CN212005682U - Gas distributor and gas water heater - Google Patents
Gas distributor and gas water heater Download PDFInfo
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- CN212005682U CN212005682U CN202020130161.3U CN202020130161U CN212005682U CN 212005682 U CN212005682 U CN 212005682U CN 202020130161 U CN202020130161 U CN 202020130161U CN 212005682 U CN212005682 U CN 212005682U
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Abstract
The utility model discloses a gas distributor and gas heater, include: a gas distribution channel having a plurality of paths; the number of the air injection cavities is not less than that of the air distribution channels, the air injection cavities are sequentially arranged, the air injection cavities are provided with air injection inlets and air injection outlets, and every two adjacent air injection cavities are respectively connected with different air distribution channels through the air injection outlets. The utility model discloses a gas distributor has avoided appearing the local microthermal condition, because low temperature can produce the comdenstion water, consequently can reduce the production of comdenstion water, and then can avoid the corruption of comdenstion water to the heat exchanger. In addition, when fire transmission and subsection switching are carried out, fire transmission is faster and more stable because every two adjacent fire rows can carry fire from left to right. The gas water heater matched with the distributor has small temperature fluctuation when the distributor is used for switching the valve, and can bring better user experience; in addition, the service life of the heat exchanger is prolonged, and the reliability of the product is improved.
Description
Technical Field
The utility model belongs to the technical field of gas heater, specifically speaking relates to a gas distributor and adopt its gas heater.
Background
The gas water heater is a water heater widely used in families at present, and has the advantages of small volume, high heating speed and instant heating when being opened.
In the actual use process, the outlet water temperature set by different users is different, and the outlet water temperature is not changed under the condition of different water consumption. The combustion load is generally adjusted by means of staged combustion, for example, 12L gas water heater, and the burner has 12 rows of fire rows, generally designed as 5/7/12 rows of staged combustion, and 5 sections and 7 sections are arranged side by side. The combustion subsection mode has the problems of unstable fire transfer (failed fire transfer) and slow fire transfer speed; in addition, when one section burns, the corresponding fire grate of the other section is only blown and does not burn, so that the temperature of the heat exchanger is uneven, condensed water is generated by small-load combustion, and the heat exchanger is easy to corrode.
Disclosure of Invention
The utility model discloses there is the technical problem that passes fire unstability, pass the fire slow speed when firing to current gas heater segmentation, provide a gas distributor, can solve above-mentioned problem.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
a gas distribution device comprising:
a gas distribution channel having a plurality of paths;
the number of the air injection cavities is not less than that of the air distribution channels, the air injection cavities are sequentially arranged, the air injection cavities are provided with air injection inlets and air injection outlets, and every two adjacent air injection cavities are respectively connected with different air distribution channels through the air injection outlets.
Further, the number N of the air injection cavities is larger than the number M of the air distribution channels.
Furthermore, in every adjacent M +1 air injection cavities, the first air injection cavity and the last air injection cavity are connected with the same air distribution channel.
Further, the gas distribution channel is connected with the gas inlet pipe through a gas inlet, and a control valve is arranged at the gas inlet.
Furthermore, the area ratio of the air inlets of the air distribution channels is consistent with the number ratio of the air injection cavities connected with the air distribution channels.
Further, the method also comprises the following steps: the number of the pressure dividing cavities is consistent with that of the gas dividing channels, the pressure dividing cavities and the gas dividing channels are communicated in a one-to-one correspondence mode, and the air injection cavities are communicated with the corresponding gas dividing channels through the pressure dividing cavities.
Furthermore, the pressure dividing cavity and the air dividing channel are respectively provided with two air injection outlets arranged on one side face of the air injection cavity, one pressure dividing cavity is arranged below the air injection cavity and is a first pressure dividing cavity, the other pressure dividing cavity is arranged above the air injection cavity and is a second pressure dividing cavity, an air injection inlet of the air injection cavity communicated with the first pressure dividing cavity is arranged on the bottom wall of the air injection cavity, an air injection inlet of the air injection cavity communicated with the second pressure dividing cavity is arranged on the top wall of the air injection cavity, the air dividing channel is positioned below the air injection cavity, one air dividing channel is communicated with the first pressure dividing cavity, and the other air dividing channel extends upwards from the outer side of the end part of the air injection cavity and is communicated with the second pressure dividing cavity.
Furthermore, the pressure dividing cavities and the air dividing channels are respectively provided with three pressure dividing cavities, the air injection outlets are arranged on one side face of the air injection cavity, one pressure dividing cavity is arranged below the air injection cavity and is a first pressure dividing cavity, the other pressure dividing cavity is arranged above the air injection cavity and is a second pressure dividing cavity, the other pressure dividing cavity is arranged on one side of the air injection cavity opposite to the air injection outlets and is a third pressure dividing cavity, the air injection inlet of the air injection cavity communicated with the first pressure dividing cavity is arranged on the bottom wall of the air injection cavity, the air injection inlet of the air injection cavity communicated with the second pressure dividing cavity is arranged on the top wall of the air injection cavity, the air injection inlet of the air injection cavity communicated with the third pressure dividing cavity is arranged on one side wall of the air injection cavity, which faces the third pressure dividing cavity, and the air dividing channels are positioned below the air injection cavity.
The utility model discloses simultaneously provide a gas heater, including the combustion chamber, arrange the a plurality of fire row that sets up in proper order in the combustion chamber, still include the gas distributor who records in any preceding record, gas distributor sets up the below that the fire was arranged, the jet-propelled export of gas jet cavity is aimed at with the injection hole that the fire was arranged.
Furthermore, the air injection cavities are sequentially arranged and distributed according to the arrangement direction of the fire rows.
Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses a gas distributor, mutual independence between every gas cavity that spouts, every two adjacent gas cavity that spouts are connected the difference respectively and are divided the gas passageway, especially when the sectional combustion, only partial gas channel that divides provides the gas, corresponding only with the fire row burning that the gas cavity that divides the gas channel intercommunication corresponds, consequently the fire row of burning is whole combustor evenly distributed relatively, can solve the uneven problem of the interval heat distribution of top heat exchanger like this, the local microthermal condition has been avoided appearing, because low temperature can produce the comdenstion water, consequently, can reduce the production of comdenstion water, and then can avoid the corruption of comdenstion water to the heat exchanger. In addition, when fire transmission and subsection switching are carried out, fire transmission is faster and more stable because every two adjacent fire rows can carry fire from left to right. The gas water heater matched with the distributor has small temperature fluctuation when the distributor is used for switching the valve, and can bring better user experience; in addition, the service life of the heat exchanger is prolonged, and the reliability of the product is improved.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a gas water heater provided by the present invention;
FIG. 2 is a schematic view of the gas distribution device of FIG. 1;
fig. 3 is a schematic structural view of another embodiment of the gas distribution device provided by the present invention;
fig. 4 is a side view of the structure of fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The water outlet temperatures of gas water heaters set by different users are different, the water outlet temperatures required in different seasons are also different, the combustion load of the existing gas water heater is generally adjusted by a sectional combustion mode, particularly in summer, in order to reduce the lowest value of the water outlet temperature of the water heater as much as possible, the water outlet temperature is not overheated by body feeling, but condensate water is more easily generated, and the problems of casing corrosion, circuit short circuit and the like are caused. Based on this, the utility model provides a gas distributor through the rational configuration combustor, avoids the production of comdenstion water as far as possible, will be explained with a specific embodiment below.
In the first embodiment, as shown in fig. 1, the gas distribution device 1 is disposed between a gas valve and a plurality of fire rows 3, and includes a gas distribution channel 11 and a plurality of gas injection cavities 12, where the gas distribution channel 11 has a plurality of paths, the number of the gas injection cavities 12 is not less than the number of the gas distribution channel 11, each gas injection cavity 12 is provided with a gas injection inlet 121 and a gas injection outlet 122, each gas distribution channel 11 is connected to a gas inlet pipe through a control valve 13, the control valve 13 is used to control whether the gas enters the gas distribution channel 11 of the path, when the gas enters the gas distribution channel 11, the gas enters the gas injection cavity 12 and is further supplied to the fire row aligned with the gas distribution channel, the fire row burns, the gas inlet pipe is connected to a gas main pipe, and the gas injection outlet 122 of the gas injection cavity 12 is aligned with the injection hole of each fire row.
The gas distribution passage 11 is connected to an intake pipe (not shown) through an intake port, and a control valve is provided at the intake port.
The gas distribution channel 11 may be enclosed by a gas-tight baffle, or may be implemented by a pp pipe, which is not specifically limited herein.
The principle of the sectional combustion is as follows: when the number of the paths of the gas distribution channels 11 is greater than 2, the scheme can also comprise any combination of the multiple gas distribution channels 11 which are between 1 gas distribution channel and all gas distribution channels and can supply gas simultaneously, each group of combustion modes, namely a combustion section, are sequentially named as one-section combustion and two-section combustion … …, so that when different energy requirements are met, the scheme can be realized by opening different gas distribution channels 11, and the more the gas distribution channels 11 are opened, the more gas can be supplied for combustion, and the more energy is supplied correspondingly.
The gas distributor of this embodiment, mutually independent between every gas cavity 12 that spouts, every two adjacent gas cavities 12 that spout connect different gas channel 11 respectively, especially when the segmentation burning, only partial gas channel that divides provides the gas, the corresponding fire that corresponds with the gas cavity that spouts of this gas channel intercommunication only discharges the burning, therefore, the gas cavity 12 that spouts of ventilating is even interval distribution, the fire is arranged the rule unanimously with gas cavity 12 that spouts, consequently, the fire that burns is arranged whole combustor evenly distributed relatively, can solve the interval uneven problem of heat distribution in top heat exchanger like this, the local microthermal condition has been avoided appearing, because low temperature can produce the comdenstion water, consequently, can reduce the production of comdenstion water, and then reducible or avoid the corruption of comdenstion water to the heat exchanger. In addition, when fire transmission and subsection switching are carried out, fire transmission is faster and more stable because every two adjacent fire rows can carry fire from left to right. The gas water heater matched with the distributor has small temperature fluctuation when the distributor is used for switching the valve, and can bring better user experience; in addition, the service life of the heat exchanger is prolonged, and the reliability of the product is improved.
Since the air injection chambers 12 are used for directly injecting the combustion gas for the fire grate to burn, the number N of the air injection chambers should be not less than the number M of the air distribution channels, and in order to reduce the complexity of the equipment, it is preferable that the number N of the air injection chambers be greater than the number M of the air distribution channels.
In order to further improve the uniformity of the gas-distributing gas-injection cavities 12 and the corresponding more uniform fire rows when only part of the gas-distributing channels 11 are supplied with gas, in the present embodiment, the first gas-injection cavity 12 and the last gas-injection cavity 12 are connected to the same gas-distributing channel 11 in every adjacent M +1 gas-injection cavities.
As shown in fig. 2, in the present embodiment, 11 air injection cavities 12 and 2 air distribution channels 11 are taken as an example for explanation, corresponding to M =2 and N =11, in the figure, the air injection cavities 12 are sequentially arranged in a row, and the air injection cavities 12 are numbered from 1 to 11 from left to right, the two air distribution channels 11 include a first air distribution channel 111 and a second air distribution channel 112, wherein the second air distribution channel 11 is
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The air injection chambers 12 are respectively communicated with a first air distribution channel 111
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The air injection chambers 12 are respectively communicated with the second branch air passages 112, and the arrangement is that when the control valve of the first branch air passage 111 is opened and the control valve of the second branch air passage 112 is not opened, only the control valve is opened
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The jet-propelled chamber 12 of No. gets into the gas, the fire row that corresponding arrangement order and jet-propelled chamber 12 are unanimous burns according to same distribution mode, that is, all interval 1 unburned fire row between the fire row of every two adjacent burning, adopt laying of such mode, make the combustion chamber thermally equivalent of fire row top, can not appear the local high temperature of combustion chamber temperature and local low temperature, and low temperature department produces the phenomenon that steam condenses into water, fundamentally avoids the production of comdenstion water, and then can solve the corruption shell that the comdenstion water caused, damage the problem of circuit. In addition, can lead to the fire of gas and arrange evenly to lay, flame can be simultaneously to both sides biography fire during the biography fire, passes the fire fast, and the fire that leads to the gas simultaneously arranges evenly that the distance can not appear and lead to the problem of passing fire failure far away. The gas water heater matched with the gas distribution device has small temperature fluctuation when the valve is switched by fire transmission, and can bring better user experience.
The area ratio of the air inlets of the air distribution channels 11 is consistent with the number ratio of the air injection cavities 12 connected with the air distribution channels 11. That is, the larger the number of the air injection chambers 12 connected to the air distribution channel 11 is, the larger the air inlet area of the air distribution channel 11 is, and vice versa, so that the corresponding gas injection speed of each air injection chamber 12 can be more uniform. And the areas of the air injection inlets 121 of the air injection cavities 12 are consistent, and the areas of the air injection outlets 122 of the air injection cavities 12 are consistent, so that particularly when switching from one combustion section to another, the air distribution of the air injection cavities 12 connected with the same air distribution channel 11 is uniform, and the air distribution of the air injection cavities 12 connected with different air distribution channels 11 is uniform.
Because the gas pressure among the gas house steward is inhomogeneous, it is inhomogeneous to lead to the gas that gets into the fire row easily, leads to the burning unstable, and because the unable predictable adaptation of going on of entering air is adjusted, leads to the burning insufficient easily, and the energy is wasted, can produce more harmful gas simultaneously, still includes preferably in this embodiment in order to avoid the emergence of above-mentioned condition: the number of the pressure dividing cavities 14 is the same as that of the air dividing channels 11, the pressure dividing cavities 14 are communicated with the air dividing channels 11 in a one-to-one correspondence mode, and then the pressure dividing cavities 14 are communicated with the corresponding air injection cavities 12, namely, the air injection cavities 12 are communicated with the corresponding air dividing channels 11 through the pressure dividing cavities 14. Through having set up partial pressure chamber 14 between branch gas passageway 11 and jet-propelled chamber 12, partial pressure chamber 14 can carry out the secondary steady voltage to the gas for the gas flow that gets into in the jet-propelled chamber 12 is more even, and the corresponding gas that provides the fire row is also more stable at a constant voltage, has solved a series of problems that intake pressure is unstable and has brought.
As shown in fig. 2, when the pressure-dividing chamber 14 and the gas-dividing passage 11 are respectively provided in two, the gas ejection outlet 122 is provided on one side surface of the gas ejection chamber 12, one of the pressure-dividing chambers is provided below the gas ejection chamber 12 as a first pressure-dividing chamber 141, the other pressure-dividing chamber is provided above the gas ejection chamber 12 as a second pressure-dividing chamber 142, the gas ejection inlet 121a of the gas ejection chamber communicating with the first pressure-dividing chamber 141 is provided on the bottom wall of the gas ejection chamber, the gas ejection inlet 121b of the gas ejection chamber communicating with the second pressure-dividing chamber 142 is provided on the top wall of the gas ejection chamber, the gas-dividing passage 11 is provided below the gas ejection chamber 12, one of the gas-dividing passages 11 communicates with the first pressure-dividing chamber 141, and the other gas-dividing passage 11 extends upward from the outer side of the end portion of the gas ejection chamber 12 to communicate with the second pressure. This scheme compact structure can enough practice thrift gas heater's inner space, can play the effect that the branch gas is even, steady voltage simultaneously.
Second embodiment, this embodiment proposes an embodiment having three pressure-dividing chambers and air-dividing passages, as shown in fig. 3 and 4, when the pressure-dividing chamber 14 and the air-dividing passage 11 have three pressure-dividing chambers, respectively, the air-jet outlet 122 is also provided on one side surface of the air-jet chamber 12, one of the pressure-dividing chambers is provided below the air-jet chamber 12 as a first pressure-dividing chamber 143, the other pressure-dividing chamber is provided above the air-jet chamber 12 as a second pressure-dividing chamber 144, the other pressure-dividing chamber is provided on the side of the air-jet chamber 12 opposite to the air-jet outlet 122 as a third pressure-dividing chamber 145, the air-jet inlet of the air-jet chamber communicating with the first pressure-dividing chamber 143 is provided on the bottom wall of the air-jet chamber 23, the air-jet inlet of the air-jet chamber communicating with the second pressure-dividing chamber 144 is provided on the top wall of the air-jet chamber 12, the air-jet inlet of the air-jet chamber communicating with the third pressure-dividing chamber 145 is provided on one side wall, the three gas distribution channels 11 are all positioned below the gas spraying cavity. And two of the gas distribution channels 11 are respectively communicated with the first pressure distribution cavity 143 and the third pressure distribution cavity 145, and the other gas distribution channel 11 extends upwards from the outer side of the end part of the gas injection cavity 12 to be communicated with the second pressure distribution cavity 144.
The gas heater of this scheme of adoption, the combustion method that can realize has: when only one of the gas distribution channels 11 is ventilated, 3 combustion sections are provided, when two gas distribution channels 11 are ventilated, 3 combustion sections are provided, when three gas distribution channels 11 are ventilated simultaneously, 1 combustion section is provided for full-section combustion, and the above mode has 7 sections which can be used by users selectively. This scheme compact structure can enough practice thrift gas heater's inner space, can play the effect that the branch gas is even, steady voltage simultaneously.
In a third embodiment, the present invention provides a gas water heater, as shown in fig. 1, which includes a combustion chamber 4, a plurality of fire rows 3 sequentially arranged in the combustion chamber 4, and a gas distributor 1, where the gas distributor 1 is disposed below the fire rows 3, the gas distributor 1 is disposed between a gas valve 2 and the fire rows 3, and includes a gas distribution channel 11 and gas injection cavities 12, the gas distribution channel 11 has multiple paths, the number of the gas injection cavities 12 is not less than the number of the gas distribution channel 11, each gas injection cavity 12 is provided with a gas injection inlet 121 and a gas injection outlet 122, each gas distribution channel 11 is connected to a gas inlet pipe through a control valve 13, the control valve 13 is used to control whether the gas distribution channel 11 of the path enters gas, when the gas distribution channel 11 enters gas, the gas enters the gas injection cavity 12 and is supplied to the fire row aligned with the gas distribution channel, the fire row combusts the gas inlet pipe is connected to a gas main pipe, the gas injection outlets 122 of the gas injection cavities 12 are aligned to injection holes of each fire row, used for providing fuel gas for the combustion of the fire row.
The air-ejecting chambers 12 are sequentially arranged according to the arrangement direction of the fire rows 3. When the sectional combustion, the air injection cavity 12 that ventilates is even interval distribution, and consequently the fire row of burning is whole combustor evenly distributed relatively, can solve the interval uneven problem of heat distribution of top heat exchanger like this, has avoided appearing local microthermal condition, because low temperature can produce the comdenstion water, consequently can reduce the production of comdenstion water, and then reducible or avoid the corruption of comdenstion water to the heat exchanger. In addition, when fire transmission and subsection switching are carried out, fire transmission is faster and more stable because every two adjacent fire rows can carry fire from left to right. The gas water heater matched with the distributor has small temperature fluctuation when the distributor is used for switching the valve, and can bring better user experience; in addition, the service life of the heat exchanger is prolonged, and the reliability of the product is improved.
Other structures of the gas distribution device 1 can be mentioned in the first embodiment, and are not described herein.
The gas water heater of this embodiment still includes water pipe 5, inflow flow induction system (not shown in the figure), heat exchanger 6 and fan etc. and the heat that the gas was burnt above the fire row produces reaches heat exchanger 6, realizes heating the water in the water pipe.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.
Claims (10)
1. A gas distribution device, comprising:
a gas distribution channel having a plurality of paths;
the number of the air injection cavities is not less than that of the air distribution channels, the air injection cavities are sequentially arranged, the air injection cavities are provided with air injection inlets and air injection outlets, and every two adjacent air injection cavities are respectively connected with different air distribution channels through the air injection outlets.
2. The gas distribution device according to claim 1, wherein the number N of the gas injection chambers is greater than the number M of the gas distribution channels.
3. The gas distribution device according to claim 2, wherein the first and last of every M +1 adjacent gas injection chambers are connected to the same gas distribution channel.
4. The gas distribution device according to claim 1, wherein the gas distribution channel is connected to a gas inlet pipe through a gas inlet, and a control valve is provided at the gas inlet.
5. The gas distribution device according to claim 4, wherein the area ratio of the gas inlets of the gas distribution channels is identical to the number ratio of the gas ejection chambers connected to the gas distribution channels.
6. The gas distribution device according to any one of claims 1 to 5, further comprising:
the number of the pressure dividing cavities is consistent with that of the gas dividing channels, the pressure dividing cavities and the gas dividing channels are communicated in a one-to-one correspondence mode, and the air injection cavities are communicated with the corresponding gas dividing channels through the pressure dividing cavities.
7. The gas distribution device according to claim 6, wherein the pressure dividing chamber and the gas dividing channel are respectively provided with two gas injection outlets, the gas injection outlets are arranged on one side surface of the gas injection chamber, one pressure dividing chamber is arranged below the gas injection chamber and is a first pressure dividing chamber, the other pressure dividing chamber is arranged above the gas injection chamber and is a second pressure dividing chamber, a gas injection inlet of the gas injection chamber communicated with the first pressure dividing chamber is arranged on the bottom wall of the gas injection chamber, a gas injection inlet of the gas injection chamber communicated with the second pressure dividing chamber is arranged on the top wall of the gas injection chamber, the gas dividing channel is arranged below the gas injection chamber, one gas dividing channel is communicated with the first pressure dividing chamber, and the other gas dividing channel extends upwards from the outer side of the end part of the gas injection chamber and is communicated with the second pressure dividing chamber.
8. The gas distribution device according to claim 6, wherein the pressure distribution chamber and the gas distribution passage are respectively provided in three numbers, the gas ejection outlet is opened on one side surface of the gas ejection chamber, one of the pressure dividing cavities is arranged below the air injection cavity and is a first pressure dividing cavity, the other pressure dividing cavity is arranged above the air injection cavity and is a second pressure dividing cavity, the other pressure dividing cavity is arranged on one side of the air injection cavity opposite to the air injection outlet and is a third pressure dividing cavity, the air injection inlet of the air injection cavity communicated with the first partial pressure cavity is arranged on the bottom wall of the air injection cavity, the air injection inlet of the air injection cavity communicated with the second partial pressure cavity is arranged on the top wall of the air injection cavity, and the air injection inlet of the air injection cavity communicated with the third partial pressure cavity is formed in one side wall, facing the third partial pressure cavity, of the air injection cavity, and the air distribution channel is positioned below the air injection cavity.
9. A gas water heater comprises a combustion chamber, wherein a plurality of fire rows are sequentially arranged in the combustion chamber, and the gas water heater is characterized by further comprising a gas distribution device according to any one of claims 1 to 8, the gas distribution device is arranged below the fire rows, and the gas injection outlets of the gas injection cavity are aligned with the injection holes of the fire rows.
10. The gas water heater of claim 9, wherein the gas ejection chambers are arranged in sequence according to the arrangement direction of the fire grate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020130161.3U CN212005682U (en) | 2020-01-20 | 2020-01-20 | Gas distributor and gas water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020130161.3U CN212005682U (en) | 2020-01-20 | 2020-01-20 | Gas distributor and gas water heater |
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| CN212005682U true CN212005682U (en) | 2020-11-24 |
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| CN202020130161.3U Active CN212005682U (en) | 2020-01-20 | 2020-01-20 | Gas distributor and gas water heater |
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| CN (1) | CN212005682U (en) |
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