JPH07172144A - Vehicular air conditioner - Google Patents

Abstract

PURPOSE:To prevent the blowoff temperature of warm air from being lowered by arranging heating source in an air duct frontward from a front seat, provid ing warm air blowoff port for a rear seat on the downstream side, and providing a member for forming an insulating space between an air passage on the up stream side of the heating source on the bottom face along the outer surface of an air duct and an adjacent warm air passage. CONSTITUTION:A dividing part 26 is formed in an air duct 21, and a heater core 28 as a heating source is arranged on a heating passage 27 on the downstream side and joined to an air passage 23 on a joint part 29. And warm air blowoff ports 31, 32 for front and rear seats are formed near the joint. A warm air passage 39 for the rear seat extended from the warm air blowoff port 32 is integrally provided along the outer surface of the air duct 21, and a cover 40 is attached to the bottom surface, so as to form the warm air passage, so as to cover the whole narrow part 25, and so as to be extended to the position adjacent to the air passage 23. A rib 43 is formed on the outer surface of the narrow part 25, and a foam heat-insulating paper 44 as a heat insulating member is pinched between the narrow part and the warm passage cover 40, so as to separate the air passage 23 from the warm air passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner which is provided in front of a front seat of a vehicle and blows warm air to the rear seat side.

[0002]

2. Description of the Related Art Recently, in order to reduce the size of air conditioners, FIG.
As shown in (1), an integrated air conditioner arranged in the center of the dashboard of the vehicle is provided. In this integrated type, the evaporator 2 and the heater core 3 are provided in the air duct 1.
Since it is configured to generate the conditioned air by blowing air from the blower 4, it is possible to reduce the overall shape as compared with the case where the air duct is composed of a plurality of units.

FIG. 8 shows an example of this type of air conditioner. In FIG. 8, a blower fitting port 6 is formed on the wall surface of the air duct 5, and a blower is attached to the blower fitting port 6. An air passage 7 is formed in the air duct 5 following the blower fitting port 6, and an evaporator 8 is arranged in the air passage 7. A heating passage 9 is formed so as to be branched from the air passage 7 and merge with the air passage 7, and a heater core 10 is arranged in the heating passage 9.

Here, an air mix damper 12 is provided in the flow dividing portion 11 that divides the air passage 7 into the heating passage 9, and the proportion of the cool air that is divided into the heating passage 9 from the air passage 7 according to the opening degree. Is adjusted to adjust the blowout temperature.

By the way, as the air mix damper 12, it is necessary to use a small one in order to miniaturize the air duct 5. Therefore, the opening area of the flow dividing portion 11 is set small, and the constricted portion 13 is formed on the bottom surface of the air duct 5 in order to realize such a configuration.

Further, a warm air outlet 14 for the front seat and a warm air outlet 15 for the rear seat are formed in the upper part of the air duct 5, and the warm air whose temperature is adjusted according to the opening degree of the damper 16 is blown into the warm air. The air is blown from the outlets 14 and 15. In this case, since it is necessary to guide the warm air blown out from the rear seat warm air outlet 15 to the rear seat, a rear seat warm air passage 17 extending downward along the outer surface of the air duct 5 is provided integrally with the air duct 5, The rear air duct 18 is connected to the warm air outlet of the rear warm air passage 17.

When the front seat is a bench seat, the occupant sitting in the center of the front seat cannot position his / her feet below the air duct 5 in the air conditioner having the structure shown in FIG. The feet are cramped. Therefore, as shown in FIG. 9, it is considered that the rear seat warm air passage 17 is extended backward along the bottom surface of the air duct 5 and the rear seat warm air passage 17 is connected to the rear seat ventilation duct 18. . With such a configuration, the occupant sitting in the center of the front seat can position his / her feet below the air duct 5, so that the occupant does not have to feel cramped.

[0008]

However, in the configuration shown in FIG. 9, the warm air passage 17 for the rear seat is arranged to extend to the constricted portion 13 at the inner bottom of the air duct 5, so that the constricted portion 13 is formed. In, the rear warm air passage 17 and the air passage 7 in the air duct 5 are adjacent to each other.
Therefore, heat is exchanged between the warm air passing through the rear seat warm air passage 17 and the cool air passing through the air passage 7 in the constricted portion 13, so that the temperature of the warm air blown for the rear seat is lowered. However, there is a drawback that the set temperature cannot be obtained.

The present invention has been made in view of the above circumstances, and an object thereof is to blow warm air in a structure in which warm air is guided along the bottom surface of the air duct to a position adjacent to the air passage in the air duct and blows out. An object of the present invention is to provide a vehicle air conditioner that can prevent the temperature from decreasing.

[0010]

In a vehicle air conditioner of the present invention, an air duct is provided in front of a front seat, a heating source is disposed in the air duct, and a warm air blowing for the rear seat is provided downstream of the heating source. A warm air passage for the rear seat that has an outlet and guides the warm air blown out from the warm air outlet for the rear seat along the outer surface of the air duct to a position adjacent to the air passage on the upstream side of the heating source on the bottom surface of the air duct. And a heat insulating member that forms a heat insulating space that separates the bottom surface of the air duct adjacent to the air passage from the rear seat warm air passage.

[0011]

The cold air passing through the air duct is heated as it passes through the heating source and is discharged as warm air from the rear seat warm air outlet. Then, the blown-out warm air is guided by the rear seat warm air passage along the bottom surface of the air duct to a position adjacent to the air passage on the upstream side of the heating source. At this time, since a heat insulating space is formed by the heat insulating member between the bottom surface of the air duct adjacent to the air passage and the rear seat warm air passage,
There is no heat exchange between the warm air passing through the rear seat warm air passage and the air passage in the air duct, so that the temperature of the warm air blown to the rear seat does not drop.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows the entire air conditioner in a vertical section. In FIG. 1, a blower fitting port 22 is formed on the wall surface of the air duct 21.
Blower is attached to 2.

FIG. 2 shows a blower. In FIG. 2, the blower 101 includes a motor 1 in a blower duct 102.
The sirocco fan 104 which rotates by 03 is provided, and the outside air introduction port 105 and the inside air introduction port 106 are provided corresponding to the suction path of the sirocco fan 104. These outside air inlet 105 and inside air inlet 10
6, an inside / outside air switching damper 107 is provided, and the inside air or the outside air is sucked into the blower duct 102 according to the opening / closing of the inside / outside air switching damper 107. The blower 101 having such a configuration is attached to the air duct 21 so that the blower port 108 communicates with the blower fitting port 22.

Returning to FIG. 1, an air passage 23 is formed in the air duct 21 continuing from the blower fitting port 22, and an evaporator 24 is arranged in the air passage 23. The bottom surface of the air duct 21 is formed into a constriction,
A flow dividing portion 26 having a small opening area is formed in the air duct 21 corresponding to the constricted portion 25. A heating passage 27 is formed on the downstream side of the flow dividing portion 26 so as to divide the air passage 23, and a heater core 28 serving as a heating source is arranged in the heating passage 27. The heating passage 27 joins the air passage 23 at the joining portion 29.

An air mix damper 30 is provided in the flow dividing portion 26, and the air mix damper 30 is provided.
The amount of cold air supplied from the air passage 23 to the heating passage 27 is set through the flow dividing portion 26 in accordance with the opening degree of the.

On the other hand, in the air duct 21, the merging portion 2
A warm air outlet 31 for the front seat and a warm air outlet 32 for the rear seat are formed in the vicinity of 9 and the warm air outlet 3 of these is also provided.
A damper 33 is provided corresponding to each of the dampers 1, 32, and the mixing amount of warm air from the heating passage 27 and cool air from the air passage 23 is adjusted according to the opening degree of the damper 33 to generate warm air at a predetermined temperature. To be done. Further, a central vent outlet 34 and a differential outlet 35 are provided in the upper part of the air duct 21, and the damper 3 is provided corresponding to each outlet 34, 35.
6 and 37 are provided, and the blowing amount of the conditioned air into the vehicle compartment is set according to the opening degrees of the dampers 36 and 37. Further, on both upper wall surfaces of the air duct 21, both-side vent outlets 38 are formed.

A rear seat warm air passage 39 continuing from the rear seat warm air outlet 32 is integrally provided along the outer surface of the air duct 21, and the tip of the rear seat warm air passage 39 extends to the middle of the side surface of the air duct 21. A container-shaped warm air passage cover 40 (see FIG. 5) is attached to the bottom surface of the air duct 21, and a rear seat warm air passage 41 is formed between the air duct 21 and the air duct 21 in the attached state. In addition, the rear seat warm air passage 41 and the rear seat warm air passage 39 communicate with each other.

Here, the warm air passage cover 40 covers the entire constricted portion 25 formed on the bottom surface of the air duct 21, so that the rear seat warm air passage 41 extends to a position adjacent to the air passage 23 in the air duct 21. It is set up. A rear seat warm air outlet 42 is formed at a portion of the warm air passage cover 40 corresponding to the constricted portion 25.

In FIG. 3 showing the lower part of the air duct 21, a plurality of ribs 43 are formed on the outer surface of the constricted portion 25 formed on the bottom surface of the air duct 21.
A foamed insulating paper 44, which is a heat insulating member, is sandwiched between the warm air passage cover 40 and the warm air passage cover 40.

That is, in FIG. 4 showing the sandwiching structure of the foam insulation paper 44, a step portion 43a is formed at the tip of the outermost rib 43 of the plurality of ribs 43. The rib 43 is sandwiched between the end surface of the warm air passage cover 40 and the stepped portion 43a of the rib 43.
In this case, a plurality of rods 45 are provided upright on the warm air passage cover 40, and the peripheral edge portion of the foam insulation paper 44 is sandwiched between the rods 45 and the ribs 43. With the above-described configuration, the constricted portion 25 formed on the bottom surface of the air duct 21 is closed by the foam insulation paper 44, and in the closed state, the insulation space 46 is formed between the foam insulation paper 44 and the bottom surface of the air duct 21. Are formed.

The air conditioner having the above structure is mounted in the center of the dashboard of the vehicle and, in the mounted state, communicates with the rear seat warm air outlet 42 formed in the warm air passage cover 40 as shown in FIGS. Rear seat air duct 4
7 is connected.

Next, the operation of the above configuration will be described. For example, when it is set to warm the feet by introducing the outside air when the outside air temperature is extremely low as in the winter, the air duct 2
The temperature of the air passage in 1 has dropped to about the same temperature as the outside air.
The air mix damper 30 is controlled to have an opening degree that guides most of the cool air passing through the air passage 23 to the heating passage 27. As a result, the air flow passage 23 is separated from the flow dividing portion
Most of the cool air that has passed through passes through the heating passage 27, is heated by the heater core 28 at the time of passage, and is blown to the merging portion 29.

At this time, since the damper 33 is open, the conditioned warm air is blown out from the front seat warm air outlet 31 and the rear seat warm air outlet 32 provided in the upper portion of the air duct 21. As a result, the warm air blown from the warm air outlet 31 for the front seat is blown to the feet of the front seat. The warm air blown from the rear seat warm air outlet 32 is guided to the bottom surface of the air duct 21 through the rear seat warm air passages 39 and 41, and the rear seat warm air outlet 42 provided in the warm air passage cover 40. Since it is blown to the rear seat side through the rear seat air duct 47, warm air is blown to the feet of the rear seat.

By the way, as a result of the blowing as described above, the upper side of the constricted portion 25 in the air duct 21 is cooled by the outside air, while the lower side of the constricted portion 25 is heated by the warm air passage 41 for the rear seat. Since it is warmed up by heat, heat exchange is performed between the warm air and the cold air, and there is a risk that the temperature at which the warm air blows out to the rear seat side decreases. However, in the case of the present embodiment, since the constricted portion 25 of the air duct 21 is closed by the foam insulating paper 44, the heat insulating space portion 46 for isolating the constricted portion 25 and the warm air passage 41 for the rear seat is formed. In addition to the foam insulation paper 44, the heat insulation effect of the heat insulation space 46 effectively prevents the temperature of the warm air blown to the rear seat side from being lowered by heat exchange with the cold air passing through the air passage 23. it can.

According to the above structure, the air duct 21
Since the heat insulating space 46 is formed by closing the constricted portion 25 formed on the inner bottom surface with the foam insulation paper 44, the warm air introduced to the bottom surface of the air duct is heat-exchanged with the cool air in the air duct. Unlike the conventional example, it is possible to prevent the temperature of blown warm air to the rear seat side from decreasing.

Further, as compared with a structure in which a tubular duct for guiding warm air is integrally provided on the outer surface of the air duct 21, a warm air passage cover 40 for forming a warm air passage 41 for the rear seats.
Since it can be formed by itself, it can be implemented with a simple structure.

Further, in the above embodiment, the air duct 21
Since the foam insulation paper 44 that closes the narrowed portion 25 is arranged so as to be substantially flush with the bottom surface of the air duct 21, the resistance to blowing warm air passing through the rear warm air passages 39 and 41 is reduced, and the amount of air blown is reduced. Can be increased and noise can be reduced.

In the above embodiment, the foam insulation paper 44 is sandwiched between the ribs 43 of the air duct 21 and the warm air passage cover 40. Instead of this, the foam insulation paper 44 is replaced by the ribs 43. It may be attached. Further, instead of the foam insulation paper 44, foam plastic or foam rubber may be used.

[0029]

As is apparent from the above description, according to the vehicle air conditioner of the present invention, the rear seat for guiding the warm air along the bottom surface of the air duct to the position adjacent to the air passage in the air duct. Since the heat insulating member forms the heat insulating space so as to separate the warm air passage from the air passage, the warm air is guided along the bottom surface of the air duct to a position adjacent to the air passage in the air duct and blown out. In the above, there is an excellent effect that it is possible to prevent the blowing temperature of warm air from decreasing.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a blower

FIG. 3 is a vertical cross-sectional view of the main part

FIG. 4 is an enlarged cross-sectional view showing a holding structure of a heat insulating member.

[Fig. 5] Overall bottom view

FIG. 6 is a view corresponding to FIG. 5 showing the attached state of the air duct.

FIG. 7 is a schematic diagram showing an air conditioning path in a conventional example.

FIG. 8 is a view equivalent to FIG.

FIG. 9 is a view corresponding to FIG. 1 showing a different conventional example.

[Explanation of symbols]

Reference numeral 21 is an air duct, 23 is an air passage, 24 is an evaporator, 28 is a heater core (heating source), 30 is an air mix damper, 32 is a rear seat warm air outlet, 39 and 41 are rear seat warm air passages, and 44 is foam insulation. Paper (heat insulating member) 47 is a rear-seat air duct.

Claims (1)

[Claims] 1. An air duct provided in front of a front seat, a heating source provided in the air duct, a warm air outlet for the rear seat provided downstream of the heating source, and an outer surface of the air duct. A rear seat warm air passage for guiding the warm air blown out from the rear seat warm air outlet to a position adjacent to the upstream air passage of the heating source on the bottom surface of the air duct; An air conditioner for a vehicle, comprising: a heat insulating member that forms a heat insulating space that separates the bottom surface of the adjacent air duct from the warm air passage for the rear seat.