JPH0130246Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a vehicle air conditioner, and particularly relates to an improvement in an air volume switching circuit.

[Prior Art] Vehicles such as passenger cars are equipped with air conditioners to adjust the temperature inside the car. Heater on/off control and blower motor rotation speed control are performed. Conventionally, such air conditioners have two types of circuit configurations: manual specifications and automatic specifications.In the case of manual specifications, a desired air volume adjustment mode is set according to the passenger's preference. If you set the changeover switch to ``AUTO'' mode, the temperature inside the car will be automatically controlled to the desired state, but it can also be adjusted manually. It's summery.

For example, in the case of an automatic specification device, the changeover switch 10 has an appearance as shown in FIG.
By manually operating the lever 12 in the direction of arrow A, the temperature control circuit changes from the OFF state to "AUTO", "L (low)", "M (medium)", and "
H
(High)", and the heater on/off and the air flow rate of the blower motor are controlled accordingly via the air volume switching circuit.

Hereinafter, the configuration and operation of each conventional air conditioner having the manual specification and automatic specification circuit configurations will be explained.

Manual specification air conditioner Figure 4 shows the circuit configuration of a manual specification air conditioner.

This air conditioner includes a blower switch 10a and a switching circuit 14 for the blower switch 10a, and a blower motor 18 is connected to a power source via a heater relay 16.

The heater relay 16 is connected to the blower switch 10.
A controls the power supply and the blower motor 18 on and off, and the blower motor 18 is equipped with a heater resistor 2.
0a is connected. Further, this heater resistor 20a is connected to a blower switch 10a via a switching circuit 14.

The heater resistor 20a is connected to the blower motor 1.
8 and has intermediate taps, each tap being selected by a blower switch 10a. In this way, the blower motor 1
The speed of 8 is controlled by the mode selection of blower switch 10a.

In the above, the blower switch 10a is
It is possible to switch to each mode of "OFF", "Lo", "M1", "M2", and "Hi", and in any mode other than "OFF", the coil of the heater relay 16 is energized.
The state is turned on, and the blower motor 18 and the power source are connected. The speed of the blower motor 18 is the slowest in the "Lo" mode, and increases as the mode shifts to the "Hi" mode.

Automatic specification air conditioner Figure 5 shows the circuit configuration of an automatic specification air conditioner.

In the same figure, this automatic specification air conditioner includes a blower switch 10b and a switching circuit 14, as in the case of the manual specification described above, and also includes the necessary components for automatically switching the air volume. Features have been added.

That is, first, the switching circuit 14 includes heat mode switches 22 and 24 and a water temperature switch 2.
6 and 28 are incorporated as a pair, and an auto blower switch 30 and an auto relay 32 are connected.

One switch set 2 provided as a pair of the heat mode switch and water temperature switch
2, 26 are connected between the power supply and the blower switch 10b, and the other set of switches 24, 28 are connected between the power supply and the blower switch 10b via the auto relay 32.
connected between b.

One water temperature switch 26 is set to be turned on when the water temperature is 30°C or higher, and the other water temperature switch 28 is set to be turned on when the water temperature is 60°C or higher.

When the blower switch 10b is set to the ``AUTO'' mode, the heat mode switches 22 and 24 are both set to ``OFF'' when the air outlet is the foot air outlet. When the temperature is below 30°C, water temperature switches 26 and 28 are both turned off, heater relay 16 does not operate, and therefore blower motor 18 does not operate.

However, when the water temperature reaches 30 to 60°C, the water temperature switch 26 is turned on and the blower motor 18 is driven to rotate in the "Lo" mode.

Additionally, when the water temperature reaches 60°C or higher, the water temperature switch 28 turns on, and the auto relay 32
As a result, the rotation speed of the blower motor 18 is controlled by the auto blower switch 30.

The auto blower switch 30 is connected to an air mix damper (not shown), and the speed of the blower motor 18 is automatically controlled by the opening degree of the air mix damper.

[Problems that the invention attempts to solve] Conventional problems However, as a dealer option,
There may be cases where it is necessary to change from a manual specification air conditioner to an automatic specification.

In such a case, conventionally, the blower switch and heater register had to be replaced with automatic type ones, and a new auto blower switch, auto relay, heat mode switch, and water temperature switch had to be installed.

Therefore, the replacement work is troublesome and requires a lot of man-hours.

In addition, the manual blower switch was discarded after replacement, resulting in a large economic loss. In addition, there are two types of blower switches, manual and automatic, which increases the unit production cost and creates the possibility of incorrect assembly when replacing the blower switch.

[Purpose of the invention] This invention was made to solve this problem. By sharing the blower switch between the automatic specification and the manual specification, it is possible to unify the blower switch into one type, thereby reducing the product cost. The purpose of the present invention is to provide a vehicle air conditioner that can reduce the amount of air pollution and facilitate replacement work.

[Means for Solving the Problems and Their Effects] The vehicle air conditioner according to this invention includes a blower motor that drives a blower for blowing air, a heater relay that controls on/off of the blower motor, and a plurality of outlet ends. a heater resistor in which the resistance value between the heater resistor and the blower motor changes in stages at each outlet end, and a plurality of switching terminal pieces corresponding to each outlet stage of the heater resistor, and a plurality of switching terminal pieces for turning the heater relay on and off. and a blower switch that switches and controls the connection with each outlet end of the heater resistor, and an automatic specification type switch inserted in the path for turning on the heater relay at the stage that maximizes the resistance value of the heater resistor of the blower switch. control switch, and a detachable element that is detachably provided and short-circuits the control switch for the auto specification.By attaching and detaching this detachable element, the blower switch automatically adjusts the air volume according to the conditions inside the vehicle. It is characterized by the fact that it can be used in both the automatic specification, which adjusts, and the manual specification, which adjusts the air volume by manual operation.

According to the present invention constructed as described above, when the detachable member is attached, the control switch for automatic specification is short-circuited, and the manual specification is set, allowing the user to arbitrarily control the air volume with the manual switch of the blower switch. be able to.

On the other hand, if the attachment/detachment element is removed, the control switch for automatic specification is released, and the airflow becomes automatic specification in which the air volume is controlled to the optimum value according to the situation according to predetermined conditions.

Therefore, according to the present invention, it is possible to share the same blower switch by inserting and removing the detachable member, which facilitates assembly and reduces manufacturing costs. Since there is no need to dispose of the parts, it is also possible to economize on the parts used.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIGS. 1 and 2 respectively show the circuit configurations of a manual specification and an automatic specification of a vehicle air conditioner according to the present invention.

In FIG. 1, in the device of this embodiment, a blower motor 40 is connected to a power source via a heater relay 38. The heater relay 38 is connected to the power supply and the blower motor 4 by a blower switch 34, which will be described later.
0 is controlled to be on/off, and a heater resistor 50 as an external resistor is connected to the blower motor 40. The heater register 50 has intermediate taps 50a, 50b, and 50c, and the rotation speed of the blower motor 40 is controlled by arbitrarily selecting each of these taps 50a, 50b, and 50c.

As described above, the features of the present invention are that the blower switch 34 has a plurality of switching terminals, and the blower switch 34 has a detachable element 56 for switching each switching terminal of the blower switch 34 to automatic specification or manual specification. The switching circuit 36 includes a switching circuit 36.

That is, in this embodiment, the blower switch 34 has a plurality of switching terminals 42 arranged in a row,
44, 46, and a slider 48 that slides on the switching terminals 42, 44, 46 so as to be able to move toward and away from them.
Depending on the position of the slider 48, the blower switch 34 can be set to "OFF", "Lo", or "Lo", respectively.
The speed of the blower motor 40 is controlled by switching to "M1", "M2", and "Hi" modes. Unless the blower switch 34 is set to the "OFF" position, the coil 38a of the heater relay 38 is excited and turned on, thereby connecting the blower motor 40 and the power source.

The switching circuit 36 serves to connect the blower switch 34 and the blower motor 40. Specifically, the switching circuit 36, the heater resistor 50, and the heater relay 38 connect the blower switch 34 and the power source.

This switching circuit 36 includes a switch 52 which will be described later.
A detachable element 56 is provided at an open terminal 54 provided near the switch 52 on the heater relay 38 side.

Switching terminals 42, 4 of the blower switch 34
4, 46 are arranged in three rows, and among these switching terminals 42, 44, 46, the first switching terminal 4
Reference numeral 2 serves to switch the rotation speed of the blower motor 40, and a second switching terminal 44 serves to turn on and off the heater. Further, the third switching terminal 46 extends in the longitudinal direction and serves as a common contact and is connected to ground.

The first switching terminal 42 is equally divided into four switching terminal pieces 42-1, 42-2, 42-3, and 42-4, and each of the first switching terminal pieces 42-1, 42-2, 42-3, and 42-4 corresponds to "Lo" and "M1" of the blower switch 34, respectively. ”, “M2”, and “Hi” modes. The switching terminal piece 42-1 corresponding to the "Lo" mode is in an open state, and the other switching terminal pieces 42-2 to 42-4 are connected to the switching circuit 3.
6 to intermediate taps 50c, 50b, and 50a of the heater resistor 50, respectively. Then, the slider 48 is connected to the first switching terminal 42
The state is “OFF” when the device is not in contact with the device.

The second switching terminal 44 is disassembled into two switching terminal pieces 44-1 and 44-2, and one switching terminal piece 41-1 is connected to the connection/disconnection terminal 56 of the switching circuit 36, and is used for switching the blower switch. It serves to turn on the heater relay 38 in the "Lo" mode of the controller 34. Further, the other switching piece 44-2 is connected to the first switching terminal piece 42 in other modes (M1, M2, Hi) of the blower switch 34.
-1, 42-3, and 42-4 so as to be connected to the heater resistor 50.

As described above, when the blower switch 34 is in the "OFF" state, the heater relay 38 is not energized.
Therefore, blower motor 40 does not operate.

When the blower switch 34 is in the "Lo" mode, the heater relay 38 is energized via the detachable element 56 of the switching circuit 36, and the blower motor 40 is energized.
The entire resistance of the heater resistor 50 is connected as an external resistance. Similarly, the blower switch 34
is set to "M1", "M2", or "Hi" mode, the blower motor 40 responds to the external resistance determined by the intermediate tap of the heater resistor 50.
It is designed to be driven at a predetermined speed.

Next, the circuit configuration of the automatic specification shown in FIG. 2 will be explained. In this case, in addition to the above-mentioned manual specification configuration, a function necessary for automatically switching the air volume is added.

That is, in addition to the blower switch 34 and switching circuit 36 described above, an auto blower switch 66 and an auto relay 68 are connected to the switching circuit 36. At the same time, the heater resistor 50 is replaced with a heater resistor 70 of a different specification.

At this time, the detachable element 56 used in the manual specification is removed.

Heat mode switches 58, 60 and water temperature switches 62, 64 are built into the switch 52, and the heat mode switches 58, 60 are turned off when the water is being blown at the feet, and turned on at other times. It is set as follows. Further, the water temperature switch 62 is set to be "ON" when the water temperature is 30°C or higher, and the water temperature switch 64 is set to be "ON" when the water temperature is 60°C or higher. The auto relay 68 is energized when either the water temperature switch 64 or the heat mode switch 60 is turned on.

The auto blower switch 66 includes switching terminals 72 and 74 arranged in two rows and a slider 76 that slides on the switching terminals 72 and 74 so as to be able to approach and separate. One switching terminal 74 is connected to ground via an auto-relay 68, and the other switching terminal 72 is equally divided into seven switching terminal pieces 72-1 to 72-7, each of which is connected to the heater resistor 70. It is connected to the.

That is, the switching terminal piece 72-1 is connected to the intermediate tap 70a of the heater register 70 at a high-speed contact of the blower motor 40, and the switching terminal piece 72-1 is connected to the intermediate tap 70a of the heater register 70.
Reference numeral 2 is a medium speed contact which is connected to the switching terminal piece 72-7 and also to the intermediate tap 70b. Further, the switching terminal piece 70-3 is also a medium speed contact and is connected to the intermediate tap 70c of the heater register 70, and the switching terminal piece 72-4 is a low speed contact and is connected to the intermediate tap 70d of the heater register 70.

In this way, the high-speed contact is provided on the outermost side, the medium-speed contact is provided on the inside, and the low-speed contacts are provided on the innermost side. This is because the movement of the air mix damper differs depending on the mode. For example, during heating, the air mix damper moves upward from the intermediate position.
This is because it is moved to the opposite side during cooling.

The slider 76 is directly connected to an air mix damper (not shown), and the speed of the blower motor 40 is automatically switched depending on the opening degree of the air mix damper. The operation in this automatic specification is exactly the same as that of the conventional automatic specification apparatus described above.

As described in this embodiment above, when changing a manual specification air conditioner to an automatic specification using the dealer option, the most important and complicated The blower switch 34 having a similar configuration can be shared, and there is no need to replace it.

Therefore, it is possible to eliminate waste, such as erroneously assembling the manual specification and automatic specification blower switches as in the past, or discarding the manual specification blower switch 34 after replacement.

[Effects of the invention] As explained above, this invention provides a blower switch switching circuit having a blower switch having a plurality of switching terminals and a detachable element for switching and connecting each terminal of the blower switch to automatic or manual operation. By including the above, the blower switch can be used in common for automatic and manual use, and there is no need to replace the blower switch in the dealer option.

For this reason, the conventional two types of blower switches are unified into one type, and mass production can be expected, and incorrect assembly of the blower switch at the time of replacement can be prevented.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the circuit configuration of the manual specification of the vehicle air conditioner according to the present invention, Fig. 2 is a diagram showing the circuit configuration of the automatic specification of the same device, Fig. 3 is an external view of the changeover switch, FIG. 4 is a diagram showing the circuit configuration of a conventional vehicle air conditioner with manual specifications, and FIG. 5 is a diagram showing the circuit configuration of the same device with automatic specifications. 34...Blower switch, 36...Switching circuit, 42, 44, 46...Switching terminal, 48...
Slider, 56...Detachable element.

Claims (1)

[Claims for Utility Model Registration] A blower motor that drives an air blower, a heater relay that controls on/off of the blower motor, and a plurality of outlet ends, each of which has a resistance value between it and the blower motor. A blower switch that has a heater resistor that changes in stages and a plurality of switching terminal pieces corresponding to each outlet stage of the heater resistor, and switches and controls the on/off of the heater relay and the connection with each outlet end of the heater resistor. and a control switch for automatic specification, which is inserted in a path for turning on the heater relay at the stage where the resistance value of the heater resistor of the blower switch is maximized, and a control switch for automatic specification, which is detachably provided. The blower switch has two types: an automatic specification in which the air volume is automatically adjusted according to the conditions in the vehicle interior, and a manual specification in which the air volume is adjusted manually by the attachment and detachment of the control switch. A vehicle air conditioner characterized in that it can be shared by multiple users.