CN217423626U - Anti-downdraft device of gas water heater and gas water heater - Google Patents

Abstract

The utility model relates to a gas heater prevents down-draft device and gas heater, gas heater prevent down-draft device include chimney, first guide plate, second guide plate and rotation axis, the rotation axis is located in the inner chamber of chimney, first guide plate with the second guide plate is rotationally located just can cover on the rotation axis and close the inner chamber of chimney, the area of coverage of first guide plate is greater than the area of coverage of second guide plate. The utility model provides a down-draft prevention device of gas heater and gas heater can improve the emission problem of flue gas effectively.

Description

Anti-downdraft device of gas water heater and gas water heater

Technical Field

The utility model relates to the water heater field especially relates to a gas heater prevents down draught device and gas heater.

Background

In some prior art, the anti-downdraft device of a gas water heater usually uses two baffles 2 with the same size in a chimney 1, as shown in fig. 1. However, by performing simulation calculation in the impeller area of the fan by using the MRF model, under the condition that the rotation speed is 2000rpm, it can be seen in the speed cloud chart obtained by simulation that the wind speed at the smoke outlet of the fan is in a left-right non-uniform distribution state, and thus it can be known that the smoke flow is also in a left-right non-uniform distribution state. Therefore, the existing anti-downdraft device is not beneficial to the emission of smoke.

SUMMERY OF THE UTILITY MODEL

The utility model provides a first technical problem who solves provides a gas heater prevents down draught device, and it can improve the emission problem of flue gas effectively.

The second technical problem solved by the utility model is to provide a gas water heater, which can effectively improve the emission problem of flue gas.

The first technical problem is solved by the following technical scheme:

a down draft prevention device of a gas water heater comprises: chimney, first guide plate, second guide plate and rotation axis, the rotation axis is located in the inner chamber of chimney, first guide plate with the second guide plate is rotationally located just can the lid close on the rotation axis the inner chamber of chimney, the area of coverage of first guide plate is greater than the area of coverage of second guide plate.

Gas heater prevent down draught device compare with the background art, the beneficial effect who has does: according to the speed distribution of wind at the outlet of the fan, the first guide plate and the second guide plate are designed in a left-right asymmetric mode, so that the smoke is guided, and the smoke discharged from the gas water heater can be discharged outdoors better according to the speed distribution of wind in the fan.

In one embodiment, the ratio of the footprint of the first baffle to the footprint of the second baffle is a: 1, wherein A is more than or equal to 2 and less than or equal to 3.

Preferably, the ratio of the area covered by the first baffle to the second baffle is 20: 7.

In one embodiment, still include spacing, spacing is erect in the inner chamber of chimney to with the fixed cooperation of the inner chamber of chimney, spacing includes the solid fixed ring, gu have first spacing portion and the spacing portion of second on the fixed ring, when first guide plate is the lid and closes the state, first spacing portion supports first guide plate, when second guide plate is the lid and closes the state, the spacing portion of second supports the second guide plate.

In one embodiment, the limiting frame further comprises a cross beam, the cross beam is arranged between the first limiting portion and the second limiting portion, the cross beam and the first limiting portion define a first smoke exhaust hole corresponding to the first guide plate, the cross beam and the second limiting portion define a second smoke exhaust hole corresponding to the second guide plate, and the rotating shaft is arranged above the cross beam.

In one embodiment, the width of the cross beam is d, and d is more than or equal to 2mm and less than or equal to 7 mm.

In one embodiment, the smoke exhaust device further comprises a first rubber gasket and a second rubber gasket which are respectively arranged in the first smoke exhaust hole and the second smoke exhaust hole, when the first guide plate and the second guide plate are in a covering state, the first guide plate is attached to the first rubber gasket to cover the first smoke exhaust hole, and the second guide plate is attached to the second rubber gasket to cover the second smoke exhaust hole.

In one embodiment, the outer sides of the first rubber gasket and the second rubber gasket are provided with grooves, and the fixing ring and the cross beam are embedded into the grooves.

In one embodiment, the width of the cross beam is the sum of the depths of the grooves which are matched with the first rubber gasket and the second rubber gasket in an embedded mode.

The second technical problem is solved by the following technical scheme:

a gas water heater comprises the anti-downdraft device of any one of the gas water heaters.

Compared with the prior art, the gas water heater has the advantages that: according to the velocity distribution of fan exit wind, adopt asymmetric design about first guide plate and second guide plate to carry out the drainage to the flue gas, make exhaust flue gas among the gas heater can be according to the better discharge of the velocity distribution of fan apoplexy outdoor.

Drawings

FIG. 1 is a schematic structural view of a down draft prevention device of a gas water heater in the prior art;

FIG. 2 is a schematic structural view of the gas water heater of the present invention showing the closing of the air deflector of the anti-downdraft device;

FIG. 3 is a top view of FIG. 2;

fig. 4 is a schematic structural view of the anti-downdraft device of the gas water heater according to the present invention;

fig. 5 is a schematic structural view of the down draft prevention device of the present invention installed on a gas water heater;

fig. 6 is a schematic structural view of the limiting frame.

Description of the reference symbols:

1: a chimney;

2: a baffle, 21: first baffle, 22: a second baffle;

3: a rotating shaft;

4: spacing frame, 41: fixing ring, 42: a cross beam;

51: first rubber gasket, 52: a second rubber gasket;

6: smoke exhaust fan, 61: and (7) an air outlet pipe.

Detailed Description

The terms "first" and "second" are used for descriptive purposes only to distinguish between technical features having the same property and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

With reference to fig. 2 to 4, a down draft prevention device of a gas water heater comprises a chimney 1, a first guide plate 21, a second guide plate 22 and a rotating shaft 3, wherein the rotating shaft 3 is arranged in an inner cavity of the chimney 1, the first guide plate 21 and the second guide plate 22 are rotatably arranged on the rotating shaft 3 and can cover the inner cavity of the chimney 1, and the coverage area of the first guide plate 21 is larger than that of the second guide plate 22.

Through the design of the anti-downdraft device with the first guide plate 21 and the second guide plate 22 with different areas, the emission problem of smoke in the traditional gas water heater is improved, so that the smoke can be emitted more scientifically according to the speed of the wind at the smoke outlet of the fan in the gas water heater.

According to the distribution of the speed cloud chart of wind in the fan, in the actual discharge process, the coverage area of the first guide plate 21 is larger, and the corresponding flue gas flow is denser, so that a dense flue gas flow area is formed; the second guide plate 22 has a small coverage area, and the corresponding flue gas flow is sparse, so that a sparse flue gas flow area is formed. The ratio of the coverage area of the first baffle 21 to the second baffle 22 is between 2:1 and 3:1, preferably the area ratio of the two is 20: 7.

in one embodiment, a limiting frame 4 may be disposed in the inner cavity of the smoke tube 1 and fixedly engaged with the inner cavity of the smoke tube, and the limiting frame 4 includes a fixing ring 41 and a cross beam 42. The fixing ring 41 is divided into two parts, namely a first limiting part and a second limiting part, and when the first guide plate 21 is in a covering state, the first limiting part supports the first guide plate 21; when the second guide plate 22 is in a covering state, the second limiting portion supports the second guide plate 22. By adding the fixing ring 41, the movable areas of the first guide plate 21 and the second guide plate 22 can be limited to move only above the limiting part.

In addition, as shown in fig. 6, the limiting frame 4 is further provided with a cross beam 42 between the first limiting portion and the second limiting portion, the cross beam 42 and the first limiting portion form a first smoke exhaust hole corresponding to the first flow guide plate 21, and the cross beam 42 and the second limiting portion form a second smoke exhaust hole corresponding to the second flow guide plate 22. The cross member 42 is located directly below the rotary shaft 3. The first smoke exhaust hole and the second smoke exhaust hole are used for exhausting smoke.

In one embodiment, the anti-backflow device of the gas water heater further comprises a first rubber gasket 51 and a second rubber gasket 52, wherein the first rubber gasket 51 is arranged in the first smoke exhaust hole, and the second rubber gasket 52 is arranged in the second smoke exhaust hole. When the first guide plate 21 and the second guide plate 22 are in a covering state, the first guide plate 21 and the second guide plate 22 are respectively attached to the first rubber gasket 51 and the second rubber gasket 52 in a sealing manner. So that the outer edge of the baffle 2 can be sealed to prevent the inflow of air.

In one embodiment, the outer sides of the first rubber gasket 51 and the second rubber gasket 52 are both provided with a groove, and when the first rubber gasket 51 is arranged in the first smoke exhaust hole, the fixing ring 41 and the cross beam 42 are both embedded in the groove of the first rubber gasket 51, so that the first rubber gasket 51 is installed; when the second rubber gasket 52 is arranged in the second smoke exhaust hole, the fixed ring 41 and the cross beam 42 are both embedded into the groove of the second rubber gasket 52, so that the second rubber gasket 52 is installed; because the first rubber gasket 51 and the second rubber gasket 52 are jointly fixed by the fixing ring 41 and the cross beam 42, on the basis of meeting the installation requirement, the width of the fixing ring 41 and the width of the cross beam 42 are designed to be narrower, so that the aperture of the first smoke exhaust hole and the aperture of the second smoke exhaust hole are as large as possible, and the better smoke exhaust effect is ensured.

It is reasonable to design the width d of the cross beam 42 to be set between 2mm and 7 mm. d is too small, the first rubber gasket 51 and the second rubber gasket 52 are not stably installed; too large a value of d would create an unnecessary obstruction to the flow of the flue gas stream.

In some other embodiments, not shown, the width of the cross beam 42 may also be the sum of the depths of the grooves of the first rubber gasket 51 and the second rubber gasket 52 that are engaged with the cross beam 42. That is, in this embodiment, the cross member 42 is completely fitted into the grooves of the first and second rubber gaskets 51 and 52 on both sides.

Furthermore, chimney 1, can insert for upper and lower establishing complex chimney 1, this kind is inserted and is established the design for integrated into one piece's chimney, simple process, the processing of being convenient for. However, the present invention is not limited to the chimney 1 inserted and engaged vertically, as long as the purpose of the present invention can be achieved, and the effects of the present invention can be achieved.

With reference to fig. 5, a gas water heater includes the anti-downdraft device of any one of the above gas water heaters.

Above-mentioned gas heater adopts asymmetric first guide plate 21, second guide plate 22 according to the velocity profile of fan exit wind to carry out the drainage to the flue gas, make exhaust flue gas among the gas heater can be according to the better discharge of the velocity profile of fan apoplexy outdoor.

In one embodiment, the gas water heater further comprises a smoke exhaust fan 6, and the lower part of the chimney 1 is connected with an air outlet pipe 61 of the smoke exhaust fan 6 in a communication manner so as to help the gas water heater to exhaust smoke.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The details of the foregoing embodiments are merely representative of several embodiments of the present invention, which are described in more detail and detail, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The utility model provides a gas heater's down draught prevention device which characterized in that includes: chimney (1), first guide plate (21), second guide plate (22) and rotation axis (3), rotation axis (3) are located in the inner chamber of chimney (1), first guide plate (21) with second guide plate (22) are rotationally located on rotation axis (3) and can cover the inner chamber of chimney (1), the area covered of first guide plate (21) is greater than the area covered of second guide plate (22).

2. The anti-downdraft device of a gas water heater according to claim 1, wherein a ratio of a coverage area of the first baffle plate (21) to a coverage area of the second baffle plate (22) is a: 1, wherein A is more than or equal to 2 and less than or equal to 3.

3. The anti-downdraft device of a gas water heater according to claim 2, wherein a ratio of a coverage area of the first baffle plate (21) to a coverage area of the second baffle plate (22) is 20: 7.

4. the anti-downdraft device of the gas water heater according to claim 1, wherein: still include spacing (4), spacing (4) are located the inner chamber of chimney (1), and with the inner chamber fixed coordination of chimney (1), spacing (4) are including solid fixed ring (41), gu have first spacing portion and the spacing portion of second on fixed ring (41), when first guide plate (21) are the lid and close the state, first spacing portion supports first guide plate (21), when second guide plate (22) are the lid and close the state, the spacing portion of second supports second guide plate (22).

5. The anti-downdraft device of the gas water heater according to claim 4, wherein: the limiting frame (4) further comprises a cross beam (42), the cross beam (42) is arranged between the first limiting portion and the second limiting portion, the cross beam (42) and the first limiting portion enclose a first smoke exhaust hole corresponding to the first guide plate (21), the cross beam (42) and the second limiting portion enclose a second smoke exhaust hole corresponding to the second guide plate (22), and the rotating shaft (3) is arranged above the cross beam (42).

6. The anti-downdraft device of the gas water heater according to claim 5, wherein: the width of the cross beam (42) is d, and d is more than or equal to 2mm and less than or equal to 7 mm.

7. The anti-downdraft device of the gas water heater according to claim 5, wherein: still including locating first rubber packing ring (51), the second rubber packing ring (52) in first smoke exhaust hole, second smoke exhaust hole respectively, when first guide plate (21) and second guide plate (22) are the lid and close the state, first guide plate (21) with laminating of first rubber packing ring (51) covers first smoke exhaust hole, laminating of second guide plate (22) and second rubber packing ring (52) covers the second smoke exhaust hole.

8. The anti-downdraft device of the gas water heater according to claim 7, wherein: the outer sides of the first rubber gasket (51) and the second rubber gasket (52) are provided with grooves, and the fixing ring (41) and the cross beam (42) are embedded into the grooves.

9. The anti-downdraft device of the gas water heater according to claim 8, wherein: the width of the cross beam (42) is the sum of the depths of grooves which are formed in the first rubber gasket (51) and the second rubber gasket (52) and matched with the cross beam (42) in an embedded mode.

10. A gas water heater comprising the down draft prevention device of the gas water heater as claimed in any one of claims 1 to 9.

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