WO2015194437A1

WO2015194437A1 - Air conditioning device for vehicle

Info

Publication number: WO2015194437A1
Application number: PCT/JP2015/066762
Authority: WO
Inventors: 生沼利幸; 江川翔
Original assignee: 株式会社ケーヒン
Priority date: 2014-06-19
Filing date: 2015-06-10
Publication date: 2015-12-23
Also published as: JP2016002949A; CN106457966B; CN106457966A

Abstract

An air conditioning device (10) for a vehicle is configured in such a manner that: an evaporator (16) and a heater core (18) are arranged within an air conditioning case (12) so as to be tilted and substantially parallel to each other; and the heater core (18) is provided above the evaporator (16) in the gravitational direction. A second passage (46) located between the evaporator (16) and the heater core (18) is formed so that the bottom surface (46a) of the second passage (46) connects the lower end (44a) of a first heat exchanger (44) for the evaporator (16) and the lower end (58a) of a second heat exchanger (58) for the heater core (18). Consequently, air which flows through the second passage (46) is smoothly conducted to the heater core (18) side along the bottom surface (46a).

Description

Vehicle air conditioner

The present invention relates to a vehicle air conditioner that is mounted on a vehicle and blows air whose temperature has been adjusted by a heat exchanger into a vehicle compartment to adjust the temperature of the vehicle compartment.

Conventionally, as disclosed in JP 2011-57129 A, for example, a vehicle air conditioner mounted on a vehicle takes in inside and outside air with an air blower into an air conditioning case having an air passage, and is a cooling means. After the air cooled by the evaporator and the air heated by the heater core which is the heating means are mixed at a desired mixing ratio in the air conditioning case by driving the air mix door, for example, provided in the air conditioning case The temperature is adjusted by blowing air into the vehicle compartment through the air ducts from the plurality of openings.

In the above-described evaporator, when the air passes through the heat exchange section in which the refrigerant circulates, the water contained in the air adheres as condensed water, so the above-mentioned evaporator may be attached to the heater core disposed downstream. A protruding plate is provided to prevent movement of the condensed water to the heater core side. The projecting plate is erected at a predetermined height vertically upward from the bottom wall of the air conditioning case, so that the condensed water is prevented from moving toward the heater core disposed on the downstream side of the evaporator by air flow or the like. doing. In addition, the projecting plate also functions as a seating portion on which an upper end portion of the air mixing door which mixes hot air and cold air is seated.

However, the projecting plate of the vehicle air conditioner described above is erected so as to be substantially orthogonal to the blowing direction of the air flowing from the evaporator to the heater core, and extends to nearly half the height dimension of the evaporator. Therefore, the air flow resistance when the air flows will be increased.

In addition, since the projecting plate also serves as a seat portion on which the air mix door is seated, when the cantilevered plate-like door having the rotation shaft at one end is formed, the air mix door is miniaturized, Since it is necessary to raise the upper end of the projecting plate, which is the seating portion, by a certain amount, the air flow resistance is further increased.

A general object of the present invention is to provide a vehicle air conditioner capable of reducing the air flow resistance and improving the heat exchange efficiency while preventing the condensed water of the evaporator from moving to the heater core side. is there.

The present invention relates to a vehicle air conditioner having an air conditioning case having a flow path through which air flows, an evaporator provided inside the air conditioning case for cooling the air, and a heater core for heating the air,
In the air conditioning case, the lower end of the heat exchange portion of the heater core is located above the lower end of the heat exchange portion of the evaporator in the direction of gravity, and the evaporator and the heater core are arranged to be substantially parallel to each other.
A guide surface is provided which linearly connects the lower end of the heat exchange unit in the evaporator and the lower end of the heat exchange unit in the heater core.

According to the present invention, the evaporator and the heater core are disposed substantially in parallel and inclined to each other in the air conditioning case of the vehicle air conditioner, and the lower end of the heat exchange portion of the heater core is above the lower end of the heat exchange portion of the evaporator in the gravity direction The lower end of the heat exchange portion in the evaporator and the lower end of the heat exchange portion in the heater core are linearly connected by the guide surface.

Therefore, by disposing the lower end of the heat exchange portion of the heater core upward in the direction of gravity with respect to the lower end of the heat exchange portion of the evaporator, the condensed water attached to the evaporator is reliably prevented from moving to the heater core side. The air having passed through the heat exchange section of the evaporator can be smoothly circulated along the guide surface to the heat exchange section of the heater core. As a result, compared with the vehicle air conditioner according to the related art in which the projecting plate provided perpendicular to the air blowing direction is provided between the evaporator and the heater core, the air blowing resistance can be significantly reduced, and the heat of the heater core can be reduced. Exchange efficiency can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is whole sectional drawing of the vehicle air conditioner which concerns on embodiment of this invention. It is an expanded sectional view of the air mix damper vicinity in the vehicle air conditioner of FIG. It is an expanded sectional view which shows the state which the air mix damper of FIG. 2 moved to the air blower side.

As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioning case 12 constituting air passages, a blower 14 disposed inside the air conditioning case 12, and an evaporator 16 for cooling the air. The heater core 18 heats the air, and the damper mechanism 20 switches the flow of the air flowing in the respective passages. In the following description, the left side (arrow A direction) of the vehicle air conditioner 10 shown in FIG. 1 will be referred to as the front side of the vehicle, and the right side (arrow B direction) will be described as the rear side of the vehicle.

The air conditioning case 12 includes, for example, substantially symmetrical first and second divided

cases

22 and 24 and a lower case 26 mounted below the first and second divided

cases

22 and 24. The first and second divided

cases

22 and 24 can be divided in the width direction orthogonal to the longitudinal direction of the vehicle (directions of arrows A and B in FIG. 1), while the lower case 26 is a first divided case. 22 and the second divided case 24 are provided.

Further, as shown in FIG. 1, a vent air outlet 28 for blowing air near the occupant's face (in the direction of arrow C1) above the air conditioning case 12 and a front window of the vehicle adjacent to the vent air outlet 28. A defroster vent 30 for blowing air in the vicinity is open. The vent vent 28 is formed adjacent to the vehicle rear side (arrow B direction) and the defroster vent 30 is on the vehicle front side (arrow A).

On the other hand, the blower 14 is accommodated in the air conditioning case 12 at a position on the upper side (arrow C1 direction) and on the rear side of the vehicle (arrow B direction).

The blower 14 is provided at, for example, a substantially central portion 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 comprising a motor etc. 32 and a fan 34 having a plurality of fins on the circumferential surface and connected to the drive shaft of the drive source 32.

A spiral air passage 36 is formed in the air conditioning case 12 so as to surround the outer peripheral side of the air blower 14, and the air passage 36 is viewed clockwise from the lower side of the air blower 14 as viewed from the first divided case 22 side. It is formed and extends toward the vehicle front side (arrow A direction) while the passage sectional area gradually increases.

A first passage 38 is formed in the lower case 26 below the air passage 36 (in the direction of arrow C2), and the first passage 38 is gradually inclined downward toward the vehicle front side (the direction of arrow A). And is formed upstream of the evaporator 16. Then, after the air taken in from the outside is circulated in a spiral along the air passage 36 under the driving action of the blower 14, the air is taken to the first passage 38 formed on the lower side of the air conditioning case 12 (arrow C2 direction). It flows and is supplied to the evaporator 16.

The evaporator 16 is provided, for example, between a pair of first and

second tanks

40 and 42 arranged in parallel and supplied / discharged with a refrigerant, the first tank 40 and the second tank 42, and a plurality of evaporators 16 And a first heat exchange unit (heat exchange unit) 44 including the tubes, and the first and

second tanks

40 and 42 are connected to both ends of the plurality of tubes.

Then, the evaporator 16 is inclined at a predetermined angle so that the first tank 40 at the upper end thereof is at the vehicle rear side (arrow B direction) and the second tank 42 at the lower end is on the vehicle front side (arrow A). And the first tank 40 is disposed below the blower 14 (in the direction of the arrow C2).

In the evaporator 16, the refrigerant circulates from the first tank 40 to the second tank 42 through the plurality of tubes in the first heat exchange unit 44, and the fins provided between the tubes in the first heat exchange unit 44 By passing the air from the one passage 38, heat exchange between the air and the refrigerant is performed, and the cooled air is supplied to the downstream side (the second passage 46 side) of the evaporator 16.

Further, as shown in FIGS. 1 and 2, the air conditioning case 12 is provided with a second passage 46 on the downstream side of the evaporator 16, and an air mix damper 48 that constitutes the damper mechanism 20 is provided in the second passage 46. A heater core 18 is provided on the downstream side of the second passage 46 at the vehicle front side (the direction of the arrow A).

The second passage 46 communicates with the third passage 50 extending to the vent air outlet 28 on the vehicle rear side (the direction of the arrow B), and the second passage 46 and the heater core 18 or the third passage 50 communicate with each other. Is switched by the air mix damper 48.

Further, the second passage 46 is formed such that a bottom surface (guide surface) 46a on the lower side (direction of arrow C2) is inclined upward from the evaporator 16 side to the heater core 18 side, and is planar Is formed. That is, the bottom surface 46 a of the second passage 46 is formed in a straight line inclined at a predetermined angle such that one end on the evaporator 16 side is downward and the other end on the heater core 18 is upward. In other words, the bottom surface 46 a of the second passage 46 extends substantially orthogonal to the height direction of the evaporator 16.

One end of the bottom surface 46 a is formed to be substantially flush with the boundary between the second tank 42 of the evaporator 16 and the first heat exchange unit 44, that is, the lower end 44 a of the first heat exchange unit 44. .

On the other hand, as shown in FIG. 1, the third passage 50 is formed at a position on the vehicle front side (direction of arrow A) with respect to the blower 14 and moves upward (direction of arrow C1) toward the vent air outlet 28. And extend substantially in a straight line.

The heater core 18 is provided, for example, between a pair of third and

fourth tanks

54 and 56 arranged in parallel and supplied / discharged with hot water, the third tank 54 and the fourth tank 56, And a second heat exchange unit (heat exchange unit) 58 including the tubes, and both ends of the plurality of tubes are connected to the third and

fourth tanks

54 and 56, respectively.

The heater core 18 is inclined at a predetermined angle so that the third tank 54 at the upper end thereof is the vehicle rear side (arrow B direction) and the fourth tank 56 at the lower end is the vehicle front side (arrow A). Are disposed substantially in parallel with the evaporator 16 with the second passage 46 interposed therebetween.

In the heater core 18, warm water is circulated from the third tank 54 to the fourth tank 56 through the plurality of tubes in the second heat exchange section 58, and air from the second passage 46 is supplied to the fins provided between the tubes. As a result, heat exchange between the air and the hot water is performed, and the heated air is supplied to the fourth passage 52 formed on the downstream side of the heater core 18. That is, in the heater core 18, heat is exchanged by the air passing through the second heat exchange unit 58.

The fourth tank 56 of the heater core 18 is formed so that the boundary (lower end 58a) with the second heat exchange section 58 is substantially flush with the bottom surface 46a of the second passage 46, and the other bottom surface 46a. It is arranged adjacent to the end. In other words, the lower end 58a of the second heat exchanging portion 58 of the heater core 18 and the bottom surface 46a of the second passage 46 are formed to be substantially flush with each other.

That is, the bottom surface 46 a of the second passage 46 is formed so as to be substantially orthogonal to the evaporator 16 and the heater core 18 which are disposed at an angle. In other words, the angle between the evaporator 16 and the heater core 18 and the bottom surface 46a is about 90 °.

Further, as shown in FIG. 1, the inclination angle θ of the evaporator 16 and the heater core 18 described above is set to be within the range of about 15 ° to 55 ° with respect to the imaginary horizontal plane S. The inclination angle θ is, for example, the lower end of the evaporator 16 (the lower end of the first heat exchange unit 44 even when the vehicle equipped with the vehicle air conditioner 10 including the evaporator 16 and the heater core 18 inclines on a steep slope). The lower end of the heater core 18 (the lower end 58a of the second heat exchange section 58) does not become lower than in the direction of gravity than in 44a), and the heater core 18 is always above the evaporator 16 in the direction of gravity (arrow C1 direction) It is preset by such an angle that it becomes.

The bottom surface 46 a of the second passage 46 is formed in a plane that linearly connects the lower end 44 a of the first heat exchange unit 44 in the evaporator 16 and the lower end 58 a of the second heat exchange unit 58 in the heater core 18. For example, it may be integrally formed with the air conditioning case 12, or another member may be provided to the air conditioning case 12.

The damper mechanism 20 includes an air mix damper 48 provided between the evaporator 16 and the heater core 18, a first switching damper 60 for switching the air blowing state of the vent air outlet 28 and the defroster air outlet 30, a third passage 50 and a fourth It has the 2nd switching damper 62 provided between the channel | path 52 and switching the ventilation state of the defroster ventilation port 30 and a foot ventilation port.

The air mix damper 48 is formed, for example, in the shape of a curved plate and is provided along the width direction of the air conditioning case 12, and guide means (not shown) provided on the inner wall surface of the air conditioning case 12 at both sides thereof. Slide along. A rack gear 64 is provided on the inner wall surface of the air mix damper 48 along the sliding direction of the air mix damper 48, and the pinion gear of the shaft 66 axially supported by the air conditioning case 12 is engaged.

Further,

seal members

68 a and 68 b are provided at both end portions along the moving direction of the air mix damper 48.

The air mix damper 48 is slid and displaced in a substantially horizontal direction along the guide means by the rotation of the shaft 66 under the action of an actuator (not shown), and the air mix damper 48 faces the heater core 18 in the second passage 46 (see FIG. 2). It is provided so as to be movable from the reference) to a position facing the third passage 50 (see FIG. 3). Then, by moving the air mix damper 48, the mixing ratio of the air (cold air) cooled by the evaporator 16 and the air (warm air) heated by the heater core 18 is adjusted and the air is blown downstream.

Further, when the air mix damper 48 is moved to a position facing the heater core 18, the seal member 68 a provided at the end thereof is sealed by coming into contact with the bottom surface 46 a of the second passage 46. The seal member 68 b is sealed by coming into contact with the inner wall surface of the air conditioning case 12 when it moves to the position facing the rear surface.

The first switching damper 60 is pivotally supported between the vent air outlet 28 and the defroster air outlet 30, and is rotated about a shaft portion by a predetermined angle under the action of an actuator (not shown), whereby the third passage 50 is formed. And the vent air outlet 28 and the defroster air outlet 30 are switched.

The second switching damper 62 is formed in a fan shape in cross section, and the shaft portion is axially supported with respect to the first and second divided

cases

22 and 24, respectively. By rotating only, the communication state between the fourth passage 52, the third passage 50, and the foot air outlet (not shown) is switched.

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

First, the case of performing the cooling operation to lower the room temperature in the vehicle compartment will be described. When a passenger (not shown) operates the operation lever in the vehicle compartment to select the cooling operation, an actuator (not shown) is driven according to the operation of the operation lever to cause the air mix damper 48 to guide the vehicle in front of the vehicle. It slides to the side (the direction of arrow A) by a predetermined distance, and the seal member 68a abuts on the bottom surface 46a. As a result, as shown in FIG. 1, the second passage 46 and the third passage 50 communicate with each other in the air conditioning case 12, and the communication between the second passage 46 and the heater core 18 is cut off.

At the same time, the blower 14 is driven based on a control signal from a controller (not shown) so that air is sucked into the air conditioning case 12 through the inlet (not shown) and the air swirls along the air passage 36. After flowing downward, heat is exchanged by passing through the evaporator 16 and cooled to a predetermined temperature.

Then, after the cooled air circulates upward from the second passage 46 to the third passage 50, the vented air vent 28 opened under the switching action of the first switching damper 60 enters the vehicle compartment. Supplied.

Next, the case where the heating operation for raising the room temperature in the vehicle compartment is selected and the warm air is blown to the vehicle compartment will be described.

First, by operating the operation lever (not shown) to select the heating operation, the air mix damper 48 slides toward the rear side of the vehicle (the direction of arrow B) by a predetermined distance, and the seal member 68 b contacts the inner wall surface of the air conditioning case 12. By being in contact with each other, the communication between the second passage 46 and the third passage 50 is blocked.

Then, the air blown from the blower 14 is cooled by passing through the first heat exchange section 44 of the evaporator 16, and then flows to the heater core 18 side through the second passage 46. At this time, the bottom surface 46 a of the second passage 46 is provided in a planar shape so as to connect the lower end 44 a of the first heat exchange unit 44 in the evaporator 16 and the lower end 58 a of the second heat exchange unit 58 in the heater core 18. Air can be smoothly flowed to the heater core 18 side on the downstream side in the second passage 46.

In the evaporator 16, water contained in the air may be cooled when it passes through the first heat exchange unit 44 and may be attached as condensed water, and the condensed water may be attached to the first heat exchange under the action of gravity. After moving to the second tank 42 side along the portion 44, the air falls into the air conditioning case 12. Under the present circumstances, since the heater core 18 is arrange | positioned with respect to the evaporator 16 at the gravity direction upper direction (arrow C 1 direction), it is prevented that condensed water moves to the said heater core 18 side.

Then, the air flowing through the second passage 46 is heated to a predetermined temperature by passing through the second heat exchange portion 58 of the heater core 18 and flows upward through the fourth passage 52, and then a car from a foot air outlet etc. It is blown into the room.

As described above, in the present embodiment, the evaporator 16 and the heater core 18 are disposed substantially in parallel and inclined to each other in the air conditioning case 12 constituting the vehicle air conditioner 10, and the second heat exchange in the heater core 18 is performed. A lower end 58a of the portion 58 is provided above the lower end 44a of the first heat exchanging portion 44 of the evaporator 16 in the direction of gravity (in the direction of the arrow C1). Further, the bottom surface 46 a of the second passage 46 connecting the evaporator 16 and the heater core 18 is constituted by the lower end 44 a of the first heat exchanging portion 44 in the evaporator 16 and the lower end 58 a of the second heat exchanging portion 58 in the heater core 18. It is formed in a straight line to be connected.

As a result, by arranging the heater core 18 above (in the direction of the arrow C1) along the gravity direction with respect to the evaporator 16, the condensed water attached to the evaporator 16 is moved to the heater core 18 side. Is prevented. Further, with the air mix damper 48 moved to the third passage 50 side (see FIG. 3), the air having passed through the first heat exchanging portion 44 of the evaporator 16 is made along the bottom surface 46 a of the second passage 46. It can be made to distribute | circulate smoothly to the 18th 2nd heat exchange part 58 side.

Therefore, compared with the vehicle air conditioner according to the prior art in which the projecting plate perpendicular to the blowing direction is provided between the evaporator 16 and the heater core 18, the blowing resistance of the air can be significantly reduced, Accordingly, the heat exchange efficiency of the heater core 18 can be improved by enabling the air to pass uniformly to the second heat exchange unit 58.

In addition, by making the air mix damper 48 provided between the evaporator 16 and the heater core 18 slide, even when the opening of the heater core 18 facing the second passage 46 is largely secured, the conventional plate-like damper can be used. Unlike the adopted vehicle air conditioner, the seat portion can be used as the bottom surface 46 a of the second passage 46 by appropriately setting the moving amount of the air mix damper 48. Therefore, by raising the seat portion, the air flow resistance can be smoothly distributed without increasing the air flow resistance, as compared with the vehicle air conditioner according to the related art in which the air flow resistance is increased.

Further, by using the slide type air mix damper 48, there is no need to secure a pivoting space which is required when the plate-like damper is pivoted about the rotary shaft, so the evaporator 16 and the heater core 18 are used. It is possible to reduce the separation distance between As a result, space saving in the air conditioning case 12 can be achieved, and the vehicle air conditioner 10 can be miniaturized.

Furthermore, the seal member 68 a of the air mix damper 48 is provided so as to protrude toward the bottom surface 46 a of the second passage 46. Thus, when the air mix damper 48 is slid to block the communication of the second passage 46, the seal member 68a can be reliably abutted against the bottom surface 46a, and the seal member 68a abuts. Since it is not necessary to make the second passage 46 side protrude, it is preferable without increasing the air flow resistance of the air flowing through the second passage 46.

Furthermore, by arranging the evaporator 16 and the heater core 18 at an angle of about 15 ° to 55 ° with respect to the imaginary horizontal plane S, for example, the vehicle air conditioner 10 including the evaporator 16 and the heater core 18 Even when the mounted vehicle is inclined on a steep slope or the like, the evaporator 16 and the heater core 18 do not become substantially parallel, and the heater core 18 is always above the evaporator 16 in the gravity direction (arrow C1 direction) Will be placed. Therefore, even when the vehicle is inclined on a slope or the like, the condensed water adhering to the evaporator 16 is prevented from moving to the heater core 18 side.

The vehicle air conditioner according to the present invention is, of course, not limited to the above embodiment, and various configurations can be adopted without departing from the scope of the present invention.

Claims

There is an air conditioning case (12) having a flow path through which air flows, an evaporator (16) provided inside the air conditioning case (12) for cooling the air, and a heater core (18) for heating the air. In the vehicle air conditioner,
In the air conditioning case (12), the heat exchange lower end (58a) of the heater core (18) is disposed above the heat exchange lower end (44a) of the evaporator (16) in the gravity direction, and The evaporator (16) and the heater core (18) are arranged in an inclined manner so as to be substantially parallel to each other,
A vehicle air conditioner comprising a guide surface (46a) linearly connecting a heat exchange lower end (44a) of the evaporator (16) and a heat exchange lower end (58a) of the heater core (18). .
In the vehicle air conditioner according to claim 1,
Between the evaporator (16) and the heater core (18), a slide damper (48) capable of blocking communication between the evaporator (16) and the heater core (18) by sliding displacement is disposed. A vehicle air conditioner characterized by
In the vehicle air conditioner according to claim 2,
A vehicle air conditioner characterized in that the seal portion (68a) of the slide damper (48) abuts on the guide surface (46a) when blocking communication between the evaporator (16) and the heater core (18). apparatus.
The vehicle air conditioner according to any one of claims 1 to 3.
The evaporator (16) and the heater core (18) are inclined to be within a range of 15 ° to 55 ° with respect to the horizontal surface (S) in a state where the vehicle air conditioner (10) is mounted on a vehicle A vehicle air conditioner characterized by being disposed.