Filtering device of wall-hanging stove
By adopting a three-way valve and a removable cleaning plug design in the wall-hung boiler, the problem of cumbersome disassembly and assembly of the filter screen in traditional wall-hung boilers is solved, enabling convenient cleaning and maintenance of the filter screen and reducing the difficulty of equipment maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional wall-hung boiler filters require regular cleaning and maintenance, but disassembly and assembly are troublesome, making equipment maintenance difficult.
The water circuit is constructed using a three-way valve, and the filter screen is cleaned and maintained using a removable cleaning plug. This avoids disassembling the three-way valve from the cold water interface to the external water pipe. The operation process is simplified by rotating the plug head and the limiting protrusion design.
It reduces the difficulty of equipment maintenance, simplifies the cleaning and maintenance process of the filter, and improves the convenience and efficiency of operation.
Smart Images
Figure CN224009197U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wall-hung boiler technology, and in particular to a filtration device for a wall-hung boiler. Background Technology
[0002] A wall-hung boiler is a gas-fired water heater used to provide hot water for bathrooms and heating, and is commonly found in northern regions. Because water quality varies in different areas, the water entering the boiler needs to be filtered to prevent impurities such as gravel and iron filings from entering the boiler's water system, thus providing protection.
[0003] For wall-hung boilers, the traditional method for filtering incoming water is to connect a filter between the cold water inlet and the external water pipe. This filter contains a screen (e.g., a disc filter or a pocket filter). Because impurities trapped in the screen become trapped, it easily becomes clogged over time, requiring regular cleaning and maintenance. Traditionally, cleaning the filter requires removing the entire filter from the cold water inlet, pulling the screen out from the inlet, cleaning, reinstalling, and sealing. Therefore, this traditional design is cumbersome and makes equipment maintenance difficult. Utility Model Content
[0004] Based on this, the present invention provides a filtration device for a wall-hung boiler, which constructs a water circuit using a three-way valve and then uses a removable cleaning plug to achieve the filtration function. The filter screen can be cleaned and maintained without having to remove the three-way valve from the cold water interface of the wall-hung boiler and the external water pipe, thereby reducing the difficulty of equipment maintenance.
[0005] A filtration device for a wall-hung boiler, comprising:
[0006] A three-way valve; the three-way valve has a cold water inlet, a cold water outlet, and a cleaning port; the cleaning port is located between the cold water inlet and the cold water outlet; the inlet end of the cleaning port has a limiting groove and a notch connecting to the limiting groove; and
[0007] A cleaning plug detachably mounted on a three-way valve; the cleaning plug includes: a plug head passing through the inlet end of a cleaning port, a spring sleeved on the plug head, a central screw connected to one end of the plug head, a base connected to the other end of the central screw, and a first filter screen surrounding the outer periphery of the central screw; one end of the plug head is provided with a limiting protrusion, which enters a limiting groove from a notch; the other end of the plug head is provided with a first retaining groove; one end of the spring abuts against the plug head, and the other end of the spring abuts against the inner wall of the cleaning port; one end of the central screw is provided with a first thread connecting to the plug head, and the other end of the central screw is provided with a second thread connecting to the base; the base is provided with guide holes evenly spaced circumferentially; the base is also provided with a second retaining groove; one end of the first filter screen is inserted into the first retaining groove, and the other end of the first filter screen is inserted into the second retaining groove.
[0008] In the aforementioned wall-hung boiler's filtration device, the cleaning plug is installed into the three-way valve via a pin. When the first filter screen needs to be removed for cleaning and maintenance, the plug head is rotated so that the limiting protrusion slides into the notch. At this point, under the action of water pressure and a spring, the cleaning plug pops out from the cold water inlet. After removing the cleaning plug, the base is unscrewed from the central screw, and then the first filter screen can be removed for maintenance. After the first filter screen has been maintained, the cleaning plug is reassembled and inserted into the cold water inlet. Then, the plug head is rotated so that the limiting protrusion and the notch are misaligned. Through this design, a water circuit is constructed using a three-way valve, and the filtration function is achieved using a removable cleaning plug. This allows for filter screen cleaning and maintenance without removing the three-way valve from the wall-hung boiler's cold water interface and external water pipes, thus reducing the difficulty of equipment maintenance.
[0009] In one embodiment, a straight-line mark is formed on the outer end face of the plug, and the straight-line mark is aligned with the limiting protrusion. When the limiting protrusion enters the limiting groove, the operator can know the position of the limiting protrusion through the straight-line mark, reducing the difficulty of operation.
[0010] In one embodiment, the outer end face of the cold water inlet is further provided with a triangular mark, which is offset from the notch in the circumferential direction. The triangular mark can be used to mark a preset dwell position, facilitating operation by the operator.
[0011] In one embodiment, the cleaning plug further includes a sealing ring fitted onto the plug head; the sealing ring is located between the spring and the first filter screen. The sealing ring can improve the seal between the plug head and the cold water inlet.
[0012] In one embodiment, the cleaning plug further includes a second filter screen fitted around the outer periphery of the first filter screen; the second filter screen is sandwiched between the plug head and the base. This dual-filter design improves filtration efficiency.
[0013] In one embodiment, the pore size of the second filter screen is smaller than that of the first filter screen. The incoming cold water first passes through the large-pore first filter screen to intercept larger diameter impurities, and then passes through the small-pore second filter screen to intercept smaller diameter impurities.
[0014] In one embodiment, radially extending fins are provided on the outer periphery of the central screw. The fins provide a stable and reliable gripping area for the operator to rotate the central screw.
[0015] In one embodiment, the three-way valve has a transparent valve body. The transparent three-way valve allows operators to visually observe the condition of the first filter screen. Attached Figure Description
[0016] Figure 1 This is a perspective view of the filtration device of a wall-hung boiler according to an embodiment of the present invention;
[0017] Figure 2 for Figure 1 A perspective view of the filter device of the wall-hung boiler shown from another angle;
[0018] Figure 3 for Figure 1 A half-sectional view of the filter device of the wall-hung boiler shown;
[0019] Figure 4 for Figure 1 A schematic diagram showing the removal of the cleaning plug for the filter device of the wall-hung boiler;
[0020] Figure 5 for Figure 4 A perspective view of the three-way valve in the filter device of the wall-hung boiler shown.
[0021] Figure 6 for Figure 5 A half-sectional view of the three-way valve shown;
[0022] Figure 7 for Figure 4 A perspective view of the cleaning plug in the filter device of the wall-hung boiler shown;
[0023] Figure 8 for Figure 7 A three-dimensional view of the cleaning plug from another perspective;
[0024] Figure 9 for Figure 7 A half-sectional view of the cleaning plug shown;
[0025] Figure 10 for Figure 9 An exploded view of the cleaning plug shown;
[0026] Figure 11 for Figure 10 A perspective view of the support shaft in the cleaning plug shown;
[0027] Figure 12 for Figure 10 A perspective view of the chassis in the cleaning hydrant shown.
[0028] The meanings of the labels in the attached diagram are as follows:
[0029] 100 - Filter device for wall-hung boiler;
[0030] 10-Three-way valve, 11-Cold water inlet, 12-Cold water outlet, 13-Cleaning port, 131-Limit slide, 132-Notch, 133-Triangle mark;
[0031] 20-Cleaning plug, 21-Plug head, 211-Limiting protrusion, 212-First slot, 213-Straight mark, 22-Spring, 23-Center screw, 231-First thread, 232-Second thread, 233-Wing, 24-Base, 241-Guide hole, 242-Second slot, 25-First filter screen, 26-Sealing ring, 27-Second filter screen. Detailed Implementation
[0032] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0038] like Figures 1 to 12 As shown, it is a filter device 100 for a wall-hung boiler according to an embodiment of the present invention.
[0039] like Figures 1 to 4As shown, the filter device 100 of the wall-hung boiler includes a three-way valve 10 and a cleaning plug 20 detachably mounted on the three-way valve 10. The three-way valve 10 provides a water valve structure with a three-way interface for connecting the cold water interface of the wall-hung boiler, an external water pipe, and the cleaning plug 20. The cleaning plug 20 is used to filter the cold water entering from the external water pipe and flowing towards the cold water interface.
[0040] The following text, combined with Figures 1 to 12 As shown, the filter device 100 of the wall-hung boiler described above will be further explained.
[0041] like Figure 5 and Figure 6 As shown, the three-way valve 10 has a cold water inlet 11, a cold water outlet 12, and a cleaning port 13. The cold water inlet 11, cold water outlet 12, and cleaning port 13 are distributed in a T-shape, and the cleaning port 13 is located between the cold water inlet 11 and the cold water outlet 12. The inlet end of the cleaning port 13 has a limiting groove 131 and a notch 132 connecting the limiting groove 131. The limiting groove 131 is a circular or arc-shaped groove, and the notch 132 is located on the track of the limiting groove 131.
[0042] like Figures 7 to 10 As shown, the cleaning plug 20 includes: a plug head 21 passing through the inlet end of the cleaning socket 13, a spring 22 sleeved on the plug head 21, a central screw 23 connected at one end to the plug head 21, a base 24 connected to the other end of the central screw 23, and a first filter screen 25 surrounding the outer periphery of the central screw 23.
[0043] Combination Figure 3 and Figure 7 As shown, the plug head 21 is inserted into the cold water inlet 11 along the axial direction of the cold water inlet 11. One end of the plug head 21 is provided with a limiting protrusion 211, which enters the limiting groove 131 from the notch 132. The other end of the plug head 21 is provided with a first retaining groove 212, which is an annular groove.
[0044] like Figure 3 As shown, spring 22 is sleeved on the outer periphery of plug head 21. One end of spring 22 abuts against plug head 21, and the other end of spring 22 abuts against the inner wall of cleaning port 13. Spring 22 is used to generate a driving force to push plug head 21 outward. When the limiting protrusion 211 enters the limiting slide groove 131 and is misaligned with the notch 132, under the action of spring 22, even if the water pressure in the three-way valve 10 is low, it can ensure that plug head 21 is in a tight state, so that limiting protrusion 211 is not easy to displace.
[0045] Combination Figure 9 and Figure 11As shown, one end of the central screw 23 is provided with a first thread 231 for connecting the bolt head 21, and the other end of the central screw 23 is provided with a second thread 232 for connecting the base plate 24. In order to facilitate the operators to distinguish the corresponding connection ends, in this embodiment, the first thread 231 is an external thread, while the second thread 232 is an internal thread.
[0046] like Figure 12 As shown, the chassis 24 is provided with guide holes 241 evenly spaced along the circumference. The chassis 24 is also provided with a second slot 242, which is also an annular groove. Figure 9 As shown, the first filter 25 has a cylindrical structure. One end of the first filter 25 is inserted into the first slot 212, and the other end of the first filter 25 is inserted into the second slot 242.
[0047] In addition, combined Figure 3 and Figure 7 As shown, in this embodiment, the cleaning plug 20 may further include a sealing ring 26 fitted onto the plug head 21. The sealing ring 26 is located between the spring 22 and the first filter screen 25. The sealing ring 26 can improve the sealing between the plug head 21 and the cold water inlet 11.
[0048] Brief description of working principle:
[0049] like Figure 3 As shown, the arrows indicate the direction of water flow. The cleaning plug 20 is installed in the three-way valve 10 using a pin. When the first filter screen 25 needs to be removed for cleaning and maintenance, rotate the plug head 21 so that the limiting protrusion 211 slides into the notch 132. At this time, under the action of water pressure and spring 22, the cleaning plug 20 pops out from the cold water inlet 11. After removing the cleaning plug 20, unscrew the base 24 from the central screw 23, and then the first filter screen 25 can be removed for maintenance. After the first filter screen 25 has been maintained, reassemble the cleaning plug 20 and insert it into the cold water inlet 11. Then rotate the plug head 21 to misalign the limiting protrusion 211 with the notch 132.
[0050] Based on the above working principle, further improvements can be made to further reduce the difficulty of operating the equipment.
[0051] For example, such as Figure 7 As shown, in this embodiment, a straight-line mark 213 is provided on the outer end face of the bolt head 21, and the straight-line mark 213 and the limiting protrusion 211 are located on the same straight line. When the limiting protrusion 211 enters the limiting groove 131, the operator can know the position of the limiting protrusion 211 through the straight-line mark 213, reducing the difficulty of operation.
[0052] For example, such as Figure 5As shown, in this embodiment, the outer end face of the cold water inlet 11 is also provided with a triangular mark 133, which is offset from the notch 132 in the circumferential direction. The triangular mark 133 can be used to mark a preset dwell position, which is convenient for operators.
[0053] For example, such as Figure 11 As shown, in this embodiment, the outer periphery of the central screw 23 is provided with radially extending winglets 233. The winglets 233 are used to provide a stable and reliable gripping area for the operator to rotate the central screw 23.
[0054] For example, in other embodiments, the three-way valve 10 can be a transparent valve body. A transparent three-way valve 10 allows operators to visually observe the state of the first filter screen 25.
[0055] In addition, combined Figure 3 , Figure 7 , Figure 8 ,as well as Figure 10 As shown, in this embodiment, the cleaning plug 20 further includes a second filter 27 sleeved on the outer periphery of the first filter 25. The second filter 27 is sandwiched between the plug head 21 and the base 24. The dual filter design can improve the filtration effect.
[0056] To further optimize the filtration effect, the pore size of the second filter screen 27 can be set to be smaller than that of the first filter screen 25. The incoming cold water first passes through the large-pore first filter screen 25 to filter out larger impurities, and then passes through the small-pore second filter screen 27 to filter out smaller impurities. Here, because the pores of the second filter screen 27 are smaller, its overall structural stability is weaker (relatively softer). Therefore, instead of using grooves to limit the ends of the second filter screen 27, it is fitted onto the outer periphery of the first filter screen 25 and axially limited by the plug head 21 and the base 24 to prevent the second filter screen 27 from deforming and detaching under the impact of the water flow.
[0057] The aforementioned filter device 100 of the wall-hung boiler uses a three-way valve 10 to construct a water circuit, and then uses a removable cleaning plug 20 to achieve the filtration function. The filter screen can be cleaned and maintained without having to remove the three-way valve 10 from the cold water interface of the wall-hung boiler and the external water pipe, thereby reducing the difficulty of equipment maintenance.
[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.
[0059] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A filtration device for a wall-hung boiler, characterized in that, include: Three-way valve; The three-way valve is equipped with a cold water inlet, a cold water outlet, and a cleaning port; The cleaning port is located between the cold water inlet and the cold water outlet; The inlet end of the cleaning port is provided with a limiting groove and a notch that connects to the limiting groove; as well as A cleaning plug that can be detachably installed on the three-way valve; The cleaning plug includes: a plug head passing through the inlet end of the cleaning port, a spring sleeved on the plug head, a central screw connected to one end of the plug head, a base connected to the other end of the central screw, and a first filter screen surrounding the outer periphery of the central screw; one end of the plug head is provided with a limiting protrusion, which enters the limiting groove from the notch; the other end of the plug head is provided with a first retaining groove; one end of the spring abuts against the plug head, and the other end of the spring abuts against the inner wall of the cleaning port; one end of the central screw is provided with a first thread connecting to the plug head, and the other end of the central screw is provided with a second thread connecting to the base; the base is provided with guide holes evenly spaced circumferentially; the base is also provided with a second retaining groove; one end of the first filter screen is inserted into the first retaining groove, and the other end of the first filter screen is inserted into the second retaining groove.
2. The filtration device for a wall-hung boiler according to claim 1, characterized in that, A vertical mark is provided on the outer end face of the plug, and the vertical mark is located on the same straight line as the limiting protrusion.
3. The filtration device for a wall-hung boiler according to claim 2, characterized in that, The outer end face of the cold water inlet is also provided with a triangular mark, which is offset from the notch in the circumferential direction.
4. The filtration device for a wall-hung boiler according to claim 1, characterized in that, The cleaning plug also includes a sealing ring fitted onto the plug head; the sealing ring is located between the spring and the first filter screen.
5. The filtration device for a wall-hung boiler according to claim 1, characterized in that, The cleaning plug further includes a second filter screen sleeved on the outer periphery of the first filter screen; the second filter screen is sandwiched between the plug head and the chassis.
6. The filtration device for a wall-hung boiler according to claim 5, characterized in that, The pore size of the second filter screen is smaller than that of the first filter screen.
7. The filtration device for a wall-hung boiler according to claim 1, characterized in that, The outer periphery of the central screw is provided with radially extending fins.
8. The filtration device for a wall-hung boiler according to claim 1, characterized in that, The three-way valve has a transparent valve body.