Self-operated three-way valve

Abstract

The invention provides a self-operated three-way valve, which comprises a valve core part arranged in an inner cavity of a valve body, a spring part and a valve core blocking body, wherein a first end of the spring part is connected with one end of the valve core part, and a second end of the spring part is connected with a second end of the inner cavity of the valve body; the valve core blockingbody is arranged on the inner wall of the valve body and is placed on a position between a second air inlet pipe and a first air outlet pipe; and the valve core part is provided with a first positionwhich enables a first air inlet pipe to be communicated with the first air outlet pipe, and a second position which enables the second air inlet pipe is connected with the first air outlet pipe. The valve core part of the self-operated three-way valve is connected with the valve body through the spring part, and the change of the positions of the valve core part is realized through air intake of the first air inlet pipe or the second air inlet pipe and pressure difference of two ends of the valve core part brought by the air intake, so that changeover between different air inlet pipes and airoutlet pipes of the three-way valve is realized, the change of flow directions of channels in the valve body is realized through a simple structure, and the operation is reliable.

Description

technical field [0001] The invention relates to the field of fluid control, more specifically, to a self-operated three-way valve. Background technique [0002] The heat pipe / vapor compression composite refrigeration system is divided into two states: compressor refrigeration and natural circulation. Most of the existing automatic reversing valves have an electromagnetic or pneumatic pilot valve, which relies on the pilot valve to provide power to change the main valve. channel flow direction, its structure is relatively complicated, its production cost is relatively high, and its reliability is not ideal. [0003] In addition, in the prior art, the valve core of the self-operated three-way valve is made of polytetrafluoroethylene material. During the operation of the system, the valve core is often stuck due to the thermal expansion and contraction of the material itself, resulting in The valve cannot be reversed, and the reliability is not high, which eventually affects t...

AI Technical Summary

Problems solved by technology

[0002] The heat pipe / vapor compression composite refrigeration system is divided into two states: compressor refrigeration and natural circulation. Most of the existing automatic reversing valves have an electromagnetic or pneumatic pilot valve, which relies on the pilot valve to provide power to change the main valve. The channel flow direction, its structure is relatively complex, the production cost is relatively high, and the reliability is not ideal

[0003] In addition, in the prior art, the valve core of the self-operated three-way valve is made of polytetrafluoroethylene material. During the operation of the system, the valve core is often stuck due to the thermal expansion and contraction of the material itself, resulting in The valve cannot be reversed, and the reliability is not high, which will eventually affect the normal operation of the system

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