JP3972445B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner that can blow out to the upper body of a rear seat occupant.
[0002]
[Prior art]
2. Description of the Related Art A vehicle air conditioner is known in which a rear vent duct is connected to a downstream side of a temperature control means of an air conditioning unit to blow temperature control air to a passenger in a rear seat.
[0003]
[Problems to be solved by the invention]
In the air conditioner described above, when the rear vent is opened and closed in the differential mode where a predetermined air volume is required to ensure visibility, the differential air volume changes greatly, and as a result, the differential performance is greatly affected by the opening and closing of the rear vent. End up.
[0004]
OBJECT OF THE INVENTION
An object of the present invention is to provide a vehicle air conditioner in which a rear vent duct is connected to an air conditioning unit, and the vehicle air conditioner can suppress fluctuations in differential air volume even when the rear vent is opened and closed.
[0005]
[Means for Solving the Problems]
[Means of Claim 1]
According to the first aspect of the present invention , the cold air on the upstream side of the temperature adjusting means is guided to the rear vent duct by the cold air bypass passage , so that the fluctuation of the differential air volume can be suppressed even when the rear vent is opened and closed in the differential mode.
In addition, a cold air bypass opening that communicates with the downstream of the temperature control means is provided in the cold air bypass passage, and the cold air bypass door that changes the passage area of the cold air bypass passage is linked to the blowout mode of the air conditioning unit to When the bypass passage is opened, the cold air upstream of the temperature adjustment means is led to the rear vent duct via the cold air bypass passage, and further to the face outlet through the cold air bypass passage and the cold air bypass opening, downstream of the temperature adjustment means, When the cold air bypass passage is closed during the foot or differential mode, the temperature-controlled air temperature-controlled by the temperature adjusting means is guided to the rear vent duct through the cold air bypass opening and the cold air bypass passage. In other words, the cool air that has passed through the cool air bypass passage is blown to the rear seat side and the face outlet in the face and bi-level modes, so that cool air to the rear seat can be secured in the face mode, and the cool air bypass opening is passed in the bi-level mode. A part of the cool air blown out from the face outlet can ensure a temperature difference between the upper and lower sides. In the foot or differential mode, the temperature-controlled air that has passed through the cold-air bypass opening and the cold-air bypass passage can be blown from the downstream side of the temperature adjustment means to the rear seat side.
[0006]
[Means of claim 2]
According to the second aspect of the present invention, the cold air bypass door is linked to the air mix door and the passage area of the cold air bypass passage is squeezed to the maximum at the time of max hot so that there is no problem that the cold air blows out to the rear seat side during heating.
[0009]
[Means of claim 3 ]
As in claim 3 , the cold air bypass door is interlocked with the air mix door, and the cold air bypass passage is closed at a predetermined opening degree or more on the hot side, whereby temperature-controlled air is blown out to the rear seat side during heating.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described based on a plurality of examples and modifications.
[First embodiment]
1 and 2 show a first embodiment. FIG. 1 is a schematic diagram of a vehicle air conditioner, and FIG. 2 is a schematic diagram of a main part of an air conditioning unit.
The vehicle air conditioner includes an air conditioning unit 1 for mainly performing air conditioning on the front seat side of the vehicle, and a rear vent duct 2 connected to the air conditioning unit 1 for blowing cold air to the upper body of the passenger in the rear seat. .
[0011]
The air conditioning unit 1 is a unit capable of blowing cold air to hot air, a duct 3 that blows out an air flow into the vehicle interior, a blower 4 that generates an air flow toward the vehicle interior via the duct 3, Cooling means 5 (for example, an evaporator) that cools the air that is disposed upstream and cools, and temperature adjustment means 6 that adjusts the blowing temperature by changing the ratio of cold air and hot air downstream in the duct 3. .
The temperature adjusting means 6 is disposed downstream of the cooling means 5 and heats the air passing therethrough, a bypass passage 8 that bypasses the heating means 7, hot air that passes through the heating means 7, and a bypass passage And an air mix door 9 that adjusts the ratio of the cool air passing through 8.
[0012]
The air conditioning unit 1 also includes a differential outlet 10, a face outlet 11, and a foot outlet (not shown) on the downstream side of the temperature control means 6, and each outlet is opened and closed by a door (not shown). The air-conditioning unit 1 mainly blows out cool air to the upper body of the front seat occupant, blows cold air into the upper body of the occupant, and bi-level mode of blowing out hot air to the occupant's feet, and mainly blows out hot air to the occupants' feet A foot mode and a differential mode that mainly blows warm air to the window glass are provided so as to be selectable manually or automatically.
[0013]
Further, on the downstream side surface of the air conditioning unit 1 (specifically, the side surface of the heater unit), a cold air bypass that guides the cold air cooled by the cooling means 5 directly to the rear vent duct 2 by bypassing the temperature adjusting means 6. A passage 12 is formed, and a rear vent outlet 13 for connecting the rear vent duct 2 is provided downstream of the cold air bypass passage 12.
The cold air bypass passage 12 is a substantially flat passage along the side surface of the duct 3, and its passage resistance is larger than the passage resistance on the temperature adjusting means 6 side. In addition, the shape of the cold air bypass passage 12 shown in this embodiment is an example, and may be a shape other than the flat shape.
[0014]
The rear vent duct 2 is a duct connected to the cold air bypass passage 12 of the air conditioning unit 1, and a rear vent grill 14 for blowing the cold air toward the upper body of the rear seat occupant is provided at the downstream end thereof. The rear vent grill 14 is provided with a grill shut (not shown) so that the rear vent grill 14 can be opened and closed by a passenger in the rear seat.
[0015]
[Operation of Example]
When it is desired to eliminate the haze of the rear seat head during heating, such as when cooling down, or by opening the rear vent grill 14 with a grill shut, the cold air that has passed through the cooling means 5 is cooled by the cold air bypass passage. 12 and rear vent grill 14 through rear vent duct 2.
When it is not necessary to blow out the cool air to the rear seat, the rear vent grill 14 is closed with the grill shut so that the cold air is not blown to the rear seat.
[0016]
[Effects of Examples]
In the vehicle air conditioner of the present embodiment, the cold air that bypasses the temperature control means 6 is guided to the rear vent duct 2 by the cold air bypass passage 12 dedicated to the rear vent. For this reason, even if the rear vent grill 14 is opened and closed by the grill shut, the fluctuation of the air volume blown out from each outlet on the front seat side is suppressed.
In other words, even when the rear vent grill 14 is opened and closed by the grill shut in the differential mode where a predetermined air volume is required to ensure visibility, fluctuations in the differential air volume can be suppressed, resulting in an effect on the differential performance. Can be kept small.
[0017]
[Second Embodiment]
FIG. 3 is a schematic view of the main part of the heater unit.
The cold air bypass passage 12 of the present embodiment is provided with a cold air bypass door 15 that can change the passage area from fully closed to fully open. The cold air bypass door 15 is operated in conjunction with the air mix door 9, and at the time of max cool (when the heating means 7 is fully closed by the air mix door 9), the cold air bypass passage 12 is fully opened, and at the time of max hot ( When the heating means 7 is fully opened by the air mix door 9, the cold air bypass passage 12 is provided to be fully closed.
By providing in this way, it is not necessary to close the rear vent grill 14 with a grill shut during heating.
[0018]
[Third embodiment]
FIG. 4 is a schematic view of the main part of the heater unit.
As in the second embodiment, the cold air bypass passage 12 is provided with a cold air bypass door 15 that changes the passage area from fully closed to fully open. The cold air bypass passage 12 on the downstream side of the cold air bypass door 15 is formed with one or a plurality of cold air bypass openings 16 communicating with the downstream of the temperature control means 6.
[0019]
The cold air bypass door 15 of this embodiment operates in conjunction with each blowing mode. The cold air bypass passage 12 is opened in the face and bi-level modes, and the cold air bypass passage 12 is closed in the foot and differential modes. It is.
In the face mode, as shown in FIG. 4A, the cold air bypass passage 12 is fully opened, so that the cold air to the rear seat is secured.
Also in the bi-level mode, as shown in FIG. 4A, when the cold air bypass passage 12 is opened, a part of the cold air that has passed through the cold air bypass opening 16 blows out from the face air outlet 11 (see FIG. 1). As a result, a temperature difference between the upper and lower sides can be secured.
[0020]
In the foot and differential mode, as shown in FIG. 4B, the cold air bypass passage 12 is closed, so that the temperature-controlled air temperature-controlled by the temperature adjusting means 6 is passed through the cold air bypass opening 16 through the rear vent duct. As a result, the temperature-controlled air is blown out to the rear seat side.
The opening area of the cold air bypass opening 16 is tuned so that the influence of the differential air volume due to the opening and closing of the rear vent grill 14 is suppressed.
[0021]
[Modification]
In the third embodiment, the cold wind bypass door 15 is linked to each blowing mode. However, the cold wind bypass door 15 may be opened and closed independently, or linked to the air mix door 9. Also good.
When the cold air bypass door 15 is opened and closed independently, the temperature blown out through the rear vent duct 2 can be varied in the range of cold air to temperature-controlled air.
Further, by providing the cold air bypass door 15 in conjunction with the air mix door 9 so as to close the cold air bypass passage 12 at a predetermined opening or more on the hot side, temperature-controlled air is blown out to the rear seat side during heating.
[Brief description of the drawings]
FIG. 1 is a schematic view of a vehicle air conditioner (first embodiment).
FIG. 2 is a schematic view of a main part of an air conditioning unit (first embodiment).
FIG. 3 is a schematic view of a main part of a heater unit (second embodiment).
FIG. 4 is a schematic view of a main part of a heater unit (third embodiment).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air conditioning unit 2 Rear vent duct 6 Temperature control means 7 Heating means 8 Bypass passage 9 Air mix door 12 Cold air bypass passage 13 Rear vent outlet 14 Rear vent grill 15 Cold air bypass door 16 Cold air bypass opening

Claims (3)

A temperature control means comprising a heating means for heating the air passing therethrough, a bypass passage bypassing the heating means, and an air mix door for adjusting a ratio of hot air passing through the heating means and cold air passing through the bypass passage together comprising, defroster air outlet, a face outlet, provided with a foot outlet, and the air conditioning unit to blow out temperature control air from the respective outlet of the vehicle front, the upper body of the rear-seat occupant to the air blown out from the air-conditioning unit A rear vent duct that blows out toward the vehicle air conditioner,
The air conditioning unit includes a cold air bypass passage that guides the cold air supplied from the upstream side of the temperature control means to the rear vent duct by bypassing the temperature control means,
The cold air bypass passage includes a cold air bypass door that changes the passage area on the upstream side of the cold air bypass passage, and a cold air bypass opening that communicates with the downstream of the temperature control means on the downstream side of the cold air bypass door,
The cold air bypass door is linked to the air blowing mode of the air conditioning unit, opens the cold air bypass passage in the face mode and the bi-level mode, and the cold air that has passed through the cold air bypass passage passes the rear bend duct through the rear bend duct. While being blown out toward the upper body of the seat occupant, a part of the cold air that has passed through the cold air bypass opening from the cold air bypass passage is blown out from the face air outlet from the downstream of the temperature control means,
Further, the cold air bypass door closes the cold air bypass passage during the foot mode and the differential mode, and the temperature-controlled air temperature-controlled by the temperature adjusting means is passed through the cold air bypass opening and the cold air bypass passage to the rear vent duct. A vehicle air conditioner that is guided and blown to the rear seat side . The vehicle air conditioner according to claim 1,
The cold air bypass passage includes a cold air bypass door that changes the passage area,
The cold air bypass door is interlocked with the air mix door, and restricts the area of the cold air bypass passage to the maximum during the max hot. The vehicle air conditioner according to claim 1 ,
The cold air bypass door is interlocked with the air mix door, and closes the cold air bypass passage at a predetermined opening degree or more on the hot side.

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