Electrically operated valve and heat exchange device comprising same

Abstract

The invention discloses an electrically operated valve. The electrically operated valve comprises a valve plug base (1) which is provided with a valve plug cavity and a valve port (11) communicated with the valve plug cavity, and a valve needle (2) which is extended into the valve plug cavity and is matched with the valve port (11); a lead screw (3) is connected with the upper part of the valve needle (2); and a pilot sleeve (4) is arranged outside the lead screw (3) and is fixedly connected with the valve plug base (1). By the electrically operated valve, the concentricity between the pilot sleeve (4) and the valve port (11) can be improved so that the sealing performance between the valve needle (2) and the valve port (11) can be improved and the frictional resistance during rotation of a rotator (6) can be reduced. Moreover, the invention also discloses a heat exchange device comprising the electrically operated valve.

Description

technical field [0001] The invention relates to the technical field of flow control components, in particular to an electric valve. In addition, the present invention also relates to a heat exchange device comprising the above electric valve. Background technique [0002] In the field of refrigeration technology, the electric valve is the refrigerant flow control part of the refrigeration equipment. Its working process is generally: the electric valve is opened or closed in the refrigeration equipment system such as air conditioners, so as to control the circulation and interruption of the refrigerant, and can also adjust the flow of the refrigerant. size. Of course, the scope of application of the electric valve is not limited to the above-mentioned refrigeration technology field, for example, it is also widely used in the hydraulic field. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a typical electric valve in the prior art. [...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned prior art, the guide sleeve 4' is bent at the lower part and connected with the stretched valve seat 9'. Since the forming precision of the stretched valve seat 9' is not high, the valve port 1'1 of the valve core seat 1' is connected with the stretched valve seat 9'. There is an assembly coaxiality error between the stretched valve seat 9', which in turn leads to a large coaxiality error between the valve port 1'1 and the guide sleeve 4'

In addition, the bending structure of the lower end of the guide sleeve 4' is relatively complicated, and the machining accuracy is difficult to guarantee. On the one hand, the manufacturing cost is increased, and on the other hand, the distance between the guide sleeve 4' and the valve port 1'1 is also increased. Concentricity error

[0007] There is a large coaxiality error between the guide sleeve 4' and the valve port 1'1, which will lead to a large coaxiality error between the valve needle 2' and the valve port 1'1, which will cause the valve port 1' 1 Problems such as poor sealing and eccentric wear

In addition, there is a large coaxiality error between the guide sleeve 4' and the valve port 1'1, which will also increase the frictional resistance when the rotor 6' rotates, thereby affecting the reliability of the electric valve.

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