阅读说明：本技术 太阳能热水器 (Solar water heater ) 是由 费家哲 于金霞 李伟 罗嘉阳 门广岳 孙晓光 于 2020-12-25 设计创作，主要内容包括：本发明属于热水器技术领域,具体涉及一种太阳能热水器。本发明旨在解决现有热水器注液管容易相对注液口偏移而使注液管被外壳遮挡,不方便注液的问题。本发明太阳能热水器,在其换热器的注液管和外壳体的注液口设置封堵组件,封堵组件包括限位套,限位套套设在注液管的外侧,且限位套的第一端与外壳体固定连接,如此可以相对限制注液管和注液口的位置,避免注液管相对注液口移动,影响换热介质注入的便利性。(The invention belongs to the technical field of water heaters, and particularly relates to a solar water heater. The invention aims to solve the problem that the liquid injection pipe of the existing water heater is easy to deviate relative to the liquid injection port, so that the liquid injection pipe is shielded by the shell and is inconvenient to inject liquid. According to the solar water heater, the liquid injection pipe of the heat exchanger and the liquid injection port of the outer shell are provided with the plugging assembly, the plugging assembly comprises the limiting sleeve, the limiting sleeve is sleeved on the outer side of the liquid injection pipe, and the first end of the limiting sleeve is fixedly connected with the outer shell, so that the positions of the liquid injection pipe and the liquid injection port can be relatively limited, and the phenomenon that the liquid injection pipe moves relative to the liquid injection port to influence the convenience of injecting a heat exchange medium is avoided.)

1. A solar water heater, comprising: the heat exchanger is provided with a liquid injection pipe, and the outer shell is provided with a liquid injection port opposite to the liquid injection pipe;

the plugging component comprises a limiting sleeve, the limiting sleeve is sleeved on the outer side of the liquid injection pipe, and the first end of the limiting sleeve is fixedly connected with the outer shell.

2. The solar water heater according to claim 1, wherein a limiting ring is arranged on the inner side surface of the second end of the limiting sleeve, the limiting ring is sleeved on the outer side of the liquid injection pipe, and the limiting ring is fixedly connected with the liquid injection pipe; and an interval is arranged between the limiting sleeve and the liquid injection pipe.

3. The solar water heater according to claim 2, wherein the limiting ring is in interference connection with the liquid injection pipe; or, the limiting ring is clamped with the liquid injection pipe.

4. The solar water heater according to claim 1, wherein an abutting ring is arranged on an outer side surface of the first end of the limiting sleeve, the abutting ring is positioned on an outer side of the outer shell, and the abutting ring abuts against the outer shell;

the butt joint ring with be provided with the draw-in groove between the stop collar, the draw-in groove with annotate liquid mouth joint.

5. The solar water heater according to claim 4, wherein a positioning column is disposed on a side of the abutting ring facing the outer shell, and the positioning column is matched with a positioning hole disposed on the outer shell.

6. The solar water heater according to claim 4, wherein the limiting sleeve is a circular sleeve, and the outer side surface of the limiting sleeve is a conical surface; the outer diameter of the first end of the limiting sleeve is larger than that of the second end of the limiting sleeve.

7. The solar water heater according to any one of claims 1-6, wherein an avoidance opening is provided on the stopper sleeve;

the plugging component further comprises a decorative cover and a plugging piece, the plugging piece is connected with the liquid injection pipe in a sealing mode, and the plugging piece is located in the limiting sleeve;

the decorative cover is provided with a first connecting part and a second connecting part which are opposite at intervals, the first connecting part penetrates through the avoidance opening and is fixedly connected with the inner side of the shell body, the second connecting part is positioned on the outer side of the shell body, and the second connecting part is fixedly connected with the shell body.

8. The solar water heater according to claim 7, wherein the first connection portion comprises at least one claw which is snapped into the inner side of the outer shell through the escape opening.

9. The solar water heater according to claim 8, wherein the first connecting portion comprises at least two of the jaws, the at least two jaws being spaced apart along a circumferential direction of the trim cover.

10. The solar water heater according to claim 7, wherein the second connecting portion is connected to the outer case by a screw.

Technical Field

The invention belongs to the technical field of water heaters, and particularly relates to a solar water heater with a heat exchanger.

Background

The water heater is a device which can increase the temperature of cold water into hot water in a certain time by various physical principles. According to different principles, the water heater can be divided into an electric water heater, a gas water heater, a solar water heater, an air energy water heater, a fast magnetic life water heater and the like. The water heater for heating water by utilizing solar energy is environment-friendly, energy-saving and wide in application.

In the prior art, a wall-mounted solar water heater is provided with a heat exchanger outside a water tank, the heat exchanger and a heat collecting pipe form a closed loop, heat exchange media are filled in the heat exchanger and the heat collecting pipe, and the heat exchange media are utilized to exchange heat with the water tank to heat water in the water tank. The heat exchanger is usually provided with a liquid injection pipe, a liquid injection port opposite to the liquid injection pipe is arranged on the shell outside the heat exchanger, and a liquid injection device passes through the liquid injection port and is connected with the liquid injection pipe so as to inject heat exchange media into the heat exchanger.

However, the liquid injection pipe is easy to deviate relative to the liquid injection port, so that the inner shell and the outer shell of the liquid injection pipe are shielded and liquid injection is inconvenient.

Disclosure of Invention

In order to solve the problems in the prior art, namely the problem that the liquid filling pipe of the existing water heater is easy to shift from the liquid filling opening, so that the liquid filling pipe is shielded by a shell and is inconvenient to fill liquid, the invention provides a solar water heater.

The solar water heater comprises: the heat exchanger is provided with a liquid injection pipe, and the outer shell is provided with a liquid injection port opposite to the liquid injection pipe; the plugging component comprises a limiting sleeve, the limiting sleeve is sleeved on the outer side of the liquid injection pipe, and the first end of the limiting sleeve is fixedly connected with the outer shell.

In an optional technical scheme of the solar water heater, a limiting ring is arranged on the inner side surface of the second end of the limiting sleeve, the limiting ring is sleeved on the outer side of the liquid injection pipe, and the limiting ring is fixedly connected with the liquid injection pipe; and an interval is arranged between the limiting sleeve and the liquid injection pipe.

In an optional technical scheme of the solar water heater, the limiting ring is in interference connection with the liquid injection pipe; or, the limiting ring is clamped with the liquid injection pipe.

In an optional technical scheme of the solar water heater, a butting ring is arranged on the outer side surface of the first end of the limiting sleeve, the butting ring is located on the outer side of the outer shell, and the butting ring is butted with the outer shell; the butt joint ring with be provided with the draw-in groove between the stop collar, the draw-in groove with annotate liquid mouth joint.

In an optional technical scheme of the solar water heater, a positioning column is arranged on one side, facing the outer shell, of the abutting ring, and the positioning column is matched with a positioning hole formed in the outer shell.

In the above optional technical scheme of the solar water heater, the stop collar is a circular collar, and the outer side surface of the stop collar is a conical surface; the outer diameter of the first end of the limiting sleeve is larger than that of the second end of the limiting sleeve.

In the above optional technical scheme of the solar water heater, an avoidance opening is arranged on the limit sleeve; the plugging component also comprises a decorative cover and a plugging piece, and the plugging piece is connected with the liquid injection pipe in a sealing way; the decorative cover is provided with a first connecting part and a second connecting part which are opposite at intervals, the first connecting part penetrates through the avoidance opening and the inner side fixed connection of the shell body, the second connecting part is positioned on the outer side of the shell body, and the second connecting part is fixedly connected with the shell body

In an optional technical scheme of the solar water heater, the first connecting portion includes at least one jaw, and the jaw passes through the avoiding opening and is clamped with the inner side of the outer shell.

In an optional technical solution of the solar water heater, the first connecting portion includes at least two claws, and the at least two claws are arranged at intervals along a circumferential direction of the decoration cover.

In an optional technical scheme of the solar water heater, the second connecting part is connected with the outer shell through a screw.

In an optional technical scheme of the solar water heater, the blocking piece is in threaded connection with the liquid injection pipe.

The solar water heater comprises a liquid injection pipe of a heat exchanger and a liquid injection port of an outer shell, wherein the liquid injection pipe is provided with a sealing component; the limiting sleeve is sleeved outside the liquid injection pipe and the blocking piece, and the first end of the limiting sleeve is fixedly connected with the outer shell, so that the positions of the liquid injection pipe and the liquid injection port can be relatively limited, and the phenomenon that the liquid injection pipe moves relative to the liquid injection port to influence the convenience of injecting the heat exchange medium is avoided; the dress trim cover is provided with first connecting portion and second connecting portion, and first connecting portion and second connecting portion all with shell body coupling, are favorable to improving the stability and the reliability of dress trim cover installation, avoid the dress trim cover to drop and lose, and, first connecting portion and the relative interval setting of second connecting portion for dress trim cover is connected with the shell body in the position of difference, further improves the stability and the reliability of dress trim cover installation, avoids the dress trim cover to drop the aesthetic property that influences the water heater.

Drawings

Preferred embodiments of the closure assembly of the present invention will now be described with reference to the accompanying drawings in conjunction with a wall-mounted solar water heater. The attached drawings are as follows:

FIG. 1 is a schematic structural view of a solar water heater of the present invention;

FIG. 2 is an enlarged schematic view of P of FIG. 1;

FIG. 3 is a schematic view of the stop collar of the plugging assembly of the present invention;

FIG. 4 is a schematic view of the stop collar of the occluding assembly of the present invention in another orientation;

FIG. 5 is a top view of the stop collar of FIG. 3;

FIG. 6 is a sectional view taken along line A-A of FIG. 5;

FIG. 7 is a schematic view of the construction of the decorative cover of the closure assembly of the present invention;

FIG. 8 is a top view of the decorative cover of FIG. 7;

fig. 9 is a sectional view taken along line B-B in fig. 8.

In the drawings: 10. a plugging component; 1. a decorative cover; 11. a first connection portion; 111. a claw; 112. a reinforcing edge; 12. a second connecting portion; 121. connecting holes; 13. a side wall; 14. an end wall; 2. a blocking member; 3. a limiting sleeve; 31. avoiding the opening; 32. a limiting ring; 33. a butting ring; 34. arc-shaped convex strips; 341. a card slot; 36. a conical surface; 37. a positioning part; 371. a positioning column; 38. avoiding the notch; 4. an outer housing; 5. a heat exchanger; 51. a liquid injection pipe; 52. a liquid inlet pipe; 53. a liquid outlet pipe; 54. a cavity; 55. spacing; 6. a water tank; 71. a water outlet pipe; 72. an electric heating tube; 8. and (4) screws.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the direction or positional relationship shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The wall-mounted solar water heater generally comprises a water tank for storing water and a heat collecting pipe, wherein a jacket-type heat exchanger is arranged outside the water tank, and the heat exchanger and the heat collecting pipe are communicated through a connecting pipe to form a closed loop. The heat collector converts absorbed solar radiation into heat energy, so that the temperature of a heat exchange medium in the heat collection pipe is raised, the high-temperature heat exchange medium flows to the heat exchanger through the closed loop and exchanges heat with water in the water tank, the water in the water tank is heated, the heat exchange medium after heat exchange flows back to the heat collection pipe through the closed loop, and the water in the water tank is heated in a circulating mode.

The heat exchanger is usually provided with a liquid injection pipe for injecting a heat exchange medium. And after the heat exchange medium is filled, plugging by using a plug, and opening the plug to inject liquid after the heat exchange medium is lost. The shell outside the heat exchanger is provided with a liquid injection port opposite to the liquid injection pipe, and the liquid injection port is clamped with an appearance sealing cover to shield the plug. However, the clamped appearance sealing cover is easy to fall off and lose in the processes of carrying, transporting and the like, the structure in the shell is exposed, and the attractiveness is influenced; and annotate the liquid pipe and annotate the liquid mouth skew easily relatively to make annotate the liquid pipe inside and outside shell shelter from and inconvenient notes liquid, influence the use.

In view of the above, the invention provides a solar water heater, wherein a plugging piece is connected with a liquid injection pipe in a sealing manner to plug the liquid injection pipe, a decoration cover is arranged on the outer side of a liquid injection port to shield an internal structure, and the decoration cover is respectively clamped and connected with an outer shell in a threaded manner, so that the connection is stable, the falling is not easy, and the attractiveness is improved; set up the stop collar between annotating the liquid mouth and annotating the liquid pipe, the relative notes liquid mouth skew of liquid pipe is annotated in the restriction, improves the convenience of annotating the liquid.

The preferred technical solution of the water heater of the present invention is described below with reference to the above wall-mounted solar water heater.

Referring first to fig. 1 and 2, fig. 1 is a schematic view illustrating a structure of a solar water heater according to the present invention, and fig. 2 is an enlarged schematic view of P in fig. 1.

As shown in fig. 1 and 2, the solar water heater of the present invention comprises a plugging assembly 10, an outer shell 4, a heat exchanger 5 located inside the outer shell 4, and a water tank 6, wherein a liquid injection pipe 51 is arranged on the heat exchanger 5, and a liquid injection port opposite to the liquid injection pipe 51 is arranged on the outer shell 4.

Wherein, the water tank 6 is used for storing water, and the top thereof is provided with a water outlet pipe 71 for discharging hot water. The bottom of the water tank 6 is provided with a water inlet pipe for discharging cold water into the water tank 6. Optionally, an electric heating pipe 72 is further disposed in the water tank 6 for auxiliary heating; a magnesium anode can be arranged in the water tank 6 to prevent the water tank 6 from corroding; a temperature measuring pipe can be arranged in the water tank 6 to detect the temperature of water in the water tank 6.

The heat exchanger 5 in this embodiment is a jacketed heat exchanger, which is wrapped around the outside of the middle tube of the water tank 6, and a cavity 54 for accommodating a heat exchange medium is formed between the heat exchanger 5 and the side wall of the water tank 6. The heat exchanger 5 is provided with a liquid pouring pipe 51 communicating with the cavity 54, and the heat transfer medium can be poured into the cavity 54 through the liquid pouring pipe 51. The heat exchanger 5 is also provided with a liquid inlet pipe 52 and a liquid outlet pipe 53 which are communicated with the cavity 54, the liquid outlet pipe 53 is positioned below the liquid inlet pipe 52, and the heat exchanger 5 is communicated with the heat collecting pipe through the liquid outlet pipe 53 and the liquid inlet pipe 52. High-temperature heat exchange media in the heat collecting pipes enter the cavity 54 through the liquid inlet pipe 52 and exchange heat with water in the water tank 6 through the side wall of the water tank; the heat exchange medium after heat exchange returns to the heat collecting pipe for heating through the liquid outlet pipe 53, and the circulation is repeated in this way, so that the water in the water tank 6 is heated.

The outer case 4 is disposed outside the water tank 6 and the heat exchanger 5 to protect the water tank 6 and the heat exchanger 5. The outer shell 4 is provided with a liquid injection port, and when the heat exchange medium is injected into the heat exchanger 5, the heat exchange medium can be injected through the liquid injection pipe 51 only by passing through the liquid injection port. So, just conveniently pour into heat transfer medium into in the right opposites of liquid mouth and notes liquid pipe 51 need to guarantee to annotate, in case annotate the liquid mouth and annotate the skew of liquid pipe 51 mutually, then can influence the convenience of pouring into heat transfer medium.

To this end, with continued reference to FIG. 2, an embodiment of the present invention provides a closure assembly 10 that includes a stop collar 3. Wherein, 3 covers of stop collar establish in annotate the outside of liquid pipe 51, the first end and the shell body 4 fixed connection of stop collar 3, and the first end of stop collar 3 is the one end of keeping away from heat exchanger 5, and its fixed connection mode with shell body 4 can have the multiple, for example, the first end and the shell body 4 joint of stop collar 3, for example again, the first end and the shell body 4 of stop collar 3 pass through bolted connection etc.. In the embodiment of the invention, the limiting sleeve 3 is sleeved outside the liquid injection pipe 51, and the limiting sleeve 3 is fixedly connected with the outer shell 4, so that the liquid injection pipe 51 can be limited from deviating relative to the outer shell 4, the liquid injection pipe 51 is ensured to be opposite to the liquid injection port of the outer shell 4, and the convenience of liquid injection is improved.

Therefore, the solar water heater provided by the embodiment of the invention is provided with the plugging component 10 at the liquid injection pipe 51 of the heat exchanger 5 and the liquid injection port of the outer shell 4, specifically, the plugging component 10 comprises the limiting sleeve 3, wherein the limiting sleeve 3 is sleeved at the outer side of the liquid injection pipe 51, and the first end of the limiting sleeve 3 is fixedly connected with the outer shell 4, so that the positions of the liquid injection pipe 51 and the liquid injection port can be relatively limited, and the situation that the liquid injection pipe 51 moves relative to the liquid injection port to influence the convenience of injecting the heat exchange medium is avoided.

The construction of the spacing sleeve 3 of the present invention will be described in detail below. Wherein, fig. 3 is a structural schematic diagram of the plugging assembly of the present invention in a first direction of the stop collar; FIG. 4 is a schematic view of the stop collar of the occluding assembly of the present invention in another orientation; FIG. 5 is a top view of the stop collar of FIG. 3; fig. 6 is a sectional view taken along line a-a of fig. 5.

As shown in FIGS. 3 to 6, the inner side surface of the second end of the limiting sleeve 3 is provided with a limiting ring 32, the limiting ring 32 is sleeved on the outer side of the liquid injection pipe 51, and the limiting ring 32 is fixedly connected with the liquid injection pipe 51.

The second end of the position limiting sleeve 3 is the end close to the heat exchanger 5, and a position limiting ring 32 is arranged on the inner side surface of the end, that is, the position limiting ring 32 is located in the position limiting sleeve 3. At this time, the stopper ring 32 is fitted around the outside of the pouring spout 51 and the stopper ring 32 is fixedly connected to the pouring spout 51, so that the stopper ring 32 can restrict the movement of the pouring spout 51 by 360 °, i.e., the stopper ring 32 can restrict the degree of freedom of the pouring spout 51 in a plane perpendicular to the central axis of the stopper sleeve 3. The first end of the limiting sleeve 3 is fixedly connected with the outer shell 4, and the limiting ring 32 at the second end of the limiting sleeve 3 is fixedly connected with the liquid injection pipe 51, so that the degree of freedom of the liquid injection pipe 51 along the axial direction of the limiting sleeve 3 is limited. Thus, the limiting sleeve 3 and the limiting ring 32 limit the displacement of the liquid injection pipe 51 relative to the three-dimensional direction of the outer shell 4, so that the liquid injection pipe 51 is prevented from deviating relative to the outer shell 4, and the convenience of injecting the heat exchange medium into the liquid injection pipe 51 is improved.

In addition, with reference to fig. 2, a space 55 is provided between the limiting sleeve 3 and the liquid injection pipe 51, which can provide a connection space for connecting the injection device and the liquid injection pipe 51 when injecting the heat exchange medium; compared with the whole limiting sleeve 3 contacting with the liquid injection pipe 51, the limiting ring 32 only contacts with the liquid injection pipe 51, and the installation is simpler and more convenient.

In some examples of the fixed connection between the limiting ring 32 and the liquid pouring pipe 51, the limiting ring 32 is in interference connection with the liquid pouring pipe 51, and the connection mode is simple and stable.

In other examples of fixed connection of the limiting ring 32 and the liquid injection pipe 51, the limiting ring 32 is connected with the liquid injection pipe 51 in a clamping manner, for example, an annular clamping groove is formed in the liquid injection pipe 51, and the limiting ring 32 is connected with the annular clamping groove in a clamping manner, so that the installation and the positioning are convenient, and the disassembly and the replacement and the maintenance are convenient.

With continued reference to fig. 3 to 6, the outer side of the first end of the position-limiting sleeve 3 is provided with an abutment ring 33, that is, the abutment ring 33 is located outside the position-limiting sleeve 3. Referring to fig. 2, the abutting ring 33 is located outside the outer shell 4, and the abutting ring 33 abuts against the outer shell 4, so as to achieve a fixed connection with the outer shell 4. Moreover, when the plugging component further comprises the plugging piece 2 and the decoration cover 1, the abutting ring 33 can prevent the liquid injection pipe 51 and the plugging piece 2 from moving outwards and interfering with the decoration cover 1

Further, a clamping groove 341 is arranged between the abutting ring 33 and the limiting sleeve 3, and the clamping groove 341 is clamped with the liquid injection port. The form of the locking groove 341 can be varied, for example, referring to fig. 4, a plurality of arc-shaped protruding strips 34 are arranged on the outer side surface of the first end of the stop collar 3, the arc-shaped protruding strips 34 are arranged along the circumferential direction of the stop collar 3 at intervals, and a locking groove is formed between the arc-shaped protruding strips 34 and the abutting ring 33. For another example, referring to fig. 5 and 6, an annular groove is formed on the outer side surface of the first end of the stop collar 3 to form a slot 341. So make draw-in groove 341 and annotate the lateral wall looks joint of liquid mouth through setting up draw-in groove 341, further improve the stability and the reliability that stop collar 3 and shell body 4 are connected.

With continued reference to fig. 3 to 6, in order to improve the convenience of installing the stop collar 3 and facilitate positioning, a positioning portion 37 is provided on the abutment ring 33, and the positioning portion 37 is a protruding portion formed by partially protruding the abutment ring 33 outward. The positioning portion 37 is provided with a positioning post 371 directed toward the outer case 4, and the positioning post 371 is fitted into a positioning hole provided in the outer case 4. The positioning post 371 may be a cylinder, and the corresponding positioning hole is a circular hole, although the positioning post 371 may also be a cylinder with a cross section in other shapes, for example, the positioning post 371 may also be a quadrangular prism. This embodiment is through setting up reference column 371 on butt ring 33, and reference column 371 and the locating hole on the shell body 4 cooperate, make things convenient for the location installation of stop collar 3, are favorable to improving the convenience of stop collar 3 installation.

In some specific implementations, referring to fig. 4 and 5, the stop collar 3 is a circular collar, the outer side surface of the stop collar 3 is a tapered surface 36, and the outer diameter of the first end of the stop collar 3 is larger than the outer diameter of the second end of the stop collar 3, forming a guide inclined wall. That is, the outside diameter of the stopper sleeve 3 gradually decreases from the outer shell 4 toward the heat exchanger 5. So, when stop collar 3 passes and annotates the liquid mouth and be connected with annotating liquid pipe 51, stop collar 3's conical surface 36 with annotate the liquid mouth cooperation for stop collar 3 can be smooth and easy pass annotate the liquid mouth with annotate the cooperation of liquid pipe 51, can also make things convenient for draw-in groove 341 to slide in annotating the liquid mouth, and then improve the convenience of stop collar 3 installation, improve assembly efficiency.

With continued reference to fig. 2, the plugging assembly of the embodiment of the present invention further comprises a plugging member 2, the plugging member 2 is connected with the liquid injection pipe 51 in a sealing manner, and the plugging member 2 is located in the limiting sleeve 3 to prevent the heat exchange medium in the cavity 5 from leaking through the liquid injection pipe 51. Wherein the plugging piece 2 can be a rubber plug, a screwed plug, etc. In a specific embodiment, the plugging member 2 is screwed with the liquid injection pipe 51, for example, the plugging member 2 is a columnar structure provided with an external thread, the liquid injection pipe 51 is provided with an internal thread, and the plugging member 2 is positioned in the liquid injection pipe 51 to plug the liquid injection pipe 51; for another example, the blocking member 2 is a tubular structure, one end of which is provided with an internal thread, the other end of which is provided with an end cap, the liquid injection pipe 51 is provided with an external thread, the blocking member 2 is sleeved outside the liquid injection pipe 51, and the liquid injection pipe 51 is blocked by the end cap. Optionally, the plugging piece 2 can be an existing plug, redesign is not needed, the structure is simple, and cost reduction is facilitated.

With continued reference to fig. 2, the closure assembly further comprises a trim cover 1, and the trim cover 1 is provided with a first connecting portion 11 and a second connecting portion 12 which are opposite to each other at a distance. Wherein, first connecting portion 11 and the inboard fixed connection of shell body 4, in order to dodge first connecting portion 11, be provided with on the stop collar 3 and dodge opening 31, so first connecting portion 11 can pass the inside fixed connection of dodging opening 31 and shell body 4 that sets up on the stop collar 3. The second connecting portion 12 is located outside the outer shell 4, and the second connecting portion 12 is fixedly connected with the outer shell 4 from the outside.

It should be noted that the term "inner" here refers to the side facing the inside of the water tank 6, and the term "outer" refers to the side facing the outside of the outer casing 4.

The first connecting portion 11 and the second connecting portion 12 may be connected to the outer case 4 in the same manner or in different manners. The first connecting portion 11 and the second connecting portion 12 may be clamped, screwed, bonded, etc. with the outer casing 4, and are not limited herein.

Two connecting portions of dress trim cover 1 of this embodiment all with 4 fixed connection of shell body, are favorable to improving the stability and the reliability of dress trim cover 1 installation, avoid dress trim cover 1 to drop and influence the aesthetic property. Dress trim cover 1 not only plays and shelters from 4 inner structures of shell body, plays pleasing to the eye effect, can also set up the warning words on dress trim cover 1, for example "non professional does not need to open", avoids non professional to tear open by mistake and leads to heat transfer medium to reveal, improves the security performance of water heater. In addition, the device cover 1 can be made of the same material and surface treatment as the outer shell 4, so that the appearance of the water heater is more attractive.

From this, this embodiment shutoff subassembly is through setting up dress trim cover 1, and dress trim cover 1 is provided with first connecting portion 11 and second connecting portion 12, and first connecting portion 11 and second connecting portion 12 all are connected with shell body 4, be favorable to improving the stability and the reliability of dress trim cover 1 installation, avoid dress trim cover 1 to drop and lose, and, first connecting portion 11 and the relative interval setting of second connecting portion 12, make dress trim cover 1 be connected with shell body 4 in different positions, further improve the stability and the reliability of dress trim cover 1 installation, avoid dress trim cover 1 to drop and influence the aesthetic property of water heater

The specific structure of the decorative cover 1 of the present invention is described in detail below, and reference is made to fig. 7 to 9, wherein fig. 7 is a schematic structural view of the decorative cover of the plugging assembly of the present invention; FIG. 8 is a top view of the decorative cover of FIG. 7; fig. 9 is a sectional view taken along line B-B in fig. 8.

Referring to fig. 7 and 9, the trim cover 1 includes an end wall 14 and a side wall 13, wherein the end wall 14 is a flat wall, and the side wall 13 is disposed around the end wall 14 to form a housing structure opened toward the inside of the outer housing 4, so as to reserve a mounting position for the abutting ring 33 disposed at the first end of the position-limiting sleeve 3.

The first connection portion 11 of the trim cover 1 comprises at least one catch 111, the catch 111 being arranged on the end wall 14, and the catch 111 being located on a side of the end wall 14 facing the outer housing 4. The pawl 111 passes through the escape opening 31 and engages with the inside of the outer case 4. With reference to fig. 1, a buckle matched with the claw 111 is disposed on one side of the outer casing 4 facing the heat exchanger 5, so as to fixedly connect the decorative cover 1 to the outer casing 4.

With continued reference to fig. 7, the latch 111 is an L-shaped structure, which is advantageous for improving the fastening firmness. In addition, in order to improve the structural strength of the latch 111, the reinforcing edges 112 are respectively disposed on two sides of the latch 111, and the reinforcing edges 112 are away from the engaging surface, so that the structural strength of the latch 111 can be increased, and the engagement between the latch 111 and the buckle is not affected.

In some examples, the first connection portion 11 includes one pawl 111; correspondingly, the limiting sleeve 3 is provided with an avoiding opening 31, so that the structure is simple, and the installation is convenient.

In other examples, referring to fig. 7, the first connecting portion includes two jaws 111, and the two jaws 111 are spaced apart in a circumferential direction of the deco-cover 1; correspondingly, referring to fig. 5, two escape openings 31 are provided in the stop collar 3. So set up, two jack catchs 111 and second connecting portion 12 form triangle-shaped fixed position, further improve the stability of dress trim cover 1 installation, avoid dress trim cover 1 to drop and lose.

In still other examples, the first connecting portion 11 includes three and more than three claws 111, and a person skilled in the art can set the number of the claws 111 according to the size range of the cosmetic cover 1.

Referring to fig. 7 to 9, the second connecting portion 12 is connected to the outer case 4 by a screw 8. Specifically, the second connecting portion 12 is provided with a connecting hole 121, and with reference to fig. 1, the outer shell 4 is provided with a threaded hole, and the screw 8 is respectively in threaded connection with the connecting hole 121 and the threaded hole, so that the second connecting portion 12 is fixedly connected with the outer shell 4, and the connecting mode is simple and stable.

With reference to fig. 3 to 6, the abutting ring 33 on the stop collar 3 is provided with an avoiding gap 38 for avoiding the screw 8, so that the screw 8 can be in threaded connection with the threaded hole on the outer shell 4.

So, dress trim cover 1 respectively through jack catch 111 with the 4 joints of shell body, through screw and 4 threaded connection of shell body, utilize two kinds of different modes to be connected with shell body 4, improve the stability and the reliability of dress trim cover 1 installation.

In an alternative example, two claws 111 are arranged on the opposite side of the coupling hole 121, and a line between the center of the coupling hole 121 and the center line of the end wall 14 is taken as a center line about which the two claws 111 are symmetrical. At this moment, with reference to fig. 1, the decorative cover 1 and the outer shell 4 form a fixed connection plugging piece 2 in the vertical and vertical three-dimensional space, and the connection is stable and reliable and is not easy to fall off.

In summary, in the solar water heater of the present invention, the plugging component 10 is disposed at the liquid injection port of the liquid injection pipe 51 of the heat exchanger 5 and the liquid injection port of the outer shell 4, specifically, the plugging component 10 includes the decoration cover 1, the plugging member 2 and the limiting sleeve 3, wherein the plugging member 2 is hermetically connected to the liquid injection pipe 51 to plug the liquid injection pipe 51, so as to prevent the heat exchange medium in the liquid injection pipe 51 from leaking; the limiting sleeve 3 is sleeved on the outer sides of the liquid injection pipe 51 and the plugging member 2, and the first end of the limiting sleeve 3 is fixedly connected with the outer shell 4, so that the positions of the liquid injection pipe 51 and the liquid injection port can be relatively limited, and the liquid injection pipe 51 is prevented from moving relative to the liquid injection port to influence the convenience of injecting a heat exchange medium; dress trim cover 1 is provided with first connecting portion 11 and second connecting portion 12, and first connecting portion 11 and second connecting portion 12 all are connected with shell body 4, be favorable to improving the stability and the reliability of dress trim cover 1 installation, avoid dress trim cover 1 to drop and lose, and, first connecting portion 11 and the relative interval of second connecting portion 12 set up, make dress trim cover 1 be connected with shell body 4 in the position of difference, further improve the stability and the reliability of dress trim cover 1 installation, avoid dress trim cover 1 to drop the aesthetic property that influences the water heater.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.