Air inlet components, fans and gas water heaters

Abstract

The present invention discloses an air inlet assembly, a fan and a gas water heater, and relates to the technical field of fans, an air inlet assembly, comprising an air inlet plate, the air inlet plate comprising a horizontal end and a raised end arranged around the horizontal end, the air inlet plate being provided with a first through hole; a shell, the shell comprising a first end face located on the outside and a second end face opposite to the first end face, the first end face of the shell abutting against the raised end, the first end face and the second end face being both provided with openings, a receiving cavity being provided inside the shell, an expansion cavity being formed between the air inlet plate and the first end face; an adjustment plate, the adjustment plate being provided in the receiving cavity through an elastic element, the adjustment plate being provided with an air inlet, and the adjustment plate and the shell forming an air inlet channel. The air inlet area of ​​the present invention can be adjusted with the rotation speed of the fan, and the air inlet, the expansion cavity and the first through hole can form an expansion cavity muffler to achieve noise reduction.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to an air inlet assembly, a fan and a gas water heater. Background Art

[0002] At present, gas water heaters are generally equipped with a combustion air fan under the combustion chamber to increase the heat load of the burner. The specific structure of the gas water heater in the prior art can refer to the Chinese utility model patent "Side-mounted structure of household gas water heater fan" with patent number ZL9925252.8, and can also refer to the Chinese utility model patent "Burner of gas water heater" with patent number ZL02226785.9.

[0003] However, the air volume of the fan in the above-mentioned prior art is fixed and cannot be adjusted. It cannot be adjusted according to the actual changes of the gas and air to achieve the best mixing ratio. In some cases, the inherent air intake volume is easy to affect the combustion, and the existing fan has serious sound spillover and loud noise. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the air inlet of the fan cannot adjust the air intake volume and the fan noise is large, and to provide an air intake component, a fan and a gas water heater.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] An air inlet assembly, comprising:

[0007] An air inlet plate, wherein the air inlet plate is provided with a first through hole;

[0008] A shell, the shell comprising a first end face located on the outside and a second end face opposite to the first end face, the first end face of the shell abuts against the air inlet plate, the first end face and the second end face are both provided with openings, a receiving cavity is provided inside the shell, and an expansion cavity is formed between the air inlet plate and the first end face;

[0009] An adjustment plate, wherein the adjustment plate is arranged in the accommodating cavity through an elastic element, the adjustment plate is provided with an air inlet, the adjustment plate and the shell form an air inlet channel, and the adjustment plate can move relative to the first end face under the action of wind force to change the air inlet channel and thus adjust the air inlet area.

[0010] In this solution, when the fan is working, the fan impeller rotates, a negative pressure area is formed inside the fan, and the adjustment plate moves relative to the first end face due to the pressure difference on both sides, thereby changing the air inlet channel. The air inlet area can be adjusted by changing the air inlet channel. The more displacement, the more air inlet area is available for air intake, and the greater the air volume. The air inlet area can be changed with the fan speed. The higher the fan speed, the larger the air inlet area. The noise is generated by the interaction between the impeller and the air, and can escape through the path of the air inlet-expansion chamber-first through hole. The air inlet, the expansion chamber and the first through hole can form an expansion chamber silencer to achieve noise reduction.

[0011] Preferably, the air inlet plate assembly also includes a support shaft, a second through hole is provided in the middle of the adjustment plate, a support portion is provided at the opening of the second end surface, the support shaft passes through the opening of the first end surface and the second through hole, one end of the support shaft is connected to the air inlet plate, and the other end of the support shaft is connected to the support portion.

[0012] In this solution, by providing a support shaft, the adjustment plate can slide along the support shaft, and the support shaft has a limiting effect on the adjustment plate in the non-moving direction, so the adjustment plate is not easily offset.

[0013] Preferably, the elastic element comprises a first spring, the first spring is sleeved on the supporting shaft, one end of the first spring abuts against the middle position of the adjusting plate, and the other end of the first spring abuts against the supporting portion.

[0014] In this solution, the adjustment plate compresses the first spring when subjected to force, and can then move along the axial direction of the support shaft, thereby changing the air inlet channel and adjusting the air inlet area.

[0015] Preferably, the elastic element further includes a second spring, which is arranged around the inner wall of the accommodating cavity, one end of the second spring abuts against the edge of the adjustment plate, and the other end of the second spring abuts against the second end surface.

[0016] In this solution, the second spring is provided to improve the stability of the adjustment plate during movement, and the adjustment plate is less likely to deviate.

[0017] Preferably, the support shaft includes a first limiting portion and a second limiting portion, the first limiting portion is arranged at a position where the support shaft is located at an opening of the first end face, the second limiting portion is arranged at a position where the support shaft is close to the opening of the second end face, and the adjustment plate moves between the first limiting portion and the second limiting portion in an axial direction along the support shaft.

[0018] In this solution, by providing the first limiting portion and the second limiting portion, the displacement space of the adjustment plate is effectively limited, and the displacement of the adjustment plate will not exceed a preset range, which is more stable.

[0019] Preferably, the outer periphery of the adjustment plate abuts against the inner wall of the accommodating cavity.

[0020] In this solution, the air can only enter through the air inlet provided on the adjustment plate. When the adjustment plate moves, the adjustment of the air inlet area is more accurate.

[0021] Preferably, the adjustment plate includes an inner ring and an outer ring, the air inlet includes an inner ring air outlet and an outer ring air outlet, the inner ring is provided with an inner ring air outlet, and the outer ring is provided with an outer ring air outlet, and when the adjustment plate is in an initial state, the side of the inner ring close to the first end face abuts against the opening at the first end face.

[0022] In this solution, when the adjustment plate is in the initial state, the air flow enters from the inner ring air inlet. When the adjustment plate moves, a gap will be created between the inner ring and the first end face, so that the air flow can enter from both the inner ring air inlet and the outer ring air inlet at the same time. The larger the gap, the larger the air inlet area.

[0023] Preferably, the air inlet channel includes a first air inlet channel and a second air inlet channel, the inner ring air outlet and the first through hole form the first air inlet channel, and the outer ring air outlet and the first through hole form the second air inlet channel.

[0024] In this solution, in the initial state, the airflow can only enter from the first air inlet channel. When the adjustment plate moves, the airflow can also enter from the second air inlet channel, so the air inlet area can be adjusted.

[0025] Preferably, the adjustment plate is an umbrella structure, and the outer peripheral surface of the adjustment plate is inclined from the inner ring to the outer ring.

[0026] In this solution, an umbrella structure is adopted, and a large gap is formed between the outer ring and the outer shell to connect with the expansion cavity. When the noise airflow enters the expansion cavity from the outer ring air outlet, it is equivalent to increasing the space of the expansion cavity in disguise, which is beneficial to improving the noise reduction effect.

[0027] Preferably, there are a plurality of inner ring air outlets, which are spaced apart around the center of the adjustment plate, and / or there are a plurality of outer ring air outlets, which are spaced apart around the center of the adjustment plate.

[0028] In this solution, by setting up multiple inner ring air outlets and outer ring air outlets, the air intake is smoother and more uniform, and when some air outlets are blocked, the other air outlets can still take in air normally.

[0029] Preferably, the air inlet plate includes a horizontal end and a raised end arranged around the horizontal end.

[0030] In the present solution, a specific structure of the air inlet plate is provided, and an expansion cavity can be formed between the horizontal end and the protruding end and the first end surface of the shell.

[0031] Preferably, a plurality of the first through holes are provided, and the plurality of the first through holes are distributed at intervals on the protruding end.

[0032] In this solution, through the multiple first through holes, on the one hand, air intake can be effectively guaranteed, and on the other hand, it is conducive to the escape of noise and the reduction of noise.

[0033] A fan comprises the air inlet assembly as described above.

[0034] In this solution, the air inlet area of ​​the fan can be automatically adjusted according to the fan speed, and the noise of the fan can also be reduced.

[0035] A gas water heater comprises the fan as described above.

[0036] In this solution, the gas water heater has low noise and the air inlet area can be automatically adjusted.

[0037] The positive and progressive effect of the present invention is that when the fan is working, the fan impeller rotates, a negative pressure area is formed inside the fan, and the adjustment plate is affected by the pressure difference on both sides and moves relative to the first end face, thereby changing the air inlet channel. By changing the air inlet channel, the air inlet area can be adjusted. The more displacement, the more air inlet area can be provided for air inlet, and the greater the air volume. The air inlet area can be changed with the fan speed. The higher the fan speed, the larger the air inlet area. The noise is generated by the interaction between the impeller and the air, and can escape through the path of the air inlet-expansion chamber-first through hole. The air inlet, the expansion chamber and the first through hole can form an expansion chamber silencer to achieve noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of an air inlet assembly according to a preferred embodiment of the present invention;

[0039] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0040] Figure 3 A schematic diagram of the cross-sectional structure of an air inlet assembly according to a preferred embodiment of the present invention;

[0041] Figure 4 A schematic structural diagram of an adjustment plate according to a preferred embodiment of the present invention;

[0042] Figure 5The figure is a schematic structural diagram of a fan according to a preferred embodiment of the present invention.

[0043] Air inlet plate 100

[0044] Horizontal end 110

[0045] Raised end 120

[0046] First through hole 121

[0047] Expansion cavity 130

[0048] Housing 200

[0049] First end surface 210

[0050] Second end surface 220

[0051] Supporting part 221

[0052] Support shaft 300

[0053] The first limiting portion 310

[0054] The second limiting portion 320

[0055] Adjustment plate 400

[0056] Inner Ring 410

[0057] The second through hole 411

[0058] Inner ring air outlet 412

[0059] Outer Ring 420

[0060] Outer ring air outlet 421

[0061] First spring 510

[0062] Second spring 520 DETAILED DESCRIPTION

[0063] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0064] like Figure 1-Figure 4 As shown, this embodiment provides an air inlet assembly, which includes:

[0065] The air inlet plate 100 is provided with a first through hole 121;

[0066] The housing 200 includes a first end surface 210 located outside and a second end surface 220 opposite to the first end surface 210. The first end surface 210 of the housing 200 abuts against the air inlet plate 100. Both the first end surface 210 and the second end surface 220 are provided with openings. An accommodating cavity is provided inside the housing 200. An expansion cavity 130 is formed between the air inlet plate 100 and the first end surface 210.

[0067] The adjusting plate 400 is arranged in the accommodating cavity through an elastic element. The adjusting plate 400 is provided with an air inlet. The adjusting plate 400 and the shell 200 form an air inlet channel. The adjusting plate 400 can move relative to the first end face 210 under the action of wind to change the air inlet channel and thus adjust the air inlet area.

[0068] When the fan is working, the fan impeller rotates, and a negative pressure area is formed inside the fan. The adjustment plate 400 is affected by the pressure difference on both sides and moves relative to the first end surface 210, thereby changing the air inlet channel. The air inlet area can be adjusted by changing the air inlet channel. The more displacement, the more air inlet area can be provided for air intake, and the greater the air volume. The air inlet area can be changed with the fan speed. The higher the fan speed, the larger the air inlet area. The noise is generated by the interaction between the impeller and the air, and can escape through the path of the air inlet-expansion chamber 130-first through hole 121. The air inlet, the expansion chamber 130 and the first through hole 121 can form an expansion chamber 130 muffler. The speed of the airflow can be reduced through the expansion chamber 130 to achieve noise reduction.

[0069] Specifically, in this embodiment, Figure 1 and Figure 3 As shown, the air inlet plate 100 includes a horizontal end 110 and a protruding end 120 disposed around the horizontal end 110. A specific structure of the air inlet plate is provided, and an expansion cavity can be formed between the horizontal end 110 and the protruding end 120 and the first end surface 210 of the housing 200.

[0070] There are a plurality of first through holes 121, which are spaced apart at the protruding end 120. Through the plurality of first through holes 121, on the one hand, air intake can be effectively guaranteed, and on the other hand, noise can be easily escaped and reduced.

[0071] In other embodiments, the air inlet plate may also be configured as a spherical surface or an arc-shaped surface that can form an expansion cavity with the first end surface 210 .

[0072] Specifically, Figure 3 and Figure 4As shown, the adjustment plate 400 includes an inner ring 410 and an outer ring, and the air inlet includes an inner ring air inlet 412 and an outer ring air inlet 421. The inner ring 410 is provided with the inner ring air inlet 412, and the outer ring is provided with the outer ring air inlet 421. When the adjustment plate 400 is in the initial state, the side of the inner ring 410 close to the first end face 210 abuts against the opening at the first end face 210, wherein the initial state is the state in which the fan is in operation. When the adjustment plate 400 is in the initial state, the airflow enters from the inner ring air inlet 412. When the adjustment plate 400 moves, a gap is generated between the inner ring 410 and the first end face 210, and then the airflow can enter from the inner ring air inlet 412 and the outer ring air inlet 421 at the same time. The larger the gap, the larger the air inlet area.

[0073] In this embodiment, the air inlet channel includes a first air inlet channel and a second air inlet channel, the inner ring air outlet 412 and the first through hole 121 form a first air inlet channel A, and the outer ring air outlet 421 and the first through hole 121 form a second air inlet channel B. In the initial state, the airflow can only enter from the first air inlet channel A. When the adjustment plate 400 moves, the airflow can also enter from the second air inlet channel B, and the air inlet area can be adjusted. When the fan speed is faster, the pressure difference is greater, the adjustment plate 400 moves farther, and the gap between the adjustment plate 400 and the first end face 210 is larger, and the air inlet area will also increase accordingly. Among them, the noise airflow can also escape from different air inlet channels at different fan speeds, which is conducive to further improving the noise reduction effect.

[0074] In other embodiments, a middle ring may be provided between the inner ring 410 and the outer ring of the adjustment plate 400. The middle ring is provided with a middle ring air outlet. The middle ring air outlet and the first through hole 121 form a third air inlet channel, and the air inlet area can be more effectively adjusted.

[0075] In other embodiments, the adjustment plate 400 may be provided with a greater number of rings, and each ring may be provided with a corresponding air outlet.

[0076] In this embodiment, the adjustment plate 400 is an umbrella structure, and the outer peripheral surface of the adjustment plate 400 is inclined from the inner ring 410 to the outer ring. With the umbrella structure, a large gap is formed between the outer ring and the outer shell 200 to communicate with the expansion cavity 130. When the noise airflow enters the expansion cavity 130 from the outer ring air outlet 421, it is equivalent to increasing the space of the expansion cavity 130 in disguise, which is conducive to improving the noise reduction effect.

[0077] In this embodiment, there are multiple inner ring air outlets 412, and the multiple inner ring air outlets 412 are arranged at intervals around the center of the adjustment plate 400, and / or there are multiple outer ring air outlets 421, and the multiple outer ring air outlets 421 are arranged at intervals around the center of the adjustment plate 400. By providing multiple inner ring air outlets 412 and outer ring air outlets 421, the air intake is smoother and more uniform, and when some air outlets are blocked, other air outlets can still normally intake air.

[0078] like Figure 2 and Figure 3 As shown, the air inlet plate 100 assembly further includes a support shaft 300, a second through hole 411 is provided in the middle of the adjustment plate 400, a support portion 221 is provided at the opening of the second end surface 220, the support shaft 300 passes through the opening of the first end surface 210 and the second through hole 411, one end of the support shaft 300 is connected to the horizontal end 110, and the other end of the support shaft 300 is connected to the support portion 221. By providing the support shaft 300, the adjustment plate 400 can slide along the support shaft 300, and the support shaft 300 has a limiting effect on the adjustment plate 400 in the non-moving direction, and the adjustment plate 400 is not easy to deviate.

[0079] In this embodiment, the elastic element includes a first spring 510, which is sleeved on the support shaft 300, one end of the first spring 510 abuts against the middle position of the adjustment plate 400, and the other end of the first spring 510 abuts against the support portion 221. When the adjustment plate 400 is subjected to force, it compresses the first spring 510, and then can move along the axial direction of the support shaft 300, change the air inlet channel, and adjust the air inlet area.

[0080] In this embodiment, the elastic element further includes a second spring 520, which is arranged around the inner wall of the accommodating cavity, one end of the second spring 520 abuts against the edge of the adjustment plate 400, and the other end of the second spring 520 abuts against the second end surface 220. The second spring 520 is provided to improve the stability of the adjustment plate 400 during movement, and the adjustment plate 400 is not easily deflected.

[0081] In this embodiment, the support shaft 300 includes a first limiting portion 310 and a second limiting portion 320, the first limiting portion 310 is arranged at the position of the support shaft 300 at the opening of the first end surface 210, and the second limiting portion 320 is arranged at the position of the support shaft 300 close to the opening of the second end surface 220, and the adjustment plate 400 moves between the first limiting portion 310 and the second limiting portion 320 along the axial direction of the support shaft 300. By providing the first limiting portion 310 and the second limiting portion 320, the displacement space of the adjustment plate 400 is effectively limited, and the displacement of the adjustment plate 400 will not exceed the preset range, which is more stable.

[0082] In this embodiment, the outer periphery of the adjustment plate 400 abuts against the inner wall of the accommodating cavity. The air can only enter through the air inlet provided on the adjustment plate 400. When the adjustment plate 400 moves, the air inlet area can be adjusted more accurately.

[0083] In other embodiments, a gap may be provided between the outer periphery of the adjustment plate 400 and the inner wall of the accommodating cavity, and an air inlet channel may be formed through the gap and the first through hole 121. A greater number of air inlet channels is beneficial for adjusting the air inlet area.

[0084] like Figure 5 As shown, in this embodiment, a fan is also provided, which includes the above air inlet assembly. The air inlet area of ​​the fan can be automatically adjusted with the fan speed, and the noise of the fan can also be reduced.

[0085] In this embodiment, a gas water heater is also provided, which includes the above-mentioned fan. The gas water heater has low noise and the air inlet area can be automatically adjusted.

[0086] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. An air inlet assembly, characterized in that: It includes: An air inlet plate, wherein the air inlet plate is provided with a first through hole; A shell, the shell comprising a first end face located on the outside and a second end face opposite to the first end face, the first end face of the shell abuts against the air inlet plate, the first end face and the second end face are both provided with openings, a receiving cavity is provided inside the shell, and an expansion cavity is formed between the air inlet plate and the first end face; An adjustment plate, wherein the adjustment plate is arranged in the accommodating cavity through an elastic element, the adjustment plate is provided with an air inlet, the adjustment plate and the shell form an air inlet channel, the adjustment plate can move relative to the first end face under the action of wind force to change the air inlet channel and thus adjust the air inlet area, the adjustment plate comprises an inner ring and an outer ring, the air inlet comprises an inner ring air inlet and an outer ring air inlet, the inner ring is provided with an inner ring air inlet, and the outer ring is provided with an outer ring air inlet, when the adjustment plate is in an initial state, a side of the inner ring close to the first end face abuts against the opening at the first end face, the air inlet channel comprises a first air inlet channel and a second air inlet channel, the inner ring air inlet and the first through hole form the first air inlet channel, and the outer ring air inlet and the first through hole form the second air inlet channel.

2. The air inlet assembly according to claim 1, characterized in that: The air inlet assembly also includes a support shaft, a second through hole is provided in the middle of the adjustment plate, a support portion is provided at the opening of the second end surface, the support shaft passes through the opening of the first end surface and the second through hole, one end of the support shaft is connected to the air inlet plate, and the other end of the support shaft is connected to the support portion.

3. The air inlet assembly according to claim 2, characterized in that: The elastic element includes a first spring, the first spring is sleeved on the support shaft, one end of the first spring abuts against the middle position of the adjustment plate, and the other end of the first spring abuts against the support portion.

4. The air inlet assembly according to claim 3, characterized in that: The elastic element further includes a second spring, which is arranged around the inner wall of the accommodating cavity, one end of the second spring abuts against the edge of the adjustment plate, and the other end of the second spring abuts against the second end surface.

5. The air inlet assembly according to claim 3, characterized in that: The support shaft includes a first limiting portion and a second limiting portion, the first limiting portion is arranged at a position where the support shaft is located at an opening of the first end face, and the second limiting portion is arranged at a position where the support shaft is close to the opening of the second end face, and the adjustment plate moves between the first limiting portion and the second limiting portion in an axial direction along the support shaft.

6. The air inlet assembly according to claim 1, characterized in that: The outer periphery of the adjustment plate abuts against the inner wall of the accommodating chamber.

7. The air inlet assembly according to claim 1, characterized in that: The adjustment plate is an umbrella structure, and the outer peripheral surface of the adjustment plate is inclined from the inner ring to the outer ring.

8. The air inlet assembly according to claim 1, characterized in that: There are multiple inner ring air outlets, and the multiple inner ring air outlets are arranged at intervals around the center of the adjustment plate, and / or there are multiple outer ring air outlets, and the multiple outer ring air outlets are arranged at intervals around the center of the adjustment plate.

9. The air inlet assembly according to any one of claims 1 to 8, characterized in that: The air inlet plate includes a horizontal end and a raised end arranged around the horizontal end.

10. The air inlet assembly according to claim 9, characterized in that: A plurality of the first through holes are provided, and the plurality of the first through holes are distributed at intervals on the protruding end.

11. A fan, characterized in that: It comprises an air inlet assembly as described in any one of claims 1-10.

12. A gas water heater, characterized in that: It comprises the fan as claimed in claim 11.

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