A heat exchange device for powering a gas-fired boiler.

Abstract

This invention relates to the field of heat exchange equipment technology, and discloses a heat exchange device for a gas-fired boiler, comprising: a heat exchange box containing heat exchange tubes with a plurality of heat exchange fins connected by heat-conducting fins; a cleaning block slidably mounted on the heat exchange fins with a cleaning brush mounted on its surface facing the fins; and a drive assembly installed inside the heat exchange box. The heat-conducting fins reduce the temperature difference between the fins facing the wind and those facing away from the wind. After a period of use, the drive assembly drives the cleaning block to rotate, causing it to slide on the surface of the heat exchange fins to clean the dirt adhering to the fins, ensuring that each fin is clean and that the fins can conduct heat effectively, thus preventing uneven temperature distribution between the fins in different areas and effectively improving the heat exchange efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, and more specifically to a heat exchange device for powering a gas-fired boiler. Background Technology

[0002] In gas-fired boilers, fuel combustion produces high-temperature flue gas, which transfers heat to the working medium, typically water or steam, via a heat exchanger. Currently, the heat exchanger is one of the core components of a gas-fired boiler, and its design and optimization directly affect the performance and efficiency of the entire system.

[0003] Existing gas-fired boiler equipment typically includes heat exchange tubes and heat exchange fin assemblies. Heat exchange fins are metal plates attached to the surface of heat exchange tubes. Their main function is to improve heat exchange efficiency by increasing the heat transfer surface area. However, in actual use, the temperature of different locations on the heat exchange fins is not the same. Since the windward side is in direct contact with the airflow, the leeward side, because the airflow has undergone heat exchange for a period of time, has a temperature difference with the windward side. This temperature difference will lead to uneven temperature distribution on the surface of the fins.

[0004] Currently, there are some existing technologies that can reduce the temperature difference between different areas of heat exchange fins. For example, patent publication number CN207163262U mainly uses multiple heat exchange fins stacked together and baffles, through holes, and diverters on the heat exchange fins to extend the residence time of the airflow outside the heat exchange tube, thereby increasing the heat exchange area. Analysis shows that the drawback of this technical solution is that after long-term use, dirt will accumulate on the surface of the heat exchange fins. This dirt will affect the heat exchange performance of the heat exchange fins and cause uneven temperature distribution in different locations, thus affecting the heat exchange effect of the heat exchange device. Based on this, the present invention provides a heat exchange device for gas boiler equipment with a simple and ingenious structure that can ensure that dirt does not adhere to the surface of the heat exchange fins, thus preventing uneven temperature between the heat exchange fins in different locations. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a heat exchange device for the power of a gas-fired boiler, thereby solving the technical problem of uneven temperature between heat exchange fins caused by the accumulation of dirt on the surface of the heat exchange fins.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A heat exchange device for powering a gas-fired boiler includes:

[0008] A heat exchange box is provided, in which heat exchange tubes are installed and several heat exchange fins are installed on the heat exchange tubes. The heat exchange fins are connected to each other by heat-conducting fins. An air inlet pipe and an air outlet pipe are respectively connected to both sides of the heat exchange box.

[0009] A cleaning block, slidably mounted on heat exchange fins, has a cleaning brush mounted on its surface facing the heat exchange fins, the cleaning brush contacting the surface of the heat exchange fins; and

[0010] The drive assembly, installed inside the heat exchange box, is used to drive the cleaning block to rotate back and forth.

[0011] As a further aspect of the present invention: the water inlet pipe of the heat exchange tube is arranged through the side where the heat exchange box is connected to the air outlet pipe, and the water outlet pipe of the heat exchange tube is arranged through the side where the heat exchange box is connected to the air inlet pipe.

[0012] As a further aspect of the present invention: a plurality of inclined guide plates are installed inside the heat exchange box, and the distance between the end of the guide plate near the outlet pipe and the heat exchange tube is smaller than the distance between the end of the guide plate away from the outlet pipe and the heat exchange tube.

[0013] As a further aspect of the present invention: two wiping cloths are respectively provided on both sides of the cleaning brush, and the wiping cloths are installed on the cleaning block.

[0014] As a further aspect of the present invention: each heat exchange fin is provided with two cleaning blocks, and the two cleaning blocks are arranged symmetrically.

[0015] As a further aspect of the present invention: the driving component includes:

[0016] The housing is fixed inside the heat exchange box, and a rotating wheel is rotatably installed inside the housing. The rotating wheel is driven to rotate by a drive source installed inside the housing.

[0017] A rack is slidably installed inside the housing. The rack is rotatably connected to one end of a connecting rod, and the other end of the connecting rod is rotatably connected to the eccentric position of the rotating wheel.

[0018] A gear, which is rotatably mounted inside a housing and meshes with a rack; and

[0019] A connecting rod is used to connect several cleaning blocks on the same side of several heat exchange fins at the same height. Two connecting rods on both sides of several heat exchange fins at the same height are connected to a transmission wheel. Several transmission wheels are connected by a linkage, and one of the transmission wheels is coaxially and fixedly connected to a gear.

[0020] As a further aspect of the present invention, the connecting rod is provided with a plurality of through holes.

[0021] As a further aspect of the present invention: the drive assembly further includes a gas guide pipe that runs through the housing, and the gas guide pipe is provided with a solenoid valve for controlling its opening and closing. A gas sensor is installed inside the housing, and the gas sensor is connected to the drive source and the solenoid valve.

[0022] As a further embodiment of the present invention: the housing is installed on the side wall where the heat exchange box is connected to the air inlet pipe.

[0023] The beneficial effects of this invention are:

[0024] (1) In this invention, the temperature difference between the heat-conducting fins at the windward side and the heat-conducting fins at the leeward side can be reduced by setting the heat-conducting fins. After a period of use, the drive component drives the cleaning block to rotate, so that it slides on the surface of the heat exchange fins to clean the dirt attached to the surface of the heat exchange fins, ensuring that each heat exchange fin is clean, so that the heat exchange fins can conduct heat fully, thereby ensuring that there is no temperature unevenness between the heat exchange fins in each area, effectively improving the heat exchange efficiency of the device.

[0025] (2) In this invention, the flow direction of flue gas is opposite to that of water flow, so that the water flow entering the heat exchange tube will be preheated by the flue gas that is being used for heat exchange. When it flows to the inlet pipe, the high-temperature flue gas that has just entered the heat exchange box will heat it. This arrangement can make full use of the waste heat of flue gas and avoid heat loss during the flow after heat exchange caused by the flue gas flow direction being the same as that of water flow. The arrangement of the guide plate can gather the flue gas that has not been discharged after heat exchange, increase the contact area between this part of the flue gas and the heat exchange tube and extend the contact time between the two, further make full use of the waste heat of flue gas, so as to improve the heat exchange efficiency of the heat exchange device.

[0026] (3) In this invention, when the heat exchange has been running for a period of time, if cleaning is required, the solenoid valve is opened by the external controller, and some flue gas enters the box through the air guide pipe. The flue gas sensor detects the flue gas and sends a signal to the external controller. After calculating the flue gas flow rate, the external controller can control the rotation speed of the drive source output end, thereby controlling the rotation speed of the cleaning block. This enables the cleaning rate to be adjusted adaptively according to the flue gas flow rate, reducing the impact of the cleaning block rotation on the heat exchange efficiency. Attached Figure Description

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a schematic diagram of the heat exchange tube structure in this invention;

[0030] Figure 3 In this invention Figure 2A magnified schematic diagram of the structure at point A;

[0031] Figure 4 This is a schematic diagram of the driving component in this invention;

[0032] Figure 5 This is a schematic diagram of the connecting rod in this invention.

[0033] In the diagram: 1. Heat exchange box; 2. Heat exchange tube; 3. Water inlet pipe; 4. Water outlet pipe; 5. Air inlet pipe; 6. Air outlet pipe; 7. Heat exchange fins; 8. Heat conduction fins; 9. Cleaning block; 10. Cleaning brush; 11. Wiping cloth; 12. Drive assembly; 1201. Box body; 1202. Rotary wheel; 1203. Drive source; 1204. Connecting rod; 1205. Rack; 1206. Gear; 1207. Air guide pipe; 1208. Solenoid valve; 1209. Linkage component; 1210. Transmission wheel; 1211. Connecting rod; 13. Through hole; 14. Guide plate. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-5 As shown, the present invention is a heat exchange device for powering a gas-fired boiler, comprising:

[0036] A heat exchange box 1 is provided, in which heat exchange tubes 2 are installed, and a plurality of heat exchange fins 7 are installed on the heat exchange tubes 2. The plurality of heat exchange fins 7 are connected to each other by heat-conducting fins 8. An air inlet pipe 5 and an air outlet pipe 6 are respectively connected to the two sides of the heat exchange box 1.

[0037] A cleaning block 9 is slidably mounted on the heat exchange fins 7, and a cleaning brush 10 is mounted on its surface facing the heat exchange fins 7, the cleaning brush 10 contacting the surface of the heat exchange fins 7; and

[0038] The drive assembly 12, which is installed inside the heat exchange box 1, is used to drive the cleaning block 9 to rotate back and forth.

[0039] In one embodiment, the heat exchange tube 2 is arranged vertically, and several heat-conducting fins 8 are provided on its surface at different heights, and adjacent heat-conducting fins 8 are connected by the heat-conducting fins 8.

[0040] In practical application, water flows through the heat exchange tube 2, and high-temperature flue gas is introduced into the heat exchange box 1 through the air inlet pipe 5. After heat exchange with the water in the heat exchange tube 2, the high-temperature flue gas is discharged through the air outlet pipe 6. The setting of the heat-conducting fins 8 can reduce the temperature difference between the heat-conducting fins 8 at the windward side and the heat-conducting fins 8 at the leeward side. After a period of use, the drive component 12 drives the cleaning block 9 to rotate, so that it slides on the surface of the heat exchange fins 7 to clean the dirt attached to the surface of the heat exchange fins 7, ensuring that each heat exchange fin 7 is in a clean state, so that the heat exchange fins 7 can conduct heat fully, thereby ensuring that there is no temperature unevenness between the heat exchange fins 7 in each area, effectively improving the heat exchange efficiency of the device.

[0041] like Figures 1-3 As shown, in a preferred embodiment of the present invention, the water inlet pipe 3 of the heat exchange tube 2 is arranged through the side where the heat exchange box 1 is connected to the air outlet pipe 6, and the water outlet pipe 4 of the heat exchange tube 2 is arranged through the side where the heat exchange box 1 is connected to the air inlet pipe 5.

[0042] In one embodiment, the heat exchange box 1 is equipped with several inclined guide plates 14, and the distance between the end of the guide plate 14 near the outlet pipe 6 and the heat exchange tube 2 is less than the distance between the end of the guide plate 14 away from the outlet pipe 6 and the heat exchange tube 2.

[0043] In practical applications, this embodiment uses... Figure 1 Taking the direction shown as an example, the flue gas flows from bottom to top, and the water flows from top to bottom, that is, the flow direction of the flue gas is opposite to that of the water. In this way, the water flowing into the heat exchange tube 2 will be heated by the flue gas, which is preheating. When it flows to the inlet pipe 5, the high-temperature flue gas that just entered the heat exchange box 1 heats it. This setting can make full use of the waste heat of the flue gas and avoid heat loss during the flow after heat exchange caused by the flue gas flow direction being the same as the water flow direction. The arrangement of the guide plate 14 can gather the flue gas that has not been discharged after heat exchange, increase the contact area between this part of the flue gas and the heat exchange tube 2 and extend the contact time between the two, further making full use of the waste heat of the flue gas and improving the heat exchange efficiency of the heat exchange device.

[0044] like Figure 3 As shown, in a preferred embodiment of the present invention, two wiping cloths 11 are respectively provided on both sides of the cleaning brush 10, and the wiping cloths 11 are mounted on the cleaning block 9.

[0045] In practical application, during the reciprocating rotation of the cleaning block 9, the area of ​​the heat exchange fins 7 that comes into contact with the cleaning brush 10 then comes into contact with the wiping cloth 11, which can further clean the dirt off the brush and improve the cleaning efficiency of the surface of the heat exchange fins 7.

[0046] like Figures 1-5As shown, in a preferred embodiment of the present invention, each heat exchange fin 7 is provided with two cleaning blocks 9, and the two cleaning blocks 9 are arranged symmetrically.

[0047] In one embodiment, the driving component 12 includes:

[0048] The housing 1201 is fixed inside the heat exchange box 1, and a rotating wheel 1202 is rotatably installed inside it. The rotating wheel 1202 is driven to rotate by a drive source 1203 installed inside the housing 1201.

[0049] A rack 1205 is slidably installed inside a housing 1201. The rack 1205 is rotatably connected to one end of a connecting rod 1204, and the other end of the connecting rod 1204 is rotatably connected to the eccentric position of a rotating wheel 1202.

[0050] Gear 1206, rotatably mounted within housing 1201, meshes with rack 1205; and

[0051] The connecting rod 1211 connects several heat exchange fins 7 at the same height to several cleaning blocks 9 on the same side. The two connecting rods 1211 on both sides of the heat exchange fins 7 at the same height are connected to a transmission wheel 1210. The several transmission wheels 1210 are connected to each other by a linkage 1209, and one of the transmission wheels 1210 is coaxially and fixedly connected to a gear 1206.

[0052] The driving source 1203 can be a motor assembly, a gear assembly or a pulley assembly driven by a motor, as long as it can make the rotating wheel 1202 rotate. This embodiment does not make specific limitations here. The housing 1201 is provided with a sliding groove that slides with the rack 1205. The linkage 1209 can be a number of belts, or other structural components that can achieve linkage rotation, which will not be described in detail here.

[0053] In practical application, the drive source 1203 drives the rotating wheel 1202 to rotate, which in turn drives the connecting rod 1204 to swing. Since the rack 1205 is guided by the groove on the housing 1201, the swing of the connecting rod 1204 drives the rack 1205 to reciprocate and translate, which in turn drives the gear 1206 to reciprocate and rotate. The transmission wheel 1210 connected to the gear 1206 then reciprocates and rotates synchronously. Through the linkage 1209, other transmission wheels 1210 can be driven to reciprocate and rotate synchronously, realizing the synchronous reciprocating and rotating of several connecting rods 1211. Thus, several cleaning blocks 9 can slide on the surface of the heat exchange fins 7 to achieve cleaning.

[0054] like Figure 3As shown, in a preferred embodiment of the present invention, the connecting rod 1211 is provided with a plurality of through holes 13; in practical applications, the through holes 13 can allow flue gas to pass through, which can avoid the problem of reduced flue gas flow efficiency leading to a decrease in the heat exchange efficiency of the heat exchange device.

[0055] like Figures 1-5 As shown, in a preferred embodiment of the present invention, the drive assembly 12 further includes a gas guide pipe 1207 that runs through the housing 1201, and a solenoid valve 1208 for controlling its opening and closing is provided on the gas guide pipe 1207. A gas sensor is installed inside the housing 1201, and the gas sensor is connected to the drive source 1203 and to the solenoid valve 1208.

[0056] In one embodiment, the housing 1201 is mounted on the side wall connecting the heat exchange box 1 and the air inlet pipe 5, and the lowest transmission wheel 1210 is coaxially and fixedly connected to the gear 1206.

[0057] The solenoid valve 1208, drive source 1203 and other electrical components are all connected to an external controller. The external controller is existing technology and has not been improved in this application. Therefore, it is not necessary to disclose its specific mechanical structure and circuit structure, and this does not affect the integrity of this application.

[0058] In practical application, when cleaning is required after heat exchange has been running for a period of time, the solenoid valve 1208 is opened by the external controller. Some flue gas then enters the housing 1201 through the air guide pipe 1207. The flue gas sensor detects the flue gas and sends a signal to the external controller. After calculating the flue gas flow rate, the external controller can control the rotation speed of the output terminal of the drive source 1203, thereby controlling the rotation speed of the cleaning block 9. This allows for adaptive adjustment of the cleaning rate according to the flue gas flow rate, reducing the impact of the rotation of the cleaning block 9 on the heat exchange efficiency.

[0059] Working principle of the invention: The above embodiments of the invention provide a heat exchange device for a gas-fired boiler. By setting the heat-conducting fins 8, the temperature difference between the heat-conducting fins 8 at the windward side and the heat-conducting fins 8 at the leeward side can be reduced. After a period of use, the drive component 12 drives the cleaning block 9 to rotate, so that it slides on the surface of the heat exchange fins 7 to clean the dirt attached to the surface of the heat exchange fins 7, ensuring that each heat exchange fin 7 is in a clean state, so that the heat exchange fins 7 can conduct heat fully, thereby ensuring that there is no temperature unevenness between the heat exchange fins 7 in each area, effectively improving the heat exchange efficiency of the device.

[0060] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A heat exchange device for powering a gas-fired boiler, characterized in that, include: A heat exchange box (1) is installed inside a heat exchange tube (2), and a number of heat exchange fins (7) are installed on the heat exchange tube (2). The number of heat exchange fins (7) are connected to each other by heat-conducting fins (8). An air inlet pipe (5) and an air outlet pipe (6) are respectively connected to the two sides of the heat exchange box (1). A cleaning block (9) is slidably mounted on a heat exchange fin (7), and a cleaning brush (10) is mounted on its surface facing the heat exchange fin (7), the cleaning brush (10) contacting the surface of the heat exchange fin (7); and The drive assembly (12), which is installed inside the heat exchange box (1), is used to drive the cleaning block (9) to rotate back and forth; The water inlet pipe (3) of the heat exchange tube (2) is laid through and connected to the heat exchange box (1) and the air outlet pipe (6) on the same side. The water outlet pipe (4) of the heat exchange tube (2) is laid through and connected to the heat exchange box (1) and the air inlet pipe (5) on the same side. The heat exchange box (1) is equipped with several inclined guide plates (14), and the distance between the end of the guide plate (14) near the outlet pipe (6) and the heat exchange tube (2) is smaller than the distance between the end of the guide plate (14) away from the outlet pipe (6) and the heat exchange tube (2). The driving component (12) includes: The housing (1201) is fixed inside the heat exchange box (1), and a rotating wheel (1202) is rotatably installed inside it. The rotating wheel (1202) is driven to rotate by a drive source (1203) installed inside the housing (1201). A rack (1205) is slidably installed inside a housing (1201). The rack (1205) is rotatably connected to one end of a connecting rod (1204), and the other end of the connecting rod (1204) is rotatably connected to the eccentric position of a rotating wheel (1202). A gear (1206) is rotatably mounted within a housing (1201) and meshes with a rack (1205); and The connecting rod (1211) connects several cleaning blocks (9) on the same side of several heat exchange fins (7) at the same height. The two connecting rods (1211) on both sides of several heat exchange fins (7) at the same height are connected to a transmission wheel (1210). The several transmission wheels (1210) are connected by a linkage (1209), and one of the transmission wheels (1210) is coaxially fixedly connected to a gear (1206). The drive assembly (12) also includes a gas duct (1207) that runs through the housing (1201), and a solenoid valve (1208) for controlling its opening and closing is provided on the gas duct (1207). A gas sensor is installed inside the housing (1201), and the gas sensor is connected to the drive source (1203) and to the solenoid valve (1208). The enclosure (1201) is installed on the side wall where the heat exchange box (1) is connected to the air inlet pipe (5).

2. The heat exchange device for powering a gas-fired boiler according to claim 1, characterized in that, Two wiping cloths (11) are respectively provided on both sides of the cleaning brush (10), and the wiping cloths (11) are installed on the cleaning block (9).

3. The heat exchange device for powering a gas-fired boiler according to claim 1, characterized in that, Each heat exchange fin (7) is provided with two cleaning blocks (9), and the two cleaning blocks (9) are arranged symmetrically.

4. The heat exchange device for powering a gas-fired boiler according to claim 1, characterized in that, The connecting rod (1211) has several through holes (13) arranged through it.

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