The invention discloses a common-pressure
herb-decocting
machine with an internal vacuum condensing device and a condensing cover, which is characterized in that a
herb-decocting
barrel is provided with a circular C-shaped
herb basket inside, a vacuum concentrating tank in the center and a sandwiched cooling cover with a feeding opening and a concentrating water collecting tank at the top. When herbs are decocted,
water vapor is condensed and collected in the concentrating water tank of the sandwiched cover and can be added to the herb-decocting
barrel as secondary decocting water, first decocting liquid
medicine is extracted into the vacuum tank through a feeding
ball valve with a filter screen at the bottom of the vacuum concentrating tank for reducing pressure and rapidly concentrating, and the feeding
ball valve is controlled by a steering
handle to open and close. Residual liquid
medicine in herb residues can be relatively fully extracted in the vacuum concentrating tank without squeezing, and the size of the liquid
medicine in the concentrating tank can be intuitively
read through the herb-decocting
barrel, a notch of the C-shaped herb basket and a scale window of the vacuum concentrating tank for quantificationally concentration. The invention not only saves energy, but also increases the concentration speed of the liquid medicine, reduces the taking volume and lessens the damage of effective contents.