Air conditioner with wide voltage range

Abstract

The invention discloses an air conditioner with a wide voltage range, which comprises an indoor unit, an outdoor unit and a controller for controlling starting and running of the indoor unit. The outdoor unit consists of a condenser, a fan motor, a throttle component, a compressor and a control valve, the indoor unit comprises an indoor evaporator, various elements are connected by pipelines to form an integral loop, and the controller is a switch power source. Structures of the compressor and the fan motor of the air conditioner are optimized, accordingly, the motor can adapt to a wide running voltage range between 130V and 280V, temperature rise can meet design requirements of the motor when the air conditioner runs at limit high voltage and limit low voltage, the attenuation ratio of performances of the air conditioner is low, normal refrigeration can be realized when the air conditioner runs at low voltage, and the refrigeration capacity can be kept higher than 75% of rated voltage when the air conditioner runs at the limit low voltage.

Description

Technical field [0001] The present invention relates to the technical field of refrigeration and air conditioning, in particular to an air conditioner with a wide operating voltage range. Background technique [0002] At present, the normal working voltage range that can be guaranteed in the design of ordinary household fixed frequency air conditioners is generally only between 187V and 242V in China, and generally between 187V and 253V in foreign countries. If the voltage is too low or too high (beyond the above) In the case of voltage range), the air conditioner will not work normally, which will affect the cooling and heating effect. In some foreign countries or regions (such as India and Pakistan) and some remote rural areas in China, due to the existence of objective problems of power shortage and instability of township power grids, the supply voltage of user power grids varies widely, and the voltage is often lower than 170V or higher 260V, for this kind of power supply a...

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Problems solved by technology

[0002] At present, the normal working voltage range that can be guaranteed by the design of ordinary household fixed-frequency air conditioners is generally only between 187V and 242V in China, and between 187V and 253V in foreign countries. If the voltage is too low or too high (beyond the above voltage range), the air conditioner will not work normally, affecting the cooling and heating effect

In some foreign countries or regions (such as India, Pakistan) and some remote rural areas in China, due to the existence of objective problems such as power shortage and instability of township power grids, the supply voltage of user power grids varies widely, and the voltage is often lower than 170V or higher than 260V, for this kind of power supply voltage without a voltage regulator, ordinary air conditioners cannot start or run normally

In order to broaden the operating voltage range of fixed-speed air conditioners, some air conditioners on the market currently adopt the method of adjusting the refrigerant flow rate, that is, the throttling device adopts a parallel connection structure, but this method can only improve the operating voltage of the air conditioner in a small range, and does not Can not fundamentally solve the problem of low voltage operation of the air conditioner

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