JPH0630495Y2 - Control mechanism of air conditioning blower fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a control mechanism for an air conditioning blower fan, which is mainly applied to vehicles such as automobiles.

[Background of the Invention] In vehicles such as automobiles, along with the recent increase in output of engines, it is necessary to increase the output of radiator motor fans. However, increasing the output of the radiator motor fan will increase the power load on the battery, and there is concern that the battery will run out.

[Conventional technology]

Conventionally, a radiator motor fan has been designed to be operated via a relay by turning on a water temperature switch when the water temperature of engine cooling water exceeds a predetermined temperature. Further, the air conditioning blower fan is operated separately from the fan by adjusting the speed with a speed adjusting switch and a resistor.

[Problems to be solved by the device]

However, in the above conventional configuration, even if the radiator motor fan operates, the air conditioning blower fan maintains the speed specified by the speed adjustment switch, and therefore the power supply load of the battery becomes large as much as the radiator motor fan operates, causing the battery to run out. It was in an easy state.

[Means for Solving the Problems]

The present invention, as means for solving the above-mentioned conventional problems,
Water temperature switch for engine cooling water (2) and the water temperature switch
A radiator motor fan (1), an air conditioning blower fan (5), and a speed control switch (6) for the air conditioning blower fan (5), which are activated by the ON-OFF operation of (2). The air conditioning blower fan (5) The speed adjustment switch (6) is provided with a plurality of contacts (61), (62), (63), (64) corresponding to the specified speeds and connectable to the power supply (17). The contacts other than the highest speed contact (64) and the lowest speed contact (61) of the speed adjustment switch (6) and the air conditioning blower fan (5) are intervened by resistors and switches having resistance values corresponding to the specified speed of each contact. Connected by the specified speed circuit, the lowest speed contact (61) and the air conditioning blower fan (5) are connected by the specified speed circuit (8) with a resistance having the maximum resistance value, and the highest speed contact (64) and the air conditioning It is connected to the blower fan (5) by the specified speed circuit (12) with the switch (15) C interposed, but it is not connected to the lowest speed contact (61). In addition, at least the highest speed contact (64) and the air conditioning blower fan (5) are connected by a reduction speed circuit with a resistance and a switch having a resistance value larger than the resistance of the specified speed circuit, and the water temperature switch (2 ) Is OFF and the radiator motor fan (1) does not operate, the specified speed circuit (10), (12) switch (14) C, (15) of the air conditioning blower fan (5)
C is turned on and the switch (14) for the reduction speed circuit (11), (13)
B, (15) B is OFF, the water temperature switch (2) is ON, and the radiator motor fan (1) is operating, the designated speed circuit (14) of the air conditioning blower fan (5) C, (15) C
The control mechanism of the air-conditioning blower fan is provided in which the switch is turned off and the switches (14) B and (15) B of the reduction speed circuits (11) and (13) are turned on.

[Operation] In the above configuration, when the water temperature switch is turned off and the radiator motor fan is not operating, the switch of the designated speed circuit of the air conditioning blower fan is on and the switch of the reduction speed circuit is off, so the speed is reduced. If the power source is connected to the contact corresponding to the predetermined speed in the adjusting switch, the power source flows through the speed reduction circuit of the contact and operates at the specified speed of the air conditioning blower fan. When the water temperature of the engine rises above a certain temperature, the water temperature switch turns on and the radiator motor fan operates. At this time, the designated speed circuit switch of the air conditioning blower fan turns off and the reduction speed circuit switch turns on. The blower fan operates at a speed that is less than the specified speed.

[Effect of device]

Therefore, in the present invention, when the radiator motor fan operates, the air conditioning blower fan operates at a speed lower than the speed specified by the speed adjustment switch, so that the power load of the battery does not increase and the battery is prevented from running down.

〔Example〕

The present invention will be described with reference to an embodiment shown in FIG.
(1) is a radiator motor fan, which is connected to the battery (17) by a circuit (4) including a water temperature switch (2) and a relay (3). (5) is an air conditioning blower fan (6)
Is a speed adjustment switch of the air conditioning blower fan (5),
The speed adjustment switch (6) has an OFF contact (60) and a first speed contact.
5 of (61), 2nd speed contact (62), 3rd speed contact (63), 4th speed contact (64)
The contacts are fixedly provided, and the contacts (60), (61), (62),
A movable contact (65) connected to the battery (17) can be connected to each of (63) and (64). The speed adjustment switch
The first speed contact (61) of (6) and the air conditioning blower fan (5) are resistors
Connected by the 1st speed circuit (8) with (7) interposed, the 2nd speed contact (6
2) and the air conditioning blower fan (5) are connected by a second speed circuit (9) connected to the front side of the resistor (7), and the third speed contact (63) and the air conditioning blower fan (5) are connected to the resistance. Speed circuit (10) connected to the latter stage of the device (7) and a reduction circuit connected to the second speed circuit (9)
A reduction circuit connected by the (11) and the fourth speed contact (64) and the air conditioning blower fan (5) are connected to the fourth speed circuit (12) and the second speed circuit (9) without the resistor (7). The coil (14) A of the relay (14) is connected to the third speed circuit (10) and the reduction circuit (11) by being connected with (13).
4 speed circuit (12) with switches (14) B and (14) C having
And the reduction circuit (13) include the switches (15) B, (15) C that share the coil (15) A of the relay (15), and the relay (14) and the relay (15) C
The coils (14) A and (15) A of (15) are connected to the water temperature switch (2) of the radiator motor fan (1) via the circuit (16).

In the above configuration, when the temperature of the cooling water for the engine (not shown) is lower than or equal to the predetermined temperature, the water temperature switch (2) is OFF, so the relays (14), (15) coils (14) A, (15) A Is a switch of 3rd speed circuit (10) and 4th speed circuit (12)
(14) C, (15) C is ON, switch (14) for reduction circuit (11), (13)
B, (15) B is OFF. If the movable contact (65) is connected to the 1st speed contact (61) in this state, the air conditioning blower fan (5) will rotate at the 1st speed, and if it is connected to the 2nd speed contact (62).
(5) rotates at 2nd speed, if connected to 3rd speed contact (63), air conditioning blower fan (5) rotates at 3rd speed, if connected to 4th speed contact (64), air conditioning blower fan (5) Rotate at 4th speed. Water temperature switch when the temperature of engine cooling water exceeds a specified temperature
(2) is turned on and current flows through the circuit (4) through the relay (3) to activate the radiator motor fan (1), but at the same time the coil (14) A, (of the relay (14), (15) The current of 15) A flows and the switches (14) C and (15) C of the third speed circuit (10) and the fourth speed circuit (12) are turned off, and the switches (14) of the reduction circuits (11) and (13) B, (15) B
Turns on. Therefore, move the movable contact (65) to the first speed contact (61).
Alternatively, when the second speed contact (62) is connected, current flows through the first speed circuit (8) or the second speed circuit (9), and the air conditioning blower fan (5) is
It operates at the 2nd or 5th speed, but the movable contact (65) has the 3rd contact (6
When connected to the 3rd or 4th speed contact (64), current flows through the reduction circuit (11) or the reduction circuit (13) to the 2nd speed circuit (9), and the air conditioning blower fan (5) becomes 2 It operates at high speed and can reduce the power load of the battery (17) accordingly.

Other than the above embodiment, a resistance may be individually interposed in each designated speed circuit of the air conditioning blower fan, or a resistance may be interposed in the maximum speed circuit. Also, a reduction circuit for connecting to the first speed circuit may be provided at the second speed contact, a reduction circuit for contacts at the third speed or higher may be connected to the first speed circuit, or a speed lower than the specified speed of the contact may be designated. It may be connected to any of the speed circuits.

[Brief description of drawings]

 FIG. 1 is a circuit diagram of an embodiment of the present invention. In the figure, (1) …… Radiator motor fan, (2) …… Water temperature switch, (3) …… Relay, (4) …… Circuit, (5) …… Air conditioning blower fan, (6) …… Speed adjustment Switch, (7) ... resistor, (8) ... first speed circuit, (9) ... second speed circuit, (10) ... third speed circuit, (12) ... four speed circuit, (11), (13) …… Reduction circuit, (14), (15) …… Relay, (16) …… Circuit, (17) …… Battery,

Claims (1)

[Scope of utility model registration request] 1. A water temperature switch for engine cooling water, a radiator motor fan and an air conditioning blower fan which are operated by ON / OFF operation of the water temperature switch, and a speed adjusting switch for the air conditioning blower fan. Each of the adjusting switches has a plurality of contacts that correspond to a specified speed and can be connected to a power source.The contacts other than the highest speed contact and the lowest speed contact of the speed adjusting switch and the air conditioning blower fan are connected to each other. It is connected by a specified speed circuit with a resistance and a switch having a resistance value corresponding to the specified speed, and the lowest speed contact and the air conditioning blower fan are connected by a specified speed circuit with a resistance having the maximum resistance value The contact and the air-conditioning blower fan are connected by a specified speed circuit with a switch. In at least the highest speed contact and the air conditioning blower fan are further connected by a reduction speed circuit in which a resistance and a switch having a resistance value larger than the resistance of the specified speed circuit are interposed, the water temperature switch is OFF, and the radiator motor fan is When not operating, the switch of the designated speed circuit of the air conditioning blower fan is turned on, the switch of the reduction speed circuit is turned off, and the water temperature switch is turned off.
When N and the radiator motor fan is operating, the switch of the designated speed circuit of the air conditioning blower fan is turned off and the switch of the reduced speed circuit is turned on.