Air-conditioner outdoor unit, air-conditioner and control method of air-conditioner

Abstract

The invention discloses an air-conditioner outdoor unit, an air-conditioner and a control method of the air-conditioner. The air-conditioner outdoor unit comprises a shell, an outdoor heat exchanger,a fan and a cover. The shell is provided with a cavity and provided with a first air inlet and a first air outlet which communicate with the cavity, the outdoor heat exchanger and the fan are locatedin the cavity, the cover is connected with the shell, and a ventilation channel is formed between the cover and the shell and communicates with the first air inlet and the first air outlet. Accordingto the air-conditioner outdoor unit, the ventilation channel communicating with the first air inlet and the first air outlet is defined between the cover and the shell so that air flow which flows outof the first air outlet and is relatively high in temperature can be mixed with air flow which is at the first air inlet and is relatively low in temperature in the ventilation channel, the temperature of air flow entering the cavity can be adjusted, then the condensing pressure of a refrigerant can be adjusted, the problem that too low condensing pressure affects the properties of the air-conditioner can be avoided, and operation of the air-conditioner can be more stable.

Description

technical field [0001] The present invention relates to the technical field of electric appliances, in particular, to an air conditioner outdoor unit, an air conditioner and a control method thereof. Background technique [0002] The ambient temperature for refrigeration of multi-connected air conditioners is generally required to be greater than -5°C, but for some special places and regions, when the outdoor ambient temperature is as low as -15°C, there may still be cooling requirements. For example, in the large computer rooms and electronic equipment rooms in the building, the machines and equipment in these places will continue to heat up during operation, and there is no ventilation condition, so the air conditioner is required to still be able to cool down in this low temperature environment. However, when the outdoor ambient temperature is very low, even if the outdoor fan is at the minimum speed, the condensing pressure on the outdoor side will still drop rapidly, so...

AI Technical Summary

Problems solved by technology

However, when the outdoor ambient temperature is very low, even if the outdoor fan is at the minimum speed, the condensing pressure on the outdoor side will still drop rapidly, so the evaporating pressure after throttling will be lower, which will easily cause frost on the indoor evaporator and reduce the cooling effect. very poor

In addition, the evaporation of the refrigerant is not complete, which may easily cause the compressor to return liquid and damage the compressor.

After the external fan is completely turned off, due to the existence of the windshield, the heat dissipation is too poor, causing the system pressure to rise rapidly, and the system pressure is difficult to stabilize

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