JP2020132079A - Air conditioner for vehicle - Google Patents

Abstract

To make air circulate more smoothly by reducing circulation resistance in a case of an air conditioner for a vehicle.SOLUTION: In an air-conditioning case 14 composed of first and second case parts 22, 24 which can be split in a width direction, a split rib 36 for vertically splitting a hot wind passage 52 is arranged between an evaporator 16 and a heating unit 18, and the split rib 36 comprises a column part 38 inserted with a screw member 46 arranged at an upstream side, and fastening the first case part 22 and the second case part 24, a throttle part 40 extending to a downstream side with respect to the column part 38, and formed to be thin in thickness in a vertical direction with respect to the column part 38, and one set of first and second salient parts 42, 44 which are salient in the vertical direction with respect to an upper face and a lower face of the throttle part 40, and abutting on seal members 74a, 74b of first and second air mix doors 58, 60. Then, heights of the first and second salient parts 42, 44 are formed to be positioned inside a tangent line L between a tip part 40a of the throttle part 40 and an external peripheral part of the column part 38.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle air conditioner that is mounted on a vehicle and whose temperature is adjusted by a heat exchanger in an air conditioner case to be blown into the vehicle interior to adjust the temperature inside the vehicle interior.

The applicant has proposed a vehicle air conditioner provided with a set of first and second air mix doors operating in the vertical direction on the downstream side of the evaporator which is a cooler in the air conditioner case (Patent Document 1). reference). In this vehicle air conditioner, seal members are provided at both ends of the first and second air mix doors along the sliding direction, and the seal members are brought into contact with and compressed at substantially the center of the air conditioner case. A split rib is provided.

The split rib has a pillar portion through which a screw member for connecting the air conditioning cases divided in the width direction is inserted, and the split rib in one of the divided air conditioning cases and the split rib in the other air conditioning case. Is fastened in the width direction by the screw member in a state of being in contact with the screw member.

The pillar portion of the split rib is formed in an elliptical cross section when viewed from the split direction of the air conditioning case in order to insert a screw member into the pillar portion, and the first air mix door and the second air mix door are formed on each other. It operates up and down so as to be separated from each other, and when the evaporator and the heater core communicate with each other, the split ribs serve as a flow path resistance because they are on the flow path.

JP-A-2018-39397

The present invention has been made in connection with the above proposal, and an object of the present invention is to provide an air conditioner for a vehicle capable of allowing air to flow more smoothly by reducing the flow path resistance in the case. To do.

In order to achieve the above object, an embodiment of the present invention includes a case in which an air flow path and a cooler and a heater arranged in the flow path are provided and can be divided in the width direction. A partition wall that divides the flow path vertically is provided between the cooler and the heater, and each partitioned flow path is provided with a sliding door that can move in the vertical direction, and a seal is provided at the tip of the sliding door in the moving direction. In a vehicle air conditioner with members
The partition wall is provided on the upstream side, which is the cooler side, and has a pillar portion having a fastening portion for fastening one of the divided cases and the other case.
A throttle portion that is provided on the downstream side that is the heater side with respect to the pillar portion, has a small vertical thickness with respect to the pillar portion, and extends toward the downstream side.
A set of protrusions that project vertically with respect to the throttle and come into contact with the seal member of the sliding door.
With
The height of the protruding portion is set so as to be inside the tangent line in contact with the downstream end portion of the throttle portion and the outer peripheral portion of the pillar portion.

According to the present invention, in the case where the partition wall is formed so as to be divisible in the width direction and the flow path is vertically partitioned between the cooler and the heater provided inside, the partition wall is a cooler. A pillar portion having a fastening portion for fastening one case and the other case provided on the side and a pillar portion provided on the heater side with respect to the pillar portion and having a small vertical thickness with respect to the pillar portion. It includes a narrowing portion that is formed and extends toward the downstream side, and a set of protruding portions that project vertically with respect to the narrowing portion and come into contact with the seal member of the slide door. The height of the protruding portion is formed to be inside the tangent line in contact with the downstream end portion of the throttle portion and the outer peripheral portion of the pillar portion.

As a result, in the partition wall, the height of the protruding portion is suppressed so as to be within the tangent line in contact with the outer peripheral portion of the pillar portion and the downstream end portion of the throttle portion, so that the air flowing from the cooler side to the heater side Since the protruding portion preferably enters the downstream side of the pillar portion in the blowing direction of the air, it is possible to prevent the air flow from directly hitting the protruding portion.

As a result, the flow of air flowing from the cooler to the heater side is suppressed from being separated from the flow and generating noise due to direct contact with the protruding portion, so that the air flow resistance in the vicinity of the partition wall in the case is suppressed. Is reduced, and air can be smoothly circulated to the downstream side.

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

That is, in the case that can be divided in the width direction, the partition wall provided between the cooler and the heater and partitioning the flow path vertically is a pillar portion provided on the cooler side and having a fastening portion for fastening the cases to each other. Then, the squeezing portion provided on the heater side with respect to the pillar portion and having a thickness smaller in the vertical direction with respect to the pillar portion and the squeezing portion projecting in the vertical direction with respect to the squeezing portion and the seal member of the slide door comes into contact with each other. A set of protrusions is provided, and the protrusions are formed so as to be inside the tangent line in contact with the downstream end of the drawing portion and the outer peripheral portion of the pillar portion, so that the protrusions are formed from the cooler side to the heater side. Since the projecting portion can be preferably arranged so as to be hidden on the downstream side of the pillar portion in the blowing direction of the air flowing to, it is possible to suppress the air flow from directly hitting the projecting portion.

As a result, the flow of air flowing from the cooler to the heater side directly hits the protruding part, which suppresses the separation of the flow and the generation of noise, and reduces the air flow resistance near the partition wall in the case. By doing so, air can be smoothly circulated to the downstream side.

FIG. 1A is an overall cross-sectional view of the vehicle air conditioner according to the embodiment of the present invention, and FIG. 1B is an enlarged cross-sectional view showing the vicinity of the split rib in the vehicle air conditioner of FIG. 1A.

A preferred embodiment of the vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings. In FIG. 1A, reference numeral 10 indicates a vehicle air conditioner according to an embodiment of the present invention.

As shown in FIG. 1A, the vehicle air conditioner 10 includes an air conditioner case (case) 14 constituting each air passage 12 and an evaporator (cooler) arranged inside the air conditioner case 14 to cool the air. ) 16, a heating unit (heater) 18 for heating air, and a door mechanism 20 for switching the flow of air flowing through each passage 12.

The air conditioning case 14 includes first and second case portions 22 and 24 that can be divided in a width direction orthogonal to the front-rear direction (arrows A and B directions) of the vehicle, and above the first and second case portions 22 and 24 (in the direction of arrow C1), the vehicle. A vent blower port 26 that blows air near the face of the occupant in the room and a defroster blower port 28 that blows air near the front window of the vehicle adjacent to the vent blower port 26 are open. The defroster blower port 28 is formed adjacent to the vehicle front side (arrow A direction), and the vent blower port 26 is formed adjacent to the vehicle rear side (arrow B direction).

Further, on the wall portion on the rear side (arrow B direction) of the air conditioning case 14, the width direction wall portions of the first and second case portions 22 and 24 orthogonal to the front-rear direction of the vehicle are on the wall portion in the width direction of the passenger interior. Heat blower ports 30 for blowing air are formed in the vicinity of the feet.

On the other hand, inside the air conditioning case 14, an evaporator 16 is provided at a position on the upstream side (arrow A direction) in the air flow direction, and is predetermined at a position on the downstream side (arrow B direction) with respect to the evaporator 16. The heating units 18 are provided at intervals.

The heating unit 18 includes, for example, a heater core 32 that heats air by circulating hot water inside, and an electric heater 34 that is provided on the downstream side (direction of arrow B) of the heater core 32 and generates heat under an energizing action. The electric heater 34 is provided on the downstream side of the heater core 32.

Further, as shown in FIGS. 1A and 1B, a dividing rib (partition wall) 36 is provided between the evaporator 16 and the heater core 32 inside the air conditioning case 14, and the dividing rib 36 is described later, for example. Between the first air mix door 58 and the second air mix door 60 of the door mechanism 20 to be provided, the heater core 32 is provided in the vicinity of the substantially central portion along the height direction (arrows C1 and C2 directions) and in the width direction. The warm air passage 52, which will be described later, is partitioned in the vertical direction (arrows C1 and C2 directions) by extending along the respective lines.

Further, the split ribs 36 are, for example, a pillar portion 38 provided on the evaporator 16 side (direction of arrow A) and a drawing portion extending toward the heating unit 18 side (direction of arrow B) with respect to the pillar portion 38. 40 and a pair of first and second projecting portions 42, 44 projecting from the throttle portion 40, and the pillar portion 38 is air when viewed from the dividing direction of the air conditioning case 14 shown in FIG. 1A. It is formed in an elliptical cross section so as to be long along the blowing direction (arrow B direction).

A through hole 48 through which a screw member 46 is inserted and screwed is formed in the pillar portion 38, and the first case portion 22 and the second case portion 24 are fastened in the width direction by the screw member 46. That is, the pillar portion 38 functions as a fastening portion for connecting the first case portion 22 and the second case portion 24 to each other.

The throttle portion 40 extends from the end of the pillar portion 38 on the heating unit 18 side (arrow B direction, downstream side), and is formed so as to gradually narrow in the vertical direction toward the heating unit 18 side. The tip portion (downstream side end portion) 40a is in contact with the upstream ventilation surface 32a of the heater core 32 constituting the heating unit 18.

The first and second protrusions 42 and 44 are formed, for example, in a semicircular cross section, and are formed in the vicinity of the central portion along the extending direction of the drawing portion 40, and the first protrusion 42 is the first. It is formed on the upper surface on the air mix door 58 side (arrow C1 direction), and the second protrusion 44 is formed on the lower surface on the second air mix door 60 side (arrow C2 direction) so as to be substantially symmetrical. And downwards protruding at a predetermined height.

Further, as shown in FIG. 1B, the first and second projecting portions 42 and 44 are inside with respect to the tangent line L set to be in contact with the tip portion 40a of the drawing portion 40 and the outer peripheral portion of the pillar portion 38. Each is formed at a height that becomes (throttle portion 40 side). In other words, the first and second projecting portions 42 and 44 are provided so as not to project outward (upward and downward) with respect to the tangent line L and to be closer to the throttle portion 40 than the tangent line L. ing.

Then, when the first air mix door 58 described later is lowered, the seal member 74a abuts and seals the first protruding portion 42, and the second air mix door 60 described later is attached to the second protruding portion 44. When ascended, the sealing member 74b comes into contact with each other and is sealed. That is, the first and second projecting portions 42 and 44 function as sealing portions with which the sealing members 74a and 74b of the first and second air mix doors 58 and 60 abut, respectively.

Further, inside the air conditioning case 14, as shown in FIG. 1A, a cold air passage 50 in which the evaporator 16 is arranged and a hot air passage 52 formed on the downstream side of the cold air passage 50 and in which the heating unit 18 is arranged are arranged. A set of bypass passages 54a and 54b that bypass the heating unit 18 on the downstream side of the cold air passage 50, cold air provided behind the heating unit 18 and flowing through the bypass passages 54a and 54b, and a hot air passage 52. By merging with the warm air flowing through the air, a confluence portion 56 that is temperature-controlled and becomes a temperature-controlled air is formed.

The door mechanism 20 is provided between the evaporator 16 and the heater core 32 to the first air mix door (sliding door) 58 for adjusting the mixing ratio of cold air and hot air, and to the bypass passage 54b on the downstream side of the evaporator 16. The second air mix door (sliding door) 60 that switches the flow state of cold air, the vent switching door 62 that adjusts the air flow state from the vent air outlet 26 to the vehicle interior, and the air flow state from the defroster air port 28 to the front window. The defroster switching door 64 for switching the heat opening and the heat switching door 66 for opening and closing the heat opening are included.

The first and second air mix doors 58 and 60 are meshed with the first and second shafts 68 and 70 rotatably supported by the air conditioning case 14 via the rack gear 72, respectively, and drive means (not shown). By rotating the first and second shafts 68 and 70 by the driving force from the above, the first and second air mix doors 58 and 60 are slidably displaced in the vertical direction (arrows C1 and C2 directions), and the first Seal members 74a and 74b are provided at the upper ends and lower ends of the first and second air mix doors 58 and 60, respectively.

The first air mix door 58 is provided so as to be above the split rib 36 (in the direction of arrow C1), and the distribution ratio of the cold air flowing through the cold air passage 50 to the warm air passage 52 side by sliding in the vertical direction. When sliding upward, the upper end sealing member 74a comes into contact with the inner wall surface of the air conditioning case 14, and when sliding downward, the lower end sealing member 74a comes into contact with the first protruding portion 42 of the split rib 36. It comes into contact with and is sealed.

Further, the second air mix door 60 is provided so as to be below the split rib 36 (in the direction of arrow C2), and by sliding in the vertical direction, the second air mix door 60 becomes a bypass passage 54b below the warm air passage 52 and the heating unit 18. When sliding upward, the upper end sealing member 74b abuts on the second protruding portion 44 of the split rib 36 and is sealed, and when sliding downward, the lower end sealing member is sealed. 74b comes into contact with the inner wall surface of the air conditioning case 14.

The heat switching door 66 switches the blowing state of the temperature-controlled air to the heat blowing port 30 under its rotating action.

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

First, in the vehicle air conditioner 10, when performing a heating operation (heat mode) in which temperature control air is blown to the vicinity of the occupant's feet, the heat switching door 66 is rotated to open the heat air outlet 30 and vent. The vent air vent 26 is fully closed by the switching door 62, the first air mix door 58 is raised, and the second air mix door 60 is lowered.

Then, the cold air supplied from the blower (not shown) into the air conditioning case 14 and passing through the evaporator 16 moves in the vertical direction so that the first and second air mix doors 58 and 60 are separated from each other, so that the heating unit It flows toward the 18 side. At this time, the cold air flowing through the warm air passage 52 on the downstream side of the evaporator 16 is separated in the vertical direction by the split rib 36, and the split rib 36 is downstream of the pillar portion 38 provided on the upstream side. Since the throttle portion 40 whose thickness is gradually narrowed toward the side is provided, it is possible to prevent the flow of cold air hitting the split rib 36 from being separated and disturbed in the vertical direction.

Further, when the cold air flowing along the outer peripheral portion of the pillar portion 38 flows to the tip portion 40a of the throttle portion 40, it flows substantially in a straight line along the tangent line L, so that it is inside the tangent line L. It is suppressed that the first and second protruding portions 42, 44 provided do not directly hit the flow and obstruct the flow, and the separation of cold air in the vertical direction by the first and second protruding portions 42, 44 is suppressed. Will be done.

As a result, the cold air cooled by the evaporator 16 is prevented from causing turbulence in the flow due to the split rib 36, smoothly flows to the heating unit 18 side, and then flows into the heating unit 18. Then, by passing through the heater core 32 and the electric heater 34, the air is heated and becomes warm air, which is distributed to the downstream side.

Then, the cold air bypassing the heating unit 18 through the bypass passages 54a and 54b and the warm air heated through the heating unit 18 merge at the confluence 56 to control the temperature, and the temperature is adjusted from the opened heat air outlet 30. The air is blown near the feet of the occupants in the passenger compartment.

As described above, in the present embodiment, in the air-conditioning case 14 having the first and second case portions 22 and 24 that can be divided in the width direction, the first air is between the evaporator 16 and the heating unit 18. The lower end seal member 74a of the mix door 58 and the upper end seal member 74b of the second air mix door 60 can be brought into contact with each other, and the first case portion 22 and the second case portion 24 are brought into contact with each other in the width direction. A split rib 36 through which the screw member 46 to be fastened is inserted is provided.

The split rib 36 is formed on the pillar portion 38 provided on the evaporator 16 side (direction of arrow A) and through which the screw member 46 is inserted, and on the downstream side (direction of arrow B) of the pillar portion 38 from the pillar portion 38. The first and second projecting portions 42, which are formed to have a thin thickness, and the sealing members 74a and 74b of the first and second air mix doors 58 and 60 projecting from the drawing portion 40 abut. 44 is provided, and the heights of the first and second projecting portions 42, 44 are formed so as to be inside the tangent line L between the pillar portion 38 and the tip end portion 40a of the throttle portion 40.

Therefore, in the split rib 36, the heights of the first and second protrusions 42 and 44 are suppressed so as to be within the tangent line L in contact with the outer peripheral portion of the pillar portion 38 and the tip portion 40a of the narrowing portion 40, so that the evaporator In the direction of blowing air flowing from the 16 side to the heating unit 18 side, the first and second protrusions 42, 44 can be arranged so as to be hidden behind the pillar 38, so that the air flow flows to the pillar 38. After hitting the portion 38 and flowing along the portion 38, it becomes difficult to directly hit the first and second protruding portions 42 and 44.

As a result, when the air flow from the evaporator 16 to the heating unit 18 side directly hits the first and second protrusions 42 and 44, the flow is separated in the vertical direction and noise is generated. Is suppressed, and the air flow resistance in the vicinity of the split rib 36 in the air conditioning case 14 is reduced, so that the air can be smoothly circulated to the downstream side and guided to the heating unit 18 side.

It should be noted that the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without departing from the gist of the present invention.

10 ... Vehicle air conditioner 14 ... Air conditioning case 16 ... Evaporator 18 ... Heating unit 22 ... First case part 24 ... Second case part 36 ... Divided rib 38 ... Pillar part 40 ... Squeezing part 42 ... First protrusion 44 ... First 2 Protruding part 52 ... Warm air passage 58 ... First air mix door 60 ... Second air mix door 74a, 74b ... Seal member

Claims (1)

It has a case in which an air flow path and a cooler and a heater arranged in the flow path are provided and can be divided in the width direction. In the case, the cooler and the heater are separated from each other. In a vehicle air conditioner having a partition wall for partitioning a flow path up and down, each of the partitioned flow paths is provided with a slide door that can move in the vertical direction, and a seal member is provided at the tip of the slide door in the moving direction. ,
The partition wall is provided on the upstream side on the cooler side, and has a pillar portion having a fastening portion for fastening one of the divided cases and the other case.
A throttle portion provided on the downstream side of the pillar portion on the heater side, having a small vertical thickness with respect to the pillar portion, and extending toward the downstream side.
A set of protruding portions that project vertically with respect to the throttle portion and come into contact with the seal member of the sliding door.
With
A vehicle air conditioner in which the height of the protruding portion is set to be inside the tangent line in contact with the downstream end portion of the throttle portion and the outer peripheral portion of the pillar portion.

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