通过一个由主要设备构成的制冷系统原理图来说明整个的制冷过程，在原理中用特效表示每个步骤的过程。我上传的就是一个制冷系统原理图的范本，你可以参考。---Here is the complete and accurate extraction of content from the image: **Chart/Diagram Description:** * **Type:** This is a schematic diagram or flowchart illustrating the principle of a refrigeration cycle. * **Overall Title:** 制冷循环原理图 (Refrigeration Cycle Schematic Diagram) * **Main Elements and Their Connections/Processes:** * **Compressor (压缩机):** Located on the right side of the diagram, depicted as a vertical cylindrical vessel with a wider base. * Input: Receives refrigerant from the evaporator via a light blue line with an arrow pointing towards it. * Output: Sends high-pressure refrigerant to the condenser via an orange line with an arrow pointing away from it. * Function: Compresses the refrigerant. * **Condenser (冷凝器):** Located at the top, depicted as a rectangular unit with vertical fins/lines inside. * Input: Receives high-pressure refrigerant from the compressor via an orange line with an arrow pointing towards it. * Output: Sends refrigerant to the expansion valve via a red line with an arrow pointing away from it. * Process: 冷凝 (Condensation) occurs inside. * Heat Transfer: 排热 (Heat Rejection) is indicated by an upward wavy plume with an arrow. * **Expansion Valve (膨胀阀):** Located on the left side, depicted as a complex cylindrical valve structure. * Input: Receives refrigerant from the condenser via a red line with an arrow pointing towards it. * Output: Sends low-pressure refrigerant to the evaporator via a blue line with an arrow pointing away from it. * Function: Reduces the pressure of the refrigerant. * **Evaporator (蒸发器):** Located at the bottom, depicted as a rectangular unit with vertical fins/lines inside, similar to the condenser. * Input: Receives low-pressure refrigerant from the expansion valve via a blue line with an arrow pointing towards it. * Output: Sends refrigerant to the compressor via a light blue line with an arrow pointing away from it. * Process: 蒸发 (Evaporation) occurs inside. * Heat Transfer: 吸热 (Heat Absorption) is indicated by an upward wavy plume with an arrow, suggesting heat is absorbed from the surroundings. * **Labels and Annotations:** * **高压 (High Pressure):** Label on the orange line segment between the compressor and the condenser. * **低压 (Low Pressure):** Label on the blue line segment between the expansion valve and the evaporator. * **@筑文说易:** A watermark or source annotation, located near the bottom right of the compressor. * **Flow Description:** The cycle begins with the compressor, which compresses low-pressure, gaseous refrigerant from the evaporator into high-pressure, high-temperature gas. This high-pressure gas then flows to the condenser (labeled "高压"), where it undergoes condensation (冷凝) and rejects heat (排热) to the surroundings, turning into a high-pressure liquid. The high-pressure liquid then passes through the expansion valve (膨胀阀), which reduces its pressure and temperature, resulting in a low-pressure liquid-vapor mixture (labeled "低压"). This low-pressure mixture enters the evaporator, where it absorbs heat (吸热) from the desired cooling space and evaporates (蒸发) back into a low-pressure gas. Finally, this low-pressure gas returns to the compressor, completing the refrigeration cycle.