Combustion chamber components and gas water heaters

Abstract

This utility model relates to the field of household appliance technology and discloses a combustion chamber assembly and a gas water heater. The combustion chamber assembly of this utility model includes: a combustion chamber body, comprising an inlet wall and an outlet wall arranged opposite to each other; the inlet wall has an inlet port and an inlet chamber connected in sequence, and the outlet wall has an outlet chamber and an outlet connected in sequence; and multiple water-cooled pipes located on at least one side of the combustion chamber body, with the inlet end of each water-cooled pipe connected to the inlet chamber and the outlet end connected to the outlet chamber, enabling heat exchange between the water-cooled pipes and the combustion chamber body. During use, the combustion chamber assembly of this utility model allows multiple water-cooled pipes to simultaneously carry water, each extending from the inlet wall to the outlet wall. This increases the water flow area of ​​the water-cooled pipes and shortens their flow path, significantly reducing water resistance and preventing problems such as abnormal water system pressure, slow water flow, insufficient water volume, or even dry burning caused by excessive water resistance.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a combustion chamber assembly and a gas water heater. Background Technology

[0002] The combustion chamber assembly of a gas water heater is one of its core components. Its main function is to provide a closed space for the safe and efficient combustion of gas and to transfer the heat generated by combustion to the heat exchanger through which it flows, thereby heating the cold water.

[0003] In related technologies, the combustion chamber assembly includes a combustion chamber body and a water-cooled coil surrounding the combustion chamber body. The high-temperature flue gas generated by the burner during combustion can exchange heat with the water-cooled coil, thereby heating the water-cooled coil. However, the water-cooled coil is relatively long and has high water resistance, which can easily cause abnormal pressure in the water system of the gas water heater, resulting in slow water output, insufficient water flow, or even the risk of dry burning. Utility Model Content

[0004] In view of this, the present invention provides a combustion chamber assembly and a gas water heater to solve the problems in the related art where the water cooling coil of the combustion chamber assembly is too long and has high water resistance, which easily causes abnormal pressure in the water circuit system of the gas water heater, resulting in slow water output, insufficient water volume, or even the risk of dry burning.

[0005] In a first aspect, this utility model provides a combustion chamber assembly, comprising:

[0006] The combustion chamber body includes an inlet wall and an outlet wall arranged opposite to each other. The inlet wall is provided with an inlet and an inlet chamber connected in sequence, and the outlet wall is provided with an outlet chamber and an outlet connected in sequence.

[0007] Multiple water-cooled pipes are located on at least one side of the combustion chamber body. The inlet end of the water-cooled pipe is connected to the inlet chamber, and the outlet end of the water-cooled pipe is connected to the outlet chamber. The water-cooled pipes can exchange heat with the combustion chamber body.

[0008] Beneficial effects: In the combustion chamber assembly of this embodiment, during use, cooling water enters the inlet wall through the inlet pipe, is distributed to multiple water-cooled pipes by the inlet wall, absorbs heat from the combustion chamber assembly, and then flows into the outlet wall. Finally, the heat absorbed by the water is transferred to the next heat exchange device, such as the main heat exchanger, through the outlet. Under the action of water flow, the heat of the flame is basically not transferred to the periphery of the combustion chamber body, resulting in very small heat loss.

[0009] Because multiple water-cooling pipes can be circulated simultaneously, each water-cooling pipe extends from the inlet wall to the outlet wall, thereby increasing the water flow area of ​​the water-cooling pipes and shortening the water flow path. This greatly reduces water resistance and avoids problems such as abnormal water system pressure, slow water output, insufficient water volume, or even dry burning caused by excessive water resistance.

[0010] In one optional embodiment, the water inlet chamber includes a first section and a second section. The first section is connected to the water inlet, and the second section is connected to the first section and the water cooling pipe. The second section is arranged around the outer periphery of the first section.

[0011] Beneficial effects: During the use of the combustion chamber assembly, cooling water can enter the water-cooling pipe sequentially through the inlet, the first chamber section, and the second chamber section. The second chamber section is arranged around the first chamber section. With this arrangement, the flow area of ​​the water flow along the flow path of the cooling water hardly changes, thereby reducing water resistance and avoiding the impact of changes in the flow pattern on the inlet chamber, which helps to strengthen the inlet chamber's ability to withstand water pressure.

[0012] In one optional embodiment, the water inlet wall includes a first side plate and a second side plate disposed opposite to each other. The water inlet is disposed on the first side plate, and the water cooling pipe is connected to the second side plate. The first side plate is provided with a first protrusion and a first groove. The first protrusion protrudes in a direction away from the second side plate, and the first groove is disposed in the middle of the first protrusion and recessed towards the second side plate. The second side plate is provided with a second groove, which is disposed at the corresponding position of the first groove and recessed in a direction away from the first side plate. A first cavity is disposed between the first groove and the second groove, and a second cavity is disposed between the first protrusion and the second side plate.

[0013] Beneficial effects: With this configuration, the cooperation of the first groove, the first protrusion and the second groove can not only form the first cavity and the second cavity in the water inlet wall, but the curved first groove, the first protrusion and the second groove can also increase the structural strength of the first side wall and the second side wall, thereby enhancing the water inlet wall's resistance to water flow impact and helping to extend the service life of the combustion chamber assembly.

[0014] In one alternative embodiment, the first side plate is further provided with a first connecting edge, which surrounds the first protrusion and is used to connect the second side plate.

[0015] In one alternative embodiment, a first connector is provided on the second side plate, through which a water-cooling pipe passes and is connected to the second side plate.

[0016] In one optional embodiment, the water outlet chamber includes a third section and a fourth section. The third section is connected to the water outlet, and the fourth section is connected to the third section and the water cooling pipe. The fourth section is arranged around the outer periphery of the third section.

[0017] Beneficial effects: During the use of the combustion chamber assembly, the cooling water can be output outward sequentially through the water-cooling pipe, the fourth chamber section, the third chamber section and the outlet. Along the flow path of the cooling water, the flow area of ​​the water flow hardly changes, thereby reducing water resistance and avoiding the impact of changes in the flow pattern on the water inlet chamber, which helps to strengthen the water pressure resistance of the water inlet chamber.

[0018] In one optional embodiment, the water outlet wall includes a third side plate and a fourth side plate disposed opposite to each other. A water cooling pipe is connected to the third side plate. The fourth side plate is provided with a second protrusion and a third groove. The water outlet is provided on the fourth side plate. The second protrusion protrudes in a direction away from the third side plate. The third groove is located in the middle of the second protrusion and is recessed in a direction close to the third side plate. The third side plate is provided with a fourth groove. The fourth groove is located at the corresponding position of the third groove and is recessed in a direction away from the third side plate. A third cavity is located between the third groove and the fourth groove. The fourth cavity is located between the second protrusion and the third side plate.

[0019] Beneficial effects: With this configuration, the cooperation of the third groove, the fourth groove, and the second protrusion not only forms the third and fourth cavities in the water inlet wall, but the curved third groove, the fourth groove, and the second protrusion also increase the structural strength of the third and fourth sidewalls, thereby enhancing the water inlet wall's resistance to water flow impact and helping to extend the service life of the combustion chamber components.

[0020] In one alternative embodiment, a second connector is provided on the fourth side plate, through which the water-cooling pipe passes and is connected to the fourth side plate.

[0021] Beneficial effect: This setup makes it easier for operators to use welding materials to connect the water cooling pipe to the fourth side plate.

[0022] In one alternative embodiment, the combustion chamber body further includes:

[0023] A connecting wall is installed between the inlet chamber and the outlet chamber. The connecting walls are installed in pairs, and a combustion chamber is formed between the two connecting walls.

[0024] Beneficial effects: The connecting wall, the inlet wall, and the outlet wall can form a combustion chamber. The high-temperature flue gas during the combustion process of the burner can exchange heat with the water-cooling pipe in the combustion chamber, thereby heating the cooling water. On this basis, the inlet wall, the outlet wall, and the two connecting walls of the combustion chamber assembly in this application embodiment can all exchange heat with the flue gas in the combustion chamber, thereby reducing the loss of heat generated during combustion of the gas inside and transferred to the outside.

[0025] In one alternative embodiment, the water-cooling pipe is located in the combustion chamber, and an arc-shaped groove is provided on the connecting wall, with the water-cooling pipe located within the arc-shaped groove.

[0026] Beneficial effects: With this configuration, the inward-facing side of the water-cooled tube can directly exchange heat with the high-temperature flue gas, while the outward-facing side of the water-cooled tube can make surface contact with the wall of the arc-shaped groove. This increases the heat exchange area between the water-cooled tube and the connecting wall, which helps to improve the heat exchange efficiency between the two.

[0027] In one alternative implementation, the arc length of the arc-shaped groove is less than or equal to half the circumference of the water-cooling pipe.

[0028] Beneficial effect: This design makes it easier for the water cooling tubes to be placed into the curved groove.

[0029] In one optional embodiment, the connecting wall is provided with a pipe channel that extends along the distance between the inlet wall and the outlet wall, and the water-cooling pipe is installed in the pipe channel.

[0030] Beneficial effects: With this setup, the connecting wall can completely enclose the entire water-cooled pipe, so that the entire surface of the water-cooled pipe is in contact with the connecting wall, thereby increasing the heat exchange area between the two.

[0031] In one alternative implementation, the combustion chamber body and / or water cooling pipes are made of stainless steel.

[0032] Beneficial effects:

[0033] The combustion chamber body and copper water pipes of the gas water heater in this embodiment are made of stainless steel. The corrosion resistance of stainless steel effectively reduces the risk of water pipe leakage. Furthermore, the use of stainless steel for water pipes and the combustion chamber body presents a challenge in shaping. In this embodiment, the water cooling pipes are multiple parallel straight pipes instead of a single coil surrounding the combustion chamber body. The combustion chamber body is composed of an inlet wall, an outlet wall, and a connecting wall, eliminating the need for bending during assembly and avoiding the springback and forming resistance inherent in stainless steel processing. This overcomes the shaping difficulties associated with using stainless steel for the combustion chamber body and water pipes.

[0034] In addition, in related technologies, when the burner body and water cooling pipe are made of stainless steel, the stainless steel water cooling coil is wrapped around the combustion chamber body four to five times. Due to the high yield strength and large elastic modulus of stainless steel, the stainless steel water cooling pipe is prone to springback after bending. It is necessary to achieve zero dimensional fit between the combustion chamber body and the water cooling pipe to ensure that the water cooling pipe is in contact with the combustion chamber body.

[0035] The burner body of this embodiment has an arc-shaped groove on its connecting wall, and the water-cooling pipe is located in the arc-shaped groove, which can effectively increase the contact area between the water-cooling pipe and the connecting wall.

[0036] In one alternative embodiment, the combustion chamber assembly further includes heat dissipation fins disposed on the combustion chamber body, the heat dissipation fins being copper fins.

[0037] Beneficial effects: Since the heat transfer coefficient of copper fins is better than that of stainless steel fins, the heat transfer effect of the fins can be guaranteed without having to set the fin volume to be large. This application uses stainless steel combustion chamber body and water cooling pipes in combination with copper fins, which can reduce the risk of water leakage of combustion chamber components while ensuring the heat transfer effect of combustion chamber components.

[0038] Secondly, this utility model also provides a gas water heater, comprising:

[0039] The combustion chamber assembly of the first aspect of this utility model;

[0040] The burner is located below the combustion chamber assembly.

[0041] Beneficial effects: In the gas water heater of this embodiment, during use, cooling water enters the inlet wall through the inlet pipe, is distributed to multiple water-cooled pipes, absorbs heat from the combustion chamber components, and then flows into the outlet wall. Finally, the water transmits the absorbed heat to the next heat exchange device, such as the main heat exchanger, through the outlet. Under the action of the water flow, the heat from the flame is essentially not transferred to the periphery of the combustion chamber body, resulting in minimal heat loss.

[0042] Because multiple water-cooling pipes can be circulated simultaneously, each water-cooling pipe extends from the inlet wall to the outlet wall, thereby increasing the water flow area of ​​the water-cooling pipes and shortening the water flow path. This greatly reduces water resistance and avoids problems such as abnormal water system pressure, slow water output, insufficient water volume, or even dry burning caused by excessive water resistance. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a perspective view of a burner assembly according to an embodiment of the present utility model;

[0045] Figure 2 for Figure 1 The image shows a cross-sectional view of the burner assembly at one angle.

[0046] Figure 3This invention relates to a connecting wall and a water-cooling pipe for a burner assembly according to an embodiment of the present invention.

[0047] Figure 4 This is a front view of the connecting wall and water-cooling pipe of a burner assembly according to an embodiment of the present invention;

[0048] Figure 5 This is a side view of the connecting wall and water cooling pipe of a burner assembly according to an embodiment of the present utility model;

[0049] Figure 6 This is an exploded view of a burner assembly according to an embodiment of the present utility model;

[0050] Figure 7 This is a cross-sectional view of a burner assembly according to an embodiment of the present invention from another angle;

[0051] Figure 8 This is a partial cross-sectional view of a burner assembly according to an embodiment of the present utility model;

[0052] Figure 9 In one embodiment of the present utility model, the first side plate is hidden in order to facilitate the display of the structure of the second side plate;

[0053] Figure 10 This is a schematic diagram of a burner assembly according to an embodiment of the present utility model;

[0054] Figure 11 This is a schematic diagram of a burner assembly according to an embodiment of the present invention from another angle;

[0055] Figure 12 This is a partial cross-sectional view of a burner assembly according to an embodiment of the present utility model. The arrows in the figure indicate the direction of water flow within the inlet wall.

[0056] Figure 13 This is a side sectional view of a burner assembly according to an embodiment of the present utility model. The arrows in the figure indicate the direction of the cooling water flow within the burner assembly.

[0057] Figure 14 This is a side view of another connecting wall of a burner assembly according to an embodiment of the present utility model;

[0058] Figure 15 for Figure 14 A perspective view of the connecting wall of a burner assembly is shown.

[0059] Figure 16 This is a side view of a burner assembly according to an embodiment of the present utility model;

[0060] Figure 17 This is a bottom view of a burner assembly according to an embodiment of the present utility model;

[0061] Figure 18 This is a front view of a burner assembly according to an embodiment of the present invention.

[0062] Explanation of reference numerals in the attached figures:

[0063] 1. Combustion chamber main body;

[0064] 101. Inlet wall; 1011. Inlet; 1012. Inlet chamber; 10121. First chamber section; 10122. Second chamber section;

[0065] 1013, First side plate; 10131, First protrusion; 10132, First groove; 10133, First connecting edge;

[0066] 1014, Second side plate; 10141, Second groove; 10142, First pipe opening;

[0067] 102. Water outlet wall; 1021. Water outlet; 1022. Water outlet chamber; 10221. Third chamber section; 10222. Fourth chamber section;

[0068] 1023, Third side plate; 10231, Second protrusion; 10232, Third groove; 10233, Second connecting edge;

[0069] 1024, Fourth side plate; 10241, Fourth groove; 10242, Second pipe opening;

[0070] 2. Water-cooled pipes;

[0071] 103. Connecting wall; 1031. Arc-shaped groove; 10311. Pipe passage;

[0072] 3. Connector. Detailed Implementation

[0073] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0074] The following is combined with Figures 1 to 18 The following describes embodiments of the present invention.

[0075] According to an embodiment of the present invention, a combustion chamber assembly is provided, including a combustion chamber body 1 and a plurality of water-cooled pipes 2.

[0076] Among them, such as Figure 1 and Figure 7 As shown, the combustion chamber body 1 includes an inlet wall 101 and an outlet wall 102 arranged opposite to each other. The inlet wall 101 is provided with an inlet 1011 and an inlet chamber 1012 connected in sequence, and the outlet wall 102 is provided with an outlet chamber 1022 and an outlet 1021 connected in sequence.

[0077] Multiple water-cooled pipes 2 are located on at least one side of the combustion chamber body 1. The water inlet end of the water-cooled pipe 2 is connected to the water inlet chamber 1012, and the water outlet end of the water-cooled pipe 2 is connected to the water outlet chamber 1022. The water-cooled pipe 2 can exchange heat with the combustion chamber body 1.

[0078] In the combustion chamber assembly of this embodiment, during use, cooling water enters the inlet wall 101 through the inlet pipe, is distributed by the inlet wall 101 to multiple water-cooled pipes 2, absorbs heat from the combustion chamber assembly, and then flows into the outlet wall 102. Finally, the heat absorbed by the water is transferred to the next heat exchange device, such as the main heat exchanger, through the outlet. Under the action of water flow, the heat of the flame is basically not transferred to the periphery of the combustion chamber body, and the heat loss is very small.

[0079] Since multiple water-cooling pipes 2 can be circulated with water at the same time, each water-cooling pipe 2 extends from the inlet wall 101 to the outlet wall 102, thereby increasing the water flow area of ​​the water-cooling pipe 2 and shortening the water flow path of the water-cooling pipe 2. This greatly reduces water resistance and avoids problems such as abnormal water system pressure, slow water output, insufficient water volume, or even dry burning caused by excessive water resistance.

[0080] In one embodiment, such as Figure 7 As shown, the water inlet chamber 1012 includes a first chamber section 10121 and a second chamber section 10122. The first chamber section 10121 is connected to the water inlet 1011, and the second chamber section 10122 is connected to the first chamber section 10121 and the water cooling pipe 2. The second chamber section 10122 is arranged around the outer periphery of the first chamber section 10121.

[0081] During the use of the combustion chamber assembly, cooling water can enter the water-cooling pipe 2 sequentially through the inlet 1011, the first chamber section 10121, and the second chamber section 10122. The second chamber section 10122 is arranged around the first chamber section 10121. With this arrangement, the flow area of ​​the water flow along the flow path of the cooling water hardly changes, thereby reducing water resistance and avoiding the impact of changes in the flow state of the water flow on the inlet chamber 1012, which helps to strengthen the water pressure resistance of the inlet chamber 1012.

[0082] As a possible implementation, in one embodiment not shown in the accompanying drawings, the water inlet chamber 1012 includes a main water inlet and a plurality of water inlet branches connected in sequence. The main water inlet is connected to the water inlet 1011, and the plurality of water inlet branches are connected in parallel to each other, connecting the main water inlet and the water cooling pipe 2.

[0083] In one embodiment, such as Figure 6 , Figure 7 and Figure 8 As shown, the water inlet wall 101 includes a first side plate 1013 and a second side plate 1014 disposed opposite to each other. The water inlet 1011 is disposed on the first side plate 1013, and the water cooling pipe 2 is connected to the second side plate 1014. The first side plate 1013 is provided with a first protrusion 10131 and a first groove 10132. The first protrusion 10131 protrudes away from the second side plate 1014, and the first groove 10132 is disposed in the middle of the first protrusion 10131 and recessed towards the second side plate 1014. The second side plate 1014 is provided with a second groove 10141. The second groove 10141 is disposed at the corresponding position of the first groove 10132 and recessed away from the first side plate 1013. A first cavity section 10121 is disposed between the first groove 10132 and the second groove 10141, and the second cavity section 10122 is disposed between the first protrusion 10131 and the second side plate 1014.

[0084] With this configuration, the cooperation of the first groove 10132, the first protrusion 10131, and the second groove 10141 not only forms the first cavity 10121 and the second cavity 10122 in the water inlet wall 101, but the curved first groove 10132, the first protrusion 10131, and the second groove 10141 also increase the structural strength of the first sidewall and the second sidewall, thereby enhancing the water inlet wall 101's resistance to water flow impact and helping to extend the service life of the combustion chamber assembly.

[0085] In one embodiment, such as Figure 8 As shown, the first side plate 1013 is also provided with a first connecting edge 10133, which surrounds the first protrusion and is used to connect the second side plate 1014.

[0086] In one embodiment, the first connecting edge 10133 is welded to the second side plate 1014.

[0087] This arrangement not only connects the first side plate 1013 to the second side plate 1014, but also helps to improve the sealing of the water inlet chamber 1012.

[0088] As an alternative implementation, in an embodiment not shown in the accompanying drawings, the first side plate 1013 and the second side plate 1014 may also be selected as an adhesive connection or a bolted connection.

[0089] In one embodiment, such as Figure 7 As shown, the water outlet chamber 1022 includes a third section 10221 and a fourth section 10222. The third section 10221 is connected to the water outlet, and the fourth section 10222 is connected to the third section 10221 and the water cooling pipe 2. The fourth section 10222 is arranged around the outer periphery of the third section 10221.

[0090] During the use of the combustion chamber assembly, cooling water can be output outward sequentially through water-cooling pipe 2, fourth chamber section 10222, third chamber section 10221 and outlet 1021. Along the flow path of the cooling water, the flow area of ​​the water flow hardly changes, thereby reducing water resistance and avoiding the impact of changes in the flow state of the water flow on the inlet chamber 1012, which helps to strengthen the water pressure resistance of the inlet chamber 1012.

[0091] As a possible implementation, in one embodiment not shown in the accompanying drawings, the water outlet chamber 1022 includes a water outlet branch and a water outlet main connected in sequence, multiple water outlet branches are connected in parallel to each other, connecting the water outlet main and the water cooling pipe 2, and the water outlet main is connected to the water outlet 1021.

[0092] In one embodiment, the second side plate 1014 is provided with a first connecting port 10142, and the water cooling pipe 2 passes through the first connecting port 10142 and is connected to the second side plate 1014.

[0093] In one embodiment, the water-cooling pipe 2 extends from the surface of the second side plate 1014, which facilitates the operator to weld the water-cooling pipe 2 to the second side plate 1014 using welding materials.

[0094] In a preferred embodiment, the length of the end of the water-cooled pipe 2 protruding from the surface of the second side plate 1014 is L, where 2mm ≤ L ≤ 5mm.

[0095] In one embodiment, such as Figure 7 and Figure 11As shown, the water outlet wall 102 includes a third side plate 1023 and a fourth side plate 1024 disposed opposite to each other. The water cooling pipe 2 is connected to the third side plate 1023. The fourth side plate 1024 is provided with a second protrusion 10231 and a third groove 10232. The water outlet 1021 is provided on the fourth side plate 1024. The second protrusion 10231 protrudes away from the third side plate 1023. The third groove 10232 is provided in the middle of the second protrusion 10231 and is recessed towards the third side plate 1023. The third side plate 1023 is provided with a fourth groove 10241. The fourth groove 10241 is provided at the corresponding position of the third groove 10232 and is recessed away from the third side plate 1023. The third cavity section 10221 is provided between the third groove 10232 and the fourth groove 10241. The fourth cavity section 10222 is provided between the second protrusion 10231 and the third side plate 1023.

[0096] With this configuration, the cooperation of the third groove 10232, the fourth groove 10241, and the second protrusion 10231 not only forms the third cavity 10221 and the fourth cavity 10222 in the water inlet wall 101, but the curved third groove 10232, the fourth groove 10241, and the second protrusion 10231 also increase the structural strength of the third and fourth sidewalls, thereby enhancing the water inlet wall 101's resistance to water flow impact and helping to extend the service life of the combustion chamber assembly.

[0097] In one embodiment, a second connector 10242 is provided on the fourth side plate 1024, and the water cooling pipe (2) passes through the second connector 10242 and is connected to the fourth side plate 1024.

[0098] This setup makes it easy for operators to use welding materials to connect the water-cooled pipe 2 to the fourth side plate 1024.

[0099] In a preferred embodiment, such as Figure 4 As shown, the length of the end of the water-cooling pipe 2 protruding from the surface of the fourth side plate 1024 is L, 2mm≤L≤5mm.

[0100] In one embodiment, the inlet wall and the outlet wall have the same structure. With this configuration, only one set of molds is needed to complete the processing of the inlet wall and the outlet wall, which can reduce the manufacturing cost of the combustion chamber components.

[0101] In one embodiment, such as Figure 3 As shown, the combustion chamber body 1 also includes a connecting wall 103.

[0102] The connecting wall 103 is connected between the water inlet chamber 1012 and the water outlet chamber 1022. The connecting walls 103 are arranged in pairs, and a combustion chamber is formed between the two connecting walls 103.

[0103] The connecting wall 103, the water inlet wall 101, and the water outlet wall 102 can form a combustion chamber. The high-temperature flue gas during the combustion process of the burner can exchange heat with the water-cooling pipe 2 in the combustion chamber, thereby heating the cooling water. Based on this, the water inlet wall 101, the water outlet wall 102, and the two connecting walls 103 of the combustion chamber assembly in this application embodiment can all exchange heat with the flue gas in the combustion chamber, thereby reducing the loss of heat generated by the combustion of gas inside the combustion chamber.

[0104] In one embodiment, the water-cooled pipe 2 is disposed in the combustion chamber, and the connecting wall 103 is provided with an arc-shaped groove 1031, in which the water-cooled pipe 2 is disposed.

[0105] With this configuration, the inward-facing side of the water-cooled pipe 2 can directly exchange heat with the high-temperature flue gas, while the outward-facing side of the water-cooled pipe 2 can make surface contact with the groove wall of the arc-shaped groove. This increases the heat exchange area between the water-cooled pipe 2 and the connecting wall 103, which helps to improve the heat exchange efficiency between the two.

[0106] In one embodiment, such as Figure 5 As shown, the arc length of the arc-shaped groove is less than or equal to half the circumference of the water-cooling pipe.

[0107] This design makes it easier for the water-cooling tube 2 to be placed into the arc-shaped groove 1031.

[0108] In a preferred embodiment, the arc length of the arc groove is set to be equal to half the circumference of the water-cooling pipe 2, which can maximize the contact area between the connecting wall 103 and the water-cooling pipe 2.

[0109] In one embodiment, such as Figure 14 and Figure 15 As shown, the connecting wall 103 is provided with a pipe channel 10311, which extends along the distance between the water inlet wall 101 and the water outlet wall 102, and the water cooling pipe 2 passes through the pipe channel 10311.

[0110] With this arrangement, the connecting wall 103 can completely wrap around the entire water-cooled pipe 2, so that the entire surface of the water-cooled pipe 2 is in contact with the connecting wall 103, thereby increasing the heat exchange area between the two.

[0111] In one embodiment, during the processing of the connecting wall 103, the water-cooling pipe 2 is embedded into the casting mold of the connecting wall 103 and cast as a single unit.

[0112] In one embodiment, the combustion chamber body 1 and / or water cooling pipe 2 are made of stainless steel.

[0113] In related technologies, the combustion chamber body 1 of a gas water heater is generally made of copper, and copper water pipes are at risk of corrosion and leakage.

[0114] The combustion chamber body 1 and copper water pipes of the gas water heater in this embodiment are made of stainless steel. The corrosion resistance of stainless steel can effectively reduce the risk of water pipe leakage. In addition, the use of stainless steel to make water pipes and combustion chamber body 1 has the disadvantage of being difficult to shape. In this embodiment, the water cooling pipe 2 uses multiple straight pipes arranged in parallel instead of a single coiled pipe that is arranged around the outside of combustion chamber body 1. The combustion chamber body 1 is composed of an inlet wall 101, an outlet wall 102 and a connecting wall 103. There is no need to bend it during assembly, avoiding the springback and forming resistance of stainless steel during processing. This overcomes the disadvantage of being difficult to shape caused by using stainless steel to make combustion chamber body 1 and water pipes.

[0115] In addition, in related technologies, when the burner body and water cooling pipe are made of stainless steel, the stainless steel water cooling coil is wrapped around the combustion chamber body four to five times. Due to the high yield strength and large elastic modulus of stainless steel, the stainless steel water cooling pipe is prone to springback after bending. It is necessary to achieve zero dimensional fit between the combustion chamber body and the water cooling pipe to ensure that the water cooling pipe is in contact with the combustion chamber body.

[0116] The burner body of this embodiment has an arc-shaped groove on its connecting wall, and the water-cooling pipe is located in the arc-shaped groove, which can effectively increase the contact area between the water-cooling pipe and the connecting wall.

[0117] In one embodiment, the combustion chamber assembly further includes heat dissipation fins disposed on the combustion chamber body 1, and the heat dissipation fins are copper fins.

[0118] Since the heat transfer coefficient of copper fins is better than that of stainless steel fins, the heat transfer effect of the fins can be guaranteed without having to make the fin volume larger. This application uses stainless steel combustion chamber body 1 and water cooling pipe 2 in combination with copper fins, which can reduce the risk of water leakage of combustion chamber components while ensuring the heat transfer effect of combustion chamber components.

[0119] As an alternative implementation, the heat dissipation fins are made of stainless steel.

[0120] According to an embodiment of the present invention, another aspect provides a gas water heater, including a combustion chamber assembly and a burner.

[0121] The combustion chamber assembly is the combustion chamber assembly of the first aspect of this utility model. The burner is disposed below the combustion chamber assembly.

[0122] The gas water heater of the second aspect of this utility model includes or uses the combustion chamber assembly of the first aspect of this utility model, and therefore has its beneficial effects, namely: during use, cooling water can enter the inlet wall 101 through the inlet pipe, and is distributed by the inlet wall 101 to multiple water-cooled pipes 2. After absorbing heat from the combustion chamber assembly, it flows into the outlet wall 102, and finally, the heat absorbed by the water is transferred to the next heat exchange device, such as the main heat exchanger, through the outlet. Under the action of water flow, the heat of the flame is basically not transferred to the periphery of the combustion chamber body, and the heat loss is very small.

[0123] Since multiple water-cooling pipes 2 can be circulated with water at the same time, each water-cooling pipe 2 extends from the inlet wall 101 to the outlet wall 102, thereby increasing the water flow area of ​​the water-cooling pipe 2 and shortening the water flow path of the water-cooling pipe 2. This greatly reduces water resistance and avoids problems such as abnormal water system pressure, slow water output, insufficient water volume, or even dry burning caused by excessive water resistance.

[0124] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope of protection claimed by the present invention.

Claims

1. A combustion chamber assembly characterized by, include: The combustion chamber body (1) includes an inlet wall (101) and an outlet wall (102) arranged opposite to each other. The inlet wall (101) is provided with an inlet (1011) and an inlet chamber (1012) connected in sequence. The outlet wall (102) is provided with an outlet chamber (1022) and an outlet (1021) connected in sequence. Multiple water-cooled pipes (2) are provided on at least one side of the combustion chamber body (1). The water inlet end of the water-cooled pipe (2) is connected to the water inlet chamber (1012), and the water outlet end of the water-cooled pipe (2) is connected to the water outlet chamber (1022). The water-cooled pipe (2) can exchange heat with the combustion chamber body (1).

2. The combustion chamber assembly of claim 1, wherein, The water inlet chamber (1012) includes a first section (10121) and a second section (10122). The first section (10121) is connected to the water inlet (1011), and the second section (10122) is connected to the first section (10121) and the water cooling pipe (2). The second section (10122) is arranged around the outer periphery of the first section (10121).

3. The combustion chamber assembly of claim 2, wherein, The water inlet wall (101) includes a first side plate (1013) and a second side plate (1014) disposed opposite to each other. The water inlet (1011) is disposed on the first side plate (1013), and the water cooling pipe (2) is connected to the second side plate (1014). The first side plate (1013) is provided with a first protrusion (10131) and a first groove (10132). The first protrusion (10131) protrudes in a direction away from the second side plate (1014), and the first groove (10132) is disposed on the first protrusion (10131). The first cavity segment (10121) is located between the first groove (10132) and the second groove (10141). The second cavity segment (10121) is located between the first groove (10132) and the second groove (10141). The second cavity segment (10122) is located between the first protrusion (10131) and the second side plate (1014).

4. The combustion chamber assembly of claim 3, wherein, The first side plate (1013) is also provided with a first connecting edge (10133), which surrounds the first protrusion and is used to connect the second side plate (1014).

5. The combustion chamber assembly of claim 3, wherein, The second side plate (1014) is provided with a first connecting port (10142), and the water cooling pipe (2) passes through the first connecting port (10142) and is connected to the second side plate (1014).

6. The combustion chamber assembly of any one of claims 1 to 5, wherein, The water outlet chamber (1022) includes a third section (10221) and a fourth section (10222). The third section (10221) is connected to the water outlet, and the fourth section (10222) is connected to the third section (10221) and the water cooling pipe (2). The fourth section (10222) is arranged around the outer periphery of the third section (10221).

7. The combustion chamber assembly of claim 6, wherein, The water outlet wall (102) includes a third side plate (1023) and a fourth side plate (1024) arranged opposite to each other. The water cooling pipe (2) is connected to the third side plate (1023). The fourth side plate (1024) is provided with a second protrusion (10231) and a third groove (10232). The water outlet (1021) is provided on the fourth side plate (1024). The second protrusion (10231) protrudes away from the third side plate (1023), and the third groove (10232) is provided in the middle of the second protrusion (10231). The third side plate (1023) is recessed towards the third side plate (1023). The third side plate (1023) is provided with a fourth groove (10241). The fourth groove (10241) is located at the corresponding position of the third groove (10232) and is recessed away from the third side plate (1023). The third cavity segment (10221) is located between the third groove (10232) and the fourth groove (10241). The fourth cavity segment (10222) is located between the second protrusion (10231) and the third side plate (1023).

8. The combustion chamber assembly of claim 7, wherein, The fourth side plate (1024) is provided with a second connecting port (10242), and the water cooling pipe (2) passes through the second connecting port (10242) and is connected to the fourth side plate (1024).

9. The combustion chamber assembly of any one of claims 1 to 5, wherein, The combustion chamber body (1) also includes: A connecting wall (103) is connected between the water inlet chamber (1012) and the water outlet chamber (1022). The connecting walls (103) are arranged in pairs, and a combustion chamber is formed between the two connecting walls (103).

10. The combustion chamber assembly according to claim 9, characterized in that, The water-cooling pipe (2) is located in the combustion chamber, and the connecting wall (103) is provided with an arc-shaped groove (1031), in which the water-cooling pipe (2) is located.

11. The combustion chamber assembly of claim 10, wherein, The arc length of the arc-shaped groove is less than or equal to half the circumference of the water-cooling pipe (2).

12. The combustion chamber assembly of claim 9, wherein, The connecting wall (103) is provided with a pipe channel (10311), which extends along the distance between the water inlet wall (101) and the water outlet wall (102), and the water cooling pipe (2) passes through the pipe channel (10311).

13. The combustion chamber assembly of any one of claims 1 to 5, wherein, The combustion chamber body (1) and / or the water cooling pipe (2) are made of stainless steel.

14. The combustion chamber assembly of any one of claims 1 to 5, wherein, It also includes heat dissipation fins, which are disposed on the combustion chamber body (1), and the heat dissipation fins are made of copper.

15. A gas water heater, characterized by, include: Combustion chamber assembly as claimed in any one of claims 1 to 14; The burner is located below the combustion chamber assembly.

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