CN219913479U - A water heater and its water tank - Google Patents

Abstract

The utility model relates to a water heater and a water tank thereof. The water tank includes: an inner tank, including a cylinder provided with welds; and a heat exchange component, including a first header, a second header and a heat exchange tube all arranged on the outer peripheral wall of the cylinder; wherein, Both ends of the first header, the second header and the weld extend toward both ends of the barrel, and the two ends of the heat exchange tube are respectively connected to the first header and the a second header; a first gap exists between the connection between the first header and the heat exchange tube and the outer peripheral wall, and at least part of the weld protruding from the outer peripheral wall is accommodated in the first gap; And/or, there is a second gap between the connection point of the second header and the heat exchange tube and the outer peripheral wall, and at least part of the weld protruding from the outer peripheral wall is accommodated in the second gap. The technical problem to be solved by the utility model is how to prevent the welding seam from lifting up the heat exchange tube and causing the heat exchange tube and the inner tank to not fit together.

Description

A water heater and its water tank

Technical field

The utility model relates to the technical field of electrical appliances, specifically a water heater and a water tank thereof.

Background technique

The current air source water heater includes an inner tank and a heat exchange tube. The inner tank is used to hold water. The heat exchange tube is arranged on the outer peripheral wall of the inner tank. Inject refrigerant into the heat exchange tube to heat the inner tank, causing the temperature of the water in the inner tank to rise.

The liner is usually welded from plates, and the welds on the liner usually protrude from the outer peripheral wall of the liner. The heat exchange tubes are usually attached to the liner by elastic hoops. The heat exchange tubes are pressed against the welds, which will cause A gap is created between a part of the heat exchange tube and the outer peripheral wall of the inner tank.

When the heat exchange tube and the liner are closely together, there is contact and heat transfer between the heat exchange tube and the liner. When there is a gap between the heat exchange tube and the liner, there will be an extra air between the heat exchange tube and the liner. layer, the heat exchange method becomes natural convection heat exchange, the heat exchange effect becomes worse, the heat exchange is poor, the refrigerant pressure in the system is high, and the whole machine runs unstable. This gap will also cause it to take longer to heat the water in the tank, reducing energy efficiency.

In particular, when there is a gap at the weld between the heat exchange tube and the liner, it will cause discontinuous contact between the heat exchange tube and the liner, exacerbating the uneven temperature of the water in the liner. The more uneven the water temperature distribution in the liner is, the easier it will be for the refrigerant in the heat exchange tube to condense, which will cause the liquid refrigerant to gradually accumulate in the heat exchange tube at the end.

Utility model content

The technical problem to be solved by this utility model is how to prevent the weld seam from lifting up the heat exchange tube and causing the heat exchange tube and the inner tank to not fit together.

The technical scheme of this utility model to solve the above technical problems is as follows:

A water tank including:

Liners, including cylinders with welded seams; and

A heat exchange assembly, including a first header, a second header and a heat exchange tube all arranged on the outer peripheral wall of the cylinder;

Wherein, both ends of the first header, the second header and the weld extend to both ends of the barrel, and the two ends of the heat exchange tube are respectively connected to the first header. and said second header;

There is a first gap between the connection between the first header and the heat exchange tube and the outer peripheral wall, and at least part of the weld protruding from the outer peripheral wall is accommodated in the first gap; and /Or, there is a second gap between the connection point of the second header and the heat exchange tube and the outer peripheral wall, and at least part of the weld protruding from the outer peripheral wall is accommodated in the second gap.

The beneficial effects of this utility model are:

There is a first gap between the connection point of the first header and the heat exchange tube and the outer peripheral wall of the cylinder, and the part of the weld of the cylinder that protrudes from the cylinder can be accommodated in the first gap. There is a second gap between the connection point between the second header and the heat exchange tube and the outer peripheral wall of the cylinder. The portion of the weld seam of the cylinder that protrudes from the cylinder can also be accommodated in the second gap.

And because the weld seam protrudes from at least part of the outer peripheral wall of the cylinder and is accommodated in the first gap or the second gap, the weld seam of the cylinder body will not push up the heat exchange tube to create an additional gap. The two sides of the heat exchange tube The part between the ends can continuously adhere to the outer peripheral wall of the cylinder, so that when the refrigerant flows through the heat exchange tube, the heat exchange efficiency between the heat exchange tube and the cylinder is higher, and the time to heat the water in the inner tank is It is shortened and the energy efficiency is improved, which can effectively avoid the situation of high refrigerant pressure in the system and unstable operation of the whole machine caused by the heat exchange tube not being close to the cylinder. At the same time, because the heat exchange tubes can continuously adhere to the outer peripheral wall of the cylinder, the water temperature in the inner tank is more evenly distributed when heating the water in the inner tank, thereby reducing the risk of liquid refrigerant gradually accumulating in the heat exchange tubes at the end. , at the same time, the more even distribution of water temperature in the inner tank can make the water heater's temperature-reaching shutdown time more accurate.

On the basis of the above technical solution, the present utility model can also make the following improvements.

In an illustrative embodiment, the first header, the second header and the weld all extend along the axial direction of the barrel.

In an exemplary embodiment, the heat exchange tube is clamped on the barrel.

In an exemplary embodiment, the heat exchange tube is a flat tube.

In an illustrative embodiment, a plurality of heat exchange tubes are provided, and all heat exchange tubes extend from the side wall of the first header facing away from the second header to the side wall of the second header facing away from The side wall of the first header.

In an exemplary embodiment, the barrel is provided with a water inlet and a water outlet;

The water inlet and the water outlet are both located on the side of the first header and the second header facing away from the heat exchange tube.

In an exemplary embodiment, it also includes an electric auxiliary heating component for heating the water in the inner tank;

The electric auxiliary heating component is arranged on the outer peripheral wall of the cylinder and is located on the side of the first header and the second header facing away from the heat exchange tube.

In an exemplary embodiment, the first header is provided with a refrigerant inlet and a refrigerant outlet;

The refrigerant inlet and the refrigerant outlet are respectively provided at both ends of the first header.

In an illustrative embodiment, the heat exchange component further includes a refrigerant interface component, an input pipe, and an output pipe;

The refrigerant interface assembly includes a base and an input connector and an output connector both provided on the base;

Wherein, the base is provided on the outer peripheral wall of the cylinder and is located on the side of the first header and the second header facing away from the heat exchange tube, and the two ends of the input tube are connected respectively. The refrigerant inlet and the input connector, and the two ends of the output pipe are respectively connected to the refrigerant outlet and the output connector.

This application proposes a water heater, which includes a water tank as described above.

Description of the drawings

Figure 1 is a front perspective view of a water tank of the utility model;

Figure 2 is a schematic diagram of the back of a water tank of the utility model;

Figure 3 is a schematic front view of a water tank of the utility model;

Figure 4 is a schematic top view of a water tank of the utility model;

Figure 5 is a partial enlarged view of the water tank in Figure 4.

In the drawings, the parts represented by each number are listed as follows:

100. Water tank; 101. First gap; 102. Second gap; 1. Inner tank; 11. Cylinder; 111. Weld; 12. First end cover; 13. Water outlet; 14. Water inlet; 2. Heat exchange component; 21. First header; 211. Refrigerant inlet; 212. Refrigerant outlet; 22. Second header; 23. Heat exchange tube; 24. Refrigerant interface component; 241. Base; 242. Input connector; 243 , output connector; 25, input pipe; 26, output pipe.

Detailed ways

The principles and features of the present utility model are described below with reference to the accompanying drawings. The examples cited are only used to explain the utility model and are not intended to limit the scope of the utility model.

As shown in Figure 1-3, Figure 1-3 shows the structure of a water tank 100 of a water heater in this embodiment. The water heater may be an air source water heater. The water heater includes a water tank 100 and an outdoor unit. The outdoor machine and the water tank 100 are connected through a refrigerant pipeline. The outdoor machine can drive the refrigerant to circulate between the outdoor machine and the water tank 100 to absorb heat in the air to heat the water stored in the water tank 100 .

The water tank 100 includes an inner tank 1 and a heat exchange component 2 . The inner tank 1 has an inner cavity for storing water. The inner bladder 1 includes a cylinder 11, a first end cap 12 and a second end cap (not shown in the figure). The barrel 11 may be cylindrical. The cylinder 11 is made of welded plates. The cylinder 11 usually has at least one weld 111 extending from one end of the cylinder 11 to the other end of the cylinder 11 . The sheet material can be a good conductor of heat, such as steel or enameled steel. The weld seam 111 on the cylinder 11 protrudes from the outer peripheral wall of the cylinder 11 . The first end cap 12 and the second end cap are configured as generally disc-shaped structures. The first end cap 12 covers one end of the cylinder 11 , and the second end cap covers the other end of the cylinder 11 to seal both ends of the cylinder 11 . The first end cap 12 and the second end cap may be welded to the cylinder 11 , or may be screwed or riveted to the cylinder 11 .

The heat exchange assembly 2 includes a heat exchange tube 23 , a first header 21 and a second header 22 . The heat exchange tube 23, the first header 21 and the second header 22 are all arranged on the outer peripheral wall of the cylinder 11. The first header 21 and the second header 22 may both be configured as straight tubes. Both ends of the first header 21 extend toward both ends of the cylinder 11 . Both ends of the second header 22 extend toward both ends of the cylinder 11 . The first header 21 and the second header 22 are spaced apart. The heat exchange tube 23 extends along the circumferential direction of the cylinder 11 and closely adheres to the outer peripheral wall of the cylinder 11 . One end of the heat exchange tube 23 is connected to the side wall of the first header 21 facing away from the second header 22 , and the other end of the heat exchange tube 23 is connected to a side wall of the second header 22 facing away from the first header 21 . side wall. The first header 21 is connected to the heat exchange tube 23 , and the second header 22 is connected to the heat exchange tube 23 .

The first header 21 can be connected to an external machine of the heat exchanger, and the external machine delivers gaseous refrigerant to the first header 21 , and the temperature of the refrigerant is higher than the temperature of the water in the inner tank 1 . The refrigerant flows from the first header 21 to the second header 22 through the heat exchange tube 23. When the refrigerant flows through the heat exchange tube 23, it conducts heat to the inner pot 1 to heat the water in the inner pot 1.

As shown in FIGS. 4 and 5 , the diameters of the first header 21 and the second header 22 are generally larger than the diameter of the heat exchange tube 23 . Since the diameters of the first header 21 and the heat exchange tube 23 are different, there is a first gap 101 between the connection between the first header 21 and the heat exchange tube 23 and the outer peripheral wall of the cylinder 11. The weld seam of the cylinder 11 111 may be located on the side where the first header 21 connects to the heat exchange tube 23 and is close to the first header 21. At least part of the weld seam 111 of the cylinder 11 protruding from the cylinder 11 may be accommodated in the first gap 101. . The connection between the first header 21 and the heat exchange tube 23 may be a wide pipe section, which may include a part of the first header 21 and/or the heat exchange tube 23 . At the same time, due to the different pipe diameters of the second header 22 and the heat exchange tube 23, there is a second gap 102 between the connection point of the second header 22 and the heat exchange tube 23 and the outer peripheral wall of the cylinder 11. The weld seam 111 can also be located on the side of the second header 22 connecting the heat exchange tube 23 and close to the second header 22. At least part of the weld seam 111 of the cylinder 11 protruding from the cylinder 11 can also be accommodated in the second header 22. Within the second gap 102.

And because at least part of the weld seam 111 protruding from the outer peripheral wall of the cylinder 11 is accommodated in the first gap 101 or the second gap 102, the weld seam 111 of the cylinder 11 will not push up the heat exchange tube 23 and cause additional heat exchanger tubes 23. The gap, the part between the two ends of the heat exchange tube 23 can be continuously in close contact with the outer peripheral wall of the cylinder 11, so that when the refrigerant flows through the heat exchange tube 23, the heat exchange between the heat exchange tube 23 and the cylinder 11 The efficiency is higher, the time for heating the water in the inner tank 1 is shortened, and the energy efficiency is improved, which can effectively avoid the situation of high refrigerant pressure in the system and unstable operation of the whole machine caused by the heat exchange tube 23 not being tightly attached to the cylinder 11 . At the same time, since the heat exchange tube 23 can be continuously attached to the outer peripheral wall of the cylinder 11, when the water in the inner tank 1 is heated, the water temperature distribution in the inner tank 1 is more uniform, thereby reducing the gradual accumulation of liquid refrigerant in the exchanger at the end. risk in the heat pipe 23. At the same time, the water temperature distribution in the inner tank 1 is more uniform, which can make the temperature-reaching shutdown time of the water heater more accurate.

In an illustrative embodiment, the first header 21 extends along the axial direction of the cylinder 11 , the second header 22 extends along the axial direction of the cylinder 11 , and the weld seam 111 of the cylinder 11 extends along the axis of the cylinder 11 extend towards.

The weld seam 111 of the cylinder 11 extends along the axial direction of the cylinder 11, which facilitates cutting of the plates for making the cylinder 11 and also facilitates welding. Both the first header 21 and the second header 22 extend along the axial direction of the cylinder 11 , making it easier to arrange on the cylinder 11 . The extension direction of the first header 21 and the second header 22 is the same as the extension direction of the weld seam 111 of the cylinder 11 , and the weld seam 111 can extend along one side of the first header 21 or the second header 22 .

In an exemplary embodiment, the heat exchange tube 23 is configured as a curved tube. The curvature of the heat exchange tube 23 is greater than π. The curvature of the heat exchange tube 23 is greater than or equal to 300π/180. The heat exchange tube 23 can be a metal tube. The metal tube is elastic and can be clamped on the outer peripheral wall of the cylinder 11 through bending elastic deformation, so that the heat exchange tube 23 is closely attached to the outer peripheral wall of the cylinder 11, and there is no need to fix the heat exchange tube 23 to the cylinder 11 through connectors. On the other hand, the installation of the heat exchange tube 23 is more convenient.

In an exemplary embodiment, the heat exchange tubes 23 are designed as flat tubes. The cross-section of the flat tube is flat. The flat tube is conducive to fitting the outer peripheral wall of the inner tank 1. Compared with the round tube, it is lighter in weight, increases the effective heat exchange area, and reduces the refrigerant charge at the same heat exchange rate. It can also be effectively reduced.

In an illustrative embodiment, a plurality of heat exchange tubes 23 are provided, and the plurality of heat exchange tubes 23 are arranged side by side along the axial direction of the cylinder 11 . Two adjacent heat exchange tubes 23 are spaced apart. The distance between two adjacent heat exchange tubes 23 may be equal. All heat exchange tubes 23 extend from the side wall of the first header 21 facing away from the second header 22 to the side wall of the second header 22 facing away from the first header 21 .

By using multiple heat exchange tubes 23 to heat the cylinder 11 at the same time, the water in the inner tank 1 can be heated faster. Multiple heat exchange tubes 23 are centrally arranged on the same side of the cylinder 11 , and other components welded on the inner bladder 1 can be conveniently arranged on the side of the cylinder 11 where no heat exchange tubes 23 are provided.

In an exemplary embodiment, the water tank 100 further includes an electric auxiliary heating component 3 . The electric auxiliary heating component 3 is used to directly convert electrical energy into thermal energy to heat the water in the inner tank 1 . The electric auxiliary heating component 3 is welded to the outer peripheral wall of the cylinder 11 and is located on the side of the first header 21 facing away from the heat exchange tube 23 and on the side of the second header 22 facing away from the heat exchange tube 23 .

The heat pump system of the water heater has poor heating effect when the ambient temperature is too low. At this time, the water in the inner tank 1 can be heated to the set temperature as quickly as possible through the auxiliary heating of the electric auxiliary heating component 3. The electric auxiliary heating component 3 is arranged on the side of the first header 21 facing away from the heat exchange tube 23 and the side of the second header 22 facing away from the heat exchange tube 23, and the weld seam 111 of the cylinder 11 is arranged close to the heat exchange tube 23. The position of the end of the tube 23 avoids stress concentration caused by the close distance between the connection point of the electric heating component 3 on the cylinder 11 and the weld seam 111 of the cylinder 11 .

In an exemplary embodiment, a water inlet 14 and a water outlet 13 are provided on the wall of the cylinder 11 . The water inlet 14 and the water outlet 13 are both connected to the inner cavity of the inner bladder 1 . The water inlet 14 is used to inject water into the inner tank 1 . The water outlet 13 is used to discharge the water in the inner pot 1 from the inner pot 1 . The water inlet 14 may be provided at the lower end of the cylinder 11 , and the water outlet 13 may be provided at the upper end of the cylinder 11 . The water inlet 14 and the water outlet 13 of the cylinder 11 are both located on the side of the first header 21 facing away from the heat exchange tube 23 and on the side of the second header 22 facing away from the heat exchange tube 23 .

Since the water inlet 14 and the water outlet 13 are both located on the side of the first header 21 facing away from the heat exchange tube 23 and the second header 22 facing away from the heat exchange tube 23, the weld seam 111 of the cylinder 11 is disposed on The position close to the end of the heat exchange tube 23 avoids the stress caused by the close distance between the welding seam 111 of the cylinder 11 and the water inlet 14 or the close distance between the welding seam 111 of the cylinder 11 and the water outlet 13 concentrated.

In an illustrative embodiment, the first header 21 is provided with a refrigerant inlet 211 and a refrigerant outlet 212. The refrigerant inlet 211 is used to inject refrigerant into the first header 21 , and the refrigerant outlet 212 is used to discharge the refrigerant in the first header 21 . The refrigerant inlet 211 and the refrigerant outlet 212 are respectively provided at both ends of the first header 21 . When the first header 21 is installed vertically, the refrigerant inlet 211 may be provided at the top of the first header 21 and the refrigerant outlet 212 may be provided at the bottom of the first header 21 .

After the refrigerant is injected into the first header 21 from the refrigerant inlet 211, it enters the second header 22 along the upper heat exchange tube 23. The refrigerant in the second header 22 enters the first header 22 along the lower heat exchange tube 23. The header 21 finally discharges the refrigerant from the first header 21 through the refrigerant outlet 212 of the first header 21 .

In an illustrative embodiment, the heat exchange assembly 2 also includes an input pipe 25 , an output pipe 26 and a refrigerant interface assembly 24 .

The refrigerant interface assembly 24 includes a base 241, an input connector 242 and an output connector 243. The base 241 is configured as a bracket structure. The base 241 may be welded to the outer peripheral wall of the cylinder 11 and located on the side of the first header 21 facing away from the heat exchange tube 23 and on the side of the second header 22 facing away from the heat exchange tube 23 . Both the input connector 242 and the output connector 243 are provided on the base 241 . One end of the input joint 242 faces the cylinder 11 , and the other end faces away from the cylinder 11 . One end of the output joint 243 faces the cylinder 11 , and the other end faces away from the cylinder 11 . One end of the input pipe 25 is connected to an end of the input joint 242 facing the cylinder 11 , and the other end of the input pipe 25 is connected to the refrigerant inlet 211 of the first header 21 . One end of the output pipe 26 is connected to an end of the output joint 243 facing the cylinder 11 , and the other end of the output pipe 26 is connected to the output joint 243 of the first header 21 .

The input connector 242 and the output connector 243 can be externally connected to refrigerant pipelines. Refrigerant is injected into the input joint 242 , and the refrigerant is injected into the first header 21 through the input pipe 25 . The refrigerant in the first header 21 is also discharged through the output pipe 26 and the output joint 243. Since the base 241 is located on the side of the first header 21 facing away from the heat exchange tube 23 and the second header 22 facing away from the heat exchange tube 23, the weld seam 111 of the cylinder 11 is disposed close to the heat exchange tube 23. The position of the end avoids stress concentration caused by the close distance between the weld 111 of the cylinder 11 and the base 241 .

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis" The directions or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the device referred to. Or elements must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limitations on the invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

In this utility model, unless otherwise expressly stipulated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interaction between two elements, unless otherwise Clear limits. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stipulated and limited, the first feature "on" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in direct contact through an intermediate medium. indirect contact. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and cannot be construed as limitations of the present invention. Those of ordinary skill in the art are within the scope of the present invention. Changes, modifications, substitutions and variations may be made to the above-described embodiments.

Claims (10)

1. A water tank, characterized in that it includes: Liners, including cylinders with welded seams; and A heat exchange assembly, including a first header, a second header and a heat exchange tube all arranged on the outer peripheral wall of the cylinder; Wherein, both ends of the first header, the second header and the weld extend to both ends of the barrel, and the two ends of the heat exchange tube are respectively connected to the first header. and said second header; There is a first gap between the connection between the first header and the heat exchange tube and the outer peripheral wall, and at least part of the weld protruding from the outer peripheral wall is accommodated in the first gap; and /Or, there is a second gap between the connection point of the second header and the heat exchange tube and the outer peripheral wall, and at least part of the weld protruding from the outer peripheral wall is accommodated in the second gap. 2. The water tank according to claim 1, wherein the first header, the second header and the weld all extend along the axial direction of the cylinder. 3. The water tank according to claim 1, characterized in that the heat exchange pipe is clamped on the cylinder. 4. The water tank according to claim 1, characterized in that the heat exchange tube is a flat tube. 5. The water tank according to any one of claims 1 to 4, wherein a plurality of heat exchange tubes are provided, and all heat exchange tubes are directed from the first header to the second header. The side wall of the tube extends to the side wall of the second header facing away from the first header. 6. The water tank according to claim 5, wherein the cylinder is provided with a water inlet and a water outlet; The water inlet and the water outlet are both located on the side of the first header and the second header facing away from the heat exchange tube. 7. The water tank according to claim 5, further comprising an electric auxiliary heating component for heating the water in the inner tank; The electric auxiliary heating component is arranged on the outer peripheral wall of the cylinder and is located on the side of the first header and the second header facing away from the heat exchange tube. 8. The water tank according to claim 5, wherein the first header is provided with a refrigerant inlet and a refrigerant outlet; The refrigerant inlet and the refrigerant outlet are respectively provided at both ends of the first header. 9. The water tank according to claim 8, wherein the heat exchange component further includes a refrigerant interface component, an input pipe and an output pipe; The refrigerant interface assembly includes a base and an input connector and an output connector both provided on the base; Wherein, the base is provided on the outer peripheral wall of the cylinder and is located on the side of the first header and the second header facing away from the heat exchange tube, and the two ends of the input tube are connected respectively. The refrigerant inlet and the input connector, and the two ends of the output pipe are respectively connected to the refrigerant outlet and the output connector. 10. A water heater, characterized by comprising the water tank according to any one of claims 1 to 9.