JP4435346B2 - Air conditioner unit for automobile - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner unit for an automobile, and in particular, by arranging the air conditioner unit in a central portion in the instrument panel, in order to increase other space in the instrument panel and effectively use the instrument panel. Relates to the layout of the air conditioning unit.
[0002]
[Prior art]
Conventionally generally used automotive air conditioner units are generally called horizontal installation types. In this type, the blower unit, the cooler unit, and the heater unit are arranged in a straight line in the vehicle lateral direction (width direction).
[0003]
In this horizontal installation type, each unit is arranged over almost half of the space inside the instrument panel of the vehicle in the vehicle width direction (front portion on the passenger seat side) when mounted on the vehicle. It occupies a very large part of the space inside the instrument panel.
[0004]
However, in recent years, the space for mounting air conditioner units in the instrument panel has been reduced due to the increase in in-vehicle computers accompanying the shift to electronic electronics, the installation of CD changers in the cabin, and the increased installation of passenger airbags. The horizontal type air conditioner unit has become increasingly difficult to mount on a vehicle.
[0005]
Therefore, a center-placed type structure in which an air conditioner unit in which the evaporator for the cooler and the heater core are arranged in the vehicle front-rear direction and integrated is installed in the center of the vehicle and only the blower is arranged offset in the width direction from the center of the vehicle is also considered. It has been. According to this center-placement type layout, the evaporator for the cooler and the heater core are centrally installed in the center of the vehicle, so it is easy to secure space in the instrument panel. Since the air conditioner heat exchangers (evaporator, heater core) are arranged substantially vertically in a narrow space, it is necessary to install a blower duct portion for introducing blown air from the blower to the front side of the evaporator. Similarly, a blower duct portion through which blown air that has passed through the heater core flows is also required on the vehicle rear side of the heater core.
[0006]
Thus, since the ventilation duct part is needed before and behind an evaporator and a heater core, there exists a problem that the dimension of a vehicle front-back direction will become large.
[0007]
[Problems to be solved by the invention]
The above-described problem can be achieved by reducing the mounting space of the air conditioner unit by adopting the layout of JP-A-9-240247 and JP-A-11-291747. However, in the arrangement layout of the air conditioner unit described in the above publication, air introduced into the air conditioner unit is once introduced into an evaporator (cooling heat exchanger) of the air conditioner unit regardless of outside air or inside air, and is cooled and dehumidified.
[0008]
According to the above publication, the air introduced into the air conditioner unit is dehumidified and cooled by an evaporator once during heating as well as during cooling. During heating, the cooled air is sent to the heater unit and heated there. Since the cooled air is sent to the heater unit, the amount of heat for heating the air in the heater unit is larger than that in the case of heating from room temperature, so that there is a problem that the amount of fuel consumption increases. Further, when the air conditioner unit is operated, air must pass through the evaporator and the heater unit except during the maximum cooling, and the airflow resistance is increased.
[0009]
Therefore, in view of the above points, the present invention makes it easy to mount even a narrow interior space by adopting a heat exchanger layout pursuing space efficiency, and further consumes no fuel by using extra heat energy. The purpose is to provide an air conditioning unit for automobiles that can reduce the amount of electricity.
[0010]
[Means for Solving the Problems]
That is, the invention described in claim 1 of the present application includes an inside / outside air switching box for switching and introducing inside air and outside air, an air introduction surface and an air discharge surface, and cools the air sent from the inside / outside air switching box. A cooling heat exchanger, an air introduction surface and an air discharge surface, a heating heat exchanger for heating air sent from the inside / outside air switching box, and the cooling heat exchanger and / or heating An air conditioner unit for blowing air that has passed through the heat exchanger into an automobile room, wherein the cooling heat exchanger and the heating heat exchanger form a mutual air introduction surface. Arranged so as to form a V-shape with an angle of 60 ° to 120 °, and further rotates around the V-shaped root portion between the cooling heat exchanger and the heating heat exchanger. By installing a first switching guide having a movable door that moves, The air sent from the replacement box passes through the cooling heat exchanger and / or the heating heat exchanger,
Moreover, the 2nd switching guide is installed in the said ventilation path, The ventilation path formed in the air discharge surface side of the heat exchanger for cooling is made into a cold wind ventilation path, and the air discharge surface of the said heat exchanger for heating The air passage formed on the side is a hot air air passage, and the second switching guide is provided at a position where the cold air air passage and the hot air air passage can be partitioned,
Furthermore, the second switching guide is constituted by an automotive air conditioner unit comprising a movable door and a rotary shaft rotatably provided on the movable door .
[0011]
According to the first aspect of the present invention, the cooling heat exchanger and the heating heat exchanger are arranged such that an angle formed between the air introduction surfaces of each other forms a V-shape of 60 ° to 120 °, and A first switching guide having a movable door that rotates around the V-shaped root portion is installed between the cooling heat exchanger and the heating heat exchanger, thereby supplying the air from the inside / outside air switching box. The cooled air is allowed to pass through the cooling heat exchanger and / or the heating heat exchanger, and the second switching guide is installed in the air passage, so that the cooling heat exchanger and the heating heat exchange are provided. Since the air conditioner unit can be installed on a flat surface and the air conditioner unit can be made compact, the other space in the instrument panel can be increased and the inside of the instrument panel can be used effectively.
In particular, in the present invention, the movable door of the first switching guide is rotatable around the V-shaped root portion, and the warm air and the cold air are mixed by positioning continuously, so that the appropriate indoor temperature Can be set.
[0012]
Further, the air sent from the inside / outside air switching box is sent only to the cooling heat exchanger by the action of the first switching guide, or is sent only to the heating heat exchanger, and further the cooling heat exchanger and the heating Since it can be passed through the heating heat exchanger without passing through the cooling heat exchanger once by sending it to both the heat exchanger for heating, it can be heated up and consumed without using extra heat energy Fuel can also be reduced.
Further, the air passage formed on the air discharge surface side of the cooling heat exchanger is a cold air air passage, and the air passage formed on the air discharge surface side of the heating heat exchanger is the hot air air passage. The second switching guide is provided at a position where the cold air blowing path and the hot air blowing path can be partitioned, and the second switching guide is further provided with a movable door and a rotation provided rotatably on the movable door. Since it comprises a shaft, the cooling efficiency and heating efficiency are further increased.
[0013]
According to a second aspect of the present invention, the first switching guide covers the entire air introduction surface of the heating heat exchanger during maximum cooling, and the entire air introduction surface of the cooling exchanger during maximum heating. It is in the air conditioner unit for automobiles.
[0014]
According to the second aspect of the present invention, the first guide closes the entire air introduction surface of the heating heat exchanger during maximum cooling, and the entire air introduction surface of the cooling exchanger during maximum heating. The air conditioner for automobiles is designed to block the air introduction surface of the heat exchanger for heating during maximum cooling, and the air introduction surface of the cooling heat exchanger is reliably blocked during maximum heating. And heating efficiency becomes good.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described. FIG. 3 is a schematic perspective view of an automotive air conditioner unit according to the present invention, FIG. 2 is a sectional view of a central portion of an instrument panel according to the automotive air conditioner unit of the present invention, and FIG. 1 is a sectional view taken along line AA in FIG. It is. The automotive air conditioner unit of the present invention will be described with reference to FIGS. The air conditioner unit 1 is installed at the center of the instrument panel 35 in the vehicle width direction and between the vehicle body floor 43. In the present embodiment, the blower 23 is arranged downstream of the heating heat exchanger and the cooling heat exchanger and sucks air, but upstream of the heating heat exchanger and the cooling heat exchanger. You may arrange | position and give the effect | action which ventilates.
[0018]
In the air conditioner unit 1, the cooling heat exchanger 3 and the heating heat exchanger 5 have a V-shape with an angle θ formed in the longitudinal direction of the air introduction surface 9 and the air introduction surface 13 between 60 ° and 120 °. Set up to form. It is a perspective view which shows the state which attached the air conditioner unit 1 to the front surface of the vehicle interior, and FIG. 1 is the sectional view on the AA line of FIG.
[0019]
An angle θ between the cooling heat exchanger 3 and the heating heat exchanger 5 in the longitudinal direction of the air introduction surface 9 and the air introduction surface 13 is set to 60 ° to 120 °. The angle is preferably set to 70 ° to 100 °, more preferably about 90 °. Here, if the angle is smaller than 60 °, there is a problem that the air resistance is increased, and if it is larger than 120 °, there is a problem that the air conditioner unit is not compact.
[0020]
An inside / outside air switching box 47 is disposed above the cooling heat exchanger 3 and the heating heat exchanger 5, and an inside / outside air switching door 33 is installed in the inside / outside air switching box 47, so that the inside air and the outside air are separated. Selective introduction is possible. The first switching guide 6 is installed on the air introduction surfaces 9 and 13 side of the cooling heat exchanger 3 and the heating heat exchanger 5. The first switching guide 6 includes a movable door 7 and a rotary shaft 8 that is fixed to the movable door 7 and is rotatable about a substantially middle point between the heat exchanger 5 for heating and the heat exchanger 3 for cooling. The first switching guide 6 covers the entire air introduction surface 13 of the heating heat exchanger 5 during maximum cooling, and the air introduction surface 9 of the cooling heat exchanger 3 during maximum heating. Install so as to cover the entire surface. Further, when setting an intermediate room temperature between maximum cooling and maximum heating, the first switching guide 6 is controlled to stop at an intermediate position between the cooling heat exchanger 3 and the heating heat exchanger 5. To do.
[0021]
And the air which passed the said heat exchanger 3 for cooling and / or the heat exchanger 5 for heating to the air discharge | emission surface 11 and 15 side of the said heat exchanger 3 for cooling and the heat exchanger 5 for heating to the vehicle interior An air passage for blowing air is installed, the air passage on the cooling heat exchanger 3 side is the cold air air passage 17, and the air passage on the heating heat exchanger side is the hot air air passage 19.
[0022]
Further, the cold air blowing path 17 and the hot air blowing path 19 are partitioned, and only the cold air passing through the cold air blowing path 17 or only the warm air passing through the hot air blowing path 19 is blown into the automobile room. In order to mix the air that has passed through the air flow path and blow it into the automobile compartment, the heat exchanger 5 for heating and the heat exchanger 3 for cooling are substantially in the middle of the cold air blow path 17 and the hot air blow path 19. A second switching guide 21 is provided so as to be rotatable around a point.
[0023]
The second switching guide 21 includes a movable door 24 and a rotary shaft 22 fixed to the movable door 24 and provided to be rotatable about a substantially middle point between the heating heat exchanger 5 and the cooling heat exchanger 3. It consists of And the said 2nd switching guide 21 is used in order to adjust the mixing ratio of cold / hot air by the air mix system which adjusts the mixing ratio of cold / hot air as a temperature control system of the air conditioning employ | adopted by this Embodiment.
[0024]
The mixing ratio of the cold / hot air is adjusted by the opening degree of the movable door 24 of the second switching guide 21, and the opening degree is controlled by a microcomputer (not shown) connected to the rotating shaft 22 of the second switching guide 21.
[0025]
Instead of the second switching guide 21, a hot water control valve for controlling the flow rate of hot water to the heating heat exchanger 5 is provided, and the amount of air heated by the heating heat exchanger 5 is adjusted by this hot water control valve. Of course, the temperature of the air blown into the passenger compartment may be controlled.
[0026]
The inside / outside air switching box 47 is located above the air conditioner unit 1 and functions to switch and introduce vehicle interior air and vehicle exterior air. The inside / outside air switching box 47 has an outside air introduction port and an inside air introduction port (not shown). Inside / outside air switching box 47 is provided with inside / outside air switching door 33 that opens and closes both inlets, and this inside / outside air switching door 33 closes the opening of either the outside air inlet or the inside air inlet. Thus, the introduction of inside air and the introduction of outside air are switched.
[0027]
The blowing mode switching unit 30 is for switching the blowing mode into the passenger compartment, and a center face blowing air passage communicating with a center face (upper) outlet 32 for blowing air toward the passenger's head in the passenger compartment. 36 and a defroster blowout air passage 38 communicating with the defroster blowout port 34 for blowing air toward the window glass 37, and these blowout air passages 36, 38 are switched by a blowout port switching door 31. is there.
[0028]
Next, the operation of this embodiment in the above configuration will be described. In FIG. 2, the air flowing from the inside / outside air switching box 47 tends to flow to either or both of the cooling heat exchanger 3 and the heating heat exchanger 5 by the action of the blower 23. The direction in which the air flows is controlled by the first switching guide 6. Next, the subsequent air flow will be described separately for maximum cooling, maximum heating, or intermediate time.
[0029]
First, the maximum cooling will be described. As shown in FIG. 1, the movable door 7 of the first switching guide 6 completely closes the air introduction surface 13 of the heating heat exchanger 5 by the operation of a microcomputer (not shown) (FIG. 1). Solid line). Therefore, air passes only through the cooling heat exchange device 3. The air is introduced into the cooling heat exchanger 3 from the air introduction surface 9 of the cooling heat exchanger 3 and is cooled by the action of the cooling heat exchanger 3. And the cooled air is discharged | emitted from the air discharge surface 11 of the heat exchanger 3 for cooling, and is sent to the cold wind ventilation path 17 next. At this time, the movable door of the second switching guide 21 is maximally opened to the hot air blowing path 19 side by the action of a microcomputer (not shown), and the hot air blowing path 19 is closed so that all the air in the cold wind blowing path 17 is discharged to the air outlet 26. All of the air that passes through and flows into the vehicle interior becomes air that has passed through the cooling heat exchanger 3, and the vehicle interior is maximally cooled.
[0030]
Next, the maximum heating time will be described. As shown in FIG. 1, the movable door 7 of the first switching guide 6 completely closes the air introduction surface 9 of the cooling heat exchanger 5 by the operation of a microcomputer (not shown) (FIG. 1 dotted line). Therefore, air passes only through the heat exchanger 5 for heating. Then, the air is introduced into the heating heat exchanger 5 from the air introduction surface 13 of the heating heat exchanger 5 and heated by the action of the heating heat exchanger 5. At this time, the movable door 24 of the second switching guide 21 opens to the cold air blowing path 17 side to the maximum extent by the action of a microcomputer (not shown), and closes the cold air blowing path 17 so that all the air in the hot air blowing path 19 passes through the air outlet 26. All the air that passes through and flows into the vehicle interior becomes air that has passed through the heat exchanger 5 for hot air, and the vehicle interior is heated up to the maximum.
[0031]
Finally, when the temperature in the passenger compartment is set to an intermediate room temperature between maximum cooling and maximum heating, the movable door 7 of the first switching guide 6 is heated with the cooling heat exchanger 3 by the operation of a microcomputer (not shown). The heat exchanger 5 stops at an intermediate position. Therefore, the air passes through both the cooling heat exchanger 3 and the heating heat exchanger 5. The passed air is sent to the cold air blowing path 17 and the hot air blowing path 19. At this time, the position of the movable door 24 of the second switching guide 21 between the cold air blowing path 17 and the hot air blowing path 19 is controlled according to the set temperature of the passenger compartment temperature by the action of the microcomputer. The vehicle interior temperature is controlled by determining the amount of cold air and hot air to be mixed depending on the position of the movable door 24.
[0032]
【The invention's effect】
As described above, according to the present invention, in the first aspect, the cooling heat exchanger and the heating heat exchanger form a V-shape in which an angle formed between the air introduction surfaces is 60 ° to 120 °. arranged further between the heating heat exchanger and the cooling heat exchanger, by placing the first switching guide having a movable door which rotates about a root portion of the V-shape, said ambient air The air sent from the switching box passes through the cooling heat exchanger and / or the heating heat exchanger, and the second switching guide is installed in the air passage, so that the cooling heat exchanger and The heat exchanger for heating can be installed on a flat surface in the air conditioner unit, and the air conditioner unit can be made compact, so that the other space in the instrument panel can be increased and the inside of the instrument panel can be used effectively There.
[0033]
According to a second aspect of the present invention, the first switching guide is provided to be movable around a movable door and a substantially intermediate point between the heating heat exchanger and the cooling heat exchanger fixed to the movable door. The first switching guide covers the entire air introduction surface of the heating heat exchanger during maximum cooling, and the entire air introduction surface of the cooling exchanger during maximum heating. The air conditioner for automobiles is designed to block the air introduction surface of the heat exchanger for heating during maximum cooling, and the air introduction surface of the cooling heat exchanger is reliably blocked during maximum heating. And heating efficiency becomes good. Further, the movable door is rotatable about the rotation axis, and by positioning it steplessly, there is an effect that hot air and cold air are mixed and an appropriate room temperature can be set.
[0034]
According to a third aspect of the present invention, the blower passage formed on the air discharge surface side of the cooling heat exchanger is a cold air blower passage, and the blower formed on the air discharge surface side of the heating heat exchanger. The path is a hot air blowing path, the second switching guide is provided at a position where the cold air blowing path and the warm air blowing path can be partitioned, and the second switching guide is fixed to the movable door and the movable door. Since the vehicle air conditioner unit is composed of a rotating shaft that is rotatably provided around the substantially center point of the heating heat exchanger and the cooling heat exchanger, the cooling efficiency and the heating efficiency are further improved. It has the effect of rising.
[Brief description of the drawings]
FIG. 1 shows an example of an embodiment of the present invention, and is a cross-sectional view taken along line AA in FIG.
FIG. 2 is a cross-sectional view of a central portion of an instrument panel according to an automotive air conditioner unit of the present invention.
FIG. 3 is a schematic perspective view of an automotive air conditioner unit according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Automobile air conditioner unit 3 Cooling heat exchanger 5 Heating heat exchanger 6 1st switching guide 7 Movable door 8 Rotating shaft 9 Air introduction surface 11 Air discharge surface 13 Air introduction surface 15 Air discharge surface 17 Cold-air ventilation path 19 Temperature Air blow path 21 Second switching guide 22 Rotating shaft 23 Blower 24 Movable door 25 Car body panel 26 Air exhaust port 27 Cooler pipe 29 Heater pipe 30 Blowout mode switching unit 31 Blowout port switching door 32 Center face blowout port 33 Inside / outside air switching door 34 Defroster outlet 35 Instrument panel 36 Center face outlet air passage 37 Window glass 38 Defroster outlet air passage 39 Cowl box 41 Hood 43 Body floor 45 Cooler drain 47 Inside / outside air switching box

Claims (2)

An internal / external air switching box for switching between internal and external air, an air introduction surface and an air discharge surface, a cooling heat exchanger for cooling the air sent from the internal / external air switching box, an air introduction surface and air A heating heat exchanger having a discharge surface for heating the air sent from the inside / outside air switching box, and air that has passed through the cooling heat exchanger and / or the heating heat exchanger is blown into the automobile interior An air conditioner unit for an automobile including an air passage for performing a V-shape in which an angle formed between the air introduction surfaces of the cooling heat exchanger and the heating heat exchanger is 60 ° to 120 ° In addition, a first switching guide having a movable door that rotates around the V-shaped root portion is installed between the cooling heat exchanger and the heating heat exchanger. The air sent from the inside / outside air switching box is converted into the cooling heat exchanger by And / or through a heat exchanger for heating,
Moreover, the 2nd switching guide is installed in the said ventilation path, The ventilation path formed in the air discharge surface side of the heat exchanger for cooling is made into a cold wind ventilation path, and the air discharge surface of the said heat exchanger for heating The air passage formed on the side is a hot air air passage, and the second switching guide is provided at a position where the cold air air passage and the hot air air passage can be partitioned,
Furthermore, the 2nd switching guide is comprised by the movable door and the rotating shaft rotatably provided in this movable door, The air conditioner unit for motor vehicles characterized by the above-mentioned.   The first switching guide is configured to block the entire air introduction surface of the heat exchanger for heating during maximum cooling, and to block the entire surface of the air introduction surface of the cooling exchanger during maximum heating. The described automotive air conditioner unit.

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