JP2014151827A - Vehicle interior air-conditioning unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle interior air-conditioning unit capable of curbing a variation in temperature distribution of air blown off through a heat exchanger from unit to unit while permitting the variation in an arrangement position of the heat exchanger.SOLUTION: Because a heat exchanger downstream side passage 44 is positioned within a core section area Wcr where a core section 16a occupies in a horizontal direction of a vehicle, air blown off through the core section 16a does not spread in the horizontal direction of the vehicle even when a cooling heat exchanger 16 is arranged at any place within a predetermined arrangement area. Therefore, temperature distribution of the air in the heat exchanger downstream side passage 44 becomes less affected by an arrangement position of the cooling heat exchanger 16. Thus, a vehicle interior air-conditioning unit 10 can curb a variation in temperature distribution of the air downstream of an air flow of the cooling heat exchanger 16 from unit to unit while permitting the variation in the arrangement position of the cooling heat exchanger 16.

Description

  The present invention relates to a technique for appropriately adjusting the temperature of air blown from a vehicle interior air conditioning unit.

  2. Description of the Related Art A vehicle interior air conditioning unit including an air conditioning case forming an air passage and a heat exchanger disposed in the air passage is conventionally known. For example, this is the vehicle interior air conditioning unit disclosed in Patent Document 1. The vehicle interior air conditioning unit of Patent Document 1 includes two heat exchangers arranged on the upstream side and the downstream side of the air flow. The upstream heat exchanger is an evaporator, and the downstream heat exchanger is a heater core.

JP-A-9-123748

  In the vehicle interior air conditioning unit as in Patent Document 1, the arrangement position of the heat exchanger may vary with respect to the air conditioning case for each unit due to the influence of piping or the like connected to the heat exchanger. For example, regarding the evaporator, the arrangement position of the evaporator with respect to the air conditioning case may vary for each unit due to the influence of an expansion valve and piping connected to the evaporator or the influence of the vehicle-side piping when mounted on the vehicle.

  If it becomes so, the dispersion | variation will arise for every vehicle interior air-conditioning unit in the temperature distribution of air in the air exit of a heat exchanger. As a result, such variation in temperature distribution has adversely affected the temperature control of the air blown out from the passenger compartment air conditioning unit.

  In view of the above points, the present invention is a vehicle interior air conditioning unit capable of suppressing variation in the temperature distribution of air blown from the heat exchanger for each unit while allowing variation in the arrangement position of the heat exchanger. The purpose is to provide.

In order to achieve the above object, in the invention according to claim 1, an air conditioning case (12) forming an air passage (28) through which air flows,
A heat exchanger (16) disposed in the air passage in the air conditioning case and having a core (16a) through which air passes;
The air passage is disposed downstream of the heat exchanger and protrudes inward of the air passage along one direction (DR1) intersecting the air flow direction of the air passage. A guide (40) forming a narrowed heat exchanger downstream passage (44),
The guide is formed such that the heat exchanger downstream passage enters the range occupied by the core portion in one direction, regardless of where the heat exchanger is disposed within the predetermined range in one direction. And

  According to the above-described invention, even if the arrangement position of the heat exchanger varies within the predetermined range in the one direction, the heat exchanger downstream passage enters the range occupied by the core portion in the one direction. The air blown from the air does not spread in one direction. Therefore, the temperature distribution of the air in the heat exchanger downstream passage is less affected by variations in the arrangement position of the heat exchanger. Therefore, it is possible to suppress variation in the temperature distribution of the air downstream of the air flow of the heat exchanger for each unit while allowing variation in the arrangement position of the heat exchanger.

  In addition, each code | symbol in the parenthesis described in this column and the claim respond | corresponds to each code | symbol described in embodiment mentioned later.

It is sectional drawing of the vehicle interior air conditioning unit 10 in 1st Embodiment, Comprising: It is the figure showing schematic structure of the vehicle interior air conditioning unit 10. FIG. It is II-II sectional drawing in FIG. It is sectional drawing of the same direction as FIG. 1, Comprising: It is the figure which showed the ideal arrangement position of the heat exchanger 16 for cooling of FIG. It is sectional drawing of the vehicle interior air conditioning unit 10 in 2nd Embodiment, Comprising: It is a figure corresponded in FIG. FIG. 5 is a detailed view in which a V portion in FIG. 4 is enlarged and displayed. It is sectional drawing of the vehicle interior air conditioning unit 10 in 3rd Embodiment, Comprising: It is a figure equivalent to FIG. FIG. 7 is an enlarged detailed view of the VII portion in FIG. 6, wherein FIG. 6A is a view showing a state where the guide 40 is attached to the air conditioning case 12 in the VII portion of FIG. The figure shows a state where the guide 40 is not attached to the air conditioning case 12. FIG. 2 is a view corresponding to FIG. 1, and is a cross-sectional view of the vehicle interior air conditioning unit 10 in which one of two guides 40 is not provided. FIG. 3 is a view corresponding to FIG. 2, and is a cross-sectional view of the vehicle interior air conditioning unit 10 in which a guide 40 is formed in a part of the air passage 28 in the vehicle vertical direction DR3. FIG. 3 is a view corresponding to FIG. 2, and is a cross-sectional view showing the vehicle interior air conditioning unit 10 in which the air mix door 20 of FIG. 1 is replaced with a slide type air mix door 80. FIG. 3 is a view corresponding to FIG. 2, and is a cross-sectional view showing the vehicle interior air conditioning unit 10 in which the air mix door 20 of FIG. 1 is replaced with an air mix film door 82. It is sectional drawing of the vehicle interior air conditioning unit 10 which showed the example from which the arrangement direction of the heat exchanger 16 for cooling differs with respect to the vehicle interior air conditioning unit 10 of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
1 and 2 show a first embodiment of a vehicle interior air conditioning unit 10 according to the present invention. FIG. 1 and FIG. 2 show a schematic configuration of the vehicle interior air conditioning unit 10 and are shown in cross section so that the air flow in the vehicle interior air conditioning unit 10 can be understood. 2 is a sectional view taken along line II-II in FIG. In FIG. 1 and FIG. 2, left, right, front, rear, up and down arrows DR1, DR2, and DR3 indicate directions when the vehicle interior air conditioning unit 10 is mounted on the vehicle. The arrows DR1, DR2, DR3 are orthogonal to each other. Further, in a vehicle on which the vehicle interior air conditioning unit 10 is mounted, the driver's seat is arranged on the left side of the vehicle.

  The vehicle interior air conditioning unit 10 is an air conditioning unit disposed in the vehicle interior, and constitutes a vehicle air conditioner together with, for example, a compressor and a condenser disposed in the engine room.

  As shown in FIG. 1, the vehicle interior air conditioning unit 10 includes an air conditioning case 12 which is a casing. As shown in FIGS. 1 and 2, in the air conditioning case 12, the blower 14, the heat exchanger 16 for cooling, the heat exchanger 18 for heating, the air mix door 20, the first blow-out mode door 22, and the second A blowing mode door 24 and an expansion valve 26 are provided. Note that arrows FL1, FL2, FL3, FL4, FL5, FL6, FL7, and FL8 shown in FIGS. 1 and 2 represent air flows in the air conditioning case 12, respectively.

  The blower 14 blows out air toward the cooling heat exchanger 16 as indicated by an arrow FL1.

  The cooling heat exchanger 16 is an evaporator disposed on the downstream side of the air flow with respect to the blower 14. That is, the cooling heat exchanger 16 is disposed in the air passage 28 formed on the downstream side of the blower 14 in the air conditioning case 12. This air passage 28 corresponds to the air passage of the present invention.

  The cooling heat exchanger 16 is connected to the expansion valve 26 via a pipe 30 as shown in FIGS. And the heat exchanger 16 for cooling comprises the well-known refrigeration cycle apparatus which circulates a refrigerant | coolant with the expansion valve 26 grade | etc., And cools the air which blown off from the air blower 14 by evaporating a refrigerant | coolant. Specifically, the cooling heat exchanger 16 includes a core portion 16a through which air from the blower 14 passes and heat-exchanges the air and the refrigerant, and the air from the blower 14 is cooled in the core portion 16a. Is done. In the air passage 28 in which the cooling heat exchanger 16 is disposed, air flows in a direction orthogonal to the vehicle left-right direction DR1 as indicated by an arrow FL2. The cooling heat exchanger 16 corresponds to the heat exchanger in the present invention.

  In the air conditioning case 12, a hot air passage 32 is formed on the air flow downstream side of the air passage 28 where the cooling heat exchanger 16 is disposed, that is, on the air flow downstream side of the cooling heat exchanger 16. The heating heat exchanger 18 is disposed in the hot air passage 32. The heating heat exchanger 18 is a heater core that heats the air from the cooling heat exchanger 16 with engine cooling water that is hot water. The heating heat exchanger 18 corresponds to the heater of the present invention.

  In the air conditioning case 12, a cold air bypass passage 34 is formed on the downstream side of the air flow of the cooling heat exchanger 16. The cold air bypass passage 34 is formed in parallel with the hot air passage 32 in the air flow in the air conditioning case 12. The cold air bypass passage 34 is a passage through which the air from the cooling heat exchanger 16, that is, the cold air flows without passing through the heating heat exchanger 18.

  The air mix door 20 is a rotating door that rotates about one axis, and is disposed on the upstream side of the air flow in the hot air passage 32 and the cold air bypass passage 34. The air mix door 20 adjusts the air volume ratio of the air flowing through the hot air passage 32 and the cold air bypass passage 34 according to the rotation angle, thereby adjusting the temperature of the air blown into the vehicle interior. For example, the air mix door 20 is continuously within the range from the maximum heating position where the cold air bypass passage 34 is fully closed, that is, the MAXHOT position, to the maximum cooling position where the hot air passage 32 is fully closed, that is, the MAXCOOL position. Rotate.

  In the air conditioning case 12, an air mixing chamber 36 is formed on the downstream side of the air flow between the hot air passage 32 and the cold air bypass passage 34. In the air mixing chamber 36, the hot air that has passed through the hot air passage 32 as indicated by the arrow FL7 and the cold air that has passed through the cold air bypass passage 34 as indicated by the arrow FL6 are mixed.

  In the air conditioning case 12, a defroster opening 12 a, a face opening 12 b, and a foot opening 12 c are formed downstream of the air mixing chamber 36. The defroster opening 12a is an opening that blows conditioned air toward the inner surface of the window glass in the passenger compartment. The face opening 12b is an opening that blows conditioned air toward the upper body of the passenger in the vehicle interior. The foot opening 12c is an opening that blows conditioned air toward the lower half of the occupant.

  The 1st blowing mode door 22 and the 2nd blowing mode door 24 are rotational doors which rotate around one axis. The 1st blowing mode door 22 opens and closes the foot opening part 12c. The second blowing mode door 24 closes one of the defroster opening 12a and the face opening 12b and opens the other.

  For example, the vehicle interior air conditioning unit 10 is any one of a defroster mode that blows air exclusively from the defroster opening 12a, a face mode that blows air exclusively from the face opening 12b, and a foot mode that blows air exclusively from the foot opening 12c. It can be switched to the blowing mode. In FIG. 2, since the 1st blowing mode door 22 has blocked | closed the foot opening part 12c, and the 2nd blowing mode door 24 has shown the state which block | closed the defroster opening part 12a, the blowing mode is face mode. . That is, the air from the air mixing chamber 36 is blown out exclusively to the face opening 12b as indicated by the arrow FL8.

  As shown in FIG. 1, piping 30 and the like from the expansion valve 26 are connected to the cooling heat exchanger 16, and as a result, the arrangement position of the cooling heat exchanger 16 changes the air flow in the air passage 28. The vehicle varies in the vehicle left-right direction DR1 that intersects the direction (see arrow FL2). In detail, the cooling heat exchanger 16 is arranged in a vehicle arrangement direction DR1 within a predetermined arrangement range. This predetermined arrangement range corresponds to the predetermined range in the present invention, and the vehicle width direction, that is, the vehicle left-right direction DR1, corresponds to one direction in the present invention.

  For example, in FIG. 1, the cooling heat exchanger 16 is ideally disposed so that the center of the core portion 16 a coincides with the one-dot chain line Lctr that is the center position of the air passage 28. The center of 16a is shifted from the alternate long and short dash line Lctr by an arrangement difference ΔX1 in the vehicle left-right direction DR1.

  In order to absorb such variation in the arrangement position of the cooling heat exchanger 16, urethane foam is provided between each of the side end portions 16b of the cooling heat exchanger 16 and the air conditioning case 12 in the vehicle left-right direction DR1. The packing 38 which consists of these etc. is provided. With this packing 38 and another packing provided on the outer periphery of the cooling heat exchanger 16, air does not substantially flow through the outer periphery of the cooling heat exchanger 16 in the air passage 28. Only through the core portion 16 a of the cooling heat exchanger 16.

  As shown in FIG. 1, the vehicle interior air conditioning unit 10 includes a pair of guides 40. The guide 40 is disposed on the downstream side of the air flow with respect to the cooling heat exchanger 16 and on the upstream side of the air flow with respect to the heating heat exchanger 18 and the air mix door 20. Specifically, it is disposed immediately after the cooling heat exchanger 16 in the air flow. The guides 40 are respectively provided on the pair of case inner walls 42 that form the air passage 28 in the air conditioning case 12 and face the vehicle left-right direction DR1. The guide 40 protrudes from the case inner wall 42 toward the inside of the air passage 28 so as to narrow the passage width of the air passage 28 in the vehicle left-right direction DR1. The guide 40 has a rib shape extending in the vehicle vertical direction DR3, and is formed over the entire width of the air passage 28 in the vehicle vertical direction DR3 as shown in FIG.

  The pair of guides 40 protruding toward the inside of the air passage 28 form a heat exchanger downstream side passage 44 in which the passage width of the air passage 28 in the vehicle left-right direction DR1 is narrowed as shown in FIG. Yes. That is, the heat exchanger downstream side passage 44 is a part of the air passage 28 and corresponds to a portion of the air passage 28 that is narrowed by the guide 40. In short, in FIG. 1, a space between one tip 40 a and the other tip 40 a of the pair of guides 40 is a heat exchanger downstream passage 44. For example, in the vehicle left-right direction DR1, the distance from one tip 40a to the one-dot chain line Lctr in FIG. 1 and the distance from the other tip 40a to the one-dot chain line Lctr are equal to each other.

  In addition, the heat exchanger downstream passage 44 is viewed from the vehicle front-rear direction DR2 in FIG. 1, regardless of where the cooling heat exchanger 16 is disposed within the above-described predetermined arrangement range in the vehicle left-right direction DR1. In addition, the core portion 16a of the cooling heat exchanger 16 is positioned within the core portion range Wcr occupied in the vehicle left-right direction DR1. In other words, both ends 40a of the pair of guides 40 are located within the core portion range Wcr when viewed from the vehicle front-rear direction DR2.

  Therefore, of the air passing through the core portion 16a of the cooling heat exchanger 16, the air flowing in the vicinity of the side end portion 16b is guided to the inside of the air passage 28 by the guide 40 as indicated by arrows AR01 and AR02, for example. In other words, the guide 40 prevents the air cooled by the core portion 16a of the cooling heat exchanger 16 from spreading to one side or both sides of the vehicle left-right direction DR1 and flowing into the hot air passage 32 and the cold air bypass passage 34. Is done.

  As described above, according to the present embodiment, the heat exchanger downstream side passage 44 is disposed in the core portion 16a in the vehicle left-right direction DR1 regardless of where the cooling heat exchanger 16 is disposed within a predetermined arrangement range. Therefore, the air blown out from the core portion 16a does not spread in the vehicle left-right direction DR1. In other words, the air blown out from the core portion 16a does not expand or expand in the vehicle left-right direction DR1 according to the variation in the arrangement position of the cooling heat exchanger 16. Therefore, the air temperature distribution in the heat exchanger downstream side passage 44 is less affected by variations in the arrangement position of the cooling heat exchanger 16. Therefore, it is possible to suppress variation in the temperature distribution of the air downstream of the cooling heat exchanger 16 for each individual air conditioning unit 10 while allowing variation in the arrangement position of the cooling heat exchanger 16. It is. As a result, for example, it is possible to prevent the temperature distribution of the air blown out from the defroster opening 12a, the face opening 12b, or the foot opening 12c from varying for each individual vehicle interior air conditioning unit 10.

  For example, as shown in FIG. 3 showing the ideal arrangement position of the heat exchanger 16 for cooling, if the center of the core portion 16a coincides with the alternate long and short dash line Lctr that is the center of the air passage 28 in the vehicle left-right direction DR1. Even without the guide 40, the temperature distribution is symmetrical in the vehicle left-right direction DR1 about the one-dot chain line Lctr. In the vehicle interior air conditioning unit 10 of FIG. 1, even if the arrangement position of the cooling heat exchanger 16 varies in the vehicle left-right direction DR1, by providing the guide 40, the air flowing through the heat exchanger downstream passage 44 is 3, the temperature distribution can be symmetrical with respect to the vehicle left-right direction DR1.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, differences from the first embodiment will be mainly described, and the same or equivalent parts as those in the first embodiment will be omitted or simplified. The same applies to a third embodiment described later.

  In the first embodiment described above, the guide 40 is integrally fixed to the case inner wall 42, but in this embodiment, as shown in FIG. 4 and FIG. 5 which is an enlarged view of a V portion in FIG. The guide 40 rotates with respect to the air conditioning case 12.

  As shown in FIG. 4, the pair of guides 40 are configured symmetrically around a one-dot chain line Lctr. Specifically, as shown in FIG. 5, a guide rotation shaft 60 extending in the vehicle vertical direction DR <b> 3 (see FIG. 2) is provided on the case inner wall 42. A base end 40 b of the guide 40 opposite to the tip 40 a is connected to the guide rotation shaft 60. Therefore, the guide 40 rotates about the guide rotation shaft 60.

  The rotation range of the guide 40 is limited in advance by providing a stopper or the like, for example. Specifically, in FIG. 5, the guide 40 is moved from the first rotation position where the guide 40 stands vertically to the case inner wall 42 along the air flow to the state along the case inner wall 42. It rotates as shown by the arrow ARrt within the range up to the moving position. In FIG. 5, the guide 40 at the first rotation position is indicated by a solid line, and the guide 40 at the second rotation position is indicated by a two-dot chain line.

  Thus, since the guide 40 rotates around the guide rotation shaft 60, the amount of protrusion from the case inner wall 42 in the vehicle left-right direction DR1 can be changed. The protruding amount is maximum at the first rotation position and minimum at the second rotation position. In addition, the guide 40 of this embodiment becomes the same protrusion amount as the guide 40 of 1st Embodiment in the 1st rotation position shown as the continuous line in FIG.

  In the present embodiment, the guide 40 is not simply rotated, but is connected to the air mix door 20 by, for example, a link mechanism, and rotates in conjunction with the operation of the air mix door 20. Specifically, when the air mix door 20 is in the MAXCOOL position, the guide 40 is in the second rotation position. As the air mix door 20 approaches the MAXHOT position from the MAXCOOL position, the guide 40 rotates from the second rotation position toward the first rotation position.

  That is, the protruding amount of the guide 40 from the case inner wall 42 in the vehicle left-right direction DR1 is smaller when the air mix door 20 blocks the hot air passage 32 than when the hot air passage 32 is opened. Become. Thus, as the protruding amount of the guide 40 decreases, the ventilation area of the heat exchanger downstream passage 44 orthogonal to the air flow direction increases, and the ventilation resistance of the heat exchanger downstream passage 44 decreases. In addition, a pair of guide 40 shown in FIG. 4 performs the same operation | movement mutually.

  In the vehicle interior air conditioning unit 10, when the air mix door 20 is in the MAXCOOL position, the air cooled by the cooling heat exchanger 16 is not regulated by the opening of the air mix door 20. Even if there is a variation in the temperature distribution of the air downstream of the cooling heat exchanger 16 for each of the indoor air conditioning units 10, it does not matter much. On the other hand, when the air mix door 20 is away from the MAXCOOL position, the air cooled by the cooling heat exchanger 16 is adjusted in temperature by the opening degree of the air mix door 20, and therefore the cooling heat exchanger 16. It is better that the temperature distribution of the air downstream does not vary from individual to individual. When the air mix door 20 is in the MAXCOOL position, a large amount of air cooled by the cooling heat exchanger 16 is blown out from the vehicle interior air conditioning unit 10 in order to increase the cooling capacity of the vehicle interior air conditioning unit 10. It is preferred that it be possible.

  In this regard, according to the present embodiment, when the air mix door 20 is in the MAXCOOL position, the protrusion amount of the guide 40 from the case inner wall 42 to the vehicle left-right direction DR1 is smaller than when the air mix door 20 is not in the MAXCOOL position. Therefore, the protruding amount is increased or decreased according to the necessity to suppress the variation in the temperature distribution of the air downstream of the cooling heat exchanger 16. When the air mix door 20 is in the MAXCOOL position, the protruding amount of the guide 40 is reduced and the ventilation resistance is reduced. Therefore, a large amount of air cooled by the cooling heat exchanger 16 is supplied from the vehicle interior air conditioning unit 10. It is possible to blow out.

(Third embodiment)
In the first embodiment described above, the guide 40 is integrally fixed to the case inner wall 42. However, in this embodiment, as shown in FIG. 6 and FIG. 7 which is an enlarged view of the VII portion in FIG. The guide 40 is a separate member from the air conditioning case 12. 7A shows a state where the guide 40 is attached to the air conditioning case 12 in the VII portion of FIG. 6, and FIG. 7B shows a state where the guide 40 is not attached to the air conditioning case 12. .

  As shown in FIG. 6, the pair of guides 40 are configured symmetrically around a one-dot chain line Lctr. Specifically, as shown in FIGS. 7A and 7B, a guide fitting portion 72 having a guide fixing groove 70 for fitting the guide 40 is formed in the case inner wall 42.

  Then, as shown in FIG. 7A, the guide 40 is fixed to the case inner wall 42 by fitting the base end 40 b of the guide 40 into the guide fixing groove 70. For example, the guide 40 may be fixed to the case inner wall 42 by being press-fitted into the guide fixing groove 70, or may be fixed to the case inner wall 42 with an adhesive or the like.

  For example, in the manufacturing process of the vehicle interior air conditioning unit 10, the positional deviation in the vehicle left-right direction DR <b> 1 with respect to the air passage 28 of the cooling heat exchanger 16 is inspected, and the positional deviation is out of a predetermined allowable range. 40 is attached to the guide insertion portion 72. If the positional deviation is within the allowable range, the guide 40 is not attached to the guide insertion portion 72 and remains in the state as shown in FIG. The allowable range is, for example, the core portion 16a of the cooling heat exchanger 16 so that the displacement of the cooling heat exchanger 16 does not affect the temperature control of the air blown out from the openings 12a, 12b, 12c. Is experimentally set in advance so that the center of the air passage 28 coincides with the center position of the air passage 28 (see the one-dot chain line Lctr in FIG. 6).

  According to the present embodiment described above, the guide 40 functions in the same manner as in the first embodiment described above, so that the same effect as that in the first embodiment can be obtained.

(Other embodiments)
(1) In the first embodiment described above, the guides 40 are provided on both sides of the vehicle left-right direction DR1 in the air passage 28, but the mounting position of the cooling heat exchanger 16 varies in the vehicle left-right direction DR1. However, if the heat exchanger downstream side passage 44 enters the core portion range Wcr (see FIG. 1), the guide 40 may be provided only on one side in the vehicle left-right direction DR1, as shown in FIG.

  (2) In the first embodiment described above, the guide 40 is formed over the entire width of the air passage 28 in the vehicle vertical direction DR3 as shown in FIG. 2, but as shown in FIG. It may be formed in a part rather than the full width. In FIG. 9, the site | part which forms the guide 40, and the length of the guide 40, for example, the dispersion | variation in the attachment position of the heat exchanger 16 for cooling does not affect the temperature control of the air which blows off from each opening part 12a, 12b, 12c. As required experimentally.

  (3) In the above-described embodiment, the air mix door 20 is a rotary door as shown in FIG. 2, but is replaced with a slide type air mix door 80 that slides in the direction of the arrow AR03 as shown in FIG. It does not matter. The slide type air mix door 80 in FIG. 10 corresponds to the air mix door in the present invention.

  (4) In the above-described embodiment, the air mix door 20 is a rotary door as shown in FIG. 2, but as shown in FIG. The mixed film door 82 may be replaced. The air mix film door 82 in FIG. 11 corresponds to the air mix door in the present invention.

  (5) In the above-described embodiment, as shown in FIG. 2, the cooling heat exchanger 16 is arranged upright in the vehicle vertical direction DR3 in the air conditioning case 12, but the cooling heat exchanger 16 in the vehicle is arranged. There is no limitation on the direction of the. For example, the cooling heat exchanger 16 is disposed in the air-conditioning case 12 in a state where the air is horizontally placed in the cooling heat exchanger 16 in the vehicle vertical direction DR3, or in a state close to the horizontal placement as shown in FIG. It does not matter if it is done. In FIG. 12, the blower 14 is not shown, and the air from the blower 14 is sent to the cooling heat exchanger 16 as indicated by an arrow FL9.

  (6) In the second embodiment described above, the guide 40 rotates from the second rotation position toward the first rotation position as the air mix door 20 approaches the MAXHOT position from the MAXCOOL position. The air mix door 20 may continue to be held at the second rotational position until the air mix door 20 operates at a predetermined opening degree from the MAXCOOL position toward the MAXHOT position. The guide 40 does not need to be continuously rotated. For example, the rotation position of the guide 40 is either the first rotation position or the second rotation position depending on the operating position of the air mix door 20. There is no problem even if it is switched alternatively.

  (7) In the second embodiment described above, the guide 40 is connected to the air mix door 20 by a link mechanism or the like, so that the guide 40 rotates mechanically in conjunction with the operation of the air mix door 20. For example, the guide 40 may be rotated in conjunction with the operation of the air mix door 20 by electrical control.

  (8) In the second embodiment described above, the guide 40 is rotated in conjunction with the air mix door 20, but may be rotated without being interlocked.

  For example, when the guide 40 is not connected to the air mix door 20 by a link mechanism or the like, the guide 40 changes from the second rotation position indicated by the two-dot chain line in FIG. 5 to the first rotation position indicated by the solid line. Alternatively, it may be biased by a spring mechanism or the like. In such a case, the guide 40 rotates from the first rotation position to the second rotation position as the wind pressure of the air blown out from the cooling heat exchanger 16 increases. That is, the larger the wind pressure of the air, the smaller the protrusion amount of the guide 40 from the case inner wall 42 in the vehicle left-right direction DR1. When the air conditioning door 10 is in the auto mode cooling, the maximum air volume is normally obtained when the air mix door 20 is in the MAXCOOL position. Therefore, as the air mix door 20 approaches the MAXHOT position from the MAXCOOL position, the guide 40 is second. It turns from the turning position toward the first turning position.

  (9) In the first embodiment described above, in the vehicle mounting direction of the vehicle interior air conditioning unit 10 shown in FIGS. 1 and 2, air is blown out from the cooling heat exchanger 16 along the vehicle longitudinal direction DR2. There is no limitation on the vehicle mounting direction of the vehicle interior air conditioning unit 10, and for example, the vehicle interior air conditioning unit 10 is mounted on the vehicle so that air is blown from the cooling heat exchanger 16 along the vehicle left-right direction DR1 in FIG. It can be installed. When so mounted, for example, the vehicle longitudinal direction DR2 corresponds to one direction in the present invention.

  (10) In the above-described embodiment, the guide 40 is provided in the air passage 28 in which the cooling heat exchanger 16 is disposed. For example, in the hot air passage 32, the guide 40 is air to the heating heat exchanger 18. It may be provided immediately after the downstream side of the flow.

  (11) In the above-described embodiment, the air mix door 20 is disposed on the upstream side of the air flow in the hot air passage 32 and the cold air bypass passage 34, but may be disposed on the downstream side of the air flow. .

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like.

10 Car interior air conditioning unit 12 Air conditioning case 16 Heat exchanger for cooling (heat exchanger)
16a Core part 18 Heat exchanger for heating (heater)
20 Air Mix Door 28 Air Passage 32 Hot Air Passage 34 Cold Air Bypass Passage 44 Heat Exchanger Downstream Passage 80 Sliding Air Mix Door (Air Mix Door)
82 Air Mix Film Door (Air Mix Door)

Claims (3)

An air conditioning case (12) forming an air passage (28) through which air flows;
A heat exchanger (16) disposed in the air passage in the air conditioning case and having a core (16a) through which the air passes;
A passage width in the air passage is arranged on the downstream side of the air flow with respect to the heat exchanger and protrudes inward of the air passage along one direction (DR1) intersecting the air flow direction of the air passage. And a guide (40) forming a narrowed heat exchanger downstream passage (44),
The guide is formed so that the heat exchanger downstream passage enters the range occupied by the core portion in the one direction, regardless of where the heat exchanger is disposed within the predetermined range in the one direction. A vehicle interior air conditioning unit. The heat exchanger is a cooling heat exchanger for cooling the air;
A heater (18) for heating the air disposed in a hot air passage (32) formed on the downstream side of the air flow of the cooling heat exchanger in the air conditioning case;
A cold air bypass passage (34) formed in parallel with the hot air passage in the air conditioning case;
An air mix door (20, 80, 82) for adjusting an air volume ratio of the air flowing through the hot air passage and the cold air bypass passage;
The guide is configured to change the protruding amount in the one direction,
The amount of protrusion of the guide is smaller when the air mix door is blocking the hot air passage than when the air mix door is opening the hot air passage. Item 6. A vehicle interior air conditioning unit according to Item 1. The guide is configured to change the protruding amount in the one direction,
2. The vehicle interior air conditioning unit according to claim 1, wherein the protruding amount of the guide is reduced as the wind pressure of the air blown from the heat exchanger is increased.

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