Double inner container fixing structure and electric water heater

Abstract

A double inner container fixing structure, comprising a snap ring sleeved on the inner container and a connecting frame connected with the snap ring, the snap ring comprising a locking portion, the two ends of the connecting frame abutting against the locking portion respectively, and a fastener being arranged at the two ends of the connecting frame, the fastener extending from the connecting frame and penetrating through the locking portion to lock the snap ring. The technical scheme provided by the utility model has the advantages of simple structure, small number of parts, high compatibility with the hanger, low material cost, high stability and simple and fast assembly compared with the prior art.

Description

Technical Field

[0001] This utility model relates to the field of double inner tank fixing structure, and in particular to a double inner tank fixing structure and an electric water heater. Background Technology

[0002] Currently, the fixed structure used in "dual inner tank" electric water heaters on the market suffers from problems such as poor stability, numerous parts, low compatibility with the mounting bracket, cumbersome structure, complicated assembly steps, and high material and transportation costs. For example, the "dual inner tank" fixed structure described in Chinese utility model patents with authorization announcement numbers CN216744894U, CN212205046U, and CN218033708U widely suffers from insufficient stability or a large number of parts.

[0003] Therefore, many manufacturers are trying to develop new "double inner liner" fixing structures to solve the various problems that exist.

[0004] For example, Chinese invention application CN105627565A, entitled "Fixing Structure of Inner Tank of Double-Tank Water Heater," discloses a structure comprising two adjacent parallel inner tanks and a clamp surrounding the outer periphery of the two inner tanks. The clamp comprises two opposing left and right clamp bodies connected at their ends. Each clamp body has a shape that mates with the outer wall of the inner tank, at least in the non-adjacent portions. A gap is provided between the side walls of the two inner tanks. The left and right clamp bodies each have through holes that mate with the gap. The left and right clamp bodies are connected by long bolts passing through the through holes and the gap. The left and right clamp bodies are recessed towards the gap to form a groove. The two ends of the groove are upper and lower clamping portions that mate with the shape of the outer wall of the inner tank. A through hole that mates with the gap is provided in the middle of the bottom of the groove. The bottoms of the two grooves are spaced apart. The two inner tanks have the same diameter, and the bottom of the groove is parallel to the line connecting the centers of the two inner tanks. The diameter of the long bolt is equal to the distance between the side walls of the two inner tanks. The inner tank fixing structure of the dual-tank water heater also includes a support frame. The support frame is installed perpendicular to the inner tank axis on the left or right clamping body. The upper end of the support frame has a hook. The support frame is connected to the upper and lower clamping parts of the left or right clamping body, respectively. Each clamping part has a connecting edge parallel to the bottom of the groove, and the connecting edge has a fixing hole. The support frame has a connecting hole that mates with the fixing hole, and the fixing hole and the connecting hole are connected by bolts. In this invention application, the support frame installed on the clamping part is not connected to the connection points of the left and right clamping bodies, inevitably increasing the number of fasteners used in the inner tank fixing structure. Furthermore, the left and right clamping bodies are connected by long bolts passing through through holes and gaps, which also increases material costs and the number of parts.

[0005] For example, Chinese utility model patent CN210569166U, entitled "Suspension Device for Inner Tank of Wall-Mounted Electric Water Heater with Double Inner Tank Structure," discloses: an inner tank mounting plate (1) and two metal strips (2) welded to both ends of the inner tank mounting plate (1). The ends of the two metal strips (2) away from the inner tank mounting plate (1) abut each other and are provided with positioning holes (5). The center points of the two positioning holes (5) coincide. The side wall of the inner tank mounting plate (1) is provided with flanged holes (4), and the side wall of the inner tank mounting plate (1) is provided with a locking device for fastening the metal strips (2). The locking device includes a screw (6), which passes through the two coincident positioning holes (5) and is threadedly connected to the flanged holes (4). The screw (6) is a large flat-head half-threaded screw. The locking device includes a central component (7) and a screw (6). The screw (6) passes through two overlapping positioning holes (5) and the central component (7) and is threadedly connected to the flanged hole (4). The screw (6) is a semi-bare thread screw with a large flat head. The upper and lower ends of the central component (7) are abutted by extension members (8). Two mounting holes (9) are opened at the ends of the two extension members (8) near the central component (7). The inner bottom of each mounting hole (9) is welded with a extension spring (10) together with the side wall of the central component (7). Two symmetrically arranged slide rods (11) are welded at the ends of each extension member (8) near the central component (7). The side wall of each slide rod (11) is provided with a limiting groove (16). The interior of the central component (7) is provided with multiple limiting devices corresponding to the multiple slide rods (11). The technical solution described in this utility model uses a long screw (6) that passes through two overlapping positioning holes (5) and is threadedly connected to the flange hole (4), which results in high material costs; moreover, the locking device has a cumbersome and complex structure with a large number of parts.

[0006] For example, Chinese utility model patent CN215571212U, entitled "An Inner Tank Assembly and an Electric Water Heater," discloses: a non-metallic inner tank (1), two of which are arranged side by side; at least two clamps (2), each clamp (2) being fastened to the outside of the two non-metallic inner tanks (1), and a support beam being provided in the middle of each clamp (2), the support beam being arranged between the two non-metallic inner tanks (1) to support the non-metallic inner tanks (1). The support beam includes two support frames (21) fixedly connected to the body of the clamp (2) and symmetrically arranged, each support frame (21) being supported on the tank wall of one of the non-metallic inner tanks (1). The support frame (21) includes an arc-shaped plate (211) and connecting plates (212) connected to both ends of the arc-shaped plate (211). The arc-shaped plate (211) is in close contact with the wall of the non-metallic inner liner (1), and the connecting plates (212) are fixedly connected to the main body. Alternatively, the two ends of the support beam are fixedly connected to the main body of the clamp (2), and arc-shaped grooves are symmetrically opened between the two ends of the support beam, with the wall of the non-metallic inner liner (1) fitting into the arc-shaped grooves. The technical solution of this utility model has low compatibility with the hanging bracket.

[0007] Finally, the Chinese utility model patent with authorization announcement number CN214701227U, entitled "A Double Inner Tank Fixing Structure and a Double Inner Tank Water Heater," discloses: It includes an outer hoop, comprising two opposing outer ring arc segments (211) and two opposing outer ring straight segments (212), wherein the outer ring arc segments (211) and the outer ring straight segments (212) are alternately arranged and connected, and the outer hoop has a break, the two ends of which are detachably connected. Two inner hoops (22) are disposed inside the outer hoop. Each inner hoop (22) includes an inner arc segment (221) and inner straight segments (222) extending from both ends of the inner arc segment (221). The inner straight segments (222) are connected to the corresponding outer straight segments (212). The two inner arc segments (221) cooperate with the two outer arc segments (211) to form an inner liner mounting ring. The two ends of the break are respectively connected to lugs, which are detachably connected by bolts and nuts. The inner straight segments (222) are slidably connected to the corresponding outer straight segments (212). The technical solution of this utility model has a complex structure and cumbersome assembly steps. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a double-tank fixing structure and electric water heater that is simple in structure, has few parts, high compatibility with the bracket, low material cost, high stability, and is easy and quick to assemble.

[0009] The main technical solution adopted by this utility model is as follows:

[0010] A double inner liner fixing structure includes a retaining ring fitted on the inner liner and a connecting frame connected to the retaining ring. The retaining ring includes a locking part. Both ends of the connecting frame abut against the locking part. Fasteners are also installed at both ends of the connecting frame. The fasteners extend from the connecting frame and pass through the locking part to lock the retaining ring.

[0011] The connecting frame as a whole includes one of the following structures: “︺”, “﹀”, or “︶”.

[0012] The cross-section of the connecting frame is one of the following shapes: "U", "︹" or "∩". Both ends of the connecting frame have baffles with through holes.

[0013] The connecting frame also has an installation port on its top wall, which is located near both ends of the connecting frame.

[0014] A heat-insulating sealing gasket is installed at the mounting port.

[0015] The connecting frame is also equipped with a mounting base, and the heat-insulating sealing gasket is installed on the mounting base through the mounting port.

[0016] The heat insulation sealing gasket includes either a mounting buckle or a mounting groove, and the mounting base includes either the mounting buckle or the mounting groove, wherein the mounting buckle is pressed into the mounting groove.

[0017] The mounting base further includes a limiting groove, and one end of the fastener is located in the limiting groove.

[0018] The locking part includes a locking piece disposed opposite to the locking piece, the locking piece having a locking hole, and the fastener passing through the locking hole to lock the retaining ring.

[0019] An electric water heater includes two inner tanks arranged side by side, using the aforementioned double inner tank fixing structure.

[0020] According to the technical solution described in this utility model, the following beneficial effects are achieved: the two ends of the connecting frame abut against the locking part and are locked by retaining rings through fasteners provided at both ends of the connecting frame, saving the number of fasteners used. That is, the fasteners used to install the connecting frame can be replaced by fasteners with locking retaining rings, reducing material costs; the overall structural features of the connecting frame make it more adaptable to the space between the "double inner liner", the component layout is more reasonable, and the space utilization rate is high; the connecting frame has an installation port to facilitate cooperation with the heat insulation sealing gasket, providing conditions for the subsequent connection of the heat insulation sealing gasket and the mounting base, so as to facilitate subsequent cooperation with the hanger; the mounting base is provided with a limiting groove to limit one end of the fastener, so that when the retaining ring is locked and screwed in later, the screwing action can be smoothly completed by limiting the fastener, making the operation more convenient and faster. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the double inner liner fixing structure.

[0022] Figure 2 for Figure 1 A partial structural breakdown diagram, showing the retaining ring structure.

[0023] Figure 3 for Figure 2 Enlarged view of section A.

[0024] Figure 4 for Figure 2 An enlarged view of part A in another embodiment.

[0025] Figure 5 for Figure 1 The exploded view of the structure shows the fastener engaging with the locking part and being limited by the mounting base.

[0026] Figure 6 This is a schematic diagram showing the positional relationship between the connecting bracket, fasteners, and mounting base.

[0027] Figure 7 This is a schematic diagram of the connecting frame structure.

[0028] Figure 8 This is a schematic diagram of the mounting base structure.

[0029] 1. Snap ring, 11. Locking part, 111. Locking piece, 1110. Locking hole, 2. Connecting bracket, 20. Mounting port, 21. Baffle, 210. Through hole, 3. Fastener, 4. Heat insulation sealing gasket, 5. Mounting base, 50. Limiting groove. Detailed Implementation

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0031] See Figure 1-7As shown, a double-inner-tank fixing structure includes a retaining ring 1 fitted onto the inner tank and a connecting frame 2 connected to the retaining ring 1. The retaining ring 1 includes a locking part 11. The two ends of the connecting frame 2 respectively abut against the locking part 11. Fasteners 3 are also installed at both ends of the connecting frame 2. The fasteners 3 extend from the connecting frame 2 and pass through the locking part 11 to lock the retaining ring 1. In this application, the electric water heater adopts a non-metallic "double inner tank" arranged side by side. The retaining rings are respectively fitted onto the outer wall surface near the ends of the two inner tanks. The retaining ring fitted onto each inner tank has a locking part. The two ends of the connecting frame abut against the locking part. (In another embodiment, a single retaining ring can be used to fit the two inner tanks together, forming two locking parts on the retaining ring. The two ends of the connecting frame abut against these two locking parts. Of course, this method is less applicable in specific scenarios to facilitate cooperation with subsequent structures such as hanging brackets). Preferably, the retaining rings 1 are fixedly connected by welding to improve the stability of the fixing structure in fixing the "double inner tank". In this application, the two ends of the connecting frame abut against the locking part and are locked by retaining rings provided at both ends of the connecting frame, which saves the number of fasteners used. That is, the fasteners used to install the connecting frame can be replaced by fasteners with locking retaining rings, thus reducing material costs.

[0032] See Figure 1 , 2 As shown in Figures 5-7, the connecting frame 2 as a whole includes one of the following structures: a "︺" type, a "﹀" type, or a "︶" type. Preferably, the connecting frame 2 as a whole includes a "︺" type structure. More preferably, the connecting frame 2 has an inverted "brim" type structure. This structural design can adapt to the spatial shape between the "double inner liner" to make the component layout more reasonable and the space utilization rate higher, and can also enhance the stability of the connection between the "double inner liner".

[0033] See Figure 6 , 7 As shown, the cross-section of the connecting frame 2 is one of the following shapes: "U", "︹", or "∩". Both ends of the connecting frame 2 have baffles 21 with through holes 210. In this application, this structural design facilitates the insertion of fasteners through the "U", "︹", or "∩" shaped notches, improving operational convenience and making assembly simpler and faster. In this application, both ends of the connecting frame have baffles with through holes, thereby securing one end of the fastener to the baffle and allowing the fastener to protrude through the through hole.

[0034] See Figure 5 , 7 As shown, an installation port 20 is also provided on the top wall of the connecting frame 2, and the installation port 20 is close to both ends of the connecting frame 2. In this application, the installation port is designed to facilitate installation with subsequent thermal insulation sealing gaskets.

[0035] See Figure 1, 2 As shown in Figure 5, a heat-insulating sealing gasket 4 is installed at the mounting port 20. Preferably, the heat-insulating sealing gasket 4 can be interference-sealed at the mounting port 20. Preferably, a heat-insulating sealing gasket 4 can also be inserted into the mounting port 20.

[0036] See Figure 1 , 2 As shown in Figure 5-8, the connecting frame 2 is also equipped with a mounting base 5, and the heat insulation sealing gasket 4 passes through the mounting port 20 and is installed on the mounting base 5.

[0037] See Figure 5 , 8 As shown, the thermal insulation sealing gasket 4 includes either a mounting clip or a mounting groove, and the mounting base 5 includes either a mounting clip or a mounting groove, with the mounting clip pressed into the mounting groove. In this application, the mounting base provides a mounting position for the thermal insulation sealing gasket and facilitates its installation with a hanger or similar structure. Preferably, through holes are provided on the top wall of the thermal insulation sealing gasket 4, the connecting frame 2, and the mounting base 5. The three through holes are correspondingly positioned and interconnected, thus providing a structural foundation for the subsequent installation of hangers or other structures. In another embodiment, the through holes on the mounting base can be replaced with countersunk holes or blind holes to suit different scenarios.

[0038] See Figure 5 , 6 As shown in Figures 8 and 9, the mounting base 5 also includes a limiting groove 50, and one end of the fastener 3 is located within the limiting groove 50. In this application, by using a limiting groove to limit one end of the fastener, it is possible to prevent the fastener from rotating during assembly.

[0039] See Figure 2-4 As shown, the locking part 11 includes locking plates 111 arranged opposite each other. Locking plates 111 have locking holes 1110. Fasteners 3 pass through the locking holes 1110 to lock the retaining ring 1. Preferably, in this application, the fasteners 3 are a bolt and a nut that cooperate with each other. One end of the bolt is engaged with the baffle 21 and limited by the limiting groove 50 on the mounting base 5, facilitating a screw-on operation when locking the retaining ring 1. The other end of the bolt extends out of the connecting bracket 2 and passes through the locking hole 1110 on the locking plate 111, and then screws onto the nut to lock the retaining ring 1. Preferably, the locking hole 1110 on the locking plate 111 can be a through hole or a notch hole open on one side. For example, one locking plate 111 may have a through hole 1110, and the other locking plate 111 may have a notch hole 1110. More preferably, the opening direction of the notch hole is different from the direction of the connecting bracket 2 away from the retaining ring 1, to prevent the notch hole from disengaging from the fastener 3.

[0040] Furthermore, an electric water heater includes two inner tanks arranged side by side, employing the aforementioned double inner tank fixing structure.

[0041] Although the specific embodiments of this utility model have been described above, those skilled in the art can make changes to it without departing from the spirit and principle of this utility model. The scope of protection of this utility model is defined by its claims and their equivalents.

Claims

1. A double inner liner fixing structure, comprising a retaining ring fitted onto the inner liner and a connecting frame connected to the retaining ring, characterized in that: The retaining ring includes a locking part, and the two ends of the connecting frame abut against the locking part. Fasteners are also installed at both ends of the connecting frame, and the fasteners extend from the connecting frame and pass through the locking part to lock the retaining ring.

2. The double inner liner fixing structure according to claim 1, characterized in that: The connecting frame as a whole includes one of the following structures: "︺", "﹀", or "︶".

3. The double inner liner fixing structure according to claim 1 or 2, characterized in that: The cross-section of the connecting frame is one of "U", "︹" or "∩" shape, and each end of the connecting frame has a baffle with a through hole.

4. The double inner liner fixing structure according to claim 3, characterized in that: An installation opening is provided on the top wall of the connecting frame, and the installation opening is located near both ends of the connecting frame.

5. The double inner liner fixing structure according to claim 4, characterized in that: A heat-insulating sealing gasket is installed at the installation port.

6. The double inner liner fixing structure according to claim 5, characterized in that: The connecting frame is also equipped with a mounting base, and the heat-insulating sealing gasket is installed on the mounting base through the mounting port.

7. The double inner liner fixing structure according to claim 6, characterized in that: The heat-insulating sealing gasket includes one of a mounting buckle or a mounting groove, and the mounting base includes the other of the mounting buckle or the mounting groove, wherein the mounting buckle is pressed into the mounting groove.

8. The double inner liner fixing structure according to claim 6 or 7, characterized in that: The mounting base also includes a limiting groove, and one end of the fastener is located in the limiting groove.

9. The double inner liner fixing structure according to claim 1, characterized in that: The locking part includes a locking piece disposed opposite to the locking piece, the locking piece having a locking hole, and the fastener passing through the locking hole to lock the retaining ring.

10. An electric water heater comprising two inner tanks arranged side by side, characterized in that: The double inner liner fixing structure described in any one of claims 1 to 9 is adopted.

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