Exhaust fume collecting hood and gas water heating equipment comprising same

Abstract

The utility model provides an exhaust fume collecting hood and gas water heating equipment comprising the exhaust fume collecting hood. The smoke collecting hood comprises a hood shell used for collecting smoke, a smoke exhaust pipe extending upwards from the hood shell, and a baffle assembly fixedly contained in the smoke exhaust pipe. The baffle assembly comprises a support fixedly installed in the smoke exhaust pipe, a rotating shaft arranged on the support and a pair of baffles which are arranged on the rotating shaft in a pivoted mode and can be opened and closed. The support is further provided with a limiting piece which extends upwards and abuts against the pair of baffles when the pair of baffles are clamped so as to limit the minimum clamping angle between the pair of baffles. By arranging the limiting piece, the baffle cannot cross the rotating shaft to be overlapped with the baffle on the other side after being blown up, and therefore the baffle can smoothly fall back to the original closing position.

Description

Technical Field

[0001] This disclosure pertains to the field of household gas appliances, specifically relating to a smoke hood for a gas-fired water heater.

[0002] This disclosure also relates to a gas-fired hot water device employing the aforementioned smoke hood. Background Technology

[0003] Household gas-fired water heating equipment includes gas water heaters and gas boilers. These systems typically have a fume hood connected to a flue pipe to collect and vent the exhaust gases (containing carbon monoxide and nitrogen oxides) produced during combustion. The fume hood usually contains an openable baffle that opens during exhaust and closes when the equipment is not in operation to prevent external objects from entering. However, existing baffles often fail to return to their original closed position smoothly after opening, potentially allowing external objects to enter the equipment and hindering subsequent exhaust. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this disclosure provides a smoke hood with a smoothly opening and closing baffle, and a gas-fired hot water device using the above-mentioned smoke hood.

[0005] A first aspect of this disclosure provides a smoke hood, comprising a housing for collecting smoke, an exhaust pipe extending upward from the housing, and a baffle assembly fixedly housed within the exhaust pipe. The baffle assembly includes a bracket fixedly mounted within the exhaust pipe, a pivot mounted on the bracket, and a pair of baffles pivotally mounted on the pivot and openable / closable. The bracket also includes an upwardly extending limiting member that abuts against the pair of baffles when they are clamped together, thereby limiting a minimum clamping angle between the pair of baffles.

[0006] In some embodiments, the bracket is provided with a connecting portion, and the connecting portion has a through hole for the rotating shaft to extend through; the aforementioned limiting member extends upward from the connecting portion.

[0007] In some embodiments, the limiting member has a pair of inclined sides that can abut against the pair of baffles respectively; the included angle formed between the pair of sides is equal to the minimum clamping angle.

[0008] In some embodiments, the minimum clamping angle is in the range of 10 to 15 degrees.

[0009] Preferably, the minimum clamping angle is in the range of 13 to 14 degrees.

[0010] In some embodiments, a limiting member height is defined between the center of the through hole of the connector and the top of the limiting member, and the limiting member height is in the range of 2 to 15 mm.

[0011] Preferably, the height of the limiting member is in the range of 4 to 10 mm.

[0012] In some embodiments, the bracket has a pair of side arms and an arcuate arm connecting the pair of side arms, the arcuate arm being fixedly connected to the inner circumferential wall of the exhaust pipe; there are two connecting parts and two limiting members, which are arranged in pairs on the pair of side arms.

[0013] In some embodiments, the cover is in the shape of an inverted box, with a sealing strip around its bottom perimeter and a pair of mounting brackets fixedly connected to its two sides.

[0014] Another aspect of the present disclosure provides a gas-fired water heater, which includes a housing, a burner housed within the housing for burning a mixture of gas and air, a heat exchanger that absorbs heat generated by the burner and transfers the heat to water flowing through it, and a smoke hood for collecting and discharging the flue gas generated during combustion.

[0015] The technical solutions provided by one or more embodiments of this disclosure may include the following beneficial effects: by setting a limiting member, the baffle will not cross the pivot and overlap with the baffle on the other side after it is blown up, so that it can fall back to the original closed position smoothly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a gas-fired water heater according to one embodiment of the present disclosure;

[0018] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the smoke hood of the gas-fired water heater shown;

[0019] Figure 3 yes Figure 2 The diagram shown is a three-dimensional exploded view of the smoke hood.

[0020] Figure 4 yes Figure 3 A three-dimensional schematic diagram of the bracket for the baffle assembly in the smoke hood shown;

[0021] Figure 5 yes Figure 3 The diagram shows a three-dimensional representation of the baffle assembly in the smoke hood, where the baffle is open and at its minimum clamping angle.

[0022] Figure 6 and Figure 2 The diagram shows a cross-sectional view of the smoke hood, with the baffle open and at its minimum clamping angle. Detailed Implementation

[0023] The embodiments shown will now be described in detail with reference to the accompanying drawings. However, these embodiments do not represent all embodiments consistent with this disclosure, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection claimed in the appended claims.

[0024] Gas-fired water heating equipment uses combustible gases as fuel, such as natural gas, city gas, liquefied petroleum gas, and biogas, to provide heat to meet users' living needs. Examples include gas water heaters that provide domestic hot water, or gas boilers that can provide both domestic hot water and heating.

[0025] like Figure 1 As shown, a gas-fired water heater 100 typically includes a housing 30, a burner housed within the housing for burning a mixture of gas and air, a heat exchanger that absorbs heat generated by the burner and transfers the heat to the water flowing through it, and a fume hood for collecting and discharging the flue gas generated during combustion. Since the structure and working principle of gas-fired water heaters are well known to those skilled in the art, the applicant will not elaborate further here.

[0026] Reference Figure 2 and Figure 3 As shown, the smoke hood 13 includes a housing 11 for collecting smoke, an exhaust pipe 21 extending upward from the housing, and a baffle assembly fixedly housed within the exhaust pipe. The housing 11 is in the shape of an inverted box, with a sealing strip 13 around its bottom perimeter, and a pair of mounting brackets 12 fixedly connected to its two sides. The exhaust pipe 21 is cylindrical, protruding from the top of the housing 11 and extending vertically upward. The baffle assembly includes a bracket 22 fixedly installed within the exhaust pipe 13, a pivot 23 mounted on the bracket, and a pair of baffles 24 pivotally mounted on the pivot and capable of being opened and closed.

[0027] Reference Figures 4 to 6As shown, the bracket 22 has a pair of side arms 2211 and an arc-shaped arm 2212 connecting the pair of side arms. The arc-shaped arm 2212 can be fixedly connected to the inner circumference of the exhaust pipe 21 by welding, riveting, screw connection, etc. The bracket 22 is also provided with a limiting member 223 that extends upward and abuts against the pair of baffles 24 when they are clamped to limit the minimum clamping angle between the pair of baffles. In this embodiment, the bracket 22 is also provided with two connecting parts 222, which are paired and protrude from the pair of side arms 2211; each connecting part 222 has a through hole 2221, and the rotating shaft 23 extends through the through hole 2221 of the connecting part, with its two ends protruding out of the through hole 2221. Each baffle 24 is approximately semi-circular so that when closed, it can form a full circle with a cross-sectional area equivalent to that of the cylindrical exhaust pipe 21, thereby sealing the exhaust pipe to prevent external objects from entering. The joint of the pair of baffles 24 is fitted onto the pivot 23 and located between the pair of connecting parts 222, so that it can be opened and closed like a hinge.

[0028] There can be one or two limiting members. In this embodiment, there are two limiting members 223, each extending upward from the pair of connecting portions 222. The limiting member 223 is generally inverted triangular in shape, having a pair of obliquely extending sides that can abut against the pair of baffles 24 respectively. Figure 5 and Figure 6 As shown, an included angle α is formed between the two sides, which is equal to the minimum clamping angle formed when the pair of baffles 24 are fully open. To ensure smooth smoke exhaust while maintaining combustion efficiency, in some embodiments, the minimum clamping angle is in the range of 10 to 15 degrees, such as 10, 11, 12, 13, 14, 15 degrees, etc.; preferably, the minimum clamping angle is in the range of 13 to 14 degrees, such as 13, 13.5, 14 degrees, etc. Figure 6 As shown, a limiting member height h is defined between the center of the through hole 2221 of the connecting part and the top of the limiting member 223. To prevent the baffle 24 from getting stuck on the limiting member when it is fully opened and unable to fall back smoothly, the limiting member height h is in the range of 2 to 15 mm, preferably in the range of 4 to 10 mm, such as 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc.

[0029] By setting a limiting component, the baffle will not cross the pivot and overlap with the baffle on the other side after it is blown up, so that it can fall back smoothly to the original closed position.

[0030] In the description of the above embodiments in this disclosure, the orientations or positional relationships indicated by terms such as "longitudinal," "lateral," "vertical," "radial," "circumferential," "horizontal," "length," "width," "thickness," "upper," "lower," "left," "right," "front," and "rear" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. In the above description, terms such as "several," "multiple," etc., mean at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In the foregoing disclosure, unless otherwise expressly specified and limited, the terms "installation," "adjacent," "connected," "linked," and "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. For those skilled in the art, the specific meaning of the above terms in this disclosure can be understood according to the specific circumstances.

[0032] In the above disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature and the second feature are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A smoke collection hood, comprising a housing for collecting smoke, a smoke exhaust pipe extending upward from the housing, and a baffle assembly fixedly housed within the smoke exhaust pipe; characterized in that: The baffle assembly includes a bracket fixedly installed inside the exhaust pipe, a rotating shaft disposed on the bracket, and a pair of baffles pivotally disposed on the rotating shaft and capable of opening and closing; the bracket is also provided with a limiting member that extends upward and abuts against the pair of baffles when the pair of baffles are clamped to limit the minimum clamping angle between the pair of baffles.

2. The smoke collection hood according to claim 1, characterized in that: The bracket is provided with a connecting part, and the connecting part has a through hole for the rotating shaft to extend through; the aforementioned limiting member extends upward from the connecting part.

3. The smoke collection hood according to claim 1, characterized in that: The limiting member has a pair of inclined sides that can abut against the pair of baffles respectively; the included angle formed between the pair of sides is equal to the minimum clamping angle.

4. The smoke collection hood according to claim 1 or 3, characterized in that: The minimum clamping angle is in the range of 10 to 15 degrees.

5. The smoke collection hood according to claim 4, characterized in that: The minimum clamping angle is in the range of 13 to 14 degrees.

6. The smoke collection hood according to claim 2, characterized in that: A limiting member height is defined between the center of the through hole of the connecting part and the top of the limiting member, and the limiting member height is in the range of 2 to 15 mm.

7. The smoke collection hood according to claim 6, characterized in that: The height of the limiting component is in the range of 4 to 10 millimeters.

8. The smoke collection hood according to claim 2, characterized in that: The bracket has a pair of side arms and an arc-shaped arm connecting the pair of side arms. The arc-shaped arm is fixedly connected to the inner circumferential wall of the exhaust pipe. There are two connecting parts and two limiting parts, which are arranged in pairs on the pair of side arms.

9. The smoke collection hood according to claim 1, characterized in that: The cover is in the shape of an inverted box, with a sealing strip around its bottom perimeter, and a pair of mounting brackets fixedly connected to its two sides.

10. A gas-fired hot water device, characterized in that: The gas-fired water heater includes a housing, a burner housed within the housing for burning a mixture of gas and air, a heat exchanger that absorbs heat generated by the burner and transfers the heat to water flowing through it, and a smoke hood as described in any one of claims 1 to 9 for collecting and discharging the flue gas generated during combustion.

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