Gas heating and hot water supply dual-purpose furnace system

Abstract

The utility model discloses a gas heating and hot water supply dual-purpose furnace system, which relates to the technical field of water heaters and comprises a plate heat exchanger and an exhaust fume collecting hood covered on the plate heat exchanger. The waste heat of the high-temperature waste gas can be better utilized, and the heat directly acts on the heating and domestic water supply pipe, so that the temperature of water in the heating and domestic water supply pipe is increased, or the heat preservation effect on the water in the heating and domestic water supply pipe is achieved; compared with the prior art that high-temperature waste gas acts on the periphery of the plate heat exchanger for heat exchange, the contact area of heat exchange is larger, so that higher exchange efficiency and a better exchange effect are achieved, heat utilization of the high-temperature waste gas is more efficient, and energy is saved. Therefore, the energy-saving waste heat, energy-saving and heat-insulating effects of the gas heating and hot water supply dual-purpose furnace system are further improved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a gas-fired heating and hot water supply dual-purpose boiler system. Background Technology

[0002] The main function of a dual-purpose boiler is to meet users' domestic hot water needs and winter heating needs. In addition to the most important heating function, people are paying more and more attention to the performance of domestic hot water, especially the instant hot water function (the function of preheating the cold water from the shower, faucet, etc. to the water outlet of the water heater, solving the problem of having to discharge a section of cold water every time you take a shower). The demand for this function is becoming more and more obvious. Therefore, high-end dual-purpose boilers with instant hot water function are becoming more and more popular.

[0003] A search revealed a gas-fired heating and hot water dual-purpose boiler system in patent document CN216790514U. The system is characterized by: a plate heat exchanger located above a combustion heat exchanger; the heat exchanger tubes within the plate heat exchanger also include a second inlet and a second outlet connected to the combustion heat exchanger; together with the heating water pump, this forms a second domestic water heating circuit; under the action of the heating water pump, heated heating water passes through the plate heat exchanger to exchange heat with the domestic water; by placing the plate heat exchanger for domestic water heating above the original main heat exchanger in the water circuit, the residual heat from the exhaust gas after heat exchange is used to heat the domestic water in the plate heat exchanger; and by adding a second domestic water heating circuit to both the domestic water heating circuit and the heating water heating circuit, simultaneous operation of heating and instant hot water functions is achieved.

[0004] Based on the above research and existing technology, it was found that although existing gas-fired heating and hot water dual-purpose boiler systems guide high-temperature exhaust gas to plate heat exchangers to preheat and insulate them, the inherent characteristics of plate heat exchangers mean that the contact surface between the plate heat exchanger and the exhaust gas is only at the edge of the side wall. This results in a small contact area between the high-temperature exhaust gas and the plate heat exchanger, leading to poor heat exchange efficiency. Directly exchanging heat between the high-temperature exhaust gas and the water supply pipe is also ineffective and cannot fully utilize the heat from the high-temperature exhaust gas. Therefore, a gas-fired heating and hot water dual-purpose boiler system is needed. Utility Model Content

[0005] The purpose of this application is to provide a gas-fired boiler system for both heating and hot water supply to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a gas-fired heating and hot water supply dual-purpose boiler system, including a plate heat exchanger and a smoke collection hood covering the combustion heat exchanger. The smoke collection hood is used to collect and discharge the high-temperature exhaust gas generated by the combustion heat exchanger. Several heating and domestic water supply pipes are fixed at the exchange end of the plate heat exchanger, and the middle part of the heating and domestic water supply pipes is fixedly inserted through the side wall of the smoke collection hood.

[0007] The heating and domestic water supply pipe is equipped with a flow guide heat exchange plate through a deflectable and adjustable connection structure. The flow guide heat exchange plate is a thin plate that is tapered at the top. The edge of the flow-facing side of the flow guide heat exchange plate is integrally formed with a flow-gathering edge that protrudes outward. The flow-facing side of the flow guide heat exchange plate is also provided with a flow guide rib that guides the high-temperature exhaust gas to the heating and domestic water supply pipe.

[0008] The deflectable adjustable connection structure is used to adjust the tilt angle of the heat exchange fins, and it also plays a good role in heat conduction.

[0009] Preferably, the deflectable adjustable connection structure includes:

[0010] The movable plate is fixed at its lower end to the upper end of the heat exchange fins.

[0011] Fixed ball joint, which is a ball with a through hole in the middle, is fixedly sleeved on the heating and domestic water supply pipe;

[0012] The movable plate has a through hole in the middle that matches the fixed ball joint, and the inner wall of the movable plate has a micro-arc sliding wall that matches the spherical surface of the fixed ball joint. Both the movable plate and the fixed ball joint are made of thermally conductive materials.

[0013] Adjustable components are installed on both sides of the fixed ball joint. The adjustable components are used to limit the rotation of the movable plate or to allow the movable plate to deflect along the axis of the fixed ball joint perpendicular to the axis of the heating and domestic water supply pipe.

[0014] Preferably, the adjusting element includes:

[0015] Two fastening screws are provided and are respectively fixed to the front and rear ends of the fixed ball joint. The axis of the fastening screws is perpendicular to the axis of the heating and domestic water supply pipe in the horizontal plane.

[0016] Two adjusting nuts are provided and are screwed onto two fastening screws respectively;

[0017] Both sides of the movable plate are provided with limiting holes for the fastening screw to move through. When the adjusting nut is screwed onto the fastening screw, one side abuts against the outer wall of the movable plate and is fixed by friction with the fastening screw.

[0018] Preferably, a friction-enhancing washer is movably sleeved on the fastening screw. The friction-enhancing washer is an elastic rubber ring and is located between the adjusting nut and the outer wall of the movable plate. When the adjusting nut is tightened, the friction-enhancing washer is pressed against the outer wall of the movable plate and has an interference fit with the outer wall of the movable plate.

[0019] Preferably, a thermal grease filling cavity is formed inside the movable plate, and the thermal grease filling cavity is filled with thermal grease.

[0020] Preferably, the upper end of the movable plate is provided with an inlet for filling the thermal grease filling cavity with thermally conductive silicone grease, and a plunger for sealing the inlet is inserted inside the inlet.

[0021] In summary, the technical effects and advantages of this utility model are as follows:

[0022] 1. In this utility model, by using a heat exchange fin to exchange heat with the high-temperature exhaust gas collected by the fume hood, the waste heat of the high-temperature exhaust gas can be better utilized, and the heat can be directly applied to the heating and domestic water supply pipes, thereby raising the temperature of the water in the heating and domestic water supply pipes or providing insulation for the water in the heating and domestic water supply pipes. Compared with the prior art of applying heat exchange to the periphery of the plate heat exchanger, the contact area for heat exchange is larger, thereby achieving higher exchange efficiency and better exchange effect. The utilization of heat from the high-temperature exhaust gas is more efficient, thereby further improving the energy-saving waste heat and energy-saving insulation effect of the gas-fired heating and hot water supply dual-purpose boiler system.

[0023] 2. In this utility model, the movable plate, fixed ball joint, and fastening screw allow the movable plate to rotate along the fixed screw, thereby changing its angle while adhering to the fixed ball joint. This facilitates changing the tilt angle of the heat exchange fins, resulting in different flow velocities of the high-temperature exhaust gas on the flow-facing surface of the heat exchange fins. Consequently, the gas-fired heating and hot water boiler system can maximize the heat exchange between the high-temperature exhaust gas and the heat exchange fins according to the exhaust gas discharge speed requirements, thus meeting various high-temperature exhaust gas discharge flow requirements and maximizing the utilization of high-temperature exhaust gas heat, resulting in better performance. After changing the angle, tightening the adjusting nut causes one side of the adjusting nut to press against the outer wall of the movable plate, thereby limiting the movement of the movable plate and fixing the adjusted angle of the heat exchange fins. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a first-view stereoscopic structural diagram of the embodiment.

[0026] Figure 2 This is a schematic diagram of the plate heat exchanger and heating and domestic water supply pipe structure from a second perspective in this embodiment.

[0027] Figure 3 This is a schematic diagram of the heat exchange fins, movable plate, and fixed ball junction structure in this embodiment.

[0028] Figure 4 This is a schematic diagram of the disassembled structure of the fixed ball joint and the movable plate in this embodiment;

[0029] Figure 5 This is a schematic diagram of the half-section structure of the movable plate in this embodiment.

[0030] In the diagram: 1. Heat exchange fin; 11. Condensing edge; 12. Guide rib; 2. Movable plate; 21. Micro-arc sliding wall; 22. Thermal grease filling cavity; 23. Limiting perforation; 24. Addition port; 25. Plunger; 3. Fixed ball joint; 4. Fastening screw; 5. Adjusting nut; 6. Friction-increasing washer;

[0031] 100. Plate heat exchanger; 200. Smoke hood; 300. Heating and domestic water supply pipes. Detailed Implementation

[0032] 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 protection scope of the present utility model.

[0033] Example: Reference Figure 1-5 The gas-fired boiler system for heating and hot water supply shown includes a plate heat exchanger 100 and a smoke hood 200 covering the combustion heat exchanger. The smoke hood 200 is used to collect and discharge the high-temperature exhaust gas generated by the combustion heat exchanger. Several heating and domestic water supply pipes 300 are fixed at the exchange end of the plate heat exchanger 100. The middle part of the heating and domestic water supply pipes 300 is fixedly inserted through the side wall of the smoke hood 200.

[0034] In addition, the gas-fired heating and hot water supply dual-purpose boiler system also includes heating circulating water pumps and domestic water pumps (not shown in the figure), which are known in the prior art, to realize the functions of heating and supplying domestic hot water. The other equipment of the system are all existing technologies, and their specific structures and working principles are well known to those skilled in the art, and will not be described in detail here.

[0035] A flow-guiding heat exchange plate 1 is mounted on the heating and domestic water supply pipe 300 through a deflectable and adjustable connection structure. The flow-guiding heat exchange plate 1 is a thin plate that converges at the top. The flow-guiding heat exchange plate 1 has an integrally formed flow-gathering edge 11 protruding outward on one side edge of the flow-facing surface. The flow-guiding heat exchange plate 1 also has a flow-guiding rib 12 on the flow-facing surface to guide the high-temperature exhaust gas to the heating and domestic water supply pipe 300.

[0036] The deflectable adjustable connection structure is used to adjust the tilt angle of the heat exchange plate 1, and at the same time, the deflectable adjustable connection structure also plays a good role in heat conduction.

[0037] Based on the above structure, the heat exchange plate 1 is used to exchange heat with the high-temperature exhaust gas concentrated in the smoke hood 200. The converging edge 11 can prevent the high-temperature exhaust gas from escaping within the range of the heat exchange plate 1, and the guiding rib 12 can guide the high-temperature exhaust gas, making the high-temperature exhaust gas more concentrated. This allows for better utilization of the waste heat of the high-temperature exhaust gas and directs the heat to the heating and domestic water supply pipe 300, thereby raising the temperature of the water in the heating and domestic water supply pipe 300 or providing insulation for the water in the heating and domestic water supply pipe 300. Compared with the existing technology of applying the high-temperature exhaust gas to the periphery of the plate heat exchanger 100 for heat exchange, the heat exchange contact area is larger, resulting in higher exchange efficiency and better exchange effect. The utilization of the heat of the high-temperature exhaust gas is more efficient, thereby further improving the energy-saving waste heat and energy-saving insulation effect of the gas-fired heating and hot water supply dual-purpose boiler system.

[0038] Furthermore, by adjusting the tilt angle of the flow guide heat exchange plate 1 through the deflectable adjustable connection structure, the high-temperature exhaust gas can have different flow velocities when passing through the flow guide surface of the flow guide heat exchange plate 1. This allows the gas-fired heating and hot water supply dual-purpose boiler system to maximize the heat exchange between the high-temperature exhaust gas and the flow guide heat exchange plate 1 according to the exhaust gas discharge speed requirements, thus meeting various high-temperature exhaust gas discharge flow requirements and maximizing the utilization of high-temperature exhaust gas heat, resulting in better performance.

[0039] Furthermore, the deflectable adjustable connection structure includes:

[0040] Movable plate 2, the lower end of movable plate 2 is fixed to the upper end of heat exchange plate 1;

[0041] Fixed ball joint 3 is a ball with a through hole in the middle. Fixed ball joint 3 is fixedly sleeved on heating and domestic water supply pipe 300.

[0042] The movable plate 2 has a through hole in the middle that is compatible with the fixed ball joint 3, and the inner wall of the movable plate 2 has a micro-arc sliding wall 21 that is compatible with the spherical surface of the fixed ball joint 3. Both the movable plate 2 and the fixed ball joint 3 are made of thermally conductive materials. The thermally conductive materials are metal or non-metal materials that are commonly used in the prior art and are suitable for this embodiment with good thermal conductivity.

[0043] Adjustable components are installed on both sides of the fixed ball joint 3. The adjustable components are used to limit the rotation of the movable plate 2 or to enable the movable plate 2 to deflect perpendicularly to the axis of the heating and domestic water supply pipe 300 along the axis of the fixed ball joint 3.

[0044] The adjusting components include:

[0045] Two fastening screws 4 are provided and are respectively fixed to the front and rear ends of the fixed ball joint 3. The axis of the fastening screw 4 is perpendicular to the axis of the heating and domestic water supply pipe 300 on the horizontal plane.

[0046] Two adjusting nuts 5 are provided and are respectively screwed onto two fastening screws 4;

[0047] Both sides of the movable plate 2 are provided with limiting through holes 23 for the fastening screw 4 to pass through. When the adjusting nut 5 is screwed onto the fastening screw 4, one side abuts against the outer wall of the movable plate 2 and is fixed by friction with the fastening screw 4.

[0048] The movable plate 2, the fixed ball joint 3, and the fastening screw 4 allow the movable plate 2 to rotate along the fixed screw 4, thereby changing its angle while adhering to the fixed ball joint 3. This facilitates changing the tilt angle of the heat exchange fin 1, resulting in different flow velocities of the high-temperature exhaust gas on the flow-facing surface of the heat exchange fin 1. After changing the angle, tightening the adjusting nut 5 causes one side of the adjusting nut 5 to press against the outer wall of the movable plate 2, thus limiting the movement of the movable plate 2 and fixing the angle of the adjusted heat exchange fin 1.

[0049] Furthermore, a friction-increasing washer 6 is movably sleeved on the fastening screw 4. The friction-increasing washer 6 is an elastic rubber ring. The friction-increasing washer 6 is located between the adjusting nut 5 and the outer wall of the movable plate 2. When the adjusting nut 5 is tightened, the friction-increasing washer 6 is pressed against the outer wall of the movable plate 2 and has an interference fit with the outer wall of the movable plate 2.

[0050] By setting the friction-enhancing washer 6, when the adjusting nut 5 is tightened, the friction-enhancing washer 6 presses against the outer wall of the movable plate 2 and has an interference fit with the outer wall of the movable plate 2. This can further enhance the friction fixing strength of the movable plate 2, while avoiding damage to the movable plate 2 caused by hard compression. It can also extend the service life of the movable plate 2 while improving the fixing effect, resulting in better actual use effect.

[0051] Furthermore, a thermal grease filling cavity 22 is formed inside the movable plate 2, and thermal grease is filled inside the thermal grease filling cavity 22. An addition port 24 for filling thermal grease into the thermal grease filling cavity 22 is provided at the upper end of the movable plate 2, and a plunger 25 for sealing the addition port 24 is provided inside the addition port 24.

[0052] By filling the movable plate 2 with thermally conductive silicone grease, the heat exchanged between the heat exchange plate 1 and the high-temperature exhaust gas can be distributed more quickly and evenly on the movable plate 2, thereby being conducted more evenly to the fixed ball joint 3. This achieves comprehensive and uniform preheating or insulation of the heating and domestic water supply pipe 300, avoiding uneven heat distribution and reducing fatigue damage during long-term use.

[0053] The working principle of this utility model is as follows: During daily use, the heat exchange plate 1 is used to exchange heat with the high-temperature exhaust gas collected by the smoke hood 200. This allows for better utilization of the waste heat of the high-temperature exhaust gas and directs the heat to the heating and domestic water supply pipe 300, thereby raising the temperature of the water in the heating and domestic water supply pipe 300 or providing insulation for the water in the heating and domestic water supply pipe 300. Compared with the prior art where the high-temperature exhaust gas is applied to the periphery of the plate heat exchanger 100 for heat exchange, this model has a larger heat exchange contact area, resulting in higher exchange efficiency and better exchange effect. The utilization of heat from the high-temperature exhaust gas is more efficient, thereby further improving the energy-saving waste heat and energy-saving insulation effect of the gas-fired heating and hot water supply dual-purpose boiler system.

[0054] Furthermore, the tilt angle of the heat exchange fin 1 can be adjusted via a deflectable adjustable connection structure. During installation, by pulling the heat exchange fin 1 or the movable plate 2, the movable plate 2 rotates along the fixed screw 4, thereby changing its angle while adhering to the fixed ball joint 3. This facilitates changing the tilt angle of the heat exchange fin 1. After changing the angle, tightening the adjusting nut 5 causes one side of the adjusting nut 5 to press against the outer wall of the movable plate 2, thus limiting the movement of the movable plate 2 and fixing the adjusted angle of the heat exchange fin 1. This allows high-temperature exhaust gas to flow at different velocities as it passes through the flow-guiding surface of the heat exchange fin 1. Consequently, this gas-fired heating and hot water boiler system can maximize the heat exchange between the high-temperature exhaust gas and the heat exchange fin 1 according to the exhaust gas discharge speed requirements, accommodating various high-temperature exhaust gas discharge flow requirements and maximizing the utilization of high-temperature exhaust gas heat, resulting in better performance.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas-fired boiler system for both heating and hot water supply, comprising a plate heat exchanger (100) and a smoke hood (200) covering the combustion heat exchanger, wherein the smoke hood (200) is used to collect and discharge the high-temperature exhaust gas generated by the combustion heat exchanger, and a plurality of heating and domestic water supply pipes (300) are fixedly attached to the exchange end of the plate heat exchanger (100), wherein the middle portion of the heating and domestic water supply pipes (300) is fixedly inserted through the side wall of the smoke hood (200), characterized in that: The heating and domestic water supply pipe (300) is equipped with a flow-guiding heat exchange plate (1) through a deflectable and adjustable connection structure. The flow-guiding heat exchange plate (1) is a thin plate that is tapered at the top. The flow-guiding heat exchange plate (1) has an integrally formed flow-gathering edge (11) protruding outward on one side edge of the flow-facing side. The flow-guiding heat exchange plate (1) is also provided with a flow-guiding rib (12) on the flow-facing side to guide the high-temperature exhaust gas to the heating and domestic water supply pipe (300). The deflectable adjustable connection structure is used to adjust the tilt angle of the heat exchange plate (1), and the deflectable adjustable connection structure also plays a good role in heat conduction.

2. The gas-fired heating and hot water supply dual-purpose boiler system according to claim 1, characterized in that: The deflectable adjustable connection structure includes: Movable plate (2), the lower end of which is fixed to the upper end of the heat exchange plate (1); Fixed ball knot (3), the fixed ball knot (3) is a ball with a through hole in the middle, the fixed ball knot (3) is fixedly sleeved on the heating and domestic water supply pipe (300); The movable plate (2) has a through hole in the middle that is compatible with the fixed ball joint (3), and the inner wall of the movable plate (2) has a micro-arc sliding wall (21) that is compatible with the spherical surface of the fixed ball joint (3). Both the movable plate (2) and the fixed ball joint (3) are made of thermally conductive material. Adjustment members are installed on both sides of the fixed ball joint (3). The adjustment members are used to restrict the rotation of the movable plate (2) or to enable the movable plate (2) to deflect perpendicularly to the axis of the heating and domestic water supply pipe (300) along the axis of the fixed ball joint (3).

3. A gas-fired heating and hot water supply dual-purpose boiler system according to claim 2, characterized in that: The adjusting element includes: Two fastening screws (4) are provided and are respectively fixed to the front and rear ends of the fixed ball joint (3). The axis of the fastening screws (4) is perpendicular to the axis of the heating and domestic water supply pipe (300) on the horizontal plane. Adjusting nuts (5), two of which are screwed onto two fastening screws (4); Both sides of the movable plate (2) are provided with limiting through holes (23) for the fastening screw (4) to move through. When the adjusting nut (5) is screwed onto the fastening screw (4), one side abuts against the outer wall of the movable plate (2) and is fixed by friction with the fastening screw (4).

4. A gas-fired heating and hot water supply dual-purpose boiler system according to claim 3, characterized in that: A friction-enhancing washer (6) is movably sleeved on the fastening screw (4). The friction-enhancing washer (6) is an elastic rubber ring. The friction-enhancing washer (6) is located between the adjusting nut (5) and the outer wall of the movable plate (2). When the adjusting nut (5) is tightened, the friction-enhancing washer (6) is pressed against the outer wall of the movable plate (2) and has an interference fit with the outer wall of the movable plate (2).

5. A gas-fired heating and hot water supply dual-purpose boiler system according to claim 2, characterized in that: A thermal grease filling cavity (22) is formed inside the movable plate (2), and the thermal grease filling cavity (22) is filled with thermal grease.

6. A gas-fired heating and hot water supply dual-purpose boiler system according to claim 5, characterized in that: The upper end of the movable plate (2) is provided with an addition port (24) for filling the thermal grease filling cavity (22) with thermal grease. A plunger (25) is provided inside the addition port (24) to seal the addition port (24).

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