Combustion heat exchange device and gas water heater

Abstract

The utility model belongs to the technical field of heating, specifically discloses a kind of combustion heat exchange device and gas water heater.The combustion heat exchange device includes heat exchanger and combustion chamber shell.The heat exchanger includes at least one heat dissipation passage;Combustion chamber shell is connected in the below of heat exchanger, the combustion chamber shell includes the shell with four side wall plates, the shell is surrounded and forms combustion chamber, at least one baffle is provided in the combustion chamber, one the baffle and one the side wall plate of the shell form air cooling flow channel, the air cooling flow channel and the heat dissipation passage one-to-one correspondence communication, the flow area of the heat dissipation passage corresponding communication is less than the flow area of the air cooling flow channel.The utility model carries out temperature reduction to combustion chamber shell using air cooling mode, avoid the temperature of combustion chamber shell too high, also avoid the security risk and water leakage phenomenon existing when using coil heat dissipation, guarantee the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to a combustion heat exchange device and a gas water heater. Background Technology

[0002] Gas water heaters are a common and efficient way to supply hot water in modern homes. They use gas as a heat source, heating cold water flowing through a heat exchanger to quickly provide hot water. The heat exchanger and the combustion chamber shell located below it form a combustion heat exchange device. The burner is installed inside the combustion chamber shell and burns within it. The high-temperature flue gas produced rises to the heat exchanger, heating the cold water flowing through it.

[0003] In the prior art, in order to prevent the high-temperature heat energy during combustion from being transferred to the outside of the combustion chamber shell and damaging other components, a coil is usually wound around the combustion chamber shell to reduce the surface temperature of the combustion chamber shell.

[0004] However, when using coils to cool the combustion chamber shell, the coils need to be welded to the outer shell of the combustion chamber during installation. During welding, perforations or incomplete welds can easily occur at the weld points, leading to leaks and affecting product quality and user experience. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a combustion heat exchange device that can effectively solve the problem of water leakage caused by perforation or poor welding at the weld joint between the coil and the combustion chamber shell when the coil is used to cool the combustion chamber shell in the prior art.

[0006] The second technical problem solved by this utility model is to provide a gas water heater that can effectively solve the problem of water leakage caused by perforation or poor welding at the weld joint between the coil and the combustion chamber shell when the existing gas water heater uses a coil to cool the combustion chamber shell.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] Combustion heat exchange device, including:

[0009] A heat exchanger, the heat exchanger including at least one heat dissipation channel;

[0010] A combustion chamber shell is connected below the heat exchanger. The combustion chamber shell includes an outer shell with four side wall plates. The outer shell surrounds and forms a combustion chamber. At least one baffle is provided in the combustion chamber. An air-cooling channel is formed between one of the baffle plates and one of the side wall plates of the outer shell. The air-cooling channel is connected to the heat dissipation channel in a one-to-one correspondence. The flow area of ​​the heat dissipation channel in the corresponding connection is smaller than the flow area of ​​the air-cooling channel.

[0011] Compared with the prior art, the combustion heat exchange device of this utility model has the following advantages:

[0012] This combustion heat exchange device is used in gas water heaters. The burner of the gas water heater burns inside the combustion chamber shell and produces high-temperature flue gas. The high-temperature flue gas flows to the heat exchanger, heating the cold water flowing through the heat exchanger to form hot water. At the same time, outside air flows continuously through the air-cooling channel and heat dissipation channel, thereby continuously cooling the combustion chamber shell and preventing the combustion chamber shell temperature from becoming too high.

[0013] In other words, this combustion heat exchange device eliminates the need for coils in existing technologies by setting up corresponding connected air-cooling channels and heat dissipation channels. It uses air cooling to cool the combustion chamber shell, avoiding excessively high temperatures in the combustion chamber shell and avoiding the safety hazards and water leakage associated with coil heat dissipation, thus ensuring a better user experience.

[0014] Furthermore, since the flow area of ​​the corresponding connected heat dissipation channel is smaller than that of the air-cooled channel, when the air flowing from the air-cooled channel flows into the heat dissipation channel, the flow area suddenly decreases, so the air flow speed increases under the effect of the slit effect, thereby allowing more air to enter the air-cooled channel faster and accelerating the cooling of the combustion chamber shell.

[0015] In one embodiment, the air-cooled flow channel and the heat dissipation channel are connected by a plurality of strip holes that extend horizontally.

[0016] In one embodiment, the heat exchanger includes:

[0017] Heat exchanger body;

[0018] An inner end plate is provided at the first end of the heat exchanger body along its length direction;

[0019] The outer end plate is provided at the first end of the heat exchanger body along its length direction. The inner end plate and the outer end plate are spaced apart and form the heat dissipation channel between them. The heat dissipation channel has a structure with an open upper end and a closed lower end. The strip hole is provided on the outer end plate.

[0020] In one embodiment, at least one of the air-cooled channels includes:

[0021] The vertical guide section extends vertically to guide the airflow in a vertical direction;

[0022] The transverse guide section extends horizontally, with one end connected to the upper end of the vertical guide section and the other end connected to the strip-shaped hole.

[0023] In one embodiment, at least one of the sidewall panels includes:

[0024] A vertical plate segment extends along the vertical direction, and a vertical flow guide segment is formed between the vertical plate segment and the side wall of the partition corresponding to the side wall plate, and the upper side of the vertical plate segment is spaced apart from the strip hole.

[0025] A horizontal section extends along the horizontal direction, and the horizontal guide section is formed between the horizontal section and the top wall of the corresponding partition.

[0026] In one embodiment, the heat exchanger includes:

[0027] Heat exchanger body;

[0028] A heat exchanger side plate extends along the length of the heat exchanger body and is disposed at one end of the width of the heat exchanger body.

[0029] The heat dissipation channel is formed between the upper end of one of the side wall panels of the outer casing and the side panel of the heat exchanger.

[0030] In one embodiment, the heat exchanger side plate is made of metal and is connected to the heat exchange fins of the heat exchanger body.

[0031] In one embodiment, the partition is made of a heat-insulating material.

[0032] In one embodiment, a heat dissipation channel is provided around the heat exchanger, and the number of partitions is four, which are spaced apart from the side wall panels. Each partition and its corresponding side wall panel form an air-cooling flow channel.

[0033] The second technical problem mentioned above is solved by the following technical solution:

[0034] Gas water heaters, including:

[0035] Burner;

[0036] In the aforementioned combustion heat exchange device, the burner is disposed within the combustion chamber.

[0037] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0038] The gas water heater includes the aforementioned combustion heat exchange device. The burner of the gas water heater burns inside the combustion chamber shell and generates high-temperature flue gas. The high-temperature flue gas flows to the heat exchanger, heating the cold water flowing through the heat exchanger to form hot water. At the same time, outside air flows continuously through the air-cooling channel and the heat dissipation channel, thereby continuously cooling the combustion chamber shell and preventing the combustion chamber shell temperature from becoming too high.

[0039] In other words, this combustion heat exchange device eliminates the need for coils in existing technologies by setting up corresponding connected air-cooling channels and heat dissipation channels. It uses air cooling to cool the combustion chamber shell, avoiding excessively high temperatures in the combustion chamber shell and avoiding the safety hazards and water leakage associated with coil heat dissipation, thus ensuring a better user experience.

[0040] Furthermore, since the flow area of ​​the corresponding connected heat dissipation channel is smaller than that of the air-cooled channel, when the air flowing from the air-cooled channel flows into the heat dissipation channel, the flow area suddenly decreases, so the air flow speed increases under the effect of the slit effect, thereby allowing more air to enter the air-cooled channel faster and accelerating the cooling of the combustion chamber shell. Attached Figure Description

[0041] Figure 1 A first-view structural schematic diagram of the combustion heat exchange device provided in an embodiment of this utility model;

[0042] Figure 2 This is an exploded structural diagram of the combustion heat exchange device provided in an embodiment of the present utility model;

[0043] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0044] Figure 4 A second-view structural schematic diagram of the combustion heat exchange device provided in an embodiment of this utility model;

[0045] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0046] Figure 6 This is a partial cross-sectional structural schematic diagram of the combustion heat exchange device provided in an embodiment of the present utility model;

[0047] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0048] Figure 8 An exploded structural diagram of the heat exchanger in the combustion heat exchange device provided in the embodiment of this utility model;

[0049] Figure 9 A schematic diagram of the structure of the outer end plate of the heat exchanger in the combustion heat exchange device provided in this embodiment of the utility model;

[0050] Figure 10 An exploded structural diagram of the combustion chamber shell in the combustion heat exchange device provided in this embodiment of the utility model;

[0051] Figure 11 This is a schematic diagram of the structure of a side wall plate of the combustion chamber shell in the combustion heat exchange device provided in this embodiment of the utility model.

[0052] Label Explanation:

[0053] 10. Inlet pipe; 20. Outlet pipe;

[0054] 1. Heat exchanger; 11. Heat dissipation channel; 12. Heat exchanger body; 121. Heat exchange tube; 122. Heat exchange fin; 123. Mixing pipe; 13. Inner end plate; 14. Outer end plate; 141. Strip hole; 15. Heat exchanger side plate; 151. Side welding rod;

[0055] 2. Combustion chamber shell; 21. Outer shell; 211. Side wall panel; 2111. Vertical plate section; 2112. Horizontal plate section; 212. Narrowing section; 2121. Horizontal baffle; 2122. Vertical baffle; 22. Combustion chamber; 23. Baffle; 24. Air-cooled flow channel; 241. Vertical guide section; 242. Horizontal guide section. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] This embodiment provides a gas water heater.

[0061] Specifically, see Figure 1 and Figure 2 The gas water heater includes a burner (not shown in the figure), an inlet pipe 10, a combustion heat exchange device, and an outlet pipe 20. The combustion heat exchange device is encapsulated inside the outer shell of the gas water heater. The outlet end of the inlet pipe 10 is connected to the inlet of the combustion heat exchange device, and the inlet end of the outlet pipe 20 is connected to the outlet of the combustion heat exchange device. The combustion heat exchange device heats the cold water introduced through the inlet pipe 10 to form hot water. The hot water flows out through the outlet of the combustion heat exchange device and the outlet pipe 20 for user use.

[0062] Specifically, see Figure 1 and Figure 2 In this embodiment, the combustion heat exchange device includes a heat exchanger 1 and a combustion chamber shell 2.

[0063] Specifically, a combustion chamber 22 is provided inside the combustion chamber shell 2, and the burner of the gas water heater is installed in the combustion chamber 22 of the combustion chamber shell 2 and burns inside the combustion chamber 22.

[0064] The heat exchanger 1 is provided with an inlet and an outlet. The outlet end of the inlet pipe 10 is connected to the inlet of the heat exchanger 1, and the inlet end of the outlet pipe 20 is connected to the outlet of the heat exchanger 1.

[0065] The burner burns inside the combustion chamber shell 2 and generates high-temperature flue gas. The high-temperature flue gas rises and passes through the heat exchanger 1, transferring heat to the heat exchanger 1, thereby heating the cold water entering the heat exchanger 1 to form hot water. The hot water finally flows out from the outlet of the heat exchanger 1 and the outlet pipe 20 for user use.

[0066] The structure of heat exchanger 1 will be introduced in the following preliminary manner.

[0067] Specifically, see Figures 1-3 In this embodiment, the heat exchanger 1 includes a heat exchanger body 12, which includes a heat exchange tube 121 and heat exchange fins 122. The heat exchange fins 122 are disposed on the side wall of the heat exchange tube 121. The cold water in the inlet pipe 10 can flow into the heat exchange tube 121. After the high-temperature flue gas generated by the burner passes through the heat exchange fins 122, the heat exchange fins 122 can quickly transfer the heat of the high-temperature flue gas to the heat exchange tube 121, thereby heating the cold water entering the heat exchange tube 121 to form hot water. The hot water finally flows from the outlet of the heat exchange tube 121 into the outlet pipe 20 for user use.

[0068] It is understandable that there are multiple heat exchange fins 122 in order to improve heat exchange efficiency.

[0069] Optionally, the heat exchange tube 121 includes a plurality of U-shaped tubes connected end to end in sequence.

[0070] Further optional, see Figure 1 and Figure 2 The heat exchanger 1 also includes a mixing pipe 123, one end of which is connected to the inlet pipe 10 and the other end is connected to the heat exchange pipe 121, which has the function of reducing the temperature rise when the gas water heater is restarted.

[0071] When the burner burns in the combustion chamber 22 of the combustion chamber shell 2, it generates a lot of heat, which causes the temperature of the combustion chamber shell 2 to be too high. If the temperature of the combustion chamber shell 2 cannot be reduced in time, the heat transferred outward may damage other components.

[0072] In the prior art, in order to reduce the temperature of the combustion chamber shell in a timely manner, a coil is welded to the outside of the combustion chamber shell, and cooling water is circulated in the coil to cool the combustion chamber shell.

[0073] However, the use of coil cooling has the following drawbacks: After the coil is welded to the combustion chamber shell in a brazing furnace, the combustion chamber shell becomes soft and easily deformed, which can cause the flame of the burner's burner to burn into the combustion chamber shell, leading to safety hazards such as excessive flue gas, blackening or burn-through of the combustion chamber shell; in addition, during the welding process between the combustion chamber shell and the coil, perforation or incomplete welding can easily occur at the weld points, which can easily lead to water leakage, affecting product quality and user experience.

[0074] To avoid the above problems, this embodiment adopts a different method from coil heat dissipation to achieve cooling of the combustion chamber shell 2.

[0075] Specifically, see Figures 2-7 In this embodiment, the heat exchanger 1 includes at least one heat dissipation channel 11.

[0076] The combustion chamber shell 2 is connected to the bottom of the heat exchanger 1. The combustion chamber shell 2 includes an outer shell 21 with four side wall plates 211. The outer shell 21 surrounds the combustion chamber 22. At least one baffle 23 is provided in the combustion chamber 22. An air-cooling channel 24 is formed between the baffle 23 and one side wall plate 211 of the outer shell 21. The air-cooling channel 24 is connected to the heat dissipation channel 11 in a one-to-one correspondence.

[0077] Optionally, the combustion chamber shell 2 is connected to the bottom of the heat exchanger 1 by means of screws or bolts or other connecting parts.

[0078] The combustion heat exchange device provided in this embodiment is used in a gas water heater. The burner of the gas water heater burns in the combustion chamber shell 2 and generates high-temperature flue gas. The high-temperature flue gas flows to the heat exchanger 1 and heats the cold water flowing through the heat exchanger 1 to form hot water. At the same time, outside air flows continuously through the air-cooling channel 24 and the heat dissipation channel 11, thereby continuously cooling the combustion chamber shell 2 and preventing the temperature of the combustion chamber shell 2 from becoming too high.

[0079] That is, by setting up corresponding connected air-cooled flow channels 24 and heat dissipation channels 11, the combustion heat exchange device abandons the coil in the existing technology and uses air cooling to cool the combustion chamber shell 2, avoiding the excessive temperature of the combustion chamber shell 2, and also avoiding the safety hazards and water leakage of using coil heat dissipation, thus ensuring the user's experience.

[0080] Specifically, the combustion chamber shell 2 is made of metal. The metal combustion chamber shell 2 has a relatively lower cost, which can reduce costs and increase efficiency.

[0081] In one embodiment, to improve the air-cooling effect, the flow area of ​​the heat dissipation channel 11 is smaller than that of the air-cooling channel 24. With this configuration, when the air flowing from the air-cooling channel 24 flows into the heat dissipation channel 11, the airflow speed increases due to the sudden reduction in flow area and the slit effect, thereby allowing more air to enter the air-cooling channel 24 more quickly and accelerating the cooling of the combustion chamber shell 2.

[0082] In one embodiment, to improve the air-cooling effect and to ensure that the flow area of ​​the heat dissipation channel 11 is smaller than the flow area of ​​the air-cooling channel 24, see [reference needed]. Figure 6 and Figure 7 The air-cooled flow channel 24 and the heat dissipation channel 11 are connected by multiple strip holes 141, which extend horizontally.

[0083] The design of the strip-shaped hole 141 can create a slit effect. When the cooling air flows to the strip-shaped hole 141, the flow area suddenly decreases, so the flow rate of the cooling air will increase, thereby allowing more air to enter the air-cooling channel 24 more quickly and accelerating the cooling of the combustion chamber shell 2.

[0084] Meanwhile, the air-cooled flow channel 24 and the heat dissipation channel 11 are connected by multiple strip holes 141, which also makes the flow area of ​​the heat dissipation channel 11 smaller than the flow area of ​​the air-cooled flow channel 24.

[0085] The arrangement of multiple strip-shaped holes 141 can create a slit effect at each strip-shaped hole 141, further improving the cooling effect on the combustion chamber shell 2.

[0086] Further, see Figure 7 In one embodiment, at least one air-cooled flow channel 24 includes a vertical flow guide section 241 and a horizontal flow guide section 242.

[0087] The vertical guide section 241 extends vertically to guide the airflow in a vertical direction.

[0088] The transverse guide section 242 extends horizontally, with one end connected to the upper end of the vertical guide section 241 and the other end connected to the strip hole 141.

[0089] That is, the transverse guide section 242 is part of the air-cooled flow channel 24. The transverse guide section 242 is connected to the strip hole 141. The setting of the strip hole 141 realizes the design that the flow area of ​​the heat dissipation channel 11 is smaller than the flow area of ​​the air-cooled flow channel 24.

[0090] Further, see Figure 7 In one embodiment, at least one sidewall panel 211 includes a vertical section 2111 and a horizontal section 2112.

[0091] The vertical plate segment 2111 extends in the vertical direction, and a vertical flow guide segment 241 is formed between the vertical plate segment 2111 and the side wall of the partition 23 corresponding to the side wall plate 211. The upper side of the vertical plate segment 2111 is spaced apart from the strip hole 141.

[0092] The horizontal plate segment 2112 extends in the horizontal direction, and a transverse guide segment 242 is formed between the horizontal plate segment 2112 and the top wall of the corresponding partition 23.

[0093] That is, the aforementioned sidewall plate 211 is L-shaped, thereby forming an air-cooled flow channel including a vertical guide section 241 and a horizontal guide section 242.

[0094] Specifically, see Figures 7-9 In one embodiment, the heat exchanger 1 includes a heat exchanger body 12, an inner end plate 13, and an outer end plate 14.

[0095] An inner end plate 13 is provided at the first end of the heat exchanger body 12 along its length.

[0096] An outer end plate 14 is provided at the first end of the heat exchanger body 12 along its length. An inner end plate 13 and an outer end plate 14 are spaced apart and form a heat dissipation channel 11 between them. The heat dissipation channel 11 has a structure with an open upper end and a closed lower end. A strip hole 141 is provided on the outer end plate 14.

[0097] Specifically, see Figure 7 Both the lower end of the inner end plate 13 and the lower end of the outer end plate 14 are provided with bent portions, and the two bent portions are fixedly connected, thereby sealing the lower end of the heat dissipation channel 11.

[0098] That is, a heat dissipation channel 11 is formed between the inner end plate 13 and the outer end plate 14 at the first end of the heat exchanger body 12 along its length, and a strip hole 141 is opened on the outer end plate 14 to improve the cooling effect on the combustion chamber shell 2.

[0099] Specifically, the heat exchange tubes 121 of the heat exchanger body 12 are arranged through the heat exchanger body 12.

[0100] Optionally, an inner end plate 13 and an outer end plate 14 may be provided at the second end of the heat exchanger body 12 along its length to form a heat dissipation channel 11; correspondingly, an air-cooled flow channel 24 corresponding to the heat dissipation channel 11 needs to be provided in the combustion chamber shell 2.

[0101] Further, alternatively, in one embodiment, see [link to relevant documentation]. Figure 4 , Figure 5 and Figure 8 The heat exchanger 1 includes a heat exchanger body 12 and a heat exchanger side plate 15.

[0102] The heat exchanger side plate 15 extends along the length of the heat exchanger body 12 and is disposed at one end of the width of the heat exchanger body 12.

[0103] A heat dissipation channel 11 is formed between the upper end of one side wall plate 211 of the outer casing 21 and the heat exchanger side plate 15.

[0104] That is, the heat dissipation channel 11 can extend along the length of the heat exchanger body 12 or along the width of the heat exchanger body 12, whichever needs to be set.

[0105] Optionally, in one embodiment, the heat exchanger side plate 15 is made of metal and is connected to the heat exchange fins 122 of the heat exchanger body 12.

[0106] Understandably, the air flowing from the air-cooled channel 24 into the heat dissipation channel 11 has a higher temperature than when it first enters the air-cooled channel 24. Since the heat exchanger side plate 15 is made of metal and is connected to the heat exchange fins 122 of the heat exchanger body 12, the air flowing through the heat dissipation channel 11 will transfer heat to the metal heat exchanger side plate 15. The heat exchanger side plate 15 can then transfer the heat to the heat exchange fins 122, increasing the temperature of the heat exchange fins 122, thereby improving the heating efficiency of the heat exchanger 1 for cold water and reducing energy waste.

[0107] Optionally, the heat exchanger side plate 15 is made of copper. The heat exchanger side plate 15 is fixedly connected to the heat exchange fins 122 by welding.

[0108] Alternatively, the heat exchanger side plate 15 is welded to the heat exchange fins 122 by side welding rods 151.

[0109] In one embodiment, the baffle 23 is made of a heat-insulating material. Thus, the baffle 23 can serve as a heat insulator, reducing the amount of heat transferred from the burner during combustion to the outside of the combustion chamber shell 2, reducing energy waste, and preventing the combustion chamber shell 2 from overheating.

[0110] Alternatively, the partition 23 may be made of perlite or aluminum oxide.

[0111] Further, alternatively, in one embodiment, see [link to relevant documentation]. Figure 10 There are four baffles 23, that is, a baffle 23 is provided on the inner side of each of the four side wall plates 211 of the combustion chamber shell 2.

[0112] Specifically, the burner burns within the space formed by the four baffles 23 to fully reduce the heat generated during combustion that is transferred to the outside of the combustion chamber shell 2.

[0113] Optionally, in one embodiment, a heat dissipation channel 11 is provided around the heat exchanger 1, and four partitions 23 are provided and spaced apart from the side wall plates 211. Each partition 23 and its corresponding side wall plate 211 form an air-cooling flow channel 24.

[0114] Optionally, the gap size of the air-cooled flow channel 24 is 1mm-4mm.

[0115] The four air-cooling channels 24 and the four heat dissipation channels 11 are connected in a one-to-one correspondence, which fully cools down the four side wall plates 211 of the combustion chamber shell 2.

[0116] For example, with Figure 4 and Figure 5Taking the orientation shown as an example, a heat dissipation channel 11 is provided at both ends of the heat exchanger body 12 along its length. Specifically, the heat dissipation channel 11 is formed by an inner end plate 13 and an outer end plate 14 spaced apart. Correspondingly, an air-cooled flow channel 24 is also provided at both ends of the combustion chamber shell 2 along the length of the heat exchanger body 12. The air-cooled flow channel 24 includes a vertical guide section 241 and a horizontal guide section 242. The air-cooled flow channel 24 and the heat dissipation channel 11 located at the same end are connected in a one-to-one correspondence. The flow area of ​​the heat dissipation channel 11 formed between the inner end plate 13 and the outer end plate 14 is smaller than that of the air-cooled flow channel 24 formed by the partition plate 23 and the side wall plate 211.

[0117] A heat dissipation channel 11 is also provided at both ends of the heat exchanger body 12 in the width direction; specifically, the heat dissipation channel 11 is formed by the upper ends of the heat exchanger side plate 15 and the side wall plate 211 extending along its own length direction of the combustion chamber shell 2, which are arranged at intervals. Correspondingly, an air-cooled flow channel 24 is also provided at both ends of the combustion chamber shell 2 along the width direction of the heat exchanger body 12, and the air-cooled flow channel 24 and the heat dissipation channel 11 located at the same end are connected in a one-to-one correspondence. For details, see [link to documentation]. Figure 10 and Figure 11 To ensure proper airflow in the heat dissipation channel 11, its area is smaller than that of the air-cooled flow channel 24. The side wall plate 211 extending along the length of the combustion chamber shell 2 includes a side wall plate body. A narrowing portion 212 is provided at the upper end of the side wall plate body. The narrowing portion 212 includes a transverse baffle 2121 and a vertical baffle 2122. The transverse baffle 2121 is vertically positioned at the upper end of the side wall plate body, with its free end close to the partition plate 23. The vertical baffle 2122 forms an angle with the transverse baffle 2121, creating a heat dissipation channel 11 between the vertical baffle 2122 and the heat exchanger side plate 15. Optionally, the angle between the vertical baffle 2122 and the transverse baffle 2121 is a right angle or an obtuse angle.

[0118] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0119] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A combustion heat exchange device, characterized in that, include: A heat exchanger (1) includes at least one heat dissipation channel (11); A combustion chamber shell (2) is connected below the heat exchanger (1). The combustion chamber shell (2) includes an outer shell (21) with four side wall plates (211). The outer shell (21) surrounds and forms a combustion chamber (22). At least one partition (23) is provided in the combustion chamber (22). An air-cooled flow channel (24) is formed between one of the partitions (23) and one of the side wall plates (211) of the outer shell (21). The air-cooled flow channel (24) is connected to the heat dissipation channel (11) in a one-to-one correspondence. The flow area of ​​the heat dissipation channel (11) is smaller than the flow area of ​​the air-cooled flow channel (24).

2. The combustion heat exchange device according to claim 1, characterized in that, The air-cooled flow channel (24) and the heat dissipation channel (11) are connected by a plurality of strip holes (141) that extend horizontally.

3. The combustion heat exchange device according to claim 2, characterized in that, The heat exchanger (1) includes: Heat exchanger body (12); Inner end plate (13): The first end of the heat exchanger body (12) in the length direction is provided with the inner end plate (13); The outer end plate (14) is provided at the first end of the heat exchanger body (12) along its length direction. The inner end plate (13) and the outer end plate (14) are spaced apart and form the heat dissipation channel (11) between them. The heat dissipation channel (11) has a structure with an open upper end and a closed lower end. The strip hole (141) is provided on the outer end plate (14).

4. The combustion heat exchange device according to claim 2, characterized in that, At least one of the air-cooled flow channels (24) includes: The vertical guide section (241) extends vertically to guide the airflow in the vertical direction; The transverse guide section (242) extends horizontally, with one end connected to the upper end of the vertical guide section (241) and the other end connected to the strip hole (141).

5. The combustion heat exchange device according to claim 4, characterized in that, At least one of the sidewall panels (211) comprises: A vertical plate segment (2111) extends along the vertical direction, and a vertical flow guide segment (241) is formed between the vertical plate segment (2111) and the side wall of the partition (23) corresponding to the side wall plate (211), and the upper side of the vertical plate segment (2111) is spaced apart from the strip hole (141); A horizontal section (2112) extends along the horizontal direction, and a transverse guide section (242) is formed between the horizontal section (2112) and the top wall of the corresponding partition (23).

6. The combustion heat exchange device according to claim 1, characterized in that, The heat exchanger (1) includes: Heat exchanger body (12); The heat exchanger side plate (15) extends along the length direction of the heat exchanger body (12) and is disposed at one end of the width direction of the heat exchanger body (12); The heat dissipation channel (11) is formed between the upper end of one of the side wall panels (211) of the outer casing (21) and the heat exchanger side panel (15).

7. The combustion heat exchange device according to claim 6, characterized in that, The heat exchanger side plate (15) is made of metal and is connected to the heat exchange fins (122) of the heat exchanger body (12).

8. The combustion heat exchange device according to claim 1, characterized in that, The partition (23) is made of heat-insulating material.

9. The combustion heat exchange device according to any one of claims 1-8, characterized in that, The heat exchanger (1) is provided with a heat dissipation channel (11) around its perimeter. There are four partitions (23) and they are arranged one-to-one with the side wall plates (211). Each partition (23) and its corresponding side wall plate (211) form an air-cooling channel (24).

10. A gas-fired water heater, characterized in that, include: Burner; The combustion heat exchange device according to any one of claims 1-9, wherein the burner is disposed in the combustion chamber (22).

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