Heat exchangers for gas water heaters and gas water heaters

Abstract

This utility model discloses a heat exchanger and a gas water heater for gas water heaters, belonging to the field of home appliance technology. It is designed to solve problems such as high water flow resistance caused by the simple connection structure of existing heat exchange tubes. The heat exchanger for gas water heaters disclosed in this utility model includes: a heat exchange fin assembly; a water pipe assembly, including an inlet pipe and an outlet pipe; and a heat exchange flow pipe assembly, including an inlet bend, an outlet bend, and a relay bend. One end of the inlet bend is connected to the inlet pipe, and the other end is connected to the heat exchange fin assembly; one end of the outlet bend is connected to the outlet pipe, and the other end is connected to the heat exchange fin assembly; both ends of the relay bend are connected to the heat exchange fin assembly. The heat exchanger and gas water heater for gas water heaters disclosed in this utility model can avoid the violent impact of water flow on the pipe connections, resulting in low water flow resistance, low noise, and smoother water flow.

Description

Technical Field

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

[0002] Gas water heaters use the heat generated by burning gas to heat cold water to a set temperature. They mainly consist of a burner and a heat exchanger. The burner is used to burn combustible gas to obtain heat, and the heat exchanger is used to use the heat to heat the cold water.

[0003] In existing gas water heaters, the heat exchanger mainly consists of heat exchange tubes, heat exchange fins, an inlet pipe, and an outlet pipe, with the heat exchange tubes and fins connected together. The two ends of the heat exchange tubes are connected to the inlet pipe and the outlet pipe, respectively. Cold water enters the heat exchange tube through the inlet pipe, and as it flows through the tube, it exchanges heat with the heat exchange fins, using the heat generated by the combustion of the gas to heat the cold water. The heated water then flows out through the outlet pipe.

[0004] The shortcomings of existing heat exchangers include: simple connection structure between heat exchange tubes and inlet pipes, and between heat exchange tubes and outlet pipes; abrupt change in water flow direction at pipe connections; high water flow resistance; high energy consumption; significant noise; and uneven water flow. Utility Model Content

[0005] The purpose of this invention is to propose a heat exchanger and a gas water heater, which solves the problem of high water flow resistance caused by the simple connection structure of existing heat exchange tubes, resulting in smoother water flow.

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

[0007] A heat exchanger for a gas water heater includes: a heat exchange fin assembly for heating low-temperature water to a set temperature; a water pipe assembly including an inlet pipe and an outlet pipe; and a heat exchange flow pipe assembly including an inlet bend, an outlet bend, and a relay bend, wherein one end of the inlet bend is connected to the inlet pipe, and the other end of the inlet bend is connected to the heat exchange fin assembly; one end of the outlet bend is connected to the outlet pipe, and the other end of the outlet bend is connected to the heat exchange fin assembly; both ends of the relay bend are respectively connected to the heat exchange fin assembly; the bending radius of the relay bend is smaller than the bending radius of the inlet bend, and / or the bending radius of the relay bend is smaller than the bending radius of the outlet bend.

[0008] In one preferred embodiment, the water pipe assembly further includes a water outlet connector connected to the water outlet pipe. The water outlet connector includes a connecting seat connected to the water outlet pipe, a mounting seat communicating with the connecting seat, and a connector body. The connecting seat and the mounting seat are respectively disposed on the connector body. The mounting seat has a water outlet hole. The extension direction of the pipe inside the connecting seat forms a set angle with the extension direction of the water outlet hole.

[0009] In one preferred embodiment, the water outlet connector further includes a flange, on which a flange through hole is provided for a connector to pass through, and the connector body is fixed to the flange.

[0010] In one preferred embodiment, the connector can swing relative to the mounting base to change the angle between the connector and the water outlet hole.

[0011] In one preferred embodiment, the water pipe assembly further includes a bypass pipe, one end of which is connected to the inlet pipe and the other end of which is connected to the outlet pipe.

[0012] In one preferred embodiment, the heat exchanger further includes a frame, a through hole is provided on the side wall of the frame, a sleeve is inserted through the through hole, and the inlet bend, the outlet bend and / or the relay bend are respectively inserted in the sleeve.

[0013] In one preferred embodiment, the water pipe assembly further includes a water inlet connector connected to the water inlet pipe. Along the water flow direction, the outer circumferential surface of the water inlet connector is provided with at least three annular grooves in sequence. A sealing ring is fitted in at least two of the annular grooves, and one of the annular grooves is used to insert a pin connector of the water flow sensor.

[0014] On the other hand, the present invention adopts the following technical solution:

[0015] A gas water heater, including a burner, the gas water heater including the aforementioned heat exchanger for gas water heaters, wherein the heat generated by the burner can be exchanged with low-temperature water at the heat exchanger.

[0016] In one preferred embodiment, the gas water heater further includes a housing and a fume hood, the fume hood being connected to the inner wall of the housing via a fastener; the fastener includes a supporting part and a fitting part connected together, the plane of the supporting part and the plane of the fitting part having a set angle between them, and a reinforcing rib being provided between the supporting part and the fitting part; the supporting part is connected to the surface of the fume hood, and the fitting part is connected to the inner wall of the housing.

[0017] In one preferred embodiment, the fitting part includes a fitting body and a fixing plate, the fixing plate being located outside the extending direction of the support part, and the fixing plate having an elongated hole.

[0018] The heat exchanger for gas water heaters disclosed in this utility model features an inlet bend, an outlet bend, and a relay bend, which allows water flow to turn smoothly, avoiding violent impacts on pipe connections caused by sudden changes in direction. This results in low water flow resistance, low noise, reduced power consumption for driving the water flow, lower operating costs, and smoother water flow. It also helps to reduce the size of the heat exchanger, enabling miniaturization of gas water heaters and enhancing product competitiveness.

[0019] The gas water heater disclosed in this utility model also includes the aforementioned heat exchanger for gas water heaters, which can prevent water flow from violently impacting the pipe connections, reduce noise, make the water flow smoother and more gentle when turning, extend the service life of the whole machine, and provide a better user experience. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of a gas water heater provided in a specific embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the heat exchanger provided in a specific embodiment of this utility model;

[0022] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a schematic diagram of the water outlet connector provided in a specific embodiment of this utility model;

[0024] Figure 5 This is an exploded view of the combined structure of the smoke hood and the fastener provided in a specific embodiment of this utility model;

[0025] Figure 6 This is a structural schematic diagram of the fastener provided in a specific embodiment of this utility model.

[0026] In the picture:

[0027] 1. Heat exchanger assembly; 4. Frame; 5. Pipe sleeve; 21. Inlet pipe; 22. Outlet pipe; 23. Outlet connector; 24. Bypass pipe; 25. Inlet connector; 31. Inlet elbow; 32. Outlet elbow; 33. Relay elbow; 100. Heat exchanger; 200. Burner; 231. Connecting seat; 232. Mounting seat; 233. Connector body; 234. Outlet through hole; 235. Flange; 236. Flange through hole; 300. Housing; 400. Fume hood; 500. Fastener; 501. Support; 502. Reinforcing rib; 503. Fitting body; 504. Fixing plate; 505. Long hole; 506. Riveting hole; 507. Flanged edge. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] 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", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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.

[0030] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] This embodiment discloses a heat exchanger for a gas water heater and a gas water heater including the heat exchanger, such as... Figure 1 As shown, the gas water heater includes a burner 200, and the heat generated by the burner 200 can exchange heat with low-temperature water at the heat exchanger 100. Figure 2 and Figure 3 As shown, the heat exchanger for a gas water heater includes a heat exchange fin assembly 1, a water pipe assembly, and a heat exchange flow pipe assembly. The heat exchange fin assembly 1 is used to heat low-temperature water to a set temperature.

[0035] The water pipe assembly includes an inlet pipe 21 and an outlet pipe 22, and the heat exchange flow pipe assembly includes an inlet bend 31, an outlet bend 32, and a relay bend 33. One end of the inlet bend 31 is connected to the inlet pipe 21, and the other end is connected to the heat exchange plate assembly 1. Low-temperature water flows vertically upward along the inlet pipe 21, turns to a horizontal direction after reaching the inlet bend 31, and then flows into the heat exchange plate assembly 1. Correspondingly, one end of the outlet bend 32 is connected to the outlet pipe 22, and the other end is connected to the heat exchange plate assembly 1. Water flowing horizontally in the heat exchange plate assembly 1 enters the outlet bend 32, turns to a vertical direction, and then flows into the outlet pipe 22. The heat exchanger assembly 1 includes at least two heat exchange tubes. The two ends of the relay bend 33 are respectively connected to different heat exchange tubes of the heat exchanger assembly 1. The different heat exchange tubes are connected by the relay bend 33, which extends the flow path of water in the heat exchanger assembly 1, resulting in more complete heat exchange and high efficiency in producing hot water.

[0036] The design of the inlet bend 31, outlet bend 32, and relay bend 33 allows the water flow to turn smoothly, avoiding violent impacts on the pipe connections. This results in low water flow resistance, smoother flow, less noise, reduced power consumption for driving the water flow, and lower operating costs.

[0037] The bending radius of the relay bend 33 is smaller than that of the inlet bend 31, and / or the bending radius of the relay bend 33 is smaller than that of the outlet bend 32, which helps to reduce the volume of the heat exchanger, realize the miniaturization of the gas water heater, and enhance the product competitiveness.

[0038] Based on the above structure, the water pipe assembly also includes a bypass pipe 24. One end of the bypass pipe 24 is connected to the inlet pipe 21, and the other end is connected to the outlet pipe 22. When it is necessary to clean the heat exchanger assembly 1, the bypass pipe 24 is opened, and the water flowing out of the outlet pipe 22 can return to the heat exchanger assembly 1 through the inlet pipe 21, realizing the circulation and flushing of the heat exchanger assembly 1, avoiding the accumulation of sediment in the heat exchanger assembly 1, eliminating the need for frequent disassembly of the gas water heater to clean the heat exchanger assembly 1, making it more convenient to use, and extending the service life of the gas water heater.

[0039] To secure the heat exchanger assembly 1, in this embodiment, the heat exchanger further includes a frame 4, within which the heat exchanger assembly 1 is housed. A through-hole is provided on the side wall of the frame 4, through which a sleeve 5 passes. The inlet bend 31, outlet bend 32, and / or relay bend 33 are respectively inserted into the sleeve 5. The sleeve 5 provides support and protection for the inlet bend 31, outlet bend 32, and / or relay bend 33, preventing displacement under the impact of water flow, thus enhancing safety.

[0040] Based on the above structure, the water pipe assembly also includes an inlet connector 25 connected to the inlet pipe 21. Along the water flow direction, at least three annular grooves are sequentially arranged on the outer circumferential surface of the inlet connector 25, and sealing rings are fitted into at least two of the annular grooves. This double-sealing-ring structure improves sealing performance and prevents leakage at the inlet connector 25; furthermore, if one sealing ring deforms and leaks due to long-term use, the other sealing ring can prevent leakage, resulting in a better user experience; one annular groove is used to insert a pin-type connector for the water flow sensor, which is convenient to install and remove and has low cost.

[0041] Based on the above structure, such as Figure 2 and Figure 4 As shown, the water pipe assembly also includes an outlet connector 23 connected to the outlet pipe 22. The outlet connector 23 includes a connecting seat 231 connected to the outlet pipe 22, a mounting seat 232 communicating with the connecting seat 231, a connector body 233, and a flange 235. The connector body 233 is fixed to the flange 235, and the flange 235 has a flange through hole 236 for passing through connecting parts. Bolts and other connecting parts can be passed through the flange through hole 236 to fix the flange 235 to the mounting surface.

[0042] The connecting seat 231 and the mounting seat 232 are respectively mounted on the connector body 233. The mounting seat 232 has a water outlet hole 234. The extension direction of the pipe inside the connecting seat 231 and the extension direction of the water outlet hole 234 form a set angle. This water outlet connector 23 has a compact structure, eliminates unnecessary components, reduces the amount of processing materials required, lowers manufacturing costs, and improves processing efficiency.

[0043] To broaden the applicability of the water outlet connector 23, in this embodiment, the connecting seat 231 can swing relative to the mounting seat 232 to change the included angle between the connecting seat 231 and the water outlet hole 234. Regardless of how the water outlet pipe 22 and the external pipe are configured, the water outlet pipe 22 can be connected to the connecting seat 231 and the external pipe can be connected to the water outlet hole 234 by adjusting the included angle.

[0044] It is understandable that the angle between the extension direction of the pipe inside the connector 231 and the extension direction of the water outlet hole 234 is not limited and can be determined according to actual usage requirements.

[0045] Based on the above structure, such as Figure 1 , Figure 5 and Figure 6 As shown, the gas water heater also includes a housing 300, a fume hood 400, and a fastener 500. The fume hood 400 is connected to the inner wall of the housing 300 via the fastener 500.

[0046] The fastener 500 includes a support portion 501 and a fitting portion connected together. The support portion 501 has a riveting hole 506, and the exhaust hood 400 has a through hole corresponding to the riveting hole 506. The support portion 501 is fixedly connected to the upper surface of the exhaust hood 400 by riveting, resulting in a stable connection structure and high production efficiency. The fitting portion connects to the inner wall of the housing 300. To improve strength, the edge of the fitting portion is bent to form a flange 507, preventing deformation or even damage to the fitting portion due to pulling by the exhaust hood 400 and other structures. This makes the connection between the fitting portion and the housing 300 more secure and reliable. It is understandable that the edge of the support portion 501 can also be bent to form a flange 507 to increase the strength of the support portion 501.

[0047] There is a set angle between the plane where the support part 501 is located and the plane where the fitting part is located. In this embodiment, the support part 501 is perpendicular to the fitting part, and the side of the exhaust hood 400 can fit against the inner wall of the box 300, saving space and making the exhaust hood 400 more stable.

[0048] A reinforcing rib 502 is provided between the support part 501 and the fitting part, so that the support part 501 will not bend relative to the fitting part, and the overall shape of the fastener 500 is more stable, eliminating safety hazards.

[0049] The specific shape of the bonding part is not limited. In this embodiment, the bonding part includes a bonding body 503 and a fixing plate 504. The bonding body 503 is located in the extending direction of the support part 501, and the fixing plate 504 is located outside the extending direction of the support part 501. That is, the bonding body 503 and the fixing plate 504 form an L-shaped structure, which increases the contact area between the bonding part and the inner wall of the housing 300. The force transmitted from the support part 501 can be distributed to the bonding body 503 and the fixing plate 504, improving the load-bearing capacity of the fastener 500 and making it safer to use.

[0050] The fixing plate 504 has an elongated hole 505. Bolts and other connecting parts can be passed through the elongated hole 505 to fix the fixing plate 504 to the inner wall of the housing 300, making disassembly and assembly more convenient. The vertical dimension of the elongated hole 505 is larger than the horizontal dimension, and the position of the connecting parts in the elongated hole 505 can be adjusted according to the required height of the fume hood 400, making the installation of the fume hood 400 more convenient.

[0051] Based on the above structure, the gas water heater also includes a gas distributor, a fan, a water flow sensor, and a proportional valve. The structure and installation position of the above devices are the same as those in the prior art, and will not be described in detail here.

[0052] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Heat exchanger for gas water heaters, characterized in that, include: Heat exchanger assembly (1) is used to heat low-temperature water to a set temperature; Water pipe assembly, including an inlet pipe (21) and an outlet pipe (22); and, The heat exchange flow pipe assembly includes an inlet bend (31), an outlet bend (32), and a relay bend (33). One end of the inlet bend (31) is connected to the inlet pipe (21), and the other end of the inlet bend (31) is connected to the heat exchange plate assembly (1). One end of the outlet bend (32) is connected to the outlet pipe (22), and the other end of the outlet bend (32) is connected to the heat exchange plate assembly (1). Both ends of the relay bend (33) are connected to the heat exchange plate assembly (1). The bending radius of the relay bend (33) is smaller than that of the inlet bend (31), and / or the bending radius of the relay bend (33) is smaller than that of the outlet bend (32).

2. The heat exchanger for a gas water heater according to claim 1, wherein The water pipe assembly also includes a water outlet connector (23) connected to the water outlet pipe (22). The water outlet connector (23) includes a connecting seat (231) connected to the water outlet pipe (22), a mounting seat (232) connected to the connecting seat (231), and a connector body (233). The connecting seat (231) and the mounting seat (232) are respectively disposed on the connector body (233). A water outlet through hole (234) is provided on the mounting seat (232). The extension direction of the pipe inside the connecting seat (231) and the extension direction of the water outlet through hole (234) form a set angle.

3. The heat exchanger for a gas water heater according to claim 2, wherein The water outlet connector (23) also includes a flange (235), on which a flange through hole (236) for inserting a connector is provided, and the connector body (233) is fixed on the flange (235).

4. The heat exchanger for a gas water heater according to claim 2, wherein The connecting seat (231) can swing relative to the mounting seat (232) to change the included angle between the connecting seat (231) and the water outlet hole (234).

5. The heat exchanger for a gas water heater according to any one of claims 1 to 4, characterized in that, The water pipe assembly also includes a bypass pipe (24), one end of which is connected to the inlet pipe (21) and the other end of which is connected to the outlet pipe (22).

6. The heat exchanger for a gas water heater according to any one of claims 1 to 4, characterized in that, The heat exchanger also includes a frame (4), on the side wall of the frame (4) having a through hole, through which a sleeve (5) is inserted, and the inlet bend (31), the outlet bend (32) and / or the relay bend (33) are respectively inserted in the sleeve (5).

7. The heat exchanger for a gas water heater according to any one of claims 1 to 4, characterized in that, The water pipe assembly also includes an inlet connector (25) connected to the inlet pipe (21). Along the water flow direction, the outer circumferential surface of the inlet connector (25) is provided with at least three annular grooves in sequence. At least two of the annular grooves are fitted with sealing rings, and one of the annular grooves is used to insert a pin connector of the water flow sensor.

8. Gas water heater comprising a burner (200), characterized in that, The gas water heater further includes a heat exchanger (100) for a gas water heater as described in any one of claims 1 to 7, wherein the heat generated by the burner (200) can be exchanged with low-temperature water at the heat exchanger (100).

9. The gas water heater of claim 8, wherein, The gas water heater also includes a housing (300) and a fume hood (400). The fume hood (400) is connected to the inner wall of the housing (300) by a fastener (500). The fastener (500) includes a support part (501) and a fitting part connected to each other. There is a set angle between the plane where the support part (501) is located and the plane where the fitting part is located. A reinforcing rib (502) is provided between the support part (501) and the fitting part. The support part (501) is connected to the surface of the fume hood (400), and the fitting part is connected to the inner wall of the housing (300).

10. The gas water heater of claim 9, wherein, The bonding part includes a bonding body (503) and a fixing plate (504). The fixing plate (504) is located outside the extending direction of the support part (501), and an elongated hole (505) is provided on the fixing plate (504).

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