| 摘要 |
<p>A flow-adjusting valve comprising a valve base (1) and a valve rod (2). The valve base (1) has arranged within a valve cavity thereof a valve opening (121). The valve rod (2) opens or shuts the valve opening (121). The valve rod (2) is tube-shaped, and the lower part thereof is a cylinder. The valve base (1) has arranged at circumferential positions around the valve opening (121) a sealing stepped surface (123). A lower end face of the valve rod (2) is sealedly in contact with or disengaged from the sealing stepped surface (123). Furthermore, the valve opening (121) has protruding upwards along the axial direction thereof a sleeve protrusion part (122). The sealing stepped surface (123) is arranged within the sleeve protrusion part (122). The structure of flow-adjusting valve on the one hand balances a refrigerant pressure exerted along the axial direction of the valve rod (2) while on the other hand improves the service life and sealing performance of the valve rod (2).</p> |
