Multi-split system and control method and device of multi-split system during low-temperature refrigeration
A multi-connection system and control method technology, applied in the field of multi-connection systems, can solve the problems of affecting the service life of the fan, frequent start and stop of the fan, and the failure of the fan to achieve the effect of improving the cooling effect, operation reliability and service life
Inactive Publication Date: 2017-06-13
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Problems solved by technology
However, when operating in a low-temperature environment, the system pressure is generally relatively low. At this time, the range of pressure fluctuations caused by windshield change is very small, so it is difficult to control the windshield change, and it is prone to frequent start and stop of the fan, which affects the service life of the fan.
Especially in the ultra-low temperature environment, it is easy to appear that when the fan should be turned on, the pressure is low but the fan is not turned on, so that the capacity of the external unit cannot be effectively exerted, and the cooling effect of the multi-line system is affected.
If the pressure corresponding to turning on the fan is set too low, the exhaust temperature will drop rapidly after the fan is turned on, and it is prone to insufficient exhaust superheat, which will affect the life of the compressor and the reliability of the multi-line system
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[0023] 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.
[0024] The multi-line system and its control method and device for low-temperature refrigeration according to the embodiments of the present invention will be described below with reference to the accompanying drawings.
[0025] figure 1 It is a flow chart of a control method for low-temperature refrigeration of a multi-line system according to an embodiment of the present invention.
[0026] Such as figure 1 As shown, the control method for low-temperature refrigeration of the multi-line system in the embodiment of the present...
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The invention discloses a multi-split system and a control method and device of the multi-split system during low-temperature refrigeration. The method includes the following steps that the outdoor environment temperature is obtained, and high pressure when the multi-split system runs is obtained; according to the outdoor environment temperature and the high pressure, when it is judged that the multi-split system enters a low-temperature refrigeration running mode, the degree of supercooling of the multi-split system is calculated; and according to the degree of supercooling of the multi-split system, a windshield of an outdoor draught fan is controlled. According to the method, the refrigeration effect of the multi-split system can be improved, the running reliability of the multi-split system can be improved, and the service life of the multi-split system can be prolonged.
Description
technical field [0001] The invention relates to the technical field of multi-connection systems, in particular to a control method for low-temperature refrigeration of a multi-connection system, a control device for low-temperature refrigeration of a multi-connection system, and a multi-connection system. Background technique [0002] When the multi-split system is in cooling operation, the windshield of the outdoor fan is generally adjusted according to the system pressure. However, when operating in a low-temperature environment, the system pressure is generally relatively low. At this time, the range of pressure fluctuation caused by windshield change is very small, so it is difficult to control the windshield change, and it is prone to frequent start and stop of the fan, which affects the service life of the fan. Especially in the ultra-low temperature environment, it is easy to appear that when the fan should be turned on, the pressure is low but the fan is not turned o...
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IPC IPC(8): F24F11/00
CPCF24F2120/10F24F11/30F24F11/62F24F11/64F24F11/70F24F2110/10F24F2110/12F24F2110/40
Inventor 任林行许永锋熊美兵马熙华梁泽坤赵增毅
Owner GD MIDEA HEATING & VENTILATING EQUIP CO LTD