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Main technical indexes of vacuum cleaner
- Jun 24, 2018 -

Main technical indexes of vacuum cleaner

The indexes is applied to all kinds of vacuum cleaner, such as wet and dry vacuum cleaner, ash cleaner, pond vacuum cleaner, carpet vacuum cleaner, all household vacuum cleaner, etc.


1, electrical performance: power supply voltage: volt; frequency: Hertz; input power: P1, unit: W.

2. Air performance:

Air volume Q

Unit m3/minSticker 1.5m3/minCanister 2m3/min

Vacuum Hs

Unit Pa

Inhaled power P2

Unit WP2=16.67*10-3HS·Q

Efficiency n



3. The air performance curve: for example.


HS: vacuum degree Pa, P1 - input power W, P2 - output power W, inhalation efficiency%, Q - air volume m3/min


In the air performance curve we can see:

HS - Q curve: when the intake air volume (Q value) is getting larger and larger, the vacuum (HS) becomes smaller and smaller. When the HS is small to zero, the air volume reaches the maximum. When the minimum air volume is zero, the vacuum degree reaches the maximum.

It can be seen from the curve that the air volume and vacuum degree of vacuum cleaner are all variables. The air volume is small, and vice versa. When the suction inlet of the vacuum cleaner is completely blocked, the vacuum degree can reach the maximum value, and the maximum value of the air volume is also opened when the suction port is opened. We usually point out that the vacuum and air volume of the vacuum technology indicators should be the maximum.

P1 curve: the input power curve of the vacuum cleaner, with the increase of air volume (the suction nozzle from the full to full open), the input power is gradually increased, this is because the suction port is completely blocked when no air can be inhaled, the fan motor of the vacuum cleaner has an approximate vacuum state, so the input power is minimal. The intake volume is the largest when the intake port is full, and the input power should be larger. The difference between the two is large, usually in the 50-150W, the random type varies. In peacetime, the input power of the vacuum cleaner is not the maximum power (that is, the power at the full opening), and it is not the minimum power, but the average power.

The input power of vacuum cleaner = (input power at full suction port + input power when suction port is blocked) 2

The power of the vacuum cleaner marked on the nameplate refers to the average power.

Although the input power of the vacuum cleaner mainly depends on the power of the motor, there are many factors affecting the input power, that is, a 1500W motor is loaded into the vacuum cleaner and will be lower than 1500W, and the range of the change is still relatively large. The difference between full opening and full closing of suction port is also an uncertain factor. It can be generally considered that the whole air duct of the vacuum cleaner is not smooth, there is air leakage, and the insufficient inlet and outlet section can affect the size of the input power. Therefore, in the same specification, the input power of the same batch of vacuum cleaner varies in a certain range because of the technological conditions of the motor and the production process of the vacuum cleaner. Our company stipulates the allowance of about 15% of the difference. Countries in the world also regulate the range of input power in terms of safety rules, such as the US UL is + 1015%, Europe is +15%, and there is no negative.

According to these regulations, the input power of the actual product can be between 1650W-1275W, as long as the range of power allowances in the specified country is allowed, such as the vacuum cleaner that is sold to the American nameplate power of 1500W.

The P2 curve is the curve of the change in the output power of the vacuum cleaner.  The output power of the vacuum cleaner is reflected by the vacuum and air volume. Generally speaking, the vacuum is high and the output power of the air volume will be high. The formula is:

Output power formula: P2=16.67 x 10-3HSQ (W)

HS: vacuum degree of the vacuum cleaner, unit Pa,

Q: the air volume of the vacuum cleaner, unit m3/min

During the use of the vacuum cleaner, the vacuum degree HS and the air volume Q constantly change according to the HS - Q curve, so the output power stipulated in the technical standard is the maximum power, that is, the vertex of the P2 curve. It is important to note that the maximum output power is not the product of the maximum vacuum and maximum air volume of the vacuum cleaner, and the air performance curve can be observed. When the true space is maximum, the air volume is zero and the output power is zero.

The efficiency of the vacuum cleaner is (= the output power of the vacuum cleaner P2, the vacuum cleaner's input power P1) * 100%

Of course, P1 and P2 are changing. Efficiency n should also be the vertex of curve, that is, the maximum. The efficiency of vacuum cleaner is generally 28%-32%, which is because the air flow in vacuum cleaner has great resistance and reduces air volume. The resistance is mainly the filter system and the air duct inside the vacuum cleaner, and the efficiency of the vacuum motor itself is about 40%.

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