Valve device and its valve block

Abstract

The invention discloses a valve device and its valve block. The valve block can rotate relative to the valve seat part of the valve device; and the lower body part located on the bottom surface of the plate-shaped part, the three are fixed as one; the plate-shaped part has a plurality of orifices with different diameters arranged circumferentially around the rotation center of the valve block; the said plate-shaped part The upper body part has a through cavity, and each of the throttle holes is directly connected with the through cavity; the lower body part has a plurality of communication holes corresponding to the positions of the plurality of throttle holes, and each of the communication holes The dimensions are larger than the orifice at the corresponding position; the upper body part and the lower body part are integrally formed on the plate-shaped part by injection molding. The structure of the valve block is favorable for processing and can ensure the precision of the orifice at the same time.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a valve device and a valve block thereof. Background technique [0002] For small-scale refrigeration systems, capillary throttling is often used. Because capillary tubes do not have the function of flow adjustment, the refrigeration system cannot achieve the best operating conditions under different environmental conditions, which has a great impact on energy efficiency. [0003] In order to meet the development needs of small-scale refrigeration systems, the existing electric switching valves are improved so that they can adjust the flow within a small deviation range, and the orifices for adjusting the flow are usually arranged on the valve block. [0004] Among them, the valve block is usually made of engineering plastics, and the diameter of the orifice is small, which is not suitable for direct injection molding. It needs to be machined. In actual use, the valve block...

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Problems solved by technology

[0004] Among them, the valve block is usually made of engineering plastics, and the diameter of the orifice is small, which is not suitable for direct injection molding and needs to be machined. In actual use, the valve block will rotate relative to the valve seat, so in order to ensure that the valve block Low friction coefficient, low wear, self-lubricating and other properties also need to add fillers such as glass fiber, carbon fiber and graphite to engineering plastics, and if the material contains fillers such as carbon fiber, it will cause the processed orifice to contain filaments. At the same time, the burrs at the orifice port due to the friction between the valve block and the valve seat are not easy to remove, which affects the accuracy of the orifice and the flow adjustment accuracy of the valve.

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