Abstract: A water quality control method for an evaporative cooling water chiller uses a water pump to transport cooling water from a water tank to a water-spraying element via a water pipe. The cooling water is sprayed onto fins and a refrigerant pipe of a first heat exchanger, flows along the fins and is collected in the water tank. Thereby, the cooling water reduces the temperature of the heat exchanger. The water pump is set to operate for a first period and to stop for a second period so that the temperature of the fins and the refrigerant pipe increases. Thereby, the limescales attached to the heat exchanger are detached and drop into the water tank. Subsequently the water pump is turned on again. The cooling water in the water tank flushes out the accumulated particles on the bottom of the water tank, and clean cooling water is added.

Abstract: A water quality control method for an evaporative cooling water chiller uses a water pump to transport cooling water from a water tank to a water-spraying element via a water pipe. The cooling water is sprayed onto fins and a refrigerant pipe of a first heat exchanger, flows along the fins and is collected in the water tank. Thereby, the cooling water reduces the temperature of the heat exchanger. The water pump is set to operate for a first period and to stop for a second period so that the temperature of the fins and the refrigerant pipe increases. Thereby, the limescales attached to the heat exchanger are detached and drop into the water tank. Subsequently the water pump is turned on again. The cooling water in the water tank flushes out the accumulated particles on the bottom of the water tank, and clean cooling water is added.

Abstract: A heat exchanger that uses water liquid and vapor phases transformation to enhance heat exchange performance mainly includes a primary heat exchanger, a water vaporization device and an auxiliary heat exchanger. The auxiliary heat exchanger has an upper heat exchange tube on an upper end and a lower heat exchange tube on a lower end thereof. The upper and lower heat exchange tubes are connected by a plurality of vertical heat tubes. Refrigerant and water serve as heat exchange media to pre-cool (pre-heat) air intake. The auxiliary heat exchanger and water vaporization device can generate liquid and vapor phases transformation to increase water content in the air to enhance heat exchange effect of the air, thereby to enhance heat exchange performance of the heat exchanger, and save energy and reduce thermal pollution.

Abstract: A heat exchanger that uses water liquid and vapor phases transformation to enhance heat exchange performance mainly includes a primary heat exchanger, a water vaporization device and an auxiliary heat exchanger. The auxiliary heat exchanger has an upper heat exchange tube on an upper end and a lower heat exchange tube on a lower end thereof. The upper and lower heat exchange tubes are connected by a plurality of vertical heat tubes. Refrigerant and water serve as heat exchange media to pre-cool (pre-heat) air intake. The auxiliary heat exchanger and water vaporization device can generate liquid and vapor phases transformation to increase water content in the air to enhance heat exchange effect of the air, thereby to enhance heat exchange performance of the heat exchanger, and save energy and reduce thermal pollution.

Abstract: A heat exchanger with improved heat exchange capability mainly includes a primary heat exchanger, a water vaporization device and a secondary heat exchanger. The secondary heat exchanger may be coupled with the water vaporization device to generate liquid and vapor phase transformation to increase heat exchange capability of the heat exchanger and save energy and reduce thermal pollution.

Abstract: A process for controlling an air conditioner/heater by thermal storage comprises the steps of sending ambient temperature of at least one enclosed space sensed by a plurality of sensors to CPU for comparison with a predetermined value; switching to operate in one of air conditioning, heating, and hot water supplying modes; and if switching to the air conditioning mode and the temperature of thermal storage is less than or equal to the predetermined value, a compressor is turned off, an outdoor fan motor is turned off, and a solenoid-controlled valve is turned on to cause the process to enter into a melting cycle. With this automatic switching, the operation is maintained at an optimum, resulting in an increase of thermal efficiency.

Abstract: An air conditioner/heater automatically operates in either air conditioning or heating mode by coil temperatures of indoor and outdoor heat exchangers. In air conditioning mode, the rotating speed of indoor fan motor is proportional to the ambient temperature of corresponding enclosed space, and the rotating speed of outdoor fan motor is proportional to the coil temperature of corresponding outdoor heat exchanger. In heating mode, the rotating speed of indoor fan motor is proportional to the coil temperature of corresponding indoor heat exchanger, and the rotating speed of outdoor fan motor is inversely proportional to the coil temperature of corresponding outdoor heat exchanger. With this automatic switching of operation mode, the capability of heat dissipation of condenser is always larger than the capability of heat absorption of evaporator. Hence, the operation of the air conditioner/heater is maintained at an optimum.