JP2007099107A - Vehicle air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure a vehicle rear side view field, and drainability in a vehicle tilting state lowering in a rear side, in a vehicle air conditioner adopted to a small-sized special vehicle such as an agricultural tractor. <P>SOLUTION: An interior air-conditioning unit portion 13 is disposed so as to further project out to a rear side rather than a rear pillar 12 of a cabin at a ceiling portion of the cabin. A tilting draining passage 23a extending in a vehicular fore-and-aft direction and tilting downward from a vehicle rear side to a front side is formed at right and left both side parts of the cabin in a lower cover 23 covering a lower part of the interior air-conditioning unit portion 13. Condensed water of a rear side draining port 24b of the interior air-conditioning interior unit portion 13 is led to the tilting draining passage 23a, and a front side lower end portion of the tilting draining passage 23a is communicated to an inside space of the rear pillar 12 of a hollow shape. The condensed water in the tilting draining passage 23a flows into the inside space of the rear pillar 12 to be drained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner applied to a small special vehicle such as an agricultural tractor.

  Since the cabin (cab) in a small special vehicle such as an agricultural tractor is narrow, it is difficult to secure a mounting space for the indoor air conditioning unit in the cabin.

  Therefore, Patent Document 1 proposes a configuration in which the indoor air conditioning unit is mounted on the front portion of the cabin ceiling.

  Moreover, in patent document 2, while installing an indoor air-conditioning unit part in the center part of a cabin ceiling part, the drainage hose of the condensed water which generate | occur | produces in the heat exchanger for cooling of an indoor air-conditioning unit part is arrange | positioned in the four corners of a cabin. The structure connected with the internal space of a hollow vehicle pillar (support | pillar) is proposed.

According to this, the condensed water can be guided from the drain hose to the internal space of the hollow vehicle pillar, and drained to the vehicle lower portion by the hollow vehicle pillar.
JP-A-9-249020 Japanese Utility Model Publication No. 61-93309

  Incidentally, in recent years, as shown in FIG. 8, in order to improve the comfort in the cabin (increase the driver's overhead space) or improve the vehicle front view with respect to the prior arts of Patent Documents 1 and 2 above. In addition, a configuration in which the indoor air conditioning unit 13 is disposed on the ceiling of the cabin so as to protrude further rearward than the rear pillar 12 located at the rear end of the cabin has been put into practical use. In FIG. 8, reference numeral 14 indicates the entire ceiling roof, and 14 a indicates a rear side protruding region of the ceiling roof 14.

  In such a mounting layout, the condensate tray 24 is disposed below the cooling heat exchanger 17 of the indoor air conditioning unit 13, and the front drain port 24 a and the rear side are provided on both front and rear sides of the condensate tray 24. A drainage port 24b is formed, drainage hoses 26a and 26b are connected to the drainage ports 24a and 24b on both the front and rear sides, respectively, and the distal ends of the drainage hoses 26a and 26b penetrate through the hollow horizontal frame member 25 to form a hollow shape. The rear pillar 12 is inserted into the inner space.

  As a result, the condensed water generated in the cooling heat exchanger 17 is introduced into the inner space of the hollow rear pillar 12 via the condensed water tray 24 → the drain ports 24 a and 24 b on both sides and the drain hoses 26 a and 26 b. The condensed water can be drained to the lower part of the vehicle through the rear pillar 12.

  However, such a condensate drainage structure has the following problems. That is, since a small special vehicle such as an agricultural tractor travels on a field with a lot of unevenness, the vehicle may travel in an inclined state in which the rear side of the vehicle is greatly lowered as shown in FIG.

  In this case, since the front part (exit part) of drainage hose 26a, 26b arrange | positioned toward the vehicle front from the condensate tray 24 becomes high, and a back part becomes a low-inclined state, condensed water is drained hose 26a, Drainage from 26b toward the hollow rear pillar 12 is not possible. As a result, the amount of condensed water accumulated in the condensed water receiving tray 24 increases, causing water to jump into the cabin.

  Therefore, as shown by a broken line in FIG. 9, the entire bottom surface 23 ′ of the lower cover 23 that covers the lower portion of the indoor air-conditioning unit 13 is an inclined surface that descends forward, and the drain hose 26 a, It is conceivable that 26b is arranged in advance so as to have a predetermined slope that falls forward.

  According to this, even if the vehicle inclination state which falls backwards occurs, the front part (exit part) of the drainage hoses 26a and 26b can maintain the inclination state which is lower forward than the rear part, and the drainage of condensed water can be maintained. It can be secured.

  However, according to this measure, since the entire bottom surface 23 ′ of the lower cover 23 is an inclined surface that is lowered forward, the vertical dimension of the entire mounting structure of the indoor air conditioning unit 13 is increased, and the vehicle rear view is reduced. The trouble of obstructing arises.

  In view of the above points, the present invention achieves both securing the vehicle rear field of view and ensuring drainage in a vehicle tilted state with the vehicle descending backward in a vehicle air conditioner applied to a small special vehicle such as an agricultural tractor. For the purpose.

In order to achieve the above object, in the present invention, the indoor air conditioning unit (13) is arranged so as to protrude further rearward than the rear pillar (12) of the cabin (10) at the ceiling of the cabin (10),
The indoor air conditioning unit (13) includes at least a blower (16) and a cooling heat exchanger (17) for cooling the blown air of the blower (16), and is cooled by the cooling heat exchanger (17). Cold air is blown into the cabin (10),
Drain ports (24a, 24b) for discharging condensed water generated in the heat exchanger for cooling (17) are arranged below the indoor air conditioning unit (13),
In the lower part of the indoor air conditioning unit (13), inclined drainage passages (23a) that extend in the vehicle front-rear direction and incline downward from the rear of the vehicle to the front are disposed in the left and right sides of the cabin (10).
Condensed water is introduced into the inclined drainage passage (23a) from the drainage ports (24a, 24b),
The rear pillar (12) has a hollow shape, the lower end on the front side of the inclined drainage passage (23a) communicates with the internal space of the rear pillar (12), and the condensed water in the inclined drainage passage (23a) is transferred to the rear pillar (12 ) And is discharged to the lower part of the vehicle.

According to this, since the inclined drainage passage (23a) extends in the vehicle front-rear direction at the lower portion of the indoor air conditioning unit (13) and is inclined downward from the vehicle rear to the front,
Even when a vehicle inclination state that falls backward is generated, it is possible to maintain the downward inclination of the inclined drainage passage (23a).

  As a result, the condensed water can be guided to the interior space of the hollow rear pillar (12) and discharged to the lower part of the vehicle even when the vehicle is tilted backward.

  In addition, since the inclined drainage passage (23a) is arranged on both the left and right side portions of the cabin (10), the driver's rear view can be secured even if the inclined drainage passage (23a) has a downwardly inclined shape.

In the present invention, specifically, as the drainage port, the front side drainage port (24a) arranged on the vehicle front side at the lower part of the indoor air conditioning unit (13) and the rear side drainage arranged on the vehicle rear side. Port (24b),
Condensed water discharged from the rear drain port (24b) is introduced into the inclined drainage passage (23a),
On the other hand, the condensed water discharged from the front drain port (24a) is introduced into the inner space of the rear pillar (12) by the drain hose (26).

Moreover, in this invention, as a drainage port, the front side drainage port (24a) arrange | positioned at the vehicle front side in the lower part of an indoor air-conditioning unit part (13), and the rear side drainage port (24b) arrange | positioned at a vehicle rear side. ) And
The condensed water discharged from both the front drain port (24a) and the rear drain port (24b) may be introduced into the inclined drain passage (23a).

Further, in the present invention, as the drainage ports, the left drainage ports (24a, 24b) disposed at the front and rear of the left side of the vehicle at the lower part of the indoor air conditioning unit (13) and the right drainage ports disposed at the front and rear of the right side of the vehicle. (24a, 24b)
Of the drainage ports (24a, 24b) on the left and right sides, the condensed water discharged from the rear drainage port (24b) is introduced into the inclined drainage passage (23a),
Of the drain ports (24a, 24b) on both the left and right sides, the condensed water discharged from the front drain port (24a) may be introduced into the internal space of the rear pillar (12) by the drain hose (26).

Further, in the present invention, as the drainage ports, the left drainage ports (24a, 24b) disposed at the front and rear of the left side of the vehicle at the lower part of the indoor air conditioning unit (13) and the right drainage ports disposed at the front and rear of the right side of the vehicle. (24a, 24b)
All of the condensed water discharged from the front and rear drain ports (24a, 24b) on the left and right sides may be introduced into the inclined drain passage (23a).

Moreover, in this invention, it has the lower cover (23) which covers the lower part of an indoor air-conditioning unit part (13),
Of the lower cover (23), a groove shape with a concave cross section is formed on both the left and right side portions, and an inclined drainage passage (23a) is formed by this groove shape,
The central region in the left-right direction of the lower cover (23) constitutes a substantially flat cover body (23b) that extends along the bottom surface of the indoor air conditioning unit (13) at a position higher than the inclined drainage passage (23a). ,
Condensed water falls from the drainage ports (24a, 24b) onto the cover body (23b) and is then introduced into the inclined drainage passage (23a).

  According to this, since the inclined drainage passage (23a) can be integrally formed with the lower cover (23) itself covering the lower part of the indoor air conditioning unit (13), the inclined drainage passage (23a) can be easily formed without using a separate member. Can be formed.

  In addition, since the condensed water falls from the drainage ports (24a, 24b) onto the cover body (23b) and is introduced into the inclined drainage passage (23a), the drainage hose (26) is connected to the drainage ports (24a, 24b). Condensed water can be discharged even without connecting. Accordingly, the product cost can be reduced by the amount of waste of the drainage hose (26).

  In the present invention, the protruding wall (23c) acting as a weir for preventing the condensed water on the cover main body (23b) from moving to the front side of the vehicle protrudes upward from the cover main body (23b). It is formed to extend in the left-right direction.

  According to this, the condensed water which fell on the cover main-body part (23b) from the drainage port (24a, 24b) can be reliably guide | induced into an inclination drainage channel (23a).

  In the present invention, the inclined drainage passages (23a) on both the left and right sides are specifically arranged on the rear side of the rear pillars (12) on both the left and right sides.

  According to this, the trouble of the hindrance of the rear view accompanying the arrangement of the inclined drainage passage (23a) can be solved at all.

  In addition, the code | symbol in the bracket | parenthesis of each said means and each means of a claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
FIG. 1 is a view showing an outline of a cabin and a mounting position of an indoor air conditioning unit in a small special vehicle to which the first embodiment is applied, specifically, an agricultural tractor. FIG. 1 (a) is a schematic plan sectional view, FIG. 1B is a schematic side sectional view. Note that the front, rear, left, and right arrows in FIGS. 1 to 4 indicate the direction of the vehicle.

  A cabin 10 in an agricultural tractor is configured such that pillars 11 and 12 are arranged at four corners on the front, rear, left and right sides to form a rectangular space. Between the left and right front pillars 11 and the left and right rear pillars 12, window glass, doors, and the like are arranged to seal the space of the cabin 10 from the external space.

  The indoor air conditioning unit 13 is arranged so as to protrude further rearward than the rear pillar 12 in the ceiling roof (ceiling part) 14 of the cabin 10. 2 to 4 exemplify the vehicle mounting structure of the indoor air conditioning unit 13, and FIG. 2 is a schematic plan view of the mounting structure of the indoor air conditioning unit 13, showing a state where the ceiling roof 14 is removed. 3 is a schematic side cross-sectional view, and FIG. 4 is a schematic front cross-sectional view as seen from the vehicle rear side.

  The indoor air conditioning unit 13 has a case 15 that constitutes an air passage. Specifically, the case 15 is divided into an upper divided case and a lower divided case that are divided in the vertical direction, and is molded from resin. The upper divided case and the lower divided case are integrally fastened by fastening means such as a screw or a metal spring click to form the case 15.

  A blower 16 is disposed on the most windward side of the air passage of the case 15. As is well known, the blower 16 is configured to rotationally drive a centrifugal multiblade fan 16a by a motor (not shown). Note that an inside / outside air switching mechanism (not shown) is provided at the suction port of the blower 16 so that the inside air (air inside the cabin 10) and outside air (air outside the cabin 10) can be switched and introduced.

  In the case 15, an evaporator 17 that constitutes a cooling heat exchanger is disposed on the blow-out side (downward side) of the blower 16, and a heater core that forms a heating heat exchanger on the leeward side (vehicle front side) of the evaporator 17. 18 is arranged.

  The evaporator 17 is provided in a refrigeration cycle having a compressor driven by a vehicle engine (not shown), and cools the blown air by the low-temperature refrigerant on the low pressure side of the refrigeration cycle absorbing the latent heat of vaporization from the blown air. The heater core 18 heats the air by using hot water (engine cooling water) from the vehicle engine as a heat source.

  In the present embodiment, the entire amount of air that has passed through the evaporator 17 passes through the heater core 18, and the heater core 18 is heated by a hot water valve (not shown) provided in the hot water circuit of the heater core 18. By adjusting the hot water flow rate, the heating capacity of the heater core 18 can be adjusted, and the temperature of the air blown into the cabin 10 can be adjusted.

  In the case 15 of the indoor air conditioning unit 13, a blowout passage portion 19 (see FIG. 1A and FIG. 2) is provided in the leeward side portion of the heater core 18, and the blowout passage portion 19 branches to the left and right sides of the cabin 10. Is formed. The left and right ceiling ducts 20 are connected to the left and right branch ends 19 a and 19 b of the blowout passage portion 19.

  As shown in FIGS. 1 (a) and 1 (b), the ceiling duct 20 is disposed immediately below the ceiling roof 14 of the cabin 10 and on both the left and right sides. The ceiling duct 20 is disposed so as to extend in the vehicle front-rear direction, the face air outlet 21 is disposed at an intermediate portion of the ceiling duct 20 in the vehicle front-rear direction, and the foot duct 20 is located near the front end of the ceiling duct 20 in the vehicle front-rear direction. A defroster outlet 22 is disposed.

  The face outlet 21 blows out conditioned air (mainly cold air) from the outlet passage 19 toward the upper body of the driver A in the cabin 10. On the other hand, the foot / defroster air outlet 22 blows out the conditioned air (mainly hot air) from the air outlet passage 19 downward along the inner surface of the vehicle front window glass. It also serves as a foot outlet that allows warm air to reach the foot and a defroster outlet that prevents fogging of the front window glass of the vehicle.

  In addition, the air blowing from the face outlet 21 and the air blowing from the foot / defroster outlet 22 can be intermittently performed by an unillustrated outlet mode door or a grill mechanism provided in each outlet 21, 21. Yes.

  Next, the condensed water drainage structure in the indoor air conditioning unit 13 will be described in detail. As shown in FIGS. 1B and 3, the ceiling roof 14 is formed so as to protrude further rearward than the rear pillar 12. A lower cover 23 is disposed below the rear-side protruding region 14 a of the ceiling roof 14. The lower cover 23 constitutes a housing space for the indoor air conditioning unit 13 between the rear projecting region 14 a of the ceiling roof 14, and the lower part of the indoor air conditioning unit 13 is covered by the lower cover 23.

  In the case 15 of the indoor air conditioning unit 13, a condensate tray 24 (FIGS. 3 and 4) is formed below the evaporator 17 so as to protrude downward. The condensate tray 24 receives a condensate falling from the evaporator 17 by forming a concave dish shape protruding downward from the bottom surface of the case 15. The condensed water receiving tray 24 is integrally formed in the lower divided case of the case 15.

  Front drainage ports 24 a are formed at two locations on the left and right sides of the condensate tray 24, and rear drainage ports 24 b are formed at two locations on the left and right sides of the condensate tray 24. The front-side drain port 24a has a pipe shape and protrudes toward the front side of the vehicle. The rear side drainage port 24b has a pipe shape and protrudes toward the rear side of the vehicle.

  The lower cover 23 is an injection-molded resin member in this example, and a groove shape having a concave cross section is formed on both left and right sides of the lower cover 23, and an inclined drainage passage 23a is formed by this groove shape. As shown in FIG. 3, the inclined drainage passage 23a extends in the vehicle front-rear direction and has a shape inclined downward from the rear of the vehicle to the front.

  Here, the recessed groove-shaped portions on the left and right sides of the lower cover 23, that is, the inclined drainage passage 23a portions, are arranged at the rear positions of the left and right rear pillars 12 in the vehicle left-right direction as shown in FIGS. Is done.

  A central region in the left-right direction of the lower cover 23 forms a cover main body portion 23b. The cover main body 23 b forms a substantially flat surface that extends along the bottom surface of the case 15 of the indoor air conditioning unit 13. The cover body 23b is formed at a position below the condensed water tray 24 and higher than the inclined drainage passage 23a.

  Of the cover main body 23b, a protruding wall 23c extending in the vehicle left-right direction is provided at an intermediate portion in the vehicle longitudinal direction, more specifically, at an intermediate portion between the front drain port 24a and the rear drain port 24b of the condensed water tray 24. The cover body 23b is integrally formed.

  The projecting wall 23c has a plate-like projecting shape projecting upward from the cover main body 23b, and is formed in the entire area of the cover main body 23b in the left-right direction of the vehicle as shown in FIGS. And the concave shape is formed in the center part of the vehicle left-right direction of the protrusion wall 23c, and interference with the protrusion wall 23c and the condensed water receiving tray 24 is avoided by this concave shape.

  The rear side drainage port 24b is directly open above the rear side region of the cover main body 23b. For this reason, the condensed water falls from the opening end of the rear side drain port 24b to the rear side region of the cover main body 23b. Here, the protruding wall 23c acts as a weir that prevents the condensed water on the cover main body portion 23b from moving to the front side of the vehicle, so the condensed water in the rear side region of the cover main body portion 23b is left and right inclined drainage passages. 23a is introduced.

  The upper end portions of the left and right rear pillars 12 are integrally connected by a horizontal frame member 25 extending in the vehicle left-right direction as shown in FIGS. The rear pillar 12 extends in the vertical direction in a hollow shape having a rectangular cross section (in other words, a rectangular tube shape). Similarly, the horizontal frame member 25 has a hollow shape with a rectangular cross section.

  In the vicinity of the upper ends of the left and right rear pillars 12, drainage holes 12a are opened in the rear wall surface as shown in FIG. The height of the opening position of the drainage hole 12a is set to coincide with the lower end on the front side of the inclined drainage passage 23a. Therefore, the lower end on the front side of the inclined drainage passage 23a communicates with the internal space of the rear pillar 12 through the drainage hole 12a.

  Thereby, the condensed water in the inclined drainage passage 23a is introduced into the inner space of the left and right rear pillars 12, and the condensed water can be drained to the vehicle lower part using the hollow shape of the rear pillars 12.

  On the other hand, drainage hoses 26 are connected to the front side drainage ports 24a at the left and right of the condensate tray 24, respectively. The drainage hose 26 is made of flexible rubber, and the distal ends of the left and right drainage hoses 26 are inserted into the inner spaces of the left and right rear pillars 12 through insertion holes 25a formed in the upper and lower wall surfaces of the horizontal frame member 25. Inserted. Thereby, the condensed water of the front side drain port 24a is introduced into the inner space of the rear pillar 12 through the drain hose 26 and drained to the lower part of the vehicle.

  Next, the operation in the above configuration will be described. In the summer cooling mode, the refrigerant and the blower 16 in the refrigeration cycle (not shown) are operated to circulate the refrigerant in the evaporator 17 and the blown air (inside air or outside air) from the blower 16 is blown to the evaporator 17. . Accordingly, the blown air is cooled by the evaporator 17 and becomes cold air.

  Here, if a hot water valve (not shown) installed in the hot water circuit of the heater core 18 is operated to the fully closed position, the heat radiation in the heater core 18 can be stopped, so that the cold air after passing through the evaporator 17 is heated by the heater core 18. It passes through the heater core 18 as it is without being blown. Therefore, the maximum cooling capacity can be exhibited.

  The cold air that has passed through the heater core 18 flows into the left and right ceiling ducts 20 from the air outlet passage portion 19 of the case 15, and the cold air is blown out from the face air outlet 21 toward the upper body of the driver A, thereby cooling the cabin 10. Done.

  In the cooling mode, air blowing from the foot / defroster air outlet 22 is blocked by a grill mechanism (not shown) provided in the air outlet 22 or the foot / defroster air outlet 22. If the hot water valve is opened and the hot water flow rate of the heater core 18 is adjusted, the temperature of the cool air blown from the face outlet 21 can be adjusted.

  Condensed water is generated on the surface of the evaporator 17 by the cooling action of the evaporator 17, and this condensed water falls on the condensed water receiving tray 24 by gravity. Since the front drain port 24a and the rear drain port 24b are respectively disposed at the left and right two locations on the front side and the rear left and right sides of the condensate tray 24, the condensate tray when the vehicle is traveling horizontally. The condensed water in 24 is dispersed and drained to a total of four drain ports 24a and 24b on the front, rear, left and right sides.

  Condensed water in the left and right front drain ports 24a is introduced into the inner spaces of the left and right rear pillars 12 via the left and right drain hoses 26, respectively, and drained to the lower part of the vehicle. On the other hand, in the left and right rear drain ports 24b, the condensed water falls from the opening ends thereof to the rear region of the cover body 23b of the lower cover 23.

  Since the condensate that has fallen in the rear region is prevented from moving to the front side of the vehicle by the protruding wall 23c, the condensate in the rear region of the cover body 23b flows into the left and right inclined drainage passages 23a. The condensed water in the inclined drainage passage 23a moves forward due to the inclination of the inclined drainage passage 23a, and the condensed water flows into the internal space of the rear pillar 12 from the lower end on the front side of the inclined drainage passage 23a through the drainage hole 12a. Drained to the lower part of the vehicle.

  Then, when the vehicle is tilted rearward as shown in FIG. 9, the condensed water in the condensed water receiving tray 24 moves to the rear side, and most of the condensed water flows from the rear drain port 24b to the lower cover 23. It falls to the rear side area of the cover body 23b.

  Here, since the inclination angle of the inclined drainage passage 23a is set so as to maintain the downward inclination toward the front side of the vehicle even in the normal downwardly inclined vehicle inclination state, the inclination drainage passage 23a falls to the rear side region of the cover main body portion 23b. The condensed water can flow to the front side of the vehicle through the inclined drainage passage 23a. Therefore, even in a vehicle tilt state that is lowered rearward, the condensed water passes through the drainage holes 12a from the left and right inclined drainage passages 23a, flows into the inner space of the left and right rear pillars 12, and can be drained to the lower part of the vehicle.

  On the contrary, when the vehicle is inclined forward and downward, the condensed water in the condensed water tray 24 moves to the front side, so that most of the condensed water is discharged from the left and right front drain ports 24a. After that, it flows into the internal space of the left and right rear pillars 12 and can be drained to the lower part of the vehicle.

  It should be noted that the condensate that has fallen to the rear side region of the cover main body 23b of the lower cover 23 is prevented from moving to the front side of the vehicle by the projecting wall 23c in the vehicle inclination state of the lower cover 23. Flow into. Accordingly, the condensed water from the inclined drainage passage 23a passes through the drainage hole 12a and flows into the inner spaces of the left and right rear pillars 12, and is drained to the lower part of the vehicle.

  By the way, according to the drainage structure of the present embodiment, the inclined drainage passages 23a are arranged at the left and right side positions of the lower cover 23, more specifically, at the rearward positions of the rear pillars 12, so As shown in FIGS. 3 and 4, even if the front side lower end portion protrudes downward from the surface of the cover main body 23 b, the driver's rear view is not hindered by the inclined drainage passage 23 a.

  Therefore, according to the present embodiment, it is possible to satisfactorily achieve both the drainage of condensed water in the vehicle inclination state with the vehicle descending backward and the securing of the driver's rear view.

  In the above description of the operation, the air blowing from the foot / defroster outlet 22 is stopped, and the cooling mode in which the cool air is blown out only from the face outlet 21 is explained. Air blowing may be stopped, and the warm air heated through the heater core 18 may be blown out only from the foot / defroster outlet 22. If the refrigeration cycle is operated in the heating mode, the evaporator 17 exhibits a dehumidifying action, so that the cabin 10 can be dehumidified and heated.

  Further, the bi-level mode can be set by blowing air simultaneously from both the face outlet 21 and the foot / defroster outlet 22.

(Second Embodiment)
In the first embodiment described above, the drainage hoses 26 are connected to the left and right front drain ports 24a of the condensate tray 24, respectively, and the leading ends of the drainage hoses 26 are inserted into the internal spaces of the left and right rear pillars 12. However, in the second embodiment, as shown in FIG. 5, the drain hose 26 is not connected to the front drain port 24 a, and the front end of the front drain port 24 a is directly above the cover main body 23 b of the lower cover 23. It is open.

  For this reason, in the second embodiment, the position of the protruding wall 23c is changed to the position of the foremost end of the cover body 23b. Thereby, the condensed water falling to the rear side area of the cover main body 23b and the condensed water falling to the front side area of the cover main body 23b from the front drain port 24a move to the front side of the cover main body 23b. I can stop.

  Therefore, all of the condensed water that has fallen on the cover main body portion 23b can flow into the left and right inclined drainage passages 23a, and can be drained to the vehicle lower portion through the internal space of the left and right rear pillars 12.

  In the second embodiment as well, it is possible to satisfactorily balance the drainage of condensed water in the vehicle inclination state with the vehicle descending backward and the driver's rear view, and to completely eliminate the drainage hose 26, thereby reducing costs. it can.

(Third embodiment)
In the first embodiment described above, the front drain port 24a protruding from the front part of the condensed water tray 24 to the vehicle front side and the rear drain port 24a protruding from the rear part of the condensed water tray 24 to the vehicle rear side are provided. However, in the third embodiment, as shown in FIG. 6, a front drain port 24 a and a rear drain port 24 a that protrude to the left and right sides of the vehicle are provided on the left and right side portions of the condensate tray 24.

  In addition, in FIG. 6, although the structure which provides the drainage ports 24a and 24b in front and back of the left side part of the condensed water tray 24 is illustrated, the drainage port 24a and the front and back of the right side part (not shown) of the condensed water tray 24 are also illustrated. 24b is similarly provided. Therefore, also in the third embodiment, the drainage ports 24a and 24b are provided at a total of four locations, front, rear, left and right.

  The position of the protruding wall 23c is an intermediate portion between the front and rear drain ports 24a and 24b, as in the first embodiment, and a drain hose 26 is connected to each of the left and right front drain ports 24a. Is inserted into the internal space of the left and right rear pillars 12.

  The third embodiment is different from the first embodiment only in the location and the protruding direction of the drainage ports 24a and 24b, and the drainage function by the inclined drainage passage 23a can be exhibited similarly to the first embodiment. The same effect as 1 embodiment can be exhibited.

(Fourth embodiment)
FIG. 7 shows the fourth embodiment. The position of the protruding wall 23c in the third embodiment is changed to the position of the foremost end of the cover main body 23b in the same manner as the second embodiment (FIG. 5), and the drain hose 26 is changed. It has been abolished.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows.
(1) In the above-described embodiment, the example in which the distal end sides of the left and right drain hoses 26 are inserted into the inner spaces of the left and right rear pillars 12 through the insertion holes 25a formed in the upper and lower wall surfaces of the horizontal frame member 25 has been described. When the space for disposing the drainage hose 26 can be secured on the front side or the rear side of the horizontal frame member 25, an insertion hole is made in the rear pillar 12 so that the front end side of the drainage hose 26 is used as the internal space of the left and right rear pillars 12. You may make it insert directly.
(2) In the first and third embodiments described above, the tip of the rear drain port 24b is opened directly above the cover body 23b of the lower cover 23, but the left and right rear drain ports 24b Alternatively, a drain hose may be connected, and the leading end of the drain hose may be inserted into the left and right inclined drain passages 23a.
(3) In the first embodiment described above, the example in which the entire amount of air passing through the evaporator 17 passes through the heater core 18 has been described. However, the cold air bypass passage and the cold air bypass door that opens and closes the cold air bypass passage in parallel with the heater core 18. In the maximum cooling when the hot water valve (not shown) is fully closed by the hot water valve (not shown), the cold air bypass door is operated to the fully open position of the cold air bypass passage in conjunction with the fully closed operation of the hot water valve. Then, the ventilation resistance at the time of maximum cooling can be reduced and the amount of air blown into the cabin 10 can be increased, so that the maximum cooling performance can be improved.
(4) In the above-described first embodiment, the example in which the hot water flow rate to the heater core 18 is adjusted by the hot water valve to adjust the temperature of the blown air into the cabin 10 has been described, but the cold air bypass passage is in parallel with the heater core 18. And an air mix door that adjusts the air volume ratio between the cold air passing through the cold air bypass passage and the warm air passing through the heater core 18, and the temperature of the air blown into the cabin 10 is adjusted by adjusting the opening of the air mix door. You may make it adjust.

(A) is a schematic plane sectional view which shows the air-conditioner mounting structure by 1st Embodiment, (b) is a schematic side sectional drawing. It is a schematic plan view of the mounting structure of the indoor air-conditioning unit part by 1st Embodiment. It is a schematic side sectional view of the mounting structure of the indoor air conditioning unit according to the first embodiment. It is a schematic front sectional view seen from the vehicle back side of the indoor air-conditioning unit part by a 1st embodiment. It is a schematic sectional side view of the mounting structure of the indoor air-conditioning unit part by 2nd Embodiment. It is a schematic sectional side view of the mounting structure of the indoor air-conditioning unit part by 3rd Embodiment. It is a schematic side sectional drawing of the mounting structure of the indoor air-conditioning unit part by 4th Embodiment. It is a schematic sectional side view of the mounting structure of the indoor air-conditioning unit part by a prior art. FIG. 9 is a schematic side cross-sectional view showing a vehicle inclination state with a rearward lowering in FIG. 8.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Cabin, 12 ... Back pillar, 13 ... Indoor air-conditioning unit part, 14 ... Ceiling roof,
16 ... Blower, 17 ... Evaporator (cooling heat exchanger), 23 ... Lower cover,
23a ... Inclined drainage passage, 23b ... Cover main body, 23c ... Projection wall, 24 ... Condensate tray,
24a, 24b ... drainage port, 26 ... drainage hose.

Claims (8)

An indoor air conditioning unit (13) arranged to protrude further rearward than the rear pillar (12) of the cabin (10) at the ceiling of the cabin (10);
The indoor air conditioning unit (13) includes at least a blower (16) and a cooling heat exchanger (17) for cooling the blown air of the blower (16), and the cooling heat exchanger (17). The cold air cooled in is blown out into the cabin (10),
Drain ports (24a, 24b) for discharging condensed water generated in the heat exchanger for cooling (17) are disposed below the indoor air conditioning unit (13),
In the lower part of the indoor air conditioning unit (13), inclined drainage passages (23a) that extend in the vehicle front-rear direction and incline downward from the rear to the front of the vehicle are disposed in the left and right sides of the cabin (10). And
Condensed water is introduced into the inclined drainage passage (23a) from the drainage ports (24a, 24b),
The rear pillar (12) has a hollow shape, the lower end on the front side of the inclined drainage passage (23a) communicates with the internal space of the rear pillar (12), and the condensed water in the inclined drainage passage (23a) A vehicle air conditioner that flows into the interior space of the rear pillar (12) and is discharged to the vehicle lower portion. As the drainage port, a front drainage port (24a) disposed on the vehicle front side and a rear drainage port (24b) disposed on the vehicle rear side are provided below the indoor air conditioning unit (13). And
Condensed water discharged from the rear drain port (24b) is introduced into the inclined drainage passage (23a),
On the other hand, the condensate discharged from the front drain port (24a) is introduced into the internal space of the rear pillar (12) by a drain hose (26). apparatus. As the drainage port, a front drainage port (24a) disposed on the vehicle front side and a rear drainage port (24b) disposed on the vehicle rear side are provided below the indoor air conditioning unit (13). And
The vehicle according to claim 1, wherein condensed water discharged from both the front drain port (24a) and the rear drain port (24b) is introduced into the inclined drain passage (23a). Air conditioner. As the drain port, a left drain port (24a, 24b) disposed at the front and rear of the left side of the vehicle at a lower portion of the indoor air conditioning unit (13) and a right drain port (24a, 24b) disposed at the front and rear of the right side of the vehicle. ) And
Of the drainage ports (24a, 24b) on the left and right sides, condensed water discharged from the rear drainage port (24b) is introduced into the inclined drainage passage (23a),
Of the drain ports (24a, 24b) on the left and right sides, the condensed water discharged from the front drain port (24a) is introduced into the internal space of the rear pillar (12) by the drain hose (26). The vehicle air conditioner according to claim 1. As the drain port, a left drain port (24a, 24b) disposed at the front and rear of the left side of the vehicle at a lower portion of the indoor air conditioning unit (13) and a right drain port (24a, 24b) disposed at the front and rear of the right side of the vehicle. ) And
2. The vehicle air conditioner according to claim 1, wherein all the condensed water discharged from the front and rear drain ports (24 a, 24 b) on both the left and right sides is introduced into the inclined drain passage (23 a). A lower cover (23) covering a lower portion of the indoor air conditioning unit (13);
Of the lower cover (23), a groove shape having a concave cross section is formed on both left and right side portions, and the inclined drainage passage (23a) is formed by the groove shape,
A central region in the left-right direction of the lower cover (23) has a substantially flat cover body (23b) that extends along the bottom surface of the indoor air conditioning unit (13) at a position higher than the inclined drainage passage (23a). Configure
The condensed water is introduced into the inclined drainage passage (23a) after falling from the drainage port (24a, 24b) onto the cover body (23b). The vehicle air conditioner described in 1. A protruding wall (23c) that acts as a weir to prevent the condensed water on the cover main body (23b) from moving to the front side of the vehicle protrudes upward from the cover main body (23b) and extends in the vehicle left-right direction. The vehicle air conditioner according to claim 6, wherein the vehicle air conditioner is formed as described above. The vehicle air conditioner according to any one of claims 1 to 7, wherein the left and right inclined drainage passages (23a) are arranged on the rear side of the left and right rear pillars (12).

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