Air conditioner

Abstract

The invention discloses an air conditioner, which comprises a compressor, a four-way valve, an outdoor heat exchanger, a first throttling element, an indoor unit assembly and an ejector, wherein the compressor is provided with an exhaust port, a return air inlet and a jet orifice; the ejector is provided with a first inlet, a second inlet and an outlet; the first inlet is connected with the exhaust port by a first control valve; the second inlet is connected with the second end of the first throttling element by a second control valve; the outlet is connected with the jet orifice; and when the air conditioner is operated in a low-temperature heating status, the first control valve and the second control valve are opened, refrigerants which enter the ejector from the first inlet and the second inlet are mixed and are discharged from the outlet, and the refrigerants return to the compressor through the jet orifice. According to the air conditioner provided by the embodiment of the invention, the ejector can heat middle supplementary air by virtue of high-temperature exhaust air, so that the degree of superheat of the middle supplementary air is improved; and meanwhile, a part of loss due to pressure reduction of high-pressure fluid can be recycled by the ejector, so that the capacity and the energy efficiency of the air conditioner can be improved.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to an air conditioner. Background technique [0002] The air-conditioning system in the related art often has the situation that the lower the external ambient temperature, the worse the heating effect, which is inconsistent with the requirement that the lower the external ambient temperature, the better the heating effect in reality. In order to improve the low-temperature heating effect of the air-conditioning system, the air-injection enthalpy increase technology of the compressor is applied in the air-conditioning system, and the fluid at the air-jet port of the compressor often comes from the low-pressure refrigerant in the system. The gas is entrained with liquid, causing wet compression. On the other hand, the generation source of the intermediate suction pressure comes from the throttling of the system, the control of the intermediate pressure is more complicated, and the direct t...

AI Technical Summary

Problems solved by technology

In order to improve the low-temperature heating effect of the air-conditioning system, the air-injection enthalpy increase technology of the compressor is applied in the air-conditioning system, and the fluid at the air-jet port of the compressor often comes from the low-pressure refrigerant in the system. Gas with liquid, causing wet compression

On the other hand, the source of the intermediate suction pressure comes from the throttling of the system, the control of the intermediate pressure is more complicated, and the direct throttling brings a certain amount of energy loss

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