Slow release device

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses a slow release device. The slow release device comprises a barrel with two open ends and two end covers arranged at the two ends of the barrel, the barrel is formed by bending a plate-shaped structure in a surrounding mode, each end cover is connected with the barrel through a bending part, the end covers, the bending parts and the barrel are integrally formed, clamping structures are arranged on the end covers and / or the barrel, and the clamping structures are connected with the clamping structures. When the end covers cover the end parts of the barrel body, the clamping structures are used for clamping and fixing the barrel body and the end covers, the barrel body and the two end covers are encircled to form a filter cartridge with a containing cavity, and at least part of the surface of the filter cartridge is provided with filter holes communicated with the containing cavity. According to the slow release device disclosed by the utility model, the number of parts can be reduced, and the assembly efficiency is improved. The water heater is provided with the slow release device, and the overall assembly efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a slow-release device. Background Art

[0002] City tap water usually contains soluble calcium salts, magnesium salts, etc. After heating, they will become insoluble calcium and magnesium salts, which will adhere to the inside of the water heater tank, affecting the heating efficiency and service life. Therefore, a slow-release box filled with scale inhibitor is provided in the water heater to reduce the precipitation of scale after water heating. The existing slow-release box has a large number of components, usually a box body plus at least one box cover. The box body and the box cover are formed by injection molding or machining, and the components are connected by processes such as welding, riveting or screwing, resulting in low assembly efficiency. Summary of the Utility Model

[0003] The first technical problem solved by the utility model is to provide a slow-release device, which can effectively solve the problems of the existing slow-release box having a large number of components and low assembly efficiency.

[0004] The above technical problem is solved by the following technical solutions:

[0005] Provide a slow-release device, the slow-release device includes a cylinder body with openings at both ends and two end covers arranged at both ends of the cylinder body. The cylinder body is formed by bending and surrounding a plate-like structure. Each end cover is connected to the cylinder body through a bending part, and the end cover, the bending part and the cylinder body are integrally formed; a clamping structure is provided on the end cover and / or the cylinder body. When the end cover covers the end of the cylinder body, the clamping structure is used to clamp and fix the cylinder body and the end cover. The cylinder body and the two end covers enclose a filter cylinder with a cavity, and at least part of the surface of the filter cylinder is provided with filter holes communicating with the cavity.

[0006] The slow-release device of the utility model, compared with the background art, has the beneficial effects that: the slow-release device includes a cylinder body with openings at both ends and two end covers arranged at both ends of the cylinder body. The cylinder body is formed by bending and surrounding a plate-like structure. The end cover is integrally formed with the cylinder body through a bending part, which can reduce the number of components. When in use, one end cover is bent towards the cylinder body, and the end cover is clamped and fixed to the cylinder body through the clamping structure on the end cover to cover and block one end of the cylinder body; then materials such as scale inhibitor are put into the cylinder body from the opening at the other end of the cylinder body, and then the remaining end cover is bent towards the cylinder body to block the cylinder body and is clamped and fixed to the cylinder body through the clamping structure. Finally, the two end covers and the cylinder body are closed to form a filter cylinder. At least part of the surface of the filter cylinder is provided with filter holes communicating with the cavity, which can treat the external water quality. Compared with connection methods such as welding and riveting, the clamping connection between the end cover and the cylinder body is more convenient and does not require special assembly tools, thus improving the assembly efficiency and reducing the processing cost.

[0007] In one embodiment, the cylinder body includes a fixing part and cylinder parts connected to both sides of the fixing part. One side of the two cylinder parts is bent and connected to the fixing part, and the end cover is connected to the fixing part through the bending part.

[0008] In one embodiment, the clamping structure includes a first clamping part, a second clamping part, a third clamping part and a fourth clamping part. The first clamping part and the second clamping part are arranged on the end cover, and the third clamping part and the fourth clamping part are arranged on the cylinder part.

[0009] Wherein, one of the first clamping part and the third clamping part is provided with a first clamping hole, and the other has a first clamping buckle. The first clamping buckle can be inserted into the first clamping hole to limit the rotation of the end cover; and / or,

[0010] One of the second clamping part and the fourth clamping part has a second clamping hole, and the other is a second clamping buckle. The second clamping buckle can be inserted into the second clamping hole to limit the rotation of the end cover.

[0011] In one embodiment, the first clamping part is provided with the first clamping hole, and the second clamping part is provided with the second clamping hole. The first clamping hole and the second clamping hole are communicated to form an enclosing groove with an inlet. The first clamping hole and the second clamping hole are located at both ends of the enclosing groove. The first clamping buckle passes through the enclosing groove and abuts against the hole wall of the first clamping hole, and the second clamping buckle passes through the enclosing groove and abuts against the hole wall of the second clamping hole to limit the two cylinder parts from moving away from each other.

[0012] In one embodiment, the first clamping buckle includes a first convex part pressed above the end cover, and the second clamping buckle includes a second convex part pressed above the end cover. The pressing width of the first convex part is L1, and the pressing width of the second convex part is L2. When enclosed, there is a first gap between the two cylinder parts, and the width of the first gap is L3, and L3>L1 + L2.

[0013] In one embodiment, along the circumferential direction of the filter cylinder, a locking notch is formed between the first clamping buckle and the second clamping buckle. The bottom of the enclosing groove is provided with a retaining part protruding radially along the end cover, and the retaining part can be embedded in the locking notch.

[0014] In one embodiment, the slow-release device further includes an installation sleeve for sleeving and connecting to a tubular structure. The installation sleeve includes two claw parts, and the cylinder body includes two cylinder parts surrounding along the circumferential direction. The two claw parts are respectively connected to the two cylinder parts, and the two claw parts can be relatively enclosed to form the installation sleeve.

[0015] In one embodiment, the jaws and the openings of the connected cylindrical portions face in opposite directions, and along the axial direction of the filter cartridge, the two jaws are staggered;

[0016] Alternatively, the jaws and the openings of the connected cylindrical portions face in the same direction, and along the axial direction of the filter cartridge, the two jaws are arranged opposite to each other.

[0017] In one embodiment, along the circumferential direction of the mounting sleeve, a second gap is provided between the two jaws to form a mounting notch for inserting the tubular structure into the mounting sleeve.

[0018] In one embodiment, a guiding portion is provided at the end of the jaw, and the guiding portion extends obliquely away from the mounting notch; and / or,

[0019] A second reinforcing rib extending along the circumferential direction of the mounting sleeve is provided on the jaw. Description of the Drawings

[0020] Figure 1 is a schematic structural view of the sustained-release device provided by an embodiment of the present invention;

[0021] Figure 2 is Figure 1 a partially enlarged schematic structural view of part A in

[0022] Figure 3 is a schematic structural view of the sustained-release device provided by an embodiment of the present invention when the end cover is not rotated and closed;

[0023] Figure 4 is an unfolded schematic view of the sustained-release device provided by an embodiment of the present invention;

[0024] Figure 5 is a front view of the structure of the sustained-release device provided by an embodiment of the present invention;

[0025] Figure 6 is a top view of the structure of the sustained-release device provided by an embodiment of the present invention.

[0026] Reference Numerals:

[0027] 1. Filter cartridge; 10. Filter holes; 11. Cylindrical body; 111. Cylindrical portion; 112. First buckle; 1121. First protrusion; 113. Second buckle; 1131. Second protrusion; 114. Locking notch; 115. Fixed portion; 12. End cover; 121. First card hole; 122. Second card hole; 123. Enclosing groove; 1231. Entrance; 124. Anti-back-off portion; 125. Third protrusion; 126. Fourth protrusion; 13. First reinforcing rib;

[0028] 2. Mounting sleeve; 21. Claw; 22. Mounting notch; 23. Guide portion; 24. Second reinforcing rib. Detailed implementation manner

[0029] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0031] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0032] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mount", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0033] As Figures 1 - 3 shown, the embodiment of the present utility model first provides a sustained-release device. The sustained-release device includes a cylindrical body 11 with openings at both ends and two end caps 12 provided at both ends of the cylindrical body 11. The cylindrical body 11 is formed by bending and enclosing a plate-like structure. Each end cap 12 is connected to the cylindrical body 11 through a bending portion, and the end cap 12, the bending portion and the cylindrical body 11 are integrally formed, which can reduce the number of components. During processing, a whole sheet metal part in a plate shape is used for blanking, and through processes such as cutting, the planar shape and connection structure of the above components are formed (refer to Figure 4), then, the planar cylinder body 11 is bent and wound, and closed to form a cylindrical cylinder body 11. At the same time, a bent portion is formed by bending between the two end caps 12 and the cylinder body 11. During use, one end cap 12 is covered and sealed at one end of the cylinder body 11, and the end cap 12 is clamped and fixed to the cylinder body 11 through a clamping structure; then, materials such as scale inhibitors are put into the opening at the other end of the cylinder body 11, and then the remaining end cap 12 is bent towards the cylinder body 11 to seal the cylinder body 11, and is clamped and fixed to the cylinder body 11 through a clamping structure. Finally, the two end caps 12 and the cylinder body 11 are closed to form the filter cartridge 1.

[0034] At least part of the surface of the filter cartridge 1 is provided with filter holes 10 communicating with the cavity. The scale inhibitor in the cavity can be slowly released to the outside through the filter holes 10, and can treat the external water quality. Compared with connection methods such as welding and riveting, the clamping connection between the end cap 12 and the cylinder body 11 is more convenient and does not require special assembly tools, thereby improving the assembly efficiency and reducing the processing cost.

[0035] In one embodiment, both the end cap 12 and the cylinder body 11 are provided with filter holes 10, and the filter holes 10 are distributed over the entire surface of the filter cartridge 1, making the slow release process of the scale inhibitor more uniform. Of course, in other embodiments, the filter holes 10 communicating with the cavity may also be provided only on part of the surface of the filter cartridge 1, and the accompanying drawings of this embodiment are not limiting.

[0036] In one embodiment, as Figure 4 shown, the cylinder body 11 includes a fixing portion 115 and cylinder portions 111 connected to both sides of the fixing portion 115. The fixing portion 115 extends along the length direction of the filter cartridge 1 to form a long strip structure. The two end caps 12 are respectively connected to both ends of the fixing portion 115 through the bent portion, which can increase the connection area between the end cap 12 and the fixing portion 115. In this way, no fracture will occur when the end cap 12 is repeatedly rotated to cover or open. When assembling the unfolded filter cartridge 1 after blanking (refer to Figure 4 ), the two end caps 12 and the cylinder portions 111 on both sides are bent with the fixing portion 115 as a reference, so that the cylinder portions 111 and the end cap 12 rotate relative to the fixing portion 115 and surround each other, and the assembly process is simple.

[0037] In one embodiment, one side of at least one end cap 12 is clamped to the two cylinder portions 111 at the same time, and the other side is rotatably connected to one of the cylinder portions 111. In this way, when the end cap 12 is clamped to the two cylinder portions 111 at the same time, the relative position between the two cylinder portions 111 can be fixed and the cavity can be closed, ensuring that the filter cartridge 1 is assembled in place, and there is no need to provide a clamping structure between the two cylinder portions 111.

[0038] Alternatively, in another embodiment, one side of the two cylindrical parts 111 is bent and connected, and the other side is engaged with each other. The engagement structure between the two cylindrical parts 111 ensures the structural stability of the cylinder body 11. The end cover 12 is rotatably connected to one of the cylindrical parts 111 through a bending part and is engaged with the other cylindrical part 111, which can simplify the engagement structure between the end cover 12 and the cylindrical part 111.

[0039] Specifically, when the end cover 12 engages with the two cylindrical parts 111 simultaneously, the end cover 12 includes a first engaging part and a second engaging part. The two cylindrical parts 111 are respectively provided with a third engaging part and a fourth engaging part. The first engaging part and the third engaging part are engaged with each other, and the second engaging part and the fourth engaging part are engaged with each other. Since the positions of the first engaging part and the second engaging part on the end cover 12 are fixed, when the end cover 12 engages with the two cylindrical parts 111 through the first engaging part and the second engaging part respectively, the relative positions between the two cylindrical parts 111 are also fixed, maintaining the structural stability of the filter cylinder 1 and the closure of the cavity, without the need to additionally provide a connection structure between the two cylindrical parts 111.

[0040] A specific implementation manner of the engaging structure of the end cover 12 is as follows: One of the first engaging part and the third engaging part is provided with a first engaging hole 121, and the other has a first engaging buckle 112. The first engaging buckle 112 can be inserted into the first engaging hole 121 to limit the rotation of the end cover 12. Therefore, two-point connection is achieved between the end cover 12 and one of the cylindrical parts 111. One connection is a rotatable connection, and the other is the engagement between the first engaging buckle 112 and the first engaging hole 121. The position of the end cover 12 relative to the cylindrical part 111 is completely defined and will not move or fall off.

[0041] Similarly, one of the second engaging part and the fourth engaging part has a second engaging hole 122, and the other is a second engaging buckle 113. The second engaging buckle 113 can be inserted into the second engaging hole 122 to limit the rotation of the end cover 12. Therefore, two-point connection is also achieved between the end cover 12 and the other cylindrical part 111. One connection is a rotatable connection, and the other is the engagement between the second engaging buckle 113 and the second engaging hole 122. The position of the end cover 12 relative to the other cylindrical part 111 is also completely defined and will not move or fall off.

[0042] As Figure 2 shown, in one embodiment, the first engaging part is provided with a first engaging hole 121, and the second engaging part is provided with a second engaging hole 122, which can simplify the processing technology of the end cover 12, and the same cutting or drilling process can be used. Correspondingly, the first engaging buckle 112 is arranged on one of the cylindrical parts 111, and the second engaging buckle 113 is arranged on the other cylindrical part 111.

[0043] The first card hole 121 and the second card hole 122 are communicatively arranged to form an enclosing groove 123 having an inlet 1231. The first card hole 121 and the second card hole 122 are located at both ends of the enclosing groove 123. The first buckle 112 can pass through the inlet 1231 and be inserted into the enclosing groove 123 to abut against the hole wall of the first card hole 121. The second buckle 113 can pass through the inlet 1231 and be inserted into the enclosing groove 123 to abut against the hole wall of the second card hole 122. In this way, the first buckle 112 and the second buckle 113 can be respectively inserted into the first card hole 121 and the second card hole 122 without deformation. The abutment between the first buckle 112 and the hole wall of the first card hole 121 and the abutment between the second buckle 113 and the hole wall of the second card hole 122 can limit the mutual separation between the two cylindrical parts 111, ensure the structural stability of the filter cartridge 1 and the closure of the cavity, and simplify the overall setting of the clamping structure.

[0044] The first buckle 112 includes a first convex part 1121 pressed above the end cap 12. The second buckle 113 includes a second convex part 1131 pressed above the end cap 12. When the first buckle 112 is clamped in the first card hole 121, the first convex part 1121 presses above the end cap 12 to limit the end cap 12 from detaching from the cylindrical part 111. When the second buckle 113 is clamped in the second card hole 122, the second convex part 1131 presses above the end cap 12 to limit the end cap 12 from detaching from the cylindrical part 111.

[0045] As Figure 5 shown, the pressing width of the first convex part 1121 is L1, and the pressing width of the second convex part 1131 is L2. When the first buckle 112 is inserted into the first card hole 121 along the enclosing groove 123, and the second buckle 113 is inserted into the second card hole 122 along the enclosing groove 123. When enclosing, there is a first gap between the two cylindrical parts 111, and the width of the first gap is L3, L3 > L1 + L2, so that the first buckle 112 and the second buckle 113 can pass through the inlet 1231 and enter the enclosing groove 123. When it is necessary to cover the end cap 12, rotate and squeeze the two cylindrical parts 111 to make them converge until the first gap is 0. In this way, the end cap 12 can be located above the first buckle 112 and the second buckle 113, so that the enclosing groove 123 can pass through the first convex part 1121 and the second convex part 1131 from top to bottom, so that the end cap 12 can close one end of the cavity. Then, relax the two cylindrical parts 111 to make them return to the natural state, and the first convex part 1121 and the second convex part 1131 move away from each other and both press above the end cap 12, realizing the clamping between the first buckle 112 and the first card hole 121 and the clamping between the second buckle 113 and the second card hole 122. The assembly process is simple, the clamping is reliable, and the end cap 12 and the two cylindrical parts 111 will not become loose.

[0046] Preferably, L3 = L1 + L2 + 0.3 mm, so that the first buckle 112 and the second buckle 113 can easily pass through the entry port 1231 into the surrounding groove 123, and the first gap between the two barrels 111 will not be too large, ensuring the sealing of the cavity and preventing the sustained-release agent from leaking directly through the first gap. L1 and L2 can be equal or unequal, and this embodiment does not impose specific restrictions.

[0047] The edge of the end cover 12 is provided with a third protrusion 125 and a fourth protrusion 126 to respectively surround and form the first clamping hole 121 and the second clamping hole 122. The third protrusion 125 and the fourth protrusion 126 are arranged opposite to each other, and the gap between the third protrusion 125 and the fourth protrusion 126 forms an entry port 1231. When the first buckle 112 is inserted into the first clamping hole 121, the third protrusion 125 is pressed against the outside of the first buckle 112 to prevent the first buckle 112 from slipping out of the first clamping hole 121; when the second buckle 113 is inserted into the second clamping hole 122, the fourth protrusion 126 is pressed against the outside of the second buckle 113 to prevent the second buckle 113 from falling off from the second clamping hole 122. The third protrusion 125 and the first protrusion 1121 form a mutually perpendicular interlocking structure, and the fourth protrusion 126 and the second protrusion 1131 form a mutually perpendicular interlocking structure, and the clamping is more reliable.

[0048] In one embodiment, along the circumference of the filter cartridge 1, a locking notch 114 is formed between the first buckle 112 and the second buckle 113, and the locking notch 114 can be formed by cutting. The bottom of the surrounding groove 123 is provided with a stopper 124 protruding along the radial direction of the end cover 12, and the stopper 124 can be embedded in the locking notch 114, so that the stopper 124 can prevent the relative movement between the two barrels 111, and lock the first buckle 112 and the first clamping hole 121, and the second buckle 113 and the second clamping hole 122.

[0049] In this embodiment, the two end covers 12 at both ends and their snap-fit ​​structures are arranged in a mirror-symmetrical manner with respect to the middle section of the filter cartridge 1. Correspondingly, the snap-fit ​​structures at both ends of the two barrel portions 111 are also arranged in a mirror-symmetrical manner with respect to the middle section of the filter cartridge 1. In this way, the component structure can be further simplified, making the processing technology of the filter cartridge 1 simpler.

[0050] Of course, in other embodiments, the two end covers 12 may also have a non-mirror-symmetric snap-fit ​​structure, which is not limited to the drawings of this embodiment.

[0051] Since the end cover 12 is a planar structure, a first reinforcing rib 13 is provided on the end cover 12 to increase the structural strength. Figure 3 As shown, the first reinforcing rib 13 is an annular reinforcing rib, which can be formed by stamping the end cover 12 .

[0052] To achieve the installation of the slow-release device on the water heater, the slow-release device further includes an installation sleeve 2, and the installation sleeve 2 is used for sleeving and connecting to a tubular structure (not shown in the figure). The tubular structure can be a heating pipe or other structures of the water heater, and no specific limitation is made in this embodiment. The installation sleeve 2 includes two clamping claws 21, and the two clamping claws 21 are respectively connected to the two cylindrical parts 111. When the two cylindrical parts 111 enclose to form a cavity, the two clamping claws 21 can be relatively surrounded to form the installation sleeve 2.

[0053] In one embodiment, the opening direction of the clamping claw 21 is opposite to that of the connected cylindrical part 111. That is, the clamping claw 21 is connected to the edge of the corresponding cylindrical part 111 and is arranged in an S shape, and along the axial direction of the filter cartridge 1, the two clamping claws 21 are staggered. In this way, when the two cylindrical parts 111 enclose to form a cavity, the two clamping claws 21 are staggered and passed through to form the installation sleeve 2 to clamp different axial positions of the tubular structure. This clamping method of the two staggered clamping claws 21 on the tubular structure increases the stability between the two cylindrical parts 111. When the two clamping claws 21 clamp the tubular structure, the two clamping claws 21 respectively apply a tensile force to the edges of the connected cylindrical parts 111, so that the two cylindrical parts 111 always maintain a tendency to approach each other, avoiding the deformation of the filter cartridge 1 caused by the increase of the first gap.

[0054] In another embodiment, the opening direction of the clamping claw 21 is the same as that of the connected cylindrical part 111, and along the axial direction of the filter cartridge 1, the two clamping claws 21 are relatively arranged. In this way, the clamping claw 21 is connected to the edge of the cylindrical part 111 and is in a "3"-shaped structure, and the openings of the two clamping claws 21 are relatively arranged. When the two cylindrical parts 111 enclose to form a cavity, the two clamping claws 21 can approach each other and relatively buckle to clamp the same axial position of the tubular structure.

[0055] To improve the clamping reliability of the installation sleeve 2 and avoid the filter cartridge 1 from shaking on the tubular structure, along the axial direction of the filter cartridge 1, a plurality of clamping claws 21 are spacedly arranged on the filter cartridge 1, and the plurality of clamping claws 21 are arranged in a one-to-one relative or one-to-one staggered manner. When the clamping claw 21 is connected to the edge of the cylindrical part 111 and is in a "3"-shaped structure, the plurality of clamping claws 21 are arranged in a one-to-one relative manner; when the clamping claw 21 is connected to the edge of the cylindrical part 111 and is in an S-shaped structure, the plurality of clamping claws 21 are arranged in a one-to-one staggered manner.

[0056] In one embodiment, along the circumferential direction of the installation sleeve 2, there is a second gap between the two clamping claws 21 to form an installation notch 22, and the installation notch 22 is used for the tubular structure to be inserted into the installation sleeve 2. This facilitates the clamping of the installation sleeve 2 to the tubular structure through the installation notch 22, and it is not necessary to sleeve from the end of the tubular structure, so that the slow-release device can be quickly disassembled and assembled on the tubular structure, which is convenient to use.

[0057] To increase the clamping reliability of the installation sleeve 2 and prevent the installation sleeve 2 from sliding on the tubular structure, the inner diameter of the installation sleeve 2 is smaller than the outer diameter of the tubular structure, and the difference between the inner diameter of the installation sleeve 2 and the outer diameter of the tubular structure is greater than 0.5 mm. For example, the inner diameter of the installation sleeve 2 is 0.7 mm smaller than the outer diameter of the tubular structure. In other embodiments, the inner diameter of the installation sleeve 2 may also be 0.8 mm or 0.9 mm smaller than the outer diameter of the tubular structure, but the difference should not be greater than 1.5 mm to avoid excessive tension on the tubular structure when the difference is too large, which may cause the installation sleeve 2 to rupture.

[0058] The width of the installation notch 22 is smaller than the radius of the installation sleeve 2 to ensure the wrapping area of the claw 21 around the tubular structure and prevent the tubular structure from easily slipping out of the installation notch 22.

[0059] When the tubular structure enters the installation sleeve 2 through the installation notch 22, the tubular structure can squeeze the two claws 21, which also increases the tension of the claws 21 on the barrel part 111, making the structural strength of the filter cartridge 1 better.

[0060] To improve the convenience of the tubular structure entering the installation sleeve 2 through the installation notch 22, a guiding portion 23 is provided at the end of the claw 21, and the guiding portion 23 extends obliquely away from the installation notch 22. Since the distance between the ends of the two guiding portions 23 is greater than the width of the installation notch 22, the guiding portion 23 guides the tubular structure, facilitating the alignment of the tubular structure with the installation notch 22 and avoiding deformation of the installation sleeve 2 caused by the tubular structure squeezing the claw 21 during the installation process.

[0061] In one embodiment, second reinforcing ribs 24 extending circumferentially along the installation sleeve 2 are provided on the claws 21, as Figure 6 shown. The second reinforcing ribs 24 can increase the structural strength of the claws 21 and tighten the claws 21 when the claws 21 clamp the tubular structure, so that the claws 21 can always tightly clamp the tubular structure, avoiding deformation of the installation sleeve 2 caused by disassembling and assembling the slow-release device on the tubular structure multiple times.

[0062] An embodiment of the present utility model further provides a water heater, which includes the slow-release device as described above. The slow-release device includes a cylindrical body 11 with openings at both ends and two end caps 12 arranged at both ends of the cylindrical body 11. The cylindrical body 11 is formed by bending and enclosing a plate-shaped structure. The end cap 12 is rotatably connected to the cylindrical body 11 through a bending part and is integrally formed with the cylindrical body 11, reducing the number of components. During processing, a whole sheet metal part in the shape of a plate is used for blanking, and through processes such as cutting, the planar outer shape and connection structure of the above components are formed. Then, the planar cylindrical body 11 is bent and wound, and rotated and closed to form a cylindrical cylindrical body 11. During assembly, through the bending part between the two end caps 12 and the cylindrical body 11, the end cap 12 can rotate to block both ends of the cylindrical body 11 and is clamped and fixed to the cylindrical body 11 through a clamping structure, enclosing to form a filter cylinder 1 with a cavity. The scale inhibitor in the cavity can be slowly released to the outside through the filter holes 10 on the surface of the filter cylinder 1. The clamping connection between the end cap 12 and the cylindrical body 11 is relatively convenient, without the need to use fasteners such as screws, nor special assembly tools, thus simplifying the assembly process, improving the assembly efficiency, and further reducing the overall processing cost of the water heater.

[0063] Finally, an embodiment of the present utility model also provides an assembly method for the slow-release device, which is used for assembling the above slow-release device. The assembly method includes the following steps:

[0064] Step 1: Cut the whole sheet metal part, and through processes such as cutting and drilling, form an integrally formed fixing part 115, two cylindrical parts 111, and two end caps 12. At this time, it is in an unfolded planar structure, as Figure 4 shown, and at the same time, a clamping structure is formed.

[0065] Step 2: Bend the two cylindrical parts 111 respectively to make them have a curvature, and bend the connection parts of the two end caps 12 and the fixing part 115 to form bending parts.

[0066] Step 3: Rotate the two cylindrical parts 111 relative to the fixing part 115 to make them enclose, and then rotate the two end caps 12 relative to the fixing part 115 respectively. While the end caps 12 cover the cavity, make the first buckle 112 of the cylindrical part 111 clamp the first card hole 121 of the end cap 12, and the second buckle 113 of the other cylindrical part 111 clamp the second card hole 122 of the end cap 12 to complete the assembly of the filter cylinder 1. In this step, it is necessary to squeeze the two cylindrical parts 111, and utilize the first gap between the two cylindrical parts 111 to change the first gap from L3 to 0, facilitating the clamping process.

[0067] Step 4: Insert the tubular structure between the two claws 21 through the installation notch 22 to complete the installation of the slow-release device on the water heater.

[0068] It should be noted that in the above step 3, before covering the two end caps 12, the scale inhibitor can be filled into the filter cartridge 1 through either end of the cavity. When the scale inhibitor needs to be replaced, pull the filter cartridge 1 to loosen the mounting sleeve 2 from the tubular structure through the mounting notch 22. Then, select either end cap 12, squeeze the two barrel parts 111 again to change the first gap from L3 to 0, and rotate the end cap 12 to release the clamping connection between the end cap 12 and the two barrel parts 111. At this time, the scale inhibitor can be replaced.

[0069] In the above step 1, while forming the two integrally formed barrel parts 111 by processes such as cutting and drilling, the clamping claws 21 are formed by cutting and blanking, so that the two clamping claws 21 and the two barrel parts 111 are integrally formed into an unfolded structure. Then, in the above step 2, while bending the two barrel parts 111, the two clamping claws 21 also need to be bent so that the connection between the barrel parts 111 and the clamping claws 21 is in an S-shaped structure.

[0070] In the specific content of the above specific implementation manner, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combinations of these technical features do not exist in contradiction, they should be considered as the scope recorded in this specification.

[0071] The specific content of the above specific implementation manner only expresses several implementation manners of the present invention. Its description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A sustained-release device, characterized in that: The slow-release device comprises a barrel (11) with openings at both ends and two end covers (12) arranged at both ends of the barrel (11); the barrel (11) is formed by bending and embracing a plate-like structure; each of the end covers (12) is connected to the barrel (11) via a bent portion, and the end cover (12), the bent portion and the barrel (11) are integrally formed; a clamping structure is provided on the end cover (12) and / or the barrel (11); when the end cover (12) is covered on the end of the barrel (11), the clamping structure is used to clamp and fix the barrel (11) and the end cover (12); the barrel (11) and the two end covers (12) together form a filter barrel (1) having a cavity; at least a portion of the surface of the filter barrel (1) is provided with a filter hole (10) communicating with the cavity.

2. The sustained-release device according to claim 1, characterized in that: The cylinder (11) comprises a fixing portion (115) and cylinder portions (111) connected to two sides of the fixing portion (115), one side of the two cylinder portions (111) being bent and connected to the fixing portion (115), and the end cover (12) being connected to the fixing portion (115) via the bent portion.

3. The sustained release device according to claim 2, characterized in that: The clamping structure comprises a first clamping portion, a second clamping portion, a third clamping portion and a fourth clamping portion, the end cover (12) is provided with the first clamping portion and the second clamping portion, and the barrel (111) is provided with the third clamping portion and the fourth clamping portion; Wherein, one of the first clamping portion and the third clamping portion is provided with a first clamping hole (121), and the other has a first clamping buckle (112), and the first clamping buckle (112) can be inserted into the first clamping hole (121) to limit the rotation of the end cover (12); and / or, One of the second clamping portion and the fourth clamping portion has a second clamping hole (122), and the other is a second clamping buckle (113), and the second clamping buckle (113) can be inserted into the second clamping hole (122) to limit the rotation of the end cover (12).

4. The sustained-release device according to claim 3, characterized in that: The first clamping portion is provided with the first clamping hole (121), and the second clamping portion is provided with the second clamping hole (122). The first clamping hole (121) and the second clamping hole (122) are connected to form an enclosing groove (123) having an entrance (1231). The first clamping hole (121) and the second clamping hole (122) are located at two ends of the enclosing groove (123). The first clamping buckle (112) is passed through the enclosing groove (123) and abuts against the hole wall of the first clamping hole (121). The second clamping buckle (113) is passed through the enclosing groove (123) and abuts against the hole wall of the second clamping hole (122) to limit the two barrel portions (111) from moving away from each other.

5. The sustained-release device according to claim 4, characterized in that: The first buckle (112) comprises a first protrusion (1121) crimped onto the top of the end cover (12), and the second buckle (113) comprises a second protrusion (1131) crimped onto the top of the end cover (12), the crimping width of the first protrusion (1121) is L1, and the crimping width of the second protrusion (1131) is L2; ​​when enclosed, a first gap is provided between the two barrel portions (111), the width of the first gap is L3, and L3>L1+L2.

6. The sustained-release device according to claim 4, characterized in that: Along the circumference of the filter cartridge (1), a locking notch (114) is formed between the first buckle (112) and the second buckle (113), and a stopper (124) protruding radially along the end cover (12) is provided at the bottom of the surrounding groove (123), and the stopper (124) can be embedded in the locking notch (114).

7. The sustained-release device according to any one of claims 1 to 6, characterized in that: The slow-release device further comprises a mounting sleeve (2), the mounting sleeve (2) being used for being sleeved and connected to the tubular structure, the mounting sleeve (2) comprising two clamping claws (21), the cylinder body (11) comprising two cylinder parts (111) arranged in a circumferential direction, the two clamping claws (21) being respectively connected to the two cylinder parts (111), and the two clamping claws (21) being able to be arranged relative to each other to form the mounting sleeve (2).

8. The sustained-release device according to claim 7, characterized in that: The claws (21) and the opening of the connected barrel portion (111) are oriented in opposite directions, and along the axial direction of the filter barrel (1), the two claws (21) are arranged alternately; Alternatively, the claws (21) and the opening of the connected barrel portion (111) are oriented in the same direction, and along the axial direction of the filter barrel (1), the two claws (21) are arranged opposite to each other.

9. The sustained-release device according to claim 7, characterized in that: Along the circumference of the mounting sleeve (2), there is a second gap between the two clamping claws (21) to form a mounting gap (22), and the mounting gap (22) is used for inserting the tubular structure into the mounting sleeve (2).

10. The sustained-release device according to claim 9, characterized in that: A guide portion (23) is provided at the end of the claw (21), and the guide portion (23) extends obliquely in a direction away from the installation notch (22); and / or, The claw (21) is provided with a second reinforcing rib (24) extending along the circumference of the mounting sleeve (2).

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