CN220286035U - Improved semi-open centrifugal impeller and automobile air conditioner fan using same - Google Patents
Improved semi-open centrifugal impeller and automobile air conditioner fan using same Download PDFInfo
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- CN220286035U CN220286035U CN202321689906.XU CN202321689906U CN220286035U CN 220286035 U CN220286035 U CN 220286035U CN 202321689906 U CN202321689906 U CN 202321689906U CN 220286035 U CN220286035 U CN 220286035U
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Abstract
An improved semi-open centrifugal impeller and an automobile air conditioner fan using the same, wherein a group of blades (11) are uniformly arranged around the periphery of a front protrusion structure of a hub (12); the blade (11) is a variable-section arc-shaped twisted blade. A radial flow fan with a semi-open centrifugal impeller is characterized in that a front longitudinal flow dividing plate (4) is vertically arranged on the front side of a front diversion cover (2) of a machine shell, and a rear transverse flow dividing plate (5) is transversely arranged on the rear side of a rear seat (6) of the machine shell. The impeller and the fan are small in appearance body, the internal flow field structure is concise, the axial air inlet and the axial air outlet can reduce the resistance loss of air flow to blades near the wheel cover, the impeller rotation speed is smaller than the radial pressure gradient, the gap leakage is smaller, the impeller structure is beneficial to the development of the internal flow field, the energy loss is reduced, and the fan is high in operation efficiency. The noise of the fan can be reduced, and the air output and the air pressure of the fan are improved; the device is convenient and flexible, is suitable for occasions with space limitation of the automobile fan, and can achieve a double-layer flow layering effect.
Description
Technical Field
The utility model belongs to the technical field of rotor device mounting on a shaft for ventilation by IPC classification F04D, and particularly relates to a structural innovation and improvement technology of a centrifugal impeller device of an automobile air conditioner fan device.
Background
The impeller generally comprises three parts, namely a blade, a front cover plate, a rear cover plate and a hub, wherein the blade forms a flow passage of fluid in the impeller. The impeller is secured to the shaft by a key and nut and rotates with the shaft to transfer the energy of the motor to the fluid to energize the fluid. The impeller can be divided into: closed, open and semi-open types. The closed impeller is divided into a single suction impeller and a double suction impeller according to the suction mode. The radial flow centrifugal pumps are closed backward impellers, and the open and semi-open impellers are applied to mixed flow type and axial flow type pumps or fans. The impeller with only the back cover plate is called a semi-open impeller. The semi-open impeller has efficiency between that of closed impeller and open impeller, and may be used in high speed blower with inducer installed before the impeller.
The centrifugal fan has wide application range, and is a driven fluid machine which can increase the pressure of gas and discharge the gas by means of input mechanical energy.
For example, chinese patent application CN214998428U discloses an impeller and an air conditioner blower for a vehicle, comprising a shroud, a blade and a hub fixedly connected in sequence, such that the blade is located between the shroud and the hub in an axial direction of the hub, the blade is a backward curved blade, and the blade has a forward swept portion; the impeller is applied to an automobile air conditioner.
For another example, chinese patent application CN214998332U discloses an axial-radial flow blower and an air conditioner comprising: the centrifugal impeller comprises a motor, a centrifugal impeller and a shell; the shell comprises a front shell and a rear shell which are connected with each other; the front shell is provided with an air inlet, the rear shell is provided with an air outlet, and the air flow cross section of the air inlet and the air flow cross section of the air outlet are both intersected with the axial direction of the centrifugal impeller; the front shell is arranged opposite to the rear shell, an installation cavity is formed between the front shell and the rear shell, the motor and the centrifugal impeller are installed in the installation cavity, and the motor is in transmission connection with the centrifugal impeller.
Research on an automobile air conditioner fan shows that in the existing automobile air conditioner, blades of a centrifugal fan impeller are formed after arc-shaped axial stretching, but in actual flowing, a flow field structure in the impeller is complex, the traditional impeller is not beneficial to the development of an internal flow field, and certain energy loss can be caused, so that the overall efficiency of the blower is reduced.
Related published patent applications based on this improvement are as follows:
chinese patent application 202110671544.0 discloses a centrifugal fan with a semi-open three-way impeller, comprising a volute having a front side plate and a rear side plate; one end of the current collector is connected with the front side plate, and the other end of the current collector extends into the volute from the front side plate; the impeller assembly is arranged in the volute, and comprises an impeller arranged in the volute and a rotating shaft which is connected with the impeller and driven by a motor; the impeller comprises an impeller rear disc rotatably arranged in the volute, a plurality of blades connected with the impeller rear disc and an impeller front disc positioned on one side of the impeller rear disc close to the front side plate; the blades are positioned between the impeller front disc and the impeller rear disc, and a gap is reserved between the front edges of the blades and the impeller front disc; the impeller front disc is connected with one end of the current collector, which is far away from the front side plate, and the impeller front disc and the current collector are integrally cast or connected in a seamless mode. The utility model reduces the resistance loss of the air flow to the blades near the wheel cover by casting the front disc of the impeller and the current collector integrally, thereby achieving the effect of high rotation speed ratio.
The impeller of traditional centrifugal fan adopts closed structure, and the impeller front shroud closely pastes the blade, has the clearance between with the fan spiral case, and fan high pressure side air can flow back to the low pressure side through this clearance to cause the energy loss of fan, increase the noise of fan, produce the interference to the air inlet flow field of fan, reduce the air outlet volume and the wind pressure of fan, work space is narrow and small moreover, and present traditional centrifugal fan can not satisfy the requirement of high rotational speed, high efficiency.
Disclosure of Invention
Aiming at the problems and the technical requirements, the utility model provides an improved semi-open centrifugal impeller and an automobile air conditioner fan using the impeller, so as to achieve the required research purpose and function in a concise manner.
The improved semi-open centrifugal impeller, namely the semi-open centrifugal impeller, comprises blades, a hub and a top plate. The middle part of the front side of the hub is protruded forwards and is fixed with a top plate; the group of blades are uniformly arranged around the periphery of the front protrusion structure of the hub; the blade is a variable-section arc-shaped twisted blade. The rear side of the hub is recessed in a funnel shape towards the front side. The semi-open centrifugal impeller, i.e. the hub and the top plate, have coaxial central shaft holes.
The semi-open centrifugal impeller is a forward semi-open impeller. The blade comprises a blade root, a blade profile and a blade tip; the blade is fixed on the front side surface of the hub through a blade root; the front end of the blade root is fixed on the outer edge of the top plate, and the rear end of the blade root is fixed on the outer edge of the front side surface of the hub; the middle region of the blade, i.e. the blade profile, is curved in a circular arc shape, and the blade tip, i.e. the outer edge of the blade profile, extends in a curved manner relative to the blade root. Inlet angle gamma of blade 1 =90°; outlet angle gamma of blade 2 =25 to 35 °; inlet mounting angle beta of blade 1 =56° to 64 °; outlet mounting angle beta of blade 2 =115° to 125 °; blade from inlet mounting angle beta 1 To outlet mounting angle beta 2 Gradually decreasing the slope of the change: the load increases and then decreases in the axial direction from the blade inlet to the blade outlet: the flow area of the airflow channel of the blade is gradually increased from the inlet to the outlet, the inlet flow area S1 and the outlet flow area S2; s2/s1=1.05 to 1.1.
The said; the number of blades is designed to be prime.
The utility model provides the following technical scheme for realizing the purposes:
by adopting the technical proposal, in particular,
the utility model is further provided with: an axial-radial flow fan employing such an improved semi-open centrifugal impeller, the mounting means comprising: the centrifugal impeller comprises a semi-open centrifugal impeller, a shell front air guide sleeve, a motor and a shell rear seat; the front side outer cover of the semi-open centrifugal impeller is provided with a front shell guide cover, the middle part of the rear side of the semi-open centrifugal impeller is coaxially provided with a motor, the rear side of the motor is provided with a rear shell seat, the front side periphery of the rear shell seat is tightly embedded with the rear side periphery of the front shell guide cover, and a gap of 3-6 mm is formed between the curved surface of the inner wall of the front shell guide cover and the blade tips of the blades in a profiling fit mode. The rear seat of the shell is provided with a diversion and ventilation fence structure around the central shaft, and the diversion and ventilation fence structure comprises a converging annular groove at the outer edge of the front side and a centripetally-extending fence rear cover connected with the ventilation inner wall of the converging annular groove.
By adopting the technical scheme, in particular, further, the front longitudinal flow distribution plate is vertically arranged at the front side of the front air guide sleeve of the machine shell, and the rear transverse flow distribution plate is transversely arranged at the rear side of the rear seat of the machine shell. A laminar effect of the air flow, i.e. a bi-laminar flow, can be achieved.
Compared with the prior art, the utility model has the beneficial effects that: the impeller and the fan are small in appearance body, simple and reasonable in structure, the internal flow field structure is concise, axial air inlet and axial air outlet are realized, high-pressure side air cannot flow back to the low-pressure side when the fan operates, resistance loss of air flow to blades near the impeller cover can be reduced, the impeller rotation speed is smaller than that of high-radial pressure gradient, gap leakage is smaller, the impeller structure is beneficial to the development of the internal flow field, energy loss is reduced, and the fan operation efficiency is high. The noise of the fan can be reduced, and the air output and the air pressure of the fan are improved; the device is convenient and flexible, is suitable for occasions with space limitation of the automobile fan, and can achieve a double-layer flow layering effect.
Drawings
The features and advantages of the present utility model will be more clearly understood by reference to the accompanying drawings, which are schematic and should not be interpreted as limiting the utility model in any way.
Fig. 1 is a schematic diagram of an axial structure of embodiment 1 of the present utility model.
Fig. 2 is a schematic axial front view of embodiment 1 of the present utility model.
Fig. 3 is a schematic front view of embodiment 1 of the present utility model.
Fig. 4 is a schematic cross-sectional view of a junction according to embodiment 1 of the present utility model.
Fig. 5 is a schematic diagram showing the radial pressure variation of the simulated impeller in example 1 of the present utility model.
FIG. 6 is a velocity vector diagram of a simulated impeller flowpath cross-section in example 1 of the present utility model.
Fig. 7 is a schematic sectional view of the embodiment 1 of the present utility model after the housing is installed.
FIG. 8 is a graph showing the distribution of pressure at each section of the fan after the housing is installed in example 1 of the present utility model.
Fig. 9 is a schematic diagram of a structure of a splitter plate before and after installation of a fan in embodiment 1 of the present utility model.
Fig. 10 is a schematic view of the airflow rotation pattern from the inlet to the outlet of the impeller of fig. 9.
The reference numerals include:
a semi-open centrifugal impeller 1, a shell front air guide sleeve 2, a motor 3, a front longitudinal flow dividing plate 4, a rear transverse flow dividing plate 5, a shell rear seat 6 and a driving shaft 7; blade 11, hub 12, top plate 13; a converging ring groove 601 and a fence rear cover 602; blade root 1101, blade profile 1102, blade tip 1103;
inlet mounting angle beta 1 Outlet mounting angle beta 2 Inlet angle gamma 1 Outlet angle gamma 2 ；
Fan inlet IN and fan outlet OUT.
Detailed Description
The utility model is further described below with reference to the drawings and examples.
Although embodiments of the present utility model have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the utility model, and such modifications and variations fall within the scope of the utility model as defined by the appended claims.
Example 1: the improved semi-open centrifugal impeller 1, namely the semi-open centrifugal impeller, comprises blades 11, a hub 12 and a top plate 13. As shown in fig. 1, 2, 3 and 4, a top plate 13 is protruded and fixed at the middle of the front side of the hub 12; the group of blades 11 are uniformly arranged around the periphery of the front protrusion structure of the hub 12; the blade 11 is a variable-section circular arc-shaped twisted blade. The rear side of the hub 12 is recessed in a funnel shape toward the front side. The semi-open centrifugal impeller 1, i.e. the hub 12 and the top plate 13, have coaxial central shaft holes.
The semi-open centrifugal impeller 1 is a forward semi-open impeller. The semi-open impeller has the advantages of small manufacturing difficulty, low cost, easy maintenance and cleaning and strong adaptability.
Wherein the blade 11 comprises a blade root 1101, a blade profile 1102 and a blade tip 1103; the blade 11 is fixed to the front side of the hub 12 by a blade root 1101; the front end of the blade root 1101 is fixed on the outer edge of the top plate 13, and the rear end of the blade root 1101 is fixed on the outer edge of the front side of the hub 12; the central region of the blade 11, i.e. the airfoil 1102, is curved in a circular arc shape and, correspondingly, the blade tip 1103, i.e. the airfoil 1102, is curved in a stretched outer edge with respect to the blade root 1101.
In the foregoing, the semi-open centrifugal impeller 1 forms an air flow channel between the outer wall of the hub 12 and the adjacent two blades 11 for air flow. The semi-open centrifugal impeller 1 forms a fan air inlet surface IN at the front side, namely the inlet of an air channel around the top plate 13, and forms a fan air outlet surface OUT at the outer edge of the hub 12, namely the outlet of the air channel; the air flow enters the air flow channel from the air inlet surface IN of the fan, moves along the air flow channel to leave the air flow channel and is output from the air outlet surface OUT of the fan.
Preferably, the inlet angle γ of the blade 11 1 =90°; outlet angle gamma of blade 11 2 =25 to 35 °; inlet mounting angle beta of blade 11 1 =56° to 64 °; outlet mounting angle beta of blade 11 2 =115° to 125 °; the blade 11 is mounted from the inlet angle beta 1 To outlet mounting angle beta 2 Gradually decreasing the slope of the change: the load increases and decreases in the axial direction from the inlet of the vane 11 to the outlet of the vane 11: the flow area of the air flow channel of the vane 11 is increased fromThe inlet to outlet flow area S1, the outlet flow area S2; s2/s1=1.05 to 1.1.
Preferably, the radius of the top plate 13 is Rh, and the radius from the inlet, namely the front end of the blade tip 1103 of the blade 11 to the central axis of the top plate 13 is Rs, so that Rh/Rs is more than or equal to 0.4 and less than or equal to 0.5; the radius from the rear end of the blade tip 1103 of the blade 11 at the outlet to the central axis of the semi-open centrifugal impeller 1 or the top plate 13 is R 2 ，100mm≤R 2 Less than or equal to 105mm; the width B of the edge of the outlet of the blade 11 is more than or equal to 20mm and less than or equal to 22mm; thickness delta of blade 11 at inlet 1 =0.8 mm to 1.5mm; thickness delta of blade 11 at outlet 1 =1.3 mm to 2.5mm; the axial length L of the blade 11 is more than or equal to 53mm and less than or equal to 55mm. The number of blades 11 is 13 or 17. The number of blades 11 is designed to be prime, which effectively reduces fan order noise.
Wherein the inlet mounting angle beta of the blade 11 1 Refers to an included angle between a tangent line of an airfoil line of the blade 11 at the inlet and the circumferential direction; the outlet mounting angle of the blade 11 refers to the angle between the tangent line of the phalangeal line at the water outlet side and the circumferential direction.
In the embodiment of the utility model, the radial pressure gradient change of the semi-open centrifugal impeller 1 is smaller, the gap leakage is smaller, and the fan efficiency is higher. The radial pressure of the simulation impeller is shown in figure 5, the pressure change is uniform, the gradient of the change is small, and the impeller efficiency is high. In addition, the radial gap leakage airflow of the semi-open centrifugal impeller 1 dynamically analyzes the influence of gaps between the blade tip and the flow guiding cover on the pressure rise of the fan, and referring to fig. 6, the speed vector arrows are all along the direction from the impeller inlet to the impeller outlet, so that the problem of leakage of the semi-open impeller is solved. The flow of the air outlet air flow of the fan is smooth, stable and uniform.
Example 2: as shown in fig. 7, further, the improved semi-open centrifugal impeller of the present utility model is applied to an air conditioner fan of an automobile, namely, an axial-radial fan provided with the semi-open centrifugal impeller 1, and the installation parts comprise: a semi-open centrifugal impeller 1, a shell front air guide sleeve 2, a motor 3 and a shell rear seat 6; the front side outer cover of the semi-open centrifugal impeller 1 is provided with a casing front air guide sleeve 2, the middle part of the rear side of the semi-open centrifugal impeller 1 is coaxially provided with a motor 3, the rear side of the motor 3 is provided with a casing rear seat 6, the front side periphery of the casing rear seat 6 is tightly embedded with the rear side periphery of the casing front air guide sleeve 2, and the curved surface of the inner wall of the casing front air guide sleeve 2 is fitted with the blade tips 1103 of the blades 11 in a profiling way and is provided with a gap of 3-6 mm.
In the foregoing, the rear chassis 6 is provided with a flow-guiding and ventilation fence structure around the central axis, the flow-guiding and ventilation fence structure includes a converging annular groove 601 at the outer edge of the front side, and a centripetally extending fence rear cover 602 connected to the ventilation inner wall of the converging annular groove. The air flow entering the semi-open centrifugal impeller 1 from the air inlet surface IN of the fan is outwards rotated along a channel, is guided and converged into the rear seat 6 of the shell, and is surrounded by a central shaft to form a guide and ventilation fence structure, the guide and ventilation fence structure comprises a converging annular groove 601 at the outer edge of the front side, and then the air flow passes through the ventilation inner wall of the converging annular groove 601, enters the fence rear cover 602 of the rear seat 6 of the shell, and is output by the air outlet surface OUT of the fan.
Preferably, the semi-open centrifugal impeller 1 is designed at a rotating speed of 3000-3800 RPM, the flow rate of 450-680 CMH and the rotating angle of air flow from an inlet to an outlet of 60-90 degrees.
In the embodiment of the utility model, the gap between the blade tips 1103 on the tops of the blades 11 of the semi-open centrifugal impeller 1 and the circular arc guide surface on the inner wall of the front air guide sleeve 2 of the casing can avoid scraping when the semi-open centrifugal impeller 1 rotates. However, if the gap is too large, the working efficiency of the air conditioner fan of the automobile is reduced; and too small a gap causes vibration and noise.
In the embodiment of the utility model, the pressure head of the semi-open centrifugal impeller 1 of the automobile air conditioner fan is in direct proportion to the square of the rotating speed of the motor 3. The gap between the top of the centrifugal impeller blade and the circular arc flow guiding part of the fan shell can not influence the pressure head of the fan. As shown in fig. 8, the inlet area constant flow Q counts the pressure rise P of the 6 sections through which the airflow passes, and as a result of analysis, the clearance between the front dome 2 of the casing and the tips 1103 of the blades 11 has small leakage, and has small influence on the air volume and the wind pressure. The outlet pressure of the fan is called as a pressure head, the pressure head is high, the outlet pressure of the fan is high, the kinetic energy of the outlet gas is high, and the corresponding air quantity is also high.
In the embodiment of the utility model, a semi-open centrifugal impeller 1 is fixedly connected with a motor 3 through a driving shaft 7; further, the driving shaft 7 is also fixed in axial position by a sleeve and a lock nut of the semi-open centrifugal impeller 1. After the semi-open centrifugal impeller 1 adopts the axial positioning of the lock nut and the shaft sleeve, the lock nut is prevented from being buckled.
Example 3: as shown in fig. 9, a front longitudinal flow dividing plate 4 is vertically installed on the front side of the front air guide sleeve 2 of the machine shell, and a rear transverse flow dividing plate 5 is transversely installed on the rear side of the rear seat 6 of the machine shell. The upper and lower edges of the rear side of the front longitudinal splitter plate 4 are respectively fixed on the upper and lower edges of the front air guide sleeve 2 of the machine shell, and the middle edge of the rear side of the front longitudinal splitter plate 4 is fixed on the top plate 13; correspondingly, the front side edge of the rear transverse flow dividing plate 5 is fixedly arranged in the middle of the rear end face of the rear seat 6 of the machine shell. The front longitudinal flow dividing plate 4 longitudinally separates air inlet from the inlet of the fan, and the rear transverse flow dividing plate 5 transversely separates air outlet of the fan, so that the air flow layering effect, namely double-layer flow, can be realized.
IN the embodiment of the utility model, the baffle plates are respectively arranged on the air inlet surface IN and the air outlet surface OUT of the fan, and the flow field inside the impeller is simulated and analyzed, as shown IN figure 10, the angular displacement of the air flow from the inlet to the outlet of the impeller is close to 90 degrees, so that the layering effect is realized, and the method is more suitable for being applied to a double-layer flow air conditioner box. The air flow from the impeller inlet to the impeller outlet rotates, the gap leakage between the front air guide sleeve of the shell and the blade tips of the blades is small, and the influence on the air quantity and the wind pressure is small.
In this embodiment, the working process of the automotive air conditioning fan, i.e. the semi-open centrifugal impeller 1:
when the motor 3 is started, the driving shaft 7 drives the semi-open centrifugal impeller 1 to rotate at a high speed to generate centrifugal force, and the air flow radially moves from the center of the semi-open centrifugal impeller 1 to the periphery under the action of inertial centrifugal force, so that the pressure is increased, the flow speed is increased, and the air flows into the rear seat 6 of the machine shell at a high speed (15-25 m/s). In the fence back cover 602 of the chassis back seat 6, due to the continuous expansion of the flow channel, the flow speed of the air flow is controllably slowed down, so that most of kinetic energy is converted into pressure energy, and finally the air flow is discharged from the air outlet face OUT of the fan at a higher static pressure.
In the description of the present application, it should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected.
The above embodiments are further detailed descriptions of the technical solutions of the present utility model, and the present utility model is not limited thereto. In the technical field of the present utility model, several simple deduction or substitution technical schemes are made, which may belong to the protection scope defined by the claims submitted by the present utility model.
Claims (10)
1. An improved semi-open centrifugal impeller, namely a semi-open centrifugal impeller (1), comprises blades (11), a hub (12) and a top plate (13); the novel wheel hub is characterized in that the middle part of the front side of the wheel hub (12) is protruded forwards and is fixedly provided with a top plate (13); the group of blades (11) are uniformly arranged around the periphery of the front protrusion structure of the hub (12); the blade (11) comprises a blade root (1101), a blade profile (1102) and a blade tip (1103); the blade (11) is a variable-section arc-shaped twisted blade.
2. The improved semi-open centrifugal impeller according to claim 1, characterized in that the semi-open centrifugal impeller (1) is a forward semi-open impeller.
3. The improved semi-open centrifugal impeller according to claim 1, wherein the rear side of the hub (12) is recessed in a funnel shape towards the front side.
4. An improved semi-open centrifugal impeller according to claim 1, characterized in that the semi-open centrifugal impeller (1), i.e. the hub (12) and the top plate (13), have coaxial intermediate shaft holes.
5. The improved semi-open centrifugal impeller according to claim 1, wherein the blades (11) are fixed to the front side of the hub (12) by blade roots (1101); the front end of the blade root (1101) is fixed on the outer edge of the top plate (13), and the rear end of the blade root (1101) is fixed on the outer edge of the front side surface of the hub (12); the central region of the blade (11), i.e. the blade profile (1102), is curved in a circular arc shape, and correspondingly, the blade tip (1103), i.e. the blade profile (1102), is curved and stretched along the outer edge relative to the blade root (1101).
6. Improved semi-open centrifugal impeller according to claim 1, characterized in that the inlet angle γ of the blades (11) 1 =90°; outlet angle gamma of blade (11) 2 =25 to 35 °; inlet mounting angle beta of blade (11) 1 =56° to 64 °; outlet mounting angle beta of blade (11) 2 =115° to 125 °; the blade (11) is mounted from the inlet angle beta 1 To outlet mounting angle beta 2 Gradually decreasing the slope of the change: the load increases and then decreases in the axial direction from the inlet of the blade (11) to the outlet of the blade (11): the flow area of the airflow channel of the blade (11) gradually increases from the inlet to the outlet, the inlet flow area S1 and the outlet flow area S2; s2/s1=1.05 to 1.1.
7. Improved semi-open centrifugal impeller according to claim 1, characterized in that the number of blades (11) is designed as prime.
8. An axial-radial flow fan employing such an improved semi-open centrifugal impeller, wherein the mounting means comprises: a semi-open centrifugal impeller (1), a shell front air guide sleeve (2), a motor (3) and a shell rear seat (6); the front side outer cover of the semi-open centrifugal impeller (1) is provided with a casing front guide cover (2), the middle part of the rear side of the semi-open centrifugal impeller (1) is coaxially provided with a motor (3), the rear side of the motor (3) is provided with a casing rear seat (6), the front side periphery of the casing rear seat (6) is tightly embedded with the rear side periphery of the casing front guide cover (2), and the curved surface of the inner wall of the casing front guide cover (2) is fitted with the blade tips (1103) of the blades (11) in a profiling way and is provided with a gap of 3-6 mm.
9. The axial-radial fan using such improved semi-open centrifugal impeller according to claim 8, wherein the casing rear seat (6) is provided with a flow-guiding and ventilation fence structure around the central axis, the flow-guiding and ventilation fence structure including a converging annular groove (601) at the front outer edge, and a centripetally extending fence rear cover (602) connected to the ventilation inner wall of the converging annular groove.
10. The axial-radial flow fan using the improved semi-open centrifugal impeller according to claim 8, wherein the front longitudinal flow dividing plate (4) is vertically installed at the front side of the front air guide sleeve (2) of the casing, and the rear transverse flow dividing plate (5) is transversely installed at the rear side of the rear seat (6) of the casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321689906.XU CN220286035U (en) | 2023-06-30 | 2023-06-30 | Improved semi-open centrifugal impeller and automobile air conditioner fan using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321689906.XU CN220286035U (en) | 2023-06-30 | 2023-06-30 | Improved semi-open centrifugal impeller and automobile air conditioner fan using same |
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| Publication Number | Publication Date |
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| CN220286035U true CN220286035U (en) | 2024-01-02 |
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|---|---|---|---|
| CN202321689906.XU Active CN220286035U (en) | 2023-06-30 | 2023-06-30 | Improved semi-open centrifugal impeller and automobile air conditioner fan using same |
Country Status (1)
| Country | Link |
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| CN (1) | CN220286035U (en) |
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2023
- 2023-06-30 CN CN202321689906.XU patent/CN220286035U/en active Active
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