Experiment hot air balloon
A technology of hot air balloons and balloons, which is applied in the direction of educational appliances, instruments, teaching models, etc., can solve problems such as insecurity and balloon threats, and achieve the effect of simple materials, saving open flames, and convenient production methods
Inactive Publication Date: 2008-01-30
上海市嘉定区第二中学
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Problems solved by technology
Pass hot air into a balloon made of light materials such as paper, fabric or plastic film, so that the hot air balloon can rise slowly. The general way to make hot air is to use alcohol lamps, candles, blowtorches or solid alcohol. The hot air flow produced by the combustion of such species, which uses an open flame to provide hot air flow, is extremely unsafe and is a great threat to balloons made of light materials
Method used
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Embodiment Construction
[0011] In conjunction with embodiment and accompanying drawing 1,2, the present invention is described further:
[0012] According to the structure of attached drawing 1, cut the plastic film into 8 pieces with arcs on both sides and two pointed ends in the middle, glue them together with tape to make a balloon, leave a round hole at the bottom, roll the paper into a cylinder as a guide For wind use, the size of the cylinder can just fit into the round hole left at the bottom of the balloon. The concrete size (accompanying drawing 2) of the balloon of making is: D 1 ф850mm; D 2 ф600mm; D 3 ф70mm; H is 1000mm. During the experiment, a 220W hair dryer 3 was used to blow hot air into the balloon 1 from the air guide cylinder 2. After the balloon 1 was filled with hot air, the hair dryer 3 and the air guide cylinder 2 were removed, and the round hole at the bottom of the balloon 1 was sealed, and the balloon 1 was ready. It will turn into a hot air balloon and rise slowly, lea...
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The invention relates to a thermotics experiment hot air balloon in physical teaching. The use of open flame to provide hot air flow to the experiment hot air balloons of the prior art is extremely unsafe and poses a serious threat to the balloons made of light material. The invention provides a simple, convenient and safe technic proposal; an experiment hot air balloon made of paper, textile or plastic membrane is characterized in that an electric air blower is adopted to blow hot air to the balloon, when the balloon bellies and is full of air, a hot air balloon forms and rises slowly, the time span of staying in the air is usually up to more than 30 seconds. The invention is characterized in that the material is extremely simple, the manufacture method is extremely convenient, the use of easily obtained household electric air blower to provide hot air source saves the use of open flame, which is safe and reliable, and the air experimental law of 'when the density of the hot air inside the balloon is less than that of the air outside the balloon, the balloon rise' is achieved.
Description
technical field [0001] The invention relates to an experimental device about heat in physics teaching, in particular to a hot air balloon experiment method and device related to the heat in physics teaching. Background technique [0002] Many physical phenomena related to heat and gas in real life, such as engineering operations such as explosions and blasting, and power machinery such as steam engines, internal combustion engines, steam turbines, and jet engines, have applied the knowledge of heat. For a certain mass of gas, its pressure, volume There is a certain relationship between temperature and temperature. In the teaching experiment, a hot air balloon experiment will be done to verify the scientific principle: "When the density of the hot air inside the balloon is less than the density of the air outside the balloon, the balloon will rise into the air. ". Pass hot air into a balloon made of light materials such as paper, fabric or plastic film, so that the hot air b...
Claims
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Login to View More IPC IPC(8): G09B23/16G09B23/06
Inventor 周礼邦陆林元
Owner 上海市嘉定区第二中学