Filter for water purifier, water tank assembly and water purifier

Abstract

The utility model discloses a filter for a water purifier, which comprises a filter shell (21) with a second air vent (211) and a filter screen (22) covering the second air vent (211), the surface of one side of the filter screen (22) back to the second air vent (211) is marked as a polluted surface (221), and the filter is characterized by further comprising a cleaning assembly, the cleaning assembly comprises an air conveying pipe (25), an air pump (26) installed at an inlet of the air conveying pipe (25) and a spray head (27) installed at an outlet of the air conveying pipe (25), and the spraying area of the spray head (27) covers the polluted face (221). The utility model further discloses a water tank assembly and a water purifier applying the filter. Compared with the prior art, the filter for the water purifier can realize automatic cleaning of the filter screen.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification equipment technical field, specifically point to a kind of filter, water tank assembly and water purifier for water purifier. BACKGROUND

[0002] Water purifier generally only has the function of purifying water quality, and the water purification speed of water purifier is also slower, so a water storage tank needs to be equipped to store purified pure water, so that water demand can be quickly met when using.

[0003] The existing water storage tank includes a tank body, a water purification inlet and a water purification outlet arranged on the tank body, and an air vent arranged on the top surface of the tank body. An air vent pipe is connected to the air vent, and a filter screen is arranged on the air vent pipe. In this way, when purified water is stored in the water tank, the water purification outlet is closed, and the volume of air in the upper part of the water tank cavity decreases continuously. The air in the water tank is discharged to the outside atmosphere through the filter screen. When purified water is discharged, the water purification outlet is opened. Since the flow rate of the discharged purified water is greater than the flow rate of the purified water entering the water tank, the volume of air in the upper part of the water tank cavity increases continuously, and the outside atmosphere enters the water tank through the filter screen. For details, please refer to the Chinese patent No. CN201520028924.2, "Water purifier water storage tank".

[0004] The filter screen functions to intercept small particles of dust in the air. However, when the filter screen is completely blocked by dust, the air pressure balance in the water tank may be affected, and the filter screen needs to be replaced, which affects the user experience. INVENTION CONTENTS

[0005] The first technical problem to be solved by the utility model is to provide a filter for a water purifier that can automatically clean the filter screen in view of the current status of the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a water tank assembly for a water purifier that applies the above filter.

[0007] The third technical problem to be solved by the utility model is to provide a water purifier that applies the above water tank assembly.

[0008] The technical solution adopted by the utility model to solve the above first technical problem is as follows: a filter for a water purifier, which comprises a filter shell having a second air vent and a filter screen covering the second air vent. The surface of the filter screen on the side opposite to the second air vent is referred to as a contaminated surface. The filter further comprises a cleaning assembly, which comprises a gas delivery pipe, a gas pump installed at the inlet of the gas delivery pipe, and a spray head installed at the outlet of the gas delivery pipe. The spray area of the spray head covers the contaminated surface.

[0009] To enhance the cleaning power of the cleaning components, the cleaning components also include a gas pressurization device installed on the gas supply pipe.

[0010] In order to pressurize the air drawn in by the air pump, the air supply pipe includes a first pipe and a second pipe, the air pump is installed at the inlet of the first pipe, and the nozzle is installed at the outlet of the second pipe.

[0011] The gas booster device includes:

[0012] The housing has an air inlet and an air outlet, which are respectively connected to the outlet of the first pipeline and the inlet of the second pipeline.

[0013] A partition is disposed inside the housing and divides the inner cavity of the housing into an air inlet chamber connected to the air inlet and an air outlet chamber connected to the air outlet. The partition has a connecting hole connecting the air inlet chamber and the air outlet chamber.

[0014] A valve plate, disposed in the air outlet chamber, is used to block the connecting hole; and

[0015] A first elastic element acts between the valve plate and the housing to ensure that the valve plate always tends to block the connecting hole.

[0016] To facilitate the installation of the first elastic element, a fixed seat is installed inside the air outlet chamber. The valve plate can be slidably installed on the fixed seat in a direction perpendicular to the partition. The first elastic element is a compression spring, and the two ends of the compression spring abut against the opposite surfaces of the fixed seat and the valve plate, respectively.

[0017] To protect the filter screen and cleaning components, the filter housing is hollow inside and has an open top, and both the filter screen and cleaning components are installed inside the filter housing.

[0018] To facilitate the collection of dust falling from the contaminated surface, a cylindrical dust collection box with an open top is also included. The dust collection box is installed at the bottom of the filter housing, and the contaminated surface is arranged vertically and faces the open top of the dust collection box.

[0019] To facilitate the removal of the dust collection box for cleaning the dust collected inside, the bottom wall of the filter housing has a downwardly extending connecting cylinder, and the edge of the top of the dust collection box is threaded to the outer periphery of the connecting cylinder.

[0020] To facilitate user observation of the amount of dust collected in the dust collection box, the dust collection box is made of transparent material.

[0021] To automatically perform self-cleaning based on the degree of filter clogging, it also includes...

[0022] A filter monitoring device for monitoring the degree of clogging of the filter; and

[0023] The controller is connected to the air pump and filter monitoring device so that it can receive signals collected by the filter monitoring device and control the start and stop of the air pump.

[0024] In order to monitor the degree of clogging of the filter in real time, the filter is a sponge filter, and a filter cylinder is fitted around the outer periphery of the sponge filter. The filter cylinder is mounted on the filter shell in a way that allows it to move up and down.

[0025] The filter monitoring device includes:

[0026] A pressure sensor is mounted on the filter housing; and

[0027] The second elastic element acts between the filter cylinder and the pressure sensor.

[0028] To facilitate the installation of the second elastic element, the pressure sensor is located directly below the filter cylinder. The second elastic element is a compression spring, which is arranged vertically, with its two ends abutting against the opposite surfaces of the filter cylinder and the pressure sensor, respectively.

[0029] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a water tank assembly for a water purifier, comprising a water tank having a purified water inlet, a purified water outlet and a first vent, characterized in that: the above-mentioned filter is applied, and the second vent is in fluid communication with the first vent.

[0030] The technical solution adopted by this utility model to solve the third technical problem mentioned above is: a water purifier, characterized in that: it uses the above-mentioned water tank assembly.

[0031] Compared with the prior art, the advantages of this utility model are as follows: a cleaning component is formed by an air supply pipe, an air pump installed at the inlet of the air supply pipe, and a nozzle installed at the outlet of the air supply pipe. The spray area of ​​the nozzle covers the contaminated surface of the filter screen. Under the action of the air pump, the nozzle sprays gas toward the filter screen to blow away and clean the dust on the contaminated surface, thereby achieving automatic cleaning of the filter screen. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the water tank assembly in an embodiment of the water purifier of this utility model;

[0033] Figure 2 for Figure 1 A three-dimensional structural diagram of the filter;

[0034] Figure 3 for Figure 2 A longitudinal sectional view.

[0035] Figure 4 for Figure 2 A longitudinal sectional view from another direction;

[0036] Figure 5 for Figure 4 Enlarged view of Part I. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0038] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0039] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

[0040] like Figures 1 to 4 The image shows a preferred embodiment of a water purifier with a water tank assembly according to the present invention. The water tank assembly includes a water tank 1 and a filter 2.

[0041] The water tank 1 has a purified water inlet 11 and a first vent 13 at the top, and a purified water outlet 12 at the bottom. This is the conventional structure of a water purifier tank, and will not be described in detail here.

[0042] The filter 2 includes a filter housing 21, a filter screen 22, a filter screen cylinder 23, a dust collection box 24, an air supply pipe 25, an air pump 26, a nozzle 27, a gas pressurization device 28, and a filter screen monitoring device 29.

[0043] The filter housing 21 is hollow inside and has an open top. Specifically, a second vent 211 is provided on the front side wall of the filter housing 21, and the first vent 13 is connected to the second vent 211 through a vent pipe 131; a connecting cylinder 212 extending downward is provided on the bottom wall of the filter housing 21; and a limiting frame 213 is provided inside the filter housing 21.

[0044] The filter screen 22 is disposed inside the filter housing 21 and covers the rear side of the second vent 211. Specifically, the rear side of the filter screen 22 is referred to as the contaminated surface 221, which is arranged vertically. In this embodiment, the filter screen 22 is a sponge filter.

[0045] The filter cylinder 23 is fitted around the outer periphery of the filter screen 22. The filter cylinder 23 can be installed in the limiting frame 213 for vertical movement. The end face of the front end of the filter cylinder 23 is sealed to the inner wall of the filter shell 21 located around the second vent 211 through the sealing gasket 231, so as to prevent air leakage around the filter screen 22.

[0046] The dust collection box 24 is cylindrical with an open top and is installed at the bottom of the filter housing 21. The contaminated surface 221 is directly opposite the open top of the dust collection box 24, facilitating the collection of dust falling from the contaminated surface 221. In this embodiment, the dust collection box 24 is transparent, allowing the user to easily observe the accumulated dust inside. The edge of the top of the dust collection box 24 is threaded to the outer periphery of the connecting cylinder 212. Thus, when it is necessary to clean the dust collected inside the dust collection box 24, it is only necessary to unscrew the dust collection box 24, making the operation simple.

[0047] The gas supply pipe 25, the air pump 26, the nozzle 27 and the gas pressurization device 28 constitute a cleaning assembly, which is installed inside the filter housing 21.

[0048] The gas pipeline 25 includes a first pipeline 251 and a second pipeline 252.

[0049] Air pump 26 is installed at the inlet of the first pipeline 251.

[0050] The nozzle 27 is installed at the outlet of the second pipeline 252, and the spray area of ​​the nozzle 27 covers the contaminated surface 221.

[0051] The gas booster device 28 includes a housing 281, a partition 282, a valve plate 283, and a first elastic element 284.

[0052] Specifically, the housing 281 has an air inlet 2811 and an air outlet 2812, which are respectively connected to the outlet of the first pipeline 251 and the inlet of the second pipeline 252.

[0053] A partition 282 is disposed inside the housing 281 and divides the inner cavity of the housing 281 into an air inlet chamber 281a connected to an air inlet 2811 and an air outlet chamber 281b connected to an air outlet 2812. The partition 282 has a connecting hole 2821 connecting the air inlet chamber 281a and the air outlet chamber 281b. A fixing seat 2813 is installed in the air outlet chamber 281b.

[0054] The valve plate 283 is located in the air outlet chamber 281b and can be slidably mounted on the fixed base 2813 to block the connecting hole 2821.

[0055] The first elastic element 284 is a compression spring, the two ends of which abut against the opposite surfaces of the fixed seat 2813 and the valve plate 283, so that the valve plate 283 always tends to block the connecting hole 2821.

[0056] A filter monitoring device 29 is disposed inside the filter housing 21 and is used to monitor the degree of clogging of the filter screen 22. In this embodiment, the filter monitoring device 3 includes a pressure sensor 291 and a second elastic element 292. Specifically, the pressure sensor 291 is mounted on the filter housing 21 and located directly below the filter screen cylinder 23; the second elastic element 292 is a compression spring, which is arranged vertically, with its two ends abutting against the opposing surfaces of the filter screen cylinder 23 and the pressure sensor 291, respectively. During operation, the pressure sensor 291 can detect the weight change of the filter screen 22 through the second elastic element 292, and thus can detect the degree of clogging of the filter screen 22.

[0057] In addition, the filter 2 also has a controller that is signal-connected to the air pump 26 and the filter monitoring device 29, so that the controller can receive the signal collected by the filter monitoring device 29 and control the start and stop of the air pump 26.

[0058] The working principle of this embodiment is as follows:

[0059] (1) Water storage and release process:

[0060] When purified water is stored in water tank 1: the purified water outlet 12 is closed, so the volume occupied by the air in the upper part of the inner cavity of water tank 1 is continuously reduced. The air in water tank 1 enters the second vent 211 through the vent pipe 131, is filtered by the filter screen 22 and enters the inner cavity 210, and is finally discharged outward through the third vent 2121.

[0061] When the purified water in the water tank 1 is released: the purified water outlet 12 is opened. Since the flow rate of the purified water released is greater than the flow rate of the purified water entering the water tank 1, the volume occupied by the air in the upper part of the inner cavity of the water tank 1 continuously increases. The outside atmosphere enters the inner cavity 210 through the third vent 2121, is filtered by the filter screen 22, and then enters the vent pipe 131 through the second vent 211 and then enters the water tank 1.

[0062] (2) Self-cleaning process:

[0063] Pressure sensor 291 detects the pressure applied by filter screen 22 in real time. Assuming the initial pressure value is N0, the subsequent real-time pressure value is N1.

[0064] When the weight change value N1-N0 of filter screen 22 is greater than or equal to the preset value B, the controller sends a signal to the air pump 26. After the air pump 26 starts running, it delivers the outside air to the air inlet chamber 281a through the first pipeline 251. The gas is gradually pressurized in the air inlet chamber 281a until it reaches a certain pressure, which will push the valve plate 283 to disengage from the connecting hole 2821. In this way, the high-pressure gas enters the air outlet chamber 281b through the connecting hole 2821 and is supplied to the nozzle 27 through the second pipeline 252. The nozzle 27 sprays high-pressure gas toward the filter screen 22 to blow and clean the dust on the contaminated surface 221.

[0065] When the weight change of filter screen 22 is N1-N0

Claims

1. A filter for a water purifier, comprising a filter shell (21) having a second air vent (211) and a filter screen (22) covering the second air vent (211), the surface of the filter screen (22) on the side away from the second air vent (211) being designated as a pollution surface (221), characterized in that: The cleaning assembly comprises a gas conveying pipe (25), a gas pump (26) installed at the inlet of the gas conveying pipe (25), and a spray head (27) installed at the outlet of the gas conveying pipe (25), wherein the spray area of the spray head (27) covers the contaminated surface (221).

2. The filter of claim 1, wherein: The cleaning assembly further comprises a gas pressurizing device (28) installed on the gas conveying pipe (25).

3. The filter of claim 2, wherein: The gas conveying pipe (25) comprises a first pipe (251) and a second pipe (252), the gas pump (26) is installed at the inlet of the first pipe (251), and the spray head (27) is installed at the outlet of the second pipe (252). The gas pressurizing device (28) comprises a housing (281) having an air inlet (2811) and an air outlet (2812), wherein the air inlet (2811) and the air outlet (2812) are respectively connected to the outlet of the first pipe (251) and the inlet of the second pipe (252); a partition plate (282) arranged in the housing (281) and separating the inner cavity of the housing (281) into an air inlet cavity (281a) connected to the air inlet (2811) and an air outlet cavity (281b) connected to the air outlet (2812), wherein the partition plate (282) has a communication hole (2821) connecting the air inlet cavity (281a) and the air outlet cavity (281b); a valve plate (283) arranged in the air outlet cavity (281b) and used for blocking the communication hole (2821); and a first elastic member (284) acting between the valve plate (283) and the housing (281) to make the valve plate (283) always have a tendency to block the communication hole (2821).

4. The filter of claim 3, wherein: The air outlet cavity (281b) is provided with a fixing seat (2813), the valve plate (283) is slidably installed on the fixing seat (2813) in a direction perpendicular to the partition plate (282), and the first elastic member (284) is a compression spring, both ends of the compression spring abutting against opposite surfaces of the fixing seat (2813) and the valve plate (283).

5. The filter of claim 1, wherein: The filter shell (21) is internally hollow and has an open top, the filter screen (22) and the cleaning assembly are both installed in the filter shell (21).

6. The filter of claim 1, wherein: A dust collecting box (24) in a cylindrical shape and having an open top is further included, the dust collecting box (24) is installed at the bottom of the filter shell (21), and the contaminated surface (221) is arranged in a vertical direction and faces the open top of the dust collecting box (24).

7. The filter of claim 6, wherein: The bottom wall of the filter shell (21) is provided with a connecting cylinder (212) extending downward, and the edge of the open top of the dust collecting box (24) is threadedly connected to the outer periphery of the connecting cylinder (212).

8. The filter of claim 6, wherein: The dust collecting box (24) is a transparent member.

9. The filter of any one of claims 1 to 8, wherein: A filter screen monitoring device (29) is further included for monitoring the clogging degree of the filter screen (22); and A controller is in signal connection with the air pump (26) and the filter screen monitoring device (29) so that the controller can receive the signals collected by the filter screen monitoring device (29) and control the opening and closing of the air pump (26).

10. The filter of claim 9, wherein: The filter screen (22) is a sponge filter screen, and a filter screen cylinder (23) is sleeved on the outer periphery of the sponge filter screen, and the filter screen cylinder (23) is movably installed on the filter shell (21); The filter screen monitoring device (29) comprises a pressure sensor (291) installed on the filter shell (21); and a second elastic member (292) acting between the filter screen cylinder (23) and the pressure sensor (291).

11. The filter of claim 10, wherein: The pressure sensor (291) is located directly below the filter screen cylinder (23), and the second elastic member (292) is a compression spring arranged in the vertical direction, and the two ends of the compression spring abut against the opposite surfaces of the filter screen cylinder (23) and the pressure sensor (291) respectively.

12. A water tank assembly for a water purifier comprising a water tank (1) having a purified water inlet (11), a purified water outlet (12) and a first air vent (13), characterized in that: The filter (2) has the advantages that the second air vent (211) is in fluid communication with the first air vent (13).

13. A water purifier characterized by comprising: The water tank assembly has the advantages that the filter (2) is used.

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