Centrifugally driven electromagnetic regulating device, fan and gas water heater

Abstract

This invention discloses a centrifugally driven electromagnetic regulating device, a fan, and a gas water heater. The centrifugally driven electromagnetic regulating device includes a centrifugal diaphragm and a base connected to the fan shaft. The base has an inner cavity with a ventilation opening. The centrifugal diaphragm is movably disposed in the inner cavity and is used to block the ventilation opening. The fan shaft rotates to drive the base and the centrifugal diaphragm to rotate together. The centrifugal diaphragm moves in the inner cavity under centrifugal force to change the area of ​​its blocking of the ventilation opening, thereby changing the ventilation area of ​​the ventilation opening. This invention cleverly utilizes centrifugal force as the source of power for the centrifugal diaphragm to slide relative to the inner cavity of the base, so as to adjust the position of the centrifugal diaphragm at the ventilation opening in the inner cavity of the base. The transmission process does not use components with large mass, so the overall inertia is small. The centrifugal diaphragm can sensitively respond to changes in rotational speed and flexibly change its position blocking the ventilation opening.

Description

Technical Field

[0001] The invention relates to a centrifugally driven electromagnetic regulating device, 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] Gas water heaters include fans for 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. Especially when the gas pressure is relatively low, if the fan still maintains a normal air supply, it is easy to cause flameout and the actual combustion temperature cannot reach the target temperature. In addition, the size of the air inlet of some fans can be adjusted manually in order to be compatible with other models or to match extreme working conditions. This adjustment method is cumbersome and has a poor user experience. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that the fan air inlet of the gas water heater in the prior art cannot be automatically adjusted, resulting in the air-gas ratio cannot be adjusted, which in turn causes the gas water heater to have incomplete combustion or easy flameout.

[0005] To solve the above technical problem, the present invention provides a centrifugally driven electromagnetic regulating device.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a centrifugally driven electromagnetic regulating device, which is applied to a fan, comprising a centrifugal membrane and a base connected to the fan shaft, the base having an inner cavity, the base having a vent connected to the inner cavity, the centrifugal membrane being movably arranged in the inner cavity and used to cover the vent, the fan shaft rotates to drive the base and the centrifugal membrane to rotate together, the centrifugal membrane moves in the inner cavity under the centrifugal action to change the area of ​​the vent covered by it, thereby changing the ventilation area of ​​the vent.

[0007] In this solution, the fan shaft drives the base to rotate. Since the centrifugal membrane is tightly attached to the inner cavity of the base and blocks the vents, there is friction between the centrifugal membrane and the inner wall of the inner cavity of the base. The base drives the centrifugal membrane to rotate through the friction. A part of the centrifugal membrane can move outward in the centrifugal direction and pull the rest of the centrifugal membrane to move in the inner cavity, changing the area of ​​the vents blocked by the centrifugal membrane, thereby achieving the following: the higher the fan speed, the smaller the area of ​​the vents blocked by the centrifugal membrane and the larger the air inlet area of ​​the vents.

[0008] First, the present invention cleverly utilizes the centrifugal effect as the source power for the centrifugal membrane to slide relative to the inner cavity of the base, so as to adjust the position of the centrifugal membrane at the vent of the inner cavity of the base. The transmission process does not use components with large mass, so the overall inertia is small, and the centrifugal membrane can sensitively sense the changes in the rotation speed and flexibly change its position of blocking the vent; second, when the air volume needs to be increased, the fan speed increases and the air volume is increased. At the same time, the area of ​​the centrifugal membrane blocking the vent is reduced, the air inlet area is increased, and the air volume is further increased. Therefore, compared with the existing fan, the present invention can add more air to the gas per unit time, thereby avoiding flameout due to sudden low-pressure hypoxia in the outside world during gas combustion; third, the present invention does not need to add an external power supply and other transmission components. Compared with the prior art, the structure is simple, the size is smaller, and the weight is lighter.

[0009] Preferably, the centrifugal membrane includes a membrane cavity portion and a centrifugal portion, the base also has a centrifugal cavity connected to the inner cavity, the centrifugal cavity extends outward along the radial direction of the inner cavity, the membrane cavity portion is arranged in the inner cavity to block the vent, the centrifugal portion is arranged in the centrifugal cavity and can perform centrifugal motion in the centrifugal cavity to pull the membrane cavity portion to move in the inner cavity and change the blocking area of ​​the vent by the membrane cavity portion.

[0010] In this solution, the centrifugal membrane rotates driven by the base, and its centrifugal part can move freely radially outward in the centrifugal cavity to pull the membrane cavity part, so that the membrane cavity part changes its position in the inner cavity of the base to block the vent, thereby changing the air inlet area of ​​the vent.

[0011] Preferably, as the external wind flows into the deep part of the inner cavity, the cross-section of the inner cavity remains unchanged along the wind inlet direction; or, the cross-section of the inner cavity gradually increases along the wind inlet direction, and the side of the inner cavity with a larger opening is connected to the centrifugal cavity.

[0012] This scheme has two specific schemes. First, the cross-sectional area of ​​the inner cavity remains unchanged along the air inlet direction. With this scheme, the fan drives the centrifugal membrane to rotate through the base, and the centrifugal membrane can be tightly attached to the wall of the inner cavity. The greater the rotation speed, the tighter the centrifugal membrane fits, and the better the sealing of the vent is blocked. Second, the cross-sectional area of ​​the inner cavity increases along the air inlet direction. When the fan shaft drives the base and the centrifugal membrane to rotate, the greater the rotation speed, the easier it is for the centrifugal membrane to slide relative to the inner wall of the inner cavity and slide toward the centrifugal cavity. Under the same rotation, this design is conducive to reducing the friction of the sliding of the centrifugal membrane and is conducive to accelerating the adjustment of the centrifugal membrane to the blocking area of ​​the passage.

[0013] Preferably, a limiting plate is further provided in the centrifugal chamber, and the limiting plate divides the centrifugal chamber and forms a limiting space to ensure that the centrifugal part moves radially along the centrifugal chamber in the limiting space.

[0014] In this solution, the limiting plate divides the centrifugal cavity into a limiting space, and the centrifugal part can only move radially in the limiting space. The limiting space ensures that the centrifugal part will not move excessively freely in the centrifugal cavity, avoiding the centrifugal parts from folding against each other and being blocked in the centrifugal space, making it difficult to reset.

[0015] Preferably, the centrifugal part further comprises a weight body, and the base drives the weight body to rotate so as to increase the dragging force of the centrifugal part on the membrane cavity part.

[0016] In this scheme, the role of the weight body is to increase the mass of the centrifugal part to improve its centrifugal effect at the same speed, which is beneficial to increase the drag force of the centrifugal part on the membrane cavity part, and avoid the membrane cavity part being tightly attached to the inner wall of the base under high-speed conditions, causing excessive friction, resulting in the centrifugal part being unable to pull the membrane cavity part.

[0017] Preferably, the weight body is annular, its diameter can be changed, and its diameter is positively correlated with the rotation speed of the fan shaft.

[0018] In this solution, the annular weight body is elastic, and the fan drives the centrifugal membrane to rotate through the base, and drives the annular weight body to rotate. The higher the speed of the annular weight body, the larger its diameter. As the diameter of the annular weight body increases, the centrifugal part is pulled toward the periphery.

[0019] Preferably, the weight body is a plurality of mass blocks, and the plurality of mass blocks are evenly distributed circumferentially on the edge of the centrifugal part.

[0020] In this solution, several mass blocks are arranged at intervals, and the fan drives the centrifugal membrane and the mass blocks to rotate together through the base. The higher the rotation speed, the larger the interval between the mass blocks, and all the mass blocks move toward the periphery under the centrifugal force, pulling the centrifugal part to move toward the periphery.

[0021] Preferably, the centrifugally driven electromagnetic regulating device further comprises a driving coil and a permanent magnet, wherein the permanent magnet is on the centrifugal membrane, and the driving coil drives the permanent magnet to move in the inner cavity through magnetic force.

[0022] In this scheme, the driving coil is energized to generate a magnetic field with variable direction and size to control the permanent magnet to drive the centrifugal membrane to move, thereby adding a control method for actively adjusting the movement state of the centrifugal membrane. Compared with the passive adjustment method using centrifugal drive, the active adjustment method is obviously more adjustable and can further accurately control the centrifugal membrane.

[0023] Preferably, the centrifugally driven electromagnetic regulating device further comprises a distance measuring probe, which is arranged opposite to the permanent magnet to detect the movement of the permanent magnet and the degree of compression of the centrifugal membrane.

[0024] In this solution, the distance measuring probe is used to detect the distance between the permanent magnet and the distance measuring probe, so as to determine the movement of the centrifugal membrane and further determine the air inlet area of ​​the fan vent.

[0025] Preferably, the centrifugally driven electromagnetic regulating device also includes a pre-tensioning spring, which is arranged in the membrane cavity portion, with one end of the pre-tensioning spring abutting against the inner wall of the membrane cavity portion, and the other end being connected to or abutting against the inner wall of the base, thereby pushing the compressed centrifugal membrane to reset; and / or, the outer side of the pre-tensioning spring can also abut against the inner wall of the membrane cavity portion, so that the outer wall of the membrane cavity portion is tightly attached to the inner cavity of the base.

[0026] In this solution, a pre-tightening spring is provided in the membrane cavity, so that the centrifugal membrane can be reset more easily, thereby avoiding local folding, which would make it difficult to reset.

[0027] The present invention also provides a fan, which includes the above-mentioned centrifugally driven electromagnetic regulating device.

[0028] The present invention also provides a gas water heater, which comprises the above-mentioned fan.

[0029] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0030] The positive and progressive effects of the present invention are: first, the present invention cleverly utilizes the centrifugal effect as the source power for the centrifugal membrane to slide relative to the inner cavity of the base, so as to adjust the position of the centrifugal membrane at the vent of the inner cavity of the base. The transmission process does not use components with large mass, so the overall inertia is small, and the centrifugal membrane can sensitively sense the changes in the rotation speed and flexibly change its position of blocking the vent; second, when the air volume needs to be increased, the fan speed increases and the air volume is increased. At the same time, the area of ​​the centrifugal membrane blocking the vent is reduced, the air inlet area is increased, and the air volume is further increased. Therefore, compared with the existing fan, the present invention can add more air to the gas per unit time, avoiding flameout due to sudden low-pressure hypoxia in the outside world during gas combustion; third, the present invention does not need to add an external power supply and other transmission components. Compared with the prior art, the structure is simple, the volume is smaller, and the weight is lighter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of a base in an embodiment of a centrifugally driven electromagnetic adjustment device of the present invention.

[0032] Figure 2 for Figure 1 A partial cross-sectional view of .

[0033] Figure 3It is a structural schematic diagram of the cover plate in the present invention.

[0034] Figure 4 for Figure 3 Schematic diagram of the structure on the back of the cover.

[0035] Figure 5 It is a structural schematic diagram of an embodiment of the weight body in the present invention.

[0036] Description of reference numerals:

[0037] Centrifugal membrane 10

[0038] Base 11

[0039] Inner cavity 12

[0040] Vent 13

[0041] Membrane cavity 14

[0042] Centrifugal part 15

[0043] Centrifugal chamber 16

[0044] Limiting plate 17

[0045] Limited space 18

[0046] Weight body 19

[0047] Driving coil 20

[0048] Permanent magnet 21

[0049] Distance measuring probe 22

[0050] Preload spring 23

[0051] Cover 24

[0052] Air Inlet 25

[0053] Accommodation slot 26 DETAILED DESCRIPTION

[0054] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0055] Figure 1-Figure 5 The embodiment of the centrifugal driven electromagnetic regulating device of the present invention is shown, which is applied to a fan, such as Figure 2As shown, it includes a centrifugal membrane 10 and a base 11 connected to the fan shaft, the base 11 has an inner cavity 12, and the base 11 is provided with a vent 13 connected to the inner cavity 12. The centrifugal membrane 10 is movably arranged in the inner cavity 12 and is used to cover the vent 13. The fan shaft rotates to drive the base 11 and the centrifugal membrane 10 to rotate together. The centrifugal membrane 10 moves in the inner cavity 12 under the centrifugal effect to change the area of ​​the vent 13 covered, thereby changing the ventilation area of ​​the vent 13.

[0056] In this example, the fan shaft drives the base 11 to rotate, the centrifugal membrane 10 is close to the inner cavity 12 of the base 11 and blocks the vent 13. There is friction between the centrifugal membrane 10 and the inner wall of the inner cavity 12 of the base 11. The base 11 drives the centrifugal membrane 10 to rotate together through the friction. A part of the centrifugal membrane 10 can move outward along the centrifugal direction and pull the rest of the centrifugal membrane 10 to move in the inner cavity 12, thereby changing the area of ​​the vent 13 blocked by the centrifugal membrane 10, thereby achieving that the higher the fan speed, the smaller the area of ​​the vent 13 blocked by the centrifugal membrane 10, and the larger the air inlet area of ​​the vent 13.

[0057] First, this example cleverly utilizes the centrifugal effect as the source power for the centrifugal membrane 10 to slide relative to the inner cavity 12 of the base 11, so as to adjust the position of the centrifugal membrane 10 at the vent 13 of the inner cavity 12 of the base 11. The transmission process does not use components with large mass, so the overall inertia is small, and the centrifugal membrane 10 can sensitively sense the changes in the rotation speed and flexibly change the position of blocking the vent 13; second, when the air volume needs to be increased, the fan speed increases and the air volume is increased. At the same time, the area of ​​the centrifugal membrane 10 blocking the vent 13 is reduced, the air inlet area is increased, and the air volume is further increased. Therefore, compared with the existing fan, this example can add more air to the gas per unit time, so as to avoid flameout due to sudden low-pressure hypoxia in the outside world during the gas combustion process; third, this example does not need to add an external power supply and other transmission components. Compared with the prior art, the structure is simple, the volume is smaller, and the weight is lighter.

[0058] In other implementations, the centrifugal membrane 10 and the inner wall of the inner cavity 12 of the base 11 are attracted to each other through magnetic force, so that the base 11 drives the centrifugal membrane 10 to rotate. Specifically, a first magnet is provided on the outside of the centrifugal membrane 10, and a second magnet is provided on the wall of the inner cavity 12 of the base 11, and the first magnet and the second magnet attract each other.

[0059] In other implementations, the outer side of the centrifugal membrane 10 slides on the inner wall of the base 11. Specifically, a sliding block is provided on the outer side of the centrifugal membrane 10, and the wall of the inner cavity 12 of the base 11 has a sliding groove, and the sliding groove is embedded in the sliding groove and slides therein.

[0060] like Figure 2As shown, preferably, the centrifugal membrane 10 includes a membrane cavity portion 14 and a centrifugal portion 15, the base 11 also has a centrifugal cavity 16 connected to the inner cavity 12, the centrifugal cavity 16 extends outward in the radial direction of the inner cavity 12, the membrane cavity portion 14 is arranged in the inner cavity 12 to block the vent 13, the centrifugal portion 15 is arranged in the centrifugal cavity 16, and can perform centrifugal motion in the centrifugal cavity 16 to pull the membrane cavity portion 14 to move in the inner cavity 12 and change the blocking area of ​​the membrane cavity portion 14 on the vent 13.

[0061] In this example, the centrifugal membrane 10 rotates driven by the base 11, and its centrifugal portion 15 can move freely radially outward in the centrifugal chamber 16 to pull the membrane cavity portion 14, so that the membrane cavity portion 14 changes its position in the inner cavity 12 of the base 11 to block the vent 13, thereby changing the air inlet area of ​​the vent 13.

[0062] Preferably, as the external wind flows into the deep part of the inner cavity 12 , the cross-section of the inner cavity 12 remains unchanged along the wind inlet direction; or, the cross-section of the inner cavity 12 gradually increases along the wind inlet direction, and the side with the larger opening of the inner cavity 12 is connected to the centrifugal cavity 16 .

[0063] Regarding the first embodiment of the inner cavity 12, the cross-sectional area of ​​the inner cavity 12 remains unchanged along the air inlet direction. With this solution, the fan drives the centrifugal membrane 10 to rotate through the base 11, and the centrifugal membrane 10 can be tightly attached to the wall of the inner cavity 12. The greater the rotation speed, the tighter the centrifugal membrane 10 fits, and the better the sealing of the vent 13 is blocked.

[0064] like Figure 2 Specifically, the shape of the inner cavity 12 of the base 11 includes but is not limited to a cylinder.

[0065] Regarding the second embodiment of the inner cavity 12, the cross-sectional area of ​​the inner cavity 12 increases along the air inlet direction. When the fan shaft drives the base 11 and the centrifugal membrane 10 to rotate, the greater the rotation speed, the easier it is for the centrifugal membrane 10 to slide relative to the inner wall of the inner cavity 12 and slide toward the centrifugal cavity 16. Under the same rotation, this design is conducive to reducing the friction force of the sliding of the centrifugal membrane 10, and is conducive to accelerating the centrifugal membrane 10 to adjust the blocking area of ​​the passage.

[0066] In other embodiments, the shape of the inner cavity 12 of the base 11 includes but is not limited to a cone.

[0067] Specifically, the generatrix of the vertebral body forms an angle α with its axis, and the friction coefficient between the inner cavity 12 of the base 11 and the centrifugal membrane 10 is μ, which must satisfy tanα<μ. In this case, the self-locking state between the centrifugal membrane 10 and the wall of the inner cavity 12 is lost, that is, no matter how the base 11 rotates, the centrifugal membrane 10 can slide relative to the inner cavity 12 of the base 11, and its sliding speed is proportional to the rotation speed of the base 11. This can avoid the centrifugal membrane 10 from getting stuck on the inner cavity 12, thereby avoiding the centrifugal membrane 10 from being unable to adjust the blocking area of ​​the vent 13.

[0068] like Figure 2 As shown, preferably, a limiting plate 17 is further provided in the centrifugal chamber 16 , and the limiting plate 17 divides the centrifugal chamber 16 and forms a limiting space 18 to ensure that the centrifugal part 15 moves radially along the centrifugal chamber 16 in the limiting space 18 .

[0069] In this example, the limiting plate 17 divides the centrifugal chamber 16 into a limiting space 18, and the centrifugal part 15 can only move radially in the limiting space 18. The limiting space 18 ensures that the centrifugal part 15 will not move excessively freely in the centrifugal chamber 16, thereby preventing the centrifugal parts 15 from folding against each other and being blocked in the centrifugal space, making it difficult to reset.

[0070] Preferably, the centrifugal part 15 further includes a weight body 19 , and the base 11 drives the weight body 19 to rotate, so as to increase the drag force of the centrifugal part 15 on the membrane cavity part 14 .

[0071] In this example, the weight body 19 serves to increase the mass of the centrifugal portion 15 so as to enhance the centrifugal effect at the same rotation speed, thereby facilitating increasing the dragging force of the centrifugal portion 15 on the membrane cavity portion 14 and preventing the membrane cavity portion 14 from being tightly attached to the inner wall of the base 11 at high speed, causing excessive friction and resulting in the centrifugal portion 15 being unable to pull the membrane cavity portion 14.

[0072] like Figure 2 As shown, preferably, the weight body 19 is annular, and its diameter can be changed, and its diameter is positively correlated with the rotation speed of the fan shaft.

[0073] In this example, the annular weight body 19 is elastic, and the fan drives the centrifugal membrane 10 to rotate through the base 11, and drives the annular weight body 19 to rotate. The higher the rotation speed of the annular weight body 19, the larger its diameter. In the process of increasing the diameter of the annular weight body 19, the centrifugal part 15 is pulled to move toward the periphery.

[0074] Specifically, the annular body has a fracture (such as Figure 5 As shown), the annular body itself is made of elastic material, and the thickness of the annular body is greater than the thickness of the centrifugal membrane 10, thereby reducing the friction between the centrifugal membrane 10 and the wall of the limiting space 18 and extending the service life.

[0075] Preferably, the weight body 19 is a plurality of mass blocks, and the plurality of mass blocks are evenly distributed circumferentially on the edge of the centrifugal part 15 .

[0076] In this example, several mass blocks are arranged at intervals, and the fan drives the centrifugal membrane 10 and the mass blocks to rotate together through the base 11. The higher the rotation speed, the larger the interval between the mass blocks, and all the mass blocks move toward the periphery under the centrifugal effect, pulling the centrifugal part 15 to move toward the periphery.

[0077] Specifically, the shape of the centrifugal block includes but is not limited to a sphere, a cylinder, and a block, and the thickness of the centrifugal block is greater than the thickness of the centrifugal membrane 10. The upper and lower ends of the centrifugal block can be against the upper and lower walls of the limiting space 18, thereby reducing the friction between the centrifugal membrane 10 and the wall of the limiting space 18 and extending the service life.

[0078] like Figure 1 and Figure 2 As shown, preferably, the centrifugally driven electromagnetic regulating device further includes a driving coil 20 and a permanent magnet 21 . The permanent magnet 21 is on the centrifugal membrane 10 . The driving coil 20 drives the permanent magnet 21 to move in the inner cavity 12 through magnetic force.

[0079] In this example, the driving coil 20 is energized to generate a magnetic field whose direction and size can be changed, so as to control the permanent magnet 21 to drive the centrifugal membrane 10 to move, thereby adding a control method for actively adjusting the movement state of the centrifugal membrane 10. Compared with the passive adjustment method using centrifugal drive, the active adjustment method is obviously more adjustable and can further accurately control the centrifugal membrane 10.

[0080] like Figure 2 As shown, preferably, the centrifugally driven electromagnetic regulating device further includes a distance measuring probe 22 , which is arranged opposite to the permanent magnet 21 to detect the movement of the permanent magnet 21 and the degree of compression of the centrifugal membrane 10 .

[0081] In this example, the distance measuring probe 22 is used to detect the distance between the permanent magnet 21 and the distance measuring probe 22 , so as to determine the movement amount of the centrifugal membrane 10 , and further determine the air inlet area of ​​the fan vent 13 .

[0082] like Figure 2 As shown, preferably, the centrifugally driven electromagnetic regulating device also includes a pre-tensioning spring 23, which is arranged in the membrane cavity portion 14, one end of the pre-tensioning spring 23 is against the inner wall of the membrane cavity portion 14, and the other end is connected to or against the inner wall of the base 11, pushing the compressed centrifugal membrane 10 to reset; and / or, the outer side of the pre-tensioning spring 23 can also resist the inner wall of the membrane cavity portion 14, so that the outer wall of the membrane cavity portion 14 is tightly attached to the inner cavity 12 of the base 11.

[0083] In this example, by arranging a preload spring 23 in the membrane cavity 14, the centrifugal membrane 10 can be reset more easily, thereby preventing the centrifugal membrane 10 from being partially folded, which would make it difficult to reset.

[0084] The present invention also provides a fan, which includes the above-mentioned centrifugally driven electromagnetic regulating device.

[0085] like Figure 3 and Figure 4 As shown, the fan also includes a fan body and a cover plate 24. The cover plate 24 is arranged on the end face of the fan body on the air inlet side. The cover plate 24 has an air inlet 25 and a receiving groove 26. The base 11 has a port for air inlet. The base 11 is arranged in the receiving groove 26. One end of the base 11 for air inlet extends into the air inlet 25. The inner cavity 12 of the base 11 is connected to the outside atmosphere through the air inlet 25.

[0086] The present invention also provides a gas water heater, which comprises the above-mentioned fan.

[0087] In this embodiment, the above-mentioned fan is applied to the gas water heater, so that the gas water heater has a good air adjustment function, and can add more air to the gas water heater per unit time to avoid flameout due to sudden low pressure and hypoxia in the outside world during gas combustion. At the same time, it can also prevent excessive air volume from entering the gas water heater from the outside, causing flameout inside the gas water heater.

[0088] 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 centrifugally driven electromagnetic regulating device, Features: It is applied to a fan, the centrifugally driven electromagnetic regulating device comprises a centrifugal membrane and a base connected to the fan shaft, the base has an inner cavity, a vent is provided on the base, the centrifugal membrane is movably arranged in the inner cavity and used to cover the vent, the fan shaft rotates to drive the base and the centrifugal membrane to rotate together, the centrifugal membrane moves in the inner cavity under the centrifugal action to change the area of ​​the vent covered by the centrifugal membrane, thereby changing the ventilation area of ​​the vent; The centrifugal membrane includes a membrane cavity portion and a centrifugal portion. The base also has a centrifugal cavity connected to the inner cavity. The centrifugal cavity extends outward along the radial direction of the inner cavity. The membrane cavity portion is arranged in the inner cavity to cover the vent. The centrifugal portion is arranged in the centrifugal cavity and can perform centrifugal movement in the centrifugal cavity to pull the membrane cavity portion to move in the inner cavity and change the covering area of ​​the membrane cavity portion on the vent.

2. The centrifugally driven electromagnetic regulating device according to claim 1, Features: Along the direction in which the external wind flows into the deep part of the inner cavity, the cross section of the inner cavity remains unchanged along the wind inlet direction; Alternatively, the cross-section of the inner cavity gradually increases along the air inlet direction, and the side of the inner cavity with a larger opening is connected to the centrifugal cavity.

3. The centrifugally driven electromagnetic regulating device according to claim 1, Features: A limiting plate is also provided in the centrifugal chamber, and the limiting plate divides the centrifugal chamber to form a limiting space, so as to ensure that the centrifugal part moves in the limiting space along the radial direction of the centrifugal chamber.

4. The centrifugally driven electromagnetic regulating device according to claim 1, Features: The centrifugal part further includes a weight body, and the base drives the weight body to rotate to increase the drag force of the centrifugal part on the membrane cavity part.

5. The centrifugally driven electromagnetic regulating device according to claim 4, Features: The weight body is annular, and its diameter can be changed, and its diameter is positively correlated with the rotation speed of the fan shaft.

6. The centrifugally driven electromagnetic regulating device according to claim 4, Features: The weight body is a plurality of mass blocks, and the plurality of mass blocks are evenly distributed circumferentially on the edge of the centrifugal part.

7. The centrifugally driven electromagnetic regulating device according to claim 1, Features: The centrifugally driven electromagnetic regulating device further comprises a driving coil and a permanent magnet. The permanent magnet is on the centrifugal membrane. The driving coil drives the permanent magnet to move in the inner cavity through magnetic force.

8. The centrifugally driven electromagnetic regulating device according to claim 7, Features: The centrifugally driven electromagnetic regulating device further comprises a distance measuring probe, which is arranged opposite to the permanent magnet to detect the movement of the permanent magnet and the degree of compression of the centrifugal membrane.

9. The centrifugally driven electromagnetic regulating device according to claim 1, Features: The centrifugally driven electromagnetic regulating device further comprises a preload spring, which is arranged in the membrane cavity, one end of which abuts against the inner wall of the membrane cavity, and the other end of which is connected to or abuts against the inner wall of the base, so as to push the compressed centrifugal membrane to reset; And / or, the outer side of the preload spring can also abut against the inner wall of the membrane cavity portion, so that the outer wall of the membrane cavity portion is in close contact with the inner cavity of the base.

10. A fan, Features: It comprises a centrifugally driven electromagnetic regulating device as claimed in any one of claims 1-9.

11. A gas water heater, Features: It comprises a fan as claimed in claim 10 .

Images