JP2019156115A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve temperature controllability by improving the flow of air flowing into a heater in an air conditioner for a vehicle. SOLUTION: The upstream side of an evaporator 14 has an air conditioning case 12 separated vertically by a first partition plate 38, and a first air mix damper 48 is provided between the evaporator 14 and a heater core 16 and the first air mix damper 48 is provided. 1 A guide wall 40 is provided between the air mix damper 48 and the evaporator 14, so that the guide wall 40 extends along the air flow direction and the downstream side thereof inclines downward. It is formed. As a result, the air that has passed through the evaporator 14 is guided to the lower side of the heater core 16 that has become high pressure by the guide wall 40, so that the bias of the air flowing into the heater core 16 is eliminated, and the air is substantially relative to the heater core 16. It can be distributed evenly. [Selection diagram] Fig. 1

Description

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

  As a vehicle air conditioner capable of adjusting the ventilation rate and temperature from the opening of the air conditioning case as described above, for example, Patent Document 1 is provided with a partition plate that vertically separates the air sent from the blower in the casing. In addition, on the downstream side of the heater core, a partition plate that further separates the upper passage in the vertical direction is provided. And when increasing the air volume of the warm air sent from the foot opening part of a casing to a vehicle interior, it is set as the structure which guides the air between partition plates by the mode door arrange | positioned so that this foot opening part may be faced.

Japanese Patent No. 6201621

  However, in the vehicle air conditioner disclosed in Patent Document 1, since the pressure on the lower side in the casing becomes high, the air that flows through the evaporator and flows into the heater core is biased to flow above the heater core. Therefore, there is a problem that air cannot be evenly distributed to the heater core.

  The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a vehicle air conditioner capable of improving temperature controllability by improving the flow of air flowing into a heater. And

In order to achieve the above object, the present invention includes a casing, a cooler and a heater provided inside the casing, a cold air passage provided between the cooler and the heater, and a heater. An air mix door that is provided between the cooler and the heater, and adjusts the mixing ratio of the cool air and the hot air. In a vehicle air conditioner having
Between the air mix door and the cooler, the guide extends along the air flow direction, and the downstream side is inclined toward the direction away from the first bypass passage side above the heater. It is characterized by providing.

  According to the present invention, in the casing constituting the vehicle air conditioner, it extends along the air flow direction between the air mix door and the cooler, and its downstream side is above the heater. By providing a guide inclined toward the direction away from the first bypass passage side, when the air that has passed through the cooler is supplied to the downstream heater, the first bypass is located above the low-pressure heater. Air can be suitably guided by the guide from the passage side to the lower side of the high-pressure heater.

  As a result, it is possible to eliminate the unevenness of the air flowing in in the height direction of the heater and to distribute the air substantially uniformly to the heater. Temperature controllability can be improved.

  The warm air passage includes a second heater on the downstream side of the heater, and the guide extends from the first bypass passage toward the second heater so that the air that has passed through the heater is passed through. Generally tends to be deflected upward by a second heater provided on the downstream side, but air is preferably guided by being guided downward by a guide provided on the upstream side. And it can distribute | circulate substantially uniformly in the height direction of a 2nd heater, and can make the ventilation to the downstream side uniform in connection with it.

  Further, a hot air passage including an upper and lower partition plate that is divided into an upper passage and a lower passage on the downstream side of the cooler, the heater being disposed across the upper and lower partition plates, and including the upper passage and the lower passage It is good to provide the 2nd air mix door which adjusts the distribution ratio with the 2nd bypass passage which bypasses the lower part of a heater.

  Furthermore, a passage partition plate that further divides the downstream side of the heater in the upper passage is provided, and the air guided by the guide is guided toward the passage between the passage partition plate and the upper and lower partition plates. In addition, by providing the guide, the unevenness of the air flowing into the heater can be eliminated more smoothly.

  Furthermore, the second heater is disposed so as to straddle the upper and lower partition plates, and is disposed below the passage partition plate, so that the second heater is disposed in the passage between the upper and lower partition plates and the passage partition plate. Even when the flow resistance in the passage is increased, it is possible to eliminate the unevenness of the air flowing into the second heater by the guide provided on the upstream side of the heater.

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

  That is, in the casing constituting the vehicle air conditioner, the first bypass passage that extends along the air flow direction between the air mix door and the cooler and whose downstream side is above the heater. By providing the guide inclined toward the direction away from the side, when supplying the air that has passed through the cooler to the downstream heater, from the first bypass passage side above the heater that has become a low pressure, The air can be guided by the guide to the lower side of the high-pressure heater. As a result, it is possible to eliminate the unevenness of the air flowing in in the height direction of the heater and to distribute the air substantially uniformly to the heater, so that the air is blown after the temperature is adjusted by the vehicle air conditioner. It becomes possible to improve the temperature controllability.

1 is a schematic cross-sectional view of a vehicle air conditioner according to a first embodiment of the present invention. It is a schematic structure sectional view of the air-conditioner for vehicles concerning a 2nd embodiment of the present invention. It is a schematic structure sectional view of the air-conditioner for vehicles concerning a 3rd embodiment of the present invention.

  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 a first 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 FIG. 1, the vehicle air conditioner 10 includes an air conditioning case (casing) 12 that constitutes each passage of air, and an evaporator (cooler) that is disposed inside the air conditioning case 12 and cools the air. ) 14, a heater core (heater) 16 that heats the air, and a damper mechanism 18 that switches the flow of air flowing through the passages.

  Above the air conditioning case 12 (in the direction of the arrow C1), a vent blower 20 that blows air near the passenger's face in the passenger compartment, and a defroster blower that blows air near the vent blower 20 and near the front window of the vehicle. 22 is opened, and a first foot blower opening 24 for blowing air in the vicinity of the feet of the passenger is opened on the rear side (in the direction of arrow B) of the air conditioning case 12. In addition, a second foot blower opening 25 communicating with the downstream side of the first foot blower opening 24 is opened above the first foot blower opening 24.

  On the other hand, the evaporator 14 is housed inside the air conditioning case 12 on the front side (arrow A direction), and the heater core 16 is housed on the downstream side of the evaporator 14, that is, on the rear side (arrow B direction). The evaporator 14 is formed at substantially the same height as the air conditioning case 12 along the height direction (arrow C1, C2 direction) of the air conditioning case 12, and the heater core 16 faces, for example, the lower half of the evaporator 14. It is formed with approximately half the height. The lower portions of the evaporator 14 and the heater core 16 are provided so as to be separated from the bottom of the air conditioning case 12.

  Then, air is introduced into the air conditioning case 12 from a blower through a duct (not shown) connected to a position upstream of the evaporator 14, and the air is cooled by passing through the evaporator 14 and passes through the heater core 16. The air is heated.

  A passage in the air conditioning case 12 includes a cool air passage 26 where the evaporator 14 is disposed, a warm air passage 28 which is formed on the downstream side of the cold air passage 26 and where the heater core 16 is disposed, and a downstream side of the cold air passage 26. A pair of first and second bypass passages 30 and 32 that bypass the heater core 16 are included.

  The first bypass passage 30 is provided so as to bypass the upper side of the heater core 16 (in the direction of arrow C1), communicates with the downstream side of the cold air passage 26, and the second bypass passage 32 is below the heater core 16 (in the direction of arrow C2). ) And communicates with the downstream side of the cold air passage 26.

  Furthermore, on the upstream side of the evaporator 14, a first partition plate 38 that separates the air supplied to the air conditioning case 12 into an upper air passage 34 and a lower air passage 36 is provided. It is formed so as to face substantially the center of the evaporator 14 in the height direction, and extends along the air flow direction (arrow B direction). The upper air passage 34 is supplied with air (outside air) taken from the outside of the vehicle, and the lower air passage 36 is supplied with air (inside air) taken from the vehicle interior.

  In other words, the vehicle air conditioner 10 is a two-layer type that can take in outside air and inside air at the same time and supply them into the air conditioning case 12.

  A guide wall (guide) 40 that faces substantially the center in the height direction of the evaporator 14 and is inclined downward (in the direction of arrow C2) downward (in the direction of arrow C2) in the cold air passage 26 on the downstream side of the evaporator 14. And a second partition plate 41 that divides in the vertical direction (arrow C1, C2 direction). That is, the guide wall 40 is formed so that the downstream side thereof is inclined in a direction away from the first bypass passage 30 along the air flow direction. In addition, the 2nd partition plate 41 is formed so that it may become in alignment with the 1st partition plate 38 along the front-back direction (arrow A, B direction) of the vehicle air conditioner 10. FIG.

  Further, on the downstream side of the heater core 16, a third partition plate (passage partition plate) 46 that separates the hot air passage 28 into an upper hot air passage (upper passage) 42 and a lower hot air passage (lower passage) 44. Is provided. The third partition plate 46 extends, for example, from one end facing substantially the center in the height direction of the heater core 16 along the air flow direction (in the direction of arrow B) and then toward the first foot blower port 24 from the middle. It is formed so as to incline downward.

  The damper mechanism 18 includes a first air mix damper 48 provided between the evaporator 14 and the heater core 16 and adjusting a mixing ratio of cold air and hot air, and air to the second bypass passage 32 on the downstream side of the evaporator 14. The second air mix damper 50 for switching the flow state of the air, the vent switching damper 52 for adjusting the air blowing state from the vent air blowing port 20, the defroster switching damper 54 for switching the air blowing state from the defroster air blowing port 22, and the first foot air blowing. The 1st foot switching damper 56 which adjusts the ventilation state to the opening | mouth 24 and the 2nd foot switching damper 57 which adjusts the ventilation state to the 2nd foot ventilation opening 25 are included.

  The first and second air mix dampers 48 and 50 are respectively meshed with the pinion gears 62 of the first and second shafts 58 and 60 supported rotatably with respect to the air conditioning case 12 via the rack gear 64, and are not shown. When the first and second shafts 58 and 60 are rotated by the driving force from the driving means, the first and second air mix dampers 48 and 50 are slid in the vertical direction (arrow C1 and C2 directions).

  The first shaft 58 meshed with the first air mix damper 48 is provided so as to face the vicinity of the upper portion of the heater core 16 and the guide wall 40, and the second shaft 60 meshed with the second air mix damper 50 is It is provided to face the vicinity of the lower part of the heater core 16.

  And the 1st air mix damper 48 adjusts the distribution | circulation ratio to the warm air channel | path 28 side of the cold wind which flows through the cold wind channel | path 26 by sliding up and down, and the 2nd air mix damper 50 slides up and down. Thus, the flow rate of the hot air passage 28 and the second bypass passage 32 below the heater core 16 is adjusted.

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

  When the vehicle air conditioner 10 performs a heating operation and blows warm air near the feet of the occupant, the first air mix damper 48 is slid upward (in the direction of the arrow C1), and the second air mix damper 50 is moved. Is slid downward (in the direction of arrow C2), the upstream side (in the direction of arrow A) of the heater core 16 is opened, and the air, which is outside air and inside air, passes through the upper air passage 34 and the lower air passage 36. 14, passes through the interior, and flows to the cold air passage 26.

  The cold air flowing into the cold air passage 26 is a part of the air that flows upward with respect to the second partition plate 41 and is guided downward (in the direction of the arrow C2) by the guide wall 40, so that the heater core is at a low pressure. Since it can be forced to flow to the lower side of the heater core 16 that is at a high pressure without flowing to the vicinity of the upper portion of the heater 16, the heater core 16 in the height direction (arrow C 1, C 2 direction). The air can be made to flow substantially evenly along the downstream side (arrow B direction).

  Then, the warm air heated through the heater core 16 is guided downward by the third partition plate 46 and then blown from the first foot blower opening 24 to the vicinity of the feet of the occupant.

  As described above, in the first embodiment, in the two-layered vehicle air conditioner 10 in which the upstream side of the evaporator 14 in the air conditioning case 12 is separated into the upper and lower layers by the first partition plate 38, the evaporator 14 and the A first air mix damper 48 is provided between the heater core 16 and a guide wall 40 is provided between the first air mix damper 48 and the evaporator 14. The guide wall 40 is arranged in the direction of air flow. And the downstream side thereof is formed so as to be inclined downward (in the direction of arrow C2).

  Accordingly, when the cold air that has passed through the evaporator 14 is supplied to the heater core 16 on the downstream side, the air flows from the side of the first bypass passage 30 above the heater core 16 at a low pressure to the side below the heater core 16 at a high pressure. Is guided by the guide wall 40, the unevenness of the air flowing in in the height direction of the heater core 16 can be eliminated, and the air can be distributed substantially uniformly to the heater core 16.

  As a result, it is possible to improve the temperature controllability of the blown air by adjusting the temperature in the vehicle air conditioner 10 by allowing the air to flow substantially evenly through the heater core 16.

  Next, a vehicle air conditioner 70 according to a second embodiment is shown in FIG. The same components as those in the vehicle air conditioner 10 according to the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the vehicle air conditioner 70 according to the second embodiment, as shown in FIG. 2, an electric heater (second heater) 72 is provided on the downstream side (in the arrow B direction) of the heater core 16. This is different from the vehicle air conditioner 10 according to the first embodiment.

  The electric heater 72 used in the vehicle air conditioner 70 is formed with a small height with respect to the heater core 16, and is formed so as to be able to heat the air passing through the inside under the energization action. The electric heater 72 is disposed such that the lower end thereof is substantially the same height as the lower end of the heater core 16, the second bypass passage 32 is provided below the electric heater 72, and the upper end is below the third partition plate 46. Are arranged as follows.

  When performing the heating operation in the above-described vehicle air conditioner 70, the warm air that has passed through the heater core 16 is generally deflected upward (in the direction of the arrow C1) by the electric heater 72 provided on the downstream side. Although there is a tendency, by providing the guide wall 40 on the upstream side, the air can be circulated in advance so as to suitably guide it downward. Thereby, air can be distributed substantially uniformly in the height direction from the heater core 16 to the electric heater 72, and accordingly, the air flow to the downstream side can be made uniform, so that the temperature control of the air blown from the vehicle air conditioner 70 is possible. Can be improved.

  Further, in the cold air passage 26, the cold air flowing above the second partition plate 41 is deflected downward (in the direction of the arrow C <b> 2) by the guide wall 40, and is generated between the heater core 16 and the second partition plate 41. The air flowing under the second partition plate 41 from the gap can be prevented from flowing upward.

  Next, a vehicle air conditioner 80 according to a third embodiment is shown in FIG. In addition, the same referential mark is attached | subjected to the component same as the vehicle air conditioners 10 and 70 which concern on 1st and 2nd embodiment mentioned above, and the detailed description is abbreviate | omitted.

  In the vehicle air conditioner 80 according to the third embodiment, the second partition plate 41 is provided so as to straddle the heater core 16 and the electric heater 72, and the upper hot air passage 42 is further provided on the downstream side of the heater core 16. It differs from the vehicle air conditioners 10 and 70 according to the first and second embodiments in that it includes a fourth partition plate (upper and lower partition plate) 82 that is divided in the vertical direction.

  In this vehicle air conditioner 80, as shown in FIG. 3, a part of the cold air passage 26 and the warm air passage 28 is divided into an upper intermediate passage 84 and a lower intermediate passage 86 on the downstream side of the evaporator 14. A partition plate 41 is provided, and the second partition plate 41 has, for example, an upstream end protruding from the heater core 16 toward the cold air passage 26.

  The second partition plate 41 extends approximately along the center of the heater core 16 in the height direction and extends along the air flow direction. The second partition plate 41 straddles the heater core 16 and the electric heater 72, and then the downstream end faces downward. Are formed to be inclined.

  The fourth partition plate 82 is provided on the downstream side of the heater core 16 above the electric heater 72 and substantially parallel to the second partition plate 41 above the second partition plate 41 (in the direction of the arrow C1). Similarly to the partition plate 41, the downstream end thereof is formed to be inclined downward (in the direction of arrow C2).

  And when heating operation is performed in the vehicle air conditioner 80 described above, the warm air that has passed through the heater core 16 generally tends to be deflected upward by the electric heater 72 provided on the downstream side. By providing the guide wall 40 on the upstream side, the air can be preliminarily circulated so as to be suitably guided downward (in the direction of arrow C2), and the second is provided so as to straddle the heater core 16 and the electric heater 72. The partition plate 41 prevents further upward flow and allows the partition plate 41 to circulate downward.

  As a result, the air passing through the evaporator 14 is deflected downward by the guide wall 40, and the upward flow is restricted by the second partition plate 41, whereby the air is increased from the heater core 16 to the electric heater 72. It can distribute | circulate substantially uniformly in the direction, and the further temperature control property of the vehicle air conditioner 80 can be improved by making the ventilation to downstream downstream uniform.

  Further, the air guided by the guide wall 40 provided on the upstream side of the heater core 16 is preferably guided to the passage 88 between the second partition plate 41 and the fourth partition plate 82, so that smoother and smoother. The unevenness of the air flowing into the heater core 16 and the electric heater 72 can be eliminated.

  Furthermore, a fourth partition plate 82 that further divides the downstream side of the heater core 16 in the hot air passage 28 is provided, and the air guided by the guide wall 40 is passed between the second partition plate 41 and the fourth partition plate 82. By guiding toward 88, the guide wall 40 is provided in addition to the fourth partition plate 82, so that the deviation of the air flowing into the heater core 16 can be eliminated more smoothly.

  Furthermore, the electric heater 72 is disposed so as to straddle the second partition plate 41, and is disposed below (in the direction of the arrow C2) the fourth partition plate 82, so that the second partition plate 41, the fourth partition plate 82, A part of the electric heater 72 is disposed in the passage 88 between them, but even when the flow resistance in the passage 88 is increased by the electric heater 72, the guide wall provided on the upstream side of the heater core 16. It is possible to eliminate the unevenness of the air flowing into the electric heater 72 by suitably guiding the air downward by 40.

  Further, by providing the guide wall 40, it is possible to prevent the inside air flowing through the lower air passage 36 from flowing into the upper air passage 34, so that the inside air having a high humidity with respect to the outside air is the outside air. It is possible to prevent fogging of the window when the air is mixed into the vehicle and blown into the vehicle interior.

  Further, by setting the second foot switching damper 57 in the valve open state and along the tip of the fourth partition plate 82, the warm air flowing through the passage 88 is guided to the first foot blower opening 24 and in the vicinity of the occupant's feet. It becomes possible to blow air.

  Furthermore, the above-described configuration is not applied only to the two-layered vehicle air conditioners 10, 70, 80, but is a vehicle air conditioner in which outside air or inside air is selectively supplied to the air conditioning case 12. It may be applied to the device. Even in such a vehicle air conditioner, the pressure on the lower side is increased in the air conditioning case, and the air flow tends to stagnate in the upper side. Therefore, the configuration as described above is effective.

  Further, the first and second air mix dampers 48 and 50 are not limited to the case where the operation trajectory is in the vertical direction (arrow C1, C2 direction) as described above. It may operate with a trajectory inclined by a predetermined angle or may operate with an arcuate trajectory. In such a case, the operation trajectories of the first and second air mix dampers 48 and 50 and the guide wall 40 are arranged in the air conditioning case 12 so as to overlap each other in the height direction (arrow C1 and C2 directions). The vehicle air conditioners 10, 70, 80 can be downsized in the front-rear direction (arrow A, B direction).

  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, 70, 80 ... Vehicle air conditioner 12 ... Air conditioning case 14 ... Evaporator 16 ... Heater core 18 ... Damper mechanism 26 ... Cold air passage 28 ... Hot air passage 30 ... 1st bypass passage 32 ... 2nd bypass passage 38 ... 1st partition Plate 40 ... Guide wall 41 ... Second partition plate 48 ... First air mix damper 50 ... Second air mix damper 72 ... Electric heater 82 ... Fourth partition plate

Claims (5)

A casing, a cooler and a heater provided in the casing, a cold air passage provided between the cooler and the heater, a hot air passage in which the heater is disposed, and the cooler A first bypass passage that bypasses the upper side of the heater on the downstream side of the heater, and an air mix door that is provided between the cooler and the heater and adjusts a mixing ratio of cold air and hot air Air conditioner for
Between the air mix door and the cooler, it extends along the air flow direction, and its downstream side is away from the first bypass passage side above the heater. A vehicle air conditioner comprising an inclined guide. The vehicle air conditioner according to claim 1,
The warm air passage includes a second heater on the downstream side of the heater,
The vehicle air conditioner characterized in that the guide extends from the first bypass passage toward the second heater. The vehicle air conditioner according to claim 1 or 2,
On the downstream side of the cooler, an upper and lower partition plate that divides into an upper passage and a lower passage is provided,
The heater is disposed across the upper and lower partition plates, and adjusts the flow rate of the hot air passage including the upper passage and the lower passage and the second bypass passage that bypasses the lower portion of the heater. A vehicle air conditioner comprising two air mix doors. In the vehicle air conditioner according to claim 3,
A passage partition plate that further divides the downstream side of the heater in the upper passage;
The vehicle air conditioner characterized in that air guided by the guide is guided toward a passage between the passage partition plate and the upper and lower partition plates. The vehicle air conditioner according to claim 4,
The air conditioner for vehicles, wherein the second heater is disposed so as to straddle the upper and lower partition plates, and is disposed below the passage partition plate.

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