Filter element for controlling waste water switch through pure water pressure

Abstract

The invention discloses a filter element for controlling waste water switch through pure water pressure, which comprises a barrel-shaped shell, a raw water inlet pipe and a pure water outlet pipe are arranged at the upper end of the shell, a waste water outlet pipe is arranged at the lower part of the shell, a reverse osmosis filter material is arranged in the shell, a pure water channel is arranged in the middle of the reverse osmosis filter material along the length direction in a penetrating manner, and the pure water channel is communicated with the waste water outlet pipe. The upper end of the pure water channel is communicated with the pure water outlet pipe, a switch valve assembly is arranged between the lower end of the pure water channel and the input end of the wastewater outlet pipe, and the switch valve assembly can move according to the hydraulic pressure difference between the pure water channel and the wastewater outlet pipe to close or open the input end of the wastewater outlet pipe. When the faucet connected with the pure water outlet pipe is closed, the pressure of the pure water rises to be consistent with the pressure of the waste water within a short period of time, the waste water continues to flow away to enable the pressure of the waste water to be smaller than the pressure of the pure water, the input end of the waste water outlet pipe is closed through the switch valve assembly, and therefore waste of water resources can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water purification, and in particular to a filter element for controlling a wastewater switch through pure water pressure. Background Art

[0002] At present, the water circuit switch control valves of the existing reverse osmosis filters without solenoid valves are all installed on the head of the filter, which makes it difficult and costly to upgrade the old machines. In addition, they usually control the switch of the water inlet circuit through the pure water circuit. In this way, after the pure water circuit is disconnected, the waste water circuit will still leak for a long time, which will increase the waste of water resources. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a filter element that controls a wastewater switch by pure water pressure, which can reduce the waste of water resources, and the filter element can be used to transform and upgrade an ordinary water purifier into a reverse osmosis filtration water purifier in a low-difficulty and low-cost manner.

[0004] A filter element for controlling a wastewater switch by pure water pressure according to an embodiment of the present invention comprises: a cylindrical shell, a raw water inlet pipe and a pure water outlet pipe are provided at the upper end of the shell, a wastewater outlet pipe is provided at the lower part of the shell, a reverse osmosis filter material is installed inside the shell, the reverse osmosis filter material divides the internal space of the shell into an upper area connected to the raw water inlet pipe and the pure water outlet pipe and a lower area connected to the wastewater outlet pipe, a pure water channel is provided through the middle part of the reverse osmosis filter material along its length, the upper end of the pure water channel is connected to the pure water outlet pipe, a switch valve assembly is provided between the lower end of the pure water channel and the input end of the wastewater outlet pipe, and the switch valve assembly can move according to the hydraulic pressure difference between the pure water channel and the wastewater outlet pipe to close or open the input end of the wastewater outlet pipe.

[0005] The filter element for controlling the wastewater switch by pure water pressure according to the embodiment of the present invention has at least the following beneficial effects:

[0006] When the filter element of the above structure is working normally, the faucet connected to the pure water outlet pipe is opened, the raw water pressure and the waste water pressure are both greater than the pure water pressure, the switch valve assembly opens the input end of the waste water outlet pipe, and the waste water can flow away smoothly; when the faucet connected to the pure water outlet pipe is closed, within a short period of time, the pure water pressure gradually increases to be consistent with the raw water pressure and the waste water pressure. At this time, the waste water continues to flow away, making the waste water pressure lower than the pure water pressure. The switch valve assembly closes the input end of the waste water outlet pipe, thereby reducing the waste of water resources. In addition, the filter element can be used to transform and upgrade an ordinary water purifier into a reverse osmosis filtration pure water machine in a low-difficulty and low-cost manner.

[0007] In some embodiments of the present invention, the lower area is provided with a mounting seat located between the lower end of the pure water channel and the input end of the wastewater outlet pipe, and the switch valve assembly includes a first valve plate, a second valve plate and a valve core clamped between the first valve plate and the second valve plate, the first valve plate is opposite to the lower end of the pure water channel and closes the pure water channel, the second valve plate abuts against the input end of the wastewater outlet pipe, and the valve core can move upward to allow the second valve plate to open the wastewater outlet pipe or move downward to allow the second valve plate to close the wastewater outlet pipe.

[0008] In some embodiments of the present invention, the reverse osmosis filter material is provided with a first plug-in tube protruding from the lower end of the pure water channel, and the mounting seat includes a valve cover mounted on the outside of the first plug-in tube and a valve seat fixed to the shell and connected to the valve cover, and an installation space for accommodating the first valve plate, the second valve plate and the valve core is defined between the valve seat and the valve cover.

[0009] In some embodiments of the present invention, a first channel running through the upper and lower parts is provided in the middle part of the valve cover, the upper end of the first channel is connected to the lower end of the pure water channel, the valve cover is provided with a flaring groove at the lower end of the first channel, the input end of the wastewater outlet pipe is a vertical pipe portion fixed to the valve seat, the valve seat has a support ring arranged around the vertical pipe portion, the outer peripheral wall of the support ring is provided with a plurality of drainage gap grooves connected to the lower area, the second valve plate abuts against the upper end surface of the support ring and seals the vertical pipe portion, a valve sleeve for the valve core to rise and fall and slide is sandwiched between the valve cover and the second valve plate, and the first valve plate is sandwiched between the valve sleeve and the valve cover and seals the end surface of the flaring groove.

[0010] In some embodiments of the present invention, a guide channel is provided in the middle portion of the valve sleeve, the valve core has a guide column adapted to the guide channel, the upper end of the guide column is provided with a limit plate protruding radially thereof, and the second valve plate pushes the limit plate upward to allow a portion of the first valve plate to extend into the expansion groove, thereby opening the port of the vertical pipe portion.

[0011] In some embodiments of the present invention, the valve sleeve is provided with a first sealing ring tightly matched with the first valve plate and a second sealing ring tightly matched with the second valve plate.

[0012] In some embodiments of the present invention, a circle of soft rubber gasket is installed on the upper edge of the support ring, the radial dimension of the soft rubber gasket is larger than the radial dimension of the support ring, and the second valve plate presses downward against the upper surface of the soft rubber gasket.

[0013] In some embodiments of the present invention, the valve cover is connected to the valve seat by a plurality of fastening bolts arranged at intervals in the circumferential direction.

[0014] In some embodiments of the present invention, the housing includes a lower cover and a cylinder detachably connected to the lower cover, and the reverse osmosis filter material is detachably installed on the cylinder.

[0015] In some embodiments of the present invention, the lower cover is connected to the cylinder through a threaded connection, and a waterproof sealing ring is provided between the lower cover and the cylinder.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the appearance of an embodiment of a filter element for controlling a wastewater switch by pure water pressure of the present invention;

[0019] Figure 2 for Figure 1 A schematic cross-sectional view of an embodiment;

[0020] Figure 3 for Figure 2 A local enlarged schematic diagram in FIG.

[0021] Figure 4 It is a structural schematic diagram of an embodiment of a lower cover.

[0022] Reference numerals:

[0023] Shell 100; lower cover 101; cylinder 102; raw water inlet pipe 110; pure water outlet pipe 120; waste water outlet pipe 130; reverse osmosis filter material 200; pure water channel 210; first plug-in tube 220; switch valve assembly 300; first valve plate 310; second valve plate 320; valve core 330; guide column 331; limit plate 332; mounting seat 400; valve cover 410; first channel 411; expansion groove 412; valve seat 420; support ring 421; drainage gap groove 422; valve sleeve 430; guide channel 431; first sealing ring 432; second sealing ring 433; soft rubber gasket 500; fastening bolt 600. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figures 1 to 4 The filter element for controlling a wastewater switch by pure water pressure of the present invention comprises: a cylindrical shell 100, a raw water inlet pipe 110 and a pure water outlet pipe 120 are arranged at the upper end of the shell 100, a wastewater outlet pipe 130 is arranged at the lower part of the shell 100, a reverse osmosis filter material 200 is installed inside the shell 100, and the reverse osmosis filter material 200 divides the internal space of the shell 100 into an upper area connected to the raw water inlet pipe 110 and the pure water outlet pipe 120 and an upper area connected to the wastewater outlet pipe 130. In the lower area connected to the water pipe 130, a pure water channel 210 is provided in the middle of the reverse osmosis filter material 200 along its length direction, the upper end of the pure water channel 210 is connected to the pure water outlet pipe 120, and a switch valve assembly 300 is provided between the lower end of the pure water channel 210 and the input end of the wastewater outlet pipe 130. The switch valve assembly 300 can move according to the hydraulic pressure difference between the pure water channel 210 and the wastewater outlet pipe 130 to close or open the input end of the wastewater outlet pipe 130.

[0029] When the filter element of the above structure is working normally, the faucet connected to the pure water outlet pipe 120 is opened, the raw water pressure and the waste water pressure are consistent, and the waste water pressure is greater than the pure water pressure so that the switch valve assembly 300 opens the input end of the waste water outlet pipe 130, and the waste water can flow away smoothly; when the faucet connected to the pure water outlet pipe 120 is closed, within a short period of time, the pure water pressure gradually increases to be consistent with the raw water pressure and the waste water pressure. At this time, the waste water maintains a movement trend of continuing to flow away, so that the waste water pressure is less than the pure water pressure, and the switch valve assembly 300 can close the input end of the waste water outlet pipe 130, thereby reducing the waste of water resources, and using the filter element, an ordinary water purifier can be transformed and upgraded into a reverse osmosis filtration pure water machine in a low-difficulty and low-cost manner without the need to modify the head part.

[0030] See also Figure 2 and Figure 3 In some embodiments of the present invention, the lower area is provided with a mounting seat 400 located between the lower end of the pure water channel 210 and the input end of the wastewater outlet pipe 130, and the switch valve assembly 300 includes a first valve plate 310, a second valve plate 320 and a valve core 330 sandwiched between the first valve plate 310 and the second valve plate 320, the first valve plate 310 is opposite to the lower end of the pure water channel 210 and closes the pure water channel 210, the second valve plate 320 abuts against the input end of the wastewater outlet pipe 130, and the valve core 330 can move upward to enable the second valve plate 320 to open the wastewater outlet pipe 130 or move downward to enable the second valve plate 320 to close the wastewater outlet pipe 130. It can be understood that when the filter element is working normally, the wastewater pressure is greater than the pure water pressure, and the second valve plate 320 can push the valve core 330 in the direction of the first valve plate 310, thereby opening the input end of the wastewater outlet pipe 130, and the wastewater in the lower area can be discharged outward through the input end of the wastewater outlet pipe 130; when the faucet connected to the pure water outlet pipe 120 is closed, within a short period of time, the pure water pressure gradually increases to be consistent with the wastewater pressure. At this time, the wastewater maintains a movement trend of continuing to flow away, so that the wastewater pressure is less than the pure water pressure, and the first valve plate 310 can push the valve core 330 in the direction of the second valve plate 320, thereby closing the input end of the wastewater outlet pipe 130 to avoid waste of water resources.

[0031] See also Figure 2 and Figure 3In some embodiments of the present invention, in order to facilitate the connection between the reverse osmosis filter material 200 and the switch valve assembly 300, the reverse osmosis filter material 200 is provided with a first plug-in tube 220 protruding from the lower end of the pure water channel 210. In order to facilitate the assembly of the switch valve assembly 300, the mounting seat 400 includes a valve cover 410 sleeved on the outside of the first plug-in tube 220 and a valve seat 420 fixed to the housing 100 and connected to the valve cover 410. An installation space for accommodating the first valve sheet 310, the second valve sheet 320 and the valve core 330 is defined between the valve seat 420 and the valve cover 410.

[0032] See also Figure 3 and Figure 4 In some embodiments of the present invention, a first channel 411 is provided in the middle of the valve cover 410 and runs through from top to bottom. The upper end of the first channel 411 is connected to the lower end of the pure water channel 210. The valve cover 410 is provided with a flaring groove 412 at the lower end of the first channel 411. The input end of the wastewater outlet pipe 130 is a vertical pipe portion fixed to the valve seat 420. The valve seat 420 has a support ring 421 arranged around the vertical pipe portion. The outer peripheral wall of the support ring 421 is provided with a plurality of drainage gap grooves 422 connected to the lower area. The second valve disc 320 abuts against the upper end surface of the support ring 421 and seals the vertical pipe portion. A valve sleeve 430 for the valve core 330 to rise and fall and slide is sandwiched between the valve cover 410 and the second valve disc 320. The first valve disc 310 is sandwiched between the valve sleeve 430 and the valve cover 410 and seals the end surface of the flaring groove 412. Through the above structure, the first valve disc 310, the second valve disc 320, the valve sleeve 430 and the valve core 330 can be positioned and fixed by simply connecting and fixing the valve cover 410 and the valve seat 420. The structure is very simple and does not require a large number of fasteners. When the faucet connected to the pure water outlet pipe 120 is turned on, the raw water enters the upper area from the outer peripheral wall of the reverse osmosis filter material 200 into the reverse osmosis filter material 200, forming pure water entering the pure water channel 210 and waste water entering the lower area. The waste water passes through the drainage gap groove 422 and enters the interior of the support ring 421, thereby lifting the second valve disc 320 upward, and the second valve disc 320 drives the valve core 330 to slide upward along the valve sleeve 430, and the middle part of the first valve disc 310 can be elastically deformed to enter the expansion groove 412. Specifically, the valve seat 420 also has an outer ring wall plate which is concentric with the support ring 421 and is located outside the support ring 421. A plurality of drainage gap grooves 422 are evenly distributed circumferentially around the center line of the vertical pipe portion. The outer ring wall plate is provided with drainage through-hole grooves corresponding to each drainage gap groove 422 one by one. Moreover, wastewater in the lower area passes through the drainage through-hole grooves and the drainage gap grooves 422 in sequence from all directions and then converges into the vertical pipe portion, thereby improving the wastewater discharge efficiency, reducing the turbulence phenomenon of the wastewater, and ensuring the filtering performance of the filter element.

[0033] See also Figure 3 In some embodiments of the present invention, a guide channel 431 is provided in the middle of the valve sleeve 430, the valve core 330 has a guide column 331 adapted to the guide channel 431, and a limit plate 332 protruding in the radial direction is provided at the upper end of the guide column 331, and the second valve disc 320 pushes the limit plate 332 upward to allow a part of the first valve disc 310 to extend into the expansion groove 412, thereby opening the port of the vertical pipe portion, and the expansion groove 412 provides an accommodation space for the elastic deformation of the first valve disc 310. It can be understood that when the faucet connected to the pure water outlet pipe 120 is closed, the pure water pressure gradually increases to the same level as the waste water pressure within a short period of time. At this time, the waste water maintains a movement trend of continuing to flow away, so that the waste water pressure is less than the pure water pressure, and the first valve disc 310 can push the valve core 330 toward the direction of the second valve disc 320, and the limit plate 332 can abut against the upper end of the guide channel 431 to limit the movement stroke of the valve core 330.

[0034] See also Figure 3 In some embodiments of the present invention, in order to improve the sealing effect and avoid liquid leakage that affects the normal operation of the switch valve assembly 300 and causes pure water pollution, the valve sleeve 430 is provided with a first sealing ring 432 that is tightly matched with the first valve plate 310 and a second sealing ring 433 that is tightly matched with the second valve plate 320.

[0035] See also Figure 2 and Figure 3 In some embodiments of the present invention, a circle of soft rubber gasket 500 is installed on the upper edge of the support ring 421, and the radial dimension of the soft rubber gasket 500 is larger than the radial dimension of the support ring 421, and the second valve disc 320 is pressed downward against the upper surface of the soft rubber gasket 500. It should be noted that, since the support ring 421 is provided with a plurality of drainage gap grooves 422 at intervals in the circumferential direction, the second valve disc 320 cannot be fully and stably supported when it is directly pressed against the upper edge of the support ring 421, and the setting of the soft rubber gasket 500 can solve this problem, and the contact area is larger and the supporting effect is better.

[0036] See also Figure 2 In some embodiments of the present invention, in order to facilitate the assembly or replacement of the switch valve assembly 300, the valve cover 410 is connected to the valve seat 420 by a plurality of fastening bolts 600 arranged at intervals in the circumferential direction.

[0037] See also Figure 1 and Figure 2In some embodiments of the present invention, the housing 100 includes a lower cover 101 and a barrel 102 detachably connected to the lower cover 101, and the reverse osmosis filter material 200 is detachably installed on the barrel 102. The reverse osmosis filter material 200 can be replaced after the barrel 102 and the lower cover 101 are disassembled, avoiding the waste of the housing 100 and the switch valve assembly 300 caused by replacing the filter element as a whole. In this embodiment, the lower cover 101 and the barrel 102 are connected by threads, and a waterproof sealing ring is provided between the lower cover 101 and the barrel 102.

[0038] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A filter element for controlling a wastewater switch by pure water pressure, characterized in that: include: A cylindrical shell (100) is provided with a raw water inlet pipe (110) and a pure water outlet pipe (120) at the upper end of the shell (100), a waste water outlet pipe (130) is provided at the lower part of the shell (100), a reverse osmosis filter material (200) is installed inside the shell (100), and the reverse osmosis filter material (200) divides the internal space of the shell (100) into an upper area connected to the raw water inlet pipe (110) and the pure water outlet pipe (120) and a lower area connected to the waste water outlet pipe (130). A pure water channel (210) is provided in the middle of the reverse osmosis filter material (200) along its length direction, the upper end of the pure water channel (210) is connected to the pure water outlet pipe (120), and a switch valve assembly (300) is provided between the lower end of the pure water channel (210) and the input end of the wastewater outlet pipe (130), and the switch valve assembly (300) can move according to the hydraulic pressure difference between the pure water channel (210) and the wastewater outlet pipe (130) to close or open the input end of the wastewater outlet pipe (130).

2. A filter element for controlling a wastewater switch by pure water pressure according to claim 1, characterized in that: The lower area is provided with a mounting seat (400) located between the lower end of the pure water channel (210) and the input end of the wastewater outlet pipe (130); the switch valve assembly (300) comprises a first valve plate (310) and a second valve plate (320) arranged on the mounting seat (400); and a valve core (330) sandwiched between the first valve plate (310) and the second valve plate (320); the first valve plate (310) faces the lower end of the pure water channel (210) and closes the pure water channel (210); the second valve plate (320) abuts against the input end of the wastewater outlet pipe (130); and the valve core (330) can move upward to enable the second valve plate (320) to open the wastewater outlet pipe (130) or move downward to enable the second valve plate (320) to close the wastewater outlet pipe (130).

3. A filter element for controlling a wastewater switch by pure water pressure according to claim 2, characterized in that: The reverse osmosis filter material (200) is provided with a first plug-in tube (220) protruding from the lower end of the pure water channel (210); the mounting seat (400) comprises a valve cover (410) sleeved on the outside of the first plug-in tube (220) and a valve seat (420) fixed to the housing (100) and connected to the valve cover (410); an installation space for accommodating the first valve plate (310), the second valve plate (320) and the valve core (330) is defined between the valve seat (420) and the valve cover (410).

4. A filter element for controlling a wastewater switch by pure water pressure according to claim 3, characterized in that: A first channel (411) is provided in the middle of the valve cover (410) and runs through the valve cover (410) from top to bottom. The upper end of the first channel (411) is connected to the lower end of the pure water channel (210). The valve cover (410) is provided with a flaring groove (412) at the lower end of the first channel (411). The input end of the wastewater outlet pipe (130) is a vertical pipe portion fixedly mounted on the valve seat (420). The valve seat (420) has a support ring (421) arranged around the vertical pipe portion. The support ring (421) ) is provided with a plurality of drainage gap grooves (422) connected with the lower area on its outer peripheral wall, the second valve plate (320) abuts against the upper end surface of the support ring (421) and seals the vertical pipe portion, a valve sleeve (430) for the valve core (330) to rise and fall and slide is sandwiched between the valve cover (410) and the second valve plate (320), the first valve plate (310) is sandwiched between the valve sleeve (430) and the valve cover (410) and seals the end surface of the expansion groove (412).

5. A filter element for controlling a wastewater switch by pure water pressure according to claim 4, characterized in that: A guide channel (431) is provided in the middle of the valve sleeve (430), and the valve core (330) has a guide column (331) adapted to the guide channel (431). A limit plate (332) protruding in its radial direction is provided at the upper end of the guide column (331), and the second valve disc (320) pushes the limit plate (332) upward to allow a portion of the first valve disc (310) to extend into the expansion groove (412), thereby opening the port of the vertical pipe portion.

6. The filter element for controlling a wastewater switch by pure water pressure according to claim 4, characterized in that: The valve sleeve (430) is provided with a first sealing ring (432) tightly matched with the first valve plate (310) and a second sealing ring (433) tightly matched with the second valve plate (320).

7. The filter element for controlling a wastewater switch by pure water pressure according to claim 4, characterized in that: A circle of soft rubber gasket (500) is installed on the upper edge of the support ring (421), the radial dimension of the soft rubber gasket (500) is larger than the radial dimension of the support ring (421), and the second valve plate (320) is pressed downward against the upper surface of the soft rubber gasket (500).

8. The filter element for controlling a wastewater switch by pure water pressure according to claim 3, characterized in that: The valve cover (410) is connected to the valve seat (420) via a plurality of fastening bolts (600) arranged at intervals in the circumferential direction.

9. The filter element for controlling a wastewater switch by pure water pressure according to claim 1, characterized in that: The housing (100) comprises a lower cover (101) and a cylinder (102) detachably connected to the lower cover (101), and the reverse osmosis filter material (200) is detachably mounted on the cylinder (102).

10. A filter element for controlling a wastewater switch by pure water pressure according to claim 9, characterized in that: The lower cover (101) and the cylinder (102) are connected via threads, and a waterproof sealing ring is provided between the lower cover (101) and the cylinder (102).

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