JPH0736806Y2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a vehicle air conditioner having a cold air bypass passage.

(Prior Art) In a conventional vehicle air conditioning system, for example
As disclosed in the publication, there is a cool air bypass passage that connects a direct downstream of an evaporator of a cooler and a vent duct that communicates with a main outlet of conditioned air.
By providing this cold air bypass passage, it is possible to increase the amount of cold air blown out from the vent duct during cooling in the vent mode, and at the same time, to let warm air blow out from the heater duct to the occupant's feet when heating in the heat mode. It enables so-called head cold foot heat, which blows out cold air from.

By the way, in this type of vehicle air conditioner, an air mix door is provided on the downstream side of the evaporator in order to control the amount of air flowing through the heater core. This air mix door fully closes the heater core side passage when the temperature control lever provided on the dashboard of the vehicle is set to the lowest temperature position during cooling (hereinafter referred to as "full cold"). , Is operated so as to fully open the passage of the air cooled by the evaporator. A bypass door for opening and closing the cold air bypass passage is provided in the cold air bypass passage.

However, if the bypass door is closed at the time of full cold, the cold air bypass passage becomes invalid and the amount of cold air blown out from the vent duct does not increase. Therefore, it is conceivable to open the bypass door in conjunction with the air mix door being operated to the full cold position, but in that case, the head cold foot thermal operation cannot be obtained.

(Purpose of the Invention) In view of the above-mentioned circumstances, the present invention aims to provide an air conditioner for a vehicle, which ensures an increase in the air volume during a full cold and can also perform a head cold foot thermal operation.

(Structure of the Invention) The present invention provides, in the cold air bypass passage, a first bypass door capable of manually opening and closing the cold air bypass passage,
When the air mix door is operated in a full cold state, a second bypass door is provided which is opened in conjunction with this to introduce cold air into the cold air bypass passage from the downstream side of the first bypass door. Characterize.

(Effect of the Invention) According to the present invention, even when the first bypass door closes the cold air bypass passage at the time of full cold, the cold air is introduced into the cold air bypass passage by the second bypass door that is interlocked with the air mix door. As a result, the increase in air volume during full cold is reliably achieved, and by manually opening the first bypass door during heating,
You can also get a head cold foot heat movement.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is an air conditioning unit, and 2 is an operation panel provided with various operation knobs for operating the air conditioning unit 1.

The air-conditioning unit 1 goes from the upstream side of the casing 3 to the downstream side, and an intake door 4 that selects whether the intake air is circulated into the inside air or introduced into the outside air, and the air sucked through the intake door 4 is supplied to the vehicle. A blower 5 that blows air to the room, and an evaporator 6 that exchanges heat with the blown air during cooling.
In the air that has passed through the evaporator 6, an air mix door 7 that controls the amount of air that is diverted to a heater core 8 that will be described later, and cooling water for the engine that is circulated to act as a heater and diagonally heat the passing air. And a heater core 8 disposed in the vehicle and three mode switching doors 9A, 9B and 9C for selecting an air outlet to the vehicle compartment. Of these three mode switching doors 9A, 9B, and 9C, the door 9A is a vent door for blowing out conditioned air through the vent duct 10 from the central grill and the left and right side grills of the front seats, which are the main outlets. 9B is a defroster door. Further, the door 9C is a heater door for blowing warm air from the heater duct 11 to the feet of an occupant by the opening operation of the door 9C during heating.

When the air mix door 7 is fully cold, the air mix door 7 is operated to cover the heater core 8 so that the heater core 8 side passage is fully closed and the cold air passage passing through the evaporator 6 is fully opened. A cold air bypass passage that connects the vent duct 10 to the downstream side of the evaporator 6
12 is provided, and at the inlet of this cold air bypass passage 12, a first bypass door for opening and closing this passage 12
13 are provided.

Further, in the cold air bypass passage 12, a second bypass door 14 is provided on the downstream side of the first bypass door 13,
The second bypass door 14 is normally closed,
When the air mix door 7 is operated in the full cold state, the air mix door 7 is opened in conjunction with this to introduce cold air into the cold air bypass passage 12.

The operation panel 2 includes a mode selection lever 15 for opening and closing the mode switching doors 9A, 9B, 9C in a predetermined order, and a temperature adjusting lever for adjusting the opening of the air mix door 7 to set the temperature. 16, an intake air selection lever 17 for operating the intake door to select inside air circulation or outside air introduction, an air volume adjustment lever 18 for adjusting ON / OFF of the blower 5 motor and its rotation speed, and a cold air bypass aisle
An operation lever 19 for opening and closing the first bypass door 13 provided at the entrance of 12 and an ON / OFF switch 20 of the cooling compressor are provided.

Then, when the mode selection lever 15 is set to the vent mode position, the vent door 9A is opened, the cooling compressor is started by the switch 20, and the temperature control lever 16 is set to the lowest temperature position at the left end, at the time of full cold, As shown in FIG. 2, the air mix door 7 has a heater core 8
The side passage is fully closed and the passage of the air cooled by the evaporator 6 is fully opened. At this time, the second bypass door 14
Operates in conjunction with the air mix door 7 to open the cold air bypass passage 12, so that even if the first bypass door 13 is closed, cold air is introduced into the cold air bypass passage 12 through the second bypass door 14. As a result, the cold air that has passed through the vent door 9A and the cold air that has passed through the cold air bypass passage 12 merge in the vent duct 10.

When the mode selection lever 15 is set to the heat mode position during heating, the vent door 9A and the second bypass door 14 are both closed and the heater door 9C is opened as shown in FIG. The wind blows out to the occupant's feet. At this time, the lever 19 is operated to open the first bypass door 13, and the switch 20 operates the compressor of the cooler to introduce the cool air from the evaporator 6 into the cold air bypass passage 12. Then, the cold air can be blown out through the vent duct 10 above the occupant's head, resulting in cold head heat.

FIGS. 3 to 5 show an example of a mechanism for interlocking the air mix door 7 and the second bypass door 14. The rotary shaft 7a of the air mix door 7 and the rotary shaft of the second bypass door 14 are shown in FIG.
The link mechanism 21 is connected to 14a. The link mechanism 21 has an elongated plate-like arm member 2 which has one end fixed to both rotary shafts 7a and 14a and which rotates together with the rotary shafts 7a and 14a.
2, 23 and L connecting these two arm members 22, 23
The link member 24 has a character shape. A linear groove 25 is formed along the longitudinal direction of the arm member 22 on the side of the air mix door 7, and a curved groove is formed along the longitudinal direction of the arm member 23 on the side of the second bypass door 14 as well. The groove 26 is formed. The link member 24 has a shaft 27 at its middle portion.
Is pivotally supported by the link member 24
Engagement portions 24a and 24b are provided at both ends of the, respectively. The link member 24 is connected to the arm members 22 and 23 in such a manner that the engaging portions 24a and 24b are slidably engaged with the grooves 25 and 26 of the arm members 22 and 23, respectively.

With the above configuration, in the full hot state in which the temperature control lever 16 of the operation panel 2 is set to the maximum temperature position at the right end during heating, the air mix door 7 fully opens the passage on the heater core 8 side as shown in FIG. The engaging portions 24a and 24b of the link member 24 are both at the tip positions of the grooves 25 and 26, and the second bypass door 14 is maintained at the closed position. Then, in the state of FIG. 4, the second bypass door 14
The groove 26 of the side arm member 23 is formed such that the front half thereof is on an arc centered on the shaft 27.

When the air mix door 7 is brought to the intermediate state by moving the temperature adjusting lever 16 to the intermediate position from this state, the link member 24 is rotated along with the counterclockwise rotation of the arm member 22.
While rotating the engaging portion 24a along the groove 25 of the arm member 22, the engaging portion 24a is rotated clockwise to be in the state shown in FIG.
In this case, the tip half of the groove 26 of the other arm member 23 is
Since it is on an arc centered on the shaft 27, even if the engaging portion 24b of the link member 24 slides in the groove 26, the arm member 23 is not rotated, and therefore the second bypass door 14 is also in the closed position. Maintained.

Next, in the full cold state in which the temperature adjusting lever 16 is set to the leftmost lowest temperature position during cooling, the air mix door 7 is in a position to fully close the passage on the heater core 8 side, and therefore the link member 24 has its engaging portion. While moving 24a along the groove 25 of the arm member 22, it is further rotated clockwise. Along with this, the engagement portion 24b of the link member 24 slides along the proximal half of the groove 26 of the arm member 23, whereby the arm member 23 is rotated counterclockwise around the shaft 23a, Take the position shown in FIG. Therefore, since the second bypass door 14 is opened, cold air is introduced into the cold air bypass passage 12,
It is supplied to the vent duct 10 together with the cool air passing through the vent door 9A.

The interlocking operation between the air mix door 7 and the second bypass door 14 is performed by an actuator motor provided on each of the rotary shafts 7a and 14a, in addition to the mechanical operation using the link mechanism 21 as described above. You may do this in a timely manner.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a schematic diagram of a main part for explaining the operation, and FIGS. 3 to 5 show an air mix door and a second bypass door. It is operation | movement explanatory drawing of the link mechanism linked. 1 ... Air conditioning unit, 2 ... Operation panel 5 ... Blower, 6 ... Evaporator 7 ... Air mix door, 8 ... Heater core 10 ... Vent duct, 11 ... Heater duct 12 ... Cold air bypass passage 13 ... First bypass door 14 …… Second bypass door, 21 …… Link mechanism

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Haruhiro Inada 3-1, Shinchi Fuchu-cho, Aki-gun, Hiroshima Mazda Co., Ltd. (72) Inventor Kozo Shiomoto 3-3 Shinchi, Fuchu-cho, Aki-gun, Hiroshima Mazda Incorporated (56) Reference JP 62-55216 (JP, A) Actually open 61-147613 (JP, U) Actually open 58-48516 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. When the amount of air flowing through a heater core (8) is controlled, at the time of full cold, the passage on the heater core (8) side is fully closed and the passage of air cooled by an evaporator (6) is fully opened. An air conditioner for a vehicle, comprising an air mix door (7) and a vent duct (10) communicating with a main outlet of conditioned air, wherein the vent duct (10) is provided directly downstream of the evaporator (6). Provide a cold air bypass passage (12) for communication,
In the cold air bypass passage (12), when the first bypass door (13) that can open and close the cold air bypass passage (12) by manual operation and the air mix door (7) are operated in a full cold state, A second bypass door (14) which is operated in conjunction with the first bypass door (13) to introduce cold air from the downstream side of the first bypass door (13) into the cold air bypass passage (12).
An air conditioner for a vehicle, characterized by being provided with.