JPH0234082Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle air conditioning control device, and particularly to a vehicle air conditioning control device that performs air conditioning by driving an air damper with a motor.

[Prior Art] Vehicle air conditioning control systems not only provide a comfortable indoor environment for passengers, but also provide a safe environment because hot, cold, and polluted indoor air can reduce the driver's attentiveness and reaction ability. It has an extremely important meaning from above.

Normally, in this type of vehicle air conditioning control device, the vehicle air conditioning control device is placed near the driver's seat to switch modes, air volume, or temperature.
The operator can obtain a desired vehicle interior environment by operating appropriate switches.

FIG. 8 shows the internal mechanism of such a vehicle air conditioner.

In the figure, the outside air introduced from the outside air introduction port 12 or the inside air introduced from the inside air introduction port 14 is selected by the inside/outside air switching damper 10, and the air is introduced into the air conditioner via the evaporator 18 by the suction force of the blower motor 16. .

Here, the evaporator 18 cools and dehumidifies the introduced air, and this cooled and dehumidified air is heated directly or via the heater core 22 by switching the air mix damper 20, and both can be adjusted appropriately. The air temperature is adjusted.

Then, the air whose temperature has been appropriately adjusted by the air mix damper 20 is selected by the defroster damper 24 and the heater-cooler switching damper 26 to the defroster outlet 28, the taller outlet 30, or the heater outlet 32, and is directed into the vehicle interior as desired. It is guided in the mode of.

As mentioned above, in vehicle air conditioners, air dampers have extremely important functions such as switching between inside and outside air, controlling temperature, and selecting air outlets. This is to obtain the air conditioned condition inside the vehicle.

Conventionally, in a vehicle air conditioning control device that controls the position of a damper, driving force is transmitted from the lever to each damper via a wire by manually operating a slide lever formed protruding from the operation surface of the control device. , which controlled the position of the damper.

However, such manual air damper position control has a problem in that a large load is placed on lever operation, giving an unpleasant operating feeling to the operator.

Therefore, in recent years, a motor-driven vehicle air conditioning control device having an operation surface as shown in FIG. 9 has been developed.

In the figure, the operation surface is provided with a blower air volume selection switch 34, an air conditioner operation switch 36, an outlet selection switch 38, an inside/outside air selection switch 40, and a temperature setting switch 42. Position control is performed by a drive motor with a positioning mechanism.

That is, the internal mechanism of an air conditioning control device having an operation surface as shown in FIG. 9 is generally configured as shown in FIG. 10, and the inside/outside air switching mechanism is not shown in the figure. ing.

In the figure, the air conditioning control device includes a system control section 44, a damper positioning mechanism 46, and an inside/outside air switching switch 40.

In the figure, when the outside air changeover switch button of the inside/outside air changeover switch 40 is pushed in, the outside air changeover switch 40a is turned on in conjunction with this. With the ON operation of the outside air selection switch 40a, the system control unit 44 supplies a drive current to the drive motor 48, and by driving the drive motor 48 in a predetermined direction, the inside/outside air switching damper 10 moves in the direction of arrow A in the figure.
It rotates as shown.

With this damper rotation or rotation of the drive motor, the sliding contacts 46a of the damper positioning mechanism 46,
46b slides on the fixed contacts 46c, 46d, 46e, and 46f as shown by arrow B from the state shown by the broken line in the figure, and reaches the position shown by the solid line.

When the sliding contacts 46a and 46b reach the same position, the fixed contacts 46e and 46 by the sliding contact 46b
The conduction between f is cut off, and even if the outside air switching switch button is in the pressed state, the drive motor 48 is no longer driven and the damper 10 is controlled to be positioned at this position.

In this state, when the inside air changeover switch button is pushed in, the inside air changeover switch 40b is turned ON in conjunction with this, and the drive motor 48 is reversed, so that the completely opposite effect to that described above is performed.

Therefore, according to such an air conditioning control device, the desired cabin air conditioning condition can be obtained simply by operating the keyboard-type switch etc. provided on the operation part with a good feel. It is becoming popular.

[Problems to be solved by the invention] Problems of the prior art However, in the above-mentioned vehicle air conditioning control device in which the air damper is driven by a motor, the mechanisms such as the system control section, the damper positioning mechanism, and the switch section are However, the space occupied in the instrument panel increases, and the cost of the device increases, making it difficult to use in general vehicles.

Moreover, with this type of air conditioning control device, although it is possible to easily control the air damper position set corresponding to each switch, it is extremely difficult to control the damper to an intermediate position of each switch, and it is difficult to control the damper to the intermediate position of each switch. Another problem was that the degree of freedom of choice was narrowed.

Purpose of the invention The present invention has been devised in view of the above-mentioned conventional problems, and its purpose is to provide an inexpensive vehicle air conditioning control device that has a simple configuration and has a wide degree of freedom in selecting air conditioning conditions. .

[Means for Solving the Problems] In order to achieve the above object, the vehicle air conditioning control device according to the present invention is divided into two contact pieces in a neutral space made of an electrically insulating part, and the drive motor is divided into two contact pieces. a movable contact that moves in conjunction with an air damper driven by a movable contact, a fixed contact that is arranged in parallel with the movable contact, and a movable contact that slides on both of the contacts in conjunction with a slide lever, It is characterized by having a sliding contact that drives the drive motor in a predetermined direction by controlling conduction with the fixed contact.

[Function] As is clear from the above-mentioned configuration, according to the vehicle air conditioning control device according to the present invention, when the operator places the slide lever in a predetermined position, the sliding contact moves in conjunction with the slide lever, and the movable contact and sliding over fixed contacts.

Then, at the slide lever stop position, that is, the sliding contact stop position, conduction control between a predetermined movable contact piece and a fixed contact is performed, and the drive motor is rotationally driven in a predetermined direction.

Along with this, the position of the air damper is controlled,
At the same time, the movable contact moves in conjunction with the rotation of the air damper.

The movable contact has a neutral space, and when the sliding contact reaches a position corresponding to the neutral space due to the movement of the movable contact, the electrical conduction between the movable contact piece and the fixed contact by the sliding contact is interrupted, and the drive motor stops, and the air damper and movable contact stop at that position.

Therefore, by slidingly arranging the slide lever at a predetermined position, it becomes possible to control the air damper steplessly to any position.

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

FIG. 2 shows the operation surface of a vehicle air conditioning control device to which the present invention is applied.

In the figure, the operation surface 50 includes a slide knob 52 for selecting an air outlet and a slide knob 5 for temperature setting.
4. A slide knob 56 for switching between inside and outside air and a slide knob 58 for switching the blower air volume are arranged.

In this example, the stepless control mechanism of the air damper, which is a feature of the present invention, is applied to all of the selection of the outlet, the temperature setting internal/external air switching, and the blower air volume switching, but the mechanisms are almost the same. The inside/outside air switching mechanism will be explained below.

FIG. 3 shows the internal structure around the inside/outside air switching mechanism of the vehicle air conditioning control device according to this embodiment.

In the figure, an internal member 56 of a slide knob 56 is shown.
A is provided with a long hole, and through the long hole,
It is interlocked with the slide lever 62.

The slide lever 62 is interlocked with a sliding contact in a positioning mechanism 64 of the internal/external air switching damper, and the drive motor 66 is driven to rotate in a predetermined direction depending on the position of the sliding contact.

The driving force of the drive motor 66 moves a movable contact in the positioning mechanism 64 via a control lever 68, and further rotates an inside/outside air switching damper (not shown) via a cable 70.

This condition is explained in more detail in FIGS. 1 and 4.

In the figure, from the drive motor 66, the decelerator 7
A drive shaft 74 protrudes through the drive shaft 7.
4 has a control lever 68 fitted therein.

Further, the slide lever 62 is rotatably supported on the boss 76 of the drive shaft 74, and as a result, the control lever 68 is rotated by the slide lever 62.
2 will rotate on the same axis.

The slide lever 62 passes through a housing 78 of the damper positioning mechanism 64, and the housing 78 includes a sliding contact board 80 attached to the slide lever 62.

Further, a movable contact board 82 is disposed above the sliding contact board 80, and is configured to be movable coaxially with the sliding contact board 80 in conjunction with the control lever 68.

The movable contact board 82 has two movable contacts 84.
a, 84b are fixed, fixed contacts 86a, 86b are installed in parallel with these on the inner wall of the housing 78, and sliding contacts 88a, 88b are sliding contacts facing the movable contact 84 and fixed contact 86. It is provided on the substrate 80.

Here, as shown in FIG. 1, each movable contact 8
4a and 84b are each divided by a neutral space 90 into two contact pieces 84a-, 84a- and 84b-, 84b-.

The internal/external air switching damper positioning mechanism of the vehicle air conditioning control system according to this embodiment is constructed as described above, and its operation will be explained below with reference to FIGS. 5 and 6.

In FIG. 5, the anode of the power source is connected to the fixed contact 86a, and the cathode is connected to the fixed contact 86b.

In this state, it is assumed that the slide lever 62 is slid and the sliding contacts 88a, 88b reach the positions shown in FIG. 5A.

In this state, the power supply current is supplied to the motor 66 via the fixed contact 86a, the sliding contact 88a, and the movable contact piece 84a-, and flows out to the cathode via the movable contact 84b-, the sliding contact 88b, and the fixed contact 86b. .

In such a conductive state, the motor 66 is
The air damper is rotated as shown in FIG.
Move it in the direction shown.

When the drive motor 66 is driven by a predetermined amount and reaches the state shown in FIG.
b-, 84b-, that is, the neutral space 90 is reached, electrical conduction between the movable contact piece and the fixed contact by the sliding contact 88 is interrupted, and the rotational drive of the motor 66 is stopped.

Therefore, the air damper is rotated by an angle corresponding to the sliding distance of the slide lever, and is controlled to be positioned at that position.

On the other hand, FIG. 6 shows a state in which the slide lever is slid in a direction opposite to that shown in FIG. 5.

As shown in FIG. 5A, when the sliding contact 88 is arranged at the left end of the fixed contact 86, the power supply current flows through the fixed contact 86a, the sliding contact 88a, and the movable contact piece, completely opposite to the case shown in FIG. 84a- to the motor 66, and the drive motor 66 rotates in the direction of the arrow E, opposite to the arrow C.

Therefore, the air damper interlocked with the drive motor rotates in the opposite direction to that shown in FIG. 5, and at the same time, the movable contact board 82 also moves in the direction of arrow F.

As a result, if the drive motor 66 rotates by a predetermined amount, the state shown in FIG.
Neutral space 90 and sliding contact 8
It is understood that since the distance from 8 is large, the amount of motor drive increases compared to the case shown in FIG.

As described above, according to the vehicle air conditioning control device according to the present embodiment, by slidingly arranging the slide lever at a predetermined position, it becomes possible to control the air damper steplessly to any position.

Furthermore, unlike in the past, a system control section and the like are not required, making it possible to reduce the size and cost of the device.

In the present invention, it is also preferable to provide a moderation section in the center of the neutral space, as shown in FIG. 7B.

That is, as shown in No. 7A, the sliding contact is biased by a spring 92 in the direction of the fixed contact or the movable contact, but in this case, the movable contact pieces 84-, 8
It is preferable to provide a hill portion 94 between the contact points 4 and 4 so that the sliding contact points 88 do not fall into the neutral space.

However, in such a configuration, the sliding contact 88 stops at the side edge of the hill portion 94, and the sliding contact 88 stops at the side edge of the hill portion 94.
8 and the movable contact pieces 84-, 84- may cause chattering.

Therefore, as shown in FIG. B, if a concave moderation part 94a is provided at the center of the hill part 94 and the sliding contact can be stopped only at this position, the chattering can be reliably prevented. This ensures that the sliding contact is stopped.

Although this embodiment has described the positioning mechanism of the air damper for switching between inside and outside air, the position control of other air mix dampers, defroster dampers, heater-cooler switching dampers, etc. can be performed in exactly the same manner.

Further, although the present embodiment has been described with respect to a slide lever type vehicle air conditioning control device, it goes without saying that the present invention can also be applied to, for example, a push button type device.

In this case, by sliding the sliding contact in accordance with the degree to which the push button is pressed (push stroke), it is possible to obtain exactly the same effect as in the previous embodiment.

[Effects of the invention] As explained above, according to the vehicle air conditioning control device according to the invention, since the drive amount of the air damper drive motor is set by the slide lever, the air damper can be controlled steplessly to any position. Furthermore, since it is possible to drive the air damper by motor without using a system control unit or the like as in the conventional case, it is possible to provide an inexpensive vehicle air conditioning control device with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the air damper positioning mechanism of the vehicle air conditioning control device to which the present invention is applied, FIG. 2 is an external view of the operation surface of the vehicle air conditioning control device to which the present invention is applied, and FIG. 3 is the above-mentioned FIG. 4 is an explanatory diagram of the internal structure of the air damper positioning mechanism shown in FIG. 1, and FIGS. 5 and 6 are action explanatory diagrams of the air damper positioning mechanism shown in FIG. 1. , Fig. 7 is an explanatory diagram of an embodiment with improved neutral space, Fig. 8 is an explanatory diagram of the internal mechanism of a general vehicle air conditioner, and Fig. 9 is a conventional motor-driven air conditioning control device. FIG. 10 is an explanatory diagram of the internal mechanism of the air conditioning control device shown in FIG. 9. 62...Slide lever, 64...Positioning mechanism, 66...Drive motor, 68...Control lever, 70...Cable, 80...Sliding contact board, 82...Movable contact board, 84...Movable contact,
86... Fixed contact, 88... Sliding contact, 90...
neutral space.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a vehicle air conditioning control device that controls the position of an air damper using a drive motor and achieves desired air conditioning in a vehicle interior, two contact pieces each in a neutral space consisting of an electrically insulating part. a pair of movable contacts that move in conjunction with the drive motor; a pair of fixed contacts arranged in parallel with the pair of movable contacts; and a pair of fixed contacts arranged in parallel with the pair of movable contacts; a pair of sliding contacts that slide and connect one of the movable contact pieces or the neutral space of each movable contact to a corresponding fixed contact, respectively; Connect the contact pieces facing each other across the neutral space of the same movable contact to terminals of different polarities of the drive motor, and drive the movable contact pieces on the same side of the neutral space of different movable contacts. When connected to terminals of different polarity on the motor, when the sliding contact is in contact with the moving contact piece, the current is supplied to the drive motor so that the sliding contact moves towards the neutral space of the moving contact. , by moving the sliding contact onto the movable contact piece by moving the slide lever, the driving motor is driven until the sliding contact reaches neutral space, thereby steplessly controlling the air damper to an arbitrary position. Air conditioning control device for vehicles. (2) A vehicle characterized in that, in the device according to claim (1) of utility model registration, the neutral space is provided with a moderation portion for stopping the sliding contact at the center of the neutral space. air conditioning control equipment.