Fan and gas water heater

Abstract

The present invention discloses a fan and a gas water heater, and relates to the technical field of fans. A fan comprises: an air inlet plate, the air inlet plate is arranged on the end face of the air inlet side of the fan, the air inlet plate is provided with an air inlet, and a convex part convex along the air inlet direction is arranged around the air inlet; a wind shield plate, the wind shield plate is arranged on the side of the air inlet provided with the convex part, and the positive projection of the convex part is in the wind shield plate; an elastic element, the elastic element is arranged between the wind shield plate and the air inlet, and an adjustment part is arranged on the periphery of the elastic element, the elastic element rotates with the fan main shaft, and the adjustment part is close to or abuts against the convex part; the position of the convex part relative to the adjustment part is set to: the air inlet gap between the adjustment part and the convex part increases with the increase of the rotation speed of the fan main shaft. The air inlet area of ​​the present invention can be automatically adjusted with the rotation speed of the fan main shaft, and the greater the rotation speed of the fan main shaft, the greater the air inlet volume.

Description

Technical Field

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

[0002] When a gas water heater is working, it has high requirements for the air-gas ratio. When the air intake is greater than the combustion load, the flame is easily blown out. When the air intake is less than the combustion load, CO is easily produced due to incomplete combustion.

[0003] The gas water heater includes a fan for providing ventilation. The existing fan air inlet cannot be adjusted and is difficult to match with the extreme combustion load, resulting in incomplete combustion and low combustion efficiency when the external air pressure fluctuates. When burning under relatively low gas pressure, if the fan still maintains a normal air supply volume, problems such as flameout and the actual combustion temperature failing to reach the target temperature are prone to occur.

[0004] The air intake of existing fans is fixed and determined by the diameter of the air inlet plate. It cannot be adjusted, or the air intake plate needs to be manually adjusted to adjust the air intake of the fan. When the fan speed changes, the open area of ​​the fan's air inlet cannot be changed according to the air intake demand, affecting the user experience. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the air inlet of the fan in the prior art cannot be automatically adjusted, and to provide a fan and a gas water heater.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A fan, comprising:

[0008] An air inlet plate, the air inlet plate being arranged on the end surface of the air inlet side of the fan, the air inlet plate being provided with an air inlet, and a convex portion convex along the air inlet direction being arranged around the air inlet;

[0009] A windshield, the windshield being arranged on a side of the air inlet where the raised portion is arranged, and the orthographic projection of the raised portion is located in the windshield;

[0010] An elastic element, the elastic element is arranged between the wind shield and the air inlet, an adjusting portion is arranged on the outer periphery of the elastic element, the elastic element rotates together with the fan main shaft, and the elastic element is arranged so that: when the fan main shaft rotates, the elastic element can be deformed along the radial direction of the fan main shaft, and the adjusting portion is close to or abuts against the protrusion;

[0011] The position of the protrusion relative to the adjusting portion is set such that an air inlet gap between the adjusting portion and the protrusion increases as the rotation speed of the fan main shaft increases.

[0012] In this solution, when the fan is working, the fan main shaft rotates, and the elastic element rotates with the fan main shaft. The size of the elastic element along the radial direction of the fan main shaft is positively correlated with the rotation speed of the fan main shaft. When the fan main shaft does not rotate, the air inlet gap between the adjustment part and the protrusion is the smallest. As the rotation speed of the fan main shaft increases, the air inlet gap between the adjustment part and the protrusion also increases, thereby achieving that the air inlet area can be automatically adjusted with the rotation speed of the fan main shaft. The greater the speed of the fan main shaft, the greater the air inlet volume. Compared with the situation where the air outlet cannot be adjusted, the present invention can reduce noise when the fan speed is high. In addition, the air inlet area adjustment of the present invention does not require an additional transmission mechanism, and the structure is simple and reliable, and does not increase energy consumption.

[0013] Preferably, the wind shield is provided with a through hole, and the fan main shaft passes through the through hole and is fixedly connected to the elastic element.

[0014] In this solution, the fan main shaft is directly connected to the elastic element, and the elastic element is more stable as the fan main shaft rotates.

[0015] Preferably, the elastic element is annular, and includes a plurality of elastic units, wherein the plurality of elastic units are arranged around the fan main shaft, and the regions where the plurality of elastic units are close to the fan main shaft are connected to each other, and in the regions where the plurality of elastic units are far away from the fan main shaft, gaps are provided between adjacent elastic units.

[0016] In this solution, gaps are provided between adjacent elastic units. When the rotation speed of the fan main shaft increases and the elastic units are deformed, the gaps can provide reserved space for the deformation of the elastic units.

[0017] Preferably, a hollow portion is provided in the middle of the elastic unit.

[0018] In this solution, by providing the hollow portion, the elastic unit can be more easily deformed, and the elastic unit can sensitively sense the change in rotation speed, which is beneficial to controlling the air inlet gap between the adjustment portion and the raised portion.

[0019] Preferably, the protrusion is located on the inner side of the adjusting portion.

[0020] In this solution, the air inlet gap between the raised portion and the adjusting portion is easier to adjust.

[0021] Preferably, a surface of the adjusting portion close to the protruding portion gradually moves away from the adjusting portion from outside to inside.

[0022] In this solution, when the fan main shaft speed increases, the adjustment part moves outward along the radial direction of the main shaft, and thus the air inlet gap formed by the surface of the adjustment part close to the protrusion and the protrusion can increase with the increase of the fan main shaft speed.

[0023] Preferably, the thickness of the middle region of the elastic element is smaller than the thickness of the adjusting portion.

[0024] In this solution, the elastic unit can be made to deform more easily, and the elastic unit can sensitively sense the change in rotation speed, which is beneficial to controlling the air inlet gap between the adjusting portion and the protruding portion.

[0025] Preferably, a surface of the adjusting portion on a side close to the windshield is in contact with the windshield.

[0026] In this solution, the air inlet plate can provide support for the adjustment part.

[0027] Preferably, a limiting portion is arranged around the outer circumference of the wind shield plate, and the limiting portion is used to limit the elastic element.

[0028] In this solution, by adding a limiting portion, the deformation degree of the elastic element during the rotation of the fan main shaft can be limited, and the elastic element will not deform indefinitely. When contacting the limiting portion, the deformation of the elastic element will stop.

[0029] Preferably, a surface of the elastic element close to the limiting portion is a plane corresponding to the limiting portion.

[0030] In this solution, the contact area between the elastic element and the limiting portion is larger, and when the limiting portion limits the elastic element, it is not easy to cause deformation of the elastic element.

[0031] Preferably, the elastic element is an elastic membrane.

[0032] In this solution, the elastic membrane is highly sensitive and more easily deformed, which is beneficial for controlling the air inlet gap between the regulating portion and the raised portion.

[0033] A gas water heater, characterized in that it comprises the fan as described above.

[0034] In this solution, the fan can automatically adjust the area of ​​the air inlet according to the rotation speed, thereby intelligently adjusting the gas-air ratio, and the combustion process of the gas water heater is more stable and reliable.

[0035] The positive and progressive effect of the present invention is that: in the present invention, when the fan is working, the fan main shaft rotates, and the elastic element rotates together with the fan main shaft. The size of the elastic element along the radial direction of the fan main shaft is positively correlated with the rotation speed of the fan main shaft. When the fan main shaft does not rotate, the air inlet gap between the adjustment part and the protrusion is the smallest. As the rotation speed of the fan main shaft increases, the air inlet gap between the adjustment part and the protrusion also increases, thereby achieving that the air inlet area can be automatically adjusted with the rotation speed of the fan main shaft. The greater the speed of the fan main shaft, the greater the air inlet volume. Compared with the situation where the air outlet cannot be adjusted, the present invention can reduce noise when the fan speed is high. In addition, the air inlet area adjustment of the present invention does not require an additional transmission mechanism, and the structure is simple and reliable, and does not increase energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic cross-sectional structure diagram of a fan according to Embodiment 1 of the present invention;

[0037] Figure 2 This is a schematic diagram of the partial structure of the fan according to Embodiment 1 of the present invention;

[0038] Figure 3 for Figure 2 Schematic diagram of the internal structure;

[0039] Figure 4 This is a schematic structural diagram of an elastic element and a windshield plate according to Embodiment 1 of the present invention;

[0040] Figure 5 Schematic diagram of the positional relationship between the protruding portion and the adjusting portion in Example 2 of the present invention;

[0041] Figure 6 Schematic diagram of the positional relationship between the protruding portion and the adjusting portion in Example 3 of the present invention.

[0042] Air inlet plate 100

[0043] Air Inlet 110

[0044] Raised portion 120

[0045] Wind deflector 200

[0046] Limiting portion 210

[0047] Through hole 220

[0048] Elastic element 300

[0049] Adjustment unit 310

[0050] Elastic unit 320

[0051] Hollow part 3201

[0052] Fan spindle 400 DETAILED DESCRIPTION

[0053] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0054] Example 1

[0055] like Figure 1-Figure 4 As shown, in this embodiment, a fan is provided, which includes:

[0056] The air inlet plate 100 is arranged on the end surface of the air inlet side of the fan, and the air inlet plate 100 is provided with an air inlet 110. A protrusion 120 protruding along the air inlet direction is arranged around the air inlet 110.

[0057] The wind shield 200 is disposed on one side of the air inlet 110 where the protrusion 120 is disposed, and the orthographic projection of the protrusion 120 is located in the wind shield 200 .

[0058] The elastic element 300 is arranged between the wind shield 200 and the air inlet 110. An adjustment portion 310 is arranged on the periphery of the elastic element 300. The elastic element 300 rotates together with the fan main shaft 400. The elastic element 300 is arranged such that when the fan main shaft 400 rotates, the elastic element 300 can be deformed along the radial direction A of the fan main shaft 400, and the adjustment portion 310 is close to the protrusion 120.

[0059] In other embodiments, the adjusting portion 310 may also abut against the protruding portion 120 .

[0060] The position of the protrusion 120 relative to the adjustment portion 310 is set such that the air inlet gap between the adjustment portion 310 and the protrusion 120 increases as the rotation speed of the fan main shaft 400 increases.

[0061] When the fan is working, the fan main shaft 400 rotates, and the elastic element 300 rotates with the fan main shaft 400. The size of the elastic element 300 along the radial direction of the fan main shaft 400 is positively correlated with the rotation speed of the fan main shaft 400. When the fan main shaft 400 does not rotate, the air inlet gap between the adjustment part 310 and the protrusion 120 is the smallest. As the rotation speed of the fan main shaft 400 increases, the air inlet gap between the adjustment part 310 and the protrusion 120 also increases, thereby achieving that the air inlet area can be automatically adjusted with the rotation speed of the fan main shaft 400. The greater the rotation speed of the fan main shaft 400, the greater the air inlet volume. Compared with the situation where the air outlet cannot be adjusted, the present invention can reduce noise when the fan speed is high. In addition, the air inlet area adjustment of the present invention does not require an additional transmission mechanism, the structure is simple and reliable, and no additional energy consumption is increased.

[0062] In this embodiment, if Figure 1 and Figure 3As shown, the wind shield 200 is provided with a through hole 220, and the fan main shaft 400 passes through the through hole 220 and is fixedly connected to the elastic element 300. The fan main shaft 400 is directly connected to the elastic element 300, and the elastic element 300 is more stable with the rotation of the fan main shaft 400. Specifically, the wind shield 200 is fixedly connected to the fan main shaft 400, and the wind shield 200 rotates with the fan main shaft 400. In other embodiments, the wind shield 200 and the fan main shaft 400 can also be connected through a bearing, and the wind shield 200 does not rotate with the fan main shaft 400.

[0063] In other embodiments, the wind shield 200 may not be provided with the through hole 220. The wind shield 200 is directly connected to the fan main shaft 400. The fan main shaft 400 drives the wind shield 200 to rotate. The middle part of the elastic element 300 is fixedly connected to the wind shield 200, and then the elastic element 300 can rotate synchronously with the wind shield 200, that is, the elastic element 300 can rotate synchronously with the fan main shaft 400.

[0064] In this embodiment, if Figure 4 As shown, the elastic element 300 is annular, and the elastic element 300 includes a plurality of elastic units 320, which are arranged around the fan main shaft 400, and the regions of the plurality of elastic units 320 close to the fan main shaft 400 are connected to each other, and in the regions of the plurality of elastic units 320 far from the fan main shaft 400, gaps are arranged between adjacent elastic units 320. Gaps are arranged between adjacent elastic units 320, and when the rotation speed of the fan main shaft 400 increases and the elastic units 320 are deformed, the gaps can provide reserved space for the deformation of the elastic units 320.

[0065] In this embodiment, a hollow portion 3201 is provided in the middle of the elastic unit 320. By providing the hollow portion 3201, the elastic unit 320 can be more easily deformed, and the elastic unit 320 can be sensitive to the change of the rotation speed, which is beneficial to control the air inlet gap between the adjustment part 310 and the protrusion 120.

[0066] In other embodiments, the elastic element 300 may be a whole.

[0067] like Figure 3 As shown, in this embodiment, the protrusion 120 is located inside the adjusting portion 310. The air inlet gap between the protrusion 120 and the adjusting portion 310 is easier to adjust, and when the elastic element 300 is deformed along the main axis radial direction A, the air inlet gap changes more rapidly.

[0068] In this embodiment, the surface of the adjusting portion 310 close to the protrusion 120 gradually moves away from the adjusting portion 310 from the outside to the inside. Specifically, this surface is an arc-shaped structure. When the speed of the fan main shaft 400 increases, the adjusting portion 310 moves outward along the radial direction of the main shaft, and then the air inlet gap formed by the surface of the adjusting portion 310 close to the protrusion 120 and the protrusion 120 can increase with the increase of the speed of the fan main shaft 400.

[0069] In other embodiments, the adjustment portion 310 may also be a stepped structure that gradually moves away from the adjustment portion 310 from the outside to the inside.

[0070] like Figure 3 As shown, the thickness of the middle area of ​​the elastic element 300 is less than the thickness of the adjusting portion 310. This can make the elastic unit 320 more easily deformable, and the elastic unit 320 can sensitively sense the change in rotation speed, which is beneficial to control the air intake gap between the adjusting portion 310 and the protrusion 120.

[0071] In other embodiments, the thickness of the middle region of the elastic element 300 may be the same as or greater than the thickness of the adjusting portion 310 , and the middle region of the elastic element 300 may be made of a material that is easily deformed, such as natural rubber.

[0072] In this embodiment, the surface of the adjusting portion 310 on the side close to the wind shield 200 is in contact with the wind shield 200. The air inlet plate 100 can provide support for the adjusting portion 310.

[0073] In other embodiments, the surface of the adjusting portion 310 on the side close to the wind shield 200 may be partially in contact with the wind shield 200 .

[0074] In this embodiment, if Figure 3 As shown, a limiting portion 210 is provided around the outer periphery of the wind shield 200, and the limiting portion 210 is used to limit the elastic element 300. By adding the limiting portion 210, the deformation degree of the elastic element 300 during the rotation of the fan main shaft 400 can be limited, and the elastic element 300 will not deform indefinitely. When the elastic element 300 contacts the limiting portion 210, the deformation of the elastic element 300 will stop. The surface of the elastic element 300 close to the limiting portion 210 is a plane corresponding to the limiting portion 210.

[0075] In other embodiments, the limiting portion 210 may not be provided, and the relationship between the deformation of the elastic element 300 and the fan main shaft 400 may be tested in advance to ensure that the maximum deformation of the elastic element 300 does not exceed a preset range.

[0076] In this embodiment, the contact area between the elastic element 300 and the limiting portion 210 is larger, and when the limiting portion 210 limits the elastic element 300 , it is not easy to cause deformation of the elastic element 300 .

[0077] In this embodiment, the elastic element 300 is an elastic membrane, which is highly sensitive and more easily deformed, and is beneficial for controlling the air intake gap between the regulating portion 310 and the protruding portion 120 .

[0078] In other embodiments, the elastic element 300 may also be a rubber ring of the above shape.

[0079] A gas water heater, characterized in that it comprises the above-mentioned fan.

[0080] In this solution, the fan can automatically adjust the area of ​​the air inlet 110 according to the rotation speed, so as to intelligently adjust the gas-air ratio, and the combustion process of the gas water heater is more stable and reliable.

[0081] Example 2

[0082] The structure of this embodiment is basically the same as that of embodiment 1, except that:

[0083] like Figure 5 As shown, in this embodiment, the end of the adjusting portion 310 is located on the central axis of the protruding portion 120. When the adjusting portion 310 moves along the radial direction A of the fan main shaft, the gap between the adjusting portion 310 and the protruding portion 120 remains unchanged at first and then increases.

[0084] Example 3

[0085] The structure of this embodiment is basically the same as that of embodiment 1, except that:

[0086] like Figure 6 As shown, in this embodiment, the protrusion 120 is located outside the adjustment portion 310. When the adjustment portion 310 moves along the radial direction A of the fan main shaft, the gap between the adjustment portion 310 and the protrusion 120 remains unchanged at first and then increases.

[0087] 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. A fan, characterized in that: It includes: An air inlet plate, the air inlet plate being arranged on the end surface of the air inlet side of the fan, the air inlet plate being provided with an air inlet, and a convex portion convex along the air inlet direction being arranged around the air inlet; A windshield, the windshield being arranged on a side of the air inlet where the raised portion is arranged, and the orthographic projection of the raised portion is located in the windshield; An elastic element, the elastic element is arranged between the wind shield and the air inlet, an adjusting portion is arranged on the outer periphery of the elastic element, the elastic element rotates together with the fan main shaft, and the elastic element is arranged so that: when the fan main shaft rotates, the elastic element can be deformed along the radial direction of the fan main shaft, and the adjusting portion is close to or abuts against the protrusion; The position of the protrusion relative to the adjusting portion is set such that an air inlet gap between the adjusting portion and the protrusion increases as the rotation speed of the fan main shaft increases.

2. The fan according to claim 1, characterized in that: The wind shield is provided with a through hole, and the fan main shaft passes through the through hole and is fixedly connected to the elastic element.

3. The fan according to claim 2, characterized in that: The elastic element is in a circular ring shape and includes a plurality of elastic units. The plurality of elastic units are arranged around the fan main shaft. The regions where the plurality of elastic units are close to the fan main shaft are connected to each other. In the region where the plurality of elastic units are far away from the fan main shaft, gaps are arranged between adjacent elastic units.

4. The fan according to claim 3, characterized in that: A hollow portion is arranged in the middle of the elastic unit.

5. The fan according to claim 1, characterized in that: The protrusion is located at the inner side of the adjusting portion.

6. The fan according to claim 5, characterized in that: A surface of the regulating portion close to the protruding portion gradually moves away from the regulating portion from outside to inside.

7. The fan according to claim 1, characterized in that: The thickness of the middle region of the elastic element is smaller than the thickness of the adjusting portion.

8. The fan according to claim 1, characterized in that: A surface of the adjusting portion on a side close to the windshield is in contact with the windshield.

9. The fan according to claim 1, characterized in that: A limiting portion is arranged around the outer circumference of the wind shield plate, and the limiting portion is used to limit the elastic element.

10. The fan according to claim 9, characterized in that: The surface of the elastic element close to the limiting portion is a plane corresponding to the limiting portion.

11. The fan according to any one of claims 1 to 10, characterized in that: The elastic element is an elastic membrane.

12. A gas water heater, characterized in that: It comprises a fan as described in any one of claims 1-11.

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