JPS61108008A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To freely change a rise time of the amount of air blown into a compartment, by providing a control means in a fan control circuit, which means is interlocked with an air conditioning switch to gradually change a fan speed from 0 to a predetermined speed. CONSTITUTION:An operational amplifier circuit 19 connected with an air conditioning switch 16 is additionally provided in a fan control circuit. At the same time an ignition switch 15 is turned on, and the air conditioning switch 16 is turned on, current flows in a direction depicted by an arrow to operate the operational amplifier circuit 19. An input voltage V0 is added to a non-inversion input side, and negative feedback is conducted with a resistor R1 (voltage to be added to the resistor R1 is gradually increased) to thereby gradually increase the amount of air from 0. Accordingly, the amount of air approaches to an ordinary amount of air controlled by a fan controller 22 as time is elapsed. In other words, it is possible to freely change a rise time of the amount of air blown into a compartment by making the resistance of the resistor R1 variable.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a vehicle air conditioner such as a car, truck, or pass air conditioner equipped with a control means that can freely control the start-up time of the air volume. It is related to the device.

[Conventional technology]

FIG. 3 is a diagram showing the configuration of a conventional manual vehicle air conditioning system. In FIG. 3, air flows through a blower 1, a cooling device 2, and a heater device 3 as indicated by the arrow marks. The blower 1 is the power supply 14 and the ignition switch 15
By closing and applying voltage, the fan control switch 13 in the room 5 is turned 0FF via the register 2.
-L@M@HK air volume is controlled. Cooling device 2
When the air conditioner switch 16 and cooling system control thermostat 17 are activated via the fan control switch 13 (17' is the heat sensitive part of the thermostat), the magnetic clutch 7 is energized and the engine (not shown) is activated. Accordingly, the compressor 6 is driven.

The cooling device 2 includes a refrigerant circuit including a compressor 6, a condenser 8, a receiver 9, an expansion valve 10, and an evaporator 1. The air cooled by the cooling device 2 is appropriately reheated by the heater by the operation of the air mixer 4'-4, and is blown out into the room 5 through the duct 18 at an appropriate temperature.

[Problem that the invention seeks to solve]

However, in this type of air conditioning system, immediately after parking for a long time on a day with strong sunlight in the mid-season (spring/autumn) or summer (summer), when the air conditioner switch 16 is turned on and the fan control switch I3 is turned on, the duct The fever in 18 is 9,
There is a drawback that the hot air is blown into the room 5 and hits the human body, making it extremely uncomfortable.

The present invention was proposed in order to solve the above-mentioned conventional problems, and provides an air conditioner for electric pictures that can freely change the rise time of the air volume blown into the room and keep the room in a comfortable condition at all times. The purpose is to

[Failure to solve the problem]

The vehicle air conditioner according to the present invention is characterized in that the fan control circuit is provided with a control means that gradually changes the fan speed from O to a predetermined speed in conjunction with the air conditioner switch.

[Effect]

According to the present invention, for example, an O
A P (operational amplifier) circuit 19 is added to the circuit, and the input voltage V is set at the same time as the air conditioner switch 16 is turned on. is added to the non-inverting input side, and negative feedback is provided to this using R1 (resistance) (
By gradually increasing the voltage applied to the resistor R, the air volume is turned on.
'/h gradually increases, and the L- of register 12 increases with time.
The air volume is fixed at M-H, so that even if the air conditioner switch I6 is turned on after parking for a long time, the heat inside the duct will not be blown out, and the air cooled by the cooling device 2 will gradually reach the human body. In this way, the above-mentioned conventional problems can be solved.

〔Example〕

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a diagram showing the configuration of one embodiment of the present invention.
In the figure, the same reference numerals as in FIG. 3 indicate the same parts as in FIG. is the steady state fan controller.

The operation of the above embodiment of the present invention will be explained. In FIG. 1, by turning on the ignition switch 15 and applying voltage from the power supply 14 to the circuit, an A/N circuit 19 is added to O connected to the air conditioner switch 16 in the conventional fan control circuit, and the air conditioner switch is switched on. At the same time as turning on the nozzle, the voltage flows in the direction of the → mark, the operational amplifier circuit 19 is activated, and the input voltage vo is applied to the non-inverting input side, which is negatively fed back by the resistor R1, and the air volume is gradually increased from 0. The speed of the fan is automatically controlled by the operational amplifier, and as time passes, it approaches the air volume of LMH of the fan controller 22 during steady state.

The phenomenon is shown in FIG.

Note that 16' is a contact point of the air conditioner switch 16.

〔Effect of the invention〕

As described above, according to the present invention, by making the magnitude of the resistor R8 variable, for example, it is possible to freely change the rise time of the air volume blown into the room. Even if you turn on the fan control switch 13 after parking for an hour, the hot air in the duct 18 will not suddenly blow out into the room, and the air volume will gradually increase from zero to keep the room in a comfortable state at all times. It is possible to achieve excellent effects such as:

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing changes in air volume in the embodiment shown in FIG.
The figure shows the configuration of a conventional example. 13... Fan control switch, 16... Air conditioner switch, 19... Operational amplifier circuit, 21...
-Fan controller, 22... Fan controller during steady state, RI... Resistance. Applicant's Sub-Attorney Patent Attorney Suzue Takehikomon Section I ~ Kuzu 4 Eng Σ - Tozeya 6 Kura) -

Claims (1)

[Claims] A vehicle air conditioner characterized in that a fan control circuit is provided with a control means that is linked to an air conditioner switch and gradually changes the fan speed from 0 to a predetermined speed.