According to the performance classification, it is divided into ordinary type and automatic control type.

According to the number of air ducts, it can be divided into single air duct and double air duct.

According to the type of fan, it can be divided into axial flow type and centrifugal type. The structure of the range hood mainly includes an outer shell, an inner shell, a motor, a fan, a key switch, an illuminating lamp, a hood, an oil collecting hood, an oil collecting box and a power cord. 1. housing: including side plate, top plate and mask. It is made of A3 cold-rolled steel plate (partly stainless steel plate) by stamping and welding. The surface is generally phosphatized and sprayed with plastic, so the protective layer is bright and hard, which can resist mildew, moisture and acid and is easy to scrub.

2. Inner shell: In the outer shell, ABS plastic is injected, and there is an arc partition inside, forming a left-right symmetrical spiral cavity, just keeping a certain gap with the fan. When the fan rotates at high speed, due to the centrifugal force, the oil fume is pumped away, and the dirty oil is thrown to the lowest point of the spiral, and then enters and is stored in the oil collection box through the oil guide pipe.

3. Motor: divided into left and right motors, which are capacitor-started motors.

4. Fan: It is the key component of the range hood. The centrifugal fan is installed on the motor shaft and riveted with alloy aluminum plate. Basic concept range hood: also known as range hood, it is a kitchen appliance that purifies the kitchen environment. Installed above the kitchen stove, it can quickly pump away the waste burned by the stove and the oil fume harmful to human body during cooking, reduce pollution and purify the air. At the same time, it has anti-virus and explosion-proof safety functions. The range hood has become a necessary kitchen equipment for modern families. It consists of an outer shell, an inner shell, a motor, a fan, a key switch, an illuminating lamp, a hood, an oil collecting cover, an oil collecting box, a power cord and the like. Technical parameters The power of the range hood is generally between 50 and 80W, and the axial multi-wire range hood has small wind pressure and large air volume. Centrifugal range hood has good separation, high wind pressure, low noise, low temperature rise and long service life. At present, the range hoods on the market are mainly centrifugal. Working Principle After the AC power supply is connected, the left and right motors drive the left and right fans to rotate at high speed, forming a negative pressure area in the center of the fans. After the oil fume enters the negative pressure area, it is accelerated to be discharged from the gap of the fan due to the centrifugal force, and then discharged out of the machine through the public exhaust port. Automatic control range hood: add automatic monitoring circuit to ordinary range hood. When the kitchen fume or combustible harmful gas reaches a certain concentration, the monitoring circuit is automatically started by the sensor and gives an audible and visual alarm, and the range hood pumps the harmful gas out of the machine. Precautions: When used in humid and salty environment, it is easy to leak electricity. Therefore, a three-hole power socket must be configured, and its grounding electrode must be connected with a reliable grounding wire. 1, the outlet of the smoke exhaust pipe should be installed in the downwind direction to avoid being affected by the strong wind outside, and it is forbidden to connect the smoke exhaust pipe to the hot flue.

2. Minimize air convection in the kitchen.

3. When running, don't touch the fan with your hands and don't insert it with hard objects.

When frying, frying and frying, we must pay attention to prevent the flame from being sucked into the machine.

5. When cooking in a pressure cooker, if the safety valve is broken, stop it in time to avoid the spray being sucked into the machine.

6. If the lighting lamp is burnt out, the power of the replaced bulb should not be greater than 40W, otherwise the temperature rise in the machine will be increased and the lighting transparent plate will be burnt. Cleaning and maintenance 1, the power supply must be cut off when cleaning, and live cleaning is strictly prohibited.

2. When the oil collection volume of the oil collection box reaches 2/3, remove it, pour it out, wipe it and reset it.

3. After the gas sensor is used for half a month, remove it and clean it once.

4, the oil on the surface of the casing, can use a soft cloth with neutral cleaning solution, and then wipe with a dry soft cloth.