JP4186139B2 - Air conditioner unit for automotive air conditioner - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air conditioner unit for an automotive air conditioner.
[0002]
[Prior art]
As an air conditioner unit of a conventional automobile air conditioner, one described in Japanese Utility Model Laid-Open No. 62-177509 is known. FIG. 3 is a cross-sectional view of the air conditioning unit of the automotive air conditioning system. In the figure, solid arrows indicate the flow of cold air, broken arrows indicate the flow of hot air, and two-dot chain arrows indicate the flow of air in which the cold air and hot air are mixed.
[0003]
A heater core 102 is accommodated in the unit case 101 of the air conditioner unit, and a rotatable air mix door 103 is provided upstream of the heater core 102. The heater core 102 is located in the lower part of the unit case 101, a cool air passage 104 through which air bypasses the heater core 102 is formed in the upper part of the unit case 101, and the air that has passed through the heater core 102 is formed in the lower part of the unit case 101. A hot air passage 105 through which the air passes is formed. In the middle of the cold air passage 104, a movable guide 120 and a plurality of fixed guides 121 are provided.
[0004]
Further, the unit case 101 is provided with a differential outlet 106, a vent outlet 107, a foot outlet 108, and a connection port 109 connected to a cooler unit (not shown). The differential outlet 106 and the vent outlet 107 are located above the unit case 101, and the foot outlet 108 is located below the unit case 101. The differential outlet 106, the vent outlet 107 and the foot outlet 108 are opened and closed by opening and closing doors 111 and 112.
[0005]
The unit case 101 is obtained by integrally fitting a left case constituent part and a right case constituent part that are resin-molded with a mold.
[0006]
In the foot mode or the differential foot mode, as shown in FIG. 3, the air mix door 103 and one fixed guide 121 are arranged in a substantially straight line, so that the cool air in the cool air passage 104 is generated by the movable guide 120 and the fixed guide 121. It is guided obliquely downward and hits the hot air downstream of the hot air passage 105. In this way, cold air and hot air are sufficiently mixed.
[0007]
Therefore, in the foot mode, the differential bleed temperature of the differential outlet 106 does not become extremely lower than the outlet temperature of the foot outlet 108. Further, in the differential foot mode, the difference between the blowing temperature of the foot blowing port 108 and the blowing temperature of the differential blowing port 106 is small.
[0008]
[Problems to be solved by the invention]
However, the air conditioner unit of the above-described automobile air conditioner has the following problems.
[0009]
When the unit case 101 is resin-molded, the mold partially becomes hot, so that it is difficult to cool the mold well, the mold is easily damaged, and the fixing guide 121 is broken during the mold release. there were.
[0010]
Further, in order to reduce the air resistance, the fixed guide 121 must be formed as thin as possible. However, as described above, since the cooling of the mold is difficult to be performed well, the fixed guide 121 is likely to be warped, and the unit case is assembled during the case assembly. It may be difficult to fit the left case component constituting the left half of the 101 and the right case component constituting the right half of the case 101.
[0011]
Furthermore, there is a problem that wind noise is generated by the fixed guide 121.
[0012]
The present invention has been made in view of such circumstances, and the problem is that, without using a fixed guide, in the foot mode or the differential foot mode, the hot air is guided to the differential outlet and the outlet of the foot outlet is blown out. An object of the present invention is to provide an air conditioner unit for an automotive air conditioner that can reduce the difference between the temperature and the outlet temperature of a differential outlet.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an air conditioner unit for an automotive air conditioner according to claim 1 is located above a hot air passage through which the air that has passed through a heat exchanger for heating passes, A cold air passage through which air bypassing the heat exchanger for heating passes, a vent outlet, a differential outlet and a foot outlet provided in the unit case, a plurality of open / close doors for opening and closing each outlet, and the cold air passage An air mix door that adjusts the ratio of the air passing through the heating heat exchanger and the air passing through the heating heat exchanger, and an air mix that is located on the downstream side of the hot air passage and the cold air passage and mixes the hot air and the cold air in air conditioning unit for a motor-vehicle air-conditioning apparatus provided with a chamber, the interior of the air mixing chamber, most wind full cold during said hot air passage is closed at the top of the unit case With cold air main basin is positioned to be higher, in the form most wind increases warm air main basin full hot during said cold air passage to the lower is closed the unit case is located, it is divided into two air layers of different temperatures The open / close door that opens and closes the differential outlet of the plurality of open / close doors is an asymmetric butterfly door composed of a long side portion and a short side portion, and a leading end side of the long side portion is the hot air main wherein while always positioned basin side distal end side of the short side portion is always positioned in the cold air main basin side door for opening and closing the def outlet is the opening is minimized by the foot mode, A gap is formed in each of the short side portion and the long side portion, and the gap formed in the long side portion is larger than the gap formed in the short side portion. The time Tomodo by its opening is larger than the foot mode, characterized in that the gap formed by the longitudinal side portion is larger than the foot mode.
[0014]
As described above, the open / close door that opens and closes the differential outlet is an asymmetric butterfly door, the long side portion of this butterfly door is located on the hot air main basin side, and the short side portion thereof is located on the cold air main basin side Therefore, during foot mode or differential foot mode, the air in the warm air main flow area is guided to the differential outlet by the long side of the butterfly door, and the outlet temperature of the differential outlet differs from the outlet temperature of the foot outlet. Does not drop extremely.
[0015]
An air conditioner unit for an automotive air conditioner according to a second aspect of the present invention is the air conditioner unit for an automotive air conditioner according to the first aspect of the invention, wherein the open / close door that opens and closes the foot outlet is among the plurality of open / close doors . an asymmetric butterfly doors consisting of a longitudinal side portion and the short side portion, wherein the distal end side the cold air main of the short side portion with the distal end side of the longitudinal side portion is always positioned in the hot air main basin side The open / close door, which is always located on the basin side and opens and closes the foot outlet, has the maximum opening in the foot mode and the maximum gap formed in the long side portion. However, a gap is formed, and the opening in the differential foot mode is smaller than that in the foot mode, so that the gap formed in the longitudinal portion is smaller than in the foot mode. And wherein the Kunar.
[0016]
As described above, the open / close door that opens and closes the foot outlet is an asymmetrical butterfly door. Therefore, in the foot mode or the differential foot mode, the air in the hot air main flow area is guided to the differential air outlet by the longitudinal side portion of the butterfly door of the differential air outlet, and the air in the cold air main flow area is Since the butterfly door is guided to the foot outlet by the short side portion of the butterfly door, the outlet temperature of the foot outlet does not become extremely high with respect to the outlet temperature of the differential outlet.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
FIG. 1A is a broken sectional view showing an air conditioner unit of an automotive air conditioner according to an embodiment of the present invention, and FIG. 1B is a sectional view taken along line I-I in FIG. In FIG. 1A, solid arrows indicate the flow of cold air, and broken arrows indicate the flow of hot air.
[0019]
A heater case 2 and an air mix door 3 are accommodated in the unit case 1 of the air conditioner unit. The heater core 2 is a heat exchanger that heats air from an evaporator (not shown) of the cooler unit. The air mix door 3 is a rotary door and is located upstream of the heater core 2. The full cold position of the air mix door 3 (the position at which the inflow of air into the heater core 2 is completely blocked) is indicated by the solid line in FIG. 1A, and the full hot position of the air mix door 3 (the air has flowed into the unit case 1). The position at which all of the air is sent to the heater core 2 is indicated by a two-dot chain line in FIG. The air mix door 3 can be stopped between a full cold position and a full hot position, and the ratio between the air passing through the heater core 2 and the air not passing through is determined by the stop position.
[0020]
The heater core 2 is located in the lower part of the unit case 1, a cool air passage 4 through which air bypasses the heater core 2 is formed in the upper part of the unit case 1, and the air that has passed through the heater core 2 is formed in the lower part of the unit case 1. Is formed. An air mix chamber 30 is formed on the downstream side of both passages 4 and 5.
[0021]
The interior of the air mix chamber 30 is divided in the vertical direction of the unit case 1 into a cold wind main flow region C where the wind speed is highest when full cold and a hot air main flow region H where the wind speed is highest when full hot. The cold air main flow region C located in the upper part in the unit case 1 and the hot air main flow region H located in the lower part in the unit case 1 are two air layers having different temperatures.
[0022]
The unit case 1 is provided with a differential outlet 6, a vent outlet 7, a foot outlet 8, and a connection port 9 connected to the cooler unit. The differential outlet 6, the vent outlet 7 and the foot outlet 8 are opened and closed by butterfly doors (open / close doors) 10, 11 and 12, respectively. The butterfly door 11 for opening and closing the vent outlet 7 is a symmetric butterfly door, and the butterfly doors 10 and 12 for opening and closing the differential outlet 10 and the foot outlet 8 are asymmetric butterfly doors. The long side portions 10a and 12a of the butterfly doors 10 and 12 are located on the hot air main flow region H side, and the short side portions 10b and 12b are located on the cold air main flow region C side.
[0023]
Next, the positions of the butterfly doors 10 to 12 and the air flow in the foot mode and the differential foot mode will be described with reference to FIG. FIG. 2A shows the position of the butterfly doors 10-12 and the air flow in the foot mode, and FIG. 2B shows the position of the butterfly doors 10-12 and the air flow in the differential foot mode. FIG.
[0024]
Air sucked from a blower unit (not shown) passes through the cooler unit and flows into the unit case 1 from the connection port 9. The air flowing into the unit case 1 is divided into two by the air mix door 3, a part of the air passes through the heater core 2 and proceeds to the hot air passage 5, and the remaining air bypasses the heater core 2 and cool air passage 4. Proceed to
[0025]
The air that has passed through the hot air passage 5 and the air that has passed through the cold air passage 4 are mixed in the air mix chamber 30. However, since the cold air passage 4 is in the upper part in the unit case 1 and the hot air passage 5 is in the lower part in the unit case 1, the cold air main flow region C having a low temperature is formed on the upper side in the air mix chamber 30 as described above. A hot air main flow area H having a high temperature is formed on the lower side.
[0026]
In the foot mode, as shown in FIG. 2A, the opening degree of the butterfly door 12 is substantially maximized, and the foot outlet 8 is substantially fully opened. Further, the opening degree of the butterfly door 11 is minimized, the vent outlet 7 is fully closed, the opening degree of the butterfly door 10 is reduced, and the differential outlet 6 is slightly opened.
[0027]
Warm air in the hot air main flow region H and cold air in the cold air main flow region C are blown out from the foot blowing port 8 and the differential blowing port 6. However, since the opening degree of the butterfly door 10 is small, the amount of air blown out from the differential outlet 6 is significantly smaller than the amount of air blown out from the foot outlet 8. However, the long side portion 10a of the butterfly door 10 is located in the hot air main flow region H, the short side portion 10b is located in the cold air main flow region C, and is longer than the gap formed by the short side portion 10b. Since the gap formed by 10a is larger, more warm air is blown out from the def outlet 6 than cold air. Further, since the short side portion 12b of the butterfly door 12 is located in the cold wind main flow region C, cold air in the cold wind main flow region C is blown out from the gap formed by the short side portion 12b.
Therefore, the blowing temperature (diff bleed temperature) of the differential outlet 6 does not become extremely lower than the blowing temperature of the foot outlet 8.
[0029]
On the other hand, in the differential foot mode, the foot outlet 8 and the differential outlet 6 are opened as shown in FIG. The opening degree of the butterfly door 11 is minimized, and the vent outlet 7 is fully closed.
[0030]
Warm air in the hot air main flow region H and cold air in the cold air main flow region C are blown out from the foot blowing port 8 and the differential blowing port 6. The amount of warm air blown from the differential outlet 6 is larger than that in the foot mode because the opening degree of the butterfly door 10 is larger than that in the foot mode. Conversely, the amount of warm air blown out from the foot outlet 8 is smaller than that in the foot mode because the opening degree of the butterfly door 12 is smaller than that in the foot mode.
[0031]
Therefore, the difference between the blowing temperature of the foot blowing port 8 and the blowing temperature of the differential blowing port 6 becomes small.
[0032]
As described above, according to this embodiment, without using the fixed guide, the air in the hot air main flow area H is transferred to the differential outlet 6 by the long side portion 10a of the butterfly door 10 in the foot mode or the differential foot mode. In addition to being guided, the air in the cold wind main basin C is guided to the foot outlet 8 by the short side portion 12b of the butterfly door 12 of the foot outlet 8, so that the outlet temperature of the differential outlet 6 and the temperature of the foot outlet 8 The difference with the blowing temperature can be reduced.
[0033]
Since no fixed guide is used, the following various advantages arise. (1) When the unit case 1 is molded, since the mold does not partially become hot, the mold is cooled well, the mold is not easily damaged, and the fixed guide is torn off during the mold release. Nor. (2) When the case is assembled, it is not difficult to fit the left case constituting part constituting the left half of the unit case 1 and the right case constituting part constituting the right half of the case 1. (3) Wind noise is reduced. (4) Since a dedicated movable guide as in the conventional example is not employed, the manufacturing cost can be reduced, and the volume of the unit case 1 needs to be increased in order to secure a space for rotating the movable guide. Nor.
[0034]
In the above-described embodiment, the foot outlet 8 is formed on the side surface of the unit case 1 and the asymmetrical butterfly door 12 is used as an opening / closing door for opening and closing the foot outlet 8. A symmetrical butterfly door or a simple rotary opening / closing door similar to the conventional example may be used as the opening / closing door formed on the bottom surface and opening / closing the differential outlet.
[0035]
【The invention's effect】
As described above, according to the air conditioner unit for an automotive air conditioner according to the first aspect of the present invention, the open / close door that opens and closes the differential outlet without using a fixed guide has a hot air main end at the front end. Located in the basin, the tip of the short side part is located in the cold wind main stream area, the air in the hot air main stream area is guided to the differential outlet by the long side part, and in the foot mode, the short side part Since the gap formed by the long side part is larger than the gap formed by the warm air, the warm air blows more than the cold air from the differential outlet, and in the differential foot mode, the opening degree is the foot mode. amount that is larger than time, the amount of warm air blown out from the defroster air outlet is larger than the foot mode, the outlet air temperature of the def outlet in the foot mode or DEF foot mode and the foot It is possible to reduce the difference between the out port of the air temperature.
[0036]
According to the air conditioner unit for an automobile air conditioner according to claim 2, the opening / closing door that opens and closes the foot outlet without using a fixed guide has the tip of the longitudinal side portion located in the hot air main flow area, The tip of the short side part is located in the cold wind main flow area, the air in the hot air main flow area is guided to the foot outlet by the long side part, and the air in the cold wind main stream area is guided to the foot outlet by the short side part At the time of foot mode, a gap is also formed on the short side part, and not only warm air but also cold air is blown out from the foot outlet, and in differential foot mode, the opening degree is higher than in foot mode small amount, since the amount of hot air that is blown out from the foot outlet is smaller than the foot mode, the outlet air temperature of the foot mode or def foot mode even def outlet and the foot blow-out It is possible to reduce the difference between the outlet air temperature of the mouth.
[Brief description of the drawings]
FIG. 1 (a) is a broken sectional view showing an air conditioner unit of an automotive air conditioner according to one embodiment of the present invention, and FIG. FIG.
2A is a diagram showing the position of the butterfly door and the air flow in the foot mode, and FIG. 2B is a diagram showing the position of the butterfly door and the air flow in the differential foot mode. It is.
FIG. 3 is a cross-sectional view of an air conditioner unit of a conventional automobile air conditioner.
[Explanation of symbols]
1 Unit Case 2 Heater Core 3 Air Mix Door 4 Cold Air Passage 5 Hot Air Passage 7 Vent Outlet 6 Differential Outlet 8 Foot Outlet 10, 11, 12 Butterfly Door 10a, 12a Long Side Part 10b, 12b Short Side Part 30 Air Mix chamber C Cold air main basin H Hot air main basin

Claims (2)

A hot air passage through which the air that has passed through the heat exchanger for heating passes, a cold air passage that is located above the hot air passage and through which the air bypassing the heat exchanger for heating passes, and a vent outlet provided in the unit case A plurality of opening / closing doors for opening and closing each of the outlets, an air mix door for adjusting a ratio of air passing through the cold air passage and air passing through the heat exchanger for heating; In the air conditioner unit for an automotive air conditioner, which is located on the downstream side of the hot air passage and the cold air passage, and includes an air mix chamber for mixing hot air and cold air,
The inside of the air mix chamber is located in the upper part of the unit case where a cold wind main flow region where the wind speed is highest during full cold when the hot air passage is closed is located, and in the lower part of the unit case, the cold air passage is closed. It is divided into two air layers with different temperatures in the form of a hot air mainstream where the wind speed is highest when hot ,
The open / close door that opens and closes the differential outlet of the plurality of open / close doors is an asymmetrical butterfly door composed of a long side portion and a short side portion, and a leading end side of the long side portion is the hot air main flow area Always located on the side and the tip side of the short side part is always located on the cold wind mainstream side,
The opening / closing door that opens and closes the differential outlet has a minimum opening in the foot mode, but a gap is formed between the short side portion and the long side portion, and is formed at the short side portion. The gap formed in the longitudinal side portion is larger than the gap in the differential foot mode, and the opening is larger in the differential foot mode than in the foot mode, thereby forming the longitudinal side portion. An air conditioner unit for an automotive air conditioner, wherein the gap is larger than that in the foot mode . The open / close door that opens and closes the foot outlet of the plurality of open / close doors is an asymmetric butterfly door composed of a long side portion and a short side portion, and the leading end side of the long side portion is the hot air main flow area the distal end side of the shorter side portion while always located on the side is always located in the cold air main basin side,
The opening / closing door that opens and closes the foot outlet has a maximum opening in the foot mode, and the gap formed in the long side portion is also maximum, but the gap is also formed in the short side portion. In addition, when the differential foot mode is used, the opening is smaller than that in the foot mode, so that the gap formed in the longitudinal portion is smaller than that in the foot mode . Air conditioner unit for air conditioner.

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