Knowledge

After the air conditioner is used for a period of time, a large amount of dust and dirt will accumulate on the filter, evaporator and air supply system, producing a large number of

Common faults caused by dirty and clogged air conditioner filters ① The cooling and heating effects of the air conditioner are poor: the filter is dirty and blocked. During cooling

1. The air filter in the indoor unit of the air conditioner is generally valid for 6 months under normal use conditions. 2. If the air conditioner is not used frequently and the en

type 1. Vertical air conditioning filter contains three layers: dust removal net, activated carbon net, and reinforced net. It is recommended to replace it every 1-2 months. 2. Bed

The air conditioning filter has a concave and convex honeycomb structure and can be widely used in air filtration and sewage filtration systems. Antibacterial agent (DEP) and antif

There are many types of speakers used in 2014. According to its working principle, it can be divided into electromagnetic type, electric type, piezoelectric type, electrostatic typ

Speakers (speakers), generally called horns, are an indispensable piece of equipment for a sound system. Everything from "trumpet" to listening to music and appreciating

During the same period as Bell, different speaker types were proposed. As a hobby, Ernst W. Siemens (founder of Siemens & Halske) applied for a patent for an electric loudspeak

Static speakers More than a hundred years ago, on February 14, 1876, Alexander Graham Bell proposed the most important patent in history, the "telephone." This invention

<3> Piezoelectric speakers: Speakers that utilize the inverse piezoelectric effect of piezoelectric materials are called piezoelectric speakers. Dielectrics (such as quartz,

<1> Magnetic speaker: also known as "reed speaker", there is an electromagnet with a movable iron core between the two poles of the permanent magnet. When there is

As the name suggests, the tweeter unit is a speaker unit designed to play back high-frequency sounds. Its structural forms mainly include solution type, cone type, ball top type an