Air conditioning system and control method thereof
An air-conditioning system and control method technology, applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of increasing air-conditioning costs, complex structure, and difficult implementation, and achieve improved return air enthalpy, obvious effect, and simple structure reasonable effect
Active Publication Date: 2013-10-09
GD MIDEA HEATING & VENTILATING EQUIP CO LTD
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Problems solved by technology
Although this method also obtains supercooling, the bypassed refrigerant returns directly to the return air pipe of the compressor, resulting in a reduction in the refrigerant circulation of the entire system, sacrificing capacity, complex structure, and difficult implementation; it also increases the cost of air conditioning
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[0029] The air conditioning system and its control method of the present invention will be described in detail below with reference to the accompanying drawings.
[0030] like figure 1 As shown, the air conditioning system of the present invention includes a refrigerant circulation loop, and the refrigerant circulation loop includes a compressor 1 connected by pipelines 7, 8, 9, 11, 10, a four-way reversing valve 2, an outdoor heat exchange device 3, electronic expansion valve 16, first solenoid valve 6 and indoor unit, and also includes a second solenoid valve 5 and a refrigerant bypass line from the mixed low-pressure tank 4 to the indoor unit, and the refrigerant bypass line is connected to the first The electromagnetic valve 6 is connected in parallel; the mixed low-pressure tank 4 is provided with a heat exchanger, the mixed low-pressure tank 4 is connected to the compressor 1 by a return pipe 13, and the mixed low-pressure tank 4 is connected to the four-way reversing va...
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The invention discloses an air conditioning system and a control method thereof. The air conditioning system comprises a coolant circulation loop, wherein the coolant circulation loop comprises a compressor, a four-way reversing valve, an outdoor heat exchanger, an electronic expansion valve, a first solenoid valve and an indoor unit which are connected by pipelines. The air conditioning system is characterized by further comprising a second solenoid valve and a coolant bypass pipeline which leads to the indoor unit from a mixed low-pressure tank, wherein the coolant bypass pipeline is connected in parallel with the first solenoid valve; a heat exchanger is arranged in the mixed low-pressure tank; and the mixed low-pressure tank is connected with the compressor through an air returning pipe. In the control method for the air conditioning system, control over the supercooling degree or superheat degree of an air conditioning coolant is realized by controlling the switching time of the second solenoid valve of the coolant bypass pipeline within a cycle. By the control method thereof, an ideal supercooling degree or superheat degree is obtained by controlling the switching time of the coolant bypass pipeline, thereby increasing an enthalpy value of returned air of the system. A special supercooler is not required, and the system has a simple and rational structure and remarkable effects.
Description
technical field [0001] The invention belongs to a compression refrigeration system, in particular to an air-conditioning system and a control method thereof, which can control the subcooling degree of a refrigerant in the air-conditioning compression refrigeration system. Background technique [0002] The compression refrigeration system of the air conditioner is composed of a compressor, a condenser, an evaporator, and a throttling element. The pipelines are connected in a certain order to form a closed system. The closed system is filled with an appropriate amount of refrigerant. , the refrigerant comes out of the compressor and returns to the compressor through the condenser, evaporator and throttling structure, and the heat moves along with the movement of the refrigerant, realizing the refrigeration process of absorbing heat from the evaporator to releasing heat to the condenser . [0003] The subcooling degree refers to the difference between the saturation temperatu...
Claims
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IPC IPC(8): F25B41/00F25B49/02
Inventor 熊美兵闫晓楼
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD