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Temperature precision control method for frequency conversion refrigerator

A variable frequency refrigerator, precision control technology, applied in household refrigeration equipment, lighting and heating equipment, household appliances, etc., can solve the problems of large temperature fluctuations, no energy saving, shortened preservation time, etc., to achieve reduced temperature overshoot, constant temperature, Energy Saving Effect

Active Publication Date: 2014-03-05
四川长虹空调有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the accuracy of the existing refrigerator temperature sensor is ±0.5°C, and the frequency of the compressor is adjusted with a frequency change rate of 1Hz.
Therefore, there are two problems in the existing refrigerator control: 1. The temperature control accuracy cannot be further improved, which is not conducive to food preservation
For example, the best storage temperature for chilled fresh meat is 0°C to 1°C, and the existing control can easily exceed this temperature range, which will shorten the preservation time; 2. When the temperature close to the target is in the range of 0.5°C, because the sensor is not sensitive to temperature changes, The frequency of the compressor cannot be lowered in time, resulting in temperature overshoot, causing large temperature fluctuations and not saving energy

Method used

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  • Temperature precision control method for frequency conversion refrigerator
  • Temperature precision control method for frequency conversion refrigerator
  • Temperature precision control method for frequency conversion refrigerator

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Embodiment

[0030] Assuming that the user sets the target temperature of the refrigerator to 7°C, the temperature sensor model used is Hokuriku’s 150-202-97006, and it is stipulated that when the difference between the target temperature and the measured temperature is △T≤1°C, it will enter the fine adjustment mode , the frequency conversion refrigerator fuzzy control table used is shown in Table 1:

[0031] Table 1 Fuzzy control table of frequency conversion refrigerator of the present invention

[0032]

[0033]

[0034] Among them, NS: the frequency of the compressor is slightly reduced, such as 5Hz; NM: the frequency of the compressor is reduced by a small amount, such as 10Hz; PS: the frequency of the compressor is slightly increased, such as 5Hz; PM: the frequency of the compressor is increased by a large amount, such as 10Hz; ZE: The compressor frequency increment is 0, that is, the frequency remains unchanged; NS1: The compressor frequency is slightly reduced, such as 0.1Hz;...

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Abstract

The invention relates to refrigeration technologies, in particular to a temperature precision adjusting method for a refrigerating chamber or a chilling chamber of a frequency conversion refrigerator. The main technical scheme of the control method is that first temperature detecting resolution of the refrigerator is improved, different adjusting method are adopted according to different temperature ranges, a fine adjusting method is adopted when the temperature is close to the target temperature, a compressor is operated at lower frequency so that the temperature cannot go too far to overshoot, so that the precision temperature adjusting control is achieved. The temperature precision control method for the frequency conversion refrigerator has the advantages of being capable of detecting the temperature variation of 0.1 DEG C in the refrigerating chamber or the chilling chamber in real time, performing fine adjustment on the compressor at low frequency, enabling the temperature to be constant, lowering the frequency of the compressor in time when the temperature is close to the target temperature, reducing temperature overshoot, and saving energy. The temperature precision control method is particularly suitable for the frequency conversion refrigerator.

Description

technical field [0001] The invention relates to refrigeration technology, in particular to a method for precisely adjusting the temperature of a refrigerator compartment and a freezer compartment of an inverter refrigerator. Background technique [0002] At present, the frequency conversion refrigerator is equipped with a temperature sensor in the refrigerator compartment or the freezer compartment to detect the temperature in the refrigerator compartment or the freezer compartment. There are many methods for controlling the temperature of existing inverter refrigerators, but the basic idea is that the control device of the refrigerator controls the temperature in real time according to the actual measured temperature and the target temperature of the refrigerator or freezer, the difference between the target temperature and the actual measured temperature, and the cooling speed. The operating frequency of the inverter compressor can avoid frequent startup and shutdown of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25D29/00
Inventor 李越峰邓健
Owner 四川长虹空调有限公司
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