JPS6241549A - Blow-off direction swing-control unit for air conditioner - Google Patents

Abstract

PURPOSE:To control the rotational speed of the rotary motor of a blow-off direction swing-control independently of a rotary motor for blasting and sufficiently secure the starting torque of the same rotary motor by actuating a second rotary motor at a rotational speed in accordance with an initial voltage or an adjusting voltage in response to the initial voltage or the adjusting voltage. CONSTITUTION:An air current is sent toward a blow-off port 11a by actuating a fan 12b by means of a DC motor 12a. Under conduction of a transistor 30, a set divided voltage from a slider 18c of a variable resistor 18b and generates the divided voltage as an analog voltage from the slider 18c. A reference voltage generator 40 receives the set divided voltage and produce the same as a reference voltage from a common terminal. The reference voltage corresponds to a predetermined starting time T necessary for securing a sufficient valve of the torque after starting of a DC motor M. A transistor 80 affords a feed current from a DC power source to a DC motor M in an amplification degree in accordance with the analog voltage Va from a potentiometer 20. Accordingly, the feed current to the DC motor M varies substantially proportional to the analog voltage Va and the rotational speed of the DC motor M is varied similarly in proportion thereto.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air conditioner, and in particular to an air outlet for an air conditioner suitable for swing control of the direction of air flow blown out from the air conditioner. The present invention relates to a directional swing control device.

[Prior art]

Conventionally, in this type of blowing direction control device,
As disclosed in Japanese Patent Application No. 9-185120, a geared motor operatively connected to a swinging louver provided at the air outlet of the air conditioner is connected to the motor of the blower of the air conditioner to swing the swinging louver. There are some that are connected in parallel.

In addition, as disclosed in Japanese Utility Model Application Publication No. 56-95911, a small magnet motor operatively connected to the wind direction control plate of an air conditioner is connected to a DC power source via a variable resistor in order to drive the wind direction control plate of the air conditioner. Some are designed to connect to.

[Problem that the invention seeks to solve]

However, in the former configuration, the voltage supplied to the geared motor is always equal to the voltage supplied to the blower motor, so there is a problem in that the rotational speed of the geared motor cannot be controlled independently of the blower motor. . In addition, since the load on the geared motor is smaller than that of the blower motor, the rated capacity of the geared motor is set smaller than that of the blower motor, so the rotation speed of the geared motor cannot be lowered. There are also some defects.

In addition, in the latter configuration, although there are no problems caused by the former configuration, for example, after stopping the rotation of the small magnet motor with the resistance value of the variable resistor at the maximum, There is a problem in that even if you try to restart the engine, sufficient starting torque cannot be secured.

Therefore, in order to deal with the above-mentioned problems, the present invention provides a blow-out direction swing control device for an air conditioner in which a rotary motor for controlling blow-off direction swing is independent of the rotary motor of the blowing means. The purpose of this invention is to control the rotational speed and always ensure sufficient starting torque for the rotary motor.

[Means for solving problems]

In solving this problem, the structural features of the present invention are as follows:
a first rotary electric motor that rotates when supplied with power from a power source; a blowing means that is driven by the first rotary electric motor to blow air toward the air outlet; and a second rotary electric motor that rotates when supplied with power from the power source. In the air conditioner, the air conditioner includes a rotating electric motor, and a swinging means that is driven by the second rotating electric motor and swings the blowing direction of the airflow blowing out from the air outlet, the variable air conditioner being connected to the power source. an adjusting means that has a resistor and a slider that is in sliding contact with the variable resistor, and generates an adjusted voltage from the slider at a position where the slider is in sliding contact with the variable resistor; and a clock means for generating a clock signal for a predetermined period of time from this time when power is supplied through the slider; Prohibiting and allowing means for allowing generation of the regulated voltage in response to the disappearance of the signal, generating an initial voltage in response to the generation of the timing signal, and causing the initial voltage to disappear in response to the disappearance of the timing signal. The present invention includes an initial voltage generating means and a driving means for driving the second rotary motor at a rotational speed corresponding to the initial voltage or the adjusted voltage in response to the initial voltage or the adjusted voltage.

[Function and effect]

By configuring the present invention in this manner, when the first rotating electric motor starts blowing air from the air blowing means to the air outlet, the timing means generates a timing signal, and the timer generates a timing signal. A voltage generating means generates an initial voltage,
Since the driving means drives the first rotary electric shaft at a rotational speed corresponding to the initial voltage, no matter what the sliding contact position relationship between the variable resistor and the slider in the adjusting means is, , the second rotating electric motor can always be reliably started with sufficient starting torque based on the initial voltage. Therefore, the smooth swinging motion of the swinging means in the blowing direction of the airflow can always be ensured even when the second rotating electric motor is started.

Further, after such start-up is completed, the adjusting means generates a regulating voltage in response to disappearance of the clock signal in cooperation with the prohibiting and allowing means, and the driving means generates the regulating voltage. Since the second rotary motor is driven at a corresponding rotational speed, the smooth rotational speed of the second rotary motor is controlled based on the adjustment voltage determined by the sliding contact position relationship between the variable resistor and the slider in the adjustment means. That is, it is possible to ensure a smooth swinging operation of the swinging means in the blowing direction of the air flow.

In such a case, by adjusting the sliding contact position of the slider with respect to the variable resistor, the adjusted voltage from the adjusting means can be freely selected regardless of the power supply voltage to the first rotary motor. The rotational speed of the second rotary electric motor, that is, the rocking speed of the rocking means can be freely controlled independently of the first rotary electric motor. Therefore, the rating of the second rotary electric motor can be determined independently (independently) of the first rotary electric motor, and the size of the second rotary electric motor can be reduced.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
FIG. 2 shows a blowout direction swing control device E according to the present invention.
FIG. 3 is an overall configuration diagram showing an example in which air conditioner C is applied to a vehicle air conditioner 10. The air conditioner 10 includes a blower tia 12 disposed within the air duct 11, and a blowing direction swinging mechanism 13 disposed at the outlet 11a of the air duct 11, and the blower 12 includes a DC electric tM12a,
The fan 12b is driven by a DC motor 12a to send airflow toward the air outlet 11a.

The blowout direction swinging mechanism 13 includes a DC motor M, a conversion mechanism (not shown) that converts the rotational motion of the DC motor M into a swinging motion, and a swinging mechanism that swings in response to the swinging motion of this conversion mechanism. The louver 13a swings and changes the blowing direction of the air flow blown from the fan 12b into the passenger compartment of the vehicle through the air outlet 11a based on the swing of the swing louver 13a.

In FIG. 2, reference numeral 14 indicates a switching damper that selectively opens and closes the outside air inlet 11b and the inside air inlet 11c of the air duct 11. In addition, each code 15a, 15b, 15
c is an evaporator, an air mix damper, and
16 indicates a heater, and reference numeral 16 indicates a double outlet 1 of the air duct 11.
A switching damper that selectively opens and closes 1a and 11d is shown. Further, the air outlet 11a corresponds to a vent mode in the air conditioner 10's air outlet mode, and the air outlet lid corresponds to a heat mode in the air outlet mode.

The air conditioner 10 also includes an air flow control device 17.
and a transistor circuit 18 connected between the air flow control device 17 and the DC motor 12a of the blower 12. The rotational speed of the electric motor 12a is calculated and generated as an output signal. The transistor circuit 18 is
It has a transistor 18a and a variable resistor 18b connected between the emitter and collector of the transistor 18a, and the variable resistor 18b is connected between the positive terminal B of the DC power supply and the input terminal of the DC motor 12a. However,
The transistor 18a, in cooperation with the variable resistor 18b, transfers the power supply current from the DC power supply to the DC motor 12a at an amplification degree corresponding to the value of the output signal from the airflow control device 17.
granted to. In this case, the variable resistor 18b generates a set divided voltage from the slider 18C depending on the degree of amplification of the transistor 18a.

The blowing direction swing control device EC has a potentiometer 20 and a transistor 30.
0 is composed of a variable resistor 21, a ground terminal 22 disposed at a distance from the variable resistor 21, and a slider 23 that slides into contact with the variable resistor 21 or the ground terminal 22.

The variable resistor 21 is connected at one end to the slider 18c of the variable resistor 18b via the resistor 21a, and the variable resistor 21
The other end is connected to the emitter of transistor 30. In this case, the collector of the transistor 30 is grounded via the resistor 31. Thus, the potentiometer 20 grounds the slider 23 through contact with the ground terminal 22. In addition, the potentiometer 20 has a slider 2
3, the slider 1 of the variable resistor 18b is connected to the variable resistor 18b when the transistor 30 is conductive.
Divide the set divided voltage from 8C and convert it to analog voltage V
A is generated from the slider 18c.

The reference voltage generator 40 connects the variable resistor 18c to the resistor 21a.
A set divided voltage is received through the potentiometer 20 and divided by a pair of series resistors 41 and 42, and the result of this voltage division is generated as a reference voltage from a common terminal (ie, an output terminal) of both series resistors. In such a case, the reference voltage corresponds to a predetermined starting time T necessary to ensure a sufficient value of torque in the DC motor M after starting. The charging/discharging circuit 50 has a resistor 51 which is grounded at one end and connected to the slider 23 of the potentiometer 20 via a capacitor 52 at the other end. Zener diode 60 via resistor 61
connected to the cathode of Further, the diode 53 has its cathode connected to a resistor 61 via a capacitor 52, and the anode of this diode 53 is connected to a resistor 54.
is grounded through. However, the capacitor 52
When placed in a charging state by receiving a set divided voltage from the variable resistor 18b via the resistor 21a and the potentiometer 20, or a Zener voltage generated from the Zener diode 60 via the resistor 61 as described below, the charging/discharging circuit 50
The difference between the voltage appearing on the slider 23 (or the Zener voltage) and the charging voltage of the capacitor 52 is generated as a comparison voltage from a common terminal (ie, an output terminal) of the resistor 51 and the capacitor 52. However, the charging time constant determined by the capacitor 52 and the resistor 51 corresponds to the predetermined starting time T.

Note that the capacitor 52 is connected to the potentiometer 20. It is discharged through the resistor 54 and diode 53 in a short time.

The comparator 70 compares the reference voltage from the output terminal of the reference voltage generator 40 and the comparison voltage from the output terminal of the charge/discharge circuit 50, and when the comparison voltage is higher (or lower) than the reference voltage, the comparator 70 is set to a high level. signal (or low level signal). This means that transistor 30 becomes non-conductive (or conductive) in response to a high level signal (or low level signal) from comparator 70.

The Zener diode 60 has a resistor 61 at its cathode,
It is connected to the slider 18c of the variable resistor 18b through the slider 23 of the potentiometer 20, the variable resistor 21, and the resistor 21a, and the anode of the Zener diode 60 is connected to the output terminal of the comparator 70 via the inverter 62. There is. In this case, the input terminal of the inverter 2 is connected to the output terminal of the comparator 70, and the output terminal of the inverter 62 is connected to the anode of the Zener diode 60. Thus, the Zener diode 60 is connected to the inverter 6 which responds to the high level signal (or low level signal) from the comparator 70.
The Zener voltage (hereinafter referred to as Zener voltage Vz) is generated (or extinguished) under the inversion action of No. 2. In such a case, the Zener voltage Vz has a value sufficient to ensure starting of the DC motor M.

The transistor 80 has its base connected to the cathode of the Zener diode 60;
The collector of transistor 80 is connected to the positive terminal B of the DC power supply, while the emitter of this transistor 80 is connected to the positive terminal B of the DC power supply.
is grounded through. Thus, the transistor 80 applies the power supply current from the DC power source to the DC motor M at an amplification degree corresponding to the analog voltage Va from the potentiometer 20 (or the Zener voltage Vz from the Zener diode 60). This means that the DC motor M rotates at a rotational speed that corresponds to the feed current.

Note that in FIG. 1, the capacitor 81 is the transistor 80.
oscillation prevention function, diode 82 performs a protection function of transistor 80, and diode 83 performs a reverse current blocking function.

In this embodiment configured as described above, when the air flow control device 17 generates an output signal while the slider 23 of the potentiometer 20 is grounded via the ground terminal 22, the transistor 18a outputs the output signal. The supply current from the DC power source is applied to the DC motor 12a in cooperation with the variable resistor 18b at an amplification degree corresponding to the signal value, and the variable resistor 18b applies the power supply current from the slider 18c to the DC motor 12a according to the amplification degree of the transistor 18a. Generates the set divided voltage.

Then, the fan 12b is driven by the DC electric motor ta12a, and the evaporator 15a and the air mix damper 1
5b and a heater 15c, the airflow is sent toward the outlet 11a. It is assumed that the switching damper 16 is in the state shown in FIG.

In this state, the slider 2 of the potentiometer 20
3 is brought into contact with the intermediate portion of the variable resistor 21, the reference voltage generator 40 receives a set divided voltage from the variable resistor 18b via the resistor 21a and the potentiometer 20, and generates a reference voltage, while simultaneously charging and discharging. A circuit 50 receives the set divided voltage and generates a comparison voltage. In this case, as described above, since the slider 23 of the potentiometer 20 is grounded, the capacitor 52 is in a completely discharged state. Therefore, the comparison voltage from the charge/discharge circuit 50 is equal to the voltage appearing on the slider 23 of the potentiometer 20 and is higher than the reference voltage from the reference voltage generator 40.

For this reason, when the comparator 70 generates a high level signal, the transistor 30 becomes non-conductive and prohibits generation of the analog voltage Va from the potentiometer 20, and at the same time, the Zener diode 60 changes the output of the inverter 62 to a low level. It conducts under the change of , and generates a Zener voltage Vz (see FIG. 3). Then, the transistor 80 applies the power supply current from the DC power supply to the DC motor M at an amplification degree corresponding to the Zener voltage from the Zener diode 60. Therefore, the DC motor M starts smoothly based on the power supply current from the transistor 80 corresponding to the Zener voltage Vz, and in response, the blowing direction swinging mechanism 13 starts the swinging mechanism for smooth swinging of the swinging louver 13a. The direction of the airflow from the outlet 11a is then swung.

In such a case, the variable resistor 2 in the potentiometer 20
Regardless of the contact position of the slider 23 with respect to 1, the starting of the DC electric taM can always be ensured based on the Zener voltage from the Zener diode 60, so the state of the potentiometer 20 is Sufficient starting torque of the DC motor M can always be ensured regardless of the situation.

When the charging of the capacitor 52 ends after the predetermined starting time T has elapsed, the comparison voltage from the charging/discharging circuit 50 becomes lower than the reference voltage from the reference voltage generator 40, and the comparator 70
The high level signal from the zener diode 6 changes to a low level signal, the transistor 30 becomes conductive, and at the same time the Zener diode 6
0 causes the Zener voltage Vz to disappear in response to the change of the output of the inverter 62 to a high level. Then, the potentiometer 20 generates an analog voltage Va in response to the conduction of the transistor 30, and the transistor 80 increases the power supply current from the DC power supply at an amplification degree corresponding to the analog voltage Va from the potentiometer 20 instead of the Zener voltage Vz. is applied to the DC motor M. Therefore, the DC motor M rotates smoothly based on the power supply current from the transistor 80 corresponding to the analog voltage Va, and the swing control of the blowing airflow by the blowing direction swinging mechanism 13 is maintained.

In this state, if the contact position of the slider 23 of the potentiometer 20 with respect to the variable resistor 21 is adjusted by sliding, the analog voltage Va from the potentiometer 20 changes as shown in FIG. 3. Therefore, transistor 8
The degree of amplification of 0, that is, the power supply current to the DC motor M changes approximately in proportion to the analog voltage Va, and the rotational speed of the DC motor t&M similarly changes in proportion. In other words, the speed control of the DC motor M, that is, the control of the blowing direction swinging speed by the blowing direction swinging mechanism 13, can be realized independently by adjusting the potentiometer 20, independently of the DC motor 12a. The directional swing speed can be freely set, and the rating of the DC motor M can be selected to a necessary and sufficient value independently of the DC motor 12a.

In addition, in the above-mentioned action, the potentiometer 2
Both DC motors 1 are operated while the contact position of the slider 23 with respect to the variable resistor 21 is maintained so that the analog voltage Va from 0 becomes a value insufficient for starting the DC motor M.
When the DC motor 12a is restarted after stopping the DC motor 2a, M, the DC motor M can be restarted under the amplification effect of the transistor 80 responsive to the Zener voltage Vz from the Zener diode 60 in the same manner as described above. Therefore, even in such a restart, sufficient restart torque of the DC motor M can always be ensured regardless of the state of the potentiometer 20.

In carrying out the present invention, a series circuit consisting of a resistor 63 and a diode 64 is connected to the inverting input terminal of the comparator 70 and the Zener diode 6, as shown in FIG.
0, it is possible to prevent the oscillation of the transistor 80 that is expected to occur when the base voltage of the transistor 80 is switched from the Zener voltage Vz to the analog voltage Va.

Further, in the above embodiment, the resistor 21a is replaced by the variable resistor 1.
Although the example in which the switching damper 18b is connected in series with the slider 18c has been described, instead of this, as shown in FIG.
The transistor circuit lOO connected to the switching control circuit 90 for 6 is connected to the slider 18C of the variable resistance 18b and the resistance 21
It may also be implemented by connecting it to a. In such a case, the switching control circuit 90 operates such that when the transistor 92 becomes conductive in response to a heat mode signal necessary for switching the switching damper 16 to the heat mode from the microcomputer 91, the electromagnetic switching valve 93 switches to a servo motor (not shown). The switching damper 16 is switched to the heat mode by applying negative pressure to the heat mode.

When the heat mode signal from the microcomputer 91 disappears, the transistor 92 becomes non-conductive, and the electromagnetic switching valve 93 applies atmospheric pressure to the servo motor, thereby switching the switching damper 16 to the state shown in FIG.

The transistor circuit 100 includes a pair of transistors 101.
The transistor 101 has an emitter connected to a slider 18c of a variable resistor 18b, and a collector connected to a resistor 21a. The emitter of transistor 102 is grounded, and the collector of transistor 102 is connected to the base of transistor 101. Also, this transistor 10
The cathode of a diode 103 is connected to the base of 2, and the anode of this diode 103 is connected to a resistor 105.
It is connected to the slider 18C of the variable resistor 18b via. Furthermore, the diode 104 is connected to the slider 18c of the variable resistor 18b via a resistor 105, and the cathode of the diode 104 is connected to the collector of the transistor 92.

In this modified example configured in this way, when the microcomputer 91 is not generating a heat mode signal, the transistor 92 is in a non-conductive state. For this reason,
An electromagnetic switching valve 93 applies atmospheric pressure to the servo motor to maintain the switching damper 16 in the state shown in FIG. In such a state, diode 104 is connected to transistor 9.
Since transistor 102 is reverse biased and non-conductive due to the non-conduction of diode 103, transistor 102 becomes conductive under the forward bias of diode 103 and maintains transistor 101 in a conductive state. Therefore, the blowing direction swing control device EC receives the set divided voltage from the variable resistor 18b under conduction of the transistor 101, and achieves the same effect as that of the previous embodiment.

Further, when the microcomputer 91 generates a heat mode signal, the transistor 92 becomes conductive, and the electromagnetic switching valve 9
3 applies negative pressure to the servo motor and switches the switching damper 16 to the air outlet 11a side to set the heat mode. At this time, diode 104 is forward biased due to conduction of transistor 92, making diode 103 non-conductive, so transistor 102 becomes non-conductive, and transistor 101 becomes non-conductive. Therefore, the blowing direction swing control device EC is cut off from the slider 18C of the variable resistor 18b due to the non-conduction of the transistor 101, and becomes inoperable. As described above, in this modification, when the switching damper 16 is placed in the heat mode under the control of the microcomputer 91, the swinging movement of the blowing direction swinging mechanism 13 is automatically prohibited, and the switching The structure and function are characterized by the fact that when the damper 16 enters a mode other than the heat mode, the above-described swinging motion of the blowing direction swinging mechanism 13 is automatically allowed.

Furthermore, in the embodiment described above, an example was explained in which the resistor 21a was connected to the slider 18C of the variable resistor 18b.
Alternatively, as shown in FIG. 6, if the variable resistor 18b is omitted and the resistor 21a is directly connected to the emitter of the transistor 18a, the same effects as in the previous embodiment can be achieved.

Further, in implementing the present invention, the transistor circuit 1
8 and the airflow control device 17, a manual operation circuit 110 may be employed and implemented as shown in FIG. In such a case, the manual operation circuit 110 includes three resistors 111,
112, 113 and three operation switches 114, 115
．． 116, and three resistors 111, 112,
113 are connected in series with each other and are connected between the DC motor 12a and the DC power source. Operation switch 1
14 is connected between the DC power source and the DC motor 12a. Further, the operating switch 115 is connected in parallel to the series circuit of the resistor 111 and the operating switch 114, and the operating switch 116 is connected in parallel to the series circuit of the resistor 112 and the operating switch 115. Note that the resistor 21a is connected to a common end of the DC motor 12a and the resistor 111.

Therefore, in this modified example configured in this way, when the main switch (not shown) is opened, the rotational speed of the DC motor 12a is the maximum speed (that is, the rotational speed from the fan 12b is reached when only the operation switch 114 is closed). When only the operation switch 115 is closed, the rotational speed of the DC motor 12a becomes the first medium speed (that is,
When the amount of air blown from the fan 12b becomes the first medium air amount) and only the operation switch 116 is closed, the DC motor 12
The rotational speed of the fan 12b becomes the second medium speed (that is, the air flow rate from the fan 12b is the second medium speed), and each operation switch 114
, 115 and 116, the DC motor 12a
The rotational speed of the fan 12b becomes low (that is, the amount of air blown from the fan 12b is low). In any of these states, the blowing direction swing control device EC is operated by the resistor 21a.
A power supply current is received from the DC power source through the operation circuit 110 to achieve the same effects as in the previous embodiment.

Further, even when the main switch is opened a second time after opening, the blowing direction swing control device EC achieves the same effect as in the embodiment described above. In addition, effects such as these are the 8th
As shown in the figure, the DC motor 1
2a is grounded, and each operation switch 114 to 11
The same effect can be achieved by grounding the resistor 6 and connecting the resistor 21a to the common end of the resistor 113 and the DC motor 12a.

Further, in the above embodiment, an example in which the present invention is applied to the vehicle air conditioner 10 has been described, but the present invention is not limited to this, and the present invention may be applied to various types of air conditioners.

Further, in implementing the present invention, the reference voltage generator 40
, the charging/discharging circuit 50 and the comparator 70 may be replaced with an appropriate counter circuit, timer circuit, etc. having the same functions as these circuits.

[Brief explanation of drawings]

1 and 2 are overall configuration diagrams showing an example in which the present invention is applied to a vehicle air conditioner, and FIG. 3 is a graph showing the relationship between the base voltage of the transistor 80 in FIG. 1 and time. , and FIGS. 4 to 8 are electrical circuit diagrams showing partial modifications of the present invention, respectively. Description of symbols EC...Blowout direction swing control device, M, 12a...DC motor, 10...Air conditioner, 11a...
・Air outlet, 12...Blower, 12b...Fan, 1
3... Blowing direction swing mechanism, 20... Potentiometer, 21... Variable resistance, 23... Slider, 30.8
0...Transistor, 40...Reference voltage generator, 5
0... Charge/discharge circuit, 60... Zener diode,
62... Inverter, 70... Comparator.

Claims (1)

[Claims] a first rotary electric motor that rotates when supplied with power from a power source; a blowing means that is driven by the first rotary electric motor to blow air toward the air outlet; and a second rotary electric motor that rotates when supplied with power from the power source. In the air conditioner, the air conditioner includes a rotating electric motor, and a swinging means that is driven by the second rotating electric motor and swings the blowing direction of the airflow blowing out from the air outlet, the variable air conditioner being connected to the power source. an adjusting means that has a resistor and a slider that is in sliding contact with the variable resistor, and generates an adjusted voltage from the slider at a position where the slider is in sliding contact with the variable resistor; and a clock means for generating a clock signal for a predetermined period of time from this time when power is supplied through the slider; Prohibiting and allowing means for allowing generation of the regulated voltage in response to the disappearance of the signal, generating an initial voltage in response to the generation of the timing signal, and causing the initial voltage to disappear in response to the disappearance of the timing signal. The motor is characterized by comprising an initial voltage generating means and a driving means for driving the second rotary motor at a rotational speed corresponding to the initial voltage or the adjusted voltage in response to the initial voltage or the adjusted voltage. Air blow direction swing control device for air conditioners.