Abstract: A composite filter cartridge, comprising a filter cartridge body provided with two filter devices. Each filter device is respectively provided with a support component which fixes the filter device, and the filter devices are arranged in a linear manner and fixed with respect to one another. Each filter device is respectively provided with an independent housing, a filter module and a filter water channel, the filter module and the filter water channel being arranged within the housing, the filter water channel sequentially comprising a water inlet cavity and a water outlet cavity, the water inlet cavity and the water outlet cavity being connected via the corresponding filter module.

Abstract: An electric valve and a control method therefor are disclosed. The electric valve comprises a mechanical valve body, a motor (1), a valve switch state detection apparatus, a control line (9) and a control circuit (80). The motor and the mechanical valve body are in transmission connection; the control line is electrically connected to the control circuit; the control circuit comprises a drive module (2) and a power supply module (5); and the motor, the valve switch state detection apparatus and the power supply module are respectively connected to the drive module. The control circuit further comprises a backup power supply (90) electrically connected thereto.

Abstract: Disclosed are a filter element and a filter device using the filter element. The filter element includes: a base, wherein the base is installed on the filter device, and a first passage and a second passage are disposed at least partially in the base; and a filter body, wherein the filter body is detachably connected to an upper part of the base, the filter body has a filter space therein, a first filter passage and a second filter passage are connected and arranged on the two ends of the filter space, and a filter material for filtration is provided in the filter space. When the filter element is in a working state, the first filter passage and the first passage are connected for fluid communication, and the second filter passage and the second passage are connected for fluid communication.

Abstract: A water purifier, a method, and a device for controlling the water purifier are provided. The water purifier may include: a filter device including an input end for water to be purified connected with a source of water to be purified, and an output end for purified water connected with a faucet; a water flow detection device for detecting water flow condition in the filter device; a control device electrically connected to the water flow detection device and a power assembly of the filter device. When there exists a requirement on water purification from a user, the control device the control device sends a corresponding state control instruction to the power assembly based on whether the water flow condition satisfies a pre-defined water supply condition. The state control instruction controls whether to switch a working state of the filter device.

Abstract: Disclosed are a filter element and a filter device using the filter element. The filter element includes: a base, wherein the base is installed on the filter device, and a first passage and a second passage are disposed at least partially in the base; and a filter body, wherein the filter body is detachably connected to an upper part of the base, the filter body has a filter space therein, a first filter passage and a second filter passage are connected and arranged on the two ends of the filter space, and a filter material for filtration is provided in the filter space. When the filter element is in a working state, the first filter passage and the first passage are connected for fluid communication, and the second filter passage and the second passage are connected for fluid communication.