Abstract: A heat exchange system and a method for determining whether flow of cooling medium passing through a heat exchanger is too low. The heat exchange system includes a refrigerant flow path in which refrigerant circulates; a cooling medium flow path in which cooling medium circulates; and a heat exchanger connected to both the refrigerant flow path and the cooling medium flow path so that the refrigerant and the cooling medium exchange heat in the heat exchanger. The heat exchange system includes a first temperature sensor arranged at a cooling medium inlet of the heat exchanger, a second temperature sensor at a cooling medium outlet of the heat exchanger, and a controller in communication with the first temperature sensor and the second temperature sensor. The controller is configured to determine whether the flow of cooling medium in the heat exchanger is too low based on a temperature difference.

Abstract: The present invention relates to a heat exchange tube for a terminal product of an air-conditioning system. Air and a refrigerating medium perform heat exchange through the heat exchange tube, and protrusions are disposed on an inner wall of the heat exchange tube. The present invention further relates to an air-conditioning terminal product provided with the heat exchange tube, an air-conditioning system provided with the air-conditioning terminal product, and a method of manufacturing a heat exchange tube for a terminal product of an air-conditioning system. The heat exchange tube for a terminal product of an air-conditioning system according to the present invention is advantageous in a small volume, high heat-exchange efficiency, low manufacturing costs, and the like.