Flue and gas water heater

Abstract

The utility model discloses a flue pipe and gas water heater of gas water heater, flue pipe includes: the pipe body extends along the horizontal direction, and is used for with the fan communication of gas water heater, the water storage tank is connected in the bottom of pipe body, and with pipe body inside communication, the water storage tank has the water outlet, the water level detection part is installed in the water storage tank, and the detection end of water level detection part stretches into the water storage tank inside, the plugging end of plugging part abuts at the water outlet, and is used for according to the detection result of water level detection part to open or plugging the water outlet. Adopt this scheme, the water storage tank can collect the rainwater in the pipe body, avoid the rainwater gathering in the pipe body, thereby even when the pipe body is inclined or the rain is too big, the rainwater will not directly enter the water heater inside. Through the detection of water level detection part and the plugging part can open or plugging the water outlet, thereby if the rainwater of pipe body enters too much, the rainwater amount of water storage tank is too big, can discharge in time, guarantees the performance safety of water heater.

Description

Technical Field

[0001] This utility model relates to a flue pipe for a gas water heater and a gas water heater. Background Technology

[0002] In homes, the exhaust ducts of gas water heaters are constantly affected by the external environment, causing the exhaust pipes to tilt upwards. This allows rainwater to flow into the exhaust duct and enter the water heater, affecting its normal operation. The heat exchanger and burner inside the water heater are also susceptible to corrosion due to the humid environment, shortening the lifespan of the gas water heater. During typhoons and heavy rains, even properly installed exhaust pipes can experience rainwater backflow. While double-layered exhaust pipes in current gas water heaters can reduce the amount of rainwater entering, they cannot completely prevent rainwater from entering the water heater altogether. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect that the exhaust pipe of the gas water heater in the prior art cannot prevent rainwater from entering the water heater, and to provide a flue pipe and a gas water heater.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A flue pipe for a gas water heater, the flue pipe comprising:

[0006] A pipe body that extends horizontally and is used to connect to the fan of a gas water heater;

[0007] A water storage tank is connected to the bottom of the pipe body and communicates with the inside of the pipe body. The water storage tank has a water outlet.

[0008] A water level detection unit is installed in the water storage tank, and the detection end of the water level detection unit extends into the interior of the water storage tank.

[0009] The sealing part has its sealing end abutting against the water outlet and is used to open or seal the water outlet according to the detection result of the water level detection part.

[0010] In this design, the pipe body can be used for the exhaust of the gas water heater. A water storage tank is installed at the bottom of the pipe body to collect rainwater entering the pipe body, preventing rainwater from accumulating inside. Therefore, even if the pipe body is tilted upwards or the rainfall is excessive, rainwater will not directly enter the water heater. The water level detection unit and the sealing unit can open or close the outlet, ensuring that if too much rainwater enters the pipe body or the amount of rainwater accumulating in the storage tank is too large, it can be discharged in time, ensuring the performance and safety of the water heater.

[0011] Preferably, the water storage tank includes a horizontal section and two connecting sections, the two connecting sections being connected to both ends of the horizontal section, and the two ends of the horizontal section being connected to the pipe body via the two connecting sections; the water outlet is located at the bottom of the horizontal section.

[0012] In this design, rainwater entering the pipe body can enter the water storage tank through the connection between the connecting section and the pipe body, and first accumulate in the horizontal section. As the amount of rainwater increases, it further accumulates in the connecting section. The outlet is located at the bottom of the horizontal section, which is at the bottom of the water storage tank, facilitating rainwater drainage.

[0013] Preferably, the water level detection unit is installed in one of the two connecting sections, and the water level detection unit includes multiple detection ends that extend vertically into the connecting section at intervals.

[0014] In this solution, multiple detection terminals can detect the water level in the water storage tank at different heights, thereby enabling more accurate drainage control of the rainwater accumulated in the water storage tank based on the detection results.

[0015] Preferably, the water level detection unit includes a first electrode, a second electrode, a third electrode, and an electrical connection wire. The detection ends of the first electrode, the second electrode, and the third electrode extend sequentially into the connecting section from the bottom to the top, and the first electrode, the second electrode, and the third electrode are all connected to the electrical connection wire.

[0016] In this design, when rainwater flows back into the pipe, it gradually accumulates in the storage tank. When the water level only covers the first electrode, the sealing section can be controlled to block the outlet. When the water level covers the first and second electrodes, and the rainwater sensing circuit outputs a signal for a certain period of time, if it remains continuous, it is determined that rainwater is flowing back, thus avoiding interference from the instantaneous dripping of condensate. At this time, the gas water heater can still be used normally, and a message can be sent to the user to remind them that rainwater has flowed back into the flue and needs to be drained in time. When the water level covers the first, second, and third electrodes simultaneously, the circuit will transmit a signal of excessively high water level to the controller. At this time, there is a risk of rainwater flowing back into the water heater. In this case, the gas supply can be immediately cut off and the water heater can be stopped to prevent rainwater from flowing back and causing abnormal combustion and damage to components. At the same time, the sealing section is controlled to open the outlet to drain the accumulated rainwater.

[0017] Preferably, the connecting section is arranged at an angle.

[0018] In this scheme, the inclined arrangement of the connecting section not only facilitates the entry of rainwater into the water storage tank, but also increases the water storage capacity of the water storage tank.

[0019] Preferably, the sealing part is a solenoid valve, which includes a control part, a piston and a spring. The control part is located outside the water storage tank, the piston is connected to the control part and extends into the water storage tank to abut against the water outlet, and the spring is sleeved on the piston.

[0020] In this solution, through the above structure, the control unit can control the piston to open the water outlet, and the piston can block the water outlet under the action of the spring.

[0021] Preferably, the flue also includes a controller, which is electrically connected to the water level detection unit and the sealing unit respectively.

[0022] Preferably, the controller is an electronic controller for a gas water heater.

[0023] Preferably, the flue also includes a receiving device connected to the outlet.

[0024] In this solution, a receiving device is placed at the water outlet to collect rainwater and prevent rainwater from splashing out of the flue.

[0025] A gas water heater includes a flue pipe as described above, and a flue channel, one end of which is connected to the fan of the gas water heater, and the other end of which is connected to the outside; the flue pipe is detachably connected to the flue channel, and the pipe body of the flue pipe is connected to the flue channel.

[0026] In this solution, a detachable rainwater backflow prevention flue pipe is used to prevent rainwater from entering the gas water heater and causing safety accidents. This flue pipe is detachable; after a period of use, the condensate may contain minerals, which can accumulate and cause conductivity between the electrodes. Users can disassemble and clean the electrode surfaces to remove scale and dust, thus extending the lifespan of this structure.

[0027] The positive and progressive effects of this utility model are as follows: the pipe body can be used for the exhaust of gas water heaters; a water storage tank is set at the bottom of the pipe body to collect rainwater entering the pipe body, preventing rainwater from accumulating inside the pipe. Therefore, even when the pipe body is tilted upwards or the rainfall is excessive, rainwater will not directly enter the water heater. The water level detection unit and the sealing unit can open or close the outlet, so if too much rainwater enters the pipe body or the amount of rainwater accumulating in the storage tank is too large, it can be discharged in time, ensuring the performance and safety of the water heater. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of a gas water heater provided in an embodiment of this utility model;

[0029] Figure 2This is a schematic diagram of the structure of a flue provided in an embodiment of the present utility model;

[0030] Figure 3 The control flowchart of the flue provided in the embodiment of this utility model.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10 flue pipe, 100 pipe body, 200 water storage tank, 210 water outlet, 220 horizontal section, 230 connecting section, 300 water level detection unit, 311 first electrode, 312 second electrode, 313 third electrode, 314 electrical wiring, 400 sealing unit, 410 solenoid valve, 411 control unit, 412 piston, 413 spring, 1 gas water heater, 20 flue gas exhaust channel, 30 fan, 40 electric controller, 50 heat exchanger, 60 burner, 70 gas proportional valve. Detailed Implementation

[0033] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0034] This utility model provides a flue pipe 10 for a gas water heater 1, such as Figure 1 and Figure 2 As shown, the flue pipe 10 includes a pipe body 100, a water storage tank 200, a water level detection unit 300, and a sealing unit 400. The pipe body 100 extends horizontally and is used to communicate with the fan 30 of the gas water heater 1. The water storage tank 200 is connected to the bottom of the pipe body 100 and communicates with the inside of the pipe body 100. The water storage tank 200 has a water outlet 210. The water level detection unit 300 is installed in the water storage tank 200, and the detection end of the water level detection unit 300 extends into the inside of the water storage tank 200. The sealing end of the sealing unit 400 abuts against the water outlet 210 and is used to open or seal the water outlet 210 according to the detection result of the water level detection unit 300. The pipe body 100 is used for exhaust of the gas water heater 1. A water storage tank 200 is installed at the bottom of the pipe body 100 to collect rainwater entering the pipe body 100, preventing rainwater from accumulating inside. Therefore, even if the pipe body 100 is tilted upwards or the rainfall is excessive, rainwater will not directly enter the water heater. The water level detection unit 300 and the sealing unit 400 can open or block the water outlet 210, so that if too much rainwater enters the pipe body 100 and the amount of rainwater accumulated in the water storage tank 200 is too large, it can be discharged in time, ensuring the performance and safety of the water heater.

[0035] like Figure 1As shown, the flue pipe 10 can be applied to an existing gas water heater 1. The interior of an existing gas water heater 1 generally includes a gas proportional valve 70, a burner 60, a heat exchanger 50, and a fan 30 from bottom to top. Gas, regulated by the gas proportional valve 70, enters the burner 60 for combustion and exchanges heat with water through the heat exchanger 50. The fan 30 discharges the heat-exchanged gas through the exhaust channel 20, which connects to the outside, thus venting the gas outdoors. The flue pipe 10 provided in this embodiment can be directly used as the exhaust channel 20 of the gas water heater 1, connecting the fan 30 to the outside; it can also be used as part of an existing exhaust channel 20, preferably connected to the existing exhaust channel 20 in a detachable manner. In the following description, the flue pipe 10 is used as an example of being part of an existing exhaust channel 20 for detailed explanation. Further, as... Figure 1 and Figure 2 As shown, the pipe body 100 is a horizontally extending pipe, with both ends of the pipe body 100 connected to the horizontal extension section of the smoke exhaust channel 20 and serving as part of that horizontal extension section. The water storage tank 200 is connected to the bottom of the horizontal pipe body 100.

[0036] like Figure 1 and Figure 2 As shown, the water storage tank 200 includes a horizontal section 220 and two connecting sections 230. The two connecting sections 230 are respectively connected to both ends of the horizontal section 220, and both ends of the horizontal section 220 are connected to the pipe body 100 via the two connecting sections 230. The outlet 210 is located at the bottom of the horizontal section 220. Further, the horizontal section 220 is located below and spaced apart from the horizontally extending pipe body 100, and the water storage tank 200 has a roughly U-shaped structure. Rainwater entering the pipe body 100 can enter the water storage tank 200 through the connection between the connecting section 230 and the pipe body 100, and first accumulates in the horizontal section 220, and further accumulates in the connecting section 230 as the amount of rainwater increases. The outlet 210 is located at the bottom of the horizontal section 220, which is at the bottom end of the water storage tank 200, facilitating rainwater drainage.

[0037] Furthermore, such as Figure 2 As shown, the connecting section 230 is arranged at an angle. The angled arrangement of the connecting section 230 not only facilitates the entry of rainwater into the water storage tank 200, but also increases the water storage capacity of the water storage tank 200.

[0038] like Figure 1 and Figure 2 As shown, the water level detection unit 300 is installed in one of the two connecting sections 230. The water level detection unit 300 includes multiple detection ends, which extend vertically into the connecting section 230 at intervals. The multiple detection ends can detect the water level in the water storage tank 200 at different heights, thereby enabling more accurate drainage control of the rainwater accumulated in the water storage tank 200 based on the detection results.

[0039] Furthermore, such as Figure 1 and Figure 2 As shown, the water level detection unit 300 includes a first electrode 311, a second electrode 312, a third electrode 313, and an electrical connection wire 314. The detection ends of the first electrode 311, the second electrode 312, and the third electrode 313 extend sequentially and alternately into the connecting section 230 from the bottom to the top. The first electrode 311, the second electrode 312, and the third electrode 313 are all connected to the electrical connection wire 314. Wherein, as... Figure 2 As shown, the first electrode 311 and the second electrode 312 are a certain distance apart in the vertical direction. This distance can prevent the electrode from being accidentally touched by the condensate droplets formed on the surface of the flue pipe 10 by the high-temperature flue gas discharged from the water heater if the distance is too small, and can also prevent the electrode sensing sensitivity from being reduced due to the distance being too large.

[0040] In practical implementation, the water level detection device uses a conductivity-type or probe-type sensor. Typically, two or more metal probes, or electrodes, are installed inside the water storage tank 200, usually with one common terminal and one or more detection terminals. When the water level is below the detection probes, the two probes are insulated from each other by air, resulting in extremely high resistance, equivalent to an open circuit. The controller detects this high resistance / open circuit state and determines that the water level is normal or low. When the water level in the storage tank 200 rises to contact the detection probes, a conductive path is formed between the two probes, and the resistance drops significantly. The controller detects this change in resistance or the interruption of current flow and determines that the water level has reached the preset height. Figure 2 As shown, the electrode probe extends into the water storage tank 200 and is fixed with screws.

[0041] like Figure 1 and Figure 2 As shown, the blocking part 400 is a solenoid valve 410. The solenoid valve 410 includes a control part 411, a piston 412, and a spring 413. The control part 411 is located outside the water storage tank 200. The piston 412 is connected to the control part 411 and extends into the water storage tank 200 to abut against the outlet 210. The spring 413 is sleeved on the piston 412. The control part 411 can control the piston 412 to open the outlet 210, and the piston 412 can block the outlet 210 under the action of the spring 413. Specifically, as shown... Figure 2As shown, the control unit 411 can be placed in the space between the horizontal section 220 and the pipe body 100; the piston 412 extends vertically into the horizontal section 220 and is directly opposite the outlet 210, with the piston 412 in an inverted T shape; the spring 413 is sleeved on the rod of the piston 412, with its two ends abutting against the end plates of the control unit 411 and the piston 412. The solenoid valve 410 is controlled by the controller. Under normal conditions, the solenoid valve 410 controls the piston 412 to block the outlet 210. When the water level in the water storage tank 200 is too high and needs to be drained, the controller outputs a current signal to control the solenoid valve 410 to open the piston 412, and the accumulated water in the water storage tank 200 is discharged.

[0042] In specific implementation, the sealing part 400 can be a pilot-operated solenoid valve 410, which is normally closed. When the power is off, the water circuit is closed, and the piston 412 blocks the outlet 210 under the action of the spring 413. The voltage is DC12V, and it is made of NBR nitrile rubber or EPDM ethylene propylene diene monomer rubber. The shape of the piston 412 can be conical or flat-headed columnar. An O-ring is added to the side of the piston 412 to prevent leakage.

[0043] The flue pipe 10 also includes a controller, which is electrically connected to the water level detection unit 300 and the sealing unit 400 respectively. Preferably, the controller is the electronic controller 40 of the gas water heater 1.

[0044] The flue pipe 10 also includes a receiving device connected to the outlet 210. The receiving device is placed at the outlet 210 to collect rainwater and prevent rainwater discharged from the flue pipe 10 from splashing.

[0045] When rainwater flows back into the flue pipe 10, it gradually accumulates in the water storage tank 200, such as Figure 3 As shown, the control process is as follows: when the water level only covers the first electrode 311, i.e., I... 1,2 When the water level is <0, the solenoid valve 410 controls the piston 412 to block the outlet 210. When the water level exceeds the first electrode 311 and the second electrode 312, the controller 40 detects that the signal output by the rainwater sensing cable 314 exceeds a first predetermined time, such as 10 seconds, i.e., I 1,2 >0 and T 1,2If the time exceeds 10 seconds, it is determined to be rainwater backflow. At this time, the gas water heater 1 can still be used normally, and the buzzer on the controller 40 will be triggered to send a message to the user, reminding the user that rainwater has backflowed into the flue pipe 10 and needs to be drained in time. The user can select the drainage function designed for the gas water heater 1. The controller 40 controls the solenoid valve 410 to pull open the piston 412. At the same time, the user can place a container under the water outlet 210 of the flue pipe 10 to collect rainwater and prevent the rainwater discharged from the flue pipe 10 from splashing. Among them, the signal output of the setting electric sensor 314 exceeds the predetermined time, which can avoid interference from the instantaneous dripping of condensate. When the water level simultaneously exceeds the first electrode 311, the second electrode 312 and the third electrode 313, and the signal output of the rainwater sensing electric sensor 314 of the controller 40 exceeds the second predetermined time, such as 5 seconds, i.e., I 1,2,3 >0 and T 1,2,3 If the water level exceeds 5 seconds, the electrical cable 314 will transmit a signal indicating that the water level is too high to the controller 40. At this point, there is a risk of rainwater backflowing into the water heater. The controller 40 will immediately cut off the gas supply and stop the water heater from operating, preventing rainwater backflow from causing abnormal combustion and damaging components. Simultaneously, the controller 40 will force the solenoid valve 410 to open the piston 412, discharging the accumulated rainwater. During the rainwater discharge process, the controller 40 will monitor the signal transmitted by the electrical cable 314 in real time. When the water level only exceeds the first electrode 311, i.e., I... 1,2 When the water level is below 0, after a 10-second delay (to ensure rainwater is drained), the solenoid valve 410 controls the piston 412 to block the outlet 210, at which point the water heater can operate normally. Subsequently, the controller 40 will monitor the water level in the storage tank 200 in real time, promptly notifying the user of any abnormalities and taking appropriate drainage measures to ensure that rainwater does not enter the water heater, improving its safety performance during heavy rain and extending its service life.

[0046] This utility model also provides a gas water heater 1, such as Figure 1 As shown, the gas water heater 1 includes a flue pipe 10 as described above, and also includes an exhaust duct 20. One end of the exhaust duct 20 is connected to the fan 30 of the gas water heater 1, and the other end is connected to the outside. The flue pipe 10 and the exhaust duct 20 are detachably connected, and the pipe body 100 of the flue pipe 10 is connected to the exhaust duct 20. The detachable rainwater backflow prevention flue pipe 10 prevents rainwater from entering the gas water heater 1 and causing safety accidents. Because the flue pipe 10 is a detachable structure, after a period of use, the condensate may contain minerals, which can accumulate over time and cause conductivity between the electrodes. Users can disassemble and clean the scale and dust on the electrode surface themselves, thus extending the service life of this structure.

[0047] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A flue pipe for a gas water heater, characterized in that, The flue includes: A pipe body that extends horizontally and is used to connect to the fan of a gas water heater; A water storage tank is connected to the bottom of the pipe body and communicates with the inside of the pipe body. The water storage tank has a water outlet. A water level detection unit is installed in the water storage tank, and the detection end of the water level detection unit extends into the interior of the water storage tank. The sealing part has its sealing end abutting against the water outlet and is used to open or seal the water outlet according to the detection result of the water level detection part.

2. The flue pipe of the gas water heater as described in claim 1, characterized in that, The water storage tank includes a horizontal section and two connecting sections. The two connecting sections are respectively connected to both ends of the horizontal section, and the two ends of the horizontal section are connected to the pipe body via the two connecting sections. The water outlet is located at the bottom of the horizontal section.

3. The flue pipe of the gas water heater as described in claim 2, characterized in that, The water level detection unit is installed in one of the two connecting sections. The water level detection unit includes multiple detection ends, which extend vertically into the connecting section at intervals.

4. The flue pipe of the gas water heater as described in claim 3, characterized in that, The water level detection unit includes a first electrode, a second electrode, a third electrode, and an electrical connection wire. The detection ends of the first electrode, the second electrode, and the third electrode extend into the connecting section from the bottom to the top in sequence at intervals. The first electrode, the second electrode, and the third electrode are all connected to the electrical connection wire.

5. The flue pipe of the gas water heater as described in claim 3, characterized in that, The connecting section is arranged at an angle.

6. The flue pipe of the gas water heater as described in claim 1, characterized in that, The sealing part is a solenoid valve, which includes a control part, a piston and a spring. The control part is located outside the water storage tank. The piston is connected to the control part and extends into the water storage tank to abut against the water outlet. The spring is sleeved on the piston.

7. The flue pipe of the gas water heater as described in claim 6, characterized in that, The flue also includes a controller, which is electrically connected to the water level detection unit and the sealing unit respectively.

8. The flue pipe of the gas water heater as described in claim 7, characterized in that, The controller is the electronic controller for a gas water heater.

9. The flue pipe of the gas water heater as described in claim 1, characterized in that, The flue also includes a receiving device, which is connected to the water outlet.

10. A gas water heater, characterized in that, The gas water heater includes a flue pipe as described in any one of claims 1-9, the gas water heater has a flue channel, one end of the flue channel is connected to the fan of the gas water heater, and the other end is connected to the outside; the flue pipe is detachably connected to the flue channel, and the pipe body of the flue pipe is connected to the flue channel.

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