DC frequency converting air-conditioner compressor intelligent controller and control method thereof

A technology of air-conditioning compressors and intelligent controllers, which is applied in control/regulation systems, heating and ventilation control systems, instruments, etc., and can solve the problems that the key core technology of frequency conversion and inverter control needs to rely on others, and the cost remains high.

Active Publication Date: 2009-08-19
宁波德业变频技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Naturally, this type of solution also has the disadvantages of relying on others for the key core technology of frequency conversion and inverter control, and the cost is still high.

Method used

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  • DC frequency converting air-conditioner compressor intelligent controller and control method thereof
  • DC frequency converting air-conditioner compressor intelligent controller and control method thereof
  • DC frequency converting air-conditioner compressor intelligent controller and control method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0093] Embodiment 1 gathers all the main technical features of the present invention, and is the best embodiment of the intelligent controller of DC inverter air conditioner compressor and its control method in the present invention.

[0094] The hardware principle block diagram of the controller of embodiment one is as figure 1 As shown, the inside of the dotted line represents the internal hardware structure of the outdoor controller of the DC inverter air conditioner, and the outside of the dotted line represents the external functional units connected and controlled by the controller.

[0095] Such as figure 1 As shown, the intelligent controller of the DC inverter air conditioner compressor in Embodiment 1 includes a rectification filter circuit (220) and a power module (210) for driving the DC inverter compressor (140) that are electrically connected in sequence. The circuit (220) has an electrical interface for connecting to the AC mains (150), and the power module (21...

Embodiment 2

[0170] Embodiment 2 only omits the relay (260) used to control the four-way valve (110) of the air conditioner outdoor unit in the hardware configuration of the controller in Embodiment 1. It is used for single cooling function or single heating function air conditioner. Its related control method is also completely the same as that of Embodiment 1. Because the relay (260) used to control the four-way valve (110) of the outdoor unit of the air conditioner is omitted in the hardware configuration of the controller, the DC inverter air conditioner it is adapted to does not need the four-way valve (110) of the outdoor unit, so , the DC inverter air conditioner obtained in this way cannot switch between cooling and heating modes, and only has a single cooling function or a single heating function; it is suitable for users who require a single cooling function or a single heating function.

Embodiment 3

[0172] Embodiment 3 only omits the power factor correction circuit (230) in the hardware configuration of the controller in Embodiment 1. Its rectification and filtering circuit (220) is directly electrically connected with the power module (210) used to drive the DC variable frequency compressor (140), and the rectification and filtering circuit (220) is also used to provide a low-voltage power supply (240) and as a A single DSP controller (200) of the core processing unit is electrically connected; other hardware configurations and connections are the same as those in Embodiment 1. Correspondingly, the relevant control method also omits part of the process related to power factor correction, and the others are completely the same as those in Embodiment 1, and will not be described in detail here. The power factor index of the DC inverter air conditioner obtained in this way is slightly inferior, about 95%, but it has the advantage of relatively low cost.

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PUM

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Abstract

The invention provides an intelligent controller used for a direct current (DC) frequency-conversion air conditioner compressor and a technical proposal of the control method thereof; the hardware proposal comprises a rectifier filter circuit and a power module which are electrically connected sequentially; the rectifier filter circuit (220) is also electrically connected with a single DSP controller used as a core processing unit by a switch power supply (240); the single DSP controller is also respectively and electrically connected with the power module, a communication isolation circuit which is used for communicating with the indoor machine of the air conditioner, a fan driving circuit (280), and a temperature sampling circuit (270); the control method comprises the steps as follows:the control software is embedded in the DSP controller; by a control type of dual close-ring FOC no-sensor magnetic field vector, the current ring at the internal ring realizes the decoupling controlto the driving current of the permanent magnetic synchronous motor of a compressor and indirectly controls the output torque of the motor; the speed ring at the external ring is used for controlling the working frequency of the compressor, thus not only meeting the stable requirement during fixed frequency but also meeting the dynamic response during the frequency conversion; and the control software comprises a primitive recursive function and a main interrupt function.

Description

technical field [0001] The invention belongs to the technical field of electronic intelligent control, and relates to an intelligent controller of a DC variable frequency air conditioner compressor and a control method thereof, and also relates to an air conditioner controlled by the controller. Background technique [0002] The traditional fixed-frequency air conditioner (fixed-frequency air conditioner) adopts the "on-off" fixed adjustment mode, which has high energy consumption, large noise and temperature fluctuations, poor comfort, and great damage to the air-conditioning compressor when switching. In contrast, inverter air conditioners change the frequency through a built-in inverter controlled by a microcomputer, thereby controlling the speed of the air conditioner compressor. The speed of the compressor can be changed continuously to realize the stepless adjustment of the energy of the compressor. Compared with ordinary fixed-frequency air conditioners, inverter air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00G05F1/70
Inventor 张和君王和平牛涛
Owner 宁波德业变频技术有限公司
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