JP6669142B2 - Vehicle air conditioner - Google Patents

Description

  The disclosure in this specification relates to an air conditioner used for a vehicle.

  Patent Document 1 discloses a vehicle air conditioner. A vehicle air conditioner provides a plurality of blown air at different temperatures. For this application, the air passage through one heater core is divided into a plurality of passages. The division of the air passage is realized by a plurality of partition plates.

JP 2010-162946 A

  In the configuration of the related art, the positions of the plurality of partition plates are set such that a heating amount required for the air in the plurality of passages, that is, a rise in temperature is obtained. However, the ratio of the air volume in the plurality of passages may vary depending on the configuration on the upstream side and / or the configuration on the downstream side of the plurality of passages. For example, many vehicle air conditioners have a plurality of outlet ducts on the downstream side. In addition, the number, length, communication state, and the like of the blow ducts, which are factors that affect the ventilation resistance in the blow duct, are changed according to the type of vehicle, specifications, switching of the blow mode, and the like.

  For this reason, the ratio of the air volume in a plurality of passages may change. Furthermore, the required temperature may not be obtained in one or a plurality of passages due to a change in the ratio of the air volume. Fluctuations in temperature in one or more passages can lead to reduced temperature control performance. In view of the above, or other aspects not mentioned, there is a need for further improvements in vehicle air conditioners.

  One object disclosed is to provide a vehicle air conditioner that can easily adjust a temperature characteristic difference between a plurality of heater passages.

The vehicle air conditioner disclosed herein includes a heater core (21) that heats air, and a case (44, 45) that partitions a plurality of heater passages that pass through the heater core. in or downstream, the area of the plurality of heaters passages increases while partitioned by the case, possess regulatory unit to be reduced in other partitioned by the case of (46,47,246,247,346,347) , The case has a first case (44) and a second case (45) that partition three heater passages (25c, 25e, 25d) passing through the heater core, and the adjustment unit is provided in the first case. to Yes and the first adjusting portion which was (46,246,346), a second adjusting portion provided in the second case the (47,247,347).

  According to the disclosed vehicle air conditioner, the case that partitions the plurality of heater passages includes the adjustment unit. The adjusting unit increases or decreases the area of the heater passage before and after the heater core. Thereby, the temperature characteristic difference in the plurality of heater passages is adjusted without affecting portions other than the front and rear portions of the heater core. The temperature characteristic difference is adjusted by the shape of the adjustment unit. Therefore, the temperature characteristic difference can be easily adjusted.

  The embodiments disclosed in this specification employ different technical means to achieve their respective objects. The reference numerals in parentheses described in the claims and this section exemplarily show the correspondence with the parts of the embodiment described later, and are not intended to limit the technical scope. The objects, features, and advantages disclosed in this specification will become more apparent with reference to the following detailed description and the accompanying drawings.

It is a perspective view of the air conditioner for vehicles concerning a 1st embodiment. It is a side view of the air conditioner for vehicles. It is the modeled sectional view of the air conditioner for vehicles. It is the modeled rear view of a heater unit. It is a rear view showing a bypass passage and a heater passage. It is an exploded view showing a case of a heater unit. It is a rear view showing a part of case of a heater unit. It is a side view of the air conditioner for vehicles. FIG. 9 is a modeled end view along line IX-IX in FIG. 8. It is the modeled sectional view of the case of a 1st embodiment. It is the modeled sectional view of the case of a 2nd embodiment. It is the modeled sectional view of the case of a 3rd embodiment. It is an exploded view showing a case of a 1st embodiment. It is a perspective view showing a middle case of a 1st embodiment. It is sectional drawing of the middle case of 1st Embodiment.

  A plurality of embodiments will be described with reference to the drawings. In embodiments, functionally and / or structurally corresponding parts and / or associated parts may be provided with the same reference signs or reference signs that differ by more than a hundred places. For corresponding parts and / or associated parts, the description of the other embodiments can be referred to.

1st Embodiment In FIG. 1, the vehicle air conditioner 1 is mounted in a vehicle. The vehicle air conditioner 1 is mounted, for example, in front of a front seat of a vehicle. In the drawing, an upward direction UP, a downward direction BT, a leftward direction LT, a rightward direction RT, a forward direction FR, and a rearward direction RR of the vehicle are illustrated.

  The vehicle air conditioner 1 includes an inside / outside air switching device 2, a blower 3, and a temperature controller 4. The inside / outside air switching device 2, the blower 3, and the temperature controller 4 each have a resin case. These cases form an air passage. These cases house heat exchangers and functional components such as doors.

  The inside / outside air switching device 2 has an inside air intake 11 for introducing air inside the vehicle, and an outside air intake 12 for introducing air outside the vehicle. The inside / outside air switching device 2 has a door that adjusts the introduction ratio of the inside air from the inside air intake 11 and the outside air from the outside air intake 12. The blower 3 includes an electric motor that drives a fan. In the figure, a cavity for mounting the intake filter is shown. The intake filter is not shown. The blower 3 introduces air from the inside / outside air switching device 2 and blows the air toward the temperature controller 4. The temperature controller 4 has a cooler unit 5, a heater unit 6, and a blowing unit 7.

  The cooler unit 5 includes a cooling heat exchanger for cooling air. The cooling heat exchanger is an evaporator of a refrigeration cycle. The cooler unit 5 cools the entire amount of air blown by the blower 3 when the cooling heat exchanger functions.

  The heater unit 6 includes a heater core 21. The heater unit 6 includes a plurality of air mix doors. The heater unit 6 heats the air that has passed through the cooler unit 5. The heater unit 6 provides independent temperature control to a plurality of regions obtained by virtually dividing a vehicle room into a plurality of regions. The heater unit 6 provides independent temperature control for the driver's seat area, the passenger seat area, and the rear seat area. The driver seat area is a space around the driver seat of the vehicle. The passenger seat area is a front seat of the vehicle and is a space around a seat next to the driver's seat. The driver's seat area may be located on the right seat or the left seat on the front seat. The rear seat area is a space around the rear seat of the vehicle. The plurality of areas can be set arbitrarily. The heater unit 6 is also called a three-seat independent temperature control type unit. Details of the heater unit 6 will be described later.

  The blowout unit 7 includes a plurality of blowout ports for blowing air toward a room. The blowout unit 7 switches a plurality of outlets according to a plurality of blowout modes. The illustrated outlets are connected to a plurality of ducts (not illustrated). The plurality of ducts communicate with an outlet grill provided in the vehicle.

  The blowout unit 7 has at least a differential blowout port 13. The differential air outlet 13 blows air toward a front windshield of the vehicle. The differential outlet 13 is mainly used for removing fogging of the windshield. The differential outlet 13 is opened mainly in the differential mode. The blowing unit 7 may additionally open the differential outlet 13 even in modes other than the differential mode. For example, the outlet unit 7 may additionally open the differential outlet 13 in a foot mode in which air is blown from a front seat foot outlet 15 and / or a rear seat foot outlet 18 which will be described later.

  The blowout unit 7 has a front seat face outlet 14. The front seat face outlet 14 has face outlets 14a and 14b for the right seat and face outlets 14c and 14d for the left seat. The front seat face outlet 14 is mainly used for blowing air toward the upper part of the front seat. The blowout unit 7 has a front seat foot outlet 15 for a front seat. The front seat foot outlet 15 has a foot outlet 15a for the right seat and a foot outlet 15b for the left seat. The front seat foot outlet 15 is mainly used to blow air toward a lower part of the front seat.

  The blowout unit 7 has a rear seat face outlet 17. The rear seat face outlet 17 is mainly used for blowing air toward the upper part of the rear seat. The outlet unit 7 has a rear seat foot outlet 18 for a rear seat. The rear seat foot outlet 18 has a right rear seat foot outlet 18a for a right rear seat and a left rear seat foot outlet 18b for a left rear seat. The rear seat foot outlet 18 is mainly used for blowing air toward a lower portion of the rear seat.

  In the vehicle air conditioner 1, air flows in the order of the inside / outside air switching device 2, the blower 3, and the temperature controller 4. The air temperature-controlled by the temperature controller 4 is supplied from a plurality of outlets to the room. In this embodiment, the temperatures of the air supplied to the three areas in the room are adjusted independently of each other. Specifically, air at different temperatures is supplied to the driver seat area, the passenger seat area, and the rear seat area. As a result, the vehicle air conditioner 1 controls the temperature of the three indoor areas independently of each other.

  FIG. 2 shows a side surface of the vehicle air conditioner 1. In the temperature controller 4, the cooler unit 5 and the heater unit 6 are arranged along the flow of air from the front direction FR to the rear direction RR of the vehicle. The heater unit 6 has a heater core 21 as a heating heat exchanger for heating air. The heater core 21 is a hot water heater using hot water available in the vehicle as a heat source. The heater core 21 heats the air when hot water flows.

  The heater unit 6 may include an electric heater 21e. The electric heater 21e is selectively provided. The electric heater 21 e is disposed in an air passage toward the front seat foot outlet 15 and the rear seat foot outlet 18. The electric heater 21e heats the air when activated. The blowout unit 7 is arranged in the rear direction RR of the vehicle.

  In the temperature controller 4, the temperature-controlled air flows inside the blowout unit 7 toward a blowout port selected by the plurality of doors.

  3, the cooler unit 5 has an evaporator 22. A low-temperature and low-pressure refrigerant is supplied to the evaporator 22 from a refrigeration cycle. The evaporator 22 is arranged so as to cross all the air passages of the cooler unit 5. The entire amount of air blown from the blower 3 passes through the evaporator 22.

  The heater unit 6 includes a plurality of air mix doors 23. The case of the heater unit 6 defines a bypass passage 24 that bypasses the heater core 21. The case of the heater unit 6 defines a heater core passage 25 that passes through the heater core 21. The heater core passage 25 is formed from the upstream side to the downstream side of the heater core 21. The heater core passage 25 starts from between the air mix door 23 and the heater core 21, passes through the heater core 21, and extends to end on the downstream side of the heater core 21.

  The air mix door 23 is provided on the inlet side of the bypass passage 24 and the heater core passage 25. The air mix door 23 is provided between the evaporator 22 and the heater core 21. The air mix door 23 is a so-called slide door type. The air mix door 23 can be provided in various configurations such as a swing shaft type and a film type.

  The air mix door 23 adjusts the ratio of the entrance area of the bypass passage 24 to the entrance area of the heater core passage 25. The air mix door 23 adjusts the ratio between the air volume of the bypass passage 24 and the air volume of the heater core passage 25. The air passing through the bypass passage 24 and the air passing through the heater core passage 25 are mixed downstream of these passages. Therefore, the air mix door 23 is a member that adjusts the temperature of the air.

  The case of the heater unit 6 and the blowout unit 7 defines an air passage toward a plurality of blowout ports 13, 14, 15, 17, 18. These air passages include an air passage toward the differential outlet 13. The air passage toward the differential air outlet 13 extends from the downstream side (rearward direction RR) of the heater core 21 while bending toward the upward direction UP. The blowout unit 7 includes a differential door 31 for opening and closing the differential outlet 13.

  The plurality of air passages include air passages toward outlets 14 and 15 for the front seat. The air passage toward the front seat face outlet 14 extends from the downstream side of the heater core 21 so as to wind around the outside of the air passage toward the differential outlet 13 in the upward direction UP. The air passage toward the front seat foot outlet 15 extends from the downstream side of the heater core 21 toward the right direction RT and the left direction LT of the blowout unit 7. The air passages leading to the outlets 14 and 15 for the front seats are the air passages leading to the outlets 14a, 14b and 15a for the right seat and the air passages leading to the outlets 14c, 14d and 15b for the left seat. And The blowout unit 7 includes a plurality of face doors 32 for opening and closing the right seat face outlets 14a and 14b and the left seat face outlets 14c and 14d, respectively.

  The plurality of air passages include air passages toward outlets 17 and 18 for the rear seats. The air passages toward the outlets 17 and 18 for the rear seats extend from the downstream side of the heater core 21 in the downward direction BT and the rearward direction RR. The air passages toward the outlets 17 and 18 for the rear seats extend toward the rear direction RR at the center of the vehicle. The air passages leading to the outlets 17 and 18 for the rear seats are connected to ducts toward the rear seats arranged along the floor of the vehicle or the like. The blowout unit 7 includes a rear seat door 34 that opens and closes the rear face face air outlet 17 and the rear seat foot air outlet 18, respectively.

  In FIG. 4, almost the entire surface of the illustrated heater unit 6 faces the evaporator 22. The heater unit 6 includes a plurality of air mix doors 23a, 23b, 23c, 23d, and 23e to provide a plurality of temperature control mechanisms. In the drawing, a rotating shaft as a drive mechanism and a gear mechanism are illustrated. The case of the heater unit 6 defines a plurality of bypass passages 24a, 24b, 24c, 24d, 24e.

  FIG. 5 shows the arrangement of the bypass passages 24a to 24e and the heater passages 25a to 25e on the heater core 21. The bypass passage 24a, the heater passage 25a, the bypass passage 24c, and the heater passage 25c mainly communicate with the outlets 14a, 14b, 15a for the front right seat. The bypass passage 24b, the heater passage 25b, the bypass passage 24d, and the heater passage 25d mainly communicate with the outlets 14c, 14d, and 15b for the front left seat. The bypass passage 24a, the heater passage 25a, the bypass passage 24c, the heater passage 25c, the bypass passage 24b, the heater passage 25b, the bypass passage 24d, and the heater passage 25d may also communicate with the differential outlet 13. The bypass passage 24e and the heater passage 25e mainly communicate with the outlets 17 and 18 for the rear seat. The bypass passage 24e and the heater passage 25e may communicate with the differential outlet 13 in some cases.

  4 and 5, the plurality of air mix doors 23a and 23b are provided upstream of the plurality of heater passages 25a and 25b, and adjust the respective opening areas of the plurality of heater passages 25a and 25b. The plurality of air mix doors 23c, 23d, 23e are provided upstream of the plurality of heater passages 25c, 25d, 25e, and adjust the respective opening areas of the plurality of heater passages 25c, 25d, 25e.

  The air mix door 23a and the air mix door 23c are linked. The air mix door 23a and the air mix door 23c adjust the ratio of the opening area in the bypass passage 24a, the heater passage 25a, the bypass passage 24c, and the heater passage 25c. The air mix door 23a and the air mix door 23c are temperature control members for the front right seat. The air mix door 23b and the air mix door 23d are linked. The air mix door 23b and the air mix door 23d adjust the ratio of the opening area in the bypass passage 24b, the heater passage 25b, the bypass passage 24d, and the heater passage 25d. The air mix door 23b and the air mix door 23d are temperature control members for the front left seat. The air mix door 23e adjusts the ratio of the opening area in the bypass passage 24e and the heater passage 25e. The air mix door 23e is a temperature adjusting member for a rear seat.

  The bypass passage 24 a bypasses over the heater core 21. The bypass passage 24a and the heater passage 25a merge downstream of the heater core 21 (rearward direction RR). The bypass passage 24 b bypasses over the heater core 21. The bypass passage 24b and the heater passage 25b join at the downstream (rearward direction RR) of the heater core 21. The bypass passage 24c bypasses below the heater core 21. The bypass passage 24c and the heater passage 25c merge downstream of the heater core 21 (rearward direction RR). The bypass passage 24 d bypasses below the heater core 21. The bypass passage 24d and the heater passage 25d merge downstream of the heater core 21 (rearward direction RR). The bypass passage 24 e bypasses below the heater core 21. The bypass passage 24e and the heater passage 25e merge downstream of the heater core 21 (rearward direction RR). The bypass passage 24e and the heater passage 25e extend in the rearward direction RR through between the bypass passage 24c and the heater passage 25c and the bypass passage 24d and the heater passage 25d.

  FIG. 6 shows a case of the heater unit 6. In the drawing, the disassembled state is illustrated. FIG. 7 shows a combination state of the center case 41 and the two middle cases 44 and 45. Middle case 44 is also called a first case. Middle case 45 is also called a second case. 6 and 7 show the appearance when the rear direction RR is viewed from the back of the heater unit 6, that is, from the front end of the vehicle.

  The heater unit 6 has a plurality of cases 41-45. The heater unit 6 includes a center case 41 and side cases 42 and 43 on both sides. Side cases 42 and 43 are combined with the center case 41 from both sides of the center case 41. Further, the heater unit 6 includes two middle cases 44 and 45.

  The center case 41 provides a partition member that partitions between the heater passage 25a and the heater passage 25b. Middle case 44 is arranged between center case 41 and side case 42. Middle case 45 is arranged between center case 41 and side case 43. Middle case 44 provides a partition member for partitioning between heater passage 25c and heater passage 25e. Middle case 45 provides a partition member for partitioning between heater passage 25d and heater passage 25e. The center case 41 may partition the heater passage 25e. Therefore, the two middle cases 44 and 45 define a plurality of heater passages 25c, 25d and 25e on the upstream and downstream sides of the heater core 21.

  The middle cases 44 and 45 are members smaller than other members, for example, the center case 41 and the side cases 42 and 43. The functions of the middle cases 44 and 45 are smaller than those of other members such as the center case 41 and the side cases 42 and 43. For this reason, the shapes of the middle cases 44 and 45 can be changed while suppressing the influence on other members. For example, several types of middle cases 44 and 45 having different shapes are prepared, and middle cases 44 and 45 suitable for differences in vehicle types and specifications are selected. The middle cases 44 and 45 can have shapes suitable for differences in vehicle types and specifications.

  FIG. 8 shows a side surface of the vehicle air conditioner 1. In the figure, a pipe extending from the heater core 21, a door driving mechanism, and the like are omitted.

  FIG. 9 shows a modeled end face along the line IX-IX of FIG. The end face shows the cut edge of the member. The IX-IX line passes through the heater passage 25c, the heater passage 25d, and the heater passage 25e. The air blown from the blower 3 passes through the evaporator 22 and reaches the air mixing doors 23c, 23d, and 23e.

  The heater passage 25c is mainly partitioned by the side case 42 and the middle case 44. The middle case 44 has an adjustment unit 46 that changes the cross-sectional area of the heater passage 25c. The adjustment unit 46 is also called a first adjustment unit. The adjusting portion 46 is formed by providing a curved shape to the partition portion of the middle case 44. The adjustment unit 46 gradually increases the cross-sectional area of the heater passage 25c from the air mix door 23c toward the heater core 21. The adjusting section 46 gradually decreases the cross-sectional area of the heater passage 25c from the heater core 21 toward the downstream. The adjusting section 46 increases the area passing through the heater core 21 without affecting the area of the heater passage 25c adjusted by the air mix door 23c.

  The change in the cross-sectional area of the heater passage 25c before and after the heater core 21 adjusts the amount of heating of the heater core 21 to air. Therefore, the adjusting unit 46 adjusts the heating amount. In this embodiment, the heating amount can be adjusted by the middle case 44.

  The heater passage 25d is mainly partitioned by the side case 43 and the middle case 45. The middle case 45 has an adjustment unit 47 that changes the cross-sectional area of the heater passage 25d. The adjustment unit 47 is also called a second adjustment unit. The adjusting portion 47 is formed by providing a curved shape in a partition portion of the middle case 45. The adjustment unit 47 gradually increases the cross-sectional area of the heater passage 25d from the air mix door 23d toward the heater core 21. The adjusting section 47 gradually decreases the cross-sectional area of the heater passage 25d from the heater core 21 toward the downstream. The adjusting section 47 increases the area passing through the heater core 21 without affecting the area of the heater passage 25d adjusted by the air mix door 23d.

  The change in the cross-sectional area of the heater passage 25d before and after the heater core 21 adjusts the amount of heating of the heater core 21 to air. Therefore, the adjustment unit 47 adjusts the heating amount. In this embodiment, the heating amount can be adjusted by the middle case 45.

  The heater passage 25 e is partitioned between the middle case 44 and the middle case 45. The adjustment sections 46 and 47 change the cross-sectional area of the heater passage 25e. The adjusters 46 and 47 gradually decrease the cross-sectional area of the heater passage 25e from the air mix door 23e toward the heater core 21. The adjusters 46 and 47 gradually increase the cross-sectional area of the heater passage 25e from the heater core 21 toward the downstream. The adjusters 46 and 47 reduce the area passing through the heater core 21 without affecting the area of the heater passage 25e adjusted by the air mix door 23e.

  The middle cases 44 and 45 are members that partition the plurality of heater passages 25c, 25d, and 25e that pass through the heater core 21. The middle cases 44, 45 increase the area of the plurality of heater passages 25c, 25d, 25e in one of the heater passages 25c, 25d partitioned by the middle cases 44, 45 on the upstream side and / or downstream side of the heater core 21. In addition, the other heater passage 25e partitioned by the middle cases 44 and 45 has adjusting portions 46 and 47 for reducing the amount. The adjusting units 46 and 47 have the following shapes. The adjustment sections 46 and 47 increase the area of the plurality of heater passages 25c, 25d, and 25e from the upstream of the heater core 21 to the heater core 21 in one of the heater passages 25c and 25d partitioned by the middle cases 44 and 45. , In the other heater passage 25e partitioned by the middle cases 44, 45. The adjusters 46 and 47 reduce the area of the plurality of heater passages 25c, 25d and 25e from the heater core 21 to the downstream of the heater core 21 in one of the heater passages 25c and 25d partitioned by the middle cases 44 and 45. , In the other heater passage 25e partitioned by the middle cases 44, 45.

  The middle cases 44, 45 are also a first middle case 44 and a second middle case 45 that partition the three heater passages 25c, 25e, 25d passing through the heater core 21. In this case, the adjustment units 46 and 47 are also a first adjustment unit 46 provided in the first middle case 44 and a second adjustment unit 47 provided in the second middle case 45. The first adjustment section 46 and the second adjustment section 47 are symmetric with respect to the heater passage 25e therebetween.

  The change in the sectional area of the heater passage 25e before and after the heater core 21 adjusts the amount of heating of the heater core 21 to air. Therefore, the adjustment unit 47 adjusts the heating amount. In this embodiment, the heating amount can be adjusted by the middle cases 44 and 45.

  The adjusting units 46 and 47 positioned before and after the heater core 21 adjust and set the ratio between the heat exchange area of the heater core 21 for the heater passage 25c and the heat exchange area of the heater core 21 for the heater passage 25e. . The ratios are complementary, with one increasing and the other decreasing. This ratio can be adjusted only by changing the shape of the adjusting portions 46, 47 in the middle cases 44, 45. This ratio can be changed by mounting the middle cases 44 and 45 having different adjusting portions while sharing the center case 41 and / or the side cases 42 and 43.

  FIG. 10 shows a modeled cross section of the cases 42, 43, 44, 45 of this embodiment. As described above, the cross-sectional area of the heater passage 25c changes from the area A1 to the area A5 via the area A3, depending on the shape of the adjusting section 46. The area A1 is smaller than the area A3 (A1 <A3). The area A5 is smaller than the area A3 (A3> A5). The area A1 is equal to the area A5 (A1 = A5). The area A1 and the area A5 may be substantially the same. Such a change in the area changes the amount of heating by the heater core 21 without affecting the area A1 of the heater passage 25c adjusted by the air mix door 23c. When the area A3 passing through the heater core 21 exceeds the area A1, the heating amount is increased.

  The cross-sectional area of the heater passage 25d changes depending on the shape of the adjusting section 47. Such a change in the area changes the amount of heating by the heater core 21 without affecting the area of the heater passage 25d adjusted by the air mix door 23d.

  In the heater passage 25e positioned between the heater passages 25c and 25d, the area changes from the area A2 to the area A6 via the area A4, depending on the shapes of the adjusting portions 46 and 47. The area A2 is larger than the area A4 (A2> A4). The area A6 is larger than the area A4 (A4 <A6). The area A2 is equal to the area A6 (A2 = A6). The area A2 and the area A6 may be substantially the same. Such a change in the area changes the amount of heating by the heater core 21 without affecting the area A2 of the heater passage 25e adjusted by the air mix door 23e. When the area A4 passing through the heater core 21 is smaller than the area A2, the heating amount is reduced.

  The adjusting portions 46 and 47 have a shape that can be called a dish shape or a tapered shape. The shapes of the adjusting portions 46 and 47 are adjusted so that a desired temperature difference is obtained between the heater passages 25c and 25d and the heater passage 25e. Specifically, the depths of the dish-shaped adjusting portions 46 and 47 are adjusted so as to obtain desired temperature characteristics.

  The plurality of heater passages 25c, 25d, and 25e are associated with a plurality of regions in the vehicle cabin. The plurality of areas are areas corresponding to the seats of the vehicle, and include a front right seat area, a front left seat area, and a rear seat area.

  The amount of heating by the temperature adjusting mechanism provided by the air mix door 23c is increased, and conversely, the amount of heating by the temperature adjusting mechanism provided by the air mix door 23e is reduced. A desired difference in the amount of heating between the plurality of temperature control mechanisms can be provided. Further, from another viewpoint, the ratio of the heating amount for the front seat to the heating amount for the rear seat can be adjusted.

  The shapes of the adjusting portions 46 and 47 are set according to the use such as the vehicle type and the specification so that desired temperature characteristics can be obtained even in various uses such as the vehicle type and the specification. The adjusting units 46 and 47 have different shapes for each model of the plurality of vehicle air conditioners 1. Upstream of the heater core 21, a plurality of models can be provided with air mix doors 23c, 23d, and 23e having a common shape. The same structure is adopted downstream of the heater core 21 in a plurality of models. For example, the bypass passage 24e and the heater passage 25e are connected to outlets 17 and 18 for a rear seat. In this connection part, the same shape can be adopted in a plurality of models.

  It is possible to cope with various uses only by changing the shape of the middle cases 44 and 45 which are relatively small members. In addition, even if adjustment is required due to a change in the vehicle type or the like, it is only necessary to change the adjusting portions 46 and 47 as partitions without changing the outer shapes of the middle cases 44 and 45. The difference in the amount of heating can be adjusted without changing other components such as the air mix door 23. Further, the middle cases 44 and 45, which are small parts, contribute to reducing the amount of work and cost required for adjustment such as changing a molding die. Further, the adjusting portions 46 and 47 may increase the rigidity of the middle cases 44 and 45 in some cases. In this case, a manufacturing method for combining a plurality of cases may be facilitated.

  According to this embodiment, there is provided the vehicle air conditioner 1 in which the temperature characteristics among the plurality of temperature adjustment mechanisms can be easily adjusted. In other words, the vehicle air conditioner 1 that can be easily adjusted to a desired temperature characteristic is provided. Furthermore, the temperature characteristics can be adjusted without changing the area upstream of the heater core 21, for example, the area associated with the air mix door 23. Further, the temperature characteristics can be adjusted without changing the area downstream of the heater core 21, for example, the area of the connection to the blowout unit 7.

Second Embodiment This embodiment is a modified example based on the preceding embodiment. In the above embodiment, the adjusting units 46 and 47 are provided. The adjustment parts 46 and 47 reduce the heat exchange area of the heater core 21 for the heater passage 25e. Alternatively, the middle cases 44 and 45 may include various shapes of adjustment units. In this embodiment, adjustment units 246 and 247 are employed. This embodiment provides an example of an adjustment unit having various shapes that can be used for the middle cases 44 and 45. The adjustment units 246 and 247 increase the heat exchange area of the heater core 21 for the heater passage 25e, contrary to the above embodiment.

  As illustrated in FIG. 11, the adjustment unit 246 reduces the cross-sectional area of the heater passage 25c from the area A1 to the area A23, and further increases the area from the area A23 to the area A5. The adjusting unit 246 and the adjusting unit 247 increase the cross-sectional area of the heater passage 25e from the area A2 to the area A24, and further decrease the area from the area A24 to the area A6.

  Also in this embodiment, it is possible to provide a desired difference in the amount of heating among the plurality of temperature control mechanisms. Further, it is possible to cope with various uses only by changing the design of the adjusting portions of the relatively small middle cases 44 and 45. For example, tuning can be performed for each vehicle type by using the middle cases 44 and 45 each having an adjusting unit having a different shape for each vehicle type.

Third Embodiment This embodiment is a modified example based on the preceding embodiment. In this embodiment, adjustment units 346 and 347 are employed. This embodiment also provides an example of an adjustment unit having various shapes that can be used for the middle cases 44 and 45. The adjusting portions 346 and 347 are straight before and after the heater core 21.

  As illustrated in FIG. 12, the adjustment unit 346 changes the cross-sectional area of the heater passage 25c from the area A1 to the area A5. The transition from the area A1 to the area A5 is selected between equal (A1 = A5), uniformly increasing gradually (A1 <A5), and uniformly decreasing gradually (A1> A5). It is possible. Adjustment 346 can be provided by a straight surface or a curved surface. The adjusting unit 346 and the adjusting unit 347 change the cross-sectional area of the heater passage 25e from the area A2 to the area A6.

  In the first embodiment or the second embodiment, the sectional area of the passage is changed only before and after the heater core 21. Instead, according to this embodiment, the passage changes substantially uniformly including the front and rear of the heater core 21. As a result, the number of choices of the shape of the adjustment unit increases, and it is possible to cope with various uses.

  Returning to the first embodiment, the middle cases 44 and 45 will be described. FIG. 13 is an exploded view showing the center case 41 and the middle cases 44 and 45 of the first embodiment. FIG. 13 shows the appearance when the rear direction RR is viewed from the back of the heater unit 6, that is, from the front end of the vehicle. The middle cases 44 and 45 are parts that are both smaller in height and width than the center case 41. The middle case 44 forms a heater passage 25e and a bypass passage 24e between the middle case 44 and the center case 41. The middle case 44 forms a heater passage 25c and a bypass passage 24c between the middle case 44 and the side case 42 illustrated in FIG. The middle case 45 forms a heater passage 25e and a bypass passage 24e between the middle case 45 and the center case 41. The middle case 45 forms a heater passage 25d and a bypass passage 24d between the middle case 45 and the side case 43 shown in FIG.

  The adjustment portions 46 and 47 can adjust the ratio of the surface area for heat exchange occupied by the heater passages 25c, 25d, and 25e in the heater core 21 without being restricted by the upstream and / or downstream passage configurations. And The fact of adjustment may be confirmed by the intentionally planned shape of the adjustment part provided in the middle cases 44 and 45. The fact of adjustment may be confirmed by comparing the adjustment units of a plurality of models that share components other than the middle cases 44 and 45.

  FIG. 14 is a perspective view showing the middle case 44 of the first embodiment. FIG. 14 illustrates the middle case 44 as viewed along the arrow XIV in FIG. FIG. 15 is a cross section taken along line XV-XV in FIG. The curved arrows in FIGS. 14 and 15 indicate the flow of air. 14 and 15, the positions of the adjustment portions 46 and 47 in the middle cases 44 and 45 are clearly understood.

  The middle case 44 is a member that partitions the heater passages 25c and 25e. The middle case 44 is also one of the members that partition the heater passages 25c and 25e. The middle case 44 is also one of the members that partition the bypass passage 24c and a bypass passage 24e (not shown).

  Middle case 44 has a main slit 44a in which heater core 21 is arranged, and a sub-slit 44b in which electric heater 21e is arranged. The heater core 21 is disposed so as to cross the heater passages 25c and 25e. The electric heater 21e is disposed so as to cross the heater passages 25c and 25e.

  The middle case 44 has adjusting portions 46 on both the upstream side and the downstream side of the main slit 44a. The adjustment part 46 is also a wall that partitions the heater passage 25e and the heater passage 25c. The adjusting portion 46 has an upstream wall 46a located upstream of the main slit 44a. The adjusting section 46 has a downstream wall 46b located downstream of the main slit 44a. The flow of air in the heater passages 25c and 25e flows along the upstream wall 46a and the downstream wall 46b.

  The upstream wall 46a is arranged downstream from the air mix door 23. The downstream wall 46b is disposed upstream of the sub slit 44b. In other words, the downstream wall 46b is disposed upstream of the electric heater 21e. Thus, the adjustment units 46 and 47 adjust only the ratio of the amount of heating by the heater core 21 to the heater passage 25c and the heater passage 25e. The ratio of the heating amount by the electric heater 21e to the heater passage 25c and the heater passage 25e depends on their original passage ratio.

Other Embodiments The disclosure herein is not limited to the illustrated embodiments. The disclosure includes the illustrated embodiments and variations based thereon based on those skilled in the art. For example, the disclosure is not limited to the combination of parts and / or elements shown in the embodiments. The disclosure can be implemented in various combinations. The disclosure may have additional parts that can be added to the embodiments. The disclosure includes embodiments in which parts and / or elements are omitted. The disclosure encompasses the replacement or combination of parts and / or elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. Some of the disclosed technical ranges are indicated by the description of the claims, and should be construed to include all modifications within the meaning and range equivalent to the description of the claims.

  In the above embodiment, the adjustment units 46, 47, 246, 247, 346, 347 were adjusted to obtain a desired temperature characteristic. Alternatively, the adjuster may be adjusted to achieve a desired pressure loss. The adjusting sections 46, 47, 246, 247, 346, 347 change the cross-sectional area from upstream to downstream of the heater core 21. Alternatively, when the air mix door 23 as the temperature adjustment mechanism is located on the upstream side of the heater core 21, a change in the cross-sectional area may be given in a section from the upstream of the heater core 21 to the heater core 21.

  In the above embodiment, the adjusting portions 46, 47, 246, 247, 346, 347 having a shape that can be called a dish shape or a tapered shape are provided. Instead, various shapes such as a step shape, a convex curved surface, and a concave curved surface can be adopted. Further, the adjusting portions 46, 47, 246, 247, 346, 347 may be provided only on one of the two middle cases 44, 45.

1 vehicle air conditioner, 2 inside / outside air switching device,
3 blower, 4 temperature controller, 5 cooler unit,
6 heater unit, 7 blowout unit,
21 heater core, 22 evaporator,
23, 23a, 23b air mix door,
23c, 23d, 23e Air mix door,
24, 24a, 24b bypass passage,
24c, 24d, 24e bypass passage,
25, 25a, 25b heater passage,
25c, 25d, 25e heater passage,
41 center case, 42, 43 side case,
44 middle case, 45 middle case,
46 adjusting unit, 47 adjusting unit,
46a upstream wall, 46b downstream wall,
246 adjuster, 247 adjuster,
346 control part, 347 control part.

Claims (9)

A heater core (21) for heating air;
A case (44, 45) for partitioning a plurality of heater passages passing through the heater core;
The case is provided with an adjusting section (46) that increases the area of the plurality of heater passages on one side of the heater core and decreases the other side on the upstream side and / or the downstream side of the heater core, while decreasing the area of the plurality of heater passages on the other side. , have a 47,246,247,346,347),
The case has a first case (44) and a second case (45) that partition the three heater passages (25c, 25e, 25d) passing through the heater core,
The adjustment unit includes a first adjustment unit (46, 246, 346) provided in the first case, and a second adjustment unit (47, 247, 347) provided in the second case. vehicle air-conditioning system to have a. The adjustment units (46, 47)
From the upstream of the heater core toward the heater core, the area of the plurality of heater passages is increased on one side partitioned by the case, and decreased on the other side partitioned by the case,
The shape according to claim 1, wherein, from the heater core toward the downstream of the heater core, the area of the plurality of heater passages is decreased while being divided by the case, and is increased while being divided by the case. Vehicle air conditioners. The adjustment units (246, 247)
From the upstream of the heater core toward the heater core, the area of the plurality of heater passages is reduced on one side partitioned by the case, and increased on the other side partitioned by the case,
The shape according to claim 1, wherein, from the heater core toward the downstream of the heater core, the area of the plurality of heater passages is increased while being divided by the case, and is decreased when being divided by the case. Vehicle air conditioners.   4. The apparatus according to claim 1, further comprising: a plurality of air mix doors (23 c, 23 d, 23 e) provided upstream of the plurality of heater passages and adjusting respective opening areas of the plurality of heater passages. 5. A vehicle air conditioner according to claim 1. The adjusting unit has a different shape for each of a plurality of models,
The vehicle air conditioner according to claim 4, further comprising the air mix door having a common shape in a plurality of the models. The vehicle air conditioner according to any one of claims 1 to 5, wherein the first adjustment unit and the second adjustment unit are symmetric with respect to the heater passage therebetween. A center case (41) for partitioning a plurality of air passages including the plurality of heater passages; and two side cases (42, 43) arranged on both sides of the center case.
2. The case according to claim 1, wherein the cases are arranged on both sides of the center case, and are provided by two middle cases arranged between the center case and the two side cases, respectively. The vehicle air conditioner according to claim 6 . The vehicle air conditioner according to any one of claims 1 to 7 , wherein the plurality of heater passages are associated with a plurality of regions in a room of the vehicle. The vehicle air conditioner according to claim 8 , wherein the plurality of areas are areas corresponding to a vehicle seat, and include a front right seat area, a front left seat area, and a rear seat area.

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