Filter

Abstract

The invention provides a filter, which comprises an upper shell, a lower shell, a cylinder and a filtering core, wherein the upper shell and the lower shell are welded to the upper end and the lower end of the cylinder respectively, the filtering core is fixed in the cylinder, and comprises an adapter, a flat head, an inner core, a filtering membrane and an outer shell, the upper shell comprises an upstream gas discharge port, a downstream gas discharge port and a central circular hole, the flat head comprises a central hole and a guide pipe integrally formed at the central hole, the guide pipe extends upwards to the central circular hole of the upper shell, the guide pipe, the upper shell and the downstream gas discharge port are integrally connected through welding at the central circular hole of the upper shell, and the adapter is connected with the lower shell through welding. According to the invention, the upstream gas discharge port is communicated with the space between the periphery of the filtering core and the inner wall of the cylinder so as to achieve upstream gas discharge, and the downstream gas discharge port is in fluid communication with the guide pipe and the central hole of the flat head and the inner core so as to achieve downstream gas discharge; and the upstream liquid discharge port and the downstream liquid discharge port formed in the lower shell are used for discharging the accumulated liquid on the upstream side and the downstream side in the filter so as to recycle and reduce the waste of the expensive fluid.

Description

technical field [0001] The invention belongs to the technical field of filter devices, and in particular relates to a filter capable of simultaneously realizing upstream and downstream exhaust. Background technique [0002] Filters have been widely used in food, beverage, pharmaceutical, biotechnology, semiconductor and other industries to purify and remove impurities. When filtering and purifying the fluid, the particulate impurities in the fluid are trapped on the filter medium to obtain a clean filtrate. The removal of impurities is an important reference index for evaluating the filtering effect and the selection of filters. The control and removal of air bubbles inside the filter is also very important, because once the gas is trapped inside the filter, part of the space inside the filter will be occupied by the trapped gas, making it difficult for the fluid to be filtered to flow into the filter again, and the filtration rate will decrease; in addition, The gas existi...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the existing filter cannot realize upstream and downstream exhaust at the same time, and the exhaust element of the existing filter that can exhaust upstream and downstream has a complex structure and is prone to mixing raw material liquid and filtrate, the present invention provides A filter that can exhaust up and down, and the exhaust structure of the filter is simple

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