Fixing structure of valve body of expansion valve

Abstract

The invention provides a fixing structure of a valve body of an expansion valve. The fixing structure comprises a valve body and a coil. The lower end of the valve body is inserted in an inner hole of the coil, the upper end of the valve body is provided with a longitudinal connecting pipe and a transverse connecting pipe, the coil is coated with a layer of plastic shell, the upper end face of the plastic shell is provided with a clamping block, and a clamping groove used for connecting the transverse connecting pipe in a clamping mode is formed in the clamping block. According to the fixing structure of the valve body of the expansion valve, the plastic shell with the clamping block is arranged on the outer shell of the coil in an injection molding mode, the transverse connecting pipe of the valve body is connected into the clamping groove of the clamping block in a clamping mode to achieve axial positioning and circumferential positioning of the valve body and the coil, and therefore the valve body is fixedly connected with the coil. The fixing structure of the valve body of the expansion valve is convenient to assemble, and capable of effectively improving production efficiency and reducing production cost. The plastic shell is arranged on the outer shell of the coil, so that an original metal outer shell of the coil is prevented from being rusted and corroded, and the service life of the expansion valve is effectively prolonged; in addition, the plastic shell can play a role in suppressing noise, and effectively reduce working noise of the electronic expansion valve.

Description

technical field [0001] The invention relates to an expansion valve, in particular to a fixing structure for fixing the valve body of the expansion valve. Background technique [0002] Refrigeration systems such as air conditioners are usually mainly composed of compressors, evaporators and various regulating valve bodies, among which the electronic expansion valve is a key component for regulating the flow rate in the refrigeration system. The electronic expansion valve is mainly composed of a coil part and a valve body part. The valve body part is equivalent to the rotor part of the stepping motor, and the coil is equivalent to the stator part of the stepping motor. By applying a pulse drive signal to the coil winding, the magnetic conductor of the coil A regular magnetic field is generated on the pole claw, which drives the rotation of the rotor inside the valve body to adjust the flow rate at the valve port of the valve body, thereby realizing the control of the flow rate...

AI Technical Summary

Problems solved by technology

Using the above method to connect the valve body and the coil structure is relatively complicated. The connection between the fixed plate and the positioning piece, and the shell of the positioning piece and the coil needs to be connected by riveting or welding. The production process is relatively complicated, which makes the electronic expansion valve in production. The production efficiency in the process becomes lower and the production cost increases

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