How does the air conditioner automatically control the indoor temperature, and how does the elevator achieve automatic operation

In the hot summer or cold winter, we all want to stay in a comfortable environment with a moderate temperature and low humidity, and the breeze is clean. The learning and working efficiency in this environment is very high. The air conditioner is an electrical appliance that can automatically adjust the indoor temperature, and it is becoming more and more popular. The main components of the air conditioner to achieve temperature control are compressor, condenser, evaporator, thermostat and other components related to temperature regulation. The compressor is the power machine that changes the refrigerant; the condenser transfers the heat of the high-temperature and high-pressure steam sent by the compressor to the surrounding cooling medium-air, and condenses it into a high-pressure liquid; the evaporator absorbs the heat generated by the indoor objects, The indoor temperature is reduced; the temperature controller is composed of an electronic circuit centered on the microprocessor, which compares the indoor temperature with the set temperature, and then determines whether the air conditioner starts, stops or continues to work. In order to achieve this purpose, a set of "special programs" are programmed in advance in the microprocessor to realize the functions set by people, such as timing, sleep, dehumidification, natural wind, cooling or heating, etc. To achieve these functions, the operation is very simple. So how does the air conditioner determine the level of the room temperature and automatically control the room temperature? Let's first look at how the air conditioner works automatically in summer. There is a temperature sensing device in the air conditioner, which can receive the temperature change information. In this temperature sensing device, there is a thermistor whose resistance value changes with temperature. The change in resistance value causes a certain potential change in the circuit. After the microprocessor collects and processes the information, it becomes a command to control the start or stop of the compressor and other components. When the compressor and other components are working, the indoor air and the air in the air conditioner are constantly exchanged, which causes the indoor temperature to continuously decrease. When the room temperature is lower than the predetermined temperature, the air conditioner makes a judgment through the microprocessor, automatically stops the compressor, stops the cooling, or sends only natural wind. When the room temperature slowly rises above the set temperature, the compressor starts again automatically. The compressor in the air conditioner works in this way repeatedly, so that the room temperature is always maintained at the temperature people hope to reach. The working principle of air conditioners in winter is similar, but the method of temperature judgment is different, and the compressor is not cooling, but heating. With the advancement of technology, more and more automatic elevators have become more and more popular. Larger shops, hotels, or high-rise apartments are generally equipped with one or several escalators. When you enter the elevator, you only need to press a few buttons, and the elevator will automatically run quickly and accurately, sending you to your destination, which is labor-saving and safe. The automatic elevator can run automatically because it is equipped with a microcomputer controller. Inside this controller, there is a pre-programmed control program, which can imitate human thinking to work. Next, let's take a look at how the elevator rises automatically. Before closing the elevator, the elevator must first judge: is the elevator "overloaded"? If "yes", it immediately sends out an "alarm" and asks to exit several passengers until it is "not overloaded". At this time, the elevator closed the door and began to rise. While the elevator is ascending, it is necessary to judge whether there is someone in the elevator to go down when it reaches the upper floor? (When passengers get on the elevator, they need to press the floor button that they want to reach) Open the door and let the passengers get on and off. If no one gets off, it also has to judge whether someone outside the elevator wants to get on the elevator? (Guests who want to take the elevator should press the corresponding button at the door outside the elevator). If someone gets on it, it will stop even if no one is in the elevator. It will automatically open the door and invite passengers to come up. After that, it continued to rise. Only when there are neither people on board nor people on board, this layer will not stop. This process is repeated over and over, and the decline process is similar to the rise process. The microcomputer controller plays a key role in the automatic operation of the elevator. It is the timely collection of information that passengers in and out of the elevator need to enter and exit the elevator, and then quickly process, judge, process, and issue corresponding commands to ensure that the elevator can automatically and safely run safely and faithfully for passengers day and night service.

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