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Current control method, current control system and air conditioner

A current control and air conditioner technology, applied in heating and ventilation control system, heating and ventilation safety system, control input related to air characteristics, etc., can solve the problem of air conditioner shutdown of damaged power modules, affecting user use, power module temperature rise, etc. question

Active Publication Date: 2017-08-25
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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  • Application Information

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Problems solved by technology

The operating current of the inverter air conditioner is different in different working environments, and the operating current of the air conditioner is also different under different operating voltages, especially in the case of low voltage, the current of the inverter air conditioner will increase rapidly; when When the operating current of the inverter air conditioner increases, the temperature of the power module of the inverter air conditioner will rise, reaching or exceeding the module protection temperature point, which will cause damage to the power module or shutdown of the air conditioner, affecting the use of users

Method used

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  • Current control method, current control system and air conditioner
  • Current control method, current control system and air conditioner
  • Current control method, current control system and air conditioner

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specific Embodiment

[0071] When the air conditioner is in cooling operation, if the ambient temperature is 40°C, query the initial value of current I corresponding to cooling in the preset database max , determine the current correction coefficient C corresponding to 40°C 1 , corresponding to the refrigeration mode and the maximum current for safe operation of the compressor at the current ambient temperature is I max ·C 1 , when it is detected that the compressor operating current I is greater than I max ·C 1 , control the compressor at the first rate V 1 Reduce the working speed to the first speed N 1 , at the first speed N of the compressor 1 Run for the first time T 1 , at the second rate V 2 Increase the working speed to the current safe running maximum current I max ·C 1 Corresponding maximum safe speed N max .

[0072] figure 2 A schematic flowchart of a current control method according to yet another embodiment of the present invention is shown.

[0073] Such as figure 2 A...

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Abstract

The invention provides a current control method, a current control system and an air conditioner. The current control method is used for the air conditioner and comprises the following steps: determining the maximum current value, which corresponds to the environmental temperature of an environment where the air conditioner is placed, of a compressor in the air conditioner and operation current of the compressor; if the operation current is greater than the maximum current value, controlling the working rotating speed of the compressor to be reduced to a first rotating speed at a first rate; and after the compressor operates for a first time length at the first rotating speed, increasing the working rotating speed at a second rate till the rotating speed reaches the maximum safety rotating speed. According to the technical scheme provided by the invention, when the operation current detected of the compressor is greater than a safety range, the operation current of the compressor is reduced to be within the safety range; and after temperatures of a power module and an element for controlling a computer board are reduced to be within the safety range, the compressor operates at the maximum power, so that the system reliability of the air conditioner is improved, the refrigeration effect of the air conditioner is enhanced, and the user experience is increased.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to a current control method, a current control system and an air conditioner. Background technique [0002] At present, with the improvement of living standards, frequency conversion air conditioners are widely used. The operating current of the inverter air conditioner is different in different working environments, and the operating current of the air conditioner is also different under different operating voltages, especially in the case of low voltage, the current of the inverter air conditioner will increase rapidly; when When the operating current of the inverter air conditioner increases, the temperature of the power module of the inverter air conditioner will rise, reaching or exceeding the module protection temperature point, which will cause damage to the power module or shutdown of the air conditioner, affecting the use of users. Contents of the invention [0003] The p...

Claims

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Application Information

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IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/70F24F2110/00Y02B30/70
Inventor 邓谷城贺伟衡洪伟鸿
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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