JPH0231536Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a motor fan drive device for a radiator, and more particularly to a motor fan drive device for a radiator that makes the number of rotations or the rotation speed of the fan variable.

(b) Background of the technology Motor fans are generally used in automobiles and the like to enhance the cooling effect of radiators.

Incidentally, the motor fan is driven by a suitable motor means, and power is supplied to the motor means using an on-vehicle battery as a power source.

However, in recent years, there has been a tendency for various electrical components such as car stereos and car coolers to be used from the viewpoint of driving comfort, and this increases the burden on batteries.

For this reason, it is necessary to suppress unnecessary power consumption from the viewpoint of fuel efficiency, and there is a desire for drive control of the motor fan depending on the situation.

(c) Conventional technology and problems Conventionally, radiator motor fan drive devices
For example, the one shown in Japanese Utility Model Application No. 56-29228 and shown in FIG. 1 is known. In this figure, a radiator motor fan (hereinafter simply referred to as "fan") 10
is coupled to the rotating shaft of the motor 12, and among the brushes connected to the armature coil of the motor 12,
One is connected to resistor 14 and the other is connected to battery 1
Connected to the negative side of 6 and connected to ground. resistance 1
4 is connected to the battery 16 via the thermo switch 18.
A thermoswitch 20 is connected to both ends of the resistor 14.

Both thermoswitches 18 and 20 are placed at appropriate positions such as a radiator.
The thermoswitch 20 operates at a relatively low temperature and turns "ON," and the thermoswitch 20 operates at a relatively high temperature and turns "ON."

To explain the operation of the above device, first, when the temperature rises during driving, the thermoswitch 18 is first turned "ON". Therefore, electric power is supplied to the motor 12 from the battery 16 via the resistor 14, and the fan 10 rotates.
In this case, the voltage of the battery 16 is dividedly applied to the resistor 14 and the motor 12, so the rotation speed of the fan 10 is low.

Next, when the temperature further rises, the thermoswitch 20 is turned "ON". Therefore, the voltage of the battery 16 is directly applied to the motor 12, increasing the rotational speed of the fan 10 and improving the cooling effect.

In the conventional fan drive device as described above, unnecessary power consumption occurs due to the resistor 14 when the fan 10 rotates at a low speed, which is undesirable.

Further, as a method for controlling the rotational speed of the fan 10 well without causing such inconvenience, there is a method using chopper means, but if this is done, it may cause pulsation of power to other electrical components,
This has the disadvantage that it causes noise in car stereos and the like.

(d) Purpose of the invention The present invention has been made in view of the above points, and provides a motor fan drive device for a radiator that can control the rotational speed of the fan well and easily without adversely affecting other electrical components or unnecessary power consumption. The purpose is to provide

(E) Structure of the Invention In order to achieve this object, the present invention provides a radiator motor fan drive device that changes the rotational speed of the motor fan in accordance with the engine temperature, the drive device including the temperature detection device and the like. , a control device, and an electric motor, the electric motor has a plurality of rotors that have the same rotating shaft that transmits power to a motor fan and can be independently energized, and the control device detects the detection result of the detection device. Based on this, the connection of the plurality of rotors is changed to series or parallel to change the voltage applied to each rotor.

(f) Embodiments of the invention The present invention will be explained in detail below based on the embodiments shown in FIGS. 2 and 3.

FIG. 2 shows one embodiment of the radiator motor fan drive device according to the present invention, and the third embodiment of the radiator motor fan drive device according to the present invention is shown in FIG.
The figure shows an example of the structure of the mechanical part. 2 and 3, the positive side of the vehicle battery 100 is connected to the thermo switch 10.
2 to the brush 202 of the first armature 200 of the motor M. Also, battery 1
The positive side of 00 is connected to a relay coil 106 via a thermoswitch 104, and this relay coil 106 is connected to the negative side of the battery 100.

The relay coil 106 is a relay switch 108,
Together with 110 and 112, it constitutes a relay device.
When relay coil 106 is not energized, relay switches 108 and 112 are "OFF" and relay switch 110 is "ON". When the relay coil 106 is energized, the relay switches 108 and 112 are "ON", and the relay switch 1 is turned on.
10 is "OFF". Relay switch 108
is connected between the brush 302 of the second armature 300 and the thermo switch 102, and the relay switch 110 is connected between the brush 204 of the armature 200.
and the brush 302 of the armature 300. Further, the relay switch 112 is connected between the brush 204 of the armature 200 and the negative side of the battery 100, that is, the ground, and the brush 304 of the armature 300 is also connected to the ground.

As described above, when the relay coil 106 is not energized, the armature 200 and the armature 3
00 are connected in series and the relay coil 106 is energized, the armature 200 and the armature 300 are connected in parallel.

Thermoswitches 102 and 104 are placed at appropriate locations on the engine or radiator (not shown),
Thermoswitch 102 operates at a relatively low temperature and turns "ON," and thermoswitch 104 operates at a relatively high temperature and turns "ON."

Next, the motor M will be explained in detail. In FIG. 3, a first armature 200 and a second armature 00
are fixed to the same rotating shaft 400,
Each has independent commutators 206 and 306. The armature coils are housed in a plurality of slots formed in the armatures 200 and 300, respectively, like a normal motor, and the ends are connected to the binding wires 208 and 300, respectively.
308, and the commutator 206,3
06 commutator pieces, respectively. Armature 2
Field magnets 210 and 310 made of permanent magnets are arranged and fixed around 00 and 300, respectively, so that the rotation directions are the same.

The commutators 206, 306 have brushes 202, 20.
4, 302, and 304 are in contact with each other, thereby energizing the armature coil. The rotating shaft 400 is attached to the bearing 40 with respect to the casing 402.
4, 406, and a fan 10 is fixed to the end of the rotating shaft 400 on the commutator 206 side. In other words, the motor M has two independent motors connected to the same rotating shaft 4.
00 and is housed in the same casing 402.

Next, the overall operation of the above embodiment will be explained. First, when an automobile or the like is running, when the temperature of the engine rises, the thermoswitch 102 is activated and turned "ON." On the other hand, thermo switch 1
Since 04 is "OFF", relay coil 10
6 is not energized. Therefore, relay switches 108 and 112 are turned "OFF", and relay switch 11 is turned "OFF".
0 is "ON". Therefore, armature 200,3
00 are connected in series, and the voltage of the battery 100, for example 12V, is divided into 6V and applied. So Juan 10 is
Rotates at relatively low speed.

Next, when the temperature of the engine further increases, the thermoswitch 104 is activated and turned "ON", and the relay coil 106 is energized. By this,
Both relay switches 108 and 112 are turned on, and relay switch 110 is turned on.
becomes “OFF”. For this reason, the armature 200,
300 will be connected in parallel to the battery 100, and the voltage of the battery 100 will be directly connected to the armatures 200 and 300 without being divided.
will be applied to each. Therefore, Juan 1
0 rotates at a relatively high speed.

That is, the rotation speed of the fan 10 is changed in response to changes in engine temperature.

It should be noted that the present invention is not limited to the above-described embodiments, and other structures may be used as long as they provide similar effects. For example, the armature, commutator, etc. may be constructed by a print motor. However, the brushes must be provided independently so that serial-to-parallel conversion can be easily performed. Further, the number of rotors is not necessarily limited to two, and the number may be further increased as necessary.

(g) Effects of the invention As explained above, according to the radiator motor fan drive device according to the invention, two sets of rotors such as armatures are provided on one rotating shaft, and are energized separately and independently. Therefore, we decided to perform serial-parallel conversion of the rotor connection, so we could control the rotational speed of the radiator motor fan without adversely affecting other electrical components and without unnecessary power consumption. In addition, even if one rotor breaks down, the fan can continue to rotate by using another rotor, which means that the fan can continue to run. be.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an example of a conventional radiator motor fan drive device, FIG. 2 is a circuit diagram showing an example of a radiator motor fan drive device according to the present invention, and FIG. 3 is a circuit diagram showing an example of a conventional radiator motor fan drive device. FIG. 2 is a partially cross-sectional front view showing a detailed configuration diagram of the motor shown in FIG. 10...Radiator motor fan, 102,
104... Thermo switch, 106... Relay coil, 108, 110, 112... Relay switch, 200, 300... Armature, 202, 20
4,302,304... Brush, 400... Rotating shaft.

Claims (1)

[Scope of utility model registration request] In a radiator motor fan drive device that changes the rotational speed of a motor fan in accordance with the temperature of the engine, the drive device includes the temperature detection device, a control device, and an electric motor, and the electric motor powers the motor fan. The control device has a plurality of rotors that have the same rotation axis that transmits the power and can be independently energized, and the control device changes the connection of the plurality of rotors to series or parallel based on the detection result of the detection device. A motor fan drive device for a radiator, characterized in that the voltage applied to each rotor is changed by changing the voltage applied to each rotor.