Electronic expansion valve

Abstract

The invention provides an electronic expansion valve. The electronic expansion valve comprises a first valve seat, a second valve seat, a transverse connection pipe, a vertical connection pipe, a valve needle, a return spring and a driving mechanism. The second valve seat is fixedly arranged at the first end of the first valve seat. The middle of the second valve seat is provided with a middle channel. The first end of the second valve seat is provided with a main valve opening communicated with the middle channel. The second end of the second valve seat is provided with a guide hole communicated with the middle channel. The main valve opening and the guide hole are formed coaxially. The first end of the valve needle is arranged in the guide hole. The second end of the valve needle is provided with a stopping-blocking flange. The valve needle is provided with the return spring. The first end of the return spring is connected with the stopping-blocking flange in an abutted mode. The second end of the return spring is connected with the second valve seat in an abutted mode. The driving mechanism is arranged in the first valve seat. The second end of the valve needle is connected with the driving mechanism in an abutted mode and slides along the guide hole under the driving action of the driving mechanism to open or close the main valve opening. According to the electronic expansion valve, the problem that in the prior art, the coaxiality of a screw and a valve needle is difficult to ensure can be solved, the machining difficulty of the electronic expansion valve is lowered, and the machining cost is reduced.

Description

technical field [0001] The invention relates to an electronic expansion valve, in particular to an electronic expansion valve used in refrigeration systems such as air conditioners and refrigerators. Background technique [0002] In the air-conditioning market, due to the long distance between the indoor unit and the outdoor unit, two electronic expansion valves are generally used, and the two electronic expansion valves must be connected in parallel with check valves, so as to maximize the working efficiency of the air-conditioning system . [0003] In the electronic expansion valve of the prior art, the nut of the nut assembly is fixed in the guide sleeve, the guide sleeve is fixed on the valve seat, and the valve needle needs to be fixed in the valve port of the valve seat. The requirements are high, and the coaxiality between the valve core seat and the nut needs to be indirectly controlled through multiple assembly processes, and the coaxiality between the valve seat a...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an electronic expansion valve, which can overcome the problem that the coaxiality of the screw rod and the valve needle is difficult to ensure in the prior art, simplifies the structure of the electronic expansion valve, reduces the processing difficulty of the electronic expansion valve, and saves processing cost

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