压缩机过热保护是为了防止压缩机因高温而受损或烧毁的一种安全机制。以下是导致压缩机过热保护触发的常见原因： The compressor overheat protection is a safety mechanism to prevent the compressor from being damaged or burned due to high temperature. The following are common reasons that cause the compressor overheat protection to be triggered:
制冷剂不足或过多 Insufficient or excessive refrigerant
- 制冷剂不足会导致向蒸发器提供的冷媒量减少，造成蒸发温度高，进而使压缩机吸入的制冷剂蒸气温度高，从而导致过热[4%. - Insufficient refrigerant will reduce the amount of refrigerant supplied to the evaporator, resulting in high evaporation temperature, which in turn makes the temperature of the refrigerant vapor sucked into the compressor high, leading to overheating [4%.
- 制冷剂过多则会使系统整体压力变高，高压压力升高，导致压缩机负荷变大，造成电流过大，引发过热保护. - Too much refrigerant will increase the overall system pressure, the high pressure will increase, the compressor load will increase, causing excessive current and triggering overheating protection.
系统堵塞或毛细管问题 System blockage or capillary problem
- 毛细管或系统的堵塞会导致制冷剂流量减少，蒸发压力降低，进而增加压缩机的功率和温度. - Blockage of the capillary tube or system will lead to a reduction in refrigerant flow, a decrease in evaporation pressure, and thus an increase in compressor power and temperature.
- 系统内部的堵塞，如杂质、水分、冷冻油变质等，会增加流动阻力，使压缩机工作压力异常，导致过热. - Blockages inside the system, such as impurities, moisture, deterioration of the refrigeration oil, etc., will increase the flow resistance, causing abnormal working pressure of the compressor and leading to overheating.
电源问题 Power Issues
- 电压过低会导致压缩机工作效率降低，功率增加，从而导致过热. - Low voltage will cause the compressor to work less efficiently and use more power, which can lead to overheating.
散热问题 Heat dissipation issues
- 外机散热不好，例如离墙太近、排风有遮挡、附近有热源辐射，外机的换热器过脏，或者外机风机不正常运转，都会影响散热效率，导致压缩机过热. - The heat dissipation of the outdoor unit is not good. For example, if it is too close to the wall, the exhaust is blocked, there is heat radiation nearby, the heat exchanger of the outdoor unit is too dirty, or the outdoor unit fan is not running normally, it will affect the heat dissipation efficiency and cause the compressor to overheat.
压缩机自身问题 Compressor itself problem
- 压缩机性能不良，包括机械故障如缺油等问题，会直接导致压缩机温度升高. - Poor compressor performance, including mechanical failures such as oil shortage, will directly lead to increased compressor temperature.
- 压缩机内部的故障，如轴承烧结、抱轴等，也会导致过热. - Faults inside the compressor, such as bearing sintering, shaft seizure, etc., can also cause overheating.
环境和安装问题 Environment and installation issues
- 安装位置和环境温度过高，也会影响压缩机的运行温度。例如，外机安装在高温环境中或没有足够的通风空间. - The installation location and the ambient temperature are too high, which will also affect the operating temperature of the compressor. For example, the outdoor unit is installed in a high temperature environment or there is not enough ventilation space.
电子膨胀阀问题 Electronic expansion valve problem
- 对于变频机，电子膨胀阀阀开度过小也可能导致排气温度过高，触发过热保护. - For variable frequency machines, a small opening of the electronic expansion valve may also cause the exhaust temperature to be too high, triggering overheat protection.
系统污染 System Pollution
- 系统内部的污染，如杂质、水分、冷冻油变质等，会增加流动阻力，使压缩机工作压力异常，进而导致过热. - Pollution inside the system, such as impurities, moisture, deterioration of refrigeration oil, etc., will increase flow resistance, causing abnormal working pressure of the compressor, leading to overheating.
这些原因都可能导致压缩机温度超过预设的安全限值，从而触发过热保护装置，自动停止压缩机的工作，以防止压缩机烧毁或其他严重损害。 These reasons may cause the compressor temperature to exceed the preset safety limit, thereby triggering the overheating protection device and automatically stopping the compressor to prevent the compressor from burning out or other serious damage.
