JPH0248214A - Air-conditioner for vehicle - Google Patents

Abstract

PURPOSE:To improve comfortableness by a method wherein if temperature in a vehicle interior is lower than the specified value at the time of starting heater operation, the amount of blown air is controlled for a specified time irrespective of the specified amount so that cool air remaining in a duct can be gradually exhausted. CONSTITUTION:When a heater is operated, each damper is specified at an optional position and a blower switch 17 is set to a desired amount of blown air and turned on. A controller 15, receiving a signal of the blower switch 17, drives a blower motor 3 only when the switching position is L to have a fan 2 rotated. If the blower switch 17 is set to M or H and temperature detected by a temperature sensor 16 is lower than the specified value, 10 deg.C for example, the controller 15 operates the blower motor 3 at low level for a specified period, 5 seconds for example. This permits cool air in a duct to be gradually exhausted so that uncomfortableness that cool air is blown rapidly can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vehicle air conditioner, and particularly relates to an improvement in a control method at the start of heating operation.

(Prior art) A vehicle air conditioner is equipped with a heater core and a blower motor into which a fan is fitted, and the blower motor is energized to drive the fan to rotate, thereby conducting outside air or inside air, which is air inside the vehicle, to the heater core. , which exchanges heat and leads it to the passenger compartment. That is, a heating effect is possible. Adjustment of the amount of heat from the heater core, adjustment of the air volume of the fan, switching settings between internal air circulation and outside air intake, etc. can be controlled by dedicated operation levers provided on the instrument panel. Further, the pro-armotor and heater core are housed in a main body duct disposed on the back side of the instrument panel. This body duct also has other internal parts.

A damper for switching outside air intake and a plurality of dampers for each blowout position are provided, and these can also be switched using a control lever provided on the instrument panel.

(Problem to be Solved by the Invention) By the way, in order to start heating operation in such an apparatus, the proa switch is turned on as shown in FIG. 3. The airflow rate of the fan is controlled by the adjustment position of the changeover switch. That is, in the order of the blowout air volume, for example, rL,
It is possible to switch between M and HJ.

However, before the heating operation starts, the main body duct is filled with cold air, and when the operation starts, the cold air is blown into the passenger compartment at the set blowout air volume. If the blowing direction at this time is set toward the occupant's face, as in the case of a "ventilator," naturally, the cold air will be blown toward the occupant's face, causing discomfort. This condition continued until the cold air in the main body duct completely disappeared, giving a so-called bad feeling.

The present invention has been made in view of the above-mentioned circumstances, and eliminates the discomfort caused by the cold air accumulated in the main body duct being blown out at the set air volume at the start of heating operation. When the cabin temperature is below a predetermined temperature, the air volume is suppressed for a predetermined period of time regardless of the set air volume, and cold air is gradually discharged from the main body duct, making it possible to control the vehicle without causing discomfort to the occupants. The purpose is to provide air conditioning equipment for

[Structure of the invention]

(Means and Effects for Solving the Problems) The present invention detects the cabin temperature and sends a signal to the controller at the start of heating operation, and when the cabin temperature is below a predetermined temperature, the controller detects the passenger compartment temperature. The fan motor is rotated at a low speed for a predetermined period of time regardless of the specified set air volume to gradually discharge the cold air accumulated in the main body duct, and after the predetermined time has elapsed, the fan motor is controlled to return to the specified set air volume and rotate. This is a vehicle air conditioner characterized by the following.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a schematic configuration of a vehicle air conditioner. In the figure, reference numeral 1 denotes a main body duct, and in one end of this main body duct 1, a propeller motor 3 having a fan 2 fitted onto a rotating shaft is housed.

Furthermore, a heater core 4 is disposed at a position spaced apart from the pro-armotor 3. On the suction side of the fan 2, there is an outside air inlet 5 facing the outside of the vehicle and an inlet 6 facing the passenger compartment.
are open and can be relatively opened and closed by the first damper 7. This first damper 7 can be switched by, for example, an rREC lever, which is provided protruding from the instrument panel. Above heater core 4
A second damper 8 is pivotally mounted nearby, and guides the air introduced into the main body duct 1 from the outside air intake port 5 or the vehicle interior intake port 6 so that it passes through the heater core 4 or not. It is now possible to do so.

This can be adjusted using, for example, a balance control lever that protrudes from the instrument panel.

Furthermore, openings 12 to 14 are provided on the other end side of the main body duct 1, which is the outlet side of the fan 2, and are opened and closed by third to fifth dampers 9 to 11. The opening 12 opened and closed by the third damper 9 is a so-called "defroster" that opens facing the windshield (not shown), and the opening 13 opened and closed by the fourth damper 10 faces the passenger's face. The opening 14 is a so-called "ventilator" that opens, and the opening 14 that is opened and closed by the fifth damper 11 is a so-called "foot heater" that opens toward the feet of the occupant. The above pro motor 3 is the controller 15
The drive voltage Vd is controlled by the drive voltage Vd. This change in drive voltage Vd is, in other words, a change in the rotation speed of the fan 2, which results in a change in air volume. A temperature sensor 16, which is arranged in the vehicle interior and detects the temperature of the vehicle interior and sends a detection signal, is electrically connected to the controller 15. Furthermore, a proa switch 17 is electrically connected to the controller 15. That is, this pro-a switch 17 is provided protruding from the instrument panel and is used by the passenger to switch the air volume.

The most common position is H. It has contacts 17a to 17c corresponding to these positions. .

Therefore, when performing heating operation, each damper is set to an arbitrary position, and then the proer switch 17 is set to a desired air volume position and turned on. The controller 15 receives a signal from the proa switch 17, and the switching position is set to r.
Only in the case of LJ, the pro-armotor 3 is energized to rotate the fan 2, and heating operation is started regardless of the cabin temperature or the outside temperature.

If the outside temperature is particularly low, even if the rREC lever
Even if it is set to the internal air circulation position, the cold air accumulated in the main body duct 1 will be blown out from the desired opening, but since the amount of air blown out is extremely small, it will have almost no effect on the occupants.

In addition, when heating operation is started by setting the proa switch 17 to "M or H", the controller 15
receives the temperature signal detected by the temperature sensor 16, and the cabin temperature is 1.
It is determined whether the temperature is below 0'C.

If the temperature is above this temperature, it is determined that there is no cold air accumulated in the main body duct 1, and the fan 2 is driven with the above-mentioned proa switch 17 kept at the set position to start heating operation.

Further, when the cabin temperature is 10'C or less, the controller 15 sets the blower motor 3 to Low for 5 seconds.
Instruct them to drive. Therefore, the extremely low temperature cold air accumulated in the main body duct 1 is gradually discharged from the desired opening, and the cold air in the main body duct 1 disappears at all within this operating time.

At this time, the cold air is discharged very slowly and only for a short time, so even if the blowout position is set to the "ventilator" position, the occupants will hardly be affected by the cold air blowout. When this operating time ends, the controller 15 controls the proar switch 17 to operate at the set position. In other words, it performs a normal heating effect.

〔Effect of the invention〕

As explained above, according to the present invention, when the heating operation is started, the blower motor is rotated at a low speed for a predetermined period of time when the cabin temperature is below a predetermined temperature to gradually discharge the cold air accumulated in the main body duct. This has the effect of providing comfortable heating without causing discomfort to the occupants at the start of heating operation.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a vehicle air conditioner, FIG. 2 is a flowchart at the start of heating operation, and FIG. 3 is a conventional example of the present invention. It is a flowchart figure at the time of a heating operation start showing an example. DESCRIPTION OF SYMBOLS 1... Body duct, 2... Fan, 3... Blower motor, 4... Heater core, 15... Controller, 16... Temperature sensor, 17... Proa switch. Applicant's agent Patent attorney Takehiko Suzue Figure 2

Claims (1)

[Claims] At the start of heating operation, the cabin temperature is detected, and when the cabin temperature is below a predetermined temperature, the blower motor is rotated at low speed for a predetermined period of time regardless of the set air volume instructed by the passenger, and the cold air accumulated in the main body duct is gradually removed from the main body duct. 1. A vehicle air conditioner comprising: a controller that controls a blower motor to return to a specified set air volume and rotate after a predetermined period of time has elapsed.