JPH05139148A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To minimize a temperature reduction by providing a rear seat air conditioning passage independently from a passage of conditioned air to front seat side. CONSTITUTION:A rear seat air conditioning passage 31 is provided independently from a passage of conditioned air to front seat side to minimize a temperature reduction. The temperature of the air blown out to the feet of a rear seat side passenger from rear seat blowout holes 41a, 41b is kept high, and the flow rate of the conditioned air running in the rear seat air conditioning passage 31 is regulated by a rear seat air quantity control door 29 to sufficiently ensure the blowout air quantity of the air blown out from the rear seat blowout holes 41a, 41b. The rear seat air conditioning passage is branched to rear seat heater passage 33a, 33b and a rear seat vent passage 35 in a branching chamber 37, and the opening and closing of the rear seat heater passages 33a, 33b and the rear seat vent passage 35 is controlled by rear seat mode doors 39a, 39b provided in the branching chamber 37.

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,
In particular, the present invention relates to a vehicle air conditioner capable of blowing temperature-adjusted conditioned air to the front seat side and the rear seat side of a vehicle.

[0002]

2. Description of the Related Art In recent years, various in-vehicle air conditioners have been developed (issued by Nissan Motor Co., Ltd., June 1987, Service Weekly Report No. 578, E-93 to E-103).
page). FIG. 8 shows the inside of a vehicle equipped with a conventional vehicle air conditioner, FIG. 9 shows the configuration of a conventional vehicle air conditioner, and FIG. 10 shows a conventional vehicle air conditioner. It is the perspective view which showed the principal part.

The vehicle air conditioner 101 has an intake unit 103, a cooling unit 105, and a heater unit 107. By switching the intake door 109, the outside air which is the air outside the vehicle compartment or the inside air which is the air inside the vehicle compartment is sucked. Further, the inside air is introduced by opening the inside air introduction door 110. Outside air sucked from outside air inlet 111 or inside air inlet 1
The inside air sucked from 13 is blown onto the evaporator 117 by the blower fan motor 115. The air cooled by the evaporator 117 is supplied to the heater unit 10
Introduced to 7. An air mix door 121 is arranged on the front surface of the heater core 119.
The amount of air passing through the heater core 119 is adjusted according to the opening degree of 1. When the air mix door 121 is in the full cool state, all the air passes outside the heater core 119 without passing through the heater core 119. In the defroster mode, the differential door 123 is opened to open the defroster outlet 125 and the side defroster outlet 12.
Air is blown from 6 to the windshield or the like. In the vent mode, the vent door 127 opens. When the center vent damper 130 is open in the vent mode, air is blown out from the front seat outlet (front seat center vent) 157. Further, when the center vent damper 132 is opened in the vent mode, air is blown out from the rear seat outlet (rear seat vent) 143.
Also, in the vent mode, the side vent damper 13
When 4 is open, air is blown out from the side vent outlet 136. Also, Max Cool Damper 1
38 opens when the air mix door 121 is in a full cool state. Further, in the foot mode, the foot door 131 is opened, and air is blown out from the air outlet 133a for the front seat or the air outlet 133b for the rear seat.

[0004]

By the way, in the conventional vehicle air conditioner, the heater duct 137 for the front seat is branched from the duct 135 opened and closed by the foot door 131, and the heater duct 139 for the rear seat is branched to branch the rear seat. Piping to the side. Then, the air outlet 133a for the front seat is formed at the tip of the heater duct 137, and the heater duct 139 is formed.
An outlet 133b for the rear seat is formed at the tip of the. Therefore, a duct having a long path is required up to the rear seat outlet 133b. Further, the ratio of the amount of air blown from the front seat air outlet 133a to the amount of air blown from the rear seat air outlet 133b is set to a constant value in advance. For this reason, the temperature of the air blown from the rear-seat outlet 133b to the feet of the rear-seat occupant via the long heater duct 139 decreases.

Further, as shown in FIG. 10, since the heater duct 139 for the rear seat and the vent duct 141 are provided in the console box in which the audio device, the ashtray, etc. are arranged, the vent duct 141 is disconnected by the audio device, the ashtray, etc. The area is restricted, and as a result, it is not easy to secure a sufficient amount of blown air from the rear seat outlet 143.

The present invention has been made in view of the above-mentioned problems, and while ensuring a sufficient amount of air blown from the rear-seat outlet, the rear-seat occupant's feet can be discharged from the rear-seat outlet. An object of the present invention is to provide a vehicle air conditioner capable of maintaining a high temperature of air blown into the vehicle.

[0007]

To achieve the above object, the means provided by the present invention is a vehicle air conditioner capable of blowing out conditioned air adjusted according to a set temperature to the front seat side and the rear seat side of a vehicle. In the above, in the rear seat air-conditioning passage provided independently of the air-conditioning air passage to the front seat side, and a branch for branching from the rear-seat air-conditioning passage to the rear-seat heater passage and the rear-seat vent passage. Room, a rear seat air volume control door that adjusts the flow rate of the conditioned air that flows to the rear seat air conditioning passage, and the branch chamber, and the rear seat heater passage is closed in the rear seat vent mode to close the rear seat. And a rear seat mode door that opens the rear passenger seat vent passage and closes the rear passenger seat vent passage in the rear seat heater mode to open the rear seat heater seat.

[0008]

According to the present invention, since the rear seat air-conditioning passage is provided independently of the air-conditioning air passage to the front seat side, it is possible to reduce the temperature decrease, and the rear seat air outlet to the rear seat side is provided. The temperature of the air blown to the feet of the occupant can be kept high. Further, the flow rate of the conditioned air flowing through the rear seat air-conditioning passage can be adjusted by the rear seat air volume control door, and a sufficient amount of air blown out from the rear seat air outlet can be secured. In the branch chamber, the air conditioning passage for the rear seat is branched into a heater passage for the rear seat and a vent passage for the rear seat, and the rear seat mode passage provided in the branch chamber allows the rear heater passage and the rear seat vent passage. The opening and closing of can be controlled.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is an external perspective view showing a main part of a vehicle air conditioner according to the present invention, and FIG. 2 is an overall configuration diagram of a vehicle air conditioner according to the present invention.

First, the configuration will be described with reference to FIGS. 1 and 2. The vehicle air conditioner 1 includes a blower unit 3, a cooling unit 5, and a heater unit 7. An outside air intake port 9 and an inside air intake port 11 are opened in the blower unit 3, and the outside air intake port 9 and the inside air intake port 1 are
Switching doors 13 and 15 for switching between 1 and 1 are arranged. The blower fan motor 17 introduces the air sucked from the outside air suction port 9 or the inside air suction port 11 into the cooling unit 5. An evaporator 19 is arranged in the cooling unit 5 and cools the air blown by the blower fan motor 17. The air cooled by the evaporator 19 is supplied to the heater unit 7. The heater core 21 is arranged in the heater unit 7,
An air mix door 23 is arranged on the upstream side of the heater core 21. The air mix door 23 is rotatably provided, and the amount of air passing through the heater core 21 is adjusted by adjusting the opening degree of the air mix door 23. For example, when the air mix door 23 is rotated to the position Pa, all the air passes through the heater core 21. Further, when the air mix door 23 is rotated to the position Pb, all the air passes outside the heater core 21 without passing through the inside of the heater core 21. Therefore, when the air mix door 23 is rotated between the positions Pa and Pb, the heater core 2 is moved according to the rotation position of the air mix door 23, that is, the opening degree of the air mix door 23.
The amount of air passing through 1 is adjusted. At this time, the air passing through the heater core 21 is heated, that is, warmed. The opening degree of the air mix door 23 is controlled by a microcomputer (not shown). Therefore, when the driver sets a desired temperature, the microcomputer controls the opening degree of the air mix door 23 according to the set temperature, so that the temperature-adjusted conditioned air is blown out from the air outlet. Further, the heater unit 7 is provided with a defroster outlet 25 and a differential door 27,
When the differential door 27 is opened, the air from the outlet 25 is blown out to the windshield such as the windshield.

Further, the heater unit 7 is provided with a rear seat air volume control door 29 and a rear seat duct 31. This rear seat duct 31 serves as a rear seat air conditioning passage,
It is provided independently of the air-conditioned air passage to the front seats.
The rear seat air volume control door 29 adjusts the flow rate of the conditioned air flowing to the rear seat duct 31. A branch chamber 37 for branching from the rear seat duct 31 to the rear seat heater ducts 33a and 33b and the rear seat vent duct 35 is formed.
Rear seat mode doors 39a, 39b are provided in the interior 7. The rear-seat heater ducts 33a and 33b form a rear-seat heater passage, and the rear-seat foot outlet 41 is provided at the tip thereof.
a and 41b are opened. Rear seat air outlet 41
Reference numerals a and 41b are air outlets for blowing the conditioned air to the feet of the rear seat occupants. Further, the rear seat vent duct 35 forms a rear seat vent passage, and the rear seat vent outlet 43 is provided at the tip thereof.
a and 43b are opened. Rear vent vent 43
Reference numerals a and 43b are air outlets for blowing the conditioned air to the chest of the rear seat occupant. The rear seat mode doors 39a and 39b are doors for switching modes, and the rear seat heater ducts 33a and 33 are rear seat heater passages in the rear seat vent mode.
b is closed to open the rear seat vent duct 35 which is the rear seat vent passage, and in the rear seat heater mode, the rear seat vent duct 35 is closed to form the rear seat heater ducts 33a, 33.
Open b. Further, the heater unit 7 is formed with a front seat foot door 45 and a duct 47 which is opened and closed by the front seat foot door 45, and a front seat foot outlet 49 is opened at the tip of the duct 47. A duct 51 is formed in the heater unit 7, and a front seat vent door 53 and a fresh vent door 55 are provided at the entrance of the duct 51. Air-conditioned air is sent to the duct 51 by opening the front seat vent door 53. Also, by opening the fresh vent door 55,
The air that has passed through the evaporator 19 and is cooled is cooled by the duct 5
Sent to 1. A plurality of front vent vents 57 are opened at the tip of the duct 51. The front seat vent outlet 57 is an outlet for blowing the conditioned air to the chest of the front passenger.

Next, with reference to FIGS. 3 to 6, the respective doors provided inside the vehicle air-conditioning system 1 and their peripheral parts will be described.

FIG. 3 is a sectional view showing a case in which the heater core 21, the air mix door 23, and the rear seat mode doors 39a, 39b are sectioned in a plane. Rear seat mode door 3
When 9a and 39b rotate to the position F, the rear seat vent duct 35 is closed to close the rear seat heater ducts 33a and 33a.
Open 3b. Also, the rear seat mode doors 39a, 39b
Is rotated to the position V, the rear-seat heater duct 33
The a and 33b are closed and the rear seat vent duct 35 is opened. Then, when the rear seat mode doors 39a, 39b are rotated to the position N, the rear seat heater ducts 33a, 33b are formed.
b, both of the rear seat vent ducts 35 are opened by half.

FIG. 4 is a cross-sectional view showing a cross section taken from the direction of arrow A in FIG. When the differential door 27 is rotated to the position S, the duct leading to the air outlet 25 is fully closed, when it is turned to the position N, the duct leading to the air outlet 25 is half opened, and when it is turned to the position O, the duct leading to the air outlet 25 is fully opened. To be done. When the front seat vent door 53 is rotated to the position O, the conditioned air is sent to the duct 51, and when it is rotated to the position S, the conditioned air is not sent to the duct 51. Rear seat air volume control door 2
When 9 is rotated to position O, duct 31 is fully opened, when it is rotated to position N, duct 31 is half-opened, and when it is rotated to position S, duct 31 is fully closed.

FIG. 5 is a cross-sectional view showing a case where a cross section is taken from the arrow B of FIG. When the front seat foot door 45 is rotated to the position O, the duct 47 is fully opened, when it is rotated to the position N, the duct 47 is half-opened, and when it is rotated to the position S, the duct 47 is fully closed.

FIG. 6 is a cross-sectional view showing a case where a cross section is taken from the view C in FIG. When the fresh vent door 55 rotates to the position O, the cooling air that has passed through the evaporator 19 and is cooled is sent to the duct 51, and when the fresh vent door 55 rotates to the position S, the sending of the cooling air to the duct 51 is blocked.

Next, the operation will be described with reference to FIG.

First, the operation in the vent mode will be described. In the vent mode, the front seat foot door 45, the rear seat air volume control door 29, the differential door 27, and the fresh vent door 55 rotate to the position S, and only the front seat vent door 53 rotates to the position O. As a result, the conditioned air is blown out from the front seat vent outlet 57 to the chest of the front seat occupant. At this time, when a fresh vent switch (not shown) is turned on, the fresh vent door 55 rotates to the position O, and the cooling air is blown out from the front seat vent outlet 57 together with the conditioned air.

Next, the operation in the rear seat vent mode will be described. From the vent mode state, the rear seat air volume control door 29
Rotates to position O. In this state, the rear seat mode door 3
Since 9a and 39b are rotated to the position V, the heater passage for the rear seat is closed and the vent passage for the rear seat is opened, so that the conditioned air is blown from the rear seat vent outlets 43a, 43b. It is blown out to the passenger's chest. Therefore, in the rear seat vent mode, the conditioned air is blown out from the front seat vent outlet 57 and the rear seat vent outlets 43a and 43b. At this time,
When a fresh vent switch (not shown) is turned on, the fresh vent door 55 rotates to the position O, and the cooling air is blown out from the front seat vent outlet 57 together with the conditioned air.

Next, the operation in the bilevel mode will be described. In the bi-level mode, the front seat vent door 53, the front seat foot door 45, and the rear seat air volume control door 29 are rotated to the position O, and the differential door 27 and the fresh vent door 55 are located at the position S.
And the rear seat mode doors 39a, 39b are rotated to the position N, and the conditioned air blows the front seat vent outlet 57, the front seat foot outlet 49, and the rear seat foot outlets 41a, 41b. And it is blown out from the vent vents 43a and 43b for the rear seats.

Next, the operation in the foot mode will be described.
In the foot mode, front seat vent door 53, differential door 27,
The fresh vent door 55 is rotated to the position S, the front seat foot door 45 and the rear seat air volume control door 29 are rotated to the position O, and the rear seat mode doors 39a and 39b are rotated to the position F. Since the vent passage for the seat is closed and the heater passage for the rear seat is opened, the conditioned air is blown by the front air outlet 4 for the front seat.
9. The air is blown out from the rear seat foot outlets 41a and 41b.

Next, the operation in the rear seat priority foot mode will be described. Only the front seat foot door 45 rotates from the position O to the position N from the state of the foot mode. As a result, the conditioned air blown out from the front seat foot outlet 49 is reduced, and the conditioned air blown out from the rear seat foot outlets 41a and 41b is increased accordingly. Therefore, the rear seat side is preferentially heated.

Next, the operation in the front seat priority foot mode will be described. From the state of the foot mode, only the rear seat air volume control door 29 is rotated from the position O to the position N. As a result, the conditioned air blown from the rear seat foot outlets 41a and 41b is reduced, and the conditioned air blown from the front seat foot outlet 49 is increased accordingly. Therefore, the front seat side is preferentially heated.

Next, the operation in the differential foot mode will be described. In the differential foot mode, the front seat vent door 53 and the fresh vent door 55 rotate to the position S, the front seat foot door 45 and the rear seat air volume control door 29 rotate to the position O, and the rear seat mode doors 39a and 39b are located. Since the differential door 27 is rotated to the position N by rotating to F, the conditioned air is blown out from the front seat foot outlet 49 and the rear seat foot outlets 41a and 41b, and the air conditioner is supplied from the air outlet 25. The wind is blown to the windshield such as the windshield.

Next, the operation in the defroster mode will be described. Front vent door 5 when in defroster mode
3, the front seat foot door 45, the rear seat air volume control door 29, the fresh vent door 55 rotate to the position S, and the differential door 2
7 is rotated to the position O, and the conditioned air is blown from the outlet 25 to the windshield such as the windshield to remove the fog on the windshield.

As described above, the rear-seat duct 31 serving as the rear-seat air-conditioning passage is provided independently of the air-conditioning air passage toward the front seat, and the rear-seat duct 31 serves as the rear-seat heater passage. The heater ducts for the seats 33a and 33b and the rear seat vent duct 35 serving as the rear seat vent passage are branched, so that the rear seat duct 31 can be easily installed in the console box in which the audio device, the ashtray, etc. are arranged. Can be incorporated into.

Further, by controlling the turning positions of the front seat foot door 45 and the rear seat air volume control door 29, the air conditioner blown out from the front seat foot outlet 49 and the rear seat foot outlets 41a and 41b. You can change the wind ratio.

Further, since the front seat heater passage and the rear seat heater passage are separated from each other, it is possible to send conditioned air having a small temperature decrease to the rear seat heater passage.

[0029]

As described above, according to the present invention, since the rear seat air-conditioning passage is provided independently of the air-conditioning air passage to the front seat side, the temperature drop can be reduced. The temperature of the air blown from the rear seat air outlet to the feet of the rear seat occupant can be kept high. Further, the flow rate of the conditioned air flowing through the rear seat air-conditioning passage can be adjusted by the rear seat air volume control door, and a sufficient amount of air blown out from the rear seat air outlet can be secured.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of an embodiment according to the present invention.

FIG. 2 is an overall configuration diagram of an embodiment according to the present invention.

FIG. 3 is a cross-sectional view showing a cross section taken along a plane passing through a heater core, an air mix door and a rear seat mode door in the embodiment shown in FIG.

FIG. 4 is a cross-sectional view showing a case where a cross section is taken from view A in FIG.

5 is a cross-sectional view showing a case where a cross-section is taken from the arrow B of FIG.

6 is a cross-sectional view showing a case where a cross-section is taken from the arrow C in FIG.

FIG. 7 is a table showing rotation positions of each door in each mode.

FIG. 8 is an explanatory view showing the inside of a vehicle equipped with a conventional vehicle air conditioner.

FIG. 9 is a configuration diagram of a conventional vehicle air conditioner.

FIG. 10 is a perspective view showing a main part of a conventional vehicle air conditioner.

[Explanation of symbols]

 1 Vehicle Air Conditioner 3 Blower Unit 5 Cooling Unit 7 Heater Unit 9 Outside Air Suction Port 11 Inside Air Suction Port 13 Switching Door 15 Switching Door 17 Blower Fan Motor 19 Evaporator 21 Heater Core 23 Air Mix Door 25 Defroster Blowout 27 Def Door 29 Rear seat air volume control door 31 Rear seat ducts 33a, 33b Rear seat heater passage 35 Rear seat vent passage 37 Branch chambers 39a, 39b Rear seat mode doors 41a, 41b Rear seat foot outlets 43a, 43b Rear seat vents Air outlet 45 Foot door for front seat 47 Duct 49 Foot outlet for rear seat 51 Duct 53 Vent door for front seat 55 Fresh vent door 57 Vent outlet for front seat

Claims (1)

[Claims] 1. In a vehicle air conditioner capable of blowing out conditioned air adjusted according to a set temperature to a front seat side and a rear seat side of a vehicle, the conditioned air passage to the front seat side is provided independently of the passage. A rear seat air-conditioning passage, a branch chamber for branching from the rear seat air-conditioning passage to a rear seat heater passage and a rear seat vent passage, and adjusting a flow rate of air-conditioning air flowing to the rear seat air-conditioning passage. A rear seat airflow control door and a branch chamber, which is provided in the branch chamber, closes the rear seat heater passage and opens the rear seat vent passage in the rear seat vent mode, and opens the rear seat vent passage in the rear seat heater mode. And a rear seat mode door that closes the rear seat heater passage to open the rear seat heater passage, the vehicle air conditioner.