The order is as follows.
1. Triangle symbol: indicates automatic mode. The air conditioner will automatically perform cooling or heating depending on the indoor temperature.
2. Sun Symbol: It is heating mode and the air conditioner is doing heating work.
3. Raindrop symbol: This is the dehumidification mode. The air conditioner performs defrost work, which is actually the cooling operation mode, but the indoor unit fan speed is low and the operation time is intermittent.
4. Snowflake symbol: This is the cooling mode. The air conditioner performs cooling work, suitable for switching on in summer.
5. The fan page symbol: This is the ventilation mode. Only the indoor unit fan operates for ventilation.
MIT students have invented an invention. Fill out ae used drink bottle with water, add a small amount of formalin, put a piece of iron on it, install it on the roof and it will become a plastic bottle. . 55 watt energy saving lamps. Today, this invention, called a solar drink bottle bulb, has brought light to 1,000 poor Filipino families.
The first “solar beverage bottle bulb” can indeed “provide lighting in a dark room during the day without consuming electricity”
The second “bulb” can be compared; energy-saving lamps turned on? Limited by the experimental conditions, the feeling is not obvious. Formalin can improve the illumination ability of the "light bulb", but the specific improvement cannot be demonstrated at present;
The working principle of the third "light bulb" is probably to "to gather the external light and refract it". in ae subdued light “interior, providing more uniform lighting.”
Question: This “bulb” is so bright but doesn’t use any electricity, so where does the light come from?
Answer: Light bulbs cannot emit light, but they can “focus” light, collecting and refracting outside light into the room, providing basic lighting for rooms without windows.
Question: What is the iron plate used for?
Answer: The iron plate can fix the “bulb” and can also reflect sunlight into the bottle, improving the “light gathering” ability.
Question: What is formalin used for?
Answer: Formalin can increase the refraction of light by the solution in the bottle, and it can also have a sterilizing effect to prevent the water in the bottle from becoming smelly.
Question: What are the disadvantages of this "light bulb"?
Ansonse: Formalin solution is not easy to buy, and the ampoule can only be used during the day, not at night; when installed on the roof, gaps are prone to leaks.