Refrigerating unit and throttle device

Abstract

The invention discloses a throttle device possessing refrigerating throttling effect and an anti-blocking function. The throttle device comprises a front end throttling section and a back end pipeline connection section, wherein the front end throttling section has a throttling and anti-blocking function and is equipped with a throttling hole; outside the throttling hole is provided an inclined wall surface and thread grooves formed on the inclined wall surface; and the back end pipeline connection section has two sections of steps for pipeline connection. Blocking slag can be flushed by spiral impact of fluid in the pipeline, so a self anti-blocking function can be achieved; and the throttle device is simply structured with safety and reliability. The invention further discloses a refrigeration unit having the above throttle device.

Description

Technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a refrigeration unit and a throttling device thereof. Background technique [0002] In the refrigeration unit, the throttling device is an indispensable mechanism. At present, the commonly used throttling devices include capillary tubes, throttling orifices, electronic expansion valves, thermal expansion valves, etc. Among them, the throttling orifices are widely used because they have no mechanical moving parts and simple structure. [0003] However, in the process of use, if the device with a small flow rate, the orifice is very small, especially in the large-scale refrigeration unit, the motor cooling, lubricating oil cooling and other devices require very little cooling capacity, so the flow rate that needs to be throttled is also Very small, the natural orifice is also very small, its structure can refer to figure 1 Shown. [0004] However, due to the large volume o...

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Problems solved by technology

[0004] However, due to the large volume of large-scale refrigeration units, the cleanliness of the system cannot be completely free of slag. If these slag enter the orifice with the flow of refrigerant, it is likely to cause blockage of the orifice, resulting in the failure of the throttling effect, making the The refrigeration and cooling process cannot be carried out normally

[0005] At present, there is also a filter screen in front of the pipeline to prevent the entry of slag, but it undoubtedly increases the material. At the same time, because the filter screen is added to the pipeline system, welding leaks are added in the middle

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