Fan unit assembly for gas water heater and gas water heater with same

Abstract

The application discloses a fan assembly for a gas water heater and a gas water heater with the same. The fan assembly for the gas water heater comprises a gas mixing pipe and a fan cover plate. The gas mixing pipe comprises a first gas inlet pipe, and a second gas inlet joint is arranged on the first gas inlet pipe, and the second gas inlet joint is communicated with a gas channel of the first gas inlet pipe. According to the fan assembly for the gas water heater, the gas mixing pipe is communicated with an air inlet and a gas inlet, and air and gas can be mixed in the first gas inlet pipe, so that the air and the gas can be mixed only by the gas mixing pipe without other components, the structure of the fan assembly is simple, and the air and the gas can be fully mixed in the first gas inlet pipe, so that the exhaust emission content of the gas water heater is low.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas water heaters, in particular, to a fan assembly for a gas water heater and a gas water heater with the same. BACKGROUND

[0002] In a gas water heater, whether the mixing effect of air and gas is sufficient affects whether the mixed gas can be fully combusted, which has a decisive influence on the content of harmful gas in the exhaust gas of the gas water heater. Therefore, it is necessary to ensure that the gas and air of the gas water heater are fully mixed. At present, a fan assembly with a Venturi sleeve embedded in the fan air inlet is generally used, but this matching method will cause the structure of the fan assembly to be complex, the processing difficulty to be great, and the volume of the fan assembly to be large. SUMMARY

[0003] The present application aims to at least solve one of the above technical problems in the prior art to some extent. To this end, the present application provides a fan assembly for a gas water heater, which is provided with a gas mixing pipe to ensure the full mixing of gas and air.

[0004] The present application also provides a gas water heater with the above-mentioned fan assembly for a gas water heater.

[0005] The fan assembly for a gas water heater according to the embodiments of the present application comprises a gas mixing pipe and a fan cover plate, the gas mixing pipe comprises a first gas inlet pipe having a gas inlet and a gas outlet, and a second gas inlet connector is arranged on the first gas inlet pipe, the second gas inlet connector is in communication with the gas passage of the first gas inlet pipe, the fan cover plate is provided with a cover plate opening, and the gas outlet is in communication with the cover plate opening.

[0006] The fan assembly for a gas water heater according to the embodiments of the present application, the gas mixing pipe communicates the air inlet and the gas inlet, and the air and the gas can be mixed in the first gas inlet pipe. Therefore, the mixing of the air and the gas can be realized by the gas mixing pipe only without other components, so as to ensure that the structure of the fan assembly is simple, and the air and the gas can be fully mixed in the first gas inlet pipe, so as to ensure that the content of the exhaust gas of the gas water heater is low.

[0007] According to some embodiments of the present application, the first gas inlet pipe is a Venturi pipe and comprises an inlet section, a converging section, a throat section and a diverging section connected axially in sequence, the inlet section has the inlet port at one end away from the converging section, the diverging section has the outlet port at one end away from the throat section, in the direction from the inlet port to the outlet port, the cross-sectional inner diameter of the inlet section is constant, the cross-sectional inner diameter of the converging section is gradually reduced, and the cross-sectional inner diameter of the diverging section is gradually increased, and the communication port of the second gas inlet connector with the first gas inlet pipe is located on the pipe wall of the throat section.

[0008] According to some embodiments of the present application, the first gas inlet pipe comprises a straight pipe section and a curved pipe section, the curved pipe section connects the straight pipe section and the cover plate port, and the communication port of the second gas inlet connector with the first gas inlet pipe is located on the straight pipe section.

[0009] Further, the curved angle of the curved pipe section is 60°-150°.

[0010] Specifically, the end of the second gas inlet connector away from the first gas inlet pipe is provided with a connecting element.

[0011] Specifically, the second gas inlet connector is a gas inlet connector with external threads.

[0012] According to some embodiments of the present application, the gas mixing pipe and the fan cover plate are integrally formed.

[0013] According to some embodiments of the present application, the gas mixing pipe and the fan cover plate are connected through a flange.

[0014] According to some embodiments of the present application, the first gas inlet pipe is an air inlet pipe, and the second gas inlet connector is a gas inlet connector.

[0015] According to another aspect of the embodiments of the present application, a gas water heater comprises the fan assembly for a gas water heater described above.

[0016] The gas water heater has the same advantages as the fan assembly for a gas water heater described above relative to the prior art, and thus will not be described here again.

[0017] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective view of the fan assembly of the first embodiment;

[0019] Figure 2is a perspective view of a mixing pipe of the fan unit assembly of the first embodiment;

[0020] Figure 3 is Figure 2 a half-section perspective view of the mixing pipe of the fan unit assembly of the first embodiment;

[0021] Figure 4 is a cross-sectional front view of the mixing pipe of the fan unit assembly of the first embodiment;

[0022] Figure 5 is a perspective view of the fan unit assembly of the second embodiment;

[0023] Figure 6 is an exploded perspective view of the mixing pipe and the fan cover plate of the fan unit assembly of the first embodiment;

[0024] Figure 7 is a half-section perspective view of the mixing pipe of the fan unit assembly of the second embodiment;

[0025] Figure 8 is a front view of the mixing pipe of the fan unit assembly of the second embodiment.

[0026] Reference Signs:

[0027] Fan unit assembly 10, mixing pipe 1, first gas inlet pipe 11, gas inlet 111, gas outlet 112, inlet section 12, contraction section 13, throat section 14, diffusion section 15, straight pipe section 16, elbow pipe section 17, second gas inlet joint 21, connecting element 22, fan cover plate 3, cover plate opening 31, volute assembly 4, mixed gas connection opening 41. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein the same or like reference numerals are used to represent the same or similar elements throughout the several views. The embodiments described below are exemplary and are intended to explain the present application, and are not intended to limit the present application.

[0029] In the description of the present application, it is to be understood that the terms "longitudinal", "transverse", "vertical", "horizontal", "inner", "outer", and the like, indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In the present application, unless specifically defined otherwise and limited, the terms "mounting", "connection", "linking", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The following will be described in detail Figures 1-8 The fan assembly 10 for the gas water heater according to the embodiment of the present application is described in detail.

[0032] Referring to Figure 1 As shown in the figure, the fan assembly 10 for the gas water heater according to the embodiment of the present application can include a mixing pipe 1 and a fan cover plate 3, the mixing pipe 1 and the fan cover plate 3 are connected, in a specific embodiment, the fan assembly 10 is used to connect the air inlet 111 and the gas inlet, and the mixing pipe 1 can mix air and gas, and the mixed gas is transmitted to the combustion chamber through the fan cover plate 3, so as to ensure the normal work of the gas water heater.

[0033] Specifically, as Figures 1-8 shown, the mixing pipe 1 can include a first gas inlet pipe 11, the first gas inlet pipe 11 has an air inlet 111 and an air outlet 112, and the first gas inlet pipe 11 is provided with a second gas inlet joint 21, the second gas inlet joint 21 is connected with the gas passage of the first gas inlet pipe 11, and the fan cover plate 3 is provided with a cover plate opening 31, the air outlet 112 is connected with the cover plate opening 31. In a specific embodiment, the first gas inlet pipe 11 is an air inlet pipe, the air inlet 111 is an air inlet 111, air enters the first gas inlet pipe 11 from the air inlet 111, the second gas inlet joint 21 is a gas inlet joint, gas enters the first gas inlet pipe 11 from the second gas inlet joint 21, so that the gas can be fully mixed with the air in the first gas inlet pipe 11, the air outlet 112 is a mixed gas outlet 112, and the mixed gas is discharged from the air outlet 112, completing the mixing of air and gas.

[0034] It should be noted that the terms "first", "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0035] Further, as Figure 1 ,Figure 5 As shown, the fan assembly 10 may also include: a volute assembly 4, the volute assembly 4 may include a volute shell and a fan, the volute shell may be connected to the fan cover 3, the cover opening 31 is the fan air inlet, and the volute shell may form a fan installation cavity with the fan cover 3 to accommodate the fan, and the fan is located in the fan installation cavity.

[0036] In a specific embodiment, when the fan is working, air can be driven from the air inlet 111 into the first gas inlet pipe 11, and the gas mixture mixed in the first gas inlet pipe 11 passes through the cover port 31 of the fan cover 3 to the inside of the fan. Under the high-speed rotation and stirring of the fan impeller, the air and gas in the gas mixture can be mixed more fully.

[0037] And, as Figure 1 、 Figure 5 As shown, the volute casing is further provided with a mixed gas connection port 41, which can be communicated with the combustion chamber, thereby ensuring that the gas mixture enters the combustion chamber after being mixed again by the fan.

[0038] According to the fan subassembly 10 for a gas water heater according to an embodiment of the present invention, the mixing pipe 1 connects the air inlet 111 and the gas inlet, and the air and the gas can be mixed in the first gas inlet pipe 11. Therefore, without the need for other components, the mixing of air and gas can be achieved only through the mixing pipe 1, thereby ensuring the simplicity of the structure of the fan subassembly 10, and in the first gas inlet pipe 11, the air and the gas can be fully mixed, thereby ensuring that the exhaust gas emission content of the gas water heater is low.

[0039] In the first embodiment, Figure 4 As shown, the first gas inlet pipe 11 is a Venturi pipe, and the first gas inlet pipe 11 may include: an inlet section 12, a contraction section 13, a throat section 14 and a diffusion section 15 axially connected in sequence, the end of the inlet section 12 away from the contraction section 13 is an air inlet 111, and the end of the diffusion section 15 away from the throat section 14 is an air outlet 112. In the direction extending from the air inlet 111 to the air outlet 112, the cross-sectional inner diameter of the inlet section 12 is the same, the cross-sectional inner diameter of the contraction section 13 gradually decreases, and the cross-sectional inner diameter of the diffusion section 15 gradually increases. The connecting port between the second gas inlet joint 21 and the first gas inlet pipe 11 is located on the pipe wall of the throat section 14, that is, the gas inlet is located on the throat section 14, and since the throat section 14 is located between the contraction section 13 and the diffusion section 15, it is possible for the air to be fully mixed with the gas.

[0040] The gas intake direction is cross-or even perpendicular to the air intake direction, which can further improve the mixing uniformity.

[0041] In a specific embodiment, when the fan starts to work, air enters into the inlet section 12 from the air inlet 111, at this time, the air flow rate is the same, and the flow state of the air is laminar flow. When the air enters into the converging section 13, the cross-sectional inner diameter of the converging section 13 gradually decreases, and the flow rate of the air gradually increases. When the air enters into the throat section 14, the flow rate of the air reaches the maximum, and the flow state of the air changes into turbulent flow. Under the action of the air entraining force, the fuel gas enters into the first gas inlet pipe 11 from the second gas inlet joint 21. At this time, due to the large flow rate of the air in the throat section 14, the fuel gas can be effectively prevented from diffusing to the inlet section 12, so that the fuel gas flows to the air outlet 112 together with the air, and due to the turbulent flow state of the air at this time, the air and the fuel gas can be mixed to form fuel gas mixture. When the fuel gas mixture enters into the diffuser section 15, the cross-sectional inner diameter of the diffuser section 15 gradually increases, and the flow rate of the fuel gas mixture gradually decreases, so that the fuel gas in the fuel gas mixture can be fully mixed with the air, thereby ensuring that the gas mixture pipe 1 can fully mix the air and the fuel gas, ensuring that the fuel gas can be fully combusted, and further ensuring that the harmful emissions of the fuel gas water heater are less.

[0042] In a second aspect embodiment, as shown in Figures 5-8 The first gas inlet pipe 11 can include a straight pipe section 16 and an elbow pipe section 17. The elbow pipe section 17 connects the straight pipe section 16 and the cover plate opening 31. The communication opening of the second gas inlet joint 21 with the first gas inlet pipe 11 is located on the straight pipe section 16.

[0043] In a specific embodiment, when the fan starts to work, air enters into the straight pipe section 16 from the air inlet 111, and fuel gas enters into the straight pipe section 16 from the second gas inlet joint 21 and converges with the air. However, at this time, the air and the fuel gas are in a laminar flow state in the straight pipe section 16, and the flow state of the air and the fuel gas is relatively stable and cannot be fully mixed. When the air and the fuel gas pass through the elbow pipe section 17, the air and the fuel gas collide with the pipe wall of the elbow pipe section 17 and the flow direction of the air and the fuel gas changes. At this time, the air and the fuel gas collide violently in the elbow pipe section 17, so that the air and the fuel gas are fully mixed, thereby ensuring that the gas mixture pipe 1 can fully mix the air and the fuel gas, and ensuring that the fuel gas can be fully combusted.

[0044] At the same time, the fuel gas inlet direction and the air inlet direction intersect or even are perpendicular, which can further improve the mixing uniformity.

[0045] Further, the bending angle of the elbow pipe section 17 is 60°-150°, that is, the bending angle of the elbow pipe section 17 is prevented from being too small, which causes the discharge amount of the fuel gas mixture to be small, and the bending angle of the elbow pipe section 17 is prevented from being too large, which causes the air and the fuel gas in the fuel gas mixture to be insufficiently mixed.

[0046] In specific embodiments, the bend angle of the bend pipe section 17 can be 70°, 90° or 140°, etc.

[0047] In some embodiments, the end of the second gas inlet joint 21 away from the first gas inlet pipe 11 is provided with a connecting element 22, which is adapted to be connected with the gas pipeline, so as to ensure that the gas can smoothly enter the first gas inlet pipe 11 from the second gas inlet joint 21.

[0048] In specific embodiments, the connecting element 22 can be a flange, a buckle or a latch, that is, the second gas inlet joint 21 can be connected with the gas pipeline through the flange, the buckle or the latch.

[0049] In other embodiments, as shown in Figures 1-4 , the second gas inlet joint 21 can also be an inlet joint with external threads, that is, the second gas inlet joint 21 can be connected with the gas pipeline through threads, so as to realize the communication of the second gas inlet joint 21 and the gas pipeline.

[0050] In some embodiments, as shown in Figures 1-4 , the gas mixing pipe 1 and the fan cover plate 3 can be integrally formed, which can improve the assembly efficiency of the fan assembly 10, and the gas mixing pipe 1 and the fan cover plate 3 can be sold together, which is conducive to reducing the cost of the fan assembly 10.

[0051] In other embodiments, as shown in Figures 5-8 , the gas mixing pipe 1 and the fan cover plate 3 can be connected through a flange, that is, a flange that can be matched is arranged at the connection between the gas mixing pipe 1 and the fan cover plate 3, and the connection between the gas mixing pipe 1 and the fan cover plate 3 is realized through the flange connection. The gas mixing pipe 1 and the fan cover plate 3 are connected through the flange, which can facilitate the maintenance of the gas mixing pipe 1 and the fan cover plate 3 in the later period.

[0052] According to another aspect of the embodiments of the present application, a gas water heater comprises the fan assembly 10 for the gas water heater.

[0053] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0054] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A fan assembly for a gas water heater, characterized in that: The application relates to a fan cover plate and a gas mixing pipe. The gas mixing pipe comprises a first gas inlet pipe with a gas inlet and a gas outlet, and a second gas inlet joint is arranged on the first gas inlet pipe and communicates with the gas channel of the first gas inlet pipe. The fan cover plate is provided with a cover plate opening, and the gas outlet communicates with the cover plate opening. The first gas inlet pipe comprises a straight pipe section and a bent pipe section, the bent pipe section connects the straight pipe section and the cover plate opening, the communication opening of the second gas inlet joint is located on the straight pipe section, and the bending angle of the bent pipe section is 60-150 degrees.

2. The fan and draft assembly for a gas water heater of claim 1, wherein, The first gas inlet pipe is a Venturi pipe and comprises an inlet section, a contraction section, a throat section and a diffusion section which are connected axially in sequence.

3. The fan and draft assembly for a gas water heater of claim 1, wherein, The end of the inlet section away from the contraction section is the gas inlet, the end of the diffusion section away from the throat section is the gas outlet, in the direction extending from the gas inlet to the gas outlet, the cross-section inner diameter of the inlet section is the same, the cross-section inner diameter of the contraction section is gradually reduced, and the cross-section inner diameter of the diffusion section is gradually increased.

4. The fan and draft assembly for a gas water heater of claim 1, wherein, The end of the second gas inlet joint away from the first gas inlet pipe is provided with a connecting element.

5. The fan and draft assembly for a gas water heater of claim 1, wherein, The second gas inlet joint is a gas inlet joint with external threads.

6. The fan and draft assembly for a gas water heater of claim 1, wherein, The gas mixing pipe and the fan cover plate are integrally formed.

7. A gas water heater, characterised by, The gas mixing pipe and the fan cover plate are connected through flanges. The first gas inlet pipe is an air inlet pipe, and the second gas inlet joint is a gas inlet joint. The application further relates to a fan assembly for a gas water heater.

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