CN202303911U - Water heater - Google Patents

Abstract

The main purpose of the utility model is to provide a water heater capable of stably fixing the inner tank and preventing it from deflecting in the outer shell. The end cover, wherein the inner tank is composed of a middle barrel and a head matched with the end of the middle barrel, it is characterized in that an inner tank support is provided on the end cover, and the inner tank support is composed of The head support part for supporting the head and the middle barrel holding part for radially holding and positioning the middle barrel are composed.

Description

water heater

technical field

The utility model relates to a water heater.

Background technique

At present, the basic assembly structure of a water storage electric water heater is mainly composed of three parts: an inner tank, an outer shell, and an insulating layer between the inner tank and the outer shell. In the production process, such problems are often encountered, that is, after the liner is put into the shell, the liner is often deflected in the shell due to the uneven expansion of the foam material, that is, it is not centered, resulting in deviation of the water pipe and improper assembly of the decorative cover. , Foaming material overflow and other process and quality problems, thus affecting the performance of the product.

In view of the above problems, the patent with the authorized notification number CN201531997U discloses an electric water heater, at least one of the two end covers is provided with an inner tank supporting part on the side facing the inner tank, and the inner tank supporting part and the end cover are formed on the One body, and an arc matching the arc surface of the end of the inner tank is formed on its top, and the positioning of the bottom of the inner tank is realized by filling the foam material between the supporting part of the inner tank and the end cap. With the above-mentioned structure, the bottom of the end cover of the inner tank is provided with a supporting part that matches the arc surface of the bottom, and the inner tank can only be centered from the side of the end cover of the inner tank, and it is still impossible to prevent the inner tank from occurring in the outer shell during the assembly process. skewed.

Utility model content

In view of this, the main purpose of the present invention is to provide a water heater capable of stably fixing the inner tank and preventing it from being deflected in the outer shell.

In order to achieve the above object, the utility model provides a water heater, which includes an inner tank, an outer shell for accommodating the inner tank, and an end cap for closing the outer shell, wherein the inner tank is connected by a middle barrel and a The head of the end of the barrel is formed, and the feature is that an inner tank support is provided on the end cover, and the inner tank support at least includes a middle barrel holding part for radially holding and positioning the middle barrel.

With the above structure, since the middle barrel holding part is provided on the end cover, the middle barrel can be radially positioned along the circumference of the middle barrel, so as to ensure that the liner stands firm and avoids its deflection in the outer shell.

Preferably, the liner supporting member further includes a head support portion for supporting the head.

With the above structure, since the end cover is provided with a head support portion, the inner tank can be centered through the head support portion, thereby ensuring that the inner tank stands firmly and avoids deflection in the outer shell.

Preferably, a connection part is formed at the connection between the middle barrel and the head, one end of the middle barrel holding part is set on the inner side of the end cap, and the other end is set on the outer periphery of the middle barrel close to the connection part .

With the above structure, since a part of the middle barrel holding part is arranged on the outer periphery of the middle barrel close to the connecting part, a radial holding part is formed on the outer periphery of the middle barrel to limit its inclination, and the centering can be better realized The barrel is positioned radially.

Preferably, a first annular support for radially maintaining and positioning the middle barrel is provided on the end cover and separated from it, and a first annular support is provided between the first annular support and the end cover to reduce the weight of the inner tank. A cushion layer acting on the circumferential direction of the first annular support.

With the above-mentioned structure, the middle barrel is radially positioned by the first annular bracket, so as to ensure that the liner stands firm and prevents it from being deflected in the shell. In addition, by setting the cushion layer, the weight of the liner can act on the cushion layer through the bottom surface of the first annular support. On the outer periphery of the tank, it is beneficial to ensure that the inner tank is firmly fixed.

Preferably, an engaging portion matched with the connecting portion is formed on the inner side of the first annular bracket along its circumferential direction, and the engaging portion forms an engaging connection with the connecting portion, so that the middle barrel Its axis cannot move.

With the above-mentioned structure, the middle barrel can be prevented from moving along its axial direction through the engaging connection between the engaging portion and the connecting portion, so that the connection between the inner container and the inner container supporting member is more stable, and the inner container can stand firmly.

Preferably, a second annular bracket is integrally formed on the inner side of the edge of the end cover for radially maintaining and positioning the middle barrel, and corresponding to the inner side of the second annular bracket, a second annular bracket is integrally formed on the inner surface of the end cover to support the barrel. The plurality of protrusions supported by the head are formed with a first curved surface matching the arc-shaped bottom surface of the head.

With the above-mentioned structure, since the ring bracket and the protrusion are integrally formed on the end cover, the structure of the support member of the inner tank can be made more stable, and at the same time, the first curved surface formed on the protrusion matches the arc-shaped bottom surface of the head , which is more conducive to the combination with the bottom surface of the head, making it more tightly connected.

Preferably, a third ring bracket is integrally formed on the inner side of the edge of the end cover for radially maintaining and positioning the middle barrel, and on the third ring bracket is formed at equal intervals along its circumference to align the head There are at least three supporting pieces for supporting, and a second curved surface matching with the arc-shaped bottom surface of the sealing head is formed on the supporting pieces.

With the above-mentioned structure, since the ring-shaped bracket, the supporting piece and the second curved surface are integrally formed on the end cover, the structure of the support member of the inner tank can be made more stable, and at the same time, the sealing head is supported by the supporting piece having the second curved surface, Therefore, the aforementioned cushion layer can be replaced, and the foam material can be prevented from entering into the end of the inner tank, causing the bottom of the tank to be unbalanced in force and tilted.

Preferably, at least three support parts are integrally formed around the center on the inner surface of the end cover, and a column is formed on the outside of the support part for radially maintaining and positioning the middle tub, and around the inside of the support part The center of the end cap is integrally formed with a third curved surface matching with the arc-shaped bottom surface of the sealing head and used to support the sealing head.

With the above structure, since the end cover is integrally formed with a column and the column is arranged on the outer circumference of the middle barrel, it is beneficial to realize the radial positioning of the centering barrel. At the same time, because the third curved surface matches the bottom surface of the split head, it can make the split head The combination with the supporting part of the liner is tighter, which is beneficial to the central positioning of the liner.

Preferably, a stepped portion is formed on the inner side of the column, and the connecting portion overlaps the stepped portion.

With the above structure, through the cooperation between the stepped portion and the connecting portion, the axial movement of the inner container can be limited, which is beneficial to the central positioning of the inner container.

Preferably, an annular positioning part is further provided on the upper and/or middle part of the middle barrel.

With the above structure, since the annular positioning part is directly arranged in the foaming space between the inner tank and the outer shell, and is closely attached to the inner side of the outer shell and the outer side of the inner tank, it can support the gap between the outer shell and the inner tank, and resist The influence of axial force, so as to realize the reliable positioning of the liner.

Description of drawings

Fig. 1 is the schematic diagram of the water heater of the present utility model, is the first embodiment;

Fig. 2 is an oblique view of the water heater shown in Fig. 1;

Fig. 3 is a schematic diagram of the ring bracket installed on the water heater shown in Fig. 2;

Fig. 4 is a schematic diagram of setting a cushion on the water heater shown in Fig. 1;

Fig. 5 is a schematic diagram of a water heater of the present invention, which is a second embodiment;

Fig. 6 is a schematic diagram of the ring bracket installed on the water heater shown in Fig. 5;

Fig. 7 is a schematic diagram of the water heater of the present utility model, which is a third embodiment;

Fig. 8 is a schematic view of the support part of the inner tank installed on the water heater shown in Fig. 7;

Fig. 9 is a schematic diagram of a water heater of the present utility model, which is a fourth embodiment;

Fig. 10 is a schematic diagram of the support portion of the inner tank installed on the water heater shown in Fig. 9;

Fig. 11 is a schematic diagram of the water heater of the present utility model, which is the fifth embodiment;

Fig. 12 is a schematic diagram of the inner tank support portion installed on the water heater shown in Fig. 11;

Fig. 13 is a schematic diagram of setting a middle barrel positioning part on the water heater shown in Fig. 11 .

Detailed ways

The water heater provided by the utility model will be specifically described below in conjunction with FIGS. 1-13 .

The water heater includes an inner tank 1 , an outer shell 4 for accommodating the inner tank 1 , and an end cap 3 for closing the outer shell 4 , and a foaming space 6 is formed between the outer shell 4 and the inner tank 1 . Wherein, the liner 1 is composed of a middle barrel 11, an open end (not shown, that is, the upper end of the liner 1 in Fig. 13 ) and a closed end (that is, the head 12, also It is the lower end of inner bag 1 among Fig. 13) composition. The middle barrel 11 and the bottom surface head 12 are fixed together by welding, wherein a raised weld seam 13 (constituting the connection part described in the present invention) is formed on the outer surface of the junction of the two.

1-4 are schematic diagrams of the first embodiment of the water heater. As shown in Figures 1-4, the lower end of the inner tank 1 is provided with an annular bracket 221 (constituting the middle barrel holding part described in the utility model, and also the first annular bracket described in the utility model), the annular bracket 221 is a split arrangement, which consists of two parts, as shown in Figure 3, a groove 2211a and a through hole 2211b are formed at one end of one part, and a groove 2211b is formed at the end connected to this end on the other part. The protrusion 2212a engaged with the groove 2211a and the buckle 2212b engaged with the through hole 2211b, correspondingly, form the same structure on the other end of each part. The engagement connection between the two parts of the ring support 221 is achieved through the engagement of the groove 2211a and the protrusion 2212a, and the through hole 2211b and the buckle 2212b respectively, so that the two parts are connected into one body. The inner side of the top of the ring bracket 221 is formed with a groove 211 matched with the weld 13 (constituting the engaging part of the present utility model), and the groove 211 is arranged on its periphery along the circumference of the weld 13, thereby The inner tank 1 can be positioned in the circumferential direction, and at the same time, because the weld 13 is embedded in the groove 211, it can also prevent the foam material from entering the bottom of the inner tank 1, and prevent the bottom of the inner tank 1 from being damaged due to the foam material entering the bottom of the inner tank 1. Deflection occurs due to uneven force.

With the above-mentioned structure, the two parts of the annular bracket 221 are arranged on the outside of the weld seam 13 in an engaging manner, and the upper part of the annular bracket 221 is arranged on the outer periphery of the lower end of the liner 1, wherein the groove 211 and the weld seam 13 form a locking so that the liner 1 cannot move along its axial direction; the inner side of the cylindrical part above the groove 211 of the annular bracket 221 is close to the outer side of the end of the middle barrel 11 near the weld 13, so that the annular The bracket 221 forms radial positioning along the outer side of the middle barrel 11 to center the barrel 11 so that it is arranged along the axial direction of the shell 4, and the circumferential direction of the shell 4 and the liner 1 are arranged at equal intervals to prevent the foaming material from During the foaming process, the liner 1 is inclined to affect the assembly quality.

As shown in FIG. 4 , the annular support 221 is disposed separately from the end cover 3 , and the bottom of the annular support 221 is disposed inside the end cover 3 . A cavity 32 with a certain volume is formed by the ring bracket 221 , the end cover 3 and the head 12 . A cushion layer 311 between the ring support 221 and the end cover 3 is disposed in the cavity 32 . By setting the cushion layer 311, the weight of the liner 1 can act on the cushion layer 311 through the bottom surface of the ring support 221, and because there is a certain gap between the cushion layer 311 and the bottom surface of the liner 1, the weight of the liner 1 can act on the ring support On the periphery of 221, it is beneficial to ensure that the liner 1 is firmly fixed. At the same time, because the cushion layer 311 is arranged between the ring bracket 221 and the end cap 3 , it can prevent the foam material from entering the cavity 32 from the bottom of the end cap 3 , causing the liner 1 to be unbalanced and deflected.

Figures 5 and 6 are schematic diagrams of the second embodiment of the water heater, which differ from the first embodiment shown in Figures 1-4 in that, as shown in Figure 5, the lower end of the inner tank 1 is provided with The ring bracket 222 (constituting the middle barrel holding part of the present invention, and also the first ring bracket of the invention), the ring bracket 222 is integrally arranged. As shown in Figure 6, a plurality of protrusions 212 (constituting the locking part of the present utility model) are formed on the inner surface of the upper part of the ring bracket 222, and the protrusions 212 are formed inside the ring bracket 222 and along its circumference. equally spaced distribution. With the above-mentioned structure, the upper part of the annular bracket 222 is arranged on the outer periphery of the lower end of the inner container 1, and the protrusion 212 is pressed against the outer peripheral side of the end of the middle barrel 11 close to the end of the head 12, so that the inner container 1 is circumferentially Positioning to avoid deflection and affect the quality of assembly. At the same time, the cylindrical part of the annular bracket 222 located on the upper part of the protrusion 212 is arranged on the outer periphery of the end of the middle barrel 11 close to the head 12, so as to realize the radial positioning of the middle barrel 11 and prevent it from tilting in the casing 4.

Figures 7 and 8 are schematic diagrams of a third embodiment of the water heater, which is different from the second embodiment described in Figures 5-6 above in that, as shown in Figure 7, the lower end of the inner tank 1 is set There is a second annular bracket 223 (constituting the middle bucket holding part in the present invention), and the second annular bracket 223 is integrally formed on the inner surface of the end cover 3 . As shown in Figure 8, a plurality of protrusions 312 are formed at equal intervals on the inner surface of the end cap 3, and on the protrusions 312 there is a curved surface 23 matched with the arc-shaped bottom surface of the head 12 (constituting the utility model). A new first curved surface), and the curved surface 23 gradually increases from the radial inner side of the end cover 3 to the radial outer side thereof. In addition, reinforcing ribs 331 are also formed on the inner surface of the end cover 3, and the reinforcing ribs 331 and the protrusions 312 are arranged at intervals to strengthen the entire end cover 3, so that the end cover 3 can withstand greater pressure. In order to support the liner 1 better. With the above-mentioned structure, the end cap 3 is assembled at the end of the inner tank 1, the second annular bracket 223 is arranged on the outer periphery of the lower end of the inner tank 1, and the inner side of the upper part of the second annular bracket 223 is closely arranged on the inner barrel 11 close to the seal. On the outer peripheral side of the end of the head 12, so as to realize the radial positioning of the centering barrel 11 and avoid its deflection; 1 is located in the middle of the end cover 3 to realize the central positioning of the liner 1.

Compared with the second embodiment shown in Fig. 5 and Fig. 6, in this embodiment, the inner tank supporting member of the present invention is formed by the protrusion 312 arranged on the end cover 3 and the second annular bracket 223, and the inner tank The supporting member and the end cover 3 are formed in one body, and this structure is relatively stable, so that the central positioning of the inner container 1 can be better realized. Since the protrusion 312 formed on the inner surface of the end cover 3 has a curved surface 23 that matches the end cap 12, the curved surface 23 makes the end cap 12 and the end cap 3 more closely matched to improve the inner tank 1. stability. In addition, compared with the first embodiment shown in FIGS. 1-4 , the cushion layer 311 shown in FIG. 4 can be reduced, thereby reducing the number of components and simplifying the assembly process of the water heater.

Figures 9 and 10 are schematic diagrams of a fourth embodiment of the water heater, which is different from the first embodiment described in Figures 1 to 4 in that, as shown in Figure 9, on the inner surface of the end cover 3 A third annular support 224 (constituting the middle bucket holding part of the present invention) and a plurality of supporting pieces 313 (constituting the head supporting part of the present invention) integrally formed with the third annular support 224 are integrally formed, wherein , the supporting pieces 313 are sheet-like structures perpendicular to the inner surface of the end cap 3 , and they are equidistantly distributed on the third annular support 224 along the circumferential direction of the third annular support 224 . A curved portion 313a (constituting the second curved surface of the present invention) that is matched with the arc-shaped bottom surface of the head 12 is formed on the part of the support piece 313 near the middle of the end cap 3. On the support piece 313 A cylindrical portion 224a extending from the welding seam 13 toward the middle barrel 11 is formed on the edge portion away from the middle position of the end cover 3 . With the above structure, the end cap 3 is assembled at the end of the inner tank 1. On the one hand, the third annular bracket 224 is arranged on the outer periphery of the lower end of the inner tank 1, wherein the inner side of the cylindrical portion 224a is closely attached to the middle barrel 11. on the outer peripheral side of the end close to the end of the head 12, so as to realize the circumferential positioning of the liner 1 and avoid its deflection; The liner 1 is located in the middle of the end cover 3 to realize the central positioning of the inner liner 1 .

Compared with the aforementioned first embodiment, the water heater shown in Fig. 9 and Fig. 10 is used, since the third annular support 224 is integrated with the end cap 3, it can strengthen the central positioning ability of the end cap 3 to the inner tank 1, and at the same time, reduce the The number of parts, thereby reducing the installation process. The central positioning of the head 12 is achieved by the curved portion 313a formed on the support piece 313, thereby replacing the cushion layer 311 shown in FIG. 4, which can reduce the number of components and simplify the installation process. In addition, a closed space is formed by the third annular bracket 224 , the sealing head 12 and the end cap 3 , so as to prevent the foam material from entering the bottom of the inner container 1 and causing uneven stress and deflection.

Fig. 11 and Fig. 12 are schematic diagrams of the fifth embodiment of the water heater, which is different from the fourth embodiment described in Fig. 9 and Fig. 10 in that, as shown in Fig. 11 , the lower end of the inner tank 1 is provided with The end cover 3 is integrally formed with a plurality of support pieces 314 arranged at equal intervals on the inner surface of the end cover 3 (constituting the support part of the present invention). As shown in Figure 12, the support piece 314 is a sheet structure perpendicular to the inner surface of the end cover 3, and a column 314c with straight sides is formed on the outside of the support piece 314, and a column 314c with a straight edge is formed on the inside of the support piece 314. The curved portion 314a (constituting the third curved portion of the present utility model) matched with the arc-shaped bottom surface. Three reinforcing ribs 332 perpendicular to each other are sequentially formed on a single support piece 314 , and the height and area of the reinforcing ribs 332 increase sequentially from the radially inner side to the radially outer side. The reinforcing ribs 332 are distributed concentrically and stepwise on the support piece 314 as a whole, which can strengthen the entire end cover 3 so that the end cover 3 can withstand greater pressure to better support the inner container 1 . A foaming material flow port 34 is also opened at the center of the supporting piece 314 close to the end cap 3 , and the foaming material flowing port 34 is concentrically distributed on the supporting piece 314 . When foaming, the foaming material fills the bottom of the inner container 1 and the foaming space 6 through the foaming material flow port 34, and this structure is relatively stable so as to realize the fixing of the inner container 1. A stepped portion 314b having a right-angled side is formed inside the edge portion of the support piece 314 .

With the above-mentioned structure, the end cover 3 is assembled at the end of the inner tank 1. On the one hand, the weld seam 13 is overlapped on the step portion 314b, thereby forming a supporting effect on the inner tank 1. It is arranged on the outer circumference of the middle barrel 11, and the column 314c extends into the direction of the middle barrel 11 from the welding seam 13, so as to form a circumferential positioning for the middle barrel 11 and avoid its deflection; on the other hand, because it is formed on the support The curved portion 314a on the piece 314 cooperates with the arc surface of the head 12, so that the liner 1 can be located in the middle of the end cap 3, and the center positioning of the liner 1 can be realized.

In the above-mentioned embodiment, the inner tank is positioned in the center only through the cooperation between the bottom of the inner tank and the end cap. In addition, as shown in FIG. Part 7. The annular positioning part 7 is realized by EPS (Expandable Polystyrene, expandable polystyrene raw material) or plastic parts, and several discontinuously arranged protrusions 71 are arranged on its surface, and the protrusions 71 form a shape in the foaming space 6. In the tensioned state, its surface is closely attached to the inner surface of the outer shell 4, used to support the gap between the outer shell 4 and the inner tank 1, and resist the influence of axial force, so as to realize reliable positioning of the inner tank 1.

The above descriptions are only specific embodiments of the present utility model, and are not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

For example, in the above-mentioned embodiment 1 to embodiment 5, the inner tank supporting member is set at the lower end of the water heater inner tank, but it is not limited to this, and the aforementioned inner tank supporting member can also be set at the upper end of the water heater inner tank, so as to utilize the inner tank of the water heater. The two end covers realize the central positioning of the liner from its two ends.

In addition, for example, in Embodiment 1, as shown in FIG. 3 , the ring bracket 221 is connected by snap-fitting, but it is not limited to this connection method, and the two parts of the ring bracket 221 can also be connected by screws.

Inside and outside, for example, as shown in FIG. 13 , the annular positioning part 7 is set on the upper part of the middle barrel, and it can also be set on the middle part or the lower part of the middle barrel. In addition, a plurality of annular positioning parts can also be provided at the upper part and the middle part of the middle barrel at the same time.

In addition, for example, in the first to fifth embodiments above, the middle barrel 11 and the head 12 are connected by welding, so that a convex weld 13 can be formed at the joint between the middle barrel 11 and the head 12, not Limited to this, the weld seam 13 can also be replaced by other structures, for example, a convex structure is formed on the inner tank along its circumference, and then a card matching the convex structure is formed on the corresponding inner tank support. Or, if an inset structure is formed on the inner tank along its circumference, then an embedded structure capable of embedding the indented structure is formed on the corresponding inner tank support.

Claims (10)

1. A water heater, comprising an inner container (1), a shell (4) for accommodating the inner container (1), and an end cap (3) for closing the shell (4), wherein the inner container ( 1) Consists of a middle barrel (11) and a head (12) connected to the end of the middle barrel (11), characterized in that, An inner tank supporting member is provided on the end cover (3), and the inner tank supporting member at least includes a middle drum holding portion for holding and positioning the middle drum (11) radially. 2. The water heater according to claim 1, characterized in that, the inner tank support member further comprises a head support portion for supporting the head (12). 3. The water heater according to claim 1 or 2, characterized in that a connecting portion (13) is formed at the connection between the middle barrel (11) and the head (12), and one end of the middle barrel holding portion It is arranged on the inner side of the end cover (3), and its other end is arranged on the outer periphery of the middle barrel (11) close to the connecting part (13). 4. The water heater according to claim 1, characterized in that, a first annular support (221, 222) for radially maintaining and positioning the middle barrel (11) is provided on the end cover (3) and separate from it ), between the first annular support (221, 222) and the end cap (3), there is a pad to make the weight of the inner tank (1) act on the circumferential direction of the first annular support (221, 222) layer (311). 5. The water heater according to claim 4, characterized in that, an engaging portion ( 211, 212), the engaging portion (211, 212) forms an engaging connection with the connecting portion (13). 6. The water heater according to claim 1 or 2, characterized in that a second annular bracket (223) for radially maintaining and positioning the middle tub (11) is integrally formed on the inner side of the edge of the end cover (3), Corresponding to the inner side of the second annular bracket (223), a plurality of protrusions (312) for supporting the head (12) are integrally formed on the inner surface of the end cover (3). A first curved surface (23) matching the arc-shaped bottom surface of the head (12) is formed on the riser (312). 7. The water heater according to claim 1 or 2, characterized in that a third annular bracket (224) for radially maintaining and positioning the middle tub (11) is integrally formed on the inner side of the edge of the end cover (3) ), at least three support pieces (313) for supporting the head (12) are formed on the third annular support at equal intervals along its circumference, and on the support pieces (313) are formed a The second curved surface (313a) matched with the arc-shaped bottom surface of the head (12). 8. The water heater according to claim 1 or 2, characterized in that at least three support parts (314) are integrally formed on the inner surface of the end cover (3) around its center, and the support parts (314) ) is formed with a column (314c) for radially maintaining and positioning the middle barrel (11), and a support (314) is integrally formed around the center of the end cover (3) on the inner side of the support portion (314) and is integrally formed with the head (12) The third curved surface (314a) matched with the arc-shaped bottom surface of the seal head (12). 9. The water heater according to claim 8, characterized in that a stepped portion (314b) is formed inside the column (314c), and the connecting portion (13) overlaps the stepped portion (314b). 10. The water heater according to claim 1 or 2, characterized in that, an annular positioning portion (7) is further provided on the upper part and/or the middle part of the middle tub (11).

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