A multi-stage filter pressure relief valve

Abstract

This case relates to a multi-filter pressure relief valve, including a valve body and a pressure relief assembly. The valve body has an inlet channel and an outlet channel that are staggered in the left and right directions, and a pressure relief channel located at one side end of the outlet channel. The pressure relief assembly is detachably connected to the pressure relief channel. It also includes a first filter screen located in the inlet channel and a second filter screen located at the end of the pressure relief assembly within the valve body and extending towards the inlet channel. The first filter screen in the inlet channel and the second filter screen located within the valve body achieve dual filtration, effectively filtering impurities in the inlet water and effectively preventing impurities in the water from entering the core components of the valve.

Description

Technical Field

[0001] This application relates to the field of water heater technology, specifically to the field of a multi-filter pressure relief valve. Background Technology

[0002] When tap water contains a lot of impurities, the water flow sensor in a gas water heater can easily become stuck or blocked, preventing the water heater's control device from receiving the water flow sensor's signal and causing the entire unit to fail to start. Therefore, a filter device needs to be installed at the inlet of the gas water heater to filter impurities from the incoming water.

[0003] Currently, the mainstream water filtration method on the market involves installing a stainless steel filter screen at the inlet of the gas water heater. However, this filter screen is located at the straight pipe connection point, and considering the water inlet resistance it creates, a filter screen with a lower mesh count is used. This means that when there are many impurities, the filtered water may still contain impurities that can affect the water flow sensor's detection. Furthermore, metallic impurities can interfere with the sensing element, causing the gas water heater to fail to start properly or resulting in large detection errors from the water flow sensor, rendering it malfunctioning. Moreover, damage to the water flow sensor increases repair costs.

[0004] Moreover, modern electric water heaters also have water flow sensors installed at the inlet to improve the precise control of the heating process, but they still have the same problems as the gas water heaters mentioned above.

[0005] Therefore, in the field of water heaters, how to effectively filter impurities while ensuring the accuracy and long-term stability of water flow sensors has become a key issue that urgently needs to be addressed. Summary of the Invention

[0006] In response to the problems mentioned above, this application proposes a multi-filter pressure relief valve, which aims to effectively filter impurities in the incoming water by incorporating multiple filtration devices within the pressure relief valve, which can be installed at the inlet of the water heater.

[0007] To achieve the above objectives, the present application adopts the following technical solution:

[0008] A multi-stage filtration pressure relief valve includes a valve body and a pressure relief assembly. The valve body is provided with an inlet channel and an outlet channel that are staggered in the left and right directions, and a pressure relief channel provided on one side of the outlet channel. The pressure relief assembly is detachably connected to the pressure relief channel.

[0009] It also includes a first filter screen disposed in the water inlet channel and a second filter screen disposed at the end of the pressure relief assembly in the valve body and extending toward the water inlet channel.

[0010] Thus, by first setting staggered inlet and outlet channels within the valve body, and configuring a pressure relief channel on one side of the outlet channel, a reasonable water flow path and pressure relief direction are formed within the valve body. Based on this, dual filtration is achieved through a first filter screen in the inlet channel and a second filter screen located within the valve body, effectively filtering impurities from the incoming water and preventing impurities from entering the valve's core components.

[0011] In particular, the second filter screen can be positioned within the water flow path of the valve body formed by the misalignment of the inlet and outlet channels, thus increasing the effective filtration section. Simultaneously, its location at the end of the pressure relief assembly within the valve body allows for easy removal and cleaning along with the pressure relief assembly, improving product maintainability and ease of use.

[0012] In some possible implementations, a first magnetic ring is also included, disposed around the outer periphery of the first filter screen within the water inlet channel.

[0013] In some possible implementations, the second filter screen is a hollow cylindrical structure, and further includes a second magnetic ring fixed to the end of the pressure relief assembly in the valve body and disposed in the inner ring of the second filter screen and extending toward the water inlet channel. The second magnetic ring is a hollow cylindrical structure and has multiple water inlets on its cylindrical wall.

[0014] In some possible implementations, the pressure relief assembly has an annular limiting boss at the end of the valve body, the second magnetic ring is fixed to the inner ring of the limiting boss, and the end of the second filter screen is sleeved around the outer ring of the limiting boss.

[0015] In some possible implementations, the pressure relief assembly has a pressure relief hole in the valve body, the limiting boss has an inner ring wall at the inner ring end, and the pressure relief hole is located in the middle of the inner ring wall.

[0016] In some possible implementations, the valve body has a thick-walled portion formed inside the valve body at the junction of the water inlet channel and the pressure relief channel, and the outer periphery of the second magnetic ring abuts against the lower end of the thick-walled portion.

[0017] In some possible implementations, the second filter screen has a plurality of linear filter holes arranged linearly along the axial direction and uniformly arranged in a ring.

[0018] In some possible implementations, an annular isolation sleeve is provided on the outer periphery of the second filter screen, the isolation sleeve having a guide groove at the linear filter holes.

[0019] In some possible implementations, the outer periphery of the water outlet channel is a quick-connect fitting structure.

[0020] In some possible implementations, the water inlet channel has a threaded connection structure on its outer periphery. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the application of the multi-filter pressure relief valve of this application in a gas water heater;

[0022] Figure 2 This is a cross-sectional view of the multi-filter pressure relief valve of this application;

[0023] Figure 3 This is an exploded view of the first filter screen and the first magnetic ring in this application;

[0024] Figure 4 This is an exploded schematic diagram of the second filter screen and the second magnetic ring in this application;

[0025] Figure 5 yes Figure 2 Enlarged view of a portion of point A in the middle;

[0026] Figure 6 This is a top view of the water outlet channel in this application;

[0027] Figure 7 This is a schematic diagram of one embodiment of the second filter screen in this application. Detailed Implementation

[0028] The following examples further illustrate the features of this application and other related features in detail, so as to facilitate understanding by those skilled in the art:

[0029] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0030] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.

[0031] Please refer to Figure 1In this embodiment, a gas water heater 100 will be used as an example. The lower end of the gas water heater 100 is provided with a water inlet 110, a water outlet 120, and a gas inlet 130. The working principle of the gas water heater 100 will not be described in detail in this embodiment. It should be noted that a water flow sensor 140 is provided inside the water inlet 110 of the gas water heater 100. As mentioned above, when the tap water quality is poor and contains many impurities, it will affect the detection of the water flow sensor 140, thereby causing the gas water heater 100 to malfunction.

[0032] Therefore, the multi-filter pressure relief valve 200 of this application is set at the front end of its inlet 110. For the convenience of maintenance of the multi-filter pressure relief valve 200, preferably, the multi-filter pressure relief valve 200 and the inlet 110 of the gas water heater 100 can be connected by a compression fitting. Quick disassembly and assembly can be completed by simply plugging and unplugging. The connection method is a common technical means in the industry, and will not be described in detail.

[0033] Please refer to Figure 2 This application discloses a multi-filter pressure relief valve, comprising a valve body 1 and a pressure relief assembly 2. The valve body 1 has a water inlet channel 11 and a water outlet channel 12 staggered in the left and right directions, and a pressure relief channel 13 located on one side of the water outlet channel 12. As shown in the figure, the lower end has a water inlet channel 11, which connects to municipal tap water, and the upper end has a water outlet channel 12, which connects to a gas water heater 100. The pressure relief channel 13 is located on the left side of the water outlet channel 12. In some embodiments, a sealing outer ring 121 can be pre-installed on the outer periphery of the water outlet channel 12 to prevent leakage of the quick-connect fitting.

[0034] The pressure relief assembly 2 is detachably connected to the pressure relief channel 13. Specifically, the pressure relief assembly 2 includes a pressure relief ring plug 21 and a sealing gasket 22, a spring 23, and a drain component 24 arranged sequentially from the inside of the valve body 1 towards the end inside the pressure relief ring plug 21. The drain component 24 has a guide hole 241, and the pressure relief ring plug 21 has a pressure relief hole 211 on the outside of the sealing gasket 22, which can be blocked and sealed by the sealing gasket 22. The pressure relief ring plug 21 and the pressure relief channel 13 can be detachably connected by means of threaded connection or other means, and a sealing inner ring 25 is provided on the outer periphery of the pressure relief ring plug 21 to prevent water leakage. In application, due to the increase in ambient temperature, the inlet water pressure in the valve body 1 increases, or water hammer impact occurs due to unstable municipal tap water, the sealing gasket 22 is compressed and can compress the spring 23. At this time, the water in the valve body 1 flows into the pressure relief ring plug 21 through the pressure relief hole 211 and is discharged to the outside through the guide hole 241, achieving the effect of pressure relief.

[0035] Furthermore, please refer to the references. Figure 2 and Figure 3The system also includes a first filter screen 31 disposed within the water inlet channel 11. The first filter screen 31 may be a bowl-shaped structure with mesh-like filter holes. An installation groove 111 is provided within the water inlet channel 11 to accommodate the outer ring of the first filter screen 31. Furthermore, it includes a first magnetic ring 32 disposed on the outer periphery of the first filter screen 31. The first magnetic ring 32 fits into the installation groove 111, and the first filter screen 31 is fitted onto its outer side. To ensure stable installation of the first filter screen 31, a threaded connection structure is preferably provided on the outer periphery of the water inlet channel 11. During maintenance, the quick-connect fitting on the outlet channel 12 side can be disassembled first, and then the threaded connection of the water inlet channel 11 can be disassembled to clean the first filter screen 31. The timing for filter screen cleaning is typically determined by the water usage end, such as a low water flow from a showerhead. Alternatively, the flow rate detected by the water flow sensor 140 can be used to display a filter screen cleaning prompt on the operating interface via a controller, allowing the user to clean the filter screen.

[0036] Further, please refer to Figure 2 and Figure 4 , Figure 5 The system also includes a second filter screen 4 disposed at the end of the pressure relief assembly 2 within the valve body 1 and extending towards the water inlet channel. Specifically, the second filter screen 4 has a hollow cylindrical structure with filter holes on its cylindrical wall. Both the first filter screen 31 and the second filter screen 4 can be made of stainless steel. Furthermore, the system also includes a second magnetic ring 5 fixed to the end of the pressure relief assembly 2 within the valve body 1, disposed within the inner ring of the second filter screen 4, and extending towards the water inlet channel. The second magnetic ring 5 has a hollow cylindrical structure and multiple water inlets 51 on its cylindrical wall.

[0037] Furthermore, the installation method involves providing an annular limiting boss 26 at the end of the pressure relief assembly 2 within the valve body 1. The limiting boss 26 can be integrally formed with the pressure relief ring plug 21. In this case, the second magnetic ring 5 is fixed to the inner ring of the limiting boss 26. The fixing method can be an interference fit or a pin, etc., without specific limitations. Thus, the second magnetic ring 5 can be pulled out when disassembling the pressure relief assembly 2, facilitating maintenance.

[0038] Furthermore, the end of the second filter screen 4 will fit over the outer ring of the limiting boss 26. At the inner ring end of the limiting boss 26, that is, the end facing away from the second magnetic ring 5, an inner ring wall 261 is provided, and a pressure relief hole 211 is located in the middle of the inner ring wall 261. The pressure relief hole 211 is smaller than the inner circumference of the second magnetic ring 5. Thus, the outer ring width of the limiting boss 26 is greater than the inner ring width, which not only stably fixes the second magnetic ring 5 but also provides a more stable cylindrical outer ring for the second filter screen 4.

[0039] Thus, by first setting mutually staggered inlet channels 11 and outlet channels 12 in the valve body 1, and configuring a pressure relief channel 13 on one side of the outlet channel 12, a reasonable water flow path and pressure relief direction are formed within the valve body 1. Based on this, dual filtration is achieved by the first filter screen 31 in the inlet channel 11 and the second filter screen 5 installed in the valve body 1, effectively filtering impurities in the inlet water and effectively preventing impurities in the water from entering the core components of the valve.

[0040] In particular, the second filter screen 5 can access the water flow path within the valve body 1 formed by the misalignment of the inlet channel 111 and the outlet channel 2, thus increasing the effective filtration section. Simultaneously, its location at the end of the pressure relief assembly 2 within the valve body 1 allows for easy removal and cleaning along with the pressure relief assembly 2 from the valve body 1, improving the product's maintainability and ease of use.

[0041] Please refer to the reference. Figure 2 and Figure 5 In some embodiments, the valve body 1 has a thick-walled portion 14 formed within the valve body 1 at the junction of the water inlet channel 11 and the pressure relief channel 13. This thick-walled portion may have a stepped structure, with a downwardly extending lower end face 141 in the direction of the water inlet channel 11 and a leftwardly extending left end face 142 in the direction of the pressure relief channel 13. In this case, the outer periphery of the second magnetic ring 5 abuts against the lower end of the thick-walled portion 14, i.e., the lower end face 141. Thus, during operation, the lower end face 141 abuts against the second magnetic ring 5, preventing it from generating shear force on the limiting boss 26 when subjected to water flow pressure.

[0042] Furthermore, since the thick-walled portion 14 forms a left end face 142 in the direction of the pressure relief channel 13, the second filter screen 4 will be shorter than the second magnetic ring 5 in the extension direction. A stable left and right limiting structure is formed between the left end face 142 and the end face of the pressure relief ring plug 21 on the side of the limiting boss 26.

[0043] Please refer to Figure 6 and Figure 7 As described above, the second filter screen 4 is fitted around the outer periphery of the limiting boss 26, and in some embodiments, it can be selected with a rotatable gap. Of course, a fixed connection can also be used; the rotatable state will be described below. The second filter screen 4 is provided with a plurality of linear filter holes 41 arranged linearly along the axial direction and uniformly arranged in a ring. First, its filter holes are linearly arranged in the axial direction, and a row of linear filter holes 41 is then uniformly arranged in a ring. Thus, the effect of its water outlet channel 12 is as follows... Figure 6 At least two rows of linear filter holes 41 will face the water outlet channel 12 simultaneously. The linear filter holes 41 facing the water outlet channel 12 have a relatively higher probability of clogging. This will create a difference in water flow velocity between the multiple rows of linear filter holes 41, which will drive the second filter screen 4 to rotate, thereby extending the filtration efficiency of the second filter screen 4.

[0044] Please refer to Figure 7 To further improve the filtration efficiency of the second filter screen 4 as described above, a replaceable isolation sleeve 42 is provided on the outer periphery of the second filter screen 4, and a guide groove 421 is provided on the isolation sleeve 42 at the linear filter hole 41. The isolation sleeve 42 can be made of engineering plastic, such as the plastic material used for self-lubricating bushing bearings, to further improve the rotation effect.

[0045] As stated above, this case protects a multi-stage filtration pressure relief valve, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A multiple filter pressure relief valve characterized by, Includes a valve body (1) and a pressure relief assembly (2). The valve body (1) is provided with a water inlet channel (11) and a water outlet channel (12) arranged in a left-right offset manner, and a pressure relief channel (13) provided on one side of the water outlet channel (12). The pressure relief assembly (2) is detachably connected to the pressure relief channel (13). It also includes a first filter screen (31) disposed in the water inlet channel (11) and a second filter screen (4) disposed at the end of the pressure relief assembly (2) in the valve body (1) and extending toward the water inlet channel (11).

2. A multiple filter pressure relief valve as defined in claim 1 wherein, It also includes a first magnetic ring (32) disposed on the outer periphery of the first filter screen (31) in the water inlet channel (11).

3. The multiple filter pressure relief valve of claim 1 wherein, The second filter screen (4) is a hollow cylindrical structure, and also includes a second magnetic ring (5) fixed at the end of the pressure relief assembly (2) inside the valve body (1) and set in the inner ring of the second filter screen (4) and extending towards the water inlet channel (11). The second magnetic ring (5) is a hollow cylindrical structure and has multiple water inlets (51) on its cylindrical wall.

4. A multiple filter pressure relief valve as defined in claim 3 wherein, The pressure relief assembly (2) has an annular limiting boss (26) at the end inside the valve body (1), the second magnetic ring (5) is fixed to the inner ring of the limiting boss (26), and the end of the second filter screen (4) is sleeved around the outer ring of the limiting boss (26).

5. A multiple filter pressure relief valve as defined in claim 4 wherein, The pressure relief assembly (2) has a pressure relief hole (211) inside the valve body (1), and the limiting boss (26) has an inner ring wall (261) at the inner ring end. The pressure relief hole (211) is located in the middle of the inner ring wall (261).

6. A multiple filter pressure relief valve as defined in claim 3 wherein, The valve body (1) has a thick-walled part (14) formed inside the valve body (1) at the junction of the water inlet channel (11) and the pressure relief channel (13), and the outer periphery of the second magnetic ring (5) abuts against the lower end of the thick-walled part (14).

7. A multiple filter pressure relief valve as defined in claim 6 wherein, The second filter screen (4) is provided with a plurality of linear filter holes (41) arranged linearly along the axial direction and uniformly arranged in a ring.

8. A multiple filter pressure relief valve as defined in claim 7 wherein, It also includes an annular isolation sleeve (42) disposed on the outer periphery of the second filter screen (4), wherein the isolation sleeve (42) has a guide groove (421) at the linear filter hole (41).

9. A multi-stage filter pressure relief valve as described in claim 1, characterized in that, The outer periphery of the water outlet channel (12) is a quick-connect structure with a compression fitting.

10. The multiple filter pressure relief valve of claim 1 wherein, The threaded connection structure on the outer periphery of the water inlet channel (11).

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