A heat dissipation structure for a wall-mounted boiler

Abstract

This utility model belongs to the technical field of wall-hung boilers, specifically a heat dissipation structure for a wall-hung boiler. It includes a boiler body, inside which a smoke exhaust assembly is installed. The smoke exhaust assembly includes a mounting bracket, on which a fan is fixedly mounted. An air duct is mounted on the fan, and an acceleration assembly is mounted on the air duct. The acceleration assembly includes a Venturi tube, which comprises a contraction section, a throat, and a diffusion section. Hot air from the combustion chamber flows throughout the boiler body. The fan draws in the hot air from inside the boiler body, which is then discharged through the air duct. The hot air is then guided into the Venturi tube, enters a recovery box, and finally exits through the smoke exhaust pipe. During this process, the hot air is accelerated as it passes through the narrow section of the Venturi tube, creating a negative pressure at the throat. The hot air is then discharged at high speed from the low-pressure area, increasing the airflow velocity. This structure improves the airflow velocity and enhances the efficiency of heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of wall-hung boiler technology, specifically a heat dissipation structure for a wall-hung boiler. Background Technology

[0002] A wall-hung boiler is a compact domestic or commercial heating device that is installed on a wall, uses gas as its energy source, and provides both heating and domestic hot water. Its core feature is that it heats water by burning gas and transfers the heat to the heating system or directly supplies hot water. In order to prevent local overheating inside the wall-hung boiler, a heat dissipation structure is needed to dissipate heat from the inside of the boiler.

[0003] Chinese patent application CN 115451580 A discloses a wall-hung boiler, including a shell, heating element, heat exchanger, three-way valve, and diaphragm. The shell contains a heating chamber, a heat exchange chamber, a water pressure balancing chamber, a first heating channel, a second heating channel, a third heating channel, a fourth heating channel, and a return water channel. The heating element is arranged within the heating chamber. The water pressure balancing chamber is divided into a first chamber and a second chamber by the diaphragm. The first chamber is connected to the heating chamber, and the second chamber is filled with gas for balancing water pressure. The wall-hung boiler proposed in this invention has a compact structure, reducing the overall volume of the boiler and lowering manufacturing costs. The heating and domestic water channels are arranged inside the boiler shell, not exposed to the outside, which helps with insulation and reduces heat loss. To further improve insulation performance, additional pipes can be installed inside the channels. The direct heating design of the water in the heating chamber by the heating element achieves a thermal efficiency of over 98%.

[0004] Existing heat dissipation structures suffer from low efficiency due to the slow airflow rate during the heat dissipation process within the wall-hung boiler. Therefore, a new heat dissipation structure for wall-hung boilers is proposed to address this issue. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems existing in the existing technology, this utility model proposes a heat dissipation structure for wall-hung boilers.

[0006] The technical solution adopted by this utility model to solve its technical problem is a heat dissipation structure for a wall-hung boiler, including a boiler body. A PLC controller is installed on the outer wall of the boiler body. A smoke exhaust assembly is installed inside the boiler body. An acceleration component is installed on the smoke exhaust assembly. A hot air recovery assembly is installed on the acceleration component. The smoke exhaust assembly includes a mounting bracket. A fan is fixedly installed on the mounting bracket. An air duct is installed on the fan. An acceleration component is installed on the air duct. The acceleration component includes a Venturi tube. The Venturi tube includes a contraction section, a throat, and a diffuser section. The hot air recovery assembly is connected to the diffuser section. An air inlet slot is installed on the side wall of the boiler body. A filter screen is installed on the inner wall of the boiler body at the air inlet slot. A combustion assembly is installed inside the boiler body. The combustion assembly includes a baffle plate. A filter screen is installed on the bottom side of the baffle plate. Equipped with a support frame, a heat exchanger is mounted on the bottom side of the partition via the support frame. A support plate is installed on the inner wall of the furnace body, and a baffle is fixedly installed between the support plate and the support frame. The space between the baffle and the support plate is a combustion chamber. A burner is placed on the support plate, and a gas pipe is connected to the burner. Hot air from the combustion chamber flows throughout the entire interior of the furnace body. A fan draws in the hot air from inside the furnace body, which is then discharged through a duct. The hot air is then introduced into a Venturi tube, then enters a recovery box, and finally is discharged from the exhaust pipe. During this process, the hot air accelerates as it passes through the narrow section of the Venturi tube, creating a negative pressure at the throat. The hot air is discharged at high speed from the low-pressure area, increasing the flow velocity of the hot air. This structure can increase the flow velocity of the hot air and is beneficial to improving the heat dissipation efficiency.

[0007] Preferably, the hot air recovery assembly includes a recovery box connected to a venturi tube. A heat recovery pipe is fixedly installed inside the recovery box via a mounting bracket. An exhaust pipe is installed on the side wall of the recovery box, with its other end extending outside the furnace body. A heat exchange assembly, including a plate heat exchanger, is installed inside the furnace body. The plate heat exchanger has a domestic water inlet pipe, a domestic water outlet pipe, a heating return pipe, and a heating outlet pipe installed on it. A circulating water pump is connected to the heating return pipe via a conduit. The circulating water pump is fixedly installed inside the furnace body and connected to the heat recovery pipe via a conduit. The other end of the heat recovery pipe is connected to a heat exchanger via a conduit, and the other end of the heat exchanger is connected to the heating outlet pipe. A domestic water inlet pipe and a domestic water outlet pipe are installed on the furnace body base plate. The system includes water pipes, gas pipes, heating inlet pipes, and heating outlet pipes. The heating inlet pipe is connected to the heating outlet pipe, and the heating outlet pipe is connected to the heating return pipe. Solenoid valves are installed on the domestic water inlet pipe, domestic water outlet pipe, gas pipe, heating inlet pipe, and heating outlet pipe. During the heating circulation process, a recovery tank is added. A heat recovery pipe is installed inside the recovery tank and is located between the heating return pipe and the plate heat exchanger. During the process of the low-temperature heating water flowing back into the heat exchanger, the low-temperature heating water flows through the heat recovery pipe. During this process, hot air is introduced into the recovery tank. The low-temperature heating water absorbs the heat from the hot air, raising its temperature to a certain level before flowing back into the heat exchanger for further heating. This achieves the recovery and utilization of waste heat from the hot air, which is beneficial for improving the recovery and utilization rate of waste heat from the hot air.

[0008] The advantages of this utility model are:

[0009] 1. In this invention, hot air from the combustion chamber flows throughout the entire interior of the furnace. A fan draws the hot air from inside the furnace and then directs it through the air duct. The hot air is then guided into the Venturi tube, then into the recovery box, and finally discharged through the exhaust pipe. During this process, the hot air accelerates as it passes through the narrow section of the Venturi tube, creating a negative pressure at the throat. The hot air is then discharged at high speed from the low-pressure area, increasing the flow rate of the hot air. This structure can improve the flow rate of the hot air and is beneficial to improving the efficiency of heat dissipation.

[0010] 2. This utility model adds a recovery box during the heating cycle. The recovery box is equipped with a heat recovery pipe, which is located between the heating return water pipe and the plate heat exchanger. That is, during the process of the low-temperature heating water flowing back into the heat exchanger, the low-temperature heating water will flow through the heat recovery pipe. During this process, hot air is introduced into the recovery box. The low-temperature heating water will absorb the heat of the hot air, and after its temperature is raised to a certain level, it will flow into the heat exchanger for heating. This realizes the recovery and utilization of waste heat from the hot air, which is beneficial to improving the recovery and utilization rate of waste heat from the hot air. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a first-person perspective 3D structural diagram;

[0013] Figure 2 A schematic diagram of the three-dimensional structure of the Venturi tube.

[0014] Figure 3 This is a schematic diagram of the three-dimensional structure of the combustion chamber;

[0015] Figure 4 This is a schematic diagram of the internal structure of the recycling bin;

[0016] Figure 5 This is a schematic diagram of the internal three-dimensional structure of the furnace body.

[0017] In the diagram: 1. Furnace body; 2. PLC controller; 3. Mounting bracket; 301. Fan; 302. Air duct; 4. Venturi tube; 401. Contraction section; 402. Throat; 403. Diffusion section; 5. Recovery box; 501. Heat recovery pipe; 502. Exhaust pipe; 6. Baffle; 601. Heat exchanger; 602. Support plate; 603. Baffle; 604. Combustion chamber; 605. Burner; 606. Gas pipe; 7. Plate heat exchanger; 701. Domestic water inlet pipe; 702. Domestic water outlet pipe; 703. Heating return pipe; 704. Heating outlet pipe; 705. Circulating water pump; 8. Heating inlet pipe; 801. Heating drain pipe; 9. Air inlet trough. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0019] Please see Figure 1-3As shown, a heat dissipation structure for a wall-hung boiler includes a boiler body 1, a PLC controller 2 mounted on the outer wall of the boiler body 1, a smoke exhaust assembly installed inside the boiler body 1, an acceleration component mounted on the smoke exhaust assembly, and a hot air recovery assembly mounted on the acceleration component. The smoke exhaust assembly includes a mounting bracket 3, a fan 301 fixedly mounted on the mounting bracket 3, an air duct 302 mounted on the fan 301, and an acceleration component mounted on the air duct 302. The acceleration component includes a Venturi tube 4. The furnace body 1 includes a contraction section 401, a throat 402, and a diffuser section 403. A hot air recovery assembly is connected to the diffuser section 403. An air inlet slot 9 is installed on the side wall of the furnace body 1, and a filter screen is installed on the inner wall of the furnace body 1 at the air inlet slot 9. A combustion assembly is installed inside the furnace body 1, and the combustion assembly includes a baffle plate 6. A support frame is installed on the bottom side of the baffle plate 6, and a heat exchanger 601 is installed on the bottom side of the baffle plate 6 via the support frame. A support plate 602 is installed on the inner wall of the furnace body 1, and the support plate 602 and the support frame are connected... A baffle 603 is fixedly installed between the baffle 603 and the support plate 602, forming a combustion chamber 604. A burner 605 is placed on the support plate 602, and a gas pipe 606 is connected to the burner 605. During operation, the existing diversion and heat dissipation structure has low efficiency in diverting and dissipating hot air in the wall-hung boiler due to the slow flow rate of the hot air. When the wall-hung boiler heats domestic water, the burner 605 (model HWP-2402) operates. The burner 605 is responsible for mixing and burning gas and air. Gas is introduced into the burner 605 through the gas pipe 606. The gas flow rate is regulated by a solenoid valve and ejected through the nozzle of the burner 605, forming a high-speed airflow. When the gas is injected, it draws in the surrounding air to form a gas mixture. The ignition electrode inside the burner 605 generates a spark, igniting the gas mixture. The flame burns stably on the surface of the burner 605, heating the heat exchanger 601 (model VUW). 242 / 5-3, heats the heating water inside the heat exchanger 601, and transfers the heat energy to the heating water so that the heating water and domestic water can exchange heat later;

[0020] During this process, the hot air in the combustion chamber 604 flows to the entire interior of the furnace body 1. The blower 301, model EBM-R2E220, operates to guide the gas inside the furnace body 1. It draws in cold air from the air inlet slot 9, filters it, and then splits it into two paths. One path enters the combustion chamber 604 to aid combustion, while the other path flows along the periphery of the heat exchanger 601 to carry away the heat from the outer shell. The blower 301 draws in the hot air inside the furnace body 1 and then discharges it through the air duct 302. The hot air is then introduced into the venturi tube 4, then into the recovery box 5, and finally discharged from the exhaust pipe 502.

[0021] In this process, the Venturi tube 4 is designed as a tapered-expanding structure. The contraction section 401 has a gradually decreasing cross-sectional area, and the fluid accelerates. The throat 402 is the narrowest point, with the maximum flow velocity and the lowest pressure. The diffusion section 403 has a gradually recovering cross-sectional area, and the fluid decelerates and the pressure rises. Through the dynamic balance between flow velocity and pressure, efficient energy conversion is achieved. That is, when hot air passes through the narrow section, it accelerates and forms a negative pressure at the throat 402. The hot air is discharged at high speed from the low-pressure area, which increases the flow velocity of the hot air. This structure can increase the flow velocity of the hot air and is conducive to improving the efficiency of heat dissipation.

[0022] Please see Figure 4-5 As shown, the hot air recovery assembly includes a recovery box 5, which is connected to a venturi tube 4. A heat recovery pipe 501 is fixedly installed inside the recovery box 5 via a mounting bracket. An exhaust pipe 502 is installed on the side wall of the recovery box 5, with the other end extending to the outside of the furnace body 1. A heat exchange assembly is installed inside the furnace body 1, including a plate heat exchanger 7. The plate heat exchanger 7 is equipped with a domestic water inlet pipe 701, a domestic water outlet pipe 702, a heating return pipe 703, and a heating outlet pipe 704. The heating return pipe 703 is connected to a circulating water pump 705 via a conduit. The circulating water pump 705 is fixedly installed inside the furnace body 1 and connected to the heat recovery pipe 501 via a conduit. The other end of the heat recovery pipe 501 is connected to a heat exchanger 601 via a conduit, and the other end of the heat exchanger 601 is connected to the heating outlet pipe 704. A domestic water inlet pipe 701, a domestic water outlet pipe 702, a heating return pipe 703, and a heating outlet pipe 704 are installed on the bottom plate of the furnace body 1. The boiler includes a water outlet pipe 702, a gas pipe 606, a heating inlet pipe 8, and a heating drain pipe 801. The heating inlet pipe 8 connects to the heating outlet pipe 704, and the heating drain pipe 801 connects to the heating return pipe 703. Solenoid valves are installed on the domestic water inlet pipe 701, domestic water outlet pipe 702, gas pipe 606, heating inlet pipe 8, and heating drain pipe 801. During operation, the existing heat dissipation structure struggles to recover and utilize the waste heat of the hot air during the heat dissipation process within the boiler, resulting in a low waste heat recovery rate. The boiler's operation can be divided into two main systems: heating circulation and hot water supply. During heating circulation, the heating water inside the heat exchanger 601 is heated and then discharged from the heat exchanger 601 through the heating outlet pipe 704. It then enters the plate heat exchanger 7, model SWEP. B5 / B8, hot water is supplied inside the plate heat exchanger 7. Domestic cold water enters the plate heat exchanger 7 from the domestic water inlet pipe 701. The domestic cold water exchanges heat with the heating water to raise the temperature of the domestic water. Then, the domestic hot water is discharged from the domestic water outlet pipe 702, thus realizing the hot water supply.

[0023] The heating water releases heat in the plate heat exchanger 7, and its temperature gradually decreases. Then, it flows out of the plate heat exchanger 7 from the heating return water pipe 703. After that, the circulating water pump 705 (model UPS225-40) operates, guiding the low-temperature heating water back into the heat exchanger 601 for heating, thus realizing the heating cycle. During the heating cycle, a recovery tank 5 is added. The recovery tank 5 is equipped with a heat recovery pipe 501, which is located between the heating return water pipe 703 and the plate heat exchanger 7. That is, as the low-temperature heating water flows back into the heat exchanger 601, it flows through the heat recovery pipe 501. During this process, hot air is introduced into the recovery tank 5. The low-temperature heating water absorbs the heat from the hot air, raising its temperature to a certain level, before flowing back into the heat exchanger 601 for heating. This realizes the recovery and utilization of waste heat from the hot air, which is beneficial to improving the recovery and utilization rate of waste heat from the hot air.

[0024] Working principle: Existing heat dissipation structures suffer from low efficiency due to the slow airflow rate during the heat dissipation process within the wall-hung boiler. When the boiler heats domestic water, the HWP-2402 burner 605 operates. The burner 605 is responsible for mixing and burning the gas and air. Gas is introduced into the burner 605 through the gas pipe 606. The gas flow rate is regulated by a solenoid valve and ejected through the nozzles of the burner 605, forming a high-speed airflow. This gas injection draws in surrounding air, creating a gas mixture. An ignition electrode within the burner 605 generates a spark, igniting the mixture. The flame burns stably on the surface of the burner 605, heating the heat exchanger 601 (model VUW). 242 / 5-3, the heating water inside the heat exchanger 601 is heated, and the heat energy is transferred to the heating water so that the heating water and domestic water can exchange heat. During this process, the hot air in the combustion chamber 604 flows to the entire interior of the furnace body 1. The blower 301, model EBM-R2E220, operates to guide the gas inside the furnace body 1. It draws in cold air from the air inlet slot 9, filters it, and splits it into two paths. One path enters the combustion chamber 604 to assist combustion, and the other path flows along the periphery of the heat exchanger 601 to carry away the heat from the outer shell. The blower 301 draws in the hot air inside the furnace body 1 and then discharges it through the air guide pipe 302. The hot air is then introduced into the venturi tube 4, then into the recovery box 5, and finally discharged from the exhaust pipe 502. During this process, the venturi tube 4 is designed with a tapered-expanding structure. The cross-sectional area of ​​the contraction section 401 gradually decreases, the fluid accelerates, and the throat 40 2: At the narrowest point, the flow velocity is the highest and the pressure is the lowest. In the diffuser section 403, the cross-sectional area gradually recovers, the fluid decelerates, and the pressure rises. Efficient energy conversion is achieved through the dynamic balance of flow velocity and pressure. Specifically, hot air accelerates as it passes through the narrow section, creating negative pressure at the throat 402. The hot air is then discharged at high speed from the low-pressure area, increasing its flow velocity. This structure improves the flow velocity of the hot air, which is beneficial for improving the efficiency of heat dissipation. Existing heat dissipation structures struggle to recover and utilize the waste heat of the hot air during the process of heat dissipation from the wall-hung boiler, resulting in a low waste heat recovery rate. The operation of the wall-hung boiler can be divided into two main systems: heating circulation and hot water supply. During heating circulation, the heating water inside the heat exchanger 601 is heated and discharged from the heat exchanger 601 through the heating outlet pipe 704. Then, it enters the plate heat exchanger 7, model SWEP. B5 / B8, hot water is supplied inside the plate heat exchanger 7. Domestic cold water enters the plate heat exchanger 7 from the domestic water inlet pipe 701. The domestic cold water exchanges heat with the heating water to raise the temperature of the domestic water. Then, the domestic hot water is discharged from the domestic water outlet pipe 702, thus realizing the hot water supply.The heating water releases heat within the plate heat exchanger 7, gradually decreasing in temperature. It then flows out of the plate heat exchanger 7 through the heating return pipe 703. The circulating water pump 705 (model UPS225-40) then operates, guiding the low-temperature heating water back into the heat exchanger 601 for reheating, thus achieving a heating cycle. During this cycle, a recovery tank 5 is added, containing a heat recovery pipe 501 located between the heating return pipe 703 and the plate heat exchanger 7. As the low-temperature heating water flows back into the heat exchanger 601, it passes through the heat recovery pipe 501. During this process, hot air is introduced into the recovery tank 5, and the low-temperature heating water absorbs the heat from the hot air, raising its temperature before flowing back into the heat exchanger 601 for reheating. This achieves the recovery and utilization of waste heat from the hot air, improving the efficiency of waste heat recovery.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A heat dissipation structure for a wall-hung boiler, characterized in that: The system includes a furnace body (1), on which a PLC controller (2) is installed. Inside the furnace body (1) is a smoke exhaust assembly, on which a speed-increasing assembly is installed, and on which a hot air recovery assembly is installed. The smoke exhaust assembly includes a mounting bracket (3), on which a fan (301) is fixedly mounted. A duct (302) is mounted on the fan (301), and an acceleration assembly is mounted on the duct (302). The acceleration assembly includes a venturi tube (4), which includes a contraction section (401), a throat (402), and a diffuser section (403). A hot air recovery assembly is connected to the diffuser section (403). An air inlet groove (9) is installed on the side wall of the furnace body (1). A filter screen is installed on the inner wall of the furnace body (1) at the air inlet groove (9). A combustion assembly is installed inside the furnace body (1). The combustion assembly includes a partition (6), on which a support frame is installed on the bottom side. A heat exchanger (601) is installed on the bottom side of the partition (6) through the support frame.

2. The heat dissipation structure of a wall-mounted furnace according to claim 1, wherein: A support plate (602) is installed on the inner wall of the furnace body (1). A baffle (603) is fixedly installed between the support plate (602) and the support frame. A combustion chamber (604) is located between the baffle (603) and the support plate (602). A fire bar (605) is placed on the support plate (602). A gas pipe (606) is connected to the fire bar (605).

3. The heat dissipation structure for a wall-hung boiler according to claim 1, characterized in that: The hot air recovery assembly includes a recovery box (5), which is connected to a venturi tube (4). A heat recovery pipe (501) is fixedly installed inside the recovery box (5) by a fixing bracket. An exhaust pipe (502) is installed on the side wall of the recovery box (5), and the other end of the exhaust pipe (502) extends to the outside of the furnace body (1).

4. The heat dissipation structure of a wall-hanging stove according to claim 1, wherein: The furnace body (1) is equipped with a heat exchange assembly, which includes a plate heat exchanger (7). The plate heat exchanger (7) is equipped with a domestic water inlet pipe (701), a domestic water outlet pipe (702), a heating return pipe (703), and a heating outlet pipe (704).

5. The heat dissipation structure of a wall-hanging stove according to claim 4, wherein: The heating return water pipe (703) is connected to a circulating water pump (705) via a conduit. The circulating water pump (705) is fixedly installed inside the furnace body (1). The circulating water pump (705) is connected to the heat recovery pipe (501) via a conduit. The other end of the heat recovery pipe (501) is connected to the heat exchanger (601) via a conduit. The other end of the heat exchanger (601) is connected to the heating outlet water pipe (704).

6. The heat dissipation structure of a wall-hanging stove according to claim 1, wherein: The furnace body (1) is equipped with a domestic water inlet pipe (701), a domestic water outlet pipe (702), a gas pipe (606), a heating water inlet pipe (8), and a heating drain pipe (801). The heating water inlet pipe (8) is connected to the heating water outlet pipe (704), and the heating drain pipe (801) is connected to the heating return water pipe (703). Solenoid valves are installed on the domestic water inlet pipe (701), the domestic water outlet pipe (702), the gas pipe (606), the heating water inlet pipe (8), and the heating drain pipe (801).

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