JP6259302B2 - Air conditioner for vehicles - Google Patents

Description

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

  In general, a vehicle air conditioner includes a casing that houses a heat exchanger for cooling and a heat exchanger for heating. Inside the casing, an air mix damper is disposed between the cooling heat exchanger and the heating heat exchanger, and the air mix damper passes through the cooling heat exchanger and the heating heat exchanger. The amount of air conditioning air to be changed is changed to generate conditioned air at a desired temperature (see, for example, Patent Document 1). The air mix damper of Patent Document 1 includes a support shaft and a closing plate portion extending in the radial direction of the support shaft from the outer peripheral surface of the support shaft, and the closing plate portion opens and closes by rotating the support shaft. It is supposed to be.

JP 2012-153223 A

  By the way, in recent years, miniaturization of a vehicle air conditioner has been demanded, and in order to realize this, a method of reducing the casing by reducing the interval between the cooling heat exchanger and the heating heat exchanger can be considered. However, in patent document 1, an air mix damper is arrange | positioned between the heat exchanger for cooling and the heat exchanger for heating, and the obstruction board part of an air mix damper is provided with the heat exchanger for cooling and the heat exchanger for heating. The interval between the cooling heat exchanger and the heating heat exchanger is narrowed in order to prevent the blocking plate portion from interfering with the cooling heat exchanger or the heating heat exchanger. It may be difficult to do.

  In view of this, it is conceivable to dispose the air mix damper out of the space between the cooling heat exchanger and the heating heat exchanger. However, in the state where the cooling heat exchanger and the heating heat exchanger are brought close to each other as described above, if there is no air mix damper between these heat exchangers, for example, at the time of maximum cooling, When a large amount of air is flowing through the heat exchanger, warm air in the vicinity of the heating heat exchanger is sucked into the cold air (so-called heat pickup phenomenon), resulting in a decrease in cooling performance.

  This invention is made | formed in view of this point, The place made into the objective passes through a heat exchanger for cooling, when the heat exchanger for cooling and the heat exchanger for heating are arrange | positioned closely. The purpose is to prevent the air in the vicinity of the heat exchanger for heating from being sucked into the air and to suppress the deterioration of the cooling performance.

  In order to achieve the above object, in the present invention, a heat pickup suppression damper having a damper plate that covers an air passage surface of a heating heat exchanger is provided between the cooling heat exchanger and the heating heat exchanger, The plate was supported in a state of being separated in the radial direction of the rotation shaft so that the plate could be rotated.

The first invention is
A cooling heat exchanger in which the air passage surface extends in the vertical direction and a casing that houses the heating heat exchanger in which the air passage surface extends in the vertical direction ;
In a vehicle air conditioner provided with an air mix damper for changing the amount of air disposed in the casing and passing through the cooling heat exchanger and the heating heat exchanger,
In the casing, the cooling heat exchanger and the heating heat exchanger are arranged so as to be aligned in the air flow direction,
On the upper side between the cooling heat exchanger and the heating heat exchanger, an upper heat pickup suppression damper for suppressing air in the vicinity of the heating heat exchanger from being mixed into the cold air is disposed. ,
On the lower side between the cooling heat exchanger and the heating heat exchanger, a lower heat pickup suppression damper is arranged to prevent air in the vicinity of the heating heat exchanger from entering the cold air. Established,
The upper and lower heat pickup suppression dampers each have a rotation shaft rotatably supported on the casing between the cooling heat exchanger and the heating heat exchanger, and the rotation shaft. And a damper plate disposed on the heating heat exchanger side to cover the air passage surface of the heating heat exchanger, and the damper plate spaced apart in the radial direction of the rotation shaft. It has been closed and a connecting portion for connecting,
The upper and lower heat pickup suppression dampers rotate in opposite directions around the rotation axis .

  According to this configuration, the air in the vicinity of the heat exchanger for heating is less likely to be mixed into the cold air by covering the air passage surface of the heat exchanger for heating with the damper plate of the heat pickup suppression damper during maximum cooling. On the other hand, except during the maximum cooling, the air passage surface of the heat exchanger for heating is not covered by rotating the rotating shaft in the state of the maximum cooling and rotating the damper plate around the rotating shaft. It is possible to position the damper plate on the surface. At this time, since the damper plate is separated in the radial direction of the rotating shaft, the damper plate is moved by the rotation of the rotating shaft even when the interval between the cooling heat exchanger and the heating heat exchanger is narrow. It becomes possible to make a large rotation.

According to a second invention, in the first invention,
A plurality of the connecting portions are provided at intervals in the axial direction of the rotating shaft.

  According to this configuration, since a gap through which air can flow is formed between the connecting portions, the air flow resistance is reduced.

According to a third invention, in the first or second invention,
The damper plate is provided with a seal member that contacts the heating heat exchanger while covering an air passage surface of the heating heat exchanger.

  According to this configuration, air hardly leaks from between the damper plate and the heating heat exchanger in a state where the damper plate covers the air passage surface of the heating heat exchanger. Becomes more difficult to mix with cold air.

According to a fourth invention, in any one of the first to third inventions,
The damper plate extends in a direction along the air passage surface in a state of covering the air passage surface of the heat exchanger for heating.

  According to this configuration, the air passage surface of the heating heat exchanger is reliably covered by the damper plate, and the air in the vicinity of the heating heat exchanger is unlikely to be mixed into the cold air.

  According to the first invention, since the heat pickup suppression damper has a damper plate that covers the air passage surface of the heating heat exchanger, the cooling heat exchanger and the heating heat exchanger are arranged close to each other. In this case, it is possible to prevent the air in the vicinity of the heat exchanger for heating from being sucked into the cold air, thereby suppressing a decrease in the cooling performance. Since the damper plate is provided in the radial direction away from the rotating shaft disposed between the cooling heat exchanger and the heating heat exchanger, the cooling heat exchanger and the heating heat exchanger Even when the interval is small, it is possible to position the damper plate so as not to cover the heating heat exchanger by largely rotating the damper plate, thereby ensuring the desired heating performance.

  According to the second aspect, since the plurality of connecting portions are provided at intervals in the axial direction of the rotation shaft, the air flow resistance can be reduced.

  According to the third aspect of the invention, the seal member that contacts the heat exchanger for heating is provided on the damper plate, so that the effect of suppressing a decrease in cooling performance can be further enhanced.

  According to the fourth invention, since the damper plate extends in the direction along the air passage surface of the heating heat exchanger, the air passage surface of the heating heat exchanger can be reliably covered with the damper plate, It is possible to prevent air in the vicinity of the heat exchanger from being mixed into the cold air.

1 is a left side view of a vehicle air conditioner according to an embodiment of the present invention. It is sectional drawing of the vehicle air conditioner when a heat pick-up suppression damper is in a closed state. It is sectional drawing of the vehicle air conditioner when a heat pick-up suppression damper is in an open state. It is a left view of the heat pickup suppression damper and link mechanism in a closed state. It is a left view of the heat pick-up suppression damper and link mechanism in an open state. It is a perspective view of an upper side heat pickup suppression damper. It is the front view which looked at the upper heat pick-up suppression damper from the air flow direction upstream. It is the rear view which looked at the upper heat pick-up suppression damper from the air flow direction downstream. It is a top view of an upper side heat pickup suppression damper. It is a bottom view of an upper heat pickup suppression damper. It is a left view of an upper side heat pickup suppression damper.

  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 view of a vehicle air conditioner 1 according to an embodiment of the present invention as viewed from the left side of the vehicle. The vehicle air conditioner 1 is mounted, for example, in an instrument panel (not shown) disposed in the front part of a vehicle interior. In the description of this embodiment, 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 simply referred to as “right”. To do.

  As shown in FIG. 2, the vehicle air conditioner 1 includes an evaporator 2 as a cooling heat exchanger, a heater core 3 as a heating heat exchanger, an air mix damper 4, a heat damper 5, and a differential damper 6. And upper and lower heat pickup suppression dampers 10 and 20 and a casing 7 for housing them, and after adjusting the temperature of the air-conditioning air introduced into the casing 7, supplying the air-conditioning air to each part of the passenger compartment It is configured to be able to.

  The casing 7 is formed by molding a resin material, for example. As shown in FIG. 1, an air inlet 7 a is formed in the front portion of the left wall portion of the casing 7. A blower unit (not shown) is connected to the air introduction port 7a so that air-conditioning air blown from the blower unit is introduced.

  As shown in FIG. 2, a defroster outlet 7 b and a vent outlet 7 c are formed in the rear part of the upper wall portion of the casing 7. A defroster duct (not shown) extending to a defroster port (not shown) of the instrument panel is connected to the defroster outlet 7b. The defroster port is for supplying conditioned air to the inner surface of the front window. Further, a vent duct (not shown) extending to the left and right of the instrument panel and a center vent port (not shown) is connected to the vent outlet 7c. The left and right and center vent ports are for supplying conditioned air to the upper body of the occupant.

  Heat outlets 7d are formed at the rear portions of the left and right side walls of the casing 7, respectively. The heat outlet 7d is for supplying conditioned air to the foot of the passenger.

  An air passage R is formed inside the casing 7. The air passage R includes a cold air passage R1, a hot air passage R2, an air mix space R3, a defroster passage R4, a vent passage R5, and a heat passage R6. The cold air passage R1 extends rearward from the air introduction port 7a. An evaporator 2 is disposed in the cold air passage R1.

  The evaporator 2 is positioned so that the air passage surface 2a extends in the vertical direction and crosses the cold air passage R1. The entire amount of air-conditioning air flowing through the cold air passage R1 passes through the evaporator 2. The evaporator 2 is a tube-and-fin type heat exchanger, and acts as a refrigerant evaporator of the refrigeration cycle apparatus included in the vehicle air conditioner 1.

  The downstream side of the cool air passage R1 is branched into two vertically, and the upstream end of the warm air passage R2 is connected to the lower branch passage. The warm air passage R <b> 2 extends upward while going to the rear side of the casing 7. A heater core 3 is arranged in the warm air passage R2 so as to be aligned with the evaporator 2 in the air flow direction. The heater core 3 is positioned such that its air passage surface 3a extends in the vertical direction and crosses the hot air passage R2. The total amount of air-conditioning air flowing through the hot air passage R <b> 2 passes through the heater core 3. The area of the air passage surface 3 a of the heater core 3 is set smaller than the area of the air passage surface 2 a of the evaporator 2. The heater core 3 is also a tube and fin type heat exchanger. The heater core 3 is supplied with engine cooling water.

  In this embodiment, the evaporator 2 and the heater core 3 are brought close to each other. Thereby, the casing 7 can be reduced in size and the mounting property to a vehicle can be improved. Although details will be described later, upper and lower heat pickup suppression dampers 10 and 20 are disposed in a space between the evaporator 2 and the heater core 3.

  The air mix space R3 is located above the heater core 3 and behind the cold air passage R1. A branch passage on the upper side of the cool air passage R1 is connected to the air mix space R3, and a downstream end of the hot air passage R2 is connected to the air mix space R3. The air mix space R3 is for generating the conditioned air having a desired temperature by mixing the cold air flowing from the upper branch passage of the cold air passage R1 and the hot air flowing from the hot air passage R2.

  The upstream end of the defroster passage R4, the upstream end of the vent passage R5, and the upstream end of the heat passage R6 are connected to the air mix space R3.

  The air mix damper 4 is disposed outside the space between the evaporator 2 and the heater core 3. Specifically, the air mix damper 4 is disposed in the air mix space R3, and opens and closes a branch passage on the upper side of the cold air passage R1 and a downstream end of the hot air passage R2. The air mix damper 4 has a rotating shaft 4a and a closing portion 4b. The rotation shaft 4 a extends in the left-right direction, and both end portions thereof are rotatably supported by the left and right side walls of the casing 7. The blocking portion 4b has a plate shape extending in the radial direction from the outer peripheral surface of the rotating shaft 4a.

  The air mix damper 4 has a maximum cooling position in which the hot air passage R2 is fully closed as shown in FIG. 2 and the branch passage on the upper side of the cold air passage R1 is fully opened, and the hot air passage R2 is shown in FIG. Is fully opened and is rotated between the maximum heating position where the upper branch passage of the cold air passage R1 is fully closed. When the air mix damper 4 is at the maximum cooling position, the air for air conditioning does not flow into the hot air passage R2, so that the entire amount of cold air flowing through the cold air passage R1 flows into the air mix space R3. On the other hand, when the air mix damper 4 is in the maximum heating position, the entire amount of the cool air in the cool air passage R1 flows into the hot air passage R2 and is heated and flows into the air mix space R3.

  The air mix damper 4 can be rotated by an actuator (both not shown) controlled by an air conditioning control device, for example. The air mix damper 4 can be stopped at any position between the maximum cooling position and the maximum heating position, and the amount of cold air and the amount of hot air flowing into the air mix space R3 are changed by this stop position so that the desired temperature is reached. Air-conditioned air can be obtained.

  The heat damper 5 has a rotating shaft 5a and a closing part 5b. The rotation shaft 5 a extends in the left-right direction, and both end portions thereof are rotatably supported by the left and right side walls of the casing 7. The closing part 5b has a plate shape extending in the radial direction from the outer peripheral surface of the rotating shaft 5a. The heat damper 5 rotates between a state where the heat passage R6 is fully closed as shown in FIG. 2 and a state where the heat passage R6 is fully opened as shown in FIG.

  Further, the differential vent damper 6 has a rotating shaft 6a and a closing portion 6b. The rotating shaft 6 a extends in the left-right direction, and both end portions are rotatably supported by the left and right side walls of the casing 7. The blocking portion 6b has a plate shape extending in the radial direction from the outer peripheral surface of the rotating shaft 6a. The differential vent damper 6 has a state in which the defroster passage R4 is fully closed and the vent passage R5 is fully opened as shown in FIG. 2, and the defroster passage R4 is fully opened and the vent passage R5 is shown in FIG. Rotate between the fully closed state.

  The heat damper 5 and the differential vent damper 6 are interlocked by a known link mechanism (not shown). In addition to the vent mode shown in FIG. 2 and the heat mode shown in FIG. 3, the defroster mode and the bi-level mode are used. Etc.

  Next, the structure of the upper and lower heat pickup suppression dampers 10 and 20 will be described. The upper and lower heat pickup suppression dampers 10 and 20 are for suppressing the air (warm air) in the vicinity of the heater core 3 from being mixed into the cold air during maximum cooling, and the heat pickup suppression shown in FIGS. The position can be switched to the ventilation position shown in FIGS. 3 and 5.

  As shown in FIGS. 6 to 11, the upper heat pickup suppression damper 10 includes an upper damper plate 11 that covers substantially the upper half of the air passage surface 3 a of the heater core 3 from the upstream side in the air flow direction, an upper rotating shaft 12, and the like. The upper damper plate 11 and the two upper connecting plates (connecting portions) 13 for connecting the upper rotating shaft 12 are provided.

  The lower heat pickup suppression damper 20 includes a lower damper plate 21 that covers a substantially lower half of the air passage surface 3a of the heater core 3 from the upstream side in the air flow direction, a lower rotating shaft 22, and a lower damper plate 21. And two lower connecting plates (connecting portions) 23 for connecting the lower rotating shaft 22.

  The upper rotating shaft 12 of the upper heat pickup suppression damper 10 is disposed between the evaporator 2 and the heater core 3 so as to be higher than the central portion in the vertical direction of the heater core 3 and extends in the left-right direction. The left and right side walls are rotatably supported. The upper damper plate 11 is formed in a rectangular shape that is long in the left-right direction, and has a posture extending substantially parallel to the air passage surface 3a of the heater core 3 at the heat pickup suppression position shown in FIG. Become. In this state, the upper edge portion of the upper damper plate 11 is located at the same height as the upper edge portion of the air passage surface 3a of the heater core 3 or above the upper edge portion of the air passage surface 3a. The lower edge portion of the upper damper plate 11 is located in the vicinity of the central portion in the vertical direction of the air passage surface 3 a of the heater core 3. The upper damper plate 11 is disposed closer to the heater core 3 than the upper rotation shaft 12 and is closer to the air passage surface 3a.

  The upper connecting plate 13 is provided on each of the left and right sides of the upper rotating shaft 12 as shown in FIG. Each upper connecting plate 13 extends upward from the outer peripheral surface of the upper rotating shaft 12, then bends and extends toward the heater core 3, and its tip is connected to the upper damper plate 11. Due to the shape of the upper connecting plate 13, the upper damper plate 11 can be arranged offset from the upper rotating shaft 12 in the radial direction of the upper rotating shaft 12. Further, the vertical positional relationship between the upper rotating shaft 12 and the upper damper plate 11 is such that the upper rotating shaft 12 is above the lower edge portion of the upper damper plate 11 and the upper damper plate 11 is in the vertical direction. It is set to be lower than the central part.

  Since the upper damper plate 11 is separated in the radial direction of the upper rotation shaft 12, the upper damper plate 11 can be largely rotated upward by the rotation of the upper rotation shaft 12, as shown in FIG. Become. Thereby, the upper side of the upper damper plate 11 is largely separated from the air passage surface 3a of the heater core 3, and a wide air flow path is secured. At this time, the lower edge portion of the upper damper plate 11 is displaced upward.

  An upper seal member 14 is provided on the upper surface of the upper damper plate 11 on the heater core 3 side. The upper seal member 14 contacts the upper part of the air passage surface 3a of the heater core 3 when the upper pickup member 14 is in the heat pickup suppression position, thereby allowing air to flow between the upper damper plate 11 and the air passage surface 3a of the heater core 3. For example, it can be made of an elastic material such as urethane foam.

  A lower rotation shaft 22 of the lower heat pickup suppression damper 20 is disposed between the evaporator 2 and the heater core 3 at a position lower than the vertical center of the heater core 3 and extends in the left-right direction. 7 is rotatably supported by the left and right side walls. The lower damper plate 21 is formed in a rectangular shape that is long in the left-right direction, and is substantially parallel to the air passage surface 3a of the heater core 3 at the heat pickup suppression position shown in FIG. In this state, the lower edge portion of the lower damper plate 21 is located at the same height as the lower edge portion of the air passage surface 3a of the heater core 3 or below the lower edge portion of the air passage surface 3a. The upper edge portion of the lower damper plate 21 approaches or contacts the lower edge portion of the upper damper plate 11 in the vicinity of the central portion in the vertical direction of the air passage surface 3a of the heater core 3. The lower damper plate 21 is disposed closer to the heater core 3 than the lower rotation shaft 22 and is closer to the air passage surface 3a.

  The lower connection plate 23 is provided on each of the left and right sides of the lower rotation shaft 22. Each of the lower connecting plates 23 extends downward from the outer peripheral surface of the lower rotating shaft 22, then bends and extends toward the heater core 3, and the tip thereof is connected to the lower damper plate 21. Due to the shape of the lower connecting plate 23, the lower damper plate 21 can be arranged offset from the lower rotating shaft 22 in the radial direction of the lower rotating shaft 22. In addition, the positional relationship in the vertical direction between the lower rotation shaft 22 and the lower damper plate 21 is such that the lower rotation shaft 22 is below the upper edge of the lower damper plate 21 and the lower damper. It is set so as to be above the central portion in the vertical direction of the plate 21.

  Since the lower damper plate 21 is separated in the radial direction of the lower rotation shaft 22, the lower damper plate 21 can be largely rotated downward by the rotation of the lower rotation shaft 22. Thereby, the lower side of the lower damper plate 21 is largely separated from the air passage surface 3a of the heater core 3, and a wide air flow path is secured. At this time, since the upper edge portion of the lower damper plate 21 is displaced downward, an air flow path is also formed between the upper damper plate 11 and the lower damper plate 21.

  A lower seal member 24 is provided at a lower portion of the surface of the lower damper plate 21 on the heater core 3 side. The lower seal member 24 is made of the same material as that of the upper seal member 24, and contacts the lower portion of the air passage surface 3a of the heater core 3 when in the heat pickup suppression position, thereby lowering the lower damper plate 21 and the heater core 3 with each other. This is to suppress the air flow between the air passage surface 3a.

  As shown in FIG. 1, an upper link member 31, a lower link member 32, an intermediate link member 33, an arm 34, and an actuator 35 are disposed on the outer surface of the left side wall portion of the casing 7. As shown in FIG. 4, the upper link member 31 is configured to extend in the vertical direction when the upper heat pickup suppression damper 10 is in the heat pickup suppression position, and the upper portion of the upper link member 31 is the upper rotation shaft 12. It is fixed at the left end. The lower link member 32 is configured to extend in the vertical direction when the lower heat pickup suppression damper 20 is in the heat pickup suppression position, and the lower portion of the lower link member 32 is the left end portion of the lower rotation shaft 22. It is fixed to. The lower link member 32 is disposed on the left side of the upper link member 31.

  A pin 31 a that protrudes to the left is formed in the lower portion of the upper link member 31. In the upper part of the lower link member 32, an insertion hole 32a through which the pin 31a is inserted is formed. The pin 31a is rotatable in a state of being inserted through the insertion hole 32a.

  One end of the arm 34 is connected to an output shaft (not shown) extending in the left-right direction of the actuator 35. The arm 34 rotates around the output shaft. As shown in FIGS. 4 and 5, a pin 34 a that protrudes to the right is formed at the other end of the arm 34.

  The intermediate link member 33 is formed in a plate shape and is fixed to the left end portion of the upper rotating shaft 12. By moving the intermediate link member 33, the upper heat pickup suppression damper 10 can be directly driven, and the lower heat pickup suppression damper 20 can be interlocked via the upper link member 31 and the lower link member 32. The intermediate link member 33 and the upper link member 31 may be integrated.

  An opening 33 a is formed in the intermediate link member 33. The pin 34a of the arm 34 is inserted through the opening 33a. The driving force of the actuator 35 can be transmitted when the pin 34a is in sliding contact with the peripheral edge of the opening 33a. The movement of the intermediate link member 33 can be controlled by the shape of the opening 33a. In this embodiment, the upper and lower heat pickup suppression dampers 10 and 20 are fixed at the heat pickup suppression position in a state where the arm 34 is rotated downward (shown in FIG. 4), and the arm 34 is upward. The shape of the opening 33a is set so that the upper and lower heat pickup suppression dampers 10 and 20 are fixed at the ventilable position in the state of being rotated to the right (shown in FIG. 5).

  The actuator 35 is controlled so as to be interlocked with the air mix damper 4 by the air conditioning control device. When the air mix damper 4 is at the maximum cooling position, the actuator 35 operates so that the upper and lower heat pickup suppression dampers 10 and 20 are at the heat pickup suppression position. On the other hand, when the air mix damper 4 is set to a position other than the maximum cooling position, the actuator 35 is operated so that the upper and lower heat pickup suppression dampers 10 and 20 are in the ventilation possible position.

  Next, operation | movement of the vehicle air conditioner 1 comprised as mentioned above is demonstrated. First, at the time of maximum cooling, the air mix damper 4 is in the maximum cooling position as shown in FIG. Further, the arm 34 is driven downward by the actuator 35 to fix the upper and lower heat pickup suppression dampers 10 and 20 at the heat pickup suppression position. Since the amount of air flow generally increases at the maximum cooling time, the flow velocity in the cool air passage R1 is increased. At this time, since the upper damper plate 11 and the lower damper plate 21 of the upper and lower heat pickup suppression dampers 10 and 20 cover the air passage surface 3a of the heater core 3, the air in the vicinity of the heater core 3 is unlikely to be mixed into the cold air. Become. Therefore, a decrease in cooling performance is suppressed.

  Further, when the air mix damper 4 is rotated to the heating side from the maximum cooling position, the upper and lower heat pickup suppression dampers 10 and 20 are switched to the ventilable position. As a result, as shown in FIG. 3, the upper damper plate 11 and the lower damper plate 21 are greatly separated from the air passage surface 3a of the heater core 3, so that the cold air in the cold air passage R1 flows into the hot air passage R2 and is heated to air. It flows into the mix space R3. In the air mix space R3, the cool air flowing from the upper branch passage of the cold air passage R1 and the hot air flowing from the hot air passage R2 are mixed to generate conditioned air.

  When the air mix damper 4 reaches the maximum heating position as shown in FIG. 3, the entire amount of the cold air in the cold air passage R1 flows into the hot air passage R2 and is heated. In general, a large amount of air is set at this time. In the present embodiment, a plurality of upper connecting plates 13 are provided in the axial direction of the upper rotating shaft 12 so as to be spaced apart from each other, so that the cool air smoothly flows between the upper connecting plates 13 and flows into the hot air passage R2. As a result, the air flow resistance is reduced. The same applies to the lower connecting plate 23.

  As described above, according to the vehicle air conditioner 1 according to this embodiment, the upper and lower damper plates 11 and 21 in which the upper and lower heat pickup suppression dampers 10 and 20 cover the air passage surface 3a of the heater core 3. Therefore, when the evaporator 2 and the heater core 3 are arranged close to each other, it is possible to prevent the air in the vicinity of the heater core 3 from being mixed with the cold air and to prevent the cooling performance from being deteriorated. And since the upper damper plate 11 is provided in the radial direction away from the upper rotating shaft 12 disposed between the evaporator 2 and the heater core 3, the distance between the evaporator 2 and the heater core 3 is narrow. In addition, the upper damper plate 11 can be positioned so as not to cover the heater core 3 by rotating the upper damper plate 11 greatly, and thereby desired heating performance can be ensured. The same applies to the lower heat pickup suppression damper 20.

  In addition, since the plurality of upper connecting plates 13 are provided at intervals in the axial direction of the upper rotating shaft 12, the air flow resistance can be reduced. The same applies to the lower connecting plate 23.

  In addition, since the upper damper plate 11 and the lower damper plate 21 are provided with the seal members 14 and 24 in contact with the heater core 3, the effect of suppressing a decrease in cooling performance can be further enhanced.

  Further, since the upper damper plate 11 and the lower damper plate 21 extend in the direction along the air passage surface 3 a of the heater core 3, the air passage surface 3 a of the heater core 3 is reliably secured by the upper damper plate 11 and the lower damper plate 21. It is possible to cover the air so that the air in the vicinity of the heater core 3 is not mixed into the cold air.

  In the above embodiment, the upper and lower heat pickup suppression dampers 10 and 20 are provided. However, the present invention is not limited to this, and only one may be provided. In this case, the damper plate may be enlarged to correspond to the size of the air passage surface 3a.

  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 2 Evaporator (cooling heat exchanger)
3 Heater core (heat exchanger for heating)
4 Air Mix Damper 7 Casing 10 Upper Heat Pickup Suppressing Damper 11 Upper Damper Plate 12 Upper Revolving Shaft 13 Upper Connecting Plate (Connecting Portion)
14 Upper seal member 20 Lower heat pickup suppression damper 21 Lower damper plate 22 Lower rotation shaft 23 Lower connection plate (connection part)
24 Lower seal member

Claims (4)

A cooling heat exchanger in which the air passage surface extends in the vertical direction and a casing that houses the heating heat exchanger in which the air passage surface extends in the vertical direction ;
In a vehicle air conditioner provided with an air mix damper for changing the amount of air disposed in the casing and passing through the cooling heat exchanger and the heating heat exchanger,
In the casing, the cooling heat exchanger and the heating heat exchanger are arranged so as to be aligned in the air flow direction,
On the upper side between the cooling heat exchanger and the heating heat exchanger, an upper heat pickup suppression damper for suppressing air in the vicinity of the heating heat exchanger from being mixed into the cold air is disposed. ,
On the lower side between the cooling heat exchanger and the heating heat exchanger, a lower heat pickup suppression damper is arranged to prevent air in the vicinity of the heating heat exchanger from entering the cold air. Established,
The upper and lower heat pickup suppression dampers each have a rotation shaft rotatably supported on the casing between the cooling heat exchanger and the heating heat exchanger, and the rotation shaft. And a damper plate disposed on the heating heat exchanger side to cover the air passage surface of the heating heat exchanger, and the damper plate spaced apart in the radial direction of the rotation shaft. It has been closed and a connecting portion for connecting,
The vehicle air conditioner characterized in that the upper and lower heat pickup suppression dampers rotate in opposite directions around the rotation axis . In the vehicle air conditioner according to claim 1,
The vehicle air conditioner characterized in that a plurality of the connecting portions are provided at intervals in the axial direction of the rotating shaft. The vehicle air conditioner according to claim 1 or 2,
The vehicle air conditioner, wherein the damper plate is provided with a seal member that contacts the heating heat exchanger in a state of covering an air passage surface of the heating heat exchanger. In the vehicle air conditioner according to any one of claims 1 to 3,
The vehicle air conditioner characterized in that the damper plate extends in a direction along the air passage surface in a state of covering the air passage surface of the heat exchanger for heating.

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