A full flow electronic expansion valve

Abstract

The invention discloses a full-flow electronic expansion valve, comprising a valve seat assembly and a valve core assembly, the valve core assembly is connected to the valve seat assembly, the valve seat assembly includes a valve seat, and the valve seat includes a valve chamber, a first channel and a second The channel, the valve cavity includes an upper cavity, a middle cavity and a lower cavity, the upper cavity communicates with the second channel, the lower cavity communicates with the first channel, and the upper cavity and the middle cavity are communicated or separated by the valve core assembly, The valve cavity is provided with a piston assembly that communicates or isolates the lower cavity and the second channel. The piston assembly is located between the middle cavity and the lower cavity. The piston assembly is provided with a throttle hole that communicates with the middle cavity and the lower cavity. The present invention integrates the functions of the conventional electronic expansion valve and the solenoid valve through an integrated parallel structure, which has a more compact structure and saves space. cost.

Description

technical field [0001] The invention belongs to the field of electronic expansion valves, in particular to a full-flow electronic expansion valve. Background technique [0002] At present, the new energy vehicle heat pump electric air conditioning system consists of an electric scroll compressor, an electronic expansion valve and a bypass solenoid valve in parallel to form a heat pump system. When the interior of the vehicle is cooled and the external condenser is heated, in order to achieve a large flow of refrigerant, At this time, the bypass solenoid valve is opened and the electronic expansion valve is closed; when the interior of the vehicle is heated, the external condenser is used as an evaporator, and the refrigerant flows in the system, the refrigerant in the system needs to be throttled, the solenoid valve is closed, and the electronic expansion valve controls flow of refrigerant. [0003] Because the electronic expansion valve and the solenoid valve are in a para...

AI Technical Summary

Problems solved by technology

[0003] Since the electronic expansion valve and the solenoid valve are connected in parallel and are located independently in the system, the entire system takes up a large space in the car. In the small cabin of the car engine, it is difficult to assemble and install the refrigeration parts, and it is inconvenient to debug.

In addition, this structure has many connection points, and the pipeline is a rigid connection, which has high rigidity and increases the risk of refrigerant leakage

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