JP4624773B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner disposed in a vehicle interior, and in particular, introduces air for air conditioning into an air conditioning unit that houses a heat exchanger for cooling and a heat exchanger for heating, and performs the heat exchange for cooling. It belongs to the technical field of a structure in which conditioned air is generated by a heater and a heat exchanger for heating.

  In general, a vehicle air conditioner that includes two heat exchangers for cooling and heating is used. In such a vehicle air conditioner, air-conditioning air is introduced into a cooling passage in which a cooling heat exchanger is arranged, the downstream end of the cooling passage is branched into two, and a heating heat exchanger is provided at one opening. Is connected, the other opening is connected to the air mix space, and the downstream end of the heating passage is connected to the air mix space. And it is generated in the air mix space by changing the ratio of the amount of cold air flowing into the air mix space from the other opening of the cooling passage to the air mix space by the temperature control door. The temperature of the conditioned air to be set is set.

  When the conditioned air is generated by mixing the cold air and the hot air in the air mix space as described above, the hot air passes through the two heat exchangers for cooling and heating, and the cooling passage and the heating passage. The air mix space is reached through the two passages. As a result, when hot air flows into the air mix space, the flow velocity drops and the momentum is weakened. On the other hand, since the cold air bypasses the heating passage and reaches the air mix space, when flowing into the air mix space, the flow velocity is higher than that of the hot air. When the cool air with this momentum and the warm air with weak momentum flow into the air mix space, the flow of the hot air cannot enter the flow of the cool air, and the hot air is pushed to both sides of the air mix space in the width direction. End up. If it becomes like this, cold air and warm air will not mix well in an air mix space, and the blowing temperature of conditioned air will become non-uniform | heterogenous about the width direction of an outlet, and comfortable air conditioning cannot be implement | achieved.

As a vehicle air conditioner that suppresses this, for example, in Patent Document 1, a warm air guide plate that extends to both sides in the width direction is disposed at the center in the width direction of the air mix space. A structure that actively guides the flow to the center in the width direction of the air mix space is disclosed. With this structure, it is possible to mix the warm air and the cool air well by allowing the warm air flow to enter the cool air flow in the air mix space.
JP 2004-106605 A (Page 7, FIGS. 3 and 4)

  However, in the air conditioner of Patent Document 1, since the hot air guide plate extends in the width direction of the air mix space at the center in the width direction of the air mix space, the flow of cold air flowing into the air mix space and the flow of hot air The flow will collide with the hot air guide plate. Therefore, for example, in the full cold mode or defroster mode where a large air flow is required, the hot air guide plate becomes a large obstacle against the flow of cold air or hot air, so the draft resistance is greatly increased and the desired air flow is increased. The air conditioning capacity will be insufficient.

  The present invention has been made in view of such a point, and an object thereof is a vehicle configured to generate conditioned air by flowing cold air and hot air into an air mix space and mixing them. The purpose of the present invention is to equalize the temperature of the conditioned air blown out from the outlet through a good mixing of the cool air and the hot air without greatly increasing the resistance of the cool air and the hot air.

  In order to achieve the above object, according to the first aspect of the present invention, the heating passage is provided with a constricted portion protruding from the side wall, and the force of the warm air flowing through the heating passage is increased by the constricted portion, and the flow of the warm air is changed to the heating passage. It was made to point to the center of the width direction.

  Specifically, in the first aspect of the invention, a cooling heat exchanger and a casing containing the heating heat exchanger are provided, and air-conditioning air is introduced into the casing from an inlet formed in the casing. A vehicle air conditioner configured to generate conditioned air by a cooling heat exchanger and a heating heat exchanger and supply the conditioned air to a passenger compartment from an outlet formed in a casing.

The casing is connected to the inlet and extends downstream in the air flow direction. The cooling heat exchanger is disposed in the middle of the casing, and a first opening and a second opening are provided at the downstream end. A cooling passage through which the air that has passed through the cooling heat exchanger flows toward the first opening and the second opening, and is connected to the first opening of the cooling passage and extends downstream in the air flow direction. The heating heat exchanger is arranged in the middle, and the heating passage through which the air that has passed through the heating heat exchanger flows, the second opening of the cooling passage, the downstream end of the heating passage, and the outlet are connected. An air mix space that introduces and mixes cold air and hot air blown out from the downstream end of the second opening and the heating passage to generate conditioned air and guides the conditioned air to the outlet, and the second opening From the air into the air mix space The amount and the temperature control door for changing the ratio of the warm air quantity flowing into the air mixing space from the downstream end of the heating passage, the first air flow direction downstream of the opening of the cooling passage, and the air Projecting from the side wall of the heating passage toward the center in the width direction of the heating passage on the upstream side of the mixing space , for narrowing the heating passage and directing hot air toward the center in the width direction of the heating passage It is set as the structure provided with the aperture part.

  According to this configuration, when the temperature adjustment door is at an opening degree at which the cool air and the warm air respectively flow into the air mix space from the second opening of the cooling passage and the downstream end of the heating passage, the air-conditioning air is supplied to the cooling passage. After passing through the cooling heat exchanger, some cool air bypasses the heating passage and flows into the air mix space from the second opening. For this reason, the momentum of the cold air flowing into the air mix space is relatively strong.

  On the other hand, after the cold air that has passed through the cooling heat exchanger, the other cold air flows into the heating passage from the first opening, and then passes through the heating heat exchanger. The warm air flowing through the heating passage has a higher flow velocity when passing through the portion where the throttle portion is formed. Furthermore, since the throttle portion has a shape protruding from the side wall of the heating passage, the flow of warm air in the heating passage is directed to the center portion in the width direction of the heating passage. In other words, the warm air flowing into the air mix space has increased momentum, and the flow is directed to the center in the width direction of the air mix space. Therefore, it becomes possible to allow the flow of hot air to enter the flow of cold air in the air mix space, and the temperature of the conditioned air that is well mixed in the air mix space and blown out from the outlet. Becomes substantially uniform in the width direction.

  And since the said narrowing part is formed in the side wall, compared with the case where the plate-shaped thing extended in the width direction is arrange | positioned in the width direction center part of air mix space conventionally, the ventilation resistance of a warm air is provided. Becomes smaller. Furthermore, since the throttle part is provided in the heating passage, the flow of the cold air is not greatly hindered by the throttle part. By these things, it becomes possible to obtain a large air volume easily at the time of the full cold mode or the defroster mode.

  According to a second aspect of the present invention, in the first aspect of the present invention, the throttle portion is formed integrally with the casing.

According to this configuration, an increase in the number of parts due to the provision of the throttle portion is avoided .

  According to the first aspect of the present invention, the force of the hot air is increased by the throttle portion formed on the side wall of the heating passage, and the flow of the hot air is directed to the central portion in the width direction of the air mix space. Hot air and cold air can be well mixed in the mix space, and the temperature of the conditioned air blown out from the outlet can be made substantially uniform in the width direction. And since the above-mentioned throttle part has a shape protruding from the side wall of the heating passage, the draft resistance of the hot air is smaller than the conventional one, and the throttle part does not greatly hinder the flow of the cold air. The desired air volume can be easily obtained and the air conditioning capacity can be increased.

According to the second aspect of the present invention, since the throttle part is integrally formed with the casing, an increase in the number of parts due to the provision of the throttle part can be avoided, and the cost can be reduced .

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 3 shows a vehicle air conditioner 1 according to the first embodiment of the present invention, and this air conditioner 1 is arranged in an instrument panel 2 provided in the front part of the interior of an automobile as shown in FIG. Has been. This automobile is a so-called right-hand drive vehicle in which a driver's seat and a passenger seat are provided on the right and left sides of the vehicle, respectively. In the description of this embodiment, for convenience of explanation, the left side in the vehicle width direction is simply referred to as “left”, and the right side in the vehicle width direction is simply referred to as “right”.

  The air conditioner 1 includes a blower unit 3 that blows air for air conditioning, an air conditioner unit 4 that introduces air blown from the blower unit 3 into conditioned air, and a blower unit 3 that blows air to the air conditioner unit 4. And an intermediate duct 5 for sending air for air conditioning.

  The air conditioning unit 4 is disposed at a substantially central portion in the left-right direction in the instrument panel 2, while the air blowing unit 3 is disposed in front of the passenger seat while being spaced apart to the left with respect to the air conditioning unit 4. . Further, the lower end of the blower unit 3 is positioned above the lower end of the air conditioning unit 4 so as to ensure a wide foot space for the passenger on the passenger seat.

  The blower unit 3 includes a casing 6 that is divided into two in the left-right direction at a substantially central portion in the left-right direction, and these are integrated using fasteners or the like. The upper half of the casing 6 is used as an air intake 7 for taking in air for air conditioning into the blower unit 3, while the remaining part is used for blowing air into the air conditioning unit 4. Part 8.

  An air intake 10 for taking in air outside the passenger compartment and an air inlet 11 for taking in air inside the passenger compartment are formed in the upper part of the air intake portion 7. One of the intake ports 10 and 11 is closed by an inside / outside air switching door (not shown) operated by an actuator 15 disposed on the right side wall portion of the casing 6, while the other is opened. It is supposed to be in a state. In other words, when the outside air intake 10 is fully opened by the inside / outside air switching door, the inside air intake 10 is fully closed, and the outside air intake mode for taking in only the air outside the passenger compartment is set. On the other hand, when the outside air inlet 10 is fully closed, the inside air inlet 11 is fully opened, and the inside air circulation mode for taking in only the air in the passenger compartment is set. Note that a grid-like grill 13 is provided at the inside air inlet 11.

  On the other hand, as shown in FIG. 4, a filter disposition portion in which a filter 20 for filtering air taken in from the outside air intake port 10 or the internal air intake port 11 is disposed at the lower portion of the air intake portion 7. 21 is provided. A centrifugal multi-blade fan 23 is disposed below the filter disposition portion 21 with its rotational axis directed in the vertical direction. Further, below the fan 23, the fan 23 is driven. The fan drive motor 24 is disposed. In addition, the arrow in FIG. 4 has shown the flow of air.

  The left end portion of the intermediate duct 5 is fixed to the right side wall portion of the casing 6 in the air blowing portion 8, and the left end portion of the intermediate duct 5 is connected to the inside of the casing 6 through an opening formed in the right side wall portion of the casing 6. Communicate. The intermediate duct 5 is formed to extend obliquely downward from the left end portion toward the lower end portion of the air conditioning unit 4. The right end of the intermediate duct 5 is opened at the lower end of the casing 6 of the air conditioning unit 4 and connected to an inlet 25 (shown in phantom lines in FIG. 1) for introducing air for air conditioning into the casing 6. Yes. A control circuit 26 for controlling the rotational speed of the fan drive motor 24 is disposed on the upper wall of the intermediate duct 5, and this control circuit 26 projects into the intermediate duct 5.

  The casing 30 of the air conditioning unit 4 is long in the vertical direction as a whole, and is larger than the casing 6 of the blower unit 3. As shown in FIG. 3, the casing 30 of the air conditioning unit 4 is divided into two in the left-right direction, like the casing 6 of the blower unit 3, and includes a driver seat side portion 32 a and a passenger seat side portion 32 b. Yes. The driver seat side portion 32a and the passenger seat side portion 32b are fastened to each other by screws at a plurality of fastening portions 30a (shown only in FIG. 3) provided in a state of protruding to the outside of the casing 30.

  As shown in FIG. 5, the introduction port 25 is formed in the assistant side 32b. The lower edge portion of the introduction port 25 extends substantially horizontally in the vehicle front-rear direction, while the upper edge portion extends so as to be positioned on the lower side toward the vehicle front side. A cooling passage 33 extending from the introduction port 25 to the substantially vertical center of the casing 30 is provided in the casing 30, and the air-conditioning air introduced from the introduction port 25 is directed upward in the casing 30. Change and start flowing. The width direction of the cooling passage 33, that is, the center portion in the left-right direction, and the center portion in the left-right direction of the casing 30 substantially coincide with each other.

  In the middle of the cooling passage 33 in the vertical direction, an evaporator 34 as a cooling heat exchanger that cools the air-conditioning air flowing through the cooling passage 33 through the cooling passage 33 is disposed across the cooling passage 33. . The evaporator 34 constitutes one element of the refrigeration cycle, and although not shown in the figure, for example, a large number of tubes formed of a thin metal plate such as aluminum are laminated so as to extend in the same direction, and adjacent tubes are stacked. In addition, corrugated fins formed of a thin metal plate are also interposed. A low-temperature refrigerant circulates in the tube of the evaporator 34, and the air passing through the evaporator 34 is cooled by this refrigerant.

  The evaporator 34 is disposed obliquely so that the direction in which the tube extends substantially coincides with the vehicle front-rear direction and the vehicle rear side of the evaporator 34 is located above the front side. This is to allow the condensed water generated in the evaporator 34 to flow to the drain portion 35 in front of the vehicle and to secure a space for disposing a first temperature adjusting door 48 described later above the evaporator 34. is there. The drain portion 35 is formed integrally with the vehicle front end portion of the casing 30. All air conditioning air introduced into the casing 30 passes through the evaporator 34.

  An air flow downstream end of the cooling passage 33 is branched into two in the vehicle front-rear direction, and a downstream end on the rear side of the vehicle extends upward from a downstream end on the front side. A first cold air outlet 37 as a first opening is formed at the downstream end of the cooling passage 33 on the front side of the vehicle, and a second cold air outlet 38 as a second opening is formed at the downstream end of the rear side of the vehicle. . The front edge and the rear edge of the first cold air outlet 37 are positioned at substantially the same height. The vehicle front edge of the second cold air outlet 38 is positioned below the rear edge. A central partition 40 is provided between the first cold air outlet 37 and the second cold air outlet 38 to divide the inside of the casing 30 into the cooling passage 34 and the space above it.

  An air flow upstream end of a heating passage 41 is connected to the first cold air outlet 37, and the heating passage 41 extends obliquely upward toward the rear side of the vehicle as a whole above the central partition wall 40. The width direction of the heating passage 41, that is, the center portion in the left-right direction, and the center portion in the left-right direction of the casing 30 substantially coincide with each other. A heater core 43 serving as a heat exchanger for heating that passes and heats cold air flowing through the heating passage 41 is disposed in the middle of the heating passage 41 in the vertical direction so as to cross the heating passage 41. Although not shown, the heater core 43 is smaller than the evaporator 34 and has fins interposed between a number of tubes in the same manner as the evaporator 34. The cooling water of the engine is constantly circulated through the tube of the heater core 43, and the air passing through the heater core 43 is heated by the cooling water.

  The heater core 43 is disposed obliquely so that the direction in which the tube extends substantially coincides with the vehicle front-rear direction and the vehicle rear side of the heater core 43 is located below the front side. Therefore, the distance between the heater core 43 and the evaporator 34 increases as it goes to the vehicle front side. Further, the vehicle rear end portion of the heater core 43 is located at a substantially central portion of the casing 30 in the vehicle front-rear direction, and is supported by the central partition wall 40.

  Above the heater core 43, there is provided an upper partition wall 45 that divides the upper half of the casing 30 into the heating passage 41 and the space above it. A hot air outlet 46 formed at the downstream end of the heating passage 41 opens toward the rear of the vehicle between the rear end of the upper partition 45 and the rear end of the central partition 40. . The hot air outlet 46 and the second cold air outlet 38 are close to each other.

  As shown in FIG. 8, a left throttle portion 42 and a right throttle portion 44 that squeeze the heating passage 41 from both the left and right sides are provided on the left and right side walls of the heating passage 41 on the downstream side of the heater core 43. Yes. The left throttle portion 42 is formed by expanding the passenger seat side portion 32b of the casing 30 into the heating passage 41, and is integrally formed with the passenger seat side portion 32b. As shown in FIG. 5, the left throttle portion 42 extends from the vicinity of the hot air outlet 46 of the heating passage 41 to the vicinity of the front end of the passenger seat side portion 32 b, and the heating passage 41 increases toward the hot air outlet 46. The degree of bulging from the left side wall is increased. Therefore, the upper wall and the lower wall of the left throttle portion 42 are triangular shapes that expand toward the warm air outlet 46 in a plan view.

  The upper wall of the left throttle portion 42 extends substantially horizontally and flatly, while the lower wall extends so as to be positioned on the lower side toward the hot air outlet 46 side. Accordingly, the length of the left throttle portion 42 in the vertical direction becomes longer as it goes to the warm air outlet 46 side. The wall portion inside the heating passage 41 of the left throttle portion 42 has a triangular shape that expands toward the warm air outlet 46 in a side view, and approaches the central portion in the left-right direction of the heating passage 41 toward the warm air outlet 46 side. Inclined to extend substantially flat.

  The right throttle portion 44 is formed by expanding the driver seat side portion 32a of the casing 30 into the heating passage 41, and is integrally formed with the driver seat side portion 32a. As shown in FIG. 1, the right throttle portion 44 extends from the vicinity of the hot air outlet 46 of the heating passage 41 to the vicinity of the center of the heating passage 41 in the vehicle front-rear direction, and heats toward the hot air outlet 46 side. The degree of swelling from the right side wall of the passage 41 is formed to be large. The degree of swelling of the right throttle part 44 on the hot air outlet 46 side is set to be larger than the degree of swelling of the left throttle part 42 on the hot air outlet 46 side.

  The upper wall of the right throttle 44 is constituted by the upper partition 45, the lower wall extends substantially parallel to the upper wall, and the wall inside the heating passage 41 of the right throttle 44 is substantially rectangular in side view. Has been. The wall portion on the inner side of the heating passage 41 of the right throttle portion 44 is inclined so as to approach the central portion in the left-right direction of the heating passage 41 toward the warm air outlet 46 and extends substantially flat. Further, the vehicle rear wall of the right diaphragm 44 is arranged so as to overlap the vehicle rear wall of the left diaphragm 42 in a side view.

  The first cold air outlet 37 and the second cold air outlet 38 in the casing 30 include a first temperature adjusting door 48 and a second temperature that open and close the air outlets 37 and 38 in accordance with the room temperature set by the occupant. An adjustment door 49 is arranged. Since the first temperature control door 48 and the second temperature control door 49 have the same structure, the structure of the second temperature control door 49 will be described in detail below.

  As shown in FIGS. 6 and 7, the second temperature adjusting door 49 includes a rotating shaft 50, a one-side blocking portion 51 and an other-side blocking portion 52 that extend on both radial sides of the rotating shaft 50. Is a butterfly door. Notches 53 are provided at both ends of the rotation shaft 50, and the actuator 54 is engaged via a link member 55 (shown in FIGS. 3 and 4). The one side blocking part 51 and the other side blocking part 52 are formed in the same rectangular plate shape. Seal members 56 are respectively disposed on the opposite sides of the peripheral edge of the one-side blocking part 51 and the peripheral edge of the other-side blocking part 52. The seal member 56 is made of, for example, an elastic member such as urethane foam, and is configured to prevent air from leaking by contacting the peripheral edge of the second cold air outlet 38. In addition, the code | symbol 57 in FIG. 6 has shown the rectangular-shaped recessed part formed in both surfaces of the obstruction | occlusion parts 51 and 52. FIG.

  As shown in FIG. 6A, the left side plate portion 62 extending in the direction intersecting the rotation shaft 50 in a plan view is formed on the one side closing portion 51 and the other side closing portion 52 of the second temperature adjusting door 49. The right side plate portion 63 protrudes with a gap in the extending direction of the rotation shaft 50. As will be described in detail later, the left side plate portion 62 is located on the left side with the second temperature control door 49 attached to the casing 30 and mounted on the vehicle, and the right side plate portion 63 is similarly located on the right side.

  The left side plate portion 62 and the right side plate portion 63 extend substantially perpendicular to the closing portions 51 and 52 as shown in FIG. The left side plate portion 62 extends from the vicinity of the seal member 56 of the one-side blocking portion 51 to the vicinity of the edge portion on the opposite side of the rotation shaft 50 of the other-side blocking portion 52, and is positioned on the left side as going to the other-side blocking portion 52 side. And is inclined with respect to a plane orthogonal to the rotation shaft 50. Further, the right side plate portion 63 also extends from the vicinity of the seal member 56 of the one side closing portion 51 to the vicinity of the edge portion on the opposite side of the rotation shaft 50 of the other side closing portion 52 and to the right side as it goes to the other side closing portion 52 side. It extends so as to be positioned, and is inclined with respect to a plane orthogonal to the rotation shaft 50. That is, the distance between the left side plate portion 62 and the right side plate portion 63 becomes larger as going to the other side closing portion 52 side. Further, the angle at which the right side plate portion 63 is inclined with respect to the plane orthogonal to the rotation axis 50 is larger than the angle at which the left side plate portion 62 is inclined with respect to the plane orthogonal to the rotation axis 50.

  The second temperature adjusting door 49 has the left side plate portion 62 and the right side plate portion when the direction in which the rotation shaft 50 extends substantially coincides with the vehicle width direction, and as shown in FIG. 63 is arranged so as to be located on the upper side. Further, the rotation shaft 50 of the second temperature adjustment door 49 is located at the substantially central portion of the second cold air outlet 38 in the vehicle front-rear direction. The left end portion of the rotation shaft 50 of the second temperature adjusting door 49 protrudes from the casing 30, and the link member 55 is engaged with the cutout portion 53 at the left end portion.

  When the second temperature adjusting door 49 is in a fully closed state, the sealing member 56 of the one side closing portion 51 and the sealing member 56 of the other side closing portion 52 are in contact with the peripheral edge portion of the second cold air outlet 38. As shown in FIG. 1, the second temperature adjustment door 49 in the fully closed state is rotated so that the one-side closing portion 51 moves downward and the other-side closing portion 52 moves upward, thereby closing both ends. The second temperature adjusting door 49 is fully opened by setting the extending direction of the portions 51 and 52 to be the vertical direction. When the second temperature adjustment door 49 is fully opened, the end on the one side closing portion 51 side of the left side plate portion 62 and the right side plate portion 63 protrudes into the cooling passage 33 from the second cold air outlet 38, and the other The portion is located above the second cold air outlet 38.

  Thereby, the left side plate part 62 and the right side plate part 63 extend in the flow direction of the cold air blown upward from the second cold air outlet 38. Furthermore, since these both plate parts 62 and 63 are extended so that it may leave | separate in the left-right direction so that it goes to the downstream of cold air, the flow of cold air spreads in the left-right direction by both plate parts 62 and 63. That is, the left side plate portion 62 and the right side plate portion 63 are the cold air guide portions of the present invention, and the flow of the cold air when the second temperature adjustment door 49 is opened is in the left-right direction of the air mix space 65 described later. It is formed to spread.

  Further, when the second temperature adjusting door 49 is in a fully opened state, the rotating shaft 50 side and the other side closing portion 52 of the one side closing portion 51 face substantially the entire hot air outlet 46, and the second A cold air flow path 90 (described later) blown out from the cold air outlet 38 is divided into two in the vehicle front-rear direction. Furthermore, the front end side of the one-side closing portion 51 of the second temperature adjustment door 49 in the fully opened state protrudes from the second cold air outlet 38 into the cooling passage 33.

  The first temperature control door 48 includes a rotation shaft 58, a one-side blocking portion 59, the other-side blocking portion 60, a seal member 61, a left side plate portion 64 and a right side plate portion 67. The first temperature adjusting door 48 has a left side plate portion 64 and a right side on the lower side when the extending direction of the rotation shaft 58 substantially coincides with the vehicle width direction, and as shown in FIG. It arrange | positions so that the board part 67 may be located. The rotation shaft 58 of the first temperature adjusting door 48 is located at the substantially central portion of the first cold air outlet 37 in the vehicle front-rear direction. The left end portion of the rotating shaft 58 of the first temperature adjusting door 48 protrudes from the casing 30 in the same manner as the rotating shaft 50 of the second temperature adjusting door 49, and the second temperature is notched at the notch 53 of the left end portion. A link member 55 that drives the adjustment door 49 is engaged.

  When the first temperature adjusting door 48 is in a fully closed state, the seal member 61 of the one-side closing portion 59 and the seal member 61 of the other-side closing portion 60 are in contact with the peripheral edge portion of the first cold air outlet 37, respectively. As shown in FIG. 9, the first temperature control door 48 in the fully closed state is rotated so that the one-side closing part 59 moves downward and the other-side closing part 60 moves upward, thereby closing both the doors. The first temperature control door 48 is fully opened by setting the extending direction of the portions 59 and 60 to be the vertical direction.

  An air mix space 65 is provided above the second cold air outlet 38 on the vehicle rear side in the casing 30. The second cold air outlet 38 and the hot air outlet 46 are connected to the air mix space 65, and the cold air and the hot air flow in from the second air outlet 38 and the hot air outlet 46, respectively. The cold air and the warm air flowing into the air mix space 65 are mixed in the air mix space 65 to become conditioned air. The volume of the air mix space 65 is sufficient to allow the cold air and hot air to be mixed efficiently.

  The width direction on the upstream side of the air mix space 65, that is, the center portion in the left-right direction, and the substantially center portion in the left-right direction of the casing 30 substantially coincide with each other. Accordingly, the center portions in the left-right direction on the upstream side of the warm air outlet 46, the second cold air outlet 38, and the air mix space 65 are located on substantially the same plane.

  The upper portion of the casing 30 bulges on both the left and right sides, and the downstream side of the air mix space 65 expands in the left-right direction more than the upstream side. As shown in FIGS. 3 and 4, the degree of swelling of the upper portion of the casing 30 is set to be larger on the right side than on the left side. , It is shifted to the right side from the central portion in the left-right direction on the upstream side. Further, as shown in FIG. 3, vent outlets 66 connected to the air mix space 65 are located in the vicinity of both ends in the left-right direction of the casing 30 at the upper wall portion of the casing 30 substantially directly above the air mix space 65. It is long in the left-right direction so as to extend. The central portion of the vent outlet 66 in the left-right direction is shifted to the right side from the central portion in the left-right direction on the upstream side of the air mix space 65. Moreover, as shown in FIG. 1, the center derivation | leading-out part 66a, the air mix space 65, and the 2nd cold wind blower outlet 38 are located in a straight line.

  The vent outlet 66 allows the conditioned air generated in the air mix space 65 to be led out to the center ventilator 81 and the side ventilator 82 provided respectively at the substantially central portion in the left-right direction and both left and right end portions of the instrument panel 2. It is divided into a center lead-out part 66a and a side lead-out part 66b.

  The center lead-out portion 66a is connected to the center ventilator 81 by a center vent duct (not shown) provided in the instrument panel 2. The side lead-out portion 66b is connected to the side ventilator 82 by a side vent duct (not shown) that is also provided in the instrument panel 2. The conditioned air is blown out from the center ventilator 81 and the side ventilator 82 toward the upper body of the occupant.

  A defroster outlet chamber 68 is provided above the upper partition wall 45 in the casing 30. A first opening 69 for allowing the conditioned air generated in the air mix space 65 to flow into the defroster outlet chamber 68 is provided between the vehicle rear end portion of the upper partition 45 and the upper wall portion of the casing 30. Yes. A defroster for allowing the conditioned air flowing into the defroster outlet chamber 68 to be led to the defroster 85 and the demister 85a provided in the instrument panel 2 on the upper wall portion of the casing 30 at a position near the vehicle front side above the defroster outlet chamber 68. A lead-out port 70 is formed. That is, the defroster outlet 70 is formed over substantially the entire left and right direction with the upper wall portion of the casing 30 away from the center outlet 66a and the side outlet 66b toward the front of the vehicle.

  The defroster outlet 70 is connected to a defroster 85 and a demister 85a by a defroster duct (not shown) provided in the instrument panel 2, and conditioned air is supplied from the defroster 85 and the demister 85a to the front window glass and the side door. It blows out toward the inner surface of the wind glass.

  A foot derivation chamber 71 is formed in the casing 30 on the vehicle front side of the defroster derivation chamber 68. The wall between the foot derivation chamber 71 and the defroster derivation chamber 68 is supplied with conditioned air from the defroster derivation chamber 68. A second opening 72 for flowing into the outlet chamber 71 is formed. Left and right foot outlets 73 are formed in the upper part of the left and right side walls of the casing 30 to lead the conditioned air in the foot outlet chamber 71 to the feet of the passengers in the driver's seat and the passenger seat. Yes. That is, these left and right foot outlets 73 are connected to left and right foot ducts 74 that extend downward along the left and right side walls of the casing 30, respectively. Open at the foot of each passenger. From the openings of these foot ducts 74, the conditioned air in the foot derivation chamber 73 blows out toward the feet of each occupant.

  Further, the foot duct 74 on the driver's seat side communicates with two connecting portions 75 connected to a rear seat duct (not shown) extending to the rear seat, and the air in the foot lead-out chamber 71 is in the rear seat occupant. It is designed to blow out at the feet of the feet.

  In the vicinity of the center lead-out portion 66a and the side lead-out portion 66b in the casing 30, a first outlet direction switching door 76 that opens and closes the center lead-out portion 66a and the side lead-out portion 66b at the same time according to the blow-out mode set by the occupant is provided. It has been. The first blowing direction switching door 76 includes a rotation shaft 86 extending in the vehicle width direction, a rectangular plate-shaped blocking portion 87 extending radially outward from the rotation shaft 86, and both surfaces of the blocking portion 87. And a sealing member 88 provided respectively. The first blowing direction switching door 76 rotates between a position where the center lead-out portion 66a and the side lead-out portion 66b are fully opened and a position where the center lead-out portion 66b is fully closed. When the first outlet direction switching door 76 fully opens the center outlet portion 66a and the side outlet portion 66b, the first opening 69 is fully closed, while the first outlet direction switching door 76 is When the center lead-out part 66a and the side lead-out part 66b are fully closed, the first opening 69 is fully opened.

  A second blowing direction switching door 77 that opens and closes the defroster outlet 70 according to the blowing mode is provided near the defroster outlet 70 in the casing 30. Similar to the first blowing direction switching door 76, the second blowing direction switching door 77 includes a rotating shaft 92, a closing portion 93, and a seal member 94 extending in the vehicle width direction. The second blowing direction switching door 77 rotates between a position where the defroster outlet 70 is fully opened and a position where the defroster outlet 70 is fully closed. If the 2nd blowing direction switching door 77 makes the defroster derivation | leading-out port 70 into a full open state, the 2nd opening part 72 will be made into a fully closed state, On the other hand, the 2nd blowing direction switching door 77 will fully open the defroster derivation | opening port 70. Then, the second opening 72 is fully opened.

  The first blowing direction switching door 76 and the second blowing direction switching door 77 are similar to the first temperature adjusting door 48 and the second temperature adjusting door 49, and the actuator 78 and the link disposed on the left side wall portion of the casing 30. The member 79 (shown in FIGS. 3 and 4) is rotated so that the center outlet 66a, the side outlet 66b, and the defroster outlet according to the outlet mode such as the vent mode, the defroster mode, and the foot mode. The open / close state of 70 and the second opening 72 is switched.

  Next, the flow of air in the air conditioner 1 configured as described above will be described. First, the air-conditioning air blown by the fan 23 of the blower unit 3 passes through the intermediate duct 5 from the inlet 25 to the air-conditioning unit 4. Is introduced into the casing 30.

  Subsequently, the air introduced into the casing 30 of the air conditioning unit 4 flows upward immediately after the introduction, passes through the evaporator 34, and is cooled by the evaporator 34 at this time. And if the 1st temperature control door 48 and the 2nd temperature control door 49 are an open state, some cold winds which passed the evaporator 34 will flow in into the heating channel | path 41 from the 1st cold wind blower outlet 37, and the remainder is 2nd. The cold air outlet 38 bypasses the heating passage 41 and flows into the air mix space 65. That is, in the vicinity of the second cold air outlet 38 of the air mix space 65, only the cold air exists and forms a cold air flow path 90.

  The cold air that has flowed into the heating passage 41 flows obliquely upward toward the rear side of the vehicle, passes through the heater core 43, and is heated by the heater core 43 at this time. The hot air heated by the heater core 43 passes through the left throttle portion 42 and the right throttle portion 44 and flows into the air mix space 65 from the hot air outlet 46. That is, in the vicinity of the hot air outlet 46 in the air mix space 65, only hot air exists and forms a hot air flow path 91.

  The flow rate ratio between the cool air and the warm air flowing into the air mix space 65 is determined by adjusting the opening degree of the first cool air outlet 37 by the first temperature adjusting door 48 and the second cold air outlet 38 by the second temperature adjusting door 49. It is determined by adjusting the opening degree. By changing the flow rate ratio between the cold air and the hot air, the temperature of the conditioned air generated in the air mix space 65 can be changed.

  Specifically, as shown in FIG. 1, when the air conditioner 1 is set to a 1/2 hot mode in which the opening degree of each of the first temperature adjustment door 48 and the second temperature adjustment door 49 is about half, Cold air flows into the air mix space 65 from the second cold air outlet 38 and warm air flows from the hot air outlet 46. The warm air before flowing into the air mix space 65 passes through the evaporator 34 and the heater core 43 and flows through the cooling passage 33 and the heating passage 41 to reach the place where the left throttle portion 42 and the right throttle portion 44 are formed. To do. The hot air passes through the places where the throttle parts 42 and 44 are formed, and the flow velocity increases. Further, the flow of the hot air is caused by the walls of the throttle parts 42 and 44 facing each other in the heating passage 41. It is directed to the center in the left-right direction. That is, the warm air flowing into the air mix space 65 is directed to the central portion in the left-right direction of the air mix space 65 with increased momentum.

  On the other hand, the flow of the cold air flowing into the air mix space 65 from the second cold air outlet 38 is guided by the left side plate portion 62 and the right side plate portion 63 so as to spread in the left-right direction. Thereby, the flow velocity of the center part in the left-right direction of the air mix space 65 in the flow of cold air is lowered, and the momentum in the center part in the left-right direction is weakened.

  Thereby, it becomes possible to let the flow of warm air enter into the flow of cool air in the air mix space 65, and the warm air and the cool air are well mixed in the air mix space 65.

  Further, the left throttle portion 42 and the right throttle portion 44 are formed so as to swell from the side wall of the heating passage 41, and the wall portion inside each heating passage 41 is heated toward the hot air outlet 46 side. Since it inclines so that it may approach the left-right direction center part of the channel | path 41, it is warm air compared with arrange | positioning the plate-shaped thing extended in the left-right direction in the left-right direction center part of the air mix space 65 conventionally. Ventilation resistance is reduced. In addition, since the left throttle portion 42 and the right throttle portion 44 are provided in the heating passage 41, the flow of the cold air is suppressed from being inhibited by the throttle portions 42 and 44.

  Since the left side plate part 62 and the right side plate part 63 extend in the flow direction of the cool air in the air mix space 65, the resistance to the cool air flow is smaller than that of the conventional one described above. In addition, since the left side plate portion 62 and the right side plate portion 63 are provided in the second temperature adjusting door 49 disposed in the second cold air outlet 38, they are located in the vicinity of the second cold air outlet 38. . Thereby, it is suppressed that the flow of warm air is inhibited by the both plate portions 62 and 63.

  In the 1/2 hot mode, the first blowing direction switching door 76 is turned to the vent mode until the center outlet 66a and the side outlet 66b are fully opened and the first opening 69 is fully closed. The conditioned air generated in the space 65 is derived from the center deriving unit 66a and the side deriving unit 66b.

  At this time, since the left side plate portion 62 and the right side plate portion 63 of the second temperature control door 49 are inclined so as to be located on the left side and the right side as they go upward, the conditioned air is generated by these both plate portions 62 and 63. Can be distributed in the left-right direction. And since the right side plate portion 63 is inclined more greatly, even if the left-right direction center portion of the vent outlet 66 is shifted to the right side from the left-right direction center portion on the upstream side of the air mix space 65 as described above, It is possible to guide the conditioned air to the right side of the vent outlet port 66 by the right side plate portion 63 so that the amount of conditioned air blown out from the vent outlet port 66 can be made substantially uniform across the left and right ends.

  In the air conditioner 1, since the air blowing unit 3 is arranged on the left side of the air conditioning unit 4, air conditioning air is introduced into the air conditioning unit 4 from the left side to the right side. As a result, the flow of air-conditioning air introduced into the air-conditioning unit 4 is slightly biased to the right as a whole in the casing 30, so that warm air is also biased to the right in the heating passage 41. The bias of the warm air in the heating passage 41 is corrected by the right throttle part 44 bulging larger than the left throttle part 42.

  When the occupant desires rapid cooling, the vehicle is switched to the full cold mode shown in FIG. 1 and the first temperature adjusting door 48 is rotated until the first cold air outlet 37 is fully closed. The second temperature adjusting door 49 is rotated until the second cold air outlet 38 is fully opened. As a result, only the cold air flows into the air mix space 65 from the second cold air outlet 38. At the time of the full cold mode, at the same time, the first blowing direction switching door 76 is rotated until the vent outlet 66 is fully opened and the first opening 69 is fully closed to be in the vent mode. As a result, the cold air that has flowed into the air mix space 65 from the second cold air outlet 38 flows straight up in the air mix space 65 and is led out from the center lead-out portion 66a and the side lead-out portion 66b.

  In the full cold mode, since the left throttle portion 42 and the right throttle portion 44 are provided in the heating passage 41, both the throttle portions 42 and 44 hardly affect the air flow in the casing 30. Further, since the left side plate portion 62 and the right side plate portion 63 extend in the cold air flow direction as described above, the degree to which the plate portions 62 and 63 impede the flow of the cold air is extremely small. By these things, it becomes possible to ensure a large air volume easily at the time of a full cold mode.

  At this time, as in the case of the 1/2 hot mode, the left plate 62 and the right plate 63 can make the amount of conditioned air blown from the vent outlet 66 substantially uniform across the left and right ends. Become.

  In the full cold mode, the one-side closed portion 51 and the other-side closed portion 52 of the second temperature adjustment door 49 face the hot air outlet 46 and divide the cold air flow path 90 into two in the vehicle front-rear direction. The width in the vehicle front-rear direction of the flow path 90 on the vehicle front side facing the hot air outlet 46 is narrower than before the second temperature control door 38 is fully opened.

  When the occupant desires rapid heating, it is switched to the full hot mode shown in FIG. 9 and the first temperature adjustment door 48 is rotated until the first cold air outlet 37 is fully opened. The second temperature adjusting door 49 is rotated until the second cold air outlet 38 is fully closed. As a result, only warm air flows into the air mix space 65 from the warm air outlet 46. At the same time in the full hot mode, the first outlet switching door 76 is rotated until the vent outlet 66 is fully closed and the first opening 69 is fully opened, and the second outlet direction switching door 77 is connected to the defroster outlet 70. The second opening 72 is rotated until the second opening 72 is fully closed. Thereby, the warm air flowing into the air mix space 65 from the warm air outlet 46 flows into the defroster derivation chamber 68 from the air mix space 65 and is then led out from the defroster outlet 70. In this full hot mode, the second blowing direction switching door 77 is rotated to an intermediate position between the defroster outlet 70 and the second opening 72, and conditioned air is supplied to the defroster outlet 70 and the foot outlet 73. You may make it derive | lead-out from.

  In the full hot mode, as described above, the left throttle portion 42 and the right throttle portion 44 are formed so as to swell from the side wall of the heating passage 41, and the wall portion inside each heating passage 41 is inclined. Therefore, it becomes possible to ensure a large air volume easily.

  As described above, according to the vehicle air conditioner 1 according to this embodiment, the left throttle portion 62 and the right throttle portion 63 formed on the side wall of the heating passage 41 increase the momentum of the warm air and The flow can be directed to the center in the left-right direction of the air mix space 65. In addition, the left side plate portion 62 and the right side plate portion 63 formed on the second temperature control door 49 can weaken the momentum at the central portion in the left-right direction of the air mix space 65 in the flow of cold air. Thereby, when warm air and cold air are allowed to flow into the air mix space 65 as in the 1/2 hot mode, these warm air and cold air can be well mixed and blown out from the outlets 66 and 70. The temperature of the conditioned air can be made substantially uniform in the left-right direction.

  And since the said throttle parts 42 and 44 are made into the shape which protrudes from the side wall of the heating channel | path 41, and the said both board parts 62 and 63 were made into the shape extended in the flow direction of a cold wind, in each said mode, the expected air volume is easy The air conditioning capacity can be increased.

  Further, since the left throttle portion 42 and the right throttle portion 44 are formed integrally with the passenger seat side portion 32b and the driver seat side portion 32a, the number of parts is increased by providing these throttle portions 42 and 44. Can be avoided, and the cost can be reduced.

  Further, in this embodiment, since the left plate portion 62 and the right plate portion 63 are provided in addition to the left throttle portion 42 and the right throttle portion 44, the shapes of both the throttle portions 42 and 44 need not be made small due to design restrictions. Even in the case where the air temperature is not obtained, the air mix space 65 can mix the warm air and the cool air well.

  In addition, when the center in the left-right direction of the vent outlet 66 is shifted to the right side from the center in the left-right direction on the upstream side of the air mix space 65, the left side plate portion 62 and the right side plate portion 63 do not provide a separate member. The air volume from the vent outlet 66 can be made substantially uniform in the left-right direction, and the cost can be reduced.

  In the above embodiment, the left plate portion 62 and the right plate portion 63 are provided in addition to the left throttle portion 42 and the right throttle portion 44. However, the shape of each passage 33, 41 and the layout of the heat exchangers 34, 43 are provided. Although not shown in the drawings, the plate portions 62 and 63 may be omitted, or the diaphragm portions 42 and 44 may be omitted while leaving the plate portions 62 and 63.

  Further, in the above embodiment, the angle formed by the one side closing part 51 and the other side closing part 52 of the second temperature adjusting door 49 is set to approximately 180 ° when viewed from the direction in which the rotation shaft 50 extends. However, the angle formed by the closing portions 51 and 52 may be larger or smaller than 180 °.

  Furthermore, in the said embodiment, although the ventilation unit 3 is made into the different body from the air conditioning unit 4, you may make it accommodate a ventilation fan, an evaporator, a heater core, etc. in one casing, and you may make it comprise an air conditioning apparatus integrally. .

  As described above, the vehicle air conditioner according to the present invention accommodates the cooling heat exchanger and the heating heat exchanger in the casing, mixes the cold air and the hot air generated by these heat exchangers, and conditioned air. Can be used.

It is the figure which showed the internal structure of the air conditioning unit of the vehicle air conditioner which concerns on embodiment of this invention, and looked at the state which this air conditioning unit is in a full cold mode from the passenger seat side. It is a perspective view of an instrument panel. It is a perspective view of a vehicle air conditioner. It is the schematic which looked at the air conditioner for vehicles from the vehicle back. It is the figure which looked at the state in which an air-conditioning unit is in full cold mode from the driver's seat side. (A) is the figure which looked at the 2nd temperature control door from the left side board part and the right side board part side, (b) is the figure which looked at the 2nd temperature control door from the opposite side to (a). It is the figure which looked at the 2nd temperature control door of FIG. 6 from the lower side. It is the sectional view on the AA line in FIG. FIG. 2 is a view corresponding to FIG. 1 in a state where the air conditioning unit is in a full hot mode. FIG. 2 is a view corresponding to FIG. 1 in a state where the air conditioning unit is in a 1/2 hot mode.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 25 Inlet 30 Casing 33 Cooling passage 34 Evaporator (cooling heat exchanger)
37 First cold air outlet (first opening)
38 Second cold air outlet (second opening)
41 Heating passage 42 Left throttle 43 Heater core (heating heat exchanger)
44 Right side throttle part 48 1st temperature control door 49 2nd temperature control door 51 One side obstruction | occlusion part 52 Other side obstruction | occlusion part 62 Left side board part (cold air guide part)
63 Right side plate (cold air guide)
65 Air mix space

Claims (2)

A cooling heat exchanger and a casing containing the heating heat exchanger are provided. Air conditioning air is introduced into the casing from an inlet formed in the casing, and the cooling heat exchanger and the heating heat exchanger are used. A vehicle air conditioner configured to generate conditioned air and supply the conditioned air to a passenger compartment from an outlet formed in the casing,
In the casing,
The cooling heat exchanger is disposed in the middle portion connected to the introduction port and extends downstream in the air flow direction, and the first opening and the second opening are provided at the downstream end, and the cooling heat exchange is performed. A cooling passage through which air that has passed through the vessel flows toward the first opening and the second opening;
A heating passage connected to the first opening of the cooling passage and extending downstream in the air flow direction, the heating heat exchanger being disposed in the middle, and the air passing through the heating heat exchanger flowing;
The second opening of the cooling passage, the downstream end of the heating passage, and the outlet port are connected, and cool air and hot air blown from the second opening and the downstream end of the heating passage are introduced and mixed to mix conditioned air. An air mix space that generates and directs the conditioned air to the outlet;
A temperature adjusting door that changes a ratio between the amount of cold air flowing into the air mix space from the second opening and the amount of hot air flowing into the air mix space from the downstream end of the heating passage;
Projecting from the side wall of the heating passage toward the center in the width direction of the heating passage on the downstream side in the air flow direction from the first opening of the cooling passage and upstream from the air mix space. An air conditioner for a vehicle, characterized by being provided with a throttle section for narrowing the passage and directing hot air toward the center in the width direction of the heating passage. In the vehicle air conditioner according to claim 1,
The throttle unit is integrally formed with the casing.

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