Valve device

Abstract

The invention discloses a valve device. The valve device comprises a drive component and a valve base component. The valve base component is provided with an inlet and an outlet. The inlet communicates with a valve cavity. A sliding block supported through the valve base component is further included. The bottom face of the sliding block is attached to the top face of the valve base component. Thesliding block is provided with a runner part and a blockage part which are arranged around the rotation center of the sliding block in the circumferential direction. In the circumferential direction,the circulation areas of the runner part are different. The runner part communicates with the valve cavity. The drive component can drive the sliding block to rotate relative to the valve base component, accordingly, the runner part communicates with the outlet, or the blockage part closes the outlet. According to the valve device, through the structure improvement on a flow adjusting part, the phenomenon of jamming in the total-closing state is avoided; and the flow deviation of the valve device can be controlled within the small range, and accordingly the flow precision control requirementfor refrigerators and similar small refrigeration systems can be met.

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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