JP2015054543A - Vehicle air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of components and the number of assembling steps, and to reduce size, relating to a vehicle air conditioning device.SOLUTION: An air conditioning case 14 constituting a vehicle air conditioning device 10 contains first to third split cases 26, 28, 30 which can be split in width direction. The second split case 28 is separated in a first connection part 34 and a second connection part 36 by a separation wall 38 formed inside. An evaporator 20, a heater core 22, and a blower 18 are housed inside the first connection part 34 and the first split case 26, which function as a heater unit. Meanwhile, the interior of the third split case 30 and the second connection part 36 function as a casing of an inside/outside air switching unit 16, with a filter 52 and a switching damper 50 stored within it.

Description

  The present invention relates to a vehicle air conditioner that is mounted on a vehicle and that adjusts the temperature of the vehicle interior by blowing air that has been temperature-adjusted by a heat exchanger into the vehicle interior.

  2. Description of the Related Art Conventionally, a vehicle air conditioner mounted on a vehicle takes air inside and outside by an air blower into an air conditioning case in which an air passage is formed, and is cooled by an evaporator that is a cooling means and a heater core that is a heating means. After driving the heated air and the air mix door to mix in a desired mixing ratio in the air conditioning case, for example, by blowing air from a plurality of openings provided in the air conditioning case through the air duct into the vehicle interior Temperature and humidity adjustments are made.

  For example, in the vehicle air conditioner as described above, as disclosed in Patent Document 1, a vehicle having a full center structure in which a blower is disposed at a substantially central portion of an air conditioning case is known. The air conditioner includes a unit case in which an evaporator and a heater core are housed, and an inside / outside air switching unit that is connected to a side portion of the unit case and selectively takes in the inside / outside air, and the unit case extends in the width direction. Similarly, the casing of the inside / outside air switching unit is formed so as to be split into two in the width direction. Then, it is assembled with the evaporator and heater core housed inside the unit case divided into two parts, while it is assembled with the switching damper etc. housed inside the inside / outside air switching unit divided into two parts. Then, the casing and the unit case are connected to each other.

JP 2004-249905 A

  However, in the above-described vehicle air conditioner, the unit case in which the evaporator, the heater core, and the like are housed has a divided structure, and the casing of the inside / outside air switching unit for taking in air is formed from the divided structure. Therefore, the number of assembling steps is large, and it is desired to reduce the number of assembling steps by reducing the number of parts. Moreover, since a connection structure for connecting the unit case and the inside / outside air switching unit is required, there is a problem that the width dimension of the vehicle air conditioner is increased by this connection structure.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a vehicle air conditioner that can reduce the number of parts and the number of assembly steps and can be downsized.

In order to achieve the above object, the present invention comprises an inside / outside air switching unit that takes in inside air and outside air by switching, and an air conditioning unit that has a flow path through which air flows and a blower opening that blows air into the passenger compartment. A blower that is provided substantially in the center of the air conditioning unit in the width direction and blows the air into the passenger compartment, an evaporator that is provided inside the air conditioning unit and cools the air, and a heater core that heats the air. In the vehicle air conditioner
A first case portion constituting the air conditioning unit;
A second case part constituting the inside / outside air switching unit;
A third case portion provided between the first case portion and the second case portion and provided to straddle the air conditioning unit and the inside / outside air switching unit;
Have
The rotating shaft of the damper in the inside / outside air switching unit and the driving shaft of the blower extend in the same direction, and the first to third case portions can be divided along the axial direction of the rotating shaft and the driving shaft. It is comprised by this.

  According to the present invention, it has an inside / outside air switching unit that takes in inside air and outside air by switching, and an air conditioning unit that has a flow path through which air flows and a blower opening that blows air into the passenger compartment, and is substantially in the width direction of the air conditioning case. In a vehicle air conditioner provided with a blower in the center, a first case part constituting an air conditioning unit, a second case part constituting an inside / outside air switching unit, and between the first case part and the second case part A rotation shaft of a switching damper in the inside / outside air switching unit provided with a third case portion provided to straddle the air conditioning unit and the inside / outside air switching unit. And can be divided along the axial direction of the drive shaft of the blower.

  Therefore, the casing constituting the vehicle air conditioner is constituted by first to third case parts that can be divided in the axial direction of the rotating shaft of the damper and the driving shaft of the blower, and the first case parts provided at both ends. By providing a third case part that can accommodate a part of the air conditioning unit and the inside / outside air switching unit between the second case part and the unit case and casing of the conventional vehicle air conditioner configured by four divisions, In comparison, the number of parts can be reduced, and accordingly, the number of assembling steps can be reduced. In addition, since it is not necessary to provide a separate connecting means for connecting the unit case containing the evaporator and the casing of the inside / outside air switching unit, the number of parts can be reduced and the width dimension can be reduced. In addition, the rigidity of the casing formed of the first to third case portions can be improved.

  Further, the third case portion is arranged with a rotating shaft of a damper housed in the second case portion and another damper housed in the first case portion being spaced apart from each other in the axial direction. By disposing the rotating shaft of the damper and the damper apart from each other in the axial direction, the damper and the rotating shaft of another damper are prevented from interfering with each other in the third case portion. The damper and the rotating shaft of the damper are prevented from interfering with each other.

  Further, the third case portion has a separation wall between the air conditioning unit and the inside / outside air switching unit, and the length from the separation wall to the connection surface with the second case portion is set in the width direction of the second case portion. By forming the third case portion short with respect to the length along the length, it is possible to reduce the size of the molding machine by shortening the stroke in the axial direction (punching direction) at the time of die cutting when the third case portion is molded. At the same time, the mold release property can be improved.

  According to the present invention, the following effects can be obtained.

  That is, the casing constituting the vehicle air conditioner is constituted by first to third case parts that can be divided in the axial direction of the rotating shaft of the damper and the driving shaft of the blower, and the first case parts provided at both ends. Compared to the unit case of a conventional vehicle air conditioner, by providing the third case part that can accommodate part of the air conditioning unit and the inside / outside air switching unit between the second case part and the number of parts and assembly man-hours In addition, since it is not necessary to separately provide a connecting means for connecting the air conditioning unit and the inside / outside air switching unit, the width can be reduced.

1 is an external perspective view of a vehicle air conditioner according to an embodiment of the present invention. It is a front view of the vehicle air conditioner shown in FIG. It is sectional drawing of the inside / outside air switching unit along the III-III line of FIG. It is sectional drawing of the air-conditioning case along the IV-IV line of FIG.

  DESCRIPTION OF EMBODIMENTS Preferred embodiments of a vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention. In the following description, the left side (arrow A direction) of the vehicle air conditioner 10 shown in FIG. 1 is described as the front side of the vehicle, and the right side (arrow B direction) is described as the rear side of the vehicle.

  As shown in FIGS. 1 to 4, the vehicle air conditioner 10 includes an air conditioning case (casing) 14 constituting each air passage 12, and an inside / outside air that is provided inside the air conditioning case 14 and takes in outside air / inside air. An air switching unit 16, a blower 18 disposed inside the air conditioning case 14, an evaporator 20 that cools the air, a heater core 22 that heats the air, and a flow of air that flows through each of the passages 12. And a damper mechanism 24 for switching between.

  The air conditioning case 14 includes first to third divided cases 26, 28, 30 that can be divided in a width direction (arrow C direction) perpendicular to the front-rear direction of the vehicle, and the first divided case (first case portion) 26. The lower case 32 is provided so as to cover a part of the second divided case (third case portion) 28. The first to third divided cases 26, 28, 30 and the lower case 32 described above are made of, for example, a resin material.

  For example, the first split case 26 is disposed on the driver's seat side when mounted on the vehicle, and one end side (arrow C1 direction) along the width direction (arrow C direction) is closed and the other end side (arrow C2 direction). Is formed in an open hollow shape. A second divided case (third case portion) 28 is connected to the other end of the first divided case 26.

  The second split case 28 is sandwiched between the first split case 26 and the third split case (second case portion) 30, and is formed on one end side (in the direction of the arrow C1) along the width direction. A first connection portion 34 connected to the split case 26 and a second connection portion 36 formed on the other end side (arrow C2 direction) along the width direction and connected to the third split case 30 are provided. A separation wall 38 (see FIG. 2) is formed between the first connection portion 34 and the second connection portion 36.

  The first connection portion 34 is formed in substantially the same cross-sectional shape as the first divided case 26, and the second connection portion 36 is formed with a small cross-sectional area with respect to the first connection portion 34, and is formed on the separation wall 38. The inside of the first connection part 34 and the inside of the second connection part 36 communicate with each other through the opened suction port 40.

  Then, in a state where the first divided case 26 and the second divided case 28 are connected, the evaporator 20 and the heater core 22 are provided inside the first connecting portion 34 and the first divided case 26 in the second divided case 28. The blower 18 and the damper mechanism 24 are accommodated, and each passage 12 through which air flows is formed. That is, the 1st connection part 34 of the 1st division | segmentation case 26 and the 2nd division | segmentation case 28 in the air-conditioning case 14 functions as a casing of a heater unit (air-conditioning unit).

  In addition, a vent blower opening 42 and a defroster blower opening 44 that open upward are formed in the first connection portion 34 of the first split case 26 and the second split case 28. The vent blower opening 42 is provided to blow air near the occupant's face, and the defroster blower opening 44 is provided adjacent to the vent blower hole 42 to blow air near the front window of the vehicle. The vent air vent 42 is disposed on the vehicle rear side (arrow B direction), and the defroster air vent 44 is disposed on the vehicle front side (arrow A direction).

  On the other hand, the second connection portion 36 is a suction port in which the inside / outside air switching unit 16 is accommodated in the state where the third divided case 30 is connected, and which opens to the rear side of the separation wall 38 (in the direction of arrow B). The inside / outside air switching unit 16 and the heater unit communicate with each other through 40.

  For example, the third split case 30 is disposed on the passenger seat side when mounted on the vehicle, is connected to the second connection portion 36 of the second split case 28, closes the opening of the second connection portion 36, and A part of the inside / outside air switching unit 16 is housed inside. That is, the second connecting portion 36 and the third divided case 30 of the second divided case 28 in the air conditioning case 14 function as a casing of the inside / outside air switching unit 16.

  As shown in FIG. 3, outside air introduction that takes in outside air so as to straddle the second divided case 28 and the third divided case 30 is provided in the second connecting portion 36 of the third divided case 30 and the second divided case 28. The mouth 46 and the inside air introduction port 48 for taking in the inside air are opened. The outside air inlet 46 opens above the second and third divided cases 28 and 30 and is connected to a suction duct (not shown) extending into the engine room of the vehicle. On the other hand, the inside air introduction port 48 is formed so as to be substantially orthogonal to the outside air introduction port 46 and to open to the vehicle front side (arrow A direction).

  Further, inside the second and third divided cases 28 and 30, as shown in FIG. 3, a switching damper (damper) 50 for switching the open state of the outside air introduction port 46 and the inside air introduction port 48 is circulated through the inside. And a filter 52 for removing dust and the like contained in the air.

  Further, as shown in FIG. 2, the length along the width direction (arrow C direction) of the casing composed of the second connection portion 36 and the third divided case 30 is the length L1 of the third divided case 30. Is formed longer than the length L2 of the second connecting portion 36 in the second split case 28 (L1> L2). The length of the second connection portion 36 is the length from the separation wall 38 to the connection surface with the third divided case 30.

  The switching damper 50 is formed, for example, in a fan shape in section, and a damper shaft 54 is inserted into an opening end portion of the switching damper 50. The damper shaft 54 is arranged in the width direction of the second and third divided cases 28 and 30 (in FIG. As shown in FIG. 2, one end portion thereof is provided so as to be rotatable with respect to the support portion 51 formed on the separation wall 38 of the second divided case 28, and the like. The end portion is provided to be rotatable with respect to the third divided case 30. The support portion 51 protrudes at a predetermined height from the separation wall 38 toward the third divided case 30 (in the direction of arrow C2). Then, when the switching damper 50 is rotated under the drive action of an actuator (not shown), either the outside air introduction port 46 or the inside air introduction port 48 is caused by the wall portion formed on the side opposite to the opening end portion. It is selectively blocked.

  For example, the filter 52 is inserted from a filter insertion opening 56 opened downward so as to straddle the second connection portion 36 and the third divided case 30 in the second divided case 28. In addition, it is disposed between the suction port 40 and the outside air introduction port 46 and the inside air introduction port 48, and is stored with an inclination of a predetermined angle so as to face the outside air introduction port 46 and the inside air introduction port 48.

  For example, as shown in FIGS. 2 and 4, the blower 18 is a centrifugal fan having a rotary fan 58 having a plurality of fins and a drive source 60 that rotationally drives the rotary fan 58. The blower 18 is disposed substantially horizontally so that the axes of the rotary fan 58 and the drive source 60 extend in the vehicle width direction (arrow C direction) in the first and second divided cases 26 and 28. It arrange | positions so that the 1st division | segmentation case 26 and the 1st connection part 34 of the 2nd division | segmentation case 28 may be straddled. The blower 18 is provided in a straight line so that the rotary fan 58 is on the third divided case 30 side (in the direction of the arrow C2) and faces the suction port 40 opened in the separation wall 38.

  In other words, the vehicle air conditioner 10 is a full center type HVAC (Heating, Ventilation, and Air Conditioning) in which a blower 18 is provided at a substantially center in the width direction of the air conditioning case 14.

  Then, when the drive source 60 is driven to rotate based on a control signal from a controller (not shown), the rotary fan 58 rotates integrally with it, and accordingly, the inside air introduction port 48 or the outside air introduction port 46 in the inside / outside air switching unit 16. Air is taken in and sucked from one end side of the rotary fan 58 to the center through the suction port 40 opened in the separation wall 38, and then into the passage 12 formed in the first and second divided cases 26 and 28. Is sent out.

  As shown in FIG. 4, the evaporator 20 is provided below the blower 18 so as to straddle the first connection portion 34 of the first divided case 26 and the second divided case 28, for example. It arrange | positions so that only a predetermined angle may incline with respect to a direction (arrow D direction). A refrigerant is circulated through the evaporator 20 through a plurality of tubes (not shown), and the air passes through fins provided between the tubes, so that heat exchange between the air and the refrigerant is performed. The air thus supplied is supplied to the downstream side of the evaporator 20.

  The heater core 22 is provided, for example, on the downstream side which is the vehicle front side (arrow A direction) from the evaporator 20 inside the first connection portion 34 of the first divided case 26 and the second divided case 28, and is similar to the evaporator 20. In addition, the air conditioner case 14 is inclined by a predetermined angle with respect to the height direction (arrow D direction) and is arranged substantially in parallel. In the heater core 22, hot water is circulated through a plurality of tubes (not shown). When air passes through fins provided between the tubes, heat exchange between the air and the hot water is performed. The air thus supplied is supplied to the downstream side of the heater core 22.

  As shown in FIG. 4, the damper mechanism 24 includes an air mix damper 62 provided between the evaporator 20 and the heater core 22, a first switching damper 64 that switches a ventilation state of the vent blower opening 42 and the defroster blower 44. And a second switching damper 66 for switching the blowing state of the defroster blowing port 44 and the foot blowing port 68.

  The air mix damper 62 is formed in, for example, a curved plate shape, provided along the width direction of the air conditioning case 14, and guide means (not shown) provided on both inner sides of the air conditioning case 14. Will be guided along. A rack gear 70 is provided on the inner wall surface of the air mix damper 62 along the sliding direction of the air mix damper 62, and the pinion gear 74 of the shaft 72 that is pivotally supported by the air conditioning case 14 is engaged.

  By rotating the shaft 72 under the driving action of an actuator (not shown), the air mix damper 62 is provided so as to be slidable in a substantially horizontal direction along the guide means. Then, the air mix damper 62 moves to adjust the mixing ratio between the air cooled by the evaporator 20 (cold air) and the air heated by the heater core 22 (warm air) and blow the air downstream.

  The first switching damper 64 is a butterfly damper that is pivotally supported between the vent air blowing port 42 and the defroster air blowing port 44, and the shaft portion 76 is formed between the side wall of the first divided case 26 and the second divided case 28. Each is supported by the separation wall 38 so as to be rotatable. The first switching damper 64 communicates with the downstream side of the evaporator 20 and the vent air blowing port 42 and the defroster air blowing port 44 by rotating by a predetermined angle around the shaft portion 76 under the driving action of an actuator (not shown). The state is switched.

  The second switching damper 66 is formed in a fan shape in cross section, and the shaft portion 78 is pivotally supported with respect to the side wall of the first split case 26 and the separation wall 38 of the second split case 28, respectively, under the driving action of an actuator (not shown). The communication state of the foot blower opening 68 is switched by rotating about a predetermined angle about the shaft portion 78.

  The shaft portion 76 of the first switching damper 64 and the shaft portion 78 of the second switching damper 66 are provided so as to be separated from each other by a predetermined distance in the height direction of the separation wall 38 (arrow D direction). Between the shaft portion 76 of the first switching damper 64 and the shaft portion 78 of the second switching damper 66, the damper shaft 54 (in the form of a two-dot chain line in FIG. 4) of the switching damper 50 is pivotally supported. . That is, the two shaft portions 76 and 78 and the damper shaft 54 are arranged so as to be offset from each other in the height direction (arrow D direction) so as not to overlap with each other on the separation wall 38.

  2, the damper shaft 54 of the switching damper 50 and the shaft portion 78 of the second switching damper 66 are in the width direction of the air conditioning case 14 (in the direction of arrow C), that is, the damper shaft 54 and the Since the end portions of the shaft portion 78 are arranged so as to be spaced apart from each other by a predetermined distance, the switching damper 50 does not contact the shaft portion 78, and at the same time, the second switching damper 66 is a damper. There is no contact with the shaft 54.

  The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above. Next, its operation and effects will be described.

  First, an occupant (not shown) operates an operation lever disposed in a vehicle compartment of a vehicle on which the vehicle air conditioner 10 is mounted, so that an actuator (not shown) is driven according to the operation of the operation lever. Then, the shaft rotates by a predetermined angle, and the air mix damper 62 is slid and displaced by a predetermined distance toward the front side or the rear side of the vehicle under the guiding action by a guide means (not shown).

  At the same time, based on a control signal from a controller (not shown), the drive source 60 of the blower 18 is driven to rotate, and the rotary fan 58 rotates. As a result, air is sucked into the casing through either the inside air introduction port 48 or the outside air introduction port 46 of the inside / outside air switching unit 16, passes through the filter 52, and dust and the like are removed. It is taken into the first and second divided cases 26 and 28, sucked into the center from one end side of the rotary fan 58, and sent out to the outer peripheral side.

  As shown in FIG. 4, the air sent out from the blower 18 circulates downward through the passage 12 formed downstream, is cooled by passing through the evaporator 20, and then passes through the heater core 22. The temperature is adjusted to a desired temperature by being mixed with the air and is blown into the vehicle interior through the vent air blowing port 42 or the defroster air blowing port 44.

  As described above, in the present embodiment, the evaporator 20, the heater core 22, and a part of the blower 18 are housed in the full-center type vehicle air conditioner 10 in which the blower 18 is provided at the substantially center in the width direction of the air conditioning case 14. First divided case 26, a third divided case 30 in which a part of the inside / outside air switching unit 16 is accommodated, and a second divided portion provided between the first divided case 26 and the third divided case 30. The air conditioning case 14 is constituted by the case 28, the first to third divided cases 26, 28, 30 are provided so as to be divided in the width direction (arrow C direction), and the first divided case 26 and the second divided case 26 are provided. The axis of the shaft 72 of the first and second switching dampers 64 and 66 and the air mix damper 62 provided inside the first connection portion 34 of the split case 28, and the second split case 28. It is formed such that the axis of the second connecting portion 36 and the damper shaft 54 of the switching damper 50 provided inside the third separate casing 30 is substantially the same direction (arrow C).

  As a result, the air-conditioning case 14 has a three-divided structure in which the second divided case 28 capable of accommodating a part of the heater unit and the inside / outside air switching unit 16 is provided therein, so that a unit case and a casing having a four-part structure are provided. Compared to the vehicle air conditioner according to the related art having the above, the number of parts can be reduced, and accordingly, the number of assembling steps can be reduced.

  Further, a common second divided case 28 in which a part of the heater unit and the inside / outside air switching unit 16 is accommodated is provided between the first divided case 26 and the third divided case 30, and the second divided case 28 is Since the first divided case 26 and the third divided case 30 are connected to each other, the unit case storing the evaporator or the like and the casing of the inside / outside air switching unit are connected as in the prior art, and the inside There is no need to separately provide a connecting means for communicating with each other, and the rigidity of the air conditioning case 14 including the first to third divided cases 26, 28, and 30 can be improved. As a result, it is possible to reduce the number of parts and reduce the size in the width direction (arrow C direction) by increasing the rigidity of the vehicle air conditioner 10 and eliminating the connection means.

  Further, in the second split case 28, the shaft portions 76 and 78 of the first and second switching dampers 64 and 66 provided on the first split case 26 side, and the damper of the switching damper 50 provided on the third split case 30 side. The shaft 54 is pivotally supported with respect to the separation wall 38, and the damper shaft 54 and the shaft portions 76 and 78 are separated from each other in the width direction (arrow C direction) of the air conditioning case 14. By arranging, the shaft parts 76 and 78 of the first and second switching dampers 64 and 66 arranged on the first divided case 26 side with respect to the same separation wall 38 and the third divided case 30 side are arranged. This prevents the damper shaft 54 of the switching damper 50 from interfering with each other. That is, the shaft portions 76 and 78 do not come into contact with the switching damper 50, while the damper shaft 54 does not come into contact with the first and second switching dampers 64 and 66.

  Furthermore, when the second divided case 28 is molded, it is possible to reduce the size of the molding machine by shortening the stroke in the axial direction (punching direction, direction of arrow C) at the time of die cutting. Property can be improved. As a result, the manufacturing process can be shortened and the yield can be improved.

  In addition, the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 14 ... Air conditioning case 16 ... Inside / outside air switching unit 18 ... Blower 20 ... Evaporator 22 ... Heater core 24 ... Damper mechanism 26 ... 1st division | segmentation case 28 ... 2nd division | segmentation case 30 ... 3rd division | segmentation case 34 ... 1st DESCRIPTION OF SYMBOLS 1 Connection part 36 ... 2nd connection part 38 ... Separation wall 40 ... Suction port 50 ... Switching damper 62 ... Air mix damper 64 ... 1st switching damper 66 ... 2nd switching damper

Claims (3)

An air-conditioning unit having an inside-outside-air switching unit that takes in the inside air and outside air by switching, and a flow path through which air flows and a blower opening that blows air into the passenger compartment, and is provided at a substantially center in the width direction of the air-conditioning unit. In a vehicle air conditioner having a blower that blows air into a vehicle interior, an evaporator that is provided inside the air conditioning unit and that cools the air, and a heater core that heats the air,
A first case portion constituting the air conditioning unit;
A second case part constituting the inside / outside air switching unit;
A third case portion provided between the first case portion and the second case portion and provided to straddle the air conditioning unit and the inside / outside air switching unit;
Have
The rotating shaft of the damper in the inside / outside air switching unit and the driving shaft of the blower extend in the same direction, and the first to third case portions can be divided along the axial direction of the rotating shaft and the driving shaft. It is comprised in the vehicle air conditioner characterized by the above-mentioned. The vehicle air conditioner according to claim 1,
In the third case portion, a rotation shaft of the damper housed in the second case portion and another damper housed in the first case portion are arranged apart from each other in the axial direction, The vehicle air conditioner characterized in that the rotating shaft of the another damper and the damper are arranged apart from each other in the axial direction. The vehicle air conditioner according to claim 1 or 2,
The third case portion has a separation wall between the air conditioning unit and the inside / outside air switching unit, and a length from the separation wall to a connection surface with the second case portion is the second case portion. The vehicle air conditioner is characterized by being formed shorter than the length along the width direction.

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