The invention relates to a vacuum
heat pump drying device, comprising a
drying box body, wherein the left end and the right end of the
drying box body are respectively provided with a left end cover and a right end cover as well as a left sealing strip and a right sealing strip, the box body is internally provided with a condenser coil
pipe and an
evaporator coil
pipe lifting frame, the
evaporator coil
pipe lifting frame is provided with an
evaporator coil pipe and a water receiving tray; the box body is externally provided with a compressor and a
throttle, the inlet and the outlet of the compressor are respectively communicated with the outlet of the evaporator coil pipe and the inlet of the condenser coil pipe as well as the inlet and the outlet of the
throttle are respectively communicated with the outlet of the condenser coil pipe and the inlet of the evaporator coil pipe; and a condenser coil pipe bracket is arranged on the inner side wall of the box body. The vacuum
heat pump drying device is characterized in that a water ejector is arranged, the
throat part of the water ejector is communicated with the box body by virtue of a
check valve and a pipeline, the inlet of the water ejector is connected with the outlet of a
high pressure water pump by virtue of a
high pressure water pipeline, the inlet of the
high pressure water pump is communicated with the lower part of a water tank by virtue of a
water pipe, the lower part of the water tank is provided with a
water escape valve, and the exterior below the drying box body is provided with a
blowoff valve and an air intake valve. The vacuum
heat pump drying device provided by the invention can be widely applied to industries requiring low temperature drying such as
food industry,
pharmaceutical industry,
chemical industry and
building material industry.