Heat exchange tube assembly and heat exchanger and water heater comprising same

Abstract

The utility model provides a kind of heat exchange tube assembly and including its heat exchanger, water heater.The heat exchange tube assembly includes straight pipe and elbow, straight pipe includes liquid inlet and liquid outlet, and the internal cavity of the liquid inlet and liquid outlet intercommunication;Heat exchange tube assembly further includes: at least three scale removal elements, sequentially set in internal cavity along the extension direction of internal cavity, scale removal element can rotate under the action of water flow, the end of scale removal element is used to scrape off scale adhered on inner wall, two adjacent scale removal elements are surrounded to form accommodating space with inner wall;One temperature memory element is set in one of accommodating space, when the instant temperature of liquid in internal cavity is greater than preset temperature, the length of temperature memory element increases with the instant temperature of liquid, and the length change of temperature memory element itself drives the scale removal element adjacent thereto to move in internal cavity.

Description

Technical Field

[0001] This utility model relates to a heat exchange tube assembly and a heat exchanger and water heater including the same. Background Technology

[0002] In existing technologies, the liquid in the heat exchanger and heat exchange tube assembly of a water heater is mostly water. Scale will be generated during the heat exchange process. The longer the heat exchanger is used, the more scale will be generated, requiring manual cleaning and disassembly. At this time, the water heater must be stopped, which will reduce the working efficiency of the heat exchanger and increase the workload of workers. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned defects of the prior art and provide a heat exchange tube assembly and a heat exchanger and water heater including the same.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A heat exchange tube assembly includes: a straight tube and a bent tube connecting two adjacent straight tubes, wherein the straight tube includes an inlet and an outlet, and an internal cavity communicating between the inlet and the outlet; characterized in that...

[0006] The heat exchanger tube assembly also includes:

[0007] At least three descaling elements are arranged sequentially at intervals in the internal cavity along the extension direction of the internal cavity. The descaling elements can rotate under the action of water flow. The ends of the descaling elements act on the inner wall of the internal cavity to scrape off the scale adhering to the inner wall. Two adjacent descaling elements and the inner wall form a receiving space.

[0008] A temperature memory element is disposed in one of the receiving spaces. When the instantaneous temperature of the liquid in the internal cavity is greater than a preset temperature, the length of the temperature memory element increases with the instantaneous temperature of the liquid, and the change in the length of the temperature memory element itself drives the adjacent descaling element to move in the internal cavity.

[0009] In this technical solution, a descaling element is designed to rotate under the action of water flow. The end of the descaling element acts on the inner wall of the internal cavity to scrape off the scale adhering to the inner wall. Furthermore, a temperature memory element is designed, the length of which increases with the instantaneous temperature of the liquid. The change in the length of the temperature memory element itself drives the adjacent descaling element to move within the internal cavity, thereby enabling the descaling element to perform descaling at different positions, thus further improving the descaling effect on the inner wall of the internal cavity.

[0010] Preferably, the heat exchanger tube assembly further includes:

[0011] The first fixing part and the second fixing part are arranged at intervals and both are locked in the internal cavity. The first fixing part is arranged near the liquid inlet and the second fixing part is arranged near the liquid outlet.

[0012] A connecting rod is provided along the extension direction of the internal cavity, and its two ends are fixedly connected to the first fixing part and the second fixing part respectively. A plurality of the descaling elements are sequentially inserted through the connecting rod.

[0013] Multiple elastic components are respectively disposed in the remaining receiving spaces other than the receiving space where the temperature memory element is disposed, between the descaling element and the first fixing part, and between the descaling element and the second fixing part.

[0014] In this technical solution, through the above-mentioned arrangement, the length change of the temperature memory element itself can not only drive the adjacent descaling element to move within the internal cavity, but also drive descaling elements in other positions to move within the internal cavity.

[0015] Preferably, the temperature memory element is disposed in the receiving space closest to the liquid inlet;

[0016] The elastic component includes a first elastic component and a plurality of second elastic components. The first elastic component is disposed between the descaling element closest to the liquid inlet and the first fixing part. The second elastic components are disposed in the remaining receiving spaces except for the receiving space where the temperature memory element is disposed, and between the descaling element closest to the liquid outlet and the second fixing part.

[0017] Wherein, the elastic force of the second elastic component is greater than that of the first elastic component; the elastic force of the temperature memory element is the same as that of the second elastic component when the instantaneous temperature of the liquid is less than or equal to the preset temperature; the elastic force of the temperature memory element is greater than that of the second elastic component when the instantaneous temperature of the liquid is greater than the preset temperature.

[0018] In this technical solution, the above-described configuration provides a preferred method for setting the specific position of the temperature memory element. This allows for better relative position movement of each descaling element driven by the temperature memory element, achieving maximum descaling area on the inner wall. It should be noted that if multiple temperature memory elements are used, since both sides of the descaling element have temperature memory elements, the relative position of the descaling element to the inner wall cannot be changed, or can only be changed very slightly.

[0019] Preferably, along the extending direction of the internal cavity, the length of the second elastic member is 1.8 to 2.2 times the length of the descaling element.

[0020] In this technical solution, since the first elastic component is disposed between adjacent descaling elements, by setting the ratio range between the length of the second elastic component and the length of the descaling element, it is possible to avoid the following: if the distance between adjacent descaling elements is too large, some descaling elements may not be able to move into place; if the distance between adjacent descaling elements is too small, an excessive number of descaling elements may be generated, increasing the resistance within the entire pipeline. Furthermore, by limiting the ratio range between the length of the second elastic component and the length of the descaling element, the relative length of the descaling element is also limited, preventing the descaling element from becoming too long and increasing the resistance within the entire pipeline.

[0021] Preferably, the elastic component is a spring.

[0022] In this technical solution, the above-described configuration provides a specific arrangement method for the elastic component.

[0023] Preferably, the descaling element is a turbine structure; and / or,

[0024] The descaling element is made of rubber.

[0025] In this technical solution, by setting the descaling element as a turbine structure, the rotation of the descaling element under the action of water flow can be better realized. By setting the material of the descaling element to rubber, when the end of the descaling element acts on the inner wall of the internal cavity, it will not damage the inner wall, but can effectively scrape off the scale adhering to the inner wall.

[0026] Preferably, the turbine structure includes a rotating shaft and a plurality of blades connected to the rotating shaft, wherein the minimum distance between two adjacent blades along the circumference of the rotating shaft is greater than or equal to 2 mm.

[0027] In this technical solution, by setting the range of minimum distance between two adjacent blades, the liquid can pass through the gap between the two adjacent blades, thereby ensuring that the force of blade rotation is sufficient and minimizing the impact of water resistance formed by the blades on the water flow.

[0028] Preferably, the temperature memory element is a memory alloy spring;

[0029] Along the extension direction of the internal cavity, the length of the temperature memory element is 1.8 to 2.2 times the length of the descaling element.

[0030] In this technical solution, a specific arrangement of the temperature memory element is provided by setting it as a shape memory alloy spring. By setting a range in the ratio between the length of the temperature memory element and the length of the descaling element, the relative position of the descaling element in the inner wall cavity can be better allocated.

[0031] A heat exchanger is characterized in that it includes a combustion chamber and a heat exchange tube assembly as described above, wherein a straight tube of the heat exchange tube assembly passes through the combustion chamber to heat the liquid in the internal cavity.

[0032] A water heater characterized in that it includes a heat exchanger as described above.

[0033] The positive and progressive effects of this utility model are as follows:

[0034] The heat exchange tube assembly of this invention features a descaling element that rotates under the influence of water flow. The end of the descaling element acts on the inner wall of the internal cavity to scrape off the scale adhering to the inner wall. Furthermore, by incorporating a temperature memory element, the length of the temperature memory element increases with the instantaneous temperature rise of the liquid. This change in the length of the temperature memory element drives the adjacent descaling element to move within the internal cavity, thereby enabling the descaling element to perform descaling at different locations and further improving the descaling effect on the inner wall of the internal cavity. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of a heat exchange tube assembly according to a preferred embodiment of the present invention.

[0036] Figure 2 This is a cross-sectional view of a heat exchanger tube assembly according to a preferred embodiment of the present invention.

[0037] Figure 3 This is a schematic diagram of the liquid flow direction within a heat exchanger tube assembly according to a preferred embodiment of the present invention.

[0038] Figure 4 This is a three-dimensional structural diagram of the descaling element of a heat exchanger tube assembly according to a preferred embodiment of the present invention.

[0039] Figure 5 This is a schematic diagram of the internal structure of a water heater according to a preferred embodiment of the present invention.

[0040] Figure 6 This is a partial structural schematic diagram of a water heater according to a preferred embodiment of the present invention.

[0041] Explanation of reference numerals in the attached figures

[0042] Water heater 1000

[0043] Heat exchanger 100

[0044] Heat exchanger tube assembly 1

[0045] Straight pipe 10

[0046] Inlet 11

[0047] Liquid outlet 12

[0048] Internal cavity 13

[0049] 14 cubic meters of space

[0050] 20 bends

[0051] Descaling element 30

[0052] Rotating axis 31

[0053] Leaf 32

[0054] Temperature memory element 40

[0055] First fixing part 51

[0056] Second fixing part 52

[0057] Connecting rod 60

[0058] Elastic component 70

[0059] First elastic component 71

[0060] Second elastic component 72

[0061] Combustion Chamber 2

[0062] Heat exchange fin 3

[0063] The extension direction L of the internal cavity Detailed Implementation

[0064] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0065] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0067] like Figures 1 to 3 As shown, this embodiment provides a heat exchange tube assembly 1, which includes: a straight tube 10 and a bent tube 20 connected between two adjacent straight tubes 10. The straight tube 10 includes an inlet 11 and an outlet 12, and an internal cavity 13 connecting the inlet 11 and the outlet 12.

[0068] The heat exchanger tube assembly 1 also includes at least three descaling elements 30 and a temperature memory element 40.

[0069] At least three descaling elements 30 are arranged sequentially at intervals along the extension direction L of the internal cavity 13. The descaling elements 30 can rotate under the action of water flow. The ends of the descaling elements 30 act on the inner wall of the internal cavity 13 to scrape off the scale adhering to the inner wall. Two adjacent descaling elements 30 and the inner wall form a receiving space 14.

[0070] A temperature memory element 40 is disposed in one of the receiving spaces 14. When the instantaneous temperature of the liquid in the internal cavity 13 is greater than the preset temperature, the length of the temperature memory element 40 increases with the instantaneous temperature of the liquid, and the descaling element 30 adjacent to it moves in the internal cavity 13 through the change in the length of the temperature memory element 40 itself.

[0071] Thus, by setting the descaling element 30 to rotate under the action of water flow, the end of the descaling element 30 acts on the inner wall of the internal cavity 13 to scrape off the scale adhering to the inner wall. Furthermore, by setting a temperature memory element 40, the length of the temperature memory element 40 increases with the instantaneous increase of the liquid temperature, and the change in the length of the temperature memory element 40 drives the adjacent descaling element 30 to move within the internal cavity 13, thereby enabling the descaling element 30 to perform descaling at different positions, thus further improving the descaling effect on the inner wall of the internal cavity 13. The extension direction L of the internal cavity 13 is the length direction of the straight pipe 10. The liquid flow direction within the heat exchange tube assembly 1 is as follows... Figure 3 The direction indicated by the middle arrow.

[0072] Along the extending direction L of the internal cavity 13, the length a1 of the temperature memory element 40 is 1.8 to 2.2 times the length a2 of the descaling element 30. In this way, by setting the ratio range of the length a1 of the temperature memory element 40 and the length a2 of the descaling element 30, the relative position of the descaling element 30 in the inner wall cavity can be better allocated.

[0073] In this embodiment, the heat exchange tube assembly 1 further includes: a first fixing part 51 and a second fixing part 52, a connecting rod 60, and a plurality of elastic components 70. The first fixing part 51 and the second fixing part 52 are spaced apart and both are engaged in the internal cavity 13. The first fixing part 51 is located near the liquid inlet 11, and the second fixing part 52 is located near the liquid outlet 12. The connecting rod 60 is arranged along the extending direction L of the internal cavity 13, and its two ends are fixedly connected to the first fixing part 51 and the second fixing part 52, respectively. A plurality of descaling elements 30 are sequentially inserted through the connecting rod 60. A plurality of elastic components 70 are respectively arranged in the remaining receiving spaces 14 except for the receiving space 14 where the temperature memory element 40 is located, between the descaling element 30 and the first fixing part 51, and between the descaling element 30 and the second fixing part 52. In this way, through the above arrangement, the length change of the temperature memory element 40 itself can not only drive the adjacent descaling element 30 to move within the internal cavity 13, but also drive the descaling elements 30 in other positions to move within the internal cavity 13. When the elastic member 70 is disposed in any of the accommodating spaces 14 other than the accommodating space 14 containing the temperature memory element 40, both ends of the elastic member 70 abut against the descaling elements 30 on both sides of the accommodating space; when the elastic member 70 is disposed between the descaling element 30 and the first fixing part 51, both ends of the elastic member 70 abut against the descaling element 30 and the first fixing part 51 respectively; when the elastic member 70 is disposed between the descaling element 30 and the second fixing part 52, both ends of the elastic member 70 abut against the descaling element 30 and the second fixing part 52 respectively. Both the first fixing part 51 and the second fixing part 52 are columnar structures with through holes, but are not limited to this; the first fixing part 51 and the second fixing part 52 can also be structures of other shapes.

[0074] Preferably, the temperature memory element 40 is disposed in the receiving space 14 closest to the liquid inlet 11; the elastic member 70 includes a first elastic member 71 and a plurality of second elastic members 72. The first elastic member 71 is disposed between the descaling element 30 closest to the liquid inlet 11 and the first fixing part 51. The second elastic members 72 are disposed in the remaining receiving spaces 14 except for the receiving space 14 where the temperature memory element 40 is disposed, and between the descaling element 30 closest to the liquid outlet 12 and the second fixing part 52. The elastic force of the second elastic member 72 is greater than that of the first elastic member 71. The elastic force of the temperature memory element 40 is the same as that of the second elastic member 72 when the instantaneous temperature of the liquid is less than or equal to the preset temperature. The elastic force of the temperature memory element 40 is greater than that of the second elastic member 72 when the instantaneous temperature of the liquid is greater than the preset temperature. Thus, the above configuration provides a preferred solution for setting the specific position of the temperature memory element 40, which can better realize the relative position movement of each descaling element 30 under the action of the temperature memory element 40, achieving maximum descaling area on the inner wall. It should be noted that if multiple temperature memory elements 40 are used, since each descaling element 30 has a temperature memory element 40 on both sides, the relative position of the descaling element 30 to the inner wall cannot be changed, or can only be changed by a very small amount. It should also be noted that the elasticity of the temperature memory element 40 is positively correlated with its length.

[0075] Preferably, along the extending direction L of the internal cavity 13, the length a3 of the second elastic member 72 is 1.8 to 2.2 times the length a2 of the descaling element 30. Thus, since the second elastic member 72 is disposed between adjacent descaling elements 30, by setting the ratio range between the length a3 of the second elastic member 72 and the length a2 of the descaling element 30, it is possible to avoid the distance between adjacent descaling elements 30 being too large, causing some descaling elements 30 to be unable to move into place, and the distance between adjacent descaling elements 30 being too small, resulting in an excessive number of descaling elements 30 and increasing the resistance within the entire pipeline. Furthermore, by limiting the ratio range between the length of the second elastic member 72 and the length of the descaling element 30, the relative length of the descaling element 30 is also limited, preventing the descaling element 30 from being too long and increasing the resistance within the entire pipeline.

[0076] Specifically, the elastic component 70 is a spring. The spring passes through the connecting rod 60. However, it is not limited to this; the elastic component 70 can also be other shapes of components with elastic recovery properties.

[0077] Specifically, the descaling element 30 is a turbine structure. By designing the descaling element 30 as a turbine structure, its rotation under the influence of water flow can be better achieved. However, it is not limited to this; the descaling element 30 can also be any other component capable of rotating under the influence of water flow.

[0078] like Figure 4 As shown, the turbine structure includes a rotating shaft 31 and multiple blades 32 connected to the rotating shaft 31. Along the circumference of the rotating shaft 31, the minimum distance b between two adjacent blades 32 is greater than or equal to 2 mm, so as to ensure that the liquid can pass through the gap between two adjacent blades 32, thereby ensuring that the force of the blades 32 rotation is sufficient and minimizing the impact of the water resistance formed by the blades 32 on the water flow.

[0079] The descaling element 30 is made of rubber, so that when the end of the descaling element 30 acts on the inner wall of the internal cavity 13, it will not damage the inner wall, but can effectively scrape off the scale adhering to the inner wall.

[0080] Specifically, the temperature memory element 40 is a shape memory alloy spring; the shape memory alloy spring passes through the connecting rod 60. However, it is not limited to this, the temperature memory element 40 can also be other components with temperature memory in other shapes.

[0081] The operating principle of the heat exchange tube assembly 1 in this embodiment is as follows: When the water heater 1000 is working, the water flow drives the descaling element 30 to rotate. When the descaling element 30 rotates, its end abuts against the inner wall, thereby scraping off the scale adhering to the inner wall and preventing its accumulation, effectively solving the scale problem. Furthermore, by setting a temperature memory element 40, when the water heater 1000 heats the water, as the water temperature rises, the elasticity of the temperature memory element 40 increases, pushing the descaling element 30 back and forth. The position of the descaling element 30 moving back and forth also varies depending on the water temperature, thus covering all areas of the inner wall.

[0082] like Figure 5 and Figure 6 As shown, this embodiment also provides a heat exchanger 100, which includes a combustion chamber 2 and a heat exchange tube assembly 1 as described above. The specific structure of the combustion chamber 2 is prior art and will not be described further here. Straight tubes 10 of the heat exchange tube assembly 1 pass through the combustion chamber 2 to heat the liquid within the internal cavity 13.

[0083] The heat exchanger 100 also includes multiple heat exchange fins 3 sleeved on the straight pipe 10, with the multiple heat exchange fins 3 arranged at intervals along the length of the straight pipe 10.

[0084] This embodiment also provides a water heater 1000, which includes the heat exchanger 100 as described above.

[0085] The water heater 1000 can be controlled by a voice module, which is equipped with a controller, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the water heater 1000 to perform corresponding operations, thereby realizing intelligent control of the water heater 1000 and improving the user experience.

[0086] In this embodiment, the heat exchange tube assembly 1 is equipped with a descaling element 30 that can rotate under the action of water flow. The end of the descaling element 30 acts on the inner wall of the internal cavity 13 to scrape off the scale adhering to the inner wall. Furthermore, by setting a temperature memory element 40, the length of the temperature memory element 40 increases with the instantaneous temperature of the liquid. The change in the length of the temperature memory element 40 itself drives the adjacent descaling element 30 to move within the internal cavity 13, thereby enabling the descaling element 30 to perform descaling at different positions, thereby further improving the descaling effect on the inner wall of the internal cavity 13.

[0087] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A heat exchange tube assembly, comprising: A straight pipe, and a bend connecting two adjacent straight pipes, the straight pipe including an inlet and an outlet, and an internal cavity communicating between the inlet and the outlet; characterized in that, The heat exchanger tube assembly also includes: At least three descaling elements are arranged sequentially at intervals in the internal cavity along the extension direction of the internal cavity. The descaling elements can rotate under the action of water flow. The ends of the descaling elements act on the inner wall of the internal cavity to scrape off the scale adhering to the inner wall. Two adjacent descaling elements and the inner wall form a receiving space. A temperature memory element is disposed in one of the receiving spaces. When the instantaneous temperature of the liquid in the internal cavity is greater than a preset temperature, the length of the temperature memory element increases with the instantaneous temperature of the liquid, and the change in the length of the temperature memory element itself drives the adjacent descaling element to move in the internal cavity.

2. The heat exchanger tube assembly as described in claim 1, characterized in that, The heat exchanger tube assembly also includes: The first fixing part and the second fixing part are arranged at intervals and both are locked in the internal cavity. The first fixing part is arranged near the liquid inlet and the second fixing part is arranged near the liquid outlet. A connecting rod is provided along the extension direction of the internal cavity, and its two ends are fixedly connected to the first fixing part and the second fixing part respectively. A plurality of the descaling elements are sequentially inserted through the connecting rod. Multiple elastic components are respectively disposed in the remaining receiving spaces other than the receiving space where the temperature memory element is disposed, between the descaling element and the first fixing part, and between the descaling element and the second fixing part.

3. The heat exchange tube assembly as described in claim 2, characterized in that, The temperature memory element is disposed in the receiving space closest to the liquid inlet; The elastic component includes a first elastic component and a plurality of second elastic components. The first elastic component is disposed between the descaling element closest to the liquid inlet and the first fixing part. The second elastic components are disposed in the remaining receiving spaces except for the receiving space where the temperature memory element is disposed, and between the descaling element closest to the liquid outlet and the second fixing part. Wherein, the elastic force of the second elastic component is greater than that of the first elastic component; the elastic force of the temperature memory element is the same as that of the second elastic component when the instantaneous temperature of the liquid is less than or equal to the preset temperature; the elastic force of the temperature memory element is greater than that of the second elastic component when the instantaneous temperature of the liquid is greater than the preset temperature.

4. The heat exchanger tube assembly as described in claim 3, characterized in that, Along the extending direction of the internal cavity, the length of the second elastic member is 1.8 to 2.2 times the length of the descaling element.

5. The heat exchanger tube assembly as described in claim 3, characterized in that, The elastic component is a spring.

6. The heat exchanger tube assembly as described in claim 1, characterized in that, The descaling element is a turbine structure; and / or, The descaling element is made of rubber.

7. The heat exchanger tube assembly as described in claim 6, characterized in that, The turbine structure includes a rotating shaft and a plurality of blades connected to the rotating shaft. Along the circumference of the rotating shaft, the minimum distance between two adjacent blades is greater than or equal to 2 mm.

8. The heat exchanger tube assembly as described in any one of claims 1-7, characterized in that, The temperature memory element is a memory alloy spring; Along the extension direction of the internal cavity, the length of the temperature memory element is 1.8 to 2.2 times the length of the descaling element.

9. A heat exchanger, characterized in that, The heat exchanger includes a combustion chamber and a heat exchange tube assembly as described in any one of claims 1-8, wherein a straight tube of the heat exchange tube assembly passes through the combustion chamber to heat the liquid in the internal cavity.

10. A water heater, characterized in that, The water heater includes the heat exchanger as described in claim 9.

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