Refrigerant cooling device as well as control method thereof and air conditioning system

Abstract

The invention discloses a refrigerant cooling device as well as a control method thereof and an air conditioning system. The refrigerant cooling device comprises a cooling plate and a regulating valve, and further comprises an obtaining module and a control module, wherein the inlet of the cooling plate is connected with one end of the regulating valve; the other end of the regulating valve is connected with a condenser; the outlet of the cooling plate is connected with an evaporator; the cooling plate corresponds to a heating element, and is used for cooling the heating element; the obtainingmodule is used for obtaining a refrigerant temperature between one end of the regulating valve and the inlet of the cooling plate; and the control module is used for controlling opening degree of theregulating valve according to the refrigerant temperature. The device controls the regulating valve by acquiring the refrigerant temperature between one end of the regulating valve and the inlet of the cooling plate, so that the problems that measuring errors are great, and the refrigerant temperature and refrigerant flow cannot be coordinated as distribution of cooling plate temperature is uneven are avoided, and therefore, the cooling effect of the heating element can be guaranteed. Moreover, the refrigerant cooling device is relatively low in cost and is wide in range of application.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to a refrigerant cooling device, an air conditioning system, a control method of the refrigerant cooling device and a non-transitory computer-readable storage medium. Background technique [0002] For high-power inverters, key components such as the inverter and rectifier modules of the inverter will generate a lot of heat during use, and effective cooling is required to ensure the stable operation of the inverter. [0003] In related technologies, on the one hand, cooling water circulation is used to cool the heating elements of the inverter, but this method requires additional water pumps, air-cooled radiators, etc. to cool the cooling water, which will greatly increase the volume and cost of the inverter system . Moreover, with the miniaturization of the IGBT (Insulated Gate Bipolar Transisto, Insulated Gate Bipolar Transistor) module of the frequency converter,...

AI Technical Summary

Problems solved by technology

However, this method is not suitable for cooling systems with adjustable valves that have phase-change heat

The main reason is: in the cooling system with phase-change heat with an adjustable valve, the regulating valve can control the flow of the cooling medium on the one hand, and on the other hand, it will also affect the throttling effect of the cooling medium. The flow rate of the cooling medium increases, but at the same time the throttling effect weakens, the temperature of the cooling medium rises, and the heat transfer temperature difference becomes smaller; the opening of the regulating valve decreases, the flow rate of the cooling medium decreases, but at the same time the throttling effect increases, and the temperature of the cooling medium decreases. The heat transfer temperature difference increases, that is, the heat dissipation capacity of the cooling plate increases first and then decreases as the valve is closed. Simply adjusting the opening of the regulating valve according to the temperature of the cooling plate may not be able to meet the requirements of the heating element. cooling needs

[0005] In addition, because the temperature uniformity of the cooling plate is very poor, in production, a slight deviation in the position of the temperature measurement point will cause a large measurement error

The temperature of the cooling plate also has a hysteresis. It generally takes tens of seconds to adjust the heat dissipation capacity of the cooling medium to respond to the temperature of the cooling plate. These bring great difficulties to the control of the cooling system, and the cooling system must retain a large margin amount to deal with

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