JPS58192917A - Rotation control device of cooling fan - Google Patents

Abstract

PURPOSE:To prevent the energy from the loss of the titled device by a method wherein the designated value of the cooling water temperature which controls the on/off of a cooling fan motor is changed correspond to the atmospheric temperature, and the duration of a motor driving of said fan is decreased in winter season which is allowed more sufficient time until the over-heating than the other seasons. CONSTITUTION:A cooling fan motor power source 1 passing through an ignition switch 2 is supplied to the series circuit which is composed of a cooling fan motor 4, a cooling water temperature switch 7 and the change-over contact of a change-over switch 8. Said water temperature switch 7 is composed of a movable contact pin 7D moved up and down by the expansion of a wax 7B, fixed contact pin 7E and 7F which contact with said movable contact pin 7D. Said change-over switch 8 is opened according to the temperature detected by a atmospheric temperature detector 9, and said switch 8 selects said lower side pin 7E in summer, and said upper side pin 7F in winter. Said cooling fan motor 4 is driven when said movable pin 7D contacts with either of said pin 7E or 7F.

Description

[Detailed Description of the Invention] The present invention provides automatic rotation of an electric cooling fan for a radiator.
Regarding the l11 (fund) iI installation. .

What about the radiator that radiates heat from the cooling water of a water-cooled engine? l
#Cooling fans are being installed to compensate for the lack of air flow. This cooling fan is driven by an engine or a motor, but as the IIL speed increases, the amt of the radiator increases, and the amount of air drawn by the cooling fan is not required as much. Therefore, conventionally, rotation control devices have been prepared that adjust the rotation speed of the cooling fan or turn it on/off depending on the temperature of the cooling water.

The first figure shows a conventional electric cooling fan rotation control device.
A cooling fan motor power supply from a power supply 1 through an ignition switch 2 is connected to a cooling fan motor 4 via a cooling water temperature switch 3, which is used to turn on and off the cooling A7 depending on the cooling water temperature. cooling fan motor 4
is directly connected to the cooling fan 6 located at the back of the radiator 5 @I/C and is used as its driving source. Radiator 5 has an engine (
Cooling water (not shown) is sent from the upper inlet 05A,
The cooling water whose heat has been dissipated by the ventilation is returned to the engine side from the lower outlet 5B. The temperature switch 3 is installed in the passageway of the lower outlet 5B of the cooling water, and its characteristics are as shown in FIG. When the motor 4 is operated at a speed lower than sTo, it is turned off and the motor 4 is stopped.

In this conventional M, @VC, the sensitivity @degree T0 of the water temperature switch 3 is set to around 90"C, but since it is fixed to the set value, there are various inconveniences. For example, 7 am 611f
Even if the amount of airflow is the same, the cooling effect changes depending on the outside temperature.In the winter, the outside temperature is low, so the water temperature drops faster in the fan rotation than in the summer. . However, there is a large margin for overheating in the winter when the cooling water temperature rises, and operating the fan at the same set temperature T0 as in the summer results in a wasteful loss of energy.

The present invention has been made in view of the above-mentioned circumstances, and f′
The purpose is to provide a rotation control system that eliminates the conventional filtering point by switching the cooling water temperature setting for cooling fan motor on/off control A depending on the outside temperature.

FIG. 3 is a circuit configuration diagram showing an embodiment of the present invention. The cooling fan motor power supply through the ignition switch 2 is connected to an I-line circuit consisting of the cooling fan motor 4, the cooling water temperature switch 7, and the 8 switching contacts of the relay-configured changeover switch 8.
You can get n. Further, the cooling fan power supply is connected to the operating power supply of the outside temperature detector 9 and the excitation coil 8B of the changeover switch 8.

The water temperature switch 7 is installed with one end of the cylindrical container 7 having electrical conductivity and thermal conductivity protruding into the cooling water outlet pipe 10,
Wax 7B is partitioned and sealed inside with a conductive bellows 7C, and a movable contact bottle 7 is placed in the center of the bellows 7C.
A bottle 7D is provided on the side and other end of the container 7A.
Fixed contact bottle 7, which contacts bottle 7DK by protrusion, is provided with 7F insulated from the seven containers. The container 7A connects the circuit W! to the motor 4 through the terminal 7GK. Continued.

Therefore, the water temperature switch 7 causes the wax 7B in the container 7A to thermally expand due to the cooling water temperature in the cooling water outlet pipe 1G and push up the bellows 7C.
However, the pin 7E and the pin K contact the pin 7F to form an energizing path for the motor 4 through the pin 7E and a γFVC circuit.

The changeover switch 8 is connected to the water temperature switch 7 by the 8 changeover contacts.
The contact bin 7E or 7F is switched and grounded, and the motor 4 is energized W&t binf & or 7. Outside temperature detector 9 to switch to F
The device includes nine bimetal type outside temperature detection switches and a relay 9B that is controlled on and off by the switches 9AKj and forms a coil energizing circuit of the changeover switch 8. When the outside temperature detector 9 is higher than the set temperature of 1 degree, the switch 9 is in the open state as shown and the relay 9B is cut off! IIK L, the contact point 8A of the cut-off switch 8 is set to the state shown in the figure, and the energizing circuit for the motor 4 is formed by the contact between the pins 7 and 7KK. Then, when the outside temperature is lower than the set temperature, the outside temperature detector 9 switches the changeover switch 8 from the illustrated state, and the 1-in-1 circuit of the motor 4 is formed by the contact of the bin 7D with the bin 7F.

Therefore, depending on the outside temperature, the selector switch 8 selects the motor energizing circuit contact point 7E or 7F of the water temperature switch 7, and when the bin 7E is the energizing circuit contact point, the motor 4 is switched to 7 when the cooling water temperature is low. ! ! Started rolling and moved to bin 7F
When using the energizing port S contact, start the motor 4 with the cooling water @ high temperature 1. Let the cooling water temperature at which the water temperature switch off bottle 7D comes into contact with the bottle 7 & be T1, and the water temperature switch 7D should come into contact with the bottle 7F. If the cooling water temperature is T2, the motor 4 rotates 1'4 and stops! As shown in FIG. 4, the jIL characteristic is such that when the outside temperature is high, the motor 4 is switched between running and stopped at a low cooling water temperature T1, and when the outside temperature is low, it is switched at a high cooling water temperature T2. In addition, cooling water @Tt is 80℃~90℃
℃K setting L, water temperature T 2kt 9 o℃~lo o
'18 Wtllc is set, and the operating point of the outside temperature detection Wh9 is set to about 10 to 20 degrees Celsius, so that the engine can be kept in the best operating condition and the power consumption can be reduced by eliminating excessive operation of the fan motor.

In addition, in the embodiment, the outside temperature detector 9. Although a case is shown in which a relay is used as the changeover switch 8, it goes without saying that this can be replaced with another semiconductor switch. In addition, the operating side (end) of the fan sweater is shown as being switched between two levels of cooling water temperature depending on the outside temperature, but this can be configured to three or more levels to make it even more effective. .

As described above, according to the present invention, the operation and
Since the cooling water with the slag as the cutting point is switched by 1 degree depending on the outside temperature, the fan motor's constant operation rate can be reduced and unnecessary energy consumption can be suppressed. In addition, by applying the present invention, the cooling water temperature can be kept high as the outside temperature gets lower, such as in winter, and the cooling water temperature can be increased. The heating effect of the heater used increases.

[Brief explanation of drawings]

@ Figure 1 is a configuration diagram showing a conventional cooling fan rotation control Ii capture device, Figure 2 is a side-turning characteristic diagram of the 7 motor in Figure 1, and Figure 3 is a configuration diagram showing an embodiment of the present invention. The fourth cause is the side-turning characteristic diagram in Figure 83.

Claims (1)

[Claims] Is it running/stopping depending on the temperature of the cold water in the radiator of my 1111fi storm? In the rotating side tilting device for the electric cooling fan, there is a cooling water temperature switch that selects one of the contacts in a + several stages according to the cooling water temperature, and the outside air 11! ? An outside temperature detector detects multiple stages, and each contact point of the cooling water temperature switch is selected according to the detection output of this outside temperature sensor.
9rtdl A rotation side tilting device for a cooling fan, which is equipped with a cut-off switch that forms an energizing path for the fan motor, and operates the cooling fan motor at a cooling water temperature that is higher as the outside temperature is lower.