JP2018047711A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress deviation between a temperature of blown-out air to a front side in a cabin, and a temperature of blown-out air to a rear seat in the cabin, in an air conditioner for a vehicle having a rear seat opening part at an intermediate case member in an air-conditioning case.SOLUTION: A cold air bypass passage 15 for making air passing an evaporator 12 bypass a heat core 13 and flow is formed in an air-conditioning case 11. Front seat opening parts 30 for making air flow out to a front seat side in a cabin are formed at a pair of case members 111, 112, and a rear seat opening part 31 for making air flow out to a rear seat side in the cabin is formed at an intermediate case member 113. Then, a guide member 40 for introducing the air passing the evaporator 12 to the rear seat opening part 31 side is arranged in a space which constitutes a second cold air bypass passage 15 in the intermediate case member 113.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle air conditioner.

  Conventionally, an air conditioning case for a vehicle air conditioner has a configuration in which an intermediate case member is interposed between a pair of case members, so that only an intermediate case member is changed to realize air conditioning cases of various sizes. (For example, refer to Patent Document 1).

  In this Patent Document 1, a front seat foot opening is formed in a pair of case members so that the opening area of each opening does not change due to a change in the dimensions of the intermediate case, and the like. A foot opening for a seat is formed.

JP 2011-207279 A

  However, in the configuration in which the rear seat opening is formed with respect to the intermediate case member as in Patent Document 1, if the width of the intermediate case is reduced, the air flowing toward the rear seat opening in the air conditioning case is reduced. The air passage becomes narrow. As a result, the air flow is biased toward the front seat opening.

  In particular, in an air-mix type vehicle air conditioner that mixes cold air and hot air to adjust the temperature of the air blown into the passenger compartment, the flow of the cold air is reduced when the air passage of the cold air toward the opening for the rear seat becomes narrower However, it is greatly biased toward the opening for the front seat.

  For this reason, the temperature of the air flowing through the opening for the front seat is lower than the temperature of the air flowing through the opening for the rear seat, and the blowing temperature to the front seat side of the vehicle interior and the blowing to the rear seat side of the vehicle interior The temperature deviates greatly. The reason is presumably that cold air has higher air density and higher inertial force than hot air. In other words, when the flow of cold air is biased toward the opening for the front seat, the warm air flowing toward the opening for the front seat flows so as to be pushed out toward the opening for the rear seat by the cold air having a large inertia force, It is considered that the temperature of the air flowing through the opening for the front seat is lower than the temperature of the air flowing through the opening for the rear seat.

  In view of the above points, the present invention provides a vehicle air conditioner in which an opening for a rear seat is provided in an intermediate case member of an air conditioning case, and a blowout temperature toward the front seat side of the vehicle interior and a blowout temperature toward the rear seat side of the vehicle interior. The purpose is to suppress the divergence.

  The present invention provides an air conditioning case (11, 11A, 11B) that forms an air passage for air to be blown into a vehicle interior by interposing an intermediate case member (113) between a pair of case members (111, 112), and an air conditioning A vehicle that includes a cooling member (12) that cools air flowing through an air passage and is disposed in an air conditioning case, and a heating member (13, 28) that heats air that has passed through the cooling member. Intended for air conditioners.

  In order to achieve the above object, in the first aspect of the present invention, the air conditioning case is provided with a cold air bypass passage (15) for allowing the air that has passed through the cooling member to flow around the heating member, and the cold air bypass passage is provided. A plurality of openings (23, 25, 30, 31) through which the cool air that has passed and the warm air that has passed through the heating member flow out are formed, and the plurality of openings are formed in a pair of case members and It includes a front seat opening (30) that allows air to flow out to the front seat side, and a rear seat opening (31) that is formed in the intermediate case member and allows air to flow out to the rear seat side of the vehicle interior. The intermediate case member is characterized in that a guide member (40) for guiding the air that has passed through the cooling member to the rear seat opening side is disposed in a space that forms the cold air bypass passage.

  Thus, in this invention, the structure which arrange | positions the guide member which guides the air which passed the cooling member to the opening part side for rear seats in the space which comprises the cold wind bypass channel in an intermediate | middle case member is employ | adopted. According to this, even if the rear seat opening is provided in the intermediate case member, the air that has passed through the cooling member can be guided to the rear seat opening. Deviation from the temperature at the rear seat can be suppressed.

  In addition, the code | symbol in the parenthesis of each means described in this column and the claim shows an example of a correspondence relationship with the specific means described in the embodiment described later.

It is an air-conditioning case of the vehicle air conditioner which concerns on 1st Embodiment, Comprising: It is an external appearance perspective view which shows the example which used the reference | standard intermediate | middle case member as an intermediate | middle case member. It is an air-conditioning case of the vehicle air conditioner which concerns on 1st Embodiment, Comprising: It is an external appearance perspective view which shows the example which used the expansion-contraction intermediate | middle case member as an intermediate | middle case member. It is sectional drawing by the side of the intermediate case member in the air conditioning unit of the vehicle air conditioner which concerns on 1st Embodiment. It is sectional drawing by the side of a pair of case member in the air-conditioning unit of the vehicle air conditioner which concerns on 1st Embodiment. It is typical sectional drawing of the air conditioning unit of the vehicle air conditioner which concerns on 1st Embodiment. It is VI-VI sectional drawing of FIG. FIG. 7 is an arrow view in the direction of arrow VII in FIG. 5. It is explanatory drawing for demonstrating the magnitude | size of the 2nd cold wind bypass channel of the intermediate | middle case member in a reference | standard case and an expansion-contraction case. It is a perspective view which shows the guide member of 1st Embodiment. It is a schematic diagram which shows the flow of the cold wind in the 2nd cold wind bypass channel of 1st Embodiment. It is a schematic diagram which shows the flow of the cold wind in the 2nd cold wind bypass channel in a comparative example. It is explanatory drawing explaining the blowing temperature of the vehicle interior front seat side, and the vehicle interior rear seat side blowing temperature in a comparative example. It is explanatory drawing explaining the blowing temperature of the vehicle interior front seat side and the vehicle interior rear seat side blowing temperature in 1st Embodiment. It is a perspective view which shows the guide member of 2nd Embodiment. It is a perspective view which shows the guide member of 3rd Embodiment. It is a perspective view which shows the guide member of 4th Embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. Note that, in each of the following embodiments, parts that are the same as or equivalent to the matters described in the preceding embodiment are denoted by the same reference numerals, and the description thereof may be omitted. Moreover, in each embodiment, when only a part of the component is described, the component described in the preceding embodiment can be applied to the other part of the component.

(First embodiment)
First, the first embodiment will be described. The vehicle air conditioner of the present embodiment is roughly divided into two parts, a blower unit (not shown) and an air conditioning unit 10. The blower unit is arranged offset from the central portion inside the instrument panel in the passenger compartment to the passenger seat side. On the other hand, the air-conditioning unit 10 is arrange | positioned in the approximate center part of the left-right direction in the inner side of the instrument panel in a vehicle interior.

  As is well known, the blower unit has a blower case forming its outer shell, an inside / outside air switching box for switching between inside air (vehicle compartment air) and outside air (vehicle compartment outside air), and air introduced from the inside / outside air switching box. It is comprised from the air blower etc. which ventilate. The blower of the present embodiment blows air by rotating a centrifugal multiblade fan with an electric motor.

  As shown in FIGS. 1 and 2, the air conditioning unit 10 includes an air conditioning case 11 that forms an outer shell and forms an air passage through which air blown from the blower unit flows toward the vehicle interior. The air conditioning case 11 is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength. 1 and 2, arrows indicating front and rear, left and right, and up and down indicate the vehicle front-rear direction, the vehicle left-right direction, and the vehicle up-down direction when the air conditioning unit 10 is mounted on the vehicle. The same applies to the drawings other than FIGS. 1 and 2.

  The air conditioning case 11 of the present embodiment is formed by a pair of case members 111 and 112 that constitute both side walls in the vehicle left-right direction, and an intermediate case member 113 that is interposed between the pair of case members 111 and 112. . That is, the air conditioning case 11 of the present embodiment has two dividing surfaces extending in the vertical direction at positions spaced apart from the center by a predetermined distance. The air conditioning case 11 can be divided into a pair of case members 111 and 112 and an intermediate case member 113 on two dividing surfaces. In addition, the site | part which contact | abuts to a pair of case members 111 and 112 in a pair of intermediate case member 113 becomes a shape which fits the division surface of each case member 111,112.

  The pair of case members 111 and 112 and the intermediate case member 113 are coupled by fastening means (not shown) such as a metal spring, a clip, and a screw in a state in which various components constituting the air conditioning unit 10 are accommodated therein. Yes.

  The intermediate case member 113 of the present embodiment is a member for adjusting the interval width between the pair of case members 111 and 112 according to the difference in the vehicle size and the difference in the physiques of various components built in the air conditioning case 11. In other words, the air-conditioning case 11 selectively interposes the intermediate case member 113 having different left and right widths on the dividing surface of the pair of case members 111 and 112, thereby making it possible to make a difference in the vehicle size and the difference in the size of various built-in components. Accordingly, the physique of the air conditioning case 11 can be adjusted.

  As the intermediate case member 113, for example, a reference intermediate case member 113A having the left-right width shown in FIG. 1 as the reference width L1, and a left-right width shown in FIG. Is selectable.

  In the present embodiment, an example in which the air conditioning case 11 is formed using the reference intermediate case member 113A shown in FIG. 1 as the intermediate case member 113 will be described. An air conditioning case formed by applying the telescopic intermediate case member 113B as the intermediate case member 113 is a reference example of the present embodiment.

  Hereinafter, for convenience of explanation, the air conditioning case 11 using the reference intermediate case member 113A shown in FIG. 1 is referred to as a reference case 11A, and the air conditioning case 11 using the extension intermediate case member 113B shown in FIG. Sometimes called.

  The reference case 11A and the expansion / contraction case 11B differ only in the width dimension and shape in the vehicle left-right direction of the intermediate case member 113 interposed between the pair of case members 111 and 112, and the shape of the pair of case members 111 and 112, etc. Are equivalent. That is, the pair of case members 111 and 112 can be shared by the reference case 11A and the extendable case 11B.

  Next, the internal structure of the air conditioning case 11 in the air conditioning unit 10 will be described with reference to FIGS. FIG. 3 shows the internal structure on the intermediate case member 113 side, and FIG. 4 shows the internal structure on the pair of case members 111 and 112 side.

  An air inlet (not shown) is formed on the side surface of the portion of the air conditioning case 11 closest to the front side of the vehicle. Air blown from the blower case of the blower unit described above flows into the air inlet.

  In the air conditioning case 11, an evaporator 12 is disposed immediately after the air inlet. The evaporator 12 is one of devices constituting a vapor compression refrigeration cycle (not shown). The evaporator 12 is a cooling member that cools the blown air by evaporating the low-pressure refrigerant in the refrigeration cycle and exerting an endothermic action.

  A heater core 13 is arranged on the downstream side (vehicle rear side) of the air flow of the evaporator 12. The heater core 13 is a heating member that heats the cold air that has passed through the evaporator 12. In the heater core 13, high-temperature cooling water circulating in an engine cooling water circuit (not shown) flows therein, and heats the air using the cooling water as a heat source.

  The heater core 13 has a heat exchanging core composed of a tube through which cooling water passes and fins joined to the tube. The air flow path of the core part of the heater core 13 is divided into an upper flow path 13a and a lower flow path by a front partition wall 16 located on the front side of the core part and a rear partition wall 17 located on the rear side of the core part. 13b. Each partition wall 16 and 17 is formed in the air conditioning case 11 so as to extend over the entire region in the vehicle width direction (the direction perpendicular to the plane of FIG. 3 and FIG. 4).

  A first cold air bypass passage 14 is formed on the upper end side of the heater core 13 to allow the cold air that has passed through the evaporator 12 to flow around the heater core 13. A second cold air bypass passage 15 is formed on the lower end side of the heater core 13 to allow the cold air that has passed through the evaporator 12 to flow around the heater core 13.

  Moreover, between the heater core 13 and the evaporator 12, the 1st, 2nd air mix doors 18 and 19 which function as a temperature adjustment means are arrange | positioned. The first air mix door 18 adjusts the air volume ratio between the warm air heated by the upper flow path 13 a of the heater core 13 and the cold air that has passed through the first cold air bypass passage 14. The warm air that has passed through the upper flow path 13a of the heater core 13 and the cold air that has passed through the first cold air bypass passage 14 are mixed by the first air mixing unit 20 so as to be air at a desired temperature.

  The second air mix door 19 adjusts the air volume ratio between the warm air heated in the lower flow path 13 b of the heater core 13 and the cold air passing through the second cold air bypass passage 15. The hot air that has passed through the lower flow path 13b of the heater core 13 and the cold air that has passed through the second cold air bypass passage 15 are mixed by the second air mixing unit 21 so as to be air at a desired temperature.

  Each of the air mix doors 18 and 19 of the present embodiment is configured by a slide door that slides along the front surface of the evaporator 12. Each air mix door 18, 19 is connected to an actuator (not shown), and the slide position can be adjusted by the actuator.

  The vehicle air conditioner of the present embodiment can adjust the air in the air conditioning case 11 to different temperatures in the vertical direction by independently adjusting the door openings of the air mix doors 18 and 19.

  A first hot air passage 22 through which the warm air that has passed through the upper flow path 13a flows is formed on the air flow downstream side (vehicle rear side) of the heater core 13 in the air conditioning case 11. The downstream side (upper side) of the first hot air passage 22 merges with the downstream side of the first cold air bypass passage 14 to form a first air mixing unit 20 that mixes cold air and hot air.

  On the upper surface of the air conditioning case 11, a defroster opening 23 is opened at a site adjacent to the first air mixing unit 20. Air whose temperature is adjusted by the first air mixing unit 20 flows into the defroster opening 23. The defroster opening 23 is connected to a defroster outlet through a defroster duct (not shown). The air that has passed through the defroster opening 23 is blown out from the defroster outlet toward the inner surface of the vehicle front window glass.

  The defroster opening 23 is switched by a defroster door 24. The defroster door 24 is provided close to the upper surface of the air conditioning case 11. The defroster door 24 is configured by a cantilever door that is rotated by a rotation shaft that is disposed in the left-right direction of the vehicle. The defroster door 24 is connected to an actuator (not shown) and is rotated by the actuator.

  In addition, a front seat face opening 25 is opened on the upper surface portion of the air conditioning case 11 at a site on the vehicle rear side (occupant side) with respect to the defroster opening 23. The air adjusted in temperature by the first air mixing unit 20 flows into the front seat face opening 25. The front seat face opening 25 is connected to a face air outlet disposed on the upper side of the instrument panel via a face duct (not shown). The air that has passed through the front seat face opening 25 is blown out from the face outlet toward the upper body of the passenger in the front seat of the vehicle interior.

  The front seat face opening 25 is switched by a face door 26. The face door 26 is provided in the vicinity of the upper surface portion of the air conditioning case 11. The face door 26 is composed of a rotary door that is rotated by a rotating shaft that is disposed in the left-right direction of the vehicle. The face door 26 is connected to an actuator (not shown) and is rotated by the actuator.

  A second hot air passage 27 through which the hot air that has passed through the lower flow path 13 b of the heater core 13 flows is formed below the rear partition wall 17. The air flow downstream side (vehicle rear side) of the second hot air passage 27 merges with the downstream side of the second cold air bypass passage 15 to form a second air mixing unit 21 that mixes cold air and hot air. .

  An electric heater 28 constituting a heating member is disposed in the second hot air passage 27 of the present embodiment. As the electric heater 28, for example, a PTC heater that generates heat by energizing the PTC element can be employed.

  A foot opening 29 is opened at a position close to the second air mixing unit 21 at the vehicle rear portion of the air conditioning case 11. Air whose temperature is adjusted by the second air mixing unit 21 flows into the foot opening 29.

  On the downstream side of the air flow of the foot opening 29, a front seat foot opening 30 and a rear seat opening 31 constituting the front seat opening are opened. That is, in the present embodiment, the front seat foot opening 30 and the rear seat opening 31 are formed on the downstream side of the common opening called the foot opening 29.

  Air whose temperature is adjusted by the second air mixing unit 21 flows into the front seat foot opening 30 through the foot opening 29. The front seat foot opening 30 of the present embodiment opens in a pair of case members 111 and 112 of the air conditioning case 11 as shown in FIGS. 1 and 2. The air that has passed through the front seat foot opening 30 is blown out to the lower half of the occupant in the front seat through the front seat foot outlets on the left and right sides (not shown).

  The air adjusted in temperature by the second air mixing unit 21 flows into the rear seat opening 31 through the foot opening 29. The rear seat opening 31 of the present embodiment opens in the intermediate case member 113 of the air conditioning case 11 as shown in FIGS. The rear seat opening 31 is connected via a connection duct 32 to a rear seat face blowout port (not shown) or a rear blower foot blower (not shown). The air that has passed through the rear seat opening 31 is blown out from the rear seat face outlet or the rear seat foot outlet toward the rear seat occupant.

  The connection duct 32 is a duct extending from the vicinity of the instrument panel to the vicinity of the lower part of the front seat of the vehicle interior, and serves as a ventilation resistance for the air flowing out from the opening 31 for the rear seat. For this reason, the airflow resistance is greater on the downstream side of the rear seat opening 31 than on the downstream side of the front seat foot opening 30.

  The rear partition wall 17 extends to the vicinity of the vehicle rear side wall surface of the air conditioning case 11 and functions as a partition wall that partitions the first and second air mixing portions 20 and 21. The rear partition wall 17 is formed with a face foot communication port 33 that communicates the first and second air mixing portions 20 and 21.

  A foot door 34 that selectively opens and closes the foot opening 29 and the face foot communication port 33 is disposed at the vehicle rear portion of the air conditioning case 11. The foot door 34 is connected to an actuator (not shown) and is rotated by this actuator.

  Here, as shown in FIG. 6, the intermediate case member 113 of the present embodiment is provided with a left and right partition wall 35 extending in the vertical direction at the center in the left and right direction. The air passages 14, 15, 22, and 27 inside the air conditioning case 11 are partitioned into a left passage 36 (14 a, 15 a, 22 a, 27 a) and a right passage 37 (14 b, 15 b, 22 b, 27 b) by the left and right partition walls 35. It has been. Each of the air mix doors 18 and 19 of the present embodiment is configured such that the temperature of the air flowing through the left passage 36 and the right passage 37 can be individually adjusted.

  FIG. 7 shows a schematic internal structure of the air conditioning case 11 when the foot opening 29 is viewed from the second cold air bypass passage 15 side. As shown in FIG. 7, the foot opening 29 of the present embodiment is divided into left and right openings 29 a and 29 b by a left and right partition wall 35. The foot opening 29 is formed across the pair of case members 111 and 112 and the intermediate case member 113. Each of the openings 29a and 29b of the foot opening 29 according to the present embodiment is formed by a combination of an opening formed in the intermediate case member 113 extending left and right and an opening formed in the pair of case members 111 and 112 extending up and down. Is formed.

  Here, FIG. 8 shows a view in which the foot opening 29 is seen from the second cold air bypass passage 15 side in the reference case 11A above the paper surface, and a foot opening from the second cold air bypass passage 15 side in the telescopic case 11B below the paper surface. The figure which looked at the part 29 is shown.

  As shown in FIG. 8, the left and right width L1 of the intermediate case member 113 in the reference case 11A is shorter than the left and right width L2 of the intermediate case member 113 in the extendable case 11B. For this reason, in the reference case 11A, the second cold air bypass passage 15 becomes narrower than the expandable case 11B due to the dimensional difference ΔL (= L2−L1) between the left and right widths. At this time, the passage width of the second cold air bypass passage 15 does not change on the side of the pair of case members 111 and 112 in which the front seat foot opening 30 is formed, and the intermediate case member in which the rear seat opening 31 is formed. The 113 side becomes narrower.

  As a result, in the reference case 11A, the cold air passing through the second cold air bypass passage 15 is difficult to flow to the rear seat opening 31 side, and flows biased to the front seat foot opening 30 side. Such a bias of the cold air is not preferable because it causes the temperature of the air flowing into the front seat foot opening 30 and the rear seat opening 31 to deviate.

  Therefore, in the present embodiment, as shown in FIG. 9, the cold air flowing through the second cold air bypass passage 15 is guided to the rear seat opening 31 side in the space constituting the second cold air bypass passage 15 in the intermediate case member 113. A guide member 40 is disposed.

  The guide member 40 of the present embodiment includes a rectifying plate 41 extending toward the rear seat opening 31 along the connecting portion between the intermediate case member 113 and the pair of case members 111 and 112, and a frame body that supports the rectifying plate 41. 42.

  As shown in FIGS. 3 and 4, the rectifying plate 41 is disposed in the second cold air bypass passage 15 formed downstream of the second air mix door 19 and upstream of the second air mixing portion 21. Yes. The rectifying plate 41 of the present embodiment is provided on the dividing surface (left and right end portions) of the intermediate case member 113.

  The rectifying plate 41 is configured by a plate member that extends from the upper wall surface to the lower wall surface of the second cold air bypass passage 15. For this reason, the second cold air bypass passage 15 of the present embodiment is divided in the left-right direction by the rectifying plate 41.

  The frame body 42 is disposed inside the rectifying plate 41 in the second cold air bypass passage 15. The frame body 42 is connected to the rectifying plate 41 so that the rectifying plate 41 can be supported. The frame body 42 preferably has a shape extending along the upper wall surface and the lower wall surface of the second cold air bypass passage 15 in order to suppress the ventilation resistance of the second cold air bypass passage 15.

  Further, the guide member 40 of the present embodiment has an engaging portion 43 that engages with a support wall that supports the heater core 13 in the intermediate case member 113. The engaging portion 43 of this embodiment is provided on the rectifying plate 41. The guide member 40 is detachably attached to the intermediate case member 113 by the engaging portion 43.

  Then, the electric control part of the vehicle air conditioner of this embodiment is demonstrated. The air-conditioning control device (not shown) includes a microcomputer including various memories such as a CPU, a ROM, and a RAM and its peripheral circuits. The air conditioning control device performs various arithmetic processes based on the control program stored in the memory, and controls the operation of various devices connected to the output side.

  On the input side of the air-conditioning control device, there is a sensor group such as an inside air sensor that detects the temperature inside the vehicle, an outside air sensor that detects the outside temperature of the vehicle, a solar sensor that detects the amount of solar radiation inside the vehicle, The operation panel to be arranged is connected.

  Next, the operation of the vehicle air conditioner according to the present embodiment having the above configuration will be described. In the vehicle air conditioner, when the operation signal is input from the operation panel in the vehicle operating state, the air conditioning control device executes the control program. Thereby, an air-conditioning control apparatus reads the detection signal of a sensor group, and the operation signal of an operation panel, and controls the action | operation of various apparatuses based on these signals.

  Specifically, the air conditioning control device calculates a target blowing temperature of the air blown into the passenger compartment based on the detection signal of the sensor group and the operation signal of the operation panel. And an air-conditioning control apparatus determines the control state of the electric motor of a blower unit, the actuator of each door 18, 19, 24, 26, 34, etc. based on target blowing temperature, and the determined control state is obtained. Output control signals to various actuators.

  The air conditioning control device controls the electric motor so that the blower unit has a maximum blown air amount when the target blowing temperature is extremely low or extremely high. Then, the electric motor is controlled so that the blown air amount of the blower unit decreases as the target blowing temperature approaches the intermediate temperature. The air conditioning controller energizes the electric heater 28 when the outside air temperature is equal to or lower than a predetermined reference outside air temperature.

  Further, the air conditioning control device determines the door openings of the air mix doors 18 and 19 based on the target blowing temperature and the detected value of the sensor group, and controls the actuator so that the determined door opening is obtained. In the present embodiment, the state in which the hot air passages 22 and 27 are fully closed by the air mix doors 18 and 19 is the maximum cooling state (Max Cool), and the door opening at this time is 0%. Yes. In the present embodiment, the state where the cold air bypass passages 14 and 15 are fully closed by the air mix doors 18 and 19 is the maximum heating state (MaxHot), and the door opening at this time is 100%. ing.

  The air conditioning control device opens each of the openings 23, 25, and 29 so that the blowing mode is shifted from the face mode to the bi-level mode to the foot mode as the target blowing temperature rises from the low temperature range to the high temperature range. The actuator of each door 24, 26, 34 to open and close is controlled.

  Here, the face mode is a blowing mode in which the front seat face opening 25 is opened by the face door 26 and air is blown toward the upper body of the passenger in the vehicle interior. The bi-level mode is a blow-off mode in which both the front seat face opening 25 and the foot opening 29 are opened by the face door 26 and the foot door 34, and air is blown toward the upper body and feet of the passengers in the passenger compartment. is there. The foot mode is a blowing mode in which the foot opening 29 is opened by the foot door 34 and air is blown toward the feet of the passengers in the passenger compartment.

  The vehicle air conditioner of the present embodiment can be switched to the defroster mode when the occupant turns on the defroster switch on the operation panel. In the defroster mode, the defroster opening 23 is opened by the defroster door 24 and air is blown out toward the inner surface of the vehicle window glass.

  Moreover, the vehicle air conditioner of this embodiment can be switched to the rear seat air conditioning mode when the occupant turns on the rear seat switch of the operation panel. The rear seat air conditioning mode is a blowout mode in which the foot opening 29 is opened by the foot door 34 and air is blown out toward the rear seat through the rear seat opening 31.

  As described above, in the vehicle air conditioner according to the present embodiment, appropriate air conditioning in the vehicle compartment can be realized by switching various blowing modes in accordance with detection signals of various sensor groups.

  In particular, in the present embodiment, the guide member 40 that guides the cold air flowing through the second cold air bypass passage 15 to the rear seat opening 31 side is disposed in the space constituting the second cold air bypass passage 15 in the intermediate case member 113. Yes. According to this, even if the rear seat opening 31 is provided in the intermediate case member 113, the air that has passed through the evaporator 12 can be guided to the rear seat opening 31, and blown out to the vehicle front seat. Deviation between the air blowing temperature and the air blowing temperature blown toward the rear seat side of the vehicle interior can be suppressed.

  This point will be described with reference to FIGS. FIG. 10 is a schematic cross-sectional view showing the flow of air in the second cold air bypass passage 15, and has a configuration (this embodiment) in which the rectifying plate 41 of the guide member 40 is arranged in the second cold air bypass passage 15. Show. FIG. 11 is a schematic cross-sectional view showing the air flow in the second cold air bypass passage 15 and shows a configuration (comparative example) in which the rectifying plate 41 of the guide member 40 is not arranged in the second cold air bypass passage 15. ing. FIG. 10 corresponds to the XX cross-sectional view of FIG.

  As shown in FIG. 10, in the configuration of the present embodiment, the air passing through the second cold air bypass passage 15 flows toward the rear seat opening 31 along the wall surface of the rectifying plate 41 of the guide member 40. For this reason, in the configuration of the present embodiment, even if the air passage of the intermediate case member 113 that guides air to the rear seat opening 31 side is narrow, the air passing through the second cold air bypass passage 15 is passed through the front seat foot. It is possible to appropriately flow through both the opening 30 and the rear seat opening 31.

  On the other hand, in the configuration of the comparative example, as shown in FIG. 11, the air passing through the second cold air bypass passage 15 is narrow due to the narrow air passage of the intermediate case member 113 that flows air to the rear seat opening 31 side. It flows biased toward the front seat foot opening 30 side.

  Accordingly, in the comparative example, as shown in FIG. 12, the temperature of the air blown out to the front seat of the passenger compartment through the front seat foot opening 30 is changed to the rear seat side of the passenger compartment through the rear seat opening 31. The temperature is lower than the blowing temperature of the blowing air.

  The reason is presumably that cold air has higher air density and higher inertial force than hot air. In other words, in the second cold air bypass passage 15, if the flow of cold air is biased toward the front seat foot opening 30, the warm air flowing toward the front seat foot opening 30 via the second air mixing portion 21 becomes the inertial force. Pushed to the rear seat opening 31 side by a large cold air. As a result, the temperature of the air flowing into the front seat foot opening 30 is considered to be lower than the temperature of the air flowing into the rear seat opening 31.

  On the other hand, in the configuration of the present embodiment, the air passing through the second cold air bypass passage 15 can be appropriately passed through both the front seat foot opening 30 and the rear seat opening 31. For this reason, the temperature of the air flowing into the front seat foot opening 30 can be made equal to the temperature of the air flowing into the rear seat opening 31.

  As a result, in the configuration of the present embodiment, as shown in FIG. 13, it is possible to suppress a difference between the blowing temperature of the air blown to the front seat side of the vehicle interior and the blowing temperature of the air blown to the rear seat side of the vehicle interior. The horizontal axis in FIGS. 12 and 13 indicates the door opening degree of the second air mix door 19, and the left side indicates the MaxCool state and the right side indicates the MaxHot state.

  In the present embodiment, the guide member 40 includes a rectifying plate 41 extending toward the rear seat opening 31 side. According to this, the cold air flowing through the second cold air bypass passage 15 can be guided along the plate surface of the rectifying plate 41 to the rear seat opening 31 side. Note that the rectifying plate 41 of the guide member 40 may have a plurality of sheets instead of only one.

  Furthermore, the guide member 40 of the present embodiment is configured to be detachable from the intermediate case member 113 so that the guide member 40 can be disposed at an arbitrary position in the second cold air bypass passage 15. According to this, the guide member 40 can be shared by various intermediate case members 113 such as the reference intermediate case member 113A and the extendable intermediate case member 113B.

  Further, in the vehicle air conditioner of the present embodiment, the ventilation resistance is greater on the downstream side of the rear seat opening 31 than on the downstream side of the front seat foot opening 30. In such a vehicle air conditioner, air does not easily flow to the rear seat opening 31 due to the ventilation resistance downstream of the rear seat opening 31, and the air passing through the second cold air bypass passage 15 does not flow into the front seat foot. It tends to flow unevenly toward the opening 30 side.

  Accordingly, the downstream side of the rear seat opening 31 has a rear seat in the second cold air bypass passage 15 of the intermediate case member 113 with respect to the vehicle air conditioner in which the ventilation resistance is larger than the downstream side of the front seat foot opening 30. A configuration in which the guide member 40 guided to the opening 31 side is suitable.

  Here, in order to make the blowout temperature on the front seat side of the vehicle interior equal to the blowout temperature on the rear seat side of the vehicle interior, an air passage extending from the downstream side of the second air mix door 19 to the front seat foot opening 30 is provided. A configuration in which an air passage leading to the rear seat opening 31 is partitioned by a partition wall is conceivable.

  However, with such a passage configuration, the air passage on the downstream side of the second air mix door 19 becomes narrow, and there is a concern about an increase in ventilation resistance. Therefore, as in the present embodiment, the guide member 40 is limited to the second cold air bypass passage 15 formed downstream of the second air mix door 19 and upstream of the second air mixing unit 21. It is preferable to arrange.

(Second Embodiment)
Next, a second embodiment will be described. In this embodiment, the point which has eliminated the frame 42 of the guide member 40 is different from 1st Embodiment. In the present embodiment, description of the same or equivalent parts as in the first embodiment will be omitted or simplified.

  FIG. 14 is a perspective view showing the guide member 40 of the second embodiment. As shown in FIG. 14, the guide member 40 of the present embodiment is configured by a rectifying plate 41 and an engaging portion 43, without the frame body 42 of the first embodiment. The rectifying plate 41 of the present embodiment is configured to be supported by the upper wall surface and the lower wall surface of the second cold air bypass passage 15.

  According to this, by omitting the frame body 42 that supports the rectifying plate 41, the simple guide member 40 allows the temperature of the air blown to the front seat side of the vehicle and the air blown to the rear seat side of the vehicle interior. Deviation from the blowing temperature can be suppressed.

  In addition, with the omission of the frame body 42, it is possible to reduce elements that serve as ventilation resistance in the second cold air bypass passage 15 in the guide member 40.

(Third embodiment)
Next, a third embodiment will be described. The present embodiment is different from the first and second embodiments in that an element that provides ventilation resistance is added to the guide member 40. In the present embodiment, description of the same or equivalent parts as in the first and second embodiments will be omitted or simplified.

  FIG. 15 is a perspective view showing the guide member 40 of the third embodiment. As shown in FIG. 15, the guide member 40 of the present embodiment is configured such that a baffle 44 is provided at the end of the rectifying plate 41 on the upstream side of the air flow. The baffle 44 is configured by a plate-like member extending in a direction intersecting with the air flow flowing inside the rectifying plate 41. The baffle 44 of this embodiment is formed integrally with the rectifying plate 41.

  In the present embodiment, a baffle 44 that serves as ventilation resistance in the second cold air bypass passage 15 is added to the guide member 40. According to this, the flow of the cold air in the second cold air bypass passage 15 is disturbed by the baffle 44, thereby promoting the mixing with the warm air in the second air mixing unit 21 on the downstream side of the second cold air bypass passage 15. it can.

(Fourth embodiment)
Next, a fourth embodiment will be described. In this embodiment, the point which has arrange | positioned the baffle plate 41 of the guide member 40 inside the division surface of the intermediate | middle case member 113 is different from the 1st-3rd embodiment. In the present embodiment, description of the same or equivalent parts as in the first to third embodiments will be omitted or simplified.

  FIG. 16 is a perspective view showing a guide member 40 of the fourth embodiment. As shown in FIG. 16, in the guide member 40 of the present embodiment, the frame body 42 is disposed on the dividing surface side of the intermediate case member 113. In the present embodiment, the frame body 42 is provided with an engaging portion 43 that engages with a support wall that supports the heater core 13 in the intermediate case member 113.

  The rectifying plate 41 is disposed on the inner side of the frame body 42 in the second cold air bypass passage 15. That is, the rectifying plate 41 of the present embodiment is disposed on the inner side of the dividing surface in the intermediate case member 113.

  The guide member 40 of the present embodiment is configured such that the frame body 42 is disposed on the dividing surface side of the intermediate case member 113 and the engaging portion 45 is provided on the frame body 42. It can arrange | position inside a division surface. According to this, it becomes possible to arrange | position the baffle plate 41 according to the formation position of the opening part 31 for the rear seats in the intermediate | middle case member 113, and the air which flows through the cold wind bypass passage 15 more appropriately can be opened. It can guide toward the 31 side.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, this invention is not limited to the above-mentioned embodiment, In the range described in the claim, it can change suitably. For example, various modifications are possible as follows.

  In each of the above-described embodiments, an example in which the present invention is applied to a vehicle air conditioner in which the air passage inside the air conditioning case 11 is vertically divided by the front partition wall 16 and the rear partition wall 17 has been described. Application is not limited to this. The present invention may be applied to a vehicle air conditioner in which the air passage inside the air conditioning case 11 is not divided vertically.

  In each of the above-described embodiments, the example in which the present invention is applied to the vehicle air conditioner in which the air passage inside the air conditioning case 11 is divided into the left and right by the left and right partition walls 35 has been described, but the application of the present invention is not limited thereto. . The present invention may be applied to a vehicle air conditioner in which the air passage inside the air conditioning case 11 is not divided into left and right.

  In each of the above-described embodiments, the example in which the present invention is applied to the vehicle air conditioner capable of independently adjusting the door opening degree of each of the air mix doors 18 and 19 has been described, but the application of the present invention is limited to this. Not. For example, the present invention may be applied to a vehicle air conditioner including a single or three or more air mix doors. The air mix doors 18 and 19 may be constituted by not only sliding doors but also cantilever doors.

  In each of the above-described embodiments, the example in which the present invention is applied to the vehicle air conditioner in which the front seat foot opening 30 is provided in the pair of case members 111 and 112 has been described, but the present invention is not limited thereto. For example, the present invention may be applied to a vehicle air conditioner in which the front seat face opening 25 is provided in the pair of case members 111 and 112. In this case, the guide member 40 may be disposed on the intermediate case member 113 so that the difference between the blowing temperature of the front seat face opening 25 and the blowing temperature of the rear seat opening 31 is suppressed.

  Although it is desirable that the guide member 40 be detachable from the intermediate case member 113 as in the above-described embodiments, the present invention is not limited to this. For example, the guide member 40 may be formed integrally with the intermediate case member 113.

  In each above-mentioned embodiment, it is set as the structure which has the baffle plate 41 extended toward the opening part 31 side for rear seats as the guide member 40, However, It is not limited to this. For example, the guide member 40 may be configured to have a louvered wind direction plate that turns the direction of the cold air toward the rear seat opening 31 side.

  In each of the above-described embodiments, the example in which the rectifying plate 41 is configured by a plate member extending from the upper wall surface to the lower wall surface of the second cold air bypass passage 15 has been described, but the present invention is not limited thereto. For example, the rectifying plate 41 may be constituted by a plate-like member extending downward from the upper wall surface of the second cold air bypass passage 15 or a plate member extending upward from the lower wall surface. At this time, the rectifying plate 41 may be formed with a communicating portion that communicates an air passage formed on the left and right with a part of the second cold air bypass passage 15.

  In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential except when clearly indicated as essential and when considered to be clearly essential in principle. .

  In each of the above-described embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is particularly limited to a specific number when clearly indicated as essential and in principle. It is not limited to that specific number, except in the case of

  In each of the above-described embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, position, etc., unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to relationships.

11, 11A, 11B Air-conditioning case, reference case, telescopic case 111, 112 Pair of case members 113 Intermediate case member 12 Evaporator (cooling member)
13, 28 Heater core, electric heater (heating member)
15 Second cold air bypass passage (cold air bypass passage)
30 Front seat foot opening (front seat opening)
31 Rear seat opening

Claims (6)

An air conditioning case (11, 11A, 11B) that forms an air passage for air blown into the vehicle interior by interposing an intermediate case member (113) between the pair of case members (111, 112);
A cooling member (12) disposed in the air conditioning case for cooling the air flowing through the air passage;
A heating member (13, 28) that is disposed in the air conditioning case and heats the air that has passed through the cooling member;
The air conditioning case is provided with a cold air bypass passage (15) for flowing air that has passed through the cooling member, bypassing the heating member, and cold air that has passed through the cold air bypass passage and hot air that has passed through the heating member. Are formed with a plurality of openings (23, 25, 30, 31),
The plurality of openings are formed in the pair of case members to allow air to flow out to the front seat side in the vehicle interior, and are formed in the intermediate case member and formed in the vehicle interior. It includes a rear seat opening (31) that allows air to flow out to the rear seat side,
The intermediate case member is provided with a guide member (40) for guiding the air that has passed through the cooling member to the rear seat opening side in a space that constitutes the cold air bypass passage. Air conditioner.   The vehicle air conditioner according to claim 1, wherein the guide member has a current plate (41) extending toward the rear seat opening.   The vehicle air conditioner according to claim 1 or 2, wherein the guide member is configured to be removable from the intermediate case member.   The vehicular resistance according to any one of claims 1 to 3, wherein the downstream side of the rear seat opening portion has a larger ventilation resistance than the downstream side of the front seat opening portion. Air conditioner. The front seat opening is a front seat foot opening (30) through which air blown out toward the feet of a passenger on the front side of the vehicle interior flows out of the air conditioning case,
5. The rear seat opening is an opening through which air blown out toward the feet or upper body of a passenger on the rear seat side of the vehicle interior flows out of the air conditioning case. The vehicle air conditioner described in 1. The air conditioning case passes the cooling member (12) downstream of the cold air bypass passage and upstream of the front seat opening (30) and the rear seat opening (31). An air mixing part (21) for mixing the air that has passed through and the air that has passed through the heating member (13, 28) is formed,
The vehicle air conditioner according to any one of claims 1 to 5, wherein the guide member is disposed on an upstream side of the air mixing section (21).

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