The core of the design of the trigger gun ventilation grip rear section is efficient heat dissipation. This rear section is mainly used in the gun barrel part of the high-temperature hot water cleaning machine. Since the working water temperature of the cleaning machine is as high as 100 degrees Celsius, if a conventional injection molded handle is used, the user will feel noticeably hot when holding it. For this reason, the ventilated grip adopts a unique hollow structure design, that is, an air layer is formed between the grip and the gun barrel, and the heat insulation properties of the air are used to effectively block heat transfer. At the same time, the hollow structure also enhances air circulation and promotes the rapid dissipation of heat. This dual heat dissipation mechanism significantly reduces the surface temperature of the grip, ensuring that the user will not feel hot even if operating for a long time, thereby improving the comfort and safety of use. The material of the ventilated grip is selected from high-performance engineering plastics, which has high temperature resistance and wear resistance. It can maintain stable physical properties in high temperature environments, further ensuring the durability and reliability of the product.