Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of low noise air-conditioning internal machine, this low noise air-conditioning internal machine is possible not only to effectively regulate air-out direction, and has less wind noise.
The technical solution adopted for the present invention to solve the technical problems is: this low noise air-conditioning internal machine includes tubular axial-flow fan, and described axial-flow fan is driven by fan electromotor;Described axial-flow fan is provided externally with opening cylinder coaxial with axial-flow fan, with axial cut-outs, and the air-flow that described axial-flow fan is radially discharged is discharged from the axial cut-outs of described opening cylinder;Described opening cylinder, by steering control system control, makes opening cylinder can rotate around the axis that opening cylinder and axial-flow fan are common.
As preferably, the outside turnup of axial cut-outs of described opening cylinder, formation arc crimping, so that the air-flow that axial-flow fan is discharged flows through sleekly from described axial cut-outs, namely air-flow is not formed sharp keen otch by axial cut-outs.
As preferably, described opening cylinder has mutually coaxial inside and outside two, and these two opening cylinder all can rotate rotating around the axis of axial-flow fan under the control of described steering control system;Thus, when the axial cut-outs of these two opening cylinder is facing each other, the air outlet area formed reaches maximum, and when the axial cut-outs of two opening cylinder staggers mutually, the degree staggered is more big, then air outlet area is more little, it is achieved thereby that the adjustment of air-out range, and this kind of regulatory function is that in traditional air conditioner, machine cannot realize;Further, described steering control system is motor, and described two opening cylinder mate a motor respectively.
As preferably, described steering control system includes: the angular transducer of the corner of measurable described opening cylinder, be fixed on described opening cylinder by the metal end plate of fan motor end, strip permanent magnets that two axis centre about axial-flow fan being fixed on described axial-flow fan are symmetrical;Described permanent magnet axially extends to the two ends of axial-flow fan, and these two permanent magnets just to and different close to the pole polarity of described metal end plate;Described metal end plate coupling has friction plate, has the fixing maximum static friction moment of resistance between described friction plate and metal end plate;Described steering control system also includes a gain module for increasing described fan electromotor electric current;When needing the corner regulating described opening cylinder, the electric current of fan electromotor is increased by described gain module, fan electromotor is made to accelerate, so that the moment of torsion of described metal end plate is increased by described permanent magnet, past the described maximum static friction moment of resistance, so that described opening cylinder rotates, until it reaches eliminate gain current after corner.
The beneficial effects of the present invention is: this low noise air-conditioning internal machine is when outside air-out, described axial-flow fan the air-flow discharged can only be discharged from the axial cut-outs of described opening cylinder, therefore, by regulating the corner of opening cylinder, the adjustment of wind direction can be realized;Regardless of whether what kind of angle is axial cut-outs be rotated in, the lower edges of axial cut-outs is symmetrical all the time for exhaust airstream, is therefore absent from the vibrating noise caused by asymmetry;On the other hand, due to the lower edges not object gas flow all the time of axial cut-outs, therefore axial cut-outs to air-flow substantially without the effect of isolating, so being substantially free of air-flow to tear noise;So that this air-conditioning internal machine remains relatively low wind noise.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described:
In the embodiment one shown in Fig. 1, this low noise air-conditioning internal machine includes tubular axial-flow fan 1, the end of described axial-flow fan 1 has fresh air inlet 10, along axis, there is rotating shaft 11, this axial-flow fan 1 is driven by fan electromotor (in Fig. 1 not shown), when axial-flow fan rotates, air-flow enters inside axial-flow fan from end, and radially discharges;Described axial-flow fan 1 is provided externally with opening cylinder 2 coaxial with axial-flow fan, with axial cut-outs 20, and the air-flow that described axial-flow fan 1 is radially discharged is discharged from the axial cut-outs 20 of described opening cylinder 2;Described opening cylinder 2, by steering control system control, makes opening cylinder 2 can rotate around the axis that opening cylinder 2 and axial-flow fan 1 are common.
It addition, the outside turnup of lower edges of the axial cut-outs 20 of described opening cylinder 2, forming arc crimping 201, so that the air-flow that axial-flow fan 1 is discharged flows through sleekly from described axial cut-outs 20, namely air-flow is not formed sharp keen otch by axial cut-outs 20.
Above-mentioned low noise air-conditioning internal machine is when outside air-out, described axial-flow fan 1 air-flow discharged can only be discharged from the axial cut-outs 20 of described opening cylinder 2, therefore, by regulating the corner of opening cylinder 2, can realize the adjustment of wind direction;Regardless of whether what kind of angle is axial cut-outs 20 be rotated in, the lower edges of axial cut-outs 20 is symmetrical (air-out of axial-flow fan 1 is uniform about its axis circumference) all the time for exhaust airstream, is therefore absent from the vibrating noise caused by asymmetry;On the other hand, due to the lower edges not object gas flow all the time of axial cut-outs 20, therefore axial cut-outs 20 to air-flow substantially without the effect of isolating, so being substantially free of air-flow to tear noise;So that this air-conditioning internal machine remains relatively low wind noise.
For the embodiment two shown in Fig. 2, it is different in that with embodiment one: ' having mutually coaxial inside and outside two, these two opening cylinder 2,2 ' all can rotate rotating around the axis of axial-flow fan 1 described opening cylinder 2,2 under the control of described steering control system;In order to prevent two opening cylinder 2,2 ' the lower edges of axial cut-outs 20,20 ' mutually touch, embodiment two is no longer formed the arc crimping 201 described in embodiment one;Thus, when the axial cut-outs 20,20 of these two opening cylinder is ' time facing each other, the air outlet area formed reaches maximum, and when the axial cut-outs 20,20 of two opening cylinder 2,2 ' is ' when mutually staggering, the degree staggered is more big, then air outlet area is more little, it is achieved thereby that the adjustment of air-out range.As, when axial-flow fan 1 stabilization of speed, its exhaust air rate is basicly stable, and therefore, described air-out area is more little, then air-out range is more remote, then for being in air outlet people farther out, can enjoy directly brushing of hot-fluid or cold flow.For this kind of regulatory function, it is that in traditional air conditioner, machine cannot realize.
It addition, for the above embodiments one, two, described steering control system can select motor;Especially, for embodiment two, described two opening cylinder 2,2 ' can mate a motor respectively.
For the embodiment three shown in Fig. 3, Fig. 4, described steering control system includes: the angular transducer (not shown) of the corner of measurable described opening cylinder 2, be fixed on the described opening cylinder 2 metal end plate 4(such as, aluminium sheet by fan electromotor 3 end), the symmetrical strip permanent magnet of two axis centre about axial-flow fan 1 being fixed on described axial-flow fan 15,5 ';Described permanent magnet 5,5 ' axially extends to the two ends of axial-flow fan 1, and this two permanent magnets 5,5 ' just to and different close to the pole polarity of described metal end plate 4.To this, when these two permanent magnets 5,5 are ' when rotating continuously with axial-flow fan 1, the vortex flow of magnetic pole motion is gone out to follow at described metal end plate 4 surface induction, so that metal end plate 4 forms electromagnetic torque (this principle is essentially identical with machinery electric energy meter) around the axis of opening cylinder 2 under the traction of electromagnetic force, that is, opening cylinder 2 is made to obtain electromagnetic torque.
Described metal end plate 4 coupling has friction plate 6, has the fixing maximum static friction moment of resistance between described friction plate 6 and metal end plate 4;Described steering control system also includes a gain module (not shown) for increasing described fan electromotor 3 electric current;When needing the corner regulating described opening cylinder 2, the electric current of fan electromotor 3 is increased by described gain module, fan electromotor 3 is made to accelerate, so that the moment of torsion of described metal end plate 4 is increased by described permanent magnet 5,5 ', past the described maximum static friction moment of resistance, so that described opening cylinder 2 rotates, until it reaches eliminate gain current after corner.For embodiment three, it is convenient to omit motor, make the structure near the end of axial-flow fan 1 more succinct, be beneficial to structural design;And it is hardly damaged, it is easy to safeguard.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment of making, equivalent replace within the spirit and principles in the present invention, should be included within protection scope of the present invention.