JP3972492B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner capable of blowing out temperature-controlled air temperature-controlled by an air conditioning unit to 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 temperature control means of an air conditioning unit to blow temperature control air to a rear seat passenger.
[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 a vehicle air conditioner in which a rear vent duct is connected to an air conditioning unit, which supplies temperature-controlled air to a rear seat occupant and can suppress fluctuations in the differential air volume even when the rear vent is opened and closed. The provision of an air conditioner for vehicles.
[0005]
[Means for Solving the Problems]
[Means of Claim 1]
As in claim 1, the air outlet and the air inlet of the cold air bypass passage are opened on the rear side of the side surface of the duct of the air conditioning unit, and the differential air outlet that mainly blows warm air to the window glass is the side surface of the duct of the air conditioning unit. The rear vent duct is connected to the downstream of the temperature control means so that the outlet of the bypass passage is provided above the air intake so that the cool air blows out near the air intake. Therefore, the air temperature-controlled by the temperature adjusting means can be blown out toward the upper body of the rear seat occupant through the rear vent duct.
Since the cold air is guided by the cold air bypass passage above the rear vent duct in the vicinity of the air intake, the temperature-controlled air blown toward the upper body of the rear passenger is shifted to the cold air side through the rear vent duct. As a result, passenger comfort is improved.
In the differential mode, the rear vent blowing air is throttled or closed by the rear vent door interlocked with the blowing mode, so that fluctuations in the differential air volume can be suppressed even when the rear vent is opened and closed in the differential mode.
[0006]
[Means of claim 2]
According to claim 2, the air intake of the rear vent duct is provided in the middle or downstream of the side surface of the air conditioning unit, and the cold air bypass passage is formed up to the upstream, thereby reducing the ventilation resistance of the cold air bypass passage, The amount of cold air passing through the passage can be increased.
Further, since the air intake port of the rear vent duct is provided on the downstream side, the distance at which the air temperature-controlled by the temperature adjusting means is agitated is increased, and the air mixing property is improved.
[0007]
[Means of claim 3]
According to the third aspect of the present invention, the cold air bypass passage is closed by the air mix door at the time of max hot, so that there is no problem that the cold air blows out to the rear seat side at the time of maximum heating.
[0008]
[Means of claim 4]
As a conventional technique, there is one in which a rear vent is additionally provided downstream of an air conditioning unit and the rear vent door is driven by a dedicated actuator. For example, as shown in the control specification diagram of FIG. 6, this dedicated actuator switches and drives the rear vent door in conjunction with the switching of the blowing mode of the air conditioning unit.
Driving the rear vent door with the dedicated actuator in this way has disadvantages such as an increase in cost due to the addition of the dedicated actuator, an increase in weight, an increase in space occupied by the air conditioning unit, and an addition of a control specification for the dedicated actuator.
[0009]
However, since the rear vent door is driven by the mode switching actuator for switching the blowing mode of the air conditioning unit as in claim 4, a dedicated actuator for driving the rear vent door becomes unnecessary. For this reason, there are advantages such as cost reduction, weight reduction, space reduction, and unnecessary control specifications.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
Embodiment
1 to 5 show an embodiment, FIG. 1 is a schematic view of a vehicle air conditioner, FIGS. 2 to 4 are schematic views of main parts of an air conditioning unit, and FIG. 5 is an opening of each blow mode switching door and rear vent door. It is a figure which shows degree change.
The vehicle air conditioner includes an air conditioning unit 1 for mainly air conditioning 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 rear seat passenger.
[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 passes through a heating means 7 (for example, a heater core) that heats air passing therethrough, a bypass passage 8 that bypasses the heating means 7, and the heating means 7. The air mix door 9 is configured to adjust the ratio of the warm air and the cool air passing through the bypass passage 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 an outlet mode door (not shown). . The air conditioning unit 1 mainly includes a face mode in which cool air is blown out to the upper body of the front seat occupant, a bi-level mode in which cool air is blown out to the upper body of the occupant, and hot air is blown out to the occupant's feet. A foot mode and a differential mode that mainly blows hot air to the window glass are provided so as to be selectable manually or automatically.
[0013]
Further, on the side surface of the duct 3 of the air conditioning unit 1 (specifically, the side surface of the heater unit), the cold air cooled by the cooling means 5 bypasses the temperature adjusting means 6, and the face air outlet 11 and the rear vent A cold air bypass passage 12 is formed between the duct 2 and the air intake 13, and the air intake 13 is provided on a side surface of the duct 3 where the cold air bypass passage 12 is not provided.
The cold air bypass passage 12 is a passage provided along the side surface of the duct 3, and as shown in FIG. 4, in the vicinity of the air intake 13 so as to blow cool air above the air intake 13 of the rear vent duct 2. It is provided in a two-story structure.
[0014]
As shown in FIG. 2, the cold air bypass passage 12 is closed by the air mix door 9 at the time of max hot (that is, when the air mix door 9 fully closes the bypass passage 8 at the time of maximum heating). Is provided.
As a result, there is no problem that cold air blows out to the rear seat side during maximum heating, and the comfort of the rear seat passenger can be ensured.
[0015]
As shown in FIG. 3A, the air intake 13 of the rear vent duct 2 is provided on the side surface on the rear side of the duct 3 and opens to the downstream side of the air conditioning unit 1 on the side surface.
On the other hand, as shown in FIG. 3B, it is possible to provide the air intake port 13 on the upstream side of the side surface. However, there is a problem that the ventilation resistance of the cold air bypass passage 12 is increased, and the temperature control is performed. There is a problem that the distance from the means 6 to the air intake 13 is shortened and the air mixing property of the hot air and the cold air is lowered.
However, in the present embodiment, as described above, the air intake 13 is provided on the downstream side of the side surface of the duct 3 as shown in FIG. The amount of cold air passing through the cold air bypass passage 12 can be increased. Moreover, the distance from the temperature control means 6 to the air intake 13 becomes long, and air mix property improves.
[0016]
A rear vent door 14 is provided upstream of the air intake 13 of the rear vent duct 2 as shown in FIG. The rear vent door 14 is provided so as to restrict or close the ventilation rate of the rear vent duct 2 during the differential mode. In the present embodiment, the rear vent door 14 is provided so as to restrict the air intake 13 to a maximum of 100% during the differential mode. Yes.
[0017]
The rear vent door 14 shown in the present embodiment employs a plate-like door that rotates about a shaft 14a, and the shaft 14a of the rear vent door 14 is set downward. As described above, the shaft 14 a is set downward, so that the upper part of the rear vent door 14 is opened, and the cold air blown out from the air outlet 12 a of the cold air bypass passage 12 can easily flow into the air intake 13.
[0018]
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 15 for blowing the air conditioned air toward the rear seat side is provided at the outlet of the downstream end thereof. This rear vent grill 15 is disposed near the knees of the rear seat occupant. By manually manipulating the direction of the grill, the direction of the blown wind is changed to the upper body of the rear seat occupant, the knee, the side window, etc. It is provided to be changeable. Further, the rear vent grill 15 is provided with a grill shut (not shown), and the rear vent grill 15 can be opened and closed by a rear seat occupant.
[0019]
The rear vent door 14 shown in the present embodiment is driven by a mode switching actuator (for example, a servo motor, not shown) that switches the blowing mode of the air conditioning unit 1. Specifically, the rear vent door 14 is provided to be driven by a mode switching actuator via a link mechanism including a link lever, a rod, and the like.
Thus, by providing the rear vent door 14 to be driven by the mode switching actuator of the air conditioning unit 1, the dedicated actuator for driving the rear vent door 14 can be eliminated, reducing the cost, reducing the weight, reducing the space, Control specifications can be made unnecessary.
[0020]
FIG. 5 shows changes in the opening degree of the rear vent door 14 that operates in conjunction with the operation of the mode switching actuator. As shown in FIG. 5, the rear vent door 14 is opened during the face mode to B / L (bi-level) mode, is opened halfway during the foot mode, and the opening degree is set small during the F / D (foot / diff) mode. And is provided to be closed in the differential mode.
Thus, by opening the rear vent door 14 small in the F / D mode, a small amount of warm air can be blown from the rear vent grill 15 in the F / D mode, and the knees of the rear seat occupant can be warmed.
Further, the antifogging property can be improved by directing the rear vent grill 15 to the side window.
[0021]
[Operation of the embodiment]
Since cold air is blown out from the air outlet 12a of the cold air bypass passage 12 in the vicinity of the air inlet 13, when the air inlet 13 is opened and the rear vent grill 15 is opened, along with temperature-controlled air Cold air is supplied to the rear vent duct 2, and the conditioned air whose temperature has decreased is blown out to the rear seat side.
For this reason, in the face mode to the B / L mode, the air intake 13 is greatly opened. Therefore, when the rear vent grill 15 is opened by the grill shut, the temperature-controlled air whose temperature has been lowered is blown out to the rear seat side. .
In the foot mode, since the air intake 13 is half open, the amount of conditioned air supplied to the rear vent duct 2 is halved. When the rear vent grill 15 is opened by the grill shut, the conditioned air is blown out to the rear seat side by half.
In the F / D mode, since the opening degree of the air intake port 13 is set small, the air volume of the conditioned air supplied to the rear vent duct 2 is reduced to a small amount. When the rear vent grill 15 is opened by the grill shut, a small amount of conditioned air is blown out to the rear seat side.
In the differential mode, since the air intake 13 is closed, the conditioned air is not blown out to the rear seat side even if the rear vent grill 15 is opened by the grill shut.
[0022]
[Effect of the embodiment]
As shown in the above operation, in the blowing mode other than the differential mode, the rear vent grill 15 is opened to blow the temperature-controlled air toward the rear seat side, so that the comfort of the rear seat passenger is improved. .
On the other hand, in the F / D mode to the differential mode, the rear vent duct 2 is automatically throttled (including the case of closing) by the rear vent door 14. For this reason, even when the rear vent grill 15 is opened and closed in the differential mode where a predetermined air volume is required to ensure visibility, fluctuations in the differential air volume can be suppressed to a small extent, and consequently the influence on the differential performance is suppressed. It is done.
[0023]
[Other Embodiments]
In the above embodiment, an example in which the cold air bypass passage 12 is opened and closed by the air mix door 9 is shown, but a dedicated cold air bypass door may be provided in the cold air bypass passage 12 so as to open and close the cold air bypass passage 12. . The cold air bypass door may be linked to the air mix door 9, may be linked to each blowing mode, or may be opened and closed independently.
In the above embodiment, an example in which the rear vent door 14 is provided upstream of the air intake port 13 is shown, but it may be arranged in the rear vent duct 2. The rear vent door 14 may be another type of door such as a butterfly door.
[Brief description of the drawings]
FIG. 1 is a schematic view of a vehicle air conditioner.
FIG. 2 is a schematic view of a heater unit as viewed from above.
FIG. 3 is a schematic view of a heater unit as viewed from the front.
FIG. 4 is a schematic view of a heater unit as viewed from the side.
FIG. 5 is a diagram showing changes in opening degrees of each blowing mode switching door and rear vent door.
FIG. 6 is a control specification diagram when the rear vent door is driven by a dedicated actuator.
[Explanation of symbols]
1 Air conditioning unit 2 Rear vent duct
3 air-conditioning unit of the duct 6 temperature control means 7 a heating means 8 bypass passage 9 air mix door 10 defroster air outlet 11 face air outlet 12 air bypass passage
12a Cooling air bypass passage outlet 13 Air inlet 14 Rear vent door

Claims (4)

a) Temperature control comprising heating means for heating the passing air, a bypass passage that bypasses the heating means, and an air mix door that adjusts the ratio of hot air passing through the heating means and cold air passing through the bypass passage An air-conditioning unit that includes means and blows out the temperature-controlled air from each air outlet at the front of the vehicle;
b) a rear vent duct which is connected to the air conditioning unit downstream of the temperature control means and blows out the air temperature-controlled by the temperature control means toward the upper body of the rear seat occupant;
The cold air supplied from the upstream side of c) the temperature control unit, and the cool air bypass passage for introducing said to bypass temperature control means to the vicinity upward of the air inlet of the rear vent duct,
d) in conjunction with the blow-out mode of the air conditioning unit, squeeze the re-Yabento blown air during the defrost mode or close a Riyabentodoa,
The air outlet and the air intake port of the cold air bypass passage open to the rear side of the side surface of the duct of the air conditioning unit,
The differential outlet that mainly blows warm air to the window glass opens above the side surface of the duct of the air conditioning unit,
The air conditioner for a vehicle according to claim 1, wherein the air outlet of the bypass passage is provided in the vicinity of the air intake so as to blow cool air upward in the vicinity of the air intake . The vehicle air conditioner according to claim 1,
An air intake port of the rear vent duct is provided on a side surface of the air conditioning unit, and opens to an intermediate portion or a downstream side of the air conditioning unit on the side surface,
The vehicular air conditioner is characterized in that the cold air bypass passage having a larger passage area than the downstream side is provided on the upstream side of the air intake on the side surface of the air conditioning unit provided with the air intake. In the vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner is characterized in that the cold air bypass passage is closed by the air mix door during max hot. In the vehicle air conditioner according to any one of claims 1 to 3,
The vehicle air conditioner is characterized in that the rear vent door is driven by a mode switching actuator for switching a blowing mode of the air conditioning unit.

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