Heat exchanger and control method thereof
A heat exchanger and heat exchange tube technology, applied in the direction of heat exchanger shell, refrigerator, refrigeration components, etc., can solve the problems of fixed heat exchange area, inability to load regulation, and low energy efficiency of air conditioners, and achieve better heat exchange effect. , Solve the effect of fixed heat exchange area
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Embodiment 1
[0025] The four major components of the refrigeration cycle are figure 1 As shown, including compressor, condenser, evaporator and throttling device. The present invention proposes a novel structure of the evaporator and condenser, that is, the structure of the heat exchanger and the overall control mode of the chiller, so as to improve the energy efficiency of the whole machine.
[0026] Specifically, figure 2 An optional structural schematic diagram of the heat exchanger is shown, such as figure 2 As shown, the unit includes:
[0027] The heat exchange tube is located in the heat exchange area; wherein, the heat exchange tubes are divided into multiple groups; the heat exchange area is the area where the heat exchange tube and the tube sheet are located, and the refrigerant and chilled water perform heat exchange;
[0028] A control valve is provided corresponding to each set of heat exchange tubes, and is used to control the on-off of each set of heat exchange tubes. ...
Embodiment 2
[0037] In the preferred embodiment 2 of the present invention, a heat exchanger control method is provided, which is applied to the heat exchanger in the above embodiment 1. Specifically, image 3 An alternative flowchart showing the method, such as image 3 As shown, the method includes the following steps S302-S306:
[0038] S302: Detect the total flow rate of chilled water, and determine the first opening value range of the heat exchange tube according to the total flow rate;
[0039] S304: Correcting the first opening numerical range, and determining the second opening numerical range of the heat exchange tube;
[0040] S306: Calculate the evaporation temperature corresponding to each opening value within the second opening value range, and determine the opening value with the largest evaporation temperature as the opening value of the heat exchange tube.
[0041] In the above embodiments, the heat exchange tubes are divided into multiple groups, and the on-off of each ...
Embodiment 3
[0069] Based on the heat exchanger provided in the above-mentioned embodiment 1, in preferred embodiment 3 of the present invention, an air-conditioning unit is also provided, including the above-mentioned heat exchanger.
[0070] In the above embodiments, the heat exchange tubes are divided into multiple groups, and the on-off of each group of heat exchange tubes is controlled by a corresponding control valve. In the variable water flow system, the solenoid valve is used to control the on-off of the heat exchange tubes, change the number of heat exchange tubes participating in the refrigeration system, and adjust the water flow rate to keep the evaporation temperature and condensation temperature at the optimum value. Compared with the heat exchanger with fixed heat exchange tubes in the prior art, the heat exchange effect is better and the unit is always running at high efficiency, which effectively solves the problem that the heat exchange area of the air conditioner in th...
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