Refrigerating system of air-conditioning and method for controlling flow of refrigerant

Abstract

The present invention discloses an air conditioner refrigerating system. A compressor, a four-way reversing valve and an outdoor heat exchanger are disposed on the outdoor machine. An indoor heat exchanger is disposed on the indoor machine. Two ports of the four-way reversing valve are connected to the air intake end and the air discharge end of the compressor, and another two ports of the four-way reversing valve are respectively connected to the outdoor heat exchanger and indoor heat exchanger. a capillary is connected between the outdoor heat exchanger and the indoor heat exchanger, an electronic expand valve is disposed between the capillary and the indoor heat exchanger, a liquid pipe temperature sensing apparatus is disposed between the electronic expand valve and the indoor heat exchanger, a inspiration temperature sensing apparatus is disposed at the air intake port of the compressor. The present invention also discloses a control method for refrigerant flux.

Description

technical field [0001] The invention relates to an air-conditioning technology, in particular to an air-conditioning refrigeration system and a refrigerant flow control method. Background technique [0002] Chinese Patent No. 98110372.3 discloses a refrigeration system for one-to-many air conditioners, including a compressor, a liquid receiver, a four-way valve, a dry filter, a muffler, an outdoor heat exchanger, corresponding pre-cooling capillary tubes, and an indoor heat exchange There is a corresponding electronic expansion valve with a certain pulse range between each indoor heat exchanger and its corresponding supercooling capillary, and a compressor exhaust valve is installed between the compressor and the four-way valve. The air temperature measuring point Ti is provided with a corresponding cooling outlet temperature measuring point Ti (i: a natural number above 5) at the cooling outlet end of the indoor heat exchanger, between the pre-cooling capillaries correspond...

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Problems solved by technology

[0003] In the technical solution of the invention, a capillary tube is set between the outlet of the outdoor unit heat exchanger and the suction port of the compressor, and the evaporation of the refrigerant on the capillary tube is used to simulate the evaporation of the indoor unit refrigerant in the evaporator. However, The temperature measured by this simulation method is inaccurate and cannot accurately reflect the working conditions of the indoor unit. In addition, the outdoor unit cannot know the temperature of the heat exchanger of the indoor unit and can only perform a simple simulation. Therefore, the adjustment of the opening of the electronic expansion valve not accurate and timely

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