CN106288135A - The method of adjustment of the rotation speed of fan of air-conditioning - Google Patents

Abstract

The present invention provides a method for adjusting the fan speed of an air conditioner, which includes: detecting the current static pressure value of the air conditioner; Find the corresponding fan speed value based on the air volume and the current static pressure value; control the fan to run according to the found fan speed value. The method for adjusting the air output volume of the air conditioner to maintain the static pressure provided by the present invention adjusts the fan speed through the current value of the air conditioner motor to ensure the air output volume of the air conditioner, avoids the error of manual adjustment, and also avoids the need to reset each time the air outlet is increased or decreased. fixed question.

Description

How to adjust the fan speed of the air conditioner

technical field

The invention belongs to the field of air conditioner adjustment, and in particular relates to an adjustment method for a fan speed of an air conditioner.

Background technique

At present, the air conditioner indoor unit or outdoor unit needs to be connected to the air duct. The length of the air duct is different, and the static pressure it bears is different. Because the speed of the fan is fixed, the air output is the same, but because of different installation environments, the length of the air duct is different, resulting in different static pressure, so the air output of different air ducts will have a certain attenuation, which results in a longer air duct. The cooling effect of the whole air conditioner is relatively poor. At present, the major manufacturers are setting the fixed speed of 3 or 4 gears. When the static pressure is different, the wind speed is manually set to adjust the air volume and make up for the attenuation. However, this method is more troublesome to set, and the air duct installed on site The impact of length on static pressure is judged by human feeling, and the air volume cannot be adjusted correctly, and has the following disadvantages:

1. Manually set the wind speed according to the static pressure, the setting method is cumbersome. (Most machines are installed in the ceiling)

2. The judgment of static pressure is inaccurate, the speed of fan is not suitable, and sometimes noise will be generated.

3. After increasing or decreasing the air outlet, the air volume cannot be controlled.

Contents of the invention

Therefore, the present invention provides an air conditioner fan speed and static pressure adjustment method that can automatically determine the static pressure change according to the change of the motor current, and then adjust the fan speed to ensure the air output.

A method for adjusting the fan speed of an air conditioner, comprising:

Detect the current static pressure value of the air conditioner;

Find the corresponding fan speed value according to the current set air volume and the current static pressure value in the pre-established relationship between the static pressure value and the fan speed value under various air volume conditions;

Control the fan to run according to the found fan speed value.

The air conditioner is controlled to operate in a standard mode, and the relationship between the static pressure value and the fan speed is measured.

The current static pressure value is calculated according to the current value of the compressor motor, and the formula is:

Static pressure value = (motor current value-1)/10;

Wherein, the error value is ±0.1.

The conversion formula between the static pressure value and the fan speed is:

Fan speed = static pressure coefficient × static pressure value.

The static pressure coefficient is calculated according to the following formula:

Static pressure coefficient=K*2*π*R*L, where R is the radius of the air duct, L is the length of the air duct, and K is a constant.

The Changshu K ranges from 1 to 5.5.

The air output volume of the air conditioner is inversely proportional to the static pressure value.

The "standard mode" mentioned in the present invention means that the length of the air outlet pipeline configured by the air conditioner is a fixed value, preferably 1 meter.

The method for adjusting the air output volume of the air conditioner to maintain the static pressure provided by the present invention adjusts the fan speed through the current value of the air conditioner motor to ensure the air output volume of the air conditioner, avoids the error of manual adjustment, and also avoids the need to reset each time the air outlet is increased or decreased. fixed question.

Description of drawings

Fig. 1 is the flowchart of the method for adjusting the fan speed of the air conditioner provided by the present invention;

Fig. 2 is an embodiment of the method for adjusting the fan speed of the air conditioner provided by the present invention;

Fig. 3 is a graph showing the relationship between the static pressure value and the current value of the method for adjusting the fan speed of the air conditioner provided by the present invention.

detailed description

The present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

A method for adjusting the fan speed of an air conditioner, comprising:

Detect the current static pressure value of the air conditioner;

Find the corresponding fan speed value according to the current set air volume and the current static pressure value in the pre-established relationship between the static pressure value and the fan speed value under various air volume conditions;

Control the fan to run according to the found fan speed value.

The air conditioner is controlled to operate in a standard mode, and the relationship between the static pressure value and the fan speed is measured.

The current static pressure value is calculated according to the current value of the compressor motor, and the formula is:

Static pressure value = (motor current value-1)/10;

Wherein, the error value is ±0.1.

The conversion formula between the static pressure value and the fan speed is:

Fan speed = static pressure coefficient × static pressure value.

The static pressure coefficient is calculated according to the following formula:

Static pressure coefficient=K*2*π*R*L, where R is the radius of the air duct, L is the length of the air duct, and K is a constant.

The Changshu K ranges from 1 to 5.5.

The air output volume of the air conditioner is inversely proportional to the static pressure value.

When the speed of the air conditioner is constant, the static pressure increases, the air output of the air conditioner decreases, and the power of the air conditioner increases, as shown in the following table:

Test static pressure RPM 960 air volume power 0.5 960 13659 1320 9.9 960 13542 1320 20.2 960 13347 1390 30 960 12979 1350 40.2 960 12653 1420 50 960 12359 1450 60.1 960 12092 1480 70 960 11754 1550 80 960 11414 1630 90 960 11106 1560 99.3 960 10669 1620 109.7 960 10314 1720

Therefore, the air output volume of the air conditioner can be adjusted by judging the static pressure at the air outlet of the air conditioner, but the static pressure is not easy to be measured, and the static pressure at the air outlet of the air conditioner has the following relationship with the motor current value of the air conditioner:

Test static pressure RPM 960 electric current 0.5 955 2.79 9.9 960 2.76 20.2 960 2.9 30 960 2.95 40.2 960 2.99 50 960 3.02 60.1 960 3.07 70 960 3.21 80 960 3.36 90 960 3.24 99.3 960 3.35 109.7 960 3.54

That is, under the condition of keeping the rotation speed constant, the static pressure value at the air outlet of the air conditioner is proportional to the motor current value,

As shown in Figure 3, the relationship diagram between the static pressure value and the current value, the calculation formula is:

Static pressure value = (motor current value-1)/10;

That is, when the obtained current value changes, the static pressure value will also change, which means that the air volume changes. In order to keep the air volume constant, the fan speed needs to be increased, as shown in the following table:

Table-Comparison of air volume for adjusting speed under different static pressures

On the premise of ensuring a certain air volume, according to the change of the current, select the fan speed corresponding to the changed current, and adjust the fan to achieve the purpose of ensuring the air volume.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (7)

1. A method for adjusting the fan speed of an air conditioner, characterized in that: comprising: Detect the current static pressure value of the air conditioner; In the pre-established relationship between the static pressure value and the fan speed value under various air volume conditions, according to the current set air volume and the current static pressure value, find the corresponding fan speed value; Control the fan to run according to the found fan speed value. 2. The adjustment method according to claim 1, characterized in that: the air conditioner is controlled to operate in a standard mode, and the relationship between the static pressure value and the fan speed value is measured. 3. The adjustment method according to claim 1, characterized in that: the current static pressure value is calculated according to the current value of the compressor motor, the formula is: Static pressure value = (motor current value-1)/10; Wherein, the error value is ±0.1. 4. The adjustment method according to claim 1, characterized in that: in the relationship, The static pressure value and the fan speed are determined according to the following conversion formula: Fan speed = static pressure coefficient × static pressure value. 5. The adjustment method according to claim 4, characterized in that: the static pressure coefficient is calculated according to the following formula: Static pressure coefficient=K*2*π*R*L, where R is the radius of the air duct, L is the length of the air duct, and K is a constant. 6. The adjustment method according to claim 5, characterized in that: the range of the constant K is 1-5.5. 7. The adjustment method according to claim 1, characterized in that: the air output volume of the air conditioner is inversely proportional to the static pressure value.