Disclosed are an air-cooled
water chiller with a natural cooling function and a control method for the
water chiller. The air-cooled
water chiller with the natural cooling function comprises a compressor, a condenser, a throttler and an
evaporator which are sequentially connected, a condensate fan is arranged on the condenser, the air-cooled water
chiller further comprises a natural
cooling coil, a three-way valve, an inlet
chilled water temperature sensor, an outlet
chilled water temperature sensor, an outdoor environment temperature sensor and a controller, the natural
cooling coil is arranged on an air inlet side of the condenser, the three-way valve comprises a first joint, a second joint and a third joint and is serially connected onto a water inlet
pipe of the
evaporator through the first joint and the second joint, a water inlet
pipe of the natural
cooling coil is communicated with the water inlet
pipe of the
evaporator, and a water outlet pipe of the natural cooling coil is communicated with the third joint of the three-way valve. The air-cooled water
chiller has the advantages of remarkable energy-saving effect, high running reliability, simple control method, compact structure, small occupied space and low production cost.