CN210800148U - Backflow prevention device and combustion water heater thereof - Google Patents
Backflow prevention device and combustion water heater thereof Download PDFInfo
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- CN210800148U CN210800148U CN201921487815.1U CN201921487815U CN210800148U CN 210800148 U CN210800148 U CN 210800148U CN 201921487815 U CN201921487815 U CN 201921487815U CN 210800148 U CN210800148 U CN 210800148U
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Abstract
The utility model relates to a water heater technical field relates to a prevent flow reversal device and burning water heater thereof. The backflow preventing device comprises a shell, a movable valve core, a guide rod and a spring, wherein an air inlet and an air outlet are respectively arranged at two ends of the shell, the movable valve core is sleeved on the guide rod, the air inlet and the air outlet are respectively provided with a hole, and the guide rod penetrates through the guide hole and can move back and forth in the guide hole; the spring is sleeved on the guide rod and positioned between the air outlet and the movable valve core; when the movable valve core is in an initial state, the movable valve core is in sealing contact with the air inlet and is used for shielding the air inlet. The utility model provides a prevent flow reversal device and burning water heater thereof, fan blow open prevents flow reversal device during normal use, and movable valve element closes prevents flow reversal device under the spring action when the fan is closed, prevents that acid vapor from flowing backwards to the fan casing on, gas mixing arrangement etc. and producing and corrode, influences the product normal use, has effectively improved the life of water heater.
Description
Technical Field
The utility model relates to a water heater technical field, more specifically relates to a prevent flow reversal device and burning water heater thereof.
Background
The full premix combustion water heater is generally of an inverted combustion structure, a fan is located above a combustor, the combustor is located on the upper portion of a heat exchanger, the fan sucks mixed gas of gas and air during normal combustion, heat exchange is carried out on the heat exchanger after combustion of the combustor, condensate water is generated, the condensate water and the flue gas flow downwards together, high-temperature flue gas and water vapor remained after shutdown can rise to parts such as the fan along an air inlet channel of the mixed gas, acidic condensate water is formed when the acidic water vapor forms condensation in the parts, parts such as a fan shell and a gas mixing device are corroded, and normal use of products is affected.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome above-mentioned prior art vapor and produce the defect of corruption to the fan, provide a prevent flow reversal device and burning water heater thereof, can effectively prevent vapor flow direction fan, avoid the fan to be corroded.
In order to solve the technical problem, the utility model discloses a technical scheme is: a backflow prevention device comprises a shell, a movable valve element, a guide rod and a spring, wherein an air inlet and an air outlet are respectively arranged at two ends of the shell, the movable valve element is sleeved on the guide rod, guide holes corresponding to the guide rod are respectively arranged at the air inlet and the air outlet, and the guide rod penetrates through the guide holes and can move back and forth in the guide holes; the spring is sleeved on the guide rod, is fixedly connected with the guide rod and is positioned between the air outlet and the movable valve core; when the movable valve core is in an initial state, the movable valve core is in sealing contact with the air inlet and is used for shielding the air inlet. When the water heater is used, one end of the air inlet is communicated with an air outlet of a fan of the water heater, and the air outlet is communicated with an air inlet of the combustor; when the fan is in a stop state, the spring is in a normal state, and the movable valve core is in sealing contact with the air inlet at the moment, or the spring is in a compressed state, and the movable valve core is propped against the air inlet by the elasticity of the spring and is in sealing contact with the air inlet; the movable valve core shields the air inlet, so that the water vapor generated from one end of the combustor is shielded by the movable valve core and cannot flow back to the fan, and the fan is prevented from being corroded by the water vapor; when the fan starts to operate, the movable valve core is under the action of the blowing force of wind and moves towards one end of the air outlet, at the moment, the spring is compressed, the movable valve core is separated from the air inlet, the wind blown out by the fan blows into the shell from the air inlet and enters the combustor from the air outlet, and at the moment, as the wind blows in continuously, water vapor cannot flow into the fan; through the utility model provides a prevent flow reversal device, fan blow-off prevents flow reversal device during normal use, and movable valve element closes under the spring action prevents flow reversal device when the fan is closed, prevents that acid vapor from flowing backwards and reachs production such as fan casing, gas mixing arrangement and corrode, influences product normal use.
Furthermore, the air inlet is communicated with an air outlet of a fan on the water heater, and the air outlet is communicated with an air inlet of the combustor.
Further, the casing include barrel and disk seat, the one end of barrel be equipped with the air inlet, the other end can be dismantled with the disk seat and be connected, the gas outlet locate on the disk seat. The valve seat and the cylinder body can be in snap-fit connection or threaded connection or other detachable modes; the shell is divided into the valve seat and the cylinder body, so that the movable valve core is convenient to install, maintain and replace.
Furthermore, a limiting ring for limiting the guide rod to move back and forth along the guide hole is arranged on the guide rod, and the diameter value of the limiting ring is larger than the inner diameter value of the guide hole; the limiting ring is positioned on the guide rod between the movable valve core and the valve seat. The guide rod is provided with a limiting ring, so that on one hand, the spring is completely compressed after the movable valve core is prevented from being subjected to the blowing force of wind, and the movable valve core blocks the air outlet; on the other hand, the movable valve core can be prevented from being incapable of returning to the initial position due to the fact that the guide rod moves out of the guide hole.
Furthermore, the sectional area value of the movable valve core is larger than the air inlet sectional area value of the air inlet. The movable valve core is used for shielding the air inlet and preventing water vapor from flowing into the fan from the air inlet, and the sectional area of the movable valve core is properly larger than the air inlet sectional area of the air inlet, so that the water vapor can be better prevented from flowing into the fan from the air inlet.
Furthermore, the distance value from the side of the movable valve core, which is in contact with the air inlet, to the end part of the guide rod positioned at one end of the air outlet is larger than the distance value between the two guide holes. And the guide rod is prevented from moving out of the guide hole in the moving process of the movable valve core.
Furthermore, the distance value from the limiting ring to the end part of the guide rod at one end of the air inlet is larger than the distance value between the two guide holes. And the guide rod is prevented from moving out of the guide hole in the moving process of the movable valve core.
Furthermore, one surface of the joint of the movable valve core and the air inlet is of a convex spherical structure. The side of the movable valve core, which is contacted with the air inlet, is designed into a spherical structure, so that the wind resistance can be reduced, and the wind blown out by the fan can be conveniently and normally blown to the combustor.
The utility model also provides a burning water heater, including combustor assembly, gas valve, fan and controller, gas valve, fan all with controller electric connection, wherein, still include above the anti-backflow device, the air inlet of anti-backflow device and the air outlet intercommunication of fan, the air outlet of anti-backflow device and the air intake intercommunication of combustor.
Compared with the prior art, the beneficial effects are: the utility model provides a prevent flow reversal device and burning water heater thereof, fan blow open prevents flow reversal device during normal use, and movable valve element closes prevents flow reversal device under the spring action when the fan is closed, prevents that acid vapor from flowing backwards to the fan casing on, gas mixing arrangement etc. and producing and corrode, influences the product normal use, has effectively improved the life of water heater.
Drawings
Fig. 1 is the explosion schematic diagram of the structure of the backflow prevention device of the present invention.
Fig. 2 is a schematic sectional view of the backflow prevention device of the present invention when closed.
Fig. 3 is a schematic sectional view of the anti-back-sliding device of the present invention when opened.
Fig. 4 is an installation schematic diagram of the backflow prevention device in embodiment 3 of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
Example 1:
as shown in fig. 1 to 3, a backflow prevention device comprises a housing 1, a movable valve core 2, a guide rod 3 and a spring 4, wherein an air inlet 5 and an air outlet 6 are respectively arranged at two ends of the housing 1, the movable valve core 2 is sleeved on the guide rod 3, guide holes 7 corresponding to the guide rod 3 are respectively arranged at the air inlet 5 and the air outlet 6, and the guide rod 3 is arranged in the guide holes 7 in a penetrating manner and can move back and forth in the guide holes 7; the spring 4 is sleeved on the guide rod 3 and is positioned between the air outlet 6 and the movable valve core 2; when the movable valve core 2 is in an initial state, the movable valve core 2 is in sealing contact with the air inlet and is used for shielding the air inlet. The air inlet 5 is communicated with an air outlet of a fan on the water heater, and the air outlet 6 is communicated with an air inlet of the combustor. When in use, one end of the air inlet 5 is communicated with an air outlet of a fan of the water heater, and the air outlet 6 is communicated with an air inlet of the combustor; when the fan is in a stop state, the spring 4 is in a normal state, and at the moment, the movable valve core 2 is in sealing contact with the air inlet 5, or the spring 4 is in a compression state, and the movable valve core 2 is propped against the air inlet 5 by the elasticity of the spring 4 and is in sealing contact with the air inlet 5; the movable valve core 2 shields the air inlet 5, so that the water vapor generated from one end of the burner is shielded by the movable valve core 2 and cannot flow back to the fan, and the fan is prevented from being corroded by the water vapor; when the fan starts to operate, the movable valve element 2 is under the blowing force of wind and moves towards one end of the air outlet 6, at the moment, the spring 4 is compressed, the movable valve element 2 is separated from the air inlet 5, the wind blown out by the fan is blown into the shell 1 from the air inlet 5 and enters the combustor from the air outlet 6, and at the moment, as the wind is blown in continuously, water vapor cannot flow into the fan; through the utility model provides a prevent flow reversal device, fan blow-off prevents flow reversal device during normal use, and movable valve element 2 closes prevents flow reversal device under the effect of spring 4 when the fan is closed, prevents that acid vapor from flowing backwards and reachs production such as fan casing 1, gas mixing arrangement and corrode, influences product normal use.
In the embodiment, the simple, practical and low-cost structure of the spring is selected, so that the desired effect can be achieved, and the cost cannot be increased. Of course other resilient structures like springs are also possible. This embodiment is merely preferred.
In some embodiments, the housing 1 includes a barrel 11 and a valve seat 12, the barrel 11 has an air inlet 5 at one end and a detachable connection with the valve seat 12 at the other end, and the air outlet 6 is disposed on the valve seat 12. The valve seat 12 and the cylinder 11 can be in snap-fit connection or threaded connection, or other detachable modes; the shell 1 is divided into the valve seat 12 and the cylinder 11, so that the movable valve core 2 is convenient to mount, maintain and replace.
In some embodiments, a limiting ring 8 for limiting the guide rod 3 to move back and forth along the guide hole 7 is arranged on the guide rod 3, and the diameter value of the limiting ring 8 is larger than the inner diameter value of the guide hole 7; the limiting ring 8 is positioned on the guide rod 3 between the movable valve core 2 and the valve seat 12; wherein, the distance value from one side of the movable valve element 2, which is contacted with the air inlet 5, to the end part of the guide rod 3 positioned at one end of the air outlet 6 is larger than the distance value between the two guide holes 7; the distance value from the limiting ring 8 to the end part of the guide rod 3 positioned at one end of the air inlet 5 is larger than the distance value between the two guide holes 7, so that the guide rod 3 is prevented from moving out of the guide holes 7 in the moving process of the movable valve core 2. The guide rod 3 is provided with a limit ring 8, so that on one hand, the spring 4 is completely compressed after the movable valve core 2 is prevented from being subjected to the blowing force of wind, and the movable valve core 2 blocks the air outlet 6; on the other hand, the guide rod 3 can be prevented from moving out of the guide hole 7, and the movable valve element 2 cannot return to the initial position.
Specifically, the area value of the movable valve element 2 is larger than the intake area value of the intake port 5. The movable valve core 2 is used for shielding the air inlet 5 and preventing water vapor from flowing into the fan from the air inlet 5, and the area of the movable valve core 2 is properly larger than the air inlet area of the air inlet 5, so that the water vapor can be better prevented from flowing into the fan from the air inlet 5.
In some embodiments, the surface of the movable valve core 2 where it meets the air inlet 5 is a convex spherical structure. One side of the movable valve core 2, which is in contact with the air inlet 5, is designed to be of a spherical structure, so that the wind resistance can be reduced, and the wind blown out by the fan can be conveniently and normally blown to the combustor.
The working principle is as follows:
as shown in fig. 2, after the fan is closed, the movable valve core 2 is pushed to the air inlet 5 of the housing 1 under the action of the spring 4 and is connected with the air inlet 5, so as to close the channel from the burner to the fan, and prevent acidic water vapor from flowing back to the fan housing 1, a gas mixing device and the like to corrode, thereby affecting the normal use of the product; the distance value of the end part of the guide rod 3 positioned at one end of the air outlet 6 is larger than the distance value between the two guide holes 7, so that the movable valve core 2 is prevented from sliding out of the movable channel.
As shown in fig. 3, after the fan is opened, the movable valve element 2 is pushed towards the valve seat 12 under the action of the fan, the air inlet 5 of the burner is communicated with the air outlet of the fan, and the limiting ring 8 is arranged on the movable valve element 2, so that on one hand, after the movable valve element 2 is prevented from being subjected to the blowing force of wind, the spring 4 is completely compressed, and the movable valve element 2 blocks the air outlet 6; on the other hand, the guide rod 3 can be prevented from moving out of the guide hole 7, so that the movable valve core 2 cannot return to the initial position; the distance value from the limiting ring 8 to the end part of the guide rod 3 positioned at one end of the air inlet 5 is larger than the distance value between the two guide holes 7, so that the movable valve core 2 is prevented from sliding out of the movable channel.
Example 2
The embodiment provides a combustion water heater, including combustor assembly, gas valve, fan and controller, gas valve, fan all with controller electric connection, wherein, still include embodiment 1 and prevent the backflow device, as shown in fig. 2 and 3, prevent that backflow device's air inlet 5 and the air outlet of fan communicate, prevent that backflow device's gas outlet 6 and the air intake of combustor communicate.
Example 3
The embodiment provides a combustion water heater, which comprises a burner assembly, a gas valve, a fan and a controller, wherein the gas valve and the fan are electrically connected with the controller, and the combustion water heater further comprises a backflow prevention device in embodiment 1, as shown in fig. 4, an air outlet 6 of the backflow prevention device is communicated with an inlet of the fan, an air inlet 5 of the fan is an air inlet of the fan, after the fan is closed, a movable valve core 2 is pushed to the air inlet 5 of a shell 1 under the action of a spring 4 and is connected with the air inlet 5, a channel for leading air flow from the burner to the air inlet is closed, a channel for preventing acidic water vapor from flowing backwards is prevented, the fan shell 1, a gas mixing device and the like are prevented from being corroded, and normal use of a product; after the fan is opened, the movable valve core 2 is sucked to the valve seat 12 under the action of the fan, a channel from the air inlet to the combustor is opened, and due to the arrangement of the limiting ring 8, the movable valve core 2 cannot be in contact with the air outlet 6 to block the air outlet 6.
It should be noted that, the spring 4 is sleeved on the guide rod as the most preferable embodiment, because no positioning structure is needed to be arranged outside, the effective transmission of force can be completed, and the situation that the spring arranged beside is biased to one side for transmitting the acting force, which causes the movable valve core 2 to incline due to uneven stress is avoided, but if the effective contact area between the control spring 4 and the movable valve core 2 is arranged on the periphery, it is also possible that only a fixing structure needs to be additionally arranged. There are of course many other ways of setting, as well as ways of fixing or guiding. As long as the final effect of the present embodiment can be achieved, so that the movable valve element 2 can move up and down, the scheme of effectively controlling the air inlet 5 and the air outlet 6 is feasible.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The backflow prevention device is characterized by comprising a shell (1), a movable valve core (2), a guide rod (3) and a spring (4), wherein an air inlet (5) and an air outlet (6) are respectively arranged at two ends of the shell (1), the movable valve core (2) is sleeved on the guide rod (3) and fixedly connected with the guide rod (3), guide holes (7) corresponding to the guide rod (3) are respectively arranged at the air inlet (5) and the air outlet (6), and the guide rod (3) penetrates through the guide holes (7) and can move back and forth in the guide holes (7); the spring (4) is sleeved on the guide rod (3) and is positioned between the air outlet (6) and the movable valve core (2); and the movable valve core (2) is in sealing contact with the air inlet when in an initial state and is used for shielding the air inlet.
2. The backflow prevention device is characterized in that the air inlet (5) is communicated with an air outlet of a fan on the water heater, and the air outlet (6) is communicated with an air inlet of the combustor.
3. The backflow prevention device according to claim 1, wherein the housing (1) comprises a cylinder (11) and a valve seat (12), one end of the cylinder (11) is provided with the air inlet (5), the other end of the cylinder is detachably connected with the valve seat (12), and the air outlet (6) is arranged on the valve seat (12).
4. The backflow prevention device is characterized in that a limiting ring (8) used for limiting the guide rod (3) to move back and forth along the guide hole (7) is arranged on the guide rod (3), and the diameter value of the limiting ring (8) is larger than the inner diameter value of the guide hole (7); the limiting ring (8) is positioned on the guide rod (3) between the movable valve core (2) and the valve seat (12).
5. The backflow prevention device according to claim 4, wherein the cross-sectional area of the movable valve element (2) is larger than the intake cross-sectional area of the intake port (5).
6. The backflow prevention device according to claim 4, wherein the distance between the side of the movable valve element (2) contacting the air inlet (5) and the end of the guide rod (3) at the end of the air outlet (6) is greater than the distance between the two guide holes (7).
7. The backflow prevention device is characterized in that the distance between the limiting ring (8) and the end part of the guide rod (3) at one end of the air inlet (5) is larger than the distance between the two guide holes (7).
8. The backflow prevention device according to any one of claims 1 to 7, wherein a surface where the movable valve element (2) is connected with the air inlet (5) is of a convex spherical structure.
9. A combustion water heater comprises a burner assembly, a gas valve, a fan and a controller, wherein the gas valve and the fan are electrically connected with the controller, the combustion water heater is characterized by further comprising a backflow prevention device according to any one of claims 1 to 8, an air inlet (5) of the backflow prevention device is communicated with an air outlet of the fan, and an air outlet (6) of the backflow prevention device is communicated with an air inlet of the burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921487815.1U CN210800148U (en) | 2019-09-06 | 2019-09-06 | Backflow prevention device and combustion water heater thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921487815.1U CN210800148U (en) | 2019-09-06 | 2019-09-06 | Backflow prevention device and combustion water heater thereof |
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| Publication Number | Publication Date |
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| CN210800148U true CN210800148U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921487815.1U Active CN210800148U (en) | 2019-09-06 | 2019-09-06 | Backflow prevention device and combustion water heater thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012685A1 (en) * | 2020-07-16 | 2022-01-20 | 广东万和新电气股份有限公司 | Anti-backflow premixing device and fuel gas water heater |
| CN114343448A (en) * | 2021-12-02 | 2022-04-15 | 永康市东街五金机械有限公司 | Solid gas dual-fuel type smoke and smoke oven |
-
2019
- 2019-09-06 CN CN201921487815.1U patent/CN210800148U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022012685A1 (en) * | 2020-07-16 | 2022-01-20 | 广东万和新电气股份有限公司 | Anti-backflow premixing device and fuel gas water heater |
| CN114343448A (en) * | 2021-12-02 | 2022-04-15 | 永康市东街五金机械有限公司 | Solid gas dual-fuel type smoke and smoke oven |
| CN114343448B (en) * | 2021-12-02 | 2024-05-24 | 永康市东街五金机械有限公司 | Solid-gas dual-fuel type smoking oven |
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