Main body structure of electric water heater

Abstract

The utility model discloses a main body structure of an electric water heater, which comprises a barrel-shaped barrel shell, an inner container arranged in the barrel shell, a heat preservation layer arranged between the inner container and the barrel shell, and end plates arranged at two ends of the barrel shell, and at least two built-in clamping pieces are arranged on the inner side wall of the barrel shell. The edge of the end plate is provided with an edge abutting against the outer side face of the built-in clamping piece, an external clamping piece located on the inner side of the built-in clamping piece is further arranged on the outer side wall of the end plate, a clamping structure is arranged between the built-in clamping piece and the external clamping piece, and a rotating cover structure is arranged on the end plate. By applying certain acting force to the rotating cover structure, the clamping force of the clamping structure can be overcome to rotate the end cover, so that the internal clamping piece and the external clamping piece are separated and switched to a mutually staggered position, and at the moment, the end plate can be axially taken out to be overhauled conveniently and quickly.

Description

Technical Field

[0001] The utility model relates to a main body structure of an electric water heater. Background Art

[0002] Electric water heaters are widely used because of their convenient installation and relatively constant outlet water temperature. An electric water heater generally includes a cylindrical shell, an inner tank, and an electric heater. The inner tank is arranged in the shell, and the electric heater is arranged in the inner tank to heat the water in the inner tank through the electric heater. Generally, end plates are also arranged at both ends of the shell. For the existing electric water heaters, the end plates at both ends are generally fixed by screws or buckles, which is not convenient for removing the end plates for maintenance. Content of the Utility Model

[0003] In view of this, the purpose of the utility model is to provide a main body structure of an electric water heater which is convenient for disassembling and assembling the end plates.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A main body structure of an electric water heater includes a cylindrical shell, an inner tank arranged inside the shell, a heat insulation layer arranged between the inner tank and the shell, and end plates arranged at both ends of the shell. At least two built-in clamping parts are arranged on the inner side wall of the shell. The edge of the end plate has a border that abuts against the outer side surface of the built-in clamping part. An external clamping part located inside the built-in clamping part is also arranged on the outer side wall of the end plate. A clamping structure is arranged between the built-in clamping part and the external clamping part. A rotary cover structure is arranged on the end plate. When the rotary cover structure is subjected to an external force, it can overcome the resistance of the clamping structure to enable the end plate to rotate relative to the shell.

[0006] In an embodiment of the utility model, the rotary cover structure includes friction lines arranged on the outer side surface of the end plate. The number of the friction lines is two groups, and the two groups of friction lines are symmetrically arranged on the left side part and the right side part of the end plate.

[0007] In an embodiment of the utility model, the clamping structure includes a groove arranged inside the built-in clamping part and a clamping block arranged on the external clamping part and capable of being clamped into the groove.

[0008] In an embodiment of the utility model, the port of the shell is circular, the end plate is a circular plate, the groove is a straight groove and its head end is located on the inner side wall of the shell, and the length direction of the groove is inclined relative to the radius of the shell at the head end.

[0009] In an embodiment of the utility model, the clamping block is in a straight strip shape.

[0010] The beneficial effects of the present utility model are as follows: By applying a certain force to the rotary cover structure, the end cover can be rotated by overcoming the clamping force of the above-mentioned clamping structure, so that the built-in clamping member and the external clamping member are disengaged, and the two are switched to a position where they are offset from each other. At this time, the end plate can be axially removed for maintenance, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural diagram of a cross-section of an electric water heater;

[0012] Figure 2 is an exploded view of the connection structure between the cylindrical shell and the end plate;

[0013] Figure 3 is Figure 2 an enlarged view of part A in

[0014] Figure 4 is a cross-sectional view of the cylindrical shell;

[0015] Figure 5 is Figure 4 an enlarged view of part B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0017] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the descriptions involving "preferred", "sub-preferred", etc. in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "preferred" and "sub-preferred" may explicitly or implicitly include at least one such feature.

[0018] Referring to Figures 1 to 5 , the present utility model provides a main body structure of an electric water heater, including a cylindrical cylindrical shell 2, an inner tank 6 disposed inside the cylindrical shell 2, a heat insulation layer 7 disposed between the inner tank 6 and the cylindrical shell 2, and two end plates 1 disposed at both ends of the cylindrical shell 2. At least two built-in clamping members 3 are disposed on the inner side wall of the cylindrical shell 2. The edge of the end plate 1 has a flange 11 that abuts against the outer side surface of the built-in clamping member 3. An external clamping member 12 located inside the built-in clamping member 3 is further disposed on the outer side wall of the end plate 1. A clamping structure capable of restricting the rotation of the end plate 1 relative to the cylindrical shell 2 is disposed between the built-in clamping member 3 and the external clamping member 12. A rotary cover structure is disposed on the end plate 1. When the rotary cover structure is subjected to an external force, it can overcome the resistance of the clamping structure to rotate the end plate 1 relative to the cylindrical shell 2.

[0019] Generally, a heating wire is arranged in the inner container 6 for heating the water therein. The heat preservation layer 7 is generally made of foamed polyurethane material, and the barrel shell 2 is made of metal material, such as stainless steel, aluminum alloy, etc. A connecting seat 9 is generally fixed on the outer side wall of the inner container 6. A through hole corresponding to the screw hole on the connecting seat 9 is arranged on the barrel shell 2. The connecting seat 9 is used for installing the hanging bracket 8. By passing a bolt through the hanging bracket 8 and the barrel shell 2 and then screwing it with the connecting seat 9, the hanging bracket 8 can be locked. The purpose of the hanging bracket 8 is to install the electric water heater on the wall.

[0020] Preferably, the number of the internal clamping members 3 and the external clamping members 12 is 4 each. The 4 internal clamping members 3 are evenly arranged on the inner side wall of the barrel shell 2, and the external clamping members 12 are evenly arranged on the outer side wall of the end plate 1.

[0021] The method of installing the end plate 1 is to install the end plate 1 at the port of the barrel shell 2, make the edge 11 of the end plate 1 abut against the outer side surface of the internal clamping member 3, and then rotate the end plate 1 to rotate the external clamping member 12 to the inner side of the internal clamping member 3, so that the two are clamped through the clamping structure. After that, the state of the end plate 1 can be kept stable, and the installation of the end plate 1 is completed. The method of removing the end plate 1 is to rotate the end plate 1 to overcome the clamping force of the above clamping structure, so that the external clamping member 12 and the internal clamping member 3 are separated, and the two are switched to a staggered position, and then the end plate 1 can be axially taken out, which is convenient and fast.

[0022] Refer to Figure 2 , in a preferred embodiment of the present invention, the rotary cover structure includes friction lines 4 arranged on the outer surface of the end plate 1. The number of the friction lines 4 is two groups, and the two groups of friction lines 4 are symmetrically arranged on the left side and the right side of the end plate 1. Each group of friction lines 4 includes at least two parallel linear ridges. In this solution, the way for the user to rotate the end plate 1 is: one hand of the user is attached to the first group of friction lines 4, and the other hand is attached to the second group of friction lines 4, and then the two hands simultaneously apply clockwise or counterclockwise frictional force to drive the end plate 1 to rotate, and then the end plate 1 can be removed.

[0023] In some preferred embodiments of the present invention, the above rotary cover structure can also adopt other structural forms, such as including two hand holes. The two hand holes are respectively arranged on the left edge and the right edge of the end plate 1. After the two index fingers of the user are respectively inserted into the hand holes, the two hands simultaneously apply clockwise or counterclockwise thrust to drive the end plate 1 to rotate, and then the end plate 1 can be removed.

[0024] In a preferred embodiment of the present invention, the clamping structure includes a groove 31 arranged inside the internal clamping member 3 and a clamping block 121 arranged on the external clamping member 12 and capable of being clamped into the groove 31.

[0025] Further, the port of the cylindrical shell 2 is circular, the end plate 1 is a circular plate, the groove 31 is a straight groove and its head end is located on the inner side wall of the cylindrical shell 2, and the length direction of the groove 31 is inclined relative to the radius of the cylindrical shell 2 at the position of its head end. The included angle h between the groove 31 and the radius at the position where the head end of the groove 31 is located is an acute angle, and the value of the included angle h can be 10°, 30°, 45°, etc. The clamping block 121 is in a straight strip shape, and is parallel to the groove 31 when the clamping block 121 is inserted into the groove 31. With such a design, the contact area between the clamping block 121 and the groove 31 can be increased, and stress concentration can be reduced.

[0026] In some embodiments of the present invention, the above-mentioned clamping structure can also adopt other structural forms. For example, the above-mentioned groove 31 is arranged on the external clamping member 12, and correspondingly, the above-mentioned clamping block 121 is arranged on the internal clamping member 3.

[0027] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. The main structure of an electric water heater, characterized in that, It includes a cylindrical shell (2), an inner liner (6) arranged inside the shell (2), a heat insulation layer (7) arranged between the inner liner (6) and the shell (2), and end plates (1) arranged at both ends of the shell (2). At least two built-in clamping parts (3) are arranged on the inner side wall of the shell (2). The edge of the end plate (1) has a flange (11) that abuts against the outer side surface of the built-in clamping part (3). An external clamping part (12) located inside the built-in clamping part (3) is also arranged on the outer side wall of the end plate (1). A clamping structure is arranged between the built-in clamping part (3) and the external clamping part (12). A rotary cover structure is arranged on the end plate (1). When the rotary cover structure is subjected to an external force, it can overcome the resistance of the clamping structure to enable the end plate (1) to rotate relative to the shell (2).

2. The main structure of an electric water heater according to claim 1, characterized in that, The rotary cover structure includes friction lines (4) arranged on the outer surface of the end plate (1). The number of the friction lines (4) is two groups. The two groups of friction lines (4) are symmetrically arranged on the left side and the right side of the end plate (1).

3. The main structure of an electric water heater according to claim 1, characterized in that, The clamping structure includes a groove (31) arranged inside the built-in clamping part (3), and a clamping block (121) arranged on the external clamping part (12) and capable of being clamped into the groove (31).

4. The main structure of an electric water heater according to claim 3, characterized in that, The port of the shell (2) is circular. The end plate (1) is a circular plate. The groove (31) is a straight groove and its head end is located on the inner side wall of the shell (2). The length direction of the groove (31) is inclined relative to the radius of the shell (2) at its head end.

5. The main structure of an electric water heater according to claim 4, characterized in that, The clamping block (121) is in a straight strip shape.

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