CN210892135U - Gas water heater - Google Patents

Abstract

The utility model discloses a gas water heater relates to water heater technical field, and gas water heater includes: the low-nitrogen combustion device comprises a combustion device shell assembly and a plurality of low-nitrogen combustion fire rows arranged in the combustion device shell assembly; the smoke exhaust device is arranged above the low-nitrogen combustion device and comprises a smoke exhaust cavity and a fan assembly arranged at the smoke exhaust end of the smoke exhaust cavity; and the heat exchange device is arranged between the low-nitrogen combustion device and the smoke exhaust device and comprises a smoke exhaust connecting end which is hermetically connected with the smoke inlet end of the smoke exhaust cavity above and a combustor connecting end which is hermetically connected with the combustion device shell below. The utility model discloses a gas heater simple structure is reasonable, the leakproofness is good, low noise and low nitrogen oxide discharge.

Description

Gas water heater

Technical Field

The utility model relates to a water heater technical field specifically, relates to a gas heater.

Background

The existing low-nitrogen emission type gas water heater mostly adopts a thick and thin burner structure and places a fan under a combustion system part, and is a strong drum type combustion mode. Although the structure of the combustion part is simpler than the common structure, the assembly of the combustor and the gas inlet part is complex, and because the fan is arranged at the lower part, the combustion system, the heat exchange system and the smoke exhaust channel are all positive pressure, so that larger pressure difference is generated in the combustion system, and if the air quantity is increased, the rotating speed of the fan is increased. The operation of the fan is a main source of larger noise generated by the gas water heater, and the larger the rotating speed of the fan is, the larger the noise generated by the gas water heater is.

Disclosure of Invention

The utility model aims at providing a novel gas heater, this gas heater simple structure is reasonable, the leakproofness is good, low noise and low nitrogen oxide discharge.

In order to achieve the above object, the utility model provides a low nitrogen gas heater, gas heater includes:

the low-nitrogen combustion device comprises a combustion device shell assembly and a plurality of thick and thin combustion fire rows arranged in the combustion device shell assembly;

the smoke exhaust device is arranged above the low-nitrogen combustion device and comprises a smoke exhaust cavity and a fan assembly arranged at the smoke exhaust end of the smoke exhaust cavity; and

and the heat exchange device is arranged between the low-nitrogen combustion device and the smoke exhaust device and comprises a smoke exhaust connecting end which is hermetically connected with the smoke inlet end of the smoke exhaust cavity above and a combustor connecting end which is hermetically connected with the combustion device shell below.

Optionally, the gas water heater includes a burner air inlet disposed on the burner housing assembly, a burner smoke outlet disposed at the smoke outlet, and a sealed outer housing portion between the burner air inlet and the burner smoke outlet.

In some embodiments, the burner housing assembly may be formed with a top port and a burner inlet disposed in a sidewall of the burner housing assembly, a perimeter of the top port being formed with a top perimeter flange, and the burner connection end being formed with a bottom perimeter flange that sealingly abuts against the top perimeter flange.

Furthermore, an annular sealing element can be arranged between the top circumferential edge flanging and the bottom circumferential edge flanging in a cushioning mode, and the bottom end of the annular sealing element extends into the top end through hole and is attached to the inner circumferential wall of the top end through hole in a sealing mode.

Further, the bottom end of the annular seal member may be provided with a secondary air passage hole.

In some embodiments, the smoke exhaust connecting end can be provided with a smoke exhaust end peripheral flanging, a circumferential connecting flange is fixedly installed on the smoke exhaust end peripheral flanging, and the circumferential connecting flange is in sealing connection with the smoke inlet end of the smoke exhaust cavity.

Optionally, the circumferential connecting flange comprises:

the flange body part is stacked on the outward turning edge of the peripheral edge of the smoke exhaust end, and the bottom edge of the smoke inlet end is in sealing butt joint with the flange body part;

the inner end of the flange is turned up, and the flange is integrally turned up from the inner end of the flange body and extends into the smoke exhaust cavity; and

the flange outer end downward flanging part integrally extends downwards from the outer end of the flange body part.

Further, the fan assembly comprises a drive motor for driving the fan impeller, and the drive motor is an alternating current drive motor.

Further, the burner housing assembly may include first and second housing pieces assembled together, the burner inlet port including upper and lower inlet ports disposed on a side wall of the first housing piece, the low-nitrogen combustion row disposed in a surrounding cavity of the second housing piece, each low-nitrogen combustion row including a rich flame burner unit and a lean flame burner unit, one of the rich flame burner unit and the lean flame burner unit being connected to the upper inlet port and the other being connected to the lower inlet port.

Optionally, the gas water heater may include a gas proportional valve disposed between the low-nitrogen combustion device and the gas supply line and located below the low-nitrogen combustion device, a motor controller for controlling the smoke exhaust device, and a main controller, the main controller is connected to the gas proportional valve and the motor controller, and the motor controller and the main controller are located below the smoke exhaust device.

The utility model discloses a gas heater is through setting up low nitrogen burner and setting up fume extractor in low nitrogen burner and heat exchange device's top to strengthened the connection leakproofness between each device, not only effectively reduced the poisonous and harmful gas's of nitrogen oxide in gas heater's the flue gas emission from this, still greatly reduced the noise that gas heater produced, improved user's use satisfaction.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural view of a gas water heater according to an embodiment of the present invention;

FIG. 2 is a partial schematic structural view of FIG. 1, wherein a schematic structural view of a low nitrogen combustion device, a heat exchange device and a smoke exhaust device of the gas water heater of FIG. 1 is shown;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a front view of FIG. 2;

FIG. 5 is a cross-sectional view of FIG. 4;

FIG. 6 is an enlarged partial schematic view of the location I of FIG. 5;

FIG. 7 is a schematic enlarged view of a portion of FIG. 5 at position II;

FIG. 8 is a schematic structural view of the low-nitrogen combustion apparatus of FIG. 2;

fig. 9 is an exploded view of the installation of the low-nitrogen combustion apparatus of fig. 8.

Description of the reference numerals

1 Low NOx burner 11 burner housing Assembly

111 burner intake 1111 upper exhaust port

1112 bottom row of air inlets 112

113 top peripheral flange 114 first shell member

115 second housing piece 12 thick and thin combustion fire row

2 fume extractor 21 fume extraction cavity

22 fan assembly 221 drives a fan impeller

222 driving motor 3 heat exchange device

31 bottom peripheral edge flanging 32 smoke exhaust end peripheral edge flanging

4 annular seal 41 secondary air through hole

5 circumferential connecting flange 51 flange body part

52 inner end upturned portion of flange 52 and outer end downturned portion of flange 53

6 gas proportional valve 7 motor controller

8 Main controller

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present invention.

The gas water heater according to the present invention is described below with reference to the accompanying drawings, which is simple and reasonable in structure, good in sealing performance, low in noise and low in nitrogen oxide emission.

As shown in fig. 1-5, the utility model discloses a gas water heater includes from last low nitrogen combustion device 1, fume extractor 2 and the heat exchange device 3 that arranges in proper order down, and fume extractor 2 sets up in low nitrogen combustion device 1's top promptly, and heat exchange device 3 sets up between low nitrogen combustion device 1 and fume extractor 2. The low-nitrogen combustion device 1 comprises a combustion device shell assembly 11 and a plurality of thick and thin combustion fire rows 12 arranged in the combustion device shell assembly 11; the smoke exhaust device 2 comprises a smoke exhaust cavity 21 and a fan assembly 22 arranged at the smoke exhaust end of the smoke exhaust cavity 21; the heat exchanger 3 comprises a smoke evacuation connection end sealingly connected to the smoke inlet end of the upper smoke evacuation chamber 21 and a burner connection end sealingly connected to the lower burner housing 11.

The existing low-nitrogen emission type gas water heater mostly adopts a thick and thin burner structure and places a fan under a combustion system part, and is a strong drum type combustion mode. Because the mode that adopts the fan to put down, its combustion system and heat transfer system and exhaust fume channel are malleation, and it produces great pressure differential in combustion system, if will improve the amount of wind, then will improve the rotational speed of fan. The operation of the fan is a main source of larger noise generated by the gas water heater, and the larger the rotating speed of the fan is, the larger the noise generated by the gas water heater is.

Compare in current low nitrogen emission type water heater, the utility model discloses a gas heater is through setting up low nitrogen burner 1 and setting up fume extractor 3 in low nitrogen burner 1 and heat exchange device 3's top, and overall structure is simple reasonable, and fume extractor 3 provides the required air amount of burning through convulsions for low nitrogen burner 1. The interior of the combustion chamber of the low-nitrogen combustion device 1 is always in a negative pressure state, the air flow field near the low-nitrogen combustion device 1 is relatively uniform in structure of downward blast air, and air uniformity adjustment is not needed to be carried out through an air equalizing plate, so that a high-pressure area formed by pressure difference due to the adoption of the air equalizing plate is avoided. The amount of air combusted in the low-nitrogen combustion device 1 can be maintained only by relatively low fan rotating speed, so that the noise in the operation process of the machine is greatly reduced. The utility model discloses a gas heater is corresponding has still strengthened the connection leakproofness between each device, has not only effectively reduced the toxic and harmful gas's of nitrogen oxide in gas heater's the flue gas emission from this, also greatly reduced the noise that gas heater produced, improved user's use satisfaction.

Optionally, in order to further adapt to the combustion requirement of the low-nitrogen combustion device, the utility model discloses a gas water heater is including setting up combustor air inlet 111 on burner housing assembly 11 and setting up the combustor exhaust port at the end of discharging fume, still includes the leakproofness of sealed outer casing part in order to strengthen gas water heater between combustor air inlet 111 and the combustor exhaust port. Wherein, the utility model discloses a sealed outer casing portion of gas heater can be including setting up the first sealing connection portion between burner housing 11 and heat exchange device 3's combustor link to and set up the second sealing connection portion between the end of discharging fume of advancing cigarette end and heat exchange device 3 of cavity 21 of discharging fume, first sealing connection portion and second sealing connection portion will be detailed respectively below.

In some embodiments, the first sealing connection is as shown in fig. 6 and 8, the burner housing assembly 11 is formed with a tip port 112 and a burner inlet 111 disposed at a side wall of the burner housing assembly 11, the plurality of thick and thin combustion rows 12 are disposed in the burner housing assembly 11, and the smoke generated by the combustion of the thick and thin combustion rows 12 is discharged to the burner connection end of the heat exchange device 3 through the tip port 112. In order to hermetically connect the burner housing 11 and the burner connection end of the heat exchanger 3, a top peripheral flange 113 is formed on the peripheral edge of the top port 112, a bottom peripheral flange 31 is formed on the burner connection end, and the top peripheral flange 113 and the bottom peripheral flange 31 are in sealing contact with each other.

In order to further enhance the sealing performance between the burner housing 11 and the burner connection end of the heat exchanger 3, as shown in fig. 6, the gas water heater of the present invention may further include an annular sealing member 4, wherein the annular sealing member 4 may be integrally disposed or separately disposed according to the actual production and assembly requirements. The annular sealing element 4 is arranged between the top peripheral flange 113 and the bottom peripheral flange 31 in a cushioning manner, and the bottom end of the annular sealing element 4 extends into the top end through hole 112 and is in sealing fit with the inner peripheral wall of the top end through hole 112, so that the sealing performance of the first sealing connecting part can be further enhanced. In addition, the top week still can set up other seal gaskets commonly used between the flanging 113 and the bottom week edge flanging 31 and increase the leakproofness, the utility model discloses be not limited to this. Also, the abutting portions of the top peripheral flange 113, the annular seal 4 and the bottom peripheral flange 31 may be fixedly connected by a fixing member such as a screw.

Further, in order to further completely burn the gas, the bottom end of the ring seal 4 may be provided with a secondary air passing hole 41.

In some embodiments, as shown in fig. 7, the smoke exhaust connection end may be provided with a smoke exhaust end peripheral flange 32, the smoke exhaust end peripheral flange 32 is fixedly mounted with a circumferential connection flange 5, the circumferential connection flange 5 forms a spigot seal connection with the smoke inlet end of the smoke exhaust cavity 21, so that the smoke entering the heat exchange device 3 can be exhausted to the smoke exhaust cavity 21 of the smoke exhaust device 2 through the circumferential connection flange 5 without leakage.

Alternatively, as shown in fig. 7, the circumferential connecting flange 5 may include a flange body 51, a flange inner end upturned portion 52 and a flange outer end downturned portion 53, the flange body 51 is laminated on the smoke exhaust end circumferential flange 32, and the bottom edge of the smoke exhaust end is in sealing contact with the flange body 51; the flange inner end upturned portion 52 is integrally upturned from the inner end of the flange body portion 51 and extends into the smoke evacuation chamber 21, and the flange outer end downturned portion 53 is integrally downwardly extended from the outer end of the flange body portion 51. The peripheral edge of the smoke discharging end is fixedly connected with the flange body 51 by a fixing component such as a screw or the like. In addition, still can set up other seal gaskets commonly used or sealing material between the end of discharging fume peripheral flange flanging 32 and flange body part 51 and between circumferential flange 5 and the end of advancing the cigarette end and increase the leakproofness, the utility model discloses be not limited to this.

Of course, the first sealing connection portion is not limited to the manner of using the sealing gasket, and other sealing manners such as flange connection may also be used, and the second sealing connection portion is not limited to the manner of flange connection, and other sealing manners such as the sealing gasket may also be used, which is not limited to this.

Further, as shown in FIG. 5, the fan assembly 22 may include a drive motor 222 for driving the fan wheel 221, and the drive motor 222 may be an AC drive motor. As can be understood by those skilled in the art, the low-nitrogen-emission water heater with the underneath fan generally needs to be configured with a direct-current stepless speed-regulating motor with higher cost due to large blast resistance and the need to meet the performance index of low nitrogen emission. And the utility model discloses a gas heater is owing to adopt the form of fan overhead, and driving motor 222 not only can adopt the electrodeless speed regulating motor of direct current, still can adopt the lower AC drive motor of cost to come reduction in production cost.

In addition, as shown in fig. 1 to 5, the smoke exhaust device 2 further includes a smoke exhaust pipe connected to the external smoke exhaust channel, and a sealed smoke pipe connecting pipe is installed between the smoke exhaust pipe and the external smoke exhaust channel.

Further, the burner housing assembly 11 may include a first housing piece 114 and a second housing piece 115 assembled in a splicing manner, the burner inlet 111 includes an upper row of inlet ports 1111 and a lower row of inlet ports 1112 provided on a side wall of the first housing piece 114, the rich-lean combustion fire rows 12 are provided in a surrounding cavity of the second housing piece 115, each rich-lean combustion fire row 12 includes a rich-flame burner unit 121 and a lean-flame burner unit 122, one of the rich-flame burner unit 121 and the lean-flame burner unit 122 is connected to the upper row of inlet ports 1111, and the other is connected to the lower row of inlet ports 1112. As shown in fig. 8 and 9, the rich flame burner unit 121 is provided with a small supply intake passage connected to the upper row intake 1111 in correspondence thereto, and the lean flame burner unit 122 is provided with a large supply intake passage connected to the lower row intake 1112 in correspondence thereto. Wherein, the quantity of the thick and thin burning fire row 12, the small supply air inlet channel and the large supply air inlet channel can be selected to be 10, and of course, the setting can also be adapted according to the actual burning power of the gas water heater.

Furthermore, the heat exchange device 3 may be a coiled water tank or a non-coiled water tank.

Optionally, the gas water heater may include a gas proportional valve 6 disposed between the low-nitrogen combustion device 1 and the gas supply line and located below the low-nitrogen combustion device 1, a motor controller 7 for controlling the smoke exhaust device 2, and a main controller 8, the main controller 8 is connected to the gas proportional valve 6 and the motor controller 7, respectively, and the motor controller 7 and the main controller 8 are located below the smoke exhaust device 2. The utility model discloses a gas heater overall structure is simple reasonable, whole small, practice thrift complete machine manufacturing cost.

To sum up, the utility model provides a novel gas water heater, this gas water heater is through setting up low nitrogen burner 1 and setting up fume extractor 3 in low nitrogen burner 1 and heat exchange device 3's top, and overall structure is simple reasonable. Low nitrogen combustion apparatus 1 has effectively reduced the emission of the poisonous and harmful gas of nitrogen oxide in gas heater's the flue gas, and fume extractor 3 provides the required air quantity of burning for low nitrogen combustion apparatus 1 through convulsions to greatly reduced the noise of machine operation in-process, improved user's use satisfaction. Furthermore, the utility model discloses a gas heater is owing to adopt the form of fan overhead, and driving motor 222 can adopt the lower AC drive motor of cost to come reduction in production cost. And, the utility model discloses a gas heater is whole small, practice thrift complete machine manufacturing cost.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A gas water heater, comprising:

the low-nitrogen combustion device comprises a combustion device shell assembly and a plurality of thick and thin combustion fire rows arranged in the combustion device shell assembly;

the smoke exhaust device is arranged above the low-nitrogen combustion device and comprises a smoke exhaust cavity and a fan assembly arranged at the smoke exhaust end of the smoke exhaust cavity; and

the heat exchange device is arranged between the low-nitrogen combustion device and the smoke exhaust device and comprises a smoke exhaust connecting end which is connected with the smoke inlet end of the smoke exhaust cavity above the heat exchange device and a combustor connecting end which is connected with the combustion device shell below the smoke exhaust connecting end in a sealing manner.

2. The gas water heater of claim 1, including a burner air inlet disposed on the burner housing assembly, a burner smoke outlet disposed at the smoke exhaust end, and a sealed outer housing portion between the burner air inlet and the burner smoke outlet.

3. The gas water heater of claim 2, wherein the burner housing assembly is formed with a top port and the burner inlet disposed in a sidewall of the burner housing assembly, a perimeter of the top port is formed with a top perimeter flange, and the burner connection end is formed with a bottom perimeter flange that sealingly abuts against the top perimeter flange.

4. The gas water heater of claim 3, wherein an annular seal is disposed between the top peripheral flange and the bottom peripheral flange, and a bottom end of the annular seal extends into the top port and is sealingly engaged with an inner peripheral wall of the top port.

5. The gas water heater of claim 4, wherein the bottom end of the annular seal is provided with secondary air passing holes.

6. The gas water heater according to any one of claims 2 to 5, wherein the smoke exhaust connecting end is provided with a smoke exhaust end peripheral flanging, a circumferential connecting flange is fixedly mounted on the smoke exhaust end peripheral flanging, and the circumferential connecting flange is in sealing connection with a smoke inlet end of the smoke exhaust cavity.

7. The gas water heater of claim 6, wherein the circumferential attachment flange comprises:

the flange body part is laminated on the outward turning edge of the peripheral edge of the smoke exhaust end, and the bottom edge of the smoke exhaust end is in sealing butt joint with the flange body part;

the inner end of the flange is turned up, and the flange is integrally turned up from the inner end of the flange body part and extends into the smoke exhaust cavity; and

and the flange outer end downward flanging part integrally extends downwards from the outer end of the flange body part.

8. The gas fired water heater of claim 1, wherein the fan assembly includes a drive motor for driving a fan impeller, the drive motor being an ac drive motor.

9. The gas water heater of claim 1, wherein the burner housing assembly includes first and second housing pieces assembled in a splicing arrangement, the burner inlet includes upper and lower rows of inlet openings disposed on a side wall of the first housing piece, the low-nitrogen combustion rows are disposed in a surrounding cavity of the second housing piece, each of the low-nitrogen combustion rows includes a rich flame burner unit and a lean flame burner unit, one of the rich flame burner unit and the lean flame burner unit is connected to the upper row of inlet openings, and the other is connected to the lower row of inlet openings.

10. The gas water heater of claim 1, including a gas proportional valve disposed between the low nitrogen combustion device and the gas supply line and below the low nitrogen combustion device, a motor controller controlling the smoke exhaust device, and a main controller connected to the gas proportional valve and the motor controller, respectively, the motor controller and the main controller being located below the smoke exhaust device.

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