Control method for frequency fluctuation of compressor, air conditioner and storage medium

A compressor frequency and control method technology, which is applied in the field of compressors, can solve the problems of increased air-conditioning load, high pressure, and affecting the reliability of air-conditioning, and achieve the effect of increasing accuracy and improving operating frequency

Active Publication Date: 2022-04-22
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But on the other hand, due to the harsh working conditions, the load of the air conditioner increases after high frequency operation, and the pressure becomes higher, which affects the reliability of the air conditioner.

Method used

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  • Control method for frequency fluctuation of compressor, air conditioner and storage medium
  • Control method for frequency fluctuation of compressor, air conditioner and storage medium
  • Control method for frequency fluctuation of compressor, air conditioner and storage medium

Examples

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no. 1 example

[0029] see figure 1 , figure 2 In a specific embodiment, a control method for compressor frequency fluctuation of an air conditioner, the control method includes:

[0030] S100. Detect the working state of the compressor, and obtain a state detection result;

[0031] S200, changing the operating frequency of the compressor according to the state detection result;

[0032] S300. Change the rate of change of the working frequency according to the changing range of the working frequency.

[0033] In this embodiment, the air conditioner is used for cooling or heating, and the air conditioner includes a compressor, which is located outdoors and is a core component. There can be multiple frequency-up phases of the compressor, and multiple frequency-up phases can be included in one compressor. The change of compressor frequency affects the operation of the air conditioner. The control method in this embodiment can control the compressor with multiple frequency-up phases. machine...

no. 2 example

[0038] In a specific embodiment, the working state of the compressor is detected, and the state detection result is obtained, including:

[0039] S110. In the first period, detect and obtain the first pressure value of the compressor;

[0040] S120. Comparing the first pressure value with a high pressure limit value;

[0041] Wherein, in the first cycle, when the first pressure value is greater than the high-pressure limit value several times, the operating frequency of the compressor is controlled to change.

[0042] Detect the working frequency of the compressor when the compressor is working, and calculate the working pressure of the compressor according to the working frequency to obtain the first pressure value. Further, compare the first pressure value with the high pressure limit value, and in the first cycle , when the first pressure value is higher than the high-pressure limit value for two times, the high-pressure frequency limiting function starts, and the first pr...

no. 3 example

[0047] In a specific embodiment, according to the state detection result, changing the operating frequency of the compressor also includes:

[0048] S210. Detect and compare the pressure in the protection down-frequency period to obtain the minimum pressure value P min ;

[0049] S220. Detect and protect the frequency of the compressor in the down-frequency period, and obtain the highest frequency value f max and the lowest frequency value f min ;

[0050] S230. Calculate the frequency change rate K of the compressor according to the time of the protection down-frequency cycle;

[0051] Wherein, the duration of the protection down-frequency period is T, and the calculation formula of the frequency change rate K is: K=2(f max -f min) / T.

[0052] In this embodiment, when the compressor triggers the high-pressure frequency-limiting function, the frequency of the compressor is forcibly reduced. The pressure change is caused by the frequency change of the compressor. At this...

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Abstract

The invention relates to the technical field of compressors, in particular to a control method and device for frequency fluctuation of an air conditioner compressor. The problem of how to control the working frequency of the air conditioner at the frequency reduction triggering edge is solved. In order to solve the problem, the embodiment of the invention provides the control method for the frequency fluctuation of the compressor of the air conditioner, and the control method comprises the following steps: detecting the working state of the compressor to obtain a state detection result; changing the working frequency of the compressor according to the state detection result; and changing the change rate of the working frequency according to the change amplitude of the working frequency.

Description

technical field [0001] The present invention relates to the technical field of compressors, in particular to a control method and a control device for frequency fluctuation of an air conditioner compressor. Background technique [0002] When the air conditioner is operating in relatively bad working conditions, on the one hand, because the set temperature is not reached, the compressor will be required to increase the frequency and run at high frequency to obtain higher cooling and heating capacity. But on the other hand, due to the harsh working conditions, the load of the air conditioner increases after high frequency operation, and the pressure becomes higher, which affects the reliability of the air conditioner. At this time, some frequency reduction protection is generally set. When the load increases to a certain level, the frequency is limited to increase, or even gradually reduce the frequency, and finally the frequency of the air conditioner runs on the edge of trig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/32F24F11/61F24F11/64F24F11/86F24F11/88F24F140/12
CPCF24F11/32F24F11/61F24F11/64F24F11/86F24F11/88F24F2140/12Y02B30/70
Inventor 杨东林陈冬任小辉黄春黄昌伟
Owner NINGBO AUX ELECTRIC
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