Slow release device and water heater

Abstract

The utility model belongs to the technical field of heat supply, and particularly discloses a slow-release device and a water heater, and the slow-release device comprises a fixed seat, a slow-release structure and a sealing element. The fixing base is provided with a first connecting part and a second connecting part, the second connecting part is cylindrical and located on the periphery of the first connecting part at intervals, the second connecting part is used for being detachably connected to a cylindrical connecting structure of the water heater, and the surface, located between the first connecting part and the second connecting part, of the fixing base forms an inner mounting surface. The slow-release structure is used for containing a slow-release agent and detachably connected to the first connecting part, the sealing part covers the inner mounting surface, one part of the sealing part is clamped between the inner mounting surface and the slow-release structure, and the other part of the sealing part is used for being clamped between the inner mounting surface and the cylindrical connecting structure; therefore, hot water in the water heater can be physically separated from the inner mounting surface of the fixing seat through the sealing piece, and the problem of water leakage at the joint of the fixing seat is effectively avoided.

Description

Technical Field

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

[0002] In the related art, a slow-release structure for accommodating a slow-release agent is usually provided in the water heater, and the slow-release agent includes but is not limited to a softener, a purifier, and a descaling agent, so that the water heater is treated with the slow-release agent, including but not limited to water softening, water purification, and descaling. In order to fix the slow-release structure in the water heater and to facilitate the disassembly and assembly of the slow-release structure in the water heater, an opening connected to the inside of the water heater is usually provided on the outer surface of the water heater, so that the slow-release structure can enter or leave the inside of the water heater through the opening, and a fixing seat is used to connect to the slow-release structure, and the opening is blocked by the fixing seat to fix the slow-release structure in the water heater. After a period of use, water leakage is likely to occur at the connection of the fixing seat. Utility Model Content

[0003] One of the technical problems solved by the utility model is to provide a slow-release device, which can effectively solve the problem that water leakage is easy to occur at the fixing seat.

[0004] The second technical problem solved by the utility model is to provide a water heater, which can effectively solve the problem that water leakage is easy to occur at the fixing seat of the slow-release device during the long-term use of the water heater.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A sustained-release device, comprising:

[0007] A fixing seat, the fixing seat having a first connecting portion and a second connecting portion, the second connecting portion being cylindrical and spaced apart at the outer periphery of the first connecting portion, the second connecting portion being used for being detachably connected to the cylindrical connecting structure of the water heater, and the surface of the fixing seat located between the first connecting portion and the second connecting portion forming an inner mounting surface;

[0008] a sustained-release structure, the sustained-release structure being used to contain a sustained-release agent, the sustained-release structure being detachably connected to the first connecting portion; and

[0009] A sealing member is covered on the inner mounting surface, a part of the sealing member is sandwiched between the inner mounting surface and the slow-release structure, and another part of the sealing member is used to be sandwiched between the inner mounting surface and the cylindrical connecting structure.

[0010] Compared with the background technology, the sustained-release device of the utility model has the following beneficial effects:

[0011] The slow-release structure is detachably connected to the first connection part, which can facilitate the replacement of the slow-release structure later. At the same time, a part of the seal is sandwiched between the inner mounting surface and the slow-release structure, which can improve the sealing and stability of the connection between the slow-release structure and the fixed seat; when used in a water heater, another part of the seal is sandwiched between the inner mounting surface and the cylindrical connection structure, which can improve the sealing between the water heater and the fixed seat, and then the sealing of the connection of the fixed seat can be improved as a whole, and the water heater is not prone to water leakage.

[0012] In one embodiment, the inner mounting surface includes a first surface, a seat surface, and a second surface connected in sequence, the first surface is provided with the first connecting portion, the seat surface surrounds the first surface, the second surface surrounds the seat surface, and the second connecting portion is provided around the outer periphery of the second surface;

[0013] The sealing member includes a first sealing portion, a middle portion and a second sealing portion which are connected in sequence, wherein the first sealing portion is sandwiched between the first surface and the sustained-release structure, the middle portion surrounds the outer circumference of the first sealing portion, and the middle portion covers the seat body surface, the second sealing portion surrounds the outer circumference of the middle portion, and the second sealing portion is used to be sandwiched between the second surface and the cylindrical connecting structure.

[0014] In one embodiment, the fixing seat includes a main body structure and a protruding structure, the main body structure has the second surface, the second connecting portion is arranged on the main body structure, the protruding structure is arranged in the middle of the main body structure, the top surface of the protruding structure is the first surface, and the outer peripheral surface of the protruding structure is the seat body surface; or,

[0015] The first surface, the seat surface and the second surface are all flush.

[0016] In one embodiment, a receiving groove is provided on one side of the fixing seat, the second surface is located at the bottom of the receiving groove, the first connecting portion is located at the side wall of the receiving groove, and the first connecting portion is used to be detachably connected to the outer periphery of the cylindrical connecting structure; or,

[0017] The second surface is located on one end surface of the fixing seat, the first connecting portion is located on the outer periphery of the fixing seat, and the first connecting portion is used for being detachably connected to the inner wall surface of the cylindrical connecting structure.

[0018] In one embodiment, the sustained-release structure includes a tube body, a first blocking cap and a connecting piece. The internal space of the tube body is used to accommodate the sustained-release agent. The outer periphery of the tube body is provided with a plurality of through holes connected to the internal space of the tube body. The first blocking cap blocks one end of the tube body. The connecting piece is provided on the first blocking cap, and the connecting piece is detachably connected to the first connecting part.

[0019] In one embodiment, the slow-release structure further includes a second blocking cap, and the second blocking cap is connected to an end of the tube body away from the first blocking cap by interference sealing.

[0020] In one of the embodiments, the sustained-release structure further comprises a magnesium rod assembly;

[0021] The magnesium rod assembly is arranged in the internal space of the tube body, and the magnesium rod assembly is installed on the second blocking cap and / or the first blocking cap, or the magnesium rod assembly is installed on the second blocking cap and at least partially arranged on a side of the second blocking cap away from the first blocking cap.

[0022] In one embodiment, the tube body includes a first tube portion, an intermediate tube portion and a second tube portion which are connected in sequence, the first blocking cap blocks an end of the first tube portion away from the intermediate tube portion, the interiors of the first tube portion, the intermediate tube portion and the second tube portion are all connected, and the through hole is provided only on the outer peripheries of the first tube portion and the second tube portion.

[0023] In one embodiment, the through hole provided in the first tube portion is symmetrical to the through hole provided in the second tube portion.

[0024] The above second technical problem is solved by the following technical solution:

[0025] A water heater comprises: an inner tank and a slow-release device as described in the aforementioned embodiment, wherein the inner tank is provided with the cylindrical connecting structure, and the two opposite ends of the cylindrical connecting structure are respectively connected to the interior of the inner tank and the exterior of the inner tank, the second connecting portion of the slow-release device is detachably connected to the cylindrical connecting structure, and the sealing portion is clamped between the inner mounting surface and the cylindrical connecting structure.

[0026] Compared with the background technology, the water heater of the utility model has the following beneficial effects:

[0027] Since the fixing seat of the slow-release device described in the above embodiment is not prone to aging during long-term use, the water heater is not prone to water leakage.

[0028] In one embodiment, the cylindrical connecting structure at least partially extends from the interior of the water heater to the outside, and / or the inner wall of the cylindrical connecting structure is provided with a convex ring, the first connecting portion is detachably connected to the inner wall surface of the cylindrical connecting structure, and the second sealing portion is used to be clamped between the second surface and the convex ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic front view of the structure of the slow-release device provided in the first embodiment of the utility model;

[0030] Figure 2 It is a bottom view schematic diagram of the structure of the slow-release device provided in the first embodiment of the utility model;

[0031] Figure 3 for Figure 2 Middle AA section view;

[0032] Figure 4 for Figure 3 A schematic diagram of a local structure when the slow-release device shown in is connected to the cylindrical connecting structure;

[0033] Figure 5 It is a partial structural schematic diagram of the slow-release device provided in the second embodiment of the utility model when it is connected to the cylindrical connecting structure;

[0034] Figure 6 It is a partial structural schematic diagram of the slow-release device provided in the third embodiment of the utility model when it is connected to the cylindrical connecting structure;

[0035] Figure 7 It is a schematic diagram of the structural decomposition of a sustained-release device shown in one embodiment of the utility model;

[0036] Figure 8 It is a structural schematic diagram of a sustained-release device provided in a fourth embodiment of the utility model;

[0037] Fig. 9 for Figure 8 The enlarged schematic diagram of the M in the middle;

[0038] Fig.10 It is a partial structural schematic diagram of the slow-release device (the first end is threadedly connected to the second blocking cap) provided in the fifth embodiment of the utility model;

[0039] Fig.11 It is a structural schematic diagram of a slow-release device provided in a sixth embodiment of the utility model;

[0040] Fig.12 for Fig.11 The enlarged schematic diagram of the N position in the middle;

[0041] Fig.13 A schematic cross-sectional view of the structure of a water heater provided by an embodiment of the utility model;

[0042] Description of labels:

[0043] 1. slow-release device; 10. slow-release structure; 100. tube body; 100a. through hole; 1001. first tube part; 1002. middle tube part; 1003. second tube part; 101. first plugging cap; 102. connector; 103. second plugging cap; 104. magnesium rod assembly; 1040. connecting core; 1040a. first end; 1041. magnesium rod body; 1041a. second end; 11. sealing member; 111. first sealing part; 112. middle part; 113. second sealing part; 12. fixing seat; 120. first surface; 121. seat body surface; 122. second surface; 123. first connecting part; 124. second connecting part; 12a. main structure; 12b. protruding structure; 12c. receiving groove; 12d. screwing part;

[0044] 2. Inner liner; 20. Cylindrical connecting structure; 20a. Protruding ring. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] like Figures 1 to 4 As shown, this embodiment provides a slow-release device 1, including a slow-release structure 10, a sealing member 11 and a fixing seat 12. The fixing seat 12 has a first connecting portion 123 and a second connecting portion 124, the second connecting portion 124 is cylindrical and is spaced at the outer periphery of the first connecting portion 123, the second connecting portion 124 is used to be detachably connected to the cylindrical connecting structure 20 of the water heater, the surface of the fixing seat 12 located between the first connecting portion 123 and the second connecting portion 124 forms an inner mounting surface, the slow-release structure 10 is used to accommodate the slow-release agent, the slow-release structure 10 is detachably connected to the first connecting portion 123, the sealing member 11 is covered on the inner mounting surface, and a part of the sealing member 11 is sandwiched between the inner mounting surface and the slow-release structure 10, and another part of the sealing member 11 is used to be sandwiched between the inner mounting surface and the cylindrical connecting structure 20.

[0050] By making the seal 11 cover the inner mounting surface of the fixing seat 12, when used in a water heater, the sealing of the connection part of the fixing seat 12 can be improved as a whole, and the water heater is not prone to water leakage. At the same time, the slow-release structure 10 can be detachably connected to the first connection part 123, which can facilitate the replacement of the slow-release structure 10 later. In one embodiment, the inner mounting surface includes a first surface 120, a seat surface 121 and a second surface 122 connected in sequence, the first surface 120 is provided with a first connecting portion 123, the seat surface 121 surrounds the first surface 120, the second surface 122 surrounds the seat surface 121, and the outer periphery of the second surface 122 is provided with a second connecting portion 124, the sealing member 11 includes a first sealing portion 111, a middle portion 112 and a second sealing portion 113 connected in sequence, the first sealing portion 111 is sandwiched between the first surface 120 and the slow-release structure 10, the middle portion 112 surrounds the outer periphery of the first sealing portion 111, and the middle portion 112 covers the seat surface 121, the second sealing portion 113 surrounds the outer periphery of the middle portion 112, and the second sealing portion 113 is used to be clamped between the second surface 122 and the cylindrical connecting structure 20, so that when the first connecting part 123 of the fixed seat 12 is connected to the slow-release structure 10, the first sealing part 111 can be used to block the gap between the first surface 120 and the slow-release structure 10 to prevent the hot water in the water heater from leaking to the first connecting part 123. When the second connecting part 124 of the fixed seat 12 is connected to the cylindrical connecting structure 20 of the water heater, the second sealing part 113 can be used to block the gap between the second surface 122 and the cylindrical connecting structure 20 to prevent the hot water in the water heater from leaking to the second connecting part 124, and cooperate with the middle part 112 to cover the seat body surface 121 to prevent the inner mounting surface of the fixed seat 12 from directly contacting the hot water in the water heater.

[0051] In one embodiment, the seal 11 may be a structure adapted to the shape of the first surface 120, the seat surface 121 and the second surface 122, so that the seal 11 has a better fit with the first surface 120, the seat surface 121 and the second surface 122, the seal 11 has a better sealing effect between the fixed seat 12 and the sustained-release structure 10 and between the fixed seat 12 and the cylindrical connecting structure 20, and the covering effect of the seal 11 on the seat surface 121 is more stable.

[0052] In one embodiment, the seal 11 may be made of an elastic material including but not limited to rubber, silicone, etc., so that when the seal 11 is clamped between the first surface 120 and the sustained-release structure 10, and when it is clamped between the second surface 122 and the tubular connecting structure 20, the seal 11 can further seal the gap under the action of elastic force. The seal 11 has good sealing performance. At the same time, since the seal 11 is made of elastic material, it can maintain good sealing performance.

[0053] In one embodiment, one of the first connection portion 123 and the slow-release structure 10 may include a stud or screw structure, and the other may include a screw hole structure, so that the first connection portion 123 and the slow-release structure 10 can be detachably screwed together, or one of the first connection portion 123 and the slow-release structure 10 may include a protrusion, and the other may include a groove, so that the first connection portion 123 and the slow-release structure 10 can be detachably snap-connected.

[0054] Preferably, the first connection part 123 may include a screw hole structure or a slot, and the slow-release structure 10 may include a stud, a screw structure or a snap-on, so that the slow-release structure 10 can partially extend into the first connection part 123 to be screwed or snap-connected with the first connection part 123, while preventing the first connection part 123 from entering the interior of the slow-release structure 10. Therefore, on the one hand, it can prevent the first connection part 123 from occupying more of the internal space of the slow-release structure 10, and on the other hand, it can also prevent the first connection part 123 from entering the internal space of the slow-release structure 10 and contacting the hot water inside the water heater in the internal space of the slow-release structure 10, causing the first connection part 123 to be easily aged. The seal 11 is replaceable and the cost is relatively low.

[0055] In one embodiment, the fixing seat 12 may be made of materials including but not limited to iron, steel and other metal materials. In other words, the fixing seat 12 may be made of a metal alloy or a pure metal material, or the fixing seat 12 may be made of plastic.

[0056] In order to meet various design and use requirements, the fixing seat 12 can be of various structures. Next, several fixing seats 12 of various structures will be exemplarily introduced in conjunction with the accompanying drawings.

[0057] like Figure 3 and Figure 4 As shown, in one embodiment, the fixing seat 12 includes a main structure 12a and a protruding structure 12b, the main structure 12a has a second surface 122, the second connecting portion 124 is arranged on the main structure 12a, the protruding structure 12b is arranged in the middle of the main structure 12a, the top surface of the protruding structure 12b is the first surface 120, and the outer peripheral surface of the protruding structure 12b is the seat surface 121, so that the first connecting portion 123 can be arranged on the top surface of the protruding structure 12b, so that when the second connecting portion 124 is connected to the cylindrical connecting structure 20, the first connecting portion 123 can be closer to the internal space of the water heater, so that the slow-release structure 10 can extend into the cylindrical connecting structure 20 less, so that more structures of the slow-release structure 10 can enter the internal space of the water heater, so that the slow-release structure 10 can more efficiently realize the slow-release of the contained slow-release agent into the water in the water heater.

[0058] Furthermore, especially when the first connection portion 123 includes a recessed structure such as a screw hole structure or a slot as described in the aforementioned embodiment, the protruding structure 12b can also provide a larger space for the first connection portion 123 to be set.

[0059] At this time, when the seal 11 is a structure adapted to the shape of the first surface 120, the seat surface 121 and the second surface 122 as described in the above-mentioned embodiments, specifically, the first sealing portion 111 of the seal 11 can be formed as an annular sheet structure corresponding to the top end surface of the protruding structure 12b and surrounding the outer periphery of the first connecting portion 123, the middle portion 112 can be formed as a cylindrical structure sleeved on the outer peripheral surface of the protruding structure 12b, and the second surface 122 can be formed as an annular sheet structure corresponding to the second surface 122 and surrounding the protruding structure 12b.

[0060] like Figure 5 and Figure 6 As shown, in another embodiment, the first surface 120 , the seat surface 121 and the second surface 122 are all flush, so that the structural shape of the fixing seat 12 is simpler.

[0061] At this time, when the seal 11 is a structure adapted to the shape of the first surface 120, the seat surface 121 and the second surface 122 as described in the above embodiments, specifically, the seal 11 is formed as a whole as an annular sheet structure surrounding the first connecting portion 123, and the structural shape of the seal 11 is also simpler.

[0062] In one embodiment, the second connection portion 124 and the cylindrical connection structure 20 may both include a threaded structure, so that the second connection portion 124 and the cylindrical connection structure 20 can be detachably threaded together, or the second connection portion 124 and the cylindrical connection structure 20 can be detachably snap-connected or interference-fitted.

[0063] Furthermore, the second connection portion 124 may be connected to the outer circumference or inner wall of the cylindrical connection structure 20 .

[0064] Please refer again Figure 4 and Figure 5In one embodiment, the second connection portion 124 is connected to the outer periphery of the cylindrical connection structure 20. At this time, a receiving groove 12c is provided on one side of the fixing seat 12, the second surface 122 is located at the bottom of the receiving groove 12c, and the first connection portion 123 is located at the groove side wall of the receiving groove 12c. The first connection portion 123 is used to be detachably connected to the outer periphery of the cylindrical connection structure 20, so that the operator can disassemble and assemble the fixing seat 12 by grasping the entire outer periphery of the fixing seat 12. The surface area of ​​the fixing seat 12 that can be grasped is large, which is convenient for the operator to perform disassembly and assembly operations. It can be understood that at this time, the cylindrical connection structure 20 can at least partially extend from the inside of the water heater to the outside, so that at least part of the outer periphery of the cylindrical connection structure 20 is located outside the water heater for connection with the fixing seat 12.

[0065] like Figure 4 As shown, in one embodiment, as described in the above embodiments, the fixing seat 12 includes a main structure 12a and a protruding structure 12b. In this case, the protruding structure 12b is protruded from the bottom of the receiving groove 12c, or as Figure 5 As shown, in another embodiment, as described in the above embodiment, the first surface 120, the seat surface 121 and the second surface 122 are all flush. At this time, the first surface 120, the seat surface 121 and the second surface 122 are all located at the bottom of the accommodating groove 12c.

[0066] Please refer again Figure 6 In another embodiment, the second connection portion 124 is connected to the inner wall of the cylindrical connection structure 20. At this time, the second surface 122 is located on one end surface of the fixing seat 12, and the first connection portion 123 is located on the outer periphery of the fixing seat 12. The first connection portion 123 is used to be detachably connected to the inner wall surface of the cylindrical connection structure 20, so that regardless of whether the cylindrical connection structure 20 extends from the inside of the water heater to the outside, the fixing seat 12 can extend into the inside of the cylindrical connection structure 20 to be detachably connected to the inner wall surface of the cylindrical connection structure 20. Therefore, it is possible to further reduce the portion of the cylindrical connection structure 20 extending from the inside of the water heater to the outside. On the one hand, it can make the structure of the water heater including the slow-release structure 10 more compact. On the other hand, it can also reduce the structural volume of the fixing seat 12 and the cylindrical connection structure 20 protruding toward the outside of the water heater, thereby reducing the possibility of damage caused by impact to the fixing seat 12 and the cylindrical connection structure 20 during transportation, use, etc.

[0067] At this time, preferably, the inner wall of the cylindrical connecting structure 20 may be provided with a convex ring 20a, and the second sealing portion 113 is used to be clamped between the second surface 122 and the convex ring 20a, so that by setting the convex ring 20a, the effective contact area of ​​the second sealing portion 113 abutting against the cylindrical connecting structure 20 is larger, thereby improving the connection sealing performance between the fixed seat 12 and the cylindrical connecting structure 20.

[0068] In one embodiment, as described in the aforementioned embodiment, the fixing seat 12 includes a main structure 12a and a protruding structure 12b. In this case, the second surface 122 is located on one end surface of the main structure 12a, and the first connecting portion 123 is located on the outer periphery of the main structure 12a. Alternatively, in another embodiment, as described in the aforementioned embodiment, the first surface 120, the seat surface 121 and the second surface 122 are all flush. In this case, the first surface 120, the seat surface 121 and the second surface 122 are all located on one end surface of the fixing seat 12.

[0069] When the second connection part 124 and the cylindrical connection structure 20 both include a threaded structure as described in the above embodiments, it can be understood that the second connection part 124 is screwed onto the cylindrical connection structure 20 to achieve the disassembly of the second connection part 124 from the cylindrical connection structure 20. At this time, in one embodiment, a screwing part 12d may be provided on the side of the fixed seat 12 away from the slow-release structure 10, and the screwing part 12d may include a multi-prism-shaped protrusion, or may be provided with a groove with a polygonal cross section, and the screwing part 12d is used to cooperate with a screwing tool, so that the operator can screw the screwing part 12d through the screwing tool, thereby screwing the fixed seat 12 as a whole onto the cylindrical connection structure 20. Among them, when the screwing part 12d includes a multi-prism shape, the screwing tool may include an outer polygonal wrench, and when the screwing part 12d is provided with a groove with a polygonal cross section, the screwing tool may include an inner polygonal wrench.

[0070] Please combine Figure 3 and Figure 7 As shown, the slow-release structure 10 may be a thin-walled structure or a mesh structure whose internal space is connected to the external space, so that the slow-release agent can be contained in the internal space and the slow-release agent can be slowly released into the water in the water heater, wherein the slow-release structure 10 specifically includes but is not limited to a tubular thin-walled structure, a box-shaped thin-walled structure, and a columnar mesh structure. Next, the specific structure of the slow-release structure 10 will be introduced by taking the slow-release structure 10 including a tubular thin-walled structure as an example.

[0071] Exemplarily, the slow-release structure 10 includes a tube body 100, which can specifically be a tubular thin-walled structure. The internal space of the tube body 100 is used to accommodate the slow-release agent. The outer periphery of the tube body 100 is provided with a plurality of through holes 100a connected to the internal space of the tube body 100. Since the tube body 100 can have a longer length along its own length direction, the slow-release structure 10 includes the tube body 100, so that the length of the slow-release structure 10 extending into the water heater can be longer, which is beneficial for the hot water in the water heater to fully contact the slow-release agent in the slow-release structure 10 through the through holes 100a, and the slow-release effect and uniformity of the slow-release agent are both good.

[0072] In one embodiment, the tube body 100 may include a first tube portion 1001, an intermediate tube portion 1002 and a second tube portion 1003 which are connected in sequence. The interiors of the first tube portion 1001, the intermediate tube portion 1002 and the second tube portion 1003 are all connected, and only through holes 100a are provided on the outer peripheries of the first tube portion 1001 and the second tube portion 1003. Therefore, when the tube body 100 is in a non-horizontal state in use, for example, when the first tube portion 1001 is located at the lower side of the second tube portion 1003 along the gravity direction, the hot water in the water heater and the intermediate tube portion 1002 without the through holes 100a can be used to form a chimney effect, so that the hotter water in the tube body 100 flows upward along the gravity direction at a faster rate, thereby enhancing the exchange rate of water between the inside and outside of the tube body 100, and enabling the sustained release effect and sustained release uniformity of the sustained release agent in the tube body 100 to be better.

[0073] Preferably, the total opening area of ​​the through holes 100a provided in the first tube portion 1001 is equal to the total opening area of ​​the through holes 100a provided in the second tube portion 1003, thereby facilitating that the inflow speed of water outside the tube body 100 from the through holes 100a provided in the first tube portion 1001 or the second tube portion 1003 is roughly equal to the outflow speed of water inside the tube body 100 from the through holes 100a provided in the second tube portion 1003 or the first tube portion 1001, so as to achieve a more efficient and balanced convection state.

[0074] More preferably, the through hole 100a provided in the first tube portion 1001 is symmetrical with the through hole 100a provided in the second tube portion 1003, so that the through hole 100a provided in the first tube portion 1001 and the through hole 100a provided in the second tube portion 1003 can be punched out respectively by using the same stamping die from two opposite sides of the thin plate used to form the tube body 100, and then the thin plate is rolled into a tube to manufacture the tube body 100. On the one hand, the same set of stamping dies can be used to punch out the through hole 100a in the first tube portion 1001 and the through hole 100a provided in the second tube portion 1003 respectively, so as to save the manufacturing cost of the mold. On the other hand, the mold can be only suitable for stamping a local area of ​​the thin plate, and the volume of the mold can be smaller, so as to save the use space of the mold and further reduce the manufacturing cost of the mold.

[0075] In order to facilitate the passage of water through the through hole 100a while preventing the sustained-release agent from easily passing through the through hole 100a, the aperture of the through hole 100a cannot be too small or too large. Based on this, in one embodiment, the aperture of the through hole 100a can be approximately 2.0 mm. For example, the aperture of the through hole 100a can be 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm or 2.5 mm, etc.

[0076] Along the direction surrounding the central axis of the tube body 100, the spacing between any two adjacent through holes 100a is d1, and along the extending direction of the central axis of the tube body 100, the spacing between any two adjacent through holes 100a is d2. In order to increase the flow path of water convection between the inside and outside of the tube body 100, and at the same time reduce the mutual influence between water flowing into and out of the tube body 100 from different positions along the extending direction of the central axis of the tube body 100, thereby increasing the convection speed, the spacing d1 and the spacing d2 can satisfy: d1<d2.

[0077] Furthermore, in order to make the total opening area of ​​the through holes 100a larger so as to increase the flow path of water convection between the inside and outside of the tube body 100, the spacing between the through holes 100a can be smaller. However, in order to make the structural strength of the tube body 100 meet the use requirements, the spacing between the through holes 100a cannot be too small. Based on this, exemplarily, the spacing d1 can be approximately 6mm, for example, the spacing d1 can be: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm or 9mm, etc., and the spacing d2 can be approximately 18mm, for example, the spacing d1 can be: 15mm, 16mm, 17mm, 18mm, 19mm, 20mm or 21mm, etc.

[0078] In one embodiment, the slow-release structure 10 may further include a first blocking cap 101 and a connecting piece 102. The first blocking cap 101 blocks one end of the tube body 100. The connecting piece 102 is disposed on the first blocking cap 101. The connecting piece 102 is detachably connected to the first connecting portion 123. Thus, on the one hand, the first blocking cap 101 can be used to prevent water in the tube body 100 from directly flowing out from the tube body 100 toward one end of the fixing seat 12 and contacting the first connecting portion 123, so as to prevent the first connecting portion 123 from being easily corroded. On the other hand, the connecting piece 102 is directly disposed on the first blocking cap 101, so that the operator can drive the first blocking cap 101 and the connecting piece 102 by operating the tube body 100 to detach the connecting piece 102 from the first connecting portion 123. Since the grippable area of ​​the tube body 100 is large, such a configuration can make the operation more convenient for the operator, so as to facilitate the disassembly, assembly and replacement of the tube body 100, the first blocking cap 101 and the connecting piece 102 as a whole.

[0079] When the pipe body 100 includes the first pipe portion 1001 , the middle pipe portion 1002 and the second pipe portion 1003 connected in sequence as described in the above embodiments, the first blocking cap 101 can block one end of the first pipe portion 1001 away from the middle pipe portion 1002 .

[0080] It can be understood that one of the first connecting portion 123 and the connecting member 102 may include a stud or screw structure, and the other may include a screw hole structure; or one of the first connecting portion 123 and the connecting member 102 may include a protrusion, and the other may include a groove.

[0081] Preferably, the connecting piece 102 can be welded to the first blocking cap 101, so that the connection tightness between the connecting piece 102 and the first blocking cap 101 is better. In other words, the sealing between the connecting piece 102 and the first blocking cap 101 is better, thereby preventing water in the water heater from entering the gap between the connecting piece 102 and the first blocking cap 101 and contacting the fixing seat 12 along the connecting piece 102.

[0082] In order to make the connecting member 102 have good corrosion resistance, the connecting member 102 can be made of stainless steel.

[0083] In one embodiment, the tube body 100 can be welded to the first blocking cap 101, so that on the one hand, the connection sealing performance between the tube body 100 and the first blocking cap 101 can be better, and on the other hand, the connection stability between the tube body 100 and the first blocking cap 101 can be better. When in use, the relative position stability and posture stability of the tube body 100 and the first blocking cap 101 are better, which makes it easier for the operator to drive the first blocking cap 101 and the connector 102 to move by operating the tube body 100, so as to facilitate the operator to disconnect the connector 102 from the first connecting portion 123.

[0084] In one embodiment, the sustained-release structure 10 further includes a second blocking cap 103 , which blocks an end of the tube body 100 away from the first blocking cap 101 , thereby preventing the sustained-release agent in the tube body 100 from leaking from the end of the tube body 100 away from the first blocking cap 101 .

[0085] Preferably, the second blocking cap 103 is connected to the end of the tube body 100 away from the first blocking cap 101 by interference sealing, so that the connection process of the second blocking cap 103 to the tube body 100 is simple and fast, which is conducive to easy manufacturing of the slow-release structure 10, and the connection between the second blocking cap 103 and the tube body 100 has good sealing performance.

[0086] like Figure 8 and Fig. 9As shown, some water heaters may also be provided with a magnesium rod assembly 104, so that the magnesium in the magnesium rod assembly 104 is corroded first during use, thereby reducing the corrosion rate of the inner surface of the water heater and protecting the inner surface of the water heater. At this time, in one embodiment, the slow-release structure 10 also includes a magnesium rod assembly 104, and the magnesium rod assembly 104 is welded or detachably connected to the second plugging cap 103 and / or the first plugging cap 101, so that the magnesium rod assembly 104 can be integrated into the slow-release structure 10, so as to make the functional diversity of the slow-release structure 10 better, and at the same time, the magnesium rod assembly 104 can be arranged more compactly.

[0087] Specifically, the magnesium rod assembly 104 can be installed on the second blocking cap 103 and at least partially arranged on the side of the second blocking cap 103 away from the first blocking cap 101, so that the tube body 100 does not need to accommodate the magnesium rod assembly 104, so that the tube body 100 can be made more compact, or, the magnesium rod assembly 104 can be arranged in the internal space of the tube body 100, and the magnesium rod assembly 104 is installed on the second blocking cap 103 and / or the first blocking cap 101, so that the internal space of the tube body 100 is used to accommodate the magnesium rod assembly 104, so that the structure of the slow-release device 1 is more compact.

[0088] In one embodiment, the magnesium rod assembly 104 may include a connecting core 1040 and a magnesium rod body 1041, the magnesium rod body 1041 is at least arranged on the outer periphery of the connecting core 1040, the connecting core 1040 may have a first end 1040a, the first end 1040a extends from the interior of the magnesium rod body 1041, and the first end 1040a is connected to the second plugging cap 103 and / or the first plugging cap 101 by welding or by a detachable connection method including but not limited to threaded connection and clamping, so as to connect the magnesium rod body 1041 to the tube body 100.

[0089] like Figures 8 to 10 As shown, when the magnesium rod assembly 104 is at least partially disposed on a side of the second blocking cap 103 away from the first blocking cap 101, illustratively, the magnesium rod body 1041 may be located on a side of the second blocking cap 103 away from the fixing seat 12, and the first end 1040a is connected to the second blocking cap 103, wherein, as Fig. 9 As shown, Fig. 9 FIG. 1 shows an exemplary structure in which the first end 1040a is welded to the second plugging cap 103. Fig.10 As shown, Fig.10 FIG. 4 exemplarily shows a structure in which the first end 1040 a is threadedly connected to the second blocking cap 103 .

[0090] like Fig.11As shown, when the magnesium rod assembly 104 is disposed in the internal space of the tube body 100, exemplarily, the magnesium rod body 1041 is located in the internal space of the tube body 100, and the first end 1040a can be connected to the second blocking cap 103 or the first blocking cap 101 to limit the position of the magnesium rod body 1041 in the tube body 100.

[0091] Furthermore, the magnesium rod body 1041 may have a second end 1041 a away from the first end 1040 a , and the second end 1041 a abuts against the second blocking cap 103 , thereby further limiting the position of the magnesium rod body 1041 in the tube body 100 .

[0092] Combination Fig.12 As shown, in one embodiment, the first end 1040a can be connected to the first blocking cap 101 and the connecting member 102. At this time, preferably, the connecting member 102 and the connecting core 1040 can be formed as one body. For example, the connecting member 102 and the connecting core 1040 can be fixedly connected as one body by welding, or can be fastened together by fasteners, or can be fixedly connected together by fasteners and welding at the same time. Alternatively, the connecting member 102 and the connecting core 1040 can be integrally formed. At this time, the end of the connecting member 102 away from the magnesium rod body 1041 is formed as the first end 1040a of the connecting core 1040, thereby reducing the number of components included in the slow-release structure 10, simplifying the structure of the slow-release structure 10, and reducing the assembly steps of the slow-release structure 10.

[0093] like Fig.13 As shown, this embodiment also provides a water heater, including: an inner tank 2 and a slow-release device 1 as described in any of the above embodiments. Figure 4 As shown, the inner tank 2 is provided with a cylindrical connecting structure 20, and the two opposite ends of the cylindrical connecting structure 20 are respectively connected to the interior of the inner tank 2 and the exterior of the inner tank 2, and the second connecting portion 124 of the slow-release device 1 is detachably connected to the cylindrical connecting structure 20, and the sealing member 11 is partially clamped between the inner mounting surface and the cylindrical connecting structure 20. Since the fixing seat 12 of the slow-release device 1 as described in the aforementioned embodiment 1 is not prone to corrosion during long-term use, the overall service life of the water heater is longer.

[0094] In one embodiment, the cylindrical connecting structure 20 at least partially extends from the inside of the water heater to the outside, and / or, please combine Figure 6As shown, the inner wall of the cylindrical connection structure 20 is provided with a convex ring 20a, the first connection portion 123 is detachably connected to the inner wall surface of the cylindrical connection structure 20, and the second sealing portion 113 is used to be sandwiched between the second surface 122 and the convex ring 20a. The beneficial effects of the cylindrical connection structure 20 at least partially extending from the inside of the water heater to the outside and the convex ring 20a being provided on the inner wall of the cylindrical connection structure 20 can be referred to the description of the above-mentioned embodiment, and will not be repeated here.

[0095] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features 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.

[0096] The specific contents of the above specific implementations only express several implementations of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A sustained-release device, characterized in that: include: A fixing seat (12), the fixing seat (12) comprising a first connecting portion (123) and a second connecting portion (124), the second connecting portion (124) being cylindrical and spaced apart from the outer periphery of the first connecting portion (123), the second connecting portion (124) being used for being detachably connected to the cylindrical connecting structure (20) of the water heater, and the surface of the fixing seat (12) located between the first connecting portion (123) and the second connecting portion (124) forming an inner mounting surface; a sustained-release structure (10), the sustained-release structure (10) being used to contain a sustained-release agent, the sustained-release structure (10) being detachably connected to the first connecting portion (123); and A sealing member (11), wherein the sealing member (11) is covered on the inner mounting surface, and a portion of the sealing member (11) is sandwiched between the inner mounting surface and the slow-release structure (10), and another portion of the sealing member (11) is used to be sandwiched between the inner mounting surface and the tubular connecting structure (20).

2. The sustained-release device according to claim 1, characterized in that: The inner mounting surface comprises a first surface (120), a seat surface (121) and a second surface (122) which are connected in sequence, the first surface (120) is provided with the first connecting portion (123), the seat surface (121) surrounds the first surface (120), the second surface (122) surrounds the seat surface (121), and the second connecting portion (124) is arranged around the outer periphery of the second surface (122); The sealing member (11) comprises a first sealing portion (111), a middle portion (112) and a second sealing portion (113) which are connected in sequence, wherein the first sealing portion (111) is sandwiched between the first surface (120) and the sustained-release structure (10), the middle portion (112) surrounds the outer circumference of the first sealing portion (111), and the middle portion (112) covers the seat surface (121), the second sealing portion (113) surrounds the outer circumference of the middle portion (112), and the second sealing portion (113) is used to be sandwiched between the second surface (122) and the tubular connecting structure (20).

3. The sustained-release device according to claim 2, characterized in that: The fixing seat (12) comprises a main body structure (12a) and a protruding structure (12b), the main body structure (12a) has the second surface (122), the second connecting portion (124) is arranged on the main body structure (12a), the protruding structure (12b) is arranged in the middle of the main body structure (12a), the top end surface of the protruding structure (12b) is the first surface (120), and the outer peripheral surface of the protruding structure (12b) is the seat body surface (121); or, The first surface (120), the seat surface (121) and the second surface (122) are all flush with each other.

4. The sustained-release device according to claim 2 or 3, characterized in that: A receiving groove (12c) is provided on one side of the fixing seat (12), the second surface (122) is located at the bottom of the receiving groove (12c), the first connecting portion (123) is located at the side wall of the receiving groove (12c), and the first connecting portion (123) is used to be detachably connected to the outer periphery of the cylindrical connecting structure (20); or, The second surface (122) is located on an end surface of the fixing seat (12), the first connecting portion (123) is located on the outer periphery of the fixing seat (12), and the first connecting portion (123) is used for being detachably connected to the inner wall surface of the tubular connecting structure (20).

5. The sustained-release device according to any one of claims 1 to 3, characterized in that: The sustained-release structure (10) comprises a tube body (100), a first blocking cap (101) and a connecting piece (102); the internal space of the tube body (100) is used to accommodate the sustained-release agent; the outer periphery of the tube body (100) is provided with a plurality of through holes (100a) connected to the internal space of the tube body (100); the first blocking cap (101) blocks one end of the tube body (100); the connecting piece (102) is provided on the first blocking cap (101); and the connecting piece (102) is detachably connected to the first connecting portion (123).

6. The sustained-release device according to claim 5, characterized in that: The slow-release structure (10) further comprises a second blocking cap (103), wherein the second blocking cap (103) is connected to an end of the tube body (100) away from the first blocking cap (101) by interference sealing.

7. The sustained-release device according to claim 6, characterized in that: The sustained-release structure (10) further comprises a magnesium rod assembly (104); The magnesium rod assembly (104) is arranged in the internal space of the tube body (100), and the magnesium rod assembly (104) is installed on the second blocking cap (103) and / or the first blocking cap (101), or the magnesium rod assembly (104) is installed on the second blocking cap (103) and is at least partially arranged on a side of the second blocking cap (103) away from the first blocking cap (101).

8. The sustained-release device according to claim 5, characterized in that: The tube body (100) comprises a first tube portion (1001), an intermediate tube portion (1002) and a second tube portion (1003) which are connected in sequence; the first blocking cap (101) blocks an end of the first tube portion (1001) away from the intermediate tube portion (1002); the interiors of the first tube portion (1001), the intermediate tube portion (1002) and the second tube portion (1003) are all connected; and the through hole (100a) is provided only on the outer periphery of the first tube portion (1001) and the second tube portion (1003).

9. The sustained-release device according to claim 8, characterized in that: The through hole (100a) provided in the first tube portion (1001) and the through hole (100a) provided in the second tube portion (1003) are symmetrical.

10. A water heater, characterized in that: include: An inner liner (2) and a sustained-release device (1) as described in any one of claims 1 to 9, wherein the inner liner (2) is provided with the cylindrical connecting structure (20), and the two opposite ends of the cylindrical connecting structure (20) are respectively connected to the interior of the inner liner (2) and the exterior of the inner liner (2), the second connecting portion (124) of the sustained-release device (1) is detachably connected to the cylindrical connecting structure (20), and the sealing member (11) is partially sandwiched between the inner mounting surface and the cylindrical connecting structure (20).

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