JP6373644B2 - Air conditioner for vehicles - Google Patents

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, for example, as disclosed in Patent Document 1, takes air inside and outside by an air blower into an air conditioning case in which an air passage is formed inside, and uses an evaporator as a cooling means. After the cooled air and the air heated by the heater core, which is a heating means, are mixed at a desired mixing ratio in the air conditioning case by driving the air mix door, for example, a plurality of openings provided in the air conditioning case The temperature and humidity are adjusted by blowing air from the section into the vehicle compartment through the air duct.

JP 2008-296685 A

  Like the vehicle air conditioner described above, an opening for blowing air into the vehicle interior is provided on the side surface of the air conditioning case parallel to the flow direction of the air flowing through the air passage due to restrictions on the layout when mounted on the vehicle. May be provided. However, since the air flow direction and the opening surface of the opening are parallel, it is difficult for the air to flow from the opening to the outside, and the air staying in the vicinity of the opening is within the air conditioning case orthogonal to the flow direction. By hitting the wall surface, a vortex is wound up and a reverse flow is generated, and the air blowing resistance is increased.

  The present invention has been made in consideration of the above-described problems, and can smoothly guide air from the air-conditioning case to the outside through the opening, and can increase the blowing amount by reducing the blowing resistance. An object is to provide a vehicle air conditioner.

In order to achieve the above object, the present invention provides an air conditioning case having a flow path through which air flows, a blower that is provided inside the air conditioning case and blows air into the vehicle interior, and is provided inside the air conditioning case. In a vehicle air conditioner having a heat exchanger for exchanging heat of air,
The air conditioning case has an opening on the side surface of the case orthogonal to the ventilation surface of the heat exchanger arranged in the flow path,
Facing the opening, standing from the inner wall surface of the air conditioning case, extending in a direction substantially orthogonal to the opening surface of the opening , deflecting the air that has passed through the heat exchanger and guiding it to the opening A guide portion is provided.

  According to the present invention, the air conditioning case constituting the vehicle air conditioner includes the opening on the side surface in the width direction substantially orthogonal to the ventilation surface of the heat exchanger, and the guide portion provided so as to face the opening. The flow of air that has passed through the heat exchanger is deflected and guided to the opening side.

  Therefore, it is possible to smoothly blow air to the outside by reliably deflecting the flow direction of the air heat-exchanged by the heat exchanger toward the opening by the guide, and the air is guided near the opening. The vortex is suppressed by hitting. As a result, the occurrence of a backflow of air in the vicinity of the opening is prevented, and the blowing resistance when the air is blown into the vehicle interior is reduced, so that the amount of blown air can be increased.

  Further, by providing the guide portion in the vicinity of the opening, the air flowing in the vicinity of the opening in the air conditioning case can be reliably deflected and guided to the opening.

  Furthermore, by providing the guide portion in the entire width direction of the flow path, it is possible to suppress the air flowing in the vicinity of the opening from swirling in the entire width direction, and thus it is possible to reliably reduce the blowing resistance. It becomes.

Furthermore, the air conditioning case is dividable formed by dividing plane in the width direction substantially central in the flow path, the guide portion extends in a direction substantially perpendicular to the dividing plane of the air conditioning case, the heat exchanger or equal to erected the plate member so as to prevent blowing passing through. As a result, the guide portion can be integrally formed when the air conditioning case is molded while satisfying the guide function for guiding the warm air to the opening side, and thus the manufacture thereof is facilitated.

  Still further, the blower may be a heat opening that is disposed at the same position in the vehicle width direction as the heat exchanger and at the rear of the vehicle with respect to the heat exchanger, and the opening is a heat opening that guides air flow to the feet of the occupant in the passenger compartment. Thus, the guide portion is provided so as to face the heat opening portion, which is suitable for blowing air through the heat opening portion opened on the side surface in the width direction of the air conditioning case in the full center type vehicle air conditioner.

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

  That is, the air conditioning case constituting the vehicle air conditioner includes an opening on the side surface in the width direction substantially orthogonal to the ventilation surface of the heat exchanger, and the heat exchanger is provided by a guide portion provided so as to face the opening. The flow of air that has passed is deflected and guided to the opening side. Thus, the flow direction of the air heat-exchanged by the heat exchanger is surely deflected to the opening side by the guide part so that the air can be smoothly blown to the outside, and the air is swirled in the vicinity of the opening part. Can be suppressed. As a result, the occurrence of backflow in the vicinity of the opening is prevented, and the blowing resistance when blowing air into the passenger compartment is reduced, so that the amount of blowing can be increased.

1 is an overall cross-sectional view of a vehicle air conditioner according to an embodiment of the present invention. It is a partially cutaway front view of the vehicle air conditioner shown in FIG. It is an expanded sectional view which shows the foot ventilation port vicinity of FIG. It is an expansion perspective view which shows the foot ventilation port vicinity in the vehicle air conditioner 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 right side (arrow A direction) of the vehicle air conditioner 10 shown in FIG. 1 will be described as the front side of the vehicle, and the left side (arrow B direction) will be described as the rear side of the vehicle.

  As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioning case 12 that constitutes each passage of air, a blower 14 disposed in the air conditioning case 12, and an evaporator 16 that cools the air. And a heater core (heat exchanger) 18 for heating the air, and a damper mechanism 20 for switching the flow of air flowing through the passages.

  As shown in FIGS. 1 and 2, the air conditioning case 12 is mounted on, for example, first and second divided cases 22 and 24 having substantially symmetrical shapes, and lower portions of the first and second divided cases 22 and 24. The first and second divided cases 22 and 24 are orthogonal to the vehicle front-rear direction (arrow A and B directions in FIG. 1) with the dividing surface 12a (see FIG. 2) as a boundary. The lower case 26 is provided so as to straddle the first divided case 22 and the second divided case 24 while being splittable in the width direction (the direction of arrow C in FIG. 2).

  Further, as shown in FIG. 1, above the air conditioning case 12 (in the direction of arrow D <b> 1), a vent air vent 28 that blows air in the vicinity of the occupant's face, and a front window of the vehicle adjacent to the vent air vent 28. A defroster blower opening 30 for blowing air is opened in the vicinity. In addition, it forms adjacently so that the vent ventilation port 28 may become the vehicle rear side (arrow B direction) and the defroster ventilation port 30 may become the vehicle front side (arrow A direction).

  Furthermore, as shown in FIG. 2, a pair of foot air vents (on the side walls 22 a and 24 a of the first and second divided cases 22 and 24 along the width direction (arrow C direction) of the air conditioning case 12, respectively. Heat opening portions 32a and 32b are opened. As shown in FIGS. 1 to 4, the foot air vents 32 a and 32 b are provided, for example, in the air conditioning case 12 at a position on the vehicle front side (arrow A direction) with respect to the blower 14, and the vertical direction is long. It is formed in a rectangular shape. A duct 34 (see FIG. 2) is connected to the foot air vents 32a and 32b from the outside of the first and second divided cases 22 and 24, and the foot air vents 32a and 32b pass through the duct 34 in the vehicle interior. Air is blown to the vicinity of the passenger's feet.

  Further, as shown in FIG. 3, a first inner wall surface 36 extending in a vertical direction is formed in the vicinity of the foot air vents 32a and 32b at a position on the front side of the vehicle (in the direction of arrow A), and upward (indicated by an arrow). A substantially horizontal second inner wall surface 38 extending in the vehicle front-rear direction (arrows A and B directions) is formed in the direction D1. That is, as shown in FIG. 3, the foot air vents 32 a and 32 b are opened so as to face corners surrounded by the first and second inner wall surfaces 36 and 38.

  A plate-shaped air guide (guide part) 40 is provided so as to face the foot air vents 32a and 32b, and the air guide 40 is a plate having a certain thickness and extends in the vertical direction on the vehicle front side. Provided on the first inner wall surface 36 of the first and second split cases 22, 24.

  As shown in FIG. 3, for example, the air guide 40 protrudes by a predetermined height from the first inner wall surface 36 toward the vehicle rear side (arrow B direction), and in the width direction (arrow C direction) of the air conditioning case 12. Along the horizontal direction. And it forms in a straight line until the one end part of the ventilation guide 40 is located in the foot ventilation port 32a vicinity of the 1st division | segmentation case 22, and the other end part is located in the vicinity of the foot ventilation port 32b of the 2nd division | segmentation case 24.

  Further, the air blowing guide 40 is provided at a substantially central portion along the vertical direction of the foot air blowing ports 32a and 32b, and the protruding height is set to be located at the center in the width direction of the foot air blowing ports 32a and 32b. Is done. That is, the front end of the air blowing guide 40 is formed so as to be located at the approximate center in the opening area of the foot air blowing ports 32a and 32b.

  On the other hand, the blower 14 is housed inside the air conditioning case 12 at a position on the upper side (arrow D1 direction) and on the rear side of the vehicle (arrow B direction).

  The blower 14 is provided at a substantially center in the width direction of the air-conditioning case 12 so as to straddle between the first divided case 22 and the second divided case 24, and is a drive source composed of a motor or the like that is rotationally driven under energization. 42 and a fan 44 having a plurality of fins on the peripheral surface and connected to the drive shaft of the drive source 42.

  A spiral air passage 46 is formed in the air conditioning case 12 so as to surround the outer peripheral side of the blower 14, and the air passage 46 is counterclockwise from the lower side of the blower 14 when viewed from the first divided case 22 side. The passage cross-sectional area gradually increases and extends toward the front side of the vehicle (in the direction of arrow A).

  Below the air passage 46 (in the direction of arrow D2), a first passage 48 is formed inside the lower case 26, and the first passage 48 is downward (in the direction of arrow A2) downward (in the direction of arrow D2). And is formed on the upstream side of the evaporator 16. And after the air taken in from the outside under the drive effect | action of the air blower 14 distribute | circulated spirally along the ventilation path 46, it goes to the 1st channel | path 48 formed in the downward side (arrow D2 direction) of the air-conditioning case 12. It is distributed and supplied to the evaporator 16.

  The evaporator 16 is, for example, arranged with a predetermined angle with respect to the height direction of the air conditioning case 12 so that the upper end is on the vehicle rear side (arrow B direction) and the lower end is on the vehicle front side (arrow A direction). In addition, the upper end portion is disposed below the blower 14. A refrigerant is circulated through the evaporator 16 through a plurality of tubes (not shown), and air from the first passage 48 passes through fins provided between the tubes, so that the air and the refrigerant Heat exchange is performed, and the cooled air is supplied to the downstream side of the evaporator 16.

  Further, the air conditioning case 12 is provided with a second passage 50 on the downstream side of the evaporator 16. The second passage 50 is provided with an air mix damper 52 constituting the damper mechanism 20, and downstream of the second passage 50. On the side, a heater core 18 is provided on the front side of the vehicle (in the direction of arrow A). The second passage 50 communicates with the third passage 54 extending to the vent air vent 28 on the vehicle rear side (in the direction of arrow B), and the communication between the second passage 50 and the heater core 18 or the third passage 54. The state can be switched by the air mix damper 52.

  The third passage 54 is formed at a position on the front side of the vehicle (in the direction of arrow A) with respect to the blower 14, and extends in a substantially straight line upward (in the direction of arrow D <b> 1) toward the vent air blowing port 28. Yes.

  The heater core 18 is provided in the air conditioning case 12 on the front side of the vehicle (in the direction of arrow A), and similarly to the evaporator 16, its upper end is on the rear side of the vehicle (in the direction of arrow B) and its lower end is on the front side of the vehicle (in the direction of arrow A). Inclined by a predetermined angle so that The heater core 18 is provided substantially parallel to the evaporator 16 with the second passage 50 interposed therebetween, and the ventilation surface 18 a through which air passes is provided so as to be orthogonal to the extending direction of the second passage 50. In other words, the heater core 18 is disposed such that the ventilation surface 18 a is substantially orthogonal to the side walls 22 a and 24 a of the first and second divided cases 22 and 24 in the air conditioning case 12.

  And the warm water is circulated through the heater core 18 through a plurality of tubes (not shown), and the air from the second passage 50 passes through the fins provided between the tubes. Heat exchange is performed, and the heated air flows to the fourth passage 56 formed on the downstream side of the heater core 18.

  The damper mechanism 20 includes an air mix damper 52 provided between the evaporator 16 and the heater core 18, a first switching damper 58 that switches the ventilation state of the vent air outlet 28 and the defroster air outlet 30, a third passage 54, and a fourth passage. A second switching damper 60 is provided between the passage 56 and switches the blowing state of the defroster blower 30 and the foot blowers 32a and 32b.

  The air mix damper 52 is formed in, for example, a curved plate shape, provided along the width direction of the air conditioning case 12, and guide means (not shown) provided on both inner sides of the air conditioning case 12. Will be guided along. A rack gear 62 is provided on the inner wall surface of the air mix damper 52 along the sliding direction of the air mix damper 52, and a pinion gear 66 of a shaft 64 that is pivotally supported by the air conditioning case 12 is engaged.

  The shaft 64 rotates under the driving action of an actuator (not shown), so that the air mix damper 52 slides in a substantially horizontal direction along the guide means and faces the heater core 18 in the second passage 50 (see FIG. 1). ) To a position facing the third passage 54. When the air mix damper 52 moves, the mixing ratio between the air cooled by the evaporator 16 (cold air) and the air heated by the heater core 18 (warm air) is adjusted and blown downstream.

  The first switching damper 58 is pivotally supported between the vent air blowing port 28 and the defroster air blowing port 30, and is rotated by a predetermined angle around the shaft portion under the drive action of an actuator (not shown), whereby the third passage 54. And the vent air outlet 28 and the defroster air outlet 30 are switched.

  The second switching damper 60 is formed in a fan shape in cross section, and the shaft portion is pivotally supported with respect to the first and second divided cases 22 and 24, respectively, and is driven at a predetermined angle around the shaft portion under the driving action of an actuator (not shown). The communication state of the 4th channel | path 56, the 3rd channel | path 54, and the foot ventilation ports 32a and 32b is switched by rotating only.

  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, the case where the cooling operation for lowering the room temperature in the passenger compartment is performed will be described. When a passenger (not shown) operates the operation lever in the passenger compartment and selects the cooling operation, an actuator (not shown) is driven according to the operation of the operation lever, and the air mix damper 52 is guided forward by the guide means. Slide a predetermined distance to the side (arrow A direction). Thereby, as shown in FIG. 1, the second passage 50 and the third passage 54 communicate with each other in the air conditioning case 12.

  At the same time, when the blower 14 is driven based on a control signal from a controller (not shown), air is sucked into the air conditioning case 12 through an inlet (not shown) so that the air turns along the air passage 46. After flowing downward, heat exchange is performed by passing through the evaporator 16 and cooling to a predetermined temperature.

  The cooled air circulates upward from the second passage 50 to the third passage 54, and then enters the vehicle interior through the vent air vent 28 opened under the switching action of the first switching damper 58. Supplied.

  Next, the case where the heating operation for raising the room temperature in the passenger compartment is selected and the warm air is blown near the feet of the passengers in the passenger compartment will be described.

  First, by operating an operation lever (not shown) to select heating operation, the air mix damper 52 slides a predetermined distance toward the vehicle rear side (arrow B direction), and the second passage 50 and the third passage 54 The communication is cut off. After the air blown from the blower 14 and cooled by passing through the evaporator 16 is heated to a predetermined temperature by passing through the heater core 18 from the second passage 50 and flows upward through the fourth passage 56, The air is supplied from the foot vents 32a and 32b through the duct 34 to the vicinity of the feet of the passenger in the passenger compartment.

  At this time, the air flowing through the fourth passage 56 passes through the heater core 18 of the air conditioning case 12 and then flows vertically upward, and the flow direction and the opening directions of the foot air vents 32a and 32b are substantially orthogonal to each other. Therefore, as shown in FIG. 3, a part of the air does not flow well to the foot air vents 32a and 32b but hits the second inner wall surface 38, so that it rotates clockwise in the vicinity of the foot air vents 32a and 32b. It becomes the eddy current. When a part of the vortexed air flows along the first inner wall surface 36, the swirl is restricted by hitting the air blowing guide 40, and is provided on both sides in the width direction by flowing along the air blowing guide 40. They are respectively guided to the foot blowing ports 32a and 32b.

  Specifically, when the warm air that has passed through the heater core 18 and has risen up the fourth passage 56 flows on the rear side of the vehicle (in the direction of arrow B) from the blowing guide 40, it is disposed above the foot blowing ports 32a and 32b. It turns clockwise by hitting the second inner wall surface 38, and flows toward the first inner wall surface 36 that is the front side of the vehicle (in the direction of arrow A) with respect to the foot air vents 32a and 32b. And this warm air is forced on the air guide 40 provided on the first inner wall surface 36 and projecting toward the foot air vents 32a, 32b from above, so that the air guide 40 extends in the extending direction (width). Direction) to the foot blowing ports 32a and 32b.

  On the other hand, the warm air that has risen from the lower side of the air blowing guide 40 strikes the air blowing guide 40 from below, and the foot air blowing port 32a is forced along the extending direction (width direction) of the air blowing guide 40. It is led to the 32b side.

  As described above, in the present embodiment, in the full-center type vehicle air conditioner 10 in which the blower 14 is provided at the substantially center in the width direction of the air conditioning case 12, the air conditioning case 12 that is substantially orthogonal to the ventilation surface 18 a of the heater core 18. The side walls 22a and 24a along the width direction have foot air vents 32a and 32b for blowing air to the vicinity of the feet of the passengers in the passenger compartment, and pass through the heater core 18 so as to face the foot air vents 32a and 32b. The air flow guide 40 is provided to deflect the air that has been deflected and guide it toward the foot air vents 32a and 32b.

  Thereby, when the warm air heated by the heater core 18 hits the air blowing guide 40, the air blowing direction can be surely deflected toward the foot air blowing ports 32a and 32b and smoothly guided to the duct 34. It can suppress that a warm air turns into a vortex in the vicinity of the said foot ventilation port 32a, 32b. As a result, the occurrence of backflow in the vicinity of the foot vents 32a and 32b is prevented, and the blowing resistance when blowing warm air into the passenger compartment is reduced, so that the amount of blowing can be increased. .

  As a result, the blowing efficiency can be improved without increasing the driving load of the blower 14.

  The air blowing guide 40 extends along the width direction (arrow C direction) so as to extend from the foot air blowing port 32a of the first divided case 22 constituting the air conditioning case 12 to the foot air blowing port 32b of the second divided case 24. Since it is provided in the entire area, it is possible to suppress the warm air flowing in the vicinity of the foot blowing ports 32a and 32b from becoming a vortex flow in the entire width direction, and to prevent the occurrence of backflow in the entire width direction. The blowing resistance due to the backflow can be reliably reduced.

  Furthermore, the air guide 40 is substantially perpendicular to the divided surfaces 12a of the first and second divided cases 22 and 24 and the opening surfaces of the foot air ports 32a and 32b, respectively, and the flow of the warm air that has passed through the heater core 18 is obtained. Since it is formed in a plate shape protruding from the first inner wall surface 36 so as to prevent it, the first and second divided cases 22, while satisfying a guide function for guiding the warm air to the side of the foot blowing ports 32a, 32b, 24 can be integrally formed when molding, and its manufacture is easy.

  Furthermore, in the full center type vehicle air conditioner 10 in which the blower 14 is provided at the same position in the vehicle width direction as the evaporator 16 and the heater core 18 and on the vehicle rear side (arrow B direction), the foot blower openings 32a and 32b. By providing the air blowing guide 40 so as to face, it is more preferable when hot air is blown from the foot air blowing ports 32a, 32b opened in the side walls 22a, 24a along the width direction of the air conditioning case 12.

  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 12 ... Air conditioning case 14 ... Air blower 16 ... Evaporator 18 ... Heater core 20 ... Damper mechanism 22 ... 1st division | segmentation case 24 ... 2nd division | segmentation case 32a, 32b ... Foot ventilation opening 34 ... Duct 36 ... 1st inside Wall surface 38 ... Second inner wall surface 40 ... Air blow guide 52 ... Air mix damper

Claims (5)

An air conditioning case having a flow path for air, a blower that is provided inside the air conditioning case and blows the air into the passenger compartment, and a heat exchange that is provided inside the air conditioning case and performs heat exchange of the air In a vehicle air conditioner having a container,
The air conditioning case has an opening on a side surface of the case orthogonal to the ventilation surface of the heat exchanger disposed in the flow path,
Facing the opening, standing from the inner wall surface of the air conditioning case, extending in a direction substantially orthogonal to the opening surface of the opening, and deflecting the air that has passed through the heat exchanger, the opening A vehicle air conditioner characterized in that a guide portion is provided for guiding to the side. The vehicle air conditioner according to claim 1,
The vehicle air conditioner is characterized in that the guide portion is provided in the vicinity of the opening. The vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner is characterized in that the guide portion is provided in the entire width direction of the flow path. In the vehicle air conditioner according to any one of claims 1 to 3,
The air conditioning case is dividable formed by dividing plane in the width direction substantially central in the flow path, the guide portion extends in a direction substantially perpendicular to the dividing plane of the front Symbol air conditioning case, the heat exchanger vehicle air conditioner, which is a plate-like member erected so as to prevent blowing passing through the vessel. In the vehicle air conditioner according to any one of claims 1 to 4,
The blower is disposed at the same position in the vehicle width direction as the heat exchanger and at the rear of the vehicle from the heat exchanger, and the opening is a heat opening that guides air flow to the feet of the passengers in the passenger compartment. A vehicle air conditioner.

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