JPH0126490Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to an air conditioning duct for a vehicle air conditioner, and is designed to be particularly comfortable for heating purposes.

(Prior art) Conventional air conditioning ducts for vehicles are, for example,
- As shown in Publication No. 50812, the cooling duct installed on the vehicle ceiling and the heating duct buried in the floor are connected to a rising duct and a coupling duct branched from the underfloor duct leading to the air conditioner, respectively. A damper for adjusting the amount of air blown to the cooling duct and the heating duct was provided at the branching point between the rising duct and the coupling duct.

Therefore, during cooling, the damper blocks and blocks the connecting duct to supply cold air sent from the air conditioner from the cooling duct into the vehicle interior, while during heating, the damper blocks and blocks the rising duct to supply warm air from the heating duct to the vehicle interior. Either by supplying warm air into the vehicle interior, or by locating the damper so that the joint duct and rising duct open at a desired ratio, hot air was supplied into the vehicle interior from both the heating duct and the cooling duct at the same ratio. .

(Problem to be solved by the invention) During heating, the damper installed at the branching point between the above-mentioned coupling duct and the riser duct generally reduces the ratio of hot air volume sent to the heating duct and cooling duct to 7:3 or more. They are positioned in an 8:2 ratio to maintain a comfortable temperature distribution inside the vehicle, keeping the head cold and feet warm. Therefore, if the damper can only be operated in three stages: a position where the combined duct or the rising duct is closed and cut off, and a position where the combined duct and the rising duct are opened at a ratio of 7:3 to 8:2. Good.

However, on cold days when constant heating is required, a comfortable environmental condition can be provided by distributing warm air at the above ratio, but on warm days in winter, early spring, late autumn, etc. Even if warm air is supplied into the vehicle interior at the above rate, the head may feel hot at times, and a comfortable temperature distribution of cold head and warm feet type cannot always be obtained.

Therefore, in this invention, the purpose of this invention is to provide a vehicle air conditioning duct that can finely adjust the temperature state of the head during heating as necessary, and achieve a comfortable cold-head-warm-foot-type state. There is.

(Means for Solving the Problems) The gist of this invention is to connect a vehicle air conditioning duct to a first air-conditioning duct attached to the ceiling of the vehicle body in the direction of vehicle movement, and a first air-conditioning duct installed under the floor or under the seat. A second outlet duct also installed in the vehicle traveling direction, a first connecting duct connected to the air conditioner provided under the floor and leading to the second outlet duct, and one end connected to the first connecting duct. a second connecting duct whose other end is connected to the first blowing duct; and an outside air introduction duct connected to the second connecting duct and opening outside the vehicle via a blower device. A first damper is provided at a connecting portion between the first connecting duct and the second connecting duct to adjust the amount of air sent to each of the first blowing duct and the second blowing duct. and a second damper is provided in the outside air introduction duct for adjusting the amount of outside air flowing into the second connecting duct.

(Function) Therefore, during heating, the warm air sent from the air conditioner to the first and second blow-off ducts is divided into desired proportions by the first damper and sent to the first blow-off duct. Furthermore, a desired amount of outside air sucked by the blower from the outside air introduction duct connected to the second connecting duct is sent by the second damper. In other words, the warm air sent from the air conditioner to the first blow-off duct is mixed with the desired amount of outside air and is supplied into the passenger compartment from above, thereby achieving the above purpose. be.

(Example) An example of this invention will be described below with reference to the drawings.
1 and 2, an air conditioning duct is shown attached to, for example, a bus. This air conditioning duct includes first and second blowout ducts 1 and 2,
It is composed of first and second connecting ducts 3 and 4 and an outside air introduction duct 5, and can be air-conditioned by a first damper 6 and a second damper 7.

The first blow-off duct 1 is attached to both shoulders of the ceiling of the vehicle body, and is provided over almost the entire length of the vehicle body in the front and rear directions along the vehicle traveling direction. Further, the second blow-off duct 2 is provided on both left and right sides of the floor 9 along the vehicle traveling direction, extending almost the entire length of the vehicle body. A plurality of air outlets 10 are formed in each of the first and second air outlet ducts 1 and 2 in the longitudinal direction, and air is cooled or heated through these first and second air outlet ducts 1 and 2. can be supplied into the vehicle interior.

The first connecting duct 3 is installed under the floor 9 at the front of the vehicle body, and is provided along the direction perpendicular to the traveling direction of the vehicle body over almost the entire length of the vehicle width. Approximately at the center of the first connecting duct 3, there is a connecting portion 3a that extends toward the rear of the vehicle and connects to an air conditioner 11, which will be described below.
is provided, with both left and right ends extending upward, respectively.
It penetrates the floor 9 and is connected to the second blowout duct 2. As shown in FIG. 3, the air conditioner 11 includes an electric motor 12 driven by a compressor 30 (the electric motor is driven by switching the clutch 14), a blower 15 driven by a dedicated engine 13, etc.
An evaporator 16 and a heater core 17 are arranged on the windward side of the blower 15, and air is sucked from the air inlet 18 by rotation of the blower, and after this air is cooled or heated by the evaporator 16 and the heater core 17, The air is sent out into the first connecting duct 3 from an air outlet 19 connected to the connecting portion 3a. 31 is the evaporator 16 of the air conditioner 11;
A compressor 30 and a condenser constitute a cooling cycle, and 32 is a radiator of the dedicated engine 13.

The second connecting duct 4 has one end connected to the first connecting duct 3 and the other end connected to the first blowing duct 1. Second connecting duct 4
In this embodiment, the first connecting duct 3
They are provided symmetrically at two locations on the left and right of the vehicle, and extend parallel to the underfloor from the first connecting duct 3 toward the front of the vehicle body, and are provided with curved portions 4a that bend at right angles near the front end of the vehicle to connect adjacent vehicle bodies. It extends toward the side wall 20 and further rises along the side wall 20 to reach the first blowout duct 1.

The outside air introduction duct 5 is connected to the second connection duct 4 under the floor 9, extends from the second connection duct 4 toward the front of the vehicle body, and opens to the outside of the vehicle from the front end of the vehicle body via the blower device 21. are doing. Air blower 2
1 stores, for example, a Shirotsukou fan 22 in a fan storage case 23, and a motor 24 fixed to the fan storage case 23 operates the Shirotsukou fan 22.
The structure is such that air is sucked in from an outside air intake port 25 formed in the fan storage case 23 by rotating the fan storage case 23, and air is sent out from an outside air outlet 26 formed in the fan storage case 23. Therefore, the outside air introduction duct 5 is connected to the outside air intake port 25 of the blower device 21.
Windward side duct piece 5a leading from the front end of the vehicle body
and a duct piece 5b on the lee side leading from the outside air outlet 26 of the blower 21 to the second connecting duct 4. Particularly in this embodiment, the duct piece 5b on the leeward side is divided into two parts, each of which is connected to each of the curved parts 4a, 4a of the second connecting ducts 4, 4,
The outside air drawn into the outside air introduction duct 5 by the operation of the blower 21 can be sent into both the second connecting ducts 4, 4 at the same time.

The first damper 6 is rotatably attached to the connecting portion between the first connecting duct 3 and the second connecting duct 4, and closes the second connecting duct as shown in FIG. The blocking position (position of broken line a),
The position where the part of the first connecting duct leading to the second blow-off duct 2 is closed and blocked (the position indicated by the solid line c), the first
and a position where the ratio of the air volume sent to the second blow-off ducts 1 and 2 is approximately 2:8 to 3:7 (the position indicated by the broken line b).

The second damper 7 is rotatably attached to the connection portion of the outside air introduction duct 5 with the second connection duct 4, and is located at a position where the second connection duct 4 is blocked (the position indicated by the broken line d). ) to the position where the outside air introduction duct 5 is closed and cut off (the position indicated by the solid line f), it is possible to continuously switch to a desired position (the position indicated by the broken line e or e').

In the above configuration, when cooling the inside of the vehicle, the evaporator 16 of the air conditioner 11 is operated, the first damper 6 is set to the position c, the second damper 7 is set to the position f, and the blower 21 is stopped. As a result, the air inlet 1 of the air conditioner 11
8 is sucked in by the rotation of the blower 15, is cooled by the evaporator 16, and is guided into the second connecting duct 4 via the first connecting duct 3,
Air is supplied into the vehicle interior from a first blowout duct 1 provided on the ceiling of the vehicle interior through an outlet 10.

When heating the vehicle interior, particularly when strong heating is required, the heater core 17 of the air conditioner 11 may be activated and the first damper 6 may be moved to position a. In this case, the second damper 7 may be located at any position, but the blower device 21 is stopped. As a result, the air sucked from the air inlet of the air conditioner 11 by the rotation of the blower 15 is
The first damper 6 is heated by the heater core 17
is sent only to the second blow-off duct 2 under the guidance of
The air is supplied into the vehicle interior from the air outlet 10 of the second air duct 2.

During normal heating, the first damper 6 is placed at position b, the second damper is placed at position f, and the blower 21 is kept in a stopped state. By this operation, the air heated by the heater core 17 is sent to the first blowout duct 1 at a rate of 2 to 3, and to the second blowout duct 2 at a rate of 7 to 8, and is sent to the passenger compartment. Equal amounts of hot air are supplied from above and below.

In order to finely adjust the temperature of the upper part of the seat during the above-mentioned normal heating, it is sufficient to operate the air blower 21 and rotate the second damper 7 to the desired positions e and e'. As a result, the heated air sent into the second connecting duct 4 is mixed with a desired amount of outside air sucked into the outside air introduction duct 5 by the blower 21 according to the position of the second damper 7, and It is capable of supplying warm air at an appropriate temperature to the upper part.

In addition, if the operation of the air conditioner 11 is stopped, the second damper 7 is set to the position d, and the blower device 21 is operated, only outside air can be supplied into the passenger compartment, and the air inside the passenger compartment can be effectively It allows for ventilation.

Further, in this embodiment, the second damper 7 is
This second damper 7 is provided at the connection part of the outside air introduction duct 5 with the second connection duct 4.
For example, as shown in FIG. 5, the same effect can be obtained even if it is provided in the windward part of the blower, that is, in the windward side duct piece 5a of the outside air introduction duct 5.

(Effects of the invention) As described above, according to this invention, the first connection duct leading to the air conditioner is connected to the second blowout duct installed under the floor, and the first connection duct installed on the ceiling of the vehicle A second connecting duct that connects to the first connecting duct is connected to the blow-off duct, an outside air introduction duct that opens to the outside of the vehicle via a blower is connected to the second connecting duct, and the second connecting duct is connected to the first connecting duct. Since the first damper is provided at the connection between the air conditioner and the second connecting duct, and the second damper is provided at the outside air introduction duct, the desired outside air can be added to the air sent from the air conditioner to the second connecting duct. It is possible to finely adjust the temperature of the air supplied from overhead into the vehicle interior to create a comfortable temperature distribution in the vehicle interior with a cool head and warm feet. It also has the advantage that the interior of the vehicle can be effectively ventilated by introducing outside air from the outside air introduction duct.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of this invention, Figure 2 is a sectional view showing an embodiment of this invention.
The figure is a plan sectional view of the same as above, Figure 3 is a plan view showing the air conditioner used in the same as above, Figure 4 is a simplified diagram of an air conditioning duct used to explain air conditioning operation, and Figure 5 is another embodiment of this invention. A simplified diagram showing. 1... First blow-off duct, 2... Second blow-off duct, 3... First connection duct, 4... Second connection duct, 5... Outside air introduction duct, 6... First
damper, 7... second damper, 21... air blower.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A first air duct installed on the ceiling of the car body in the direction of vehicle travel, a second air duct installed under the floor or under the seat in the same direction of vehicle travel, and a second air duct installed under the floor. a first connecting duct connected to the air conditioner connected to the air conditioner and communicating with the second outlet duct, and a second connecting duct having one end connected to the first connecting duct and the other end connected to the first outlet duct. duct, and connected to the second connecting duct;
an outside air introduction duct that opens to the outside of the vehicle through a blower, and the first blowout duct and the second blowout duct are connected to the connection portion between the first connection duct and the second connection duct. A first damper is provided to adjust the amount of air sent to each of the ducts, and a second damper is provided to the outside air introduction duct to adjust the amount of outside air sent into the second connecting duct. A vehicle air conditioning duct characterized by: 2. The air conditioning duct for a vehicle according to claim 1, wherein the second damper is provided on the windward side of the blower.