Gas water heater capable of preventing carbon monoxide leakage and poisoning

Abstract

The invention relates to the technical field of gas water heaters, and particularly discloses a gas water heater capable of preventing carbon monoxide leakage and poisoning, which comprises a shell, a combustion unit and a heat exchange unit which are arranged in the shell, and a smoke exhaust and air supply unit which comprises a smoke exhaust hood, a smoke exhaust pipe and a fan, the smoke exhaust hood is arranged in the shell and used for collecting smoke generated by the combustion unit, the smoke exhaust pipe comprises an inner pipe and an outer pipe coaxially arranged outside the inner pipe in a sleeving mode, a first channel for gas circulation is formed in the inner pipe, and a gap between the outer pipe and the inner pipe forms a second channel for gas circulation. An impeller of the fan comprises a first blade part installed in the first channel and a second blade part installed in the second channel, and the blade angle of the first blade part is opposite to the blade angle of the second blade part. According to the gas water heater capable of preventing carbon monoxide leakage and poisoning, generation of carbon monoxide can be reduced, and therefore the situation of carbon monoxide leakage and poisoning is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of gas water heaters, and in particular to a gas water heater capable of preventing poisoning caused by carbon monoxide leakage. Background Art

[0002] Gas water heaters heat water mainly by burning combustible gases such as natural gas and liquefied gas. Carbon dioxide and a very small amount of carbon monoxide are produced during the combustion process. However, if there is a problem such as insufficient oxygen supply during the combustion process, it will lead to incomplete combustion, thereby producing carbon monoxide gas that is harmful to the human body. For example, a utility model patent with publication number CN 220017735U discloses a gas water heater prevention device for preventing carbon monoxide leakage and poisoning. The device can form a double-layer protection system for the combustion chamber used for weather combustion through an outer shell and an inner shell, and can also store and isolate the carbon monoxide gas leaked from the combustion chamber. However, in actual use, although the chamber between the outer shell and the inner shell can store a certain amount of carbon monoxide, it cannot fundamentally solve the problem of carbon monoxide generation during the use of the gas water heater due to insufficient oxygen supply. Summary of the invention

[0003] The present invention aims to solve at least one of the above-mentioned technical problems and provide a gas water heater that can prevent carbon monoxide leakage and poisoning, which can reduce the generation of carbon monoxide and thus effectively prevent the occurrence of carbon monoxide leakage and poisoning.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a gas water heater that can prevent carbon monoxide leakage and poisoning, comprising a shell, and a combustion unit and a heat exchange unit arranged in the shell, the shell having a plurality of vents, and also comprising a smoke exhaust and air supply unit, the smoke exhaust and air supply unit comprising a smoke exhaust hood, a smoke exhaust pipe and a fan, the smoke exhaust hood is arranged in the shell for collecting smoke generated by the combustion unit, the smoke exhaust pipe comprises an inner tube and an outer tube coaxially sleeved outside the inner tube, the interior of the inner tube constitutes a first channel for gas circulation, the gap between the outer tube and the inner tube constitutes a second channel for gas circulation, one end of the first channel and the second channel both extend to the outdoors, the other end of the first channel is connected to the smoke exhaust hood, and the other end of the second channel is connected to the combustion unit through the air supply channel, the fan is installed on the smoke exhaust pipe, and the impeller of the fan comprises a first blade portion installed in the first channel, and a second blade portion installed in the second channel, the blade angle of the first blade portion is opposite to the blade angle of the second blade portion.

[0005] Preferably, the smoke exhaust hood includes a covering portion that completely covers the combustion unit and the heat exchange unit, and a connecting portion, the bottom of the covering portion is connected to the vent hole at the bottom of the shell, and the connecting portion is funnel-shaped, with the end with a large opening connected to the top of the covering portion and the end with a small opening connected to the smoke exhaust pipe.

[0006] Preferably, a carbon monoxide concentration detection device is provided at the connection between the smoke exhaust hood and the smoke exhaust pipe. The carbon monoxide concentration detection device is connected to the fan and can control the fan speed according to the detected carbon monoxide concentration.

[0007] Preferably, a carbon monoxide processing unit is provided on the smoke exhaust pipe, and the carbon monoxide concentration detection device is connected to the carbon monoxide processing unit and can control the operation of the carbon monoxide processing unit according to the detected carbon monoxide concentration.

[0008] Preferably, the carbon monoxide treatment unit includes a carbon monoxide treatment device, an air inlet channel, an air outlet channel and a control valve. A waste gas inlet and a waste gas outlet are provided on the smoke exhaust pipe. The waste gas inlet and the waste gas outlet are connected to the carbon monoxide treatment device through the air inlet channel and the air outlet channel respectively. The control valve can control the opening and closing of the waste gas inlet and the waste gas outlet, as well as control the opening and closing of the smoke exhaust pipe between the waste gas inlet and the waste gas outlet.

[0009] Preferably, the control valve includes a first control valve and a second control valve respectively arranged at the exhaust gas inlet and the exhaust gas outlet, and the first control valve and the second control valve both include a rotating shaft, and a first rotating plate and a second rotating plate installed on the rotating shaft, and the rotating shaft is connected to a driving device, and the driving device can drive the rotating shaft to rotate so that the first rotating plate opens the smoke exhaust pipe between the exhaust gas inlet and the exhaust gas outlet, and the second rotating plate closes the exhaust gas inlet and the exhaust gas outlet, or the first rotating plate closes the smoke exhaust pipe between the exhaust gas inlet and the exhaust gas outlet, and the second rotating plate opens the exhaust gas inlet and the exhaust gas outlet.

[0010] Preferably, the driving device is a motor, the output shaft of the motor is connected to a driving gear, and the rotating shafts of the first control valve and the second control valve are both connected to a transmission gear meshing with the driving gear.

[0011] Preferably, the carbon monoxide treatment device is an ozone generator.

[0012] The beneficial effect is: compared with the prior art, a gas water heater of the present invention that can prevent carbon monoxide leakage and poisoning is provided by arranging a first channel and a second channel on the smoke exhaust pipe, and the fan installed on the smoke exhaust pipe has a first blade part and a second blade part, the first blade part is installed in the first channel, and the second blade part is installed in the second channel, and the blade angle of the first blade part is opposite to the blade angle of the second blade part. When the impeller of the fan rotates, the first blade part can generate an airflow to discharge the smoke in the shell through the first channel, and at the same time, the indoor air is sucked into the combustion unit through the vent hole, and at the same time, the second blade part can generate an airflow to send outdoor air into the combustion unit, so as to provide sufficient oxygen to the combustion unit and reduce the generation of carbon monoxide during the combustion process, thereby effectively preventing carbon monoxide leakage and poisoning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a gas water heater capable of preventing poisoning caused by carbon monoxide leakage in this application; Figure 2 This is a schematic diagram of the installation structure of the fan; Figure 3 This is a schematic diagram of the installation structure of the control valve. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is referred to as being "set in the middle", it does not only mean being set in the middle, as long as it is not set at both ends within the range defined by the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0017] like Figures 1 to 3 As shown, the present application discloses a gas water heater capable of preventing carbon monoxide leakage and poisoning, comprising a shell 1, and a combustion unit 2 and a heat exchange unit 3 arranged in the shell 1. The shell 1 has a plurality of vents 4, and also comprises a smoke exhaust air supply unit, the smoke exhaust air supply unit comprises a smoke exhaust hood 5, a smoke exhaust pipe 6 and a fan 7, the smoke exhaust hood 5 is arranged in the shell 1 for collecting smoke generated by the combustion unit 2, the smoke exhaust pipe 6 comprises an inner tube 8 and an outer tube 9 coaxially sleeved outside the inner tube 8, the inner tube 8 constitutes a first channel 10 for gas circulation, the outer tube 9 The gap between the first channel 10 and the inner tube 8 constitutes a second channel 11 for gas circulation. One end of the first channel 10 and the second channel 11 both extend to the outdoors. The other end of the first channel 10 is connected to the smoke exhaust hood 5, and the other end of the second channel 11 is connected to the combustion unit 2 through the air supply channel 30. The fan 7 is installed on the smoke exhaust pipe 6, and the impeller of the fan 7 includes a first blade portion 12 installed in the first channel 10, and a second blade portion 13 installed in the second channel 11. The blade angle of the first blade portion 12 is opposite to the blade angle of the second blade portion 13.

[0018] A gas water heater capable of preventing carbon monoxide leakage and poisoning of the present invention is provided with a first channel 10 and a second channel 11 on a smoke exhaust pipe 6, and a fan 7 installed on the smoke exhaust pipe 6 has a first blade portion 12 and a second blade portion 13, the first blade portion 12 is installed in the first channel 10, and the second blade portion 13 is installed in the second channel 11, and the blade angle of the first blade portion 12 is opposite to the blade angle of the second blade portion 13, when the impeller of the fan 7 rotates, the first blade portion 12 can generate an airflow to discharge the smoke in the shell 1 out of the first channel 10, and at the same time, the indoor air is sucked into the combustion unit 2 through the vent 4, and at the same time, the second blade portion 13 can generate an airflow to send outdoor air into the combustion unit 2, so as to provide sufficient oxygen to the combustion unit 2 and reduce the generation of carbon monoxide during the combustion process, thereby effectively preventing the occurrence of carbon monoxide leakage and poisoning.

[0019] In the present application, the smoke exhaust hood 5 can be arranged above the heat exchange unit 3, or in another embodiment of the smoke exhaust hood 5, the smoke exhaust hood 5 can include a covering portion 14 that completely covers the combustion unit 2 and the heat exchange unit 3 inside it, and a connecting portion 15, the bottom of the covering portion 14 is connected to the air vent 4 at the bottom of the shell 1, and the connecting portion 15 is arranged in a funnel shape, with its end with a large opening connected to the top of the covering portion 14, and its end with a small opening connected to the smoke exhaust pipe 6. The combustion unit 2 and the heat exchange unit 3 are completely covered inside them by the covering portion 14, so that the carbon monoxide generated during the combustion of the combustion unit 2 can be completely sucked into the smoke exhaust hood 5 and completely discharged to the outside through the smoke exhaust pipe 6, and the bottom of the covering portion 14 is connected to the air vent 4, which can generate negative pressure at the air vent 4, so that the air in the room flows into the combustion unit 2 from the air vent 4.

[0020] In one of the preferred embodiments of the present application, a carbon monoxide concentration detection device 16 can be provided at the connection between the smoke exhaust hood 5 and the smoke exhaust pipe 6. The carbon monoxide concentration detection device 16 used in the present application can adopt an existing structure, by connecting the carbon monoxide concentration detection device 16 to the fan 7. The carbon monoxide concentration detection device 16 is connected to a control unit, and the control unit can control the speed of the fan 7 according to the detected carbon monoxide concentration. When it is detected that the carbon monoxide concentration in the flue gas generated after combustion exceeds the set threshold, the control unit can control the fan 7 to increase the speed of the impeller, thereby increasing the oxygen supply to the combustion unit 2, thereby reducing the carbon monoxide generated during the combustion process.

[0021] In another preferred embodiment of the present application, a carbon monoxide treatment unit can be provided on the smoke exhaust pipe 6, and the carbon monoxide concentration detection device 16 is connected to the carbon monoxide treatment unit and can control the operation of the carbon monoxide treatment unit according to the detected carbon monoxide concentration. Specifically, the carbon monoxide concentration detection device 16 is connected to the control unit, and the control unit can control the operation of the carbon monoxide treatment unit according to the detected carbon monoxide concentration. When it is detected that the carbon monoxide concentration in the flue gas generated after combustion exceeds the set threshold value, the control unit can control the carbon monoxide treatment unit to process the carbon monoxide in the flue gas and then discharge it through the smoke exhaust pipe 6, thereby reducing the carbon monoxide concentration in the discharged flue gas. When it is detected that the carbon monoxide concentration in the flue gas generated after combustion does not exceed the set threshold value, the carbon monoxide treatment unit does not work, and the flue gas is directly discharged through the smoke exhaust pipe 6.

[0022] In one embodiment, the carbon monoxide treatment unit may include a carbon monoxide treatment device 17, an air inlet channel 18, an air outlet channel 19 and a control valve. A waste gas inlet 21 and a waste gas outlet 22 are provided on the smoke exhaust pipe 6. The waste gas inlet 21 and the waste gas outlet 22 are connected to the carbon monoxide treatment device 17 through the air inlet channel 18 and the air outlet channel 19 respectively. The control valve can control the opening and closing of the waste gas inlet 21 and the waste gas outlet 22, as well as control the opening and closing of the smoke exhaust pipe 6 between the waste gas inlet 21 and the waste gas outlet 22. The control valve is connected to the control unit. When it is detected that the carbon monoxide concentration in the flue gas exceeds the set threshold, the control unit can control the control valve so that the control valves at the exhaust gas inlet 21 and the exhaust gas outlet 22 are opened, and the control valve can close the smoke exhaust pipe 6 between the exhaust gas inlet 21 and the exhaust gas outlet 22, so that the smoke enters the air intake channel 18 through the exhaust gas inlet 21, and is treated by the carbon monoxide treatment device 17, and then enters the smoke exhaust pipe 6 through the air outlet channel 19 for discharge. When it is detected that the carbon monoxide concentration in the flue gas does not exceed the set threshold, the control unit can control the control valve so that the control valves at the exhaust gas inlet 21 and the exhaust gas outlet 22 are closed, thereby closing the exhaust gas inlet 21 and the exhaust gas outlet 22, and the smoke is discharged directly from the smoke exhaust pipe 6 without passing through the carbon monoxide treatment unit. The carbon monoxide treatment device 17 used in the present application can have multiple implementations. In one implementation, the carbon monoxide treatment device 17 can be an ozone generator in the prior art. In another implementation, the carbon monoxide treatment device 17 can use a treatment tank, which has a catalyst capable of oxidizing and reducing carbon monoxide. The catalyst can be a mixture of precious metals, silicon dioxide, aluminum oxide and magnesium oxide in the prior art.

[0023] In one specific embodiment of the control valve, the control valve can be a common solenoid valve, and the exhaust gas inlet 21, the exhaust gas outlet 22, and the exhaust pipe 6 between the exhaust gas inlet 21 and the exhaust gas outlet 22 are all provided with solenoid valves. By controlling the solenoid valves, the opening and closing of the exhaust gas inlet 21 and the exhaust gas outlet 22 are controlled, and the opening and closing of the exhaust gas pipe 6 between the exhaust gas inlet 21 and the exhaust gas outlet 22 are controlled. In another embodiment of the control valve, the control valve may include a first control valve 20 and a second control valve 23 respectively provided at the exhaust gas inlet 21 and the exhaust gas outlet 22, and the first control valve 20 and The second control valve 23 includes a rotating shaft 24, and a first rotating piece 25 and a second rotating piece 26 installed on the rotating shaft 24. The rotating shaft 24 is connected to a driving device 27, and the driving device 27 can drive the rotating shaft 24 to rotate, so that the first rotating piece 25 opens the smoke exhaust pipe 6 located between the exhaust gas inlet 21 and the exhaust gas outlet 22, and the second rotating piece 26 closes the exhaust gas inlet 21 and the exhaust gas outlet 22, or the first rotating piece 25 closes the smoke exhaust pipe 6 located between the exhaust gas inlet 21 and the exhaust gas outlet 22, and the second rotating piece 26 opens the exhaust gas inlet 21 and the exhaust gas outlet 22. The first rotating piece 25 of the first control valve 20 matches the cross section of the first channel 10, and the second rotating piece 26 of the first control valve 20 is provided with a connecting hole corresponding to the exhaust gas inlet 21. The first rotating piece 25 of the second control valve 23 matches the cross section of the first channel 10, and the second rotating piece 26 of the second control valve 23 is provided with a connecting hole corresponding to the exhaust gas outlet 22. The first rotating piece 25 and the second rotating piece 26 on the rotating shaft 24 can be rotated synchronously by rotating the rotating shaft 24, such as Figure 3 As shown, when the rotating shaft 24 of the first control valve 20 and the second control valve 23 rotates to the point where the first rotating piece 25 is parallel to the length direction of the first channel 10, the first rotating piece 25 fully opens the first channel 10, and the second rotating pieces 26 of the first control valve 20 and the second control valve 23 respectively connect the exhaust gas inlet 21 and the exhaust gas outlet 22, and the smoke is directly discharged through the smoke exhaust pipe 6. When the rotating shaft 24 of the first control valve 20 and the second control valve 23 rotates to the point where the first rotating piece 25 is perpendicular to the length direction of the first channel 10, the first rotating piece 25 fully closes the first channel 10, and the connecting holes on the second rotating pieces 26 of the first control valve 20 and the second control valve 23 respectively connect the exhaust gas inlet 21 and the exhaust gas outlet 22, so that the exhaust gas inlet 21 and the exhaust gas outlet 22 are fully open, and the smoke is treated by the carbon monoxide treatment unit and then discharged through the smoke exhaust pipe 6.

[0024] In one preferred implementation of the above embodiment, the driving device 27 can be a motor, the output shaft of the motor is connected to the driving gear 28, and the rotating shafts 24 of the first control valve 20 and the second control valve 23 are both connected to the transmission gear 29 meshing with the driving gear 28. The rotation of the motor can be controlled to control the synchronous rotation of the two rotating shafts 24 to achieve the synchronous opening or closing of the exhaust gas inlet 21 and the exhaust gas outlet 22.

[0025] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Any modification or equivalent substitution that does not depart from the spirit and scope of the present invention shall be included in the scope of the technical solution of the present invention.

Claims

1. A gas water heater capable of preventing carbon monoxide leakage and poisoning, comprising a shell (1), and a combustion unit (2) and a heat exchange unit (3) arranged in the shell (1), the shell (1) having a plurality of vent holes (4), characterized in that: The invention also comprises a smoke exhaust air supply unit, which comprises a smoke exhaust hood (5), a smoke exhaust pipe (6) and a fan (7). The smoke exhaust hood (5) is arranged in the housing (1) for collecting smoke generated by the combustion unit (2). The smoke exhaust pipe (6) comprises an inner tube (8) and an outer tube (9) coaxially sleeved outside the inner tube (8). The interior of the inner tube (8) forms a first channel (10) for gas circulation. The gap between the outer tube (9) and the inner tube (8) forms a second channel (11) for gas circulation. The first channel (10) and the second channel (11) are connected to each other. One end of the first channel (10) and the second channel (11) extend to the outdoors, the other end of the first channel (10) is connected to the smoke exhaust hood (5), the other end of the second channel (11) is connected to the combustion unit (2) via the air supply channel (30), the fan (7) is installed on the smoke exhaust pipe (6), and the impeller of the fan (7) comprises a first blade portion (12) installed in the first channel (10), and a second blade portion (13) installed in the second channel (11), and the blade angle of the first blade portion (12) is opposite to the blade angle of the second blade portion (13).

2. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 1, characterized in that: The smoke exhaust hood (5) comprises a hood portion (14) which completely covers the combustion unit (2) and the heat exchange unit (3), and a connecting portion (15). The bottom of the hood portion (14) is connected to the vent hole (4) at the bottom of the shell (1). The connecting portion (15) is arranged in a funnel shape, with the end with a large opening connected to the top of the hood portion (14) and the end with a small opening connected to the smoke exhaust pipe (6).

3. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 1, characterized in that: A carbon monoxide concentration detection device (16) is provided at the connection between the smoke exhaust hood (5) and the smoke exhaust pipe (6); the carbon monoxide concentration detection device (16) is connected to the fan (7) and is capable of controlling the rotation speed of the fan (7) according to the detected carbon monoxide concentration.

4. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 3, characterized in that: The smoke exhaust pipe (6) is provided with a carbon monoxide processing unit, and the carbon monoxide concentration detection device (16) is connected to the carbon monoxide processing unit and can control the operation of the carbon monoxide processing unit according to the detected carbon monoxide concentration.

5. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 4, characterized in that: The carbon monoxide treatment unit comprises a carbon monoxide treatment device (17), an air inlet channel (18), an air outlet channel (19) and a control valve. A waste gas inlet (21) and a waste gas outlet (22) are provided on the smoke exhaust pipe (6). The waste gas inlet (21) and the waste gas outlet (22) are connected to the carbon monoxide treatment device (17) via the air inlet channel (18) and the air outlet channel (19), respectively. The control valve can control the opening and closing of the waste gas inlet (21) and the waste gas outlet (22), and control the opening and closing of the smoke exhaust pipe (6) between the waste gas inlet (21) and the waste gas outlet (22).

6. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 5, characterized in that: The control valve comprises a first control valve (20) and a second control valve (23) which are respectively arranged at an exhaust gas inlet (21) and an exhaust gas outlet (22); the first control valve (20) and the second control valve (23) both comprise a rotating shaft (24), and a first rotating plate (25) and a second rotating plate (26) which are mounted on the rotating shaft (24); the rotating shaft (24) is connected to a driving device (27); the driving device (27) is capable of driving the rotating shaft (24) to rotate so that the first rotating plate (25) opens a smoke exhaust pipe (6) between the exhaust gas inlet (21) and the exhaust gas outlet (22), and the second rotating plate (26) closes the exhaust gas inlet (21) and the exhaust gas outlet (22); or the first rotating plate (25) closes the smoke exhaust pipe (6) between the exhaust gas inlet (21) and the exhaust gas outlet (22), and the second rotating plate (26) opens the exhaust gas inlet (21) and the exhaust gas outlet (22).

7. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 6, characterized in that: The driving device (27) is a motor, the output shaft of the motor is connected to a driving gear (28), and the rotating shafts (24) of the first control valve (20) and the second control valve (23) are both connected to a transmission gear (29) meshing with the driving gear (28).

8. A gas water heater capable of preventing carbon monoxide leakage and poisoning according to claim 1, characterized in that: The carbon monoxide treatment device (17) is an ozone generator.

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