The invention discloses a refrigeration device, including: a first compressor unit (101), an indoor heat exchanger (3) and an outdoor heat exchanger (2), sequentially communicated; a first throttle device (401) and a second throttle device (402), sequentially connected in series; and an air supply device (5), provided between the first throttle device (401) and the second throttle device (402). The refrigeration device further includes a second compressor unit (102). An air intake port (B) of the second compressor unit (102) is communicated with an outlet of the outdoor heat exchanger (2). An outlet (E) of the second compressor unit (102) is communicated with the air supply port (C) of the first compressor unit (101) and an air exhaust port (D) of the first compressor unit (101) by means of a three-way valve (10), respectively.