JPH0692135A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To easily arrange a rear vent duct for guiding conditioned air to a rear seat, regardless of a car kind. CONSTITUTION:Cold air is sucked from a fan case 22 into a heater case 21 in accordance with driving of a fan 23. A proportion of the cold air given to a heater core 25 is set by an air mix damper 26. Hot air heated by the heater core 25 is mixed with the cold air from the fan case 22, to produce conditioned air. A rear vent duct 38 is connected to a rear duct port 37 provided in a lower part of the heater case 21. The rear duct port 37 is opened by a rear duct damper 40 at the time of setting a rear face blow mode. In the rear vent duct 38, conditioned air is blown from a rear face blow port 39 into a cabin in a condition that the rear vent port 37 is opened.

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 vehicle which blows conditioned air to the rear seat side through a rear vent duct.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner for a vehicle, in order to improve the air conditioning environment on the rear seat side of a vehicle compartment, there is provided an air conditioner that blows conditioned air to the rear seat side through a vent duct. .

FIG. 4 shows an example of this type of air conditioner. That is, the fan case 2 is provided inside the heater case 1.
Is provided, and cool air is drawn into the heater case 1 from the fan case 2 in response to the driving of the fan 3. A heater core 5 that is opened and closed by an air mix damper 4 is disposed in the lower part of the fan case 2 in the heater case 1, and the proportion of cool air passing through the heater core 5 is set according to the opening degree of the air mix damper 4. To be done. The warm air passage located on the downstream side of the heater core 5 joins the cool air passage formed on the outer periphery of the fan case 2 to form an air conditioning air passage.

A foot damper 6 is provided below the heater case 1.
A foot outlet 7 that opens and closes is formed, and a face opening 9 and a differential opening 10 that open and close by a switching damper 8 are formed in the upper part of the heater case 1.

Here, the vent duct 1 is attached to the face opening 9.
1 is connected. The vent duct 11 extends to the front face outlet 12, and a vent duct side port 13 reaching a side outlet (not shown) is formed in an intermediate portion of the vent duct 11. A rear vent port 14 is formed in the middle of the vent duct 11, and a rear vent duct 16 extending to a rear face outlet 15 corresponding to a rear seat is connected to the rear vent port 14. Here, the control device (not shown) adjusts the opening degree of the air mix damper 4 according to the set temperature, and sets the opening degree of each of the dampers 6 and 8 according to the setting of the blowing mode. Therefore, when it is set to blow the conditioned air from the front face outlet 12, the vent duct 11
Since the air is blown through the rear vent duct 16, the conditioned air is blown not only from the front face outlet 12 but also from the rear face outlet 15 and the side outlets, so that the air conditioning environment on the rear seat side can be improved. .

[0006]

However, in the case of the above-mentioned conventional structure, since the rear vent duct 16 is branched from the vent duct 11 connected to the upper part of the heater case 1, the branch position of the vent duct 16 is changed. Must be set high. Therefore, depending on the vehicle model, it is difficult to arrange the rear vent duct 16 in terms of space. Further, since the rear vent duct 16 has to be extended to the rear face outlet 15, the pressure loss increases as the path of the rear vent duct 16 becomes longer, which causes a decrease in air flow. It was

The present invention has been made in view of the above circumstances, and an object thereof is to easily arrange a rear vent duct for blowing conditioned air to the rear seat side regardless of the vehicle type, and An object of the present invention is to provide a vehicle air conditioner capable of increasing the amount of air blown through the rear vent duct.

[0008]

In a vehicle air conditioner of the present invention, an air-conditioning air generated by heating cold air sucked into a heater case by a heating means is provided in a vent duct provided above the heater case. In a vehicle air conditioner that blows air into a vehicle through a rear vent port provided at a lower portion of the heater case, the rear vent duct being connected to the rear vent port and extending to a rear vent port provided corresponding to a rear seat. And a rear vent damper that opens and closes the rear vent port, and a control device that drives the rear vent damper so that the rear vent port is opened when the rear ventilation mode is set.

Further, the control device may be configured such that the rear vent damper closes the warm air passage located on the downstream side of the heating means when the rear air blowing mode is set.

[0010]

According to the vehicle air conditioner of the first aspect,
The conditioned air is generated by the cold air sucked into the heater case being heated by the heating means. The conditioned air thus generated is blown into the vehicle compartment through the vent duct.

When the rear ventilation mode is set, the control device opens the rear vent opening by the rear vent damper. Thereby, the conditioned air is blown from the rear outlet through the rear vent duct connected to the rear vent, so that the air conditioning environment on the rear seat side can be improved.

Further, according to the vehicle air conditioner of the second aspect, when the rear air blowing mode is set, the control device:
The rear vent damper closes the warm air passage located downstream of the heating means. As a result, the cold air sucked into the heater case is not caught in the heating means, so that the efficiency during the cooling operation can be improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic vertical sectional view of an air conditioner. In FIG. 1, a spiral fan case 22 is formed in the heater case 21, and cool air is sucked into the fan case 22 in response to the drive of a fan 23 provided in the fan case 22. In this case, an evaporator (not shown) is arranged on the suction side of the fan case 22, and in the driving state of the fan 23, the cool air passing through the evaporator is blown from the fan case 22 into the heater case 21. In the heater case 21, a cool air passage 24 is formed on the outer circumference of the fan case 22.

A heater core 25, which is a heating means, is arranged in the lower part of the heater case 21. This heater core 2
5 is opened and closed by the air mix damper 26, and the ratio of the cool air passing through the heater core 25 to the cool air from the fan case 22 is set according to the opening degree of the air mix damper 26.

A warm air passage 27 is provided downstream of the heater core 25.
Is formed, and the warm air passage 27 merges with the cool air passage 24 from the fan case 22 to form the conditioned air passage 28.

At the bottom of the heater case 21, the air conditioning air passage 2 is provided.
The foot opening 29 is formed to face 8 and
A face opening 30 and a differential opening 31 are formed on the upper portion of the heater case 21. Here, a V-shaped foot damper 32 (movable between a solid line position and a chain double-dashed line position) is provided corresponding to the foot opening 29, and the foot opening 29 and the air-conditioning air flow according to the opening degree of the foot damper 32. Passage 28
Is designed to be opened and closed. A switching damper 33 is provided corresponding to the face opening 30 and the differential opening 31,
The face opening 30 and the differential opening 31 are opened and closed according to the opening degree of the switching damper 33.

A vent duct 34 is connected to the face opening 30. This vent duct 34 extends to the front face outlet 35 provided on the front seat side,
The conditioned air that has passed through the face opening 30 is guided to the front face outlet 35. A vent side port 36 is provided in the middle of the vent duct 34, and the vent duct 3
A part of the conditioned air passing through 4 is guided to a side air outlet (not shown) provided on the side surface inside the vehicle compartment.

On the other hand, a rear vent port 37 is formed near the bottom surface of the heater case 21, and a rear vent duct 38 is connected to the rear vent port 37. The rear vent duct 38 extends to a rear face outlet 39 provided at the foot portion of the rear seat, and guides the conditioned air that has passed through the rear vent port 37 to the rear face outlet 39. Rear vent damper 40 corresponding to the rear vent port 37
Is provided, and the rear vent port 37 opens and closes according to the opening degree of the rear vent damper 40. In this case, the rear vent damper 40 completely shuts off the warm air passage 27 with the rear vent port 37 completely opened.

The air mix damper 26, the foot damper 32, the switching damper 33 and the rear vent damper 40.
The opening degree is adjusted by a control device (not shown).

FIG. 2 shows a control panel for setting the blowing mode of the air conditioner. In FIG. 2, a push button group 42 is provided on the control panel 41, and the blowing mode can be set by pressing the push button group 42. Here, in addition to the push button group 42, the control panel 41 is provided with a rear face air blowing mode push button 43. Further, the control panel 41 is provided with temperature setting push buttons 44 and 45. Then, the control device (not shown) controls the foot damper 32 and the switching damper 3 according to the set blowing mode.
3 is adjusted, and the rear vent damper 40 is pressed when the rear face air blowing mode push button 43 is pressed.
Half open. In addition, the control device includes a temperature setting push button 4
Air mix damper 26 depending on the operation on 4, 45
Adjust the opening of.

Next, the operation of the above configuration will be described. In order to blow the conditioned air not only to the front seat side but also to the rear seat side, the rear face blowing mode push button 43 provided on the control panel 41 is pressed and the temperature setting push button 4 is pressed.
The desired temperature is set with 4,45. Then, the control device adjusts the air mix damper 26 to an opening degree according to the set temperature and drives the fan 23. As a result, the cool air from the evaporator is sucked into the heater case 21 from the fan case 22 in response to the driving of the fan 23, so that a part of the cool air from the fan case 22 is divided by the air mix damper 26 and separated from the heater core 25. While passing through the warm air passage 27, the remaining cool air passes through the cool air passage 24. The warm air warmed by the heater core 25 passes through the warm air passage 27 and mixes with the cool air passing through the cool air passage 24, so that conditioned air is generated and the conditioned air passage 28 is generated.
Pass through.

When the rear-face air-blowing mode push button 43 is operated to set the rear-face air-blowing mode, which is the rear air-blowing mode, the control device moves the foot damper 32 to the position indicated by the chain double-dashed line in the figure. Since the opening 29 is closed and the switching damper 33 is moved to the position shown by the solid line in the drawing to open the face opening 30, the conditioned air is discharged from the face opening 3
The air is blown from 0 to the vent duct 34. As a result, the conditioned air is blown from the front face outlet 35 to the front seat side, and the conditioned air is blown from the side outlet.

On the other hand, when the rear face blowing mode is set, the control device opens the rear vent port 37 by the rear vent damper 40 so that the conditioned air is blown from the rear vent port 37 to the rear vent duct 38. As a result, the conditioned air is blown into the vehicle interior from the rear face outlet 39 through the rear vent duct 38, so that the air conditioning environment on the rear seat side can be improved.

According to the above structure, the heater case 2
A rear vent port 37 is formed in the lower part of 1, and a rear vent duct 38 for guiding the conditioned air to the rear face outlet 39 is connected to the rear vent port 37, and a rear vent damper 40 is used to set the rear vent when the rear face blowing mode is set. Since the mouth 37 is opened, the conditioned air can be blown to the rear seat side through the rear vent duct 38 when the rear face blowing mode is set. Therefore, unlike the conventional example in which the rear vent duct is branched from the vent duct connected to the upper part of the heater case, the heater case 21
Since the rear vent duct 38 can be connected to the lower part of the vehicle, the rear vent duct 38 can be arranged along the bottom surface of the vehicle, so that the rear vent duct 38 can be easily arranged regardless of the vehicle type. be able to.

Further, since the rear vent duct 38 can be arranged linearly and at a short distance, it is possible to suppress the pressure loss of the rear vent duct 38 and increase the air flow rate.

FIG. 3 shows a control panel according to a second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. In FIG. 3, an arrow display 46 for printing the rear-face blower push button 43 in correspondence with the maximum cooling operation is printed on the control panel 41. Here, when the rear face air blowing mode is set, the control device moves the rear vent damper 40 to the two-dot chain line in the figure to completely open the rear vent port 37 and the warm air passage 27.
Is configured to shut off completely.

In the case of the second embodiment, the user operates the temperature setting push button 44 by confirming the arrow 46 when setting the rear face blowing mode with the push button 43 provided on the control panel 41. Since the maximum cooling operation is manually set, the air mix damper 26 shuts off the air passage to the heater core 25. As a result, all of the cool air from the fan case 22 passes through the cool air passage 24. At this time, since the warm air passage 27 from the heater core 25 is closed by the rear vent damper 40, the cold air passage 2 is closed.
It is possible to prevent the cool air passing through 4 from flowing back from the warm air passage 27 to the heater core 25. Therefore,
Even if the heater core 25 is a constant water flow type valveless heater, the heater core 25 can be completely sealed by the air mix damper 26 and the rear vent damper 40, so that warm air is entrained in the cool air blown from the fan case 22. Therefore, the cooling capacity at the time of maximum cooling operation can be maximized.

[0028]

As is apparent from the above description, according to the vehicle air conditioner of the first aspect, the rear vent duct for blowing the conditioned air from the rear outlet corresponding to the rear seat is provided with the heater case. In addition to connecting to the lower part of the car, when the rear ventilation mode is set, air is blown from the rear outlet to the passenger compartment through the rear vent duct, so a rear vent duct for blowing to the rear seat side can be easily arranged regardless of the vehicle model. It has an excellent effect that it can be installed and the amount of air blown through the rear vent duct can be increased.

According to the vehicle air conditioner of the second aspect, when the rear air blowing mode is set, the warm air passage from the heating means is closed by the rear vent damper, so that the cooling operation is set. Occasionally, the cooling air is not entrained in the heating means, and in addition to the effect of the vehicle air conditioner according to the first aspect, there is an excellent effect that the cooling efficiency during the cooling operation can be increased.

[Brief description of drawings]

FIG. 1 is an overall schematic vertical sectional view showing a first embodiment of the present invention.

[Figure 2] Front view of the control panel

FIG. 3 is a front view of a control panel showing a second embodiment of the present invention.

FIG. 4 is an overall schematic vertical sectional view showing a conventional example.

[Explanation of symbols]

21 is a heater case, 22 is a fan case, 23 is a fan, 25 is a heater (heating means), 26 is an air mix damper, 24 is a cold air passage, 27 is a warm air passage, 28 is an air conditioning air passage, 34 is a vent duct, 37 Is the rear vent, 38
Is a rear vent duct, 39 is a rear face outlet (rear outlet), and 40 is a rear vent damper.

Claims (2)

[Claims] 1. A vehicle air conditioner for blowing conditioned air generated by heating cold air sucked into a heater case by a heating means into a vehicle compartment through a vent duct provided at an upper portion of the heater case. A rear vent port provided in the lower part of the heater case, a rear vent duct connected to the rear vent port and extending to a rear outlet provided corresponding to the rear seat, and a rear vent damper for opening and closing the rear vent port. An air conditioner for a vehicle, comprising: a control device that drives the rear vent damper so that the rear vent port is opened when the rear ventilation mode is set. 2. The vehicle according to claim 1, wherein the control device is configured to close the warm air passage located on the downstream side of the heating means by the rear vent damper when the rear air blowing mode is set. Air conditioner.