Method and device for controlling inverter compressor

A frequency conversion compressor and control method technology, applied in the field of heating and ventilation, can solve the problems of not being able to adjust the frequency conversion speed according to the actual situation, and unable to realize a fast, energy-saving and stable frequency conversion process at the same time, so as to shorten the cooling time, ensure the stability, The effect of improving cooling efficiency

Inactive Publication Date: 2009-09-23
HAIER GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, no matter what frequency conversion method is used, since the fixed PID parameters are used in the frequency up process, it is only limited to a basically constant frequency conversion speed, and canno

Method used

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  • Method and device for controlling inverter compressor
  • Method and device for controlling inverter compressor
  • Method and device for controlling inverter compressor

Examples

Experimental program
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Example Embodiment

[0034] Example one

[0035] This embodiment combines figure 2 , image 3 with Figure 4 A specific implementation of the control method of the inverter compressor of the present invention is disclosed.

[0036] figure 2 It is a schematic diagram of the control device of the inverter compressor in this embodiment, image 3 It is a flowchart of the control method of the inverter compressor in this embodiment, Figure 4 It is a schematic diagram of the frequency conversion process of the compressor in this embodiment.

[0037] The refrigerant used in the frequency conversion magnetic levitation centrifugal air-conditioning unit is a common refrigerant in the refrigeration industry, and the refrigerant is water or other fluids. The unit compresses the refrigerant to cool the refrigerant first, and then circulates the refrigerant indoors to lower the room temperature, for example Use water as refrigerant, refer to figure 2 As shown, the inverter compressor control device includes: ...

Example Embodiment

[0046] Example two

[0047] This embodiment combines with Figure 5-Figure 7 Another specific implementation of the inverter compressor control method is disclosed. The difference from the first embodiment is that after adjusting the PID parameters in sections, the controller detects in real time whether the temperature change rate exceeds the limit value, and if so, re-assigns the PID parameters until the temperature change rate is lower than the limit value.

[0048] Figure 5 It is a schematic diagram of the control device of the inverter compressor in this embodiment, Figure 6 It is a flowchart of the control method of the inverter compressor in this embodiment, Figure 7 It is a schematic diagram of the frequency conversion process of the compressor in this embodiment.

[0049] Reference Figure 5 As shown, the inverter compressor control device includes: a sensor 11, a controller 21, and a frequency converter 31; the sensor 11 in the unit monitors the outlet water temperatu...

Example Embodiment

[0060] Example three

[0061] This embodiment combines with Figure 8 with Picture 9 Another embodiment of the inverter compressor control method is disclosed. In the refrigeration process, if the actual temperature is lower than the target temperature, that is, the actual temperature is over-adjusted relative to the target temperature, the inverter compressor control method and device described in this embodiment determines whether the over-adjustment is over, and then starts the down-frequency adjustment process.

[0062] Figure 8 It is a schematic diagram of the control device of the inverter compressor in this embodiment, Picture 9 It is a flowchart of the control method of the inverter compressor in this embodiment.

[0063] Reference Figure 8 As shown, the control device of the inverter compressor includes: a sensor 12, a controller 22, and a frequency converter 32; wherein the sensor 12 is used to monitor the temperature of the outlet water in real time, and the contro...

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Abstract

The invention discloses a method for controlling an inverter compressor. According to the method, a target temperature and a dividing temperature point are preset, and a sensor monitors an actual temperature value. The method comprises the following steps that: a controller judges whether the difference between an actual temperature and the target temperature is zero, and the compressor operates at a minimum frequency for a certain period if the difference between an actual temperature and the target temperature is zero; the controller judges whether the target temperature is reached, and thecompressor stops operation if the target temperature is reached, or the controller initializes a PID parameter to allow an inverter to make the compressor start to raise frequency quickly if the target temperature is not reached; the controller judges whether the preset dividing temperature point is reached, and the PID parameter is adjusted if the preset dividing temperature point is reached, orthe PID parameter is kept constant if the reset dividing temperature point is not reached; and the controller judges whether the target temperature is reached, and the compressor operates at a constant frequency and the frequency inversion is finished if the target temperature is reached, or the compressor raises frequency while keeping the original PID parameter if the target temperature is not reached. Correspondingly, the invention also provides a device for controlling the inverter compressor. The method and the device can realize a quick, energy-saving and stable frequency inversion process at the same time.

Description

technical field [0001] The invention relates to the technical field of heating and ventilation, in particular to a control method and device for a variable frequency compressor. Background technique [0002] At present, frequency conversion technology is being used more and more in air conditioning, refrigeration, HVAC and other systems. The frequency conversion compressor can adjust the operating frequency of the compressor rotor according to the actual cooling / heating load, thereby controlling the refrigerant circulation of the compressor and Refrigerant flow into the heat exchanger. The higher the operating frequency, the greater the flow of refrigerant, the greater the cooling / heating capacity, and the stronger the cooling / heating capacity. However, the traditional fixed-frequency compressor always operates at a certain frequency. When the corresponding cooling / heating capacity is not actually needed , resulting in a waste of energy, so the advantages of high-efficiency...

Claims

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Application Information

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IPC IPC(8): F04D27/00F25B49/02
Inventor 国德防肖成进王锡元王靖宇
Owner HAIER GRP CORP
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