Multi-on-line system and mode switching method thereof
A multi-connection system and mode switching technology, applied in the field of multi-connection systems, can solve problems such as increasing solder joints, increasing system hardware and pipeline complexity, affecting system reliability, etc., to achieve the effect of preventing noise and ensuring reliability
Active Publication Date: 2017-10-10
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Problems solved by technology
[0003] In related technologies, in order to solve the above problems, a smaller valve body is mostly connected in parallel to the refrigeration solenoid valve and the heating solenoid valve in the flow distribution device, and the small valve body is used to equalize the pressure first, and then the large valve body is used to maintain the flow; or It is to use an external valve body, capillary tube or electronic expansion valve for pressure equalization, but these solutions are all based on increasing hardware to achieve the purpose of small pressure difference switching, which will increase the complexity of system hardware and pipelines, and increase the number of valve bodies Will lead to more solder joints, which will affect the reliability of the system
Method used
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[0026]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0027] The mode switching control method, computer-readable storage medium and multi-connection system proposed by the embodiments of the present invention will be described below with reference to the accompanying drawings.
[0028] In an embodiment of the present invention, the multi-connected system may include an outdoor unit, a plurality of indoor units, and a flow distribution device, each of the multiple indoor units includes an indoor heat exchanger and an indoor throttling element, and the flow distribution device includes...
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The invention discloses a multi-on-line system and a mode switching method thereof. The method comprises the following steps that when any one of a plurality of indoor units receives a mode switching instruction, the indoor unit sends the mode switching instruction to a flow dividing device; and the flow dividing device obtains the inlet temperature and the outlet temperature of an indoor heat exchanger of the indoor unit, opening and closing of a refrigeration on-off valve and a heating on-off valve which correspond to the indoor unit are controlled according to the inlet temperature and the outlet temperature of the indoor heat exchanger of the indoor unit and the mode switching instruction, and the opening degree of an indoor throttle element of the indoor unit is adjusted. Therefore, on the basis that a valve body is not additionally added and the cost is not increased, combination adjustment of the indoor throttle element and the flow dividing device is utilized to control the pressure of the indoor unit side to become the medium pressure state, then small pressure difference switch is conducted, thus noise caused by large pressure difference switch is effectively prevented, and the reliability of the system is guaranteed.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to a mode switching control method of a multi-connection system and a multi-connection system. Background technique [0002] In the mixed mode of the three-pipe multi-connected system, the refrigerant provided by the outdoor unit can meet the simultaneous cooling and heating needs of multiple indoor units. The working mode of multiple indoor units can be adjusted, but when adjusting the working mode of the indoor unit, the pressure on the air pipe side of the indoor unit will be directly switched from high pressure to low pressure or from low pressure to high pressure directly, because the indoor units are connected by long pipes At the same time, the volume of the indoor heat exchanger is relatively large, so that noise is generated at the moment when the cooling solenoid valve and heating solenoid valve in the flow distribution device are switched. For example, when the ...
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Patent Timeline
Login to View More IPC IPC(8): F24F5/00F24F11/00F24F13/30F25B41/06F25B49/02F25B41/20F25B41/30
CPCF24F5/00F24F13/30F25B49/02F25B41/30
Inventor 李元阳杨国忠王命仁谭志军
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD