Method and device for avoiding abnormal shutdown of air conditioner caused by voltage leap and air conditioner

A voltage mutation and voltage change technology, applied in heating methods, mechanical equipment, space heating and ventilation, etc., can solve problems affecting user comfort experience, malfunction, compressor shutdown, etc., to avoid excessive current triggering shutdown The effect of protection, reduction of air conditioning load, and improvement of reliability

Inactive Publication Date: 2020-06-02
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, in some power grid environments with relatively large voltage fluctuations, relying on a fixed AC current judgment threshold for judgment may easily trigger the misoperation of overcurrent protection, resulting in frequent shutdown of the compressor, which affects the user's comfort experience

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  • Method and device for avoiding abnormal shutdown of air conditioner caused by voltage leap and air conditioner
  • Method and device for avoiding abnormal shutdown of air conditioner caused by voltage leap and air conditioner
  • Method and device for avoiding abnormal shutdown of air conditioner caused by voltage leap 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] The power grid voltage in our country is 220V, 50Hz. Because the power supply frequency will not change, the compressor speed of the traditional fixed-frequency air conditioner basically remains unchanged. The temperature control principle is to sense the indoor temperature change through the temperature sensor, and to adjust it by continuously turning on and off the compressor. Indoor temperature, it is easy to cause the room temperature to be hot and cold, and consume more power.

[0056]The inverter air conditioner can continuously adjust the load of the compressor by changing the speed of the compressor to adapt to the dynamically changing room temperature and adjust the load demand. It has the advantages of high efficiency, ener...

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Abstract

The invention provides a method and device for avoiding abnormal shutdown of an air conditioner caused by voltage leap and the air conditioner, and relates to the technical field of air conditioners.The method includes the steps that input voltages and input currents are continuously sampled; the input voltages are recorded every first time interval; the difference between the recorded input voltages of every two consecutive times is calculated; and the compressor frequency is adjusted according to the difference, a voltage change threshold for comparison with the difference and the input currents. According to the method and device for avoiding the abnormal shutdown of the air conditioner caused by the voltage leap and the air conditioner, the current change is reflected through judgmentof the voltage change quantity within a certain time, different voltage change ranges correspond to different current protection values, and a compressor is controlled to reduce frequency and stop according to the voltage change so as to avoid abnormal shutdown of the compressor due to voltage fluctuations, so that the system operational stability is improved, and the user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular to a method, device and air conditioner for avoiding abnormal shutdown due to sudden changes in the voltage of the air conditioner. Background technique [0002] With the improvement of living standards, air conditioners have entered thousands of households and become common household appliances in modern life, and their energy saving and comfort have become the focus of attention of users. Therefore, more and more users will choose to use more energy-saving inverter air conditioners for room temperature adjustment to create a more comfortable working and living environment. [0003] During the system frequency control process, the existing frequency conversion air conditioner executes frequency reduction or protection shutdown control by judging the input AC current value. Under different operating conditions, the AC current judgment threshold is a preset fixed pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/32F24F11/64F24F11/70F24F11/88
CPCF24F11/32F24F11/64F24F11/70F24F11/88
Inventor 王知恒胡立志李超
Owner NINGBO AUX ELECTRIC
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