Multi-connected air-conditioning system and its control method, control device and storage medium
A multi-connected air-conditioning and control method technology, applied in air-conditioning systems, refrigeration and liquefaction, space heating and ventilation, etc. Small flow and other problems, to avoid too large or too small subcooling before the valve, to ensure the heating capacity and system stability, and to improve the comfort of the heating and air outlet.
Active Publication Date: 2021-10-08
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Problems solved by technology
For the three-pipe heat recovery multi-split air conditioning system, when a heating internal unit is turned on, that is, the system is running in the pure heating mode, the main heating mode or the main cooling mode, if the electronic expansion valve related to the system is not properly controlled, it will A large amount of liquid accumulation or outgassing (low supercooling) in the heating internal unit will result in a small flow rate of the heating internal unit and poor heating capacity or system instability, thus affecting the comfort of the heating air outlet
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[0035] 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.
[0036] The multi-connected air-conditioning system proposed by the embodiments of the present invention, its control method, control device and storage medium are described below with reference to the accompanying drawings.
[0037] figure 1 is a schematic diagram of the corresponding electronic expansion valves of the multi-connected air conditioning system according to the embodiment of the present invention. Such as figure 1 As shown, the multi-connected air-conditioning system includes an outdoor unit and multiple indoor un...
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The invention discloses a multi-connected air-conditioning system and its control method, control device and storage medium, wherein, the external unit is provided with an external unit electronic expansion valve and a board replacement electronic expansion valve, and each internal unit is provided with an internal unit electronic expansion valve. Valve, the control method includes: obtaining the operation mode of the multi-connected air-conditioning system; detecting that the operation mode is any one of the pure heating mode, the main heating mode and the main cooling mode, and obtaining the pre-valve subcooling of each heating indoor unit According to the operation mode and the pre-valve subcooling degree of each heating indoor unit, the corresponding electronic expansion valve is controlled to discharge the liquid accumulation of the heating inner unit or increase the subcooling degree of the heating inner unit. The control method adjusts the electronic expansion valve according to the operation mode of the multi-connected air-conditioning system and the subcooling degree before the valve of the heating indoor unit, which can avoid the overcooling before the valve of the heating indoor unit from being too large or too small, thereby ensuring the control of the heating system. The heating capacity and system stability of the internal heating unit improve the comfort of heating and airflow.
Description
technical field [0001] The present invention relates to the technical field of air conditioning, and in particular to a multi-connected air conditioning system and its control method, control device and storage medium. Background technique [0002] At present, the existing multi-connected air-conditioning systems, such as the heat recovery multi-connected air-conditioning system mainly include: two-pipe heat recovery multi-connected air-conditioning system and three-pipe heat recovery multi-connected air-conditioning system, the main difference between the two is the external unit and the Does the main pipe of the refrigerant flow switching device (abbreviated as MS device) between the internal units have two or three pipes. For the three-pipe heat recovery multi-split air conditioning system, when a heating internal unit is turned on, that is, the system is running in the pure heating mode, the main heating mode or the main cooling mode, if the electronic expansion valve re...
Claims
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IPC IPC(8): F24F1/0003F24F11/67F24F11/84F25B41/31
CPCF24F1/0003F24F11/67F24F11/84F25B2313/0231F25B2600/2513F25B41/31Y02B30/70
Inventor 谭志军胡亚飞丁云霄罗彬
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD