Filter assembly of water purifier and water purifier

Abstract

The utility model provides a filter assembly of a water purifier and the water purifier. The filter assembly comprises a filter screen, a filter pipeline, a pressurizing ring, a backflushing water inlet and a backflushing water outlet, the backflushing water inlet and the backflushing water outlet are formed in the wall surface of the filtering pipeline; the backflushing water inlet is communicated with the water purifier water inlet; the backwash water outlet is communicated with a wastewater port of the water purifier; the filter screen and the pressurizing ring are sequentially arranged in the filter pipeline between the backflushing water outlet and the backflushing water inlet; wherein the maximum outer diameter of the pressurizing ring is smaller than or equal to the inner diameter of the filtering pipeline. The pressurizing ring is arranged in the filter pipeline, so that the water flow pressure when water flows through the filter screen in the backwashing process can be increased, and the washing effect of the water purifier on impurities adsorbed on the filter screen is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of household appliances, in particular to a filter assembly of water purifier and water purifier. BACKGROUND

[0002] The water purifier usually sets a filter screen at the water outlet end of the filter core to block the impurities leaked from the filter core, however, the filter screen will be blocked after long time use. In order to solve the problem of filter screen blockage, the water purifier will reverse flush the filter screen. However, the flushing effect of the water purifier on the impurities adsorbed on the filter screen is not good, therefore, how to improve the flushing effect of the water purifier on the impurities adsorbed on the filter screen becomes a problem to be solved. SUMMARY

[0003] The utility model wants to solve the technical problem that the flushing effect of the water purifier on the impurities adsorbed on the filter screen is not good, and provides a filter assembly of water purifier and water purifier.

[0004] The utility model solves the above technical problem through the following technical scheme:

[0005] In the first aspect, a filter assembly of water purifier is provided, which comprises a filter screen, a filter pipeline, a pressurizing ring, a backflush inlet and a backflush outlet.

[0006] The backflush inlet and the backflush outlet are arranged on the wall surface of the filter pipeline.

[0007] The backflush inlet is communicated with the water inlet of the water purifier.

[0008] The backflush outlet is communicated with the waste water outlet of the water purifier.

[0009] The filter screen and the pressurizing ring are arranged in the filter pipeline between the backflush outlet and the backflush inlet in sequence, and the maximum outer diameter of the pressurizing ring is less than or equal to the inner diameter of the filter pipeline.

[0010] Optionally, the filter assembly further comprises a limiting element.

[0011] The limiting element is arranged between the pressurizing ring and the backflush inlet, and the limiting element is used for limiting the movement range of the pressurizing ring.

[0012] Optionally, the limiting element comprises a plurality of convex structures arranged on the inner wall of the filter pipeline in a circumferential interval.

[0013] Optionally, the backflush inlet and the backflush outlet are arranged on the opposite wall surfaces of the filter pipeline.

[0014] Optionally, the backflush inlet is arranged on the lower wall surface of the filter pipeline.

[0015] The backflush outlet is arranged on the upper wall of the filter pipeline.

[0016] Optionally, the inner diameter of the pressurizing ring near the backflush outlet side is less than or equal to the inner diameter of the pressurizing ring near the backflush inlet side.

[0017] Optionally, the filter assembly is applied to a water purifier, and the water purifier comprises a filter element; the filter assembly further comprises a purified water inlet and a purified water outlet.

[0018] The purified water inlet and the purified water outlet are arranged at two ends of the filter pipeline.

[0019] The purified water inlet is communicated with the water inlet of the water purifier through the filter element.

[0020] The purified water outlet is communicated with the water outlet of the water purifier.

[0021] In the second aspect, a water purifier is provided, and the water purifier comprises the filter assembly according to any one of the above.

[0022] Optionally, the water purifier comprises a filter element, a water inlet of the water purifier and a water outlet of the water purifier; the filter assembly further comprises a purified water inlet and a purified water outlet.

[0023] The purified water inlet and the purified water outlet are arranged at two ends of the filter pipeline.

[0024] The purified water inlet is communicated with the water inlet of the water purifier through the filter element.

[0025] The purified water outlet is communicated with the water outlet of the water purifier.

[0026] Optionally, the water purifier further comprises a flow meter.

[0027] The purified water outlet is communicated with the water outlet of the water purifier through the flow meter.

[0028] The positive progress effect of the utility model lies in that the pressurizing ring arranged in the filter pipeline can increase the water flow pressure when water flows through the filter screen during backflushing, and thus the effect of flushing the impurities adsorbed on the filter screen by the water purifier is better. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A module schematic view of the filter assembly of the water purifier according to the utility model embodiment 1 is provided.

[0030] Figure 2 A structure schematic view of the filter assembly of the water purifier according to the utility model embodiment 1 is provided.

[0031] Figure 3 A structure schematic diagram of a water purifier provided by the utility model embodiment 2.

[0032] Figure 4 A working flow chart of a water purifier provided by the utility model embodiment 2. DETAILED DESCRIPTION

[0033] The utility model will be described in detail below with a preferred embodiment and in combination with the drawings.

[0034] Embodiment 1

[0035] In order to make the water purifier flush the impurities adsorbed on the filter screen 11 better, the utility model embodiment 1 provides a filter assembly of a water purifier. Figure 1 A module schematic diagram of a filter assembly of a water purifier provided by the utility model embodiment 1. The filter assembly of the water purifier comprises a filter screen 11, a filter pipeline 12, a pressurizing ring 13, a backflushing water inlet 14 and a backflushing water outlet 15.

[0036] The backflushing water inlet 14 and the backflushing water outlet 15 are arranged on the wall surface of the filter pipeline 12; the backflushing water inlet 14 is communicated with the water inlet of the water purifier; the backflushing water outlet 15 is communicated with the waste water outlet of the water purifier; the filter screen 11 and the pressurizing ring 13 are arranged in the filter pipeline 12 between the backflushing water outlet 15 and the backflushing water inlet 14 in sequence; wherein the maximum outer diameter of the pressurizing ring 13 is less than or equal to the inner diameter of the filter pipeline 12.

[0037] When the filter screen is cleaned, the water flow entering from the backflushing water inlet 14 will flush the pressurizing ring 13 to the filter screen 11 side, because the inner diameter of the pressurizing ring 13 is less than the inner diameter of the filter pipeline 12, therefore the water flow passing through the pressurizing ring 13 makes the water flow pressure passing through the filter screen 11 larger, and then can clean the impurities adsorbed on the filter screen 11 more effectively. The water flow carrying the impurities after backflushing flows from the backflushing water outlet 15 to the waste water outlet of the water purifier. It needs to be explained that in order to avoid the water purifying water of the water purifier being polluted by the impurities in the water flow after backflushing, the backflushing process of the filter screen will be carried out when the user does not use the water purifier.

[0038] Further, the outer surface of the pressurizing ring 13 and the inner surface of the filter pipe 12 are smooth, so that the friction force that the pressurizing ring 13 suffers during movement is reduced, and the friction force that the water flow needs to overcome to push the pressurizing ring 13 to the end of the filter screen 11 is reduced. The water flow pressure can act on the filter screen 11 as much as possible, so that the filter screen 11 is washed more cleanly. The backflush inlet 14 can be connected to the water inlet of the water purifier through a first electromagnetic valve and / or a first check valve, to control the opening and closing of the backflush water flow and / or prevent the backflush water flow from flowing back. The backflush outlet 15 can be connected to the waste water outlet of the water purifier through a second electromagnetic valve and / or a second check valve, to control the opening and closing of the backflush water flow and / or prevent the water flow carrying impurities from flowing back.

[0039] In the embodiment, the pressurizing ring arranged in the filter pipe can increase the water flow pressure when the water flow passes through the filter screen during the washing process, so that the water purifier can wash the impurities adsorbed on the filter screen better.

[0040] In an embodiment, the filter assembly further comprises a limiting element; the limiting element is arranged between the pressurizing ring 13 and the backflush inlet 14; the limiting element is used to limit the movement range of the pressurizing ring 13.

[0041] In the embodiment, the movement range of the pressurizing ring 13 is limited by using the limiting element, so that the pressurizing ring 13 can only move between the end of the filter screen 11 and the limiting element, and the pressurizing ring 13 is prevented from moving excessively in the filter pipe 12 (for example, moving to the right of the backflush inlet 14 in the middle of the filter pipe 12). Figure 1 In addition, the limiting element can make the pressurizing ring 13 work at the optimal position, so as to improve the stability and reliability of the entire filter assembly.

[0042] In an embodiment, the limiting element comprises a plurality of protruding structures arranged circumferentially and spaced apart around the inner wall of the filter pipe 12. For example, the structure of the limiting element can be the limiting groove shown in FIG. 8. Figure 2

[0043] In the embodiment, the plurality of protruding structures arranged circumferentially and spaced apart around the inner wall of the filter pipe 12 can uniformly limit the movement of the pressurizing ring, so that the pressurizing ring 13 is uniformly stressed when it hits the limiting element, and the service life of the limiting element can be improved.

[0044] In an embodiment, the backflush inlet 14 and the backflush outlet 15 are arranged on opposite walls of the filter pipe 12.

[0045] In the embodiment, the backflush inlet and the backflush outlet are arranged on opposite walls of the filter pipe 12, so as to reduce unnecessary turns and backflow of the water flow in the filter pipe 12, and thus reduce the water flow resistance.

[0046] ​In one embodiment, the backflush inlet 14 is arranged on the lower wall of the filter pipeline 12, and the backflush outlet 15 is arranged on the upper wall of the filter pipeline 12.

[0047] In the embodiment, the backflush inlet 14 is arranged on the lower wall of the filter pipeline 12, and the backflush outlet 15 is arranged on the upper wall of the filter pipeline 12, which can ensure that the water flows "in from the bottom and out from the top", so that the impurities adhered to the filter screen are more easily driven by the water flow due to the effect of gravity, and then can be more effectively flushed from the filter screen. In addition, if the water flows from top to bottom, the impurities flushed away can accumulate at the bottom of the filter screen, increasing the risk of clogging the bottom of the filter screen. The "in from the bottom and out from the top" mode can avoid such impurity accumulation, so that the filter screen remains unblocked.

[0048] In one embodiment, the inner diameter of the pressurizing ring 13 near the backflush outlet 15 is less than or equal to the inner diameter of the pressurizing ring 13 near the backflush inlet 14. Preferably, the inner diameter of the pressurizing ring 13 near the backflush outlet 15 is less than the inner diameter of the pressurizing ring 13 near the backflush inlet 14.

[0049] In the embodiment, the inner diameter of the pressurizing ring 13 near the backflush outlet 15 is designed to be less than or equal to the inner diameter of the pressurizing ring 13 near the backflush inlet 14, which can increase the water flow pressure to some extent when the water flows through the filter screen, and then the effect of flushing the impurities adhered to the filter screen by the water purifier is better.

[0050] In one embodiment, the filter assembly is applied to a water purifier, and the water purifier includes a filter core; the filter assembly further includes a purified water inlet and a purified water outlet.

[0051] The purified water inlet and the purified water outlet are arranged at two ends of the filter pipeline 12; the purified water inlet is in communication with the water inlet of the water purifier through the filter core; and the purified water outlet is in communication with the water outlet of the water purifier. Further, a third electromagnetic valve can be arranged between the filter core and the purified water inlet to control the on-off of the purified water flow in the water purifier.

[0052] In the embodiment, the purified water inlet and the purified water outlet arranged in the filter assembly can ensure that the purified water path and the backflushing water path are two different water paths, and then the impurities in the backflushing water path can be prevented from polluting the purified water path, so that the user experience is not poor.

[0053] Embodiment 2

[0054] In order to make the effect of flushing the impurities adhered to the filter screen by the water purifier better, the utility model embodiment 2 provides a water purifier, and any filter assembly in the above-mentioned embodiment 1 is arranged on the water purifier.

[0055] In one embodiment, the water purifier includes a filter core; the filter assembly further includes a purified water inlet and a purified water outlet.

[0056] The purified water inlet and outlet are located at both ends of the filter pipeline; the purified water inlet is connected to the water purifier inlet through the filter element; the purified water outlet is connected to the water purifier outlet. Furthermore, a third solenoid valve can be installed between the filter element and the purified water inlet to control the flow of purified water in the water purifier.

[0057] In this embodiment, setting a purified water inlet and a purified water outlet in the filter component ensures that the purified water path and the backwash water path are two different paths, thereby avoiding impurities in the backwash water path from contaminating the purified water path and causing a poor user experience.

[0058] In one embodiment, the water purifier further includes a flow meter; the purified water outlet is connected to the water purifier outlet via the flow meter.

[0059] In this embodiment, the water purifier can adjust the backwashing frequency according to the outflow rate measured by the flow meter, so that the backwashing frequency of the water purifier is dynamically set, thereby improving the rinsing effect of the filter element.

[0060] In one embodiment, Figure 3 This is a structural schematic diagram of a water purifier provided in Embodiment 2 of this utility model, combined with... Figure 3 Explain the working principle of a water purifier.

[0061] When the water purifier needs to backwash the filter, the controller ( Figure 3 (Not shown) The first solenoid valve 317 and the second solenoid valve 314 are opened and the third solenoid valve 315 is closed, so that the water entering from the inlet 311 passes through the filter element 312, the first one-way valve 316, the first solenoid valve 317, the backwash inlet of the filter assembly 318, the pressure ring in the filter assembly 318, and the filter screen in the filter assembly 318 in order to rinse the filter screen. Then, the water containing impurities is sent to the wastewater outlet 313 of the water purifier through the backwash outlet of the filter assembly 318, the second one-way valve 323, and the second solenoid valve 314 in sequence.

[0062] When the water purifier needs to dispense purified water, the controller ( Figure 3The controller controls the first electromagnetic valve 317 and the second electromagnetic valve 314 to be closed and controls the third electromagnetic valve 315 and the water valve assembly 319 to be opened, so that the water flow entering from the water inlet 311 is filtered into a pure water flow by the filter element 312, the third electromagnetic valve 315, the pure water inlet of the filter assembly 318, the pressurizing ring in the filter assembly 318 and the filter screen in the filter assembly 318 in sequence, and then the pure water flow is sent to the pure water outlet 322 through the pure water outlet 322 of the filter assembly 318, the water valve assembly 319, the flow meter 320 and the direct current pump 321 in sequence. It should be noted that the water valve assembly 319 is used to stabilize the water pressure of the pure water flow, and the controller controls the opening and closing of the water valve in the water valve assembly 319 to control the on-off of the pure water flow; the flow meter 320 is used to count the water production of the water flow; and the direct current pump 321 is used to provide water pressure to ensure water outlet.

[0063] In one embodiment, Figure 4 A working flow chart of a water purifier is provided for the embodiment 2 of the utility model, which illustrates how the water purifier produces water and how the backwashing frequency is dynamically adjusted. Figure 4 A working flow chart of a water purifier is provided for the embodiment 2 of the utility model, which illustrates how the water purifier produces water and how the backwashing frequency is dynamically adjusted.

[0064] S1: Determine whether the water purifier needs to produce water. If yes, proceed to S2. If no, proceed to S3.

[0065] S2: Open the electromagnetic valve 3 (the third electromagnetic valve in the above embodiment) and close the electromagnetic valves 1 and 2 (the first electromagnetic valve and the second electromagnetic valve in the above embodiment), and end after producing pure water.

[0066] S3: Determine whether the pure water outlet flow is greater than or equal to a first preset threshold value. If yes, proceed to S4. If no, end.

[0067] The use time length of the water purifier can also be determined to be greater than or equal to a second preset threshold value, wherein the first preset threshold value and the second preset threshold value can be set according to actual conditions.

[0068] S4: Adjust the backwashing frequency.

[0069] It should be noted that the pure water flow difference is adjusted by adjusting the difference coefficient, so that the pure water flow difference falls within the preset interval, and then the initial backwashing frequency is adjusted to obtain the target backwashing frequency.

[0070] The difference coefficient can be set according to specific needs, and preferably, it can be set according to water quality in different regions. Different water quality in different regions is based on different TDS detection values (TDS detection value is an index for measuring the total solid content dissolved in water) as the basis. Different water quality hardness and initial washing frequency are generally positively correlated, and the specific water quality hardness and initial washing frequency calculation formula can be obtained by experimental test.

[0071] Specifically, the difference coefficient is a coefficient of a PID controller.

[0072] According to the formula: U(t) = K p *e(t) + K i *∑e(t) + K d *(e(t) - e(t-1)) adjusts the PID coefficient, wherein U(t) is the flow difference of the water purifier, K p , K i , K d is a coefficient of a PID controller, that is, a difference coefficient.e(t) is the first difference; e(t-1) is the second difference.

[0073] S5: open the electromagnetic valves 1 and 2 (the first electromagnetic valve and the second electromagnetic valve in the above embodiment) and close the electromagnetic valve 3 (the third electromagnetic valve in the above embodiment), reverse the water flow to flush the filter screen, and then end.

[0074] S6: determine whether the flow difference falls into a preset interval, if yes, proceed to S7, and if not, proceed to S8.

[0075] S7: adjust the backwashing frequency.

[0076] It should be noted that the backwashing frequency is adjusted according to the use of the water purifier.

[0077] S8: open the electromagnetic valves 1 and 2 (the first electromagnetic valve and the second electromagnetic valve in the above embodiment) and close the electromagnetic valve 3 (the third electromagnetic valve in the above embodiment), reverse the water flow to flush the filter screen, and then end.

[0078] In addition, when the filter element is flushed for the first time, the filter screen will be backwashed to prevent impurities from the first flushing of the filter element structure from blocking the filter screen.

[0079] It should be noted that the utility model does not involve the improvement of the controller control method, and the specific implementation mode can be referred to the related technical description.

[0080] Although the specific embodiments of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the utility model, and these changes and modifications all fall within the protection scope of the utility model.

Claims

1. A filter assembly for a water purifier, characterized in that, The filter assembly comprises a filter screen, a filter pipeline, a pressurizing ring, a backflush inlet and a backflush outlet. The backflush inlet and the backflush outlet are arranged on the wall surface of the filter pipeline. The backflush inlet is in communication with the water inlet of the water purifier. The backflush outlet is in communication with the waste water outlet of the water purifier. The filter screen and the pressurizing ring are arranged in the filter pipeline between the backflush outlet and the backflush inlet in sequence; wherein the maximum outer diameter of the pressurizing ring is less than or equal to the inner diameter of the filter pipeline.

2. The filter assembly of claim 1, wherein, The filter assembly further comprises a limiting element. The limiting element is arranged between the pressurizing ring and the backflush inlet; the limiting element is used for limiting the moving range of the pressurizing ring.

3. The filter assembly of claim 2, wherein, The limiting element comprises a plurality of convex structures which are arranged in a circumferential direction and are spaced apart from each other around the inner wall of the filter pipeline.

4. The filter assembly of claim 1, wherein, The backflush inlet and the backflush outlet are arranged on the opposite wall surfaces of the filter pipeline.

5. The filter assembly of claim 4, wherein, The backflush inlet is arranged on the lower wall surface of the filter pipeline. The backflush outlet is arranged on the upper wall surface of the filter pipeline.

6. The filter assembly of claim 1, wherein, The inner diameter of the pressurizing ring near the side of the backflush outlet is less than or equal to the inner diameter of the pressurizing ring near the side of the backflush inlet.

7. The filter assembly of claim 1, wherein, The filter assembly is applied to a water purifier, and the water purifier comprises a filter core; the filter assembly further comprises a purified water inlet and a purified water outlet. The purified water inlet and the purified water outlet are arranged at two ends of the filter pipeline. The purified water inlet is in communication with the water inlet of the water purifier through the filter core. The purified water outlet is in communication with the water outlet of the water purifier.

8. A water purifier characterized by comprising: The water purifier comprises the filter assembly according to any one of claims 1-7.

9. The water purifier of claim 8, wherein, The water purifier comprises a filter core, a water inlet of the water purifier and a water outlet of the water purifier; the filter assembly further comprises a purified water inlet and a purified water outlet. The purified water inlet and the purified water outlet are arranged at two ends of the filter pipeline. The purified water inlet is in communication with the water inlet of the water purifier through the filter core. The purified water outlet is in communication with the water outlet of the water purifier.

10. The water purifier of claim 9, wherein The water purifier further comprises a flow meter. The purified water outlet is in communication with the water outlet of the water purifier through the flow meter.

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