JP2596838Y2 - Automotive air conditioners - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a vehicle air conditioner.

[0002]

2. Description of the Related Art In general, an air conditioner for a vehicle has a plurality of air outlet modes as a combination of air outlets of conditioned air blown into a vehicle cabin. These air outlet modes can be opened and closed by each air outlet. It is configured by combining the open / close positions of a plurality of provided control doors.

[0003] For example, a vent outlet for blowing conditioned air to the upper body of the occupant to control the temperature in the room, and a vent for mainly guiding warm air to the feet of the occupant to enhance the occupant's feeling of heating. There is a foot outlet, and a differential outlet for guiding warm air to the inner surface of the windshield to remove fogging of the glass.These vents are provided with a vent door, a foot door and a differential door, respectively, which are rotatably provided. The three control doors are configured to be opened and closed by an electric actuator via a link mechanism. The blow mode includes, for example, a vent mode (VENT) in which only the vent outlet is opened, a bi-level mode (B / L) in which the vent outlet and the foot outlet are each opened, and a foot mode and a differential outlet in each case. There are a foot mode (FOOT) for opening, a differential foot mode (D / F) for opening the foot outlet and the differential outlet, and a differential mode (DEF) for opening only the differential outlet. The air distribution ratio in each mode, that is, the ratio of the air volume blown out from each air outlet in each mode is determined in advance, for example, as shown in FIG. 11, and this air distribution ratio determines the door position of each control door. It is realized by adjusting. For example, the vent door has three door positions (fully closed, half open, fully open), the foot door has three door positions (fully closed, half open, fully open), and the differential door has four door positions (fully closed, small open,
(Half open, full open). The operation state of each control door in each mode is, for example, as shown in FIG. 12, in the vent mode, only the vent door is opened, in the bi-level mode, the vent door and the foot door are each half-opened, and in the foot mode, With the foot door open, the differential door is set to a small open state, the differential door is half-opened in the differential foot mode, and only the differential door is opened in the differential mode.

[0004]

However, in such a conventional air conditioner for a vehicle, three control doors each having an intermediate position are simultaneously operated by one electric actuator, so that the predetermined door in each mode is controlled. Therefore, a very complicated link mechanism is required.

Therefore, as one of the measures for simplifying the link mechanism, the intermediate position is abolished for the operation of the control door,
Although it is conceivable to use the control door in two positions of fully open and fully closed (for example, see JP-A-62-12042 and JP-A-61-152507), simply operate the control door in two positions. By itself, a desired air distribution ratio cannot be obtained.

The present invention has been made in view of such problems of the prior art, and drives a control door for air distribution.
It is an object of the present invention to provide a vehicle air conditioner that can eliminate a link mechanism for the vehicle.

[0007]

In order to achieve the above object, the present invention provides a heater unit case having a vent outlet for blowing air toward the upper body of an occupant, and a differential blower for blowing air toward a window glass . An outlet and a foot outlet for blowing air toward the feet of the occupant are opened, control doors are provided at each of the outlets so as to be openable and closable, and the opening and closing positions of the plurality of control doors are combined so as to make the base.
Vent mode to open only the vent outlet and the vent
The outlet and the foot outlet are adjusted so that a predetermined air distribution ratio is achieved.
Bi-level mode to open each, and the foot outlet
And the differential air outlets are opened to achieve the specified air distribution ratio.
Release foot mode, the foot outlet and the differential
Open the outlets to achieve other predetermined air distribution ratios.
Diff mode and differential opening only the differential outlet
The air-conditioning apparatus comprising constitute a mode, as well as directly connecting a dedicated actuator that drives it to each of the plurality of control doors, opening and closing at least the vent outlet of the plurality of control doors its a foot door made of a single door for opening and closing a and two of the vent door constituted by a door the foot outlet
The actuator is operated only in two positions of fully open and fully closed by dedicated actuators each having no stop mechanism , and the vent outlet, the differential outlet , and the foot The cross-sectional area of each outlet passage so that each airflow resistance of the outlet is the differential outlet > foot outlet> vent outlet
Set the two vent doors when in bi-level mode.
Only one of the two and the foot door fully open
As the predetermined bi-level mode air distribution ratio
In the differential foot mode, the differential door and the
Doors are fully open and the other predetermined differential
The heater unit to satisfy the air distribution ratio
It is characterized by becoming .

[0008]

According to the present invention, a dedicated actuator for driving each control door is directly connected to each control door, and the vent door is composed of two doors.
At least two of the control doors
The door and one foot door are operated only in the two positions of fully open and fully closed, respectively , and the ventilation resistance of the vent outlet, the differential outlet , and the foot outlet is such that the differential outlet > the foot outlet the exit> vent outlet
Set the cross-sectional area of each outlet passage so that the bi-level mode
Sometimes only one of the two vent doors and the foot door
And fully open, respectively, and the predetermined bi-level mode air distribution ratio
So that the differential door is
Fully open the foot doors and open the other designated differential foot
Since the mode air distribution ratio is satisfied , each blowing mode , especially the bypass mode , can be used without using a complicated link mechanism as in the past.
A desired air distribution ratio is realized in a mixed mode such as a level mode or a differential foot mode . At that time, the vent door
With two doors and only one in bi-level mode.
Since it can be opened, in addition to achieving the desired air distribution ratio described above,
Is also reduced. It is also operated in two positions
The actuator that drives the door has no stopping mechanism
And in the case of an electric actuator, a special
Path is unnecessary, and the structure of the electric actuator is simplified.
It is.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic structural view mainly showing a heater unit of an air conditioner for a vehicle according to an embodiment of the present invention, FIG.
Is a diagram showing a door position in the vent mode according to the embodiment,
FIG. 3 is a diagram showing a door position in the bi-level mode according to the embodiment, FIG. 4 is a diagram showing a door position in the foot mode according to the embodiment, and FIG. 5 is also a differential foot mode according to the embodiment. FIG. 6 is a diagram showing the door position, and FIG. 6 is a diagram showing the door position in the differential mode according to the embodiment.
8 is an exploded plan view of the electric actuator of the embodiment, FIG. 8 is a plan view of the main part thereof, FIG. 9 is a cross-sectional view of the main part showing a connection structure between the electric actuator and the door shaft according to the embodiment, and FIG. FIG. 2 is a diagram showing a drive circuit of the electric actuator according to the first embodiment.

This vehicle air conditioner is composed of an intake unit (not shown), a cooling unit, and a heater unit 10 (shown). Like a general vehicle air conditioner, air introduced by the intake unit is cooled by the cooling unit. After cooling, reheating by the heater unit 10 and adjusting the temperature, the air is blown into the vehicle interior.

The heater unit 10 has a heater core 12 in which a cooling water circulates in the unit case 11.
A detour 13 is formed in the vicinity of the heater core 12 for bypassing the heater core 12 and guiding the intake air to a mixing chamber described later. An air mix door 14 that adjusts the ratio of the amount of air passing through the heater core 12 to the amount of air passing through the bypass 13 is rotatably mounted upstream of the heater core 12.
The air mix door 14 is driven by an air mix door actuator 15.

On the other hand, on the downstream side of the heater core 12, there is formed a mixing chamber 16 for mixing the hot air passing through the heater core 12 and the cold air passing through the detour 13 and supplying the mixed air to the vehicle interior without mixing. Further, a plurality of outlets 17 to 19 are opened in the mixing chamber 16.
The vent outlet 17 is for supplying conditioned air to the upper body of the occupant through a vent duct 20 to provide a desired indoor environment, and the differential outlet 18
Is for supplying conditioned air along the inner surface of the windshield through the differential duct 21 to remove fogging and secure a forward view. The foot outlet 19 is
This is for supplying warm air to the feet of the occupant through the foot duct 22 to heat the vehicle interior. Each outlet 1
7 to 19 are provided with control doors 23 to 26 for opening and closing them. The vent outlet 17 has first and second vent doors 23 and 24, the differential outlet 18 has a differential door 25 and a foot outlet 19. , Foot doors 26 are rotatably mounted respectively. These doors 23 to 26 are respectively provided with a first vent door actuator 27, a second vent door actuator 28, and a differential door actuator 2
9. It is independently driven by the foot door actuator 30. These actuators 27 to 30 are constituted by electric actuators with a built-in motor as described later. The selection of the conditioned air mixed in the mixing chamber 16 of the heater unit 10 from which outlet and at what air distribution ratio the vehicle interior is determined by a combination of the open / close positions of the control doors 23 to 26. For example, the blowing mode includes a vent mode (VENT) in which only the vent outlet 17 is opened, and a bi-level mode (B / L) in which the vent outlet 17 and the foot outlet 19 are each opened.
A foot mode (FOOT) for opening the foot outlet 19 and the differential outlet 18 respectively, a differential foot mode (D / F) for opening the foot outlet 19 and the differential outlet 18 respectively, and a differential outlet 18 Only the differential mode (DEF) in which only the air flow is opened, the air distribution ratio in each mode is set as shown in FIG. 11, for example.

In this embodiment, the position of each of the control doors 23 to 26 is, as shown in FIG.
As for the doors 3, 24 and the foot door 26, the conventionally provided intermediate position is abolished, and the door is fully closed (A position) and fully opened (B
Position), and the differential door 25 can be set to three positions of fully closed (A position), half open (B position) and fully open (C position) by eliminating one intermediate position. I have. Realization of the air distribution ratio as shown in FIG. 11 by combining such door positions is performed by adjusting the sizes of the control doors 23 to 26 and the opening areas of the air outlets 17 to 19 to appropriate values. . For example, in order to achieve a foot-to-vent air distribution ratio of 40% in the bi-level mode, the foot ventilation resistance is made higher than that of the vent, and to achieve a foot-to-def air distribution ratio of 60% in the differential foot mode. Keep the ventilation resistance of the foot lower than the differential.

The state of the door position in each blowing mode is as shown in FIGS. That is, in the vent mode, as shown in FIG. 2, the first and second vent doors 23 and 24 are fully opened, and the differential door 25 and the foot door 26 are fully closed.
As shown in FIG. 3, the first vent door 23 and the foot door 2
6 and the second vent door 24 and the differential door 25 are fully closed. In the foot mode, as shown in FIG. 4, the first and second vent doors 23 and 24 are fully closed and the foot door 26 is fully opened. And the differential door 25 is opened halfway. In the differential foot mode, as shown in FIG. 5, the first and second vent doors 23 and 24 are fully closed, and the differential door 25 and the foot door 26 are fully opened. In the differential mode, as shown in FIG. As the first and second
The vent doors 23 and 24 and the foot door 26 are fully closed and the differential door 25 is fully opened.

Further, in the present embodiment, the cool air is blown to the upstream side of the heater core 12 through the fresh vent duct 31 in order to eliminate the head sensation at the time of heating and to enable the heat of the head to be cold and hot. A fresh vent outlet 32 for directly bypassing the vent duct 20 is provided, and a fresh vent door 33 for opening and closing the fresh vent outlet 32 is rotatably attached to the fresh vent outlet 32. The fresh vent door 33 is driven by a fresh vent door actuator 34.

The above-described air mix door actuator 15, first vent door actuator 27, second vent door actuator 28, differential door actuator 2
9, the foot door actuator 30 and the fresh vent door actuator 34 are each connected to the auto amplifier 35. Also, the auto amplifier 35 has
Various sensors 3 such as inside air sensor, outside air sensor, solar radiation sensor
In addition to the switches 6, switches 37 such as an air conditioner switch, a temperature switch, and a mode switch are connected. The auto-amplifier 35 has a built-in microcomputer, takes in information from various sensors 36 and switches 37, performs arithmetic processing on this information, and outputs the arithmetic results to the various actuators 15 and 2 described above.
7 to 30, 34, etc. Therefore, the automatic selection control of the blowing mode of the control door is performed by outputting the calculation result of the auto amplifier 35 to the actuators 27 to 30 that drive the control doors 23 to 26. In addition to the automatic control, it is of course possible to manually set a desired blowing mode by operating a mode switch.

Further, as described above, each of the control doors 23-
26 are driven by dedicated electric actuators 27 to 30, respectively. In this embodiment, the output shafts of the electric actuators 27 to 30 are directly connected to the door shafts of the control doors 23 to 26.

For example, taking an electric actuator 30 for driving the foot door 26 as an example, this electric actuator 30 is provided with a motor M, a worm gear 39, etc. in upper and lower casings 38a, 38b as shown in FIGS. Mechanism 40, the pinion gear 4 of this reduction mechanism 40
1 and an output shaft 42 integrally formed therewith. The tip of the output shaft 42 has a taper 43, and a slit-like groove 44 is formed along the center. The reduction mechanism 40 includes a plurality of gears 39, 45, 46, 47, and 41. In this embodiment, the gears 39, 45, 46, 47, and 41 take up as little space as possible in the lower casing 38b. Housed in Note that reference numeral "48" denotes a connector for supplying a current to the motor M in order to control the energization of the motor M. In addition, other electric actuators 27 to
29 has the same structure.

The connection between the foot door 26 and the electric actuator 30 is made as shown in FIG.
6 by inserting the output shaft 42 of the electric actuator 30 into a connection hole 50 formed in the door shaft 49. This also applies to the connection between the other control doors 23 to 25 and the corresponding electric actuators 27 to 29.

In particular, electric actuators 27, 28, 30 ("30") for driving control doors (first and second vent doors 23, 24, foot door 26) used in two positions.
) Is configured to rotate freely and continue to rotate as long as the power is on if there is no lock. The circuit configuration is as shown in FIG. 10, and is simply composed of a motor M and a changeover switch 51 for switching between normal rotation and reverse rotation. There is no need for a circuit for detection or a circuit for detecting the position of the door and stopping it at a predetermined position (usually composed of a brush and a circuit pattern). The reason is that the motor M of the electric actuator 30 is smaller than the conventional one, and the lock current is small, so that the heat generation at the time of locking is small, and the torque at the time of locking is also small. This is because it is not always necessary to detect the locked state. In addition, in the actual operation, four to five doors were conventionally operated by one actuator, but in the present embodiment, one door is operated by one actuator, so that even a small torque is sufficient. it can. Therefore, the first and second vent doors 2
When the electric actuators 27, 28, 30 rotate forward or backward only when the doors 3, 24 and the foot door 26 are operated, the doors 23, 24, 26 rotate until they are locked, that is, open or closed. become.

Therefore, according to the present embodiment, dedicated electric actuators 27 to 30 for driving the control doors 23 to 26 are provided for each of the control doors 23 to 26, and the control doors 23 to 26 are directly connected to each other. No longer needed
Since only one type of output shaft is used, no mold cost is generated when the vehicle is used for another vehicle model, and a complicated link mechanism is not required.

Further, the first and second vent doors 23 and 24 and the foot door 26 are not provided in the intermediate positions, and are not used.
Since the control is performed based on the position, the electric actuators 27, 28, and 30 do not need to be provided with a stop terminal or a brush, and the structure of the electric actuator can be simplified. At this time, since the electric actuator only needs to be configured to rotate freely, there is no need for a set structure or a set operation in consideration of the sealing property of the door and the like. Further, since a brush or the like is not used, it can be used for an arbitrary door irrespective of variations in actuators and door opening.

As described above, according to the present invention, each blowing mode , particularly bilevel
In addition to achieving the desired air distribution ratio in the mixed mode such as
Reduced torque and simplified actuator structure
You .

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram centered on a heater unit of an automotive air conditioner according to an embodiment of the present invention.

FIG. 2 is a diagram showing a door position in a vent mode according to the embodiment.

FIG. 3 is a diagram showing a door position in a bilevel mode according to the embodiment.

FIG. 4 is a diagram showing a door position in a foot mode according to the embodiment.

FIG. 5 is a diagram showing a door position in a differential foot mode according to the same embodiment.

FIG. 6 is a view showing a door position in a differential mode according to the embodiment.

FIG. 7 is an exploded plan view of the electric actuator of the embodiment.

FIG. 8 is a plan view of a main part of the electric actuator of FIG. 7;

FIG. 9 is a fragmentary cross-sectional view showing a connection structure between the electric actuator and the door shaft according to the embodiment.

FIG. 10 is a diagram showing a drive circuit of the electric actuator according to the embodiment.

FIG. 11 is a diagram showing an air distribution ratio in each mode.

FIG. 12 is a diagram showing an operation state of a control door in each mode in the related art.

[Explanation of symbols]

 Reference Signs List 10 heater unit 11 unit case 17 vent outlet 18 differential outlet 19 foot outlet 23 first vent door (control door) 24 second vent door (control door) 25 differential door (control door) 26 Foot door (control door) 27: first vent door actuator (drive means) 28 ... second vent door actuator (drive means) 29 ... differential door actuator (drive means) 30 ... foot door actuator (drive means)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60H 1/00 102 B60H 1/00 103

Claims (1)

(57) [Scope of request for utility model registration] An occupant is provided in a heater unit case (11) .
Vent outlet that blows air toward the upper body (17)
And a differential outlet that blows air toward the window glass (1
8), a foot air outlet for blowing air toward the passenger's feet (19) opened and, each of these air outlets (1
7, 18, 19) control doors (23, 24, 25 , 2)
6) is provided so as to be openable and closable, and the plurality of control doors (23,
24, 25, 26) to open and close only the vent outlet (17).
And the vent outlet (17) and the foot outlet
(19) Opening each bar so that the air distribution ratio becomes the specified
Level mode, the foot outlet (19) and the
Open the air outlets (18) so that they have the specified air distribution ratio.
Release the foot mode, the foot outlet (19) and the front
The differential air outlet (18) is adjusted to another predetermined air distribution ratio.
The differential foot mode that opens each time, and the differential air outlet
(18) The air-conditioning apparatus comprising constitute a defrost mode for opening only, it of the plurality of control doors (23, 24, 25, 26)
A dedicated actuator (27, 2) for driving each
8, 29, 30) and two doors for opening and closing at least the vent outlet (17) of the plurality of control doors (23, 24, 25, 26).
It has been vent door (23, 24) and the foot air outlet
(19) Foot door consisting of a single door that opens and closes
(26) and dedicated actuators without a stop mechanism
The vent outlets (17) , the differential outlets (18) , and the foot blowers are operated only in two positions of fully open and fully closed by the heaters (27, 28, 30). Each air outlet passage so that each air flow resistance of the outlet (19) is as follows : differential air outlet > foot air outlet> vent air outlet
The cross-sectional area of the two
Only one of the doors (23, 24) and the
Door (26) is fully opened and the predetermined
To satisfy the level mode air distribution ratio,
At the time of loading, the differential door (25) and the foot door (2)
6) is fully opened and the other predetermined differential foot model
The heater unit (10) is configured to satisfy the air distribution ratio
Automotive air conditioning system, characterized in that to become to.