Pilot Valve and Four-way Reversing Valve

A pilot valve, wherein the pilot valve comprises:

• a valve body, wherein the valve body is a cylinder formed by integrally stretching and having an open end and a closed end, the closed end is defined as a first end, the open end is defined as a second end, the first end of the valve body is provided with an inlet, an inside of the valve body is provided with a cavity, and the inlet is in communication with the cavity;
• an inlet pipe, connected with the first end of the valve body, wherein a pipe opening of the inlet pipe is in communication with the inlet;
• and
• a limiting structure, arranged between the first end of the valve body and the inlet pipe, wherein the limiting structure is used for limiting a relative position of the inlet pipe relative to the valve body;
• wherein an end face of the first end of the valve body is provided with a mounting hole section, the mounting hole section extends toward the inside of the valve body, the inlet pipe passes through the mounting hole section, the inlet is located in the mounting hole section, and the limiting structure is located between the mounting hole section and the inlet pipe;
• wherein the inlet pipe is provided with a second enlarged diameter section, the second enlarged diameter section comprises a first section and a second section that are connected to each other, the first section is located at an outer side of the mounting hole section, the second section penetrates into the mounting hole section, a diameter of the first section is larger than a diameter of the second section, and the diameter of the second section is smaller than a hole diameter of the mounting hole section.