Valve device

Abstract

The invention discloses a valve device. The valve device comprises a driving part and a valve seat part, and further comprises a sliding block supported by the valve seat part, wherein an inlet and anoutlet are formed in the bottom of the valve seat part; a valve opening which communicates with the outlet is formed in the top of the valve seat part; the inlet communicates with a valve cavity through a circulation opening formed in the side part of the valve seat part; the bottom surface of the sliding block fits the top surface of the valve seat part; the sliding block is provided with a runner part and a blocking part which are arranged in the circumferential direction of the rotation center; the circulation areas of the runner part are different in the circumferential direction; the runner part communicates with the valve cavity; and the driving part can drive the sliding block to rotate relative to the valve seat part, so that the runner part communicates with the outlet or to theblocking part closes the outlet. According to the valve device, flow deviation can be controlled within a relatively small range, so that flow precision control requirement of 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...

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

Images