Thermostatic expansion valve with one-way control function

Abstract

The invention discloses a thermostatic expansion valve with the one-way control function. The thermostatic expansion valve with the one-way control function is characterized in that a valve body (1) further comprises a containing portion (16) extending to the inner portion of the valve body (1) from an inlet channel (11), a second valve port (15) is formed in the containing portion (16), a second valve element component (5) is arranged in the containing portion (16), an inner cavity (13) is communicated with an outlet channel (12) through a first communicating channel (31), the containing portion (16) is communicated with the outlet channel (12) through a second communicating channel (32), the outlet channel (12) and the first communicating channel (31) are arranged in a parallel communicated mode, and the outlet channel (12) and the second communicating channel (32) are arranged in a parallel communicating mode. Compared with the prior art, the thermostatic expansion valve with the one-way control function has the advantages that the containing portion of the second valve element component is an extending portion of an inlet channel on the valve body, a hole does not need to be formed additionally, the structure is convenient to machine, the second valve element component is simple and reliable in installation, and the hidden danger of outward leakage is reduced; meanwhile, the first communicating channel and the second communicating channel are arranged parallel to the outlet channel in a communicated mode, so that the resistance of fluid is reduced and the environment of a flow path system is improved.

Description

technical field [0001] The invention belongs to a refrigeration control system, in particular to a thermal expansion valve with a single control function used in an air conditioning system. Background technique [0002] Thermal expansion valves are usually used in heat pump control systems. In heat pump control systems, the refrigerant can generally flow in reverse to achieve the functions of cooling and heating. The thermal expansion valves in the prior art are generally set in one direction, and the one-way valve is set on the external bypass. to the valve. When the system flows forward, the one-way valve is closed, and the medium is throttled through the expansion valve. When the system is flowing in the reverse direction, the one-way valve is opened, and the medium flows through the one-way valve. But the separate one-way valve and bypass channel Will increase installation costs and maintenance costs, the potential for leakage will increase. [0003] Therefore, in rece...

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Problems solved by technology

[0004] Although the above structure can integrate a single expansion valve and a one-way valve into an integrated structure, it is necessary to process an opening on the valve body to install a nut cover and install a one-way valve device, which may easily cause leakage of the expansion valve, and the product is reliable. sex decline

Moreover, the structure is complex and requires high processing technology.

At the same time, the flow path with one-way open channel in the prior art is complicated and has a large flow resistance, which has an adverse effect on the system

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