Abstract: A novel additive for recycling thermoset materials, its related recyclable thermoset composition and its application are disclosed. Specifically, the composition of the additive comprises at least one copolymer that has at least one carbamate group, at least one carbonate group and/or at least one urea group, and a number-average molecular weight of the copolymer is between 100 and 50,000 Da.

Abstract: A collapsible bicycle has a frame assembly and a locking device. The frame assembly has a head tube, a sliding bracket, a downtube and a seat tube. The slidable bracket is mounted around the head tube. The downtube is connected pivotally to the slidable bracket, and the seat tube is connected pivotally to the head tube and the downtube. The locking device connects to the slidable bracket and selectively holds the slidable bracket in position. The slidable bracket moves along the head tube to align the downtube and the seat tube with the head tube. Then the locking device holds the slidable bracket in position to hold the collapsible bicycle in a collapsed state.

Abstract: An evaporative heat exchanger of a medium condenser of a air/conditioning system with less cooling fins or even without cooling fins. The evaporative heat exchanger is composed of a plurality of streamline cross sectional tubes used instead of conventional round tubes for providing an evaporative efficiency, and being easy to clean and maintain.

Abstract: An evaporative type medium condenser without the using of conventional cooling fins comprises: characteristically a plurality of streamline cross sectional bare metal tubes disposed in parallel for medium coils to instead the conventional round sectional tubes thereof; a recycling water supply system having a plurality of water spray nozzles for spraying fine water particles onto the surface of coil tubes formed a water film continuously held thereon; a fan system to provide a wind flow blowing over the streamline tubes in a direction from a large head front portion of the streamline cross section to a gradual reduced rear portion thereof and to provide a low pressure area thereat so as to speedy the evaporation of the water film on the surface of the coils tubes for improving a high cooling efficiency to reach a high E.E.R. therefore.

Abstract: A heat exchanger for a medium condenser having a plurality of vertical cooling fins having extra length extended both upwardly and downwardly from an ordinary portion of medium coil path for greatly increasing the cooling efficiency thereof, and a drip-drop type water feeding box for feeding water drops to a top of cooling fins densely but intermittently to let each of water drop remain in the space between opposite surfaces of adjacent cooling fins a short period of time and start to slide down the surface of a cooling fin as a next drop of water is delivered to provide enough time for evaporation so as to absorb a large quantity of latent heat and increase cooling efficiency.

Abstract: An evaporative heat exchanger of a medium condenser of a air condition system with less cooling fins even without cooling fins which a novel coil assembly composed of a plurality of streamline cross sectional tubes is used to instead of conventional round tubes for providing an ultra high evaporative efficiency therefore, and having the further improvement of easy to clean and convenient for maintenance.

Abstract: A heat exchanger for a medium condenser mainly comprises a plurality of vertical cooling fins essentially having extra length extended both upwardly and downwardly from an ordinary portion of medium coil path for greatly increase the cooling efficiency therefore, and a drip-drop type water feeding box for feeding water drops to a top of cooling fins densely but intermittently to let each of water drop been held in the spacing between opposite surfaces of adjacent cooling fins a short period of time and start to slide down around the surface of a cooling fin as a next drop of water is delivered to provide enough time for evaporating so as to absorb a large quantity of latent heat for increasing cooling efficiency therefore.