Filter core structure with self-venting function

Abstract

The utility model provides a filter core structure with self -bleeding function, including casing, filter core module, water inlet, exhaust port and exhaust passage. The casing inner perimeter and filter core module outer perimeter form water inlet chamber, and water flow enters water inlet chamber and promotes air to extrude from exhaust port, and is discharged outside casing through exhaust passage and waste water port. The filter core module is equipped with end cover, waterproof air permeable membrane or check valve, and the gas discharge path is optimized and liquid backflow is prevented. The utility model discloses the design of hidden exhaust realizes the automation operation, need not manual intervention, improves filter core effective utilization rate and reduces internal pressure drop problem, simplifies the structure and reduces the cost.

Description

Technical Field

[0001] This utility model relates to a filter element structure with self-venting function. Background Technology

[0002] As a core component of water purification equipment, the filter cartridge plays an irreplaceable role in the water purification process. Through physical interception and chemical adsorption, the filter cartridge effectively removes solid particles, kills bacteria, and filters out harmful chemical components in the water, thereby purifying the water. However, in actual use, a large amount of air often remains inside the filter cartridge. These problems not only lead to delayed water output and insufficient filter flow, but may also cause product overflow, seriously affecting the performance of the water purification equipment and the user experience. To solve the problem of residual air inside the filter cartridge, existing technologies mainly adopt two methods: one is to increase the filter pore size to allow internal air to quickly permeate and be discharged through the water outlet; the other is to set an exhaust port on the top of the filter body to discharge the gas manually or by squeezing. However, both methods have significant shortcomings. While increasing the filter pore size can accelerate venting, it will significantly reduce the filtration accuracy of the filter cartridge and affect the purification effect; and the design of the top exhaust port poses a risk of pressure and pressure leakage in filter cartridges that need to withstand high pressure. Once pressure leakage occurs, the filter cartridge will be unable to complete its filtration task normally. In addition, manual venting places additional demands on user operation, increases the complexity of use, and makes it difficult to completely avoid incomplete venting. Summary of the Invention

[0003] This utility model discloses a filter element structure with self-venting function, which aims to solve the above-mentioned problems.

[0004] The present invention adopts the following solution:

[0005] A filter element structure with self-venting function includes a filter element housing, a filter element module disposed inside the housing, and a water inlet at the lower end of the housing; a water inlet cavity is formed between the inner circumference of the housing and the outer circumference of the filter element module, allowing water to flow into the water inlet cavity; an exhaust port is disposed above the filter element module, allowing water flowing into the water inlet cavity to expel air from the exhaust port; an exhaust channel is also disposed inside the filter element module, and an air outlet is disposed on the housing, allowing the expelled air to be discharged outside the housing sequentially through the exhaust port, the exhaust channel, and the air outlet.

[0006] In this embodiment of the present invention, the lower end of the housing is provided with a pure water outlet and a wastewater outlet, the wastewater outlet and the water inlet are arranged outside the pure water outlet, and the wastewater outlet is configured to form the air outlet.

[0007] In this embodiment of the utility model, the filter module is equipped with an end cap that can be placed inside the housing. A space is formed between the end cap and the housing, and the air squeezed by the water flow can be collected in the space. The exhaust port is arranged on the end cap, and the air in the space is squeezed out through the exhaust port.

[0008] In this embodiment of the present invention, a wastewater channel is configured to form the exhaust channel; air squeezed in from the exhaust port can be discharged from the wastewater port to the outside of the housing through the wastewater channel.

[0009] In this embodiment of the present invention, the filter module includes a first filter layer and a second filter layer. The first filter layer is located on the outer periphery of the second filter layer. The pure water end of the second filter layer is connected to the pure water outlet. The wastewater channel is disposed at the first filter layer.

[0010] In this embodiment of the present invention, the filter module further includes an intermediate filter layer, which is located on the inner periphery of the first filter layer and on the outer periphery of the second filter layer.

[0011] In this embodiment of the present invention, the first filter layer is a PP cotton filter layer, the second filter layer is a carbon rod filter layer, and the intermediate filter layer is an RO membrane filter layer.

[0012] In this embodiment of the invention, a waterproof and breathable membrane is provided at the exhaust port, and the air in the water inlet chamber can pass through the waterproof and breathable membrane to enter the exhaust port.

[0013] In this embodiment of the utility model, a one-way valve is provided at the exhaust port. The one-way valve can be in the open state when the air in the water inlet chamber is compressed, and in the closed state when the shell does not discharge water.

[0014] In this embodiment of the utility model, the one-way valve includes a body whose outer periphery can seal with the exhaust port, a channel for fluid to flow is formed within the body, a movable plug is disposed within the body, the movable configuration of the plug is such that the channel can switch between open and closed states, and a spring is disposed between the plug and the body.

[0015] This invention provides a filter element structure with self-venting function, which has the following beneficial effects: it solves the problems of delayed water output, insufficient flow rate, and poor stability under high pressure caused by residual air in traditional filter element structures. Specifically, the filter element structure achieves automated operation through a concealed venting design, eliminating the need for manual intervention by the consumer and improving the user experience. Furthermore, the venting structure is integrated inside the filter element, simplifying the overall design and reducing manufacturing costs. Further, the filter element structure improves the effective utilization rate of the filter element through rapid venting. After water flows into the filter element module, the internal air is quickly expelled, ensuring that the filter layer within the module is completely covered by water, thereby improving the actual utilization rate of the filter material. In particular, timely venting effectively reduces the pressure drop inside the filter element, ensuring the normal normal operation of the filter element under high pressure. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0018] Figure 2 This is a partially enlarged schematic diagram of Embodiment 1 of this utility model.

[0019] Figure 3 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0020] Figure 4 This is a partially enlarged schematic diagram of Embodiment 2 of this utility model.

[0021] Figure 5 This is a schematic diagram of the one-way valve in Embodiment 2 of this utility model. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments.

[0023] Referring to the accompanying drawings, the structure includes a housing 1, a filter module 2 disposed inside the housing 1, and a water inlet 3 located at the lower end of the housing 1. A water inlet cavity 6 is formed between the inner circumference of the housing 1 and the outer circumference of the filter module 2. Water introduced through the water inlet 3 flows into the water inlet cavity 6, pushing the air within the water inlet cavity 6 towards the exhaust port. An exhaust port 7 is located above the filter module 2, and the water flowing into the water inlet cavity 6 forces the air out through the exhaust port 7. An exhaust channel 8 is further disposed inside the filter module 2, and an air outlet 5 is located on the housing 1. The expelled air is discharged to the outside of the housing 1 sequentially through the exhaust port 7, the exhaust channel 8, and the air outlet 5.

[0024] The lower end of the housing 1 is also equipped with a pure water outlet 4 and a wastewater outlet 5. The wastewater outlet 5 and the water inlet 3 are located outside the pure water outlet 4. The wastewater outlet 5 also serves as a vent outlet to discharge waste gas from inside the filter element. Through this design, the wastewater outlet 5 not only performs the function of discharging wastewater but also directly participates in the gas discharge process as part of the exhaust channel. This design effectively simplifies the overall structure of the filter element, avoids the need for additional exhaust devices, thereby reducing manufacturing costs and improving overall reliability.

[0025] The filter module 2 has an end cap 9 on its upper part, which is positioned inside the housing 1 and forms an independent space 15 between the end cap 9 and the housing 1. This space 15 is used to collect air compressed by the water flow, and an exhaust port 7 is located on the end cap 9, through which the air in the space is forced out. The design of the end cap 9 optimizes the air collection path, ensuring that the air can flow efficiently to the exhaust port 7, while also improving the sealing performance of the filter module 2 and preventing gas leakage from unintended paths.

[0026] The filter module 2 is further equipped with a wastewater channel 8, which also serves as an exhaust channel 8. Air forced in from the exhaust port 7 can be discharged from the wastewater port 5 to the outside of the housing 1 through the wastewater channel 8. The shared design of the wastewater channel 8 and the exhaust channel 8 makes full use of the internal space of the filter module 2, avoids the need for additional exhaust pipes, thereby further reducing manufacturing costs and improving overall compactness.

[0027] The filter module 2 consists of multiple filter layers, including a first filter layer 12, a second filter layer 13, and an optional intermediate filter layer 14. The first filter layer 12 is located on the outer periphery of the second filter layer 13 and is typically made of PP cotton material to intercept large particles. The second filter layer 13 is located on the inner periphery of the first filter layer 12 and is typically made of carbon rod material; its pure water end is connected to the pure water outlet 4, and it is used to adsorb organic matter and odors in the water. The intermediate filter layer 14 (optional) is located on the inner periphery of the first filter layer 12 and on the outer periphery of the second filter layer 13, and is typically made of RO membrane material to achieve high-precision filtration. A wastewater channel 8 is configured at the first filter layer 12 to optimize the exhaust path and reduce the impact on the filtration effect. In fact, the wastewater channel (exhaust channel) 8 is formed between the filter media of the first filter layer. The water flow pressure in the inlet chamber forms an isolation layer, ensuring that wastewater and the cavity can only flow towards the wastewater outlet.

[0028] A waterproof and breathable membrane 10 is installed at the exhaust port 7. The waterproof and breathable membrane 10 is fixed to the end cap 9 of the filter module 2 by ultrasonic welding to ensure its firmness and sealing performance. The waterproof and breathable membrane 10 allows air to pass through but prevents water from passing through. Air can pass through the waterproof and breathable membrane 10 and enter the exhaust channel 8, while water flow is blocked. The waterproof and breathable membrane 10 ensures the reliability of the exhaust process while preventing the possibility of water flowing into the exhaust channel 8.

[0029] In another embodiment, a one-way valve 11 may be configured at the exhaust port 7. The one-way valve 11 includes a body 18 whose outer periphery can seal with the exhaust port 7, a channel 19 disposed within the body, and a movable plug 17. The plug 17 switches between the open and closed states of the channel via a spring 16. When the air in the water inlet chamber 6 is compressed by the water flow, the spring 16 is compressed, and the plug 17 moves to open the channel, allowing the air to be discharged. When the housing 1 stops discharging water, the spring 16 returns to its original state, and the plug 17 resets to close the channel, preventing external gas or liquid from flowing back into the filter element. The design of the one-way valve 11 ensures the one-way nature of the exhaust process and avoids backflow.

[0030] The specific operating principle of this utility model is as follows: When the water purification equipment is started, water flows into the inlet chamber 6 through the inlet 3. As the inlet chamber is filled with water, the air in the inlet chamber 6 is pushed and gathers in the space inside the shell. As water continues to flow in, the air pressure gradually increases and eventually enters the exhaust channel 8 through the exhaust port 7. The air then flows along the exhaust channel 8, passes through the wastewater channel 8, and is discharged to the outside of the shell 1 from the wastewater port 5. During this process, the waterproof and breathable membrane 10 ensures that air can pass through smoothly while blocking water from entering the exhaust channel 8; the one-way valve 11 ensures the one-way nature of the exhaust process, preventing external gas or liquid from flowing back into the filter element.

[0031] This invention achieves automatic gas discharge from the filter element through the aforementioned design, solving the problems of insufficient flow rate and poor stability under high pressure caused by residual air in traditional filter elements. The concealed venting design eliminates the need for manual intervention by the consumer, improving the user experience; the venting structure is integrated inside the filter element, simplifying the overall design and reducing manufacturing costs. Simultaneously, rapid venting ensures that the filter layer within filter element module 2 is completely covered by water, improving the actual utilization rate of the filter material and effectively reducing the pressure drop inside the filter element, ensuring its normal operating performance under high pressure.

[0032] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A filter element structure with self-venting function, comprising a filter element housing, wherein a filter element module is disposed within the housing, and a water inlet is disposed at the lower end of the housing; characterized in that, A water inlet cavity is formed between the inner circumference of the housing and the outer circumference of the filter module, and water from the water inlet can flow into the water inlet cavity. The filter module is equipped with an exhaust port at the top, and the water flow entering the water inlet chamber can squeeze the air in the water inlet chamber out of the exhaust port; the filter module is also equipped with an exhaust channel, and the housing is equipped with an air outlet, and the squeezed air can be discharged out of the housing in sequence through the exhaust port, the exhaust channel, and the air outlet.

2. The filter element structure with self-venting function according to claim 1, characterized in that, The lower end of the housing is provided with a pure water outlet and a wastewater outlet, the wastewater outlet and the water inlet are located outside the pure water outlet, and the wastewater outlet is configured to form the air outlet.

3. A filter element structure with self-venting function according to claim 1 or 2, characterized in that, The filter module is equipped with an end cap that can be placed inside the housing. A space is formed between the end cap and the housing, and the air compressed by the water flow can be collected in the space. The exhaust port is located on the end cap, and the air in the space is squeezed out through the exhaust port.

4. A filter element structure with self-venting function according to claim 3, characterized in that, The filter module is configured to form a wastewater channel, and the wastewater channel is configured to form the exhaust channel. Air squeezed in from the exhaust port can be discharged from the wastewater outlet to the outside of the shell through the wastewater channel.

5. A filter element structure with self-venting function according to claim 4, characterized in that, The filter module includes a first filter layer and a second filter layer. The first filter layer is located on the outer periphery of the second filter layer. The pure water end of the second filter layer is connected to the pure water outlet. The wastewater channel is located at the first filter layer.

6. A filter element structure with self-venting function according to claim 5, characterized in that, The filter module also includes an intermediate filter layer, which is located on the inner periphery of the first filter layer and on the outer periphery of the second filter layer.

7. A filter element structure with self-venting function according to claim 6, characterized in that, The first filter layer is a PP cotton filter layer, the second filter layer is a carbon rod filter layer, and the intermediate filter layer is an RO membrane filter layer.

8. A filter element structure with self-venting function according to any one of claims 1, 3-7, characterized in that, A waterproof and breathable membrane is provided at the exhaust port, and air in the water inlet chamber can pass through the waterproof and breathable membrane to enter the exhaust port.

9. A filter element structure with self-venting function according to any one of claims 1, 3-7, characterized in that, A one-way valve is provided at the exhaust port. The one-way valve can be in the open state when the air in the water inlet chamber is compressed, and in the closed state when the shell does not discharge water.

10. A filter element structure with self-venting function according to claim 9, characterized in that, The one-way valve includes a body whose outer periphery can seal with the exhaust port, a channel for fluid flow is formed within the body, a movable plug is disposed within the body, the movable plug is configured to switch the channel between open and closed states, and a spring is disposed between the plug and the body.

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