A high-efficiency heat exchanger of a gas water heater with a porous gradient structure

Abstract

The utility model provides a kind of high-efficiency heat exchanger of gas water heater of porous gradient structure, including hollow exchanger shell;Exchanger shell bottom end is provided for installing the mounting portion of burner, and the mounting portion bottom end and exchanger shell top end are provided with connecting flaps, and exchanger shell top is further provided with the smoke guide cover of the smoke pipe, and the connecting flap of smoke guide cover and exchanger shell is connected by multiple groups of screws;The opposite limit portion is arranged on the opposite inner side surface of exchanger shell, and exchanger body is arranged in exchanger shell, and exchanger body bottom end is in contact with limit portion;Exchanger body and exchanger shell are all coiled with the same group of coil pipe in it.Exchanger body is connected with multiple groups of equidistance layered heat exchange sheet by connecting plate, and heat exchange sheet is provided with flow guide hole, and the aperture is large at top and small at bottom.Coil pipe is in contact with heat exchange sheet through mounting hole, increases heat transfer area, guides flue gas flow, strengthens heat conduction, improves efficiency, accelerates cold water temperature rise, shortens waiting time.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas water heaters, and more specifically, it relates to a high-efficiency heat exchanger for gas water heaters with a porous gradient structure. Background Technology

[0002] The heat exchanger of a gas water heater connects the combustion and water circuit systems. It receives heat from the high-temperature flue gas of the gas combustion and transfers it to the internal cold water through the metal heat transfer surface. The cold water heats up to achieve heat exchange, quickly conducts heat to improve thermal efficiency, and is also resistant to high-temperature flue gas corrosion and water flow impact to maintain stable system operation. It determines the heating speed, energy efficiency and service life of the water heater.

[0003] Currently, most heat exchangers are made of oxygen-free copper. Oxygen-free copper has good thermal and electrical conductivity, but copper resources are scarce and expensive, resulting in high production costs for copper heat exchangers. Therefore, copper can be replaced with stainless steel. Stainless steel has a wide range of raw material sources, such as abundant reserves of iron ore, and low acquisition costs. Using it to manufacture heat exchangers can reduce the overall production cost of gas water heaters.

[0004] However, stainless steel has a low thermal conductivity, so when it is used to make heat exchangers, heat transfer takes longer. When cold water flows through it, the rate at which it absorbs heat is limited, and the rate of temperature rise is significantly reduced. This directly leads to a longer waiting time for hot water after the user turns on the water heater, which in turn affects the user experience. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a high-efficiency heat exchanger for gas water heaters with a porous gradient structure. This solves the technical problem in the prior art where the low thermal conductivity of stainless steel heat exchangers leads to slow heat transfer, reduced water heating rate, prolonged waiting time for hot water, and negatively impacts the user experience.

[0006] The purpose and effectiveness of this utility model's porous gradient structure high-efficiency heat exchanger for gas water heaters are achieved through the following specific technical means:

[0007] A high-efficiency heat exchanger for a gas water heater with a porous gradient structure includes a hollow heat exchanger shell. The bottom of the heat exchanger shell has a mounting portion for mounting a burner. Both the bottom of the mounting portion and the top of the heat exchanger shell have connecting baffles. The top of the heat exchanger shell also has a smoke guide hood with a flue pipe. The smoke guide hood is connected to the connecting baffles of the heat exchanger shell by multiple sets of screws. Limiting portions are provided on two opposite inner surfaces of the heat exchanger shell. A heat exchanger body passes through the heat exchanger shell, with the bottom of the heat exchanger body contacting the limiting portions. The same set of coiled tubes is wound around both the heat exchanger body and the heat exchanger shell.

[0008] The above technical solution further includes that the heat exchanger body includes multiple sets of heat exchange plates, the multiple sets of heat exchange plates are equidistant layered structures, and connecting plates for connecting the multiple sets of heat exchange plates are arranged opposite each other on both sides of the multiple sets of heat exchange plates, and the bottom end of the connecting plate contacts the limiting part.

[0009] The above technical solution further includes that multiple sets of flow guide holes are uniformly opened on the multiple sets of heat exchange plates, and the diameter of each set of flow guide holes increases in a stepped manner from bottom to top.

[0010] The above technical solution further includes that multiple sets of the heat exchange plates and the connecting plate are provided with multiple sets of mounting holes that are transversely opened corresponding to the coil, the coil is inserted into the multiple sets of mounting holes, and the outer side of the coil is in contact with the multiple sets of heat exchange plates.

[0011] The above technical solution further includes that the two ends of the coil are respectively provided with mounting parts for connecting the inlet pipe and the outlet pipe.

[0012] The above technical solution further includes that the smoke hood, the heat exchanger housing, and the heat exchanger body are all made of stainless steel.

[0013] The above technical solution further includes that the inner side of the exchanger housing and the exchanger body are coated with an anti-oxidation ceramic coating.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The heat exchanger body is equipped with multiple sets of equidistant layered heat exchange fins, connected on both sides by connecting plates. The heat exchange fins have multiple sets of guide holes, with the hole diameter increasing in a stepped manner from bottom to top. The coil passes through the mounting holes of the heat exchange fins and connecting plates, making contact with the heat exchange fins. This structure increases the heat transfer area, the guide holes guide the flow of flue gas, improve heat transfer efficiency, accelerate the heating rate of chilled water, and shorten the user's waiting time. The close contact between the coil and the heat exchange fins enhances heat conduction, ensuring that heat is fully transferred to the chilled water and improving the heat exchanger's operating efficiency.

[0016] 2. The smoke hood, heat exchanger housing, and heat exchanger body are made of stainless steel, reducing raw material costs. The inner surface of the heat exchanger housing and the heat exchanger body are coated with an anti-oxidation ceramic coating to enhance resistance to high-temperature flue gas corrosion. The stainless steel material is resistant to water flow impact, and the ceramic coating reduces oxidation loss, extending the service life of the heat exchanger. The overall structure is fixed by components such as limiting parts and connecting baffles to ensure operational stability and maintain long-term high-efficiency operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the assembled structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the exchanger housing and the exchanger body after assembly.

[0019] Figure 3 This is a schematic diagram of the main body of the switch of this utility model.

[0020] Figure 4 This is a cross-sectional view of the exchanger housing of this utility model.

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1. Heat exchanger housing; 2. Smoke hood; 3. Heat exchanger body; 4. Coil; 101. Mounting part; 102. Baffle plate; 201. Heat exchange plate; 202. Connecting plate; 301. Flow guide hole; 401. Mounting hole; 501. Mounting component. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solution of this utility model, but should not be used to limit the scope of protection of this utility model.

[0024] Example:

[0025] like Figures 1 to 4 As shown, this utility model provides a high-efficiency heat exchanger for a gas water heater with a porous gradient structure. It includes a hollow heat exchanger shell 1, a mounting part 101 for mounting a burner at the bottom of the shell 1, and connecting baffles 102 at both the bottom of the mounting part 101 and the top of the shell 1. A smoke guide hood 2 with a flue pipe is also provided at the top of the shell 1. The smoke guide hood 2 is connected to the connecting baffles 102 of the shell 1 by multiple sets of screws. Limiting parts are provided on two opposite inner surfaces of the shell 1. A heat exchanger body 3 passes through the shell 1, with its bottom contacting the limiting parts. The same set of coiled tubes 4 are coiled and passed through both the heat exchanger body 3 and the shell 1. The mounting part 101 at the bottom of the shell 1 allows for the mounting of a burner, enabling the heat generated by combustion to directly act on the internal components of the shell, thus improving heat utilization efficiency. The bottom of the mounting section 101 is connected to the top of the heat exchanger housing 1 by a connecting baffle 102. The smoke hood 2 is connected to the connecting baffle 102 by screws, achieving a stable assembly between the smoke hood 2 and the heat exchanger housing 1, ensuring a sealed flue gas flow path and preventing flue gas leakage. The smoke hood 2 has a flue gas outlet pipe that can directionally discharge the flue gas after heat exchange, preventing the flue gas from stagnating in the housing and affecting heat exchange.

[0026] Limiting parts are provided on two opposite inner sides of the heat exchanger housing 1. The heat exchanger body 3 passes through the housing and its bottom end contacts the limiting parts. The limiting parts provide support and positioning for the heat exchanger body 3, ensuring its stable position within the housing and preventing displacement due to vibration during operation, thus ensuring continuous and stable heat exchange. The heat exchanger body 3 and the heat exchanger housing 1 are wound together with the same set of coils 4, so that the coils 4 are in contact with both simultaneously, increasing the heat-receiving area of ​​the coils 4. This allows the cold water to fully absorb heat when flowing within the coils 4, accelerating the heating rate.

[0027] The overall structure, through the cooperation of components such as the mounting part 101, connecting baffle 102, and limiting part, achieves the orderly assembly of the burner, flue hood 2, heat exchanger body 3, and coil 4. The positions of each component are relatively fixed, forming a complete heat exchange system. The screw connection method facilitates the disassembly and assembly of components, making later maintenance and replacement easier. The coiled structure of the coil 4 increases the flow path length of cold water within the shell, prolonging the heat exchange time, improving the adequacy of heat exchange, and ensuring the effectiveness of hot water supply.

[0028] The smoke hood 2, the heat exchanger housing 1, and the heat exchanger body 3 are all made of stainless steel. The inner surface of the heat exchanger housing 1 and the heat exchanger body 3 are coated with an anti-oxidation ceramic coating. Stainless steel possesses excellent mechanical properties, can withstand the high-temperature environment generated by gas combustion, and maintains structural stability. Furthermore, stainless steel is widely available and has a low cost, which can reduce the overall manufacturing cost of the heat exchanger, making it suitable for large-scale production applications.

[0029] The inner surface of the heat exchanger housing 1 and the heat exchanger body 3 are coated with an anti-oxidation ceramic coating. This ceramic coating possesses excellent high-temperature resistance and oxidation resistance, preventing direct contact between high-temperature flue gas and the stainless steel surface, reducing oxidation reactions at high temperatures, and slowing down component aging. The stainless steel material, combined with the ceramic coating, provides structural support while the ceramic coating enhances surface protection, jointly improving the durability of the heat exchanger and extending its service life. Simultaneously, it prevents functional failures caused by component corrosion, ensuring long-term stable operation of the heat exchanger.

[0030] like Figures 2 to 3As shown, the heat exchanger body 3 includes multiple sets of heat exchange plates 201, which are equidistantly layered. Connecting plates 202 are arranged on opposite sides of each heat exchange plate 201 to connect them, with the bottom of the connecting plates 202 contacting the limiting part. Multiple sets of guide holes 301 are evenly distributed on each heat exchange plate 201, with the diameter of each set of guide holes increasing in a stepped manner from bottom to top. The heat exchanger body 3, containing multiple sets of heat exchange plates 201 in an equidistant layered structure, increases the contact area with high-temperature flue gas, prolongs the contact time, and improves heat absorption efficiency. The layered arrangement makes the flue gas flow path more regular, avoids local heat concentration, ensures heat exchange uniformity, and facilitates sufficient heat absorption by cold water. The connecting plates 202 on both sides of the multiple sets of heat exchange plates 201 connect and fix them, forming an integral structure and enhancing stability. The bottom end of the connecting plate 202 contacts the limiting part. With the support of the limiting part, the position of the heat exchanger body 3 inside the heat exchanger housing 1 is fixed to prevent displacement due to vibration during operation and to ensure the stability of the heat exchange process.

[0031] The heat exchange plate 201 has multiple sets of guide holes 301 to guide the flow of flue gas and prevent it from stagnating. The diameter of the guide holes 301 increases in a stepped manner from bottom to top to adapt to temperature changes during flue gas flow. The smaller holes at the bottom enhance flue gas turbulence and improve the heat exchange efficiency at the bottom, while the larger holes at the top reduce flue gas flow resistance and ensure smooth exhaust of flue gas, thus optimizing the overall heat transfer effect.

[0032] Multiple sets of mounting holes 401 are horizontally provided on the heat exchange plates 201 and connecting plates 202 corresponding to the coil 4. The coil 4 passes through the mounting holes 401, and its outer surface contacts the heat exchange plates 201. The mounting holes 401 on the heat exchange plates 201 and connecting plates 202 allow the coil 4 to pass through, enabling the coil 4 to be assembled with both, fixing the position of the coil 4, preventing displacement during operation, and ensuring structural stability. The contact between the outer surface of the coil 4 and the heat exchange plates 201 increases the contact area, facilitating the transfer of heat absorbed by the heat exchange plates 201 to the coil 4, improving heat conduction efficiency, and accelerating the heating of the cold water inside the coil 4. The horizontally provided mounting holes 401 allow the coil 4 to be arranged orderly between the heat exchange plates 201 and connecting plates 202, optimizing space utilization, ensuring full contact between the coil 4 and the multiple sets of heat exchange plates 201, and ensuring uniform heat transfer.

[0033] like Figures 1 to 2As shown, mounting components 501 for connecting inlet and outlet water pipes are respectively provided at both ends of the coil 4. The mounting components 501 at both ends of the coil 4 connect the coil 4 to the inlet and outlet water pipes, establishing a channel for cold water to flow in and hot water to flow out, ensuring smooth water circulation. The mounting components 501 make it easier to connect the coil 4 to external pipes, facilitating quick assembly and improving installation efficiency. Furthermore, the connection through the mounting components 501 ensures a tight connection between the coil 4 and the inlet and outlet water pipes, reducing the risk of leakage and ensuring the airtightness of the heat exchanger water system.

[0034] The above description is merely an embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-efficiency heat exchanger for a gas water heater with a porous gradient structure, comprising a hollow exchanger shell (1), characterized in that: The bottom end of the heat exchanger housing (1) is provided with a mounting part (101) for mounting the burner. The bottom end of the mounting part (101) and the top end of the heat exchanger housing (1) are both provided with connecting baffles (102). The top of the heat exchanger housing (1) is also provided with a smoke guide hood (2) with a smoke outlet pipe. The smoke guide hood (2) and the connecting baffles (102) of the heat exchanger housing (1) are connected by multiple sets of screws. Limiting portions are provided on two opposing inner surfaces of the exchanger housing (1), and an exchanger body (3) is inserted inside the exchanger housing (1), with the bottom end of the exchanger body (3) in contact with the limiting portions. The same set of coils (4) are coiled inside both the main body (3) and the housing (1) of the exchanger.

2. The high-efficiency heat exchanger for a gas water heater with a porous gradient structure according to claim 1, characterized in that: The heat exchanger body (3) includes multiple sets of heat exchange plates (201), which are equidistant layered structures. Connecting plates (202) for connecting the multiple sets of heat exchange plates (201) are provided on opposite sides of each set of heat exchange plates (201), and the bottom end of the connecting plate (202) contacts the limiting part.

3. The high-efficiency heat exchanger for a gas water heater with a porous gradient structure according to claim 2, characterized in that: Multiple sets of flow guide holes (301) are uniformly opened on the multiple sets of heat exchange plates (201), and the diameter of each set of flow guide holes (301) increases in a step-like manner from bottom to top.

4. The high-efficiency heat exchanger for a gas water heater with a porous gradient structure according to claim 3, characterized in that: Multiple sets of mounting holes (401) are opened horizontally through the multiple sets of heat exchange plates (201) and the connecting plate (202) corresponding to the coil (4). The coil (4) is inserted into the multiple sets of mounting holes (401) and the outer side of the coil (4) is in contact with the multiple sets of heat exchange plates (201).

5. The high-efficiency heat exchanger for a gas water heater with a porous gradient structure according to claim 4, characterized in that: The coil (4) is provided with mounting parts (501) for connecting the inlet pipe and the outlet pipe at both ends.

6. The high-efficiency heat exchanger for a gas water heater with a porous gradient structure according to claim 1, characterized in that: The smoke hood (2), the exchanger housing (1), and the exchanger body (3) are all made of stainless steel.

7. The high-efficiency heat exchanger for a gas water heater with a porous gradient structure according to claim 6, characterized in that: The inner side of the exchanger housing (1) and the exchanger body (3) are both coated with an anti-oxidation ceramic coating.

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