Thin-type blower of heated air

The present utility model relates to air regulation device, more especially, to blower of heated air with thin-type structure.

blower of heated air with the present technology drives the air by the fan to enable the running air to pass through the heating component in the blower, finally to flow out of the blower in hope of raising the air temperature and for the purpose of heating. To achieve the heating effect to some extent, the air speed and the volume of the fan must be up to a set point; in other words, must have a set power, the size of the fan is the decisive factor determining the size of the whole unit of the blower. The existing blower of heated air, even for a minimum compact-type blower of heated air, has at least 10 watts of fan power, over 50 mm of axial size and large size of diameter. The existing blower of heated air uses an AC motor to drive the air to flow (the warm air blower for field use is not included in the type indicated herein). Moreover, the existing blower of heated air uses inner rotor motor with the impellers and the stators separating in the axial direction. Therefore, the axial sizes of the blower are high. Limited by the sizes of the blower, the sizes of this type of warm air blower are very big, the thickness is over 100 mm mostly, plastic and metal materials are consumed a lot, the consumption of the copper line for AC motor is enormous and the power consumption of the motor is very high; the dramatic consumption of the resources restricts the development of the national economy. Furthermore, the large material consumption heightens the manufacturing cost, further brings a heavy burden to customers. On the other, hand, the control performance of the AC motor is poor and the speed variation difficult. Generally, the AC motors for household appliances can only realize three-stage speed regulation; they are difficult to achieve step-free speed regulation. An AC motor uses 220V municipal power and the security cannot be guaranteed, so insulation and safety protection measures must be adopted, thus further increasing the cost.

In the existing technology, there is a small-power thin-type axial fan, wherein its motor is a permanent-magnet outer-rotor type DC brushless motor. It is often used as the cooling blower for computer mainframes and instruments as well as in meters, see FIG. 4. This kind of product smartly enables the inner hole of the radial-inlet impeller, that is, the hub covers up the outer-rotor magnetic ring of the motor directly, and in this way make the axial thickness of the impeller overlap with the axial length of the motor, reducing the axial sizes of the fan. This kind of cooling fan is also driven by flat type AC motor, but this AC motor is low in power presently. The power of the heating component of the warm air blower applying this kind of fan is difficult to be over 1300 W, so the performance is poor and it has been eliminated.

The present utility model aims at providing a thin-type blower of heated air featuring low thickness, smart volume, light weight, low material consumption and low cost through avoiding the defects in the abovementioned existing technology.

To address the technical problems, the present utility model can take the following technical solution:

Design and use a thin-type blower of heated air, comprising a base and a shell installed on the base, and fans, electric component and heating component mounted inside the shell; an air outlet and an air inlet are mounted in front and in rear of the shell; said heating component is situated in said air outlet; said shell appears in flat case form; said fans inside the shell constitute a fan-module including thin-type axial fans, the thin-type axial fan further comprises radial-inlet impeller and thin-type motor, the motor is covered up closely by the hub of the radial-inlet impeller, ensuring the fixed connection between the radial-inlet impeller and the rotation part of the motor.

The said fan-module includes at least two sets of thin-type axial fan electrically in parallel or in series connection, the various thin-type axial fans are distributed on a plane or on two planes and respectively intersecting to form an obtuse angle. To accommodate the needs of personal use, the fan component can also use a thin-type axial fan.

The thin-type axial fans are distributed in a line or matrix.

In the present utility model, the thin-type motor can be an outer-rotor motor or inner-rotor motor: 1. When the thin-type motor is the outer-rotor motor, the hub of the radial-inlet impeller directly covers up the outer rotor of the outer-rotor motor and forms a whole with the same axis. The thin-type motor can be an outer-rotor permanent-magnet brushless DC motor or an outer-rotor AC motor. 2. When the thin-type motor is inner-rotor motor, the hub of the radial-inlet impeller is fixed at the end of the output axis of the inner-rotor motor, and covers up the stator shell of the inner-rotor motor with radial clearance being reserved. The inner-rotor motor is driven by DC or AC power.

As a further improvement of the present utility model, comprising a shell swing mechanism is set inside the base; the swing mechanism comprises a rotation axis fixed at the lower end of the shell, a pinion fixed on the rotation axis in a sleeve way, a speed reduction synchronous motor installed in the base and an centrifugal wheel fixed on the output axis of the motor, and shift fork rack; the shift fork rack comprises rack and shift fork; the centrifugal wheel is situated in the shift fork and the pinion and the rack are joggled.

As another further improvement of the present utility model, comprising a swing lamina-unit and cam sliding block mechanism set in front of the shell; the cam sliding block mechanism includes synchronous motor, centrifugal wheel and sliding block; the centrifugal wheel and the synchronous motor are connected fixedly, sliding groove is opened in the sliding block and the centrifugal wheel is mounted inside the sliding groove and cooperates with it movably; various swing laminas of the swing lamina-unit connect the sliding block in aid of a small pin axis.

Compared with the existing technology, the present utility model has the following favorable effects: 1. The fan component is the core part of the warm air blower; the thickness and magnitude play a decisive role in the entire unit size, weight and material consumption of air regulation device; the present utility model adopts a fan component of at least two thin type axial flow fans connected in parallel or series electrically included, much smaller in axial sizes compared with the single fan is used. In this way, the volume of the warm air blower is of the same specifications, i.e., the same air output lessens substantially, and the weight reduces dramatically; correspondingly, the consumption of plastic and metal materials for the fittings of the product shell has a large reduction, the manufacturing cost of the product is decreased and social resources are saved, thus the national economy has a growth. Meanwhile, the small volume and lightweight unit also reduces expenses for storage and transportation; 2. The present utility model adopts permanent-magnet brushless DC motor, efficiency is increased compared with the existing warm air blower using AC motor, thus reducing power consumption; 3. By adopting permanent-magnet brushless DC motor for the present utility model, a large amount of strategic resources can be saved: the consumption of steel and copper materials for the brushless DC motor has a high reduction comparing with the AC motor; 5. The permanent-magnet brushless DC motor adopted by the present utility model uses DC power supply much lower than the extremely low safety voltage 42V, thus the security of the motor is enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is the structural sketch of side and sectional view through fan axis of positive projection for Embodiment 1 for the thin-type blower of the present utility model;

FIG. 2 is the structural sketch of the front view of positive projection for Embodiment 1 of the thin-type blower;

FIG. 3 the structural sketch of the axial projection for Embodiment 1 of the thin-type blower;

FIG. 4 is the enlarged structural sketch of side and sectional view of the single outer rotor axial flow fan used in Embodiment 1 for the thin-type blower;

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