Novel turbofan

Abstract

The utility model discloses a novel turbofan which aims at solving the technical problems that in the prior art, the heat dissipation effect is poor, the air outlet efficiency is not high, wiring is scattered, and connecting wire protection is poor. The novel turbofan comprises a fan upper cover, a fan shell and a fan bottom cover. Wherein the fan upper cover and the fan shell form an air chamber, and a rotatable impeller is arranged in the air chamber; the fan shell and the fan bottom cover form a motor chamber, and a built-in motor is fixed in the motor chamber; the fan upper cover comprises an air inlet, an arc-shaped inner wall matched with the blade curve of the impeller, and a first annular air channel tangent to the centrifugal air flow channel outlet of the impeller; the fan shell comprises an impeller rotating platform on the top, a second annular air channel tangent to the centrifugal air flow channel, a plurality of annular cooling fins and a flexible wire protecting block. The flexible wire protection block comprises a main body matched with the wall body of the fan shell, a clamping groove formed in the top face of the main body, arc-shaped limiting parts arranged on the two sides and a wiring hole matched with a motor connecting wire.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan equipment technical field especially relates to a novel turbine fan. BACKGROUND

[0002] In the modern medical field, a ventilator is a medical device that can replace, control or assist normal human respiration, which plays a key role in the treatment of respiratory failure caused by various reasons, anesthesia and respiratory management in large-scale surgery, respiratory support treatment and emergency resuscitation, and its application in the household market is also becoming more and more popular. One of the key components of the ventilator is the turbine fan, which is responsible for providing appropriate pressure and flow to deliver the required gas for breathing.

[0003] The existing turbine fan is generally mainly composed of a volute, an impeller and a motor. Under the same motor power condition, some conventional structure turbine fans on the market have the problems of poor heat dissipation effect or low air outlet efficiency. If the heat dissipation effect is poor, the impeller will bear excessive thermal stress under the condition of continuous high temperature operation, resulting in material fatigue deformation or rupture, and various components will accelerate aging in a long time high temperature environment. On the one hand, it is easy to shorten the overall service life of the turbine fan, and on the other hand, insufficient heat dissipation may cause faults of various components, affect the performance of the fan, and even cause fire or other safety accidents. In addition, some conventional structure turbine fans on the market also have the problems of scattered wiring and poor connection line protection, which affect the service life of the fan. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a novel turbine fan to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A novel turbine fan comprises a fan upper cover, a fan shell body threadedly connected with the fan upper cover and a fan bottom cover threadedly connected with the fan shell body from top to bottom. The fan upper cover and the fan shell body constitute an air chamber, and the air chamber is internally provided with a rotatable impeller. The fan shell body and the fan bottom cover constitute a motor chamber, and the motor chamber is internally fixed with a motor. The motor comprises a central shaft extending through the fan shell body into the air chamber. The impeller is fixed to the top end of the central shaft. The motor drives the central shaft to rotate, and drives the impeller fixed to the top end of the central shaft to rotate.

[0007] The impeller comprises a plurality of curved blades. The blades are distributed in a centrifugal spiral around the central axis of the impeller. Adjacent blades constitute a centrifugal air flow channel for generating rotating air flow. The blades comprise a horizontal air inlet face at the top end, a fluid type curved main body at the middle and a vertical air outlet face at the tail end, which are integrally formed and connected. The impeller is a gradually widened conical body from top to bottom, and the conical bevel is an inwardly concave arc face.

[0008] The upper cover of the fan comprises an air inlet matching the arc top of the impeller, an arc inner wall matching the curve of the impeller blade, and a first annular air duct tangent to the outlet of the centrifugal air flow channel of the impeller.

[0009] The fan shell comprises an impeller rotating platform at the top, a second annular air duct tangent to the centrifugal air flow channel, a plurality of annular heat dissipation fins linearly distributed on the outer wall of the fan shell from top to bottom, and a flexible wire protection block detachably clamped to the bottom of the fan shell; the first annular air duct and the second annular air duct constitute an annular air duct with a circular cross section; the flexible wire protection block comprises a main body matching the wall of the fan shell, a clamping groove provided on the top surface of the main body, arc-shaped limiting portions provided on both sides, and a wire hole matching the motor connecting wire; correspondingly, the fan shell is provided with a clamping protrusion matching the clamping groove and an arc-shaped opening matching the arc-shaped limiting portions; the clamping groove and the clamping protrusion are detachably limited and abutted; the arc-shaped limiting portions and the arc-shaped opening are limited and abutted.

[0010] Preferably, the bottom of the impeller is limited and clamped to the shaft shoulder of the central shaft, and the top of the impeller is detachably limited and connected to the top end of the central shaft through a gasket and a nut. The impeller connection structure is simple, reliable, and easy to disassemble and maintain.

[0011] Preferably, the top surface of the fan shell is provided with an annular limiting connection groove at the outside of the second annular air duct, and correspondingly, the bottom surface of the fan upper cover is provided with an annular limiting connection protrusion matching the limiting connection groove at the outside of the first annular air duct; the annular limiting connection groove and the annular limiting connection protrusion are limited and abutted, improving the assembly accuracy and connection reliability between the fan shell and the fan upper cover, enhancing the sealing performance of the air chamber, and improving the air outlet efficiency.

[0012] Preferably, the wire hole comprises a flexible dustproof baffle integrally formed; the flexible dustproof baffle comprises an inner cross-shaped opening, improving the dustproof effect of the motor chamber and prolonging the service life of the motor.

[0013] Compared with the prior art, the novel turbo fan of the present application has the following beneficial effects:

[0014] The utility model discloses a flat type air chamber design, impeller closely rotates the upper and lower wall of air chamber, and the blade top of impeller is equipped with horizontal section air inlet, improves the air intake efficiency, and the inner concave arc surface and fluid type curved surface main part design reduce the loss in the flow process of airflow, effectively reduce fluid noise, and the centrifugal air flow channel export of impeller is tangent to annular air duct, further reduce the flow loss of airflow in air chamber after being compressed by impeller, effectively improve the air outlet efficiency of fan, and simultaneously, there are a plurality of annular cooling fins on the lateral wall outside motor chamber, effectively improve the heat dissipation effect of motor chamber, reduce the damage of equipment due to the insufficient heat dissipation, reduce the operation cost caused by frequent maintenance and repair, and be equipped with the special wire protection block and carry out effective protection to motor connecting wire, and the flexible dustproof baffle improves the dustproof effect of motor chamber, improves the overall service life of turbine fan. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is structure schematic diagram of the utility model embodiment;

[0016] Figure 2 It is structure explosion drawing of the utility model embodiment;

[0017] Figure 3 It is structure explosion drawing of air chamber and motor chamber in the utility model embodiment;

[0018] Figure 4 It is structure schematic diagram of fan shell in the utility model embodiment;

[0019] Figure 5 It is structure schematic diagram of impeller in the utility model embodiment;

[0020] Figure 6 It is structure schematic diagram of another view of impeller in the utility model embodiment;

[0021] Figure 7 It is the connection structure section view of central shaft in the utility model embodiment;

[0022] Figure 8 It is the connection structure section view in the utility model embodiment;

[0023] Figure 9 It is structure schematic diagram of flexible wire protection block in the utility model embodiment;

[0024] Figure 10 It is structure schematic diagram of flexible dustproof baffle in the utility model embodiment.

[0025] Reference numerals: 1. Fan top cover; 11. Air inlet; 12. Arc-shaped inner wall; 13. First annular air duct; 14. Annular limiting connecting protrusion; 2. Fan housing; 21. Impeller rotating platform; 22. Second annular air duct; 23. Annular heat sink; 24. Flexible cable protection block; 241. Main body; 242. Snap-fit ​​groove; 243. Arc-shaped limiting part; 244. Cable routing hole; 245. Flexible dustproof baffle; 2 46. ​​Inner cross opening; 25. Snap-fit ​​protrusion; 26. Arc-shaped opening; 27. Annular air duct; 28. Annular limiting connection groove; 3. Fan bottom cover; 4. Impeller; 41. Blade; 411. Horizontal air inlet surface; 412. Fluid-shaped curved body; 413. Vertical air outlet surface; 42. Centrifugal air flow channel; 43. Concave arc surface; 5. Motor; 51. Central shaft; 6. Gasket; 7. Nut; 8. Bearing. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method:

[0027] Example 1

[0028] like Figures 1-10 As shown in the figure, this embodiment illustrates a novel turbine fan, comprising, from top to bottom, a fan top cover 1, a fan housing 2 threadedly connected to the fan top cover 1, and a fan bottom cover 3 threadedly connected to the fan housing 2; wherein the fan top cover 1 and the fan housing 2 constitute a wind chamber, and a rotatable impeller 4 is housed within the wind chamber; the fan housing 2 and the fan bottom cover 3 constitute a motor chamber 5, and a motor 5 is fixedly installed within the motor chamber 5; the motor 5 includes a central shaft 51 extending through the fan housing 2 into the wind chamber; the impeller 4 is fixed to the top end of the central shaft 51; the motor 5 drives the central shaft 51 to rotate, thereby rotating the impeller 4 fixed to the top end of the central shaft 51. Specifically, the central shaft 51 is connected to the fan housing 2 and the fan bottom cover 3 respectively via bearings 8.

[0029] like Figures 5-6 As shown, in this embodiment, the impeller 4 includes several curved blades 41; the blades 41 are centrifugally spirally distributed around the central axis 51 of the impeller 4; adjacent blades 41 form a centrifugal airflow channel 42 that generates rotating airflow; each blade 41 includes a horizontal air inlet surface 411 at the top, a fluid-shaped curved body 412 in the middle, and a vertical air outlet surface 413 at the tail end, all three being integrally formed and connected; the impeller 4 is a cone that gradually widens from top to bottom, and its concave side is an inwardly concave arc surface 43. Specifically, the impeller 4 in the turbine fan is its core component, and its main function is to convert the input mechanical energy into the kinetic and pressure energy of the gas. When the impeller 4 rotates, the blades 41 push the gas along the centrifugal airflow channel 42, thereby generating a compressed vortex airflow.

[0030] The upper cover 1 of the fan in the embodiment comprises an air inlet 11 matching the arc top of the impeller 4, an arc inner wall 12 matching the curve of the blade 41 of the impeller 4, and a first annular air duct 13 tangent to the outlet of the centrifugal air flow channel 42 of the impeller 4.

[0031] The fan shell 2 in the embodiment comprises an impeller rotating platform 21 at the top, a second annular air duct 22 tangent to the centrifugal air flow channel 42, a plurality of annular heat sinks 23 linearly distributed on the outer wall of the fan shell 2 from top to bottom, and a flexible wire protection block 24 detachably clamped to the bottom of the fan shell 2. The linearly distributed heat sinks effectively improve the heat dissipation effect of the motor 5 chamber, reducing equipment damage caused by insufficient heat dissipation. The first annular air duct 13 and the second annular air duct 22 form an annular air duct 27 with a circular cross section, and the annular air duct 27 is tangent to the outlet of the centrifugal air flow channel 42 of the impeller 4. Specifically, the air chamber in the embodiment is designed in a flat type, the impeller 4 rotates closely to the upper and lower arms of the air chamber, the top of the blade 41 of the impeller 4 is provided with a horizontal air inlet face 411 to improve the air inlet efficiency, the inner concave arc surface 43 and the fluid type curved surface body 412 are designed to reduce the loss in the airflow process and effectively reduce the fluid noise, and the impeller 4 makes the outlet of the centrifugal air flow channel 42 tangent to the annular air duct 27 through the vertical air outlet face 413 of the blade 41, reducing the flow loss of the vortex airflow in the air chamber after being compressed by the impeller 4 and effectively improving the air outlet efficiency of the fan.

[0032] The flexible wire protection block 24 in the embodiment comprises a main body 241 matching the wall of the fan shell 2, a clamping groove 242 provided on the top surface of the main body 241, arc limiting portions 243 provided on both sides, and a wire hole 244 matching the connecting wire of the motor 5. Correspondingly, the fan shell 2 is provided with a clamping protrusion 25 matching the clamping groove 242 and an arc-shaped opening 26 matching the arc limiting portions 243. The clamping groove 242 and the clamping protrusion 25 are detachably limited and abutted, the wire protection block effectively protects the wear of the connecting wire of the motor 5, and is convenient for disassembly and maintenance. The arc limiting portions 243 and the arc-shaped opening 26 are limited and abutted, making the connection between the wire protection block and the fan shell 2 more reliable and compact.

[0033] Embodiment 2

[0034] As shown in Figures 1-10 Another embodiment is shown on the basis of embodiment 1, which further illustrates that, in the further implementable manner of the embodiment, as shown in Figure 2 and Figure 7 The bottom of the impeller 4 is limited and clamped on the shaft shoulder of the central shaft 51, and the top of the impeller 4 is detachably limited and connected to the top end of the central shaft 51 through the gasket 6 and the nut 7. The connection structure of the impeller 4 is simple, reliable, and convenient for disassembly and maintenance.

[0035] Embodiment 3

[0036] As Figures 1-10 shown, another embodiment on the basis of embodiment 1 shows a new type of turbine fan, further illustrates, in the further embodiment of the present embodiment, as Figure 4 and Figures 6-7 shown, the top surface of the fan housing 2 is provided with an annular limiting connection groove 28 at the outside of the second annular air duct 22, and correspondingly, the bottom surface of the fan upper cover 1 is provided with an annular limiting connection protrusion 14 matched with the limiting connection groove at the outside of the first annular air duct 13; the annular limiting connection groove 28 and the annular limiting connection protrusion 14 limit abutment, improve the assembly accuracy and connection reliability between the fan housing 2 and the fan upper cover 1, improve the sealing performance of the air chamber, and improve the air outlet efficiency.

[0037] Embodiment 4

[0038] As Figures 1-10 shown, another embodiment on the basis of embodiment 1 shows a new type of turbine fan, further illustrates, in the further embodiment of the present embodiment, as Figures 8-9 shown, the wiring hole 244 comprises a flexible dustproof baffle 245 integrally formed; the flexible dustproof baffle 245 comprises an inner cross-shaped opening 246, improves the dustproof effect of the motor 5 chamber, and prolongs the service life of the motor 5.

[0039] The above is only an embodiment of the present application, and the well-known specific structure and characteristics in the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A new turbofan characterized by: From top to bottom, it comprises a fan upper cover, a fan shell body threadedly connected with the fan upper cover, and a fan bottom cover threadedly connected with the fan shell body; wherein the fan upper cover and the fan shell body form an air chamber, and a rotatable impeller is built in the air chamber; the fan shell body and the fan bottom cover form a motor chamber, and a motor is fixedly built in the motor chamber; the motor comprises a central shaft extending through the fan shell body into the air chamber; the impeller is fixed to the top end of the central shaft; the motor drives the central shaft to rotate, thereby driving the impeller fixed to the top end of the central shaft to rotate; The impeller comprises a plurality of curved blades; the blades are distributed in a centrifugal spiral around the central axis of the impeller; adjacent blades form a centrifugal air flow channel generating a rotating air flow; the blade comprises a horizontal air inlet face at the top end, a fluid-shaped curved main body at the middle, and a vertical air outlet face at the tail end, which are integrally formed and connected; the impeller is a gradually widened cone from top to bottom, and the tapered edge of the cone is an inwardly recessed arc face; The fan upper cover comprises an air inlet port matched with the arc-shaped top of the impeller, an arc-shaped inner wall matched with the curve of the impeller blade, and a first annular air duct tangent to the outlet of the centrifugal air flow channel of the impeller; The fan shell body comprises an impeller rotation platform at the top, a second annular air duct tangent to the centrifugal air flow channel, a plurality of annular heat dissipation fins linearly distributed on the outer wall of the fan shell body from top to bottom, and a flexible wire protection block detachably clamped to the bottom of the fan shell body; the first annular air duct and the second annular air duct form an annular air duct with a circular cross section; the flexible wire protection block comprises a main body matched with the wall of the fan shell body, a clamping groove provided on the top surface of the main body, arc-shaped limiting portions provided on both sides, and a wire hole matched with the motor connecting wire; correspondingly, the fan shell body is provided with a clamping protrusion matched with the clamping groove and an arc-shaped opening matched with the arc-shaped limiting portion; the clamping groove and the clamping protrusion are detachably limited and abutted; the arc-shaped limiting portion and the arc-shaped opening are limited and abutted.

2. A new turbofan as claimed in claim 1, wherein: The bottom of the impeller is limited and clamped on the shaft shoulder of the central shaft, and the top of the impeller is detachably limited and connected to the top end of the central shaft through a gasket and a nut.

3. A new type of turbofan according to claim 1, characterized in that: The top surface of the fan shell body is provided with an annular limiting connection groove at the outside of the second annular air duct, and correspondingly, the bottom surface of the fan upper cover is provided with an annular limiting connection protrusion matched with the limiting connection groove at the outside of the first annular air duct; the annular limiting connection groove and the annular limiting connection protrusion are limited and abutted.

4. A new type of turbofan according to claim 1, characterized in that: The wire hole comprises an integrally formed flexible dustproof baffle; the flexible dustproof baffle comprises an inner cross-shaped opening.

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