Control method and device for low-temperature refrigeration of air conditioner and air conditioner

A control method and low-temperature technology, applied in the field of devices, air conditioners, and low-temperature refrigeration control methods for air conditioners, can solve problems such as poor operation stability of air conditioners, achieve increased operation stability, and avoid compressors and compressors. Drive unconnected shutdown protection Effect

Active Publication Date: 2022-06-28
NINGBO AUX ELECTRIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The problem solved by the present invention is that the running stability of the existing air conditioner is poor during cooling operation in the transitional season

Method used

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  • Control method and device for low-temperature refrigeration of air conditioner and air conditioner
  • Control method and device for low-temperature refrigeration of air conditioner and air conditioner
  • Control method and device for low-temperature refrigeration of air conditioner and air conditioner

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Embodiment Construction

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] At present, during the low temperature refrigeration operation of the air conditioner, within the fixed outer ring temperature range, the target frequency of the compressor is not related to the driving operation stability, the suction superheat degree, and the exhaust superheat degree. During compressor drive control, low-frequency operation is usually easy to reach the critical operating range of the compressor, and the rotational speed is low, the control stability is difficult, and the control instability is prone to lead to the shutdown protection of the compressor and the compressor drive not connected.

[0029] The air conditioner control method provided by the embodiment of the present invention, when the air cond...

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Abstract

The invention provides a method and device for controlling low-temperature refrigeration of an air conditioner, and an air conditioner. The method includes: obtaining the actual operating frequency of a compressor in the case of low-temperature refrigeration; and calculating the frequency according to the actual operating frequency and the target operating frequency of the compressor. Deviation value; if the number of low-frequency and high-deviation states in multiple consecutive cycles is greater than the number threshold, then increase the target operating frequency. The present invention can determine whether to increase the target operating frequency according to the actual operating frequency and the size of the frequency deviation value in a certain period. By increasing the target operating frequency, the operating stability of the air conditioner during cooling operation in transitional seasons can be increased, and compressors and compressors can be avoided. The drive is not connected to shutdown protection.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, and in particular, to a control method and device for low-temperature refrigeration of an air conditioner, and an air conditioner. Background technique [0002] During the cooling operation of the air conditioner in the transitional season (spring and autumn), due to the additional refrigerant combined with the influence of the outer ring environment, the compressor operates at a low frequency, and it is easy to reach the critical operating range of the compressor, and the compressor speed is low, and the control stability is difficult. , resulting in unstable control, resulting in the problem that the compressor and the compressor drive are not connected, and the system operation stability is poor. SUMMARY OF THE INVENTION [0003] The problem to be solved by the present invention is the problem of poor operation stability of the existing air conditioner during the refrigerati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/32F24F11/61F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F24F110/12
CPCF24F11/32F24F11/61F24F11/64F24F11/65F24F11/84F24F11/86F24F11/88F24F2110/12
Inventor 李兆东刘合心陈华胡立志郝明
Owner NINGBO AUX ELECTRIC
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