Abstract: The present disclosure provides an identity recognition method, including: receiving registration information of a first user; binding a first login password to a first account corresponding to a post; receiving a login request sent by a user terminal; and responding to the login request, and sending data information of the first account binding with a first login password to the user terminal, to make the user terminal display the data information. The present disclosure further provides an identity recognition apparatus, system and a server. According to the identity recognition method, apparatus, system and the server, an account is set to have a corresponding relationship with a post, thus a successor of the post can browse historical-data information of the account corresponding to the post through the login password. Thusly, the user experience is good.

Abstract: A cooler system includes a plurality of cooler units; a condensed water flow path, an aqueous medium in the condensed water flow path sequentially flowing through each of the cooler units; a cooling water flow path, an aqueous medium in the cooling water flow path sequentially flowing through each of the cooler units in a flow direction opposite to a flow direction of the aqueous medium in the condensed water flow path; a plurality of current sensors used for detecting working currents of the cooler units; water temperature sensors used for detecting an entering water temperature and a leaving water temperature of the cooling water flow path; at least one virtual temperature sensor arranged between the cooler units and used for acquiring a middle water temperature between the cooler units; and a controller.

Abstract: A refrigeration system, a fault diagnosis system and a fault diagnosis method for the refrigeration system, a controller and a storage medium. The fault diagnosis method includes: receiving a fault alarm sent by an associated refrigeration system, and acquiring a fault cause list associated with the fault alarm; determining whether to run a fault diagnosis system associated with the fault alarm; and when the fault diagnosis system associated with the fault alarm is run, checking the associated refrigeration system sequentially according to the fault cause list, and acquiring a fault cause and a repair means list associated with the fault cause.

Abstract: A method for monitoring a surge in a fluid device and a refrigeration system. A fluid device is disposed in an operating unit. The method includes providing and displaying a surge line of the fluid device, where the surge line is at least related to a characteristic between fluid pressure and a flow rate of the fluid device; based on preset time intervals, sequentially providing and displaying operating points, of the fluid device in a current operation condition, in a coordinate system to which the surge line belongs, and when a quantity of the provided operating points exceeds a preset value, removing the first provided operating point therein, so that a quantity of the remaining operating points is the preset value; and monitoring a surge status of the fluid device according to relative position relationships between the displayed operating points and the surge line.

Abstract: A refrigeration system, a fault diagnosis system and a fault diagnosis method for the refrigeration system, a controller and a storage medium. The fault diagnosis method includes: receiving a fault alarm sent by an associated refrigeration system, and acquiring a fault cause list associated with the fault alarm; determining whether to run a fault diagnosis system associated with the fault alarm; and when the fault diagnosis system associated with the fault alarm is run, checking the associated refrigeration system sequentially according to the fault cause list, and acquiring a fault cause and a repair means list associated with the fault cause.

Abstract: A cooler system includes a plurality of cooler units; a condensed water flow path, an aqueous medium in the condensed water flow path sequentially flowing through each of the cooler units; a cooling water flow path, an aqueous medium in the cooling water flow path sequentially flowing through each of the cooler units in a flow direction opposite to a flow direction of the aqueous medium in the condensed water flow path; a plurality of current sensors used for detecting working currents of the cooler units; water temperature sensors used for detecting an entering water temperature and a leaving water temperature of the cooling water flow path; at least one virtual temperature sensor arranged between the cooler units and used for acquiring a middle water temperature between the cooler units; and a controller.

Abstract: A method for monitoring a surge in a fluid device and a refrigeration system. A fluid device is disposed in an operating unit. The method includes providing and displaying a surge line of the fluid device, where the surge line is at least related to a characteristic between fluid pressure and a flow rate of the fluid device; based on preset time intervals, sequentially providing and displaying operating points, of the fluid device in a current operation condition, in a coordinate system to which the surge line belongs, and when a quantity of the provided operating points exceeds a preset value, removing the first provided operating point therein, so that a quantity of the remaining operating points is the preset value; and monitoring a surge status of the fluid device according to relative position relationships between the displayed operating points and the surge line.

Abstract: A heat pump system operable in a cooling mode, a heating mode and a defrost mode includes a refrigerant compressor (20), a reversing valve (30), a first heat exchanger (40) and a second heat exchanger (50) disposed in a refrigerant circuit, and a primary expansion valve (45) disposed in the refrigerant circuit between said first heat exchanger (40) and said second heat exchanger (50); said reversing valve (30) is positionable in a first position for operation of said heat pump system in the cooling mode or defrost mode and is positionable in a second position for operation of said heat pump system in the heating mode; a refrigerant bypass circuit establishes a refrigerant flow path from the refrigerant circuit at a first location upstream of said primary expansion valve (45) and downstream of said first heat exchanger (40) with respect to refrigerant flow in the defrost mode to a liquid reservoir (70) disposed in the refrigerant circuit at a second location downstream of said primary expansion valve (45) with

Abstract: Methods and systems are described for controlling an expansion valve in large chiller refrigerant loops that employ a modified fuzzy logic control system that modulates an electric expansion valve for controlling cooling capacity.