3results about How to "Guaranteed vacuum environment" patented technology

This invention relates to the field of die-casting mold technology and discloses a die-casting mold for aluminum alloy forming, comprising a moving mold and a fixed mold, and further comprising: a pre-vacuuming mechanism, fixedly installed inside the fixed mold, the pre-vacuuming mechanism including a sealing element and a pre-vacuuming channel communicating with the sealing element, and a slot corresponding to the sealing element on the moving mold; a vacuuming mechanism, including a fixed mold vacuuming component fixed on the fixed mold and a moving mold vacuuming component fixed on the moving mold; and a feeding assembly, fixedly installed on the side of the fixed mold away from the moving mold. This die-casting mold for aluminum alloy forming, by setting the pre-vacuuming mechanism and the vacuuming mechanism, initiates pre-vacuuming during the mold closing process, utilizing the dynamic stage of the gradually decreasing cavity volume to expel most of the gas in advance; a second vacuuming is performed after mold closing to further extract residual gas. The synergistic effect of the two vacuuming processes effectively reduces the initial gas content in the cavity.

This invention relates to a plate absorption heat exchanger, comprising a base frame, and a heat pump unit, a first solution tank, a second solution tank, a circulating pump, a brazed heat exchanger, and a detachable plate heat exchanger mounted on the base frame. The heat pump unit includes a shell divided into four chambers, each housing a generator, a condenser, an absorber, and an evaporator. The generator, condenser, absorber, and evaporator each have a plate structure. The heat pump unit of this plate absorption heat exchanger has a plate structure for its generator, condenser, evaporator, and absorber, offering advantages such as high compactness, small size, and low cost.

The utility model discloses a kind of seaweed oligosaccharide concentration and crystallization device, comprising: membrane filtration equipment installed on the outer wall one end of bottom plate top and crystallization tank on the outer wall other end of bottom plate top, further comprising: connecting between membrane filtration equipment and crystallization tank liquid inlet pipe, liquid suction pump is installed on the liquid inlet pipe, and fixed plate is installed on the outer wall of bottom plate top, the outer wall of fixed plate one side is installed with electrically-conductive sliding platform, and controller is installed on the outer wall of fixed plate one side, tank cover is installed on the electrically-conductive sliding platform sliding member.The utility model of a kind of seaweed oligosaccharide concentration and crystallization device, by membrane filtration preliminary concentration, in combination with vacuum low-temperature heating depth enrichment, seaweed oligosaccharide thermal degradation can be avoided, water is removed efficiently;Ethanol addition and stirring linkage, ensure uniform mixing, conducive to the regular precipitation of crystal;Sealing structure guarantees the vacuum environment in tank, filter screen cooperates with sliding platform and collects crystal conveniently, overall improves concentration crystallization efficiency and product quality.