Enhanced vapor injection air conditioning system and control method thereof
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An air-conditioning system and jet enthalpy increase technology, which is applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve problems such as compressor failures, reduce failures, improve gas-liquid separation effect, and improve refrigerant. dryness effect
Inactive Publication Date: 2019-12-20
HISENSE (SHANDONG) AIR CONDITIONING CO LTD
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[0003] The invention provides an air-injection enthalpy-increasing air-conditioning system and its control method to solve the existing technical problems that compressor failure and wear are easily caused by the incomplete gas-liquid separation of the flasher. The dryness of the refrigerant improves the gas-liquid separation effect, effectively prevents the liquid from flowing back into the compressor, and reduces the risk of compressor failure and wear
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no. 1 example
[0052] See figure 1 , The first embodiment of the present invention provides an air-conditioning system for increasing enthalpy by air injection, including: an indoor heat exchanger 3, an outdoor heat exchanger 4, a compressor 1, a four-way reversing valve 2, a flasher 5, and a throttling device 6;
[0053] The four-way reversing valve 2 has a first port, a second port, a third port and a fourth port;
[0054] The first port of the indoor heat exchanger 3 communicates with the first port of the four-way reversing valve 2, and the second port of the indoor heat exchanger 3 communicates with the inlet of the flasher 5;
[0055] The first port of the outdoor heat exchanger 4 communicates with the second port of the four-way reversing valve 2, and the second port of the outdoor heat exchanger 4 communicates with the outlet of the flasher 5;
[0056] The exhaust port of the compressor 1 communicates with the third port of the four-way reversing valve 2, and the air return port of...
no. 2 example
[0077] see Figure 4 The second embodiment of the present invention provides a control method for an air-injection enthalpy-increasing air-conditioning system, using the air-injection enthalpy-increasing air-conditioning system as described in any one of the first embodiment, the control method comprising:
[0078] S11: turn on the compressor when the air conditioner is in heating operation;
[0079] S12: Detect the temperatures of the exhaust port of the compressor, the air return port of the compressor, the heat exchange coil of the indoor heat exchanger, and the heat exchange coil of the outdoor heat exchanger;
[0080] S13: Calculate the difference between the temperature of the exhaust port of the compressor and the temperature of the heat exchange coil of the indoor heat exchanger as a first temperature difference;
[0081] S14: Calculate the difference between the temperature of the air return port of the compressor and the temperature of the heat exchange coil of the ...
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Abstract
The invention provides an enhanced vapor injection air conditioning system and a control method thereof. A first port of a four-way reversing valve communicates with a first port of an indoor heat exchanger, a second port of the four-way reversing valve communicates with a first port of an outdoor heat exchanger, a third port of the four-way reversing valve communicates with an exhaust hole of a compressor, and a fourth port of the four-way reversing valve communicated with a gas return hole of the compressor. A second port of the indoor heat exchanger communicates with an inlet of a flash-tank. A second port of the outdoor heat exchanger communicates with an outlet of the flash-tank. A gas-state cold medium outlet of the flash-tank communicates with a jet hole of the compressor through ajet pipeline. A throttling device is arranged on the jet pipeline. An electronic throttling valve is arranged at the inlet of the flash-tank, and an electronic expansion valve is arranged at the outlet of the flash-tank. The indoor heat exchanger and the outdoor heat exchanger communicate through the electronic throttling valve, the flash-tank and the electronic expansion valve. The gas-liquid separating effect can be improved, it is avoided that a liquid-state cold medium directly returns to a compressor and failures caused by liquid returning happen to the compressor, and therefore the failure and abrasion risks of the compressor are effectively reduced.
Description
technical field [0001] The invention relates to the technical field of air-injection enthalpy-increasing air conditioners, in particular to an air-injection enthalpy-increasing air-conditioning system and a control method thereof. Background technique [0002] When the air conditioning system is heating and running at low temperature, due to the low outdoor ambient temperature, the temperature difference between the evaporation temperature of the outdoor heat exchanger and the ambient temperature is very small, so the heat that can be absorbed from the external environment is relatively small, and a large amount of refrigerant is accumulated in the external unit. In the heat exchanger and gas-liquid separator, the suction and discharge volume of the compressor is insufficient, which makes the heat of the indoor mechanism drop significantly. Now some manufacturers use a system with gas injection to increase heating capacity. Generally, a flasher is used to obtain medium-press...
Claims
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