CN220556185U - Gas adjusting device and combustion assembly - Google Patents
Gas adjusting device and combustion assembly Download PDFInfo
- Publication number
- CN220556185U CN220556185U CN202321993953.3U CN202321993953U CN220556185U CN 220556185 U CN220556185 U CN 220556185U CN 202321993953 U CN202321993953 U CN 202321993953U CN 220556185 U CN220556185 U CN 220556185U
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- burner
- connecting part
- housing
- nozzle
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 230000008859 change Effects 0.000 claims abstract description 3
- 230000003750 conditioning effect Effects 0.000 claims abstract 3
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Gas Burners (AREA)
Abstract
A combustion assembly comprises a gas adjusting device, a gas mixing pipe and a burner. The gas adjusting device comprises a gas adjusting valve, a nozzle, a connecting seat and an ignition component. The gas regulating valve comprises a valve body, a regulating piece and a knob, wherein the valve body is used for detachably connecting a gas tank. The adjusting piece is located in the gas channel of the valve body, and the knob is connected with the adjusting piece to change the gas flow. The nozzle is arranged on the valve body; the connecting seat is connected between the valve body and the burner, the connecting seat is provided with a gas mixing chamber and an air inlet, the nozzle stretches into the gas mixing chamber, and the air inlet is positioned at one side of the nozzle; the ignition assembly is arranged on the connecting seat, and an ignition electrode of the ignition assembly protrudes to the side of the combustor. Thus, a modular gas conditioning apparatus and a modular combustion assembly are formed.
Description
Technical Field
The utility model relates to a gas burner; in particular to a gas adjusting device and a combustion assembly.
Background
In recent years, the audience of outdoor camping is wider and wider, and meanwhile, people are brought with an opportunity to be close to the nature, and an outdoor leisure furnace is an indispensable tool for outdoor camping. An outdoor leisure oven structure is known to comprise a gas tank, a gas hose, an igniter and a burner, wherein the burner is connected with the gas tank through the gas hose, gas is led in through the gas hose, and then the igniter is used for ignition, so that the purpose that the burner can burn is achieved.
However, the gas hose is easily deformed and difficult to fix, and the gas hose may be too long to cause a user to unintentionally pull the gas tank or the burner, so that the gas tank or the burner is dropped to be damaged, and even fire is generated. Moreover, the material of the gas hose is not tough, and the gas hose is easy to break or damage after being worn for a long time, so that the gas in the gas tank may also risk leaking from the broken gas hose.
Therefore, the manner of connecting the gas tank and the burner by using the gas hose is still not perfect, and the improvement is still needed.
Disclosure of Invention
In view of the above, an object of the present utility model is to provide a gas adjusting device and a combustion assembly, which can form a modularized gas adjusting device and a modularized combustion assembly.
In order to achieve the above object, the present utility model provides a gas adjusting device for connecting a burner and a gas tank; the gas adjusting device comprises a gas adjusting valve, a nozzle, a connecting seat and an ignition component. The gas regulating valve comprises a valve body, a regulating piece and a knob, wherein the valve body is provided with a gas connecting part and a first connecting part, and the gas connecting part is used for detachably connecting the gas tank; the gas channel is provided with an inlet and an outlet, the inlet is formed in the gas connecting part, and the outlet is formed in the first connecting part; the adjusting piece is positioned in the gas channel, the knob is connected with the adjusting piece, and the knob is used for driving the adjusting piece so as to change the gas flow passing through the gas channel; the nozzle is arranged on the valve body and positioned at the outlet; the connecting seat comprises a shell, wherein the shell is provided with a first end and a second end which are opposite to each other, the first end is provided with a second connecting part, and the second connecting part is connected with the first connecting part; the shell is provided with a gas mixing chamber, a through hole, at least one air inlet and an air outlet, wherein the through hole is formed in the first end, the nozzle stretches into the gas mixing chamber from the through hole, the at least one air inlet is formed between the first end and the second end and is formed in one side of the nozzle, and the air outlet is formed in the second end and is used for being communicated with the burner; the ignition assembly is arranged on the shell and comprises a high-voltage igniter, an ignition electrode and a button, the high-voltage igniter is located in the gas mixing chamber, the ignition electrode is electrically connected with the high-voltage igniter and protrudes out from the second end of the shell, and the button is connected with the high-voltage igniter and is used for starting the high-voltage igniter.
The first connecting part and the second connecting part are detachably connected.
The second connecting part is provided with a positioning ring groove and a plurality of notches, the positioning ring groove is positioned on the wall of the through hole, and the notches are positioned at the end part of the first end and communicated with the positioning ring groove; the first connecting part is provided with a plurality of buckle plates, and the buckle plates respectively enter the positioning ring groove through the plurality of notches and are combined with the positioning ring groove.
The number of the at least one air inlet of the shell is two, and the two air inlets are respectively positioned at two sides of the nozzle.
The high-voltage igniter is positioned in the gas mixing chamber, and the ignition electrode protrudes outwards from the second end of the shell.
The high-voltage igniter is arranged on the upper shell, and the button penetrates through the upper shell and is connected with the high-voltage igniter; the at least one air inlet is positioned on the lower shell.
Wherein at least one of the upper shell and the lower shell is provided with a fixing groove at the second end; the ignition assembly comprises a fixed seat, the ignition electrode is combined with the fixed seat, and the fixed seat is combined with the fixed groove.
The utility model provides a combustion assembly which is arranged at the top of a furnace body of an oven, and comprises the gas adjusting device; the air mixing pipe is provided with two ends, one end of the air mixing pipe is connected with the second end of the shell and is positioned at the air outlet; and a burner communicated with the other end of the gas mixing pipe.
Wherein the combustion assembly comprises a top cover positioned above the burner; the burner comprises a plurality of fixing pieces, and the plurality of fixing pieces are connected with the top cover.
The connecting seat comprises a fixing plate, the fixing plate is connected with the shell, and the fixing plate is connected with the top cover.
The utility model has the advantages that the gas adjusting device has a modularized structure and can be connected with the burner and the gas tank, and the combustion assembly also has a modularized structure, so that the defect that the gas hose is used for connecting the gas tank and the burner is effectively overcome. In addition, the air intake may introduce combustion-supporting air to increase combustion efficiency.
Drawings
FIG. 1 is a perspective view of a combustion assembly and oven to which the present utility model is applied, in accordance with a preferred embodiment of the present utility model.
FIG. 2 is an exploded perspective view of the combustion assembly and the oven to which the present utility model is applied according to the above preferred embodiment.
FIG. 3 is a perspective view of the combustion assembly of the preferred embodiment of the present utility model.
FIG. 4 is an exploded perspective view of the combustion assembly of the above preferred embodiment of the present utility model.
FIG. 5 is an exploded perspective view of another view of the combustion assembly of the above preferred embodiment of the present utility model.
Fig. 6 is a perspective view of the gas regulating valve according to the above preferred embodiment of the present utility model.
Fig. 7 is a perspective view of the connecting base and the ignition module according to the preferred embodiment of the present utility model.
Fig. 8 is an exploded perspective view of the connecting base and the ignition module according to the above preferred embodiment of the present utility model.
Fig. 9 is an exploded perspective view of another view of the connecting base and the ignition module according to the above preferred embodiment of the present utility model.
Fig. 10 is a bottom view of the combustion assembly of the above preferred embodiment of the present utility model.
FIG. 11 is a top view of the combustion assembly of the preferred embodiment of the present utility model.
Fig. 12 is a sectional view taken along the direction 12-12 of fig. 11.
Fig. 13 is a sectional view in the direction 13-13 of fig. 11.
Reference numerals illustrate:
1: oven with baking oven
1a: furnace body
2: gas pot
3: top cover
3a: binding post
4: fixing piece
4a: perforation
100: combustion assembly
10: gas adjusting device
12: gas regulating valve
122: adjusting piece
122a: adjusting part
122b: thread segment
123: screw seat
124: knob
126: flow restriction
126a: flow limiting hole
13: valve body
132: gas connecting part
132a: thread surface
132b: thimble
134: first connecting part
134a: buckle piece
136: gas channel
136a: an inlet
136b: an outlet
136c: valve port
138: main body part
138a: shaft hole
138b: a first hole section
138c: a second hole section
139: side connecting part
139a: side hole
14: nozzle
16: connecting seat
161: fixing plate
161a: perforation
17: shell body
172: first end
173: second connecting part
173a: positioning ring groove
173b: notch
174: second end
174a: fixing groove
174b: half groove
176: mixed air chamber
176a: through hole
176b: air inlet
176c: air outlet
177: upper shell
177a, 178a: half ring groove
177b, 178b: half notch
177c: side opening
178: lower shell
179: fixing screw
18: ignition assembly
182: high-voltage igniter
184: ignition electrode
186: push button
188: fixing seat
20: air mixing pipe
30: burner with a burner body
31: fire hole
32: screw cap
Detailed Description
In order to more clearly illustrate the present utility model, preferred embodiments are described in detail below with reference to the accompanying drawings. Referring to fig. 1 and 2, an oven 1 to which a combustion assembly 100 according to a preferred embodiment of the present utility model is applied is shown, the combustion assembly 100 is disposed on top of a oven body 1a of the oven, and the combustion assembly 100 includes a gas adjusting device 10, a gas mixing tube 20 and a burner 30.
Referring to fig. 3 to 13, the gas adjusting device 10 is connected to a gas tank 2 to adjust the flow rate of the gas outputted from the gas tank 2. The gas regulating device 10 comprises a gas regulating valve 12, a nozzle 14, a connecting seat 16 and an ignition component 18.
The gas regulating valve 12 includes a valve body 13, a regulating member 122, and a knob 124, wherein the valve body 13 has a gas connecting portion 132 and a first connecting portion 134. The gas connection portion 132 is detachably connected to the gas tank 2, the valve body 13 has a gas passage 136 therein, and the gas passage 136 has an inlet 136a and an outlet 136b. In this embodiment, the valve body 13 has a main body portion 138 and a one-side connecting portion 139, the main body portion 138 is cylindrical, and the main body portion 138 has two opposite ends in the axial direction, wherein one end forms the first connecting portion 134, the main body portion 138 has an axial hole 138a along the axial direction, the axial hole has a first hole section 138b and a second hole section 138c, the first hole section 138b is in communication with the first connecting portion 134, and the second hole section 138c is provided for the adjustment member 122. The side connection part 139 is connected to one side of the main body part 138, and the side connection part 139 has the gas connection part 132. The side connecting part 139 is internally provided with a side hole 139a, the side hole 139a is communicated with the shaft hole 138a, the axial direction of the side hole 139a is intersected with the axial direction of the shaft hole 138a, and an included angle between the axial direction of the side hole 139a and the axial direction of the shaft hole 138a is between 70 and 80 degrees. The gas passage 136 is formed between the side hole 139a and the first hole section 138b of the shaft hole 138a, the inlet 136a of the gas passage 136 is formed at the gas connection portion 132, and the outlet 136b of the gas passage 136 is formed at the first connection portion 134.
The first connecting portion 134 has a plurality of tabs 134a extending along a radial direction, the plurality of tabs 134a surrounds an outlet 136b of the gas passage 136, in this embodiment, two tabs 134a, the two tabs 134a being located at opposite positions and the outlet 136b being located between the two tabs 134 a. The gas passage 136 has a valve port 136c, and the valve port 136c is located at the connection between the first hole section 138b and the second hole section 138 c. The gas connection portion 132 has a threaded surface 132a, and the threaded surface 132a is detachably connected to the gas tank 2. The inlet 136a is provided with a thimble 132b, and when the gas tank 2 is combined with the gas connecting portion 132, the thimble 132b abuts against the gas outlet valve of the gas tank 2, so that the gas tank 2 injects the gas into the gas channel 136.
The adjusting member 122 is disposed in the gas passage 136, and one end of the adjusting member 122 has a tapered adjusting portion 122a, the adjusting portion 122a corresponds to the valve port 136c, the body of the adjusting member 122 has a threaded section 122b, the threaded section 122b is coupled to the main body 138 of the valve body 13 through a threaded seat 123, and the threaded section 122b is screwed with the threaded seat 123. The knob 124 is located at the other end of the main body portion 138 of the valve body 13 opposite to the first connecting portion 134, and the knob 124 is coupled to the other end of the adjusting member 122. When the knob 124 is rotated, the adjusting member 122 is driven to move along the axial direction of the shaft hole 138a, so that the adjusting portion 122a moves relative to the valve port 136c, i.e. the opening of the valve port 136c is changed, thereby changing the gas flow rate through the gas channel 136. When the regulator 122a plugs the valve port 136c, the gas may be blocked.
The gas regulating valve 12 further includes a flow restriction 126, the flow restriction 126 is located in the gas channel 136 and is located between the outlet 136b and the regulating member 122 and is located at a first hole section 138b of the shaft hole 138a, and the flow restriction 126 has a restriction hole 126a, and the maximum flow of the gas passing through the aperture of the restriction hole 126a can be restricted.
The nozzle 14 is disposed on the valve body 13 and located at the outlet 136b, and the gas in the gas channel 136 is output through the nozzle 14.
The connecting seat 16 includes a housing 17, the housing 17 has a first end 172 and a second end 174 opposite to each other, the first end 172 has a second connecting portion 173, and the second connecting portion 173 connects the first connecting portion 134. The housing 17 has a gas mixing chamber 176, a through hole 176a communicating with the gas mixing chamber, two gas inlets 176b and a gas outlet 176c, the through hole 176a being located at the first end 172 and the nozzle 14 extending from the through hole 176a into the gas mixing chamber 176, the two gas inlets 176b being located between the first end 172 and the second end 174 and on opposite sides of the nozzle 14, the gas outlet 176c being located at the second end 174 for communicating with the burner 30.
In this embodiment, the second connection portion 173 has a positioning ring groove 173a and a plurality of notches 173b, the positioning ring groove 173a is located on the wall of the through hole 176a, and the plurality of notches 173b are located at the end portion of the first end 172 and are in communication with the positioning ring groove 173 a. The plurality of tabs 134a of the first connecting portion 134 of the valve body 13 respectively enter the detent ring groove 173a through the plurality of notches 173b and are combined with the detent ring groove 173 a. After passing through the notches 173b, the plurality of tabs 134a rotate the valve body 13 around the axial direction of the main body 138 of the valve body 13 in one direction, so that the plurality of tabs 134a can be driven to engage with the positioning ring groove 173a, and the plurality of tabs 134a can be separated from the positioning ring groove 173a by rotating the valve body 13 in an opposite direction, so that the first connecting portion 134 and the second connecting portion 173 are detachably connected.
More specifically, the housing 17 includes an upper housing 177 and a lower housing 178, and the upper housing 177 and the lower housing 178 are connected and fixed by a fixing screw 179. The upper housing 177 has a half ring groove 177a and two half notches 177b at the first end 172; the lower housing 178 also has a half ring groove 178a and two half notches 178b at the first end 172. After the upper housing 177 and the lower housing 178 are combined, the positioning groove 173a is formed by the half groove 177a of the upper housing 177 and the half groove 178a of the lower housing 178, and the plurality of notches 173b are formed by the half notch 177b of the upper housing 177 and the half notch 178b of the lower housing 178.
The upper housing 177 has a side opening 177c, and the side opening 177c communicates with the inside of the upper housing 177. The lower housing 178 has the two air inlets 176b. In one embodiment, there may also be one air inlet 176b, and the air inlet 176b is located on one side of the nozzle 14 on the lower housing 178.
At least one of the upper housing 177 and the lower housing 178 has a fixing groove 174a at the second end 174, and in this embodiment, the upper housing 177 and the lower housing 178 each have a fixing groove 174a. The upper housing 177 and the lower housing 178 have half grooves 174b, respectively, and the two half grooves 174b are combined to form the air outlet 176c.
In addition, the connecting seat 16 includes a fixing plate 161, and the fixing plate 161 is connected to the upper housing 177 of the housing 17 and extends toward the burner 30.
The ignition assembly 18 is disposed on the housing 17, and comprises a high voltage igniter 182, an ignition electrode 184 and a button 186, wherein the ignition electrode 184 is electrically connected to the high voltage igniter 182, and the button 186 is connected to the high voltage igniter 182 for starting the high voltage igniter 182.
In this embodiment, the high-pressure igniter 182 is disposed inside the upper housing 177 and is located in the gas mixing chamber 176. The ignition assembly 18 includes a fixing base 188, and the ignition electrode 184 is coupled to the fixing base 188, and the fixing base 188 is coupled to the fixing groove 174a. The ignition electrode 184 protrudes from the second end 174 of the housing 17 and extends in the direction of the burner 30. The button 186 passes through a side opening 177c of the upper housing 177 and is connected to the high voltage igniter 182.
The air mixing pipe 20 is a square pipe body and has two ends, one end of the air mixing pipe is connected with the second end 174 of the housing 17 and is located at the air outlet 176c, the air mixing pipe 20 is clamped and fixed by the upper housing 177 and the lower housing 178, and the other end of the air mixing pipe 20 penetrates into the combustor 30. The burner 30 is communicated with the other end of the gas mixing pipe 20.
The combustion assembly 100 may also include a top cover 3, the top cover 3 being located above the burner 30. The burner 30 includes a plurality of fixing members 4, and the plurality of fixing members 4 are connected to the top cover 3. The top cover 3 is connected with the fixing plate 161 of the connecting seat 16. Therefore, the top cover 3 strengthens the structural strength between the connecting seat 16 and the burner 30, so that the top cover 3 is more stable with the burner 30 and the connecting seat 16. The top cover 3 can be directly covered on the top of the furnace body 1 a. The top cover 3 shields the top of the burner 30 to prevent foreign matters from falling down to the burner 30 from above the burner 30. In this embodiment, a plurality of coupling posts 3a are disposed at the bottom of the top cover, each coupling post 3a has a thread, each fixing member 4 and the fixing plate 161 have corresponding through holes 4a, 161a, each coupling post 3a passes through the through hole 4a of each fixing member 4 and the through hole 161a of the fixing plate 161, and then is locked to the plurality of coupling posts 3a by a plurality of nuts 32, so as to connect the top cover 3 to the fixing members 4 and the fixing plates 161.
In use, the user rotates the knob 124 to drive the adjusting member 122 to open the valve port 136c of the gas channel 136, so that the gas of the gas tank 2 is injected into the gas mixing chamber 176 of the connecting seat 16 from the nozzle 14 through the gas channel 136. When the nozzle 14 sprays gas, the combustion-supporting air is simultaneously introduced into the air mixing chamber 176 through the two air inlets 176b, and then is output to the burner 30 through the air outlet 176c of the connecting seat 16 and the air mixing pipe 20, and is output through the fire outlet 31 at the bottom of the burner 30. Meanwhile, the user presses a button 186 located on the connection base 16 to trigger the high voltage igniter 182 to generate a high voltage, and the high voltage generated by the high voltage igniter 182 generates a spark via the ignition electrode 184 to ignite the gas outputted from the plurality of fire outlets 31 to form a flame. It should be noted that, the combustion air is introduced into the air inlet 176b of the connecting seat 16 before the gas enters the burner 30, so that the combustion efficiency of the gas can be improved compared with the hose connection. In addition, the gas mixing pipe 20 penetrates into the burner 30, so that the advancing path of the gas and the air can be increased, the mixing effect can be improved, and the combustion efficiency can be improved.
As described above, the gas adjusting device 10 forms a modularized structure to fix the gas tank 2 with respect to the burner 30, to supply the gas of the gas tank 2 to the burner 30 without using a hose, and to improve combustion efficiency. The combustion assembly 100 of this embodiment also has a modularized structure, and when disposed at the top of the furnace body 1a, the gas tank 2 can be suspended and erected (refer to fig. 1) relative to the furnace body 1a, and no additional object placement table is required to place the gas tank 2, so that the gas tank 2 can be prevented from toppling.
The foregoing description is only illustrative of the preferred embodiments of the utility model, and is therefore intended to cover all modifications that fall within the true scope of the utility model as defined by the following claims.
Claims (10)
1. A gas adjusting device for connecting a burner and a gas tank; the gas regulating device is characterized by comprising:
the gas regulating valve comprises a valve body, a regulating piece and a knob, wherein the valve body is provided with a gas connecting part and a first connecting part, and the gas connecting part is used for detachably connecting the gas tank; the gas channel is provided with an inlet and an outlet, the inlet is formed in the gas connecting part, and the outlet is formed in the first connecting part; the adjusting piece is positioned in the gas channel, the knob is connected with the adjusting piece, and the knob is used for driving the adjusting piece so as to change the gas flow passing through the gas channel;
the nozzle is arranged on the valve body and positioned at the outlet;
the connecting seat comprises a shell, wherein the shell is provided with a first end and a second end which are opposite to each other, the first end is provided with a second connecting part, and the second connecting part is connected with the first connecting part; the shell is provided with a gas mixing chamber, a through hole, at least one air inlet and an air outlet, wherein the through hole is formed in the first end, the nozzle stretches into the gas mixing chamber from the through hole, the at least one air inlet is formed between the first end and the second end and is formed in one side of the nozzle, and the air outlet is formed in the second end and is used for being communicated with the burner; and
the ignition assembly is arranged on the shell and comprises a high-voltage igniter, an ignition electrode and a button, wherein the ignition electrode is electrically connected with the high-voltage igniter, and the button is connected with the high-voltage igniter and used for starting the high-voltage igniter.
2. The gas regulating device according to claim 1, wherein the first connecting portion and the second connecting portion are detachably connected.
3. The gas regulating device according to claim 1, wherein the second connecting portion has a positioning ring groove and a plurality of notches, the positioning ring groove is located on a wall of the through hole, and the plurality of notches are located at an end of the first end and are communicated with the positioning ring groove; the first connecting part is provided with a plurality of buckle plates, and the buckle plates respectively enter the positioning ring groove through the plurality of notches and are combined with the positioning ring groove.
4. The gas regulating device according to claim 1, wherein the number of the at least one gas inlet of the housing is two, and the two gas inlets are respectively located at both sides of the nozzle.
5. The gas regulating device of claim 1, wherein said high pressure igniter is located in said plenum, and said ignition electrode protrudes outwardly from said second end of said housing.
6. The gas regulating device according to claim 5, wherein the housing comprises an upper housing and a lower housing, the high-voltage igniter is disposed on the upper housing, and the button is disposed through the upper housing and connected to the high-voltage igniter; the at least one air inlet is positioned on the lower shell.
7. The gas conditioning unit according to claim 6, wherein at least one of the upper housing and the lower housing has a fixing groove at the second end; the ignition assembly comprises a fixed seat, the ignition electrode is combined with the fixed seat, and the fixed seat is combined with the fixed groove.
8. A combustion assembly for placement on top of a body of an oven and for connection to a gas tank, the combustion assembly comprising:
the gas conditioning device according to any one of claims 1 to 7;
the air mixing pipe is provided with two ends, one end of the air mixing pipe is connected with the second end of the shell and is positioned at the air outlet; and
and the burner is communicated with the other end of the gas mixing pipe.
9. The combustion assembly of claim 8, comprising a top cover positioned over said burner; the burner comprises a plurality of fixing pieces, and the plurality of fixing pieces are connected with the top cover.
10. The combustion assembly of claim 9, wherein the connector includes a securing plate, the securing plate coupled to the housing and the securing plate coupled to the top cover.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202321993953.3U CN220556185U (en) | 2023-07-27 | 2023-07-27 | Gas adjusting device and combustion assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202321993953.3U CN220556185U (en) | 2023-07-27 | 2023-07-27 | Gas adjusting device and combustion assembly |
Publications (1)
Publication Number | Publication Date |
---|---|
CN220556185U true CN220556185U (en) | 2024-03-05 |
Family
ID=90050523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202321993953.3U Active CN220556185U (en) | 2023-07-27 | 2023-07-27 | Gas adjusting device and combustion assembly |
Country Status (1)
Country | Link |
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CN (1) | CN220556185U (en) |
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2023
- 2023-07-27 CN CN202321993953.3U patent/CN220556185U/en active Active
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