filter device

Abstract

The invention provides a filter device. The filter device comprises a first filter cartridge, a water inlet channel, an evacuation channel, and an evacuation valve. The first cartridge comprises a raw water inlet, a pure water inlet, and a wastewater outlet communicated with the raw water inlet. The water inlet channel is communicated with the raw water inlet, the water inlet channel is provided with a water inlet valve and a booster pump, and the booster pump is arranged between the water inlet valve and the raw water inlet of the first filter cartridge. The water inlet channel is provided with an air inlet valve between the water inlet valve and the booster pump, and the other end of the evacuation channel is communicated with the pure water outlet of the first filter cartridge. The evacuation valve is arranged on the evacuation channel. The filter device can evacuate water left in it and prevent left water from icing due to low temperature and damage to the purifier as the filter device is cracked by freezing can be prevented.

Description

technical field [0001] The invention relates to the technical field of water purifiers, in particular to a filtering device. Background technique [0002] At present, filter devices are widely used as water treatment devices in water purifiers. The filter device can remove bacteria, viruses, heavy metals, salt and other impurities in the water in the water purifier, so as to obtain relatively pure pure water. [0003] However, when the water in the water purifier is finished, there is often some water left in the filter device of the water purifier. When the ambient temperature is too low, especially when the ambient temperature is lower than 0°C, the water remaining in the filter device of the water purifier will freeze due to the temperature being lower than 0°C. In this way, if the water purifier is to make water again, it usually needs to wait for the ice in the filter device to melt before it can be used normally. This will cause the user to wait for a long time for ...

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Problems solved by technology

This will cause users to wait too long for water, causing inconvenience in use

[0004] Moreover, after the retained water in the filter device freezes, the filter device will freeze and crack due to the low temperature of the ice.

Even if the filter device is not cracked by freezing, because the density of ice is lower than that of water, the volume of ice will increase when the water freezes, which will cause the filter device to be swelled and cracked by ice, resulting in damage to the water purifier and irreparable damage. loss

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