JPH11105533A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent large-sizing of outer form and cost increase in mounting a wax-cool means in a right/left separate type air conditioner. SOLUTION: A first and a second cold air bypasses 22, 23 to bypass cold air right and left are opened/closed by cold air doors 24 having a common drive shaft, and the cold air door 24 is driven to be operated by a first servo motor 9 through a cold air link 25. A third servo motor 21 for changing blow modes is mounted on the opposite surface, so the cold air link 25 can be easily mounted, with only one link required, to restrict large-sizing, and achieve mounting easiness to a vehicle. The cold air doors 24 are opened only when both a first and a second air mix doors 8, 11 which control right and left blow temperature close a heater core 6, so sense of disorder is not given to an occupant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a left-right independent air conditioner for a vehicle.

[0002]

2. Description of the Related Art In a vehicle air conditioner of a common left and right type (hereinafter referred to as an air conditioner), a cool air cooled by an evaporator is directly passed around a temperature control means (consisting of a heater core, its bypass and an air mixing door). There is known one using a mac school means (consisting of a cold air bypass and a cold air door) leading to an air outlet.

[0003]

When the above-mentioned mac school means is to be mounted on a left and right independent type air conditioner,
As with the left and right independent air mix doors, two independent cold air doors are set, and two cold air links are added to link the left and right cold air doors with the servo motors for driving the left and right air mix doors. Alternatively, two cold air servomotors must be additionally mounted to independently drive the left and right cold air doors. However, it is difficult to satisfy the above conditions in a limited space where the vehicle is mounted, and there is also a problem that the cost is significantly increased.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to suppress an increase in the size of the outer shape and an increase in cost that occur when the mac school means is mounted on a left and right independent type air conditioner.

[0005]

[Means for Solving the Problems]

(Means of Claim 1) By adopting the means of Claim 1, since only one cold air link for driving the cold air door is required, it can be mounted even in a limited space where the vehicle is mounted. In addition, since only one cold air door and one cold air link operate in common to the left and right, the increase in cost due to the mounting of the mac school means can be suppressed low. That is,
The cost of the left and right independent air conditioner equipped with the mac school means can be reduced. Further, the control device opens the first and second cold air bypasses only when the left and right air mixing doors block the heating means. Does not occur, and high comfort can be given to the occupant.

According to the second aspect of the present invention, the first air passage is provided with the first driving means and the cool air link, and the second air passage is provided with the second driving means. And third driving means. That is, since the cold air link is provided in the first air passage with few restrictions, the cold air link is excellent in mountability in the air conditioning case.

[0007]

Next, embodiments of the present invention will be described based on examples and modifications. [Embodiment] FIGS. 1 to 8 show an embodiment, and the left, right, front and rear shown in this embodiment are based on when the vehicle is mounted. 1 is a schematic view of an air conditioning unit, and FIGS. 2 to 4 are a rear view, a right side view, and a left side view of the air conditioning unit when mounted on a vehicle, as viewed from the front side of the vehicle.

The air conditioner comprises an air conditioning unit mounted in a dashboard at the front of the passenger compartment, a refrigeration cycle in which the refrigerant circulates by receiving the rotational torque of the engine, and a control device for controlling these. .

(Explanation of the air conditioning unit)
An air-conditioning case 1 is installed in the dashboard. The air-conditioning case 1 is divided into left and right by a central partition 2. In this embodiment, the right side is the first air passage 3, and the left side is the second air passage 4. A blower (not shown) provided with an inside / outside air switching unit is connected to an upstream end of the air conditioning case 1. The blower generates an airflow in the first and second air passages 3 and 4 toward the vehicle interior.

An evaporator 5 (corresponding to a cooling means) of a refrigeration cycle for cooling air supplied to the first and second air passages 3 and 4 is disposed upstream of the air conditioning case 1. Downstream of the evaporator 5, a heater core 6 for heating air supplied to the first and second air passages 3, 4 is provided.
(Corresponding to a heating means) is disposed. The heater core 6 uses the cooling water of the engine as a heat source, and is provided through the partition wall 2.

The first air passage 3 is provided with a first bypass 7 that bypasses the heater core 6. In the first air passage 3, the amount of hot air passing through the heater core 6 and the first
A first air mix door 8 is provided for adjusting the ratio of the amount of cool air passing through the bypass 7 to the amount of cool air passing therethrough. The first air mix door 8 is driven by a first servomotor 9 (corresponding to a first drive unit) attached to the right side surface of the first air passage 3.

The second air passage 4 employs the same structure as the first air passage 3, and reference numerals are shown in parentheses in FIG. Similarly to the first air passage 3, the second air passage 4 is provided with a second bypass 10 and a second air mixing door 11. The second air mixing door 11 is located on the left side of the second air passage 4. Drive operation is performed by a second servomotor 12 (corresponding to a second drive unit) attached to the surface.

Downstream of the first and second air passages 3 and 4,
An outlet that blows the air that has passed through the first and second air passages 3 and 4 toward the right and left sides of the vehicle is formed. These outlets include first and second defroster outlets 13 and 14 that mainly blow out warm air toward the windshield, and first and second face outlets 15 that mainly blow out cool air toward the upper body of the occupant. 16 and first and second foot outlets 17 and 18 for mainly blowing warm air toward the feet of the occupant.

First and second defroster outlets 13 and 14
Are simultaneously opened and closed by a defroster opening / closing door 19 having a common drive shaft. The first and second face outlets 15 and 16 and the first and second foot outlets 17 and 18 are simultaneously switched by a switching door 20 having a common drive shaft. The defroster opening / closing door 19 and the switching door 2
0 is driven by a third servomotor 21 (corresponding to third driving means) attached to the left side surface of the second air passage 4.

(Description of Mac School Means) First, Second
In the air passages 3 and 4, the first and second cold air bypasses 2 that guide the cool air that has passed through the evaporator 5 directly to the outlets, bypassing the heater core 6 and the first and second bypasses 7 and 10.
2, 23 are provided. The first and second cool air bypasses 22 and 23 are simultaneously opened and closed by a cool air door 24 having a common drive shaft. The cool air door 24 is driven by the first servomotor 9 via the cool air link 25.

The cold air link 25 will be described with reference to FIGS. First, the air mix link 26 linked to the cool air link 25 will be described. The air mix link 26 is provided on the right side of the first air passage 3 for driving the first air mix door 8 to be opened and closed by the first servo motor 9, and is connected to the first servo motor 9. It comprises a plate 27 and a driven plate 28 connected to the first air mix door 8.

When the drive plate 27 is set to the state shown in FIG. 5, the first air mix door 8 closes the first bypass 7,
The maximum temperature state where the heater core 6 is fully opened (the target opening degree SW
= 100%), the first bypass 7 opens when the drive plate 27 rotates in the direction of the arrow α from the state of FIG. And
When the drive plate 27 is rotated to the position shown in FIG. 6, the first air mix door 8 closes the heater core 6 and enters a minimum temperature state (a target opening degree SW = 0%) in which the first bypass 7 is fully opened.

The cold air link 25 is connected to the air mix link 2.
6, a first plate 29 provided on the right side of the first air passage 3 and integrally formed with the drive plate 27, a second plate 30 driven by the first plate 29, It is composed of a third plate 31 connected to the cool air door 24, and a connection bar 32 for interlocking the second plate 30 and the third plate 31.

When the drive plate 27 is set to the state shown in FIG. 6 (the lowest temperature state), the cool air door 24 closes the first and second cool air bypasses 22 and 23, and the drive plate 27 is moved from the state shown in FIG. When the first plate 29 is rotated in the direction of the arrow α, the second plate 30 and the third plate 31 are rotated in the direction of the arrow β, and the first and second cool air bypasses 22 and 23 are opened. When the drive plate 27 is rotated to the position shown in FIG. 7, the cool air door 24 is in a state of a mac school in which the first and second cool air bypasses 22 and 23 are fully opened.

The link groove 28a of the driven plate 28
When the driving plate 27 is rotated to open and close the cold air door 24, the driven plate 28 is not rotated.
8b are provided. Also, the second plate 30 includes
An arc groove 30a is provided that does not rotate the second plate 30 even when the drive plate 27 rotates to open and close the first air mix door 8.

(Explanation of the control device) The above-mentioned first, second and third servomotors 9, 12 and 21 are energized together with other electric components by a control device (not shown). The control device uses a computer, calculates the left and right target outlet temperatures TAO based on the operation signals from the occupants and the sensor signals from various sensors, and controls the energization of each electric component based on the calculation result. Is what you do.

Here, the control of the opening of the first and second air mixing doors 8 and 11 and the control of the opening of the cool air door 24 by the control device will be described with reference to the flowchart of FIG. Various signals are input (step S1), and the left and right target outlet temperatures TAO are calculated (step S2). It is determined whether the target opening degree SW of the second air mix door 11 calculated from the vehicle left side target outlet temperature TAO is 0% or less (step S3).

If the determination in step S3 is YES,
This means that the second air mix door 11 fully closes the heater core 6. Therefore, the result of the determination in step S3 is YE
In the case of S, the second air mix door 11 and the cool air door 24 are opened / closed by the target opening degree SW of the first air mix door 8 calculated from the vehicle right target outlet temperature TAO (step S4). That is, in steps S3 and S4, the first and second air mixing doors 11 are
Only when is completely closed, the cold air door 24 can be opened.

If the determination in step S3 is NO, it means that the second air mix door 11 opens the heater core 6, and the left occupant does not request the cold air of the lowest temperature. Therefore, if the determination result in step S3 is NO, the target opening degree SW of the first air mix door 8 calculated from the vehicle right side target blowing temperature TAO is set to 0 to 100% so that the cold air door 24 is not opened. The period is limited (step S5).

(Effects of the Embodiment) As described above, only one cool air link 25 for driving the cool air door 24 is required, and this one cool air link 25 is used as the third servomotor 21 for switching the blowing mode. Is provided on the right side surface of the first air passage 3 opposite to the mounting surface. For this reason, the mountability of the cool air link 25 is excellent, and the mac school means can be easily mounted on the left and right independent type air conditioner.

Further, since only one cold air link 25 is required,
Even in the limited space where the vehicle is mounted, the cold air door 24
A left-right independent air-conditioning system equipped with a can be installed.
Since only one cool air link 25 is required, the cost of the left and right independent air conditioner equipped with the mac school means can be reduced. Further, only when both the first and second air mix doors 8 and 11 close the heater core 6, the first and second cold air bypasses 22 and 23 are opened, so that one of the left and right occupants wants a warm blowing wind. There is no problem that the cold air is blown out, and the occupant does not feel uncomfortable by opening and closing the first and second cold air bypasses 22 and 23 simultaneously.

[Modification] In the above embodiment, the right side is the first
Although the example in which the air passage 3 and the left side are the second air passages 4 is shown, the reverse is also possible.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an air conditioning unit.

FIG. 2 is a rear view of the air conditioning unit.

FIG. 3 is a right side view of the air conditioning unit.

FIG. 4 is a left side view of the air conditioning unit.

FIG. 5 is an explanatory diagram of a link arrangement in a state where a target opening degree is 100%.

FIG. 6 is an explanatory diagram of a link arrangement in which a target opening degree is 0%.

FIG. 7 is an explanatory diagram of a link arrangement in a state where a cool air door is opened.

FIG. 8 is a flowchart showing door control.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air-conditioning case 3 1st air path 4 2nd air path 5 Evaporator (cooling means) 6 Heater core (heating means) 7 1st bypass 8 1st air mix door 9 1st servomotor (1st drive means) 10 2nd bypass 11 Second Air Mix Door 12 Second Servo Motor (Second Driving Means) 21 Third Servo Motor (Third Driving Means) 22 First Cold Air Bypass 23 Second Cold Air Bypass 24 Cold Air Door 25 Cold Air Link

Claims (2)

[Claims] (A) an air-conditioning case having an interior divided into a first air passage and a second air passage; and (b) air provided in the air-conditioning case and flowing through the first and second air passages. (C) provided downstream of the cooling means, the first and second cooling means;
Heating means for heating air flowing through the air passage; (d) first and second bypasses bypassing the heating means;
A first and a second for adjusting a ratio of air passing through the heating means;
(E) first and second driving means for driving the first and second air mixing doors, and (f) first and second driving means which bypass the heating means and the first and second bypasses. (2) a cold-air door that opens and closes a cold-air bypass; (g) a cold-air link that drives the cold-air door by the first driving means; and (h) a first and a second that control the first and second driving means. A control device for opening an opening of the cold air door when both of the air mixing doors close the heating means. 2. A vehicle air conditioner according to claim 1, wherein a third drive means for switching a blowing mode is provided on a side surface of said second air passage.