JPH09286227A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an air temperature in a roof side duct from increasing and to prevent a driver from feeling unpleasant by flowing a part of wind from an instrument panel side air conditioner into a car room through small openings when an instrument panel side air conditioner is kept in ON and a ceiling side air conditioner is kept in OFF. SOLUTION: One or a plurality of small openings are dispersedly formed at a place different from a blowing-out port of a front louver 16 on the front longitudinal wall 172 corresponding to the downstream end of the air conditioned wind of a duct 17 to keep the duct and a car room in a communicating state. Even if an air conditioning control is stopped and an air conditioning ceiling unit 6 is stopped to close a side louver 15 and the front louver 16, if an air conditioning instrument panel unit 3 is in a driving state, a part of air conditioned wind from the air conditioning instrument panel unit 3 is passed through a duct 8, a longitudinal duct 40, a ceiling duct 17 and leaks into the car room little by little through the small openings 49 to interchange the air in the ceiling duct 17 little by little.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to an air conditioner in which an air conditioning air duct for an instrument panel side air conditioner arranged on an instrument panel communicates with a ceiling duct supported on the roof side. Regarding

[0002]

2. Description of the Related Art Conventionally, in an air conditioner for a passenger compartment, the air conditioner is controlled so that the temperature distribution in the passenger compartment is in a hot and cold condition in order to reduce the burning of the passenger's face due to the influence of sunlight or the like inserted into the passenger compartment. In trucks and the like, there is an air conditioner as disclosed in the specification and drawings of Japanese Patent Application No. 8-29473 already filed by the present applicant. As shown in FIG. 6, in this air conditioner, a duct 05 is extended from an air conditioner unit 03 in an instrument panel 02 arranged in a cab 01, the duct is communicated with a vertical duct 04 near a pillar portion, and further, Communicates with the roof side duct 06. In order to control the temperature distribution in the passenger compartment with the air conditioner by using this air conditioner, the air conditioning air from the air conditioning unit 03 is guided to the roof side duct 06, and the air conditioning air is blown from the side louvers 07 and the front louvers 08, The temperature inside the upper part of the room is prevented from rising.

[0003]

As described above, the louver on the roof side is effectively used in the head cold foot thermal operating area. However, in the case where the air conditioning instrument panel unit is continuously operated by keeping the louver closed in an inoperative state, the following problem occurs. That is, the air in the roof-side duct does not stay and is not mixed with the air in the passenger compartment. The ceiling portion is located in a position where it is easy to raise the temperature in the passenger compartment, and the air in the duct is further raised by the radiant heat of the solar radiation hitting the roof.

After such a state continues, it is assumed that the operation mode is switched to the head cold foot thermal operation area again and the operation state is switched to the operation in which the louver on the roof side is opened. Then, the air, which has been heated in the roof side duct, is blown out from the louver on the roof side to the upper part of the passenger compartment, hitting the occupant's face or the vicinity of the head, and the occupant feels discomfort. An object of the present invention is to provide an air conditioner capable of preventing the temperature of the air in the duct on the roof side from rising and preventing the occupant from feeling uncomfortable when the louver is activated again (open state). To provide.

[0005]

In order to achieve the above-mentioned object, according to the invention of claim 1, an instrument panel side air conditioner arranged in an instrument panel portion of a vehicle and a ceiling side arranged in a roof portion of the vehicle. An air conditioner, comprising: an air conditioner in which each duct of the instrument panel side air conditioner and the ceiling side air conditioner are in communication with each other, in the vicinity of the blowout louver disposed in the ceiling duct or at the downstream end of the conditioned air, a narrow mouth is provided, When the inner panel side air conditioner is kept on and the ceiling side air conditioner is kept off, part of the air blown from the instrument panel side air conditioner is made to flow from the narrow mouth into the vehicle compartment.

The invention of claim 2 is provided with an instrument panel side air conditioner arranged in a vehicle instrument panel portion, and a ceiling duct arranged in a roof portion of the vehicle and communicating with a duct of the instrument panel side air conditioner. In the air conditioner, a narrow mouth is provided in the vicinity of the blowing louver arranged in the ceiling duct or at the downstream end of the conditioned air, the instrument panel side air conditioner is turned on, and the blowing louver communicating with the ceiling duct is turned on.
When the FF state is maintained, a part of the air blown from the instrument panel side air conditioner is caused to flow from the narrow mouth into the passenger compartment.

[0007]

1 shows an air conditioner to which the present invention is applied. This air conditioner is installed in the cab of the truck, and has a well-known configuration except for a ceiling duct 17 and its related parts described later. Here, an air conditioning instrument panel unit 3 which is a main part of the air conditioning instrument panel side air conditioner is arranged in the instrument panel 2 of the cab 1, and an air conditioning system which is a main part of the air conditioning ceiling side air conditioner is provided between the roof panel 4 and the headlining 5. The ceiling unit 6 is arranged.

As shown in FIG. 1, the air conditioning instrument panel unit 3 constitutes a main part of the air conditioning instrument panel side air conditioner, and comprises a blower (not shown) mounted in the instrument panel 2, an instrument panel evaporator on the downstream side, and an instrument panel evaporator on the downstream side. A heater, an air mix damper, and an outlet switching damper are provided. The conditioned air from the air conditioning instrument panel unit 3 is blown through the ducts 7 and 8 from the grills 9, 10 and 11 such as DEF, FACE and FOOT when necessary. The blowing angles of the grills 9, 10 and 11 are appropriately adjusted by a lever for adjusting the blowing angle (not shown).

The roof panel 4 of the cab 1 has a heat insulating material 12 attached to the entire inner surface thereof. A wide space 13 is provided between the heat insulating material and the headlining 5.
Are formed. Back panel 1 at the rear of space 13
An air conditioning ceiling unit 6 is housed in the vicinity of 4. Moreover, the head lining 5 faces the driver's seat and the right side peripheral portion and the front side peripheral portion thereof bulge downward, and the head lining 5 is placed in the internal space thereof.
The L-shaped ceiling duct 17 is accommodated in a plan view as shown in FIG. The base end of the ceiling duct 17 is communicated with the air conditioning ceiling unit 6, and a side louver 15 is provided at a side position facing the driver's seat and a front louver 16 is provided at a front position facing the driver's seat. In particular, the vertical duct 40 is connected to the bottom of the bent portion 171 of the ceiling duct 17, and the lower end of the vertical duct 40 is connected to the tip of the duct 8 of the air conditioning instrument panel unit 3. As a result, the vertical duct 40 can guide a part of the conditioned air of the air conditioning instrument panel unit 3 to the ceiling duct 17.

As shown in FIG. 2, the air conditioning ceiling unit 6 supported by the roof panel 4 includes a ceiling evaporator 19
And a blower 18 downstream thereof and a damper 27 for opening and closing a bypass passage 29 arranged in parallel with the ceiling evaporator 19. The conditioned air from the air conditioning ceiling unit 6 is blown out from the side louvers 15 and the front louvers 16 whose opening and closing are controlled by signals from a controller (not shown). As shown in FIGS. 3 and 4, the side louvers 15 (the front louvers 16
Also has a similar structure), and is a long tubular rotating tubular portion 152 slidably supported by the wall portion of the duct 17 and communicating with the duct 17, and an outlet formed in the longitudinal direction of the tubular portion. 1
53, a lever 151 for rotating the rotary cylinder portion 152 around its center line within a range of a blowing angle Cf, and a duct 17
The fixed louver 154, which is supported by the louver 154, is in sliding contact with the vicinity of the air outlet 153 of the rotary tubular portion 152 and regulates the fluctuation range of the air outlet angle.

Here, as shown in FIGS. 1 and 2, a front louver 16 is provided in a portion of the duct 17 which is located in front of the driver's seat, and the outlet 1 of the front louver is provided.
One or a plurality of narrow ports 49 are formed on the tip vertical wall 172, which is a part different from 63 and corresponds to the downstream end of the conditioned air of the duct 17, so that the inside of the duct communicates with the vehicle interior. Held in a state. In such a state,
When the air conditioning instrument panel unit 3 is driven, the supply of air conditioning air to the ducts 7 and 8 is continued, the difference between the outside air temperature and the set temperature in the vehicle compartment can be maintained, and the air conditioning ceiling unit 6 is driven. Air-conditioning air from the unit is blown out from the side louvers 15 and the front louvers 16 via the ceiling duct 17, and air-conditioning control for head cold foot heat is performed.

During this time, even if the air conditioning control of the cold head foot heat is stopped, the air conditioning ceiling unit 6 stops driving, and the side louvers 15 and the front louvers 16 are turned off (closed), the air conditioning instrument panel unit 3 remains in the driven state. If so, part of the conditioned air from the air conditioning instrument panel unit is duct 8, vertical duct 4
After passing through the ceiling duct 17, the air leaks from the narrow mouth 49 into the vehicle compartment little by little, and the air in the ceiling duct 17 is replaced little by little. After this, again due to changes in the status of solar radiation and fluctuations in the outside air temperature, the average temperature in the passenger compartment deviates from the allowable range of set temperatures, or due to changes in the direction of solar radiation
When the temperature of the head of the passenger compartment rises, the air conditioning ceiling unit 6 is turned on by an air conditioning controller (not shown).

When the air conditioning ceiling unit 6 is re-driven, the side louvers 15 and the front louvers 16 first blow out the conditioned air from the air conditioning instrument panel unit 3 supplied into the ceiling duct 17 into the passenger compartment, and then the air conditioning. The conditioned air is blown from the ceiling unit 6. In this case, since the air in the ceiling duct 17 that is blown out first is maintained at approximately the air temperature in the vehicle interior because it is sequentially replaced by the conditioned air from the air conditioning instrument panel unit 3 as described above, The air blown out from the louver 15 and the front louver 16 does not give a driver an unpleasant feeling. In the above-mentioned process, the narrow holes 49 are set by appropriately determining the appropriate number and the appropriate number in consideration of the amount of the conditioned air leaking from each of the narrow holes.

Another embodiment of the present invention will be described with reference to FIG.
The air conditioner here is different from the air conditioner of the above-described embodiment in that the air conditioning ceiling unit is eliminated and the ceiling duct 1
7a has the same configuration except that 7a is different. Here, the same members are denoted by the same reference numerals, and duplicate description is omitted.

The ceiling duct 17a shown in FIG. 5 has a vertical duct 40a connected to the bottom of the bent portion 171a, and the lower end of the vertical duct 40a is at the tip of the duct 8 (see FIG. 1) of the air conditioning instrument panel unit 3. Be connected. This allows
The vertical duct 40a can guide a part of the conditioned air of the air conditioning instrument panel unit 3 to the ceiling duct 17a. In the ceiling duct 17a, a side louver 1 is provided at a side position facing the driver's seat.
5, front louvers 16 are provided at front positions facing the driver's seat.

In this case as well, the front louver 16 is provided in a portion of the ceiling duct 17a which is located in front of the driver's seat, and is a portion different from the outlet 163 of the front louver, and the air-conditioning air of the ceiling duct 17a. One or more narrow mouths 4 are dispersed on the tip vertical wall 172a corresponding to the downstream end.
9 (only one shown in FIG. 5) is formed. Similarly,
A side louver 15 is provided at a portion of the ceiling duct 17a which is located on the side facing the driver's seat and is a portion different from the outlet 153 of the side louver.
On the rear end vertical wall 173 corresponding to the downstream end of the conditioned air of a, one or a plurality of narrow mouths 49 (only one is shown in FIG. 5) are formed. By these narrow ports 49, the interior of the ceiling duct 17a and the vehicle compartment are held in communication with each other.

In such a structure, when the air conditioning instrument panel unit 3 is driven, the supply of the air conditioning air to the ducts 7 and 8 is started, and the difference between the outside air temperature and the set temperature in the vehicle compartment is maintained, so that the time is maintained. A part of the conditioned air of the air conditioning instrument panel unit 3 is blown out from the side louvers 15 and the front louvers 16 via the duct 8, the vertical duct 40a, and the ceiling duct 17a, and the air conditioning control of head cold foot heat is performed. On the other hand, the air conditioning control of head cold foot heat is stopped at a proper time, and the side louver 15 and the front louver 16 are
Is turned off (closed). During this time, the air conditioning instrument panel unit 3 continues the air conditioning operation at a low level, and a part of the air conditioning airflow at that time passes through the ceiling duct 17a and passes through the tip vertical wall 17.
2a and the small holes 49 on the side of the rear end vertical wall 173 will leak little by little into the passenger compartment. Therefore, the ceiling duct 17
The air inside is sequentially replaced little by little by the conditioned air from the air conditioning instrument panel unit 3.

After this, when the temperature of the head of the passenger compartment rises again, an air conditioner controller (not shown) returns to the air conditioning control for the cold head heat and the side louvers 15 and the front louvers 16 are turned on.
I do. In this case as well, the air in the ceiling duct 17 is blown into the passenger compartment and then the conditioned air from the air conditioning instrument panel unit 3 is blown out. However, the air in the ceiling duct 17a receives the conditioned air from the air conditioning instrument panel unit 3 and is sequentially replaced. As a result, the air temperature in the passenger compartment is almost the same, and the air blown out first by the side louvers 15 and the front louvers 16 does not make the driver feel uncomfortable.

Further, in each of the fuel injection devices to which the invention of the present application is applied (see FIGS. 1 and 5), the narrow throat 49 is provided at the downstream end of the conditioned air. A configuration may be adopted in which a narrow mouth is provided in the vicinity of the louver 16, and in this case as well, at least the side louver 15 or the front louver out of the hot air staying in the duct 17 when the side louver 15 or the front louver 16 is closed. Since the hot air in the vicinity of 16 parts leaks from the narrow mouth, substantially the same effect as the above-mentioned embodiment can be obtained.

[0020]

As described above, according to the invention of claim 1, the respective ducts of the instrument panel side air conditioner and the ceiling side air conditioner are communicated with each other, and the ducts of the ceiling side air conditioner are in the vicinity of the blowing louver or downstream of the conditioned air. Since a narrow mouth is provided at the end, even if the air conditioner on the ceiling side is off, if the air conditioner on the instrument panel side is on, a part of the conditioned air from the air conditioner on the instrument panel side will pass through the ceiling duct and the narrow mouth. It will be blown out into the vehicle interior. Therefore, when the ceiling side air conditioner is switched to the operating state again, the temperature of the air blown by the blowing louver does not rise, and the passenger's discomfort can be eliminated.

According to the second aspect of the present invention, since the ceiling duct communicating with the duct of the instrument panel side air conditioner is provided with a narrow mouth near the blowing louver or at the downstream end of the air conditioning wind, it communicates with the ceiling duct. Speech louver is OFF
Even in this state, if the instrument panel-side air conditioner is in the ON state, a part of the conditioned air from the instrument panel-side air conditioner is blown into the vehicle interior through the ceiling duct and the narrow mouth. Therefore, when the blowing louver is switched to the ON state again, the temperature of the air blown by the blowing louver does not rise, and the passenger's discomfort can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view of a cab of a vehicle provided with an air conditioner according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an air conditioning ceiling unit used in the air conditioner of FIG.

FIG. 3 is a schematic cross-sectional view of an outlet of a side louver used by the air conditioner of FIG.

FIG. 4 is a partially enlarged front view of an outlet of the side louver of FIG.

FIG. 5 is a schematic plan view of a ceiling duct used in an air conditioner according to another embodiment of the present invention.

FIG. 6 is a schematic perspective view of a conventional air conditioner installed in a cab of a vehicle.

[Explanation of symbols]

 1 Cab 2 Instrument panel 3 Air conditioning instrument panel unit 4 Roof panel 6 Air conditioning ceiling unit 7,8 Duct 15 Side louver 16 Front louver 17 Ceiling duct 17a Ceiling duct 172a Tip vertical wall 173 Rear end vertical wall 19 Ceiling evaporator 18 Blower 40 Vertical Duct 49 narrow mouth

Claims (2)

[Claims] 1. An instrument panel side air conditioner arranged in a vehicle instrument panel portion and a ceiling side air conditioner arranged in a roof portion of the vehicle, wherein the ducts of the instrument panel side air conditioner and the ceiling side air conditioner are connected to each other. In the above air conditioner, when a narrow mouth is provided in the vicinity of the blowing louver arranged in the ceiling duct or at the downstream end of the conditioned air, the inner panel side air conditioner is kept on and the ceiling side air conditioner is kept off. In addition, a part of the air blown from the instrument panel side air conditioner is caused to flow from the narrow mouth into the vehicle compartment. 2. An air conditioner comprising an instrument panel side air conditioner arranged in an instrument panel part of a vehicle and a ceiling duct arranged in a roof part of the vehicle and communicating with a duct of the instrument panel side air conditioner. A narrow mouth is provided in the vicinity of the blowout louver arranged in the ceiling duct or at the downstream end of the conditioned air, and the instrument panel side air conditioner is turned on and the blowout louver communicating with the ceiling duct is held in the off state. It is characterized in that a part of the air blown from the side air conditioner is made to flow from the narrow mouth into the vehicle compartment.