JPH07315042A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To prevent useless power consumption by forming a series circuit by a blower fan motor for sending conditioned air into the vehicle interior and a ventilation motor for driving a louver, and connecting this circuit to an on-vehicle battery. CONSTITUTION:One terminal of a blower fan motor 10 is connected to a plus terminal of an on-vehicle battery 9, and the movable contact 12 of a louver switch is connected to the other terminal of the blower fan motor 10. One terminal of a ventilation motor 11 and the first fixed terminal 14a of a fan switch are connected to an on-side fixed contact 12a. One terminal side of a resistance 13, the second fixed terminal 15a of the fan switch, and a resistance 17 connected to the off-side fixed contact 12b of the louver switch are connected to the other terminal of the ventilation motor 11, and the third fixed contact 16a of the fan switch is connected to the other end of the resistance 13. The earth side first to third movable contacts 14-16 of the fan switch are opened/ closed by the switching operation of an operator. The ventilation motor 11 thereby functions as the air quantity regulating resistance of the fan motor 10 so as to be able to save power consumption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner suitable when applied to a vehicle equipped with a blower fan motor and a ventilation motor.

[0002]

2. Description of the Related Art Conventionally, in a vehicle air conditioner, air introduced into an air conditioning duct from an outside air inlet port or an inside air inlet port equipped in a vehicle is pressure-fed to an evaporator by a blower fan driven by a blower fan motor, and the blower fan blows the air. The structure is such that the air supplied and the refrigerant supplied from the compressor are heat-exchanged by an evaporator to be vaporized, and blown out into the vehicle interior as conditioned air from an outlet provided in the vehicle instrument panel. In addition, by oscillating (swinging) a plurality of louvers (airflow direction vanes) installed in the above-mentioned air outlet in a horizontal direction by a ventilation motor, a harmony wind can be evenly distributed in the vehicle interior. There is also a vehicle air conditioner.

FIG. 5 shows a wiring system for a blower fan motor and a ventilation motor in a conventional vehicle air-conditioning system. An in-vehicle battery 50 has a blower fan motor 52 for driving a blower fan via a wiring 51.
(For example, a rating of 96 [W]) is connected to one end, and the other end of the blower fan motor 52 has a resistor 53,
54 is connected. In addition, the blower fan motor 52
Between the resistor 53 and the resistor 53, a first fixed contact 55a of a fan switch (not shown) for adjusting the air flow provided in the air conditioning control unit of the vehicle instrument panel is connected, and between the resistor 53 and the resistor 54. Is connected to the second fixed contact 56a, and the resistor 54 is connected to the third fixed contact 57a. The first to third movable contacts 55 to 57 are brought into contact state or non-contact state with the first to third fixed contacts 55a to 57a according to the operation of the fan switch by the vehicle driver.

In addition, the in-vehicle battery 50 has another wiring 5
One end of a ventilation motor 59 for driving an outlet louver is connected via 8 and the other end of the ventilation motor 59 is used for instructing louver swinging provided in an air conditioning control unit of a vehicle instrument panel. The fixed contact 60a of the louver switch (not shown) is connected. The movable contact 60 of the louver switch is adapted to be turned on / off in conjunction with the on / off operation of the first to third movable contacts 55 to 57 of the fan switch.

As shown in FIG. 6, when the vehicle driver sets the air volume to the "high state" by the fan switch, the first movable contact 55 comes into contact with the first fixed contact 55a and the blower fan motor 52 is driven. A large amount of air is blown from the outlet. When the air volume is set to "medium" (about 70% of "high") by the fan switch, the second
The movable contact 56 comes into contact with the second fixed contact 56a to drive the blower fan motor 52, and the resistor 53 consumes electric power (generates heat). As a result, a medium amount of air is blown from the outlet. Air volume "low" by fan switch
When set to (about 30% of "high state"), the third movable contact 57 comes into contact with the third fixed contact 57a to drive the blower fan motor 52, and power is further consumed by the two resistors 53 and 54. As a result, a small amount of air is blown from the air outlet. When the fan switch is set to off, the air volume from the outlet becomes zero. When the louver switch is turned on, the movable contact 60 comes into contact with the fixed contact 60a and the ventilation motor 59 is driven, and as a result, the louver at the outlet port swings horizontally at a medium speed.

[0006]

However, in the above-described conventional vehicle air conditioner, when adjusting the amount of air blown from the outlet of the vehicle instrument panel into the vehicle compartment, two blower fan motors are provided. Since the air volume is adjusted by connecting the resistors in series and adjusting the output voltage of the blower fan motor by appropriately consuming (generating heat) with each of these resistors, the resistors provided only for adjusting the air volume can be used. As a result of wasteful consumption of electric power, there is a problem in terms of energy saving. In addition to the blower fan motor, it also has a ventilation motor,
Compared with the case where only the blower fan motor is installed,
As a result, the load increases by the amount of the ventilation motor,
There was a problem that fuel efficiency deteriorates.

[0007]

It is an object of the present invention to improve the inconveniences of the above-mentioned conventional examples, and in particular, when both a blower fan motor and a ventilation motor are equipped, useless power consumption is eliminated and energy saving effect is improved. It is an object of the present invention to provide a vehicle air conditioner that achieves the above.

[0008]

According to the present invention, a conditioned wind outlet equipped with a swingable wind direction plate and electric power are supplied from an on-vehicle battery to feed conditioned wind into the vehicle interior through the conditioned wind outlet. A vehicle air conditioner including a blower fan motor that drives a fan and a ventilation motor that is supplied with electric power from the vehicle-mounted battery and that swings the wind direction plate, in which a series circuit includes the blower fan motor and the ventilation motor. And the series circuit is connected to the vehicle-mounted battery. This aims to achieve the above-mentioned object.

[0009]

According to the present invention, when an occupant of a vehicle equipped with a vehicle air conditioner attempts to blow out a harmonious wind evenly into the vehicle interior by, for example, rocking the wind direction plate of the conditioned wind outlet, By operating a predetermined switch attached to the vehicle air conditioner, the on state of the ventilation motor is selected and the degree of the blast of the conditioned air from the conditioned air outlet is selected. Since a series circuit is composed of the blower fan motor and the ventilation motor, and the series circuit is connected to the vehicle battery, when the vehicle battery is energized to the blower fan motor, the battery blows the fan motor and the ventilation motor. An electric current flows through the path through the motor. In this case, the internal resistance of the ventilation motor functions as a conventional resistance for adjusting the air flow.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of the main part of a vehicle equipped with a vehicle air conditioner will be described with reference to FIGS. 2 and 3. On the front side of the instrument panel 2 of the vehicle 1, the air conditioner which constitutes the vehicle air conditioner. With the control unit 3 installed,
The operation section of the air conditioning control unit 3 includes a fan switch 4 for adjusting the air flow and a louver switch 5 for instructing louver swing.
Etc. are provided. Also, instrument panel 2
Is equipped with a plurality of outlets 6, 7, and 8, and each of the outlets 6 to 8 is provided with a plurality of louvers (air flow direction plates) 6a.
.., 7a ..., 8a ... swings horizontally (pivots)
Each is installed as possible.

Further, an in-vehicle battery 9 is installed in the engine room of the vehicle 1, and an air conditioning duct and a blower fan motor 10 to which electric power is supplied from the in-vehicle battery 9 inside the instrument panel 2. A ventilation motor 11 is installed. The blower fan motor 10 drives a blower fan (not shown above) that pressure-feeds the air introduced from the outside air introduction port or the inside air introduction port to the evaporator. Further, the ventilation motor 11 is adapted to drive the louvers of each of the outlets 6 to 8. As a result, the louvers of the outlets 6 to 8 swing (swing) in the horizontal direction at a predetermined speed, and as a result, the harmonious air blown from the outlets 6 to 8 is evenly distributed in the vehicle compartment. There is.

Next, the configuration of the wiring system of the blower fan motor and the ventilation motor of the vehicle air conditioner in this embodiment will be described with reference to FIG.
One terminal of the blower fan motor 10 is connected to the positive terminal of the above, and the on-side fixed contact 12a of the movable contact 12 of the louver switch 5 is connected to the other terminal of the blower fan motor 10. The movable contact 12 of the louver switch 5 is brought into contact with the on-side fixed contact 12a or the off-side fixed contact 12b according to the operation of the louver switch 5 by the vehicle driver.

On-side fixed contact 12a of the louver switch 5
Is connected to one terminal of the ventilation motor 11, and the other terminal of the ventilation motor 11 is connected to one end of the resistor 13. The first fixed contact 14 a of the fan switch 4 is connected to one terminal of the ventilation motor 11, and the fan switch 4 is connected to the other terminal of the ventilation motor 11.
Second fixed contact 15a of the fan switch 4 is connected to the other end of the resistor 13. The first to third movable contacts 14 of the fan switch 4
Nos. 16 to 16 are in contact with or out of contact with the first to third fixed contacts 14a to 16a, respectively, in accordance with the operation of the fan switch 4 by the vehicle driver.

Further, one end of the resistor 17 is connected to the off-side fixed contact 12b of the louver switch 5, and the other end of the resistor 17 is connected between the ventilation motor 11 and the resistor 13. . That is, in this embodiment, by connecting the blower fan motor 10 to the ventilation motor 11 in series, the ventilation motor 11
The feature is that it also has the function of the conventional air flow control resistor.

Next, the operation of this embodiment constructed as described above will be described with reference to FIG.

For example, the louvers 6a of the air outlets 6 to 8 ...
Taking the case of swinging the heads 7a ... 8a ... as an example, the vehicle driver can see that the louvers 6a.
When the on state is selected by operating the louver switch 5 to cause the a ... to swing, the movable contact 12 of the louver switch 5 contacts the on-side fixed contact 12a. When the vehicle driver operates the fan switch 4 to set the air volume to the “high state” in order to increase the volume of the harmonious air from the air outlets 6 to 8 into the vehicle interior, the first movable contact of the fan switch 4 is set. 14 contacts the first fixed contact 14a. In this case, the second and third movable contacts 15, 16 of the fan switch 4
Are in non-contact with the second and third fixed contacts 15a and 16a, respectively.

Along with this, the blower fan motor 10, the on-side fixed contact 12a with which the movable contact 12 of the louver switch 5 comes into contact with the on-vehicle battery 9, and the first of the fan switch 4.
A current path is formed through the fixed contact 14a and the first movable contact 14, and electric power is supplied from the vehicle battery 9 to the blower fan motor 10. As a result, the blower fan motor 10 is driven to operate the blower fan. In this case, since no resistors are connected to the blower fan motor 10, the air volume of the harmonious air blown into the vehicle compartment from the air outlets 6 to 8 is large (“high state”).

At this time, the second and third movable contacts 15 and 16 of the fan switch 4 have the second and third fixed contacts 15a and 16a.
Since the in-vehicle battery 9 does not supply electric power to the ventilation motor 11, the ventilation motor 11 is stopped and the outlet 6
Louvers of ~ 8 do not oscillate (when there is a large amount of harmonic wind). Therefore, since a large amount of harmonious air is blown from the outlets 6 to 8 to the specific space (driver's seat side and passenger's seat side) in the vehicle interior, a feeling of heating is strongly felt in the severe winter season and in the midsummer season. A feeling of cooling will be strongly felt.

On the other hand, the vehicle driver operates the fan switch 4 to set the air volume in the "medium state" (in the "high state") in order to make the volume of the harmonious air blown into the vehicle interior from the air outlets 6 to 8 medium. 70%), the fan switch 4
The second movable contact 15 comes into contact with the second fixed contact 15a.
In this case, the first and third movable contacts 1 of the fan switch 4
4, 16 are in non-contact with the first and third fixed contacts 14a, 16a, respectively.

Along with this, the on-side fixed contact 12a in contact with the blower fan motor 10 and the movable contact 12 of the louver switch 5 from the vehicle battery 9, the ventilation motor 11, the second fixed contact 15a of the fan switch 4, and the second movable contact. A current path passing through the contact 15 is formed, and the in-vehicle battery 9
As a result of the power being supplied from the blower fan motor 10,
The blower fan motor 10 is driven to operate the blower fan. At this time, since the internal resistance of the ventilation motor 11 functions as a resistance for adjusting the air volume, the air volume of the harmonious air blown into the vehicle compartment from the air outlets 6 to 8 becomes medium (“medium state”).

At this time, since the second movable contact 15 of the fan switch 4 is in contact with the second fixed contact 15a, electric power is also supplied from the on-vehicle battery 9 to the ventilation motor 11, resulting in the blower fan motor. The ventilation motor 11 is also driven together with 10, and the air outlet 6 to
As a result of the louver 8 being swung in the horizontal direction at a medium swing speed, the harmonious air blown from the outlets 6 to 8 is evenly distributed in the vehicle compartment. This improves comfort in the vehicle interior.

On the other hand, the vehicle driver operates the fan switch 4 to reduce the amount of the harmonious air from the outlets 6 to 8 by operating the fan switch 4 so that the air amount is "low" (about 30% of "high"). When set to, the third movable contact 1 of the fan switch 4
6 contacts the third fixed contact 16a. In this case, the first and second movable contacts 14 and 15 of the fan switch 4 are
The second fixed contacts 14a and 15a are not in contact with each other.

Along with this, the on-side fixed contact 12a in contact with the blower fan motor 10 and the movable contact 12 of the louver switch 5 from the vehicle battery 9, the ventilation motor 11, the resistor 13, and the third fixed contact 16 of the fan switch 4.
a, a current path passing through the third movable contact 16 is formed, and electric power is supplied from the vehicle-mounted battery 9 to the blower fan motor 10. As a result, the blower fan motor 10 is driven to operate the blower fan. In this case, the internal resistance of the ventilation motor 11 in addition to the resistance 13 functions as an air volume adjusting resistance, so that the volume of the harmonious air blown into the vehicle compartment from the air outlets 6 to 8 is small (“low”). Status").

At this time, since the third movable contact 16 of the fan switch 4 is in contact with the third fixed contact 16a, electric power is supplied from the vehicle battery 9 to the ventilation motor 11 as a result. The ventilation motor 11 is also driven together with 10, and the air outlet 6 to
As a result of the louver 8 being swung in the horizontal direction at a slow swinging speed, the harmonious wind blown from the outlets 6 to 8 is evenly distributed in the vehicle compartment. This improves comfort in the vehicle interior.

On the other hand, when the vehicle driver operates the fan switch 4 to select the off state in order to stop the blowout of the harmonious air from the outlets 6 to 8, the first of the fan switches 4 is selected.
To the third movable contacts 14 to 16 are the first to third fixed contacts 1
4a to 16a are not in contact with each other. Accordingly, the supply of electric power from the vehicle battery 9 to the blower fan motor 10 is stopped, the blower fan motor 10 is not driven, and the blower fan does not operate. As a result, the blowing of the harmonious air from the outlets 6 to 8 into the vehicle interior is stopped.

On the other hand, when the louvers at the outlets 6-8 are not swung, the louver switch 5 is operated to select the off state when the conditioned air is simply blown out from the outlets 6-8. Then, the movable contact 12 of the louver switch 5 comes into contact with the off-side fixed contact 12b, and the fan switch 4 is operated to set the amount of air blown from the outlets 6 to 8 to a desired state. The contact contacts the fixed contact. As a result, the current from the vehicle-mounted battery 9 becomes
It flows through a path passing through the blower fan motor 10, the movable contact 12 of the louver switch 5, the off-side fixed contact 12b, the resistor 17 ... In this case, the louvers at the outlets 6 to 8 do not perform a swinging motion, so that the conditioned wind blows from the outlets 6 to 8 toward a predetermined space in the vehicle compartment.

As described above, according to this embodiment, the blower fan motor 10 and the ventilation motor 11 are connected in series. Therefore, a plurality of air flow rate controllers connected in series to the blower fan motor as in the prior art are adjusted. The internal resistance of the ventilation motor 11 can also serve as the function of one of the resistances for use, and thus the air flow control resistor provided only for air flow control as in the past consumes power wastefully. It is possible to eliminate such a problem as described above, save energy, and prevent deterioration of fuel consumption as in the past.

[0029]

As described above, according to the vehicle air conditioner of the present invention, since the blower fan motor and the ventilation motor form the series circuit, the blower fan motor is connected in series as in the conventional case. The internal resistance of the ventilation motor can also be used as the function of the air flow rate adjustment resistor, which results in the waste of power consumed by the air flow rate adjustment resistor that was provided only for the air flow rate adjustment as in the past. It is possible to solve the problem, save energy, and prevent deterioration of fuel consumption as in the conventional case.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a connection state of a blower fan motor and a ventilation motor of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a main part of a vehicle equipped with a vehicle air conditioner according to the present embodiment.

FIG. 3 is an explanatory diagram showing an arrangement state of an air conditioning control unit and each air outlet in the present embodiment.

FIG. 4 is an explanatory diagram showing a relationship between a fan switch setting state, an air flow rate of a blower fan, and a swinging speed of an outlet louver in the present embodiment.

FIG. 5 is a circuit diagram showing a connection state of a blower fan motor and a ventilation motor of a vehicle air conditioner in a conventional example.

FIG. 6 is an explanatory diagram showing a relationship between a setting state of a fan switch, an air volume of a blower fan, and a swinging speed of an outlet louver in a conventional example.

[Explanation of symbols]

 1 vehicle 6,7,8 blower outlet 6a, 7a, 8a as a harmony wind blower louver as wind vane 9 vehicle battery 10 blower fan motor 11 ventilation motor

Claims (1)

[Claims] 1. A blower fan motor equipped with a swingable wind vane, and a blower fan motor for driving a fan supplied with electric power from an on-vehicle battery and sending a blown wind into the vehicle interior through the blower outlet. A vehicle air conditioner that is supplied with power from the vehicle-mounted battery and includes a ventilation motor that swings the wind direction plate, wherein a series circuit is configured by the blower fan motor and the ventilation motor, and the series circuit Is connected to the vehicle-mounted battery.