Why do you need to use CPUs for home appliances?

No, the CPU on household appliances is not so much a CPU, but actually an electronic component such as a timer trigger, which cannot be compared with a computer CPU that does a lot of complex calculations. There is also a CPU in the mobile phone, which is similar to the computer CPU, but the main frequency is much lower than the CPU on the computer, of course, there are some high-end mobile phones such as N97, the CPU frequency has reached 434MHz, but this is still not comparable with the mainstream CPU of the current computer (2500MHz to 3000MHz or so).

Not the same. Because there are more and more functions, and they are more intelligent, they need the CPU to handle them.

The CPU in electrical appliances is generally a single-chip microcomputer, which has fewer functions and runs slower.

The computer's CPU has more tasks to handle, and the speed is also faster.

Smart appliances have a motherboard, integrated with CPUs and other components, as the brain of the appliance to control the appliance. For example, how long do you soak the automatic washing machine, how long do you wash, how long does it take to spin dry, set a program and he will wash it himself, and you set the temperature of the air conditioner in summer, and he will start it when it is high, and stop it when the temperature is low.

Press a key of the remote control to emit an infrared code that represents the special meaning of the key, which is received by household appliances and sent to the decoder (with a dedicated CPU) for decoding, and then executes the operation corresponding to this key.

It's all for operational control.

Because the most important component in the electrical appliance is the motor, and the motor is the most direct use of alternating current, the electricity emitted by the generator of the State Grid is also alternating current, the use of alternating current equipment is simple, and the electricity from the power plant is transported to the destination after being boosted and then used directly by stepping down.

Advantages: Long-distance transmission of DC power is smaller than that of AC transmission, but at present, the vast majority of electrical appliances are AC, and they will become AC after DC transmission, so the cost of DC transmission equipment is large. Generally, the method of increasing the transmission AC voltage is used to reduce the loss, and the DC transmission can be used when the transmission voltage cannot meet the requirements.

At present, there are direct current transmission circuits in China. The direct use of a DC public circuit (neutral line) is also costly.

Alternating current is easy to convey (the step-up and step-down equipment is simple, and it is convenient for long-distance high-voltage transmission).

The use of AC power is simple, and the AC motor is much simpler than the DC motor, and there is no need for a commutator! (Three-phase alternating current can generate a rotating magnetic field).

Alternating current is used for the convenience of power transmission.

There are electric motors that use direct current and alternating current.

Alternating current can be easily transformed, suitable for long-distance transmission, and the loss of high-voltage transmission is low.

The same principle is the same, because it can be easily converted into the required low-voltage, AC or DC injector circuit. DC power is much more difficult and costly to transform.

In addition, industrial power equipment is generally AC equipment, which can directly use AC power. The structure of an AC motor is much simpler than that of a DC motor, the cost is much lower, and the efficiency is much higher.

In fact, there is no problem of parallel connection of household appliances. Our country stipulates that the power supply voltage of the mains is 380 220V, and all industrial appliances and household appliances are designed and manufactured in accordance with the specified voltage. As long as electrical appliances are put into use, they will form a so-called "parallel" relationship with each other, which only exists in the stage of enlightenment education.

Reason: 1) The voltage of the household circuit is 220V, and the rated voltage of the household appliance is 220V, in the parallel circuit, the voltage of each electrical appliance is equal 2) In order to ensure the normal operation of the electrical appliance, it is necessary to ensure that his voltage is sufficient, so it must be connected in parallel to the circuit to work normally.

3) the voltage of each electrical appliance of the parallel circuit is equal, that is, it is equal to 220V, so in the household appliances in order to meet the normal working needs of the electrical appliances to be paralleled 4) the above is said to be in the household appliances, in other electrical appliances are the same, most of the parallel connection, but there are also series connections, such as the various electronic components on a circuit board can be regarded as a consumer appliances, then there is a series connection situation in this circuit In short, most household appliances are used in parallel mode.

When the power is turned on, the components on the circuit board will heat up, and moisture will be dissipated to prevent short-circuit failures. Some components, especially electrolytic capacitors, will leakage and deteriorate if they are not powered on for a long time. Therefore, it should be used often (powered-up) and not left unused for a long time.

Because a router is a small computer, it uses memory, CPU, and memory chips (similar to hard drives). The router is a combination of a switch and a computer, and in the era when the router was not popular, the Internet café used a bunch of hubs and a computer to achieve shared Internet access. You can log in to the router's settings screen as if you were operating the computer in the router, except that the computer is only responsible for dialing up the Internet and allocating network resources for you.

Because the router needs to have a routing function, and routing in the network involves computing, it needs a CPU with computing function. Moreover, the state of the port needs to be controlled in the router, etc., which involves control, so there is a CPU with control function.

As long as you can see that it's not just a mechanical structure, it's something that involves control, settings, calculations, it has its own CPU, and sometimes it's just called different, like your electronic watch, he also has it, and your home automatic washing machine, almost all household appliances will have it.

In case of leakage or direct short circuit with the chassis, it is life-threatening.

Prevent leakage and static electricity to protect the safety of personal treasures.

Not all appliances have to be grounded. The most direct thing in household appliances is that the power cord with three feet must be grounded, but the induction cooker, TV, hair dryer, stereo, etc. do not need to be grounded, and the shell of it is plastic, which will not hurt people when the electrical appliance leaks.

The shells of electrical appliances such as air conditioners, water heaters, and washing machines are metal, which will cause harm to the human body when electricity leaks.

The purpose of grounding is to introduce the leakage electricity into the earth, and the family with the installation of leakage protector can also be directly cut off to avoid electric shock accidents.

CPU is not to say that production is produced Intel has a history of decades Besides, CPU can't be ghosted, and CPUs like i5 i7 are all civilian and not military, what are you afraid of.

Due to the poor insulation performance of household appliances or the humid use environment, the shell of the household appliances will have a certain amount of static electricity, and in serious cases, electric shock accidents will occur. In order to avoid accidents, a wire can be connected to the metal shell of the electrical appliance, and the other end of the wire is connected to the ground, and the grounding wire will bring static electricity into the ground and release it once the electrical leakage occurs. In addition, it is more important for electrical maintenance personnel to use the soldering iron to solder the circuit, sometimes because the electric soldering iron is charged and the integrated circuit in the electrical appliance is damaged.

Friends who use computers sometimes ignore the grounding of the main chassis, in fact, the grounding of the main chassis of the computer can prevent the occurrence of crashes to a certain extent.

Grounding wires in the power system: It is an important tool to guarantee workers in the event of an unexpected voltage on equipment and lines that have been powered out. According to the ministry, the grounding wire must be made of bare copper flexible wire of more than 25mm2.

The grounding wire is connected to the metal housing. In case the metal shell of the electrical appliance is dotted, if there is no ground wire, then the person and the earth will form a loop, and the person will have an electric current flowing through the human body, and the person will be electrified. With the ground wire, when a person touches a live metal shell, because the resistance of the person is greater than the resistance of the wire, it can be considered that the ground wire shorts the resistance of the person, and the person has no current.

I also wonder that the three-pin socket has been grounded, and it needs to be grounded again for good electrical appliances.

This has nothing to do with leakage.

If the metal shell is not grounded, then due to the electrical power during the working process, due to leakage or actual live events, the surface of the casing will gather a lot of charges! That's the real reason!

When these charges reach a certain level, they will form a higher electric potential, and when people come into contact, they will be connected to the earth, and the charges will flow through the human body in large quantities, exceeding the limit current, which will cause danger to human life.

If the ground wire is grounded, the charge that is normally generated on the outer shell will flow into the earth, and it will not accumulate and harm the human body.