Abstract: A heating device includes a main body, a first member, a second member, a third member, an induction coil, a support member, and a magnetic induction element. The main body has an accommodating space and is configured to accommodate a fluid. The main body includes a first end part and a second end part opposite to the first end part. The first member is connected to the first end part of the main body. The second member is connected to the second end part of the main body. The third member is connected to the second member. The induction coil surrounds an outside of the main body. The support member includes base and a plurality of extension parts connected to the base. The magnetic induction element is disposed in the accommodating space.

Abstract: An apparatus for improving vehicle efficiency mainly includes a vehicle engine and an oxygen producing device. The oxygen producing device is located on an intake passage between an air filter and an intake manifold to increase oxygen content in the air. When the air enters the air intake passage and passes through the air filter, the air and pure oxygen are drawn into the engine through the intake manifold. Hence combustion in the engine is proceeded more efficiently due to increase of oxygen content. And the engine has a higher transformation effect to boost horsepower. Fuel-saving effect of the engine also improves. And exhaust gas can be discharged more eco-friendly to reduce air pollution.