JP2002002255A - Air conditioning apparatus for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such an air conditioning apparatus for automobile as can properly adjust the difference of temperature in bi-level mode between the air at the vent blow-out opening and the air at foot blow-out opening with making unit case smaller in the direction of front and rear of the vehicle. SOLUTION: In the air conditioning apparatus for an automobile in which a foot blow-out opening 17 is arranged by the side of a unit case 5 and near the lower part of by-pass passage 8 of the cool air, such an arrangement is made that there are provided a cool air guide part 18 leading the air in the cool air by-pass passage 8 to the middle part of the unit case 5 in the direction of the right and left of the vehicle and a warm air guide part 19 leading the air at the lower part of the warm air passage 9 to the foot blow-out opening 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner for a vehicle in which a cooling heat exchanger and a heater are arranged in the front-rear direction of the vehicle.

[0002]

2. Description of the Related Art FIG. 7 is a longitudinal sectional view of a conventional automobile air conditioner.

[0003] This automotive air conditioner comprises a blower 201.
An evaporator 202 for cooling air from the blower 201, a heater core 203 for heating air passing through the evaporator 202, and an air mixing door 204 for adjusting a ratio of air passing through the heater core 203 and air not passing therethrough. , Unit case 2 for housing these
05.

[0004] The evaporator 202 is located in front of the heater core 203 in the vehicle front-rear direction BB.

In the unit case 205, the cool air bypass passage 20 through which the air passing through the evaporator 202 flows is provided.
8, a hot air passage 209 through which the air passing through the heater core 203 flows, and an air mix space 210 in which air downstream of the cool air bypass passage 208 and air downstream of the hot air passage 209 are mixed.

Downstream of the air mix space 210 of the unit case 205, a differential blowout opening 211, a vent blowout opening 212, and a foot blowout opening 217 are formed.

The foot outlet opening 217 is provided in the hot air passage 209.
Is located near the downstream of. A foot passage 240 is formed between the air mix space 210 and the foot outlet 217.

When the blower 201 operates, the blower 201
From the air goes to the evaporator 202.

When the blowing mode is set to the bi-level mode and the opening of the air mix door 204 is 50%, a part of the air passing through the evaporator 202 passes through the cool air bypass passage 208 to the air mix space 210,
The rest goes to the heater core 203. As the air passes through evaporator 202, it is cooled. Heater core 203
Passes through the warm air passage 209 to the air mix space 210. As the air passes through the heater core 203, it is heated.

[0010] The air downstream of the cool air bypass passage 208 and the air downstream of the hot air passage 209 are mixed with the air mix space 210.
And are mixed, and are blown out of the unit case 205 from the vent blowout opening 212 and the foot blowout opening 217.

[0011]

By the way, when the unit case 205 is arranged at the center in the left-right direction of the vehicle,
An audio unit (not shown), a control panel (not shown) of an air conditioner, and the like are arranged behind the unit case 205 behind the vehicle longitudinal direction BB.
5 must be reduced in the vehicle front-back direction BB.

As a countermeasure, it is conceivable to dispose the foot outlet in the vicinity of the side of the unit case downstream of the cool air bypass passage and move the foot passage.

However, since the cool air downstream of the cool air bypass passage easily flows into the foot outlet opening, for example, when the blow mode is set to the bi-level mode, the temperature of the air blown from the unit case to the feet of the occupant becomes lower. Drop,
There was a problem that the so-called head cold foot fever could not be realized.

The present invention has been made in view of such circumstances, and an object thereof is to reduce the temperature of the vent outlet opening and the foot outlet opening in the bilevel mode while reducing the size of the unit case in the vehicle front-rear direction. An object of the present invention is to provide a vehicle air conditioner that can make the difference appropriate.

[0015]

According to a first aspect of the present invention, there is provided an air conditioner for a vehicle, comprising: a cooling heat exchanger for cooling air from a blower; and a cooling heat exchanger for cooling the air. A heater that heats the air that has passed through, an air mix door that adjusts the ratio of air that passes through the heater and air that does not pass, a unit case that houses them, and formed in this unit case, A cold air bypass passage through which the air passing through the cooling heat exchanger flows, a hot air passage formed in the unit case, through which the air passing through the heater flows, and a cold air bypass passage formed in the unit case, An automotive air conditioner having a differential blowing opening, a vent blowing opening, and a foot blowing opening for sending downstream air and air downstream of the hot air passage, wherein the foot An opening for exit is formed on a side surface portion of the unit case, located downstream vicinity of the cool air bypass passage, the side surface of the unit case,
A cool air guide portion is provided for guiding air downstream of the cool air bypass passage to a central portion in the vehicle left-right direction in the unit case.

As described above, the foot outlet opening is formed in the side surface of the unit case, and is located near the downstream of the cool air bypass passage. Since the cold air guide portion is provided to guide the vehicle to the center in the left-right direction of the vehicle, the air downstream of the cold air passage is cooled by the cold air guide portion.
The amount of cool air that is guided to the center in the vehicle left-right direction and flows into the foot outlet opening is limited.

According to a second aspect of the present invention, in the automotive air conditioner according to the first aspect, the air in the hot air passage is guided to the foot outlet opening at a side surface of the unit case. A hot air guide is provided.

As described above, on the side of the unit case,
Since the hot air guide section for guiding the air in the hot air passage to the foot outlet opening is provided, the amount of the cold air flowing into the foot outlet opening is restricted, and the warm air flowing into the foot outlet opening is restricted. The volume increases, and the temperature of the air blown out from the foot blowing opening increases.

[0019]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a front view of an air conditioner for a vehicle according to one embodiment of the present invention, FIG. 1 is a sectional view taken along the line II of FIG. 2, and FIG. 3 (a) opens and closes a foot outlet opening. FIG. 3B is a perspective view of the mode switching door for opening and closing the vent opening and the differential opening, and FIG.
5 is a perspective view of the distribution box, FIG. 5 is a side view of the distribution box, and FIG. 6 is a conceptual diagram for explaining the flow of air in the unit case. In FIG. 1, the filter 6, the evaporator 2, and the heater core 3 are not shown in cross section.

This air conditioner for a vehicle comprises a blower 1, an evaporator (cooling heat exchanger) 2 for cooling air from the blower 1, and a heater core (heater) 3 for heating air passing through the evaporator 2. And this heater core 3
An air mix door 4 for adjusting the ratio of air passing through and air not passing therethrough, and a unit case 5 for accommodating them.

The blower 1 is located above the evaporator 2 in the vehicle vertical direction HL. The blower 1 has a fan 32, a motor (not shown) for driving the fan 32, and a casing 1c for accommodating them.

On the upstream side of the evaporator 2, a filter 6 for collecting dust in the air from the blower 1 is mounted.

The evaporator 2 is located on the front side of the heater core 3 in the vehicle longitudinal direction BB.

An electric heater (PTC) 7 that compensates for insufficient heating of the heater core 3 is disposed downstream of the heater core 3.

An air mix door 4 is arranged above the heater core 3 in the vehicle vertical direction HL. The air mix door 4 is a butterfly type door provided rotatably.

The unit case 5 is disposed at the center of the vehicle compartment in the vehicle left-right direction (FIG. 2) RL. The unit case 5 includes a unit case main body 33 and a distribution box 34. The distribution box 34 is connected to the upper part of the unit case main body 33 so as to be dividable.

The longitudinal direction B of the unit case body 33 in the vehicle longitudinal direction
Audios 36 and 37 are arranged on the rear side of B, and a steering member 38 is arranged above the distribution box 34 in the vehicle vertical direction HL.

In the unit case main body 33, a cool air bypass passage 8 through which air passing through the evaporator 2 flows,
A hot air passage 9 through which air passing through the heater core 3 flows, and an air mix space 10 in which air downstream of the cool air bypass passage 8 and air downstream of the hot air passage 9 are mixed. The air mix space 10 is located downstream of the air mix door 4.

The unit case 5 has a differential blowing opening 1.
1. A vent outlet opening 12 and a foot outlet opening 17 are formed. As shown in FIG. 2, the vent outlet opening 12 includes a right center vent outlet opening 13, a right side vent outlet opening 14, a left center vent outlet opening 15, and a left side vent outlet opening 16. I have. The right center vent opening opening 13 and the left center vent opening opening 15 are provided in the unit case body 33.
The rear surface portion 33b is located at both ends in the vehicle left-right direction RL. Audio 36, 3 is provided between the right center vent opening opening 13 and the left center vent opening opening 15.
7 are arranged. The differential opening 11, the right side vent opening 14 and the left side vent opening 16 are disposed in the distribution box 34 as shown in FIG. 38 is located on the front side in the vehicle front-rear direction BB. The opening 17 for the foot outlet is in the unit case body 3
The third side surface portion 33 a is located near the downstream of the cool air bypass passage 8. Each of the outlets 11, 13, 14, 15,
Ducts (not shown) are connected to 16 and 17, respectively.

The air in the cool air bypass passage 8 is applied to the side surface 33a of the unit case body 33.
A cold air guide portion 18 for guiding to a central portion of the vehicle 3 in the left-right direction RL, and a foot blow opening 1
7 is formed. The cold air guide 18 is located upstream of the warm air guide 19.

The air mix space 10 of the unit case 5
The mode switching doors 20 and 21 are rotatably provided downstream of. The mode switching door 21 is a mode switching door 20
Of the vehicle in the vertical direction HL.

As shown in FIG. 3A, the mode switching door 20 has an arc-shaped plate portion 22, a fan-shaped plate portion 24 fixed to both ends of the plate portion 22, and a fixed plate portion 24. Shaft 2
3 is provided. As shown in FIG. 3B, the mode switching door 21 includes a differential opening / closing door 25 for opening and closing the differential blowing opening 11, a right vent opening / closing door 26 for opening and closing the right side vent blowing opening 14, and a left side vent. This is a butterfly type door including a left vent opening / closing door 27 for opening and closing the blowing opening 16 and a rotating shaft 28 for integrally connecting the doors 25, 26, 27. The right vent opening / closing door 26 and the left vent opening / closing door 27 are inclined at the same angle with respect to the differential opening / closing door 25. The mode switching doors 20 and 21 are operated by a link mechanism (not shown), and a blowing mode is determined.

The distribution box 34 has a differential passage 29 leading to the differential outlet 11 and a right side vent outlet 14.
And a left vent passage 31 leading to the left side vent blowing opening 16. The differential passage 29 is located downstream of the differential opening / closing door 25, and the right vent passage 30 is located at the right vent opening / closing door 2.
The left vent passage 31 is located downstream of the left vent opening / closing door 27. An arc-shaped holding portion 35 that supports the rotating shaft 28 of the mode switching door 21 is formed below the distribution box 34.

Next, as an example, the operation of the automotive air conditioner when the blowing mode is set to the bi-level mode will be described. When the bi-level mode is set, as shown in FIG.
The air mix door 4 and the mode switching door 20 maintain the intermediate position, and the mode switching door 21 maintains the vent selection position.

When the blower 1 operates, the air from the blower 1 passes through the filter 6 to the evaporator 2. When the air passes through the filter 6, dust in the air is collected, and when the air passes through the evaporator 2, it is cooled.

A part of the air passing through the evaporator 2 passes through the cool air bypass passage 8, and the rest goes to the heater core 3. The air that has passed through the heater core 3 passes through the hot air passage 9.
As the air passes through the heater core 3, it is heated.

The air downstream of the cool air bypass passage 8 is guided by the cool air guide portion 18 to the air mix space 10. At this time, as shown by an arrow A in FIG. 6, the air downstream of the cool air bypass passage 8 is guided by the cool air guide portion 18 to the central portion in the vehicle left-right direction RL, so that the amount of the cool air flowing into the foot outlet opening 17. Is limited.

The air downstream of the hot air passage 9 is the hot air guide 1
The vehicle is guided by 9 to the air mix space 4. At this time, as shown by the arrow B in FIG. 6, a part of the air in the hot air passage 9 is guided by the hot air guide portion 19 and flows into the foot outlet opening 17 through above the cold air guide portion 8. The amount of warm air flowing into the foot outlet 17 increases.

The air downstream of the cool air bypass passage 8 and the air downstream of the hot air passage 9 merge in the air mix space 10,
Mixing, opening 13 for right center vent, opening 14 for right side vent and opening 1 for foot
7 is blown out of the unit case 5, and is blown out to the outside of the unit case 5 from the right side vent blowout opening 14 through the right vent passage 30 and from the left side vent blowout opening 16 through the left vent passage 31. .

According to this embodiment, when the blowing mode is set to the bi-level mode, the foot blowing opening 17
The amount of cool air flowing into the foot outlet opening 17 is limited, and the amount of warm air flowing into the foot outlet opening 17 increases, so that the temperature of the air blown out from the foot outlet opening 17 increases.
Therefore, while the unit case 5 is downsized in the vehicle front-rear direction BB, the temperature difference between the vent outlet opening 12 and the foot outlet opening 17 in the bi-level mode can be made appropriate, and so-called head and foot heat can be realized.

In the above embodiment, the hot air guide 1
Although the case where 19 is provided has been described, the temperature difference between the vent blowout opening and the foot blowout opening in the bilevel mode can be made appropriate without providing the hot air guide portion.

[0043]

As described above, according to the automotive air conditioner according to the first aspect of the present invention, the vent opening and the foot opening in the bi-level mode are reduced while the unit case is downsized in the vehicle longitudinal direction. And the temperature difference between the head and the foot can be made appropriate, and so-called head and foot heat can be realized.

According to the second aspect of the present invention, the temperature difference between the vent opening opening and the foot opening opening in the bi-level mode can be more appropriately adjusted while miniaturizing the unit case in the vehicle front-rear direction. And so-called head and foot fever can be realized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along line II of FIG.

FIG. 2 is a front view of an automotive air conditioner according to one embodiment of the present invention.

FIG. 3 is a perspective view showing a mode switching door.

FIG. 4 is a perspective view of a distribution box.

FIG. 5 is a side view of the distribution box.

FIG. 6 is a conceptual diagram for describing the flow of air in a unit case.

FIG. 7 is a longitudinal sectional view of a conventional automotive air conditioner.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 blower 2 evaporator (cooling heat exchanger) 3 heater core (heater) 4 air mix door 5 unit case 8 cold air bypass passage 9 hot air passage 11 differential blowing opening 12 vent blowing opening 17 foot blowing opening 18 cold air guide Part 19 Hot air guide part 33a Side part RL Vehicle left-right direction

Claims (2)

[Claims] 1. A cooling heat exchanger that cools air from a blower, a heater that heats air that has passed through the cooling heat exchanger, and a ratio of air that passes through the heater and air that does not pass through the heater. An air mix door for adjusting the temperature, a unit case for accommodating them, a cool air bypass passage formed in the unit case, and through which the air passing through the cooling heat exchanger flows, and formed in the unit case, A hot air passage through which the air that has passed through the heater flows, and a differential blowing opening, a vent blowing opening formed in the unit case, and for sending air downstream of the cold air bypass passage and air downstream of the hot air passage. An automotive air conditioner having a foot outlet opening, wherein the foot outlet opening is formed in a side surface of the unit case, and the cold air bypass is provided. A cool air guide portion is provided near the downstream side of the road, and is provided on a side surface portion of the unit case to guide air downstream of the cool air bypass passage to a central portion of the unit case in the left-right direction of the vehicle. Automotive air conditioners. 2. A vehicle air conditioner according to claim 1, wherein a hot air guide portion for guiding air in the hot air passage to the foot outlet opening is provided on a side surface portion of the unit case. apparatus.