变频空调和定频空调的区别是什么（...

2023年4月23日发(作者：中国十大豪宅别墅)

变频空调和定频空调的区别是什么（What is the difference

between variable frequency air conditioner and fixed frequency

air conditioner）

Summer air conditioning is everyone's favorite, currently has

two air conditioning popular respectively inverter air

conditioner and fixed frequency air conditioners, inverter air

conditioner and air conditioning for there are a lot of people

do not understand, what is the difference between the fixed

frequency inverter air conditioner and air conditioning, which

is a lot of people in the purchase of basic information to

understand the air conditioning the following is to tell the

difference between you and the inverter air conditioner with

fixed frequency air conditioner is what.

Inverter air conditioner

The general air conditioner due to power frequency 50Hz is fixed,

so the speed of the compressor is fixed, which is called "air

conditioner refrigerant (Freon) of the blood circulation is

constant, within a certain period of time in the circulation

of the refrigerant is bigger, the output power of air

conditioner is higher. In other words, the speed of the

compressor determines the output power of the air conditioner.

The frequency conversion air conditioner is a kind of air

conditioner using frequency conversion compressor and fuzzy

control technology. It can adjust the speed of refrigeration

according to the change of indoor temperature. It has the

characteristics of low noise and low energy consumption. A room

of 15 square meters, frequency conversion air-conditioning

speed than the fixed rate of 6-10 minutes faster. When the set

temperature is reached, the frequency conversion air

conditioner can operate at a low speed only for the fixed

frequency air conditioner 10%, so as to adjust the temperature,

the slight loss and maintain the constant temperature state.

Test shows that, compared with fixed frequency

air-conditioning, inverter air conditioner noise is low 5-6

decibels, long life of 5-8 years, is the future direction of

air-conditioning market. Variable frequency air conditioning

is relative to ordinary air-conditioning, the ordinary air

conditioning compressor motor adopts AC asynchronous motor,

the speed is constant, 50HZ, the speed is about 2880r/min. The

first inverter air conditioner is single-phase AC power

transformation of 220V or 50HZ become three-phase variable

frequency AC power (25~118HZ, 56~160), the supply of the

compressor, through the frequency change to adjust the

compressor speed, the cooling capacity of continuous change,

adapt to the needs of the air conditioning load.

1. Control principle and main characteristics of inverter air

conditioner

The main difference between inverter air conditioner and

ordinary air conditioner or fixed speed air conditioner is that

the former has increased the frequency converter. The

microcomputer of the frequency conversion air conditioner

collects the relevant information of the indoor environment at

any time, compares with the internal setting value, and outputs

the control signal by operation and processing. The working

principle of AC inverter air conditioner is the alternating

current into direct current power supply, and send it to the

power module (power transistor switch); the control signal sent

by the microcomputer control module at the same time,

alternating power output frequency adjustable (waveform

approximation is Xian Bo), so that the compressor motor speed

varies with power frequency for the corresponding changes, so

as to control the displacement of the compressor, refrigeration

or heating. DC inverter air conditioner also AC into DC power

supply, and sent to the power module, the module control signal

sent by the same microcomputer control, the DC power output

module (no controlled inverter) DC motor to the compressor, the

compressor displacement control, the DC inverter air

conditioner more power less noise. Inverter air conditioner

compressor by frequency conversion motor drive, power inverter

output frequency changes the alternating current to the motor,

the motor speed according to the needs of indoor cooling

capacity and the continuous change, automatic control of

refrigeration compressor to achieve continuous changes in the

final. In order to cope with the continuous change of the

cooling capacity, an electronic expansion valve is adopted in

the refrigeration system, and the refrigerant flow into the

evaporator is controlled quickly by the pulse motor switching

valve core.

2, inverter air conditioning, its main features

It can make the compressor motor stepless speed adjustable, its

speed is proportional to the change according to the indoor air

conditioning load, when the room needs rapid cooling (or rapid

warming), air conditioning load increases, the compressor

speed is accelerated, the refrigeration capacity (or heating)

will increase proportionally, when the temperature reaches the

setting. Then at high speeds to maintain room temperature

basically unchanged. The throttle of inverter air conditioner

is the use of electronic expansion valve control flow, it can

open the outdoor microprocessor to control the valve according

to the collected temperature sensor arranged in the expansion

valve and compressor gas import and export management office

information, at any time to change the flow of refrigerant.

The speed of the compressor corresponds to the opening of the

expansion valve, so as to maximize the capacity of the

evaporator. At the same time, due to the use of electronic

expansion valve as a throttling element, the defrosting does

not stop, the use of heat from the compressor exhaust heat to

the room first, the remaining heat to the outdoor, the heat

exchanger fin frost melting. Variable frequency air

conditioning will gradually replace the traditional constant

speed air conditioning, becoming the mainstream of air

conditioning control technology development. The frequency

conversion technology has been changed from AC to DC, and the

control technology has been developed from PWM (pulse width

modulation) to PAM (pulse amplitude modulation). By using the

upper limit speed of compressor speed control mode of PWM,

generally not more than 7000 rpm, and the compressor speed

control mode of PAM can be increased by about 1.5 times, thus

greatly improving the cooling capacity of refrigeration and low

temperature.

Two, fixed frequency air conditioning

Fixed frequency air conditioner is a unit used to provide air

temperature changes in a space area (usually closed). Its

function is to adjust the temperature, humidity, cleanliness

and air flow rate of the room (or enclosed space, area) to meet

the requirements of human comfort or process. Is the national

home network voltage of 220 volts, 50 Hz, in this condition the

work of air conditioning called fixed frequency air

conditioning. Because of the power supply frequency can not be

changed, the traditional fixed frequency air conditioner

compressor speed unchanged, by constantly ", stop the

compressor to adjust the indoor temperature, the opening and

closing are easy to cause the temperature sometimes hot and

sometimes cold and consume more power.

1, fixed frequency air conditioner working principle

Air conditioning is divided into cold air conditioning and heat

pump, the working principle is the same, the general use of

freon refrigerant air conditioning. Freon is characterized by

the release of large amounts of heat when the gas is changed

into liquid. When a liquid is converted into a gas, it absorbs

a lot of heat. Air conditioning is based on the principle of

design. The compressor compresses the gaseous refrigerant into

a liquid refrigerant of high temperature and high pressure, and

then is sent to the condenser (outdoor unit) to become a liquid

refrigerant at normal temperature and high pressure.

And then to the capillary into the evaporator (indoor), because

of the space refrigerant from the evaporator to the capillary

after a sudden increase of pressure decreases, the refrigerant

will vaporize liquid into gaseous refrigerant, low temperature,

so as to absorb a large amount of heat, the evaporator will

become cold, fan indoor indoor air from the evaporator in the

wind, so the indoor machine the wind is blowing out; it

condenses into drops of water vapour in the air meets cold

evaporator, along the pipe flow out, this is the reason why air

conditioning will water. When heating, there is a component

called the four way valve, so that the refrigerant in the

condenser and evaporator flow direction and refrigeration when

the opposite, so when the heating, outdoor blowing cold air,

indoor machine blowing hot air. In fact, the use of junior high

school physics in the liquefied (from gas to liquid) to

discharge heat and vaporization (from liquid to gas) to absorb

the principle of heat. The power grid voltage of the country

is 220 volts and 50 Hz. The air conditioner under this condition

is called fixed frequency air conditioner.