Gas water heater

Abstract

The utility model relates to the technical field of gas water heaters, and discloses a gas water heater which comprises a whole machine shell, a gas inlet pipe and a gas outlet pipe. The main board is used for supplying power to the electric components; the power supply is used for supplying power to the mainboard; the smoke exhaust pipe comprises an inner-layer smoke pipe and an outer-layer smoke pipe, the inner-layer smoke pipe comprises a thermoelectric power generation sheet, the thermoelectric power generation sheet is connected with a power supply, the inner side of the inner-layer smoke pipe forms a smoke exhaust channel, the smoke exhaust channel is communicated with the whole machine shell, the outer-layer smoke pipe surrounds the inner-layer smoke pipe, an airflow channel is formed between the outer-layer smoke pipe and the inner-layer smoke pipe, and the outer-layer smoke pipe is provided with an air inlet hole; the gas water heater does not need to be externally connected with a mains supply, during power failure, electricity stored by the power source can be supplied to the main board, the main board supplies electricity to all electric components, the gas water heater can be normally ignited for use, and in the normal use process of the gas water heater, the gas water heater is not prone to being damaged. And the power generated by the thermoelectric power generation sheet continuously charges the power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, in particular to a gas water heater. Background Art

[0002] Gas water heaters, a staple of hot water production, have become ubiquitous in countless households. They heat water using gas. While gas is the primary energy source, conventional technologies still rely on a mains connection to power components such as the mainboard, proportional valve, gas distributor, and fan. This can cause the water heater to become inoperable during power outages. While it can still produce water, it cannot heat the water. Utility Model Content

[0003] In view of this, the utility model provides a gas water heater to solve the problem in the related art that the gas water heater cannot be used normally after a power outage.

[0004] The utility model provides a gas water heater, comprising:

[0005] Complete machine housing;

[0006] Mainboard, used to supply power to electrical components;

[0007] A power supply, used to supply power to the mainboard;

[0008] The smoke exhaust pipe includes an inner smoke pipe and an outer smoke pipe. The inner smoke pipe includes a thermoelectric power generation sheet, which is connected to the power supply. The inner side of the inner smoke pipe constitutes a smoke exhaust channel, which is connected to the entire machine housing. The outer smoke pipe surrounds the inner smoke pipe, and an air flow channel is formed between the outer smoke pipe and the inner smoke pipe. The outer smoke pipe is provided with an air inlet hole, which is connected to the air flow channel.

[0009] Beneficial effects: The exhaust channel is connected to the entire housing, and the high-temperature flue gas generated by the burner combustion is discharged outward through the exhaust channel in the inner smoke pipe. Since the high-temperature flue gas flows through the inner side of the inner smoke pipe, the temperature of the inner smoke pipe is relatively high. By arranging an outer smoke pipe on the outside of the inner smoke pipe, the outer smoke pipe is provided with an air inlet, and an air flow channel is formed between the outer smoke pipe and the inner smoke pipe, external cold air can enter the air flow channel through the air inlet and flow along the air flow channel, so that the temperature outside the inner smoke pipe is relatively low. The inner smoke pipe includes a thermoelectric generator. The temperature difference between the inside and outside of the thermoelectric generator is large, thereby realizing thermoelectric power generation. The electricity generated by the thermoelectric generator can charge the power supply, which supplies power to the main board, and the main board supplies power to various electrical components. Therefore, the gas water heater does not need to be connected to the mains electricity. In the event of a power outage, the electricity stored in the power supply can be used to supply power to the main board, which supplies power to various electrical components. The gas water heater can be ignited and used normally, and during normal use of the gas water heater, the electricity generated by the thermoelectric generator continuously charges the power supply.

[0010] In an optional embodiment, the thermoelectric power generation sheet is cylindrical.

[0011] Beneficial effect: Since the thermoelectric power generation sheet is cylindrical and constitutes part of the inner smoke pipe, the high-temperature flue gas generated by the burner flows through the inner side of the thermoelectric power generation sheet. The high-temperature flue gas generated by the burner can fully contact the inner side of the thermoelectric power generation sheet, and the contact area is large, which can improve the power generation efficiency.

[0012] In an optional embodiment, the inner smoke pipe further includes a first cylindrical portion and a second cylindrical portion connected to both ends of the thermoelectric power generation sheet, the first cylindrical portion is connected to the entire machine housing, and the second cylindrical portion is provided with a smoke exhaust hole.

[0013] Beneficial effect: By connecting the first cylindrical part and the second cylindrical part at both ends of the thermoelectric power generation sheet, it is convenient to connect with the entire machine housing and also convenient to process the smoke exhaust hole in the second cylindrical part.

[0014] In an optional embodiment, the outer smoke pipe is connected to the first cylindrical portion and / or the second cylindrical portion via a bracket.

[0015] Beneficial effects: the outer smoke pipe is connected to the first cylindrical portion and / or the second cylindrical portion via a bracket, and the bracket can support the outer smoke pipe and maintain the shape of the outer smoke pipe.

[0016] In an optional embodiment, a guide plate is provided in the air flow channel, and the guide plate is used to guide the air flow entering from the air inlet to the thermoelectric power generation plate.

[0017] Beneficial effect: By arranging a guide plate in the air flow channel, the guide plate can guide the airflow entering from the air inlet to the thermoelectric power generation plate, thereby lowering the temperature outside the thermoelectric power generation plate and improving the power generation efficiency.

[0018] In an optional embodiment, the guide vane is arranged at an angle.

[0019] Beneficial effect: By setting the guide plate at an angle, on the one hand, the airflow entering from the air inlet can be directed to the thermoelectric power generation plate, and on the other hand, the airflow can be guided to flow along the airflow channel to ensure the flow direction of the airflow.

[0020] In an optional embodiment, a plurality of guide plates are provided at intervals along the length direction of the outer smoke tube, the distance between two adjacent guide plates is L1, the length of the outer smoke tube is L, and L1≥L / 11.

[0021] Beneficial effect: If the distance between two adjacent guide plates is too short, the turbulence failure will be caused. Therefore, by making the distance between two adjacent guide plates greater than or equal to 1 / 11 of the length of the outer smoke tube, the turbulence failure can be avoided.

[0022] In an optional embodiment, the height of the guide plate is H, the gap between the outer layer smoke tube and the inner layer smoke tube is D, and H≤D / 3.

[0023] Beneficial effect: If the height of the guide plate is too high, the cross-sectional area for air to pass through will be too small, resulting in insufficient air supply. Therefore, by making the height of the guide plate less than or equal to 1 / 3 of the gap between the outer smoke tube and the inner smoke tube, it can play a guiding role while allowing air to pass smoothly.

[0024] In an optional embodiment, the first end of the outer smoke tube is sealed and connected to the inner smoke tube, the second end of the outer smoke tube is provided with an opening, and the air flow channel is connected to the entire machine housing through the opening.

[0025] Beneficial effect: Since the first end of the outer smoke tube is sealed and connected to the inner smoke tube, when external cold air enters the air flow channel from the air inlet hole, it can only flow toward the second end of the outer smoke tube, enter the entire machine casing through the opening at the second end of the outer smoke tube, and then enter the inner smoke tube together with the high-temperature flue gas.

[0026] In an optional embodiment, the thermoelectric power generation sheet is made of non-metallic material.

[0027] Beneficial effect: Since the thermoelectric power generation sheet is made of non-metallic material, the heat transfer from the inside to the outside of the thermoelectric power generation sheet can be reduced, thereby ensuring the power generation efficiency.

[0028] In an optional embodiment, a transformer, a voltage stabilizer, a rectifier, and a capacitor are connected in series between the thermoelectric power generation sheet and the power supply.

[0029] Beneficial effect: By connecting a transformer, a voltage stabilizer, a rectifier and a capacitor in series between the thermoelectric generator and the power supply, stable charging of the power supply can be ensured.

[0030] In an optional embodiment, the mainboard is provided with a power interface, and the power interface is suitable for connecting to an emergency power supply device.

[0031] Beneficial effect: By setting a power interface on the mainboard, it is convenient to provide emergency power supply to users in the event of a power outage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a schematic structural diagram of a smoke exhaust pipe of a gas water heater according to an embodiment of the present utility model;

[0034] Figure 2 for Figure 1 A cross-sectional view of the exhaust pipe shown;

[0035] Figure 3 for Figure 1 A side view of the exhaust pipe shown in ;

[0036] Figure 4 for Figure 1 Schematic diagram of the middle and inner smoke pipes;

[0037] Figure 5 for Figure 1 Schematic diagram of the middle and outer smoke pipes;

[0038] Figure 6 for Figure 2 Schematic diagram of the middle bracket;

[0039] Figure 7 This is a schematic diagram of a gas water heater according to an embodiment of the present utility model;

[0040] Figure 8 This is a flow chart of a control method for a gas water heater according to an embodiment of the present utility model.

[0041] Description of reference numerals:

[0042] 1. Main board; 2. Power supply; 3. Inner smoke pipe; 301. Thermoelectric generator; 302. First cylindrical portion; 303. Second cylindrical portion; 304. Smoke exhaust hole; 4. Outer smoke pipe; 401. Air inlet hole; 5. Smoke exhaust channel; 6. Air flow channel; 7. Bracket; 8. Guide vane; 9. Burner; 10. Gas proportional valve; 11. Fan. DETAILED DESCRIPTION

[0043] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0044] Gas water heaters, a staple of hot water production, have become ubiquitous in countless households. They heat water using gas. While gas is the primary energy source, conventional technologies still rely on a mains connection to power components such as the mainboard, proportional valve, gas distributor, and fan. This can cause the water heater to become inoperable during power outages. While it can still produce water, it cannot heat the water.

[0045] The following combination Figures 1 to 8 , describing the embodiments of the present utility model.

[0046] According to an embodiment of the present invention, on the one hand, a gas water heater is provided, comprising a whole casing, a mainboard 1, a power supply 2 and a smoke exhaust pipe.

[0047] Among them, the main board 1 is used to power electrical components; the power supply 2 is used to power the main board 1; the smoke exhaust pipe includes an inner smoke pipe 3 and an outer smoke pipe 4, the inner smoke pipe 3 includes a thermoelectric power generation sheet 301, the thermoelectric power generation sheet 301 is connected to the power supply 2, the inner side of the inner smoke pipe 3 constitutes a smoke exhaust channel 5, the smoke exhaust channel 5 is connected to the entire machine casing, the outer smoke pipe 4 surrounds the inner smoke pipe 3, and an air flow channel 6 is formed between the outer smoke pipe 4 and the inner smoke pipe 3, the outer smoke pipe is provided with an air inlet hole 401, and the air inlet hole 401 is connected to the air flow channel 6.

[0048] In this embodiment, the smoke exhaust channel 5 is connected to the entire machine casing, and the high-temperature flue gas generated by the burner 9 is discharged outward through the smoke exhaust channel 5 in the inner smoke tube 3. Since the high-temperature flue gas flows through the inner side of the inner smoke tube 3, the temperature of the inner smoke tube 3 is relatively high. By arranging an outer smoke tube 4 on the outer side of the inner smoke tube 3, the outer smoke tube 4 is provided with an air inlet 401, and an air flow channel 6 is formed between the outer smoke tube 4 and the inner smoke tube 3, external cold air can enter the air flow channel 6 from the air inlet 401 and flow along the air flow channel 6, so the outside temperature of the inner smoke tube 3 is relatively low. The inner smoke tube 3 includes a thermoelectric power generation sheet 301. The temperature difference between the inside and outside of the thermoelectric power generation sheet 301 is large, thereby realizing thermoelectric power generation. The electricity generated by the thermoelectric power generation sheet 301 can charge the power supply 2, the power supply 2 supplies power to the main board 1, and the main board 1 supplies power to various electrical components. Therefore, the gas water heater does not need to be connected to the mains electricity. When there is a power outage, the electricity stored in the power supply 2 can supply power to the mainboard 1, and the mainboard 1 supplies power to each electrical component. The gas water heater can be ignited and used normally. In addition, during the normal use of the gas water heater, the electricity generated by the thermoelectric power generation chip 301 continuously charges the power supply 2.

[0049] It should be noted that after the gas water heater is produced, the power supply 2 contains a certain amount of electricity, which can be used by the user to start the gas water heater. When the user turns on the hot water, the burner 9 burns, and the high-temperature flue gas generated by the combustion flows through the inside of the thermoelectric power generation sheet 301. The thermoelectric power generation sheet 301 generates electricity to charge the power supply 2.

[0050] It should be noted that since the current generated by the thermoelectric power generation sheet 301 is greatly affected by the size of the fire power, the current it generates cannot be stably used to power the mainboard 1. Therefore, the power supply 2 supplies power to the mainboard 1, and the mainboard 1 supplies power to various electrical components. The current generated by the thermoelectric power generation sheet 301 is transmitted to the power supply 2 in real time for charging.

[0051] In one embodiment, the thermoelectric power generation sheet 301 is cylindrical.

[0052] In this embodiment, since the thermoelectric power generation sheet 301 is cylindrical, the thermoelectric power generation sheet 301 constitutes a part of the inner smoke pipe 3, and the high-temperature flue gas generated by the combustion of the burner 9 flows through the inner side of the thermoelectric power generation sheet 301. The high-temperature flue gas generated by the combustion of the burner 9 can fully contact the inner side of the thermoelectric power generation sheet 301, and the contact area is large, which can improve the power generation efficiency.

[0053] In an embodiment not shown in the figure, the thermoelectric power generation sheet 301 may be an arc-shaped sheet structure.

[0054] In one embodiment, the inner smoke pipe 3 further includes a first cylindrical portion 302 and a second cylindrical portion 303 connected to both ends of the thermoelectric power generation sheet 301 . The first cylindrical portion 302 is connected to the entire machine housing, and the second cylindrical portion 303 is provided with a smoke exhaust hole 304 .

[0055] In this embodiment, by connecting the first cylindrical portion 302 and the second cylindrical portion 303 at both ends of the thermoelectric power generation sheet 301 , it is convenient to connect with the entire machine housing and also convenient to process the smoke exhaust hole 304 in the second cylindrical portion 303 .

[0056] Specifically in one embodiment, the first cylindrical portion 302 and the second cylindrical portion 303 are both made of stainless steel, which facilitates processing of the smoke exhaust hole 304 on the second cylindrical portion 303 .

[0057] Specifically in one embodiment, Figure 4 As shown, the smoke exhaust hole 304 is provided on the peripheral wall of the second cylindrical portion 303 .

[0058] In one embodiment, the outer smoke tube 4 is connected to the first cylindrical portion 302 and / or the second cylindrical portion 303 via a bracket 7 .

[0059] In this embodiment, the outer smoke tube 4 is connected to the first cylindrical portion 302 and / or the second cylindrical portion 303 via a bracket 7 . The bracket 7 can support the outer smoke tube 4 and maintain the shape of the outer smoke tube 4 .

[0060] Specifically in one embodiment, the outer smoke pipe 4 is connected to the first cylindrical portion 302 via a bracket 7 , and the outer smoke pipe 4 is connected to the second cylindrical portion 303 via a bracket 7 .

[0061] It should be noted that the bracket 7 is made of sheet metal and has a hollow structure, which can support the outer smoke pipe 4 and the inner smoke pipe 3 and has a ventilation effect.

[0062] In one embodiment, a guide plate 8 is provided in the air flow channel 6 , and the guide plate 8 is used to guide the air flow entering from the air inlet 401 to the thermoelectric power generation plate 301 .

[0063] In this embodiment, by providing a guide plate 8 in the air flow channel 6, the guide plate 8 can guide the airflow entering from the air inlet 401 to the thermoelectric power generation plate 301, thereby lowering the temperature outside the thermoelectric power generation plate 301 and improving the power generation efficiency.

[0064] In one embodiment, the guide vanes 8 are arranged at an angle.

[0065] In this embodiment, by tilting the guide plate 8, the airflow entering from the air inlet 401 can be directed to the thermoelectric power generation plate 301 on the one hand, and the airflow can be guided to flow along the airflow channel 6 on the other hand to ensure the flow direction of the airflow.

[0066] In one embodiment, a plurality of guide plates 8 are provided at intervals along the length direction of the outer smoke tube 4 , the interval between two adjacent guide plates 8 is L1 , the length of the outer smoke tube 4 is L, and L1 ≥ L / 11.

[0067] In this embodiment, if the distance between two adjacent guide vanes 8 is too short, the turbulence failure will be caused. Therefore, by making the distance between two adjacent guide vanes 8 greater than or equal to 1 / 11 of the length of the outer smoke tube 4, the turbulence failure can be avoided.

[0068] Specifically in one embodiment, the distance between two adjacent guide plates 8 is equal to 1 / 11 of the length of the outer smoke tube 4 .

[0069] Specifically in one embodiment, the distance between two adjacent guide plates 8 is greater than 1 / 11 of the length of the outer smoke tube 4 . For example, the distance between two adjacent guide plates 8 is equal to 1 / 10 of the length of the outer smoke tube 4 .

[0070] In one embodiment, the height of the guide plate 8 is H, the gap between the outer smoke tube 4 and the inner smoke tube 3 is D, and H≤D / 3.

[0071] In this embodiment, if the height of the guide plate 8 is too high, the cross-sectional area for air to pass through will be too small, resulting in insufficient air supply. Therefore, by making the height of the guide plate 8 less than or equal to 1 / 3 of the gap between the outer smoke tube 4 and the inner smoke tube 3, it can play a guiding role while allowing air to pass smoothly.

[0072] Specifically in one embodiment, the height of the guide plate 8 is exactly equal to 1 / 3 of the gap between the outer smoke tube 4 and the inner smoke tube 3 .

[0073] Specifically in one embodiment, the height of the guide plate 8 is less than 1 / 3 of the gap between the outer layer smoke tube 4 and the inner layer smoke tube 3 , for example, 1 / 4 of the gap between the outer layer smoke tube 4 and the inner layer smoke tube 3 .

[0074] It should be noted that the height of the guide plate 8 refers to the dimension along the radial direction of the outer smoke tube 4 .

[0075] In one embodiment, the first end of the outer smoke tube 4 is sealed and connected to the inner smoke tube 3 , and the second end of the outer smoke tube 4 is provided with an opening, and the air flow channel 6 is connected to the entire machine housing through the opening.

[0076] In this embodiment, since the first end of the outer smoke tube 4 is sealed and connected to the inner smoke tube 3, when the external cold air enters the air flow channel 6 from the air inlet 401, it can only flow toward the second end of the outer smoke tube 4, enter the entire machine casing through the opening at the second end of the outer smoke tube 4, and then enter the inner smoke tube 3 together with the high-temperature flue gas.

[0077] It should be noted that the gas water heater of this embodiment has a fan 11 in the whole machine shell. The fan 11 provides power to draw out the flue gas and discharge it through the inner flue pipe 3, so that negative pressure is generated in the whole machine, so that external cold air can enter through the air inlet 401, flow to the inside of the whole machine shell through the air flow channel 6, participate in combustion, generate flue gas, and be discharged to the outside through the inner flue pipe 3.

[0078] In one embodiment, the thermoelectric power generation sheet 301 is made of non-metallic material.

[0079] In this embodiment, since the thermoelectric power generation sheet 301 is made of a non-metallic material, heat transfer from the inside to the outside of the thermoelectric power generation sheet 301 can be reduced, thereby ensuring power generation efficiency.

[0080] Specifically in one embodiment, the thermoelectric power generation sheet 301 can be made of non-metallic materials such as plastic or rubber.

[0081] In one embodiment, a transformer, a voltage stabilizer, a rectifier, and a capacitor are connected in series between the thermoelectric power generation sheet 301 and the power source 2 .

[0082] In this embodiment, by connecting a transformer, a voltage stabilizer, a rectifier, and a capacitor in series between the thermoelectric power generation sheet 301 and the power source 2 , it is possible to ensure stable charging of the power source 2 .

[0083] In one embodiment, the mainboard 1 is provided with a power interface, which is suitable for connecting to an emergency power supply device.

[0084] In this embodiment, a power interface is provided on the mainboard 1 to facilitate emergency power supply to the user during a power outage.

[0085] According to an embodiment of the present invention, on the other hand, a control method for a gas water heater is provided, which is applied to the gas water heater provided in the above embodiment, such as Figure 8 As shown, the control method includes:

[0086] Get the power of power supply 2;

[0087] If the power level is lower than the first preset power level, the gas water heater is controlled to ignite.

[0088] In this embodiment, if the power level of the power source 2 is lower than the first preset power level, the gas water heater is controlled to ignite, and the high-temperature flue gas generated by the burner 9 is discharged outward through the exhaust channel 5 in the inner smoke tube 3. Since the high-temperature flue gas flows through the inner side of the inner smoke tube 3, the temperature of the inner smoke tube 3 is relatively high. By arranging an outer smoke tube 4 on the outer side of the inner smoke tube 3, the outer smoke tube 4 is provided with an air inlet 401, and an air flow channel 6 is formed between the outer smoke tube 4 and the inner smoke tube 3, external cold air can enter the air flow channel 6 from the air inlet 401 and flow along the air flow channel 6, so the temperature of the outer side of the inner smoke tube 3 is relatively low. The inner smoke tube 3 includes a thermoelectric power generation sheet 301, and the temperature difference between the inside and outside of the thermoelectric power generation sheet 301 is large, thereby realizing thermoelectric power generation. The power generated by the thermoelectric power generation sheet 301 can charge the power source 2 to prevent the power level of the power source 2 from being too low and causing the gas water heater to fail to work normally.

[0089] Specifically in one embodiment, the first preset power level is 20% power level.

[0090] Specifically in one embodiment, the electrical components of the gas water heater include a gas proportional valve 10 and an ignition needle. Controlling the ignition of the gas water heater specifically includes controlling the gas proportional valve 10 to open and supplying power to the ignition needle.

[0091] In one embodiment, if the power level is lower than a first preset power level, the control method further includes:

[0092] The burner 9 is controlled to burn at minimum firepower until the power reaches a second preset power.

[0093] In this embodiment, if the power is lower than the first preset power, the burner 9 is controlled to burn at the minimum firepower until the power reaches the second preset power, which can save more energy.

[0094] Specifically in one embodiment, the second preset power level may be 80%.

[0095] In one embodiment, if the power level is lower than a first preset power level, the control method further includes:

[0096] The fan 11 is controlled to operate at the lowest power.

[0097] In this embodiment, if the power is lower than the first preset power, the fan 11 operates at the lowest power to ensure that the burner 9 can burn normally, which can reduce the power consumption of the power supply 2 by the fan 11 and save more electricity.

[0098] In one embodiment, the control method further includes:

[0099] If the power level is lower than the first preset power level and the gas water heater fails to ignite successfully, the control motherboard 1 stops supplying power to electrical components except the gas proportional valve 10 and the ignition needle, and controls the ignition of the gas water heater at preset time intervals until the power level is lower than the third preset power level or the gas water heater ignites successfully.

[0100] In this embodiment, if the battery level falls below a first preset level, a gas outage may occur, preventing the gas water heater from igniting successfully. In this case, the control board 1 stops supplying power to all electrical components except the gas proportional valve 10 and the ignition pin, reducing power consumption by the power supply 2. The control board 1 then controls the gas water heater to ignite at preset intervals to ensure timely charging of the power supply 2. If ignition still fails even after the battery level falls below a third preset level, ignition is discontinued to prevent excessive power consumption and shortening the life of the power supply 2.

[0101] Specifically in one embodiment, the third preset power level is 5% power level.

[0102] In one embodiment, the control method further includes:

[0103] If the power level is lower than the third preset power level and the gas water heater fails to ignite successfully, the control mainboard 1 stops supplying power to all electrical components.

[0104] In this embodiment, if the power level is lower than the third preset power level and the ignition fails, the control mainboard 1 stops supplying power to all electrical components to prevent the power supply 2 from being over-consumed and affecting its lifespan.

[0105] The gas water heater provided in this embodiment will automatically pneumatically ignite the entire machine when the remaining power of power source 2 is less than 20% (regardless of whether the user is using hot water), and the power of fan 11 will be reduced to the minimum power to maintain combustion. It will continue to burn at the minimum firepower to generate high-temperature flue gas and bring in low-temperature air to generate electricity until the power of power source 2 is restored to 80%.

[0106] When there is a gas outage at a user's home, the system cannot ignite even if the battery level is below 20%. Prolonged gas outages or idle power can cause the battery level to fall below 5%. If the system cannot ignite when the battery level falls below 20%, the mainboard 1 enters energy-saving mode, shutting off all output power interfaces except for the ignition interface. Power is cut off to all electrical components except the gas proportional valve 10 and the ignition pin, and the system ignites once every 24 hours until the battery level falls below 5% or the system ignites. If the system still fails to ignite and generate electricity even after the battery level falls below 5%, the system shuts off all output power interfaces and enters sleep mode, waiting for the user to automatically start the system and ignite the hot water when needed.

[0107] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by this application.

Claims

1. A gas water heater, characterized in that: include: Complete machine housing; A mainboard (1) for supplying power to electrical components; A power supply (2) for supplying power to the mainboard (1); A smoke exhaust pipe comprises an inner smoke pipe (3) and an outer smoke pipe (4), wherein the inner smoke pipe (3) comprises a thermoelectric power generation sheet (301), wherein the thermoelectric power generation sheet (301) is connected to the power source (2), wherein the inner side of the inner smoke pipe (3) forms a smoke exhaust channel (5), wherein the smoke exhaust channel (5) is communicated with the entire machine housing, wherein the outer smoke pipe (4) surrounds the outer side of the inner smoke pipe (3), wherein an air flow channel (6) is formed between the outer smoke pipe (4) and the inner smoke pipe (3), wherein the outer smoke pipe (4) is provided with an air inlet hole (401), wherein the air inlet hole (401) is communicated with the air flow channel (6).

2. The gas water heater according to claim 1, characterized in that: The thermoelectric power generation sheet (301) is cylindrical.

3. The gas water heater according to claim 2, characterized in that: The inner smoke pipe (3) further comprises a first cylindrical portion (302) and a second cylindrical portion (303) connected to both ends of the thermoelectric power generation sheet (301); the first cylindrical portion (302) is connected to the entire machine housing; and the second cylindrical portion (303) is provided with a smoke exhaust hole (304).

4. The gas water heater according to claim 3, characterized in that: The outer smoke tube (4) is connected to the first cylindrical portion (302) and / or the second cylindrical portion (303) via a bracket (7).

5. The gas water heater according to any one of claims 1 to 4, characterized in that: A guide plate (8) is provided in the air flow channel (6), and the guide plate (8) is used to guide the air flow entering from the air inlet (401) to the thermoelectric power generation plate (301).

6. The gas water heater according to claim 5, characterized in that: The guide plate (8) is arranged at an angle.

7. The gas water heater according to claim 5, characterized in that A plurality of guide plates (8) are provided at intervals along the length direction of the outer smoke tube (4), the spacing between two adjacent guide plates (8) is L1, the length of the outer smoke tube (4) is L, and L1≥L / 11.

8. The gas water heater according to claim 5, characterized in that: The height of the guide plate (8) is H, the gap between the outer layer smoke tube (4) and the inner layer smoke tube (3) is D, and H≤D / 3.

9. The gas water heater according to any one of claims 1 to 4 and 6 to 8, characterized in that: The first end of the outer smoke tube (4) is sealed and connected to the inner smoke tube (3), and the second end of the outer smoke tube (4) is provided with an opening, through which the airflow channel (6) is connected to the entire machine housing.

10. The gas water heater according to any one of claims 1 to 4 and 6 to 8, characterized in that: The thermoelectric power generation sheet (301) is made of non-metallic material.

11. The gas water heater according to any one of claims 1 to 4 and 6 to 8, characterized in that: A transformer, a voltage stabilizer, a rectifier, and a capacitor are connected in series between the thermoelectric power generation sheet (301) and the power source (2).

12. The gas water heater according to any one of claims 1 to 4 and 6 to 8, characterized in that: The mainboard (1) is provided with a power supply interface, and the power supply interface is suitable for connecting to an emergency power supply device.

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