CN216814644U - Combustion chamber and water heater comprising same - Google Patents
Combustion chamber and water heater comprising same Download PDFInfo
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- CN216814644U CN216814644U CN202122370305.XU CN202122370305U CN216814644U CN 216814644 U CN216814644 U CN 216814644U CN 202122370305 U CN202122370305 U CN 202122370305U CN 216814644 U CN216814644 U CN 216814644U
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Abstract
The utility model provides a combustion chamber and a water heater comprising the same, and belongs to the field of gas water heaters. The combustion chamber comprises a body and at least one heat insulation component, and the heat insulation component is fixed on the inner side wall of the top end of the body. In this scheme, the top of the inside wall of combustion chamber sets up heat-proof component, and heat-proof component separates the inside heat of combustion chamber and the lateral wall of combustion chamber, has blocked the inside thermal outside transmission to the combustion chamber body of combustion chamber, has reduced the combustion chamber and has got rid of the high problem of coil pipe back outside temperature, has improved the utilization efficiency of the energy, realizes the effect of cost reduction increase, and this scheme is simple, reliable, the practicality is strong.
Description
Technical Field
The utility model relates to the field of combustors, in particular to a combustion chamber and a water heater comprising the same.
Background
The utility model provides a combustion chamber, uses in gas heater's heat transfer system, and most gas heater all includes other parts such as coil pipe in the existing market, and the material of coil pipe is mostly the metal. However, in the actual heat exchange process, the heat exchange fins are mainly used for heat exchange, so that redundant coil pipes can be removed, the coil pipes are removed for reducing the cost, the height between the combustion chamber and the heat exchanger meets a certain requirement, the height from the fire exhaust port to the heat dissipation fins is unchanged, and after the coil pipes are removed, the combustion chamber is correspondingly heightened, so that the cost of the gas water heater can be reduced. In addition, because the outside of the combustion chamber is not provided with the coil pipe to absorb heat, the temperature of the outside of the combustion chamber is too high, resources such as heat energy are wasted, and meanwhile, the daily use is inconvenient due to the fact that the temperature of the outside is too high.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defect that the temperature of the outer side of a combustion chamber is overhigh after a coil is removed from the outer side of the combustion chamber in the prior art, the utility model provides the combustion chamber and the water heater comprising the same.
The utility model solves the technical problems through the following technical scheme:
the combustion chamber includes a body and at least one thermal insulation member located on an inner sidewall of a top end of the body.
In this scheme, the top of the inside wall of combustion chamber sets up heat-proof component, and heat-proof component separates the inside heat of combustion chamber and the lateral wall of combustion chamber, has blocked the inside thermal outside transmission to the combustion chamber body of combustion chamber, has reduced the combustion chamber and has got rid of the high problem of coil pipe back outside temperature, has improved the utilization efficiency of the energy, realizes the effect of cost reduction increase, and this scheme is simple, reliable, the practicality is strong.
Preferably, the heat insulation component and the inner side wall of the body have a gap.
In this scheme, there is the clearance in the inside wall of the body of heat insulating part and combustion chamber for the air that gets into the combustion chamber can get into the space of heat insulating part and combustion chamber body inside wall, because the coefficient of heat conductivity of air is less than ordinary metal, so the heat sees through after the heat insulating part passes through the air, the heat greatly reduced of transmission, there is the clearance simultaneously and can make the air flow in the clearance, the heat in the inside wall of combustion chamber body and the heat in the heat insulating part outside can be taken away in the flow of air, thereby reduce the temperature of the combustion chamber outside.
Preferably, the heat insulation member includes a first heat insulation member and a second heat insulation member, and a distance between the first heat insulation member and the inner side wall of the body is greater than a distance between the second heat insulation member and the inner side wall of the body.
In this scheme, because the temperature of the top of combustion chamber is higher than the temperature of below usually, through set up first heat insulating part and second heat insulating part on heat insulating part, the interval of the inside wall of first heat insulating part and body is greater than the interval of the inside wall of second heat insulating part and body, the air chamber that forms between the inside wall of first heat insulating part and body is great, the outside transmission of heat that can the separation combustion chamber top, this scheme can the outside transmission of a large amount of heats of separation combustion chamber.
Preferably, the distance between the first heat insulation component and the inner side wall of the body is more than 4 mm; the distance from the second heat insulation component to the inner side wall of the body is larger than 2 mm.
In the scheme, the distance between the first heat insulation part and the inner side wall of the body is more than 4mm, so that the attenuation of heat transfer with higher temperature above the combustion chamber is met, the outward transfer of heat is reduced, the temperature outside the combustion chamber is reduced, and meanwhile, the distance cannot be too large, so that the cost of the whole combustion chamber is improved in a hands-free manner; in a similar way, the distance between the second heat insulation part and the inner side wall of the body is larger than 2mm, so that the attenuation of the heat outside the combustion chamber is met, the heat outside is reduced, and the temperature outside the combustion chamber is reduced.
Preferably, the top end of the body has a first extending end, and the top of the heat insulating member has a second extending end, and the second extending end is located on the first extending end.
In this scheme, the top of body has first extension end, and the heat-insulating part top has the second and extends the end, and the second extends the top that the end is located the second and extends the end for the top of the relative body in heat-insulating part's position is fixed, prevents that heat-insulating part from producing the displacement and influencing thermal-insulated effect.
Preferably, the second extending end is provided with a vent hole, and the vent hole is communicated with the gap.
In this scheme, the second extends the end and still is provided with the air vent for heat behind the heat insulating part is taken away through the flow of air, and the heat of heat insulating part and combustion chamber body inside wall has been taken away to microthermal gas through heat insulating part's inside wall and heat insulating part's the outside, thereby has reduced the temperature of the combustion chamber outside.
Preferably, the vent holes are uniformly distributed at the second extending end.
In this scheme, the evenly distributed of air vent can accelerate the circulation of air to the heat of air chamber is transmitted after heat-insulating part to faster reduction, and a large amount of heats can be absorbed to microthermal gas, thereby the temperature of the quick reduction combustion chamber outside.
Preferably, a plurality of said insulating members are adjacent to each other or a plurality of said insulating members are adjacent to each other to form an annular structure.
In the scheme, one or more heat insulation parts can be arranged, one heat insulation part is relatively fixed with the inner side wall of the combustion chamber body, and the temperature of the outer side of the combustion chamber fixed with the heat insulation part is reduced; a plurality of heat insulating part constitute an annular structure for form the air chamber between heat insulating part and the lateral wall of combustion chamber, because the coefficient of heat conductivity of air is low, and the heat can be taken away in the flow of air moreover, thereby has reduced the temperature of whole combustion chamber lateral wall.
Preferably, the heat insulation member is provided with a protrusion, and the protrusion abuts against the inner side wall of the body.
In this scheme, through set up the bulge on heat insulating part, guaranteed to have the clearance between the inside wall of the body of heat insulating part and combustion chamber, the existence in clearance has guaranteed that the air flows in the clearance to the temperature of the combustion chamber outside has been reduced.
Preferably, the combustion chamber protrusion is located at a lower end of the heat insulating member.
In this scheme, the bulge is located heat insulating elements's lower extreme for distance between heat insulating elements and the inside wall of combustion chamber body can be guaranteed, and heat insulating elements's cost can be saved to the bulge's lower extreme that is located heat insulating elements simultaneously.
A water heater comprising a combustion chamber as described above.
In this scheme, the top of the inside wall of combustion chamber sets up heat-proof component, and heat-proof component separates the inside heat of combustion chamber and the lateral wall of combustion chamber, has blocked the inside thermal outside transmission to the combustion chamber body of combustion chamber, has reduced the combustion chamber and has got rid of the high problem of coil pipe back outside temperature, has improved the utilization efficiency of the energy, realizes the effect of cost reduction increase, and this scheme is simple, reliable, the practicality is strong.
Preferably, the water heater further comprises a fire grate assembly, the fire grate assembly is positioned at the bottom of the combustion chamber, and the lower end of the heat insulation component is flush with the upper end of the fire grate assembly or is lower than the upper end of the fire grate assembly.
In this scheme, the lower terminal surface of heat-insulating part and the upper end parallel and level that the fire was arranged perhaps heat-insulating part's lower extreme is less than the upper end that the fire was arranged is in order to make the mist process that the burning of fire was arranged the medial surface of heat-insulating part rises, can guarantee that the mixed high-temperature gas that the burning back of fire row subassembly generated rises through the combustion chamber, prevents that mixed high-temperature gas from getting into the air cavity of the inside wall of heat-insulating part and combustion chamber through the clearance of heat-insulating part and fire row subassembly and reducing the cooling effect of heat-insulating part to the inside wall of combustion chamber body.
Preferably, the water heater further comprises a heat exchanger, the top end of the body is bent upwards, and the lower end face of the heat exchanger is located in the upward bent part of the body.
In this scheme, set up ascending bending through the top at hot body for heat exchanger can not take place the displacement of side direction, has improved whole heat transfer system's rigidity, and heat exchanger's lower terminal surface is located the top of body, makes the high temperature flue gas that the combustion chamber produced directly carry out the heat transfer with heat exchanger, has improved heat exchanger's heat exchange efficiency, has also improved the utilization ratio of heat energy simultaneously.
Preferably, the heat exchanger further has a first through hole, the body has a second through hole, the heat insulating member has a third through hole, and the first through hole, the second through hole and the third through hole are communicated and fastened by a fastening member.
In this scheme, the through-hole of heat transfer part, body and heat insulating part communicates each other and fastens through the same fastener for above-mentioned three part can be as a whole, has improved the heat exchange efficiency of combustion chamber, has improved whole heat transfer system's rigidity, has improved whole system's reliability simultaneously.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the utility model.
The positive progress effects of the utility model are as follows: the top of the inside wall of combustion chamber sets up heat-proof component, and heat-proof component separates the inside heat of combustion chamber and the lateral wall of combustion chamber, has blocked the inside thermal outside transmission to the combustion chamber body of combustion chamber, has reduced the combustion chamber and has got rid of the high problem of outside temperature behind the coil pipe, has improved the utilization efficiency of the energy, realizes the effect of cost reduction increase, and this scheme is simple, reliable, the practicality is strong.
Drawings
Fig. 1 is a schematic perspective exploded view of a combustion chamber according to an embodiment of the present invention.
Fig. 2 is a schematic perspective view of a combustion chamber according to an embodiment of the present invention.
FIG. 3 is a schematic right sectional view of a combustion chamber according to an embodiment of the present invention.
FIG. 4 is a schematic sectional front view of a combustion chamber according to an embodiment of the present invention.
FIG. 5 is a perspective view of a combustion chamber and a heat exchanger according to an embodiment of the present invention.
FIG. 6 is a schematic view of a partial structure of a combustion chamber and a heat exchanger according to an embodiment of the present invention.
Description of the reference numerals
First extension end 11
Heat insulating material 2
Second extension end 20
First heat insulating member 21
Second heat insulating member 23
Ring structure 6
First through hole 91
Second through hole 92
Third through hole 93
Detailed Description
The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings. But should not be construed as limiting the scope of the present embodiments.
As shown in fig. 1 and 2, the combustion chamber 1 includes a body 10 and at least one heat insulating member 2, wherein a top end of the body 10 has a first extending end 11; the top of the heat insulating member 2 has a second extending end 20, the second extending end 20 is located on the first extending end 11, and the heat insulating member 2 is located in the body 10.
Set up first extension end 11 through the top of the body 10 at combustion chamber 1, heat insulating part 2 sets up the second and extends end 20, extend end 20 through the second and place in first extension end 11 top, realize that heat insulating part 2 puts on the combustion chamber, the inside of combustion chamber 1 sets up heat insulating part 2, heat insulating part 2 separates the heat of 1 inside of combustion chamber and combustion chamber 1's lateral wall, thermal outside transmission has been blocked, the problem that outside temperature is high after combustion chamber 1 gets rid of the coil pipe has been reduced, the utilization efficiency of the energy has been improved, realize the effect of cost reduction and efficiency improvement, the simple reliable practicality of this scheme is strong.
In other embodiments, bolts and nuts may be used to fix the heat insulating member 2 to the inner sidewall of the body 10.
In this embodiment, the material of the heat insulating member 2 is 430 stainless steel, and the 430 stainless steel has better temperature resistance and is suitable in price.
In other embodiments, the heat insulating member 2 may employ an inorganic non-metallic material.
In a preferred embodiment, the heat insulating member 2 has a gap 3 with the inner side wall of the body 10.
In the present embodiment, as shown in fig. 3 and 4, there is a gap 3 between the heat insulating member 2 and the inner sidewall of the main body 10 of the combustion chamber 1, so that the air entering the combustion chamber 1 can enter the gap between the heat insulating member 2 and the inner sidewall of the main body 10 of the combustion chamber 1, and since the thermal conductivity of the air is lower than that of a common metal, the heat transferred after passing through the air by the heat insulating member 2 is greatly reduced, thereby reducing the temperature outside the combustion chamber 1.
In a preferred embodiment, the heat insulating member 2 includes a first heat insulating member 21 and a second heat insulating member 23, and the first heat insulating member 21 is spaced from the inner sidewall of the main body 10 by a distance greater than the second heat insulating member 23.
In this embodiment, by providing the first heat insulating member 21 and the second heat insulating member 23 on the heat insulating member 2, the distance between the first heat insulating member 21 and the inner side wall of the main body 10 is greater than the distance between the second heat insulating member 23 and the inner side wall of the main body 10, because the temperature of the upper part of the combustion chamber 1 is higher than that of the lower part, the present scheme can block a large amount of heat of the combustion chamber 1 from transferring outwards, the gap between the first heat insulating member 21 and the combustion chamber main body 10 is large, the volume of the formed air cavity is large, which is more beneficial to heat insulation, if the combustion chamber 1 is unchanged, the heat insulating member 2 is closer to the flame of the combustion chamber 1, and the heat insulation effect is good. However, the interval between the first heat insulating member 21 and the combustion chamber main body 10 cannot be so large that the heat insulating member 2 is easily burned if the volume of the combustion chamber 1 is fixed;
in a preferred embodiment, the distance between the first heat insulation component 21 and the inner side wall of the body 10 is more than 4 mm; the distance between the second heat insulation component 23 and the inner side wall of the body 10 is more than 2 mm.
In the embodiment, the distance between the first heat insulation component 21 and the inner side wall of the body 10 is greater than 4mm, so that the attenuation of heat transfer with higher temperature above the combustion chamber 1 is met, the outward transfer of heat is reduced, the temperature outside the combustion chamber 1 is reduced, meanwhile, the distance cannot be too large, and the heat insulation component 2 is prevented from being combusted under the condition that the combustion chamber 1 is fixed; similarly, the distance between the second heat insulation component 23 and the inner side wall of the body 10 is larger than 2mm, so that the attenuation of the heat outside the combustion chamber 1 is met, the heat outside is reduced, and the temperature outside the combustion chamber 1 is reduced.
In a preferred embodiment, the second extension 20 is provided with a vent 5, the vent 5 communicating with the gap 3.
In this embodiment, as shown in fig. 1, the second extending end 20 is further provided with a vent hole 5, so that heat passing through the heat insulating member 2 is taken away by the flow of air, and the temperature outside the combustion chamber 1 is reduced.
In a preferred embodiment, the ventilation holes 5 are evenly distributed at the second extension end 20.
In this embodiment, as shown in fig. 1, the uniform distribution of the ventilation holes 5 can accelerate the circulation of air, thereby more rapidly reducing the heat transferred to the air chamber after passing through the heat insulating member 2, and thus rapidly reducing the temperature outside the combustion chamber 1.
In a preferred embodiment, a plurality of insulating elements 2 are adjacent to each other or a plurality of insulating elements 2 are adjacent to each other to form an annular structure.
In this embodiment, as shown in fig. 1, 4 heat insulating members 2 are arranged to form an annular structure, so as to increase the heat insulating area between the heat insulating members 2 and the inner side wall of the combustion chamber body 10, so that an air cavity is formed between the heat insulating members 2 and the outer side wall of the combustion chamber 1, thereby improving the reduction efficiency of the outer side of the combustion chamber body 10, and the heat of the outer side of the heat insulating members 2 and the inner side wall of the combustion chamber 1 body 10 can be taken away by the flow of the low-temperature air, thereby reducing the temperature of the outer side of the combustion chamber 1.
In other embodiments, a heat insulating member 2 is fixedly disposed on the inner sidewall of the body 10 of the combustion chamber 1 for reducing the temperature of the outer sidewall of the body 10 of the combustion chamber 1 fixed thereto.
In a preferred embodiment, the heat insulating member 2 is provided with a protrusion 7, and the protrusion 7 abuts against the inner side wall of the main body 10.
In the present embodiment, as shown in fig. 1, the heat insulating member 2 is provided with the projecting portion 7, so that the gap 3 is ensured between the heat insulating member 2 and the inner side wall of the main body of the combustion chamber 1, and the existence of the gap 3 ensures that air flows in the gap, thereby reducing the temperature outside the combustion chamber 1.
In the present embodiment, the projection 7 of the heat insulating member 2 is located at the lower end of the heat insulating member 2, so that the cost of the entire heat insulating member 2 is reduced, and the space between the heat insulating member 2 and the inner side wall of the combustion chamber body 10 is ensured.
A water heater is shown in figure 5, and further comprises the combustion chamber 1.
In the present embodiment, as shown in fig. 5, the combustion chamber 1 is provided with a combustion chamber comprising a body 10 and at least one heat insulating member 2, wherein the top end of the body 10 has a first extending end 11; the top of the heat insulating member 2 has a second extending end 20, the second extending end 20 is located on the first extending end 11, and the heat insulating member 2 is located in the body 10. Set up first extension end 11 through the top of the body 10 at combustion chamber 1, heat insulating part 2 sets up the second and extends end 20, extend end 20 through the second and place in first extension end 11 top, realize that heat insulating part 2 puts on combustion chamber 1, the inside of combustion chamber 1 sets up heat insulating part 2, heat insulating part 2 separates the inside heat of combustion chamber 1 and combustion chamber 1's lateral wall, thermal outside transmission has been blocked, the high problem of outside temperature behind the coil pipe is got rid of to combustion chamber 1 has been reduced, the simple reliable practicality of this scheme is strong.
In a preferred embodiment, the lower end of the insulation 2 is flush with the upper end of the fire grate assembly 8 or the lower end of the insulation 2 is lower than the upper end of the fire grate assembly 8.
In the present embodiment, as shown in fig. 4, the lower end surface of the heat insulating member 2 is flush with the upper end of the fire grate or the lower end of the heat insulating member 2 is lower than the upper end of the fire grate assembly 8 so that the mixed gas formed by the combustion of the fire grate assembly 8 rises through the inner side surface of the heat insulating member 2.
In this embodiment, the lower extreme of heat-insulating part 2 is less than the upper end of fire row subassembly 8, and the distance that heat-insulating part 2's lower extreme stretched into fire row subassembly 8 is 3mm, has guaranteed that the air of whole water heater fully flows, has reduced the thermal loss after the burning of gas, has improved the heat exchange efficiency of whole water heater.
In a preferred embodiment, the top end of the body 10 is further provided with an upward bend, the water heater further comprises a heat exchanger 9, and the lower end surface 901 of the heat exchanger 9 is located in the upward bend of the body 10.
In this embodiment, the top end of the body 10 is further provided with an upward bend, the water heater further comprises a heat exchanger 9, the lower end face 901 of the heat exchanger 9 is located in the upward bend of the body 10, the upward bend enables the heat exchanger 9 not to generate lateral displacement, rigidity of the whole heat exchange system is improved, the lower end face 901 of the heat exchanger 9 directly exchanges heat with high-temperature flue gas generated by the combustion chamber 1, and heat exchange efficiency of the whole heat exchange system is improved.
In the present embodiment, as shown in fig. 1, 2 and 6, the upper end of the heat insulating member 2 has a third through hole 93, the top end of the body 10 has a first through hole 91, the heat exchanger has a first through hole 91, the second through hole 92 and the third through hole 93 are communicated with each other, the heat exchanger 9, the second extension end 20 and the body 10 can be connected together by bolts, the combustion chamber 1, the heat insulating member 2 and the heat exchanger 9 are fixed as a whole, the rigidity of the whole system is improved, and the heat exchange efficiency of the combustion chamber is improved.
In the embodiment, as shown in fig. 4 and 5, an air inlet is arranged below the combustion chamber 1, air below the combustion chamber 1 enters a cavity of the combustion chamber 1 through the air inlet, a part of air provides primary air for injecting fuel gas, the primary air is mixed to form mixed gas, the mixed gas is fully combusted on the fire grate assembly 8 of the combustion chamber, the other part of air entering the combustion chamber provides secondary air for combustion of the mixed gas, so that the full combustibility of the fuel gas is improved, in addition, a part of air enters the gap 3 between the heat insulation component 2 and the body 10 of the combustion chamber 1, low-temperature air passes through the inner side wall of the body 10 of the combustion chamber 1 and the outer side wall of the heat insulation component 2 to take away heat on the inner side wall of the body 10 of the combustion chamber 1 and the outer side wall of the heat insulation component 2, and the problem of the inner side wall of the body 10 of the combustion chamber 1 and the outer side wall of the heat insulation component 2 is solved, meanwhile, the heated air is subjected to sufficient heat exchange with the heat exchanger 9 through the vent holes 5 on the second extension end 20, so that the utilization rate of the gas of the whole water heater is improved, and the temperature of the outer side of the combustion chamber 1 body 10 is reduced.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (12)
1. A combustion chamber, characterized in that it comprises:
a body;
at least one heat insulation component which is fixed on the inner side wall of the top end of the body;
the heat insulation component and the inner side wall of the body have a gap, the heat insulation component comprises a first heat insulation component and a second heat insulation component, the first heat insulation component is positioned above the second heat insulation component, and the distance between the first heat insulation component and the inner side wall of the body is larger than the distance between the second heat insulation component and the inner side wall of the body.
2. The combustor of claim 1, wherein said first thermal shield member is spaced from said body inner sidewall by a distance greater than 4 mm; the distance from the second heat insulation component to the inner side wall of the body is larger than 2 mm.
3. The combustor of claim 1, wherein the top end of said body has a first extended end and the top of said thermal shield member has a second extended end, said second extended end being located on said first extended end.
4. The combustion chamber of claim 3 wherein said second extended end is provided with a vent hole, said vent hole communicating with said gap.
5. The combustion chamber of claim 4 wherein said ventilation holes are evenly distributed in said second extended end.
6. The combustor of claim 1, wherein a plurality of said thermal insulating members are adjacent to each other or a plurality of said thermal insulating members are adjacent to each other to form an annular structure.
7. The combustion chamber as claimed in claim 1, wherein the heat insulating member is provided with a projection portion which abuts against an inner side wall of the body.
8. The combustor of claim 7, wherein said combustor projection is located at a lower end of said thermal insulating member.
9. A water heater characterized in that it comprises a combustion chamber according to any one of claims 1 to 8.
10. The water heater according to claim 9, further comprising a fire grate assembly located at the bottom of the combustion chamber, wherein the lower end of the thermal insulation member is flush with the upper end of the fire grate assembly or the lower end of the thermal insulation member is lower than the upper end of the fire grate assembly.
11. The water heater as recited in claim 9 further comprising a heat exchanger, the top end of the body having an upward bend, the lower end surface of the heat exchanger being located within the upward bend of the body.
12. The water heater according to claim 11, wherein said heat exchanger further comprises a first through hole, said body comprises a second through hole, said insulating member comprises a third through hole, said first through hole, said second through hole and said third through hole are connected and fastened by the same fastening member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122370305.XU CN216814644U (en) | 2021-09-27 | 2021-09-27 | Combustion chamber and water heater comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122370305.XU CN216814644U (en) | 2021-09-27 | 2021-09-27 | Combustion chamber and water heater comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216814644U true CN216814644U (en) | 2022-06-24 |
Family
ID=82040205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122370305.XU Active CN216814644U (en) | 2021-09-27 | 2021-09-27 | Combustion chamber and water heater comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216814644U (en) |
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2021
- 2021-09-27 CN CN202122370305.XU patent/CN216814644U/en active Active
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