JPS608110A - Air conditioner of automobile - Google Patents

Abstract

PURPOSE:To provide quick heating and prevent moisture from collecting on a side glass by mounting a heater-contained supply duct on a door so as to selectively deflect the direction of hot air from the duct to supply it to a driver or the side glass. CONSTITUTION:A supply duct 7 containing a PTC element 4 of a positive-characteristic magnetic semiconductor of barium titanic acid which is abruptly increased in resistance at a specific temperature is installed in a door and has a supply opening 25a. When mode change-over lever is turned to a ''defroster'' position to run a fan motor, the PTC element 4 is electrified and heated and air is, at the same time, sent to the duct 7. That is, heated air is blown from the supply opening 25a. The blow against the side glass or a driver is selected by a louver 26. When reaching a specified temperature, the PTC element 4 is increased in resistance so that the heat generated therefrom is reduced. Quick heating and prevention of moisture collection on the glass may be performed effectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner for an automobile, and in particular is intended to provide immediate heating for occupants and to prevent fogging on the side windows of an automobile.

Conventionally, during the few minutes when a car engine is started in winter, etc., the engine cooling water is not sufficiently warmed up, so a hot water heater that uses engine cooling water as a heat source cannot provide a heating sensation; It was necessary to provide some kind of immediate heating instead.

In addition, with conventional automobile air conditioners, the self-Il! IIvP
This system blows warm air onto the front and side windows of a car to prevent the glass from fogging up, but as mentioned above, during the few minutes when the car engine starts, such as in the winter, it is not possible to obtain enough warm air, causing the windshield to become foggy. Cloudiness could not be removed sufficiently. In particular, the side glass tends to fog up more easily than the front glass, so there was a need for a measure to prevent the side glass from fogging.

Therefore, the purpose of the present invention is to immediately achieve heating for passengers and prevention of fogging of side windows in winter, etc., and to selectively direct warm air heated by a heating element that generates heat when energized onto side windows and the driver's seat. It is configured to blow out.

The present invention will be explained below with reference to embodiments shown in the drawings.

! Figure '61 is a layout diagram showing the inside of the ventilation duct of the air conditioner of this embodiment, and 11 in Figure 1 is the ventilation duct;
Either the outside air or the inside air is selectively introduced by the inside/outside air switching damper 12, and the introduced air is sent to the blower 1.
3, the air is blown downstream. In addition, 14 in the figure is a motor for driving the blower.

A refrigerant evaporator 15 of the refrigeration cycle is disposed in the ventilation duct 11, and when the air guided by the blower 13 passes through the evaporator 15, the heat of vaporization of the refrigerant is removed and the air is cooled.

A heater 16 is installed downstream of the evaporator 15, and a bypass passage 17 is formed on the side of the heater 16 to allow air to flow without passing through the heater 1G. The flow rate of air passing through the bypass passage 17 and the flow rate of air passing through the heater 16 are adjusted by an air mix stamper I8, and then the respective air flows are mixed in a mixing chamber 19 downstream of the heater 16. Warm air is blown towards the car's windows to prevent them from fogging up. Further, 2o is an upper air outlet that blows cold air towards the occupant's head, 21 is a lower air outlet that blows warm air towards the occupant's feet, and 22 is a defroster air outlet 1- that branches off from the middle of the lower air outlet 21. It is 1. And each speech bubble 1
．． i, + 2 (+.

21 differential lj star air outlet 22 is a blowout IJ switching damper 23
．． 24.

In addition, internal air switching damper I2, air mix damper 18
a and the air outlet switching dampers 23 and 24 are installed in the vehicle interior.
The rotation speed of the air blower 1 and 13 is also controlled by a switch provided in the vehicle interior.

Figure 2 shows an outline of the present invention, and shows the outline of the invention. l! 11
On the other hand, a blower D is provided at the 1-1= portion so as to blow warm air heated by a heating element, which will be described later, toward the side glass 3 or the driver's hand holding the steering wheel 2.
25a is provided. ”2 PTC element 4 is,
It is a barium ditanate-based positive characteristic porcelain semiconductor whose resistance value increases rapidly at a specific temperature.As shown in Figure 3, it is sintered into a lattice shape and attached to member 5 in a figure 21 shape.
Slide it to store it. The holding member 5 is made of a heat-insulating material, and an electrode (not shown) is provided on the inner surface that comes into contact with the long side of the PTC element 4, and the PTC element 4 can be energized by the lead wire 6. There is. To install the PTC element 4, the member 5 is inserted through the opening 7a provided in the blow-off duct 7 disposed inside the door 71, and as shown in FIG. It is attached to the blow-off duct 7 via a heat insulating sheet 9. At this time, the contact area of the mounting member 5 with the inner wall of the blow-off duct 7 is reduced by the rib 5a installed on the side surface of the mounting member 5. One end 7 of the blowout duct 7
b is the opening/closing part of the automobile door 1, and is connected to the contact port 10a of the defroster duct 10 when the door 1 is closed, and the compangin 10c prevents air from leaking from the joint. An air outlet 10d for defrosting the front glass is provided in the middle of the defroster duct 10, and the base of the defroster duct 10 is connected to the fA described above.
It is connected to the defroster duct 22 of the ventilation duct 11 shown in FIG.

On the other hand, a resin-made blowout L1 case 25 is fitted to the other end 7c of the blowout duct 7.

A blower outlet 25a is opened on the upper surface of the 11th blower Zl case 25, and a resin louver 26 is provided at the blower outlet 25a to change the blowing direction of hot air. Louver 26
Both ends of the plate 27 are fixed to a fan-shaped resin plate 27, and a shaft 28 is provided on the side of the plate 27 facing the inner wall of the case 25, and this shaft 28 is inserted into a shaft hole (not shown) provided in the case 25. J is stuck in the sea urchin. Therefore, when the knob 27a provided on the arcuate portion of the plate 27 is switched in the direction of the arrow, the louver 26 rotates together with the plate 27, deflecting the air outlet 1fi toward the passenger.
By switching the direction, the blown air can be deflected toward the side glass 2.

FIG. 5 Il' shows an electric circuit diagram of this embodiment, in which a first relay 31 is connected to the automobile battery 29 and becomes energized by turning on the ignition sensor 30, and the first relay 3I is connected to the vehicle battery 29. is connected to the speed variable resistor 32 of the blower drive switch 14, and the motor 14 is connected to the blower switch 3.
3 to be energized. The blower switch 33 also includes an operation switch 34, a relay coil 35a of a normally open contact type second relay 35, and a defroster contact 3.
6 are sequentially connected in series. The activation switch 34 is provided on an air conditioner operation panel near the driver's seat instrument panel (not shown) and is manually operated.

The defroster contact 36 also switches the mode switching lever 37 provided on the air conditioner operation panel to the defroster mode (fifth mode).
When switched to the position indicated by the dashed line in the figure, it is grounded.

That is, when the mode switching lever 37 is in the differential lj star mode, the blower switch 33 is on, and the operation switch 34 is on, the relay coil 35a is energized.

On the other hand, the PTC heater 4 is connected to the battery 29 via the relay contact 35b of the second relay 35 at tB 1i+.

Next, the operation of this embodiment having the above configuration will be explained.

First, after turning on the ignition switch 30, move the mode switching lever 37 to the defroster position (Fig. 5 dotted position).
When switching to , the blowout 1”l switching damper 2 is linked with this.
3, 24 are the lower air outlet 1.1221 and the upper air outlet 20
is closed and only the defroster air blower 1-120 is opened.At the same time, the defroster contact 36 is grounded.

Next, when the blower switch 33 is turned on, the motor 14 rotates and the blower 13 starts blowing air. When the operating switch 34 is turned on, the relay coil 353 is energized by 3 IN,
Relay contact 35b is closed, ! ” The TC element 4 generates heat when energized. Therefore, the air blowing through the defroster duct 10 by the blower 13 is heated by the gas cooler 4 disposed in the blow-off duct 7 and becomes warm. It becomes wind and is blown out from the air outlet 1, J 25 a.

At this time, when the knob 2La is switched in the direction of the arrow on, warm air is blown out towards the passenger, and when the knob 27a is switched in the direction of the arrow B, the warm air is blown out towards the lid glass 2, preventing fishing. and defrosting becomes possible.

Next, other embodiments of the present invention will be described.

FIG. 6 shows a second embodiment, in which the Suita duct 7 is connected to the door 2.
A centrifugal multi-blade fan 40 is housed inside the scroll casing 39 and is driven by a small motor 41 for sliding. That is, the blower of this embodiment is composed of a centrifugal multi-blade fan 40 and a motor 41. A suction port 39a for air inside the vehicle is opened in the side surface of the scroll casing 39, and a wire mesh 42 for preventing foreign matter from entering is provided in the suction port 39a. The rest of the configuration is the same as that of the first embodiment, so a description thereof will be omitted.

In the above configuration, the air inside the vehicle is sucked into the scroll casing 39 through the suction port 39a, blown by the fan 40, heated by the PTC element 4, and blown out from the blow-off port 25a as warm air.

As mentioned above, the second embodiment has the fan 40 and motor 41 dedicated to the auxiliary heating device, so the differential
The star duct 10 is no longer necessary, and the container feeder 13. Evaporator 15. It has the +1 feature of being able to be used independently from the air conditioner main body which has a heater core of 1G.

In addition, in the electric circuit of the first embodiment described in "-", the water temperature pump, which is turned on and off depending on the water temperature of the automobile engine cooling fan 11, is connected in series with the operating switch 34, and the set temperature V, ■- is automatically set. I will cut off the current to ).
It's good, l) ``Cffi child 4 is mode Yu'' exchange.
14 with the activation switch 34 regardless of the f edge 3 f
It may be possible to conduct electricity by.

In addition, the blowing direction of the blowing blower 1125a in the embodiments m1 and m2 is selected from either the night glass 2 or the passenger side, but the blowing direction may be changed to blow in both directions at the same time. Needless to say.

Moreover, the above-mentioned heating element is not limited to a PTC element.

The present invention can be similarly realized by using a wire that generates heat when energized, such as a chrome wire.

As described above, the present invention provides an air outlet for housing a heating element that generates heat when energized in the automobile door, so that it provides instant heating for the occupants when starting the automobile engine in winter, prevents fogging of the side glass, and defrosts the vehicle. can be effectively realized.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and Fig. ff11 is a layout diagram showing the internal configuration of a ventilation duct of an air conditioner, Fig. 2 is a perspective view of a driver's seat portion of an automobile showing an outline of the present invention,
Fig. 3 is a schematic diagram of the first embodiment, Fig. 4 is a perspective view of the blow-off duct of the first embodiment, Fig. 5 is an electric circuit diagram of the first embodiment, and Fig. 6 is a diagram of the second embodiment. FIG. 3 is a perspective view showing the configuration. 1... Door, 7... Blowout duct, 4... Heating element,
13...Blower, 40...Centrifugal multi-blade fan, 41.
... Motor, 25a... Air outlet, 26... Louver. Representative Patent Attorney Takashi Okabe Fig. 1 [ Fig. 2 Fig. 3 Fig. 1\5, I'- 1-' Fig. 4 Fig. 6

Claims (1)

[Claims] A blow-off duct disposed in an automobile door, a heat-generating element housed inside the blow-off duct and generating heat when energized, a blower blowing air toward the heat-generating element through the blow-off duct, and the heat-generating element. A blower outlet is provided at the tip of the blower duct to blow out heated air, and the blower outlet is rotatable so that the direction of the air blown from the blower outlet can be selected toward the side glass and driver's seat of the automobile. An air conditioner for an automobile, characterized by comprising a freely provided louver.