JPS60139518A - Air conditioning system for automobile - Google Patents

Abstract

PURPOSE:To eliminate the effect of distribution of air volume to a front seat even if the distribution of air volume to a rear seat is increased by providing a means for controlling a rotation number to increase the rotation number of a main blower in response to the starting of operation in a rear blower or to increasing of its rotation number. CONSTITUTION:A main blower 4 is started by a switch 9 and its load circuit is composed of resistances 10A, 11A and 13A in air volume control resistors 10, 11 and 13. A rear blower 7 is started by a switch 14 and is connected to the earth through the resistance 15A in an air volume control resistor 15. And a switch 17 is connected to a terminal 13B by electrifying a relay coil 12a for switching a main blower resistor value. In order to increase the air volume in the rear blower 7, when the resistance 15A in the resistor 15 for controlling the rear blower air volume is moved to the direction of an arrow 21, the resistance 11A is also reduced in synchronization with this, and the load circuit for the main blower 4 is set in a route composed of the switch 9, the resistances 10A, 11A and the switch 17. As a result, the rotation number of the main blower 4 is increased, the air volume is increased, and it is possible to eliminate the effect to a front seat.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner for an automobile. This is used in the field of air conditioners where the air conditioning unit is equipped with a rear blower that helps distribute air to the rear seats in addition to the main blower.

[Prior art]

2. Description of the Related Art There is an air conditioning air distribution device described in Japanese Utility Model Publication No. 58-28884 as an air conditioner for an automobile in which an air conditioning unit that functions as an evaporator for cooling and a heater for heating is provided with a blower for air distribution. This is because the air distribution duct is branched downstream of the blower into front and rear seats, and consideration has been given to the placement of each duct, making it possible to distribute the air throughout the vehicle.

Air can be distributed to desired locations. By the way, some cars have a rear blower interposed in the rear seat air distribution duct in order to not only distribute the air from the main blower to the front and rear seats, but also actively encourage air distribution to the rear seats. . In such a case, the main blower is always in operation during air conditioning, but the rear blower is operated or its rotation speed is changed as necessary.

Of course, since the rotation speed of the main blower can also be changed, an increase or decrease in the rotation speed of each blower is commanded regardless of the rotation speed of the other blower. Therefore, when the rear blower starts rotating or increases its rotation speed, the amount of air distributed to the rear seats increases compared to when relying only on the main blower, but the rotation speed of the main blower is maintained. Therefore, the amount of air distributed to the front seats will be reduced. As a result, when the rotational speed of the main blower is increased in an attempt to increase the amount of air distributed to the front seats, the amount of air distributed to the rear seats via the rear blower becomes larger than desired; If the front seat is stopped, the amount of air distributed to the front seats becomes larger than desired, and there is a problem in that adjusting the amount of air distribution requires time and effort.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems, and its purpose is to increase the rotation speed of the main blower accordingly when the rear blower starts operating or increases its rotation speed, thereby discharging the air to the front and seats. To provide an air conditioner for an automobile that can prevent the amount of air distribution from being affected by the rotation of a rear blower.

[Structure of the invention]

The features of the present invention are as follows. An air conditioning unit having a main blower is provided with a rear seat air distribution duct that branches from the downstream side of the main blower, and a rear blower is interposed in the duct. This is an air conditioner for an automobile that is provided with a rotation speed control means for increasing the rotation speed of the vehicle.

[Imperial example]

Embodiments will be described below with reference to drawings.

FIG. 1 is an overall system diagram of an air conditioner for an automobile according to the present invention, in which an air conditioning unit 1 is equipped with an evaporator 2 for cooling and a heater 3 for heating. And air conditioning unit 1
A main blower 4 for passing air is provided,
A front seat air distribution duct 5 and a rear seat air distribution duct 6 branched from the unit 1 are provided downstream thereof. A rear blower 7 is interposed in the rear seat air distribution duct 6, and a rotation speed control means 8 is provided to increase the rotation speed of the main blower 4 in accordance with the start of operation of the rear blower 7 and an increase in its rotation speed. There is. In this rotation speed control means 8, a resistor 10A of a main blower air volume control register 10, which is a variable resistor, is connected in series to a main blower switch 9 that starts the operation of the main blower 4, and the slider 10a is connected in series with the main blower switch 9 that starts the operation of the main blower 4. It is connected to one terminal 13A of a main blower register value switching relay 12 via a resistor 11A of two main blower air volume control registers 11. On the other hand, the rear blower switch 14 that starts the operation of the rear blower 7 is the excitation coil 12a of the main blower register value switching relay 12.
The resistor 15A of the rear blower air volume control register 15, which is a variable resistor, is connected to
is connected.

The slider 15a is integrated with the slider 11a of the main blower air volume control register 11 described above to constitute the rear blower air volume control controller 16, and the slider 11a is used to switch the main blower register value, terminal 1j of
Connected to B.

Note that the switch 17 in the main blower register value switching relay 12 connects the terminal 13A when the coil 12a is not in the excited state, and connects the terminal 13B when the coil 12a is in the excited state.

According to the air conditioner having such a configuration, it can be operated as follows. Currently, the rear blower switch 14 is not connected, the coil 12a is not excited in the main blower register value switching relay 12, and the switch 17 is not connected.
is connected to terminal 13A. Therefore, the energization circuit of the main blower 4 includes the main blower switch 9, a part of the resistor 10A of the main blower air volume control register 10, its slider 10a, and all of the resistor 11A of the other main blower air volume control register 11. It is formed by the switch 17 of the main blower register value switching relay 12. Therefore, when an air conditioning command is issued, the main blower switch 9 is connected, power is supplied from the power supply 18 to the energizing circuit of the main blower 4, and the main blower 4 controls the air volume specified by the main blower air volume control register 10. Rotate to occur. In addition, the rotation at that time is
Resistance 10A in main blower air volume control register lO
This is carried out by a current determined by the sum of a part of and the total resistance value of the resistor 11A of the other main blower air volume control register 11. Therefore, when the slider 10a of the main blower air volume control register 10 is moved, for example, in the direction of the arrow 19 and its resistance value is increased, the rotation speed of the main blower 4 is decreased accordingly, and the front seat air distribution duct 5 is moved. And the amount of air distributed from the rear seat air distribution duct 6 to the front seats and the rear seats is equally reduced. In this state, if the driver wishes to increase only the amount of air distributed to the rear seats, the rear blower switch 14 is turned on. A part of the resistor 15A of the rear blower air volume control register 15 and its slider 15a are attached to the energizing circuit of the rear blower 7, and are formed on one side of the rear blower air volume control controller 16.
The rotation is performed by a current determined by a portion of the resistance 15A in the rear blower air volume control register 15.

At this time, due to the connection of the rear blower switch 14, the coil 12a of the main blower register value switching relay 12 is
Excited by the power from the power source 20, the switch 17
is connected to the terminal 13B as shown by the imaginary line. Therefore, the energization circuit of the main blower 4 includes the main blower switch 9 and the resistor 10 of the main blower air volume control register 10.
A part of the slider 10a1, a part of the resistor 11A of the other main blower air volume control register 11, the slider 11a of the rear blower air volume control controller 16, and the switch 17 of the main blower register value switching relay 12. That will happen. Then, the rotation of the main blower 4 is controlled by the resistance 10 of the main blower air volume control registers 10 and 11.
The current is determined by the sum of parts of A and IIA. As a result, the resistance in the energizing circuit of the main blower 4 becomes smaller than before the rear blower switch 14 is connected, so that the rotation speed of the main blower 4 increases.

Therefore, even if the amount of air distributed from the rear seat air distribution duct 6 increases due to the start of operation of the rear blower 7, the overall amount of air distributed by the main blower 4 increases, and as a result, the air is supplied from the front seat air distribution duct 5. The amount of air distributed to the front seats will not be reduced. While the rear blower 7 is rotating in this manner, the slider 15a of the rear blower air volume control controller 16 is further adjusted in the rear blower air volume control register 15.
For example, if the resistance value is decreased by moving in the direction of arrow 21, the rotation speed of the rear blower 7 increases accordingly,
The amount of air distributed from the rear seat air distribution duct 6 to the rear seats can be increased. At this time, the resistance 11A of the main blower air volume control register 11 is also reduced by the slider 11a of the rear blower air volume control controller 16, and the main blower 4
The number of revolutions increases, and the amount of air distributed from the front seat air distribution duct 5 to the front seats also increases. In this way, when the rear blower air volume control controller 16 increases or decreases the resistance of the rear blower air volume control register 15, it also increases or decreases the resistance of the main blower air volume control register 11. 4 can also be increased, and the amount of air distributed to the front seats can be changed in proportion to the amount of air distributed to the rear seats. Therefore, in adjusting the desired air distribution amount, it is not necessary to operate the main blower system by simply operating the rear blower switch, and there is no need to operate the main blower when increasing the rotation speed of the rear blower.

〔Effect of the invention〕

The present invention has a rear blower interposed in a rear seat air distribution duct I branched from the downstream of the main blower, and the rotation speed of the main blower is increased in response to the start of operation of the rear blower and an increase in its rotation speed. Since the control means is provided, the operation of the main blower can be adjusted depending on whether or not the rear blower is operated and the degree of operation. the result,
Even if the amount of air distributed to the rear seats increases, the amount of air distributed to the front seats is not affected, and desired air conditioning can be applied to desired locations. Further, the operation for this purpose can be realized only by normal operations such as operating a rear blower switch or operating a rear blower air volume control register.

[Brief explanation of the drawing]

FIG. 1 is an overall system diagram of an air conditioner for an automobile, which is an embodiment of the present invention. 1- Air conditioning unit, 4- Main blower, 6- Rear seat air distribution duct, 7- Rear blower, 8- Rotation speed control means patent applicant Toyo Kogyo Co., Ltd.

Claims (1)

[Claims] (1) An air conditioning unit having a main blower is provided with a rear seat air distribution duct that branches from the downstream side of the main blower,
An air conditioner for an automobile, characterized in that a rear blower is interposed in the duct, and rotation speed control means is provided for increasing the rotation speed of the main blower in accordance with the start of operation of the rear blower or an increase in its rotation speed. .