Flow guide cover, smoke pipe assembly and gas water heating device
By using a flow guide hood to change the exhaust direction and setting up a pressure relief hole in the exhaust system, the problem of condensation and ice formation at the exhaust port is solved, improving the safety and reliability of the gas water heater.
Patent Information
- Application Number
- CN202422930627.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing gas water heaters and wall-hung boilers are prone to air intake blockage in cold weather due to condensation or ice buildup near the exhaust vents, which can affect equipment operation and pose safety hazards.
The design of the flow guide shroud changes the direction of the exhaust port of the exhaust inner pipe from radial to axial. The gas flow is guided by the mounting part of the flow guide shroud and the gradually increasing inner diameter structure of the shroud body. Combined with the design of the pressure relief through hole, the gas condensation or icing is prevented.
This effectively prevents condensation or icing near the exhaust port, improves the safety and reliability of the flue, ensures that the air inlet is not blocked, and enhances the stability and safety of the equipment.
Smart Images
Figure CN223579935U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of smoke exhaust device, in particular to a fairing, a smoke pipe assembly and a gas water heater. BACKGROUND
[0002] For gas water heater and gas water heating products such as wall-hanging stove, the smoke exhaust device thereof is generally a coaxial smoke pipe. The coaxial smoke pipe comprises a concentrically arranged exhaust inner pipe and an intake outer pipe, and exhaust holes are generally arranged on the pipe wall of the exhaust inner pipe in the circumferential direction. Thus, the exhaust direction of the smoke pipe is generally the radial direction.
[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and thus can include information that does not constitute prior art known by those skilled in the art. CONTENT OF THE UTILITY MODEL
[0004] According to different aspects, one of the purposes of the present application is to avoid the condensation frost or ice hanging phenomenon caused by the exhaust gas near the smoke pipe intake hole.
[0005] In addition, the present application also aims to solve or alleviate other technical problems existing in the prior art.
[0006] The present application provides a fairing, a smoke pipe assembly and a gas water heater. Specifically, according to an aspect of the present application, there is provided:
[0007] A fairing for a smoke pipe having a nested arrangement of an intake outer pipe and an exhaust inner pipe, the fairing having a mounting portion and a main body connected to the mounting portion in its axial direction, the mounting portion being configured as an annulus, and the inner diameter of the main body gradually increasing from the mounting portion in the axial direction.
[0008] Optionally, according to an embodiment of the present application, the main body is provided in a bowl shape, and the inner wall of the main body is provided in a streamline shape.
[0009] Optionally, according to an embodiment of the present application, a through hole is provided on the wall of the main body.
[0010] Optionally, according to an embodiment of the present application, an inwardly recessed drainage wall is provided on the inner wall of the main body, the through hole being formed between the drainage wall and the inner wall of the main body, the drainage wall having a drainage surface that gradually inclines inwardly in the direction from the mounting portion to the main body.
[0011] Optionally, according to an embodiment of the application, a threaded mounting hole is arranged on the mounting portion, and / or an annular protrusion is arranged on the mounting portion, and an annular groove is arranged in the annular protrusion, and / or a clamping member is arranged on the mounting portion.
[0012] According to another aspect of the application, the application provides a smoke pipe assembly, which comprises a smoke pipe and the above-mentioned fairing,
[0013] The smoke pipe comprises an exhaust inner pipe and an air inlet outer pipe surrounding the exhaust inner pipe, the exhaust inner pipe comprises a pipe body arranged inside the air inlet outer pipe and an exhaust end pipe connected with the pipe body, a sealing cover is arranged at one end of the air inlet outer pipe, the exhaust end pipe protrudes from the sealing cover beyond the air inlet outer pipe, air inlet holes are arranged on the pipe wall of the air inlet outer pipe, and exhaust holes are arranged on the pipe wall of the exhaust end pipe;
[0014] The fairing is arranged to surround the exhaust end pipe, and the fairing body surrounds the exhaust holes.
[0015] Optionally, according to an embodiment of another aspect of the application, the exhaust end pipe is integrally formed with the pipe body, a hole is arranged on the sealing cover, the exhaust end pipe protrudes from the hole beyond the air inlet outer pipe, and the fairing is mounted on the exhaust end pipe through the mounting portion.
[0016] Optionally, according to an embodiment of another aspect of the application, the exhaust end pipe is integrally formed with the sealing cover and the fairing.
[0017] Optionally, according to an embodiment of another aspect of the application, the maximum outer diameter of the fairing body is less than or equal to the outer diameter of the air inlet outer pipe.
[0018] According to still another aspect of the application, the application provides a gas water heater, which comprises the above-mentioned smoke pipe assembly.
[0019] The benefits of the application include:
[0020] 1. The fairing of the application can be mounted at the exhaust inner pipe end of the smoke pipe, and the gas flow direction discharged from the exhaust holes of the exhaust inner pipe is guided by the fairing, so that the exhaust direction is guided from the radial direction to the axial direction, avoiding the condensation or icing of the gas discharged from the exhaust inner pipe at the air inlet hole of the smoke pipe due to the interference of external air pressure changes or wind blowing in severe cold weather, and improving the safety of the smoke pipe.
[0021] 2. The fairing of the application is convenient to install, which can be mounted on the exhaust inner pipe through bolts, can be clamped on the sealing cover through the groove or the clamping member, or can be integrally formed with the sealing cover.
[0022] 3. The deflector in this application is also provided with a pressure relief hole to prevent the discharged gas from accumulating in the deflector due to air pressure or opposing airflow, which helps the gas to be discharged better. Attached Figure Description
[0023] Referring to the accompanying drawings, the above and other features of this application will become apparent, wherein,
[0024] Figure 1 A schematic diagram of a known flue pipe is shown;
[0025] Figure 2 A schematic diagram of the structure of a fairing according to one embodiment of this application is shown;
[0026] Figure 3 A schematic diagram of the structure of a fairing according to another embodiment of this application is shown;
[0027] Figure 4 A schematic diagram of the structure of a flue assembly according to another embodiment of this application is shown. Detailed Implementation
[0028] It is readily understood that, based on the technical solution of this application, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this application. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this application and should not be considered as the entirety of this application or as limitations or restrictions on the technical solution of this application.
[0029] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. These are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive. Furthermore, the terms "first," "second," "third," and similar expressions are used for descriptive and distinguishing purposes only and should not be construed as indicating or implying the relative importance of the corresponding components or the order of components or assembly sequence.
[0030] refer to Figure 1 It shows a schematic diagram of a known smoke pipe 100. Figure 1The smoke pipe 100 in the prior art is usually used as an outdoor smoke exhaust device for a gas water heater or a wall-hanging stove, etc. The smoke pipe 100 has an air inlet outer pipe 110 and an air outlet inner pipe 120 arranged in a nested manner, especially in a concentric manner. The air inlet outer pipe 110 is arranged around the air outlet inner pipe 120. The air inlet outer pipe 110 is provided with a sealing cover 130 at one end. The air outlet inner pipe 120 has a pipe body (not shown in the figure) arranged inside the air inlet outer pipe 110 and an air outlet end pipe 121 in communication with the pipe body.
[0031] In the embodiment of the prior art, Figure 1 The air outlet end pipe 121 is integrally formed with the pipe body to form the air outlet inner pipe 120. The sealing cover 130 is provided with a hole 131 through which the air outlet end pipe 121 protrudes beyond the air inlet outer pipe 110. The air outlet holes 122 are arranged on the pipe wall at the air outlet end pipe 121 in the circumferential direction. The air outlet holes 122 are especially uniformly arranged in the circumferential direction. Therefore, when the air outlet inner pipe 120 exhausts, the gas is discharged outward in the radial direction through the air outlet holes 122. The air inlet holes 111 of the air inlet outer pipe 110 are arranged on the pipe wall of the air inlet outer pipe 110, that is, the air inlet outer pipe 110 actually uses the annular space between the air inlet outer pipe 110 and the air outlet inner pipe 120 as an air inlet passage. The smoke pipe 100 is usually exposed to the outdoor environment from the indoor water heating device, and the exhaust gas usually contains a large amount of water vapor. Therefore, in cold weather, the water vapor in the flue gas will condense or freeze. For the gas discharged through the air outlet holes 122, if it is disturbed by the change of external air pressure and wind, it is easy to move to the vicinity of the air inlet holes 111 and condense or freeze in the vicinity of the air inlet holes 111, which may block the air inlet holes 111 and affect the operation of the equipment. The ice column formed by freezing may also cause certain safety hazards.
[0032] In another known embodiment of the smoke pipe, the air outlet end pipe 121 is a separate component from the pipe body, and the air outlet end pipe 121 is integrally formed with the sealing cover 130. When the sealing cover 130 is installed on the air inlet outer pipe 110, the air outlet end pipe 121 is in communication with the pipe body to form the air outlet inner pipe 120 corresponding to Figure 1 the embodiment of the prior art.
[0033] The present application provides a flow guide cover to solve the above problems. Referring to Figure 2Fig. 2 shows a schematic view of a flow guide 200 according to an embodiment of the present application. The flow guide 200 can be used in both of the above-mentioned smoke pipes, and has a mounting portion 210 configured in a ring shape and a cover body 220 connected to the mounting portion 210, the inner diameter of the cover body 220 gradually increases in the axial direction from the mounting portion 210. When the flow guide 200 is fitted to the end of the exhaust inner pipe 120, the cover body 220 covers the exhaust hole 122, preventing the gas discharged from the exhaust hole 122 from moving towards the air inlet hole 111. When the gas flows onto the cover body 220, since the cover body 220 has an inner diameter gradually increasing in the axial direction from the mounting portion 210, that is, the cover body 220 is open towards the air inlet inner pipe 110, the gas is guided to move away from the air inlet inner pipe 110, thereby preventing the gas from flowing to the air inlet hole 111 and condensing or freezing at the air inlet hole 111.
[0034] In Figure 2 In the embodiment shown in Fig. 2, the cover body 220 is configured in a bowl shape, and the inner wall of the cover body 220 is configured in a streamline shape. The shape of the cover body 220 can better guide the gas, so that the originally radially discharged gas gradually changes to be axially discharged.
[0035] It should be understood that the inner wall of the cover body 220 can also be configured in a straight line shape, in which case the cover body 220 as a whole has a funnel shape. In an embodiment not shown, the inner wall of the cover body 220 can also be configured in a stepped shape or other shapes according to the needs of the flow direction, which should also be included in the protection scope of the present application.
[0036] Referring to Figure 3 Fig. 3 shows a schematic view of a flow guide 300 according to another embodiment of the present application. In this embodiment, a through hole 321 is provided on the wall of the cover body 320. For the flow guide 300, since it faces a specific direction, if there is a convection current or a change in air pressure in this direction, it can cause the gas to accumulate in the flow guide 300 or to be discharged slowly. By providing the through hole 321, it plays a role of pressure relief, so that the convection current can flow out through the through hole 321, which can advantageously promote the outflow of the gas from the flow guide 300.
[0037] In Figure 3In an embodiment of the application, a draft wall 322 is provided on the inner wall of the cover body 320, the through hole 321 is formed between the draft wall 322 and the inner wall of the cover body 320, the draft wall 322 has a draft surface 323, the draft surface 323 gradually inclines inwardly along the axial direction from the mounting portion 310 to the cover body 320. While the through hole 321 is provided on the cover body 320, a part of the gas can also directly escape through the through hole 321 without being guided by the draft cone 300. By providing the draft wall 322, the gas discharged from the exhaust hole 122 will not directly flow into the through hole 321, but will first change direction by the draft of the draft surface 323. Due to the gradual inward inclination of the draft surface 323 along the gas flow direction, the gas is guided to flow in the axial direction or at least not move towards the through hole 321 before reaching the through hole 321, reducing the amount of gas escaping from the through hole 321.
[0038] It can be seen from Figure 2 and 3 that the mounting portion 210, 310 of the draft cone 200, 300 is provided with threaded mounting holes 211, 311, especially two opposite threaded mounting holes, for mounting the draft cone 200, 300 to the smoke pipe 100.
[0039] In an embodiment not shown, an annular protrusion is provided on the mounting portion 210, 310, and an annular groove is provided in the annular protrusion for mounting to the smoke pipe 100. In another embodiment not shown, a clamping member is provided on the mounting portion 210, 310 for clamping to the smoke pipe 100.
[0040] In an embodiment of the application, the draft cone 200, 300 can be made of metal, plastic or rubber, preferably made of aluminum alloy.
[0041] Another aspect of the application proposes a smoke pipe assembly 10, referring to Figure 4 which shows a structural schematic diagram of a smoke pipe assembly 10 according to an embodiment of another aspect of the application. The smoke pipe assembly 10 comprises a smoke pipe 100 and a draft cone 200, the smoke pipe 100 comprises an exhaust inner pipe 120 and an intake outer pipe 110 surrounding the exhaust inner pipe 120, the exhaust inner pipe 120 comprises a pipe body arranged inside the intake outer pipe 110 and an exhaust end pipe 121 in communication with the pipe body, a sealing cover 130 is provided at one end of the intake outer pipe 110, the exhaust end pipe 121 protrudes from the sealing cover 130 beyond the intake outer pipe 110, an intake hole 111 is provided on the pipe wall of the intake outer pipe 110, and an exhaust hole 122 is provided on the pipe wall of the exhaust end pipe 121.
[0042] In Figure 4In an embodiment of the application, the shroud 200 is arranged around the exhaust stub 121, in particular fixed to the wall of the exhaust end pipe 121 by means of its mounting portion 210, and the shroud body 220 is arranged around the exhaust openings 122. Preferably, the shroud body 220 completely covers all exhaust openings 122 in a circumferential direction in a surrounding manner, so that all gases emitted by the exhaust openings 122 can flow onto the shroud body 220 and change the flow direction via the shroud body 220.
[0043] In an embodiment of the other aspect of the application, the maximum outer diameter of the shroud body 220 is equal to or smaller than the outer diameter of the intake outer pipe 110, which facilitates the manufacture and installation of the shroud 200.
[0044] In an embodiment of the other aspect of the application, threaded mounting holes 211, 311 are provided on the mounting portions 210, 310, and the shroud 200 is mounted on the exhaust end pipe 121 by means of bolts via the threaded mounting holes 211, 311.
[0045] In an embodiment not shown, an annular protrusion is provided on the mounting portion 210, 310, in which an annular recess is provided, and the shroud 200, 300 is clamped onto the edge of the hole 131 via the annular recess, whereby the shroud 200, 300 is fixed to the exhaust inner pipe 120. Furthermore, a clamping element can also be provided on the mounting portion 210, which can be clamped onto the exhaust inner pipe 120 or onto the sealing cap 130 in order to perform a fixing function.
[0046] In the case that the exhaust end pipe 121 is integrally formed with the pipe body, the shroud 200, 300 can be fixed to the exhaust end pipe 121 by means of the mounting portion 210, 310, in particular by means of bolts, in which case the shroud 200, 300 only has to be mounted directly by means of bolts on the exhaust end pipe 121 of the known flue pipe 100. In another embodiment, the shroud 200, 300 can also be integrally formed with the sealing cap 130, in which case the shroud 200, 300 is also positioned accordingly when the sealing cap 130 is installed, without the need for a further installation step.
[0047] In case the exhaust end pipe 121 is a separate component from the pipe body, the exhaust end pipe 121 is generally integrally formed with the sealing cap 130. The shroud 200, 300 can be directly fixed to the exhaust end pipe 121 by means of the mounting portion 210, 310, in particular by means of bolts, in which case only the shroud 200, 300 has to be directly bolted to the exhaust end pipe 121 of the known chimney 100. In another embodiment, the shroud 200, 300 can also be integrally formed with the sealing cap 130 and the exhaust end pipe 121 as one exhaust device which can be used for direct mounting to a chimney having a concentrically arranged intake outer pipe 110 and pipe body without the need for a prior mounting of the exhaust end pipe 121.
[0048] Still another aspect of the present application proposes a gas water heating device comprising the chimney assembly 10 as described above.
[0049] The gas water heating device has all the advantageous technical effects of the chimney assembly as described above, which are not repeated here.
[0050] It should be understood that all the above preferred embodiments are exemplary and not restrictive, and various modifications or variations of the specific embodiments described above made by those skilled in the art under the concept of the present application shall be within the legal protection scope of the present application.
Claims
1. A fairing, characterized in that, For a flue with nested intake outer pipe and exhaust inner pipe, the shroud has a mounting portion and a shroud body connected to the mounting portion along its axial direction, the mounting portion being constructed in an annular shape, and the inner diameter of the shroud body gradually increasing from the mounting portion along the axial direction.
2. The flow guide according to claim 1, characterized in that, The main body of the cover is shaped like a bowl, and the inner wall of the main body of the cover is streamlined.
3. The flow guide according to claim 2, characterized in that, Through holes are provided on the wall of the main body of the cover.
4. The flow guide according to claim 3, characterized in that, A recessed drainage wall is provided on the inner wall of the cover body, and the through hole is formed between the drainage wall and the inner wall of the cover body. The drainage wall has a drainage surface, which gradually slopes inward along the direction from the mounting part to the cover body.
5. The flow guide according to claim 1, characterized in that, The mounting portion is provided with a threaded mounting hole, and / or the mounting portion is provided with an annular protrusion, the annular protrusion being provided with an annular groove, and / or the mounting portion is provided with a snap-fit element.
6. A flue assembly, characterized in that, The smoke pipe assembly includes a smoke pipe and a flow guide according to any one of claims 1 to 5. The flue includes an inner exhaust pipe and an outer intake pipe surrounding the inner exhaust pipe. The inner exhaust pipe includes a pipe body arranged inside the outer intake pipe and an exhaust end pipe connected to the pipe body. A sealing cap is provided at one end of the outer intake pipe. The exhaust end pipe protrudes beyond the outer intake pipe from the sealing cap. An intake hole is provided on the pipe wall of the outer intake pipe, and an exhaust hole is provided on the pipe wall of the exhaust end pipe. The shroud is configured to surround the exhaust end pipe, and the shroud body surrounds the exhaust port.
7. The flue assembly according to claim 6, characterized in that, The exhaust pipe is integrally formed with the pipe body, and a hole is provided on the sealing cover. The exhaust pipe protrudes beyond the intake pipe through the hole, and the guide shroud is installed on the exhaust pipe through the mounting part.
8. The flue assembly according to claim 6, characterized in that, The exhaust pipe is integrally formed with the sealing cap and the flow guide.
9. The flue assembly according to claim 6, characterized in that, The maximum outer diameter of the main body of the cover is less than or equal to the outer diameter of the air intake pipe.
10. A gas-fired hot water device, characterized in that, The gas-fired water heater includes a flue assembly according to any one of claims 6 to 9.