Control method for preventing indoor heat exchanger from frosting when frequency conversion air conditioner operates in refrigerating mode

A technology of an indoor heat exchanger and a control method, which is applied in the field of variable frequency air conditioners, can solve problems such as discomfort and room temperature fluctuations, and achieve the effects of stable room temperature, avoiding frost formation, and avoiding room temperature fluctuations.

Active Publication Date: 2015-11-11
安徽奥克斯智能电气有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the targeted measures taken in the prior art are relatively simple and rude. Once the coil temperature of the indoor heat exchanger is found to be too low, the machine will be shut down directly or the frequency of the compressor will be greatly reduced. This will inevitably cause large fluctuations in the room temperature. makes people very uncomfortable

Method used

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Embodiment Construction

[0016] The control method of the present invention for preventing the frosting of the indoor heat exchanger during the cooling operation of the frequency conversion air conditioner is as follows.

[0017] During the cooling operation, real-time detection of the coil temperature Tm of the indoor heat exchanger is used as the basis for judgment.

[0018] The control process under normal conditions is that after the inverter compressor is turned on, Tm will gradually decrease. When Tm drops to between 8-9°C, such as 8.5°C, the variable-frequency compressor will rise slowly at a speed of 10-15s / Hz. Frequency, such as increasing the frequency at a rate of 1Hz in 12 seconds; Tm will continue to decrease at this time, when Tm drops to between 3 and 5°C, for example, when Tm is 4°C, the current inverter compressor operating frequency is defined as the highest Frequency, keep the highest frequency for stable operation, so that Tm is also stable in the optimal temperature range between ...

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Abstract

The invention discloses a control method for preventing an indoor heat exchanger from frosting when a frequency conversion air conditioner operates in a refrigerating mode. The control method includes the steps that the coil pipe temperature Tm of the indoor heat exchanger is detected to serve as a judgment basis in the refrigerating process; a compressor starts in the normal state, and the frequency of the frequency conversion compressor rises slowly at the speed of 10 s/Hz to 15 s/Hz when the Tm drops to 8 DEG C to 9 DEG C; when the Tm drops to 3 DEG C to 5 DEG C, the compressor is kept to operate stably at the current frequency; when absorbed heat is slightly insufficient, the Tm drops to 1 DEG C to 2 DEG C, the frequency of the frequency conversion compressor is lowered slowly at the speed of 5 s/Hz to 10 s/Hz and does not stop being lowered until the Tm rises to 5 DEG C to 6 DEG C again, and then the compressor is kept to operate stably at the current frequency; when the absorbed heat is seriously not enough, and the Tm drops to be -1 DEG C to -2 DEG C, the frequency conversion compressor stops working. By means of the method, the temperature fluctuation of a room can be lowered.

Description

technical field [0001] The invention relates to the field of frequency conversion air conditioners, in particular to a control method for preventing frosting of indoor heat exchangers during cooling operation of frequency conversion air conditioners. Background technique [0002] During the cooling process of the inverter air conditioner, if the heat exchange with the indoor environment occurs, for example, the user suddenly adjusts the indoor fan from the high wind speed to the low wind speed, or suddenly closes the window of the room with the window open, or the indoor unit enters Causes such as blockage of the tuyere will lead to a sudden reduction in the heat absorbed by the air conditioner from the room and insufficient heat exchange. If the output frequency of the compressor does not respond in time, the temperature of the coil of the indoor heat exchanger will drop rapidly. At this time, if the air Humidity is high, and it is very easy to frost on the coil of the indo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/00
CPCF24F11/30F24F11/43
Inventor 张刚
Owner 安徽奥克斯智能电气有限公司
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