JPH1199820A - Car air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To independently adjust the temperature of air flown from a rear vent. SOLUTION: A part of cooled air passing thorough an evaporator 3 is introduced into a rear vent passage 15 formed at the bottom of a case 1 and distributed between a heat exchanger 4A side effectively utilizing the bottom part of a heater core 4 and a bypass passage 19 side under the heat exchanger 4A by a control door 20, whereby the temperature of the air blown out from a rear vent port 16 can be independently adjusted.

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.

[0002]

2. Description of the Related Art As is well known, an air conditioner for a vehicle is provided with an air mixing chamber in which a cool air passing through an evaporator and a hot air passing through a heater core are mixed in a case. The blown air is controlled to be blown out from a vent outlet, a defroster outlet, and a foot outlet provided on an upper wall of the case above the air mixing chamber based on opening / closing control of each control door.

[0003]

In order to allow the rear occupant to vent the air, a rear vent air outlet which is opened and closed by a control door is provided on the upper wall of the case separately from the vent air outlet, and the rear vent air outlet is provided. It is necessary to connect and arrange a rear vent duct that extends downward along the outer surface of the case.This increases the size of the unit, and the rear vent duct that protrudes to the outer surface of the case when the vehicle is mounted on the vehicle. It is necessary to mount the components so as not to interfere with the components, which makes the mounting layout difficult.

[0004] Further, since the temperature of the rear vent outlet is adjusted in the air mixing chamber and the same temperature-controlled air as the air blown out of the vent outlet is blown out, the rear passenger can blow out the desired temperature-controlled air. I can't let it.

Accordingly, the present invention is capable of independently adjusting the temperature of the air vented from the rear vent according to the preference of the rear passenger, and furthermore, the unit can be made compact and the layout in the vehicle compartment can be easily performed. It is intended to provide an air conditioner for a vehicle that can perform the following.

[0006]

According to the first aspect of the present invention, a bottom portion of the case communicates with an air passage between the evaporator and the heater core, extends rearward, and has a rear vent outlet at a rear end. And a lower end of the heater core protruding into the rear vent passage to form a heat exchange portion, and a rear vent passing through an evaporator near the heat exchange portion. A control door is provided for controlling the flow of the cool air flowing into the passage to the heat exchange section side and the bypass passage side below the heat exchange section.

According to a second aspect of the present invention, the control door according to the first aspect is rotatably supported by a support shaft and is disposed on the upstream side in front of the heat exchange section and on the bypass passage side. A door flap, a shut mode in which the door flaps are connected to the door flaps to shut off the flow of cool air flowing into the rear vent passage, and a full cool mode in which the entire amount of the cool air flows to the bypass passage side. A mode control mechanism for controlling the operation in an air mix mode for distributing the cold air to the heat exchange unit and the bypass passage, and a full hot mode for distributing the entire amount of the cold air to the heat exchange unit. It is characterized by.

According to a third aspect of the present invention, the mode control mechanism according to the second aspect includes a guide pin provided on each of the two door flaps and a cam groove which slidably engages the guide pin. And a cam plate that is formed and moved forward and backward to slide the guide pin along the cam groove to individually rotate the two door flaps.

According to the invention of claim 4, claims 1 to 3 are provided.
A rear foot outlet is provided near the rear vent outlet at the rear end of the rear vent passage, and a mode door is provided in the rear vent passage for switching ventilation between the rear vent outlet side and the rear foot outlet side. And

[0010]

According to the first aspect of the present invention, a part of the cool air that has passed through the evaporator is introduced into the rear vent passage, and is controlled from the rear vent outlet by the ventilation control by the control door disposed in the rear vent passage. The temperature of the blown air supplied to the rear seat occupant can be adjusted independently of the blow air of the front seat, and the rear vent blowout of the temperature-controlled air can be performed according to the preference of the rear occupant.

Further, since the rear vent passage is integrally formed at the bottom of the case, there is no need for a duct extending along the outer surface of the case, and the unit can be made compact. Can be easier.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention, the two door flaps constituting the control door and the mode control mechanism for controlling the operation of the door flaps control the ventilation to the rear vent passage and the temperature of the air blown out from the rear vent outlet. Adjustment can be performed appropriately.

According to the invention described in claim 3, according to claim 2
In addition to the effects of the invention, the structure of the mode control mechanism can be simplified, and the number of parts can be reduced as much as possible, so that the cost can be advantageously obtained.

According to the invention described in claim 4, according to claim 1 of the present invention,
In addition to the effects of the invention, it is possible to switch the rear vent blowout and the rear foot blowout with one mode door, and to blow out the temperature-regulated air in accordance with the needs of the rear passenger.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a case of an air conditioning unit. In the case 1, an evaporator 3 and a heater core 4 are provided from the upstream side of air blown from a blower unit (not shown) connected to a blower connection port 2. And are arranged in this order.

Between the evaporator 3 and the heater core 4, the cool air that has passed through the evaporator 3 is selectively blown downward to direct the heater core 4 or upward to bypass the heater core 4. An air mixing door 5 for distributing at an appropriate ratio is provided, and an upper part of the heater core 4 is connected to the evaporator 3.
The air mix chamber 6 mixes the cool air that has passed through the heater core and the warm air that has passed through the heater core 4.

The upper wall of the case 1 above the air mix chamber 6 is provided with a vent outlet 7 which is opened and closed by a vent door 8 and is opened and closed by a differential door 10 adjacent to the front side of the vent outlet 7. A defroster outlet 9 is provided.

A partition wall 1 is provided behind the air mixing chamber 6.
1 separates the foot passage 12.

The foot passage 12 extends vertically into the case 1 and communicates with the air mixing chamber 6 at an upper portion thereof.
A foot outlet 13 which is opened and closed by a foot door 14 is provided at a lower end.
Is provided.

The bottom of the case 1 is bounded by the bottom wall.
A rear vent passage 15 extending toward the rear of the case and communicating with an air passage between the evaporator 3 and the heater core 4 and having a rear foot outlet 16 at a rear end is separated.

In this embodiment, a rear foot outlet 17 is provided at the rear end of the bottom wall of the rear vent passage 15 near the rear vent outlet 16, and the rear vent outlet 16 and the rear foot outlet 17 are provided. 17, a mode door 18 is provided at a branch from the mode door 18.
The rear vent outlet 16 side and the rear foot outlet 1
The ventilation to the side 7 can be switched.

The lower end of the heater core 4 penetrates through the bottom wall of the case 1 and protrudes into a substantially upper half of the rear vent passage 15 so as to be effectively used as a heat exchange part 4A on the rear vent passage 15 side. ing.

Then, the cool air flowing through the evaporator 3 and flowing into the rear vent passage 15 is introduced into the rear vent passage 15 in the vicinity of the heat exchange unit 4A.
A control door 20 for controlling ventilation to the A side and the side of the bypass passage 19 below the heat exchange section 4A is provided.

In this embodiment, the control door 20 is rotatably supported by a support shaft 21 provided near the bottom front edge of the heat exchange section 4A, and is disposed upstream of the heat exchange section 4A. The vehicle includes a first door flap 22, a second door flap 23 disposed on the side of the bypass passage 19, and a mode control mechanism 24 for operating the first and second door flaps 22 and 23.

The mode control mechanism 24 includes a guide pin 2 provided at each end of arms 22a and 23a projecting from the lower surface near the base of the first flap 22 and the second flap 23.
5 and 26 and a cam plate 27 having a cam groove 28 in which the guide pins 25 and 26 are slidably engaged.
Is provided on one side wall.

The cam plate 27 has its front end protruding outside through the front wall of the rear vent passage 15, and is moved forward and backward by a push-pull cable or other actuator (not shown) connected to the end thereof. It is so.

The cam groove 28 of the cam plate 27 is provided with a horizontal transverse groove 28a extending in the front-rear direction, and substantially vertical vertical grooves 28b, 28c extending downward at both front and rear ends thereof. The first door flap 22 and the second door are respectively in a shut mode position shown in a), a full cool mode position shown in FIG. 2B, an air mix mode position shown in FIG. 3C, and a full hot mode position shown in FIG. The flaps 23 are individually rotated.

That is, in the shut mode position (a), the guide pin 25 is inserted into the lateral groove 28a and the guide pin 26
Is located at the substantially toe end of the rear vertical groove 28c, the first door flap 22 and the second door flap 23 are fully closed, and the flow of cold air flowing through the evaporator 3 and flowing into the rear vent passage 15 is achieved. Cut off.

In the full cool mode position (b), the guide pin 25 is positioned at a portion where the lateral groove 28a is connected to the front vertical groove 28b, and the guide pin 26 is positioned at a portion where the lateral groove 28a is connected to the rear vertical groove 28c. Then, the first door flap 22 is fully closed and the second door flap is fully opened, so that the entire amount of the cold air flows to the bypass passage 19 side.

In the air mix mode position (c), the guide pin 25 is positioned at the middle of the front vertical groove 28b, and the guide pin 26 is positioned at the horizontal groove 28a.
Is opened halfway and the second door flap 23 is fully opened, and the cool air is blown at a required ratio to the heat exchange section 4A side and the bypass passage 1
9 and distributed.

In the full hot mode position (d), the guide pin 25 is positioned at the substantially toe of the front vertical groove 28b, and the guide pin 26 is positioned at the horizontal groove 28a.
2. Both the second door flaps 23 are fully opened to allow the entire amount of the cold air to flow to the heat exchange section 4A.

In the present embodiment, the above-mentioned vent door 8 and differential door 10 are each provided with a sliding mechanism M comprising a gear mechanism.
The sliding door S slidable along the inner surface of the upper wall of the case 1 between a closed position where the vent outlet 7 and the defroster outlet 9 are closed and a storage position where the vent outlet 7 and the defroster outlet 9 are opened. -It is composed of D.

Similarly to the vent door 8 and the differential door 10, the air mix door 5 is also constituted by an arc-shaped slide door SD which is slid vertically by a slide mechanism M.

The air mix doors 5 may be provided as a pair on the left and right sides so that the driver's seat side and the passenger's seat side independently perform the temperature adjusting operation.

According to the structure of the above embodiment, a part of the cool air that has passed through the evaporator 3 is introduced into the rear vent passage 15, and the control door 20 disposed in the rear vent passage 15
Can regulate the temperature of the blown air supplied from the rear vent outlet 16 to the rear seat occupant independently of the blown air supplied from the vent outlet 7 to the front seat side. The rear vent of temperature-controlled air can be blown out according to the user's preference.

Further, since the rear vent passage 15 is integrally formed at the bottom of the case 1 and does not require a duct extending along the outer surface of the case 1, the unit can be made compact. Layout can be facilitated.

Particularly, in the present embodiment, the rear vent passage 15
Since a rear foot outlet 17 is provided in a portion adjacent to the rear vent outlet 16 of this embodiment, air can be switched between the rear vent outlet 16 and the rear foot outlet 17 by a single mode door 18. It is possible to blow out the temperature-controlled air in accordance with the needs of the seat occupants.

The control door 20 has two first door flaps 2 corresponding to a shut mode, a full cool mode, an air mix mode, and a full hot mode.
2. Since the second door flaps 23 are individually operated by the mode control mechanism 24, the control of the ventilation to the rear vent passage 15 and the temperature adjustment of the air blown out from the rear vent outlet 16 or the rear foot outlet 17 are performed. Can be done properly.

Further, the mode control mechanism 24 includes guide pins 25 and 26 provided on each door flap 22 and 23,
The guide pins 25, 26 are moved forward and backward in the front-rear direction.
And the cam plate 27 that guides the sliding contact, the structure can be simplified, the number of parts can be reduced as much as possible, and the cost can be advantageously obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an exemplary sectional view showing an operation state of the control door of the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 3 Evaporator 4 Heater core 4A Heat exchange part 15 Rear vent passage 16 Rear vent outlet 17 Rear foot outlet 18 Mode door 19 Bypass passage 20 Control door 21 Support shaft 22, 23 Door flap 24 Mode control mechanism 25, 26 Guide pin 27 Cam plate 28 cam groove

Claims (4)

[Claims] 1. A bottom portion of a case (1) communicates with an air passage between an evaporator (3) and a heater core (4) and extends rearward, and has a rear vent outlet (16) at a rear end. A rear vent passage (15) is separated, and a lower end portion of the heater core (4) is arranged so as to protrude into the rear vent passage (15) to form a heat exchange portion (4A). In the vicinity of the disposition portion, cold air flowing through the evaporator (3) and flowing into the rear vent passage (15) is passed through the bypass passage (19) on the side of the heat exchange portion (4A) and the lower side of the heat exchange portion (4A). Control door (2)
(0). An air conditioner for an automobile, characterized by comprising: 2. A control door (20) rotatably supported by a support shaft (21) and two control doors disposed on an upstream side in front of a heat exchange part (4A) and on a side of a bypass passage (19). Door flaps (22) and (23) and these door flaps (2
2) and (23), a shut mode in which the door flap blocks the flow of the cool air flowing into the rear vent passage (15), and a bypass passage (1) in which the entire amount of the cool air flows.
9), an air mix mode in which the cool air is distributed to the heat exchange section (4A) side and the bypass passage (19) side, and the entire amount of the cool air is transferred to the heat exchange section (4).
The vehicle air conditioner according to claim 1, further comprising: a mode control mechanism (24) for controlling the operation to a full hot mode for flowing to the A) side. 3. The mode control mechanism (24) includes guide pins (25) and (26) provided on two door flaps (22) and (23), respectively, and the guide pins (25) and (26).
A cam groove (28) for slidably engaging the (26) is formed, and the guide pins (25), (26) are slid along the cam groove (28) by being advanced and retracted in the front-rear direction. The air conditioner according to claim 2, further comprising a cam plate (27) for moving the two door flaps (22) and (23) individually. 4. A rear foot outlet (1) at a rear end of the rear vent passage (15) near the rear vent outlet (16).
7), and a mode door (18) for switching ventilation between the rear vent outlet (16) and the rear foot outlet (17) is provided in the rear vent passage (15). 4. The air conditioner for a vehicle according to any one of 3.