Gas distribution chamber and stove comprising same
By improving the branch gas duct structure in the gas distribution chamber, the gas backflow converges and collides in the primary branch gas duct, solving the problems of backfire and reverse combustion in the stove and improving the safety and combustion efficiency of the gas distribution chamber.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-05-12
AI Technical Summary
Existing stoves have a backfire defect, where gas is retained or drawn back into the gas distribution chamber, leading to backfire and structural damage, as well as reduced combustion performance.
In the gas distribution chamber, the primary branch is changed to be connected to the first ring gas channel through at least two secondary branches. The gas channels of adjacent secondary branches extend in different directions so that they converge and collide in the primary branch, thereby reducing the velocity of the backflow and suppressing the backfire flame.
It reduces the possibility of backfire, avoids carbon buildup and structural damage inside the gas distribution chamber, and improves the safety and combustion efficiency of the gas distribution chamber.
Smart Images
Figure CN224230007U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of stoves, and in particular to a gas distribution chamber and a stove including the gas distribution chamber. Background Technology
[0002] like Figure 1 As shown, the stove is equipped with a mixing chamber 2' and a distribution chamber 1' for gas delivery and combustion preparation. The gas flows at high speed through the injector and is fully mixed with air in the mixing chamber 2'. It is then sequentially delivered to the main gas channel 11' and the second annular gas channel 12' of the distribution chamber 1'. Then, it is diverted through multiple radially distributed branch gas channels 13' to the first annular gas channel 15' on the periphery of the distribution chamber 1', and finally output to the burner hole 31' of the burner cap 3' to achieve combustion.
[0003] However, in the existing technology, the stove has the problem of backfire, that is: after the user closes the gas valve, the residual air-fuel mixture is retained or drawn back into the gas distribution chamber 1'. In the part near the burner cap 3', the residual gas may be re-ignited due to high temperature or residual flame; at the same time, the local low pressure area in the gas distribution chamber 1' causes a suction effect, causing the flame to backfire into the gas distribution chamber 1' or deeper into the structure, resulting in carbon accumulation and structural damage in the gas distribution chamber 1'.
[0004] To address the aforementioned issues, a smaller burner hole 31' can be installed at the outlet of the gas duct 13' corresponding to the burner cap 3' to increase resistance. When the valve is open, the resistance at the burner hole 31' can intercept the output airflow, making the output airflow speed more uniform inside the burner hole 31'. When the valve is suddenly closed, the resistance at the burner hole 31' can intercept backflow airflow and backfire flame, preventing backfire. Furthermore, when the valve is open, the resistance at the burner hole 31' can also intercept the output airflow, making the output airflow speed in the outer ring gas duct 15' uniform, improving cooking performance. However, reducing the size of the burner hole 31' can easily lead to clogging problems and may cause a decrease in combustion performance, thus affecting the overall performance of the stove. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the defect of backfire in existing stoves and to provide a gas distribution chamber and a stove including the gas distribution chamber.
[0006] The present invention solves the above-mentioned technical problems through the following technical solution:
[0007] A gas distribution chamber includes a first annular airway and a primary bronchial airway;
[0008] The gas distribution chamber further includes secondary branch channels, and each of the primary branch channels is connected to the first annular channel through at least two secondary branch channels;
[0009] The airway extension directions of adjacent secondary airways corresponding to the same primary airway are different.
[0010] In this technical solution, by providing this gas distribution chamber, the original branch duct (primary branch duct) is changed from being directly connected to the first annular gas duct to being connected to the first annular gas duct through at least two newly added branch ducts (secondary branch ducts). When the gas output stops, a suction effect is generated in the gas distribution chamber, and the air-fuel mixture in at least two secondary branch ducts forms a backflow, which is drawn into the primary branch duct. Due to the different extension directions of the gas ducts between adjacent secondary branch ducts, the backflows converge and collide with each other in the primary branch duct, reducing the speed of the backflow and suppressing backfire. The above configuration reduces the possibility of backfire, avoids the problem of backfire flames penetrating further and causing carbon buildup and structural damage inside the gas distribution chamber, improves the service life of the gas distribution chamber, and enhances the safety of the gas distribution chamber.
[0011] Preferably, the angle between the airway extension directions of two adjacent secondary airways corresponding to the same primary airway is less than or equal to 90°.
[0012] In this technical solution, the above-mentioned settings can create a vortex zone when the backflow air in the secondary branch duct collides with each other in the primary branch duct. In addition to the effect of the collision, the generation of the vortex further suppresses the backfire flame.
[0013] Preferably, the number of secondary bronchi connected to the same primary bronchi is two, and the two secondary bronchi are symmetrically distributed with the extension direction of the primary bronchi as the axis.
[0014] In this technical solution, the above-mentioned settings enable the airflow in the two secondary branches corresponding to the same primary branch to be evenly distributed, thereby further achieving circumferential uniform flow.
[0015] Preferably, all of the secondary bronchial channels are connected to different locations on the first annular airway.
[0016] In this technical solution, the above-mentioned settings achieve secondary diversion of the airflow in the first ring airway, which not only reduces the airflow velocity in the branch airway outlet area and narrows the velocity difference between the branch airway outlet area and the non-outlet area, but also allows for more airflow outlets to be set on the outer ring airway 15, shortening the distance the airflow travels from the outlet area to the non-outlet area, reducing losses, and improving the effect of circumferential uniform flow.
[0017] Preferably, all the secondary bronchial channels are circumferentially and uniformly connected to the first annular channel.
[0018] In this technical solution, the above settings can achieve uniform airflow delivery throughout the entire first annular air passage, thereby further achieving circumferential flow uniformity.
[0019] Preferably, the end of the secondary bronchus furthest from the primary bronchus has a long-angle end and a short-angle end, the long-angle end communicating with the outer periphery of the first annular airway, and the short-angle end communicating with the inner periphery of the first annular airway; and / or,
[0020] All of the primary bronchial channels are radially distributed along the gas distribution chamber in the projected direction; and / or,
[0021] The end of the same primary bronchus near the first annular airway connects to two corresponding secondary bronchus; and / or,
[0022] The number of primary bronchi is three, and the included angle between the extension directions of adjacent primary bronchi is 120°.
[0023] In this technical solution, the airflow distribution in the radial direction of the entire first annular airway can be further optimized through the above-described configuration. After the airflow from the first branch airway is split, it is directed from the short-angle end of the second branch airway to the inner part of the first annular airway, while simultaneously being directed from the long-angle end of the second branch airway to the outer part of the first annular airway. This allows for a more even distribution of airflow within the first annular airway, preventing excessive accumulation of airflow on one side.
[0024] By setting all primary air ducts to be radially distributed along the distribution chamber in the projection direction, the airflow can be uniformly diffused from the center of the distribution chamber to the first annular air duct.
[0025] By connecting two corresponding secondary bronchi to one end of the same primary bronchi near the first ring bronchi, the airflow path is optimized, reducing energy loss of airflow within the bronchi.
[0026] By setting three primary bronchial channels with an angle of 120° between the extension directions of adjacent primary bronchial channels, uniform airflow is achieved throughout the circumference of the first ring airway, further promoting circumferential flow uniformity.
[0027] Preferably, the gas distribution chamber further includes a main airway and a second annular airway, the main airway being connected to the second annular airway, and the ends of all the primary branch airways furthest from the first annular airway being connected to the second annular airway.
[0028] The outer diameter of the second annular airway is smaller than the inner diameter of the first annular airway.
[0029] In this technical solution, the airflow path can be further optimized by the above settings. The airflow in the main airway is pre-uniformed in the second ring airway to further achieve uniform airflow delivery in the entire first ring airway circumferential direction.
[0030] Preferably, the width of the second annular airway is greater than the width of the first annular airway.
[0031] In this technical solution, the above settings can make the volume ratio of the second annular airway and the first annular airway more reasonable, avoiding excessive differences in airflow velocity between the second annular airway and the first annular airway, which would cause significant energy loss.
[0032] A stove that includes a gas distribution chamber as described above.
[0033] In this technical solution, by providing this stove, the possibility of backfire in the gas distribution chamber is reduced, thereby improving the safety of the stove.
[0034] Preferably, the stove also includes a burner cap;
[0035] The flame cap includes an annular cap body, and the cap body and the first annular air passage are correspondingly arranged;
[0036] The flame cap also has flame holes of equal size, which are connected to the first annular gas passage and are evenly distributed on the cap body.
[0037] In this technical solution, the above-mentioned settings can prevent the burner holes from getting clogged, make the flame distribution of the stove more uniform, and ensure complete combustion, thereby further improving the combustion efficiency of the stove.
[0038] The positive and progressive effects of this utility model are as follows:
[0039] By providing this gas distribution chamber, the original branch duct (primary branch duct) is changed from being directly connected to the first annular gas duct to being connected to the first annular gas duct through at least two newly added branch ducts (secondary branch ducts). When the gas output stops, a suction effect occurs in the gas distribution chamber, and the air-fuel mixture in at least two secondary branch ducts forms a backflow, which is drawn into the primary branch duct. Due to the different extension directions of the gas ducts between adjacent secondary branch ducts, the backflows converge and collide with each other in the primary branch duct, reducing the speed of the backflow and suppressing backfire. The above configuration reduces the possibility of backfire, avoids the problem of backfire flames penetrating further and causing carbon buildup and structural damage inside the gas distribution chamber, improves the service life of the gas distribution chamber, and enhances its safety. Attached Figure Description
[0040] Figure 1 This is a schematic diagram of a stove in the background art.
[0041] Figure 2 This is a three-dimensional structural diagram (I) of the gas distribution chamber in Embodiment 1 of this utility model.
[0042] Figure 3 This is a schematic diagram (II) of the main view structure of the gas distribution chamber in Embodiment 1 of this utility model.
[0043] exist Figure 1 middle:
[0044] Gas distribution chamber 1'
[0045] Main airway 11'
[0046] Inner ring airway 12'
[0047] 13' of the bronchus
[0048] 15' outer ring airway
[0049] Mixing chamber 2'
[0050] Fire cap 3'
[0051] Fire hole 31'
[0052] exist Figure 2 , Figure 3 middle:
[0053] Gas distribution chamber 1
[0054] Second ring airway 12
[0055] Primary bronchus 13
[0056] Secondary bronchus 14
[0057] Long angle end 141
[0058] Short angle 142
[0059] Connection 143
[0060] First ring airway 15 Detailed Implementation
[0061] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.
[0062] Example 1
[0063] This embodiment provides a gas distribution chamber 1, which includes a first annular airway 15 and a primary bronchial airway 13.
[0064] The air distribution chamber 1 also includes secondary bronchial channels 14, and each primary bronchial channel 13 is connected to the first annular airway 15 through at least two secondary bronchial channels 14.
[0065] The airway extension directions B between adjacent secondary airways 14 connected by the same primary bronchus 13 are different.
[0066] By providing this gas distribution chamber 1, the original branch duct (primary branch duct 13) that was directly connected to the first annular gas duct 15 is now connected to the first annular gas duct 15 through at least two newly added branch ducts (secondary branch ducts 14). When the gas output stops, a suction effect occurs in the gas distribution chamber 1, and the air-fuel mixture in at least two secondary branch ducts 14 forms a backflow, which is drawn into the primary branch duct 13. Since the gas duct extension directions B between adjacent secondary branch ducts 14 are different, the backflow converges and collides with each other in the primary branch duct 13, reducing the speed of the backflow and suppressing the backfire flame. The above configuration reduces the possibility of backfire, avoids the problem of carbon buildup and structural damage inside the gas distribution chamber 1 caused by the backfire flame penetrating further, improves the service life of the gas distribution chamber 1, and enhances the safety of the gas distribution chamber 1.
[0067] In this embodiment, the included angle B of the airway extension directions of two adjacent secondary airways 14 connected to the same primary airway 13 is β, where β = 60°. This allows the recirculating airflow within the secondary airway 14 to form a vortex zone when it collides with each other within the primary airway 13. Besides the effect of the collision, the generation of the vortex further suppresses backfire. In other embodiments, the included angle B of the airway extension directions of two adjacent secondary airways 14 connected to the same primary airway 13 can also take other values within the range of 90° or less to achieve a similar effect.
[0068] In this embodiment, the number of secondary branches 14 connected to the same primary branch 13 is two. The two secondary branches 14 are symmetrically distributed with the extension direction A of the primary branch 13 as the axis, which enables the airflow in the two secondary branches 14 corresponding to the same primary branch 13 to be evenly distributed, thereby further achieving circumferential uniformity. Of course, in other embodiments, the number of secondary branches connected to the same primary branch 13 can also take other values.
[0069] In this embodiment, all secondary bronchial channels 14 are connected to different positions on the first annular channel 15 to achieve secondary diversion of the airflow in the first annular channel 15. This not only reduces the airflow velocity in the bronchial channel outlet area and narrows the velocity difference between the bronchial channel outlet area and the non-outlet area, but also allows for more airflow outlets to be set on the outer annular channel 15, shortening the distance the airflow travels from the outlet area to the non-outlet area, reducing losses, and improving the circumferential uniform flow effect.
[0070] In this embodiment, the end of the secondary branch 14 furthest from the primary branch 13 has a long-angle end 141 and a short-angle end 142. The long-angle end 141 connects to the outer periphery of the first annular airway 15, and the short-angle end 142 connects to the inner periphery of the first annular airway 15, to further optimize the radial airflow distribution of the entire first annular airway 15. After the airflow of the first branch is split, it is sent from the short-angle end 142 of the second branch to the inner part of the first annular airway 15, and from the long-angle end 141 of the second branch to the outer part of the first annular airway 15. In this way, the airflow on the inner and outer sides can be more evenly distributed in the first annular airway 15, avoiding excessive accumulation of airflow on one side. In other embodiments, the secondary branch can also directly connect to one side of the first annular airway, or connect to each side of the first annular airway separately.
[0071] In this embodiment, the connection 143 of the outer wall of the adjacent secondary branch air passage 14 is rounded to reduce flow resistance, improve airflow distribution, disperse the internal stress of the connection 143, and improve the service life of the air distribution chamber.
[0072] In this embodiment, all primary branch channels 13 are radially distributed along the air distribution chamber 1 in the projection direction, so that the airflow can diffuse evenly from the middle of the air distribution chamber 1 to the first annular air channel 15.
[0073] In this embodiment, the end of the same primary bronchus 13 near the first annular airway 15 connects to two secondary bronchus 14, optimizing the airflow path and reducing energy loss within the bronchus. In other embodiments, the primary bronchus may connect to the secondary bronchus at other locations.
[0074] In this embodiment, there are three primary airways 13. The included angle α of the airway extension direction A of adjacent primary airways 13 is 120°, so as to achieve uniform airflow delivery in the entire first ring airway 15 and further achieve circumferential flow uniformity.
[0075] In this embodiment, the gas distribution chamber 1 further includes a main air passage (not shown in the figure) and a second annular air passage 12. The outlet of the main air passage is connected to the second annular air passage 12, and the ends of all primary branch air passages 13 furthest from the first annular air passage 15 are connected to the second annular air passage 12. The outer diameter of the second annular air passage 12 is D2, and the inner diameter of the first annular air passage 15 is D1, where D2 < D1. This further optimizes the airflow path, allowing for pre-circumferential uniform flow of the airflow within the main air passage in the second annular air passage 12, thereby further achieving uniform airflow delivery throughout the entire first annular air passage 15. In other embodiments, the gas distribution chamber can be connected to the mixing chamber (not shown in the figure) using other structural forms found in the prior art.
[0076] In this embodiment, the width of the second annular airway 12 is d2, and the width of the first annular airway 15 is d1, where d2 > d1. This ensures that the volume ratio of the second annular airway 12 and the first annular airway 15 is reasonable, preventing excessive differences in airflow velocity between the two annular airways and avoiding significant energy loss. In other embodiments, the widths of the second and first annular airways can be set as needed and are not limited to the ranges described above.
[0077] This embodiment also provides a stove, which includes the gas distribution chamber 1 as described above. Because the gas output from the gas distribution chamber 1 is more uniform, the combustion efficiency of the stove can be improved. At the same time, the possibility of backfire within the gas distribution chamber 1 is reduced, enhancing the safety of the stove.
[0078] In this embodiment, the stove also includes a burner cap (not shown in the figure); the burner cap includes an annular cap body, and the cap body and the first annular gas passage 15 are correspondingly arranged; the burner cap also has flame holes of the same size, which are connected to the first annular gas passage 15 and are evenly distributed on the cap body, so that the flame holes are not easily blocked, and the flame distribution of the stove is more uniform and the combustion is more complete, further improving the combustion efficiency of the stove.
[0079] Example 2
[0080] This embodiment provides a gas distribution chamber, which has a structure that is roughly the same as the gas distribution chamber in Embodiment 1. The difference is that in this embodiment, all secondary branch air channels are circumferentially and uniformly connected to the first ring air channel, so that the airflow can be uniformly delivered in the circumference of the entire first ring air channel to further achieve circumferential uniform flow.
[0081] 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 gas distribution chamber, comprising a first annular airway and a primary bronchial airway, characterized in that: The gas distribution chamber further includes secondary branch channels, and each of the primary branch channels is connected to the first annular channel through at least two secondary branch channels; The airways of adjacent secondary airways connected by the same primary airway have different extension directions.
2. The gas distribution chamber as described in claim 1, characterized in that, The angle between the airway extension directions of two adjacent secondary airways connected to the same primary airway is less than or equal to 90°.
3. The gas distribution chamber as described in claim 1, characterized in that, The number of secondary bronchi connected to the same primary bronchi is two, and the two secondary bronchi are symmetrically distributed with the extension direction of the primary bronchi as the axis.
4. The gas distribution chamber as described in claim 1, characterized in that, All of the secondary bronchi are connected to different locations on the first annular airway.
5. The gas distribution chamber as described in claim 4, characterized in that, All of the secondary bronchi are circumferentially and uniformly connected to the first annular airway.
6. The gas distribution chamber as described in claim 1, characterized in that, The end of the secondary bronchus furthest from the primary bronchus has a long angle end and a short angle end. The long angle end is connected to the outer periphery of the first annular bronchus, and the short angle end is connected to the inner periphery of the first annular bronchus. And / or, All of the primary bronchial channels are radially distributed along the gas distribution chamber in the projected direction; and / or, The end of the same primary bronchus near the first annular airway connects to the secondary bronchus; and / or, The number of primary bronchi is three, and the included angle between the extension directions of adjacent primary bronchi is 120°.
7. The gas distribution chamber as described in claim 1, characterized in that, The gas distribution chamber further includes a second annular airway and a main airway. The main airway is connected to the second annular airway, and the ends of all the primary branch airways that are furthest from the first annular airway are connected to the second annular airway. The outer diameter of the second annular airway is smaller than the inner diameter of the first annular airway.
8. The gas distribution chamber as described in claim 7, characterized in that, The width of the second annular airway is greater than the width of the first annular airway.
9. A stove, characterized in that, It includes the gas distribution chamber as described in any one of claims 1-8.
10. The stove as described in claim 9, characterized in that, The stove also includes a burner cap; The flame cap includes an annular cap body, and the cap body and the first annular air passage are correspondingly arranged; The flame cap also has flame holes of equal size, which are connected to the first annular gas passage and are evenly distributed on the cap body.