CN111442522A - Gas water heater - Google Patents
Gas water heater Download PDFInfo
- Publication number
- CN111442522A CN111442522A CN202010257773.3A CN202010257773A CN111442522A CN 111442522 A CN111442522 A CN 111442522A CN 202010257773 A CN202010257773 A CN 202010257773A CN 111442522 A CN111442522 A CN 111442522A
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- air
- gas
- water heater
- flow path
- air flow
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/107—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/02—Casings; Cover lids; Ornamental panels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
Abstract
The invention discloses a gas water heater, which comprises a shell, a heat exchanger and a burner, wherein a combustion chamber is formed in the shell, the heat exchanger is positioned in a heat exchange area of the combustion chamber, and the burner is positioned in a combustion area of the combustion chamber. The mixed gas of gas and air is burned at the burner, and the generated high-temperature flue gas flows to the heat exchange area. The gas water heater further includes a film generating mechanism having an air flow path passing through the combustion chamber, the air flow path being formed on an inner wall surface of the housing. The air film generating mechanism drives air to generate airflow in the air flow passage, the airflow flows along the inner wall of the cooling shell to take away heat of the shell, and meanwhile, condensed water condensed on the inner wall of the shell can be taken away, so that the shell is thoroughly prevented from being corroded due to the combination of the condensed water and smoke. Because the flowing direction of the airflow in the air flowing channel is the same as the flowing direction of the fuel gas, the heated air finally flows to the heat exchanger for heat exchange, and energy is not wasted.
Description
Technical Field
The invention relates to the field of water heaters, in particular to a gas water heater.
Background
Fig. 1 shows a structure widely used in a gas water heater at present. The gas water heater has at least a combustion chamber 1 'in which gas is combusted, and a heat exchanger 2' capable of heating water flowing through the heat exchanger 2 'by using high-temperature flue gas generated in the combustion chamber 1'. The cooling fins 21 ' of the heat exchanger 2 ' and the water flow in the heat exchange tubes 22 ' of the heat exchanger 2 ' can reduce the wall temperature of the heat exchanger 2 ' in the area. And the wall surface of the combustion chamber 1 ' is provided with a coil 3 ', and the wall surface of the combustion chamber 1 ' is cooled by the water flow in the coil 3 ' and the coil 3 '. Because the temperature difference between the water flow in the coil pipe 3 'and the high-temperature flue gas in the combustion chamber 1' is large, when the combustion chamber burns in a small load state, water drops are easily condensed in the wall surface area of the combustion chamber 1 'which is in contact with the coil pipe 3' and absorb acid gas in the flue gas, so that the wall surface is corroded.
Disclosure of Invention
The invention aims to overcome the defect that the wall surface of a combustion chamber of a gas water heater in the prior art is easy to corrode, and provides a gas water heater.
The invention solves the technical problems through the following technical scheme:
the utility model provides a gas water heater, its includes casing, heat exchanger and combustor, form a combustion chamber in the casing, heat exchanger set up in combustion chamber's heat transfer is regional, the combustor set up in combustion chamber's combustion region is interior, gas water heater still includes air film generating mechanism, air film generating mechanism has the air flow path who flows through combustion chamber, air flow path form in the inner wall surface of casing, air film generating mechanism drive air is in flow to along the gas flow direction in the air flow path heat transfer is regional.
In this scheme, adopt above-mentioned structural style, the air current is produced in the air flow path to mechanism's drive air is taken place to the air film, and the air current flows in order to take away the heat of casing through the inner wall along cooling the casing, also can take away the comdenstion water that condenses at shells inner wall simultaneously to thoroughly avoid comdenstion water and flue gas to combine and corrode the casing. Because the flowing direction of the airflow in the air flowing channel is the same as the flowing direction of the fuel gas, the heated air finally flows to the heat exchanger for heat exchange, and energy is not wasted.
Preferably, a fan is arranged in the air flow passage and used for driving air to flow along the air flow passage.
In this scheme, adopt above-mentioned structural style, utilize the fan to make the air get into in the air flow path to make the air flow along the gas flow direction.
Preferably, the fan is provided at the beginning of the air flow path, and the fan is a blower.
In this scheme, adopt above-mentioned structural style, the air-blower can blow the beginning that air got into the air flow passageway, realizes the purpose that the air flows in the air flow passageway in order to cool off the casing.
Preferably, the beginning of the air flow path coincides with the secondary air channel of the burner, and the fan is further configured to drive the air to flow along the secondary air channel.
In this scheme, adopt above-mentioned structural style, coincide the secondary air passageway with the top of air flow path and combustor for the fan had both driven outside air and had flowed in air flow path, realized the purpose of cooling the casing, and the drive outside air flows into the combustor again and helps the burning as secondary air, has driven cooling gas and secondary air simultaneously in the same as the fan, can effectively reduce the part quantity in the gas heater.
Preferably, the fan is disposed at an end of the air flow passage, the fan being a suction fan.
In this scheme, adopt above-mentioned structural style, the air exhauster can be followed the terminal extraction of air flow path to realize the effect that the drive air flows in air flow path.
Preferably, the end of the air flow passage coincides with the smoke exhaust channel of the heat exchange area, and the fan is further used for driving smoke to be exhausted from the combustion chamber.
In this scheme, adopt above-mentioned structural style, the fan drives the air flow in the air flow path simultaneously, drives the flue gas again and discharges from combustion chamber, can effectively reduce the part quantity in the gas heater.
Preferably, the starting end of the air flow path has an air inlet for the air from the outside to enter the combustion chamber, and the air inlet is communicated with the air flow path.
In this scheme, adopt above-mentioned structural style, under the drive of fan, during the outside air passes through the air inlet and gets into the air flow path, the realization is to the cooling of casing.
Preferably, the air flow path of the air film generating mechanism includes a through hole opened in a side wall of the housing, and the air film generating mechanism further includes a guide plate disposed inside the housing, and the guide plate is configured to guide the air to flow in the gas flow direction after the air flows out from the through hole.
In this scheme, adopt above-mentioned structural style, the air passes through the inboard that the through-hole got into the casing, and under the water conservancy diversion effect of guide plate, the air flows along the gas flow direction to make the air can flow along the inner wall of casing, guarantee the cooling effect of casing.
Preferably, the through-hole has set gradually the multirow along the gas flow direction, the guide plate is provided with a plurality ofly, each the guide plate corresponds one of them row respectively the through-hole sets up.
In this scheme, adopt above-mentioned structural style, through setting up multirow through-hole for each part of casing inboard can both contact external low temperature air, has improved the cooling effect. The plurality of guide plates are arranged, so that cooling air can flow along the shell wall as far as possible, and the guide plates are correspondingly arranged on each row of through holes, so that air entering from each through hole can flow along the flowing direction of fuel gas under the action of the guide plates.
Preferably, the guide plate includes a first guide portion connected to the housing and a second guide portion away from the housing, the first guide portion has a J-shaped cross section for changing the air flowing direction, and the second guide portion has an I-shaped cross section for guiding the air to maintain the gas flowing direction.
In this scheme, adopt above-mentioned structural style, after the air got into the casing inside through the through-hole, the air was at first contacted with the first water conservancy diversion of J type for the flow direction of air becomes to be the same with the gas flow direction, and later under the guide of the second water conservancy diversion of I type portion, the air is keeping the gas flow direction to flow.
Preferably, a gap between the second flow guide portion and an inner wall surface of the housing is provided for the air to flow.
In this scheme, adopt above-mentioned structural style, the air passes through the space between second water conservancy diversion portion and the casing inner wall for the air keeps the gas flow direction to flow.
Preferably, the burner and the housing are connected by a connecting portion, the air flow path of the film generating mechanism includes a cooling hole opened on a surface of the connecting portion, and an opening direction of the cooling hole is arranged toward an inner wall surface of the housing.
In this scheme, adopt above-mentioned structural style, connecting portion make can firm connection between combustor and the casing, and the cooling hole that connecting portion were seted up makes air flow path keep unblocked, and the air can smoothly flow in air flow path in order to cool off, and because the internal face setting of cooling hole orientation casing, therefore external air can directly blow to the inside wall face for the cooling effect is better.
Preferably, the gas water heater further includes a cooling wall disposed around the burner, a gap between the cooling wall and the housing forming the air flow passage to separate the air flow passage from a gas flow passage within the combustion chamber.
In this scheme, adopt above-mentioned structural style, the air flow path who forms between stave and the casing is comparatively closed, guarantees that the air can flow along the inner wall of casing to reach better cooling effect, the stave can make and keep apart relatively between combustor and the casing moreover, makes the casing be heated less, thereby further restraines the casing temperature and risees.
Preferably, the air film generating mechanism drives the air to flow through the heat exchange area after flowing through the combustion area.
In this scheme, adopt above-mentioned structural style, the air can participate in the burning in the combustion area to constitute secondary air, no matter whether the air that mechanism drive was taken place to the air film participates in the burning, these gas finally all can flow to the heat transfer region, make the energy can not be extravagant.
The positive progress effects of the invention are as follows:
this gas heater's air film generating mechanism drive air produces the air current in the air flow passageway, and the air current flows in order to take away the heat of casing through the inner wall along cooling housing, also can take away the comdenstion water that condenses at shells inner wall simultaneously to thoroughly avoid comdenstion water and flue gas to combine and corrode the casing. Because the flowing direction of the airflow in the air flowing channel is the same as the flowing direction of the fuel gas, the heated air finally flows to the heat exchanger for heat exchange, and energy is not wasted.
Drawings
Fig. 1 is a schematic diagram of the internal structure of a gas water heater in the prior art.
Fig. 2 is a schematic view of the internal structure of a gas water heater according to embodiment 1 of the present invention.
Fig. 3 is an enlarged schematic view at a of fig. 2.
Fig. 4 is an exploded schematic view of a gas water heater according to embodiment 1 of the present invention.
Fig. 5 is an enlarged schematic view at B of fig. 4.
Fig. 6 is a schematic view of the internal structure of a gas water heater according to embodiment 2 of the present invention.
Fig. 7 is an exploded schematic view of a gas water heater according to embodiment 2 of the present invention.
Description of reference numerals:
Prior Art
Combustion Chamber 1'
Heat exchanger 2'
Cooling fin 21'
Heat exchange tube 22'
Coil pipe of 3'
The invention
Through-hole 11
First flow guide part 121
Second flow guide part 122
Beginning 41
Cooling hole 81
Stave 9
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
Fig. 2 to 5 show a gas water heater according to embodiment 1 of the present invention. In the present embodiment, the gas water heater includes a housing 1, a heat exchanger 2 and a burner 3, wherein a combustion chamber 10 is formed in the housing 1, the heat exchanger 2 is disposed in a heat exchange region 120 of the combustion chamber 10, and the burner 3 is disposed in a combustion region 110 of the combustion chamber 10. The mixed gas of gas and air is burned at the burner 3, and the generated high-temperature flue gas flows to the heat exchange area 120 and exchanges heat with the heat exchanger 2.
The gas water heater further includes a film generating mechanism having an air flow path 4 passing through the combustion chamber 10, the air flow path 4 being formed on an inner wall surface of the housing 1, the film generating mechanism driving air to flow in a gas flow direction within the air flow path 4 to the heat exchanging region 120. The air film generating mechanism drives air to generate air flow in the air flow passage 4, the air flow flows along the inner wall of the cooling shell 1 to take away heat of the shell, and meanwhile, condensed water condensed on the inner wall of the shell can be taken away, so that the shell is thoroughly prevented from being corroded due to the combination of the condensed water and smoke. Since the flow direction of the air flow in the air flow passage 4 is the same as the flow direction of the gas, the heated air finally flows to the heat exchanger 2 to exchange heat, and energy is not wasted.
And the gas heater of this embodiment need not to use the coil pipe that the structure is complicated, has reduced the processing degree of difficulty and manufacturing cost.
Specifically, in the present embodiment, the combustion area 110 and the heat exchange area 120 are sequentially disposed from bottom to top to facilitate heat transfer, and accordingly, the gas flows from bottom to top (i.e., the direction of the arrow in fig. 2), and the air flows in the air flow path 4 also flow from bottom to top. It is understood that in other embodiments, the combustion zone 110 and the heat exchange zone 120 may be arranged in other manners (e.g., arranged in sequence along a horizontal direction), and the gas flowing direction may be set to other directions accordingly.
The gas water heater of the present embodiment drives air to flow along the air flow path 4 by using the fan 6, and specifically, the fan 6 is provided in the air flow path 4, the air flowing in the air flow path 4 is from outside air, the outside air is allowed to enter the air flow path 4 by using the fan 6, and the air is caused to flow in the gas flow direction, thereby achieving cooling of the housing 1.
In the present embodiment, the fan 6 is provided at the beginning 41 of the air flow path 4, and the fan 6 is a blower 6. The blower 6 may blow air into the beginning 41 of the air flow path 4 for the purpose of flowing air within the air flow path 4 to cool the housing 1.
The beginning 41 of the air flow path 4 coincides with the secondary air channel of the burner 3, along which the fan 6 also serves to drive the air flow. The starting end 41 of the air flow path 4 is overlapped with the secondary air channel of the burner 3, so that the fan 6 drives the external air to flow in the air flow path 4 to realize the purpose of cooling the shell 1, and drives the external air to flow into the burner 3 to be used as the secondary air to help combustion, namely the fan 6 drives the cooling gas and the secondary air at the same time, and the number of components in the gas water heater can be effectively reduced.
The start end 41 of the air flow path 4 has an intake port 5 through which outside air enters the combustion chamber 10, and the intake port 5 communicates with the air flow path 4. Under the driving of the fan 6, the outside air enters the air flow path 4 through the air inlet 5, and the cooling of the housing 1 is realized. At the same time, secondary air can also enter the burner 3 with the air inlet 5.
The air flow path 4 of the air film generating mechanism comprises a through hole 11 arranged on the side wall of the shell 1, and the air film generating mechanism also comprises a guide plate 12 arranged on the inner side of the shell 1, wherein the guide plate 12 is used for guiding the air to flow along the gas flow direction after the air flows out from the through hole 11. Air passes through hole 11 and gets into the inboard of casing 1, and under the water conservancy diversion effect of guide plate 12, the air flows along the gas flow direction to make the air can flow along the inner wall of casing 1, guarantee the cooling effect of casing 1.
In a preferred embodiment, the through holes 11 are sequentially arranged in a plurality of rows along the flowing direction of the fuel gas, and the guide plates 12 are arranged in a plurality, and each guide plate 12 is arranged corresponding to one row of the through holes 11. Through setting up multirow through-hole 11 for each part of casing 1 inboard can both contact external low temperature air, has improved the cooling effect. Through setting up a plurality of guide plates 12, guarantee that cooling air flows along casing 1 wall as far as possible, moreover because every row of through-hole 11 all is provided with guide plate 12 correspondingly for the air that gets into from each through-hole 11 can all flow along the gas flow direction under the effect of guide plate 12. In the present embodiment, each row of through holes 11 is arranged on the casing 1 along the circumferential direction, and accordingly, the baffle 12 is annular, so that one baffle 12 can play a role of guiding air to the through holes 11 in one row.
The guide plate 12 includes a first guide portion 121 connected to the housing 1 and a second guide portion 122 far from the housing 1, the first guide portion 121 has a J-shaped cross section for changing the air flowing direction, and the second guide portion 122 has an I-shaped cross section for guiding the air to keep the gas flowing direction. After the air enters the inside of the case 1 through the through hole 11, the air first contacts the first guide 121 of the J-shape so that the flow direction of the air becomes the same as the flow direction of the gas, and then the air maintains the flow direction of the gas under the guidance of the second guide 122 of the I-shape.
The gap between the second guide portion 122 and the inner wall surface of the case 1 is for air to flow, and air flows through the gap between the second guide portion 122 and the inner wall of the case 1, so that the air keeps flowing in the gas flowing direction.
In the present embodiment, the air flow path 4 further includes an air guide channel 7 located outside the casing 1, and air can flow along the air guide channel 7 in the flow direction of the combustion gas, and can cool the outer wall of the casing 1, while the air guide channel 7 communicates with each through hole 11, thereby supplying cooling air to the inner wall of the casing 1. Preferably, the casing 1 is externally sleeved with an outer casing 20, and a gap between the outer casing 20 and the casing 1 forms the air guide channel 7.
The burner 3 and the casing 1 are connected by a connecting portion 8, the air flow path 4 of the film generating means includes a cooling hole 81 opened on the surface of the connecting portion 8, and the opening direction of the cooling hole 81 is provided toward the inner wall surface of the casing 1. The connection portion 8 enables the combustor 3 and the casing 1 to be firmly connected, the air flowing path 4 is kept smooth through the cooling hole 81 formed in the connection portion 8, air can smoothly flow in the air flowing path 4 to be cooled, and due to the fact that the cooling hole 81 is arranged towards the inner wall face of the casing 1, the outside air can be directly blown to the inner wall face, and the cooling effect is good.
The film generating mechanism drives the air through the combustion region 110 and then through the heat exchange region 120. The air may participate in the combustion zone to form secondary air, which will ultimately flow to the heat exchange zone 120, so that energy is not wasted, regardless of whether the air driven by the film generating mechanism participates in the combustion.
Example 2
As shown in fig. 6 and 7, which are gas water heaters of embodiment 2 of the present invention, the gas water heater of embodiment 2 is basically the same as that of embodiment 1, except that: a fan 6 is arranged at the end 42 of the air flow path 4, the fan 6 being a suction fan 6.
The suction fan 6 can draw air from the end 42 of the air flow path 4 to effect a drive air flow in the air flow path 4. The tail end 42 of the air flowing channel 4 is overlapped with the smoke discharging channel of the heat exchanging area 120, the fan 6 is also used for driving smoke to be discharged from the combustion chamber 10, and the fan 6 drives the air in the air flowing channel 4 to flow and simultaneously drives the smoke to be discharged from the combustion chamber 10, so that the number of components in the gas water heater can be effectively reduced.
Further, in the present embodiment, the gas water heater further includes a cooling wall 9, the cooling wall 9 is disposed around the burner 3, and a gap between the cooling wall 9 and the casing 1 forms the air flow path 4 to separate the air flow path 4 from the gas flow passage in the combustion chamber 10. The air flow path 4 that forms between stave 9 and the casing 1 is comparatively sealed, guarantees that the air can flow along the inner wall of casing 1 to reach better cooling effect, stave 9 can make and keep apart relatively between combustor 3 and the casing 1 moreover, makes casing 1 be heated less, thereby further restraines casing 1 temperature rise.
While specific embodiments of the invention 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 invention 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 invention, and these changes and modifications are within the scope of the invention.
Claims (14)
1. The utility model provides a gas water heater, its includes casing, heat exchanger and combustor, form a combustion chamber in the casing, heat exchanger set up in combustion chamber's heat transfer is regional, the combustor set up in combustion chamber's combustion area is interior, its characterized in that, gas water heater still includes air film generating mechanism, air film generating mechanism has the air flow path who flows through combustion chamber, air flow path form in the inner wall surface of casing, air film generating mechanism drive air is in flow to along the gas flow direction in the air flow path heat transfer is regional.
2. The gas water heater of claim 1, wherein a fan is disposed in said air flow path for driving air along said air flow path.
3. The gas water heater of claim 2, wherein said fan is disposed at the beginning of said air flow path, said fan being a blower.
4. A gas water heater as set forth in claim 3 wherein the beginning of said air flow path coincides with a secondary air passage of said burner, said fan being further adapted to drive the flow of said air along said secondary air passage.
5. The gas water heater of claim 2, wherein said fan is disposed at the end of said air flow path, said fan being a suction fan.
6. The gas water heater of claim 5, wherein the air flow path terminates coincident with a smoke evacuation path of the heat exchange region, the fan further for driving smoke out of the combustion chamber.
7. The gas water heater of claim 5, wherein the beginning of said air flow path has an air inlet for said air from the outside to enter said combustion chamber, said air inlet being in communication with said air flow path.
8. The gas water heater of claim 1, wherein the air flow path of the film generating mechanism includes a through hole opened in a side wall of the housing, and the film generating mechanism further includes a baffle plate disposed inside the housing for guiding the air to flow in a gas flow direction after the air flows out of the through hole.
9. The gas water heater of claim 8, wherein said through holes are arranged in a plurality of rows in sequence along the flowing direction of the gas, and said flow guide plate is arranged in a plurality of rows, and each of said flow guide plates is arranged corresponding to one of said through holes.
10. The gas water heater of claim 8, wherein said baffle includes a first baffle portion connected to said housing and a second baffle portion remote from said housing, said first baffle portion having a J-shaped cross-section for changing the direction of flow of said air, said second baffle portion having an I-shaped cross-section for directing said air to maintain the direction of flow of said gas.
11. The gas water heater of claim 10, wherein a gap between the second deflector and an inner wall surface of the housing provides for the flow of air.
12. The gas water heater of claim 1, wherein the burner is connected to the housing through a connecting portion, and the air flow path of the film generating mechanism includes a cooling hole opened on a surface of the connecting portion, and an opening direction of the cooling hole is toward an inner wall surface of the housing.
13. The gas water heater of claim 12, further comprising a cooling wall disposed around the burner, a gap between the cooling wall and the housing forming the air flow passage to separate the air flow passage from a gas flow passage within the combustion chamber.
14. The gas fired water heater of any one of claims 1-13, wherein said film generating mechanism drives said air through said heat exchange region after flowing through said combustion region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257773.3A CN111442522A (en) | 2020-04-02 | 2020-04-02 | Gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257773.3A CN111442522A (en) | 2020-04-02 | 2020-04-02 | Gas water heater |
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| CN111442522A true CN111442522A (en) | 2020-07-24 |
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ID=71649867
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| CN202010257773.3A Pending CN111442522A (en) | 2020-04-02 | 2020-04-02 | Gas water heater |
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Cited By (5)
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| WO2021083338A1 (en) * | 2019-10-31 | 2021-05-06 | 芜湖美的厨卫电器制造有限公司 | Gas device |
| CN112833534A (en) * | 2021-01-08 | 2021-05-25 | 宁波方太厨具有限公司 | Gas water heater |
| CN114017775A (en) * | 2021-10-29 | 2022-02-08 | 广东万和新电气股份有限公司 | Gas heat exchange device and combustion chamber |
| WO2022152277A1 (en) * | 2021-01-15 | 2022-07-21 | 芜湖美的厨卫电器制造有限公司 | Gas device and gas water heater |
| CN116336469A (en) * | 2023-05-24 | 2023-06-27 | 杭州老板电器股份有限公司 | Flow path system, combustion heat exchange assembly and gas water heater |
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| CN112833534A (en) * | 2021-01-08 | 2021-05-25 | 宁波方太厨具有限公司 | Gas water heater |
| WO2022152277A1 (en) * | 2021-01-15 | 2022-07-21 | 芜湖美的厨卫电器制造有限公司 | Gas device and gas water heater |
| CN114017775A (en) * | 2021-10-29 | 2022-02-08 | 广东万和新电气股份有限公司 | Gas heat exchange device and combustion chamber |
| CN116336469A (en) * | 2023-05-24 | 2023-06-27 | 杭州老板电器股份有限公司 | Flow path system, combustion heat exchange assembly and gas water heater |
| CN116336469B (en) * | 2023-05-24 | 2023-08-18 | 杭州老板电器股份有限公司 | Flow path system, combustion heat exchange assembly and gas water heater |
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Application publication date: 20200724 |