A spoiler strip, heat exchanger and gas water heater

Abstract

The utility model relates to domestic appliance technical field especially relates to a spoiler, heat exchanger and gas water heater. The spoiler includes mounting piece and deflector, and mounting piece is set in the shape of wave, a plurality of deflectors are set on the mounting piece along the length direction of mounting piece, and the adjacent two deflectors are set in the width direction of mounting piece. Through setting mounting piece, on one hand can play certain hindering effect to water flow, to make water flow velocity reduce, on the other hand still can disturb water flow, to make the water flow along the radial direction of heat exchange pipe each position place all have to the tendency of the wall flow of heat exchange pipe to the pipe, to improve the uniformity of the water flow that passes through heat exchange pipe and is heated. Through setting deflector, water flow flows along the flow face of deflector, and forms vortex in the back flow face of deflector, to meet the requirement of the water flow that passes through heat exchange pipe and mixes heat exchange fully, and then avoid the occurrence of supercooling boiling phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a baffle strip, a heat exchanger and a gas water heater. Background Technology

[0002] A water heater is a device that uses various physical principles to raise the temperature of cold water to produce hot water within a certain time. Based on different principles, they can be divided into electric water heaters, gas water heaters, solar water heaters, magnetic water heaters, air source heat pump water heaters, and central heating water heaters, etc. Gas water heaters are a widely used type. The heat exchanger, as a crucial component of a gas water heater, heats the flowing water and outputs hot water through user terminals (such as faucets or showerheads) for user use.

[0003] A heat exchanger for a gas water heater typically includes end plates, heat exchange tubes, and heat exchange fins. Two end plates are spaced apart along their thickness, and several heat exchange fins are spaced apart between the two end plates along their thickness. Each heat exchange fin has a first tube hole, and the end plates have second tube holes corresponding to the first tube holes. The heat exchange tubes are arranged in a circuitous manner and pass through the first and second tube holes in sequence. The high-temperature flue gas generated by combustion in the combustion chamber flows upward from the bottom of the heat exchanger to transfer heat to the heat exchange fins. The gas then absorbs heat from the heat exchange fins through the tube walls, thus gradually heating the water in the heat exchange tubes. However, the heat exchangers in the relevant technologies usually have the following problems when in use: 1) The water flow velocity is too fast when flowing through the heat exchange tube, and it cannot fully exchange heat with the tube wall; 2) Along the radial direction of the heat exchange tube, the distance between the water flow and the tube wall at different positions is different, which leads to uneven heating of the water flow in the heat exchange tube, and the water flow temperature near the tube wall is higher, which easily causes the phenomenon of supercooling and boiling, resulting in poor heat exchange effect.

[0004] Therefore, there is an urgent need for a baffle, heat exchanger, and gas water heater to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a baffle strip, a heat exchanger, and a gas water heater that can ensure that the water flowing through the heat exchange tube can fully exchange heat with the heat exchange tube and achieve uniform heating of the water flow.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A spoiler strip includes:

[0008] The mounting components are arranged in a wavy shape.

[0009] A plurality of guide vanes are spaced apart on the mounting component along the length direction, and adjacent guide vanes are staggered along the width direction of the mounting component.

[0010] As a preferred embodiment of the spoiler provided by this utility model, the mounting component includes multiple mounting parts, which are connected in sequence, and adjacent mounting parts are arranged at an angle, and each mounting part is connected to the guide plate;

[0011] The mounting portion includes a first surface and a second surface, which are arranged opposite to each other along the width direction of the mounting member. In two adjacent mounting portions, the first surface of one mounting portion is provided with the guide plate, and the second surface of the other mounting portion is provided with the guide plate.

[0012] As a preferred embodiment of the spoiler provided by this utility model, the mounting component further includes a connecting portion, and the connecting portion is connected between each two adjacent mounting portions.

[0013] As a preferred embodiment of the spoiler provided by this utility model, the mounting component has through holes at both ends.

[0014] As a preferred embodiment of the deflector provided by this utility model, the deflector has a fish fin-shaped structure.

[0015] As a preferred embodiment of the spoiler provided by this utility model, the mounting component and the guide vane are an integral structure.

[0016] This utility model also provides a heat exchanger, comprising:

[0017] A heat exchange tube, the inlet of which is connected to an external water source;

[0018] The baffle strip described above is installed in the heat exchange tube.

[0019] As a preferred embodiment of the heat exchange tube provided by this utility model, the heat exchange tube includes:

[0020] The main pipe section, a plurality of the main pipe sections are arranged in parallel and spaced apart, and each of the main pipe sections is provided with the baffle strip;

[0021] Connecting pipe sections, multiple main pipe sections are connected end to end through the connecting pipe sections so that the heat exchange tubes are arranged in a serpentine pattern.

[0022] As a preferred embodiment of the heat exchange tube provided by this utility model, the turbulence strip is fitted with a spring.

[0023] This utility model also provides a gas water heater, including a shell and a heat exchanger as described above. The shell has an inlet end and an outlet end. The heat exchanger is disposed in the shell. The inlet of the heat exchanger tube is connected to the inlet end, and the outlet of the heat exchanger tube is connected to the outlet end.

[0024] The beneficial effects of this utility model are:

[0025] The turbulence strip provided by this utility model includes an mounting component and guide vanes. The mounting component is arranged in a wave-like shape. Multiple guide vanes are spaced apart on the mounting component along its length, and adjacent guide vanes are staggered along the width of the mounting component. When water flows through the heat exchange tube, the wave-like mounting component guides the water flow, causing it to flow along the wave pattern of the mounting component. On the one hand, it can impede the water flow to reduce its velocity; on the other hand, it can turbulent the water flow to create a swirling effect. This causes the water flow at all positions along the radial direction of the heat exchange tube to tend to flow towards the tube wall, improving the uniformity of heating of the water flowing through the heat exchange tube. By setting guide vanes on the mounting component, the water flows along the front surface of the guide vanes and forms vortices on the back surface of the guide vanes. By staggering two adjacent guide vanes along the width direction of the mounting component, vortices can be formed on both sides of the mounting component along the width direction of the heat exchange tube, thereby satisfying the requirement of sufficient mixing and heat exchange of the water flowing through the heat exchange tube, and thus avoiding the occurrence of supercooling boiling.

[0026] The heat exchanger provided by this utility model can turbulently flow through the heat exchange tube by applying the above-mentioned turbulence strip, thereby reducing the flow velocity of the water and enabling sufficient heat exchange with the tube wall, while improving the uniformity of water heating.

[0027] The gas water heater provided by this utility model, by applying the above-mentioned heat exchanger, can achieve sufficient heat exchange between the water flowing through the heat exchange tube and the tube wall, and can improve the uniformity of water heating. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 This is one of the partial cross-sectional schematic diagrams of the heat exchanger provided in this embodiment of the utility model;

[0030] Figure 2 This is a second partial cross-sectional schematic diagram of the heat exchanger provided in this embodiment of the utility model;

[0031] Figure 3 This is one of the structural schematic diagrams of the spoiler provided in this embodiment of the utility model;

[0032] Figure 4 This is the second schematic diagram of the structure of the spoiler provided in this embodiment of the utility model;

[0033] Figure 5 This is the third schematic diagram of the structure of the spoiler provided in this embodiment of the utility model;

[0034] Figure 6 yes Figure 1 A magnified view of a portion at point A.

[0035] In the picture:

[0036] 100. Heat exchanger;

[0037] 10. Spoiler strip; 11. Mounting component; 110. Through hole; 111. Mounting part; 1111. First surface; 1112. Second surface; 112. Connecting part; 12. Guide vane;

[0038] 20. End plate;

[0039] 30. Heat exchanger tubes; 31. Main pipe section; 32. Connecting pipe section;

[0040] 40. Heat exchanger fins;

[0041] 50. Spring. Detailed Implementation

[0042] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts 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.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] like Figures 1-2 As shown, this embodiment provides a gas water heater, which includes a casing (not shown), a combustion chamber (not shown), and a heat exchanger 100. The casing has an inlet end and an outlet end. Both the combustion chamber and the heat exchanger 100 are disposed within the casing, with the heat exchanger 100 located above the combustion chamber. The inlet of the heat exchanger 100 is connected to the inlet end, and the outlet of the heat exchanger 100 is connected to the outlet end. The high-temperature flue gas generated by the combustion of gas in the combustion chamber flows upward to the heat exchanger 100 to exchange heat with the water flowing through the heat exchanger 100, thereby achieving the effect of heating the water in the heat exchanger 100.

[0046] In some embodiments, the heat exchanger 100 includes heat exchange fins 40, end plates 20, and heat exchange tubes 30. Two end plates 20 are spaced apart along the length of the outer casing, and each end plate 20 has a second tube hole. A plurality of heat exchange fins 40 are spaced apart between the two end plates 20 along the length of the outer casing, and each heat exchange fin 40 has a first tube hole. The heat exchange tubes 30 are arranged in a circuitous manner and pass sequentially through the second tube holes of the end plates 20 and the first tube holes of the heat exchange fins 40. High-temperature flue gas flows upward from the bottom of the heat exchanger 100 and transfers heat to the heat exchange tubes 30 through the heat exchange fins 40, thereby heating the water in the heat exchange tubes 30.

[0047] Specifically, the inlet of heat exchanger 100 refers to the inlet of heat exchange tube 30, and the outlet of heat exchanger 100 refers to the outlet of heat exchange tube 30.

[0048] The heat exchangers in the relevant technology have the following problems when in use: 1) The water flow velocity is too fast when flowing through the heat exchange tube, which cannot fully exchange heat with the tube wall; 2) Along the radial direction of the heat exchange tube, the distance between the water flow and the tube wall at different positions is different, which leads to uneven heating of the water flow in the heat exchange tube, and the water flow temperature near the tube wall is higher, which easily causes the phenomenon of supercooling and boiling, resulting in poor heat exchange effect.

[0049] To solve the above problems, such as Figure 3 and combined Figure 1As shown, this embodiment also provides a baffle strip 10, which is installed in the heat exchange tube 30. By installing the baffle strip 10 in the heat exchange tube 30, the baffle strip 10 can impede the water flow to a certain extent, thereby reducing the water flow velocity so that it can have sufficient heat exchange with the heat exchange tube 30; in addition, the baffle strip 10 can turbulent the water flow inside the heat exchange tube 30 to form vortices. On the one hand, it can disperse the water flow to ensure that the water flow can have sufficient heat exchange with the heat exchange tube 30, and on the other hand, the formed vortices can make the water flow uniformly mixed as a whole, so as to achieve more uniform heating.

[0050] Specifically, such as Figures 3-4 and combined Figure 2 As shown, the turbulence strip 10 includes a mounting component 11 and guide vanes 12. The mounting component 11 is wavy. Multiple guide vanes 12 are spaced apart on the mounting component 11 along its length, and adjacent guide vanes 12 are staggered along the width of the mounting component 11. With this arrangement, when water flows through the heat exchange tube 30, the wavy mounting component 11 guides the water flow, causing it to flow along the wavy line of the mounting component 11. This not only obstructs the water flow to reduce its velocity but also turbulents it, creating a swirling effect. Consequently, the water at all positions along the radial direction of the heat exchange tube 30 tends to flow towards the tube wall, improving the uniformity of heating of the water flowing through the heat exchange tube 30. By setting guide vanes 12 on the mounting component 11, the water flows along the front surface of the guide vanes 12 and forms vortices on the back surface of the guide vanes 12. By staggering two adjacent guide vanes 12 along the width direction of the mounting component 11, vortices can be formed on both sides of the mounting component 11 in the width direction of the heat exchange tube 30, thereby satisfying the requirement of sufficient mixing and heat exchange of the water flowing through the heat exchange tube 30, and thus avoiding the occurrence of supercooling boiling.

[0051] Specifically, the mounting component 11 includes multiple mounting sections 111 connected sequentially, with adjacent mounting sections 111 arranged at an angle. Each mounting section 111 is connected to a guide vane 12. Each mounting section 111 includes a first surface 1111 and a second surface 1112, which are arranged opposite each other along the width direction of the mounting component 11. In two adjacent mounting sections 111, the first surface 1111 of one mounting section 111 is provided with a guide vane 12, and the second surface 1112 of the other mounting section 111 is also provided with a guide vane 12. This design can reduce the excessive water resistance generated by the interaction between the guide vanes 12 on the water flowing through the heat exchange tube 30, thereby ensuring smooth water flow.

[0052] In some embodiments, the mounting component 11 further includes a connecting portion 112, with a connecting portion 112 connecting each adjacent mounting portion 111. In this embodiment, the extending direction of the connecting portion 112 is parallel to the axial direction of the heat exchange tube 30, and the two mounting portions 111 connected to both ends of each connecting portion 112 are set at an obtuse angle to the connecting portion 112. This design can avoid the formation of a dead angle for water flow at the sharp corner between the mounting portion 111 and the connecting portion 112 when the included angle between them is too small, so that the water flow cannot pass smoothly when passing through the connection position between the mounting portion 111 and the connecting portion 112.

[0053] In some embodiments, the mounting component 11 and the guide vane 12 are integrally formed to reduce the number of parts, simplify the assembly process, and make installation simple.

[0054] In related technologies, the baffle strip is formed using a spinning process. This spinning process has certain requirements on material thickness, and the resulting baffle strip has a relatively small number of spiral turns, making it unable to achieve a good swirling effect on the water flow within the heat exchange tube. To solve this problem, the baffle strip 10 provided in this embodiment is formed using a stamping process, thereby requiring less material and having a larger number of spiral turns, thus achieving a better swirling effect on the water flow within the heat exchange tube 30.

[0055] like Figure 4 As shown, the disturbance ratio Y of the baffle strip 10 is Y = D / W, where D (pitch) is the distance between two adjacent mounting parts 111, and W is the width of the baffle strip 10. Compared with the baffle strips formed by spinning process in related technologies, the baffle strip 10 provided in this embodiment has a smaller disturbance ratio Y, which can increase the swirling effect of the baffle strip 10 on the water flow in the heat exchange tube 30, thereby increasing the water pressure drop and improving the heat exchange efficiency. At the same time, the increased swirling velocity of the water flow will also thin the flow boundary layer and thermal boundary layer between the water flow and the inner wall of the heat exchange tube 30, thereby avoiding the occurrence of supercooled boiling.

[0056] like Figures 3-4 As shown, through holes 110 are provided at both ends of the mounting component 11. The through holes 110 can balance the water pressure in the heat exchange tube 30 and prevent the turbulence strip 10 from rotating inside the heat exchange tube 30 due to water flow impact.

[0057] like Figure 5As shown, the guide vane 12 has a fin-like structure. That is, on the one hand, the width of the guide vane 12 gradually decreases along its extension direction, with a smaller width at its free end, allowing water to flow smoothly between the guide vane 12 and the inner wall of the heat exchange tube 30, generating a strong vortex and thus improving the heat exchange effect between the water and the inner wall of the heat exchange tube 30. On the other hand, both the front and back surfaces of the guide vane 12 are arc-shaped, ensuring smooth water flow. Furthermore, after passing the free end of the guide vane 12, the water flows rapidly downwards along the back surface, preventing scale formation on the inner wall of the heat exchange tube 30 due to excessively high wall temperature, and also preventing excessive noise caused by overheating and boiling of the water near the wall.

[0058] like Figure 6 and combined Figure 1 As shown, the heat exchange tube 30 includes a main pipe section 31 and a connecting pipe section 32. Multiple main pipe sections 31 are arranged in parallel and at intervals, and each main pipe section 31 is equipped with a baffle 10. The multiple main pipe sections 31 are connected end-to-end via the connecting pipe sections 32, so that the heat exchange tube 30 is arranged in a serpentine pattern. By arranging the heat exchange tube 30 in a serpentine pattern, the space utilization rate of the heat exchanger 100 can be improved, and it can achieve higher heat exchange efficiency. By installing baffles 10 in each main pipe section 31, the water flow at all locations within the heat exchange tube 30 can achieve a better heat exchange effect.

[0059] In some embodiments, the two ends of the baffle 10 abut against the connection positions of the corresponding connecting pipe section 32 and the main pipe section 31. That is, the length of the baffle 10 is approximately equal to the length of the corresponding main pipe section 31. The connection position of the connecting pipe section 32 and the main pipe section 31 is used to limit the baffle 10, so as to prevent the baffle 10 from being displaced under the impact of water flow. It can also save the need for additional limiting structures between the baffle 10 and the heat exchange tube 30, simplify the assembly process, improve assembly efficiency, reduce processing costs, and improve heat exchange effect.

[0060] In some embodiments, a spring 50 is fitted over the baffle 10. The spiral structure of the spring 50 can also create a certain swirling effect on the water flow in the heat exchange tube 30, which, together with the baffle 10, further improves the heat exchange effect of the water flow in the heat exchange tube 30.

[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A spoiler strip, characterized in that, include: The mounting component (11) is arranged in a wavy shape; The guide vanes (12) are spaced apart on the mounting member (11) along the length direction of the mounting member (11), and two adjacent guide vanes (12) are staggered along the width direction of the mounting member (11).

2. The spoiler strip according to claim 1, characterized in that, The mounting component (11) includes a plurality of mounting parts (111), which are connected in sequence, and two adjacent mounting parts (111) are arranged at an angle, and each mounting part (111) is connected to the guide plate (12). The mounting part (111) includes a first surface (1111) and a second surface (1112). The first surface (1111) and the second surface (1112) are arranged opposite to each other along the width direction of the mounting member (11). In two adjacent mounting parts (111), the first surface (1111) of one mounting part (111) is provided with the guide plate (12), and the second surface (1112) of the other mounting part (111) is provided with the guide plate (12).

3. The spoiler strip according to claim 2, characterized in that, The mounting component (11) also includes a connecting part (112), and the connecting part (112) is connected between two adjacent mounting parts (111).

4. The spoiler strip according to claim 1, characterized in that, The mounting component (11) has through holes (110) at both ends.

5. The spoiler strip according to claim 1, characterized in that, The guide vane (12) has a fin-like structure.

6. The spoiler strip according to any one of claims 1 to 5, characterized in that, The mounting component (11) and the guide plate (12) are an integral structure.

7. A heat exchanger, characterized in that, include: Heat exchange tube (30), the inlet of which is connected to an external water source; The turbulence strip as described in any one of claims 1 to 6 is installed in the heat exchange tube (30).

8. The heat exchanger according to claim 7, characterized in that, The heat exchange tube (30) includes: Main pipe section (31), multiple main pipe sections (31) are arranged in parallel and spaced apart, and each main pipe section (31) is provided with the baffle strip; Connecting pipe section (32), multiple main pipe sections (31) are connected end to end through the connecting pipe section (32) so that the heat exchange tube (30) is arranged in a serpentine pattern.

9. The heat exchanger according to claim 7, characterized in that, The spoiler is fitted with a spring (50).

10. A gas-fired water heater, characterized in that, The device includes a housing and a heat exchanger as described in claim 9, the housing having an inlet end and an outlet end, the heat exchanger being disposed in the housing, the inlet of the heat exchange tube (30) of the heat exchanger being connected to the inlet end, and the outlet of the heat exchange tube (30) being connected to the outlet end.

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