JPH11208240A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the inside air of the inside air passage from mixing with the outside air of the outside air passage while in the inside/outside dual flow mode. SOLUTION: This air conditioner is provided with partition plates 10, 15a through 15c which partition inside air passages 8, 80 from outside air passages 9, 90. The partition plate 15a located on the upstream side of a heat exchanger 12 for cooling, a partition plate 15b located between the heat exchanger 12 for cooling and a heat exchanger 13 for heating, and a partition plate 15c located on the downstream side of the heat exchanger 13 for heating are disposed such that they are sequentially displaced stepwise. While in the inside/outside dual flow mode, the dynamic pressure of outside air acts on step portions a, b created by the displacement of the partition plates 15a through 15c. Thus, the outside air flows into the inside air passage 8, 80 through the step portions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention particularly relates to a high temperature heated from a foot opening by forming a passage in an air conditioning case into a first air passage on the inside air side and a second air passage on the outside air side. The present invention relates to a vehicle air conditioner in which a so-called inside / outside air two-layer flow mode can be set, in which inside air is recirculated and blown out, while low humidity outside air is blown out from a defroster opening.

[0002]

2. Description of the Related Art Conventionally, a vehicle air conditioner capable of setting a two-layer flow mode of the inside / outside air of this type is known from Japanese Patent Application Laid-Open No. 5-124426 and the like. An air intake port and an outside air intake port are formed at one end of the air conditioning case, and a foot opening, a defroster opening, and a face opening are formed at the other end.

In the air conditioning case, a first air passage extending from the inside air intake port to the face opening and the foot opening, and a second air passage extending from the outside air intake port to the defroster opening are defined. A partition plate to be formed is provided. Further, a heating heat exchanger, a bypass passage that bypasses the heating heat exchanger, and an air mixing door are provided in the air passages.

When one of the face mode, the bi-level mode, and the foot mode is selected as the blowing mode, if the inside / outside air mode at that time is the inside air circulating mode, the inside air is introduced into the two air passages. Introduce,
In the outside air introduction mode, outside air is introduced into both air passages. When the defroster mode is selected as the blowing mode, outside air is introduced into both air passages.

Further, when the foot defroster mode is selected as the blowing mode, a two-layer flow mode is adopted in which inside air is introduced into the first air passage and outside air is introduced into the second air passage. As a result, the interior air that has already been heated can be recirculated and blown out from the foot openings to heat the interior of the vehicle, so that the temperature of the air blown into the interior of the vehicle can be increased and the heating performance can be improved. At the same time, low humidity outside air is blown out from the defroster opening to the window glass, so that the anti-fog performance of the window glass can be secured.

[0006]

By the way, in consideration of the dimensional variation in the production of each component of the air conditioner and the assemblability of the heat exchanger, the partition plates of the first and second air passages and the heat exchanger are not provided. Cannot be completely separated, and a predetermined gap must be set. As a result, a situation occurs in which the inside air of the first air passage mixes with the outside air of the second air passage through the gap of the heat exchanger, and the air blown out from the defroster opening of the second air passage occurs. There is a fear that the humidity of the glass increases and the anti-fog performance of the window glass is deteriorated.

In view of the above, an object of the present invention is to prevent the inside air of the first air passage from entering the outside air of the second air passage from a gap in the heat exchanger.

[0008]

According to a first aspect of the present invention, there is provided an air conditioner for a vehicle in which a two-layer flow mode of the inside and outside air can be set. , 80) and the second air passages (9, 90) through which the outside air flows (10, 15a).
15c), and the partition plate (15c) on the downstream side of the air flow is closer to the second air passage (9, 90) than the partition plate (15b) on the upstream side of the air flow of the heating heat exchanger (13). It is characterized by being displaced in a stepwise manner.

According to this, in the blowing mode in which both the foot opening (25) and the defroster opening (19) are simultaneously opened, the inside / outside air switching means (2, 2a, 3, 4,.
When the inside / outside air two-layer flow mode is selected according to 5), the step (15b) due to the displacement between the partition plate (15b) on the upstream side of the heat exchanger for heating and the partition plate (15c) on the downstream side of the heat exchanger for heating is selected. The dynamic pressure of the outside air flowing through the second air passage (9, 90) acts on the portions (a, b), and the outside air flows into the first air passage (8, 80) through this step.

Therefore, the heat exchanger (13) and the partition plate (1)
5b, 15c), even if there is a gap, the inside air does not pass through this gap. Therefore, the inside air can be reliably prevented from being mixed into the outside air of the second air passages (9, 90), and the antifogging performance of the window glass can always be maintained satisfactorily.
Further, in the invention according to claim 2, the heat exchanger for heating (1
A cooling heat exchanger (12) is provided upstream of the air flow in (3).
The cooling air exchanger (1) is disposed so as to extend over both the air passage (8, 80) and the second air passage (9, 90).
2) a partition plate (15a) on the upstream side of the air flow, a partition plate (15b) located between the cooling heat exchanger (12) and the heating heat exchanger (13), and a heating heat exchanger ( 13) and the partition plate (15c) on the downstream side of the air flow is sequentially displaced in a stepwise manner toward the second air passage (9, 90).

According to this, both heat exchangers (12, 13)
Even if there is a gap between each of the partition plates (15a, 15b, 15c), the outside air passes through the step (a, b) portion due to the displacement of the partition plate, so that the inside air flows through the gap of the heat exchanger section. It does not pass through, and the antifogging performance of the window glass can always be kept good. Note that the reference numerals in parentheses attached to the above-described units indicate the correspondence with specific units described in the embodiments described later.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment shown in the drawings. FIG. 1 shows an embodiment of the present invention, and is applied to a low heat source vehicle in which hot water (engine cooling water) temperature is relatively low, such as a diesel engine vehicle. The air conditioner ventilation system is roughly divided into two parts, a blower unit 1 and an air conditioning unit 100. The air-conditioning unit 100 is disposed at a substantially central portion in the vehicle left-right direction in a lower portion of the instrument panel in the vehicle interior. On the other hand, the blower unit 1 is,
The state where it arrange | positions at the vehicle front side of the air conditioning unit 100 is shown. That is, the layout is such that the air conditioning unit 100 is arranged in the vehicle interior, and the blower unit 1 is arranged at a position in front of the air conditioning unit 100 in the engine room.

Here, it is also possible to adopt a layout in which the blower unit 1 is offsetly arranged on the side (passenger seat side) of the air conditioning unit 100 in the vehicle interior. First, the blower unit 1 will be specifically described. First and second two inside air inlets 2 and 2a for introducing inside air (vehicle interior air) into the blower unit 1 and outside air (outside the vehicle interior). air)
Is provided with one outside air inlet 3. These inlets 2, 2a, 3 can be opened and closed by first and second two inside / outside air switching doors 4, 5, respectively.

The inside / outside air switching doors 4 and 5 are flat plate-shaped members which are pivotally operated around the rotating shafts 4a and 5a, respectively. (Not shown) is connected to a manual operation mechanism for switching between inside and outside air (a mechanism using a lever and a dial), and is operated in conjunction with the inside or outside air switching door 4,
5 is operated in conjunction with an inside / outside air switching actuator mechanism using a servomotor.

In this embodiment, the inside / outside air switching means is constituted by the inside / outside air introduction ports 2, 2a, the outside air introduction port 3, the inside / outside air switching doors 4, 5, and the manual operation mechanism or the actuator mechanism. Then, a first (inside air side) fan 6 and a second (outside air side) fan 7 for blowing the air introduced from the inlets 2, 2 a, and 3 are arranged in the blower unit 1. The two fans 6, 7 are composed of a well-known centrifugal multi-blade fan (sirocco fan), and are simultaneously driven to rotate by one common electric motor 6b.

FIG. 1 shows a state of a two-layer flow mode which will be described later. The first inside / outside air switching door 4 opens the first inside air inlet 2 and closes the outside air passage 3 a from the outside air inlet 3. Therefore, the inside air is sucked into the suction port 6 a of the first (inside air) fan 6. On the other hand, the second inside / outside air switching door 5 closes the second inside air introduction port 2 a and closes the outside air passage 3 from the outside air introduction port 3.
Since b is open, outside air is sucked into the suction port 7a of the second (outside air side) fan 7.

Therefore, in this state, the first fan 6
The inside air from the inside air inlet 2 is supplied to the first air passage (inside air passage).
8, the second fan 7 blows outside air from the outside air inlet 3 to a second air passage (outside air side passage) 9, and the first and second air passages 8, 9 Partitioned by a partition plate 10 disposed between the first fan 6 and the second fan 7. The partition plate 10 can be integrally formed with a resin scroll casing 10a that houses the fans 6 and 7.

In this embodiment, the outer diameter of the first fan 6 is made larger and the outer diameter of the second fan 7 is made smaller. This is to prevent the opening area of the suction port 6a from decreasing on the first fan 6 side due to the presence of the electric motor 6b. Next, 100 units of the air conditioning unit are
In this type, both an evaporator (cooling heat exchanger) 12 and a heater core (heating heat exchanger) 13 are integrally incorporated. The air-conditioning case 11 is made of a plurality of resin-made divided cases, such as polypropylene, having a certain degree of elasticity and excellent strength. After storing the heat exchangers 12, 13 and devices such as doors to be described later in the plurality of divided cases, the plurality of divided cases are integrally connected by fastening means such as metal spring clips and screws. The air conditioning unit 100 is assembled.

In the air-conditioning case 11, an evaporator 12 is installed at a position closest to the front of the vehicle, and the evaporator 12 is disposed so as to cross the entire first and second air passages 80 and 90 in the air-conditioning case 11. ing. As is well known, the evaporator 12 cools the conditioned air by absorbing the latent heat of evaporation of the refrigerant in the refrigeration cycle from the conditioned air. Here, as shown in FIG. 1, the evaporator 12 is installed in the air-conditioning case 11 in a thin form in the vehicle front-rear direction.

The air passage inside the air-conditioning case 11 is
From the upstream portion of the evaporator 12 to the downstream portion of the heater core 13, the partition plate 15 a, 15 b, 15 c forms a first air passage (inside air passage) 80 on the vehicle lower side and a second air passage (open air side) on the vehicle upper side. (Passage) 90. The partition plates 15a to 15c are fixed partition members formed integrally with the air-conditioning case 11 by resin and extending substantially horizontally in the vehicle left-right direction.

The evaporator 12 is of a well-known lamination type, in which a number of flat tubes each formed by laminating two thin metal plates made of aluminum or the like in the middle are laminated and arranged with corrugated fins therebetween. It is brazed. The heater core 13 is disposed adjacent to the evaporator 12 on the downstream side of the air flow (rear side of the vehicle) at a predetermined interval. The heater core 13 reheats the cold air that has passed through the evaporator 12, in which high-temperature engine cooling water (hot water) flows, and heats the air using the cooling water as a heat source. This heater core 13 is also the evaporator 1
Similarly to 2, it is installed in the air-conditioning case 11 in a thin form in the vehicle front-rear direction.

The heater core 13 includes a partition plate 15b.
Between the first air passage 80 and the second air passage 90, the first air passage 80 and the second air passage 90.
It is arranged so as to cross the entire area of 0 and 90. In addition,
The heater core 13 is a well-known one, and is formed by laminating a large number of flat tubes formed by joining thin metal plates of aluminum or the like to have a flat cross section by welding or the like with corrugated fins interposed therebetween and brazing them integrally. In the heater core 13 of the present example, the hot water inlet side tank 13a is arranged on the lower first air passage 80 side, and the hot water outlet side tank 13b is arranged on the upper second air passage 90 side.

A heat exchange core 13c composed of the flat tube and corrugated fin is formed between the two tanks 13a and 13b. Therefore, the heater core 13 is configured as a one-way flow type (all-pass type) in which hot water from the hot water inlet side tank 13a flows in one direction from below to above in the flat tube of the heat exchange core portion 13c.

A hot water valve 14 for adjusting the flow rate of hot water (or the temperature of hot water) flowing into the heater core 13 is provided in a hot water circuit for the heater core 13, and the flow rate of hot water (or hot water temperature) of the hot water valve 14 is adjusted. The temperature of the air blown into the vehicle compartment can be adjusted by the action. That is, in the present embodiment, the hot water valve 14 constitutes a temperature adjusting means for adjusting the temperature of the air blown into the vehicle interior.

Next, a defroster opening 19 communicating with the second air passage 90 immediately after the heater core 13 is opened in the upper surface of the air conditioning case 11. This defroster opening 1
9 is for blowing air toward the inner surface of the vehicle window glass through a defroster duct and a defroster outlet (not shown). The defroster opening 19 is opened and closed by a flat defroster door 20 which is rotatable about a rotation shaft 20a.

A face opening 21 which is in direct communication with the second air passage 90 is opened at the most rear side (closer to the occupant) of the upper surface of the air conditioning case 11. The face opening 21 is for blowing air toward the occupant's head from a face outlet above the instrument panel through a face duct (not shown). The face opening 21 is opened and closed by a butterfly-shaped face door 22 that is rotatable about a rotation shaft 22a.

A communication port 23 for communicating between the first and second air passages 80 and 90 is provided between the most downstream end of the partition plate 15c and the wall surface 11a of the air conditioning case 11.
Is provided. In the lower surface of the air-conditioning case 11, a foot opening 25 is opened at a portion on the vehicle rear side, and the foot opening 25 is formed at a portion of the first air passage 80 on the air downstream side of the heater core 13 for a foot. It communicates via the inlet 26. The foot opening 25 is for blowing warm air from a foot outlet to a foot of an occupant in the vehicle cabin through a foot duct (not shown).

A flat foot door 27 is disposed between the foot inlet 26 and the communication port 23 so as to be rotatable by a rotating shaft 27a. The foot door 27 allows the foot inlet 26 and the communication port 23 to be opened and closed. Is done. The defroster door 20, the face door 22, and the foot door 2
Reference numeral 7 denotes a blow mode switching door means, which is connected to a blow mode switching manual operation mechanism of an air conditioning operation panel via a link mechanism, a cable, and the like (not shown) to operate interlockingly or to perform a blow mode switching. Are interlocked by a mode switching actuator mechanism using a servomotor.

The hot water valve 14 is a temperature adjusting means, and is operated by being connected to a manual operating mechanism for temperature adjustment of an air conditioning operation panel via a link mechanism, a cable or the like (not shown), or using a servo motor. It is operated by the temperature control actuator mechanism. In the above-described configuration, the present invention provides a partition plate 15a to 15c for partitioning the first and second air passages 80 and 90 in the air conditioning unit 100.
Is characterized by the arrangement form of. That is, a plurality of partition plates 15a to 15a to
The position (placement) of 15c is sequentially shifted stepwise toward the second air passage 90 side.

More specifically, the position of the most upstream partition plate 15a is set at the lowest position, and the position of the middle partition plate 15b is higher than the most upstream partition plate 15a by a predetermined amount of step a. . The position of the most downstream partition plate 15c is set higher than the middle partition plate 15b by a predetermined amount of step b. Here, normally, the step a and the step b may have the same size.

Incidentally, between the evaporator 12 and the partition plate 15a, between the evaporator 12 and the partition plate 15b, the heater core 1
3 and the partition plate 15b, and between the heater core 13 and the partition plate 15c, each having a predetermined size in consideration of dimensional variations in manufacture of air conditioner components, assemblability of a heat exchanger, and the like. A gap (not shown) is provided. next,
The operation of this embodiment in the above configuration will be described for each blowing mode.

(1) Foot blowing mode When the maximum heating state is set, for example, when heating is started in winter, the inside / outside air switching operation mechanism is operated to set the two-layer flow mode. That is, in the blower unit 1, the first inside / outside air switching door 4 opens the first inside air introduction port 2 and closes the outside air passage 3 a from the outside air introduction port 3. Further, the second inside / outside air switching door 5 closes the second inside air introduction port 2a and opens the outside air passage 3b from the outside air introduction port 3.

Accordingly, the first blower fan 6 sucks the inside air from the first inside air inlet 2 through the suction port 6a, and at the same time, the second blower fan 7 draws the outside air from the outside air inlet 3 to the outside air passage. 3b, inhalation is performed via the inlet 7a. The inside air blown by the first blower fan 6 flows through the first air passage 8 and the first air passage 80 of the air conditioning unit 100. Outside air blown by the second blower fan 7 flows through the second air passage 9 and the second air passage 90 of the air conditioning unit 100.

On the other hand, when the operation mode switching operation mechanism is operated, the foot door 27 is opened to open the foot inlet 26 and is moved to the solid line position closing the communication port 23. The face door 22 closes the face opening 21. The defroster door 20 is operated in the middle between the solid line position and the two-dot chain line position as shown to open a small amount of the defroster opening 19.

On the other hand, at the time of maximum heating, the hot water valve 14 is fully opened by the temperature adjusting operation mechanism.
The maximum flow of warm water flows through 3. And the first air passage 8
After passing through the evaporator 12, the inside air flowing through the heater core 13 is heated by the heater core 13 to become warm air, and the foot inlet 2
6. The air blows out to the feet of the occupant in the passenger compartment through the foot opening 25.

At the same time, the outside air flowing through the second air passage 90 passes through the evaporator 12, is heated by the heater core 13, becomes hot air, and blows out to the inner surface of the vehicle window glass through the defroster opening 19. In this case, in the first air passages 8 and 80, since the inside air having a higher temperature than the outside air is recirculated and heated by the heater core 13, the temperature of the warm air blown out to the feet of the occupant increases, and the heating effect is reduced. Can be improved.

On the other hand, since the outside air having a lower humidity than the inside air is heated and blown out from the defroster opening 19,
The fogging of the window glass can be satisfactorily performed. Moreover, since the positions of the plurality of partition plates 15a to 15c are sequentially shifted stepwise toward the second air passage 90 as going from the upstream to the downstream of the air flow, the position between the evaporator 12 and the partition plates 15a and 15b is reduced. Even if there is a gap of a predetermined size between the heater core 13 and the partition plates 15b and 15c, the inside air of the first air passage 80 is removed from the second air passage 90 in the above-described inside / outside air two-layer flow mode. Can be prevented from being mixed into the outside air.

That is, the plurality of partition plates 15a to 15c
Are sequentially shifted stepwise toward the second air passage 90, the dynamic pressure of the outside air in the second air passage 90 acts on the steps a and b. As a result, part of the outside air passing through the evaporator 12 flows into the first air passage 80 through the gap defined by the step a as shown by the arrow A. Similarly, part of the outside air of the second air passage 90 passing through the heater core 13 flows into the first air passage 80 through the gap formed by the step b as shown by the arrow B.

Therefore, the heat exchangers 12 and 13 and the partition plate 1
Even if there is a gap between 5a, 15b and 15c,
No inside air passes through this gap. Therefore, the second
Mixing of the inside air into the outside air of the air passage 90 can be reliably prevented, and the anti-fog performance of the window glass can always be maintained in a favorable state. In the foot blowing mode, the defroster opening 1 is usually used.
9 is set to about 20%, and the amount of air blown out from the foot opening 25 is set to about 80%. The defroster door 20 reduces the degree of opening of the defroster opening 19 and the second air. Part of the outside air temperature on the side of the passage 90 is passed through the gap formed by the steps a and b to form the first air passage 8.
The above air volume ratio can be achieved by mixing in the inside air temperature on the 0 side.

Next, when the cabin temperature rises and the heating load decreases, the hot water valve 14 is operated from the fully open position (maximum heating state) to the intermediate opening position to control the temperature of the blown air. Reduce the incoming hot water flow. In the intermediate temperature control area, since the maximum heating capacity is not required,
Usually, the inside / outside air suction mode is preferably set to a whole outside air mode in which the first and second inside air introduction ports 2 and 2a are both closed and the outside air introduction port 3 is opened. However, by setting by manual operation of the occupant, the outside air inlet 3 is closed and the first and second inside air inlets 2 and 2a are both opened to set a full inside air mode. Can be set to a two-layer flow of inside / outside air in which air is introduced simultaneously.

(2) Foot Defroster Blowout Mode In the foot defroster blowout mode, the defroster door 20 is used to make the amount of air blown out from the foot opening 25 substantially equal to the amount of air blown out from the defroster opening 19 (by 50%). , The defroster opening 19 is fully opened. Further, the foot inlet 27 is opened by the foot door 27, the communication port 23 is closed, and the face opening 21 is closed by the face door 22.

By fully opening the defroster opening 19,
The air volume of the outside air temperature flowing into the defroster opening 19 from the second air passage 90 increases, and the air volume blown out from the foot opening 25 and the air volume blown out from the defroster opening 19 can be made substantially equal. Becomes At the time of maximum heating in which the hot water valve 14 is fully opened, a two-layer flow mode of the inside and outside air is set, and both the improvement of the heating effect and the defogging property of the window glass can be achieved at the same time as the foot blowing mode. It is. Further, a desired intermediate temperature control is possible by adjusting the opening degree of the hot water valve 14, and in the intermediate temperature control region, the whole outside air mode is usually set. Or an internal / external air two-layer flow mode.

Also, in the two-layer flow mode of the inside and outside air in the foot defroster blowing mode, the dynamic pressure of the outside air in the second air passage 90 acts on the steps a and b, so that the heat exchangers 12 and 13 and the partition plate 15a , 15b, 15c, there is no passage of inside air through this gap. Therefore, the inside air can be reliably prevented from being mixed into the outside air of the second air passage 90, and the anti-fog performance of the window glass can always be maintained satisfactorily.

(3) Defroster blowing mode In the defroster blowing mode, the defroster door 20
Fully opens the defroster opening 19, the face door 22 fully closes the face opening 21, and the foot door 27 fully closes the foot entrance 26, respectively. Therefore, the communication port 23
Is fully opened. Therefore, the first and second air passages 8
The entire amount of the conditioned air from 0, 90, the defroster opening 19
Through the window glass only to prevent fogging. At this time, in order to secure the antifogging property of the window glass, the whole outside air suction mode is usually set. (4) Face blowing mode In the face blowing mode, the face door 22 fully opens the face opening 21, the defroster door 20 fully closes the defroster opening 19, and the foot door 27 fully closes the foot inlet 26. Accordingly, the communication port 23 is fully opened. Therefore, the first and second air passages 80, 9
Each of the downstream portions of 0 communicates with the face opening 21.

For this reason, the cool air cooled by the evaporator 12 is reheated by the heater core 13 and temperature-adjusted, and then is all blown out to the face opening 21 side. Also at this time, the inside / outside air suction mode can be selected by the first and second inside / outside air switching doors 4 and 5, any of all inside air, all outside air, and two-layer inside / outside air flow. In the maximum cooling state, a full inside air suction mode is set, the hot water valve 14 is fully closed, and the circulation of hot water to the heater core 13 is shut off.

(5) Bi-level blowing mode In the bi-level blowing mode, the face door 22 fully opens the face opening 21 and the foot door 2
7 fully opens the foot inlet 26 and completely closes the communication port 23. The defroster door 20 fully closes the defroster opening 19. Therefore, the face opening 21 and the foot opening 25
, The wind can be blown out simultaneously from both the upper and lower sides of the cabin.

Here, since the heater core 13 is of a one-way flow type, the temperature of the blown air on the side of the first air passage 80 located on the inlet side of the hot water is increased on the outlet side of the heater core 13 and located on the outlet side of the hot water. The temperature of the blown air on the side of the second air passage 90 can be reduced. Therefore, even in the all outside air mode or the all inside air mode, the first air passage 8
Since the face blowing temperature from the second air passage 90 can be made lower than the foot blowing temperature from 0, the vehicle interior temperature distribution can be made to be in a comfortable state of a head-and-foot hot type.

(Other Embodiments) The present invention can be embodied in various forms without being limited to the above embodiments.
Another embodiment of the present invention will be described. In the above embodiment, the hot water valve 14 for adjusting the flow rate (or the temperature of the hot water) of the hot water flowing into the heater core 13 is provided in the hot water circuit for the heater core 13, and the hot water flow rate (or the hot water temperature) of the hot water valve 14 is controlled. Although the temperature of the air blown into the vehicle cabin can be adjusted by the adjusting action, the air flow rate is adjusted by adjusting the ratio of the amount of hot air passing through the heater core 13 and the amount of cold air bypassing the heater core 13, so-called so-called adjusting. The present invention can be applied to an air-mix type air conditioner.

In the bi-level blowing mode, the defroster opening 19 may be slightly opened. For example, the ratio of the amount of air blown out from the face opening 21, the foot opening 25, and the defroster opening 19 is, for example,
Each opening 21, 25, 45:40:15
The opening degree of 19 may be set, and the wind may be blown out of all of the openings 21, 25, and 19 at the same time.

The present invention can be applied to an air conditioner in which the evaporator (cooling heat exchanger) 12 is not provided in the air conditioning unit 100.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a ventilation system according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blower unit, 2, 2a ... Inside air introduction port, 3 ... Outside air introduction port, 4, 5 ... 1st, 2nd inside / outside air switching door, 6, 7 ...
First and second fans, 8, 80 ... first air passages, 9, 90
... second air passage, 11 ... air conditioning case, 12 ... evaporator, 1
3: heater core, 10, 15a to 15c: partition plate, 1
9 ... Defroster opening, 20 ... Defroster door, 21 ...
Face opening, 22 ... Face door, 23 ... Communication port,
25: Foot opening, 27: Foot door, 100: Air conditioning unit, a, b: Step.

Claims (2)

[Claims] 1. An inside / outside air switching means (2, 2a, 3, 4, 5) capable of selecting a two-layer inside / outside air mode in which both of the inside air and outside air are separately sucked in simultaneously as a suction mode of the conditioned air.
A heating heat exchanger (13) for heating the conditioned air sucked through the inside / outside air switching means (2, 2a, 3, 4, 5)
And a foot opening (25) that blows out the conditioned air that has passed through the heating heat exchanger (13) toward the feet of the passengers in the vehicle cabin.
A defroster opening (1) for blowing the conditioned air that has passed through the heating heat exchanger (13) toward the inner surface of the vehicle window glass.
9) a first flow of the inside air from the inside / outside air switching means (2, 2a, 3, 4, 5) toward the foot opening (25);
An air passage (8, 80); a second air passage (9, 90) through which the outside air flows from the inside / outside air switching means (2, 2a, 3, 4, 5) toward the defroster opening (19). A partition plate (10, 15a) for partitioning between the first air passage (8, 80) and the second air passage (9, 90);
15c), and the heating heat exchanger (13) is connected to the first air passage (8,
80) and the second air passage (9, 90), and the air flow is higher than the partition (15b) on the upstream side of the air flow of the heating heat exchanger (13). Downstream partition (15
An air conditioner for a vehicle, wherein c) is arranged in a stepwise manner toward the second air passage (9, 90). 2. A cooling heat exchanger (12) is provided upstream of an air flow of the heating heat exchanger (13) with the first air passage (8, 80) and the second air passage (9, 90). And a partition plate (15a) on the upstream side of the air flow of the cooling heat exchanger (12), the cooling heat exchanger (12), and the heating heat exchanger ( 13) and a partition plate (15)
b) and the partition plate (15c) on the downstream side of the air flow of the heating heat exchanger (13) are connected to the second air passages (9, 9).
2. The vehicle air conditioner according to claim 1, wherein the air conditioner is sequentially displaced in a stepwise manner toward the 0) side.