The 18 questions of air conditioning heating all understand you become an expert

1. Why is the colder the weather, the worse the heating effect?

A: Mainly because the colder the weather and the lower outdoor temperature, the difficulty of absorbing air from the outdoor air environment is more difficult, resulting in a relatively poor heating effect.

2. Why is it better to use other equipment to heat up below -5 degrees?

Answer: When heating air conditioners in winter, the air conditioner absorbs the heat of the outdoor air through the outdoor heat exchanger (ie, the condenser), and then transfers the heat to the indoors through the heat exchanger of the indoor unit (ie, the evaporator). At the same time, when heating, the outdoor heat exchanger is used as an evaporator. When the outdoor temperature is lower than -5 degrees, the heat exchange temperature difference between the condenser and the outdoor air will be close to zero. Therefore, there is no heat exchange effect, so the overall heating effect of the air conditioner is poor, and even heating cannot be performed. Therefore, it is necessary to activate the auxiliary electric heating function of the air conditioner or use other heating equipment.

3. Why should the air conditioner be defrosted?

A: In the winter heating, because the evaporation temperature of the outdoor heat exchanger (ie condenser) is lower than zero, the outdoor air flowing through the condenser will condense on the fins and frost, which will affect the condenser. The heat exchange area and the flow of air affect the heating effect of the air conditioner. Therefore, in order to ensure the heating effect of the air conditioner, it is necessary to perform the defrosting work.

4. How to judge whether an air conditioner heating is normal?

Answer: The standard of air conditioner refrigeration and heating inspection: after 15-20 minutes of starting, the temperature is measured by the inspection head of the thermometer at a distance of 10-20 mm from the indoor inlet and outlet. The temperature difference between the inlet and outlet of the cooling should be not less than 10 °C, in the heating state. The temperature difference between the inlet and outlet of the lower (heat pump type air conditioner) should not be less than 15 °C, and the temperature difference between the inlet and outlet of the electric auxiliary heat type air conditioner should be not less than 23 °C;

5, the temperature of the air outlet, why can not represent the machine is a problem?

A: The temperature of the air outlet is not used to determine and measure the standard of whether an air conditioner is normal. The standard for the determination and measurement of air conditioning is mainly to determine the temperature difference between the air inlet and the air outlet of the air conditioner during heating. As long as the temperature difference between the air inlet and the air outlet reaches the standard, we can determine that there is no problem with the air conditioner.

There are many other factors that determine the temperature of the air outlet to determine the difference between the machine and the environment, the temperature of the air in the room itself, and other external influences. The air conditioner itself has a certain power and the air volume is also certain. Judging the normality of the machine is mainly judged by their ability to improve the temperature of the passing air, that is, the temperature difference between the inlet and outlet. If the temperature of the air inlet itself is high, then the air outlet temperature It is high, on the contrary, the temperature is low, and the outlet temperature will be lower accordingly. It is a reason for the rise of the ship. Therefore, the temperature of the outlet is not used to assess and judge whether a machine is hot or not.

6. Why is the air conditioner always turned on, and to a certain extent, why is the temperature difficult to rise?

A: The room temperature is low, so the air conditioning heating is more obvious to the room temperature. As the room temperature increases, the difference between the indoor temperature and the outdoor temperature increases, so the more heat is transferred indoors to the outside, and the indoor temperature rises slowly. When the temperature difference reaches a certain level, the heat generated by the air conditioner is just transferred to the outside to neutralize, so at this level, the temperature will not rise any more.

7. Why does the air conditioner often hear the sound of squeaking when it is heating?

Answer: Most of the exterior parts of the air conditioner indoor unit are made of plastic. When heating (the same during cooling), the plastic parts expand and contract, and the sound generated by the small deformation of the casing is normal. This situation will slowly disappear after the plastic parts are shaped.

8. Why do the air conditioners sometimes have an odor?

Answer: (1) The taste of the newly renovated room is sucked into the air conditioner; (2) Other odor sources in the room are sucked into the air conditioner; (3) The newly installed machine has a slight plastic smell in a short period of time and will soon disappear; (4) The air conditioner air filter has not been cleaned for a long time.

9. Why is the indoor unit not flowing when heating, and the outdoor unit running?

A: Heating and cooling are just the opposite. The work of the indoor unit and the work of the outdoor unit are interchanged. When cooling, it is the indoor machine running water. The heating is just the opposite. The outdoor machine produces water. The generated water does not form condensed water flowing down the condenser fins, but forms frost. The frost is mainly caused by the ambient temperature being too cold. Attached to the fins, it is necessary to melt the defrosting before it can flow.

10. Why is the indoor unit sometimes loud and small?

A: There are two important situations in this situation. One case is that the air conditioner filter of the user may be dirty and the wind is uneven. In another case, when the air conditioner is heating, in order to ensure the air supply temperature in the air conditioner, the indoor The motor automatically adjusts the wind speed of the fan, resulting in a high wind and a low wind. Normally, when this problem occurs, you can check the filter first.

11. Why does the indoor unit occasionally have a “squeaky” sound when it is heated?

Answer: This is the state of the refrigerant that changes continuously during the operation of the air conditioner. The liquid state changes to a gaseous state, and the gas state changes to a liquid state. This normal physical imagination exists in the refrigerant at a certain speed. Due to a certain resistance, the ashes produce a certain "beep" sound of running water, which is a normal phenomenon, especially when the night is quiet.

12. Why does it take a while for the heat to start when the heat is turned on?

A: The main reason is that our machine has been designed with humanity and designed with anti-cold wind function. When heating, there is a process of heat accumulation and lifting. If the wind comes out, it will be cold wind. In the case that the winter itself is very cold, it is suddenly blown by the cold wind when starting up. People are very susceptible to colds. Under normal circumstances, the hot air will only come out after 3-5 minutes. The specific situation depends on the outdoor environment at that time.

13. When heating, why is the air conditioner still blowing after shutdown?

A: The main reason is that our air-conditioning design has the function of residual heat. When the machine is in use, once the fan is shut down, if the fan stops working immediately, there will be some residual heat in the machine, which will affect the utilization of heat, and secondly due to heat. Concentrated in the indoor unit, it is easy to deform some plastic parts.

14. Is the redness of the electricity when the electric auxiliary electric heating starts?

Answer: Under normal circumstances, the electric auxiliary electric heating pipe will not be red, but when the voltage is too high, or the low wind is running, or the filter is clogged, redness will occur. Check the voltage or clean the filter or set the high air operation. If it is partially red, the electric heating wire in the electric heating tube is not uniform, resulting in excessive local heat. It is normal for the user to explain the redness of the electric heating tube.

15. Why does it stop working when the heating temperature is not reached? What is the reason?

A: Because the hot air is light, it accumulates in the upper part of the room, and the temperature detected by the room temperature probe of the internal machine is higher than the temperature of the lower part of the room. Therefore, the set temperature of the remote control has a certain temperature difference from the room temperature. The temperature set by the remote control is 4~6°C higher than the ideal ambient temperature.

16. When heating in winter, the outdoor unit takes hot air, what is the leak?

A: This is the normal phenomenon that the air conditioner is defrosting.

Because the heat pump air conditioner needs to absorb heat from the outdoor through the outdoor heat exchanger during heating in winter, the surface temperature of the external heat exchanger is very low during operation, and the frosting is excessive, which will affect the heating effect, so the air conditioner It has a defrosting function, which is automatically controlled by the computer board of the air conditioner. The defrosting time is about 10 minutes. When the defrosting, the outdoor unit has molten water flowing down.

17. When heating, why does the indoor unit run for a while to stop the air supply, and automatically open in a few minutes?

A: This is the defrosting of the air conditioner. When the air conditioner is running for a period of time, the outdoor condenser will have a thick frost. If the frost is not melted, it will directly affect the heating effect of the air conditioner, so when the air conditioner is running 40 After reaching the defrosting condition for more than a minute, the air conditioner will defrost, and the indoor unit will stop working during the defrosting process, and will work again after the defrosting.

18. Why does the room temperature not reach the ideal effect when the air conditioner is turned on for half an hour?

(1) During this season, check if the air conditioner remote control is turned on. The remote control has a “dry auxiliary heat” button. When it is turned on, the air conditioner remote control will display “auxiliary heat”. At this time, the auxiliary heat is turned on. Improve heating effect;

(2) The air conditioner can be adjusted to “super strong” gear, and the air-conditioning wind speed and compressor operating frequency are increased to further ensure the heating effect;

(3) When the air conditioner is heating, the wind guide vanes will blow downwards to ensure that the hot air is blown downwards. If the air conditioner guide vanes are not downward, adjust the air conditioner “up and down sweeping” to ensure that the air deflector is downward. Be better;

(4) Check how the air volume of the air conditioner is heated. If the air is small, it is recommended that the customer clean the filter. The filter plugging will also affect the air conditioning heating effect.

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