JP2000190722A - Air conditioner unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner unit enabling proper temperature adjusting without increasing size of unit case, decreasing blow amount, or increasing noise. SOLUTION: An air conditioner unit is provided with a movable guide 21 guiding a part of cold air in the down stream of a cold air passage 11 to the down stream of a warm air passage 14 during air mixing setting, and guiding the cold air in a passage direction C of the cold air passage 11 during full cold setting. The warm air and the cold air are mixed properly during the air mixing setting, and, for example, the difference between the blowing out temperature at a vent blowingout opening 6 and the blowingout temperature at a foot blowingout opening 8 decreases in the bi-level mode. The ventilation resistance does not increase during the full cold setting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an air conditioner unit for a motor vehicle.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional air conditioner unit for an automobile (Japanese Patent Laid-Open No. 9-95120).

FIG. 4 is a conceptual diagram showing the internal structure of a conventional vertical air conditioner unit.

In an air conditioner unit case 104 of the air conditioner unit, an evaporator 101, an air mix door 103, and a heater core 10 are arranged in order from the upstream side to the downstream side.
2 are arranged.

The air from the fan unit (not shown) is supplied to the air conditioner unit case 104 in the unit case 10.
4, an air inlet 116 for introducing air into the unit case 104, a vent outlet 106, a differential outlet 107, and a foot outlet 108 for blowing air from the unit case 104 toward the vehicle compartment are provided. ing. The evaporator 101 is provided inside the air conditioner unit case 104.
A cold air passage 111 through which the air passing through the heater core 102 flows, a hot air passage 114 through which the air passing through the heater core 102 flows, and an air mixing chamber 115 for mixing air downstream of the cold air passage 111 with air downstream of the hot air passage. Are provided respectively.

When the air mix door 103 is at the position indicated by the solid line in FIG. 4, the air that has passed through the evaporator 401 does not pass through the heater core 102, but flows from the cool air passage 111 through the air mix chamber 115 to each of the blowout openings 106, 1.
Go to 07 side. When the opening / closing door 109 and the opening / closing door 110 are at the positions indicated by the solid lines in FIG. 4, cool air is blown out from the vent blowing opening 106.

On the other hand, when the air mix door 103 is at the position indicated by the two-dot chain line in FIG. 4, the cool air passage 111 is shut off, and the air that has passed through the evaporator 102 is sent to the heater core 102. The air that has passed through the heater core 102 travels through the hot air passage 114 along the fixed guide 120 and reaches the air mix chamber 115. The air that has passed through the air mix chamber 115 is guided by the fixed guide 120 and advances to the vent opening 106 and the foot opening 108. The air is warmed when passing through the heater core 102, and hot air is blown out from the selected blowing opening. The air that has passed through the heater core 102 reaches a differential blow opening 107 and a foot blow opening 108 following a long path that curves greatly.

When the air mix door 103 is located substantially halfway between the position indicated by the solid line and the position indicated by the two-dot chain line in FIG. 4, the air passing through the evaporator 102 advances to the cool air passage 111 and at the same time to the heater core 102. Heater core 10
2 passes through the hot air passage 114, is mixed with the air in the cold air passage 111 in the air mixing chamber 115,
Proceed to each outlet opening side.

[0009]

However, there has been a problem that the difference between the outlet temperature of the vent outlet opening 106 and the outlet temperature of the foot outlet opening 108 is too large. In order to prevent this, conventionally, a door for temperature adjustment is provided in the unit case 108, and a guide for temperature adjustment is enlarged.

[0010] However, these methods have problems that the unit case becomes large, the airflow resistance at the time of full cold increases, the amount of air blows decreases, and noise increases.

[0011] The present invention has been made in view of such circumstances, and an object thereof is to perform appropriate temperature adjustment without inviting an increase in the size of the unit case, a decrease in the amount of blown air, and an increase in noise. Is to provide an air conditioner unit.

[0012]

According to a first aspect of the present invention, there is provided an air conditioner unit for heating an air passing through a cooling heat exchanger, and a heating heat exchanger for heating the air. An air conditioner unit case accommodating the heat exchanger, a hot air passage formed in the air conditioner unit case, and passing air passing through the heat exchanger for heating, and a hot air passage formed in the air conditioner unit case; A cool air passage through which air bypassing the heat exchanger passes, an air mix chamber where the air downstream of the cool air passage and the air downstream of the warm air passage merge, and provided in the air conditioner unit case, passing through the cold air passage In an air conditioner unit having an air mixing door for adjusting a ratio of air to air passing through the heating heat exchanger, the air mixing unit is connected to an opening and closing operation of the air mixing door. In addition, an arch-shaped movable guide that guides a part of the cool air downstream of the cool air passage to the downstream of the hot air passage at the time of air mixing, and guides the cool air along the passage direction of the cool air passage at the time of full cold. It is characterized by.

As described above, the air conditioner unit according to the present invention guides a part of the cool air downstream of the cool air passage to the downstream of the hot air passage during the air mixing, and cools the cool air along the cool air passage at the time of full cold. Since a movable guide having an arch shape is provided for guiding, for example, the difference between the outlet temperature of the vent outlet and the outlet temperature of the foot outlet in the bi-level mode becomes smaller, but the ventilation resistance does not increase at the time of full cold. .

An air conditioner unit according to a second aspect of the present invention is the air conditioner unit according to the first aspect,
The air mix door is foldable into two,
At the time of full hot, the air mix door is folded and the cold air passage is closed, the entire air inflow surface of the heating heat exchanger is opened, and at the time of full cold, the air mix door is opened to open the cold air passage, The entire air inflow surface of the heating heat exchanger is closed, and the air mixing door includes first and second door members, and one end of the first door member is connected to the heating heat exchanger. The guide groove is rotatably mounted at a predetermined position at the end of the cold air passage side, is provided near the air inflow surface of the heating heat exchanger, and is parallel to the air inflow surface of the heating heat exchanger. One end of the second door member is slidably engaged, the other end of the first door member is connected to the other end of the second door member by a hinge, and the movable guide is Characterized by being fixed to the first door member. .

As described above, since the air mix door can be folded in two, the opening area of the air inflow surface of the heating heat exchanger can be adjusted by folding or unfolding the air mix door. In addition, the operating space of the air mixing door (particularly, the distance between the heating heat exchanger and the cooling heat exchanger) can be reduced.

In the air mixing for mixing the cold air and the hot air, the flow of the air from the cooling heat exchanger is divided into two by the bent air mixing door, and a part of the air flows to the cold air passage and the remaining air flows to the cold air passage. Are each guided to a heat exchanger for heating.

According to a third aspect of the present invention, in the air conditioner unit according to the first or second aspect of the present invention, the fixed guide for colliding cold air downstream of the cold air passage with hot air downstream of the hot air passage is provided. It is characterized by being provided in an air conditioner unit case.

At the time of air mixing, for example, the difference between the temperature of the air blown out from the vent blowout opening and the temperature of the air blown out from the foot blowout opening can be reduced more reliably.

[0019]

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

FIG. 1 is a sectional view showing the internal structure of a vertical air conditioner unit for a vehicle according to one embodiment of the present invention.

The air conditioner unit includes an evaporator (cooling heat exchanger) 1 for cooling air from a fan (not shown) and a heater core (heating heat exchanger) for heating air passing through the evaporator 1. 2, an air mixing door 3 for adjusting the ratio of air passing through the evaporator 1 and air passing through the heater core 2, and an evaporator 1,
An air conditioner unit case 4 that houses the heater core 2 and the air mix door 3 is provided.

The air conditioner unit case 4 is provided with an air inlet (not shown) for introducing air from a fan unit (not shown), a differential blow opening 6, a vent blow opening 7, and a foot. A blowing opening 8 is provided. The differential blow opening 6 and the vent blow opening 7 are opened and closed by an opening and closing door 9 and an opening and closing door 10. A foot outlet duct (not shown) is connected to the foot outlet opening 8.

Inside the air conditioner unit case 4, a hot air passage 14 through which air passing through the heater core 2 passes, a cool air passage 11 through which air bypassing the heater core 2 passes, and a cold air passage 1
Air mix chambers 22 where the air downstream of 1 and the air downstream of the hot air passage 14 join each other are formed.

FIG. 2 is a perspective view showing the air mix door, FIG. 3 shows the movement of the air mix door, FIG. 3 (a) is a view showing the deployed state of the air mix door, and FIG. 3 (b) is an air mix door. FIG. 3C is a view showing a folded state of the air mix door.

The air mix door 3 includes an L-shaped door member 15, a flat door member 16, and both door members 15,1.
6 are connected to each other. A shaft 18 is fixed to one end of the door member 15, and the door member 1
A movable rod 19 is fixed to one end of 6. An air mix door 3 is provided at the other end of the door member 16 as shown in FIG.
A J-shaped cover 20 that covers the hinge 17 when deployed as shown in FIG. An arch-shaped movable guide 21 is provided on the front surface of the door member 15.

When the air mix door 3 is opened and the cool air passage 11 is fully opened and the air inlet 2a of the heater core 2 is fully closed (at full cold), the movable guide 21 is provided with the cold air as shown in FIG. The cool air is guided along the passage direction C of the passage 11. When the air mix door 3 is folded most, the cold air passage 11 is fully closed and the air inlet 2a of the heater core 2 is fully open (full hot), as shown in FIG.
The movable guide 21 is located immediately downstream of the air mix door 3. When the air mix door 3 is kept almost half open, the cool air passage 11 is almost half open, and the air inlet 2a of the heater core 2 is also almost half open (at the time of air mixing), as shown in FIG. Part of the cold air is guided downstream of the hot air passage 124.

The air conditioner unit case 4 has a pair of shaft insertion holes (not shown) rotatably supporting both ends of the shaft 18 of the air mixing door 3, and a door member 16.
And a pair of guide grooves 23 for slidably engaging the movable rod 19 are provided. The shaft insertion hole is located near the end 2 b of the heater core 2 on the side of the cool air passage. The guide groove 23 is located upstream of the heater core 2 and is substantially parallel to the air inlet 2a of the heater core 2. A fixed guide 30 that guides cool air downstream of the hot air passage 14 is provided downstream of the cool air passage 11.

When an air conditioner switch (not shown) is set to a full cold mode, the air mix door 3
It is developed as shown in FIG. At this time, the movable guide 2
1 moves, and the movable guide surface 21 a of the movable guide 21 becomes substantially perpendicular to the passage direction C of the cool air passage 11.

The air introduced from the air inlet of the fan unit case 4 passes through the evaporator 1 and then passes through the cool air passage 11 from the air mixing chamber 22 to the differential blowing opening 6, the vent blowing opening 7, and the foot blowing. Opening 8
Proceed to. At this time, a part of the air collides with the movable guide 21, but since the movable guide surface 21a of the movable guide 21 is substantially perpendicular to the passage direction C of the cool air passage 11, the ventilation resistance by the movable guide 21 is small, Does not decrease.

When the opening / closing doors 9 and 10 are at the positions indicated by the solid lines in FIG. 1, the differential and vent outlet openings 6 and 7 are closed, so that air flows from the foot outlet opening 8 through a foot outlet duct (not shown) into the vehicle cabin. It is blown out to.

When the air conditioner switch is set to the air mix mode, the door member 15 of the air mix door 3 rotates around the shaft 18. Since the door member 15 and the door member 16 are connected by the hinge 17, when the door member 15 rotates, the movable rod 19 of the door member 16 slides in the guide groove 23 toward the cool air passage 11, and Stop halfway. At this time, the air mix door 3 bends, and the movable guide 21 also moves, so that the movable guide surface 21a of the movable guide 21 is inclined with respect to the passage direction C of the cool air passage 11, and the movable guide surface 21a moves downstream of the hot air passage 14. Turn around.

The flow of air from the evaporator 1 is divided into two by the bent air mix door 3, one of the air is guided by the door member 15 to the cold air passage 11, and the other air is guided to the door member 16. Then, the process proceeds to the heater core 2. The air guided to the heater core 2 is warmed when passing through the heater core 2, and travels in the hot air passage 14 along the fixed guide 12.

The air in the cool air passage 11 is guided by the fixed guide 30 to the downstream of the hot air passage 14, and is mixed with the hot air in the air mix chamber 22.

A part of the air in the cool air passage 11 is
Pass 1 As described above, since the movable guide surface 21a faces downstream of the hot air passage 14, the air passing through the movable guide 21 collides with the air downstream of the hot air passage 14, and the cool air and the hot air are mixed. As a result, for example, in the bi-level mode, the difference in the blowout temperature between the vent blowout opening 7 and the foot blowout opening 8 is reduced.

When the air conditioner switch is set to the full hot mode, the door member 15 of the air mix door 3 rotates, and the rod 19 of the door member 16 slides to the end of the guide groove 23 on the side of the cool air passage. At this time, the air mix door 3 is bent most greatly, and the door member 15 of the air mix door 3 comes closest to the inner wall surface of the cool air passage 11, and the cold air passage 1
1 is shut off. As a result, all the air that has passed through the evaporator 1 is sent to the heater core 2, passes through the heater core 2, passes through the hot air passage 14, and passes through the air mix chamber 2.
From 2, proceed to the differential blowing opening 6 side. At this time, since the movable guide surface 21a of the movable guide 21 is substantially perpendicular to the direction of the hot air passage 14, the airflow resistance of the movable guide 21 is small and the amount of hot air does not decrease.

According to this embodiment, the mixability of the cool air and the hot air during the air mixing is improved, and the temperature of the air blown out from the vent blowout opening 7 and the air blown out from the foot blowout opening in the bi-level mode. The difference from the temperature of the air can be reduced.

Further, since the area of the air inlet 2a of the heater core 2 is adjusted by bending or unfolding the air mixing door 3, the operating space of the air mixing door 3 in the vertical direction of the vehicle as compared with the conventional example. Therefore, the size of the air conditioner unit in the vehicle vertical direction can be reduced.

Further, at the time of full cold, since the movable guide surface 21a of the movable guide 21 is substantially perpendicular to the passage direction C of the cool air passage 11, the ventilation resistance of the movable guide 21 is small, and the amount of cool air does not decrease. And the noise does not increase.

Further, the cover 20 is connected to the hinge 1 during the maximum cooling.
7, the cold air does not leak to the heater core 2 side.

In the above embodiment, the case where the present invention is applied to a vertical air conditioner unit has been described.
It may be applied to a horizontal air conditioner unit.

[0041]

As described above, according to the air conditioner unit of the first aspect of the present invention, appropriate temperature adjustment (for example, bi-level control) can be performed without increasing the size of the unit case, reducing the amount of air blow, or increasing noise. The difference between the outlet temperature of the vent outlet and the outlet temperature of the foot outlet in the mode can be reduced.

According to the air conditioner unit of the second aspect of the invention, the opening area of the heating heat exchanger can be adjusted by folding or unfolding the air mixing door, and the operating space of the air mixing door can be reduced. The size can be reduced, and the size of the air conditioner unit can be reduced.

According to the air conditioner unit of the present invention, the difference between the temperature of the air blown out from the vent blowout opening and the temperature of the air blown out from the foot blowout opening can be more reliably determined during air mixing. Can be made smaller.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal structure of a vertical air conditioner unit for a vehicle according to an embodiment of the present invention.

FIG. 2 is a perspective view showing an air mix door.

FIGS. 3A and 3B are partial cross-sectional views showing the operation of the air mixing door, where FIG. 3A shows a state at the time of full cold, and FIG. 3B shows a state at the time of air mixing. FIG. 2C is a diagram showing a state at the time of full hot.

FIG. 4 is a conceptual diagram showing the internal structure of a conventional vertical air conditioner unit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 evaporator 2 heater core 3 air mix door 4 air conditioner unit case 6 differential blowing opening, 7 vent blowing opening 8 foot blowing opening 11 cold air passage 14 hot air passage 15, 16 door member 17 hinge 18 shaft 19 rod 23 guide groove 21 Movable guide

Claims (3)

[Claims] 1. A heating heat exchanger for heating air passing through a cooling heat exchanger, an air conditioner unit case accommodating the heating heat exchanger, and formed in the air conditioner unit case. A hot air passage through which the air passing through the heating heat exchanger passes; a cold air passage formed in the air conditioner unit case and passing air bypassing the heating heat exchanger; air downstream of the cold air passage and the temperature An air mix chamber where the air downstream of the air passage merges, and an air mix door that is provided in the air conditioner unit case and adjusts a ratio of air passing through the cold air passage and air passing through the heating heat exchanger. In the air conditioner unit, a portion of the cool air downstream of the cool air passage is guided to the downstream of the hot air passage during air mixing in conjunction with the opening / closing operation of the air mix door. An air-conditioning unit having an arch-shaped movable guide that guides the cool air along the direction of the cool air passage at the time of full cold. 2. The air mix door is foldable into two, and when full hot, the air mix door is folded to close the cold air passage, and the entire air inflow surface of the heating heat exchanger is opened. At the time of a full cold, the air mix door is opened to open the cold air passage, and the entire air inflow surface of the heat exchanger for heating is closed, and the air mix door is configured by first and second door members, One end of the first door member is rotatably mounted at a predetermined position on an end of the heating heat exchanger on the side of the cool air passage, and is provided near an air inflow surface of the heating heat exchanger, and In the guide groove parallel to the air inflow surface of the heat exchanger for heating,
One end of the second door member is slidably engaged, the other end of the first door member is connected to the other end of the second door member by a hinge, and the movable guide is The air conditioner unit according to claim 1, wherein the air conditioner unit is fixed to the first door member. 3. The air conditioner unit according to claim 1, wherein a fixed guide for causing cold air downstream of the cool air passage to collide with warm air downstream of the hot air passage is provided in the air conditioner unit case. .