Refrigeration plant control method

Abstract

The invention discloses a refrigeration equipment control method. The refrigeration plant is provided with an inverter compressor and at least one refrigeration compartment. The inverter compressor is provided with N frequency conversion gears. The corresponding rotate speed of frequency conversion gear of gear I is Si, I = 1, 2, ... N. The control method comprises that S1 is to determine an initial speed R0 of the inverter compressor, S2 is to determine the revision frequency conversion speed difference of the inverter compressor according to the actual temperature of the refrigeration compartment and the setting temperature associated with the refrigeration compartment and S3 is to compare the sum of the initial speed R0 and the revision frequency conversion speed differences with the speeds corresponding to gears of the inverter compressor to obtain the required operating gear to operate the inverter compressor at the operating gear and operate S2 continuously. The refrigeration plant control method sets a plurality of gears of the compression engine of the refrigeration plant; the frequency conversion of the compression engine can be effectively controlled. According to the actual using requirements, the rotate speed of the compressor engine can be reasonably adjusted, thereby the refrigeration efficiency is enhanced, good refrigeration effect is ensured and the power consumption of the refrigeration plant is lowered.

Description

technical field [0001] The present invention relates to the technical field of refrigeration equipment, in particular to a control method for refrigeration equipment. Background technique [0002] In the prior art, the frequency conversion control of the compressor of the refrigeration equipment mainly adopts the following control methods: 1. Control the speed of the refrigerator compressor according to the ambient temperature; 2. Control the speed of the compressor according to the set temperature; Speed; 4. Combining the above 3 points to control the compressor speed, there are mainly the following shortcomings: 1. The control method is relatively simple, and the compressor speed cannot be adjusted according to the actual use of refrigeration, and there is no "frequency conversion" of the frequency conversion compressor. Effect; 2. The speed of the control rule is relatively fixed, and the variable frequency compressor cannot be well controlled to perform "frequency conver...

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Problems solved by technology

[0002] In the prior art, the frequency conversion control of the compressor of the refrigeration equipment mainly adopts the following control methods: 1. Control the speed of the refrigerator compressor according to the ambient temperature; 2. Control the speed of the compressor according to the set temperature; Speed; 4. Combining the above 3 points to control the compressor speed, there are mainly the following shortcomings: 1. The control method is relatively simple, and the compressor speed cannot be adjusted according to the actual use of refrigeration, and there is no "frequency conversion" of the frequency conversion compressor. Effect; 2. The speed of the control rule is relatively fixed, and the variable frequency compressor cannot be well controlled to perform "frequency conversion". As a result, when the temperature difference between the set temperature and the actual temperature is large, the compressor speed is low and the cooling speed of the food is slow. When the temperature difference between the temperature and the actual temperature is small, the compressor speed is high and the actual power consumption is large, so the effect of energy saving and fast cooling achieved by the inverter compressor through frequency conversion cannot be exerted; 3. The opening and closing of the door can only indirectly reflect the opening of the refrigerator door The effect on the cooling demand cannot accurately reflect the actual temperature change of the refrigeration equipment

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