JP2013159267A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular air conditioner which can be downsized.SOLUTION: A vehicular air conditioner 1 includes: an air inlet port 3; an air outlet port 4; a casing 2 having an air passage 5 communicating the air inlet port 3 and the air outlet port 4; and an evaporator 6 that is disposed within the air passage 5 of the casing 2. The air passage 5 has a first portion 7 communicated to the air inlet port 3, a second portion 8 in which air flows in a direction forming a fixed angle with an air flowing direction in the first portion 7 and which is communicated to the air outlet port 4, and a communicating portion 9 provided at a position where an extension portion of the first portion 7 at a downstream side in the air flowing direction crosses an extension portion of the second portion 8 at an upstream side in the air flowing direction. The evaporator 6 is disposed in the communicating portion 9 within the air passage 5. The evaporator 6 includes a ventilation gap in which air flowing through the first portion 7 may flow to a side of the second portion 8.

Description

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

   Conventionally, as a vehicle air conditioner (21), as shown in FIG. 4, air introduced through an air inlet (23), an air outlet (24), and an air inlet (23) and an air outlet (24). A casing (22) having a passage (25), and an evaporator (26) disposed in the air passage (25) of the casing (22) and constituting a refrigeration cycle, and the air passage ( 25), the first part (27) whose upstream end is connected to the air inlet (23), and the air flows in a direction perpendicular to the air flow direction in the first part (27), and A second part (28) whose side end is connected to the air outlet (24), an extension part on the downstream side in the air flow direction of the first part (27) and an extension on the upstream side in the air flow direction of the second part (28) The second portion (28) is provided at a location where the portion intersects, and the first portion (27) and the second portion (28) are passed through and the flow direction of the air flowing through the first portion (27) is changed. ) The air inlet (23) of the casing (22) is connected to the outlet of the blower (30), and the evaporator (26) is the second part of the air passage (25). It is arranged in the upstream part of (28), and the evaporator (26) has a ventilation gap through which air passes in a direction parallel to the air flow direction in the second part (28). (See Patent Document 1).

  However, in the vehicle air conditioner (21) described in Patent Document 1, since the evaporator (26) is disposed in the second portion (28) of the air passage (25) of the casing (22), the communication portion (29 ), The distance d from the side surface (29a) opposite to the second portion (28) to the end of the second portion (28) on the air outlet (24) side becomes relatively long, and the vehicle air conditioner (21 ) Is relatively large.

  Conventionally, downsizing of a vehicle air conditioner has been dealt with by narrowing the width of the evaporator in the ventilation direction. However, it is difficult to further reduce the width of the vehicle while ensuring the performance of the evaporator.

JP 2002-144848 A

  An object of the present invention is to provide a vehicle air conditioner that can solve the above problems and can be reduced in size as compared with the vehicle air conditioner described in Patent Document 1.

  In order to achieve the above object, the present invention comprises the following aspects.

1) A vehicle air conditioner comprising a casing having an air introduction port, an air delivery port, and an air passage through which the air introduction port and the air delivery port pass, and an evaporator disposed in the air passage of the casing and constituting a refrigeration cycle A device,
The air passage of the casing has a first portion whose upstream end is connected to the air inlet, air flows in a direction that forms a certain angle with the air flow direction in the first portion, and the downstream end is air. The second part connected to the delivery port, the first part in the air flow direction downstream extension part and the second part in the air flow direction upstream extension part intersect each other, and the first part and the second part. And a communication portion that changes the flow direction of the air flowing through the first portion and flows into the second portion, and the evaporator is disposed in the communication portion in the air passage, and the evaporator has the first portion The vehicle air conditioner provided with the ventilation gap which can flow the air which has flowed to the 2nd part side.

  2) The evaporator is provided with a heat exchange tube provided in a staggered arrangement in a horizontal section with the longitudinal direction oriented in the vertical direction, and fins joined to the heat exchange tube. The vehicle air conditioner according to 1) above, wherein a ventilation gap is provided between the exchange pipes so that the air flowing through the first portion can flow toward the second portion.

  3) The wall constituting the communicating portion of the casing prevents air from escaping from the portion of the evaporator opposite to the first portion and the portion opposite to the second portion. The vehicle air conditioner according to 1) or 2) above, wherein a ventilation gap is provided to allow air flowing through one part to flow toward the second part.

  According to the vehicle air conditioner of 1) to 3) above, the air passage of the casing includes the first part whose upstream end is connected to the air inlet, and the air flow direction in the first part at a certain angle. A second portion in which air flows in a direction in which the downstream end is connected to the air outlet, a downstream extension portion of the first portion in the air flow direction, and an upstream extension portion of the second portion in the air flow direction. And a communication portion that passes through the first portion and the second portion and changes the flow direction of the air that has flown through the first portion and flows into the second portion. Since the evaporator is provided with a ventilation gap through which the air flowing through the first part can flow to the second part side, the length of the second part of the air passage in the air flow direction is arranged in the communication part in the passage. Of the air passage of the vehicle air conditioner described in Patent Document 1. It can be made shorter than the length of the second portion in the air flow direction. Therefore, the distance from the side surface opposite to the second portion in the communicating portion of the air passage to the air outlet of the second portion can be reduced as compared with the vehicle air conditioner described in Patent Document 1, The air conditioner can be downsized.

1 is a horizontal sectional view schematically showing a vehicle air conditioner according to the present invention. It is a front view which shows the evaporator used for the vehicle air conditioner of FIG. It is the sectional view on the AA line of FIG. It is a horizontal sectional view which shows the conventional vehicle air conditioner schematically.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the following description, the term “aluminum” includes aluminum alloys in addition to pure aluminum. In the following description, the upper side of FIG. 1 is referred to as the front, the opposite side is referred to as the rear, the front side of the paper (upper side in FIG. 2) in FIG. 1 is referred to as the upper side, and the opposite side is referred to as the lower side. Furthermore, the left and right in FIGS.

  FIG. 1 schematically shows a vehicle air conditioner according to the present invention, and FIGS. 2 and 3 show an evaporator used in a vehicle air conditioner.

  In FIG. 1, the vehicle air conditioner (1) has an air inlet (3), an air outlet (4), and an air passage (5) through which the air inlet (3) and the air outlet (4) pass. A plastic casing (2), and an evaporator (6) disposed in an air passage (3) of the casing (2) and constituting a refrigeration cycle together with a compressor, a refrigerant cooler (condenser), a decompressor, and the like It has.

  The air passage (5) of the casing (2) has a first portion (7) in which the upstream end (left end) is connected to the air inlet (3) and air flows to the right from the air inlet (3). Then, the air flows in a direction that forms a certain angle with the air flow direction in the first portion (7), in this case, a direction (front) that forms a right angle (including a state close to a right angle), and the downstream end is air. The second part (8) connected to the delivery port (4), the downstream part (right side) of the first part (7) in the air flow direction and the upstream part (rear side) of the second part (8) in the air flow direction ) The second part is provided at a place where the extension part intersects, and the second part is changed through the first part (7) and the second part (8) and the flow direction of the air flowing through the first part (7) is changed. And a communication portion (9) that flows into (8).

  The air introduction port (3) of the casing (2) is connected to the discharge port of the blower (10) of the blower unit. Although not shown, as is well known, the air delivery port (4) of the second part (8) of the air passage (5) of the casing (2) blows air to each part in the passenger compartment. It is connected to the air outlet formed in the casing (2), and the air outlet that blows out air can be switched by the air outlet position switching device. Further, a heater core is also arranged in the air passage (5) of the casing (2), and the temperature blown out from the outlet is adjusted by an appropriate means.

  As shown in FIGS. 2 and 3, the evaporator (6) is disposed in the communication portion (9) of the air passage (5) of the casing (2). The evaporator (6) has a pair of aluminum header tanks (11), (12) spaced apart in the vertical direction, and a staggered arrangement in the horizontal section with the longitudinal direction facing the vertical direction. Between the upper and lower header tanks (11) and (12) and the upper and lower header tanks (11) and (12). And a plurality of aluminum plate-like fins (14) which are horizontally arranged at intervals and brazed in a heat-exchange pipe (13) in a penetrating state. And the escape of air from the right side part (the part opposite to the first part (7)) and the rear part (the part opposite to the second part (8)) of the evaporator (6) is prevented. As a result, the air flowing through the first portion (7) can flow to the second portion (8) side between the adjacent plate-like fins (14) and between the adjacent heat exchange tubes (13). A ventilation gap (15) is provided. Here, the width in the front-rear direction of the evaporator (6) is substantially equal to the width in the front-rear direction of the communication portion (9), and the width in the left-right direction is also substantially equal to the width in the left-right direction of the communication portion (9). The escape of air from the right side portion and the rear side portion of the evaporator (6) is prevented directly by the right side wall and the rear side wall of the communicating portion (9) of the casing (2), or It is indirectly prevented through other members.

  Here, the length of the second portion (8) of the air passage (5) in the air flow direction is set to the length of the second portion (28) of the air passage (25) of the vehicle air conditioner (21) shown in FIG. Since it can be shorter than the length in the air flow direction, the second portion (8) can be removed from the side (rear) side opposite to the second portion (8) in the communicating portion (9) of the air passage (5). The distance D to the end of the air delivery port (4) is set to the second part from the side (rear) side opposite to the second part (8) in the communicating part of the vehicle air conditioner (20) shown in FIG. It becomes possible to make it shorter than the distance d to the air delivery port (4) side end of (8), and the vehicle air conditioner (1) can be miniaturized.

  Although not shown, a refrigerant inlet is formed in one of the upper and lower header tanks (11) and (12) of the evaporator (6), and a refrigerant outlet is formed in the other header tank, The refrigerant flowing in from the refrigerant inlet flows out of the refrigerant outlet through all the heat exchange tubes (13).

  In the vehicle air conditioner (1) described above, air is sent into the first portion (7) of the air passage (3) of the casing (2) through the air inlet (3) by the blower (10). The air sent into the first part (7) flows to the right through the first part (7), enters the communicating part (9), and passes through the ventilation gap (15) of the evaporator (6). Change direction and flow into the second part (8). When the air passes through the ventilation gap (15) of the evaporator (6), it is cooled by exchanging heat with the refrigerant flowing in the heat exchange pipe (13).

  The cooled air flowing into the second portion (8) of the air passage (3) of the casing (2) flows forward in the second portion (8), passes through the air outlet (4), and passes through the casing (2 ) Is blown out from the outlet formed in each part of the passenger compartment.

  The evaporator (6) used in the vehicle air conditioner according to the present invention is not limited to the one shown in FIGS.

  The vehicle air conditioner according to the present invention is suitably mounted on an automobile as a car air conditioner.

(1): Vehicle air conditioner
(2): Casing
(3): Air inlet
(4): Air outlet
(5): Air passage
(6): Evaporator
(7): 1st part
(8): Second part
(9): Communication part
(13): Heat exchange pipe
(14): Plate-shaped fin
(15): Ventilation gap

Claims (3)

A vehicle air conditioner comprising an air inlet, an air outlet, a casing having an air passage through the air inlet and the air outlet, and an evaporator disposed in the air passage of the casing and constituting a refrigeration cycle. There,
The air passage of the casing has a first portion whose upstream end is connected to the air inlet, air flows in a direction that forms a certain angle with the air flow direction in the first portion, and the downstream end is air. The second part connected to the delivery port, the first part in the air flow direction downstream extension part and the second part in the air flow direction upstream extension part intersect each other, and the first part and the second part. And a communication portion that changes the flow direction of the air flowing through the first portion and flows into the second portion, and the evaporator is disposed in the communication portion in the air passage, and the evaporator has the first portion The vehicle air conditioner provided with the ventilation gap which can flow the air which has flowed to the 2nd part side. The evaporator is provided with a heat exchange pipe provided in a staggered arrangement in a horizontal section with the longitudinal direction directed in the vertical direction, and fins joined to the heat exchange pipe, and adjacent heat exchange pipes The vehicle air conditioner according to claim 1, wherein a ventilation gap is provided between the two portions so that the air flowing through the first portion can flow toward the second portion. The wall constituting the communication portion of the casing prevents air from escaping from the portion of the evaporator opposite to the first portion and the portion opposite to the second portion, whereby the evaporator has the first portion The air conditioner for vehicles according to claim 1 or 2 provided with the ventilation gap which can flow the air which has flowed into the 2nd part side.

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