Macrotype four-way reversing valve

Abstract

The invention discloses a four-way crossover valve, pertaining to a fluid control unit. Existing four-way crossover valves applied to large-scale air conditioning systems occupy large space, the stream is complex, a plurality of circuit control systems are required, failures tend to occur easily and the maintenance is inconvenient. The invention comprises a large-sized master valve and a control valve which is used to control the changeover of the large-sized master valve. The large-sized valve has a system connection tube. The control valve is connected with the large-sized mater valve through a control connection-tube; the control valve comprises a control master valve and a pilot valve. The pilot valve is connected with the control master valve through a capillary tube, and the control master valve is connected with the large-sized master valve through a control connection tube. The invention takes the original master valve, guide valve and electromagnetic coil as control-valve components to control the direction of refrigerant flow of the large-sized master valve; in respect of structure, the control-valve components are fixed on the large-sized master valve body directly; compared with the structure of a plurality of four-way crossover valves connected in parallel, the invention has the advantages of small room occupation, brief stream, control-friendly circuit, etc. In addition, the manufacturing cost is reduced and the invention is in compliance with trend of energy-conservation society.

Description

technical field [0001] The invention relates to a fluid control component, specifically a solenoid valve used in a heat pump air-conditioning and refrigeration system to control the flow direction of a refrigerating medium, especially a four-way reversing valve main valve with a pilot valve as a control valve component, thereby controlling a large Solenoid valve operated by main valve. Background technique [0002] The four-way reversing valve has a main valve and a pilot valve. The main valve is interposed in the refrigerant circuit composed of the compressor, condenser, indoor heat exchanger and outdoor heat exchanger. The main valve switches the direction of the refrigerant circuit to perform refrigeration. Heating switch. [0003] The structural principle of the existing solenoid valve scheme is as follows: figure 1 As shown, it consists of three parts: electromagnetic coil, pilot valve and main valve. Its structure and working principle are described as follows: [0...

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved and the technical task proposed by the present invention are to overcome the problems that the existing four-way reversing valve used in a large air-conditioning system occupies a large space, the flow path is complicated, multiple circuit control systems are required, and it is prone to failure and inconvenient maintenance. Defect, provide a large four-way reversing valve

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