JP2014118054A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make condensed water less likely to adhere to a mating part of a casing when the condensed water of a heat exchanger for cooling flies off in the casing composed of multiple members and thereby inhibit the condensed water from leaking to the exterior of the casing.SOLUTION: An air conditioner 1 for a vehicle comprises: a heat exchanger 20 for cooling; a casing 30 which houses the heat exchanger 20 for the cooling; and a damper 23 which is housed in the casing 30. The air conditioner for the vehicle is formed so as to introduce air conditioning air into the casing 30 and passes the air through the heat exchanger 20 for the cooling. The casing 30 is formed by combining multiple members 50, 60. The damper 23 is formed so as to cover a mating part of the members 50, 60 forming the casing 30.

Description

  The present invention relates to a vehicle air conditioner mounted on, for example, an automobile.

  Conventionally, vehicle air conditioners have been provided with a casing that houses a heat exchanger for cooling and a heat exchanger for heating, and the temperature of the air-conditioning air introduced into the casing is adjusted by the heat exchanger to produce conditioned air. It produces | generates and is comprised so that it may supply to each part of a vehicle interior (for example, refer patent document 1).

  The casing of the vehicle air conditioner disclosed in Patent Document 1 is divided into a front casing that houses a heat exchanger for cooling, and a rear casing that houses a heat exchanger for heating and various dampers. In addition, the rear casing is divided in the vehicle width direction. The casing is constituted by fastening these four members with screws or the like.

  Inside the casing, air for air conditioning is introduced into the front casing, passes through the cooling heat exchanger, flows into the rear casing, and is temperature-controlled.

JP 2011-195091 A

  By the way, when a casing is divided | segmented into a front side casing and a rear side casing like patent document 1, the matching part of both casings is made.

  Further, when the air for air conditioning passes through the cooling heat exchanger, condensed water is generated on the surface of the cooling heat exchanger. In Patent Document 1, air-conditioning air flows from the front side to the rear side in the casing, and a cooling heat exchanger is accommodated in the front casing. Condensate may fly to the rear side due to the flow of air conditioning air.

  If the condensed water blown to the rear side adheres to the mating portion between the front casing and the rear casing, the condensate may leak out of the casing from the mating portion.

  In order to prevent this, it is conceivable to arrange a rubber sealing material or the like at the mating portion of the front casing and the rear casing, but in order to ensure a reliable sealing property, an expensive material, Since a multiple seal structure is required, the cost of the air conditioner increases.

  The present invention has been made in view of the above points, and the object of the present invention is to condense on the mating portion of the casing when the condensed water of the cooling heat exchanger flies in the casing made of a plurality of members. It is to prevent water from adhering and to prevent the condensed water from leaking out of the casing.

  In order to achieve the above object, in the present invention, focusing on the fact that various dampers are arranged in the casing, the mating portion can be covered with the damper so that the condensed water does not adhere to the mating portion of the casing. I did it.

The first invention is a cooling heat exchanger;
A casing for housing the cooling heat exchanger;
A damper housed in the casing,
In a vehicle air conditioner configured to introduce air for air conditioning into the casing and pass through the cooling heat exchanger,
The casing is configured by combining a plurality of members,
The damper is configured to cover a mating portion of members constituting the casing from the inside of the casing.

  According to this configuration, when the condensed water of the cooling heat exchanger is blown toward the matching portion of the casing by the flow of air-conditioning air, the matching portion is covered from the inside of the casing by the damper. It becomes possible to prevent water from adhering to the mating portion.

According to a second invention, in the first invention,
The damper has a pivot shaft supported by the casing so as to be pivotable in the vertical direction, and a closing plate portion extending in a radial direction from the pivot shaft,
A matching portion of the casing is located below the closing plate portion.

  According to this configuration, since the mating portion of the casing is covered from above by the closing plate portion of the damper, it is possible to prevent condensed water flying from the upper side to the mating portion of the casing from adhering to the mating portion.

According to a third invention, in the second invention,
Equipped with a heat exchanger for heating,
The said casing combines the 1st casing which accommodates the heat exchanger for cooling, and the 2nd casing in which the heat exchanger for heating is accommodated, and the air for an air conditioning is introduce | transduced into the 1st casing, and is supplied to a 2nd casing. Inflow,
Connected to the inside of the casing are a cold air passage in which the cooling heat exchanger is disposed, a hot air passage in which the heating heat exchanger is disposed, and the downstream ends of the cold air passage and the hot air passage. Air mix space is formed,
The damper is an air mix damper that changes the amount of cold air flowing into the air mix space from the cold air passage, and the amount of cold air flowing into the air mix space is increased by rotating downward. Is.

  In other words, the amount of condensed water generated in the cooling heat exchanger increases during cooling, so the amount of condensed water flying easily increases. However, according to the present invention, the air mix damper rotates downward and closes during cooling. Since the plate covers the mating portion of the casing from above, it is possible to prevent condensed water from adhering to the mating portion even during cooling.

According to a fourth invention, in any one of the first to third inventions,
The damper is provided with an extending portion that extends so as to cover the mating portion of the members constituting the casing,
One of the first casing and the second casing constituting the casing is provided with a guide portion that guides the other casing relative to one casing when the two casings are combined.

  According to this structure, the joint part of the member which comprises a casing is reliably covered with the extension part of a damper. In this case, it is possible to prevent the extension portion of the damper from interfering with the casing by guiding the other casing with the guide portion of one casing when the casing is assembled.

  According to the first invention, since the mating portion of the member constituting the casing is covered from the inside of the casing by the damper, the condensed water of the cooling heat exchanger is blown toward the mating portion of the casing. Condensed water is less likely to adhere to the mating portion of the casing, and leakage from the casing can be suppressed.

  According to the second aspect of the invention, since the casing mating portion is located below the damper closing plate portion, the condensed water flying from above to the casing mating portion is prevented from adhering to the mating portion. It is possible to prevent the condensed water from leaking out of the casing.

  According to the third aspect of the present invention, since the mating portion of the casing can be covered from above by the air mix damper that increases the amount of cool air flowing into the air mix space by rotating downward, the amount of condensed water during cooling is reduced. Even if it increases, it can prevent that condensed water adheres to a mating part.

  According to the fourth aspect of the invention, since the extension portion that covers the mating portion of the member that constitutes the casing is provided in the damper, the mating portion of the member that constitutes the casing can be reliably covered by the extension portion of the damper. And since it can guide by a guide part when combining a casing, it can prevent that the extension part of a damper interferes with a casing.

It is sectional drawing of the vehicle air conditioner which concerns on embodiment. It is sectional drawing which expands and shows the joint part vicinity of a front side casing and a rear side casing. FIG. 3 is a view corresponding to FIG. 2 showing a state before the front casing and the rear casing are combined.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a cross-sectional view of a vehicle air conditioner 1 according to the present invention. The vehicle air conditioner 1 is fixed to the vehicle in a state of being housed in an instrument panel (not shown) provided at the front end of the vehicle in the interior of the automobile.

  In the description of this embodiment, for convenience of explanation, the front side of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear”, the left side of the vehicle is simply referred to as “left”, and the right side of the vehicle is referred to. Is simply called “right”.

  The vehicle air conditioner 1 includes a blower unit (not shown) and an air conditioning unit 10. The air blowing unit is disposed on the passenger seat side, the air conditioning unit 10 is disposed at the center in the left-right direction, and the air blowing unit and the air conditioning unit 10 are connected. The blower unit includes a fan, an inside / outside air switching unit, and the like.

  The air conditioning unit 10 includes an evaporator 20 as a cooling heat exchanger, a heater core 21 as a heating heat exchanger, an air mix damper 23, a differential / vent switching damper 24, a heat damper 25, and a casing 30. ing. The casing 30 houses the evaporator 20, the heater core 21, the air mix damper 23, the differential / vent switching damper 24, and the heat damper 25.

  The casing 30 is divided into front and rear at an intermediate portion in the front and rear direction, and includes a front casing 50 and a rear casing 60. The front casing 50 and the rear casing 60 are fastened using, for example, screws. The evaporator 20 is accommodated in the front casing 50. On the other hand, the heater core 21, the air mix damper 23, the differential / vent switching damper 24 and the heat damper 25 are accommodated in the rear casing 60.

  The front casing 50 is divided into upper and lower parts at an intermediate portion in the vertical direction, and includes an upper member 51 and a lower member 52. The upper member 51 and the lower member 52 are also fastened using, for example, screws. Further, the rear casing 60 is divided into left and right at the middle portion in the left-right direction, and includes a right side member 61 and a left side member (not shown). The right side member 61 and the left side member are also fastened using, for example, screws.

  A lower portion of the rear wall portion of the front casing 50 is a vertical wall portion 50a extending in the vertical direction. The upper portion of the vertical wall portion 50a is an inclined wall portion 50b that is inclined so as to be located rearward as it goes upward. The formation of the vertical wall portion 50a prevents the condensed water generated in the evaporator 20 from flowing into the rear casing 60.

  A lower portion of the rear wall portion of the rear casing 60 is a vertical wall portion 60a extending in the vertical direction so as to face the vertical wall portion 50a of the front casing 50 in the front-rear direction. A gap is formed in the front-rear direction between the vertical wall portion 50 a of the front casing 50 and the vertical wall portion 60 a of the rear casing 60. Due to the formation of the vertical wall portions 50a and 60a, the boundary portion of the casing 30 between the front casing 50 and the rear casing 60 has a shape protruding upward (inward of the casing 30). Further, a boundary portion between the front casing 50 and the rear casing 60 in the upper wall portion of the casing 30 is formed so as to protrude upward (outward of the casing 30).

  The upper side of the rear wall portion of the front casing 50 above the vertical wall portion 50a and the upper side of the front wall portion of the rear casing 60 above the vertical wall portion 60a are opened so that the internal spaces communicate with each other. On the peripheral edge of the opening of the rear wall portion of the front casing 50, a front ridge 53 that protrudes rearward is formed in an annular shape. Further, a rear ridge 63 projecting forward is formed in an annular shape at the periphery of the opening of the front wall of the rear casing 60. The front protrusions 53 and the rear protrusions 63 are configured such that the front ends of the protrusions come into contact with each other to obtain a sealing property. The mating portion of the front casing 50 and the rear casing 60 is a contact portion between the front protrusion 53 and the rear protrusion 63.

  A guide pin (guide portion) 54 is formed on the vertical wall portion 50 a of the front casing 50 so as to protrude rearward from the front ridge portion 53. On the other hand, on the vertical wall portion 60 a of the rear casing 60, a cylindrical portion 64 that protrudes forward is formed below the rear protrusion 63. The cylindrical portion 64 is arranged so that the guide pin 54 is inserted. When the front casing 50 and the rear casing 60 are combined, the front casing 50 is moved to the rear by inserting the guide pin 54 into the cylindrical portion 64. The side casing 60 is guided to a predetermined assembly position. The vertical dimension of the guide pin 54 is set to be shorter than the vertical dimension of the inner hole of the cylindrical portion 64 so that a gap is formed between the outer surface of the guide pin 54 and the inner surface of the cylindrical portion 64. It has become.

  An air inlet 31 for introducing the air for air conditioning sent from the blower unit into the casing 30 is formed in the side wall portion of the front casing 50. A defroster port 32 and a vent port 33 are formed in the upper wall portion of the rear casing 60. A heat port 34 is formed in the rear wall portion of the rear casing 60.

  The defroster port 32 is connected to a defroster outlet of the instrument panel via a defroster duct (not shown), and is mainly for supplying conditioned air to the inner surface of the front window. The vent port 33 is connected to a vent outlet of the instrument panel via a vent duct (not shown), and is mainly for supplying conditioned air to the upper body of the occupant. The vent outlets are respectively provided on the left and right sides and the center of the instrument panel. The heat port 34 is for supplying conditioned air to a passenger's feet through a foot duct (not shown). The foot duct may extend not only to the front seat but also to the rear seat.

  Inside the casing 30, there are a cold air passage R1 connected to the air inlet 31, a hot air passage R2 that branches from the downstream end of the cold air passage R1 and extends downward, an upper side of the downstream end of the cold air passage R1, and hot air An air mix space R3 communicating with the downstream end of the passage R2, an upper passage R4 communicating with the air mix space R3 and extending upward, and a lower passage R5 communicating with the air mix space R3 and extending downward are formed. Yes.

  The cold air passage R <b> 1 extends from the front casing 50 to the rear casing 60. The evaporator 20 is disposed in the middle of the cold air passage R <b> 1, and the evaporator 20 generates cold air. The evaporator 20 constitutes a refrigerant evaporator of a refrigeration cycle apparatus, and is a tube-and-fin type heat exchanger having a plurality of tubes and fins. The evaporator 20 is disposed so that the tube extends in the vertical direction and crosses the cold air passage R1. Almost all of the air conditioning air introduced into the casing 30 passes through the evaporator 20.

  A drain portion 56 for draining the condensed water generated in the evaporator 20 is provided on the bottom wall portion of the front casing 50.

  The cool air passage R1 generates cool air when the compressor of the refrigeration cycle apparatus is operating, and does not generate cool air when the compressor is stopped. It will be called a cold air passage R1.

  The warm air passage R <b> 2 is formed in the lower half part in the rear casing 60. The upstream end of the warm air passage R <b> 2 is located in the middle in the vertical direction of the rear casing 60. The hot air passage R2 extends obliquely rearward toward the lower side of the rear casing 60 and then extends obliquely forward to the upper side so that the downstream side makes a U-turn. And the heater core 21 is arrange | positioned in the middle part of warm air path R2. The warm air passage R <b> 2 is a passage that generates warm air by the heater core 21. The heater core 21 circulates the cooling water of the engine of the automobile, and is a tube and fin type heat exchanger. The heater core 21 is disposed so as to cross the hot air passage R <b> 2, and substantially the entire amount of air flowing through the hot air passage R <b> 2 passes through the heater core 21. The heater core 21 is inclined so that the upper part is located on the rear side of the lower part. A heating heat exchanger other than the heater core 21 can also be used.

  An upper holding portion 27 that holds the upper portion of the heater core 21 is provided in the vicinity of the central portion in the vertical direction inside the rear casing 60. A partition wall 28 for partitioning the warm air passage R2 and the lower passage R5 is provided behind the upper holding portion 27 in the rear casing 60. The partition wall 28 extends upward from the rear side of the lower wall portion of the rear casing 60 and forms a downstream portion of the warm air passage R2 with respect to the heater core 21. The substantially lower half of the partition wall 28 is inclined so as to be located later as it goes upward, while the substantially upper half is inclined so as to be located forward as it goes upward. By forming the partition wall 28 in this way, the warm air after passing through the heater core 21 in the warm air passage R2 flows upward and obliquely forward.

  The downstream end opening 29 of the hot air passage R <b> 2 is located between the upper end portion of the partition wall 28 and the upper holding portion 27. The cross-sectional area of the downstream end opening 29 of the hot air passage R2 is narrower than the cross-sectional area of the portion where the heater core 21 is disposed, thereby restricting the downstream side of the hot air passage R2 and reducing the flow velocity of the hot air. It is increasing.

  The air mix space R3 is located above the warm air passage R2 in the rear casing 60 (above the upper holding portion 27), and is a space for mixing warm air and cold air to generate conditioned air. is there. The upper side of the partition wall 28 and the upper side of the upper holding part 27 is an air mix space R3.

  The upstream end opening 41 of the upper passage R4 communicates with the upper portion of the air mix space R3. The upper passage R4 extends upward, and the downstream side of the upper passage R4 branches in the front-rear direction. A defroster port 32 is formed on the front side downstream of the upper passage R4, and a vent port 33 is formed on the rear side.

  The upstream end opening 42 of the lower passage R5 communicates with the rear portion of the air mix space R3, and is located on the rear side of the upstream end opening 41 of the upper passage R4. That is, the upstream end opening 41 of the upper passage R4 and the upstream end opening 42 of the lower passage R5 are aligned in the front-rear direction. The lower passage R5 extends downward, and a heat port 34 is formed at the downstream end.

  The air mix damper 23 is for adjusting the temperature of the conditioned air by changing the amount of cold air and the amount of hot air flowing into the air mix space R3, and includes a rotation shaft 23a extending in the left-right direction and a rotation shaft 23a. And a closing plate portion 23b extending in the radial direction. Reference numeral 23d denotes a sealing material. The sealing material 23d is preferably a material that does not absorb water (for example, rubber), but urethane foam or the like may be used.

  The rotation shaft 23 a is supported so as to be rotatable around a center line extending in the left-right direction with respect to the side wall portion of the rear casing 60. An actuator (not shown) disposed outside the rear casing 60 is connected to the rotation shaft 23a. The actuator is controlled by an air conditioning control device (not shown), and the rotation angle of the air mix damper 23 is set according to the set temperature of the occupant, the outside air temperature, the inside air temperature, the amount of solar radiation, etc., and the actuator is operated so as to be the angle. It is configured to let you.

  Note that an operation wire may be connected to the rotation shaft 23a of the air mix damper 23 via a link, and the air mix damper 23 may be rotated by an occupant lever operation or dial operation.

  The rotation shaft 23 a of the air mix damper 23 is located in the vicinity of the front portion of the upper holding portion 27. The closing plate portion 23b swings in the vertical direction by the rotation of the rotation shaft 23a. A protruding plate 23c is provided on the distal end side of the closing plate portion 23b. When the blocking plate portion 23b swings upward, it closes the upper portion of the downstream end of the cold air passage R1 and opens the upstream end of the hot air passage R2. When the closing plate portion 23b closes the upper portion of the downstream end of the cold air passage R1, the cold air does not flow into the air mix space R3 from the cold air passage R1, and the cold air in the cold air passage R1 flows into the hot air passage R2 and is heated. Since it flows into air mix space R3, heating can be performed. On the other hand, when the blocking plate portion 23b swings downward, it closes the upstream end of the warm air passage R2 and opens the upper portion of the downstream end of the cold air passage R1. When the closing plate portion 23b closes the upstream end of the hot air passage R2, the cold air does not flow into the hot air passage R2 from the cold air passage R1, and the cold air in the cold air passage R1 flows into the air mix space R3. It can be performed. That is, the amount of cold air and the amount of hot air flowing into the air mix space R3 are changed according to the rotation angle of the air mix damper 23.

  The closing plate portion 23b of the air mix damper 23 is rotated downward, and a joint portion of the front casing 50 and the rear casing 60, that is, a contact portion between the front protrusion 53 and the rear protrusion 63 is provided. It arrange | positions so that it may cover from upper direction (inside of the casing 30). That is, an extension portion 23e for covering the mating portion of the front casing 50 and the rear casing 60 is formed at the distal end portion of the closing plate portion 23b so as to extend in a direction away from the rotation shaft 25a. The extending portion 23e is bent with respect to the main body portion of the closing plate portion 23b so as to be positioned downward as it goes to the distal end side.

  In a state where the air mix damper 23 is rotated downward, the tip end portion of the extending portion 23 e protrudes rearward from the opening of the rear wall portion of the rear casing 60. A separation dimension B1 between the distal end surface of the rear ridge 63 of the rear casing 60 and the distal end of the extension 23e of the air mix damper 23 is set to be shorter than the projection dimension B2 of the guide pin 54.

  In addition, the separation dimension C1 between the front end portion of the extension portion 23e of the air mix damper 23 and the opening edge portion of the rear wall portion of the front casing 50 is the vertical dimension of the guide pin 54 and the inner hole of the cylindrical portion 64. Is set to be larger than the difference C2 in the vertical direction.

  On the other hand, in a state where the air mix damper 23 is rotated upward, the extending portion 23e is positioned so as to approach the upper wall portion of the rear casing 60 together with the protruding plate 23c. Thereby, when the air mix damper 23 is at the upper rotation limit, it is possible to prevent the cool air in the cool air passage R1 from directly flowing into the air mix space R3, so that the temperature controllability is improved. Can do.

  The heat damper 25 is a rotary damper, and includes a rotating shaft 25a, a blocking wall portion 25b, and a plate-like portion 25c for guiding air. Reference numeral 25d denotes a sealing material similar to the sealing material of the air mix damper 23.

  The rotation shaft 25a extends in the left-right direction and is supported by the side wall portion of the casing 30 so as to be rotatable. The blocking wall portion 13e may be in a state where one of the upstream end opening 41 of the upper passage R4 and the upstream end opening 42 of the lower passage R5 is closed and the other is opened, or both are opened. It can be done.

  When the upstream end opening 41 of the upper passage R4 is opened and the upstream end opening 42 of the lower passage R5 is closed, a blowing mode in which conditioned air mainly flows to the upper passage R4 is set. In this blowing mode, the conditioned air may be slightly leaked into the lower passage R5, or the entire amount may be allowed to flow into the upper passage R4.

  On the other hand, although not shown, when the upstream end opening 41 of the upper passage R4 is closed and the upstream end opening 42 of the lower passage R5 is opened, a blow-out mode in which conditioned air flows to the lower passage R5 is set. Further, when both the upstream end opening 41 of the upper passage R4 and the upstream end opening 42 of the lower passage R5 are opened, a blow mode is set in which conditioned air flows to the upper passage R4 and the lower passage R5.

  The plate-like portion 25c is arranged as follows. When the heat damper 25 is in a blowing mode in which conditioned air flows to the upper passage R4 and the lower passage R5, the plate-like portion 25c is located near the downstream end of the hot air passage R2 from the cold air introduction side (front side) of the air mix space R3. Extending towards. At this time, the rear edge portion of the plate-like portion 25c is located in the vicinity of the upper end portion of the partition wall 28, and the partition wall 28 and the plate-like portion 25c are substantially continuous to form one plate shape.

  On the other hand, when the heat damper 25 is in the blowing mode in which conditioned air flows to the upper passage R4, the plate-like portion 25c extends toward the upper passage R4. At this time, the rear portion of the plate-like portion 25c is located below the downstream end opening 29 of the hot air passage R2, that is, in a state of being accommodated in the hot air passage R2.

  The differential / vent switching damper 24 is for switching the blowing mode by closing one of the defroster port 32 and the vent port 33 and opening the other, and includes a rotation shaft 24a extending in the left-right direction and a rotation shaft 24a. And a closing plate portion 24b extending in the radial direction. Reference numeral 24c is a sealing material made of foamed urethane or the like. The rotation shaft 24 a is supported so as to be rotatable around a center line extending in the left-right direction with respect to the side wall portion of the rear casing 60. A link mechanism disposed outside the rear casing 60 is connected to the rotation shaft 24a. The link mechanism is also connected to the rotating shaft 25a of the heat damper 25 so that the heat damper 25 and the differential / vent switching damper 24 can be interlocked via the link mechanism. The heat damper 25 and the differential / vent switching damper 24 may be operated by an actuator, or may be operated by an occupant operating an operation wire.

  The movement of the heat damper 25 and the differential / vent switching damper 24 can be set according to the shape of the cam of a known link mechanism. In this embodiment, the heat damper 25 closes the lower passage R5, the differential / vent switching damper 24 closes the defroster port 32, the heat damper 25 opens the upper passage R4 and the lower passage R5, and the differential / vent switching damper 24 Is the differential / foot mode in which the vent port 33 is closed, the heat damper 25 opens the upper passage R4 and the lower passage R5, the differential / vent switching damper 24 closes the defroster port 32, and the heat damper 25 closes the lower passage R5. The differential / vent switching damper 24 can be switched to a blowing mode such as a defroster mode in which the vent port 33 is closed, and the heat damper 25 in a foot mode in which the upper passage R4 is closed.

  Next, the case where the front casing 50 and the rear casing 60 of the vehicle air conditioner 1 are assembled will be described. The evaporator 20 is accommodated in the front casing 50 in advance, and the heater core 21, the air mix damper 23, the differential / vent switching damper 24, and the heat damper 25 are accommodated in the rear casing 60.

  For example, when the rear casing 60 is fixed and the front casing 50 is assembled by moving from the front to the rear of the rear casing 60, the guide pins 54 of the front casing 50 are inserted into the cylindrical portion 64 of the rear casing 60. . At this time, the separation dimension B1 between the front end surface of the rear ridge 63 of the rear casing 60 and the front end of the extension 23e of the air mix damper 23 is set shorter than the protrusion B2 of the guide pin 54. Therefore, even if the front casing 50 and the rear casing 60 are slightly displaced in the vertical direction, before the tip of the extending portion 23e of the air mix damper 23 contacts the front protrusion 53 of the front casing 50, The guide pin 54 enters the cylindrical portion 64 and the positional deviation between the front casing 50 and the rear casing 60 is corrected. Thereby, it can prevent that the front-end | tip part of the extension part 23e of the air mix damper 23 contacts the front side protrusion 53 of the front casing 50. FIG.

  Further, the separation dimension C1 between the distal end portion of the extension portion 23e of the air mix damper 23 and the opening edge portion of the rear wall portion of the front casing 50 is the vertical dimension of the guide pin 54 and the inner hole of the cylindrical portion 64. Is set larger than the difference C2 in the vertical direction, even if the front casing 50 and the rear casing 60 are slightly displaced in the vertical direction, by inserting the guide pin 54 into the cylindrical portion 64, It can prevent that the front-end | tip part of the extension part 23e of the air mix damper 23 contacts the front side protrusion 53 of the front casing 50. FIG.

  Next, operation | movement of the vehicle air conditioner 1 comprised as mentioned above is demonstrated. Air conditioning air blown from the blower unit flows into the cool air passage R <b> 1 from the air inlet 31 of the air conditioning unit 10 and passes through the evaporator 20. Since the air for air conditioning is cooled when passing through the evaporator 20, condensed water is generated on the surfaces of the tubes and fins of the evaporator 20. At this time, if the air flow rate is small, most of the condensed water flows downward through the tube etc. and is drained from the drain part 56. Immediately after switching from the small air volume to the large air volume, the code A in FIG. As shown, the condensed water retained in the fins and the like of the evaporator 20 when the air volume is small may be blown to the rear side by the flow of air conditioning air.

  At this time, in the state where the air mix damper 23 is rotated downward, the joint portion of the front casing 50 and the rear casing 60 is covered from above by the extending portion 23e. Then, it adheres to the upper surface of the extending portion 23e. Therefore, since the condensed water A does not easily adhere to the joining portion of the front casing 50 and the rear casing 60, the sealing material disposed between the front casing 50 and the rear casing 60 does not have to be so expensive. The condensed water A can be prevented from leaking outside the casing 30.

  The condensed water A adhering to the upper surface of the extending portion 23e is smoothly drained from the upper surface of the extending portion 23e because the extending portion 23e is bent downward with respect to the main body portion of the closing plate portion 23b. It drops on the inclined wall portion 50b of the casing 50. The condensed water A dripped onto the inclined wall portion 50 b is guided into the front casing 50 by the inclined wall portion 50 b and drained from the drain portion 56.

  In a state where the air mix damper 23 is rotated downward, almost all of the cool air in the cool air passage R1 flows into the air mix space R3 and corresponds to the blowing mode set by opening / closing the differential / vent switching damper 24 and the heat damper 25. It is supplied to each part of the passenger compartment.

  On the other hand, in a state in which the air mix damper 23 is rotated upward, almost all of the cold air in the cold air passage R1 flows into the hot air passage R2 and is heated, and then flows into the air mix space R3 and enters each part of the passenger compartment. Supplied. In this case, the extending portion 23e of the air mix damper 23 is separated upward from the mating portion of the front casing 50 and the rear casing 60, but the air mix damper 23 is in a state of rotating upward. It is a time when heating is necessary mainly in winter and when the humidity of the air-conditioning air to be introduced is low. Accordingly, since the amount of condensed water retained in the evaporator 20 is small, the amount of condensed water flying from the evaporator 20 is small even when the amount of air is large, and leakage from the joint portion of the front casing 50 and the rear casing 60 does not occur. Almost no.

  In addition, when the air mix damper 23 is at an intermediate position in the vertical direction, the extending portion 23e is separated from the mating portion of the front casing 50 and the rear casing 60, but is positioned above the mating portion. The flying condensed water A can be received by the extending portion 23e, and leakage from the mating portion of the front casing 50 and the rear casing 60 can be suppressed.

  As described above, according to the vehicle air conditioner 1 according to this embodiment, the air mix damper 23 covers the mating portion of the front casing 50 and the rear casing 60 that form the casing 30 from the inside of the casing 30. I have to. Thereby, when the condensed water of the evaporator 20 is blown toward the mating part of the front casing 50 and the rear casing 60, the condensed water is difficult to adhere to the mating part of the front casing 50 and the rear casing 60, Leakage outside the casing 30 can be suppressed.

  Further, since the mating portion of the front casing 50 and the rear casing 60 is located below the closing plate portion 23 b of the air mix damper 23, it jumps from above to the mating portion of the front casing 50 and the rear casing 60. It is possible to prevent the condensed water coming from adhering to the mating part.

  In addition, the air mix damper 23 that increases the amount of cool air flowing into the air mix space R3 by rotating downward can cover the mating portion of the front casing 50 and the rear casing 60 from above, so that it is condensed during cooling. Even if the amount of water increases, it is possible to prevent condensed water from adhering to the mating portion.

  Further, when the front casing 50 and the rear casing 60 are combined, they can be guided by the guide pins 54, so that when the extending portion 23 e of the air mix damper 23 protrudes from the rear casing 60, the front casing 50 Can be prevented.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the vehicle air conditioner according to the present invention can be mounted on, for example, an automobile.

1 Vehicle air conditioner 20 Evaporator (cooling heat exchanger)
21 Heater core (heat exchanger for heating)
23 Air Mix Damper (Damper)
24 differential / vent switching damper 25 heat damper 30 casing 50 front casing 54 guide pin (guide section)
60 Rear casing 64 Tube portion

Claims (4)

A heat exchanger for cooling;
A casing for housing the cooling heat exchanger;
A damper housed in the casing,
In a vehicle air conditioner configured to introduce air for air conditioning into the casing and pass through the cooling heat exchanger,
The casing is configured by combining a plurality of members,
The vehicular air conditioner is characterized in that the damper is configured to cover a mating portion of members constituting the casing from the inside of the casing. In the vehicle air conditioner according to claim 1,
The damper has a pivot shaft supported by the casing so as to be pivotable in the vertical direction, and a closing plate portion extending in a radial direction from the pivot shaft,
An air conditioner for a vehicle, wherein a mating portion of the casing is located below the closing plate portion. In the vehicle air conditioner according to claim 2,
Equipped with a heat exchanger for heating,
The said casing combines the 1st casing which accommodates the heat exchanger for cooling, and the 2nd casing in which the heat exchanger for heating is accommodated, and the air for an air conditioning is introduce | transduced into the 1st casing, and is supplied to a 2nd casing. Inflow,
Connected to the inside of the casing are a cold air passage in which the cooling heat exchanger is disposed, a hot air passage in which the heating heat exchanger is disposed, and the downstream ends of the cold air passage and the hot air passage. Air mix space is formed,
The damper is an air mix damper that changes the amount of cold air flowing into the air mix space from the cold air passage, and the amount of cold air flowing into the air mix space is increased by rotating downward. Vehicle air conditioner. In the vehicle air conditioner according to any one of claims 1 to 3,
The damper is provided with an extending portion that extends so as to cover the mating portion of the members constituting the casing,
One of the first casing and the second casing constituting the casing is provided with a guide portion that guides the other casing relative to one casing when the two casings are combined. .

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