Compressor lower limit frequency control method and device and air conditioner

A frequency control and compressor technology, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve problems such as compressor out-of-step, compressor operating frequency drop, etc.

Active Publication Date: 2019-11-08
NINGBO AUX ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem solved by the present invention is: the operating frequency of the compressor will drop to a too low value under heavy load conditions, which will easily cause the compressor to lose its step

Method used

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  • Compressor lower limit frequency control method and device and air conditioner
  • Compressor lower limit frequency control method and device and air conditioner
  • Compressor lower limit frequency control method and device and air conditioner

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Embodiment Construction

[0054] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] This embodiment provides a compressor lower limit frequency control method, including:

[0056] The operating parameters of the air conditioner are detected, and the minimum operating frequency of the compressor is adjusted according to the operating parameters, wherein the operating parameters include the phase current of the compressor.

[0057]Wherein, the operating parameters are parameters that can reflect the operating conditions of the compressor, so that the current operating conditions of the compressor can be judged according to the operating parameters. In this embodiment, if it is judged according to the operating parameters that the compressor is under a non-heavy load condition, the minimum operating frequency of the c...

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Abstract

The invention provides a compressor lower limit frequency control method and device and an air conditioner, wherein the compressor lower limit frequency control method comprises the following steps ofdetecting an operation parameter of the air conditioner, and adjusting the lowest operation frequency of the compressor according to the operation parameter, wherein the operation parameter comprisesthe phase current of the compressor. The compressor lower limit frequency control method comprises the following steps of judging the heavy load working condition of the compressor by detecting the operation parameters of the air conditioner, correspondingly adjusting the lowest operation frequency of the compressor when the compressor is in the heavy load working condition, preventing the operation frequency of the compressor from dropping to an over low value, further preventing the compressor from being out of step and avoiding influencing user experience.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method and device for controlling the lower limit frequency of a compressor, and an air conditioner. Background technique [0002] When the air conditioner works under severe conditions such as high temperature and high pressure, the load on the compressor will increase. If the compressor keeps running at high frequency, the loss of the compressor will be increased and the service life of the compressor will be shortened. In the existing air conditioner, the heavy load condition of the compressor is detected by detecting the parameters related to the air conditioner load, and the operating frequency of the compressor is reduced when the compressor is in the heavy load condition, so as to avoid increasing the loss of the compressor. However, existing air conditioners do not limit the minimum operating frequency of the compressor. If the operating frequency of the compre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/86F24F11/64F24F140/20
CPCF24F11/64F24F11/86F24F2140/20
Inventor 李钰
Owner NINGBO AUX ELECTRIC
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