1, low pressure 0.45MP2, high pressure 2.5MP or more 3, static pressure 1.1-1.2MP, this is a normal situation, generally occurs in the old air conditioner used for three to four years. The air conditioner did not completely cool, but the cooling effect was reduced. This is because old-fashioned air conditioners use Freon as a refrigerant and will evaporate for a long time. Therefore, users only need to add a little to the regular air conditioning repair point. In addition, it does not rule out the problem of improper installation and Freon leakage and the machine itself.
Air conditioning does not cool the second reason: the power supply voltage is not enoughThe normal starting voltage of the air conditioner is 220V+-10%. In China's power supply system with phase voltage of 220V and line voltage of 380V, almost all compressors above 200V can be started. When it is above 180V, 70-80% can be started. When it is above 160V, only individual can start. I personally did experiments. It is almost impossible to start below 160V. According to experience, the compressor starting voltage is more reliable when it is above 190V.
Air conditioning does not cool the cause of the third: air conditioning power is not enoughThe general selection principle is: 150-250W/m2 for cooling and 250-350W/m2 for heating. In addition, factors such as space height, directional orientation, sealing performance and resident population should be considered.
The fourth reason for air conditioning not cooling: the external environment temperature is too highThere is a more common saying: When the outdoor unit is in an environment above 43°, most air conditioners are difficult to transfer the heat inside the room to the outside, resulting in no cooling.
Air conditioning does not cool the cause of five: air conditioning does not clean and maintain for a long timeIf the air conditioner can work normally and does not affect human health, it should also extend its life as much as possible. Obviously, it is impossible to ignore it once it is bought and installed. Because the outdoor unit is exposed to the outside, it is easy to absorb dust and debris. If it is not cleaned for a long time, it will affect the heat dissipation performance of the machine, resulting in a decrease in the cooling effect of the air conditioner. The indoor unit is related to the health of the human body. If it is not clean for a long time, it will breed bacteria, pollute the air, and make people sick.
The reason why the air conditioner does not cool is six: the copper tube connecting the indoor unit and the outdoor unit is too longThe maximum allowable length of the connecting line of the air conditioner shall not exceed 8 meters, the maximum length of 1.5-2 shall not exceed 10 meters, and the maximum length of 2 or more shall not exceed 15 meters. The height difference between indoor and outdoor units is no more than 5 meters.
All objects whose temperature is higher than absolute zero are constantly emitting infrared radiation energy into the surrounding space. The size of the infrared radiation energy of an object and its wavelength distribution are closely related to its surface temperature. Therefore, the surface temperature of the object can be accurately measured by measuring the infrared energy radiated by the object itself. This is the principle on which the infrared thermometer operates.
After the outbreak, measuring body temperature has become a convenient and intuitive way to find potentially infected people. Many regions require companies to prepare non-contact temperature measuring instruments when they resume work.
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