CN206469470U - Gas heater - Google Patents
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- CN206469470U CN206469470U CN201621489819.XU CN201621489819U CN206469470U CN 206469470 U CN206469470 U CN 206469470U CN 201621489819 U CN201621489819 U CN 201621489819U CN 206469470 U CN206469470 U CN 206469470U
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- combustion
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Abstract
The utility model discloses a kind of gas heater, the gas heater includes shell and blower fan, water circuit system and combustion system with the cage connection, the combustion system is included located at combustion chamber, the water cooled burner in combustion chamber and the exhaust passage for connecting top of combustion chamber of enclosure, and the blower fan is located at the lower section of combustion chamber；The water circuit system includes the heat exchanger of water inlet pipe, outlet pipe and connection water inlet pipe and outlet pipe, and the heat exchanger is placed in the top of combustion chamber；The primary air ratio of the water cooled burner is 1.6 to 1.8.The utility model reduces the flue gas of water cooled burner burning generation in the residence time of high-temperature region, so as to effectively suppress NOx generations, greatly reduces the discharge of gas heater pernicious gas, makes gas heater more environmentally-friendly.
Description
Technical field
The utility model is related to technical field of water heaters, more particularly to a kind of gas heater.
Background technology
Domestic gas-fired water heater industry is developed rapidly, but is due to produce a large amount of pernicious gas CO and NOx in fuel gas buring,
Environmental and human health impacts are caused with great harm, and is had been reported that during the thing of gas poisoning, the safety problem of water heater
All the time it is the problem of people need concern.
Existing environmental-protection gas water heater is directly from outdoor suction combustion air and forced the flue gas row produced of burning
To outdoor, although this mode can solve safety problem, the pernicious gas NOx arranged into outdoor flue gas is excessive, to ring
Border causes pollution.
Utility model content
Main purpose of the present utility model is to provide a kind of gas heater, it is intended to which solving existing gas heater has
Evil gas discharges excessive technical problem.
To achieve the above object, a kind of gas heater that the utility model is provided, the gas heater includes shell
And blower fan, water circuit system and combustion system with the cage connection, combustion of the combustion system including being located at enclosure
Room, the water cooled burner in combustion chamber and the exhaust passage for connecting top of combustion chamber are burnt, the blower fan is located at combustion chamber
Lower section；The water circuit system includes the heat exchanger of water inlet pipe, outlet pipe and connection water inlet pipe and outlet pipe, and the heat exchanger is put
Top in combustion chamber；The primary air ratio of the water cooled burner is 1.6 to 1.8.
Preferably, the nozzle of the water cooled burner is uprightly set, in the combustion chamber water cooled burner and heat exchanger it
Between leave and draw the upright space that ejaculation of flame passes through for nozzle.
Preferably, the nozzle is premixing nozzle, the premix chamber of premixing nozzle air channel respectively with the blower fan and combustion
The blast tube connection of gas water heater.
Preferably, the premix chamber of the premixing nozzle is alumiaum article or copper fitting.
Preferably, the water circuit system also includes the cooling water pipe connected with water inlet pipe, and the cooling water pipe passes through water cooling
Burner to the water cooled burner to cool.
Preferably, the water cooled burner includes multiple fire rows being set up in parallel, and each fire row is provided with fin, described
Cooling water pipe is fitted setting with fin.
Preferably, the gas heater also includes the catalyst reaction device for being arranged at exhaust gases passes above combustion chamber, institute
State the catalytic substance with catalysis CO burnings on catalyst reaction device.
Preferably, the catalyst reaction device is attached at heat exchanger outer layer.
Preferably, the catalyst reaction device is grid part, and grid part is provided with crosses gas passage through the grid part.
Preferably, the catalytic substance of catalysis CO burnings is scribbled in the vias inner walls for crossing gas passage.
Preferably, the exhaust passage includes exhaust fume collecting hood, and exhaust fume collecting hood button is located at top of combustion chamber, exhaust fume collecting hood relative combustion room
Side offer gas outlet.
The utility model is by the way that by water cooled burner setting and combustion chamber, blower fan supplies air to combustion chamber, so that water
The primary air ratio of cold burner is 1.6 to 1.8, the combustion gas that water cooled burner sprays is reached full premix combustion state, is fired
The flame of gas only has internal flame burning, and flame height only has 50% that normal atmospheric formula is burnt；Without flame envelope burning, more than 1000 DEG C
High-temperature region shortens more than 70%, the height reduction of whole combustion chamber 30%, therefore water cooled burner is by shortening high-temperature region,
The flue gas of water cooled burner burning generation is reduced in the residence time of high-temperature region, so as to effectively suppress NOx generations, is greatly reduced
The discharge of gas heater pernicious gas, makes gas heater more environmentally-friendly.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the utility model gas heater one.
Drawing reference numeral explanation：
| Shell 1 | Blower fan 2 | Combustion chamber 31 | Water cooled burner 32 |
| Exhaust passage 33 | Gas outlet 331 | Water inlet pipe 41 | Outlet pipe 42 |
| Heat exchanger 43 | Water intaking valve 411 | Outlet valve 421 | Current tactility apparatus 412 |
| Water proportioning valve 413 | Blast tube 5 | Gas ratio valve 51 | Catalyst reaction device 6 |
| Blast switch 7 | Controller 8 |
Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment is described further with regard to the technical solution of the utility model.It should manage
Solution, specific embodiment described herein only to explain the utility model, is not used to limit the utility model.
In description of the present utility model, it is to be understood that the orientation or position of the instruction such as term " on ", " under " " transverse direction "
It is, based on orientation shown in the drawings or position relationship, to be for only for ease of description the utility model and simplify description to put relation, and
It is not instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore
It is not intended that to limitation of the present utility model.In addition, term " first ", " second " " the 3rd ", " the 4th " " the 5th ", " the 6th "
The purpose of description is only used for, without being understood that the importance for indicating or implying.
To be best understood from the utility model, provide a kind of gas heater herein, gas heater include shell 1 and with
Blower fan 2, water circuit system and combustion system that shell 1 is connected, combustion system is including being located at the combustion chamber 31 inside shell 1, being located at
Water cooled burner 32 and the exhaust passage 33 for connecting the top of combustion chamber 31 in combustion chamber 31, blower fan 2 are located under combustion chamber 31
Side；Water circuit system includes the heat exchanger 43 of water inlet pipe 41, outlet pipe 42 and connection water inlet pipe 41 and outlet pipe 42, heat exchanger 43
It is placed in the top of combustion chamber 31；The primary air ratio of water cooled burner 32 is 1.6 to 1.8.
The shell 1 of gas heater is generally metal shell 1, and blower fan 2, water circuit system and combustion system are wrapped in into it
In, combustion system includes combustion chamber 31, water cooled burner 32 and exhaust passage 33, and combustion chamber 31 may be disposed at the middle part of shell 1,
The bottom of combustion chamber 31 is provided with water cooled burner 32, and the top of combustion chamber 31 is provided with the exhaust passage 33 being in communication with the outside,
Combustion chamber 31 is the space of a relative closure, and water cooled burner 32 is connected with the blast tube 5 of gas heater, blast tube
Gas ratio valve 51 is provided with 5 air inlet, the gas ratio valve 51 is used to control gas flow.
Water cooled burner 32 uses the number that nozzle quantity in the case of upright structures, and equal-wattage is ordinary burner
Times, specifically, the nozzle (not shown) of water cooled burner 32 is uprightly set, water cooled burner 32 and heat exchange in combustion chamber 31
Left between device 43 and draw the upright space that ejaculation of flame passes through for nozzle, the flame and flame combustion air-flow that nozzle sprays be also
Uprightly sprayed in combustion chamber 31, so that gas-flow resistance is small, the air of injection is more.
Blower fan 2 be located at shell 1 bottom, i.e., blower fan 2 be located at combustion chamber 31 lower section, be easy to blower fan 2 introduce air-flow by
The bottom of combustion chamber 31 is blown into, and is easy to flame and flame combustion air-flow uprightly to be sprayed in combustion chamber 31；In addition gas heater is also
Blast switch 7 is provided with, the blast switch 7 is used to control blower fan 2 to run.Certainly, blower fan 2 can also be directly to water cooled burner
Air needed for 32 supply burnings.
Water circuit system includes setting the water inlet pipe 41 and outlet pipe 42 with the bottom of shell 1, and heat exchanger 43, and current are successively
By water inlet pipe 41, heat exchanger 43 and outlet pipe 42, the porch of water inlet pipe 41 is provided with water intaking valve 411, and outlet pipe 42 goes out
Outlet valve 421 is provided with mouthful, in addition, the water flow sensor 412 for testing flow of inlet water also can be set on water inlet pipe 41
With the water proportioning valve 413 for adjusting flow of inlet water, so as to be realized by gas ratio valve and water proportioning valve to gas heater
Aqueous vapor it is double adjust, constant-temperature precision is higher, and bathing is more comfortable.
Heat exchanger 43 is arranged on the top of combustion chamber 31 in bending pipeline structure, when water cooled burner 32 lights burning,
Heat exchange is carried out with the ejaculation of flame of water cooled burner 32 when flowing water flows through heat exchanger 43, temperature is uprised so that cold water is because of heat absorption,
Hot water after temperature is uprised is discharged by outlet pipe 42.
Primary air ratio is：The ratio between air capacity and theoretical air of the mixing of advance and coal gas, once empty in the burner
The numerical values recited of gas coefficient reflects the troubled water of premixed gas；Such as primary air ratio is 1.6 to 1.8, that is to say, that
The amount of primary air is that combustion gas is burnt 1.6 times to 1.8 times of required air quantity completely.Blower fan 2 is that water cooled burner 32 supplies sky
Gas, so that the primary air ratio of water cooled burner 32 is 1.6 to 1.8.In addition, gas heater also includes controller 8, control
Device 8 is electrically connected with blast switch 7, water flow sensor, blower fan 2, gas ratio valve, water proportioning valve respectively, so that controller 8
Controllable air capacity, gas supply amount, cold feed amount that blower fan 2 is switched, blower fan 2 is supplied to combustion chamber 31 etc..Specifically, control
Device 8 processed is according to the supply flow (can be obtained by gas ratio valve) of blast tube 5, so that needed for learning combustion gas burning completely
Air capacity, then controller control rotation speed of fan with to gas heater provide 1.6 times to 1.8 times complete combustion air amounts sky
Gas, wherein air capacity of the combustion gas of supply flow of the air of complete combustion air amount for blast tube 5 completely needed for burning.
In the present embodiment, by the way that water cooled burner 32 is set and in combustion chamber 31, blower fan 2 supplies sky to combustion chamber 31
Gas, so that the primary air ratio of water cooled burner 32 is 1.6 to 1.8, the combustion gas for spraying water cooled burner 32 reaches complete pre-
Mixed fired state, the flame of combustion gas only has internal flame burning, and flame height only has 50% that normal atmospheric formula is burnt；Without flame envelope combustion
Burn, more than 1000 DEG C of high-temperature region shortens more than 70%, the height reduction of whole combustion chamber 31 30%, therefore water cooling burning
Device 32 reduces the flue gas of the burning generation of water cooled burner 32 in the residence time of high-temperature region, so that effectively by shortening high-temperature region
Suppression NOx generation, greatly reduce the discharge of gas heater pernicious gas, make gas heater more environmentally-friendly.In addition, by
Greatly reduced in gas heater noxious gas emission, avoid the need for forcing delaying all to arrange to outdoor, combustion is alleviated significantly
Gas water heater uses the position limitation installed.
Further, the cold water burner nozzle of gas heater is premixing nozzle, and premixing nozzle, which has, to be used to mix sky
Gas and the premix chamber of combustion gas, the premix chamber are connected with the air channel of blower fan 2 and the blast tube 5 of gas heater respectively, so that wind
Machine 2 directly supplies air to premix chamber, and blast tube 5 supplies combustion gas to premix chamber, by controller 8 to blower fan 2 and combustion gas ratio
Example valve is controlled, and the primary air ratio for making water cooled burner 32 is 1.6 to 1.8, so as to be realized with a kind of simple structure
Adjustment to the primary air ratio of water cooled burner 32.
Alternatively, the premix chamber of premixing nozzle is alumiaum article or copper fitting.Due to alumiaum article and copper fitting thermal conductivity very
It is good, it is easy to premixing nozzle or premix chamber quick heat radiating, it is to avoid tempering phenomenon occurs in water cooled burner 32.In addition, being based on being produced into
This considers with heat conductivility, and the premix chamber of premixing nozzle can be using the splendid and moderate red copper part of thermal conductivity.
Alternatively, water circuit system also includes the cooling water pipe connected with water inlet pipe 41, and cooling water pipe passes through water cooled burner
32 to the water cooled burner 32 to cool, it is preferable that cooling water pipe is wrapped in the premix chamber surface of premixing nozzle, cold water stream
Through cooling water pipe with to premix chamber progress fast cooling.Due to the primary air ratio of water cooled burner 32 reached more than 1.2 and
When the surface temperature of water cooled burner 32 reaches more than 200 DEG C, tempering phenomenon is easily produced, is now uniquely set for water cooled burner 32
Cooling water pipe has been counted, while burner is cooled down using cold water as premix cavity material using the splendid red copper of thermal conductivity,
The surface temperature of water cooled burner 32 is dropped to less than 100 DEG C, not only reduce ignition temperature, NOx emission is reduced, while effectively
Tempering phenomenon is prevented, the stability of burning is kept.
In addition, the water cooled burner includes multiple fire rows being set up in parallel, each fire row is provided with fin, described cold
But water pipe is fitted setting with fin.Water cooled burner includes multiple fire rows arranged side by side, and the both sides up and down of each fire row are set respectively
There is a fin, and the upper radiating mounting hole of coaxial line is respectively equipped with the fin on the upside of each fire row, on the fin of downside
Be respectively equipped with the lower radiating mounting hole of coaxial line, the both sides of each upper radiating mounting hole are respectively equipped with the bulge loop of annular, it is each under
The both sides of radiating mounting hole are respectively equipped with the bulge loop of annular, and upper radiating mounting hole and lower radiating mounting hole pass through every provided with one end
The cooling water pipe of individual upper radiating mounting hole, the other end through each lower radiating mounting hole.Bulge loop is effectively increased cooling water pipe
Heat transfer effect between fin.Fire row is in flat horn-like structure close to its part for going out fire end, and this structure was both
The space of water cooled burner can be accomplished to save, the radiating effect of water-filled radiator can be effectively improved again, flare can be
Go out fire end uniformly to scatter, while the heat for passing to fin is also most, fin is located at the fire in flat horn-like structure
On row.
Further, gas heater also includes the catalyst reaction device 6 for being arranged at the top exhaust gases passes of combustion chamber 31, urges
Change the catalytic substance with catalysis CO burnings on reaction unit 6.So as to which water cooled burner 32 burns the high-temperature flue gas produced with urging
Change the catalytic substance contact on reaction unit 6, so that the CO in flue gas is combined life by catalysed oxidn with the O2 in air
Discharged after into non-toxic gas such as CO2, key reaction chemical equation：2CO+O2=2CO2, so as to reduce CO content in smoke, carry
High discharge standard, reduce pollution to environment；More particularly, CO oxidation reactions are an exothermic process, i.e., in flue gas
CO under catalytic substance effect fully burning to generate heat energy, used for gas heater heating, improve water heater plus
The thermal efficiency, reduces gas consumption.
Alternatively, catalyst reaction device 6 can partly be attached at the outer layer of heat exchanger 43, i.e. catalyst reaction device 6 and can wind, pacify
Fill, be fastened on the outer layer of heat exchanger 43, what the ejaculation of flame of water cooled burner 32 and the flue gas heat exchanging device 43 produced were heated
Meanwhile, also catalyst reaction device 6 is heated to reach CO catalytic oxidation temperature, it is ensured that CO catalytic oxidations are smooth
Carry out.
Alternatively, catalyst reaction device 6 is grid part, and grid part is provided with crosses gas passage through the grid part.Grid
Part can be Turbogrid plates, the bearing of trend for crossing gas passage of grid part and the upright bearing of trend one of the nozzle of water cooled burner 32
Cause, thus ensure nozzle jet out flames and burn generate flue gas smoothly lead to exhaust passage 33 on the premise of, make catalytic reaction
The contact area of device 6 and flame, high-temperature flue gas is as big as possible, catalyst reaction device 6 is stablized heated, it is ensured that CO is catalyzed
Oxidation reaction is smoothed out.Preferably, the catalytic substance of catalysis CO burnings is scribbled in the vias inner walls for crossing gas passage, is improved tactile
The contact area of matchmaker's material and the high-temperature flue gas containing CO, is more beneficial for CO catalytic oxidations and is smoothed out, so as to fire
The CO of gas water heater, NOx emission are controlled within 20ppm.
Further, exhaust passage 33 includes exhaust fume collecting hood, and exhaust fume collecting hood button is located at the top of combustion chamber 31, exhaust fume collecting hood relative combustion
The side of room 31 offers gas outlet 331, and exhaust fume collecting hood is gathered the flue gas carried out with heat exchanger 43 after heat exchange and from outlet
Mouthfuls 331 discharge, and realize the drainage and aggregation to flue gas, and the flue gas for being conducive to gas heater to produce is quick, in an orderly manner from shell 1
Inside discharge.
In addition, CO alarms can be set up at gas outlet 331, remind user CO whether exceeded with this, protect the life of user
Life safety.
The utility model also provides a kind of gas heater method for controlling combustion based on above-mentioned gas heater, this method
Including：
Obtain the current gas flow of gas ratio valve；
According to current gas flow, complete combustion air amount of the combustion gas completely needed for burning under current gas flow is obtained；
According to complete combustion air amount and target primary air ratio, control rotation speed of fan to water cooled burner to provide pair
Answer the air of air capacity.
The controller of gas heater gathers the opening degree of current gas proportioning valve, and obtains combustion gas according to the opening degree and lead to
The current gas flow in road；Then the gaseous species and gas combustion chemistry formula of combustion gas are used according to gas heater, are obtained
Amount of oxygen of the one unit volume combustion gas completely needed for burning, and then the amount of oxygen under current gas flow needed for combustion gas is drawn, most
The air capacity needed for combustion gas under current gas flow is obtained eventually, that is, is got needed for combustion gas is burnt completely under current gas flow
Complete combustion air amount；Further according to complete combustion air amount and target primary air ratio (such as target primary air of the acquisition
Coefficient is 1.6 to 1.8), obtain the rotating speed of target of fan of gas water heater, so as to control blower fan to be worked with rotating speed of target, with to
Water cooled burner provides the air of correspondence air capacity, so that the combustion gas that water cooled burner 32 sprays reaches full premix combustion shape
State, the flame of combustion gas only has internal flame burning, and flame height only has 50% that normal atmospheric formula is burnt；Without flame envelope burning, 1000 DEG C
More than high-temperature region shorten more than 70%, the height reduction of whole combustion chamber 31 30%, therefore water cooled burner 32 passes through
Shorten high-temperature region, the flue gas of the burning generation of water cooled burner 32 is reduced in the residence time of high-temperature region, so as to effectively suppress NOx
Generation, greatly reduces the discharge of gas heater pernicious gas, makes gas heater more environmentally-friendly.
It should be noted that the technical scheme of each embodiment of the present utility model can be combined with each other, but must be
Basis can be implemented as with those skilled in the art, should when the combination appearance of technical scheme is conflicting or can not realize
People thinks that the combination of this technical scheme is not present, also not within the protection domain of the utility model requirement.
Preferred embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited,
The equivalent structure transformation that every utilization the utility model specification and accompanying drawing content are made, or directly or indirectly it is used in other phases
The technical field of pass, is similarly included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of gas heater, it is characterised in that the gas heater includes shell and the wind with the cage connection
Machine, water circuit system and combustion system, the combustion system are included located at the combustion chamber of enclosure, the water cooling in combustion chamber
Burner and the exhaust passage for connecting top of combustion chamber, the blower fan are located at the lower section of combustion chamber；The water circuit system include into
The heat exchanger of water pipe, outlet pipe and connection water inlet pipe and outlet pipe, the heat exchanger is placed in the top of combustion chamber；The water cooling
The primary air ratio of burner is 1.6 to 1.8.
2. gas heater as claimed in claim 1, it is characterised in that the nozzle of the water cooled burner is uprightly set, institute
State to leave between water cooled burner and heat exchanger in combustion chamber and draw the upright space that ejaculation of flame passes through for nozzle.
3. gas heater as claimed in claim 2, it is characterised in that the nozzle is premixing nozzle, the premixing nozzle
Premix chamber is connected with the air channel of the blower fan and the blast tube of gas heater respectively.
4. gas heater as claimed in claim 3, it is characterised in that the premix chamber of the premixing nozzle is alumiaum article or copper
Product.
5. the gas heater as described in Claims 1-4 any one, it is characterised in that the water circuit system also include with
The cooling water pipe of water inlet pipe connection, the cooling water pipe passes through water cooled burner to cool to the water cooled burner.
6. gas heater as claimed in claim 5, it is characterised in that the water cooled burner includes multiple be set up in parallel
Fire row, each fire row is provided with fin, and the cooling water pipe is fitted setting with fin.
7. the gas heater as described in Claims 1-4 any one, it is characterised in that the gas heater also includes
It is arranged at the catalyst with catalysis CO burnings on the catalyst reaction device of exhaust gases passes above combustion chamber, the catalyst reaction device
Material.
8. gas heater as claimed in claim 7, it is characterised in that the catalyst reaction device is grid part, grid part
It is provided with and crosses gas passage through the grid part.
9. gas heater as claimed in claim 8, it is characterised in that scribble catalysis in the vias inner walls for crossing gas passage
The catalytic substance of CO burnings.
10. gas heater as claimed in claim 1, it is characterised in that the exhaust passage includes exhaust fume collecting hood, exhaust fume collecting hood button
Located at top of combustion chamber, the side of exhaust fume collecting hood relative combustion room offers gas outlet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621489819.XU CN206469470U (en) | 2016-12-30 | 2016-12-30 | Gas heater |
| PCT/CN2017/079131 WO2018120480A1 (en) | 2016-12-30 | 2017-03-31 | Gas-fired water heater and gas-fired water heater combustion control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621489819.XU CN206469470U (en) | 2016-12-30 | 2016-12-30 | Gas heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206469470U true CN206469470U (en) | 2017-09-05 |
Family
ID=59712423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621489819.XU Active CN206469470U (en) | 2016-12-30 | 2016-12-30 | Gas heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206469470U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895668A (en) * | 2018-07-25 | 2018-11-27 | 东阳市燃气有限公司 | A kind of domestic gas-fired water heater and its implementation |
| CN110530030A (en) * | 2019-09-09 | 2019-12-03 | 广东长青（集团）股份有限公司 | A kind of burner and water heater |
| CN112682781A (en) * | 2019-10-17 | 2021-04-20 | 芜湖美的厨卫电器制造有限公司 | Combustor and gas water heater |
| CN114353071A (en) * | 2020-09-30 | 2022-04-15 | 芜湖美的厨卫电器制造有限公司 | Combustor and gas water heater |
-
2016
- 2016-12-30 CN CN201621489819.XU patent/CN206469470U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895668A (en) * | 2018-07-25 | 2018-11-27 | 东阳市燃气有限公司 | A kind of domestic gas-fired water heater and its implementation |
| CN110530030A (en) * | 2019-09-09 | 2019-12-03 | 广东长青（集团）股份有限公司 | A kind of burner and water heater |
| CN110530030B (en) * | 2019-09-09 | 2024-02-13 | 长青热能科技(中山)有限公司 | Combustor and water heater |
| CN112682781A (en) * | 2019-10-17 | 2021-04-20 | 芜湖美的厨卫电器制造有限公司 | Combustor and gas water heater |
| CN112682781B (en) * | 2019-10-17 | 2022-11-29 | 芜湖美的厨卫电器制造有限公司 | Combustor and gas water heater |
| CN114353071A (en) * | 2020-09-30 | 2022-04-15 | 芜湖美的厨卫电器制造有限公司 | Combustor and gas water heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220908 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 241009 Wan Chun East Road, East District, Wuhu economic and Technological Development Zone, Anhui Patentee before: WUHU MIDEA KITCHEN AND BATH APPLIANCES MFG. Co.,Ltd. |
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| TR01 | Transfer of patent right |