Firepower adjusting device of gas combustion heat exchanger

Abstract

The invention discloses a firepower adjusting device of a fuel gas combustion heat exchanger, which is a divisional application with the patent application number of 202110778027.3. According to the firepower adjusting device, a fuel gas inlet hole is formed in a shell, a fire distributor is connected to the shell, and the fire distributor surrounds the fuel gas inlet hole; a fire hole covering plate is movably connected between the fire distributor and the back face of the shell through a coupling device to adjust the area of fire distribution holes. A driving device is fixedly installed on the front face of the shell in a sealed mode. A shaft body of the driving device stretches out and draws back to control the fire distribution holes of the fire hole covering plate to close part and completely open the fire distribution holes to adjust the fire power of the fire distributor. The coupling device comprises positioning guide columns arranged at the left and right ends of the fire distributor or the left and right ends of the reverse side of the shell and positioning through holes formed in the left and right ends of the fire hole covering plate, and the positioning guide columns penetrate through the positioning through holes, so that the fire hole covering plate is movably connected between the fire distributor and the reverse side of the shell; the gas area of the fire distribution holes is adjusted through the coupling device so as to adjust the combustion power and the water temperature, and therefore gas can be saved.

Description

Technical Field

[0001] This invention is a divisional application of patent application number 202110778027.3, entitled "A Firepower Adjustment Device for a Gas Combustion Heat Exchanger".

[0002] This invention relates to a firepower regulation device for gas-fired wall-hung water heaters, and more particularly to a firepower regulation device for a gas combustion heat exchanger. Background Technology

[0003] In northern regions, autumn and winter are long and cold. Gas-fired wall-hung water heaters serve both heating and domestic hot water needs. Households typically use these, usually high-power models ranging from 40kW to 60kW. The heat output of a gas-fired wall-hung water heater is adjusted by controlling the mixing flow of gas and air. The difference between high and low heat output is approximately 50%, as the number of burner holes determines the minimum operating power. If the power output is lower than the set value, the gas flow will be insufficient for ignition. Therefore, even at the lowest heat output, it is suitable for winter heating. However, due to the significant temperature difference between winter and summer in northern regions, especially in summer when heating is not needed and only domestic hot water is required, even at the lowest heat output of a high-power gas-fired wall-hung water heater, the hot water temperature is too high. This necessitates mixing with cold water to adjust the temperature, resulting in gas waste and the inability to further adjust the water temperature. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a gas combustion heat exchanger with a reasonable structural design that can further adjust and reduce the combustion power on the basis of the original high-power gas wall-hung boiler water heater operating at minimum power, making it more suitable for use in summer.

[0005] The solution to the above technical problem is as follows:

[0006] A firepower adjustment device for a gas combustion heat exchanger includes a shell and a burner. The shell has a gas inlet, and the burner is fixedly connected to the reverse side of the shell. The burner has a plurality of burner holes that surround the gas inlet. The device is characterized in that: a burner hole cover plate is movably connected to the burner and the reverse side of the shell via a coupling device, and the burner hole cover plate can cover one-third to two-thirds of the area of ​​the burner holes; a drive device is fixedly and sealed on the front side of the shell, and the shaft of the drive device passes through the shell and is movably coupled to the burner hole cover plate. The firepower of the burner is adjusted by controlling the extension and retraction of the shaft of the drive device to close or fully open the burner holes of the burner hole cover plate.

[0007] The coupling device includes positioning guide posts set at the left and right ends of the fire distributor or at the left and right ends of the reverse side of the outer shell, and positioning through holes set at the left and right ends of the fire hole cover plate. The positioning guide posts are connected to the positioning through holes, so that the fire distributor and the reverse side of the outer shell are movably connected by the fire hole cover plate.

[0008] The beneficial effects of the firepower adjustment device for a gas combustion heat exchanger of the present invention are as follows: This product has a flame hole cover plate movably connected between the burner and the opposite side of the outer shell through a coupling device. Depending on the model / production needs, the flame hole cover plate can be set to cover one-third to two-thirds of the area of ​​the flame hole; this is due to the reasonable setting of the flexible working structure of the coupling device; during operation, the drive device pulls the flame hole cover plate in a linear motion through its shaft to fully open the flame hole, and pushes the flame hole cover plate in a linear motion to close the flame hole; under the condition of the original gas wall-hung boiler water heater operating at minimum power, by adding a flame hole cover plate to cover part of the flame hole, a lower combustion firepower can be adjusted, and the power combustion can be reduced, which is more suitable for summer use and more suitable for summer water temperature, thus saving gas. Attached Figure Description

[0009] Figure 1 This is a perspective view of the flame distributor of the present invention;

[0010] Figure 2 This is a bottom view of the flame distributor of the present invention;

[0011] Figure 3 A top view of the fire distributor of the present invention with a fire hole cover plate installed;

[0012] Figure 4 A perspective view of the flame distributor of the present invention with a flame hole cover plate installed;

[0013] Figure 5 This is a front view of the fire hole cover plate of the product of the present invention;

[0014] Figure 6 A perspective view of the flame distributor of the present invention with a flame hole cover plate installed;

[0015] Figure 7 A top view of the fire distributor of the present invention with a fire hole cover plate installed;

[0016] Figure 8 This is a top view of the flame distributor of the present invention;

[0017] Figure 9 This is a top view of the fire hole cover plate of the present invention;

[0018] Figure 10 This is a cross-sectional view of the product of the present invention with the fire hole cover plate covering the fire distribution plate and closing the fire distribution hole;

[0019] Figure 11This is a cross-sectional view of the fire hole cover plate of the product of the present invention with the fire hole fully open.

[0020] Figure 12 This is a cross-sectional view of the product of the present invention with the fire hole cover plate covering the fire distribution plate and closing the fire distribution hole;

[0021] Figure 13 This is a cross-sectional view of the fire hole cover plate of the product of the present invention with the fire hole fully open.

[0022] Figure 14 A side view of the fire distributor of the present invention with the housing installed;

[0023] Figure 15 A cross-sectional view of the fire distributor of the present invention with its housing installed;

[0024] Figure 16 This is a cross-sectional view of the igniter of the present invention installed on the outer casing, with the ignition hole cover plate covering the ignition plate and closing the ignition hole;

[0025] Figure 17 This is a cross-sectional view of the ignition distributor of the present invention installed on the outer casing with the ignition hole cover plate fully open.

[0026] Figure 18 This is a cross-sectional view of the igniter of the present invention installed on the outer casing, with the ignition hole cover plate covering the ignition plate and closing the ignition hole;

[0027] Figure 19 This is a cross-sectional view of the ignition distributor of the present invention installed on the outer casing with the ignition hole cover plate fully open.

[0028] Figure 20 , Figure 21 This is a perspective view of the outer casing of the product of the present invention;

[0029] Figure 22 This is a perspective view of the fire distributor of the present invention mounted on the housing;

[0030] Figure 23 This is a cross-sectional view of embodiment 3 of the product of the present invention;

[0031] Figure 24 This is a cross-sectional view of embodiment 4 of the product of the present invention;

[0032] Figure 25 , Figure 26 This is a schematic diagram of the fire control device of the present invention equipped with a pressure return spring.

[0033] Heat exchange bottom shell A, combustion chamber B, gas heat exchange channel C, flue gas vent D, water inlet connector E, water outlet connector F; outer shell 1, gas inlet 11, gas diffusion and distribution chamber 12, flame divider 2, flame distribution hole 201, rectangular frame 21, flame distribution plate 22, gas distribution chamber 23, coupling device 3, flame hole cover plate 4, rotating shaft 31, shaft hole 32, positioning guide post 3A, positioning through hole 3B, pressure return spring 401, drive device 5, movable joint 51, screw device 5A, threaded pipe 5A1, screw 5A1, pressure return spring 6. Detailed Implementation

[0034] A fire control device for a gas combustion heat exchanger includes a shell 1 and a burner 2. The shell 1 has a gas inlet 11 (for external gas to enter). The burner 2 is fixedly connected to the reverse side of the shell 1 (the burner 2 is actually located in the combustion chamber of the gas combustion heat exchanger, hence it is installed on the reverse side of the shell 1). The burner 2 has several burner holes 201 (for diffusion combustion and increasing the combustion area to improve heat exchange efficiency). The burner holes 201 are rectangular or circular in shape. The burner 2 surrounds the gas inlet 11, ensuring that the gas entering through the gas inlet 11 can only be ejected and burned through the burner holes 201. A flame hole cover plate 4 is movably connected between the burner 2 and the reverse side of the shell 1 via a coupling device 3. The coupling device 3 is used to set up a flame hole cover plate 4. The connection structure of the auxiliary opening and closing of the flame hole cover plate 4 is reasonable. The flame hole cover plate 4 can cover one-third to two-thirds of the area of ​​the flame hole 201 (the size of the flame hole cover plate 4 to cover the area of ​​the flame hole 201 is produced according to the needs, for example, flame hole cover plates 4 covering 40%, 50%, 60%, 70%, etc. are produced); the front of the outer shell 1 is sealed and fixedly installed with a drive device 5 (the drive device 5 is not limited to electric or manual). The shaft of the drive device 5 passes through the shell and is movably coupled to the middle of the flame hole cover plate 4 (the movable coupling connection provides space for the flame hole cover plate 4 to flip or extend). The flame intensity of the flame distributor 2 is adjusted by controlling the extension and retraction of the shaft of the drive device 5 to close the flame hole 201 and fully open the flame hole 201.

[0035] For example: Under normal conditions, the control drive device 5 retracts and pulls open the fire hole cover plate 4 through its shaft to fully open the fire hole 201. The wall-mounted boiler water heater is calculated at 100% of its maximum working power, which is suitable for home heating (heating) and domestic hot water use in autumn and winter. It is operating at maximum power. The minimum working power is calculated at 50% of the maximum working power. Even if it is operating at the minimum power, it is still suitable for home heating (heating) and domestic hot water use in autumn and winter.

[0036] In summer, the control drive device 5 extends through its shaft to push the fire hole cover plate 4 to close part of the fire hole 201, for example, closing 50% of the fire hole 201 area. At this time, the maximum working power of the wall-hung boiler water heater becomes 50% of the original, and the power operation is reduced by 50%. With the power operation reduced by 50%, the gas volume can be further reduced to adjust to an even lower power operation (for example, a further reduction of 20%). At this time, only the original 30% power is running. After adjustment, the wall-hung boiler water heater does not operate for home heating (heating), and is only suitable for domestic hot water use. This can save gas and reduce the heating water temperature.

[0037] Further: The power adjustment device of this gas combustion heat exchanger can be set to a power of 10KW to 100KW.

[0038] Furthermore, the coupling device 3 is a hinged device.

[0039] Further: The hinge device includes a rotating shaft 31 connected to the left and right ends of the bottom edge of the flame hole cover plate 4 and shaft holes 32 provided at the left and right ends of the reverse side of the outer casing 1 or the left and right ends of the bottom edge of the flame distributor 2. The rotating shaft 31 at the left and right ends respectively passes through the shaft holes 32 at the corresponding left and right ends, so that the flame hole cover plate 4 is movably arranged between the flame distributor 2 and the reverse side of the outer casing 1. This is to reasonably set the flexible working structure of the coupling device 3. When working, the drive device 5 pulls the flame hole cover plate 4 through its shaft to flip and fully open the flame distributor 201, and pushes the flame hole cover plate 4 to flip and close the flame distributor 201.

[0040] Further: The coupling device 3 includes positioning guide posts 3A disposed at the left and right ends of the flame distributor 2 or at the left and right ends of the reverse side of the outer casing 1, and positioning through holes 3B disposed at the left and right ends of the flame hole cover plate 4. The positioning guide posts 3A pass through the positioning through holes 3B, thereby allowing the flame hole cover plate 4 to be movably disposed between the flame distributor 2 and the reverse side of the outer casing 1. This is to reasonably set the flexible working structure of the coupling device 3. During operation, the drive device 5 pulls the flame hole cover plate 4 linearly through its shaft to fully open the flame distributor 201, and pushes the flame hole cover plate 4 linearly to close the flame distributor 201.

[0041] Furthermore: the positioning guide post 3A and the positioning through hole 3B can be interchanged, that is: the positioning through hole 3B is set at the left and right ends of the fire distributor 2 or the left and right ends of the reverse side of the outer casing 1, and the positioning guide post 3A is set at the left and right ends of the fire hole cover plate 4.

[0042] Furthermore, the coupling device 3 can be a metal guide rail, a dovetail groove device, a damping device, or a cylinder device, etc., and is not limited to the flexible working structure of the coupling device 3 described above.

[0043] Further: The drive device 5 is a power device; the power device is an electric device; the electric device is a DC motor; the DC motor is a stepper motor.

[0044] Further: The flame distributor 2 is rectangular in shape, adapting to the shape of the combustion chamber of the gas-fired wall-mounted boiler, and the flame distribution shape is reasonably arranged; the flame distributor 2 includes a rectangular frame 21 and a flame distribution plate 22, the periphery of the flame distribution plate 22 is connected to the bottom edge of the rectangular frame 21 (the flame distributor 2 can also be integrally formed), a rectangular gas distribution cavity 23 is formed between the rectangular frame 21 and the flame distribution plate 22, the flame hole cover plate 4 is set in the gas distribution cavity 23, the flame hole cover plate 4 is rectangular, the flame hole cover plate 4 is placed to match the shape of the gas distribution cavity 23, the length of the flame hole cover plate 4 is equivalent to the length of the gas distribution cavity 23, and the bottom edge of the flame hole cover plate 4 is close to and parallel to the bottom edge of the gas distribution cavity 23; the flame distribution plate 22 is provided with a plurality of flame distribution holes 201.

[0045] Furthermore, the shaft end of the drive device 5 is movably coupled to the fire hole cover plate 4 via a connecting movable joint 51.

[0046] Furthermore, the shaft of the drive device 5 is movably coupled to the fire hole cover plate 4 via the connecting screw device 5A.

[0047] Further: The screw device 5A consists of a threaded tube 5A1 and a screw 5A1. The screw is formed by adding threads to the surface of the shaft. The threaded tube 5A1 is fixedly connected to the middle of the fire hole cover plate 4. The screw 5A1 is screwed into the threaded tube 5A1. The driving device 5 drives the shaft to rotate, causing the fire hole cover plate 4 to extend and retract.

[0048] Further: The reverse side of the outer shell 1 is provided with a gas diffusion and diversion cavity 12 with a trumpet-shaped or trapezoidal opening, and the gas diffusion and diversion cavity 12 is centered and corresponds to the gas inlet 11.

[0049] Furthermore, a number of pressure return springs 401 are connected between the flame hole cover plate 4 and the flame distribution plate 22 to help stabilize the flame hole cover plate 4, increase the return spring force, and prevent the flame hole cover plate 4 from vibrating / loosening.

[0050] Furthermore, the outer casing 1 is made of aluminum, and the fire distributor 2 is made of stainless steel.

[0051] Example 1:

[0052] like Figures 1-5 , Figure 10 , Figure 11 , Figures 14-17 , Figures 20-22The image shows a fire control device for a gas combustion heat exchanger. The fire control device includes a shell 1 and a burner 2 for the gas combustion heat exchanger. The shell 1 has a gas inlet 11. The reverse side of the shell 1 has a trapezoidal opening gas diffusion and distribution cavity 12, which is centrally aligned with the gas inlet 11. The burner 2 is bolted to the reverse side of the shell 1. The burner 2 centrally surrounds the gas inlet 11 and aligns it with the gas diffusion and distribution cavity 12. The burner 2 is integrally formed and is rectangular in shape. The burner 2 includes a rectangular frame 21 and a burner plate 22. The periphery of the burner plate 22 is connected to the bottom edge of the rectangular frame 21. A rectangular gas distribution cavity 23 is formed between the rectangular frame 21 and the burner plate 22. The burner plate 22 has a plurality of burner holes 201, which are rectangular or circular in shape. The gas entering through the gas inlet 11 can only be ejected and burned through the burner holes 201.

[0053] A coupling device 3 is provided between the burner 2 and the opposite side of the outer casing 1. The coupling device 3 is a hinge device, which includes a rotating shaft 31 connected to the left and right ends of the bottom edge of the burner hole cover plate 4 and shaft holes 32 provided at the left and right ends of the bottom edge of the burner 2. The rotating shaft 31 at the left and right ends respectively passes through the corresponding shaft holes 32 at the left and right ends, so that the burner hole cover plate 4 is movably arranged between the burner 2 and the opposite side of the outer casing 1. The burner hole cover plate 4 is set in the gas distribution chamber 23. The burner hole cover plate 4 is rectangular in shape, and its length is approximately equal to the length of the gas distribution chamber 23. The bottom edge of the burner hole cover plate 4 is close to and in contact with the bottom edge of the gas distribution chamber 23 and is parallel to it. The burner hole cover plate 4 can cover half of the area of ​​the burner hole 201.

[0054] A DC motor is fixedly installed on the front of the outer casing 1. The shaft end of the DC motor is connected to a movable joint 51, which forms a movable coupling connection with the middle part of the flame hole cover plate 4. The flame size of the flame distributor 2 is adjusted by controlling the extension and retraction of the motor shaft to flip and close the flame hole 201 and fully open the flame hole 201 of the flame hole cover plate 4. (That is, when the DC motor is working, the extension and retraction of the motor shaft drives the extension and retraction of the flame hole cover plate 4 to close the flame hole 201 and fully open the flame hole 201.)

[0055] Under normal conditions, the DC motor retracts through its shaft to pull open the fire hole cover plate 4, thus fully opening the fire hole 201. If the wall-hung boiler water heater is calculated at 100% of its maximum working power (for example, the power of the wall-hung boiler water heater is 40kw), it is suitable for home heating (heating) and domestic hot water use in autumn and winter, and is operating at maximum power. The minimum working power is calculated at 50% of the maximum working power (the minimum power of the wall-hung boiler water heater is 20kw, which is the basic normal combustion power for ignition). Even if it is operating at the minimum power (minimum power 20kw), it is still suitable for home heating (heating) and domestic hot water use in autumn and winter.

[0056] In summer, the control DC motor extends through its shaft to push the fire hole cover plate 4 closed half of the fire hole 201, reducing the working power of the wall-hung boiler water heater by 50%, from the original 40kW to 20kW, and instead using 20kW as the maximum working power (i.e., the maximum ignition and combustion power). At this time, the gas flow can be reduced by readjusting the wall-hung boiler water heater (for example, by reducing it by 25%, the operating power becomes 10kW, which is also the basic normal ignition and combustion power after closing half of the fire hole 201), which is equivalent to adjusting the fuel power in two levels. This not only saves gas but also allows the water temperature to be adjusted to be lower.

[0057] Example 2:

[0058] like Figures 1-2 , Figures 6-9 , Figures 12-15 , Figures 18-19 The image shows a fire control device for a gas combustion heat exchanger. The fire control device includes a shell 1 and a burner 2 for the gas combustion heat exchanger. The shell 1 has a gas inlet 11. The reverse side of the shell 1 has a trapezoidal opening gas diffusion and distribution cavity 12, which is centrally aligned with the gas inlet 11. The burner 2 is fixedly connected to the reverse side of the shell 1. The burner 2 centrally surrounds the gas inlet 11 and aligns it with the gas diffusion and distribution cavity 12. The burner 2 is integrally formed and is rectangular in shape. The burner 2 includes a rectangular frame 21 and a burner plate 22. The periphery of the burner plate 22 is connected to the bottom edge of the rectangular frame 21. A rectangular gas distribution cavity 23 is formed between the rectangular frame 21 and the burner plate 22. The burner plate 22 has a plurality of burner holes 201, which are rectangular or circular in shape. The gas entering through the gas inlet 11 can only be ejected and burned through the burner holes 201.

[0059] A coupling device 3 is provided between the burner 2 and the reverse side of the outer casing 1. The coupling device 3 includes positioning guide posts 3A at the left and right ends of the burner 2 and positioning through holes 3B at the left and right ends of the flame hole cover plate 4. The positioning guide posts 3A pass through the positioning through holes 3B (the positioning cooperation between the positioning guide posts 3A and the positioning through holes 3B makes the flame hole cover plate 4 stable in its extension and retraction). Thus, the flame hole cover plate 4 is movably arranged between the burner 2 and the reverse side of the outer casing 1. The flame hole cover plate 4 is set in the gas distribution chamber 23. The flame hole cover plate 4 is rectangular in shape, and its length is approximately the same as the length of the gas distribution chamber 23. The bottom edge of the flame hole cover plate 4 is close to and in contact with the bottom edge of the gas distribution chamber 23 and is parallel to it. The burner hole cover plate 4 can cover half of the area of ​​the burner hole 201 (for example, the maximum working power of the wall-mounted boiler water heater is 100%, and the minimum working power is 50% of the maximum working power, a difference of 50%; for example, when the burner hole 201 is fully open, the maximum working power is 40kw and the minimum working power is 20kw; when the burner hole cover plate 4 covers half of the burner hole 201, the remaining half of the burner hole 201 is not covered, and the remaining uncovered half of the burner hole 201 becomes the maximum working power of 20kw and the minimum working power of 10kw. After adjusting the burner hole cover plate 4, the power adjustment can be reduced by 50%).

[0060] A DC motor is fixedly installed on the front of the outer casing 1. The shaft end of the DC motor is connected to a movable joint 51, which forms a movable coupling connection with the middle part of the flame hole cover plate 4. The flame size of the flame distributor 2 is adjusted by controlling the extension and retraction of the motor shaft to close the flame hole 201 and fully open the flame hole 201 of the flame hole cover plate 4. (That is, when the motor is working, the extension and retraction of the motor shaft drives the extension and retraction of the flame hole 201 of the flame hole cover plate 4 to close the flame hole 201 and fully open the flame hole 201.)

[0061] Under normal conditions, the DC motor retracts through its shaft to pull open the fire hole cover plate 4, thus fully opening the fire hole 201. If the wall-hung boiler water heater is calculated at 100% of its maximum working power (for example, the power of the wall-hung boiler water heater is 40kw), it is suitable for home heating (heating) and domestic hot water use in autumn and winter, and is operating at maximum power. The minimum working power is calculated at 50% of the maximum working power (the minimum power of the wall-hung boiler water heater is 20kw, which is the basic normal combustion power for ignition). Even if it is operating at the minimum power (minimum power 20kw), it is still suitable for home heating (heating) and domestic hot water use in autumn and winter.

[0062] In summer, the control DC motor extends through its shaft to push the fire hole cover plate 4 closed half of the fire hole 201, reducing the working power of the wall-hung boiler water heater by 50%, from the original 40kW to 20kW, and instead using 20kW as the maximum working power (i.e., the maximum ignition and combustion power). At this time, the gas flow can be reduced by readjusting the wall-hung boiler water heater (for example, by reducing it by 25%, the operating power becomes 10kW, which is also the basic normal ignition and combustion power after closing half of the fire hole 201), which is equivalent to adjusting the fuel power in two levels. This not only saves gas but also allows the water temperature to be adjusted to be lower.

[0063] Example 3:

[0064] like Figures 1-5 , Figure 10 , Figure 11 , Figures 14-17 , Figures 20-23 As shown: A gas combustion heat exchanger includes a heat exchange base shell A and a fire control device. The heat exchange base shell A and the fire control device are sealed together by a sealing ring. A combustion chamber B and a gas heat exchange channel C are provided between them. The bottom of the heat exchange base shell is provided with a flue gas vent D. A hot water pipe is wrapped inside the wall of the heat exchange base shell. One end of the hot water pipe is a water inlet connector E, and the other end is a water outlet connector F.

[0065] Water enters through the inlet connector, flows out through the hot water pipe and then out through the outlet connector. Gas enters through the gas inlet 11 and is ignited in the combustion chamber by the flame distribution port 201 of the burner 2. After heat exchange through the gas heat exchange channel, the water in the hot water pipe wrapped in the heat exchange bottom shell is heated. The flue gas after combustion is discharged from the exhaust port.

[0066] The fire control device includes a gas combustion heat exchanger housing 1 and a flame distributor 2. The housing 1 is provided with a gas inlet 11. The reverse side of the housing 1 is provided with a trapezoidal opening gas diffusion and diversion cavity 12, which is centrally aligned with the gas inlet 11. The flame distributor 2 is fixedly connected to the reverse side of the housing 1 by bolts. The flame distributor 2 centrally surrounds the gas inlet 11 and aligns it with the gas diffusion and diversion cavity 12. The flame distributor 2 is integrally formed and is rectangular in shape. The flame distributor 2 includes a rectangular frame 21 and a flame distribution plate 22. The periphery of the flame distribution plate 22 is connected to the bottom edge of the rectangular frame 21. A rectangular gas distribution cavity 23 is formed between the rectangular frame 21 and the flame distribution plate 22. The flame distribution plate 22 is provided with a plurality of flame distribution holes 201, which are rectangular or circular in shape. The gas entering through the gas inlet 11 can only be ejected and burned through the flame distribution holes 201.

[0067] A coupling device 3 is provided between the burner 2 and the opposite side of the outer casing 1. The coupling device 3 is a hinge device, which includes a rotating shaft 31 connected to the left and right ends of the bottom edge of the burner hole cover plate 4 and shaft holes 32 provided at the left and right ends of the bottom edge of the burner 2. The rotating shaft 31 at the left and right ends respectively passes through the corresponding shaft holes 32 at the left and right ends, so that the burner hole cover plate 4 is movably arranged between the burner 2 and the opposite side of the outer casing 1. The burner hole cover plate 4 is set in the gas distribution chamber 23. The burner hole cover plate 4 is rectangular in shape, and its length is approximately equal to the length of the gas distribution chamber 23. The bottom edge of the burner hole cover plate 4 is close to and in contact with the bottom edge of the gas distribution chamber 23 and is parallel to it. The burner hole cover plate 4 can cover half of the area of ​​the burner hole 201.

[0068] A DC motor is fixedly installed on the front of the outer casing 1. The shaft end of the DC motor is connected to a movable joint 51, which forms a movable coupling connection with the middle part of the flame hole cover plate 4. The flame size of the flame distributor 2 is adjusted by controlling the extension and retraction of the motor shaft to flip and close the flame hole 201 and fully open the flame hole 201 of the flame hole cover plate 4. (That is, when the DC motor is working, the extension and retraction of the motor shaft drives the extension and retraction of the flame hole cover plate 4 to close the flame hole 201 and fully open the flame hole 201.)

[0069] Under normal conditions, the DC motor retracts through its shaft to pull open the fire hole cover plate 4, thus fully opening the fire hole 201. If the wall-hung boiler water heater is calculated at 100% of its maximum working power (for example, the power of the wall-hung boiler water heater is 40kw), it is suitable for home heating (heating) and domestic hot water use in autumn and winter, and is operating at maximum power. The minimum working power is calculated at 50% of the maximum working power (the minimum power of the wall-hung boiler water heater is 20kw, which is the basic normal combustion power for ignition). Even if it is operating at the minimum power (minimum power 20kw), it is still suitable for home heating (heating) and domestic hot water use in autumn and winter.

[0070] In summer, the control DC motor extends through its shaft to push the fire hole cover plate 4 closed half of the fire hole 201, reducing the working power of the wall-hung boiler water heater by 50%, from the original 40kW to 20kW, and instead using 20kW as the maximum working power (i.e., the maximum ignition and combustion power). At this time, the gas flow can be reduced by readjusting the wall-hung boiler water heater (for example, by reducing it by 25%, the operating power becomes 10kW, which is also the basic normal ignition and combustion power after closing half of the fire hole 201), which is equivalent to adjusting the fuel power in two levels. This not only saves gas but also allows the water temperature to be adjusted to be lower.

[0071] Example 4:

[0072] like Figures 1-2 , Figures 6-9 , Figures 12-15 , Figures 18-19 , Figure 24 As shown: A gas combustion heat exchanger includes a heat exchange base shell A and a fire control device. The heat exchange base shell A and the fire control device are sealed together by a sealing ring. A combustion chamber B and a gas heat exchange channel C are provided between them. The bottom of the heat exchange base shell is provided with a flue gas vent D. A hot water pipe is wrapped inside the wall of the heat exchange base shell. One end of the hot water pipe is a water inlet connector E, and the other end is a water outlet connector F.

[0073] Water enters through the inlet connector, flows out through the hot water pipe and then out through the outlet connector. Gas enters through the gas inlet 11 and is ignited in the combustion chamber by the flame distribution port 201 of the burner 2. After heat exchange through the gas heat exchange channel, the water in the hot water pipe wrapped in the heat exchange bottom shell is heated. The flue gas after combustion is discharged from the exhaust port.

[0074] The fire control device includes a gas combustion heat exchanger housing 1 and a flame distributor 2. The housing 1 is provided with a gas inlet 11. The reverse side of the housing 1 is provided with a trapezoidal opening gas diffusion and diversion cavity 12, which is centrally aligned with the gas inlet 11. The flame distributor 2 is fixedly connected to the reverse side of the housing 1. The flame distributor 2 centrally surrounds the gas inlet 11 and aligns it with the gas diffusion and diversion cavity 12. The flame distributor 2 is integrally formed and is rectangular in shape. The flame distributor 2 includes a rectangular frame 21 and a flame distribution plate 22. The periphery of the flame distribution plate 22 is connected to the bottom edge of the rectangular frame 21. A rectangular gas distribution cavity 23 is formed between the rectangular frame 21 and the flame distribution plate 22. The flame distribution plate 22 is provided with a plurality of flame distribution holes 201, which are rectangular or circular in shape. The gas entering through the gas inlet 11 can only be ejected and burned through the flame distribution holes 201.

[0075] A coupling device 3 is provided between the burner 2 and the reverse side of the outer casing 1. The coupling device 3 includes positioning guide posts 3A at the left and right ends of the burner 2 and positioning through holes 3B at the left and right ends of the flame hole cover plate 4. The positioning guide posts 3A pass through the positioning through holes 3B (the positioning cooperation between the positioning guide posts 3A and the positioning through holes 3B makes the flame hole cover plate 4 stable in its extension and retraction). Thus, the flame hole cover plate 4 is movably arranged between the burner 2 and the reverse side of the outer casing 1. The flame hole cover plate 4 is set in the gas distribution chamber 23. The flame hole cover plate 4 is rectangular in shape, and its length is approximately the same as the length of the gas distribution chamber 23. The bottom edge of the flame hole cover plate 4 is close to and in contact with the bottom edge of the gas distribution chamber 23 and is parallel to it. The burner hole cover plate 4 can cover half of the area of ​​the burner hole 201 (for example, the maximum working power of the wall-mounted boiler water heater is 100%, and the minimum working power is 50% of the maximum working power, a difference of 50%; for example, when the burner hole 201 is fully open, the maximum working power is 40kw and the minimum working power is 20kw; when the burner hole cover plate 4 covers half of the burner hole 201, the remaining half of the burner hole 201 is not covered, and the remaining uncovered half of the burner hole 201 becomes the maximum working power of 20kw and the minimum working power of 10kw. After adjusting the burner hole cover plate 4, the power adjustment can be reduced by 50%).

[0076] A DC motor is fixedly installed on the front of the outer casing 1. The shaft end of the DC motor is connected to a movable joint 51, which forms a movable coupling connection with the middle part of the flame hole cover plate 4. The flame size of the flame distributor 2 is adjusted by controlling the extension and retraction of the motor shaft to close the flame hole 201 and fully open the flame hole 201 of the flame hole cover plate 4. (That is, when the motor is working, the extension and retraction of the motor shaft drives the extension and retraction of the flame hole 201 of the flame hole cover plate 4 to close the flame hole 201 and fully open the flame hole 201.)

[0077] Under normal conditions, the DC motor retracts through its shaft to pull open the fire hole cover plate 4, thus fully opening the fire hole 201. If the wall-hung boiler water heater is calculated at 100% of its maximum working power (for example, the power of the wall-hung boiler water heater is 40kw), it is suitable for home heating (heating) and domestic hot water use in autumn and winter, and is operating at maximum power. The minimum working power is calculated at 50% of the maximum working power (the minimum power of the wall-hung boiler water heater is 20kw, which is the basic normal combustion power for ignition). Even if it is operating at the minimum power (minimum power 20kw), it is still suitable for home heating (heating) and domestic hot water use in autumn and winter.

[0078] In summer, the control DC motor extends through its shaft to push the fire hole cover plate 4 closed half of the fire hole 201, reducing the working power of the wall-hung boiler water heater by 50%, from the original 40kW to 20kW, and instead using 20kW as the maximum working power (i.e., the maximum ignition and combustion power). At this time, the gas flow can be reduced by readjusting the wall-hung boiler water heater (for example, by reducing it by 25%, the operating power becomes 10kW, which is also the basic normal ignition and combustion power after closing half of the fire hole 201), which is equivalent to adjusting the fuel power in two levels. This not only saves gas but also allows the water temperature to be adjusted to be lower.

Claims

1. A fire control device for a gas combustion heat exchanger, comprising a shell of the gas combustion heat exchanger and a distributor, wherein the shell is provided with a gas inlet, and the distributor is fixedly connected to the reverse side of the shell, the distributor being provided with a plurality of distributor holes, the distributor surrounding the gas inlet, characterized in that: The flame distributor is movably connected to the back of the housing via a coupling device, and the flame hole cover plate can cover one-third to two-thirds of the flame hole area. The front of the housing is sealed and fixedly installed with a drive device. The shaft of the drive device passes through the housing and is movably coupled to the flame hole cover plate. The flame power of the flame distributor is adjusted by controlling the extension and retraction of the shaft of the drive device to close the flame hole and fully open the flame hole. The coupling device includes positioning guide posts set at the left and right ends of the fire distributor or at the left and right ends of the reverse side of the outer shell, and positioning through holes set at the left and right ends of the fire hole cover plate. The positioning guide posts are connected to the positioning through holes, so that the fire distributor and the reverse side of the outer shell are movably connected by the fire hole cover plate.

2. The firepower regulating device for a gas combustion heat exchanger according to claim 1, characterized in that: The driving device is a power device; the power device is an electric device; the electric device is a DC motor; the DC motor is a stepper motor.

3. The firepower regulating device for a gas combustion heat exchanger according to claim 1, characterized in that: The flame distributor is rectangular in shape. It includes a rectangular frame and a flame distribution plate. The periphery of the flame distribution plate is connected to the bottom edge of the rectangular frame. A rectangular gas distribution cavity is formed between the rectangular frame and the flame distribution plate. A flame hole cover plate is installed inside the gas distribution cavity. The flame hole cover plate is rectangular in shape, and its length is approximately equal to the length of the gas distribution cavity. The bottom edge of the flame hole cover plate is close to and parallel to the bottom edge of the gas distribution cavity. The flame distribution plate is provided with several flame holes.

4. The firepower regulating device for a gas combustion heat exchanger according to claim 1, characterized in that: The reverse side of the outer casing is provided with a gas diffusion and diversion cavity with a funnel-shaped or trapezoidal opening, and the gas diffusion and diversion cavity is centered and corresponds to the gas inlet.

5. The firepower regulating device for a gas combustion heat exchanger according to claim 3, characterized in that: Several pressure return springs are connected between the fire hole cover plate and the fire distribution plate.

6. The firepower regulating device for a gas combustion heat exchanger according to claim 1, characterized in that: The shaft end of the drive device is movably coupled to the fire hole cover plate via a connecting joint.

7. The firepower regulating device for a gas combustion heat exchanger according to claim 1, characterized in that: The shaft of the drive device is movably coupled to the fire hole cover plate via a connecting screw device.

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