JPH0645296B2 - Vehicle air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle air conditioner.

[Prior art]

Conventionally, in this type of air conditioner, a plurality of push-type operation switches are arranged on the operation panel, and the actual blowout mode of the airflow is changed to a desired blowout mode by selectively operating each of these operation switches. In this case, the air temperature is changed to one or the air temperature of the air stream is adjusted to one of a plurality of desired air temperature.

[Problems to be solved by the invention]

However, in such a configuration, the number of operation switches corresponding to each desired blowout mode and each desired blowout temperature is arranged on the operation panel, and the rotary motor and the blowout source that are the drive source for switching the blowout modes are arranged. Since each relay circuit is independently used to drive each rotary motor that is a drive source for temperature adjustment, the number of operation switches is too large, which complicates the structure of the operation panel and increases production cost. In addition to increasing the number of relay circuits, there are problems that the number of relay circuits is too large and the circuit configuration becomes complicated and the production cost increases.

Therefore, in order to cope with such a situation, the present invention is designed to use, as much as possible, each operating mechanism and circuit configuration necessary for switching the blowout mode and adjusting the blowout temperature in the vehicle air conditioner. Especially.

[Means for solving problems]

In solving such problems, the structural features of the present invention are as follows.
A blowout mode switching mechanism that is driven by a first rotary electric motor that rotates when supplied with electric power from a power source, and that switches an actual blowout mode of an airflow into the vehicle interior of the vehicle to a desired blowout mode.
A blowout temperature adjusting mechanism that is driven by a second rotary motor that rotates when supplied with power from the power source and adjusts the actual blowout temperature of the airflow to a desired blowout temperature, and a blowout mode detection that detects the actual blowout mode Means, a blowout temperature detecting means for detecting the actual blowout temperature, a setting means for setting the desired blowout mode or a blowout temperature, and the first so as to reduce the difference between the set blowout mode and the detected blowout mode. The power supply is controlled to supply power to the first rotary motor from the power supply to rotate the single rotary motor, and the second rotary motor is rotated to reduce the difference between the set outlet temperature and the detected outlet temperature. In the air conditioner including a control unit that controls the power supply from the power source to the second rotary electric motor, the blowout mode detection unit may be configured such that the blowout mode is detected. There is a first variable resistor that changes its resistance value according to the operation of the switching mechanism, and the resistance value of this first variable resistor is detected as the actual blowout mode, and the blowout temperature detecting means is the blowout temperature adjusting mechanism. Of the second variable resistor, the resistance value of the second variable resistor is detected as the actual blowout temperature, and the setting means sets the desired blowout mode or blowout temperature. An operation member operated to a corresponding position, a third variable resistor for changing a resistance value according to the operation of the operation member, and a first (or second) switching operation for the first (or second) A variable resistor is connected in series to the third variable resistor and the first variable resistor is connected to the first variable resistor in series.
(Or a second) rotary electric motor is connected to the power supply, and a resistance value of the third variable resistor is set as the desired blowout mode (or blowout temperature), and the control means is , Generating respective boundary values of a predetermined voltage width representing a substantially coincident state between the actual blowout mode (or blowout temperature) and the desired blowout mode (or blowout temperature) as the first and second boundary value voltages, respectively. A range in which the inter-resistor voltage generated between the boundary value voltage generating means and the first (or second) variable resistance and the third variable resistance does not include the predetermined voltage width with the first boundary value voltage as a boundary. A first output signal is generated, a second output signal is generated when the voltage across the resistor is in a range that does not include the predetermined voltage width with the second boundary value voltage as a boundary, and the voltage across the resistor is Between the first and second boundary voltage An output signal generating means to extinguish the first and second output signal when said first (or second)
Power is supplied from the power source to the first (or second) rotary motor via the switching operation means under the switching operation of the resistor in response to the first (or second) output signal. And a power supply means for maintaining the voltage between the first and second boundary voltage values.

[Action effect]

With the above configuration of the present invention, therefore, when switching the actual blowing mode to the desired blowing mode, the operating member is operated to a position corresponding to the desired blowing mode, and the switching operation means is provided. The first switching operation, the resistance value of the third variable resistor becomes a value corresponding to the operating position of the operating member, and the third variable resistor is connected in series to the first variable resistor of the blowout mode detecting means.
The output signal generating means generates a first (or second) output signal based on that the resistance-to-resistance voltage generated thereby is not between the first and second boundary value voltages, and the first rotary motor is , In cooperation with the power supply means responsive to the first (or second) output signal, from the power supply to change the resistance-to-resistance voltage between the first and second boundary voltage. When the electric power is supplied and the electric motor is rotated, the blowing mode switching mechanism is switched to the desired blowing mode.

Further, in adjusting the actual blowout temperature to a desired blowout temperature, if the operating member is operated to a position corresponding to the desired blowout temperature and the switching operation means is operated by the second switching operation, the third variable The resistance value of the resistance becomes a value corresponding to the operation position of the operation member, the third variable resistance is connected in series to the second variable resistance of the blowout temperature detection means, and the inter-resistance voltage generated thereby is the first and the second resistance. The output signal generating means generates the first (or second) output signal based on the fact that the voltage is not between the second boundary voltage, and the second rotary motor outputs the first (or second) output signal. In cooperation with the power feeding means in response to
And a second boundary voltage, the electric power is supplied from the power source to rotate and the blowing temperature adjusting mechanism is driven to adjust to the desired blowing temperature.

In this way, when switching the blowing mode or adjusting the blowing temperature, the switching operating means, the third variable resistor and the operating member, the output signal generating means, the boundary voltage generating means and the power feeding means are shared. Therefore, it is possible to realize simplification and cost reduction of each configuration of the setting means and the control means.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.
1 and 2 show the overall structure of a vehicle air conditioner according to the present invention. This air conditioner
As shown in FIG. 2, the air duct 10, the air mix damper 20 and the heater 3 arranged in the air duct 10.
0 and a rotary damper 40, and the air duct 10 opens into the passenger compartment of the vehicle at its opening 11. In such a case, the opening 11 includes an outlet 11a that opens upward in the vehicle compartment, an outlet 11b that opens downward in the vehicle interior, and an outlet 11c that opens toward the windshield of the vehicle. It is composed by.

The air mix damper 20 moves in cooperation with the servo mechanism 50 to adjust the ratio of the non-heated portion of the air flow to the heated portion to be heated by the heater 30, and blows air from the opening 11 of the air duct 10 into the vehicle interior. Controls the flow outlet temperature. In this case, the servo mechanism 5 incorporates the DC motor M1 (see FIG. 1) and moves the air mix damper 20 in accordance with the normal rotation (or reverse rotation) of the DC motor M1. The rotary damper 40 rotates in cooperation with the servo mechanism 6 with the rotation shaft 41 thereof as a reference, and the opening 42 thereof is opened at any one of the outlets 11a, 11b, 11c or both the outlets 11a.
Connect to a and 11b. In such a case, the servo mechanism 60
Includes a DC motor M2 (see FIG. 2), and the rotary damper 4 is rotated in accordance with the normal rotation (or reverse rotation) of the DC motor M2.
0 is rotated in one direction (or the other direction).

The opening 42 of the rotary damper 40 communicates with the outlet 11a, the opening 42 communicates with the outlet 11b, the opening 42 communicates with the outlet 11c, and the openings 42 communicate with both outlets 11a and 11b. Vent mode, heat mode, defroster mode,
And bi-level mode respectively.

Further, the air conditioner has an operation panel 70 (see FIG. 3) arranged at a proper position in the vehicle compartment of the vehicle, and the operation panel 70 has an operation lever mechanism 71 and
A push-type switch mechanism 72 is provided. The operation lever mechanism 71 includes an elongated groove 71a and an operation lever 71b mounted in the groove 71a so as to be displaceable in the longitudinal direction.
On the surface portion of the operation panel 72 located on the upper side in FIG. 3 of the groove 71a, a display pattern 73a corresponding to the bend mode, a pattern 73b corresponding to the bi-level mode, and a heat mode. A corresponding display pattern 73c and a display pattern 73d corresponding to the defroster mode are sequentially displayed at intervals from the left side to the right side in the figure of the groove 71a in FIG. On the other hand, a cooling / heating display pattern 74 is displayed along the longitudinal direction of the groove 71a on the surface portion of the operation panel 72 located on the lower side of the groove 71a in FIG. In such a case, the maximum cooling position of the air mix damper 20 corresponds to the left end shown in FIG. 3 of the cooling / heating display pattern 74, and the maximum heating position of the air mix damper 20 corresponds to the right end shown in FIG. 3 of the cooling / heating display pattern 74. Correspond.

The variable resistor 71c (first
(See the drawing), a slider 71d that is in sliding contact with the variable resistor 71c is connected to the slider 71d corresponding to the displacement position of the operation lever 71b. A resistance value corresponding to a desired position of the mix damper 20 (that is, a desired cooling / heating position) is set. However, the resistance value of the variable resistor 71c becomes larger as the operation lever 71b is located on the left side in the drawing in FIG. The switch mechanism 72 includes a pair of pushing portions 7
2a, 72b (see FIG. 3) and a pair of double throw switches 72c, 72d, 72e, 72f (see FIG. 1). The double throw switches 72c and 72d are
It is composed of a pair of fixed contacts f and g and a movable contact h which is selectively put into each of the fixed contacts f and g.
Each double throw switch 72e, 72f includes a pair of fixed contacts i,
j and a movable contact k that is selectively applied to each of the fixed contacts i and j. Then, the pushing portion 7
By the pushing operation of 2a, the pushing portion 72b is returned to the original position, and the movable contacts h of the double throw switches 72c and 72d are turned on to the respective fixed contacts f, and at the same time, the double throw switches 72e and 72f are pushed. Each of the movable contacts k is adapted to be inserted into each of the fixed contacts i. Also, the pushing portion 72b
By the pushing operation of, the pushing portion 72a is returned to the original position, and the movable contacts h of the double throw switches 72c and 72d are respectively turned on to the fixed contacts g, and at the same time, the double throw contacts 72 are moved.
Each of the movable contacts k of e and 72f is adapted to be made into each fixed contact j. In such a case, each fixed contact i, i is connected to each input terminal of the DC motor M1, while each fixed contact j, j is connected to each input terminal of the DC motor M2. In addition, the pushing portion 72
a is for the switching operation of the blowing mode, while
The pushing portion 72b is for a cooling / heating adjusting operation.

Further, the air conditioner, as shown in FIG. 1, includes both variable resistors 80 and 90, a Zener diode 100,
Reference voltage generator 110 and window comparator 120
And has a relay circuit 130, the variable resistor 80,
The variable resistor 90 is built in the servo mechanism 50 and connected between the fixed contacts g, g of the double throw switches 72c, 72d, while the variable resistor 90 is built in the servo mechanism 60 and the double throw switches 72c, 72d. Each fixed contact f, f
Is connected in between. A slider 81 slidingly contacting the variable resistor 80 is operatively connected to the air mix damper 20 so as to be interlocked with the movement of the air mix damper 20, while a slider 91 slidingly contacting the variable resistor 90. Is operatively connected to the rotary damper 40 so as to be connected to the rotation of the rotary damper 40. Then, the actual position of the air mix damper 20 is specified by the resistance value determined by the contact position of the variable resistor 80 with the slider 81, and the actual blowing mode of the rotary damper 40 is determined by the variable resistor 90. It is specified by the resistance value determined by the contact position with the moving element 91. In such a case, the resistance value of the variable resistor 80 becomes larger as the position of the air mix damper 20 is closer to the cooling side. Further, the resistance value of the variable resistor 90 increases as the rotary angle of the rotary damper 40 increases in the clockwise direction shown in FIG.

The Zener diode 100 is grounded at its anode and is connected to the double throw switch 72d via the resistor 101.
Is connected to the movable contact h. The cathode of the Zener diode 100 has a resistor 102 and a variable resistor 71c.
Is connected to the movable contact h of the double throw switch 72c through the resistor 103 and is connected to the positive side terminal of the DC power source B through the resistor 103. The Zener diode 100 generates a constant voltage when fed from the DC power source B.

The reference voltage generator 110 is composed of three resistors 111, 112 and 113 which are connected in series with each other, and applies a constant voltage from the Zener diode 100 to the resistors 111, 11 respectively.
The voltage is divided according to the resistance value of 2,113, and both resistors 111,11
The divided voltage generated at the two common terminals is generated as the first reference voltage, and the divided voltage generated at the common terminals of the resistors 112 and 113 is generated as the second reference voltage. The window comparator 120 is a pair of comparators 121 and 12.
The comparator 121 has two resistors 112 and 11 of the reference voltage generator 110 at its inverting input terminal.
3 is connected to the common terminal of the double throw switch 72c through the input resistor 121a at its non-inverting input terminal.

On the other hand, the comparator 122 has its non-inverting input terminal connected to the common terminal of both resistors 111 and 112 of the reference voltage generator 110, and the inverting input terminal of this comparator 122 is a double throw switch via the input resistor 122a. 72
It is connected to the movable contact h of c. In the window comparator 120 configured in this way, the voltage generated at the movable contact h of the double throw switch 72c is the reference voltage generator 1
When higher (or lower) than the first reference voltage from 10, the comparator 122 generates a low level signal (or high level signal) via the resistor 121b. When the voltage generated at the movable contact h of the double throw switch 72c is higher (or lower) than the second reference voltage from the reference voltage generator 110,
The comparator 121 generates a high level signal (or a low level signal) via the resistor 122b.

The relay circuit 130 includes first and second electromagnetic relays (each having a double throw switch), and the first electromagnetic relay has the double throw switch responsive to a high level signal from the comparator 121 to one side. Power supply to the movable contact k of the double throw switch 72e from the DC power supply B,
The double throw switch is turned on to the other side in response to the low level signal from the comparator 121, and the movable contact k of the double throw switch 72e is grounded. Further, the second electromagnetic relay turns on its double throw switch to one side in response to the high level signal from the comparator 122 to allow the power supply from the DC power source B to the movable contact k of the double throw switch 72f, In response to the low level signal from the comparator 122, the double throw switch is turned on to the other side, and the movable contact k of the double throw switch 72f is grounded. In the present embodiment configured as described above, it is assumed that the actual blowout mode is the defroster mode and the actual blowout temperature is at the minimum value. In this state, when it is desired to switch the actual blowout mode to the vent mode, the operation lever 71b is displaced to a position corresponding to the display pattern 73a (see FIG. 3) and the switch mechanism 72 is used.
When the pushing portion 72a is pushed, the resistance value of the variable resistor 71c increases to a value corresponding to the vent mode, and the movable contacts h of the double throw switches 72c and 72d of the switch mechanism 72 are respectively fixed contacts. At the same time when the movable contacts k of the double throw switches 72e and 72f are turned on, the movable contacts k of the double throw switches 72e and 72f are turned on to the fixed contacts 1.

At this time, the resistance of the variable resistor 90 is reduced in correspondence with the actual blowing mode (that is, the defroster mode). Therefore, the voltage generated at the movable contact h of the double throw switch 72c (hereinafter, referred to as resistance voltage) becomes lower than the first reference voltage from the reference voltage generator 110, and the comparator 121 generates a low level signal, and The comparator 122 generates a high level signal. Then, the first electromagnetic relay of the relay circuit 130 responds to the low level signal from the comparator 121 to ground the movable contact k of the double throw switch 72e, while the second electromagnetic relay of the relay circuit 130 causes the high electromagnetic signal from the comparator 122 to rise. In response to the signal, the power supply from the DC power source B to the DC motor M2 is allowed through the movable contact k and the fixed contact i of the double throw switch 72f.

Then, the DC motor M2 rotates to rotate the rotary damper 40 so that the opening 42 communicates with the outlet 11a. This means that the blowout mode has been switched to the vent mode. When the vent mode is entered in this way, the resistance value of the variable resistor 90 increases to a value corresponding to the vent mode, and the inter-resistor voltage generated at the movable contact h of the double throw switch 72c becomes the first and the first from the reference voltage generator 110. Rises to a value between the two reference voltages, the high level signal from the comparator 122 is inverted to a low level, and the second electromagnetic relay of the relay circuit 130 grounds the movable contact k of the double throw switch 72f to connect the DC motor M2. Stop.

Further, in such a state, when it is desired to set the blowout temperature to an intermediate temperature value between the minimum value and the maximum value, the operation lever 71
b is displaced to the position shown in FIG. 3 and the pushing portion 72b of the switch mechanism 72 is pushed. Then, the resistance value of the variable resistor 71c decreases to a value corresponding to the intermediate temperature value, and the double throw switches 72c, 72 of the switch mechanism 72 are provided.
At the same time that each movable contact h of d is made into each fixed contact g, each movable contact k of both double throw switches 72e and 72f is made to each fixed contact j.

At this time, the resistance value of the variable resistor 80 is increased corresponding to the actual blowout temperature. Therefore, the double throw switch 72
The voltage across the resistance generated at the movable contact h of c becomes higher than the second reference voltage from the reference voltage generator 110, and the comparator 121 generates a high level signal and the comparator 122 generates a low level signal. Then, in response to the high level signal from the comparator 121, the first electromagnetic relay of the relay circuit 130 allows the DC power source B to supply power to the DC motor M1 through the movable contact k and the fixed contact j of the double throw switch 72e.

Then, the DC motor M1 is rotated to move the air mix damper 20 to a position corresponding to the intermediate temperature value. This means that the blowout temperature has reached the intermediate temperature value. In such a state, the variable resistor 80
Becomes a value corresponding to the intermediate temperature value, the inter-resistance voltage generated at the movable contact h of the double throw switch 72c decreases to a value between the first and second reference voltages from the reference voltage generator 110, The high level signal from the comparator 121 is inverted to the low level, and the first electromagnetic relay of the relay circuit 130 grounds the movable contact k of the double throw switch 72e to stop the DC motor M1.

As can be understood from the above description, when the blowout mode is switched and the blowout temperature is adjusted, each single operating lever 71b, the reference voltage generator 110, the window comparator 120, and By sharing the relay circuit 130 with each other, the structure of the operation panel 70 can be simplified and the cost can be reduced, and the electric circuit configuration for driving the DC motors M1 and M2 can be simplified and the cost can be reduced. Further, it is possible to selectively perform the appropriate switching control of the blowout mode and the appropriate adjustment control of the blowout temperature.

In the above operation, the case where the blowout mode is switched to the vent mode and the blowout temperature is adjusted to the intermediate temperature value has been described, but the present invention is not limited to this, the blowout mode is switched to a mode other than the vent mode, and the blowout temperature is changed. When adjusting to a temperature other than the intermediate temperature value, substantially the same operation as described above can be performed to achieve the same effect as the above effect.

[Brief description of drawings]

1 and 2 show the overall configuration of the air conditioner according to the present invention, and FIG. 3 is a front view of an operation panel of the air conditioner. Explanation of symbols B ... DC power supply, M1, M2 ... DC motor, 11a,
11b, 11c ... Outlet, 20 ... Air mix damper, 40 ... Rotary damper, 50, 60 ... Servo mechanism, 70 ... Operation panel, 71a ... Groove, 71b ... Operation lever, 71c, 80, 90 ... Variable resistance, 72 ...
Switch mechanism, 72a, 72b ... Pushing unit, 72c, 7
2d, 72e, 72f ... Double throw switch, 110 ... Reference voltage generator, 120 ... Window comparator, 13
0: Relay circuit.

Claims (1)

[Claims] 1. A blow-out mode switching mechanism that is driven by a first rotary electric motor that rotates when supplied with power from a power source and switches an actual blow-out mode of an air flow into a vehicle interior of a vehicle to a desired blow-out mode; The second which rotates when supplied with power
An outlet temperature adjusting mechanism that is driven by a rotary electric motor to adjust the actual outlet temperature of the airflow to a desired outlet temperature, and an outlet mode detection unit that detects the actual outlet mode,
A blowout temperature detecting means for detecting the actual blowout temperature, a setting means for setting the desired blowout mode or a blowout temperature, and the first rotary motor so as to reduce the difference between the set blowout mode and the detected blowout mode. Control so as to supply power to the first rotary motor from the power source to rotate the
An air conditioner having control means for controlling the power supply from the power source to the second rotary motor to rotate the second rotary motor so as to reduce the difference between the set blown temperature and the detected blown temperature. In the above, the blowout mode detection means has a first variable resistor that changes a resistance value according to the operation of the blowout mode switching mechanism.
A resistance value of a variable resistor is detected as the actual blowout mode, and the blowout temperature detecting means has a second variable resistor that changes the resistance value according to the operation of the blowout temperature adjusting mechanism,
The resistance value of the second variable resistor is detected as the actual blowout temperature, and the setting means operates the operation member at a position corresponding to the desired blowout mode or the blowout temperature, and operates the operation member according to the operation. And a third variable resistor for changing the resistance value by means of a first (or second) switching operation, and the first (or second) variable resistor is connected in series to the third variable resistor and the first (or second) variable resistor is connected. Switching operation means for connecting the rotary motor of the second) to the power source, and setting the resistance value of the third variable resistor as the desired blowout mode (or blowout temperature), and the control means Actual blowout mode (or blowout temperature) and the desired blowout mode (or blowout temperature)
Boundary value voltage generating means for generating respective boundary values having a predetermined voltage width representing a substantially coincident state as the first and second boundary value voltages, the first (or second) variable resistance, and the third variable resistance.
A first output signal is generated when the inter-resistance voltage generated between the variable resistor and the variable resistance is within a range that does not include the predetermined voltage range with the first boundary value voltage as a boundary, and the inter-resistance voltage is the second boundary value voltage. A second output signal is generated when the voltage is in a range not including the predetermined voltage range with the boundary as a boundary, and the first and second output signals when the resistance-to-resistance voltage is between the first and second boundary voltage. Is supplied to the first (or second) rotary electric motor from the power source via the output signal generating means for extinguishing the power source and the switching operation means under the first (or second) switching operation. And a power supply means for maintaining the voltage across the resistance between the first and second boundary voltage values in response to a 1 (or second) output signal. Air conditioner.