Indirect heating heat exchange device

Abstract

This invention relates to the field of heat exchanger technology, specifically disclosing an indirect heating heat exchange device, including a combustion chamber, a heat exchange chamber, a burner, and a heat exchanger. The heat exchange chamber is disposed on one side of the combustion chamber in the horizontal direction, the burner is fixed in the combustion chamber, and the heat exchanger is fixed in the heat exchange chamber. An opening communicating between the combustion chamber and the heat exchange chamber is provided on the side wall of the heat exchange chamber near the combustion chamber. This invention can reduce corrosion on the surface of the heat exchanger and dust adhering to the surface of the heat exchanger, thus reducing the impact on the heat exchanger's heat exchange performance.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology for gas-fired heating and hot water boilers and gas-fired water heaters, and in particular to an indirect heating heat exchange device. Background Technology

[0002] Gas-fired heating and hot water boilers, gas water heaters, and gas heaters are widely used in daily life. One of the core components of these devices is the heat exchanger, which transfers the heat generated by the combustion of gas to water or air to achieve the heating function.

[0003] In existing technologies, heat exchangers are typically mounted directly above burners, with the flames from the burners directly heating the heat exchangers. Since heat exchangers are usually made of metal, prolonged direct exposure to flames can easily cause corrosion and damage to their surfaces. Furthermore, dust generated during combustion can easily accumulate on the heat exchanger, affecting its performance and preventing the product from functioning properly. Summary of the Invention

[0004] This invention provides an indirect heating heat exchange device that can reduce corrosion and dust adhering to the surface of the heat exchanger, thereby reducing the impact on the heat exchanger's heat exchange performance.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] An embodiment of the present invention provides an indirect heating heat exchange device, including a combustion chamber, a heat exchange chamber, a burner, and a heat exchanger. The heat exchange chamber is disposed on one side of the combustion chamber in the horizontal direction. The burner is fixed in the combustion chamber, and the heat exchanger is fixed in the heat exchange chamber. An opening communicating between the combustion chamber and the heat exchange chamber is provided on the side wall of the heat exchange chamber near the combustion chamber.

[0007] In some embodiments, the system further includes an end cap, a housing, a partition assembly, and a base, wherein the end cap, housing, and base are sequentially fixedly connected, and the partition assembly is fixed inside the housing; the end cap, housing, and partition assembly enclose a combustion chamber; the base, housing, and partition assembly enclose a heat exchange chamber, or the base and partition assembly enclose a heat exchange chamber; and the opening is provided on the partition assembly.

[0008] In some embodiments, the end cap includes an upper cover and a middle cover, with the burner fixed to the upper cover; the upper cover and the middle cover are fixedly connected, and the middle cover is fixedly connected to the outer shell.

[0009] In some embodiments, the middle cover shell is provided with an end cap hole that penetrates through it, and a first insulation plate is fixed around the burner on the inner side of the upper cover shell, the first insulation plate being inserted into the end cap hole; a second insulation plate is provided on the inner side wall of the middle cover shell.

[0010] In some embodiments, an air inlet seat is fixed to the outer side of the upper cover, and the air inlet seat is provided with an air inlet chamber communicating with the burner.

[0011] In some embodiments, the inner wall of the outer casing is provided with a shell insulation layer; an ignition needle is fixed on the end cap.

[0012] In some embodiments, the partition assembly includes a partition and a third insulation plate that is in close contact with the partition, both the partition and the third insulation plate having openings; the partition abuts against the base and surrounds the base to form a heat exchange cavity.

[0013] In some embodiments, the heat exchanger is connected to an inlet pipe and an outlet pipe, both of which extend outside the heat exchange chamber.

[0014] In some embodiments, the top of the heat exchange chamber is provided with a flue gas passage communicating with the heat exchange chamber; the bottom of the heat exchange chamber is provided with a condensate outlet communicating with the heat exchange chamber.

[0015] In some embodiments, the heat exchanger abuts against the side wall of the heat exchange chamber near the combustion chamber, and the heat exchanger is disposed opposite to the opening.

[0016] The present invention has at least the following beneficial effects: The heat exchange chamber of the present invention is disposed on one side of the combustion chamber in the horizontal direction, the burner is placed in the combustion chamber, and the heat exchanger is fixed in the heat exchange chamber; the heat exchange chamber is provided with an opening connecting the combustion chamber and the heat exchange chamber near the side wall of the combustion chamber; when the burner is working, the fan sends the mixture of gas and air, which has been mixed in a certain proportion, into the burner. The mixture is burned in the combustion chamber and heated to form a hot air flow, which enters the heat exchange chamber through the opening, thereby heating the heat exchanger. Thus, the flame does not directly act on the heat exchanger, but indirectly through the hot air in the heat exchanger for heat exchange, reducing corrosion on the surface of the heat exchanger and dust adhesion on the surface of the heat exchanger, reducing the impact on the performance of the heat exchanger, and extending its service life; due to indirect heating, the hot air can pass through the heat exchanger evenly, making the heat exchange more complete, improving thermal efficiency, and saving energy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an indirect heating heat exchange device according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the structure of the indirect heating heat exchange device shown from another perspective;

[0019] Figure 3 This is a cross-sectional schematic diagram of an indirect heating heat exchange device according to an embodiment of the present invention;

[0020] Figure 4This is an exploded view of an indirect heating heat exchange device according to an embodiment of the present invention.

[0021] The attached figures are labeled as follows:

[0022] Combustion chamber 110, heat exchange chamber 120, burner 130, heat exchanger 140, water inlet pipe 141, water outlet pipe 142, opening 150; end cap 210, upper cover shell 211, middle cover shell 212, first insulation plate 213, end cap hole 214, base 220, exhaust channel 221, condensate outlet 222, sealing port 223, outer shell 230, second insulation plate 231, shell insulation layer 232, partition assembly 240, partition 241, third insulation plate 242, air inlet seat 260, air inlet chamber 261, ignition needle 270. Detailed Implementation

[0023] The present invention is provided below with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0024] In the description of this invention, the use of orientation descriptions, such as up, down, front, back, left, right, etc., to indicate orientation or positional relationships, is based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of describing this invention and simplifying the description, and is 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. Therefore, it should not be construed as a limitation of this invention.

[0025] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0026] Embodiments of the present invention provide an indirect heating heat exchange device, such as... Figure 1-4 As shown, the system includes a combustion chamber 110, a heat exchange chamber 120, a burner 130, and a heat exchanger 140. The heat exchange chamber 120 is located on one side of the combustion chamber 110 in the horizontal direction. Due to the upward characteristic of flames, this arrangement ensures that the flame does not directly affect the heat exchanger 140. The burner 130 is fixed in the combustion chamber 110, and the heat exchanger 140 is fixed in the heat exchange chamber 120, which is formed by the base 220. An opening 150 communicating between the combustion chamber 110 and the heat exchange chamber 120 is provided on the side wall of the heat exchange chamber 120 near the combustion chamber 110.

[0027] In this embodiment of the indirect heating heat exchanger, the fuel gas and air are fully premixed to form a mixed gas. A fan introduces this mixed gas into the burner 130, where it is ignited to form a flame. The flame creates a hot airflow in the combustion chamber 110. This heated airflow enters the heat exchange chamber 120 through the opening 150, thereby heating the heat exchanger 140. Thus, the flame does not directly act on the heat exchanger 140, but rather indirectly heats it through a hot airflow. The heat exchanger 140 is essentially not in contact with the flame, making it difficult to... This reduces metal corrosion and surface corrosion of the heat exchanger 140. Dust generated during combustion is also less likely to accumulate on the heat exchanger 140, thus reducing dust buildup and its impact on performance. Simultaneously, the hot airflow flows evenly through the heat exchanger 140, improving its heat exchange efficiency. Furthermore, the reduced dust on the surface of the heat exchanger 140 prevents blockage of the channels between heat exchangers, ensuring smooth airflow, more complete combustion, and reducing harmful gases such as carbon monoxide produced during combustion.

[0028] In some embodiments, such as Figure 1-4 As shown, the indirect heating heat exchange device also includes an end cap 210, a housing 230, a base 220, and a partition assembly 240. The end cap 210, housing 230, and base 220 are sequentially and fixedly connected, which can be achieved through various methods such as screw fixing and welding. The partition assembly 240 is fixed inside the housing 230.

[0029] There are two possible implementations for the heat exchange cavity 120. In one implementation, the base 220, the outer shell 230, and the partition assembly 240 enclose the heat exchange cavity 120. In another implementation, the partition assembly 240 directly abuts against the base 220, and the base 220 and the partition assembly 240 enclose the heat exchange cavity 120; this structure is simpler. In both implementations, the opening 150 is provided on the partition assembly 240.

[0030] The indirect heating heat exchange device in this embodiment adopts a split structure, which facilitates the placement of the burner 130 in the combustion chamber 110 and the fixing of the heat exchanger 140 in the heat exchange chamber 120, and facilitates overall assembly. The end cap 210, the outer shell 230, and the base 220 constitute the shell of the indirect heating heat exchange device, and the partition assembly 240 separates the combustion chamber 110 and the heat exchange chamber 120.

[0031] Furthermore, the end cap 210 includes an upper cover shell 211 and a middle cover shell 212, which are fixedly connected. Specifically, the upper cover shell 211 and the middle cover shell 212 can be fixed together by various methods such as screw fixing and snap-fit ​​fixing. The middle cover shell 212 is fixedly connected to the outer shell 230, which provides support. The burner 130 is fixed to the upper cover shell 210 and extends towards the side closer to the outer shell 230. In this embodiment, the end cap 210 is also designed as a split structure, which facilitates the fixing of other components to the upper cover shell 211 and the middle cover shell 212.

[0032] Furthermore, the middle cover shell 212 is provided with an end cap hole 214 that penetrates through it. The burner 130 passes through the end cap hole 214 to be inserted into the inner side of the middle cover shell 212. On the inner side of the upper cover shell 211 (the side near the outer shell 230), a first insulation plate 213 is fixed around the burner 130. The first insulation plate 213 can be inserted into the end cap hole 214. The first insulation plate 213 can be made of insulation materials such as insulation cotton to reduce the heat leakage from the end cap hole 214.

[0033] The inner wall of the middle cover shell 212 is provided with a second insulation plate 231. The second insulation plate 231 can be made of insulation materials such as insulation cotton to reduce the heat leakage from the combustion chamber 110.

[0034] The second insulation board 231 can be fitted onto the outside of the first insulation board 213 to reduce the gap between the first insulation board 213 and the second insulation board 231, thereby further improving the insulation effect.

[0035] The upper cover 211 may be provided with a through hole, and the burner 130 may be installed in the through hole. This structure facilitates the extension of the gas pipeline to the outside of the upper cover 211.

[0036] In some embodiments, such as Figure 1-4 As shown, an air inlet seat 260 is fixed on the outer side of the upper cover 210 (the side away from the outer casing 230), and the air inlet seat 260 is provided with an air inlet chamber 261 that communicates with the burner 130. The mixture of gas and air can enter the burner 130 through the air inlet chamber 261 and then be ignited to form a flame.

[0037] In some embodiments, such as Figure 1-4 As shown, the burner 130 can be cylindrical and extend towards the heat exchanger 140. Flame holes can be provided on the circumferential surface of the burner 130. Gas is ejected through the flame holes and ignited by the ignition needle 270 to form a flame. Because the flame holes are located on the circumferential surface of the burner 130, the flame holes do not directly inject gas into the heat exchanger 140 for combustion, thus avoiding direct contact between the flame and the heat exchanger 140.

[0038] In some embodiments, such as Figure 1-4As shown, the inner wall of the outer shell 230 is provided with a shell insulation layer 232. The shell insulation layer 232 can be made of insulation materials such as insulation cotton to reduce the heat leakage from the combustion chamber 110.

[0039] In some embodiments, such as Figure 1-4 As shown, an ignition needle 211 can be fixed to the inside of the end cap 210 for igniting the mixed gas on the burner 130.

[0040] A thermocouple may also be fixed to the inside of the first end cap 210 to detect the temperature of the flame on the burner 130.

[0041] In some embodiments, such as Figure 1-4 As shown, the partition assembly 240 includes a partition 241 and a third insulation plate 242 that is closely attached to the partition 241. Both the partition 241 and the third insulation plate 242 are provided with openings 150. The partition 241 and the third insulation plate 242 not only separate the combustion chamber 110 and the heat exchange chamber 120, but also play a role in heat insulation, so that the heat can be more concentrated to enter the heat exchanger through the openings 150 for heat exchange, thereby enabling the heat exchanger 140 to be more concentrated.

[0042] The partition 241 abuts against the base 220 and surrounds the base 220 to form a heat exchange cavity 120, thus making the formation of the heat exchange cavity 120 simpler.

[0043] In some embodiments, such as Figure 1-4 As shown, the heat exchanger 140 is connected to an inlet pipe 141 and an outlet pipe 142. Cold water from the outside can enter the heat exchanger 140 through the inlet pipe 141, where it is heated. The hot water then flows out through the outlet pipe 142. Both the inlet pipe 141 and the outlet pipe 142 extend out of the heat exchange chamber 120 to facilitate connection to external pipelines.

[0044] In this embodiment, the inner wall of the heat exchange chamber 120 may be provided with two sealing ports 223. The inlet pipe 141 and the outlet pipe 142 pass through the two sealing ports 223 respectively and extend out of the heat exchange chamber 120. A sealing structure such as a sealing ring may be provided inside the sealing port 223 to seal the gap between the inlet pipe 141 and the inner wall of the sealing port 223 and the gap between the outlet pipe 142 and the inner wall of the sealing port 223, thereby reducing the leakage of flue gas.

[0045] The sealing port 223 can be provided on the base 220 of the above embodiment.

[0046] In some embodiments, such as Figure 1-4 As shown, the top of the heat exchange chamber 120 is provided with a flue gas passage 221 that communicates with the heat exchange chamber 120, and the flue gas generated by the combustion of the burner 130 can be discharged through the flue gas passage 221.

[0047] The smoke exhaust duct 221 can be located on top of the base 220 in the above embodiment.

[0048] In some embodiments, such as Figure 1-4 As shown, a condensate drain 222 is provided at the bottom of the base 220, through which the condensate produced by the heat exchanger 140 after combustion can flow out.

[0049] The condensate drain outlet 222 can be located at the bottom of the base 220 in the above embodiment.

[0050] In some embodiments, such as Figure 1-4 As shown, the heat exchanger 140 abuts against the side wall of the heat exchange chamber 120 near the combustion chamber 110, and the heat exchanger 140 is arranged opposite to the opening 150. Thus, the hot airflow flowing into the heat exchange chamber 120 through the opening 150 can heat the heat exchanger 140 immediately, resulting in better heating effect.

[0051] In some embodiments, the heat exchanger 140 may have a single-layer or multi-layer structure. The heat exchange tubes included in the heat exchanger 140 may be flat or circular, and the heat exchanger 140 may be made of copper or stainless steel. The fin spacing of the heat exchanger 140 may be set between 1 and 1.3 mm.

[0052] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the invention; therefore, those skilled in the art should understand that the foregoing description of various embodiments of the invention is for illustrative purposes only, and not for limiting the invention as defined by the appended claims and their equivalents.

Claims

1. A heat exchange device for indirect heating, characterized in that: It includes a combustion chamber, a heat exchange chamber, a burner, and a heat exchanger. The heat exchange chamber is located on one side of the combustion chamber in the horizontal direction. The burner is fixed in the combustion chamber, and the heat exchanger is fixed in the heat exchange chamber. An opening communicating between the combustion chamber and the heat exchange chamber is provided on the side wall of the heat exchange chamber near the combustion chamber. It also includes an end cap, a housing, a partition assembly, and a base, wherein the end cap, housing, and base are sequentially fixedly connected, and the partition assembly is fixed inside the housing; the end cap, housing, and partition assembly enclose and form a combustion chamber; The base, outer shell, and partition assembly enclose a heat exchange cavity, or the base and partition assembly enclose a heat exchange cavity; the opening is provided on the partition assembly; The end cap includes an upper cover shell and a middle cover shell, and the burner is fixed on the upper cover shell; the upper cover shell and the middle cover shell are fixedly connected, and the middle cover shell is fixedly connected to the outer shell; The middle cover shell is provided with an end cap hole that penetrates through it; the inner side of the upper cover shell is fixed with a first insulation plate around the burner, and the first insulation plate is inserted into the end cap hole; the inner side wall of the middle cover shell is provided with a second insulation plate. The partition assembly includes a partition and a third insulation board that is in close contact with the partition. Both the partition and the third insulation board are provided with openings. The partition abuts against the base and surrounds the base to form a heat exchange cavity.

2. The indirect heating heat exchange device according to claim 1, characterized in that: An air inlet seat is fixed to the outside of the upper cover, and the air inlet seat is provided with an air inlet chamber that communicates with the burner.

3. The indirect heating heat exchange device according to claim 1, characterized in that: The inner wall of the outer casing is provided with a shell insulation layer; an ignition needle is fixed on the end cap.

4. The indirect heating heat exchange device according to claim 1, characterized in that: The heat exchanger is connected to an inlet pipe and an outlet pipe, both of which extend outside the heat exchange chamber.

5. The indirect heating heat exchange device according to claim 1, characterized in that: The top of the heat exchange chamber is provided with a flue gas passage communicating with the heat exchange chamber; the bottom of the heat exchange chamber is provided with a condensate outlet communicating with the heat exchange chamber.

6. The indirect heating heat exchange device according to claim 1, characterized in that: The heat exchanger abuts against the side wall of the heat exchange chamber near the combustion chamber, and the heat exchanger is positioned opposite the opening.

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