interlayer.

3, the box door: usually double. The inner door is a glass door that is used to observe the baked items with reduced heat loss. The outer door is used for thermal insulation.

4. Inlet and exhaust holes: There is an air inlet hole at the bottom or side, and the dry air enters. The top of the tank has a venting opening, and an adjustable venting window is provided at its outlet, from which the steam escapes. A thermometer is inserted in the center of the exhaust window to indicate the temperature inside the box.

5, side room: for the control room. It is usually located on the left side of the box, and the constant temperature water bath is insulated from the constant temperature room. It is equipped with switches, indicators, temperature controllers, blowers and other electrical components. Opening the side door allows easy access to circuits other than the heating wire.

There are also electric heating boxes that place the control room below the cabinet.