Valve device

Abstract

The invention discloses a valve device which comprises a driving part and a valve seat part, and further comprises a sliding block and a filtering part, wherein the valve seat part is provided with aninlet and an outlet; the inlet communicates with the valve cavity; the sliding block is supported by the valve seat part; the bottom surface of the sliding block fits the top surface of the valve seat part; the sliding block comprises flow channel parts and a blockage part which are circumferentially arranged around the rotating center of the sliding block; along the circumferential direction, the circulation areas of the flow channel parts are different; the flow channel parts communicate with a valve cavity; the sliding block can be driven by a driving part to rotate relative to the valve seat part, so that the flow channel parts can communicate with the outlet, or the outlet can be closed by the blockage part; and the filtering part is used for filtering a refrigerant which flows intothe flow channel parts. According to the valve device, the all-closed stuck phenomenon can be avoided through the structural improvement of a flow regulating part; furthermore, the flow deviation of the valve device can be controlled to be within a relatively small range; and accordingly, the requirements for the flow accuracy control of refrigerators and similar small-sized refrigerating systemscan 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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