JPS6140564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dual type air conditioner equipped with two main and sub air conditioning units for a vehicle such as an automobile.

For example, a vehicle has a main air conditioning unit that has a fan, an evaporator, and a heater core at the front and adjusts the temperature of the air outlet depending on the opening degree of the air mixer door, and a rear cooling unit that has a fan and evaporator as a sub air conditioning unit at the rear. Some vehicles are equipped with dual-type air conditioners.

By the way, in conventional vehicle air conditioners of this type, as shown in Japanese Utility Model Publication No. 50-21713, the volume of air blown from the rear cooling unit is controlled completely in conjunction with the control of the volume of air blown from the main air conditioning unit. Or, as shown in the ``Toyota Genuine Car Air Conditioner, Dual Air Conditioner Installation Instructions'' published on November 20, 1976, there is a rear fan switch in the rear seat that allows you to manually select the airflow volume of the rear cooling unit. The airflow rate was controlled independently from the main air conditioning unit.

However, in the former case, it is inconvenient for the rear seat occupants to have no freedom to select the airflow volume, and in the latter case, when they want to operate the main and auxiliary air conditioning units for rapid cooling, they have to switch on the rear seat fan switch. When the rear cooling unit is switched to low speed or off, and there are no passengers in the rear seats, the air volume of the rear cooling unit cannot be maximized, resulting in the inconvenience that sufficient cooling effect cannot be achieved. . Furthermore, in the latter case, if the sub air conditioning unit also has a heater core, a similar problem will occur when rapid heating is desired.

This invention has been made in view of the above points, and in a normal state, the air volume of the sub air conditioning unit can be selected independently from the main air conditioning unit, and the air mix door of the main air conditioning unit is set to the full cool position or the full hot position. To solve the above-mentioned inconvenience in a dual-type vehicle air conditioner by setting the air volume of the sub-air conditioning unit to the maximum air volume regardless of the selected position when the air conditioner rotates, that is, when rapid cooling or rapid heating is required. The purpose is to

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a circuit diagram showing one embodiment of the present invention. In the figure, 1 is the fan motor of the rear cooling unit as a sub-air conditioning unit installed at the rear of the passenger compartment, and 2 is the rear fan switch for selecting the air volume: large H, medium M, small L, or to stop the air blowing OFF. For example, it is provided at the rear of the floor console or the front seat back. 3
is the power source. There is a resistance between the fan motor 1 and the low contact L of the rear fan switch 2.
Insert R ₁ and R ₂ in series, and connect point a and high contact H,
Point b and middle contact M are connected, and the movable contact 2a of the rear fan switch 2 is grounded. In the air volume control circuit of the rear cooling unit configured as described above, when the rear fan switch 2 is switched to the high contact H, the amount of power supplied to the fan motor 1 is maximized and the fan motor 1 rotates at the highest speed.
The air volume is maximum. When switching to middle contact M, the amount of power supplied to fan motor 1 is reduced by the voltage drop of resistor R ₁ , and the air volume becomes medium, and when switching to low contact L, the amount of power supplied to fan motor 1 is reduced by the voltage drop of resistor R ₁ and resistor R ₂ . The amount of airflow decreases by the same amount, and the air volume becomes the minimum. Note that when the off contact is switched to OFF, the power supply to the fan motor 1 is cut off and the air blowing is stopped.

Further, according to the present invention, reference numeral 4 indicates a power supply to the fan motor 1 in order to maximize the air volume of the rear cooling unit regardless of the selected position of the rear fan switch 2 when the air mix door of the main air conditioning unit is rotated to the full cool position. This is a normally open switch that forms a switch circuit that maximizes the amount of power supplied. This switch 4 is a micro switch installed near the heater core 7 in the main air conditioning unit 5, as shown in FIG. When the air mix door 6 whose rotation is controlled by the user and the power servo rotates to the full cool position shown by the imaginary line, the operating piece 4a is pressed and turned on. In FIG. 2, 8 is an evaporator, 9 is a fan motor for rotating the fan 9a, and the position of the air mix door 6 shown by the broken line indicates the full hot position.

This switch 4 may be arranged so that it closes when the air mix door 6 rotates to the full cool position, so it is not limited to the example shown in FIG.
In the case of an automatic air conditioner, it may be operated by a member interlocked with the operating rod of a power servo. Also, switch 4 can be used as a relay contact,
An electronic switch may also be used.

When the air volume control circuit of the rear cooling unit is configured as described above, when the aforementioned occupant operates the main air conditioning unit in the maximum cooling state, the air mix door 6 rotates to the full cool position shown by the imaginary line in Fig. 2. However, since the switch 4 is turned on, the amount of power supplied to the fan motor 1 becomes maximum regardless of the selected position of the rear fan switch 2, and the rear cooling unit is also operated at the maximum air volume. Therefore, rapid cooling can be performed effectively.

Next, this invention was applied to an air volume control circuit for a dual-type air conditioner that can control the air volume of the rear cooling unit not only manually but also automatically in conjunction with the position of the air mix door of the main air conditioning unit. An embodiment to which this is applied will be described with reference to FIG.

In Fig. 3, 9 is the fan motor of the main air conditioning unit, 10 is a large number of fixed contacts 11 to 17 corresponding to each control stage, a common fixed contact 18, and the opening degree of the air mix door 6 of the main air conditioning unit (see Fig. 2). a slide switch consisting of a movable contact 19 that automatically slides as shown by the arrow in response to be. Resistors R ₆ , R ₇ , and R ₈ are connected in series with the fan motor 9, and each point c to f is connected to the slide switch 10.
are connected to the fixed contacts 11 to 17 and the front fan switch 20 as shown. These parts constitute the air volume control circuit of the main air conditioning unit.

On the other hand, 21 is a slide switch that is switched along with the slide switch 10 according to the opening degree of the air mix door 6 of the main air conditioning unit, and has fixed contacts 22 to 21.
25, a common fixed contact 26, and a movable contact 27 that moves together with the movable contact 19. In addition, the fixed contact 25
is the movable contact 27 at the full hot position of the air mix door 6 (the position indicated by the broken line in FIG. 2).
It extends to the sliding position. Then, a resistor is connected in series with fan motor 1 of the rear cooling unit.
R ₃ , R ₄ and R ₅ are connected, and each point g to j is connected to each fixed contact of the slide switch 21 and the rear fan switch 2' as shown. These parts constitute an air volume control circuit for the rear seat sub-air conditioning unit. Note that the rear fan switch 2' is also provided with a fixed contact for selecting automatic A, and the common fixed contact 26 of the slide switch 21
It is connected to the.

In such an air volume control circuit, when both fan switches 2' or 20 are switched to automatic A, both slides move in conjunction with the rotation of the air mix door from the full cool position (F/C) to the full hot position (F/H). Movable contacts 19, 2 of switches 10, 21
7 switches to a fixed contact corresponding to its rotational position, and a resistor that is automatically switched accordingly is inserted in series with the fan motor 1 or 9, and the amount of power supplied to it changes in stages, thereby causing the fan motor to By changing the rotation speed of 1 or 9, the blowing air volume is automatically adjusted.

In addition, in automatic air conditioners, the air mix door is opened via the transducer and power servo using a signal from the auto amplifier that is output according to the difference between the temperature detected by the room temperature sensor and the temperature set by the template lever. The degree is adjusted, and the slide switches 10, 21
The movable contacts 19 and 27 are also slid to adjust the air volume. Also, set the fan switch 2' or 20 to the large H position for manual air volume adjustment.
When switching to medium M or small L, the air volume of the rear cooling unit or the main air conditioning unit is adjusted, respectively, similarly to the embodiment shown in FIG.

Now, in FIG. 3, reference numeral 28 is a fixed contact provided so as to come into contact with the movable contact 27 when it slides to a position corresponding to the full cool position (F/C) of the air mix door, and is grounded. The fixed contact 28 and the movable contact 27 are used to maximize the air volume of the rear cooling unit when the air mix door is rotated to the full cool position (F/C) regardless of the selected position of the rear fan switch 2'. A switch circuit is configured to maximize the amount of power supplied to the fan motor 1.

In addition, slide switch 1 on the main air conditioning unit side
The fixed contact 29 is also grounded as shown by the imaginary line at 0.
By providing this, the fan motor 9 can be rotated at the highest speed to perform rapid cooling even when the front fan switch 20 remains in a mode other than automatic A.

Furthermore, although both embodiments have been described with reference to a rear cooling unit as a sub-air conditioning unit, the present invention can also be applied to a sub-air conditioning unit that also has a heater core. In that case, a switch that turns on when the air mix door is rotated to the full hot position (F/H) is provided in parallel with switch 4 in FIG. A grounded fixed contact 30 may be provided.

As described above in connection with the embodiments, according to the present invention, the air volume of the sub air conditioning unit can normally be freely selected, and the sub air conditioning unit is operated only when the main air conditioning unit is in the maximum cooling (or heating) state. The maximum air volume is automatically set regardless of the selected position of the fan switch, allowing for flexibility in selecting the air volume of the sub-air conditioning unit while effectively providing rapid cooling (or heating) as needed. I can do it,
A dual-type air conditioner can always be used effectively.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram of the rotating position of the air mix door and the mounting position of the normally open switch in the main air conditioning unit, and Fig. 3 is another embodiment of the invention. FIG. 1, 9...Fan motor, 2, 2'...Rear
Fan switch, 3... Power supply, 4... Normally open switch, 5... Main air conditioning unit, 6... Air mix door, 7... Heater core, 8... Evaporator,
10, 21...Slide switch, 20...Front fan switch, 28, 29, 30...Grounded fixed contact, _R1 to _R8 ...Resistor.

Claims (1)

[Claims] 1 In a dual-type air conditioner that has main and sub air conditioning units at the front and rear of the vehicle, a fan switch and air volume control circuit are provided to manually select the air volume blown by the sub air conditioning unit, and the main A switch circuit that automatically maximizes the amount of power supplied to the fan motor of the auxiliary air conditioning unit when the air mix door of the air conditioning unit is rotated to the full cool position or the full hot position, regardless of the selected position of the fan switch of the auxiliary air conditioning unit. A vehicle air conditioner characterized by being provided with.