JP3898298B2 - Air conditioner for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automotive air conditioner.
[0002]
[Prior art]
As is well known, an automobile air conditioner has an air mix chamber in which cool air that has passed through an evaporator and hot air that has passed through a heater core are mixed in a case, and the air adjusted to an appropriate temperature in the air mix chamber is supplied with the air. Blowing is controlled based on the opening / closing control of each control door from a vent outlet, a defroster outlet, and a foot outlet provided on the upper wall of the case above the mix chamber.
[0003]
[Problems to be solved by the invention]
In order to vent the rear seat occupant, a rear vent outlet that is opened and closed by a control door is provided on the upper wall of the case, and the rear vent opening extends downward along the outer surface of the case. It is necessary to connect and arrange the rear vent duct that comes out, so it is necessary to mount the unit so that the rear vent duct that protrudes from the outer surface of the case does not interfere with the vehicle interior functional parts in the instrument panel when the unit is enlarged There will be a difficult layout.
[0004]
In addition, since the temperature adjustment air is blown out from the rear vent outlet, the temperature is adjusted in the air mix chamber, and the same temperature as the air blown out from the vent outlet is blown out. Can not.
[0005]
Therefore, the present invention can independently adjust the temperature of the rear vent blown air according to the preference of the rear seat occupant, and can be configured compactly and can be easily mounted in the vehicle interior. An air conditioning apparatus for use is provided.
[0006]
[Means for Solving the Problems]
In the invention of claim 1, the evaporator and the heater core are arranged in order from the upstream side toward the rear of the vehicle in the case, and the evaporator and the heater core are arranged above the wall member with the wall member of the case as a boundary. A ventilation path is provided, and is branched from the ventilation path between the evaporator and the heater core below the wall member with the wall member of the case as a boundary, and extends toward the rear of the vehicle along the wall member. A rear vent passage having a rear vent outlet is provided at the rear end, a lower end portion of the heater core is protruded and disposed in the rear vent passage to form a heat exchange portion, and an evaporator is disposed upstream of the arrangement portion of the heat exchange portion. the cold air coming flows into Riyabento passage through a control door for ventilation control provided to the bypass passage side of the heat exchange portion and the heat exchanging part lower, control door Riyabento communication A shut mode that blocks the flow of cool air flowing into the air, a full cool mode that distributes the entire amount of the cool air to the bypass passage side, and an air mix mode that distributes the cold air to the heat exchange section side and the bypass passage side In addition, it is possible to switch to the full hot mode in which the entire amount of the cold air is circulated to the heat exchanging part side, and after passing the evaporator above the heater core in the ventilation path, the cold air and the evaporator that have bypassed the heater core are passed through After that, an air mix chamber for mixing warm air that has passed through the heater core is provided, and the air mix chamber is branched from the upper side of the air mix chamber toward the air outlet on the front seat occupant side .
[0007]
According to a second aspect of the present invention, the control door according to the first aspect is provided with two doors that are rotatably supported by a support shaft and arranged on the upstream side and the bypass passage side on the front side of the heat exchange section. A flap, a shut mode that is connected to the door flaps and shuts off the flow of the cool air flowing into the rear vent passage, a full cool mode that allows the entire amount of the cool air to flow to the bypass passage, and the cool air A mode control mechanism that controls the operation to an air mix mode that distributes the heat to the heat exchange unit side and the bypass passage side, and a full hot mode that distributes the entire amount of the cold air to the heat exchange unit side. Yes.
[0008]
In the invention of claim 3, the mode control mechanism of claim 2 is formed with guide pins respectively provided on the two door flaps, and cam grooves for slidably engaging these guide pins. It is characterized in that it is provided with a cam plate that slides the guide pin along the cam groove and rotates the two door flaps individually by moving back and forth in the front-rear direction.
[0009]
According to a fourth aspect of the present invention, a rear foot outlet is provided in the rear end portion of the rear vent passage according to any one of the first to third aspects in the vicinity of the rear vent outlet, and the rear vent outlet side and the rear foot outlet are provided in the rear vent passage. It features a mode door that switches ventilation to the exit side.
[0010]
【The invention's effect】
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 the ventilation is controlled by the control door disposed in the rear vent passage, from the rear vent outlet to the rear seat occupant side. The temperature of the supplied blown air can be adjusted independently of the blown air on the front seat side, and the rear vent blowout of the temperature-adjusted air according to the preference of the rear seat occupant can be performed.
[0011]
Also, the rear vent passage is integrally formed at the bottom of the case, eliminating the need for a duct projecting along the outer surface of the case and making the unit compact, facilitating the mounting layout in the vehicle interior. be able to.
[0012]
According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the two door flaps constituting the control door and the mode control mechanism for controlling the operation of the door flap to the rear vent passage. Ventilation control and temperature adjustment of the air blown out from the rear vent outlet can be appropriately performed.
[0013]
According to the invention described in claim 3, in addition to the effect of the invention of claim 2, the structure of the mode control mechanism can be simplified, and the number of parts can be suppressed as low as possible. Can be advantageously obtained.
[0014]
According to the fourth aspect of the present invention, in addition to the effect of the first aspect of the invention, the rear vent blowout and the rear foot blowout can be switched by one mode door, so that the temperature-controlled air meeting the needs of the rear seat occupant can be obtained. Blowout can be performed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0016]
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 connected from the upstream side of air blown from a blower unit (not shown) connected to a blower connection port 2. They are arranged in order.
[0017]
Between the evaporator 3 and the heater core 4, the cool air that has passed through the evaporator 3 is selectively passed downward to direct the heater core 4 or upward that bypasses the heater core 4. And an air mix chamber 6 in which the cool air that has passed through the evaporator 3 and the warm air that has passed through the heater core 4 are mixed in the upper portion of the heater core 4.
[0018]
A vent outlet 7 that is opened and closed by a vent door 8 is provided on the upper wall of the case 1 above the air mix chamber 6, and a defroster outlet that is opened and closed by a differential door 10 adjacent to the front side of the vent outlet 7. 9 is provided.
[0019]
Further, a foot passage 12 is separated by a partition wall 11 on the rear side of the air mix chamber 6.
[0020]
The foot passage 12 extends in the vertical direction in the case 1, communicates with the air mix chamber 6 on the upper side, and has a foot outlet 13 that is opened and closed by a foot door 14 at the lower end.
[0021]
At the bottom of the case 1, with the wall member as a boundary, a rear vent passage that communicates with the ventilation path between the evaporator 3 and the heater core 4 and extends toward the rear of the case and has a rear foot outlet 16 at the rear end. 15 is separated.
[0022]
In the present embodiment, a rear foot air outlet 17 is provided in the rear end portion of the wall member of the rear vent passage 15 in the vicinity of the rear vent air outlet 16, and the rear vent air outlet 16 and the rear foot air outlet 17 are connected to each other. One mode door 18 is provided at the branch portion, and the mode door 18 can switch the ventilation between the rear vent outlet 16 side and the rear foot outlet 17 side.
[0023]
Further, the lower end of the heater core 4 penetrates the wall member of the case 1 so as to protrude from the substantially upper half of the rear vent passage 15 and is effectively used as the heat exchanging portion 4A on the rear vent passage 15 side.
[0024]
In the vicinity of the heat exchanging portion 4A of the rear vent passage 15, the cool air flowing through the evaporator 3 and flowing into the rear vent passage 15 is placed below the heat exchanging portion 4A and the lower side of the heat exchanging portion 4A. A control door 20 for controlling ventilation to the bypass passage 19 side is provided.
[0025]
In the present embodiment, the control door 20 is rotatably supported by a support shaft 21 provided in the vicinity of the bottom front edge of the heat exchange part 4A, and is arranged on the upstream side of the heat exchange part 4A. A flap 22 and a second door flap 23 disposed on the bypass passage 19 side, and a mode control mechanism 24 for operating the first door flap 22 and the second door flap 23 are provided.
[0026]
The mode control mechanism 24 includes guide pins 25 and 26 provided at the end portions of the arm portions 22a and 23a projecting from the lower surfaces of the first flap 22 and the second flap 23 in the vicinity of the base portions. And a cam plate 27 formed with a cam groove 28 that is slidably engaged. The mode control mechanism 24 is offset from one side wall of the rear vent passage 15.
[0027]
The cam plate 27 has a front end protruding through the front wall of the rear vent passage 15 and projecting to the outside so that the cam plate 27 can be moved forward and backward by a push-pull cable or other actuator (not shown) connected to the end. It is.
[0028]
The cam groove 28 of the cam plate 27 is provided with a horizontal lateral groove 28a extending in the front-rear direction and substantially vertical vertical grooves 28b, 28c connected downward at both front and rear ends thereof, as shown in FIG. The first door flap 22 and the second door flap 23, respectively, at the shut mode position shown, the full cool mode position shown in (b), the air mix mode position shown in (c), and the full hot mode position shown in (d), respectively. Are individually rotated.
[0029]
That is, at the shut mode position (a), the guide pin 25 is positioned in the lateral groove 28a and the guide pin 26 is positioned at the substantially stop end portion of the rear vertical groove 28c, and both the first door flap 22 and the second door flap 23 are positioned. The flow of the cold air flowing through the evaporator 3 and flowing into the rear vent passage 15 is blocked by being fully closed.
[0030]
In the full cool mode position (b), the guide pin 25 is positioned at a continuous portion with the front vertical groove 28b of the horizontal groove 28a, and the guide pin 26 is positioned at a continuous portion with the rear vertical groove 28c of the horizontal groove 28a. The door flap 22 is fully closed and the second door flap is fully opened, and the entire amount of the cold air is circulated to the bypass passage 19 side.
[0031]
In the air mix mode position (c), the guide pin 25 is positioned in the middle of the front vertical groove 28b, the guide pin 26 is positioned in the horizontal groove 28a, the first door flap 22 is half open, and the second door flap 23 is fully open. Thus, the cold air is distributed and distributed between the heat exchange section 4A side and the bypass passage 19 side at a required ratio.
[0032]
In the full hot mode position (d), the guide pin 25 is positioned substantially at the end of the front vertical groove 28b and the guide pin 26 is positioned in the horizontal groove 28a, and both the first door flap 22 and the second door flap 23 are fully opened. The entire amount of the cold air is circulated to the heat exchange unit 4A side.
[0033]
In the present embodiment, the vent door 8 and the differential door 10 described above both open and close the vent outlet 7 and the defroster outlet 9 by the slide mechanism M formed of a gear mechanism to close the vent outlet 7 and the defroster outlet 9. The sliding doors S and D are slidable along the inner surface of the upper wall of the case 1 over the storage position.
[0034]
The air mix door 5 is also composed of arcuate slide doors S and D that slide up and down by the slide mechanism M in the same manner as the vent door 8 and the differential door 10.
[0035]
The air mix doors 5 may be provided in a pair on the left and right sides so that the temperature adjustment action can be performed independently on the driver seat side and the passenger seat side.
[0036]
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 rear vent vent 16 is connected to the rear vent by the ventilation control by the control door 20 disposed in the rear vent passage 15. The temperature of the blown air supplied to the seat occupant can be adjusted independently of the blown air supplied from the vent outlet 7 to the front seat, so that the rear vent of temperature-controlled air tailored to the preference of the rear occupant Can be performed.
[0037]
In addition, the rear vent passage 15 is integrally formed at the bottom of the case 1 so that a duct projecting along the outer surface of the case is not required, and the unit can be configured compactly. Can be.
[0038]
In particular, in this embodiment, a rear foot air outlet 17 is provided in the vicinity of the rear vent air outlet 16 of the rear vent passage 15, and air blowing from the rear vent air outlet 16 and the rear foot air outlet 17 is switched by one mode door 18. Therefore, the temperature-controlled air can be blown out according to the needs of the rear-seat passengers.
[0039]
The control door 20 operates the two first door flaps 22 and the second door flap 23 individually by the mode control mechanism 24 in accordance with the shut mode, full cool mode, air mix mode, and full hot mode. Therefore, the ventilation control to the rear vent passage 15 and the temperature adjustment of the air blown from the rear vent outlet 16 or the rear foot outlet 17 can be appropriately performed.
[0040]
In addition, the mode control mechanism 24 includes guide pins 25 and 26 provided on the door flaps 22 and 23, and a cam plate 27 that is advanced and retracted in the front-rear direction to guide the guide pins 25 and 26 in sliding contact. Therefore, the structure can be simplified, and the number of parts can be minimized as much as possible, which is advantageous in terms of cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the operating 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)

Case arranged evaporator (3) and a heater core (4) in order from the upstream side toward the rear of the vehicle in (1), and the wall member of the case (1) the boundary above the wall member, an evaporator (3) And a ventilation path in which the heater core (4) is arranged, and branches from the ventilation path between the evaporator (3) and the heater core (4) below the wall member with the wall member of the case (1) as a boundary. A rear vent passage (15) extending toward the rear of the vehicle along the wall member and having a rear vent outlet (16) at the rear end is provided , and a lower end portion of the heater core (4) is provided at the rear vent passage (15). The heat exchange part (4A) is formed by projecting inward, and flows into the rear vent passage (15) through the evaporator (3) upstream of the arrangement part of the heat exchange part (4A). The cool air coming from the heat exchanger 4A) side and the heat exchange section provided (4A) lower bypass passage (19) side and control door for ventilation control to the (20), the control door (20) will come to flow into Riyabento passage (15) cold A shut mode that interrupts the flow of air, a full cool mode that distributes the entire amount of the cold air to the bypass passage (19), and an air that distributes the cold air to the heat exchange section (4A) and the bypass passage (19). It is possible to switch between a mixed mode and a full hot mode in which the entire amount of the cold air is circulated to the heat exchanging section (4A). After passing the evaporator (3), the cold air and the evaporator (3 ) And an air mix chamber (6) that mixes the warm air that has passed through the heater core (3) is provided above the heater core (4). (7 Automotive air conditioning system, characterized in that branched towards 9,12).   Two door flaps (22), in which the control door (20) is rotatably supported by the support shaft (21) and arranged on the upstream side of the heat exchange section (4A) and on the bypass passage (19) side. , (23), a shut mode that is connected to the door flaps (22), (23) and blocks the flow of the cool air flowing into the rear vent passage (15), and the total amount of the cool air A full cool mode for flowing to the bypass passage (19) side, an air mix mode for distributing the cold air to the heat exchange section (4A) side and the bypass passage (19) side, and a total amount of the cold air to the heat exchange section (4A The vehicle air conditioner according to claim 1, further comprising a mode control mechanism (24) for controlling the operation to a full hot mode that circulates to the) side.   The mode control mechanism (24) allows the guide pins (25) and (26) provided on the two door flaps (22) and (23), respectively, and the guide pins (25) and (26) to slide freely. An engaging cam groove (28) is formed, and the guide pins (25), (26) are slid along the cam groove (28) by moving forward and backward in the front-rear direction, so that two door flaps are formed. The vehicle air conditioner according to claim 2, further comprising a cam plate (27) for individually rotating (22) and (23).   A rear foot air outlet (17) is provided at the rear end of the rear vent passage (15) in the vicinity of the rear vent air outlet (16), and the rear vent air outlet (16) side and the rear foot air outlet (17) The air conditioner for automobiles according to any one of claims 1 to 3, further comprising a mode door (18) for switching ventilation to and from the side.

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