Noise reduction structure of gas water heater

Abstract

The utility model discloses a noise reduction structure of a gas water heater, which relates to the technical field of noise reduction of gas water heaters and comprises a smoke exhaust pipeline and a gas inlet pipeline, a gap is reserved between the gas inlet pipeline and the smoke exhaust pipeline, the gas inlet pipeline is sleeved on the outer side of the smoke exhaust pipeline, a speed reduction cavity is arranged at the tail end of the gas inlet end of the gas inlet pipeline, and a splitter plate is arranged on the inner wall of the speed reduction cavity. A rectifying plate is arranged on the side, close to the splitter plate, of the air inlet pipeline, the rectifying plate and the splitter plate are both made of hard sound-absorbing cotton, the flowing speed of airflow is slowed down in the mode that a speed reduction cavity is formed in the pipeline, so that squeal generated by sudden acceleration of the airflow is avoided, the airflow is split, and the noise is reduced. The air flow is guided to generate the same flowing direction, the materials of the rectifying plate and the splitter plate can quickly absorb sound generated in the airflow moving process, the airflow with the same flowing direction is conveyed to the output direction of the air inlet pipeline, and the noise generated in the airflow moving process can be eliminated without external equipment in the whole process.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction of gas water heaters, and particularly relates to a noise reduction structure of a gas water heater. Background Art

[0002] As a relatively common gas water heater at present, the balanced gas water heater sucks oxygen from the outside and discharges the waste gas to the outside through an exhaust device, which is relatively safe. Usually, the inner and outer sleeves of the smoke exhaust pipe and the air inlet pipe extend outward to achieve the air inlet purpose.

[0003] However, in the actual use process, during the air inlet process, the gas will quickly move between the smoke exhaust pipe and the air inlet pipe. During the movement, gas whistling will occur, and the disordered gas hitting the pipeline will also cause noise. Covering the pipeline with a large amount of sound insulation cotton and other items can achieve the purpose of noise reduction, but at the same time, it will cause problems such as an increase in the diameter of the pipeline, an increase in the wall opening, and an increase in the pipeline temperature. If not handled, it will cause the water heater to be accompanied by noise for a long time during use, affecting the use effect. Content of the Utility Model

[0004] In order to make up for the deficiencies of the existing technology, the purpose of the utility model is to solve the problems existing in the prior art: during the air inlet process of the air inlet pipe, gas turbulence occurs, resulting in whistling, and the disordered gas will hit the pipeline to generate vibration, and the vibration will generate noise, and the noise persists during the process, affecting the use effect.

[0005] In order to solve the problems of the existing technology, the technical solution of the utility model is as follows: it includes a smoke exhaust pipe and an air inlet pipe that has a gap with the smoke exhaust pipe and is sleeved outside the smoke exhaust pipe. The end of the air inlet end of the air inlet pipe is provided with a deceleration chamber, and the inner wall of the deceleration chamber is provided with a flow dividing plate. A rectifying plate is arranged on one side of the air inlet pipe close to the flow dividing plate. Both the rectifying plate and the flow dividing plate are made of hard sound-absorbing cotton.

[0006] Further, an air distribution device is arranged at the air inlet end of the air inlet pipe. The air distribution device is directly communicated with the deceleration chamber. The air distribution device can ensure that the air flow enters the air inlet pipe evenly during the air inlet process, so as to reduce the possibility of gas turbulence after entering the air inlet pipe. At the same time, the gas entering the air inlet pipe will directly enter the deceleration chamber after moving a short distance.

[0007] Further, the deceleration chamber is overall spindle-shaped, and the inner diameter of the deceleration chamber gradually decreases and gradually becomes the same as the inner diameter of the air inlet pipe. The inner diameter of the deceleration chamber on the side close to the input end of the air inlet pipe is larger than that on the other side. The gas activity space for the air inlet pipe to enter the deceleration chamber increases, thereby slowing down the flow speed, and gradually recovering the moving speed again during the movement.

[0008] Further, the flow splitter is a plate-like structure with a cross-section in the shape of a water droplet, where the end with a larger diameter is close to the intake end of the intake pipeline, and several flow splitters are inclined and arranged in a circular array along the inner wall of the intake pipeline. When the gas contacts the flow splitter, it can be split to both sides under the influence of the shape of the flow splitter and generate a moving direction, greatly reducing the turbulence phenomenon in the air flow, and the whistling already generated by the gas can be quickly absorbed by the flow splitter made of sound-absorbing cotton, reducing the noise.

[0009] Further, the large-diameter end of the flow splitter extends to the side of the intake pipeline close to the intake end, ensuring that the air flow can contact the flow splitter immediately and generate a unified moving direction.

[0010] Further, the flow straightener includes an inclined end and a parallel end, and the inclined end of the flow straightener is located inside the deceleration chamber, and the parallel end extends into the intake pipeline.

[0011] Further, there are several flow straighteners arranged in a circular array along the inner wall of the intake pipeline, and the flow straighteners are arranged alternately with the flow splitters. The parallel ends of each flow straightener are arranged parallel to each other. The flow straightener can redirect the air flow split by the flow splitter and having the same moving direction into the parallel end again, changing the rotational movement of the air flow to a parallel movement, and increasing the contact area between the air flow and the sound-absorbing cotton material, improving the noise reduction effect.

[0012] Further, the inclined end of the flow straightener is aligned with the central position between the ends of every two flow splitters. The flow straightener can split each air flow generated by the flow splitter, increasing the contact area with the air flow and guiding the possibly existing turbulent air flow again.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] The present utility model slows down the flow velocity of the air flow by increasing the diameter by setting a deceleration chamber in the pipeline, thereby avoiding the whistling generated by the sudden acceleration of the air flow. And during the process of entering the deceleration chamber, the air flow will contact the flow splitter for splitting and guide the air flow to generate the same flow direction. Subsequently, it contacts the flow straightener. The materials of the flow straightener and the flow splitter can quickly absorb the sound generated during the movement of the air flow. Then the flow straightener splits the air flow again and integrates the flow direction, and conveys the air flow with the same flow direction to the output direction of the intake pipeline. During the whole process, the whistling generated by the sudden acceleration of the air flow can be eliminated without external equipment, and guiding the air flow to generate the same direction can reduce the possibility of generating noise due to the turbulent impact on the pipeline. The flow straightener and the flow splitter made of hard sound-absorbing cotton can also absorb the noise generated during the movement of the air flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 This is a schematic cross-sectional view of the overall structure of the present utility model.

[0017] Figure 3 This is a schematic cross-sectional view of the intake pipeline of the present utility model.

[0018] Figure 4 This is a schematic view of the internal structure of the deceleration chamber of the present utility model.

[0019] Reference numerals: 1, exhaust gas pipeline; 2, intake pipeline; 3, deceleration chamber; 4, flow splitting plate; 5, rectifying plate. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0021] As Figures 1-4 shown, a noise reduction structure of a gas water heater includes an exhaust gas pipeline 1 and an intake pipeline 2 that has a gap with the exhaust gas pipeline 1 and is sleeved outside the exhaust gas pipeline 1;

[0022] A deceleration chamber 3 is provided at the end of the intake end of the intake pipeline 2. An air distribution device is provided at the intake end of the intake pipeline 2, which is formed by two hole pipes sleeved with each other and having a cavity therebetween. The end far from the intake pipeline 2 is closed, and the other end is directly communicated with the deceleration chamber 3. The air distribution device can ensure that the air flow enters evenly along the perforations on the surface during the intake process of the intake pipeline 2, so as to reduce the possibility of turbulence occurring after the gas enters the intake pipeline 2. At the same time, the gas entering the intake pipeline 2 will directly enter the deceleration chamber 3 after moving a short distance. The deceleration chamber 3 is generally spindle-shaped, and the inner diameter of the deceleration chamber 3 gradually decreases and gradually becomes the same as the inner diameter of the intake pipeline 2. The inner diameter of the deceleration chamber 3 on one side close to the input end of the intake pipeline 2 is larger than that on the other side. The gas activity space for the gas entering the deceleration chamber 3 from the intake pipeline 2 increases, thereby slowing down the flow speed, and gradually restoring the moving speed again during the movement process;

[0023] A flow splitting plate 4 is provided on the inner wall of the deceleration chamber 3. The flow splitting plate 4 is a plate-shaped structure with a cross-section in the shape of a water droplet. The end with a larger diameter is close to the intake end of the intake pipeline 2, and a number of the flow splitting plates 4 are obliquely arranged and annularly arrayed along the inner wall of the intake pipeline 2. When the gas contacts the flow splitting plate 4, it can be affected by the shape of the flow splitting plate 4 and be split to both sides and generate a moving direction, greatly reducing the turbulence phenomenon in the air flow. And the screeching sound already generated by the gas can be quickly absorbed by the flow splitting plate 4 made of sound-absorbing cotton, reducing noise. The large-diameter end of the flow splitting plate 4 extends to the side of the intake pipeline 2 close to the intake end, ensuring that the air flow can contact the flow splitting plate 4 for the first time and generate a unified moving direction;

[0024] On one side of the intake air pipeline 2 close to the flow dividing plate 4, a rectifying plate 5 is provided. The rectifying plate 5 includes an inclined end and a parallel end, and the inclined end of the rectifying plate 5 is located inside the deceleration cavity 3, and the parallel end extends into the intake air pipeline 2. Both the rectifying plate 5 and the flow dividing plate 4 are made of rigid sound-absorbing cotton. There are several rectifying plates 5 which are arranged in a circular array along the inner wall of the intake air pipeline 2, and the rectifying plates 5 and the flow dividing plates 4 are arranged alternately. The parallel ends of each rectifying plate 5 are arranged parallel to each other. The rectifying plate 5 can redirect the air flow that is divided by the flow dividing plate 4 and has the same moving direction back into the parallel end, changing the rotational movement of the air flow to parallel movement, and increasing the contact area between the air flow and the sound-absorbing cotton material, thereby improving the noise reduction effect.

[0025] Principle of operation description: First, the air flow enters the intake air pipeline 2. The air flow entering the intake air pipeline 2 first contacts the flow dividing plate 4 and simultaneously enters the deceleration cavity 3. The air flow contacting the flow dividing plate 4 is quickly divided and guided by the flow dividing plate 4 to flow obliquely. When entering the deceleration cavity 3, the flow rate of the air flow slows down. Subsequently, it contacts the rectifying plate 5 and is divided again and guided to flow in the reverse direction by the rectifying plate 5. During the process of contacting the flow dividing plate 4 and the rectifying plate 5, the noise generated by the air flow and carried by the air flow is absorbed by the sound-absorbing cotton material of the flow dividing plate 4 and the rectifying plate 5. And when the air flow passes through the inclined end of the rectifying plate 5, it is divided again, and then enters the parallel end part. During the movement of the air flow in the parallel part, it has the same flow direction and continues to move along the intake air pipeline 2. At this time, the air flow direction inside is the same and there is no turbulent flow, and the air flow rate is stable and no whistling will occur.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure for a gas water heater, comprising an exhaust gas pipeline (1) and an intake air pipeline (2) which has a gap with the exhaust gas pipeline (1) and is sleeved outside the exhaust gas pipeline (1), characterized in that: A deceleration chamber (3) is provided at the end of the intake end of the intake pipeline (2). A flow splitting plate (4) is provided on the inner wall of the deceleration chamber (3). A rectifying plate (5) is provided on one side of the intake pipeline (2) close to the flow splitting plate (4). Both the rectifying plate (5) and the flow splitting plate (4) are made of rigid sound-absorbing cotton.

2. The noise reduction structure of a gas water heater according to claim 1, characterized in that: An air distribution device is provided at the intake end of the intake pipeline (2), and the air distribution device is directly communicated with the deceleration chamber (3).

3. The noise reduction structure of a gas water heater according to claim 1, characterized in that: The deceleration chamber (3) is generally spindle-shaped, and the inner diameter of the deceleration chamber (3) gradually decreases and gradually becomes the same as the inner diameter of the intake pipeline (2), wherein the inner diameter of the deceleration chamber (3) on one side close to the input end of the intake pipeline (2) is larger than that on the other side.

4. The noise reduction structure of a gas water heater according to claim 3, characterized in that: The flow splitting plate (4) is a plate-shaped structure with a cross-section in the shape of a water droplet, wherein the end with a larger diameter is close to the intake end of the intake pipeline (2), and a number of flow splitting plates (4) are obliquely arranged and are annularly arrayed along the inner wall of the intake pipeline (2).

5. The noise reduction structure of a gas water heater according to claim 4, characterized in that: The large-diameter end of the flow splitting plate (4) extends to one side of the intake pipeline (2) close to the intake end.

6. The noise reduction structure of a gas water heater according to claim 1, wherein: The rectifying plate (5) includes an inclined end and a parallel end, and the inclined end of the rectifying plate (5) is located inside the deceleration chamber (3), and the parallel end extends into the intake pipeline (2).

7. A noise reduction structure for a gas water heater according to any one of claims 4-6, characterized in that: A number of rectifying plates (5) are annularly arranged along the inner wall of the intake pipeline (2), and the rectifying plates (5) and the flow splitting plates (4) are arranged in a staggered manner, and the parallel ends of each rectifying plate (5) are arranged parallel to each other.

8. The noise reduction structure of a gas water heater according to claim 7, characterized in that: The inclined end of the rectifying plate (5) is aligned with the central position between the ends of every two flow splitting plates (4).

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