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Method and system for detecting dust retention and air conditioner adopting method

A technology for dust accumulation and air conditioning, which is applied in the heat dissipation of air conditioners, a method of detecting dust accumulation and its system field, which can solve the problems of air conditioner heat exchange capacity decline, inability to truly achieve intelligent control, single control method, etc., to achieve the method Reliable, improve heat dissipation performance, avoid wind shear noise effect

Inactive Publication Date: 2015-07-29
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] If the air conditioner is used for a long time, there will be a lot of dust on the condenser. If the dust is not cleaned for a long time, the heat exchange capacity of the air conditioner will be reduced, the energy efficiency ratio will be reduced, and unnecessary waste will be caused.
Therefore, in order to improve user comfort and system reliability, some manufacturers have used automatic cleaning devices for air-conditioning condensers, but the current control method is relatively simple, and it can only be a fixed time switch instead of truly intelligent control.

Method used

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  • Method and system for detecting dust retention and air conditioner adopting method

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example 1

[0026] Example 1: Under the same starting conditions, the more dust accumulated, the higher the speed

[0027] For a centrifugal fan, when dust and lint accumulate between the fan and the cooling fins of the condenser, the flow resistance at the fan outlet increases, reducing the air flow through the cooling fins. When the flow resistance of the air outlet increases, the static pressure generated to overcome the air supply resistance increases instead, and the static pressure is proportional to the square of the fan speed. Therefore, under the same input power, the increase of flow impedance (static pressure increase) will increase the fan speed. In other words, with the speed feedback control, to achieve the same speed, only a small input power is needed to maintain the speed of the fan at a predetermined speed. For example: under the condition of natural and unobstructed air intake, if the fan speed reaches 3400rpm, it needs to input a voltage of about 4.1 volts. If a mesh...

example 2

[0028] Example 2: Under the same starting conditions, the more dust accumulated, the lower the speed

[0029] The invention mainly detects the dust accumulation of the fan of the outdoor unit of the air conditioner. The fans of the outdoor unit of the air conditioner are all axial flow fans. In the case of dust accumulation, the speed of the fan will decrease. The air conditioner indoor unit, the relative position of the two fans and the air conditioner heat exchanger and the air supply method are different, so the places where dust accumulates are different. Axial flow fans generally accumulate dust at the air inlet, while centrifugal fans accumulate dust at the air outlet. Simply put, axial fans suck air from the heat exchanger, while centrifugal fans blow air against the heat exchanger.

[0030] For axial flow fans, dust and lint accumulate on the fins of the condenser (at the air inlet), and the flow resistance at the fan inlet increases, reducing the air flow through the ...

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Abstract

The invention relates to a method for detecting dust retention. The method comprises the following steps: 1, starting a fan to enable the fan to rotate at a preset rotating speed to generate airflow to pass through a condenser, and simultaneously transmitting the preset rotating speed value to a controller; 2, detecting an actual rotating speed of the fan and transmitting the actual rotating speed value to the controller; 3, calculating the difference between the actual rotating value and the preset rotating speed value, taking an absolute value of the difference, and judging whether the absolute value is larger than a set value, and if so, sending a dust retention amount alarm signal. The invention also discloses a system for detecting dust retention. The invention also discloses an air conditioner adopting the method for detecting the dust retention. The method and the method disclosed by the invention have the beneficial effects that the method is better in universal performance and accuracy. The increase of extra assemblies cannot be caused, the heat dissipation performance of the condenser can be improved, and the wind shear noise caused by increase of the rotating speed is avoided.

Description

technical field [0001] The invention relates to heat dissipation of an air conditioner, in particular to a method and system for detecting accumulated dust and an air conditioner using the method. Background technique [0002] If the air conditioner is used for a long time, there will be a lot of dust on the condenser. If the dust is not cleaned for a long time, the heat exchange capacity of the air conditioner will be reduced, the energy efficiency ratio will be reduced, and unnecessary waste will be caused. Therefore, in order to improve user comfort and system reliability, some manufacturers have now used automatic cleaning devices for air-conditioning condensers, but the current control method is relatively simple, and can only be a fixed time switch, rather than truly intelligent control. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method and system for detecting accumulated dust and an air conditioner...

Claims

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Application Information

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IPC IPC(8): F24F11/00F24F11/02F24F13/24F28G1/02
CPCF24F11/62F24F11/30F24F11/52F24F11/64F24F11/89F24F13/24F24F2110/00F24F2221/22F28G1/02
Inventor 卜其辉许永锋梁伯启李宏伟蒋运鹏吴晓鸿
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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