Method and system for controlling frequency conversion load speed of refrigerator
A technology of load speed and control method, which is applied to household refrigeration devices, lighting and heating equipment, household appliances, etc., can solve the problems of fuzzy gear control, the temperature of food cannot be lowered in time, and the feeling of use of food is affected, so as to achieve precise control. effect of temperature
Active Publication Date: 2021-10-01
WHIRLPOOL CHINA
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Problems solved by technology
[0003] However, at present, the refrigerator generally controls the frequency conversion load through fuzzy gears to keep the refrigerator compartment within a target range. The frequency conversion load can only be adjusted to the corresponding speed according to the preset frequency range, which often makes the temperature of the refrigerator too high or too low, and then slowly approaches the target temperature, resulting in the food temperature not being lowered in time or being too low to affect the food. sense of use
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[0045] In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.
[0046] Such as figure 1 As shown, this embodiment discloses a method for controlling the frequency conversion load speed of a refrigerator, which includes the following steps:
[0047] S101. Obtain the actual temperature of the refrigerator at the current moment through the refrigerator sensor, and calculate the deviation value between the actual temperature of the refrigerator at the current moment and the set temperature;
[0048] S102. Calculate the rotational speed PI control amount according to the ratio of the deviation value to the set full-scale variation range and the integral of the sampling time;
[0049] S103. Control the rotation speed of the ...
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The invention discloses a refrigerator frequency conversion load rotation speed control method and system, belonging to the technical field of refrigeration equipment, including obtaining the current actual temperature of the refrigerator through a refrigerator sensor, and calculating the deviation value between the current actual temperature and the set temperature of the refrigerator; According to the ratio of the deviation value to the set full-scale variation range and the integral of the sampling time, the rotational speed PI control quantity is calculated; and the rotational speed of the refrigerator compressor and / or fan is controlled according to the rotational speed PI control quantity. In the present invention, the difference between the actual temperature of the refrigerator compartment and the control temperature to be achieved is used as the input of PI control, and the PI (proportional integral) control request output is calculated for the temperature difference and the time integral of the difference, so that The actual temperature of the refrigerator compartment reaches the set control temperature quickly and accurately, and can maintain the required temperature continuously without external interference.
Description
technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a method and system for controlling the rotational speed of a refrigerator with variable frequency load. Background technique [0002] Refrigerator frequency conversion technology is aimed at the refrigerator compressor. The speed of the refrigerator compressor is not fixed. When the ambient temperature is high, the compressor speed is accelerated to achieve the purpose of cooling as soon as possible. When the ambient temperature is low, the compressor speed is slowed down to maintain the temperature. Use under different ambient temperature and different load conditions. [0003] However, at present, the refrigerator generally controls the frequency conversion load through fuzzy gears to keep the refrigerator compartment within a target range. The frequency conversion load can only be adjusted to the corresponding speed according to the preset frequency range, wh...
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IPC IPC(8): F25D29/00
CPCF25D29/00F25D2700/12
Inventor 王振濮张燕李嘉琪
Owner WHIRLPOOL CHINA