JPH11342723A - Car air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent failure of cold air flowing down along the rear seat, by having the cold air run rearward by air flow from a side-face flow-out port pushing upward and the cold air flowing to the rear seat by warm air blown out of a differential supply opening for the rear seat. SOLUTION: This air conditioner is equipped with a plurality of foot supply opening holes 2 uniformly blowing warm air from a foot floor face and a rear- seat differential supply opening 4 blowing the warm air toward the upper part from the lower part of a rear-seat side glass pane 3 besides a side-face supply opening 1. Cold air R cooled by the rear-seat side glass pane 3 flows rearward by a side-face flow F, and it is pushed upward by the warm air blown out of the rear-seat differential supply opening 4, and discharged to the outside of a car. In brief, a cold draft is solved. Therefore, knees and feet of occupants are almost uniformly warmed by the warm air blown out of multiple foot supply opening holes 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a motor vehicle, which enhances the comfort of a rear occupant in a low outside temperature condition.

[0002]

2. Description of the Related Art As a vehicle air conditioner for heating a rear passenger, a type in which warm air is blown upward from a mat at a foot is known (Japanese Utility Model Laid-Open No. 55-92513, Japanese Utility Model Laid-Open No. 56-56). Technology disclosed in -150604).

[0003]

The above-mentioned air conditioner blows warm air toward the feet of the occupant, so that a high heating effect can be obtained at the feet. However, under the condition where the outside air temperature is very low, as shown in FIG. 5, the cool air R which is cooled by the rear seat side glass J1 and flows downwards is generated by the side face flow blown out from the front seat side face outlet J2. After flowing backward by F, it flows down along the rear seat J3, and the knees of the rear passenger become cold.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioner for a vehicle which can eliminate the discomfort of a rear-seat passenger due to a cold draft.

[0005]

[Means for Solving the Problems] [Means for Claims 1 and 2]
In a condition where the outside air temperature is very low, air is cooled by the window and cools down. This cold air flows backward by the airflow blown out from the front face side outlet. On the other hand, warm air is blown upward from a rear differential air outlet provided at a lower portion of the rear seat side glass. For this reason, the cold air blown backward by the side face flow is pushed up by the warm air blown out from the rear-seat differential air outlet, thereby preventing a problem that the cool air flows down along the rear seat. Eliminates the discomfort of the rear seat occupants due to the cold draft.

[Means of Claim 3] Similar to the means of the above-mentioned claim 1, the cold air generated by the cold draft flows backward by the airflow blown out from the front face side face outlet. On the other hand, the amount of hot air blown upward from the rear seat is larger on the window side than on the inside. For this reason, the cold air blown backward by the side face flow is pushed up by the hot air blown out of the seat, and it is possible to prevent the problem that the cool air flows down along the rear seat, and as a result, the rear seat by cold draft The discomfort of the occupant can be eliminated.

[Claim 4] As in the case of the above-mentioned claim 1, the cool air generated by the cold draft flows backward by the airflow blown out from the front face side outlet. On the other hand, the blowing speed of the warm air blown upward from the rear seat is higher on the window side than on the inside. For this reason, the cold air blown backward by the side face flow is pushed up by the hot air blown out of the seat, and it is possible to prevent the problem that the cool air flows down along the rear seat, and as a result, the rear seat by cold draft The discomfort of the occupant can be eliminated.

[Claim 5] As in the case of the above-mentioned claim 1, the cold air generated by the cold draft flows backward by the airflow blown out from the front face side outlet. On the other hand, the blowing temperature of the warm air blown upward from the rear seat is higher on the window side than on the inside. For this reason, the cool air blown backward by the side face flow is canceled by the warm air blown out from the seat, and as a result, the discomfort of the rear occupant due to the cold draft can be eliminated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described based on a plurality of examples and modifications. [First Embodiment] The first embodiment will be described with reference to the operation explanatory diagram of the automotive air conditioner shown in FIG. The automotive air conditioner includes an air conditioning unit (not shown) for mainly performing air conditioning on the front seat side of the vehicle, and foot blowing means (not shown) connected to the air conditioning unit and blowing warm air to the feet of a rear occupant. When,
A rear differential blowing unit (not shown) is connected to the air conditioning unit and blows warm air upward from a lower portion of the rear side glass.

The air-conditioning unit is a well-known unit capable of blowing cold air to hot air. Side air outlets for blowing air-conditioned air toward the upper body of the occupant to the front side glass at least on both sides of the dashboard at the front of the vehicle. 1 is provided. The foot blowing means includes a plurality of foot holes 2 for uniformly blowing warm air upward from the floor of the feet of the rear occupant, and the plurality of foot holes 2 are generated by an air conditioning unit. It is provided so that hot air can be supplied.

The rear differential blowing means includes a rear side glass 3.
A rear differential air outlet 4 for blowing hot air upward from a lower portion of the vehicle, and the rear differential air outlet 4 is provided so as to be able to supply hot air generated by an air conditioning unit. . In this embodiment, an example is shown in which the rear differential air outlet 4 is provided behind half of the rear side glass 3, but the rear differential air outlet 4 is provided along the lower side of the rear side glass 3. For example, the range in which the rear differential air outlet 4 is provided may be changed.

(Operation of the First Embodiment) In the state where the outside air temperature is very low and the conditioned air is blown out from the side face air outlet 1 during heating, the air is cooled by the rear seat side glass 3 and flows downward. The cool air R flows backward by the airflow blown out from the side face outlet 1. In such a state, the rear-seat differential air outlet 4 is automatically or manually opened, and warm air blowing upward from the rear-seat differential air outlet 4 is blown out. Then, the cool air R flowing backward by the side face flow F is pushed up by the warm air blown out from the rear-seat differential air outlet 4, and the cool air R does not flow down along the rear seat 5 to the rear pillar or the like. The air is exhausted from the vehicle through an exhaust port (not shown) provided.

On the other hand, at the time of this heating, the warm air generated by the air conditioning unit is blown out from a number of foot outlets 2 provided at the feet of the rear passengers. Since the cold draft is eliminated by the warm air blown out from the above-described rear-seat differential blowout port 4, the left and right knees to feet of the occupant are almost completely blown by the warm air blown out uniformly from the large number of foot blowout holes 2. Heated evenly.

(Effects of the First Embodiment) As shown in the above operation, the cold draft is eliminated by the warm air blown out from the rear-seat differential blow-out port 4 and the blow-out through a large number of foot outlets 2. Since the left and right knees to feet of the rear occupant are uniformly heated by the warm air, the comfort of the rear occupant can be greatly improved.

[Second Embodiment] The second embodiment will be described with reference to FIG. The vehicle air conditioner of the second embodiment employs a rear seat blowing means instead of the rear differential blowing means of the first embodiment. The rear seat blowout means blows warm air upward from a large number of seat blowout holes 6 provided in the rear seat 5, and the hot air generated by the air conditioning unit is supplied to the many seat blowout holes 6. It is provided so that wind can be supplied.

In the second embodiment, the amount of warm air blown from the rear seat blowing means is on the window side (the door side in the figure).
Is provided so as to be larger than the inside (the center side in the figure). As means for increasing the amount of hot air on the window side from the inside, the opening area of the sheet-side sheet outlets 6 on the window side is made larger than that on the inside, or the number of window-side sheet outlets 6 is made larger than the inside. doing. The amount of warm air blown out from the sheet blowing holes 6 may be increased only on the window side, or may be increased as approaching the window side.

(Operation of the Second Embodiment) As shown in the operation of the first embodiment, when the outside air temperature is extremely low during heating,
In a state in which the conditioned air is blown out from the side face outlet 1, the air is cooled by the rear seat side glass 3 and flows downward, and the cool air R flows backward by the airflow blown out from the side face outlet 1. In such a state, the sheet blowing hole 6 is opened automatically or manually, and hot air is blown upward from the sheet blowing hole 6. Then, the cool air R flowing backward by the side face flow F is pushed up by the warm air blown out from the sheet blowing hole 6 on the window side, and the cool air R is provided on the rear pillar or the like without flowing down along the rear seat 5. It is discharged outside the vehicle from the exhaust port.

Although the amount of warm air blown out from the window-side seat blowout hole 6 is larger than that inside, the cold draft is lifted by the difference in the amount of hot air to eliminate the cold draft. The heating effect by the warm air is almost the same on the left and right. In addition, many foot outlets 2
The warm air blown out of the passengers evenly heats the occupant's left and right knees and feet.

(Effects of the Second Embodiment) As described above, the cold draft is eliminated by the warm air blown out from the seat blowing holes 6 and the rear seat 5
A substantially uniform heating effect can be given to the rear occupant by the warm air blown out from the occupant. Also, the warm air blown out from the large number of foot blowing holes 2 uniformly heats the left knee and the right foot of the rear passenger. For this reason, the comfort of the rear passenger can be greatly improved.

[Third Embodiment] A third embodiment will be described with reference to FIG. The second above
In the embodiment, an example has been described in which the amount of warm air blown out from the sheet blowing holes 6 on the window side is increased to eliminate the cold draft. However, in the third embodiment, by increasing the blowing speed of the warm air blown out from the sheet blowing hole 6 on the window side,
This is to eliminate the cold draft.

As a means of increasing the speed of the hot air on the window side from the inside, the supply rate of the hot air to the sheet outlets 6 on the window side is made larger than that on the inside. In addition, the wind speed of the warm air blown out from the sheet blowing hole 6 may be increased only on the window side, or may be increased as approaching the window side.
In addition, not only the wind speed on the window side is increased, but also the air volume on the window side may be increased.

[Fourth Embodiment] A fourth embodiment will be described with reference to the operation explanatory diagram of the automotive air conditioner shown in FIG. In the above-described second and third embodiments, the example in which the cold draft is eliminated by increasing the wind volume or the wind speed on the window side has been described.
In the fourth embodiment, the temperature of the hot air blown out toward the window side is set higher than the inside, thereby eliminating the cold draft.

As means for raising the temperature of the hot air on the window side higher than the inside thereof, this is realized by supplying only the hot air that has passed through the heater core in the air conditioning unit to the sheet blowing holes 6 on the window side. Note that the temperature of the hot air blown out from the sheet blowing holes 6 may be increased only on the window side, or may be increased as approaching the window side. In addition to raising the temperature on the window side,
It may be provided so that the air volume on the window side is increased or the wind speed on the window side is increased.

[Modification] In the above-described embodiment, the air conditioner having one of the rear-seat differential outlet 4 and the seat outlet 6 is shown as an example. However, the rear-seat differential outlet 4 and the seat outlet 6 are provided. An air conditioner having both of them may be adopted.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the operation of a vehicle air conditioner (first embodiment).

FIG. 2 is a diagram illustrating the operation of an air conditioner for a vehicle (second embodiment).

FIG. 3 is an operation explanatory view of an air conditioner for a vehicle (third embodiment);

FIG. 4 is a diagram illustrating the operation of a vehicle air conditioner (fourth embodiment).

FIG. 5 is an explanatory view of the operation of the automotive air conditioner (conventional example).

[Explanation of symbols]

 3 Rear side glass 4 Rear differential outlet 5 Rear seat 6 Seat vent

Claims (5)

[Claims] 1. An air conditioner for a vehicle having a rear differential air outlet for blowing hot air upward from a lower portion of a rear seat side glass. 2. The vehicle air conditioner according to claim 1, wherein said rear differential air outlet is provided behind half of said side glass. 3. An air conditioner for a vehicle capable of blowing hot air from a rear seat, wherein the amount of hot air blown out on the window side of the rear seat is larger than that on the inside. 4. An air conditioner for a vehicle capable of blowing hot air from a rear seat, wherein a hot air blowing speed at a window side of the rear seat is higher than an inside speed thereof. 5. An air conditioner for a vehicle capable of blowing hot air from a rear seat, wherein a temperature of a hot air blowout at a window side of the rear seat is higher than an inside temperature thereof.