JP2018144532A - Air conditioning device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent air of a lower side space from flowing toward an upper side space in an inner/outside air two-layer flow mode with a simple structure, when using an inner/outside air two-layer flow structure that can introduce outside air of a cabin and inside air of the cabin simultaneously.SOLUTION: In an air conditioning device for a vehicle, a heat damper 70 having an air guide plate part 75 for inhibiting air of a lower side space of a casing 10 from flowing toward an upper side space while heating air blowing ports 27a, 27b are open is provided inside the casing 10.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a vehicle air conditioner mounted on a vehicle such as an automobile, and particularly relates to a technical field of a structure including a damper for controlling an air flow flowing inside a casing.

  In general, a vehicle air conditioner is a cooling heat exchanger that cools air for air conditioning, a heat exchanger that heats air for air conditioning, an air mix damper that determines a mixing ratio of cold air and hot air, and a switching direction. For example, a damper for blowing direction switching is provided, and these are accommodated in a casing. Moreover, the vehicle air conditioner is arrange | positioned inside the instrument panel of a vehicle (for example, refer patent documents 1-3).

  An air passage through which air-conditioning air blown by a blower flows is formed inside the casing, and an air mix damper and a blowing direction switching damper are disposed in the air passage. The air mix damper changes the ratio of the amount of cold air and the amount of hot air by rotating around a rotation axis extending in the vehicle width direction, thereby generating conditioned air having a target temperature. The blower direction switching damper includes a defroster damper that opens and closes the defroster outlet, a heat damper that opens and closes the heat outlet, and the like. By opening and closing the air outlet, it is possible to supply conditioned air to a desired location in the passenger compartment.

  Further, the vehicle air conditioner of Patent Document 3 has an internal / external air two-layer flow structure in which air inside the vehicle compartment is introduced below the casing and air outside the vehicle compartment is introduced above the casing. In the vehicle air conditioner disclosed in Patent Document 3, an outside air introduction mode for introducing only air outside the passenger compartment, an inside air circulation mode for introducing only air inside the passenger compartment, and air outside the passenger compartment and air in the passenger compartment are simultaneously introduced. The mode can be automatically switched to either one of the inside / outside air two-layer flow mode.

JP 2008-62659 A JP 2012-158219 A JP-A-2015-646

  By the way, in the case of the internal / external air two-layer flow structure as in the vehicle air conditioner of Patent Document 3, the air in the vehicle interior is introduced to the lower side of the casing and the upper side in the internal / external air two-layer flow mode. After introducing the air outside the passenger compartment and adjusting the temperature of each, the air introduced to the lower side of the casing is supplied to the vicinity of the feet, while the air introduced to the upper side is supplied to the defroster outlet so that the windshield is fogged. Since heating efficiency can be improved while suppressing, compared with the vehicle air conditioners of Patent Documents 1 and 2, energy saving can be achieved.

  However, in the case of Patent Document 3, it is necessary to partition the inside of the casing into an upper side and a lower side in the inside / outside air two-layer flow mode, and therefore, how to provide the partition structure becomes a problem. Generally, the inside / outside air two-layer flow mode is a mode that is selected during heating and is not selected during cooling, so there is no need to partition the inside of the casing into an upper side and a lower side during cooling. The inside of the casing must be partitioned into an upper side and a lower side, and such a partition structure may be complicated.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a simple structure in the case of an internal / external air two-layer flow structure capable of simultaneously introducing air outside the vehicle interior and air inside the vehicle interior. Thus, the air in the lower space is prevented from flowing toward the upper space in the inside / outside air two-layer flow mode.

  In order to achieve the above object, in the present invention, the air in the lower space of the casing is prevented from flowing toward the upper space by using a heat damper that operates in accordance with the blowing mode.

  A first invention includes a casing in which a heat exchanger is accommodated, and a damper that is disposed inside the casing and controls an air flow that flows inside the casing, and only air outside the passenger compartment is supplied to the casing. Switchable between an outside air introduction mode to be introduced, an inside air circulation mode in which only air in the passenger compartment is introduced into the casing, and an inside / outside air two-layer flow mode in which air outside the passenger compartment and air in the passenger compartment are simultaneously introduced into the casing. In the configured vehicle air conditioner, an upper space and a lower side into which air outside the vehicle compartment and air inside the vehicle compartment are respectively introduced when the inside and outside air two-layer flow mode is switched to the inside of the casing. A space is provided on the upper side of the casing for supplying conditioned air to the defroster outlet for supplying conditioned air to the windshield of the vehicle and the upper body of the passenger. A vent outlet for communicating with the upper space, and a heat outlet for supplying conditioned air to the vicinity of a passenger's feet communicates with the lower space on the lower side of the casing. And has an air guide plate portion that opens and closes the heat outlet and suppresses the air in the lower space from flowing toward the upper space when the heat outlet is open. A heat damper is provided inside the casing.

  According to this configuration, when switching to the inside / outside air two-layer flow mode, for example, at the time of heating, the air outside the vehicle interior and the air inside the vehicle interior are introduced into the upper space and the lower space of the casing, respectively. After the temperature is adjusted by the exchanger, the air is supplied to each part of the passenger compartment from each outlet according to the blowing mode. At the time of heating, since the heat outlet is normally opened, the air in the passenger compartment introduced into the lower space of the casing is supplied to the vicinity of the passenger's feet from the heat outlet formed on the lower side of the casing. It will be. At this time, since the heat damper is in a state where the heat outlet is opened, the air in the lower space of the casing is prevented from flowing toward the upper space by the air guide plate portion of the heat damper. Therefore, it is possible to suppress the air in the lower space of the casing from flowing toward the upper space using the heat damper without providing a separate member or the like that operates according to the blowing mode.

  In a second aspect based on the first aspect, the heat damper has an opening / closing plate portion for opening and closing the heat outlet, and the opening / closing plate portion and the air guide plate portion are arranged apart from each other. It is characterized by being.

  According to this configuration, the heat outlet is opened and closed by the opening / closing plate portion of the heat damper. Since the opening / closing plate portion and the air guide plate portion are separated from each other, the air in the lower space is placed on the air guide plate portion while the opening / closing plate portion is disposed at a position suitable for opening and closing the heat outlet. It becomes possible to arrange at a position suitable for suppressing the flow toward the space.

  According to a third invention, in the first or second invention, the air guide plate of the heat damper is in a blowing mode in which conditioned air is supplied from the defroster outlet or the vent outlet while the heat outlet is closed. The part is arranged to extend toward the upper side of the casing.

  That is, when supplying conditioned air from the defroster outlet or the vent outlet while the heat outlet is closed, the defroster outlet and the vent outlet are formed on the upper side of the casing. The flow will be upward. At this time, since the air guide plate portion of the heat damper is arranged to extend toward the upper side of the casing, the air inside the casing can be guided to the defroster outlet and the vent outlet by the air guide plate portion. Become.

  According to a fourth invention, in any one of the first to third inventions, when the heat damper is in a state where the heat outlet is opened, the air guide plate portion is disposed at an upper portion of the lower space. It is characterized by that.

  That is, when the conditioned air is blown out from the heat outlet, the conditioned air flows from the lower space of the casing toward the heat outlet, and the main flow of the conditioned air at this time is located at a substantially intermediate portion in the vertical direction of the lower space. Will do. In this configuration, when the heat damper is in a state where the heat blower is opened, the air guide plate portion is disposed at the upper portion of the lower space, and thus is disposed where the mainstream is avoided.

  According to a fifth invention, in any one of the first to fourth inventions, the air guide plate portion is integrally formed with the heat damper.

  According to this configuration, the number of parts is reduced as compared with the case where the air guide plate portion is assembled as a separate member to the heat damper.

  A sixth invention is the invention according to any one of the first to fifth aspects, wherein the heat damper is arranged to be pivotally supported by the casing and to be separated from the pivot shaft in a radial direction. A rotary damper having an opening / closing plate connected to the rotation shaft.

  According to this configuration, the opening / closing plate is rotated around the rotation axis, whereby the heat outlet is opened / closed by the opening / closing plate. At this time, the air guide plate portion also rotates around the rotation axis, and the opening / closing plate portion and the air guide plate portion can be easily interlocked.

  According to the first invention, the heat damper having the air guide plate portion that suppresses the air in the lower space of the casing from flowing toward the upper space is provided inside the casing. It is possible to prevent the air in the lower space from flowing toward the upper space in the laminar flow mode.

  According to the second aspect of the invention, since the opening / closing plate portion and the air guide plate portion of the heat damper are arranged apart from each other, the opening / closing plate portion and the air guide plate portion can be arranged at appropriate positions.

  According to the third invention, the air guide plate portion of the heat damper is disposed so as to extend upward in the blowing mode in which conditioned air is supplied from the defroster outlet or the vent outlet while the heat outlet is closed. Therefore, the air inside the casing can be guided toward the defroster outlet and the vent outlet by the air guide plate portion, and a flow toward the defroster outlet and the vent outlet can be positively formed.

  According to the fourth invention, when the heat damper is in a state where the heat outlet is opened, the air guide plate portion can be arranged so as to avoid the main flow of conditioned air. Thereby, the flow of the conditioned air blown out from the heat outlet can be prevented from being disturbed.

  According to the fifth aspect, since the air guide plate is integrally formed with the heat damper, the number of parts can be reduced.

  According to the sixth invention, since the heat damper is a rotary damper, the opening / closing plate portion and the air guide plate portion can be easily interlocked.

It is the figure which looked at the air-conditioner for vehicles concerning an embodiment from the back side. It is a left view of the vehicle air conditioner which concerns on embodiment. It is the III-III sectional view taken on the line in FIG. 1 when a vehicle air conditioner exists in vent mode. FIG. 4 is a view corresponding to FIG. 3 when the vehicle air conditioner is in a heat mode. FIG. 4 is a view corresponding to FIG. 3 when the vehicle air conditioner is in a bi-level mode. It is the perspective view which looked at the heat damper from the right side. It is the perspective view which looked at the heat damper from the left side. It is a right view of a heat damper. It is a top view of a heat damper. It is the figure which looked at the heat damper from the opening-and-closing plate part side. It is the figure which looked at the heat damper from the air guide plate part side. It is the XII-XII sectional view taken on the line in FIG.

  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 shows a vehicle air conditioner 1 according to an embodiment of the present invention. The vehicle air conditioner 1 is attached to the vehicle body in a state of being accommodated in an instrument panel (not shown) provided in, for example, the interior of the automobile. The vehicle air conditioner 1 includes a blower unit having a blower (not shown). The air blowing unit is configured to be able to introduce only the air inside the vehicle interior and only the air outside the vehicle interior, and can simultaneously introduce the air inside the vehicle interior and the air outside the vehicle interior to blow in a two-layer flow state. ing. In the two-layer flow state, the air outside the passenger compartment is the upper layer and the air inside the passenger compartment is the lower layer. A specific example of a structure capable of blowing air in a two-layer flow state is disclosed in, for example, Patent Document 3 and the like, and detailed description thereof is omitted. The blower unit can be disposed on one side in the vehicle width direction.

  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. In this embodiment, the front, rear, left and right are defined on the assumption that the vehicle air conditioner 1 is mounted on the vehicle.

(Schematic structure of vehicle air conditioner)
For example, as shown in FIG. 3, a vehicle air conditioner 1 includes a cooling heat exchanger 2 that cools air for air conditioning, a heat exchanger 3 for heating that heats air for air conditioning, an electric heater 4, and a cooling device. An upper air mix damper 5 and a lower air mix damper 6 that determine the mixing ratio of the cold air cooled by the heat exchanger 2 and the hot air heated by the heating heat exchanger 3 and the electric heater 4, and cooling heat An air conditioner casing 10 (shown in FIG. 1 and the like) that houses the exchanger 2, the heat exchanger 3 for heating, the electric heater 4, and the air mix dampers 5 and 6 is provided.

  As shown in FIG. 2, the air conditioning casing 10 is configured to be splittable in an intermediate portion in the front-rear direction. The front side portion of the air conditioning casing 10 is configured to be split at an intermediate portion in the vertical direction, and includes an upper casing constituent member 11 and a lower casing constituent member 12. As shown in FIG. 1, the rear portion of the air-conditioning casing 10 is configured to be splittable in an intermediate portion in the left-right direction, and has a right casing component member 13 and a left casing component member 14. The upper casing constituent member 11, the lower casing constituent member 12, the right casing constituent member 13, and the left casing constituent member 14 are made of a resin material, and are fastened and integrated with each other by a fastening member or the like.

  As shown in FIG. 3, the cooling heat exchanger 2 is housed inside the upper casing component member 11 and the lower casing component member 12. Heat exchanger 3 for heating, electric heater 4 and air mix dampers 5 and 6 are housed inside right casing component 13 and left casing component 14.

  The vehicle air conditioner 1 also includes a defroster damper 20, a vent damper 21, a heat damper 70, and a rear seat vent damper 23. The defroster damper 20, the vent damper 21, the heat damper 70, and the rear seat vent damper 23 are on the right casing. The component member 13 and the left casing component member 14 are accommodated inside. The defroster damper 20, the vent damper 21, the heat dampers 70 and 80, and the rear seat vent damper 23 are blowing direction switching dampers for switching the blowing direction of the conditioned air by controlling the air flow flowing inside the air conditioning casing 10. “Controlling the air flow” means, for example, stopping the air flow or changing the air flow direction.

  That is, the vehicle air conditioner 1 generates conditioned air by mixing hot air and cold air so that the mixing ratio determined by the upper air mix damper 5 and the lower air mix damper 6 is obtained, and the generated conditioned air. Is supplied to each part of the passenger compartment according to the operation of the defroster damper 20, the vent damper 21, the heat damper 70, and the rear seat vent damper 23.

  As shown in FIG. 1 etc., the defroster blower outlet 25 which the conditioned air blows off is formed in the upper wall part (the upper side of the air conditioning casing 10) of the air conditioning casing 10. As shown in FIG. The defroster outlet 25 has a shape that is long in the left-right direction. The conditioned air blown from the defroster outlet 25 is supplied toward the inner surface of a vehicle windshield (not shown). A defroster duct (not shown) can be connected to the defroster outlet 25.

  A left vent outlet 26a, a right vent outlet 26b, and a center vent outlet 26c are formed behind the defroster outlet 25 in the upper wall portion of the air conditioning casing 10. The left vent outlet 26a opens to the left side portion of the air conditioning casing 10, and the conditioned air blown out from the left vent outlet 26a is supplied toward the upper body of the occupant seated on the left side of the front seat. The right vent outlet 26b opens to the right portion of the air conditioning casing 10, and the conditioned air blown out from the right vent outlet 26b is supplied toward the upper body of the occupant seated on the right side of the front seat. The center vent outlet 26c is open at the center in the vehicle width direction in the upper part of the air conditioning casing 10, that is, between the left vent outlet 26a and the right vent outlet 26b. The conditioned air blown from the center vent outlet 26c is mainly supplied toward the upper half of the occupant seated in the front seat. A vent duct (not shown) can be connected to the left vent outlet 26a, the right vent outlet 26b, and the center vent outlet 26c.

  As shown in FIGS. 2 and 3, the rear wall portion of the air conditioning casing 10 is formed with a front heat outlet 27 a and a rear heat outlet 27 b that are separated from each other in the vertical direction at an intermediate portion in the vertical direction. The front heat outlet 27a is opened toward the left side and the right side of the air conditioning casing 10, and the conditioned air blown out from the front heat outlet 27a is near the driver's seat side and the passenger seat side in the vicinity of the feet of the front seat occupant of the vehicle. Are supplied respectively. The rear heat outlet 27b is opened toward the left side and the right side of the air conditioning casing 10, and the conditioned air blown out from the rear heat outlet 27b is supplied to both the left and right sides in the vicinity of the feet of the rear seat passenger. A heat duct (not shown) can be connected to the front heat outlet 27a and the rear heat outlet 27b. The front heat outlet 27a is formed above the rear heat outlet 27b.

  A rear seat outlet 28 is formed below the front heat outlet 27a and the rear heat outlet 27b in the rear wall portion of the air conditioning casing 10. The conditioned air blown out from the rear seat outlet 28 is supplied to, for example, the upper body of an occupant seated in the rear seat (rear seat occupant). The rear seat outlet 28 has a shape that is long in the left-right direction, and is located in the center of the air-conditioning casing 10 in the left-right direction. A rear seat duct (not shown) extending to the vicinity of the rear seat can be connected to the rear seat outlet 28.

  As shown in FIG. 3, in the air conditioning casing 10, a cooling heat exchanger arrangement passage 30 in which the cooling heat exchanger 2 is arranged, an upper hot air passage R <b> 1, a lower hot air passage R <b> 2, An upper cold air passage 32, a lower cold air passage 33, a defroster passage 34, a vent passage 35, a heat passage 36, and a rear seat passage 37 are formed. The cooling heat exchanger arrangement passage 30 is an air passage for sending air-conditioning air blown by a blower (not shown) to the cooling heat exchanger 2.

  As shown in FIG. 3, an air inlet 24 for introducing air for air conditioning is formed in the front portion of the right side wall portion of the air conditioning casing 10. The air inlet 24 has a shape that is long in the vertical direction. A blower unit is connected to the air inlet 24. The air introduction port 24 communicates with the cooling heat exchanger arrangement passage 30.

  The cooling heat exchanger arrangement passage 30 includes an upper layer passage (upper space) 30a and a lower layer passage (lower space) 30b, and a partition extending in the left-right direction and the front-rear direction between the upper layer passage 30a and the lower layer passage 30b. A plate (not shown) can be provided. The upper layer air blown from the blower unit is introduced into the upper layer passage 30a, and the lower layer air blown from the blower unit is introduced into the lower layer passage 30b. That is, the air blown from the blower unit may be introduced into the air conditioning casing 10 in a two-layer flow state, and this introduction mode can be referred to as an inside / outside air two-layer flow mode. In addition, by the switching operation of the inside / outside air damper of the blower unit, in addition to the inside / outside air two-layer flow mode, the outside air introduction mode in which the air outside the vehicle compartment is introduced into the upper layer passage 30a and the lower layer passage 30b, and the upper layer passage 30a and the lower layer It is also switched to the inside air circulation mode in which the air in the passenger compartment is introduced into the passage 30b.

  The cooling heat exchanger arrangement passage 30 is formed in the front part inside the air conditioning casing 10. An air introduction port 24 communicates with the upstream end of the cooling heat exchanger arrangement passage 30 so that the entire amount of air-conditioning air blown from the blower unit is introduced into the cooling heat exchanger arrangement passage 30. It has become. The longitudinal cross section of the cooling heat exchanger arrangement passage 30 extends from the upper part to the lower part of the air conditioning casing 10, and extends from the left side to the right side of the air conditioning casing 10.

  The cooling heat exchanger 2 arranged in the cooling heat exchanger arrangement passage 30 is composed of an evaporator (evaporator) of a refrigeration cycle. The cooling heat exchanger arrangement passage 30 is configured such that the air passage surface extends in the vertical direction. The upper part of the cooling heat exchanger arrangement passage 30 is held by the upper casing component member 11, while the lower part of the cooling heat exchanger arrangement passage 30 is held by the lower casing component member 12. The air in the upper layer passage 30 a passes through the upper side of the cooling heat exchanger arrangement passage 30, and the air in the lower layer passage 30 b passes through the lower side of the cooling heat exchanger arrangement passage 30.

  Refrigerant depressurized via a pressure reducing valve (not shown) flows into the cooling heat exchanger arrangement passage 30 and heat exchange between the refrigerant and air-conditioning air cools the air-conditioning air. It has come to be. Condensed water generated during cooling of the air-conditioning air is discharged to the outside of the air-conditioning casing 10 from a drain portion (not shown) formed in the lower casing component 12.

  The upper hot air passage R1 and the lower hot air passage R2 are passages through which the hot air heated by the heating heat exchanger 3 flows. In this embodiment, the lower hot air passage R2 is heated by the electric heater 4. However, the warm air heated by the electric heater 4 does not circulate in the upper warm air passage R1.

  The upper hot air passage R1 and the lower hot air passage R2 are formed in an intermediate portion in the vertical direction inside the air conditioning casing 10, and extend in the front-rear direction. The area of the vertical cross section of the upper hot air passage R1 and the vertical cross section of the lower hot air passage R2 is set to be smaller than the area of the vertical cross section of the cooling heat exchanger arrangement passage 30. The upper hot air passage R1 corresponds to the upper space of the present invention and communicates with the downstream end of the upper layer passage 30a of the cooling heat exchanger arrangement passage 30. The lower hot air passage R2 corresponds to the lower space of the present invention and communicates with the downstream end of the lower layer passage 30b of the cooling heat exchanger arrangement passage 30.

  The heat exchanger 3 for heating is comprised by the heater core through which the cooling water of the engine (not shown) mounted in the vehicle flows. The air for air conditioning is heated by heat exchange between the cooling water of the engine flowing through the heat exchanger 3 for heating and the air for air conditioning. The air in the upper layer passage 30 a passes through the upper side of the heating heat exchanger 3, and the air in the lower layer passage 30 b passes through the lower side of the heating heat exchanger 3.

  The electric heater 4 has a heating element (not shown) that generates heat by supplying electric power from, for example, a vehicle battery (not shown), and air conditioning air is generated by the heat generated by the heating element. Is to be heated. The electric heater 4 may be omitted. Instead of the heat exchanger 3 for heating, an electric heater 4 may be used, or a refrigerant condenser that condenses the refrigerant may be used. Moreover, these heat sources can be used in arbitrary combinations, for example, a refrigerant condenser and the electric heater 4 can be used in combination. In the case of an electric vehicle, since there is no engine, a refrigerant condenser or an electric heater 4 can be used.

  The upper cold air passage 32 is provided in the air conditioning casing 10 above the upper hot air passage R1. The upper cold air passage 32 extends in the front-rear direction, and the upstream end communicates with the upper portion at the downstream end of the cooling heat exchanger arrangement passage 30.

  The lower cold air passage 33 is provided in the air conditioning casing 10 below the lower hot air passage R2. The lower cold air passage 33 extends in the front-rear direction, and the upstream end communicates with the lower portion at the downstream end of the cooling heat exchanger arrangement passage 30. The lower cold air passage 33 extends rearward along the bottom wall portion of the air conditioning casing 10 and then bends upward.

  The cold air cooled by the cooling heat exchanger 2 flows through the upper cold air passage 32 and the lower cold air passage 33. The cold air flowing through the upper cold air passage 32 and the lower cold air passage 33 flows by bypassing the upper hot air passage R1 and the lower hot air passage R2.

  The defroster passage 34 is provided above the upper cold air passage 32 in the air conditioning casing 10 and extends in the vertical direction. The upstream end (lower end) of the defroster passage 34 is located near the upstream end of the upper cold air passage 32. The downstream end (upper end portion) of the defroster passage 34 is connected to the defroster outlet 25.

  The vent passage 35 is provided above the upper cold air passage 32 in the air conditioning casing 10 and extends in the vertical direction. The upstream end (lower end) of the vent passage 35 is located near the upstream end of the upper cold air passage 32. The downstream end (upper end) of the vent passage 35 is connected to the left vent outlet 26a, the right vent outlet 26b, and the center vent outlet 26c.

  The rear seat passage 37 is provided in the lower part of the air conditioning casing 10 and is a passage for supplying conditioned air to the rear seat occupant. The rear seat passage 37 extends in the front-rear direction. The upstream end (front end) of the rear seat passage 37 is positioned near the downstream end of the lower cold air passage 33. The downstream end (rear end) of the rear seat passage 37 is connected to the rear seat outlet 28.

  The heat passage 36 is provided in the air conditioning casing 10 below the upper cold air passage 32 and above the lower cold air passage 33. That is, the heat passage 36 is provided above the rear seat passage 37. And the heat channel | path 36 is for supplying conditioned air to a passenger | crew's leg vicinity.

  Inside the air conditioning casing 10, an intermediate vertical wall portion 10 b extending in the vertical direction is formed in a portion farther forward than the heat exchanger 3 for heating. Further, in the air conditioning casing 10, an upper vertical wall portion 10c extending in the vertical direction is formed at a portion spaced upward from the intermediate vertical wall portion 10b. Further, in the air conditioning casing 10, a lower vertical wall portion 10d extending in the vertical direction is formed at a portion spaced downward from the intermediate vertical wall portion 10b.

  An upper opening 10e is formed between the lower end portion of the upper vertical wall portion 10c and the upper end portion of the intermediate vertical wall portion 10b, and the upper end portion of the lower vertical wall portion 10d and the intermediate vertical wall portion 10b A lower opening 10f is formed between the lower end portion. The upper air mix damper 5 operates in the upper opening 10e, and the amount of cold air flowing into the upper cold air passage 32 from the cooling heat exchanger arrangement passage 30 and the upper hot air passage R1 from the cooling heat exchanger arrangement passage 30. The ratio with the amount of cold air flowing into the upper side of the is changed.

  That is, the upper air mix damper 5 has a rotating shaft 5a extending in the left-right direction and a plate portion 5b extending in the radial direction of the rotating shaft 5a. The rotation shaft 5 a is supported so as to be rotatable with respect to the left side wall portion and the right side wall portion of the air conditioning casing 10. When the upper air mix damper 5 is fully rotated upward about the rotation shaft 5a, the amount of cold air flowing into the upper cold air passage 32 from the cooling heat exchanger arrangement passage 30 becomes 0, and the cooling heat exchanger arrangement passage 30 is obtained. The cool air flows into the upper warm air passage R1 from the upper opening 10e. On the other hand, when the upper air mix damper 5 is rotated all the way downward around the rotation shaft 5a, the amount of cold air flowing from the cooling heat exchanger arrangement passage 30 into the upper hot air passage R1 becomes zero, and the cooling heat exchanger The cold air in the arrangement passage 30 flows into the upper cold air passage 32 from the upper opening 10e.

  When the upper air mix damper 5 is in the intermediate rotational position, the cold air in the cooling heat exchanger arrangement passage 30 flows into both the upper cold air passage 32 and the upper hot air passage R1 from the upper opening 10e. The ratio between the amount of cold air flowing into the upper side cold air passage 32 and the amount of cold air flowing into the upper side hot air passage R1 and being heated is changed depending on the rotational position of the upper air mix damper 5. That is, the upper air mix damper 5 is for determining the mixing ratio between the cold air cooled by the cooling heat exchanger 2 and the hot air heated by the heating heat exchanger 3.

  The lower air mix damper 6 operates in the lower opening 10f, and the amount of cold air flowing from the cooling heat exchanger arrangement passage 30 into the lower cold air passage 33 and the cooling heat exchanger arrangement passage 30 The ratio with the amount of cold air flowing into the lower side of the lower hot air passage R2 is changed.

  That is, the lower air mix damper 6 has a rotating shaft 6a extending in the left-right direction and a plate portion 6b extending in the radial direction of the rotating shaft 6a. The rotation shaft 6 a is supported so as to be rotatable with respect to the left side wall portion and the right side wall portion of the air conditioning casing 10. When the lower air mix damper 6 is rotated all the way downward around the rotation axis 6a, the amount of cold air flowing from the cooling heat exchanger arrangement passage 30 into the lower cold air passage 33 becomes zero, and the cooling heat exchanger arrangement is performed. The cool air in the passage 30 flows into the lower hot air passage R2 from the lower opening 10f. On the other hand, when the lower air mix damper 6 is fully rotated upward around the rotation shaft 6a, the amount of cold air flowing from the cooling heat exchanger arrangement passage 30 into the lower hot air passage R2 becomes 0, and the cooling heat The cold air in the exchanger arrangement passage 30 flows into the lower cold air passage 33 from the lower opening 10f.

  When the lower air mix damper 6 is in the intermediate rotational position, the cold air in the cooling heat exchanger arrangement passage 30 flows into both the lower cold air passage 33 and the lower hot air passage R2 from the lower opening 10f. . The ratio between the amount of cold air flowing into the lower cold air passage 33 and the amount of cold air flowing into the lower hot air passage R2 and being heated is changed depending on the rotational position of the lower air mix damper 6. That is, the lower air mix damper 6 determines the mixing ratio between the cold air cooled by the cooling heat exchanger 2 and the hot air heated by the heating heat exchanger 3 (and the electric heater 4). Is.

  Inside the air conditioning casing 10, an intermediate plate portion 10g is formed on the upstream side of the heating heat exchanger 3 in the air flow direction and extends from the intermediate portion in the vertical direction of the intermediate vertical wall portion 10b toward the rear side. The intermediate plate portion 10g extends in the left-right direction. The upper side of the intermediate plate portion 10g is the upper hot air passage R1 through which the upper layer air blown from the blower unit flows, and the lower side of the intermediate plate portion 10g is the lower layer of the lower layer air blown from the blower unit. It becomes the side hot air passage R2, and the intermediate vertical wall portion 10b functions as a partition plate that partitions the interior of the air conditioning casing 10 up and down. The intermediate vertical wall portion 10b extends to the vicinity of the upstream surface of the heating heat exchanger 3 in the air flow direction.

  In addition, a downstream partition plate 17 is provided inside the air conditioning casing 10 on the downstream side in the air flow direction from the heating heat exchanger 3. The downstream partition plate 17 includes a front partition portion 17a extending rearward from the vicinity of the downstream surface in the air flow direction of the heat exchanger 3 for heating, and a rear partition portion 17b extending upward from the rear end portion of the front partition portion 17a. And have. The height of the front partitioning portion 17a is set to be substantially equal to the height of the intermediate plate portion 10g, and the upper side of the front partitioning portion 17a is the upper hot air passage R1 through which the upper layer air blown from the blower unit flows. The lower side of the front partitioning portion 17a is a lower hot air passage R2 through which the lower layer air blown from the blower unit flows. The electric heater 4 is disposed below the front partitioning portion 17a.

  The rear partitioning portion 17b is disposed so as to face the surface of the heating heat exchanger 3 on the downstream side in the air flow direction with a predetermined interval. The clearance between the rear partitioning portion 17b and the surface of the heating heat exchanger 3 on the downstream side in the air flow direction is set wide so that the air that has passed through the heating heat exchanger 3 easily flows out. Further, the rear partition portion 17b is formed so as to move away from the heating heat exchanger 3 as it goes upward, and this also facilitates the outflow of air that has passed through the heating heat exchanger 3.

  A defroster damper 20 for opening and closing the defroster passage 34 is disposed in the defroster passage 34. The defroster damper 20 has a rotation shaft 20a extending in the left-right direction and a plate portion 20b extending in the radial direction of the rotation shaft 20a. The rotating shaft 20 a is supported so as to be rotatable with respect to the left side wall portion and the right side wall portion of the air conditioning casing 10. The defroster passage 34 is opened and closed as the defroster damper 20 rotates about the rotation shaft 20a.

  A vent damper 21 for opening and closing the vent passage 35 is disposed in the vent passage 35. The vent damper 21 has a rotation shaft 21a extending in the left-right direction, and a plate portion 21b supported by the rotation shaft 21a in a state of being radially separated from the rotation shaft 21a. The rotation shaft 21 a is supported so as to be rotatable with respect to the left side wall portion and the right side wall portion of the air conditioning casing 10. The vent path 35 is opened and closed as the vent damper 21 rotates about the rotation shaft 21a.

  The rear seat passage 37 is provided with a rear seat vent damper 23 for opening and closing the rear seat passage 37. The rear-seat vent damper 23 includes a rotation shaft 23a extending in the left-right direction and a plate portion 23b extending in the radial direction from the rotation shaft 23a. The rotation shaft 23 a is supported so as to be rotatable with respect to the left side wall portion and the right side wall portion of the air conditioning casing 10. The rear seat passage damper 37 is opened and closed by rotating the rear seat vent damper 23 around the rotation shaft 23a.

  The heat damper 70 is a member for switching between a state where air flows into the heat passage 36 and a state where air does not flow by controlling the air flow. As shown in FIGS. 6 and 7 and the like, the heat damper 70 is provided integrally with the rotation shafts 71 and 71 extending in the left-right direction and the rotation shaft 71 away from the rotation shafts 71 and 71 in the radial direction. The opening / closing plate portion 72 for opening and closing the heat outlets 27a, 27b, the right end plate portion 73 provided at the right end portion of the opening / closing plate portion 72, the left end plate portion 74 provided at the left end portion of the opening / closing plate portion 72, and the air guide And a plate portion 75, which is a so-called rotary damper. The air guide plate portion 75 is integrally formed with the heat damper 70 by integrally forming the rotating shaft 71, the opening / closing plate portion 72, the right end plate portion 73, the left end plate portion 74, and the air guide plate portion 75 of the heat damper 70 with a resin material. It becomes possible. The rotating shaft 71, the opening / closing plate portion 72, the right end plate portion 73, the left end plate portion 74, and the air guide plate portion 75 of the heat damper 70 may be separately formed and then assembled and integrated. Further, a sealing material 76 made of an elastic material such as urethane foam is provided at the edge of the heat damper 70.

  The rotation shaft 71 located on the left side of the heat damper 70 protrudes to the left side of the left end plate portion 74 of the heat damper 70 and is rotatably supported on the left wall portion of the air conditioning casing 10. A rotation shaft 71 located on the right side of the heat damper 70 protrudes to the right side of the right end plate portion 73 of the heat damper 70 and is supported to be rotatable with respect to the air conditioning casing 10.

  When the air conditioning casing 10 is provided with an intermediate plate (not shown) that constitutes a part of the air conditioning casing 10, the rotation shaft 71 located on the right side of the heat damper 70 rotates with respect to the intermediate plate. It can be supported as possible. The intermediate plate is a member for partitioning the inside of the air conditioning casing 10 into a left side and a right side, and extends in the front-rear direction and the up-down direction inside the air conditioning casing 10. The space on the right side of the intermediate plate inside the air conditioning casing 10 is a space for generating conditioned air to be supplied to the right side region of the passenger compartment, and the space on the left side of the intermediate plate in the air conditioning casing 10 is on the left side of the passenger compartment. It becomes a space for generating conditioned air to be supplied to the area. That is, by providing the intermediate plate, the left and right independent temperature control type vehicle air conditioner 1 can be obtained. In this case, the heat damper 70 may be provided on each of the left and right sides. If the left and right independent temperature control type vehicle air conditioner 1 is not used, the intermediate plate may be omitted.

  The driving force of the actuator A shown in FIGS. 1 and 2 is input to the rotation shaft 71 of the heat damper 70. However, the present invention is not limited to this, and the operation force by the occupant is input. May be. The right end plate portion 73 and the left end plate portion 74 extend in the radial direction of the rotation shaft 71 and are portions for connecting the opening / closing plate portion 72 to the rotation shaft 71. The open / close plate 72 and the air guide plate 75 are disposed away from each other in the radial direction of the rotation shaft 71 and extend in the direction of the rotation shaft 71.

  In addition to the vent mode shown in FIG. 3, the heat mode shown in FIG. 4, and the bi-level mode shown in FIG. 5, the vehicle air conditioner 1 can also be used in a blowout mode such as a defroster mode or a differential / heat mode. It is configured to be switched. The blowing mode is switched by operating the defroster damper 20, the vent damper 21, the heat damper 70, and the rear seat vent damper 23. The operation of these dampers is conventionally provided by a well-known link mechanism or individually. Since it is performed by an actuator or the like, a detailed description of the drive mechanism is omitted.

(Vent mode)
In the vent mode shown in FIG. 3, the defroster damper 20 is closed, the vent damper 21 is fully opened, the heat damper 70 is fully closed, and conditioned air (warm air) is supplied to the left vent outlet 26a and the right side. In this mode, the air flows through the vent outlet 26b and the center vent outlet 26c. In the vent mode, the rear-seat vent damper 23 is opened.

  In the vent mode, the open / close plate portion 72 of the heat damper 70 is in a state of closing the front heat outlet 27a and the rear heat outlet 27b. In this state, the heat damper 70 is fully rotated to the rear side around the rotation shaft 71, and the opening / closing plate portion 72 of the heat damper 70 is in a posture extending in the vertical direction, thereby closing the inlet of the heat passage 36. The front heat outlet 27a and the rear heat outlet 27b are closed.

  In the vent mode in which the heat damper 70 closes the front heat outlet 27a and the rear heat outlet 27b and supplies conditioned air from the vent outlets 26a, 26b, and 26c, the vent outlets 26a, 26b, and 26c are located above the air conditioning casing 10. Therefore, the air flow inside the air conditioning casing 10 is directed upward. In the vent mode, the air guide plate portion 75 of the heat damper 70 is arranged to extend toward the upper side of the air conditioning casing 10. As a result, the air inside the air conditioning casing 10 can be guided in the direction of the vent outlets 26a, 26b, and 26c by the air guide plate portion 75. It can be secured.

  In the vent mode, the opening / closing plate portion 72 of the heat damper 70 closes the front heat outlet 27a and the rear heat outlet 27b, so that the posture is extended in the vertical direction. The air guide plate portion 75 also extends in the vertical direction, and the air guide plate portion 75 is disposed away from the opening / closing plate portion 72 to the front side. Therefore, the air flowing through the lower hot air passage R2 and the lower cold air passage 33 mainly flows upward from between the air guide plate portion 75 and the opening / closing plate portion 72. Further, the air guide plate portion 75 is disposed away from the heating heat exchanger 3 on the rear side.

(Defroster mode)
Although not shown, the defroster mode is a mode in which the defroster damper 20 is fully opened, the vent damper 21 is fully closed, and the heat damper 70 is fully closed so that conditioned air (warm air) flows through the defroster outlet 25. It is. Even in this defroster mode, the air flow inside the air conditioning casing 10 is directed upward, and the air guide plate portion 75 of the heat damper 70 is disposed so as to extend upward. Thereby, the air inside the air conditioning casing 10 can be guided in the direction of the vent outlets 26a, 26b, and 26c by the air guide plate portion 75, so that a sufficient amount of air can be secured from the defroster outlet 25.

(Heat mode)
In the heat mode shown in FIG. 4, the defroster damper 20 is slightly opened, the vent damper 21 is fully closed, the heat damper 70 is fully opened, and conditioned air (warm air) is supplied to the defroster outlet 25. In this mode, the air flows through the front heat outlet 27a and the rear heat outlet 27b. In the heat mode, the rear-seat vent damper 23 is closed.

  In the heat mode, the open / close plate 72 of the heat damper 70 is in a state where the front heat outlet 27a and the rear heat outlet 27b are opened. In this state, the heat damper 70 is rotated to the front side around the rotation shaft 71 as far as it will go, and the opening / closing plate portion 72 of the heat damper 70 is configured to extend in the front-rear direction, thereby opening the inlet of the heat passage 36. The front heat outlet 27a and the rear heat outlet 27b are opened.

  When the heat damper 70 is in a state where the front heat outlet 27a and the rear heat outlet 27b are opened, the front end of the air guide plate 75 is located near the rear end of the front partition 17a of the downstream partition plate 17, and the air The guide plate portion 75 is disposed so as to extend the front partition portion 17a to the rear side. At this time, since the air guide plate part 75 is positioned so as to be positioned downward as it goes to the rear side, the air in the space below the front partition part 17a is prevented from flowing toward the upper space. Further, when the heat damper 70 is in a state in which the front heat outlet 27a and the rear heat outlet 27b are opened, the air guide plate portion 75 is disposed at the upper portion of the lower hot air passage R2.

(Bi-level mode)
In the bi-level mode shown in FIG. 5, the defroster damper 20 is closed, the vent damper 21 is opened, and the heat damper 70 is opened so that conditioned air (mixed hot and cold air) is supplied to the defroster outlet 25, In this mode, the air flows through the left vent outlet 26a, the right vent outlet 26b, the center vent outlet 26c, the front heat outlet 27a, and the rear heat outlet 27b. In the heat mode, the rear-seat vent damper 23 is open.

  In the bi-level mode, the heat damper 70 rotates rearward as compared to the heat mode. Thereby, a gap is formed between the opening / closing plate portion 72 of the heat damper 70 and the rear partition portion 17b of the downstream partition plate 17, and the air flowing through the lower hot air passage R2 and the lower cold air passage 33 is It flows upward through the gap. Further, the front end portion of the air guide plate portion 75 is positioned in the vicinity of the rear end portion of the front side partition portion 17a of the downstream side partition plate 17, and the air guide plate portion 75 is arranged to extend the front side partition portion 17a to the rear side. The At this time, since the air guide plate part 75 is positioned so as to be positioned downward as it goes to the rear side, the air in the space below the front partition part 17a is prevented from flowing toward the upper space.

(Effect of embodiment)
As described above, according to the vehicle air conditioner 1 according to this embodiment, the air outside the passenger compartment and the air inside the passenger compartment are changed when the inside / outside air two-layer flow mode is switched, for example, during heating. After being introduced into the upper space and the lower space of the air-conditioning casing 10 and adjusted in temperature by the heat exchangers 2 and 3, respectively, the air outlets 25, 26a, 26b, 26c, 27a, 27b, 28 It is supplied to each part of the passenger compartment. During heating, the front heat outlet 27a and the rear heat outlet 27b are normally opened, so the air in the vehicle compartment introduced into the lower space of the air conditioning casing 10 is formed at the lower side of the air conditioning casing 10. The heat is supplied from the heat outlet 27a and the rear heat outlet 27b to the vicinity of the passenger's feet. At this time, the heat damper 70 is in a state in which the front heat outlet 27a and the rear heat outlet 27b are opened, and the air in the lower space of the air conditioning casing 10 flows toward the upper space by the air guide plate portion 75 of the heat damper 70. It is suppressed. Therefore, the air in the lower space of the air conditioning casing 70 can be prevented from flowing toward the upper space using the heat damper 70 without providing a separate member or the like that operates according to the blowing mode. The time efficiency can be increased.

  Further, since the opening / closing plate portion 72 and the air guide plate portion 75 of the heat damper 70 are arranged apart from each other, the opening / closing plate portion 72 and the air guide plate portion 75 can be arranged at appropriate positions.

  In the blow mode in which conditioned air is supplied from the defroster blow outlet 25 or the vent blow outlets 26a, 26b, 26c with the front heat blow outlet 27a and the rear heat blow outlet 27b closed, the air guide plate portion 75 of the heat damper 70 is It can arrange | position so that it may extend toward upper side. Thereby, the air inside the air conditioning casing 10 can be guided to the defroster outlet 25 and the vent outlets 26a, 26b, and 26c by the air guide plate portion 75, and the defroster outlet 25 and the vent outlets 26a, 26b, The flow toward 26c can be positively formed.

  Further, when the heat damper 70 is in a state where the front heat outlet 27a and the rear heat outlet 27b are opened, the air guide plate portion 75 can be arranged so as to avoid the main flow of conditioned air. Thereby, the flow of the conditioned air blown from the front heat outlet 27a and the rear heat outlet 27b can be prevented from being disturbed.

  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, for example, in an automobile.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 2 Cooling heat exchanger 3 Heating heat exchanger 10 Air conditioning casing 25 Defroster outlet 26a, 26b, 26c Vent outlet 27a Front heat outlet 27b Rear heat outlet 30a Upper layer passage 30b Lower layer passage 70 Heat damper 71 Rotating shaft 72 Opening / closing plate portion 75 Air guide plate portion R1 Upper hot air passage R2 Lower hot air passage

Claims (6)

A casing containing a heat exchanger;
A damper disposed inside the casing and for controlling an air flow flowing through the casing;
Outside air introduction mode for introducing only air outside the vehicle compartment into the casing, inside air circulation mode for introducing only air inside the vehicle compartment into the casing, and inside and outside air simultaneously introducing air outside the vehicle compartment and air inside the vehicle compartment into the casing In the vehicle air conditioner configured to be switchable to the two-layer flow mode,
Inside the casing, when being switched to the inside / outside air two-layer flow mode, an upper space and a lower space into which air outside the vehicle compartment and air inside the vehicle compartment are respectively introduced are provided,
On the upper side of the casing, a defroster outlet for supplying conditioned air to the windshield of the vehicle and a vent outlet for supplying conditioned air to the upper body of the occupant are formed so as to communicate with the upper space, respectively.
On the lower side of the casing, a heat outlet for supplying conditioned air to the vicinity of the passenger's feet is formed so as to communicate with the lower space,
A heat damper having an air guide plate portion that opens and closes the heat outlet and suppresses air in the lower space from flowing toward the upper space when the heat outlet is open. A vehicle air conditioner provided inside the vehicle. In the vehicle air conditioner according to claim 1,
The heat damper has an opening / closing plate part for opening and closing the heat outlet,
The vehicle air conditioner characterized in that the opening / closing plate portion and the air guide plate portion are disposed apart from each other. The vehicle air conditioner according to claim 1 or 2,
In the blowing mode in which conditioned air is supplied from the defroster outlet or the vent outlet with the heat outlet closed, the air guide plate portion of the heat damper is arranged to extend toward the upper side of the casing. An air conditioner for a vehicle. In the vehicle air conditioner according to any one of claims 1 to 3,
The vehicle air conditioner, wherein the air guide plate portion is disposed in an upper portion of the lower space when the heat damper is in a state where the heat outlet is opened. In the vehicle air conditioner according to any one of claims 1 to 4,
The air conditioner for vehicles, wherein the air guide plate portion is integrally formed with the heat damper. In the vehicle air conditioner according to any one of claims 1 to 5,
The heat damper is a rotary damper having a rotation shaft that is rotatably supported by the casing, and an opening / closing plate portion that is disposed radially away from the rotation shaft and is connected to the rotation shaft. An air conditioner for a vehicle.

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