Why should the air conditioner be heated first and then dissipated after the heat dissipation?

This friend, refrigeration and heating are at the same time, but some people like to talk about cooling first, and some people like to talk about heating first.

Conversion of cooling and heating:

The so-called "single cooling" machine, itself can also make heating, as long as the outdoor unit and the indoor unit are transferred in winter, but this is very unrealistic, firstly, it is impossible to adjust it every year, to be manual, and secondly, it is too noisy to put the compressor indoors, hehe.

Originally, after the compressor came out, it first ran to the outdoor heat exchanger to release heat, and in winter, it became the first to run indoors to release heat.

And the realization of the conversion is the four-way valve, if you are really interested in learning more about it, then contact.

Because the air conditioner is designed with an anti-cold wind function, it will be very cold when the fan is turned on in winter.

The first heat is to start the compressor, and then the cooling is to dissipate heat from the compressor.

This is based on the operating characteristics of the refrigerant; The compressor compresses the F22 refrigerant into a high-pressure and high-temperature liquid, sends it to the condenser for heat dissipation, throttles through the capillary tube and then changes from liquid to vapor, and the heat lost by the refrigerant is compensated by heat absorption through the evaporator.

Coming out of the compressor, the refrigerant becomes a gas at high temperature and pressure.

It is changed into a low-temperature and high-pressure liquid through the condenser.

After throttling, it becomes a gas-liquid state with low temperature and low pressure.

After the evaporator, it becomes a gas at low temperature and low pressure.

Refrigeration is phase change refrigeration, which relies on liquid vaporization to absorb heat.

Looking at the flowers in the fog, I don't know what to do. Do you dare to go into more detail about the question?

In the heating mode, it is normal for the air conditioner to be turned on for a while before it gets hot, there are two reasons for this, one is that the compressor of the external unit has begun to work after the remote control is turned on, but the internal unit is not immediately out of the hot air, it needs to heat the heat sink of the internal machine to a certain temperature before the fan of the internal machine will work, the second is that the compressor will have a delay of about 3 minutes to start the machine when the remote control is started, and the heat sink of the internal unit will be heated to a certain temperature after starting, and the hot air will be felt for a longer time in this case. However, both of these situations are normal and there is no need to worry. Unless you feel that the heating effect is not good, then consider adding liquid.

It takes a while for the air conditioner to heat up after it is turned on, which is a manifestation of humanized design. The so-called heating is to use a fan to blow out the heat of the heating pipe. Therefore, when the air conditioner is just turned on for heating, the heating pipe should be heated first, and then the heating pipe will be heated before it starts to blow.

If the heating pipe starts to blow before it is heated, it is cold air, which makes people uncomfortable.

As for adding fluid, you mean adding fluoride, right? Places that buy and sell second-hand air conditioners can be added. **I don't know.

Generally, air conditioners are like this, preheat first and then blow the air, which is normal.

Heating: At present, there are two main types of air conditioners that are more popular. One is the heat pump air conditioner, which uses the principle of air conditioning in summer refrigeration, that is, air conditioning in summer, indoor refrigeration, outdoor heat dissipation, and in autumn and winter heating, the direction is opposite to summer, indoor heating, outdoor refrigeration to achieve the purpose of heating.

Its advantage is that the efficacy is higher, and the disadvantage is that the applicable temperature range is smaller, and it will generally stop working when the temperature is below minus 5 degrees. There is also an electric-assisted heat pump air conditioner, that is, on the basis of the heat pump air conditioner, the electric heating element is added, and a small amount of electric heating is used to supplement the shortcomings of insufficient energy when the heat pump is heated, which can effectively reduce the power consumption of simple electric heating, and can reach the temperature range compared with the use of a simple heat pump.

In recent years, with the development of technology in the air-conditioning industry, the heating capacity of air-conditioning and heating has also made great breakthroughs. For example, Galanz air conditioning and heating are specially equipped with an intelligent freezing point heating system and auxiliary electric heater, which can create a mild and comfortable indoor environment like heating and heaters in the cold winter, when the outdoor is in an ultra-low temperature environment. In order to improve the heating effect of air conditioning heat pumps, Galanz, which entered the market from a high starting point, adopted thyristor fans for the first batch of air conditioners to accurately regulate the speed, so that the cold and warm air conditioners can also be heated stably and efficiently without auxiliary electric heating in the low temperature environment below zero, and at the same time effectively overcome the disadvantages of the general air conditioner in the low temperature environment, such as the decline of heat exchange effect, the icing of the indoor unit, and the overload of the compressor; Galanz air conditioning and heating outdoor unit also has a built-in defrosting circuit board, so that the air conditioner can automatically remove the frost on the outdoor unit before heating, eliminating the hidden danger that the air conditioner cannot heat due to frost in winter.

In addition, in view of the low temperature in winter in many areas, Galanz intelligent air conditioner has a special design to prevent the delayed air supply from being blown out by the cold wind, so that the air conditioner can delay the air supply time when the heating is turned on, so as to ensure that the first gust of air sent out is the warm air.

Refrigeration: After the air conditioner is energized, the low-pressure steam of the refrigerant in the refrigeration system is sucked in by the compressor and compressed into high-pressure steam and discharged to the condenser. At the same time, the outdoor air drawn in by the axial fan flows through the condenser, taking away the heat released by the refrigerant, causing the high-pressure refrigerant vapor to condense into a high-pressure liquid.

The high-pressure liquid is sprayed into the evaporator after passing through the filter and throttling mechanism, and evaporates at the corresponding low pressure to absorb the surrounding heat. At the same time, the cross-flow fan continuously enters the ribs of the evaporator for heat exchange, and sends the cooled air to the room after heat release. In this way, the indoor air is constantly circulating and flowing to achieve the purpose of reducing the temperature.

If the temperature is too high, try to lower the temperature below 25 degrees.

When it gets cold, the air conditioner works normally, and when it gets hot, the air conditioner doesn't work properly. The biggest possibility is that the external condenser is dirty and blocked to cause poor heat dissipation, the compressor will be thermally protected during the working period, and the compressor will be started again after a period of natural cooling, and the air conditioner will be refrigerated until it is overheated again, and so on.

This must be a problem with the air conditioning.

This phenomenon is mostly caused by the indoor and outdoor units of the air conditioner being too dirty, or the fan speed slowing down. First of all, you should check whether the indoor unit filter is too dirty, it should be cleaned in time, if the outdoor unit wing-shaped aluminum foil heat sink is too dirty, it is best to rinse it up and down with a tap water pipe, and then turn on the machine to try how to, if not, you should check whether the fan speed is normal, if it is too slow, it is mostly due to the decrease in the capacity of the starting capacitor or the poor lubrication of the motor bearing, and the short circuit between the turns of the motor coil, which should be repaired and eliminated in time. If the outdoor unit is exposed to the sun for a long time, it is best to install a sun visor. ”

The raw material is alloy powder. After die-casting, the head is expanded, and then it is dequantified, polished and other processes. Polished.

The air conditioner condenser is when the air conditioner is cooling, the heat exchanger (also known as the heat exchanger) in the outdoor unit is called the condenser, and the heat exchanger in the indoor unit is called the evaporator. The exothermic process of the condenser converts the high-temperature and high-pressure gaseous freon with the air outdoors to become a low-temperature and high-pressure liquid freon.

Air conditioning evaporator and condenser are actually heat exchangers, which can be interchangeable because the function is the same, but there is a difference between the two, taking the air conditioning condenser of Century Dragon New Energy as an example:

1. The thickness of the two is different. The smaller the evaporator, the thicker the tube wall, and at the same time, the evaporator is thicker than the condenser.

2. The position of the placement is different. The condenser is generally on the lower side of the refrigeration unit, and the temperature is relatively high when touched by hand, while the evaporator generally has an insulation layer and two inlet and drain pipes.

3. The materials used are different. The evaporator shell is water, the pipe is refrigerant, and the temperature is relatively higher, so the material used in the evaporator is better than the condenser.

4. The size of the interface tube is different. The inlet and return pipes of the evaporator are the same, generally 100 pipes, indoor units, there are two 25 or 32 pipes connected, one is the inlet pipe and the other is the outlet pipe. There is also a small pipe that is a drain pipe.

Whether it is evaporation or condensation depends on the pressure condition. Refrigeration cycle: The gaseous refrigerant is compressed to a higher pressure and can absorb heat in a high-temperature environment, so it will condense and release heat in the condenser.

The liquid refrigerant becomes active after passing through the expansion valve and evaporates in the evaporator to absorb heat in a relatively low temperature environment. The same goes for heat pump cycles. That's the great thing about Carnot and the reverse Carnot cycle, that he discovered ways to transfer heat beyond temperature differences.

When the air conditioner uses the heat pump to circulate heating, the gas freon is pressurized by the compressor to become a high-temperature and high-pressure gas, which enters the heat exchanger of the indoor unit (condenser at this time) through the switch of the four-way valve, and the condensation liquefies and releases heat to become a liquid, and at the same time the indoor air is heated, so as to achieve the ultimate goal of increasing the indoor temperature. The liquid freon is depressurized by the throttling device, enters the heat exchanger of the outdoor unit (at this time, the evaporator), evaporates and vaporizes and absorbs heat to become a gas, and at the same time absorbs the heat of the outdoor air, and the freon that becomes a gas enters the compressor again to start the next cycle. This enables the exchange of evaporator and condenser.

The four-way reversing valve realizes the exchange of indoor and outdoor heat exchangers, that is, the exchange of condenser and evaporator. Take summer as an example: the compressor and the expansion valve work together to reduce the pressure and boiling point of the indoor evaporator, which can reach about 15 degrees Celsius to achieve refrigeration; At the same time, the pressure and condensation temperature of the outdoor condenser are increased, which can reach about 1045 degrees Celsius, and the heat release is realized.

The principle of air conditioning is to move the heat from the indoor to the outside through boiling and condensation.

Because refrigeration and heating is a reverse process, and in the heating mode, due to the existence of the four-way valve, the power on reversing, resulting in the deflection of the flow direction of the refrigerant from the compressor, the heat exchanger that flows through the outdoor unit in the refrigeration mode is the commonly said condenser, and then passes through the heat exchanger of the indoor unit - the refrigerant absorbs heat and evaporates, which is called the evaporator; At the same time, in the heating mode, due to the reversal of the four-way valve, the heat exchanger that flows through the indoor unit first is the so-called evaporator, which is now a condenser, and then after the heat exchanger of the outdoor unit, the original condenser now becomes an evaporator, so there is an interchange of the two devices, after all, because the function has changed.

Refrigeration principle:

Kano Cycle. A low-boiling working fluid called a refrigerant circulates through the four components of refrigeration.

The four major components are compressor, condenser, throttle valve, and evaporator.

The low-pressure gaseous working fluid enters the compressor and is compressed into a high-temperature and high-pressure gas, at which point the boiling point of the working fluid increases with the pressure (just like the highest temperature property of water when boiling at sea level). The working fluid with a high boiling point enters the condenser and begins to liquefy, at which point the working fluid releases heat and becomes a liquid. Next, before entering the evaporator, it passes through the throttle valve, and the throttle valve reduces the pressure of the working fluid, and the working fluid with reduced pressure begins to evaporate in the evaporator again, and then the working fluid absorbs heat and becomes a low-pressure gas.

Then it enters the compressor, and the refrigerant continues to circulate.

Through the gasification and liquefaction of the refrigerant, heat is transferred from the evaporator to the condenser.

The evaporator of the household air conditioner is indoors, and the condenser is outdoors to achieve refrigeration.

The refrigerator evaporator is inside the freezer, and the condenser dissipates heat outside, which is the coil that can be seen on the outside of the old refrigerator before.

Because the dryer uses the principle of evaporation, evaporation needs to be heated, so the dryer will heat up. The liquid storage dryer is a necessary equipment to ensure the normal operation of the compressor and refrigeration system.

Generally speaking, when the air conditioning system starts to work, the load is large, and the refrigerant circulation is also large, and when the work is for a period of time, the load will be reduced, and the required refrigerant dose will be reduced accordingly. Therefore, the liquid refrigerant in the reservoir is replenished when the load is high, and the liquid refrigerant can be stored when the load is small.

Because the principle of evaporation is used to use a dryer, evaporation needs to be heated, so it will generate heat.

In the air conditioning and refrigeration system, the function of the filter drier is to absorb the moisture in the refrigeration system, block the impurities in the system so that they cannot pass through, and prevent the ice and dirty blockage of the refrigeration system pipeline.

Since the most clogged part of the system is the capillary (or expansion valve), the filter drier is usually installed between the condenser and the capillary (or expansion valve). The filter drier used in air conditioners is coarser and shorter than that used in refrigerators. Filter drier is referred to as dryer, and there are two types: filter drier and filter.

The dryer is installed behind the condenser, and the compressor compresses the refrigerant, which produces a high-temperature, high-pressure gas into the condenser. The semi-mist refrigerant, which is cooled to about 70°C by the condenser, enters the dryer. So the dryer is very hot, and it's hot.

The dryer is a very important component in an air conditioner, although it is often overlooked. The automobile air conditioning system without the liquid reservoir dryer is deformed, the pressure cannot be stabilized, the capacity of the condenser cannot be fully utilized, and the evaporator expansion valve cannot work stably.

Because the refrigerant inside is hot, the temperature is generally around 50 to 60 degrees.

Haha, it was hot gas filtration at the time, and of course it was hot.

The principle of heat exchange, the heat in the car is brought out, of course, it is hot, and part of the heat of the compressor work is also in it.

The compressor compresses the gaseous freon into liquid freon at high temperature and high pressure, and then sends it to the condenser (outdoor unit) to dissipate heat and becomes liquid freon at medium temperature and medium pressure, so the outdoor unit blows hot air. The liquid freon enters the evaporator (indoor unit) through the capillary, the space suddenly increases, the pressure decreases, and the liquid freon will vaporize, (from liquid to gaseous state is an endothermic process), absorb a large amount of heat, the evaporator will become cold, and the fan of the indoor unit will blow the indoor air through the evaporator, so the indoor unit blows out of the cold air; When the water vapor in the air meets the cold evaporator, it will condense into water droplets and flow out down the water pipe, which is why the air conditioner will produce water. Then the gaseous freon returns to the compressor to continue compressing and continuing the cycle.

There is a component called the four-way valve during heating, so that the flow direction of Freon in the condenser and evaporator is opposite to that of refrigeration, so when heating, cold air is blown outdoors and hot air is blown in the indoor unit. In fact, it is the principle of expelling heat during liquefaction (changing from a gas to a liquid state) and absorbing heat during vaporization (from a liquid to a gas) that I learned in junior high school physics. Lithium bromide air conditioning refrigeration principle to be specially proposed here, lithium bromide air conditioning refrigeration refrigeration principle is different from compression air conditioning, absorption refrigeration used working fluid is usually a binary solution, composed of two substances with different boiling points.

Among them, the substances with low boiling point are refrigerants, and the substances with high boiling points are absorbents. Therefore, binary solutions are also known as refrigerant-absorbent working fluid pairs. A binary solution is a mixture of two substances that do not chemically interact with each other.

The various physical properties of this homogeneous mixture (e.g., pressure, temperature, concentration, etc.) are completely consistent throughout the mixture, and they cannot be separated into the original constituent substances by purely mechanical precipitation or centrifugation. The refrigeration principle is divided into two parts: 1. The binary solution is heated and boiled by the heat source in the generator to produce refrigerant vapor, which is condensed into a refrigerant liquid in the condenser. The liquid refrigerant enters the evaporator after being throttled through the U-shaped tube, and is sprayed under low pressure through the evaporator, and the liquid refrigerant evaporates to absorb the heat of the refrigerant and produce a refrigeration effect.

2. The concentrated solution flowing out of the generator flows into the absorber after being cooled down and depressurized by the heat exchanger, and mixed with the original solution of the absorber to become a concentrated solution of intermediate concentration. The intermediate concentration solution is conveyed by the absorber pump and sprayed, absorbing the refrigerant vapor from the evaporator into a dilute solution. The dilute solution is pumped from the generator to the generator, where it is regenerated by the heat source to form a concentrated solution again and enter the next cycle.

In summary, any refrigeration equipment has four major components (compressor, condenser, evaporator, throttling device), and the refrigerant absorbs or releases heat to achieve the effect of cooling or heating through physical state changes in the refrigerator.