CN208474195U - A kind of exhaust fan air duct - Google Patents

Abstract

The utility model relates to a kind of exhaust fan air ducts, shell including a under shed, shell side is equipped with air outlet, and shell upper end is equipped with the relief hole to connect driving motor, is additionally provided on the inside of shell upper end to prevent the recessing groove interfered with wind wheel, the baffle to limit air-flow direction；Pass through the setting of recessing groove, wind wheel and shell is avoided to interfere while the upper surface of wind wheel can farthest be reduced at a distance from the inner upper end face of air duct, cooperate the setting of baffle, dead zone and the turbulent flow of air flowing can be reduced, meet hydrodynamics, keep the operation of exhaust fan and air velocity flow more stable, improves the service life of exhaust fan.

Description

A kind of exhaust fan air duct

Technical field

The utility model relates to exhaust fan technical field, especially a kind of exhaust fan air duct.

Background technique

Exhaust fan is called effluent air blower, centrifugal blower, small blast fan, is a kind of air blowing or dual-purpose general of air-breathing Gas source, is usually used for the air-breathing of mechanical equipment, exhaust fan in field of household appliances with relatively broad, such as range hood, sky Tune, heater etc..Exhaust fan is usually assembled by driving motor, wind wheel, air duct, and driving motor is mounted on above air duct, wind Wheel is equipped with relief hole in the junction of driving motor and wind wheel above air duct in air duct；Driving motor drives in air duct Wind wheel rotation, the air being located at below air duct is sucked from the air inlet in air duct, and is discharged by the air outlet of air duct side The air of sucking, just to realize exhausting function.

The upper surface of wind wheel is larger at a distance from the inner upper end face of air duct in existing exhaust fan, and air can be in the space Turbulent flow causes resistance to exhaust fan, influences air suction efficiency；Also there is the upper surface for shortening wind wheel at a distance from the inner upper end face of air duct Way, still, wind wheel is easy to encounter the air duct inner upper end face in air duct, breaks wind wheel, increases noise decibel, flowed fluctuation Greatly, service life reduces；Air that exhaust fan is extracted weight lower section is pumped into, and is flowed out from side, and most air is from wind wheel Middle lower end side outflow, the air capacity for reaching top is less, causes upper air flow velocity and the current difference of middle and lower part away from larger, appearance It is also easy to produce turbulent flow.

Utility model content

In order to solve the above-mentioned technical problem, the utility model provides a kind of exhaust fan air duct, can farthest reduce It avoids wind wheel and shell to interfere while the upper surface of wind wheel is at a distance from the inner upper end face of air duct, reduces the dead zone of air flowing With turbulent flow, the service life of exhaust fan is improved.

A kind of exhaust fan air duct of the utility model, the shell including a under shed, the shell side are equipped with air outlet, The shell upper end is equipped with to the relief hole that connects driving motor, is additionally provided on the inside of the shell upper end to prevent and wind wheel The recessing groove of interference, the baffle to limit air-flow direction.

Preferably, the relief hole is round hole, and the recessing groove is close to resigning bore edges and is circlewise arranged.

Preferably, the recessing groove is arc groove.

Preferably, the baffle is arranged around recessing groove outer circumference, and the baffle interrupts at air outlet.

Preferably, the baffle lower end surface is lower than upper surface 15-20mm in shell.

Preferably, the shell upper surface is equipped with the mounting hole to install driving motor, and the housing side lower part is also Equipped with to fixed mounting post.

Implement the utility model, has the following beneficial effects:

By the setting of recessing groove, the upper surface of wind wheel can be farthest reduced at a distance from the inner upper end face of air duct While avoid wind wheel and shell from interfering, cooperate the setting of baffle, dead zone and the turbulent flow of air flowing can be reduced, meet fluid Mechanics keeps the operation of exhaust fan and air velocity flow more stable, improves the service life of exhaust fan.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model embodiment；

Fig. 2 is another viewing angle constructions schematic diagram of the utility model embodiment；

Fig. 3 is the bottom view of the utility model embodiment；

Fig. 4 is the cross-sectional view of the utility model embodiment；

Fig. 5 is that the amplification in Fig. 4 at A attempts；

Fig. 6 is air duct and wheel combination schematic diagram in the utility model embodiment；

Fig. 7 is air duct and wheel combination cross-sectional view in the utility model embodiment.

In figure: 1, shell；2, air outlet；3, relief hole；4, recessing groove；5, baffle；6, mounting hole；7, mounting post；8, wind Wheel.

Specific embodiment

With reference to the accompanying drawing and specific embodiment, the utility model will be further described, in order to clearer reason Solve the technical idea of the requires of the utility model protection.Only this state, the utility model occur in the text or will occur it is upper, Under, left, right, front and rear, the orientation word such as inside and outside be not practical new to this only on the basis of the attached drawing of the utility model The specific restriction of type.

One of the embodiments of the present invention exhaust fan air duct, as shown in figs. 1-7, the shell including a under shed 1,1 side of shell is equipped with air outlet 2, and 1 upper end of shell is equipped with the relief hole 3 to connect driving motor, goes back on the inside of 1 upper end of shell Equipped with to prevent the recessing groove 4 interfered with wind wheel 8, the baffle 5 to limit air-flow direction；Relief hole 3 is round hole, Recessing groove 4 is close to 3 edge of relief hole and is circlewise arranged, and recessing groove 4 is arc groove, and relief hole 3 can be made using round setting The output shaft of driving motor has enough spaces to connect with wind wheel 8, cooperates recessing groove 4, can farthest reduce wind wheel 8 Upper surface avoids wind wheel 8 and shell 1 from interfering simultaneously at a distance from the inner upper end face of air duct, and recessing groove 4 is arranged to arc groove, Meet hydrodynamics, reduce the dead zone of air flowing, reduce the generation of turbulent flow, reduce the impact to wind wheel 8, reduces noise Decibel；Baffle 5 is arranged around 4 outer circumference of recessing groove, and baffle 5 interrupts at air outlet 2, and 5 lower end surface of baffle is lower than shell 1 Interior upper surface 15-20mm is mentioned by increasing a baffle 5 newly on the outside of recessing groove 4 to reduce the activity space of air High 8 upper air flow velocity of wind wheel reduces the gap of wind wheel 8 upper air flow velocity and middle and lower part air velocity, is further reduced disorderly The generation of flow phenomenon keeps the operation of exhaust fan and air velocity flow more stable, improves the service life of exhaust fan.

More specifically, as shown in Figure 1,1 upper surface of shell is equipped with the mounting hole 6 to install driving motor, 1 side of shell Lower part is additionally provided with to fixed mounting post 7；Motor can be made to be fixed on shell 1 by mounting hole 6, shell 1 is made to have branch The effect of support；The setting of mounting post 7 can be such that shell 1 is installed on the cabinet or deckboard with air inlet, and assembly and disassembly are simple, Versatility is high.

Specific installation steps are as follows: driving motor is mounted on shell 1 by mounting hole 6, and wind wheel 8 enters below shell 1 Shell 1 and output axis connection with driving motor, are installed to air inlet finally by the mounting post 7 of 1 side lower of shell.

The above are only specific embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in Other related technical areas are also included in the patent protection scope of the utility model.

Claims (6)

1. a kind of exhaust fan air duct, it is characterised in that: the shell (1) including a under shed, shell (1) side are equipped with outlet air Mouth (2), shell (1) upper end are equipped with the relief hole (3) to connect driving motor, also set on the inside of shell (1) upper end It is useful with prevent with wind wheel (8) interference recessing groove (4), the baffle (5) to limit air-flow direction.

2. a kind of exhaust fan air duct as described in claim 1, it is characterised in that: the relief hole (3) is round hole, described to allow Position slot (4) is close to relief hole (3) edge and is circlewise arranged.

3. a kind of exhaust fan air duct as claimed in claim 2, it is characterised in that: the recessing groove (4) is arc groove.

4. a kind of exhaust fan air duct as claimed in claim 2, it is characterised in that: the baffle (5) circle on the outside of recessing groove (4) Week setting, and the baffle (5) interrupts at air outlet (2).

5. a kind of exhaust fan air duct as claimed in claim 4, it is characterised in that: baffle (5) lower end surface is lower than shell (1) Interior upper surface 15-20mm.

6. a kind of exhaust fan air duct as described in claim 1, it is characterised in that: shell (1) upper surface is equipped with to pacify The mounting hole (6) of driving motor is filled, shell (1) side lower is additionally provided with to fixed mounting post (7).