Valve device

Abstract

The invention discloses a valve device which comprises a drive component and a valve base component. The valve base component is provided with an inlet, an outlet and a valve port communicating with the outlet, and the inlet communicates with a valve cavity. The valve device further comprises a sliding block supported by the valve base component, and the bottom face of the sliding block is attached to the top face of the valve base component. The sliding block is provided with a plurality of runner holes distributed in the circumferential direction of the rotation center of the sliding block,an opening slot and a blocking part. Hole diameters of the runner holes are not completely identical and are smaller than the drift diameter of the valve port. The circulation area of the opening slotis not smaller than that of the valve port, and the runner holes and the opening slot communicate with the valve cavity. The drive component can drive the sliding block to rotate relative to the valve base component to enable the runner holes or the opening slot to communicate with the outlet, or to enable the blocking part to close the outlet. The flow deviation of the valve device can be controlled to be within a small range so that the flow precision control requirements of a refrigerator and a similar small refrigeration system can be met, moreover, the function of completely opening thevalve port is achieved, defrosting can be carried out on the surface of an evaporator, humidity in the refrigerator is increased, and the preservation effect of the refrigerator is improved.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to a valve device used 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,...

AI Technical Summary

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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