A mixed flow fan

Abstract

The present disclosure relates to a mixed flow fan. The mixed flow fan can comprise a motor, a fan hub, a casing and a tail vertebra, characterized in that the casing and the tail vertebra are connected through a first control device, the inside of the tail vertebra comprises a second control device and a fixing structure, the second control device is connected with the motor through the fixing structure, the second control device is used to close the tail vertebra and the fan hub when the motor works, and the first control device is used to make the tail vertebra abut against the casing when the motor does not work. According to the technical scheme provided by the present disclosure, the tail vertebra can abut against the casing to serve as a check valve when the mixed flow fan does not work, so as to avoid backflow of oil fume and reduce the cost of the whole machine.

Description

Technical Field

[0001] This disclosure relates to the field of range hood technology, and more particularly to a diagonal flow fan. Background Technology

[0002] Range hoods are becoming increasingly important in people's daily lives. A diagonal flow fan is a type of range hood. The exhaust hood and vent pipe of a range hood are crucial components, transporting cooking fumes to the building's shared ventilation duct. The exhaust hood's main function is to rectify, appropriately slow down, and pressurize the airflow within the volute before delivering it through the vent pipe to the shared ventilation duct. Currently, range hoods on the market typically have a backflow preventer inside the exhaust hood to ensure that cooking fumes do not flow back after being exhausted, i.e., to prevent backflow when the range hood is not in use. When the range hood is not operating, the valve automatically closes under gravity, thus suppressing the backflow of cooking fumes.

[0003] In existing technology, because the exhaust hood is located in the flow channel, after the range hood has been working for a certain period of time, a large amount of condensed oil will appear on the check valve plate. If the ambient temperature is low, or the user does not use the range hood frequently, when the exhaust hood is closed, the condensed oil on the check valve plate will stick the check valve plate to the rubber gasket. If the sticking area is large, or if the range hood itself has low air pressure, the check valve plate will not be able to open, which will seriously affect the operation of the range hood. In addition, when the range hood is running, the airflow passes through the check valve, and the check valve has a certain pressure loss, which makes the fan have to increase its speed to compensate for this pressure loss, resulting in increased fan noise. Summary of the Invention

[0004] This disclosure provides a mixed-flow fan to at least solve the problems of difficulty in opening the backflow preventer valve and excessive noise in range hoods in the related art. The technical solution of this disclosure is as follows:

[0005] According to a first aspect of the present disclosure, a mixed-flow fan is provided, comprising a motor (1), a fan hub (2), a casing (3), and a tail cone (4), characterized in that the casing (3) and the tail cone (4) are connected by a first control device (5), the tail cone (4) includes a second control device (6) and a fixing structure (7) inside, the second control device (6) is connected to the motor (1) through the fixing structure (7), the second control device (6) is used to close the tail cone (4) with the fan hub (2) when the motor (1) is working, and the first control device (5) is used to abut the tail cone (4) against the casing (3) when the motor (1) is not working.

[0006] In one possible implementation, the second control device (6) is a magnetic device comprising a metal ring (8) and a wire coil (9) wound around the metal ring (8).

[0007] In one possible implementation, the motor (1) further includes motor wires connected to the conductor coil (9).

[0008] In one possible implementation, the interior of the coccyx (4) further includes a metal component (10), which is fixed inside the coccyx (4) and is disposed opposite to the second control device (6).

[0009] In one possible implementation, the end of the fixing structure (7) away from the motor (1) is fixedly connected to the tip of the tail cone (4).

[0010] In one possible implementation, when the motor (1) is working, the control force F2 of the second control device (6) is greater than the control force F1 of the first control device (5).

[0011] In one possible implementation, when the motor (1) is not working, the control force F3 of the first control device (5) is greater than the control force F4 of the second control device (6).

[0012] In one possible implementation, the material of the coccyx (4) is the material of the air outlet hose.

[0013] In one possible implementation, the first control device (5) is an elastic component, which includes a spring.

[0014] In one possible implementation, the coccyx (4) is an umbrella-shaped structure.

[0015] The technical solutions provided by the embodiments of this disclosure bring at least the following beneficial effects: The mixed-flow fan of this disclosure includes a motor, a fan hub, a casing, and a tail cone. The casing and the tail cone are connected through a first control device. The tail cone includes a second control device and a fixing structure inside. The second control device is connected to the motor through the fixing structure. The second control device is used to close the tail cone and the fan hub when the motor is working. The first control device is used to make the tail cone abut against the casing when the motor is not working. By setting the second control device inside the tail cone, when the motor is energized, the tail cone moves towards the fan hub and closes on the fan hub. At this time, the tail cone plays a guiding role, and there is no resistance when the tail cone acts as a guiding component, which can reduce wind pressure. By connecting the casing and the tail cone through the first control device, when the motor is not energized, the first control device makes the tail cone abut against the casing. At this time, the tail cone plays the role of a check valve. The tail cone is easy to control to open and can prevent the backflow of oil fumes.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure, and are not intended to unduly limit this disclosure.

[0018] Figure 1 This is a schematic cross-sectional view of a mixed-flow fan when it is not in operation, according to an exemplary embodiment.

[0019] Figure 2 This is a schematic cross-sectional view of a mixed-flow fan in operation according to an exemplary embodiment;

[0020] Figure 3 This is a schematic diagram illustrating the operation of a mixed-flow fan according to an exemplary embodiment;

[0021] Figure 4 This is a schematic diagram of the tail cone of a mixed-flow fan during operation, according to an exemplary embodiment.

[0022] Figure 5 This is a schematic diagram of a mixed-flow fan when it is not in operation, according to an exemplary embodiment.

[0023] Figure 6 This is a schematic diagram of the tail cone of a mixed-flow fan when it is not in operation, according to an exemplary embodiment.

[0024] Figure 7 This is a schematic diagram of a second control device according to an exemplary embodiment;

[0025] Figure 8 This is an enlarged schematic diagram of a metal component portion according to an exemplary embodiment.

[0026] The reference numerals in the figure should be: 1-motor, 2-fan hub, 3-casing, 4-tail cone, 5-first control device, 6-second control device, 7-fixed structure, 8-metal ring, 9-conductor coil, 10-metal component. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0028] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0029] Please see Figure 1 , Figure 2 , Figure 1 This is a schematic cross-sectional view of a mixed-flow fan when it is not in operation, according to an exemplary embodiment. Figure 2 This is a cross-sectional schematic diagram of a mixed-flow fan in operation according to an exemplary embodiment. The mixed-flow fan includes a motor (1), a fan hub (2), a casing (3), and a tail cone (4). The casing (3) and the tail cone (4) are connected by a first control device (5). The tail cone (4) includes a second control device (6) and a fixing structure (7). The second control device (6) is connected to the motor (1) through the fixing structure (7). The second control device (6) is used to close the tail cone (4) with the fan hub (2) when the motor (1) is working. The first control device (5) is used to abut the tail cone (4) against the casing (3) when the motor (1) is not working.

[0030] In the embodiments of this specification, the mixed-flow fan can be a type of range hood. The mixed-flow fan, also known as a mixed-flow fan, is a fan that is between an axial fan and a centrifugal fan. The impeller of the mixed-flow fan makes the air move both centrifugally and axially, and the movement of the air inside the casing is a mixture of axial and centrifugal motion.

[0031] In the embodiments of this specification, the first control device (5) may refer to the device that causes the tail cone to abut against the casing. For example, it may be a device that can restore its original size and shape after deformation. Specifically, it may be a spring.

[0032] In the embodiments of this specification, the second control device (6) can refer to the device that causes the tail cone to close with the fan hub. For example, it can be a device that generates a magnetic field in different ways. Specifically, it can be a magnetic device. The magnetic device can be a device that combines a wire coil and a metal ring. The magnetic device is connected to the motor through a fixed structure, that is, the wire coil is connected to the motor. When the motor is energized, a magnetic field is generated around the wire coil.

[0033] In one possible implementation, the interior of the coccyx (4) includes a second control device (6) and a fixing structure (7), the second control device (6) being connected to the motor (1) via the fixing structure (7). The fixing structure (7) can be snapped into the interior of the coccyx (4), specifically, it can be the tip of the coccyx (4), but this application does not limit this.

[0034] In one possible implementation, the interior of the coccyx (4) may also include a ferromagnetic material, for example, iron, cobalt, nickel, etc. This application does not limit this. It should be noted that the ferromagnetic material is arranged opposite to the second control device, and the ferromagnetic material can be fixed inside the coccyx by means of bonding, snapping, etc. This application does not limit this.

[0035] Please see Figure 3 , Figure 4 , Figure 3 This is a schematic diagram illustrating the operation of a mixed-flow fan according to an exemplary embodiment. Figure 4 This is a schematic diagram of the tail cone of a mixed-flow fan during operation, according to an exemplary embodiment.

[0036] In one possible implementation, the second control device (6) is a magnetic device. The magnetic device can be a combination of a wire coil (9) and a metal ring (8). When the mixed flow fan is working, the motor (1) inside the mixed flow fan is also in working condition. The motor (1) is energized at this time. The magnetic device is connected to the motor (1). The current is transmitted to the magnetic device through the wire coil (9) and generates a magnetic field by electromagnetism. The ferromagnetic material inside the tail cone (4) relative to the magnetic device is subjected to electromagnetic force and moves towards the metal ring (8) of the magnetic device, causing the tail cone (4) to close towards the fan hub (2) until the tail cone (4) and the fan hub (2) are in complete contact and no longer contract.

[0037] Please see Figure 5 , Figure 6 , Figure 5This is a schematic diagram of a mixed-flow fan in non-operation mode, according to an exemplary embodiment. Figure 6 This is a schematic diagram of the tail cone of a mixed-flow fan when it is not in operation, according to an exemplary embodiment.

[0038] In one possible implementation, the first control device (5) is an elastic component. When the mixed flow fan stops working, the motor (1) inside the mixed flow fan is also in a stopped working state. The motor (1) is not powered at this time. The magnetic device is connected to the motor (1). The magnetic device does not generate electromagnetic force when it is powered. The casing (3) and the tail cone (4) are connected through the elastic component. At this time, the elastic component uses its own elasticity to stretch the tail cone (4) until the tail cone (4) and the casing (3) are completely in contact.

[0039] By installing a second control device inside the tail cone, the tail cone closes onto the fan hub when the fan is running. At this time, the tail cone can act as a flow guide component, playing a role in guiding and diffusing the flow. The casing and the tail cone are connected by a first control device. When the motor is not running, the first control device stretches the tail cone to fully abut against the casing, keeping the oil fume return channel of the mixed flow fan completely closed, acting as a check valve to suppress oil fume backflow. Furthermore, by controlling the opening and closing of the tail cone through this design, the tail cone can both guide and diffuse the flow when the motor is running, reducing the pressure loss caused by a separate check valve plate and the noise of the mixed flow fan, and also act as a check valve to suppress oil fume backflow when the motor is not running, reducing the number of check valve components and lowering the overall cost of the machine.

[0040] Please see Figure 7 , Figure 7 This is a schematic diagram of a second control device according to an exemplary embodiment. The second control device (6) is a magnetic device, which includes a metal ring (8) and a wire coil (9) wound on the metal ring (8).

[0041] It should be noted that this instruction manual utilizes the principle of electromagnetism. Electromagnetism refers to the phenomenon where a current flowing through a metal wire generates a circular magnetic field in the space around the wire. The greater the current flowing through the wire, the stronger the magnetic field. The magnetic field is circular and surrounds the wire.

[0042] In the embodiments described in this specification, the wire coil (9) is wound on the metal ring (8), and the number of turns of the wire coil can be 8 turns, 10 turns, 20 turns, etc., which is not limited in this application.

[0043] The wire coil can carry electricity, and the current under the metal ring will generate a magnetic field, which in turn can generate an electromagnetic force that causes the tail cone to close towards the wind turbine hub.

[0044] The motor (1) also includes a motor wire, which is connected to the conductor coil (9).

[0045] In the embodiments described in this specification, the motor wire (not shown in the figure) may refer to the internal wiring of the motor.

[0046] Connecting a wire coil to a motor wire allows the wire to carry current, generating a magnetic field near the wire coil based on the principle of electromagnetism, which in turn produces electromagnetic force.

[0047] like Figure 8 As shown, Figure 8 This is a schematic diagram of a metal component according to an exemplary embodiment; the interior of the coccyx (4) also includes a metal component (10), the metal component (10) is fixed inside the coccyx (4), and the metal component (10) is disposed opposite to the second control device (6).

[0048] In the embodiments described in this specification, the metal component (10) can be fixed inside the coccyx (4) by means of adhesive or snap-fit, and this application does not limit this; the metal component (10) is arranged opposite to the second control device (6).

[0049] In the embodiments of this specification, metal components may refer to ferromagnetic metal materials, such as iron, cobalt, nickel, etc., and this application does not limit them.

[0050] Ferromagnetic metal components can be attracted to the metal by the electromagnetic force of the magnetic field, causing the tail cone to close on the wind turbine hub.

[0051] The end of the fixed structure (7) away from the motor (1) is fixedly connected to the tip of the tailbone (4).

[0052] In the embodiments described in this specification, the material of the fixing structure can be a rigid metal material, for example, steel or other materials, and this application does not limit this.

[0053] In one possible implementation, the end of the fixing structure (7) away from the motor (1) is a plug rod, and the tip of the tail cone (4) has a groove that matches the plug rod of the fixing structure (7). The end of the fixing structure (7) away from the motor (1) is engaged with the tip of the tail cone (4).

[0054] The coccyx needs a fixed support point to open or close, and a fixed structure can fix the coccyx in place.

[0055] When the motor (1) is working, the control force F2 of the second control device (6) is greater than the control force F1 of the first control device (5).

[0056] In one possible implementation, when the motor (1) is working, the motor is energized, the second control device (6) is energized to generate a magnetic field and produce an electromagnetic force F2, the elastic force of the first control device is F1, and the electromagnetic force F2 of the second control device (6) is greater than the elastic force F1 of the first control device (5).

[0057] The tail cone of the mixed-flow fan is controlled by two control forces. When the motor is energized, the tail cone needs to close on the fan hub to act as a guide. Therefore, the control force of the second control device inside the tail cone needs to be greater than the control force of the first control device outside the tail cone to break free from the control force of the first control device and retract.

[0058] When the motor (1) is not working, the control force F3 of the first control device (5) is greater than the control force F4 of the second control device (6).

[0059] In one possible implementation, when the motor (1) is not working, the motor is not powered, the control force of the second control device (6) is F4, which is equal to 0, and the elastic force of the first control device (5) is F3. The elastic force F3 of the first control device (5) is greater than the control force F4 of the second control device (6).

[0060] The tail cone of the mixed-flow fan is controlled by two control forces. When the motor is not powered, the tail cone needs to open and abut against the casing to act as a check valve. Therefore, the control force of the first control device outside the tail cone needs to be greater than the control force of the second control device inside the tail cone.

[0061] The material of the coccyx (4) is the material of the air outlet hose.

[0062] In the embodiments of this specification, the air outlet hose may refer to a flexible material, for example, it may be a pure copper material, but this application does not limit it.

[0063] The coccyx is made of a flexible material similar to an air duct, which is beneficial for the contraction and expansion of the coccyx.

[0064] The first control device (5) is an elastic component, which includes a spring.

[0065] The elastic component itself can stretch and contract, carrying the tailbone and stretching it to abut against the casing.

[0066] Please see Figure 3 , Figure 5 , Figure 3 This is a schematic diagram illustrating the operation of a mixed-flow fan according to an exemplary embodiment. Figure 5 This is a schematic diagram of a mixed-flow fan in non-operation mode according to an exemplary embodiment; the tail cone (4) is an umbrella-shaped structure.

[0067] Figure 3and Figure 5 The diagrams show the tail cone in both retracted and open states. The tail cone is designed with an umbrella-shaped structure, which makes it easy to retract to form a guide when the fan is working and expand to cover the entire oblique flow fan inlet when the fan is not working, thus preventing the backflow of oil fumes.

[0068] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0069] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0070] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0071] It should be noted that the embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

[0072] It should be noted that the order of the embodiments described above is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0073] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mixed-flow fan, comprising a motor (1), a fan hub (2), a casing (3), and a tail cone (4), characterized in that, The casing (3) and the tail cone (4) are connected by a first control device (5). The tail cone (4) includes a second control device (6) and a fixing structure (7). The second control device (6) is connected to the motor (1) through the fixing structure (7). The second control device (6) is used to close the tail cone (4) with the fan hub (2) when the motor (1) is working. The first control device (5) is used to make the tail cone (4) abut against the casing (3) when the motor (1) is not working. The second control device (6) is a magnetic device, which includes a metal ring (8) and a wire coil (9), the wire coil (9) being wound around the metal ring (8); the motor (1) also includes a motor wire, the motor wire being connected to the wire coil (9).

2. The mixed-flow fan according to claim 1, characterized in that, The interior of the coccyx (4) also includes a metal component (10), which is fixed inside the coccyx (4) and is disposed opposite to the second control device (6).

3. The mixed-flow fan according to claim 1, characterized in that, The end of the fixed structure (7) away from the motor (1) is fixedly connected to the tip of the tailbone (4).

4. The mixed-flow fan according to claim 1, characterized in that, When the motor (1) is working, the control force F2 of the second control device (6) is greater than the control force F1 of the first control device (5).

5. The mixed-flow fan according to claim 1, characterized in that, When the motor (1) is not working, the control force F3 of the first control device (5) is greater than the control force F4 of the second control device (6).

6. The mixed-flow fan according to claim 1, characterized in that, The material of the coccyx (4) is the material of the air outlet hose.

7. The mixed-flow fan according to claim 1, characterized in that, The first control device (5) is an elastic component, which includes a spring.

8. The mixed-flow fan according to claim 1, characterized in that, The coccyx (4) has an umbrella-shaped structure.

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