Gas water heater outer box heat dissipation ventilation structure

Abstract

This utility model discloses a heat dissipation and ventilation structure for the outer casing of a gas water heater, relating to the field of gas water heater heat dissipation technology. It includes an outer casing containing a combustion chamber and a fan. Symmetrically arranged inverted U-shaped left and right air ducts are located on the inner sides of the left and right side panels. The width of each duct is less than half the width of the corresponding side panel and consists of a fitting section that adheres to the inner wall of the side panel, an inner extension section extending into the combustion chamber, and an arc-shaped transition section. The fan is connected to the air inlet of the air duct via a Y-shaped pipe. The inner extension section supplies gas to the burner in the combustion chamber via a gas pipe, while the fitting section achieves heat dissipation of the outer casing through heat exchange with the side panels via airflow. A second air outlet is added to the inner extension section, introducing a split airflow to the control box via an L-shaped connecting pipe, which, together with a guide plate, achieves stable distribution of main and auxiliary airflow. This structure, through symmetrical air duct design and directional airflow guidance, simultaneously addresses heat dissipation of the outer casing, gas supply to the combustion chamber, and heat dissipation of the control box, improving the overall operational safety and component lifespan.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for gas water heaters, and in particular to a heat dissipation and ventilation structure for the outer casing of a gas water heater. Background Technology

[0002] The heat dissipation and ventilation effect of the outer casing of a gas water heater directly affects the overall operating safety and the service life of its components. If the outer casing is in a high-temperature state for a long time, it will not only cause the surface to be hot to the touch (posing a risk of burns to users), but it will also accelerate the aging and failure of heat-sensitive components inside the casing (such as control board chips and solenoid valve coils), and may even cause circuit failures.

[0003] However, the existing external heat dissipation and ventilation design of forced-draft gas water heaters does not revolve around the core requirement of "efficient heat dissipation of the external casing" and does not adapt to the characteristics of concentrated heat generation in the combustion chamber and heat exchanger of forced-draft models: existing models generally rely on natural convection of the external casing wall or ventilation through the gaps in the casing to achieve heat dissipation. However, the heat conducted from the combustion chamber and heat exchanger to the external casing is much greater than the heat that can be carried away by natural convection. Especially in a confined space, hot air cannot be discharged in time, and the problem of high temperature accumulation in the external casing is more prominent. This cannot meet the temperature requirements for long-term stable operation of components such as control boards and solenoid valves (usually below 60°C). Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a heat dissipation and ventilation structure for the outer casing of a gas water heater, solving the problem that existing forced-draft gas water heaters lack an active heat dissipation structure for the outer casing, leading to heat accumulation in the outer casing, which fails to ensure stable operation of heat-sensitive components and poses a risk of scalding to users.

[0005] The technical solution of this utility model is as follows: A heat dissipation and ventilation structure for the outer casing of a gas water heater includes an outer casing. The outer casing includes a symmetrically arranged left side panel, a right side panel, and a front panel connecting the front ends of the two. A combustion chamber is provided inside the outer casing, and a fan is provided below the combustion chamber. An inverted U-shaped left air duct is provided on the inner side of the left side panel, and an inverted U-shaped right air duct is provided on the inner side of the right side panel. The two are symmetrical and arranged along the height direction of the outer casing. The width of the left and right air ducts is less than half the width of the corresponding side panels. Its symmetrical layout can make the airflow distribution on both sides of the outer casing even, ensuring uniform heat dissipation.

[0006] Both the left and right air ducts include a fitting section that conforms to the inner wall of the corresponding side panel, an inner extension section located inside the outer casing, and a transition section connecting the upper ends of the fitting section and the inner extension section. The inner extension section and the fitting section are parallel and spaced apart, and the three are connected to form an inverted U-shaped air duct. The fitting section extends along the inner wall of the side panel, and its direction matches the contour of the side panel. The transition section has a smooth arc transition to avoid the formation of turbulence in the airflow. The inner extension section extends towards the combustion chamber area. The three are connected by a seal to form a continuous airflow channel, ensuring that the airflow introduced by the fan can flow directionally along the air duct, while heat dissipation is achieved by utilizing the structural connection between the air duct and the outer casing.

[0007] Each of the lower sections of the bonding section is provided with an air inlet, and the outlet of the fan is connected to two air inlets respectively. Each of the lower ends of the inner extension section is provided with a first air outlet, and each first air outlet is connected to an air pipe. The end of the air pipe away from the inner extension section extends into the combustion chamber, and the air pipe section located in the combustion chamber is provided with an air supply port. When the fan is working, it introduces external air into the air duct. After the airflow enters the bonding section through the air inlet, it flows along the air duct path. When it flows through the bonding section, it forms a heat exchange with the inner wall of the side plate, realizing heat dissipation of the outer box, and at the same time providing an airflow source for the combustion chamber.

[0008] Furthermore, the fan is located in the middle of the two air inlets, and the fan outlet is connected to the two air inlets respectively through a Y-shaped pipe; the two branches of the Y-shaped pipe are symmetrically distributed, which can evenly distribute the airflow output by the fan to the left and right air ducts, avoiding the situation of excessive airflow on one side and insufficient airflow on the other side, and ensuring that the heat dissipation efficiency on both sides of the outer casing is consistent.

[0009] Furthermore, the side of the bonding section facing the inner wall of the corresponding side panel is an open structure, and its open edge is sealed to the inner wall of the side panel by a silicone strip, together forming the inner wall of the air duct; the other three sides of the bonding section are closed walls; the sealed connection between the open side and the inner wall of the side panel can ensure that the airflow in the air duct can directly contact the inner wall of the side panel, and the heat of the side panel can be carried away by the airflow.

[0010] Furthermore, the combustion chamber is equipped with a burner assembly, and the gas pipe sections extending into the combustion chamber are symmetrically distributed along the transverse axis of the combustion chamber and are located on both sides of the burner assembly. The upper end face of the gas pipe sections is provided with multiple air inlets, each air inlet facing the air inlet of the burner assembly. Their symmetrical distribution can balance the air supply on both sides of the burner assembly, and the design of the air inlets facing the air inlet can reduce the ineffective diffusion of airflow in the combustion chamber, improve the mixing efficiency of air and fuel, and ensure complete combustion.

[0011] Furthermore, a control box is provided near the inner wall of the left or right side panel, and control components are provided inside the control box. A second air outlet is provided on the inner extension section of the left or right air duct, and the second air outlet is connected to the inside of the control box through a connecting pipe. The second air outlet introduces part of the airflow in the air duct into the control box through the connecting pipe, and uses the airflow to remove the heat generated by the operation of the control components, thereby solving the problem of high temperature caused by the control components being close to heat sources such as the combustion chamber and heat exchanger.

[0012] Furthermore, the flow cross-sectional area of ​​the second air outlet is 1 / 4 to 1 / 6 of the flow cross-sectional area of ​​the first air outlet; the connecting pipe is L-shaped, with its horizontal section connected to the second air outlet and its upper vertical section connected to the control box; the air inlet side of the horizontal section is integrally extended with a guide plate that extends into the inner extension section, with the extension length not exceeding 1 / 3 of the cross-sectional diameter of the inner extension section; the cross-sectional area ratio design of the second air outlet and the first air outlet can allocate an appropriate amount of cooling airflow to the control box while ensuring that the first air outlet supplies air to the combustion chamber first; the L-shaped connecting pipe can adapt to the spatial orientation between the control box and the inner extension section, reducing resistance during airflow transport; the guide plate can guide part of the airflow in the inner extension section into the second air outlet, and its extension length control can avoid excessive obstruction of the main airflow, ensuring a stable air supply to the first air outlet.

[0013] The beneficial effects of this utility model are as follows: 1. This utility model, through the symmetrical layout of the left and right air ducts and the inverted U-shaped structure design, combined with the airflow distribution logic of the Y-shaped pipe, enables the airflow introduced by the fan to be efficiently distributed along a preset path—meeting the heat dissipation requirements of the outer casing, while ensuring the air supply to the combustion chamber and the heat dissipation of the control box, forming a collaborative system of "one airflow for multiple uses".

[0014] 2. The bonding section of this utility model adopts a structure in which the open side is sealed to the inner wall of the side plate, so that the airflow directly contacts the inner wall of the side plate and carries away the heat through the flow. Combined with the arrangement of the air duct along the height direction of the outer box, the heat dissipation coverage is expanded and the surface temperature of the outer box is reduced.

[0015] 3. The two gas pipes of this utility model are symmetrically distributed on both sides of the burner assembly along the transverse axis of the combustion chamber, forming a double-sided gas supply layout; the structural design of the air inlet facing the burner air inlet allows the airflow to accurately cover the combustion areas on both sides of the burner assembly after passing through the first air outlet and the gas pipe, thereby improving the uniformity of gas and air mixing and enhancing combustion completeness and thermal efficiency.

[0016] 4. This utility model, through the cross-sectional area ratio design of the second air outlet and the first air outlet, combined with the spatial adaptation of the L-shaped connecting pipe and the directional guidance logic of the guide plate, introduces an appropriate amount of airflow to the control box while ensuring the priority of the main air supply to the combustion chamber; the airflow flows directly through the control components and carries away heat, maintaining the stability of the working environment of the components. Attached Figure Description

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

[0018] Figure 2 This is a schematic diagram showing the position of the gas pipe extending into the combustion chamber according to this utility model.

[0019] Figure 3 This is a schematic diagram of the gas tube and the burner assembly of this utility model.

[0020] Figure 4 This is a schematic diagram of the trachea of ​​this utility model.

[0021] Figure 5 This is a schematic diagram of the guide plate of the connecting pipe in this utility model.

[0022] Reference numerals: 1. Outer casing; 1-1. Left side panel; 1-2. Right side panel; 1-3. Front panel; 2. Combustion chamber; 3. Fan; 4. Left air duct; 4-1. Fitting section; 4-2. Inner extension section; 4-3. Transition section; 5. Right air duct; 6. Air pipe; 6-1. Air outlet; 7. Y-shaped pipe; 8. Burner assembly; 8-1. Air inlet; 9. Control box; 10. Connecting pipe; 10-1. Deflector. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] like Figures 1 to 5 As shown, a gas water heater outer casing ventilation structure includes an outer casing 1. The outer casing 1 includes a symmetrically arranged left side plate 1-1, a right side plate 1-2, and a front panel 1-3 connecting the front ends of the two. A combustion chamber 2 is provided inside the outer casing 1, and a fan 3 is provided below the combustion chamber 2. An inverted U-shaped left air duct 4 is provided on the inner side of the left side plate 1-1, and an inverted U-shaped right air duct 5 is provided on the inner side of the right side plate 1-2. The two are symmetrical and arranged along the height direction of the outer casing 1. The width of the left air duct 4 and the right air duct 5 is less than half the width of the corresponding side plate. Its symmetrical layout can make the airflow distribution on both sides of the outer casing 1 even, ensuring the uniformity of heat dissipation.

[0025] Both left and right air ducts 5 include a fitting section 4-1 that fits the inner wall of the corresponding side panel, an inner extension section 4-2 located inside the outer casing 1, and a transition section 4-3 connecting the upper ends of the fitting section 4-1 and the inner extension section 4-2. The inner extension section 4-2 and the fitting section 4-1 are parallel and spaced apart, and the three are connected to form an inverted U-shaped air duct. The fitting section 4-1 extends along the inner wall of the side panel, and its direction matches the contour of the side panel. The transition section 4-3 has a smooth arc transition to avoid the formation of turbulence in the airflow. The inner extension section 4-2 extends towards the area where the combustion chamber 2 is located. The three are connected by a seal to form a continuous airflow channel, ensuring that the airflow introduced by the fan 3 can flow directionally along the air duct, while heat dissipation is achieved by utilizing the structural connection between the air duct and the outer casing 1.

[0026] Each section 4-1 of the bonding section is equipped with an air inlet. The outlet of the fan 3 is connected to the two air inlets. Each section 4-2 of the inner extension section is equipped with a first air outlet. Each first air outlet is connected to an air pipe 6. The first air outlet and the air pipe 6 are connected by a plug-in connection. The end of the first air outlet is inserted into the air pipe 6. A worm gear type hose clamp is fitted at the connection. A high-temperature resistant silicone sealing ring is placed at the contact point between the hose clamp and the pipe. By tightening the hose clamp, the sealing ring is tightly fitted to the pipe wall to ensure that there is no air leakage. The end of the air pipe 6 away from the inner extension section 4-2 extends into the combustion chamber 2. Each section of the air pipe 6 in the combustion chamber 2 is equipped with an air outlet 6-1. When the fan 3 is working, it introduces external air into the air duct. After the airflow enters the bonding section 4-1 through the air inlet, it flows along the air duct path. When it flows through the bonding section 4-1, it forms a heat exchange with the inner wall of the side plate to achieve heat dissipation for the outer casing 1 and at the same time provides an airflow source for the combustion chamber 2.

[0027] Furthermore, the fan 3 is located in the middle of the two air inlets, and the outlet of the fan 3 is connected to the two air inlets through the Y-shaped pipe 7. The main pipe end of the Y-shaped pipe 7 is connected to the outlet of the fan 3 by a ring clamp. A heat-resistant rubber sealing ring is embedded in the inner side of the clamp. By tightening the clamp, the sealing ring is tightly attached to the pipe wall to achieve radial sealing. The two branch pipe ends are connected to the corresponding air inlets by plug fitting. Small hose clamps are fitted at the joints. Silicone sealing rings are sandwiched in the inner side of the hose clamps. By tightening the hose clamps, the sealing rings fill the gaps to achieve axial sealing. The two branch pipes of the Y-shaped pipe 7 are symmetrically distributed, which can evenly distribute the airflow output by the fan 3 to the left and right air ducts 5, avoiding the situation of excessive airflow on one side of the air duct and insufficient airflow on the other side, and ensuring that the heat dissipation efficiency on both sides of the outer casing 1 is consistent.

[0028] Furthermore, the side of the bonding section 4-1 facing the inner wall of the corresponding side panel is an open structure. The edge of the open side has a flange, and the flange has screw holes spaced along its length. The silicone strip has through holes at corresponding positions. By passing self-tapping screws through the through holes and screw holes of the silicone strip in sequence, the silicone strip is pressed and fixed between the inner wall of the side panel and the flange to complete the sealing connection. Together, they form the inner wall of the air duct. The other three sides of the bonding section 4-1 are closed walls. The sealing connection between the open side and the inner wall of the side panel can ensure that the airflow in the air duct can directly contact the inner wall of the side panel and remove the heat of the side panel through the airflow.

[0029] Furthermore, the combustion chamber 2 is equipped with a burner assembly 8. The sections of the two gas pipes 6 extending into the combustion chamber 2 are symmetrically distributed along the transverse axis of the combustion chamber 2 and are located on both sides of the burner assembly 8. The upper end face of the gas pipe 6 section is provided with multiple air inlets 6-1 at intervals, and each air inlet 6-1 faces the air inlet 8-1 of the burner assembly 8. Their symmetrical distribution can make the air supply on both sides of the burner assembly 8 balanced. The design of the air inlets 6-1 facing the air inlet 8-1 can reduce the ineffective diffusion of airflow in the combustion chamber 2, improve the mixing efficiency of air and fuel, and ensure complete combustion.

[0030] Furthermore, a control box 9 is provided near the inner wall of the left side panel 1-1 or the right side panel 1-2. The control box 9 contains control components. A second air outlet is provided on the inner extension section 4-2 of the left air duct 4 or the right air duct 5. The second air outlet is connected to the inside of the control box 9 through a connecting pipe 10. The second air outlet introduces part of the airflow in the air duct into the control box 9 through the connecting pipe 10, and uses the airflow to remove the heat generated by the operation of the control components, thereby solving the problem of high temperature caused by the control components being close to heat sources such as the combustion chamber 2 and the heat exchanger.

[0031] Furthermore, the flow cross-sectional area of ​​the second air outlet is 1 / 4 to 1 / 6 of that of the first air outlet; the connecting pipe 10 is L-shaped, with its horizontal section connected to the second air outlet and its upper vertical section connected to the control box 9; the air inlet side of the horizontal section has an integrally extended guide plate 10-1 that extends into the inner extension section 4-2, with the extension length not exceeding 1 / 3 of the cross-sectional diameter of the inner extension section 4-2; the cross-sectional area ratio of the second air outlet to the first air outlet is designed to ensure optimal air supply from the first air outlet to the combustion chamber 2. Under the premise of prioritizing the control box 9, an appropriate amount of heat dissipation airflow is allocated; the guide plate 10-1 can guide part of the airflow in the inner extension section 4-2 into the second air outlet, and its extension length control can avoid excessive obstruction of the main airflow, ensuring a stable air supply to the first air outlet. The connecting pipe 10 and the second air outlet are connected by a plug-in joint, and the horizontal end of the connecting pipe 10 is inserted into the second air outlet. A miniature hose clamp is fitted at the connection point, and a heat-resistant silicone sealing ring is padded on the inside of the hose clamp. By tightening the hose clamp, the sealing ring is made to fit tightly against the interface gap.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat dissipation and ventilation structure for the outer casing of a gas water heater, comprising an outer casing, the outer casing including a left side plate, a right side plate, and a front panel connecting the front ends of the two symmetrically arranged, a combustion chamber being provided inside the outer casing, and a fan being provided below the combustion chamber, characterized in that... The inner side of the left side panel is provided with an inverted U-shaped left air duct, and the inner side of the right side panel is provided with an inverted U-shaped right air duct. The two are symmetrical and are arranged along the height direction of the outer box. The left and right air ducts each include a fitting section that fits into the inner wall of the corresponding side panel, an inner extension section located inside the outer box, and a transition section connecting the upper end of the fitting section and the inner extension section. The three are connected to form an inverted U-shaped air duct. The lower section of each bonding section is provided with an air inlet, and the outlet of the fan is connected to the two air inlets respectively; Each of the inner extension sections is provided with a first air outlet at its lower end. Each first air outlet is connected to an air pipe. The end of the air pipe away from the inner extension section extends into the combustion chamber, and the air pipe section located in the combustion chamber is provided with an air supply port.

2. The heat dissipation and ventilation structure for the outer casing of a gas water heater according to claim 1, characterized in that, The fan is located in the middle of the two air inlets, and the fan outlet is connected to the two air inlets respectively through a Y-shaped pipe.

3. The heat dissipation and ventilation structure for the outer casing of a gas water heater according to claim 1, characterized in that, The width of the left and right air ducts is less than half the width of the corresponding side panels.

4. The heat dissipation and ventilation structure for the outer casing of a gas water heater according to claim 1, characterized in that, The side of the bonding section facing the inner wall of the corresponding side panel is an open structure, and its open edge is sealed to the inner wall of the side panel to form the inner wall of the air duct; the other three sides of the bonding section are closed walls.

5. The heat dissipation and ventilation structure for the outer casing of a gas water heater according to claim 1, characterized in that, The combustion chamber is equipped with a burner assembly, and the two gas pipes extending into the combustion chamber are symmetrically distributed along the transverse axis of the combustion chamber and are located on both sides of the burner assembly. The upper end face of the gas pipes is provided with multiple air outlets, each air outlet facing the air inlet of the burner assembly.

6. The heat dissipation and ventilation structure for the outer casing of a gas water heater according to claim 1, characterized in that, A control box is located near the inner wall of the left or right side panel. The control box contains control components. A second air outlet is provided on the inner extension of the left or right air duct. The second air outlet is connected to the inside of the control box through a connecting pipe.

7. The heat dissipation and ventilation structure for the outer casing of a gas water heater according to claim 6, characterized in that, The flow cross-sectional area of ​​the second air outlet is 1 / 4 to 1 / 6 of the flow cross-sectional area of ​​the first air outlet; the connecting pipe is L-shaped, with its horizontal section connected to the second air outlet and its upper end of the vertical section connected to the control box; the air inlet side of the horizontal section is provided with a guide plate extending into the inner extension section, with the extension length not exceeding 1 / 3 of the cross-sectional diameter of the inner extension section.

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