Expansion valve having two-way valve functions

Abstract

An expansion valve having two-way valve functions is utilized in a heat pump system in the technical field of valve structures, and comprises a temperature sensing device, a valve body, an output channel which is arranged on the valve body and connected with an evaporator exhaust pipe, a first inlet / outlet pipe and a second inlet / outlet pipe which are connected with an evaporator respectively, a throttle, an ejection rod which is used for adjusting the throttle, and four one-way valves, wherein the temperature sensing device is communicated with the output channel; one end of the ejection rod is contacted with the temperature sensing device, and the other end of the ejection rod is contacted with the throttle; the four one-way valves form a bridge pipeline structure; a first inlet end and a first outlet end of a bridge pipeline are communicated with the first inlet / outlet pipe; a second inlet end and a second outlet end of the bridge pipeline are communicated with the second inlet / outlet pipe; the first inlet end and the second inlet end are communicated with an inlet end of the throttle; and the first outlet end and the second outlet end are communicated with an outlet end of the throttle. The expansion valve has two-way circulating and throttling functions, and can work stably in an environment with greater vibration.

Description

technical field [0001] The invention relates to an expansion valve with two-way valve function used in a heat pump system in the field of valve structure technology. Background technique [0002] In the cooling and heating dual-purpose heat pump air conditioning system, two expansion valves are usually combined, one of which is cooling and the other expansion valve is heating to adapt to the flow of refrigerant, and the conversion between cooling and heating functions is through a Four-way valve to switch. [0003] After searching the prior art, it was found that the Chinese Patent Document No. CN2931997, published on 2007-08-08, records a thermal expansion valve with the function of a check valve. A one-way valve hole, the upper end of the one-way valve hole communicates with the inlet, the lower end of the one-way valve hole communicates with the outlet, and a one-way valve stem matched with the valve hole is arranged in the one-way valve hole. However, this technology c...

AI Technical Summary

Problems solved by technology

However, this technology uses four one-way valves connected to one expansion valve, which has poor integration, cumbersome installation and error-prone, and takes up a lot of space in the air-conditioning system and costs a lot.

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