JPH02204699A - Air blower - Google Patents

Abstract

PURPOSE:To simplify embeddability into equipment as well as to make blower inexpensive in cost by installing a blade cover, whose one side is formed in a duct and the other side is attached to a motor, at the side of an intake air duct, and attaching an inverter controller to this side wall. CONSTITUTION:With ac power inputted, an electric motor 10 is driven via an inverter controller 19, a blade 14 is rotated, performing a blasting action from an intake air course 15 to an exhaust air course 15 by a duct 18, and further operation as a blower is controlled by each control circuit of a pole position detector installed in a rotor of the motor 10 and the inverter controller 19. In this case, a hot air flow 30 out of the inverter controller 19 installed in a side wall 20 of a blade cover 17 in inhaled to the side of the blade 14 by an intake action of the blade 14, forcedly cooling it. Accordingly, forced-air cooling by a separate cooling system or a large-sized heat sink is made into disuse, so that miniaturization as a blower is well promoted, thus product cost can be made so inexpensive.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a blower that is used in, for example, a vacuum cleaner and is driven and controlled by an inverter control device.

[Conventional technology]

FIG. 3 is a diagram showing a conventional blower disclosed in, for example, Japanese Unexamined Patent Publication No. 63-95882. In the figure, (1) is a device in which the blower described later is incorporated, such as a vacuum cleaner. (2 is the suction part of this device, (3) is a filter (4) installed internally facing this suction part, is a discharge part communicating with the above-mentioned suction part (2), (( 5) is a blower, which is composed of blades (6) and a motor port, and forms an air intake and exhaust path. (8) is an inverter control device connected to this blower via a line, and (9) is this inverter control device. The power cord is connected to the

A conventional blower is configured as described above and has a power cord (9
), the power is input through the inverter control device (8)
The blower (5) is operated, and air is blown from the suction part (2) to the discharge part (a) through the filter (0), thereby functioning as a vacuum cleaner.

[Problem to be solved by the invention]

In the conventional blower like the one mentioned above, the inverter control device (
The inverter control device (6) does not have a cooling device, and the inverter control wave R (5
), a problem arises in that a dedicated cooling device must be installed if the heat generated by the

This invention was made to solve the problem,
It is an object of the present invention to provide a blower in which an inverter control device and a blower are integrally configured, which reduces the size of built-in equipment and eliminates the need for a dedicated cooling device for the inverter control device.

[Means for Solving the Problems] In order to achieve the above object, the blower of the present invention includes an inverter control device, an electric motor driven and controlled by the inverter control device, and an inlet air path and an electric motor driven by the electric motor. A vane cover forming an exhaust air passage, one side forming a duct on the intake air passage side, and a vane cover attached to the electric motor on the other side, and the inverter control device is attached to the side wall of the vane cover. It is.

Further, the blade cover is provided with a circuit cover that covers the inverter control device.

Further, the circuit cover is made of metal.

Further, the circuit cover is formed of a resin molded product whose surface is plated with metal.

[Effect]

In this invention, the inverter control device is forcibly cooled by the suction action within the vane cover, and is protected by the circuit cover.

〔Example〕

FIG. 1 is a structural cross-sectional view showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram, in which the motor is an electric motor, for example, a permanent magnet type synchronous motor. (11) is a coil of this motor, (I2) is a rotor of the same motor, and (13) is a magnetic pole position detector for detecting the magnetic pole position of this rotor, which is made of, for example, a Hall IC. (14) is the above electric motor α
[A vane attached to the rotating shaft (not shown) of the electric motor 0
0), the intake air passage (15) and the exhaust air passage (
16). (17) is a blade cover that covers this blade, and is made of aluminum material, for example, and is provided on the intake air passage (15) side so as to face the blade (14), with one side protruding forward from the blade (14). Duct (18)
and the other is attached to the upper distribution motor a,
A wide contact area between the intake air flow and the blade cover is provided.
(19) is the inverter control device installed on the side wall (20) of this blade cover, and (21) is the printed wiring board of this inverter control device, which consists of a diode (22), a transistor (23), an IC, a resistor, etc. Control circuit components are installed.

(24) is a control circuit of the inverter control device (19), which receives a signal from the magnetic pole position detector (13) and controls the base current of the transistor (23) to cause the coil (11) to flow. The current is controlled, ultimately controlling the rotation of the rotor (12) and controlling the input/output state of the blower. (25) is a capacitor for voltage smoothing. (26> is the power cord connected to the printed wiring board (21), (27)
is a lead wire for electrically connecting the electric motor and the inverter control device (19); (28) is a circuit cover made of metal such as iron or copper;
7) The above inverter control wave? li (19), and this inverter control device (19)
In addition, it serves as an electromagnetic noise shield for the inverter control device! (19) is mechanically protected from external forces, and also facilitates the installation of the blower body. (29) is an AC power supply, (30) is a hot air flow, and (31) is a magnetic pole position signal.

In the blower configured as above, an AC power supply (
29) is input, the inverter control device (1
The electric motor 00 is driven through the 9-channel, the blades (14) rotate, and the duct (18) blows air from the intake air path (15) to the exhaust air path (16). Furthermore, electric motor α
The magnetic pole position detector (13) provided on the rotor (I2) of [
) and the control circuit (2) in the inverter control device (19)
4), the operation as a blower is controlled. In this case, the hot air flow (30) from the inverter control device (+9) provided on the side wall (20) of the blade cover (17) is controlled by the blade (14). The air is drawn toward the blade (14) by the suction action and is forcedly cooled. In this way, the inverter control device (19) is attached to the blade cover (17) provided in the intake air path (15).
) and the circuit cover (28) are cooled by the air intake action of the blades (14), thereby eliminating the need for forced air cooling using a separate cooling device or natural air cooling using a large heat sink, allowing for a more compact blower. Product cost becomes cheaper. For example, when the air blowing capacity is improved, the cooling effect can be improved to cope with the amount of heat generated by the inverter control device (19) due to the increase in current flowing through the diode (22) and transistor (23). You can improve your abilities.

Furthermore, since the electric motor α1, the blades (14), and the inverter control device (19) are integrally formed, the structure and operation for incorporating it into a device such as a vacuum cleaner can be simplified.

Although the circuit cover (28) is made of metal in the present invention, the same effects as in the above embodiment can be expected even if a resin molded product whose surface is plated with metal is used.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

In the first aspect, the inverter control device is configured integrally with the blower, making it easy to incorporate it into equipment, and eliminating the need for a dedicated cooling device for the inverter control device, making the blower inexpensive.

In the second aspect, the cooling effect of the inverter control device π can be further enhanced.

In claims 3 and 4, electromagnetic noise of the inverter control device can be shielded.

[Brief explanation of the drawing]

FIG. 1 is a structural sectional view showing an embodiment of the present invention, FIG. 2 is an electric circuit diagram, and FIG. 3 is a structural sectional view showing a conventional blower. In addition, QOI is the electric motor, (14) is the blade, (15) is the intake air path, (16) is the exhaust air path, (18) is the duct, (1
9) is an inverter control device, and (28) is a circuit cover.

Claims (4)

[Claims] (1) An inverter control device, an electric motor driven and controlled by the inverter control device, and blades driven by the electric motor to form an intake air path and an exhaust air path, one of which has a duct on the intake air path side. A blower comprising: a blade cover, the other end of which is attached to the electric motor, and the inverter control device is mounted on a side wall of the blade cover. (2) The blower according to claim 1, wherein the blade cover is provided with a circuit cover that covers the inverter control device. (3) The blower according to claim 2, wherein the circuit cover is made of metal. (4) The blower according to claim 2, wherein the circuit cover is formed of a resin molded product whose surface is plated with metal.