JPS58128917A - Air-conditioning apparatus for automobile - Google Patents

Abstract

PURPOSE:To prevent the occurrence of a feeling of physical disorder due to temperature changes, in an air-conditioning system in an automobile, by gradually operating a vent door or a floor door when those are operated to open or close in association with a mix door so that the volume of air distribution is gradually changed. CONSTITUTION:The operating condition of a power servo 43 for controlling the opening and closing of a mix door 50 is detected by means of a detector 44, and is delivered to a control circuit 45 which in turn transmits a signal to a transducer 46 for adjusting the actuating amount and speed of a negative pressure actuator 47 which operates a vent door 64 and a front door 64. Further, the negative pressure actuator 47 is linked to the vent door 64 and the front door 63 through a link mechanism 48. Accordingly, the negative pressure actuator 47 gradually displaces the vent door 64 and the front door 63 upon chage from the vent mode to the bi-level mode or vice-versa by opening and closing the mix door 50, thereby the temperature change of a blow-off port is gently made when mode switching is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air peace system for an automobile, which controls a door for controlling air distribution, such as a vent door, in conjunction with a mix door.

An example of an air conditioner for an automobile is shown in FIG. is fan 20
is sent to the evaporator 30 by. Evaporator 3
0 is connected to a pipe 31 for sending refrigerant, and the pipe 30 is provided with a valve 32 for adjusting the amount of refrigerant sent to the evaporator.

Reference numeral 40 denotes a heater core, which is heated when air passes through it.A vibrator 41 for supplying hot water is connected to the heater core 40, and a valve 42 for regulating the amount of hot water sent to the heater core 40 is provided on the vibrator 41. As hot water,
Generally, engine cooling water is used. An air mix door 50 is provided between the evaporator 30 and the heater core 40.

The mix door 50 adjusts the amount of air passing through the heater core 40 and the amount of air not passing through the heater core 40, and mixes the two to adjust the temperature of the air flowing out into the vehicle interior. When the mix door 50 is opened 100%, that is, at the H position in FIG. 1, all of the air that has passed through the evaporator 30 passes through the heater core 40. On the other hand, when the opening degree of the mix door 50 is 0%, that is, at the V position in FIG. 1, all of the wind that has passed through the evaporator 30 does not pass through the heater core 40 and reaches the vehicle interior. Therefore, the relationship between the opening position of the mix door 50 and the concentration of the entire air discharged into the vehicle interior is as shown in FIG. By opening the heater core 40, the temperature of the air passing through the heater core 40 increases, and when the mix door 50 is fully open, the temperature of the air is at its highest.

The vent duct 62 is for discharging air from the instrument panel into the vehicle interior, and a vent door 64 is provided to control the opening and closing of the vent duct 62. The floor duct 61 is for discharging air from the instrument panel into the passenger compartment. A floor door 63 is provided to control the opening and closing of the discharge.

These doors 63 and 64 in the automatic air conditioner operate in conjunction with the opening degree of the mix door 50, as shown in FIG. That is, each sensor detects the inside air temperature and outside air temperature, compares these temperatures with the temperature set by the passenger, and sends a control signal to the transducer that controls the supply of negative pressure to the power servo. ing.

Then, the mix door attached to the power servo is automatically opened and closed, and a door such as a vent door that controls air distribution into the vehicle interior is opened and closed in accordance with the opening degree of the mix door. For example, when the mix door 5o is opened from the fully closed state V to a predetermined position, the vent door 64 opens the vent duct 62 (position C), and the floor door 63
is closed! It (position D), that is, the vent mode is set, and when the mix door 50 is in the middle area, the vent door 64 and the floor door 63 are in the middle position! (
B position and F position), cold air flows out from the vent duct and warm air flows out from the floor duct. In other words, it is a pie level mode to keep your head cold and feet warm, and it also has a mixed door 50
In the range from the intermediate region to the fully open region, the heater mode is set, that is, the vent door 64 is closed (position A) and the floor door 63 is open.

Therefore, in the automatic air conditioner having such a structure, the mix door 50 is in the fully open position as shown in FIG.
There is a predetermined correspondence between the opening degree of the mix door 50 and the temperature of the air discharged from the vent duct 62 from position rv II) until reaching the intermediate region. However, from this state, the mix door 50 is further opened and when the middle IR region is reached, the high temperature air that has passed through the heater core 40 reaches the floor duct 61, and the low temperature air that has not passed through the heater core 40 reaches the vent duct 62. Duct 627! J
The temperature of the air heading towards the tower crew will drop suddenly. Therefore, when switching from vent mode to pie level mode, the heater core 40
In contrast, in pie level mode, the cold air that has passed through the evaporator 30 is discharged from the vent duct 62, which is a mixture of high-temperature air that passes through the evaporator 30 and cold air that does not pass through the vent duct 62. Since the air is discharged from 62, the passenger may feel uncomfortable due to sudden changes in air temperature.

This means that there is also a sudden temperature change when converting between heater mode and pie level. For example, when switching from heater mode to pie level mode, or when switching from pie level mode to vent mode, the outlet temperature changes almost instantaneously, as shown in FIG. 2. This makes the tower occupants feel uncomfortable, which is not a good feeling.

The present invention aims to solve such conventional problems, and combines a vent door that opens and closes a vent duct and a floor door that opens and closes a floor duct with a mix door that controls the amount of air flowing to the heater core. In an automotive air conditioner that controls opening and closing in conjunction with
When the vent door or the floor door opens and closes due to the operation of the mix door, the vent door or the floor door is gradually operated, and the amount of air discharged from the vent door and the floor duct into the vehicle interior is gradually changed. It is characterized by:

In the present invention, as shown in FIG. 5, the operating state of the power servo 43 for controlling the opening and closing of the mix door 50 is detected by a position detector 44 and sent to a control circuit 45. The position detector 44 includes a variable resistor, etc., and detection can be performed by setting a constant relationship between the resistance value of the variable resistor and the operating state of the power servo 43, that is, the open/close state of the mix door 50. .

Controller 45 sends a signal to transducer 46 to adjust the amount or speed of vacuum actuator 47 that operates vent door 64 and floor door 63. The negative pressure actuator 47 is connected to the vent door 64 and the floor door 63 via a link mechanism 48. Therefore, when switching from vent mode to pie level mode or vice versa by opening and closing the mix door 50, and when switching from pie level mode to heater mode or vice versa, The negative pressure actuator 47 gradually changes the vent door 64 and the floor door 63.

Therefore, in the present invention, the opening/closing timing characteristics of the mix door 5O, the vent door 64, and the floor door 63 are shown in FIG. 6. As shown,
When switching from pie level mode to vent mode,
Or vice versa, and when switching from pie level mode to heater mode, or vice versa, the opening degrees of the vent door and floor door gradually change to a predetermined mode position. The dashed-dotted line shows the case where there are no steps from fully open to fully open.

As described above, according to the present invention, the vent door that opens and closes the vent duct and the floor door that opens and closes the floor duct are controlled to open and close in conjunction with the mix door that controls the amount of air flowing to the heater core. In the automotive air conditioner, when the vent door or the floor door opens and closes due to the operation of the mix door, the vent door or the floor door is gradually operated.
The amount of air discharged from the duct into the passenger compartment changes gradually, so when the mode is switched, the temperature at the outlet changes gradually, which eliminates the discomfort for the tower occupants and provides comfortable air conditioning. There is an effect that can be obtained.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view showing an example of an automotive air conditioning system, Figure 2 is a graph showing the relationship between the opening degree and outlet temperature of a mix door in a conventional automotive air conditioning system, and Figure 3 is a graph showing the relationship between the opening degree and outlet temperature of a conventional automotive air conditioning system. A graph showing the relationship between the door opening degree and various modes, Figure 4 shows the relationship between the mixed door opening degree and the vent duct and floor.
FIG. 5 is a graph showing the relationship between the temperature of the air blown from the duct, FIG. 5 is a configuration diagram showing an embodiment of the present invention, and FIG. 6 is a graph showing the opening/closing characteristics of the door in the present invention. 20...Fan motor, 30...Evaporator,
40... Heater core, 50... Air mix door, 61... Floor duct, 62... Vent duct. Patent applicant: Japan Radiator Co., Ltd. 85 Fig. 1 10 Fig. 2 V Mi 1, entry door eye 11t H Fig. 3 Fig. 4

Claims (1)

[Claims] In an automotive air conditioning system, a vent door that opens and closes a vent duct and a floor door that opens and closes a floor duct are controlled to open and close in conjunction with a mix door that controls the amount of air flowing to a heater core. An automobile characterized in that when the vent door or the floor door opens and opens due to the operation of the door, the vent door or the floor door is gradually operated so that the amount of air discharged from the vent door and the floor duct into the vehicle interior is gradually changed. air peace device.