JP6871821B2 - Vehicle air conditioner - Google Patents

Description

The present invention relates to a vehicle air conditioner.

Vehicles such as automobiles are provided with a vehicle air conditioner for controlling the temperature inside the vehicle interior. In this vehicle air conditioner, a cooling heat exchanger and a heating heat exchanger are arranged in order from the air inlet for the air conditioner to the air outlet for the front seat inside the air conditioner case, and cooling is performed. It is assumed that a mix door is installed between the heat exchanger for heating and the heat exchanger for heating. The mix door distributes (and adjusts the distribution amount) the air conditioning air cooled by the cooling heat exchanger to the heating heat exchanger and the bypass portion that bypasses the heating heat exchanger.

Some such vehicle air conditioners send air conditioning air to the rear seats and allow the temperature of the rear seats to be controlled independently of the front seats (for example,). See Patent Documents 1 and 2).

Japanese Patent No. 6042254 Japanese Unexamined Patent Publication No. 11-99820

In the vehicle air conditioner described in Patent Document 1, the first space for the front seat and the second space for the rear seat are provided inside the air conditioner case, and the entire inside of the air conditioner case is widened. The area was completely divided into the first space part and the second space part with respect to the direction. Therefore, the vehicle air conditioner has become larger in the width direction.

Further, in the vehicle air conditioner described in Patent Document 2, a second space portion (cold air passage) for the rear seats is provided below the heating heat exchanger at the lower part of the air conditioner case. It was. Therefore, the vehicle air conditioner has become larger in the height direction.

Therefore, an object of the present invention is mainly to solve the above-mentioned problems.

In order to solve the above problems, the present invention
Inside the air-conditioning case, the cooling heat exchanger and the heating heat exchanger are arranged in order from the air-conditioning air inlet to the front seat air outlet.
A bypass that bypasses the heating heat exchanger and the heating heat exchanger for air conditioning air cooled by the cooling heat exchanger between the cooling heat exchanger and the heating heat exchanger. In a vehicle air conditioner equipped with a mixed door to be distributed to the department
The entrance side opening of the mix door is used as a first air intake portion for the first space portion for sending air conditioning air to the air outlet portion for the front seats, and also.
An air outlet for the rear seats provided in the air conditioning case at a position outside the first air intake portion in the middle of the guide portion for guiding the air conditioning air from the cooling heat exchanger to the mix door. the second air take-in portion for a second space portion for sending the conditioned air provided to,
The second space portion includes a cold air aisle that sends cold air to the air outlet portion for the rear seats and a hot air passage that sends warm air to the air outlet portion for the rear seats inside the first space portion. With
The second air intake portion is a cold air intake portion that takes in air conditioning air from a position above the entrance side opening of the mix door to the cold air passage, and a cold air intake portion that takes in air conditioning air from the entrance side opening of the mix door. It is characterized by having a hot air intake portion that takes in air conditioning air from a lower position to the hot air passage.

According to the present invention, according to the above configuration, it is possible to independently control the temperature of the front seat and the rear seat while preventing the vehicle air conditioner from becoming large in size.
Further, according to the above configuration, the second space portion can be divided into a cold air passage and a hot air passage, and can be installed comfortably inside the first space portion, and the upper and lower cold air intake portions and the hot air intake portion can be installed without difficulty. The air-conditioning air can be effectively taken into the cold air passage and the hot air passage from the inclusion portion, respectively, and a specific structure for establishing the second space portion can be obtained.

This embodiment is an external view (overall perspective view) of the vehicle air conditioner. It is a side view of the vehicle air conditioner of FIG. It is a top view of the vehicle air conditioner of FIG. It is a rear view of the vehicle air conditioner of FIG. It is a figure which shows the air outlet part for a rear seat, and is the partial enlarged perspective view which looked at the air conditioner for a vehicle from the rear diagonally lower side. It is an exploded perspective view of the air conditioning case (rear case). It is a vertical cross-sectional view which shows the internal structure of (the first space part) of an air conditioning case. It is a perspective view of the left side case of an air conditioning case (rear case) seen from the back side. It is a vertical cross-sectional view of the air-conditioning case explaining the 2nd space part provided in the 1st space part. It is a perspective view cut to the side of the upper part of the air conditioning case (rear case). It is a vertically cut perspective view of the rear part of an air conditioning case (rear case). It is a perspective view of the partition wall which disassembled the cold air passage. It is a perspective view of the partition wall provided with the cold air passage and the hot air passage. 13A and 13B are views showing a partition wall, where FIG. 13A is a side view, FIG. 13B is a front view, FIG. 13C is a rear view, and FIG. 13D is a plan view.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 14 are for explaining this embodiment.

<Structure> The configuration of this embodiment will be described below.

For vehicles such as automobiles, an air conditioner for vehicles is provided to control the temperature inside the vehicle interior. This vehicle air conditioner is an air conditioner installed inside an instrument panel provided at the front of the vehicle interior.

FIG. 1 (to FIG. 4) is a diagram showing the appearance of the vehicle air conditioner 1. Hereinafter, the vehicle air conditioner 1 will be described with reference to the state of being mounted on the vehicle (front-rear direction x (or vehicle front-rear direction), width direction y (or vehicle width direction), vertical direction z).

The vehicle air conditioner 1 includes a refrigerant 3a (cooling medium) supply / discharge section 3 and a heat medium 4a (heating medium) supply / discharge section 4 on the front surface of the hollow air conditioner case 2. An engine coolant or the like is used as the heat medium 4a. Further, the vehicle air conditioner 1 is an air conditioner for taking air conditioner air 5 from a blower unit provided with a blower into the air conditioner case 2 on the front side surface (see FIGS. 3 and 4) of the air conditioner case 2. The inlet portion 6 of the air conditioner 5 is provided.

The air-conditioning case 2 is provided with various air outlets 7 for front seats on its upper surface, rear side surface, and the like. The air outlet portion 7 for the front seat on the upper surface of the air conditioner case 2 is above the front defroster port 7a for blowing out the air conditioner air 5 for preventing window fogging toward the front window glass and the front seat occupant in order from the front side. It is a side vent port 7b for blowing out air conditioning air 5 toward the body and a center vent port 7c.

A strength member disposing portion 8 is provided between the side vent port 7b and the center vent port 7c. The strength member disposing portion 8 is a space for disposing a pipe-shaped vehicle body strength member (steering support member) extending in the width direction y (vehicle width direction) and connecting the left and right side panels of the vehicle body. .. Then, by arranging the side vent port 7b and the center vent port 7c separately in the front and rear of the strength member disposing portion 8, the side vent duct extending from the side vent port 7b and the center vent port 7c extend from the side vent port 7b. It is possible to efficiently handle the center vent duct in the instrument panel (or reduce the intersection with the vehicle body strength member).

Further, on the rear side surface of the air conditioning case 2, as an air outlet portion 7 for the front seats, a foot opening 7d for the front seats for blowing out the air conditioning air 5 toward the feet of the front seat occupants is provided.

Further, as shown in FIG. 5, the air conditioning case 2 is provided with an air outlet portion 11 for the rear seat at the lower part of the rear surface. The rear seat air outlet portion 11 blows out the air conditioning air 5 toward the upper body of the rear seat occupant and the rear seat vent port 11a for blowing out the air conditioning air 5 toward the feet of the rear seat occupant. It is a foot opening 11b for the rear seats. In this embodiment, the foot opening 11b for the rear seats is shared with the front and rear seats by communicating with the air outlet portion 7 for the front seats, and thus is used as a part of the air outlet portion 7 for the front seats. I try to handle it. An outlet member 12 (FIG. 1) separate from the air conditioning case 2 is attached to the air outlet portion 11 for the rear seats. The inside of the outlet member 12 is partitioned into a vent opening 12a connected to the vent opening 11a and a foot opening 12b connected to the foot opening 11b.

The air outlets 7 for the front seats are separately provided on the left and right sides for the driver's seat and the passenger seat. Further, the air outlet portions 11 for the rear seats are collectively arranged at the central portion in the width direction y of the air conditioning case 2. Among them, the foot openings 11b for the rear seats are provided separately on the left and right, and the vent openings 11a for the rear seats are common to the left and right, and are located between the left and right foot openings 11b. The air outlet portion 7 for the front seats and the air outlet portion 11 for the rear seats are guided to the respective air outlets provided in the vehicle interior via duct members, respectively.

The air conditioning case 2 is divided into a front case 13 and a rear case 14. By dividing the air-conditioning case 2 into a front case 13 and a rear case 14 in this way, two types of front cases 13 in which the positions of the inlets 6 of the air-conditioning air 5 are opposite to each other are prepared. The rear case 14 can be used for both the vehicle air conditioner 1 for a right-hand steering wheel vehicle and the vehicle air conditioner 1 for a left-hand steering wheel vehicle simply by leaving the rear case 14.

Further, as shown in FIG. 6, the rear case 14 is divided into a right side case 14a and a left side case 14b. A partition wall 15 (center plate) for partitioning the internal space of the air conditioning case 2 to the left and right is provided between the right side case 14a and the left side case 14b. The partition wall 15 is supposed to have a side surface shape substantially the same as the side surface shape of the air conditioning case 2. By partitioning the inside of the rear case 14 to the left and right in this way, the temperature of the front seats can be adjusted independently on the left and right.

FIG. 7 shows the internal structure of the air conditioner case 2 in the vehicle air conditioner 1. Inside the air-conditioning case 2, a cooling heat exchanger 16 and a heating heat exchanger 17 are arranged in order from the inlet 6 of the air-conditioning air 5 to the air outlet 7 for the front seats. .. A mix door 18 is installed between the cooling heat exchanger 16 and the heating heat exchanger 17. The mix door 18 distributes (and adjusts the distribution amount) the air conditioning air 5 cooled by the cooling heat exchanger 16 to the heating heat exchanger 17 and the bypass portion 19 that bypasses the heating heat exchanger 17. Is what you do.

Here, the cooling heat exchanger 16 exchanges heat between the refrigerant 3a (cooling medium) from the supply / discharge unit 3 and the air conditioning air 5, cools and dehumidifies the air conditioning air 5, and turns it into cold air 5C. It is for doing (evaporator). The cooling heat exchanger 16 is provided inside the front case 13 in a state of being slightly tilted forward when viewed from the side.

Further, the heating heat exchanger 17 exchanges heat between the heat medium 4a (heating medium) from the supply / discharge unit 4 and the air conditioner air 5, and heats the air conditioner air 5 to hot air 5H. It is for doing (heater core). The heating heat exchanger 17 is provided inside the rear case 14 in a state of being slightly tilted backward when viewed from the side.

An auxiliary heater 21 such as an electric heater may be provided on the downstream side (rear side) of the heating heat exchanger 17. By providing the auxiliary heater 21 in this way, the heating heat exchanger 17 can be miniaturized. Further, by using the auxiliary heater 21 during the warm-up operation in winter, the front seats can be quickly heated even before the engine (engine coolant) has warmed up.

The cooling heat exchanger 16 and the heating heat exchanger 17 are installed so that the lower ends thereof are aligned at substantially the same height (the lower end portion of the heating heat exchanger 17 is slightly lower). The upper end of the cooling heat exchanger 16 extends to a position substantially above the air conditioning case 2. The upper end of the heating heat exchanger 17 is installed at a height of about half that of the cooling heat exchanger 16.

The mix door 18 is installed so that the substantially central portion in the vertical direction z is located at the upper end portion of the heating heat exchanger 17. The upper part of the mix door 18 is lower than the upper part of the cooling heat exchanger 16. The mix door 18 can be, for example, a flap-type valve having a flap 18b that rotates up and down about a horizontal rotation shaft 18a. The rotating shaft 18a is installed at a position substantially at the upper end of the heating heat exchanger 17, and the flap 18b extends substantially forward from the rotating shaft 18a, and a side surface through which the tip (front end) of the flap 18b passes. The substantially arcuate portion is the entrance side opening 18c of the mix door 18.

A guide portion 22 for guiding the air conditioning air 5 to the mix door 18 is provided between the cooling heat exchanger 16 and the mix door 18. The height of the guide portion 22 gradually increases from the position of the substantially upper and lower ends of the cooling heat exchanger 16 toward the position of the substantially upper and lower ends of the entrance side opening 18c of the mix door 18 when viewed from the side. It is tapered so that the dimension in the direction becomes narrower. That is, the guide portion 22 has an upper guide wall 22a that inclines downwardly toward the rear of the vehicle and a lower guide wall 22b that inclines upwardly toward the rear of the vehicle. The guide portion 22 can be formed by the rear wall of the front case 13, the front wall of the rear case 14, and the like.

The mix door 18 has upper and lower exit side openings 18d and 18e on the downstream side (rear side). The upper outlet 18d serves as a bypass portion 19, and the lower outlet 18e faces the heating heat exchanger 17.

A warm air flow path 23a on the entry side is provided between the exit side opening 18e below the mix door 18 and the entry side of the heating heat exchanger 17. The warm air flow path 23a on the entry side is formed in the rear portion of the lower guide wall 22b described above. Then, on the outlet side of the heating heat exchanger 17, a warm air flow path 23b on the outlet side extending from the bottom to the top is provided. The hot air flow path 23a on the inlet side and the warm air flow path 23b on the outlet side are opened at the same position of the heat exchanger 17 for heating. Then, the warm air flow path 23a on the inlet side and the warm air flow path 23b on the exit side form a warm air flow path. The upper end of the hot air flow path 23b on the exit side merges with the outlet side opening 18d (bypass portion 19) above the mix door 18.

Then, the area around the bypass portion 19 where the outlet side opening 18d above the mix door 18 and the upper end portion of the hot air flow path 23b on the outlet side meet is a mixture of cold air 5C and hot air 5H for air conditioning. It is a mixing region 24 (or mixing chamber) for equalizing the temperature of No. 5 at a set temperature. In the mixing region 24, for example, a mixing promoting member 24a (FIG. 6) such as a vane can be provided to promote mixing of the cold air 5C and the hot air 5H. Further, for example, when it is desired to supply more hot air 5H to the front defroster port 7a, the side vent port 7b, the center vent port 7c, etc., some cold air 5C or hot air 5H is intentionally mixed. A guide member can be provided to prevent this from occurring. The above-mentioned air outlet portion 7 for the front seat is provided on the upper side of the mixing region 24 or the like, and the mixing region 24 is directly communicated with the air outlet portion 7 for the front seat.

The air outlet portion 7 for the front seat is provided with an outlet door 25 whose air volume can be adjusted. Each outlet door 25 can be, for example, a flap-type valve having a flap 25b that rotates up and down about a horizontal rotation shaft 25a. Between the air outlet portion 7 for the front seat and the mixing region 24, there is a region (rotation region) in which the flap 25b of each outlet door 25 rotates.

The hot air flow path 23b on the exit side is partitioned from the foot passage 27 back and forth by the passage partition wall 26 inside the air conditioning case 2, and the foot passage 27 is a mixing region via the rotation region of the flap 25b. In addition to communicating with 24, a foot opening 7d for the front seat that opens to the rear side surface of the air conditioning case 2 is provided in the middle portion thereof, and a foot for the rear seat that opens to the lower portion of the rear surface of the air conditioning case 2 is provided at the lower end portion thereof. It has a mouth 11b (see FIG. 8).

In such a vehicle air conditioner 1, the air conditioner air 5 is sent to the rear seats, and the temperature of the air conditioner air 5 can be independently controlled between the front seats and the rear seats. Therefore, in this embodiment, the following configuration is provided.

(1) As shown in FIG. 9, the first space portion 31 (FIG. 7) for sending the air conditioning air 5 to the air outlet portion 7 for the front seat through the entrance side opening 18c of the mix door 18. The air intake unit 32 is used.
Then, after providing the air conditioning case 2 in the middle of the guide portion 22 for guiding the air conditioning air 5 from the cooling heat exchanger 16 to the mix door 18 and at a position outside the first air intake portion 32. A second air intake portion 34 for the second space portion 33 that sends the air conditioning air 5 to the air outlet portion 11 for the seat is provided.

Here, the first space portion 31 for the front seats is almost the entire air passage from the mix door 18 to the air outlet portion 7 for the front seats as described above, that is, inside the air conditioning case 2. It is considered to be almost the entire internal space of the air conditioning case 2. Specifically, in the first space portion 31, the internal space of the mix door 18, the warm air flow path (the hot air flow path 23a on the inlet side and the warm air flow path 23b on the exit side), the mixing region 24, and the outlet The rotating region of the door 25, the air outlet portion 7 for the front seat, the foot aisle 27, and the like are widely included.

The second space portion 33 for the rear seats is locally located inside the air conditioning case 2 so as to reach the air outlet portion 11 for the rear seats from the position on the front side of the mix door 18 or the position of the guide portion 22. It may be a duct-like object to be passed through (see a horizontally cut perspective view of FIG. 10 and a vertically cut perspective view of FIG. 11).

In this embodiment, as described above, since the foot opening 11b for the rear seats is shared with the air outlet portion 7 for the front seats and handled in the same manner, the air outlet portion 11 for the rear seats is substantially the same. Since only the vent port 11a for the rear seats is provided, the duct-shaped second space portion 33 is provided only for the vent port 11a for the rear seats. However, if the foot opening 11b for the rear seats and the foot opening 7d for the front seats are separated and independent, both the vent opening 11a for the rear seats and the foot opening 11b are air outlets for the rear seats. Since the portion 11 is handled, it is necessary to provide a duct-shaped second space portion 33 for both the vent opening 11a and the foot opening 11b for the rear seats.

The duct shape may be a single tubular one, or as shown in FIG. 12, a duct may be formed by combining a plurality of members 35a and 35b (for example, half-split pieces). As shown in FIG. 5 (FIG. 8) and the like, a pipe line and a part thereof are included in which a partial wall portion 36 is provided inside the air conditioning case 2. Such a duct does not include a large-scale duct that divides the inside of the air conditioning case 2 into a region in the width direction y over the entire area. In this embodiment, the second space 33 for the rear seat is a small duct or the like having a substantially rectangular cross section.

(2) As shown in FIG. 9, the second space portion 33 has a cold air aisle 41 for sending cold air 5C to the rear seat air outlet portion 11 and an air outlet for the rear seat inside the first space portion 31. A warm air passage 42 for sending hot air 5H to the portion 11 may be provided.
Then, the second air intake unit 34 enters the mix door 18 and the cold air intake unit 43 that takes in the air conditioning air 5 from the position above the entrance side opening 18c of the mix door 18 into the cold air passage 41. It has a hot air intake portion 44 that takes in air conditioning air 5 from a position below the side opening 18c to the hot air passage 42.

Here, as shown in FIGS. 13 and 14, at least a part of the cold air passage 41 and the hot air passage 42, which are the second space portions 33, is relative to the partition wall 15 that divides the inside of the air conditioning case 2 into the left and right spaces. Can be attached. As a result, two types of partition walls 15 are prepared in advance: a partition wall 15 to which the cold air passage 41 and the hot air passage 42 are attached as described above, and a partition wall 15 to which the cold air passage 41 and the hot air passage 42 are not attached. By using any of these, it is easy to make a vehicle air conditioner 1 with specifications that can control the temperature of the rear seats and a vehicle air conditioner 1 with specifications that cannot control the temperature of the rear seats. Will be possible.

The cold air passage 41 partially includes the inside of the foot passage 27 (the central portion in the width direction y) and the cold air duct portion 41a on the entry side, which is arranged substantially in the front-rear direction x so as to pass through the mixing region 24 or the upper side thereof. It may have a cold air duct portion 41b (FIG. 9) on the outlet side formed by partitioning by a pair of wall portions 36. In this case, only the cold air duct portion 41a on the entry side is integrally attached to the upper portion of the partition wall 15. The pair of left and right wall portions 36 constituting the cold air duct portion 41b on the outlet side are provided between the rear wall of the air conditioning case 2 and the passage partition wall 26 at a distance substantially equal to that of the cold air duct portion 41a on the inlet side. It is a vertical wall.

The hot air passage 42 includes a hot air duct portion 42a on the inlet side arranged inside the hot air flow path 23a on the inlet side and a hot air duct on the outlet side arranged inside the hot air flow path 23b on the outlet side. It has a part 42b and. At this time, as shown in FIG. 9, the warm air passage 42 passes through the portion farthest from the mix door 18 of the heating heat exchanger 17 (for example, the lower portion). It is possible to effectively utilize the area that has not been sufficiently used so far for the one space portion 31. As a result, the influence on the first space portion 31 can be reduced. In this case, the hot air duct portion 42a on the inlet side and the hot air duct portion 42b on the outlet side are integrally opposed to each other at the lower portion of the partition wall 15 with a gap corresponding to the thickness of the heat exchanger 17 for heating. It will be attached. The hot air passage 42 may pass under the auxiliary heater 21 so as not to pass through the auxiliary heater 21.

The cold air passage 41 may have a larger cross section than the hot air passage 42. For example, the cold air passage 41 can have a flow path cross section that is approximately twice that of the hot air passage 42. As a result, a sufficient amount of cold air 5C can be sent from the rear seat vent port 11a to the upper body of the rear seat occupant in summer or the like. Further, as for the warm air 5H to the feet of the occupants in the rear seats in winter, since the foot opening 11b for the rear seats is used, there is no particular problem even if the cross section of the hot air passage 42 is smaller than that of the cold air passage 41.

The cold air intake unit 43 serves as an intake port for the cold air 5C into the cold air passage 41. Further, the hot air intake unit 44 serves as an intake port for the hot air 5H into the hot air passage 42.

(3) As shown in FIG. 1 (FIGS. 3 and 4), in the air conditioning case 2, left and right vent ports 7b and 7c are spaced 51 in the width direction y as the air outlet portion 7 for the front seats (FIG. 1). (See) may be provided and spaced apart.
Then, as shown in FIG. 10 (FIG. 11), the cold air passage 41 may be arranged through between the left and right vent ports 7b and 7c. Further, the cold air intake portion 43 may be a widening portion 52 that expands in the width direction y on the entry side of the cold air passage 41.

Here, the distance 51 in the width direction in which the left and right vent ports 7b and 7c are separated from each other can be substantially the same as or larger than the width dimension of the cold air passage 41.

The left and right front defroster openings 7a are arranged as close to each other as possible without providing the above-mentioned spacing 51 in the width direction y in order to ensure the window clearness at the center of the width of the front window glass. It is preferable to do so.

The cold air intake portion 43 on the front side of the cold air passage 41 does not interfere with the air conditioning air 5 blown out from the front defroster port 7a (resistance) or the movement of the outlet door 25 provided at the front defroster port 7a. , Installed below the front defroster opening 7a and its exit door 25 (FIG. 9). Therefore, the cold air intake portion 43 reduces the dimension in the vertical direction z to suppress the height, and the dimension in the width direction y of the cold air intake portion 43 is increased by that amount (as the widening portion 52) to reduce the height of the cold air intake portion 43. It is possible to secure a flow path cross section that is substantially the same as the downstream portion of the passage 41.

(4) As shown in FIG. 9, the cold air intake unit 43 and the hot air intake unit 44 may be installed at positions facing the cooling heat exchanger 16.

Here, the opposite means directly facing each other, and a slight deviation is acceptable, but a complete deviation is excluded. The cold air intake portion 43 is opened at a position below the upper guide wall 22a of the guide portion 22. Therefore, the cold air intake unit 43 faces the upper part of the cooling heat exchanger 16. Further, the warm air intake portion 44 is opened at a position below the lower guide wall 22b. Therefore, the hot air intake unit 44 faces the lower part of the cooling heat exchanger 16.

(5) At least a part of the cold air intake unit 43 and the hot air intake unit 44 may be located within the height range of the cooling heat exchanger 16.

Here, the height range of the cooling heat exchanger 16 is the range from the upper end portion to the lower end portion of the cooling heat exchanger 16. It is preferable that almost all of the cold air intake unit 43 and the hot air intake unit 44 are located within the height range of the cooling heat exchanger 16. In addition to locating at least part (or almost all) of the cold air intake 43 and the hot air intake 44 within the height range of the cooling heat exchanger 16, the cold air passage 41 and the hot air passage 42 However, it is preferable that at least a part thereof, preferably almost all of them, be located within the height range of the cooling heat exchanger 16 in order to reduce the size of the vehicle air conditioner 1 in the vertical direction.

(6) The cold air aisle 41 and the hot air aisle 42 meet in front of the air outlet portion 11 for the rear seats, and the second mix door 72 is arranged at the confluence portion 71 between the cold air aisle 41 and the hot air aisle 42. You may try to do it.

Here, the merging portion 71 is provided inside the outlet member 12. The second mixed door 72 may be any type. For example, like the first mixed door 18, a flap type valve or the like can be used. Further, for example, a rotary valve having a cylindrical valve body 72b that rotates up and down about a horizontal rotary shaft 72a may be used.

<Action> The action of this example will be described below.

The basic operation of the vehicle air conditioner 1 is as follows.

The air-conditioning air 5 taken into the air-conditioning case 2 from the inlet portion 6 by the blower of the blower unit is first dehumidified and cooled by the cooling heat exchanger 16 to become cold air 5C.

Next, the air-conditioning air 5 is guided by the guide portion 22 to the entrance side opening 18c of the mix door 18 and passes through the mix door 18. At the mix door 18, the air conditioning air 5 is distributed and the distribution amount is adjusted, and the air conditioning air 5 is appropriately sent to the heating heat exchanger 17 and the bypass section 19.

Of these, the air-conditioning air 5 sent from the hot air flow path 23a on the inlet side to the heat exchanger 17 for heating by the mix door 18 is heated by the heat exchanger 17 for heating to become hot air 5H, and the temperature on the outlet side becomes hot. It is sent to the mixing region 24 via the air flow path 23b.

On the other hand, the air conditioning air 5 (cold air 5C) bypassed from the bypass portion 19 by the mix door 18 is sent directly to the mixing region 24 and merges with the hot air 5H from the heating heat exchanger 17.

In the mixing region 24, the hot air 5H from the heating heat exchanger 17 and the cold air 5C bypassing the bypass portion 19 are mixed by the mixing promoting member 24a and the like, and the temperatures are equalized to reach the set temperature.

After that, the air conditioning air 5 having reached the set temperature is blown out to the front seat portion in the vehicle interior through the air outlet portion 7 for the front seat. As a result, the temperature of the front seats is controlled.

In this embodiment, the entrance (second air intake) to the second space 33 for the rear seat is further upstream (front side) of the entrance side opening 18c (first air intake 32) of the mix door 18. A built-in portion 34) is provided so that a part of the cold air 5C dehumidified and cooled by the cooling heat exchanger 16 is taken into the second space portion 33 for the rear seats before entering the mix door 18. There is. As a result, the air conditioning air 5 can be blown out from the air outlet portion 11 for the rear seats to the rear seat portion in the vehicle interior, and the temperature of the rear seats can be adjusted independently.

<Effect> According to this embodiment, the following effects can be obtained.

(Effect 1) The entire area of the entrance side opening 18c of the mix door 18 is used as the first air intake portion 32 for the first space portion 31 that sends the air conditioning air 5 to the air outlet portion 7 for the front seats. Further, in the middle of the guide portion 22 for guiding the air conditioning air 5 from the cooling heat exchanger 16 to the mix door 18, the rear seat air outlet portion 11 is located outside the first air intake portion 32. A second air intake unit 34 is provided for the second space unit 33 that sends the air conditioning air 5.

As a result, the entire area of the entrance side opening 18c of the mix door 18 can be used as the first air intake portion 32, and can be used without limitation for the first space portion 31. Further, the second air intake portion 34 for the second space portion 33 can be provided in a space-efficient manner by using the portion outside the entrance side opening 18c of the mix door 18.

With such a configuration, the second air intake unit 34 does not have an area occupying the entrance side opening 18c of the mix door 18, and moreover, the heat exchanger for heating at the mix door 18 A necessary amount of air conditioning air 5 can be taken into the second space 33 before being distributed to the 17 and the bypass 19.

Therefore, the first space portion 31 can take in a sufficient air volume from the first air intake portion 32, and the second space portion 33 can secure the required air volume from the second air intake portion 34. Therefore, in order to secure the air volume of the first space portion 31 and the second space portion 33, for example, the air conditioning case 2, the heat exchanger 16 for cooling, and the heat exchanger 17 for heating are enlarged in the width direction y and the vertical direction z. Or, it is possible to eliminate the need to increase the air volume of the blower in the blower unit.

As a result, even if the width dimension and the height dimension of the vehicle air conditioner 1 are kept relatively small, it becomes possible to have a sufficient temperature control function for the rear seats, and it is possible to suppress the increase in size of the vehicle air conditioner 1 (small size). It is possible to control the temperature of the front and rear seats independently while reducing noise (reducing noise).

(Effect 2) The second space portion 33 is divided into a cold air passage 41 and a hot air passage 42, and the cold air passage 41 and the hot air passage 42 are each (for example, in a duct shape) inside the first space portion 31. You may place it. Further, the second air intake portion 34 is located above the entrance side opening 18c of the mix door 18 and above the cold air intake portion 43 (of the cold air passage 41) and the entrance side opening 18c of the mix door 18. It may be provided separately from the hot air intake portion 44 (of the warm air passage 42) located on the lower side.

As a result, the second space portion 33 can be divided into a cold air passage 41 and a hot air passage 42 in the upper and lower parts, and can be installed comfortably inside the first space portion 31, and the upper and lower cold air intake portions 43 and the temperature can be easily installed. The air conditioning air 5 can be effectively taken into the cold air passage 41 and the hot air passage 42, respectively, from the wind intake portion 44, and the specifics for establishing the second space portion 33 (such as a duct shape). Structure can be obtained.

(Effect 3) The cold air passage 41 of the second space portion 33 may be installed so as to pass through a gap (interval 51) in the width direction y provided between the left and right vent ports 7b and 7c. Since the left and right vent ports 7b and 7c are separately provided for the driver's seat and the passenger's seat so that the air conditioning air 5 can be blown out separately, they are suitable for being separated from each other in the width direction y. The cold air passage 41 can be passed between the left and right vent ports 7b and 7c without any trouble. As a result, the inside of the first space portion 31 is not obstructed, and the flow of the air conditioning air 5 inside the first space portion 31 is not obstructed (resistive) (second space portion). A cold air passage 41 (33) can be installed. Therefore, for example, it is possible to eliminate the need to expand the air conditioning case 2 in the width direction y in order to secure an independent area for the second space 33 inside the air conditioning case 2.

Further, the cold air intake portion 43 may be used as the widening portion 52. As a result, the air conditioning air 5 cooled by the cooling heat exchanger 16 can be efficiently taken into the cold air passage 41 from a wide range in the width direction y.

A front defroster port 7a for blowing out air-conditioning air 5 for preventing window fogging toward the front window glass is provided on the upper side of the cold air intake portion 43, but the cold air intake portion 43 is widened by the widening portion 52. By setting the temperature, the height of the cold air intake portion 43 can be suppressed and the air conditioner air 5 can be provided away from the front defroster port 7a, so that the air conditioner air 5 is blown out from the front defroster port 7a, particularly the center width of the front window glass. It is possible to prevent the air conditioner air 5 from being blown out to the portion. As a result, the front defroster opening 7a can ensure good window clearness over the entire area of the front window glass.

(Effect 4) The cold air intake unit 43 and the hot air intake unit 44 may be installed at positions facing the cooling heat exchanger 16. As a result, the air conditioner air 5 cooled by the cooling heat exchanger 16 can be efficiently taken in from the cold air intake unit 43 and the hot air intake unit 44 facing the cooling heat exchanger 16.

(Effect 5) At least a part of the cold air intake unit 43 and the hot air intake unit 44 may be arranged within the height range of the cooling heat exchanger 16. As a result, the air-conditioning air 5 cooled by the cooling heat exchanger 16 can be efficiently taken in from the cold air intake unit 43 and the hot air intake unit 44 arranged at a reduced height.

Further, as described above, the cold air passage 41 and the hot air passage 42 can be easily arranged within the height range of the cooling heat exchanger 16, so that the height of the entire vehicle air conditioner 1 can be suppressed. become.

(Effect 6) A second mix door 72 may be provided at the confluence portion 71 between the cold air passage 41 and the hot air passage 42. As a result, the cold air 5C from the cold air aisle 41 and the hot air 5H from the hot air aisle 42 can be mixed at the second mix door 72 to control the temperature, and the temperature-controlled air conditioning air 5 can be used for the rear seats. It becomes possible to blow out from the air outlet portion 11.

1 Vehicle air conditioner 2 Air conditioner case 5 Air conditioner air 5C Cold air 5H Hot air 6 Inlet 7 Air outlet for front seat 7b Vent port 7c Vent port 11 Air outlet for rear seat 16 Cooling heat exchanger 17 Heating Heat exchanger 18 Mix door 18c Entrance side opening 19 Bypass part 22 Guide part 31 First space part 32 First air intake part 33 Second space part 34 Second air intake part 41 Cold air passage 42 Hot air passage 43 Cold air intake part 44 Warm air intake part 51 Interval 52 Widening part 71 Confluence 72 Second mix door x Front-back direction y Width direction z Up-down direction

Claims (5)

Inside the air-conditioning case, the cooling heat exchanger and the heating heat exchanger are arranged in order from the air-conditioning air inlet to the front seat air outlet.
A bypass that bypasses the heating heat exchanger and the heating heat exchanger for air conditioning air cooled by the cooling heat exchanger between the cooling heat exchanger and the heating heat exchanger. In a vehicle air conditioner equipped with a mixed door to be distributed to the department
The entrance side opening of the mix door is used as a first air intake portion for the first space portion for sending air conditioning air to the air outlet portion for the front seats, and also.
An air outlet for the rear seats provided in the air conditioning case at a position outside the first air intake portion in the middle of the guide portion for guiding the air conditioning air from the cooling heat exchanger to the mix door. the second air take-in portion for a second space portion for sending the conditioned air provided to,
The second space portion includes a cold air aisle that sends cold air to the air outlet portion for the rear seats and a hot air passage that sends warm air to the air outlet portion for the rear seats inside the first space portion. With
The second air intake portion is a cold air intake portion that takes in air conditioning air from a position above the entrance side opening of the mix door to the cold air passage, and a cold air intake portion that takes in air conditioning air from the entrance side opening of the mix door. A vehicle air conditioner including a hot air intake unit that takes in air conditioning air from a lower position to the hot air passage. In the vehicle air conditioner according to claim 1,
In the air-conditioning case, left and right vent ports are spaced apart from each other in the width direction as air outlets for the front seats.
The cold air passage, with disposed through between the left and right of the vent port, the cold air intake section, a vehicle, characterized in that has a widened portion extending in the width direction at the inlet side of the cool air passage Air conditioner. In the vehicle air conditioner according to claim 1 or 2.
A vehicle air conditioner characterized in that the cold air intake unit and the hot air intake unit are installed at positions facing the cooling heat exchanger. A moving vehicle air-conditioning apparatus according to any one of claims 1 to 3,
A vehicle air conditioner characterized in that at least a part of the cold air intake unit and the hot air intake unit is located within the height range of the cooling heat exchanger. A moving vehicle air-conditioning apparatus according to any one of claims 1 to 4,
The cold air aisle and the hot air aisle merge in front of the air outlet for the rear seats, and a second mix door is arranged at the confluence of the cold air aisle and the hot air aisle. Air conditioner for vehicles.

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