Vehicle electronic expansion valve with low-abrasion structure and vehicle

Abstract

The invention discloses a vehicle electronic expansion valve with a low-abrasion structure and a vehicle. The vehicle electronic expansion valve comprises a valve body assembly and a coil assembly; the valve body assembly comprises a valve seat and a valve element component; a valve element and a rotor which are coaxially arranged are arranged in a shell, a lead screw assembly is arranged betweenthe valve element and the rotor, a fixing part of the lead screw assembly is fixedly connected with the valve seat, the rotor is fixedly connected with the fixing part of the lead screw assembly, a movable part of the lead screw assembly is connected with the valve element, a fully-closed lower stop block is arranged on the fixing part of the lead screw assembly, a fully-closed upper stop block isarranged on the movable part of the lead screw assembly, and when the valve is fully closed, the abutting cross length of the fully-closed upper stop block and the fully-closed lower stop block is smaller than the thread pitch of threads. The vehicle electronic expansion valve is stable in performance, high in precision and long in service life, the output torque can be kept in a stable state allthe time, in addition, transmission threads can be prevented from being impacted and extruded by inertia action of a moving part when the valve is fully closed, abrasion of the threads is reduced, and the risk that the moving part of the valve is stuck is reduced.

Description

technical field [0001] The invention relates to an electronic expansion valve, which belongs to the technical field of expansion valves, in particular to a vehicle electronic expansion valve with a low wear structure and a vehicle using the electronic expansion valve. Background technique [0002] In the refrigeration system, the electronic expansion valve is installed between the liquid receiver and the evaporator, which throttles and decompresses the high-pressure liquid refrigerant from the liquid receiver, and regulates and controls the refrigerant flow into the evaporator. With the improvement of flow control accuracy requirements, electronic expansion valves are gradually used in automotive air conditioning systems, heat pump air conditioning systems and battery cooling systems. The driving method of the electronic expansion valve is that the controller calculates the parameters collected by the sensor, sends adjustment instructions to the drive board, and the drive bo...

AI Technical Summary

Problems solved by technology

[0007] The electronic expansion valve in this utility model patent uses bearings to fix the rotor, so that the rotor only rotates radially, and through thread transmission, the screw drives the valve core to move axially, reducing the weight of moving parts to reduce thread friction. However, this structure When the valve is fully closed, the valve port and the valve core are in contact, and then the transmission thread is tightened to complete the valve closing action. When the transmission thread is tightened, it is impacted and squeezed by the inertial action of the moving parts. After long-term operation, the thread wears and deforms seriously, which is easy to cause The valve is stuck and fails; at the same time, the contact between the valve port and the valve core is easy to wear and affect the product performance

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