JP2010023640A - Air-conditioning apparatus for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning apparatus for a vehicle easily adaptable both for the specifications of a vehicle type introducing only cold air to a rear vent duct and a specification of a vehicle-type that introduces mixed conditioned air. <P>SOLUTION: First and second case sections 80, 80' forming an air stream path on the downstream side of a heater core 24 are structured divided from a case body 21, and is configured to be selectively attachable relative to the case body 21. An opening 80d is formed in the first case section 80; in a condition where a warm air duct 90 supplied warm air via an air mix door 51 which adjusts the mixed conditioned air detachably connected to the rear vent duct 70; the opening 80d is configured to be connected to the rear vent duct 70 via the warm air duct 90; whereas the second case section 80' is formed into a shape with its opening blocked, and the connection with the rear vent duct 70 is shut off, in a detached condition of the warm air duct 90. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is installed in an instrument panel of a vehicle and introduces air to generate air-conditioned air, and extends from the air-conditioning unit toward the rear seat side behind the driver's seat in the passenger compartment. The present invention relates to a vehicle air conditioner including a rear vent duct.

  Conventionally, an air conditioning unit of a vehicle air conditioner is installed in an instrument panel of a vehicle such as an automobile. In the case of the air conditioning unit, an inlet for introducing air for air conditioning and a outlet for conditioned air are formed, and an air flow path extending from the inlet to the outlet is formed in the case.

  In this air flow path, a cooling heat exchanger and a heating heat exchanger are arranged in this order in the air flow direction. The air introduced into the air flow path from the case inlet passes through the cooling heat exchanger and the heating heat exchanger, and the temperature is adjusted, and then formed on the instrument panel through the case outlet. The air outlet is supplied to the driver's seat and passenger's seat in the front of the passenger compartment.

Further, in a vehicle air conditioner, for example, as disclosed in Patent Document 1 below, a rear vent duct that extends from the air conditioning unit toward the rear seat side behind the driver seat in the passenger compartment. The air conditioning air is supplied to the rear seat outlet opening formed on the rear seat side to improve the comfort of the rear seat.
JP 2003-104039 A

  By the way, in the said patent document 1, the air-conditioning unit is provided with the several air flow path and the door member which switches the direction of an air flow, The cold wind cooled with the heat exchanger for cooling by switching this door member Only the above-mentioned rear vent duct, or mixed with cold air and hot air cooled and heated by a cooling heat exchanger and a heating heat exchanger to generate mixed conditioned air, which is then led to the rear vent duct It is possible to do.

  However, in regions where the temperature is relatively high throughout the year, it is sufficient that only the cold air is guided to the rear seat side, and there is a case where the supply of mixed air-conditioning air is not necessary. Therefore, in the configuration disclosed in Patent Document 1, the door member switching function may be wasted.

  For these reasons, in the vehicle air conditioner, it is preferable to be able to individually provide a vehicle according to the vehicle specification that guides only the cold air to the rear vent duct and a vehicle that conforms to the vehicle specification that guides the mixed air conditioned air. it is conceivable that.

  However, doing so requires a plurality of production lines, resulting in an increase in manufacturing cost.

  An object of the present invention is to provide a vehicle air conditioner that can easily correspond to a vehicle type specification that guides only cold air to a rear vent duct and a vehicle type specification that guides mixed air-conditioning air.

  The vehicle air conditioner according to the present invention is installed in an instrument panel of a vehicle, introduces air into the air conditioning unit to generate conditioned air, and the air conditioning unit from the air conditioning unit to the rear seat side behind the driver's seat in the passenger compartment. A vehicle air conditioner including a rear vent duct extending toward the air conditioning unit, wherein the air conditioning unit includes an introduction port for introducing air and a lead-out port for deriving the conditioned air to an air outlet provided in the instrument panel. A case main body, an air passage formed in the case main body and extending from the inlet to the outlet, and cooling heat for cooling the air introduced from the inlet through the air passage. The rear vent duct, comprising: an exchanger; and a heating heat exchanger disposed on the air flow path downstream of the cooling heat exchanger and heating the air introduced from the introduction port. Is The first and second case portions that form an air flow path downstream of the heating heat exchanger are configured to be separated from the case main body, and are configured to guide the cold air after passing through at least the cooling heat exchanger. The first case portion is formed with an opening, and a hot air duct that supplies hot air through an air mix door that adjusts the mixed air-conditioning air. Is configured to be connected to the rear vent duct via the hot air duct while the second case portion is configured to be connected to the rear vent duct. The portion is closed, and when the hot air duct is detached, the connection with the rear vent duct is cut off.

  According to this configuration, the first and second case portions are configured separately from the case main body and can be selectively attached to the case main body. It is possible to easily correspond to a vehicle type specification that guides only cold air and a vehicle type specification that guides mixed air-conditioning air.

  In one embodiment of the present invention, the air mix door mounted on the rear vent duct is provided with a fixing mechanism that fixes the air mix door in a closed position for closing the warm air side opening.

  According to this configuration, by fixing the air mix door in the closed position by the fixing mechanism, in the vehicle type specification that guides only the cool air to the rear vent duct, the cool air can be supplied to the rear seat side without leakage. In this case, the air mix door has a mixed air-conditioning air adjustment function in the vehicle type specification that guides mixed air-conditioning air, while it has a cold air leakage prevention function in the vehicle type specification that guides only the cold air to the rear vent duct. The rear vent duct can be shared in both models.

  In an embodiment of the present invention, an instrument panel member is disposed so as to penetrate between the case body and the first and second case portions.

  According to this configuration, when assembling the vehicle air conditioner and the instrument panel member, the instrument panel member and the case part can be assembled in order of the air conditioning unit (case body). Can increase the sex.

  According to the present invention, the first and second case portions are divided from the case main body and can be selectively attached to the case main body. It is possible to easily correspond to a vehicle type specification that guides only cold air and a vehicle type specification that guides mixed air-conditioning air.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 (a) is a perspective view showing a case where a hot air duct 90 is attached in the vehicle air conditioner A according to the present invention, and FIG. 1 (b) is a case portion constituting the vehicle air conditioner A. FIG. 2 is a side sectional view of the vehicle air conditioner A shown in FIG. 1 cut at a position including the opening 80d, the hot air duct 90, and the like.

  The instrument panel 1 is mainly formed of a resin material, and as shown by a two-dot chain line in FIG. 2, a dashboard panel 2 that partitions an engine room R1 and an engine compartment R2 in which an engine (not shown) is accommodated. It is provided on the vehicle rear side (that is, the passenger compartment R2 side).

  This automobile is a so-called left-hand drive vehicle, and a driver's seat (not shown) is provided on the left side of the front part of the passenger compartment, and a passenger seat (not shown) is provided on the right side. Although not shown, a second row seat as a rear seat is disposed behind the driver's seat and the passenger seat in the passenger compartment, and further, the third row is located behind the second row seat. Seats are provided. In other words, this automobile has three rows of seats arranged in the vehicle longitudinal direction.

  Unless otherwise specified in the following description, “front” and “rear” are “front and rear direction of vehicle” and “rear and forward direction of vehicle”, and “left” and “right” are respectively “based on the vehicle body”. It means “left in the vehicle width direction” and “right in the vehicle width direction”. In the figure, the arrow (Fr) indicates the front of the vehicle, and the arrow (R) indicates the rear of the vehicle.

  As shown in FIG. 1, a steering wheel 3 is arranged in front of the driver's seat. A cluster 4 that accommodates a speed meter and the like is disposed in a portion on the left side of the instrument panel 1 that is positioned in front of the steering wheel 3, and a vehicle air conditioner A (hereinafter, referred to as a vehicle air conditioner A) Operation dials 5, 5,... Connected to a controller (not shown) of the air conditioner A) are arranged.

  Further, a shift operation portion 7 extending from the shift lever 6 is provided at a front portion of the center console 1a formed so as to bulge from the vicinity below the operation dials 5, 5,. It is provided at a predetermined height from the vehicle body floor F (indicated by a two-dot chain line in FIG. 2). Here, the predetermined height refers to a height set so that an occupant can easily operate the shift lever 6. The floor console 15 is connected to the rear side of the center console 1a.

  Although not shown, audio and a navigation device are installed above the operation dials 5, 5,. Close to the left and right sides of the installation space for audio and the like, a pair of left and right vertical ventilators 8 and 8 are provided in the substantially central portion of the instrument panel 1, from which air conditioning is performed toward the upper body of the passenger. The wind is blowing out.

  The left and right end portions of the instrument panel 1 are also provided with vertically long ventilators 8 and 8 similar to those in the substantially central portion, and air conditioned blows out toward the upper body of the driver seat and passenger seat passengers, respectively. It is like that. Further, a defrost 9, 9,... For front window G (shown by a two-dot chain line in FIG. 2) is provided at the front end of the upper surface of the instrument panel 1.

  The instrument panel 1 of the present embodiment includes a strength member 18 (hereinafter referred to as an instrument panel member) made of a steel pipe that extends in the left-right direction and is supported on the left and right ends of the vehicle body. The instrument panel member 18 is located near the lower part inside the instrument panel 1.

  The air conditioner A includes an intake box 19 that sucks air, an air conditioning unit 20, and a rear vent duct (rear air conditioning duct) 70 that extends from the air conditioning unit 20 toward the rear seat side behind the driver's seat. And a case portion 80 and a hot air duct 90 connected to the case portion 80.

  The air conditioning unit 20 is accommodated in a substantially central portion in the left-right direction inside the instrument panel 1. As shown in FIG. 2, a vent duct 10 and a defrost duct 11 are disposed on the air conditioning unit 20 in the instrument panel 1. The downstream end of the vent duct 10 is connected to the ventilators 8, 8,..., And the downstream end of the defrost duct 11 is connected to the defrosts 9, 9,.

  Furthermore, the end of the rear vent duct 70 on the air conditioning unit 20 side is positioned at the lower part of the air conditioning unit 20 and communicates with the internal air flow path S.

  The floor console 15 extends rearward from the rear end of the center console 1a through the driver seat and the passenger seat. The rear end portion of the floor console 15 is located behind the driver seat and the passenger seat, and the rear end portion of the rear vent duct 70 is located at the rear end portion. The conditioned air is blown out from the air conditioning opening 70a provided at the rear end of the rear vent duct 70 toward the passenger in the second row seat.

  As shown in FIG. 2, the air conditioning unit 20 includes a case main body 21 and a blower fan 22 accommodated in the case main body 21, and the blower fan 22 passes the intake box 19 to the outside of the passenger compartment R 2. Air-conditioned air is generated from the air introduced from the interior of the passenger compartment R2, and this is led out to the ventilator 8, the defrost 9 and the like through outlets 57 and 58, which will be described later. That is, the air conditioning unit 20 cools the air supplied by the blower fan 22 constituted by a centrifugal fan by the evaporator 23 or heats it by the heater core 24 arranged on the downstream side of the air flow of the evaporator 23. Thus, the conditioned air having the required temperature and humidity is generated. As shown in FIG. 2, a scroll-shaped fan housing 25 is formed on the front side of the upper portion of the case body 21.

  In the fan housing 25, the blower fan 22 is accommodated in a state where its axial center is directed in the left-right direction. An inlet 26 for introducing air into the case body 21 is formed on the right side wall of the fan housing 25. The intake box 19 is connected to the inlet 26.

  As shown in FIG. 2, an air flow path 30 is formed around the blower fan 22 in the fan housing 25 to collect the flow of air blown from the blower fan 22 and send it downward. The air flow path 30 extends from the upper side to the lower side in the case main body 21, and the evaporator 23 as a heat exchanger for cooling is disposed at the downstream end thereof.

  The evaporator 23 is not shown in detail in order to cool the air introduced from the inlet 26, but, for example, aluminum alloy tubes and heat transfer fins are alternately arranged and integrated, and the tubes extend. It is placed vertically so that the direction is the vertical direction. Although not shown in the figure, the evaporator 23 is supplied with a refrigerant reduced in pressure through an expansion valve from a refrigerant circuit in the engine room R1 via a cooler pipe. Heat is exchanged between the refrigerant circulating in the tube and the air introduced from the inlet 26 to cool the air.

  The front half of the bottom wall of the case body 21 is inclined downward toward the rear. A holding portion 40 that holds the lower end portion of the evaporator 23 is provided at the front half of the bottom wall so as to protrude upward.

  On the downstream side of the evaporator 23 in the case main body 21, bypassing the heater core 24 and the lower flow path 31 that guides the air that has passed through the evaporator 23 to the heater core 24 as a heat exchanger for heating. An upper flow path 32 directed upward is defined by a partition wall 33 and communicates with the air flow path 30 together.

  The heater core 24 is disposed in the middle of the lower flow path 31 so as to incline downward from directly below the instrument panel member 18 toward the rear, and the air passage surface of the heater core 24 is the bottom of the case body 21. Opposite the wall. The heater core 24 is configured such that a high-temperature coolant is introduced from the engine side, and heat exchange is performed between the high-temperature engine coolant flowing through the tube of the heater core 24 and the air introduced from the inlet 26. The air is heated.

  Further, a case portion 80 is disposed above the heater core 24, and air flow paths 81 and 82 serving as air passages downstream of the heater core 24 are formed. The case portion 80 is divided from the case main body 21 of the air conditioning unit 20.

  Further, as shown in FIG. 2, concave portions 33a and 80a are formed in the partition wall 33 of the case body 21 and the front wall portion of the case portion 80, respectively, and the concave portions 33a and 80a have a substantially circular cross section. An insertion hole H is formed. The instrument panel member 18 is inserted through the insertion hole H, and is disposed through the case body 21 and the case portion 80 in the left-right direction.

  In addition, openings 80 b and 80 c are formed at the upper and lower ends of the case portion 80. By the openings 80 b and 80 c, the air flow path 81 that bypasses the upper flow path 32 and goes upward via the heater core 24. Is formed. Here, in the present embodiment, an air flow extending from the inlet 26 to the outlets 57 and 58 is formed by the channels 30 to 32 and the channel 81.

  In addition, a second air flow path 82 that branches backward from the air flow path 81 is formed at the rear right side of the case portion 80, and an opening 80d is formed at the rear end thereof. Is connected.

  Furthermore, a warm air guide surface 80e extending rearward toward the opening 80d is formed in the case portion 80 at a position spaced upward from the rear portion of the heater core 24, and the warm air guide surface 80e is formed as an air flow path. The ceiling part of 82 is comprised.

  By the way, the rear vent duct 70 extends from the connection duct portion 50 formed at the rear portion of the case main body 21 toward the rear side. The rear vent duct 70 is divided into an upstream duct member 70b in the middle part in the front-rear direction and a downstream duct member 70c that bends upward at the rear end part of the floor console 15.

  The upstream duct member 70b is connected to the rear end of the connection duct portion 50 and extends rearwardly to the cool air flow path 70d, and is positioned above the cool air flow path 70d, and the front end is located behind the hot air duct 90. And a hot air flow path 70e detachably connected to the end. The cold air flow path 70d and the hot air flow path 70e are formed so as to merge with each other on the rear end side.

  For this reason, in this embodiment, as a route through which the air after passing through the evaporator 23 is supplied to the opening 70a on the rear seat side, the downstream duct member 70c flows through the connection duct portion 50 and the cold air flow passage 70d and remains cold. And a second route that is heated by the heater core 24 and flows through the air flow path 82, the hot air duct 90, and the hot air flow path 70e to reach the downstream duct member 70c. .

  FIG. 3A is an enlarged perspective view of a main part showing the structure around the actuator 52, and FIG. 3B is an exploded perspective view of FIG. As shown in FIG. 2 and FIG. 3, the upstream duct member 70b is provided with an air mix door 51 at the junction of the cold air flow path 70d and the hot air flow path 70e. The mixing ratio of the amount of cold air flowing in via the duct portion 50 and the cold air flow passage 70d and the amount of hot air flowing in via the air flow passage 82, the hot air duct 90 and the hot air flow passage 70e It is possible to adjust.

  As shown in FIG. 3, the air mix door 51 includes a flat plate-like blocking plate portion 51 a extending along the opening surface of the communication port portion at the rear end of the cold air flow passage 70 d and the hot air flow passage 70 e, And a support shaft 51b protruding in the left-right direction from the front edge of the closing plate portion 51a.

  One end side (here, the left end portion) of the support shaft 51b is rotatably inserted into and supported by a through hole 70f (see FIG. 3B) formed in the left side wall of the upstream duct member 70b. The front side of the plate portion 51a rotates in the vertical direction around the support shaft 51b.

  An actuator 52 for driving the air mix door 51 is disposed on the outer surface of the upstream duct member 70b. The actuator 52 is configured such that the bolt B is inserted into the insertion hole 52b (see FIG. 3B) of the fastening piece 52a and the hole of the boss portion 70g formed on the outer surface of the upstream duct member 70b. It is fastened and fixed to the outer surface of the side duct member 70b.

  A rotating arm 53 is attached to the output shaft of the actuator 52, and a pin 53a (see FIG. 3B) at the tip thereof is slidably disposed in the long hole 54a of the link mechanism 54. Yes. An insertion hole 54b having a substantially D shape is formed on one end side of the link mechanism 54, and the support shaft 51b is inserted into the insertion hole 54b, so that the support shaft 51b of the air mix door 51 is inserted. Is connected to the actuator 52 via the rotating arm 53 and the link mechanism 54.

  The actuator 52 is connected to a controller which will be described later. By rotating the rotating arm 53 by the actuator 52, the link mechanism 54 is rotated while the pin 53a is slid along the elongated hole 54a. Is possible. Then, as shown in the figure, the one end of the support shaft 51b and the insertion hole 54b are substantially D-shaped and are fitted together, so that both rotate integrally. For this reason, in the air mix door 51, when the driving force of the actuator 52 is transmitted through the rotation arm 53 and the link mechanism 54, the support shaft 51b rotates, and as a result, the closing plate portion 51a can rotate. It can be done.

  In the air mix door 51, the closing plate portion 51a can be held at a closing position where one of the communication port portions is closed, or can be switched to an open position where both the communication port portions are opened. In a state in which both of the communication port portions are opened, by appropriately adjusting the pivot position of the support shaft 51b, that is, the air mix door 51, the cold air flowing from the cold air flow channel 70d and the hot air flow channel 70e flow. The distribution ratio with the hot air can be changed. The parts 70h and 70i shown in FIG. 3 will be described later.

  By the way, as shown in FIG. 2, the downstream ends of the upper flow path 32 and the air flow path 81 communicate with the air mix space 55 formed on the upper rear side in the case body 21 from below. An air mix door 56 is provided below the air mix space 55 to adjust the mixing ratio between the amount of warm air flowing from the air flow path 81 and the amount of cool air flowing from the upper flow path 32. Although not shown, the air mix door 56 is driven by an actuator fixed to the outer surface of the case body 21.

  On the other hand, a vent outlet 57 and a defrost outlet 58 are opened side by side at the upper part of the air mix space 55, and each outlet 57, 58 has a vent door 59 and an adjustable passage opening area. A defrost door 60 is provided. The vent outlet 57 is connected to the upstream end of the vent duct 10 in the instrument panel 1, and the defrost outlet 58 is connected to the upstream end of the defrost duct 11.

  On the rear side of the case body 21, a lead-out duct portion 61 that communicates with the rear lower portion of the air mix space 55 is formed so as to extend obliquely downward rearward. A foot door 62 capable of adjusting the passage cross-sectional area of the communicating portion with the air mix space 55 is disposed at the upstream end portion of the outlet duct portion 61. The rear duct 12 is connected to the lower end of the lead-out duct portion 61 to guide the conditioned air whose temperature is adjusted in the air mix space 55 to the rear seat. The upstream ends of foot ducts (not shown) for the driver's seat and the passenger seat communicate with the left and right sides of the lead-out duct portion 61.

  Although not shown, the vent door 59, the defrost door 60 and the foot door 62 are driven via a link mechanism by an actuator fixed to the outer surface of the case body 21. Depending on the open / closed state of the doors 59, 60, 62, the blowing mode can be switched to any one of the bi-level mode, the differential foot mode, the vent mode, the defrost mode, and the foot mode.

  The bi-level mode is a mode in which the defrost outlet 58 is closed and the vent outlet 57 and the outlet duct 61 are opened. The differential foot mode is a mode in which the vent outlet 57 is closed and the defrost guide is opened. The mode in which the outlet 58 and the outlet duct 61 are opened, and the vent mode is the mode in which the defrost outlet 58 and the outlet duct 61 are closed and the vent outlet 57 is opened. What is the defrost mode? In this mode, the vent outlet 57 and the outlet duct 61 are closed and the defrost outlet 58 is opened. The foot mode is a mode in which the vent outlet 57 and the defrost outlet 58 are closed and the outlet duct part. In this mode, 61 is opened.

  The opening adjustments of the vent door 59, the defrost door 60 and the foot door 62, and the rotation positions of the air mix doors 51 and 56 are based on the operation mode and the blowing mode set according to the operation of the operation dial 5 by the occupant. Done by the controller. When the operation mode of the air conditioning unit 20 is set to the cooling mode, the controller operates the actuator 52 until the air mix door 51 opens the communication port portion at the rear end of the cool air flow path 70d, and the heating mode is set. Then, the actuator 52 is configured to operate until the air mix door 51 closes the communication port portion at the rear end of the hot air flow path 70e.

  Next, the operation of the air conditioner A configured as described above will be described. In the air conditioning unit 20, the air sent to the air flow path 30 by the blower fan 22 flows from the upper side to the lower side and is cooled by passing through the evaporator 23 to become cold air. This cold air flows separately into the lower flow path 31 side and the upper flow path 32 side according to the distribution ratio of the air volume determined by the rotation position of the air mix door 56, and the cold wind toward the lower flow path 31 side is Heated by passing through the heater core 24. Then, the air once divided into the lower flow path 31 and the upper flow path 32 merges in the air mix space 55 and is mixed to be conditioned air having a predetermined temperature and humidity. The conditioned air mixed in the air mix space 55 is supplied to each part of the passenger compartment R2 in accordance with the blowing mode set by the vent door 59, the defrost door 60 and the foot door 62.

  For example, in a car after being left under the hot sun in summer, the room temperature rises, so the occupant operates the operation dial 5 to set the operation mode of the air conditioning unit 20 to strong cooling, that is, the full cold mode. When the operation mode is set to the full cold mode, the controller sets the blowing mode to the vent mode, and connects the downstream end of the air passage 81 and the communication port portion at the rear end of the hot air passage 70e to the air mix door 56. And 51 are fully closed.

  A part of the cool air cooled by the evaporator 23 flows into the air mix space 55 through the upper flow path 32 and blows out from the vent outlet 57, and the remaining cool air passes through the lower flow path 31 and is connected to the connection duct. It flows into the cold air flow path 70d of the rear vent duct 70 through the portion 50. That is, of the air that passes through the evaporator 23, cold air that does not pass through the heater core 24 flows into the rear vent duct 70. For this reason, it becomes possible to guide the cool air to the rear seat and supply it to the rear seat from the air conditioning opening 70a of the rear vent duct 70, and to cool the rear seat efficiently.

  On the other hand, when the occupant desires heating, the controller sets the operation mode to the heating mode and fully closes the downstream end of the upper flow path 32 and the communication port portion at the rear end of the cool air flow path 70d by the air mix doors 56 and 51. To do. As a result, the cool air that has passed through the evaporator 23 does not flow into the upper flow path 32, but flows entirely into the lower flow path 31 to be heated and supplied to the passenger compartment.

  Further, when the operation mode is the heating mode, the rotation position of the air mix door 56 is changed by the set temperature of the occupant, and a part of the cool air that has passed through the evaporator 23 passes through the upper flow path 32 to the air mix space. In some cases, the air flows into the vehicle 55 and is mixed with warm air to be supplied to the passenger compartment.

  In the present embodiment, as shown in FIGS. 1, 2, and 4, the case portion 80 in which the opening portion 80 d is formed is attached to the case body 21, and the opening portion 80 d is connected to the hot air duct 90. When connected to the rear vent duct 70, the rotational position of the air mix door 51 may be changed depending on the set temperature of the occupant, and the cold air and the hot air may be mixed and supplied to the rear seat side. FIG. 4 is a diagram schematically showing the air flow when the case unit 80 is attached.

  In this case, specifically, a part of the cold air that has passed through the evaporator 23 passes through the lower flow path 31 and the connection duct portion 50 as shown by an arrow X in FIG. A part of the warm air that flows into the flow path 70d and passes through the heater core 24 collides with the warm air guide surface 80e as indicated by an arrow Y when it rises, and is guided to the air flow path 82 side, so that the warm air duct The air flows into the hot air flow path 70 e of the rear vent duct 70 through 90.

  In this case, by adjusting the rotation position of the air mix door 51, the conditioned air at a desired temperature is changed to the rear seat by the distribution ratio of the cold air flowing from the cold air flow passage 70 d and the hot air flowing from the hot air flow passage 70 e. It becomes possible to supply to the side.

  By the way, in the air conditioner A which concerns on this embodiment, since the warm air duct 90 is divided | segmented and comprised by the case part 80, in the removal state of the warm air duct 90, instead of the case part 80, FIG. It is possible to attach case part 80 'in which the part corresponding to the opening part 80d is not formed as shown in FIG.

  5A is a perspective view showing a case where the hot air duct 90 is removed in the air conditioner A according to the present invention, and FIG. 5B is a case portion 80 constituting the air conditioner A. FIG. FIG. 6 is a side sectional view of the air conditioner A shown in FIG.

  Similar to the case portion 80, the case portion 80 ′ has a concave portion 80 a ′ formed in the front wall portion thereof, and an insertion hole H ′ for penetrating the instrument panel member 18 is formed by the concave portion 33 a of the partition wall 33 of the case body 21. At the same time, openings 80b 'and 80c' are formed at the upper and lower ends to form an air flow path 81 '. Here, even when the case portion 80 ′ is attached, the air flow extending from the inlet 26 to the outlets 57 and 58 by the flow paths 30 to 32 and the flow path 81 ′ is the same as when the case portion 80 is attached. Is formed.

  On the other hand, a warm air guide surface 80e 'extending upward substantially over the entire surface is formed at the rear portion of the case portion 80, whereby the portion corresponding to the opening portion 80d is closed and the rear vent duct 70 is closed. The connection with the hot air flow path 70e is cut off.

  FIG. 7A is an enlarged perspective view of a main part showing the structure around the fixing member 52 ′, and FIG. 7B is an exploded perspective view of FIG. 7A. When the case portion 80 'is attached in the air conditioner A, the upstream duct member 70b is closed with the communication port portion at the rear end of the hot air flow path 70e instead of providing the actuator 52 and the like for driving the air mix door 51. It is possible to provide a fixing member 52 ′ for fixing the air mix door 51 at the closed position.

  The fixing member 52 ′ has a substantially square shape in a side view, and a support shaft 51 b of the air mix door 51 is fitted in an insertion hole 52 a ′ drilled in a substantially D shape at the upper end. Further, second and third insertion holes 52b ′ and 52c ′ (see FIG. 7B) are formed in the substantially central portion and the lower end of the fixing member 52 ′ in the height direction.

  Further, as shown in FIGS. 3 and 7, the upstream duct member 70b is integrally formed with a locking pin 70h and a boss portion 70i so as to protrude outwardly from the outer surface of the upstream duct member 70b. .

  In FIG. 7, the fixing member 52 ′ is fastened and fixed to the outer surface of the upstream duct portion 70 b by the bolt B ′ inserted through the insertion hole 52 ′ and the hole portion of the boss portion 70 i, and is engaged with the insertion hole 52 c ′. By inserting the stop pin 70h, the rotation of the fixing member 52 'is restricted.

  In this case, as described above, the end of the support shaft 51b and the insertion hole 52b 'are substantially D-shaped, and the two are fitted to each other, thereby restricting the rotation of the support shaft 51b by the fixing member 52'. Thus, the air mix door 51 can be fixed at the closed position.

  Therefore, when the case portion 80 ′ and the fixing member 52 ′ are attached, the cold air that has passed through the evaporator 23 passes through the lower flow path 31 and the connection duct portion 50 as shown by the arrow Z in FIG. While flowing into the cool air flow path 80d of the vent duct 70, the warm air heated through the heater core 24 is not supplied to the rear vent duct 70 because the opening is closed in the case portion 80 '. ing.

  Accordingly, in the case of the case portion 80 ′, the cold air and the hot air are not mixed in the rear vent duct 70 as in the case shown in FIGS. 1 to 4, and the air conditioner A cools the rear seat. It will only have functions. In addition, FIG. 8 is a figure which shows typically an air flow when case part 80 'is attached.

  Thus, the structure for attaching the case portion 80 'is suitable for the case of corresponding to the vehicle specification that guides only the cold air to the rear seat side, and for example, particularly suitable for use in an area where the temperature is relatively high throughout the year. It is.

  As described above, in the air conditioner A according to the present embodiment, the rear vent duct 70 is configured to guide at least the cold air after passing through the evaporator 23, and the case portions 80 and 80 that configure the air flow path downstream of the heater core 24. 'Is divided from the case main body 21, and these can be selectively attached to the case main body 21.

  The case portion 80 is formed with an opening 80d, which is connected to the rear vent duct 70 via the hot air duct 90, while the second case portion 80 ′ has the hot air duct 90 in a detached state. The connection with the rear vent duct 70 is cut off. As a result, it is possible to easily correspond to the vehicle specification that guides only the cool air to the rear vent duct 70 and the vehicle specification that guides the mixed air-conditioning air simply by replacing the case portions 80 and 80 '.

  In addition, when the second case portion 80 'is attached, the air mix door 51 can be fixed to the closed position where the communication port portion at the rear end of the hot air flow path 70e is closed by the fixing member 52'. In the vehicle type specification that guides only the cold air to the vent duct 70, the cold air can be supplied to the rear seat side without leakage. In this case, the air mix door 51 has a mixed air-conditioning air adjustment function in the vehicle type specification that guides mixed air-conditioning air, while it has a cold air leakage prevention function in the vehicle type specification that guides only the cold air to the rear vent duct 70. In addition, the rear vent duct 70 can be shared in both vehicle specifications.

  Further, the case main body 21 and the case portion 80 (or the case portion 80 ′) are divided and the instrument panel member 18 is disposed between the case main body 21 and the case portion 80, so that the air conditioner A and When the instrument panel member 18 is assembled, the instrument panel member 18 and the case portion 80 can be assembled in the order of the air conditioning unit 20 (case body 21), and the assemblability can be improved.

  In the above-described embodiment, the rear vent duct 70 is shared in both vehicle specifications by the air mix door 51. However, the present invention is not necessarily limited to this, for example, as shown in FIG. Thus, when it is set as the vehicle type specification which guide | induces only a cold wind to the rear vent duct 70, you may connect the upstream duct 170b corresponding only to this specification.

  Further, as shown in FIG. 10, a hole 80f may be formed at the edge of the opening 80d of the case 80, and the lid 80g closing the opening 80d may be appropriately fixed with a screw 80h or the like. . In this case, in the case of a vehicle type specification that guides the mixed conditioned air to the rear vent duct 70, the opening 80d is opened without attaching the lid 80g, thereby allowing warm air to flow into the rear vent duct 70. On the other hand, in the case of a vehicle type specification that guides only cool air to the rear vent duct 70, the flow of warm air to the rear vent duct 70 side can be blocked by closing the opening 80d with the lid 80g. Therefore, in the embodiment shown in FIG. 10, it is possible to share the case portion in the specifications for both vehicle types.

  Here, in the present invention, the shape in which the opening is closed is not limited to a shape in which the opening 80d is not formed, and as shown in FIG. 10, a general configuration for blocking the supply of hot air from the opening 80d. Shall be included.

  In the above-described embodiment, the vehicle is a left-hand drive vehicle. However, the vehicle is not limited to this, and may be a right-hand drive vehicle.

In correspondence between the configuration of the present invention and the above-described embodiment,
The air outlet of the present invention corresponds to the ventilator 8 and the defrost 9,
Similarly,
The cooling heat exchanger corresponds to the evaporator 23,
The heat exchanger for heating corresponds to the heater core 24,
The first case portion corresponds to the case portion 80,
The second case portion corresponds to the case portion 80 ',
The fixing mechanism corresponds to the fixing member 52 ′, the bolt B ′, the locking pin 70h, and the boss portion 70i.
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

(A) The perspective view which shows the case where a warm air duct is attached in the vehicle air conditioner which concerns on embodiment of this invention, The perspective view which shows the case part which comprises the vehicle air conditioner shown to (b) (a). The sectional side view when the vehicle air conditioner shown in FIG. 1 is cut at a position including an opening, a hot air duct, and the like. (A) The principal part expansion perspective view which shows the structure of an actuator periphery. (B) An exploded perspective view of (a). The figure which shows typically the air flow when a case part is attached. (A) The perspective view which shows the case where a warm air duct is removed in the vehicle air conditioner which concerns on embodiment of this invention, The perspective view which shows the case part which comprises the vehicle air conditioner shown to (b) (a) . FIG. 6 is a side sectional view of the vehicle air conditioner shown in FIG. 5. (A) The principal part expansion perspective view which shows the structure of a fixing member periphery. (B) An exploded perspective view of (a). The figure which shows typically the air flow when a case part is attached. Side sectional drawing which shows the vehicle air conditioner which concerns on other embodiment of this invention. The perspective view which shows the case part of the vehicle air conditioner which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Instrument panel 8 ... Ventilator 9 ... Defrost 18 ... Strength member (instrument panel member)
DESCRIPTION OF SYMBOLS 20 ... Air-conditioning unit 21 ... Case main body 23 ... Evaporator 24 ... Heater core 26 ... Inlet 30 and 81 ... Air flow path 31 ... Lower flow path 32 ... Upper flow path 51 ... Air mix door 52 '... Fixing member 57 ... Vent guide Outlet 58 ... Defrost outlet 70 ... Rear vent duct 70h ... Locking pin 70i ... Boss part 80, 80 '... Case part 80d ... Opening part 90 ... Hot air duct A ... Vehicle air conditioner B' ... Bolt

Claims (3)

An air conditioning unit installed in the instrument panel of the vehicle and introducing air to generate conditioned air;
A vehicle air conditioner comprising a rear vent duct extending from the air conditioning unit toward the rear seat side behind the driver seat in the passenger compartment,
The air conditioning unit has a case body having an introduction port for introducing air and a discharge port for deriving conditioned air to a blowout port provided in the instrument panel;
An air flow path formed in the case body and extending from the inlet to the outlet.
A cooling heat exchanger arranged in the air flow path to cool the air introduced from the inlet,
A heating heat exchanger disposed on the air flow downstream side of the cooling heat exchanger and heating the air introduced from the inlet through the air flow path,
The rear vent duct is configured to guide the cold air after passing through at least the cooling heat exchanger,
The first and second case parts forming the air flow path downstream of the heating heat exchanger are configured separately from the case body, and can be selectively attached to the case body.
In the state where the first case portion is formed with an opening, and a hot air duct for supplying hot air via an air mix door for adjusting mixed conditioned air is detachably connected to the rear vent duct, While the opening is configured to be connected to the rear vent duct via the hot air duct,
The vehicular air conditioner is configured such that the second case portion has a shape in which the opening is closed, and the connection with the rear vent duct is cut off when the hot air duct is detached. The vehicle air conditioner according to claim 1, further comprising: a fixing mechanism that fixes the air mix door mounted on the rear vent duct to a closed position that closes the warm air side opening. The vehicle air conditioner according to claim 1, wherein an instrument panel member is disposed between the case body and the first and second case portions.

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