Modular updraft range
By using a modular top-intake stove with a plug-in sealing unit and an embedded O-ring structure, the problem of insufficient sealing of the stove's gas valve is solved, achieving higher sealing performance and flexible installation adaptability.
Patent Information
- Application Number
- CN202511083209.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2045-08-04
AI Technical Summary
The existing gas valve and burner assembly of stoves are prone to insufficient sealing during assembly, which can lead to gas leakage and affect gas output.
The stove adopts a modular top-intake design. The first and second gas pipes are connected to the first and second connecting pipes respectively through a plug-in sealing unit. The embedded pipe head and O-ring are used for sealing. Combined with hose clamps and limiting structures, the sealing performance and installation flexibility are improved.
It effectively eliminates cross-contamination between pipes, improves sealing and ease of assembly, and allows for more flexible installation, adapting to different burner installation locations.
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Figure CN120627080B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of burners, in particular, a modular top air inlet stove. BACKGROUND
[0002] The current prior art, such as a stove gas valve and burner assembly disclosed in Chinese patent document CN218154339U, in combination with the specification and the specification drawings, it can be known that a gas outlet flange is provided with a gas guide counterbore, the gas guide counterbore has a certain length, one end of the gas guide counterbore is in communication with the center gas guide pipe; further comprising an air inlet sealing gasket, the air inlet sealing gasket is provided with a long strip-shaped center gas guide hole and an outer ring gas guide hole; the air inlet sealing gasket is arranged between the gas outlet flange and the air inlet seat, the gas guide counterbore and the long strip-shaped center gas guide hole are opposite, the gas guide counterbore is in communication with the center air inlet hole of the air inlet seat, the outer ring gas guide hole is in communication with the outer ring air inlet hole of the air inlet seat; the end face of the air outlet end of the air inlet sealing gasket is provided with a long strip-shaped annular protrusion around the long strip-shaped center gas guide hole and a circular annular protrusion around the outer ring gas guide hole. The long strip-shaped annular protrusion and the outer ring gas guide hole are attached to the air inlet seat.
[0003] However, in the above structure, since the air inlet sealing gasket, the gas outlet flange and the air inlet seat all have a certain length, after the gas outlet flange and the air inlet seat are locked by screws during assembly, the circular annular protrusion and the long strip-shaped annular protrusion on the air inlet sealing gasket are prone to be uneven during extrusion, thereby causing insufficient sealing and also causing the two gas guide holes to have a gas leakage phenomenon, so that the gas output by the corresponding fire ring of the burner is insufficient. SUMMARY
[0004] In order to overcome the defects existing in the prior art, the present application provides a modular top air inlet stove to solve the problems in the prior art.
[0005] The technical scheme adopted by the present application to solve its technical problems is: a modular top air inlet stove, comprising: a stove body and a burner base assembly, a gas pipe connecting seat is arranged in the stove body, two valve seats are respectively communicated at both ends of the gas pipe connecting seat, valve seat connecting pipe portions are respectively arranged and communicated at the output ends of the valve seats, the valve seat connecting pipe portions are provided with a first connecting pipe and a second connecting pipe, the burner base assembly comprises a first gas pipe, a second gas pipe and a base, two nozzle seats are arranged on one side of the base, nozzles are arranged and communicated on the nozzle seats, one end of the first gas pipe and the second gas pipe is correspondingly communicated to the two nozzle seats, the other end of the first gas pipe and the second gas pipe is respectively and separably communicated to the first connecting pipe and the second connecting pipe through a plug-in sealing unit, and a fire divider is installed on the base.
[0006] The beneficial effects of the present application are that the first connecting pipe and the first gas pipe, the second connecting pipe and the second gas pipe are respectively plugged and communicated with each other through the plug sealing unit, even if a sealing ring is used, a protrusion does not need to be arranged, the phenomenon of mutual gas leakage between the two pipes due to insufficient sealing is eliminated, the sealing performance is effectively improved, and the assembly requirement is relatively simpler than the prior art, and the assembly is more convenient.
[0007] Further, the outer walls of the first gas pipe and the second gas pipe are connected through the reinforcing block, so that the first gas pipe and the second gas pipe swing an angle on the first connecting pipe and the second connecting pipe synchronously through the plug sealing unit.
[0008] After the above further structure is adopted, the first gas pipe and the second gas pipe can swing an angle, so that the burner base assembly can be installed in different cookers, and can be more adaptable to the installation positions of different burners, and the installation is more flexible.
[0009] Further, the plug sealing unit comprises a cylindrical embedded pipe head, the embedded pipe head is arranged on the end face of the output end of the first connecting pipe and the second connecting pipe, one end of the first gas pipe and the second gas pipe close to the valve seat connecting pipe part is provided with an embedded pipe sleeve, an embedded groove is formed in the end face of the embedded pipe sleeve, an O-ring is installed in the embedded groove, and the embedded pipe head is plugged into the embedded groove, so that the end face of the embedded pipe head abuts on the O-ring.
[0010] After the above further structure is adopted, the first connecting pipe and the second connecting pipe can be positioned and plugged into the embedded pipe sleeve of the corresponding first gas pipe and second gas pipe through the cylindrical embedded pipe head, so that the embedded pipe head is sealed by the O-ring to prevent gas leakage, and the assembly is simpler.
[0011] Further, one end of the first connecting pipe and the second connecting pipe close to the embedded pipe head is connected through a first connecting rod, one end of the first gas pipe and the second gas pipe close to the embedded pipe sleeve is connected through a second connecting rod, a first semicircular groove is arranged on the side of the first connecting rod away from the second connecting rod, a second semicircular groove is arranged on the side of the second connecting rod away from the first connecting rod, the first semicircular groove and the second semicircular groove are left-right symmetrical, and the first semicircular groove and the second semicircular groove are connected through a grommet, so that the end face of the embedded pipe head abuts on the O-ring in the embedded groove.
[0012] After the above further structure is adopted, the grommet is clamped in the first semicircular groove and the second semicircular groove, and then the grommet is locked, so that the first connecting pipe and the second connecting pipe abut on each other, thereby making the embedded pipe head tightly plugged into the embedded pipe sleeve to prevent loosening and improve the sealing performance.
[0013] Further, the first connecting rod is provided with at least two limiting protrusions on the side facing the second connecting rod, and the side of the second connecting rod facing the first connecting rod is a plane.
[0014] After the above further structure, after the locking of the throat clamp, until the limiting protrusions are pressed against the plane of the second connecting rod, the damage of the O-shaped ring caused by excessive extrusion of the embedded pipe head is prevented, the service life of the O-shaped ring is improved, and the sealing performance is ensured.
[0015] Further, the plug-in sealing unit comprises a ball-shaped embedded ball head, the embedded ball head is arranged on the end face of the output end of the first connecting pipe and the second connecting pipe, a spherical groove is formed in the end face of the first gas pipe and the second gas pipe close to the embedded ball head, a gas port is formed in the end of the embedded ball head facing the spherical groove, a conical gasket is installed in the spherical groove, and the embedded ball head is embedded and installed in the spherical groove, so that the end of the embedded ball head close to the gas port abuts against the conical gasket.
[0016] After the above further structure, the ball-shaped embedded ball head is embedded in the spherical groove, so that the first gas pipe and the second gas pipe can swing in up, down, left and right directions by a certain angle under the cooperation of the embedded ball head and the spherical groove, the position of the entire burner base assembly is changed, different installation positions can be more adapted, and installation is more flexible; the conical gasket can more effectively cover the gas port around the embedded ball head or cover part of the gas port after swinging, gas leakage is prevented, and the sealing performance is better.
[0017] Further, a sealing ring groove is formed in the ball of the embedded ball head, and a sealing ring is installed in the sealing ring groove.
[0018] After the above further structure, the sealing ring on the embedded ball head is in contact with the inner wall of the spherical groove, which can further improve the sealing performance.
[0019] Further, the first connecting pipe and the second connecting pipe are connected by a first connecting rod through a rotating shaft at the end close to the embedded ball head, the first gas pipe and the second gas pipe are connected by a second connecting rod through a rotating shaft at the end close to the embedded ball head, a first semicircular groove is arranged on the side of the first connecting rod away from the second connecting rod, a second semicircular groove is arranged on the side of the second connecting rod away from the first connecting rod, the first semicircular groove and the second semicircular groove are left-right symmetrical, and the first semicircular groove and the second semicircular groove are connected by a throat clamp, so that the first connecting rod and the second connecting rod are in contact with each other and rotate synchronously.
[0020] After the further structure is used, the throat clamp can be stably clamped in the first semicircular groove and the second semicircular groove, and after the throat clamp is locked, the embedded ball head is stably embedded in the spherical groove and is in contact with the conical gasket, so that the sealing is better, and even if the first connecting rod and the second connecting rod are in contact with each other after the swinging angle, the first connecting rod and the second connecting rod can be tightly contacted, and the top pressure between the first connecting rod and the second connecting rod caused by the angle difference is prevented.
[0021] Further, the spherical groove is provided with a limiting ring close to the inner wall edge of the slot, and the side of the limiting ring towards the slot is provided with a slope.
[0022] After the further structure is used, in the process that the embedded ball head is positioned and inserted into the spherical groove, the sealing ring can be better pressed into the spherical groove under the action of the slope due to the protrusion of the surface of the embedded ball head, and the sealing ring is prevented from being separated from the spherical groove during the swinging angle. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the modular upper air inlet range of the embodiment one of the application.
[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the modular upper air inlet range of the embodiment one of the application.
[0025] Figure 3 It is a schematic diagram of the three-dimensional structure of the valve seat connecting pipe part, the burner base assembly and the plug-in sealing unit of the embodiment one of the application.
[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the valve seat connecting pipe part of the embodiment one of the application.
[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the burner base assembly of the embodiment one of the application.
[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the valve seat connecting pipe part of the embodiment two of the application.
[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the burner base assembly of the embodiment two of the application.
[0030] Figure 8 It is a schematic diagram of the sectional structure of the embedded ball head and the spherical groove of the embodiment two of the application.
[0031] The figure: the stove body 1, the gas pipe connecting seat 2, the valve seat 3, the valve seat connecting pipe part 4, the base 5, the fire divider 6, the burner base assembly 7, the plug-in sealing unit 8, the first connecting pipe 9, the second connecting pipe 10, the first gas pipe 11, the second gas pipe 12, the embedded pipe head 13, the first connecting rod 14, the first semicircular groove 15, the limiting convex rib 16, the embedded pipe sleeve 17, the embedded groove 18, the O-ring 19, the second connecting rod 20, the second semicircular groove 21, the embedded ball head 22, the sealing ring 23, the spherical groove 24, the conical washer 25, the limiting ring 26, the inclined surface 27. DETAILED DESCRIPTION
[0032] The specific embodiments of the present application will be further described below with reference to the drawings. It should be noted that the description of these embodiments is used to help understand the present application, but does not constitute a limitation on the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.
[0033] Example one
[0034] Combination Figures 1 to 5 A modular top air inlet stove is shown, comprising: a stove body 1 and a burner base assembly 7, the stove body 1 is provided with a gas pipe connecting seat 2, both ends of the gas pipe connecting seat 2 are respectively communicated with a valve seat 3, the output end of the valve seat 3 is respectively communicated with a valve seat connecting pipe part 4, the valve seat connecting pipe part 4 is provided with a first connecting pipe 9 and a second connecting pipe 10, the burner base assembly 7 comprises a first gas pipe 11, a second gas pipe 12 and a base 5, one side of the base 5 is provided with two nozzle seats 28, a nozzle 29 is communicated and arranged on the nozzle seat 28, one end of the first gas pipe 11 and the second gas pipe 12 is communicated with the two nozzle seats 28 correspondingly, the other end of the first gas pipe 11 and the second gas pipe 12 is respectively and separably communicated with the first connecting pipe 9 and the second connecting pipe 10 through the plug-in sealing unit 8, and the base 5 is installed with a fire divider 6; In this embodiment, the first connecting pipe 9 and the first gas pipe 11, the second connecting pipe 10 and the second gas pipe 12 are respectively and mutually plugged and communicated through the plug-in sealing unit 8, even if a sealing ring is used, a protrusion does not need to be arranged, the phenomenon of mutual gas leakage between the two pipes due to insufficient sealing is eliminated, the sealing performance is effectively improved, and the assembly requirement is relatively simpler and more convenient than the prior art.
[0035] Specifically, the plug-in sealing unit 8 of the embodiment includes cylindrical embedded pipe heads 13, which are arranged on the end faces of the output ends of the first connecting pipe 9 and the second connecting pipe 10, and the first gas pipe 11 and the second gas pipe 12 are provided with embedded pipe sleeves 17 at one end close to the valve seat connecting pipe part 4, the end faces of the embedded pipe sleeves 17 are provided with embedded grooves 18, O-rings 19 are arranged in the embedded grooves 18, and the embedded pipe heads 13 are plugged into the embedded grooves 18, so that the end faces of the embedded pipe heads 13 abut on the O-rings 19; so that the first connecting pipe 9 and the second connecting pipe 10 can be respectively positioned and plugged into the embedded pipe sleeves 17 on the corresponding first gas pipe 11 and second gas pipe 12 through the cylindrical embedded pipe heads 13, so that the embedded pipe heads 13 are sealed by the O-rings 19 to prevent gas leakage, and the assembly is simpler.
[0036] The first connecting pipe 9 and the second connecting pipe 10 of the embodiment are connected through a first connecting rod 14 at one end close to the embedded pipe head 13, the first gas pipe 11 and the second gas pipe 12 are connected through a second connecting rod 20 at one end close to the embedded pipe sleeve 17, the first connecting rod 14 is provided with two first semicircular grooves 15 on the side away from the second connecting rod 20, the second connecting rod 20 is provided with two second semicircular grooves 21 on the side away from the first connecting rod 14, the first semicircular grooves 15 and the second semicircular grooves 21 are left-right symmetrical, the first semicircular grooves 15 and the second semicircular grooves 21 are connected through a throat clamp, so that the end face of the embedded pipe head 13 abuts on the O-ring 19 in the embedded groove 18; the throat clamp is clamped in the first semicircular groove 15 and the second semicircular groove 21, and then the throat clamp is locked, so that the first connecting pipe 9 and the second connecting pipe 10 abut on each other, so that the embedded pipe head 13 is tightly plugged into the embedded pipe sleeve 17, preventing loosening, and the sealing performance is higher; without using the screw connection mode in the prior art, the phenomenon of slipping or loosening due to excessive screwing is prevented.
[0037] It is worth noting that the first connecting pipe 9, the second connecting pipe 10 and the first connecting rod 14 are of an integrated structure, and the first gas pipe 11, the second gas pipe 12 and the second connecting rod 20 are of an integrated structure.
[0038] The first connecting rod 14 of the embodiment is provided with at least two limiting protrusions 16 on the side facing the second connecting rod 20, and the side of the second connecting rod 20 facing the first connecting rod 14 is a plane; after the throat clamp is locked, until the limiting protrusions 16 press against the plane of the second connecting rod 20, preventing the embedded pipe head 13 from excessively pressing the O-ring 19 and causing damage, and improving the service life of the O-ring 19 while ensuring the sealing performance.
[0039] Embodiment Two
[0040] In combination Figures 1 to 3 , Figures 6 to 8As shown, the difference between the second embodiment and the first embodiment is that the outer walls of the first gas pipe 11 and the second gas pipe 12 are connected through the reinforcing blocks, so that the first gas pipe 11 and the second gas pipe 12 swing on the first connecting pipe 9 and the second connecting pipe 10 through the plug sealing unit 8 at the same time; so that the first gas pipe 11 and the second gas pipe 12 can swing at a certain angle, so that the burner base assembly 7 can be installed in different cookers, which can be more suitable for the installation position of different burners and more flexible in installation.
[0041] The plug sealing unit 8 of the embodiment includes a ball-shaped embedded ball head 22, which is arranged on the end face of the output end of the first connecting pipe 9 and the second connecting pipe 10, and a spherical groove 24 is formed in the end face of the end of the first gas pipe 11 and the second gas pipe 12 close to the embedded ball head 22. A gas port is formed at one end of the embedded ball head 22 facing the spherical groove 24, a conical gasket 25 is installed in the spherical groove 24, and the embedded ball head 22 is embedded and installed in the spherical groove 24, so that the end of the embedded ball head 22 close to the gas port abuts on the conical gasket 25; by embedding the ball-shaped embedded ball head 22 in the spherical groove 24, the first gas pipe 11 and the second gas pipe 12 can swing at a certain angle in the up-down and left-right directions under the cooperation of the embedded ball head 22 and the spherical groove 24, so that the position of the entire burner base assembly 7 changes, which can be more suitable for different installation positions and more flexible in installation; the conical gasket 25 can more effectively cover the gas port around the embedded ball head 22 or cover part of the gas port after swinging, prevent gas leakage, and have better sealing performance.
[0042] The ball of the embedded ball head 22 of the embodiment is provided with a sealing ring groove, and a sealing ring 23 is installed in the sealing ring groove, and the outer wall of the sealing ring 23 is in contact with the inner wall of the spherical groove 24; by contacting the sealing ring 23 on the embedded ball head 22 with the inner wall of the spherical groove 24, the sealing performance can be further improved.
[0043] The first connecting pipe 9 and the second connecting pipe 10 of the embodiment are connected by a rotating shaft between the ends close to the embedded ball head 22, the first gas pipe 11 and the second gas pipe 12 are connected by a rotating shaft between the ends close to the embedded ball head 22, the first connecting rod 14 is provided with a first semicircular groove 15 on the side away from the second connecting rod 20, the second connecting rod 20 is provided with a second semicircular groove 21 on the side away from the first connecting rod 14, the first semicircular groove 15 and the second semicircular groove 21 are left-right symmetrical, the first semicircular groove 15 and the second semicircular groove 21 are connected by a grommet, so that the first connecting rod 14 and the second connecting rod 21 contact each other and rotate synchronously; the grommet can be stably clamped in the first semicircular groove 15 and the second semicircular groove 21, and after locking the grommet, the embedded ball head 22 is stably positioned in the spherical groove 24, and the embedded ball head 22 is in contact with the conical gasket 25, so that the sealing performance is better, and in the case that the first connecting rod 14 and the second connecting rod 21 can rotate, even after the swing angle, the first connecting rod 14 and the second connecting rod 21 can also be in close contact, preventing the first connecting rod 14 and the second connecting rod 21 from being pressed and hindered due to different angles.
[0044] The spherical groove 24 of the embodiment is provided with a limiting ring 26 close to the inner wall edge of the slot, and the side of the limiting ring 26 facing the slot is provided with a slope 27; during positioning and inserting the embedded ball head 22 into the spherical groove 24, the sealing ring 23 is protruded relative to the surface of the embedded ball head 22, and the sealing ring 23 can be better pressed into the spherical groove 24 under the action of the slope 27, preventing the sealing ring 23 from being separated from the spherical groove 24 during the swing angle.
[0045] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the described embodiments. For those skilled in the art, various changes, modifications, replacements and variations of the embodiments can be made without departing from the principles and spirits of the application, and still fall within the protection scope of the application.
Claims
1. A modular updraft range comprising: The stove body (1) and the burner base assembly (7), the stove body (1) is provided with a gas pipe connecting seat (2), the both ends of the gas pipe connecting seat (2) are communicated with valve seat (3) respectively, the output end of the valve seat (3) is communicated with valve seat connecting pipe part (4) respectively, the valve seat connecting pipe part (4) is provided with first connecting pipe (9) and second connecting pipe (10), the burner base assembly (7) includes first gas pipe (11), second gas pipe (12) and base (5), one side of the base (5) is provided with two nozzle seats (28), the nozzle (29) is communicated and arranged on the nozzle seat (28), one end of the first gas pipe (11) and the second gas pipe (12) is communicated with two nozzle seats (28) correspondingly, the other end of the first gas pipe (11) and the second gas pipe (12) is respectively communicated with first connecting pipe (9) and second connecting pipe (10) through plug-in sealing unit (8) separably, the base (5) is installed with fire divider (6); The outer wall of the first gas pipe (11) and the second gas pipe (12) is connected through the reinforcing block, so that the first gas pipe (11) and the second gas pipe (12) swing angle on the first connecting pipe (9) and the second connecting pipe (10) synchronously through the plug-in sealing unit (8); The plug-in sealing unit (8) includes cylindrical embedded pipe head (13), the embedded pipe head (13) is arranged on the end face of the output end of the first connecting pipe (9) and the second connecting pipe (10), one end of the first gas pipe (11) and the second gas pipe (12) close to the valve seat connecting pipe part (4) is provided with embedded pipe sleeve (17), the end face of the embedded pipe sleeve (17) is provided with embedded groove (18), the embedded pipe head (13) is inserted in the embedded groove (18);Or, The plug-in sealing unit (8) includes spherical embedded ball head (22), the embedded ball head (22) is arranged on the end face of the output end of the first connecting pipe (9) and the second connecting pipe (10), the end face of one end of the first gas pipe (11) and the second gas pipe (12) close to the embedded ball head (22) is provided with spherical groove (24), the end of the embedded ball head (22) towards the spherical groove (24) is provided with gas port, the embedded ball head (22) is embedded and installed in the spherical groove (24).
2. A modular top air cooking appliance as claimed in claim 1, wherein, The embedded groove (18) is installed with O ring (19), so that the end face of the embedded pipe head (13) is abutted on the O ring (19).
3. A modular top air cooking appliance as claimed in claim 2, wherein, The first connecting pipe (9) and the second connecting pipe (10) are connected by the first connecting rod (14) between the ends close to the embedded pipe head (13), the first gas pipe (11) and the second gas pipe (12) are connected by the second connecting rod (20) between the ends close to the embedded pipe sleeve (17), the first connecting rod (14) is provided with the first semicircular groove (15) on the side away from the second connecting rod (20), the second connecting rod (20) is provided with the second semicircular groove (21) on the side away from the first connecting rod (14), the first semicircular groove (15) and the second semicircular groove (21) are left-right symmetrical, the first semicircular groove (15) and the second semicircular groove (21) are connected by the grommet, and the end face of the embedded pipe head (13) is pressed on the O-shaped ring (19) in the embedded groove (18).
4. A modular top air cooking appliance as claimed in claim 3, wherein, The first connecting rod (14) is provided with at least two limiting convex ribs (16) on the side towards the second connecting rod (20), and the second connecting rod (20) is a plane on the side towards the first connecting rod (14).
5. A modular top air intake cooktop according to claim 1, wherein, The conical washer (25) is installed in the spherical groove (24), and the end of the embedded ball head (22) close to the gas port is abutted on the conical washer (25).
6. A modular top air cooking appliance as claimed in claim 1, wherein, The sealing ring groove is formed in the ball of the embedded ball head (22), the sealing ring (23) is installed in the sealing ring groove, and the outer wall of the sealing ring (23) is in contact with the inner wall of the spherical groove (24).
7. A modular top air cooking appliance as claimed in claim 6, wherein, The first connecting pipe (9) and the second connecting pipe (10) are connected by the first connecting rod (14) between the ends close to the embedded ball head (22), the first gas pipe (11) and the second gas pipe (12) are connected by the second connecting rod (21) between the ends close to the embedded ball head (22), the first connecting rod (14) is provided with the first semicircular groove (15) on the side away from the second connecting rod (20), the second connecting rod (20) is provided with the second semicircular groove (21) on the side away from the first connecting rod (14), the first semicircular groove (15) and the second semicircular groove (21) are left-right symmetrical, the first semicircular groove (15) and the second semicircular groove (21) are connected by the grommet, and the first connecting rod (14) and the second connecting rod (21) are in contact and rotate synchronously.
8. A modular top air cooking appliance as claimed in claim 7, wherein, The limiting ring (26) is arranged on the inner wall edge of the spherical groove (24) close to the slot, and the limiting ring (26) is provided with the inclined surface (27) on the side towards the slot.
Citation Information
Patent Citations
Gas valve and furnace end assembly of kitchen range
CN218154339U
Method of mounting gas burner to sheet metal or glass cooktop
US20130068214A1