Control method and device of centralized control refrigerating system and centralized control refrigerating system
A control method and cooling system technology, which is applied in the direction of refrigerators, pump control, refrigeration components, etc., can solve problems such as the inability to immediately identify faulty internal machines, and achieve the effect of precise adjustment of opening and optimization of energy efficiency ratio
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Embodiment 1
[0050] figure 1 It is a flow chart of a control method for an integrated control cooling system according to an embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:
[0051] Step S101, obtaining various operating parameters of each internal unit in the centralized control refrigeration system; the above-mentioned operating parameters at least include: the cabinet temperature of the internal unit, the inlet temperature and outlet temperature of the internal unit, the display steps of the electronic expansion valve of the internal unit, The actual number of steps, the superheat of the internal unit.
[0052] Step S102, identifying the faulty indoor unit according to various operating parameters of each indoor unit, and determining the fault type of the faulty indoor unit.
[0053] This embodiment proposes a fault detection scheme for the centralized control cooling system, so that the faulty internal unit in the centralized c...
Embodiment approach
[0054] In the above step S102, the faulty indoor unit is firstly identified according to the cabinet temperature of the indoor unit, and if there is no abnormality in the cabinet temperature of the indoor unit, the faulty indoor unit is further identified according to the superheat degree of the indoor unit. Specifically, it can be realized through the following preferred implementation methods:
[0055] 1) Judging whether the cabinet temperature of each indoor unit exceeds the first threshold.
[0056] 2) If the cabinet temperature of the indoor unit exceeds the first threshold, it is determined that the indoor unit is a faulty internal unit, and then the fault type is determined according to the inlet temperature and outlet temperature of the faulty internal unit and the display steps of the electronic expansion valve of the faulty internal unit .
[0057] 21) If the inlet temperature and outlet temperature of the faulty indoor unit show a rising trend at the same time, and...
Embodiment 2
[0083] The centralized control cooling system of the present application may be a centralized control display cabinet, that is, the internal unit in the centralized control cooling system is a display cabinet. Of course, the internal unit can also be other refrigeration equipment such as an air conditioner. In this embodiment, a display cabinet is taken as an example, and the control scheme of the integrated control cooling system of the present application is introduced in detail with reference to the accompanying drawings.
[0084] figure 2 It is a structural schematic diagram of a centralized control showcase according to an embodiment of the present invention, such as figure 2 As shown, multiple display cabinets are connected to the frequency conversion condensing unit through the return air pipe ( figure 2 The dotted line in ) connection, the frequency conversion condensing unit is connected through the communication line ( figure 2 The dotted line in ) is connecte...
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