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DC inverter air conditioner and its control method

A technology of DC frequency conversion and control method, which is applied in the direction of heating and ventilation control system, heating method, space heating and ventilation, etc. It can solve the problems of large switching loss and heating of IPM module, and achieve low production cost, improve comfort, Simple and reasonable structure

Active Publication Date: 2011-12-21
MIDEA GRP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The higher the carrier frequency of the IPM module, the greater the switching loss of the IGBT, and the more serious the heat of the IPM module

Method used

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  • DC inverter air conditioner and its control method
  • DC inverter air conditioner and its control method
  • DC inverter air conditioner and its control method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] see figure 1 , the remote control 1 of the DC inverter air conditioner or the control panel on the indoor unit mainly transmits information such as the operating mode, temperature setting, and wind speed setting set by the user to the indoor controller 2 through the infrared medium or directly.

[0028] The indoor controller 2 of the DC inverter air conditioner is mainly used to receive control information from the remote controller 1 or the control panel on the indoor unit, control loads such as indoor fans and stepping motors, and conduct two-way communication with the outdoor controller 3 to exchange information. Calculate the compressor target frequency, etc.

[0029] The main function of the outdoor controller 3 of the DC inverter air conditioner is to perform two-way communication and exchange information with the indoor controller 2 to co...

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Abstract

The invention relates to a direct current convertible frequency air conditioner and a control method thereof. The direct current convertible frequency air conditioner comprises a power supply inverter module (IPM), and is characterized in that: the pulse width modulation (PWM) control signal of the power supply inverter module comprises more than two types of carrier frequencies, and the carrier frequencies correspond to the working mode of the direct current convertible frequency air conditioner. During operation, the method for operating the direct current convertible frequency air conditioner comprises the following steps of: 1, determining a corresponding carrier frequency in advance according to different working modes for running the direct current convertible frequency air conditioner; 2, calculating corresponding control parameters of a compressor according to the carrier frequency which is determined after selecting the working mode; 3, storing the control parameters of the compressor in corresponding positions of an outdoor storage; and 4, starting the air conditioner by a user to determine the different working modes for running the direct current convertible frequency air conditioner. The invention not only can solve the problem of heating of the power supply inverter module which runs at a high frequency in a high-temperature environment, but also solves the problem of instability of the frequency conversion compressor which runs at an ultrahigh frequency in a heating mode, so the comfort of the convertible frequency air conditioner is greatly improved.

Description

technical field [0001] The invention relates to a DC frequency conversion air conditioner, in particular to a DC frequency conversion air conditioner and a control method thereof. Background technique [0002] The existing DC inverter cooling and heating air conditioners cannot simultaneously meet the high temperature and high cooling capacity requirements in the cooling mode and the low temperature and high heating capacity requirements in the heating mode. One of the important reasons is that the high temperature cooling capacity of the inverter air conditioner is limited. The core device in the control part of the inverter air conditioner - the power inverter module, hereinafter referred to as the IPM module, is too hot to run at high frequency. In the heating mode, the low-temperature heating capacity is limited by the control part and cannot allow the compressor to run at high frequency. [0003] To solve the heat generation problem when the IPM module works in the high...

Claims

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Application Information

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IPC IPC(8): F24F11/00
Inventor 朱良红李强罗宇华
Owner MIDEA GRP CO LTD
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