Valve device

Abstract

The invention discloses a valve device, which includes a driving part and a valve seat part, the valve seat part has an inlet and an outlet, and the inlet is communicated with a valve cavity; and a slider supported by the valve seat part, the The bottom surface of the slider is in contact with the top surface of the valve seat part; the slider has a flow channel portion and a blocking portion arranged circumferentially around its rotation center; along the circumferential direction, the flow area of ​​the flow channel portion is different ; the flow channel part is in communication with the valve cavity; the driving part can drive the slider to rotate relative to the valve seat part, so that the flow channel part is in communication with the outlet, or the blocking close the exit. By improving the structure of the flow regulating part, the valve device avoids the jamming phenomenon in the fully closed state, and enables the flow deviation of the valve device to be controlled within a small range, thereby meeting the flow accuracy of refrigerators and similar small refrigeration systems control needs.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to a valve device for flow regulation. Background technique [0002] With the adjustment of refrigerator energy efficiency standard test requirements, the energy efficiency requirements of refrigerators have been increased. Most of the throttling parts of existing refrigerators use capillary throttling. Since capillary tubes do not have the function of flow adjustment, the refrigeration system cannot achieve the best performance under different environmental conditions. Optimal operating conditions have a greater impact on energy efficiency. [0003] In the prior art, there is an electronic expansion valve for air conditioners applied to the refrigerator to realize the function of flow regulation, please refer to figure 1 , figure 1 It is a schematic cross-sectional view of an existing electronic expansion valve for an air conditioner. [0004] When working, thro...

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Problems solved by technology

[0006] However, the refrigeration capacity of the refrigerator is small, and accordingly, the adjustment range is also small. figure 1 When the electronic expansion valve shown uses the valve port 4' and the tapered valve needle 5' to adjust the flow rate, the deviation of the flow control accuracy must reach 20%, far exceeding the flow control accuracy required by the refrigerator

[0007] In addition, the refrigerator is an intermittent refrigeration equipment. After the temperature balance is reached, the compressor will stop, and the condenser will be closed after the shutdown. It cannot meet the internal leakage requirements of the refrigerator system. Even if the valve needle 5' can completely close the valve port 4', the valve port 4' and the valve needle 5' are easy to wear and affect the flow control accuracy, and are easy to get stuck

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