JP3923182B2 - Vertical air conditioner for automobiles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a vertically mounted automobile air conditioner that improves temperature control characteristics of temperature-controlled air blown out from each air outlet in various modes.
[0002]
[Prior art]
In recent automobile air conditioners, an air cooling evaporator and an air heating heater core are generally arranged in the front and rear direction of the vehicle in the unit case in order to effectively use the space by making the device compact. In addition, there is a vertically-installed automobile air conditioner in which a cooler unit and a heater unit are provided as one case.
[0003]
For example, as shown in FIG. 5, this vertically mounted automobile air conditioner has a unit case 2, and air introduced from the upstream side of the unit case 2, that is, from an intake unit (not shown) through an inlet 3. The evaporator 4 is provided upright on the upstream side in the flow direction, and the heater core 5 is provided on the downstream side of the evaporator 4 so as to be slightly inclined downwardly.
[0004]
A mix door 7 is rotatably provided in the communication path 6 between the evaporator 4 and the heater core 5. This mix door 7 produces the air of predetermined temperature by changing the ratio of cold / hot air.
[0005]
For example, if the mix door 7 is set at an intermediate position in the communication passage 6, the air flow flowing through the lower passage 6 b of the communication passage 6 defined by the mix door 7 flows through the upper passage 6 a to the heater core 5 side. The air flow that flows through the heater core 5 passes through the heater core 5, and thereby the ratio of the air heated by the high-temperature engine coolant circulating in the heater core 5 (warm air) and the cold air from the upper passage 6 a is determined. A predetermined ratio is set, and these are mixed in the mix chamber 9 to be blown into the vehicle compartment as an air flow at a predetermined temperature.
[0006]
The unit case 2 is provided with a vent outlet 10 and a differential outlet 11 in the upper part of the mix chamber 9. Moreover, although the foot blower outlet 12 is provided in the lower part, both this foot blower outlet 12 and the vent blower outlet 10 may be alternatively opened or closed, or both may be opened simultaneously. Therefore, the foot duct 13 that guides air to the foot outlet 12 is extended to the vicinity of the vent outlet 10 along the terminal inner wall 2 a of the unit case 2, and the vent duct 10 has an inlet portion of the foot duct 13 . A vent / foot door 10a for opening / closing and opening / closing the foot outlet 12 is provided. The differential outlet 11 is opened and closed by a differential door 11a.
[0007]
Then, by appropriately operating the mix door 7, the differential door 11a, and the vent / foot door 10a, a defrost mode, a cooling mode (vent mode), a heating mode (foot mode), and a differential foot mode (defrosted) are removed. On the other hand, each mode such as a mode in which the foot is heated), a bi-level mode (a cold head heat mode), or the like is selected.
[0008]
For example, the bi-level mode is a position indicated by the solid line in FIG. 5, open as mixing door 7 and the vent foot door 10a is an intermediate position, situations that der the defroster door 11a is closed.
[0009]
The cool air cooled by the evaporator 4 and flowing into the communication passage 6 is branched by the mix door 7, and a part is blown out as it is from the vent outlet 10 toward the upper body of the passenger in the passenger compartment, and the rest is heated by the heater core 5. It is heated and blown out from the foot outlet 12 toward the feet of the occupant, resulting in a head cold foot heat state.
[0010]
[Problems to be solved by the invention]
However, in the conventional vertical-type automobile air conditioner 1, the cold air cooled by the evaporator 4 in the bi-level mode flows as shown by the solid line arrow in the figure, is guided to the vent outlet 10, and is heated by the heater core 5. The warm air thus produced flows upward along the foot duct 13 or the unit case end inner wall 2a on the side of the foot duct 13 as shown by the broken line arrow in the figure, and flows into the foot outlet 12. That is, the cold air easily flows into the vent outlet 10, and the warm air flows into the foot outlet 12 through a considerably long path.
[0011]
As a result, as shown by a broken line in FIG. 6, temperature-controlled air b2 blown out from the vent outlet 10 toward the upper body of the occupant and temperature-controlled air a2 blown out from the foot outlet 12 toward the feet of the occupant. There is a problem that the temperature difference becomes large and the comfort is impaired.
[0012]
The present invention has been made in order to solve the above-described problem, and in the combined mode in which the vent outlet and the foot outlet are simultaneously opened, the temperature of the temperature-controlled air blown out from the vent outlet and the foot outlet. It is an object of the present invention to provide a vertical-type automotive air conditioner that reduces the difference and enhances comfort.
[0013]
[Means for Solving the Problems]
The object of the present invention is achieved by the following means.
(1) An evaporator and a heater core are erected in the unit case, and a mix door is rotatably provided in a communication path that communicates the evaporator and the heater core. An air flow that flows through the communication path is generated by the mix door. The lower passage that flows to the heater core side and the upper passage that bypasses the heater core are branched to mix the warm air heated by the heater core and the cold air that has flowed through the upper passage in a mix chamber. Vertically arranged to selectively distribute air to a predetermined position in the vehicle interior by opening and closing the doors provided at the vent outlet, the differential outlet, and the foot outlet provided so as to communicate with the chamber. In the air conditioner for a stationary vehicle, the vent outlet and the differential outlet are provided above the mix chamber, and the upper The foot blower outlet is opened so as to face the flow path of the airflow that has circulated through the passage, and a foot duct that guides intake air to the outside of the unit case is provided in the foot blower outlet, and the unit case of the foot duct is provided. A passage that forms a bypass passage between the foot air intake portion inside and a terminal inner wall of the unit case, and guides hot air that has passed through the heater core to the bypass passage between the bottom wall of the unit case vertical type automotive air conditioning system, characterized in that the formation of the.
[0014]
(2) The vertical air-conditioning apparatus for automobiles, wherein the foot door is provided so that a front end of the door faces the upper passage.
[0015]
(3) The vertically mounted automobile characterized in that the foot door is a rotatable cantilever door having a fulcrum above the foot air intake portion between the upper passage and the mix chamber. Air conditioning equipment.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show a vertical-type automotive air conditioner according to an embodiment of the present invention. FIG. 1 is a sectional view showing a state in a bilevel mode, and FIG. 2 is a state in a defrost mode. FIG. 3 is a cross-sectional view showing a state in the vent mode, FIG. 4 is a cross-sectional view showing a state in the differential-foot mode, and members common to the members shown in FIG. is doing.
[0018]
In FIG. 1, a longitudinally mounted automobile air conditioner includes an air cooling evaporator 4 on an upstream side of an air flow and an air heating heater core 5 on the downstream side of the evaporator 4 in a unit case 2. It is provided and arranged side by side in the front-rear direction of the vehicle, and a blower (not shown) is provided on the side of the vehicle so as to take in air from the inlet 3 opened in the unit case 2. This reduces the space in the left-right direction of the vehicle of the entire air conditioner, and in particular widens the foot space of the passenger seat.
[0019]
A mixing door 7 is rotatably provided in the communication path 6 between the evaporator 4 and the heater core 5. The mix door 7 distributes the cold air that has passed through the evaporator 4 to the lower passage 6b that passes through the heater core 5 and the upper passage 6a that passes through the heater core 5 and adjusts the ratio of the cold air and the hot air. When the cool air and the warm air are mixed in the mix chamber 9, air of a predetermined temperature is obtained.
[0020]
The downstream side of the mix door 7 is a mix chamber 9 for mixing the cool air that has passed through the upper passage 6 a and the warm air that has passed through the lower passage 6 b and is heated by the heater core 5.
[0021]
At the top of the mix door 7, a defroster air outlet 11 for toward the windshield of the vehicle front side blowing temperature control air, the vent outlet 10 for blowing temperature control air toward the upper body of the ride-membered Is provided.
[0022]
In particular, in the present embodiment, the foot outlet 12 is opened so as to face the flow path of the air flow that has circulated through the upper passage 6a. If it does in this way, the cold wind which distribute | circulated the upper channel | path 6a will be easy to flow in directly into the foot blower outlet 12, and it can prevent the increase in the up-and-down temperature difference at the time of the bilevel mode mentioned above.
[0023]
A foot duct 13 led to the outside of the unit case 2 is connected to the foot outlet 12. The foot air intake portion 20 in the unit case 2 of the foot duct 13 is provided apart from the terminal inner wall 2a so that a bypass passage 21 is formed between the terminal case 2 and the terminal inner wall 2a. Also, a passage 22 is formed between the bottom wall 2 b of the unit case 2 to guide the warm air that has passed through the heater core 5 to the bypass passage 21.
[0024]
The vent outlet 10 and the differential outlet 11 are provided with a vent / differential door 23 for selectively opening and closing the outlets 10 and 11 in a rotatable manner. However, this door 23 is good also as two doors which open and close independently at the vent blower outlet 10 and the differential blower outlet 11, respectively.
[0025]
Moreover, the foot door 12a is provided in the foot blower outlet 12 so that rotation is possible. The foot door 12a is a cantilever door having a fulcrum above the foot air intake portion 20, and is provided so that the front end portion, that is, the free end side of the door 12a faces the upper passage 6a.
[0026]
If it does in this way, at the time of the bi-level mode which opens the vent blower outlet 10 and the foot blower outlet 12 simultaneously, the foot door 12a itself functions as a guide which guides a part of cold wind which passes the upper channel | path 6a to the foot blower outlet 12. In addition, it is possible to introduce cooler air more smoothly, and to prevent an increase in the temperature difference between the upper and lower sides in the bi-level mode. Further, if this is rotated, the amount of cool air introduced into the foot outlet 12 is also adjusted. Therefore, it is possible to adjust the temperature difference between the head and the foot in the bi-level mode.
[0027]
If the bypass passage 21 is formed between the foot outlet 12 and the terminal inner wall 2a of the unit case 2, a part of the warm air that has passed through the heater core 5 is affected by the air flow that flows through the upper passage 6a. Instead, the air is directly guided to the vent outlet 10 or the differential outlet 11 through the bypass passage 21. That is, the heater core warm air from 5 rather small you to temperature drop is influenced by the cold air is guided to the high-temperature while the vent outlet 10 or defroster outlet 11, whereby the bi-level mode of the upper and lower difference temperature also This prevents the increase of.
[0028]
Further, if the foot air intake 20 forms a passage 22 between the bottom wall 2 b of the unit case 2 and the hot air that has passed through the heater core 5, the passage 22 leads to the bypass passage 21 and passes through the heater core 5. The warm air flowing along the bottom wall 2b can be smoothly guided to the vent outlet 10 or the differential outlet 11, and the flow of air becomes smooth, and the comfort of temperature control can be further enhanced.
[0029]
Next, the operation of the vertically mounted automobile air conditioner will be described. In the figure, the flow of cold air is indicated by solid line arrows, and the flow of hot air is indicated by broken line arrows.
[0030]
《Bi-level mode》
When the bi-level mode is set, as shown in FIG. 1, the mix door 7 is set at an intermediate position of the communication path 6, and the vent / def door 20 opens the vent outlet 10 and opens the differential outlet 11. The state is “closed”. Further, the foot door 12a rotates upward. In this bi-level mode, the foot door 12a does not rotate to the uppermost position, and an air passage is formed from the upper passage 6a to the vent outlet 10.
[0031]
When set in this way, the cold air from the evaporator 4 is branched into the upper passage 6a and the lower passage 6b by the mix door 7, and the cold air flowing through the upper passage 6a passes above and below the foot door 12a, most of which The remainder is guided by the foot door 12 a to the vent outlet 10 and led to the foot outlet 12.
[0032]
On the other hand, the cold air led to the lower passage 6b by the mix door 7 is heated by the heater core 5, a part thereof is led to the foot outlet 12, guided by the foot door 12a, and flows into the foot outlet 12. In this case, since it is mixed with a part of the cool air that has passed through the upper passage 6a, the air becomes warm air having a low temperature and flows into the foot duct 13.
[0033]
Further, a part of the warm air heated by the heater core 5 flows along the bottom wall 2b of the unit case 2, and is guided to the vent outlet 10 through the passage 22 and the bypass passage 21, and passes through the upper passage 6a. The temperature of the cold air that flows and flows into the vent outlet 10 is lowered to some extent.
[0034]
Thus, in the bi-level mode, the cool air and a part of the warm air heated by the heater core 5 are directly guided to the vent air outlet 10, and the foot air outlet 12 is mixed in the mix chamber 9. A part of the cool air that has passed through the upper passage 6a is directly guided along with the warm air thus generated, so that the temperature control characteristic of the temperature-controlled air is improved and the temperature difference between the head and feet of the occupant is reduced.
[0035]
That is, as shown by a solid line in FIG. 6, the temperature-controlled air b1 blown from the vent outlet 10 toward the upper body of the occupant and the temperature-controlled air a1 blown from the foot outlet 12 toward the occupant's feet. The temperature difference is reduced and comfort is enhanced.
[0036]
Moreover, since the amount of cold air leakage to the vent outlet 10 can be adjusted by changing the angle at which the foot door 12a rotates upward, the temperature-controlled air blown out from the vent outlet 10 into the vehicle interior. It is also possible to finely adjust the temperature, thereby further improving the comfort.
[0037]
《Defrost mode》
When the defrost mode for clearing the windshield is set, as shown in FIG. 2, the vent / diff door 20 sets the differential blower outlet 11 to “open” and the vent blower outlet 10 to “closed”. The foot door 12a rotates downward, and the foot outlet 12 is closed.
[0038]
In this mode, the cold air after being dehumidified by the evaporator 4 is branched up and down by the mixing door 7 in the communication path 6 and is guided to the upper communication path 6 and to the lower path 6 b and heated by the heater core 5. The warm air thus produced is mixed in the mix chamber 9 and guided to the differential outlet 11.
[0039]
A part of the warm air heated by the heater core 5 is guided to the differential outlet 11 through the bypass passage 21.
[0040]
Thus, in the defrost mode, a part of the warm air heated by the heater core 5 is directly guided to the differential blower outlet 11 together with the temperature-controlled air mixed in the mix chamber 9 toward the inner surface of the windshield. To blow out the windshield and remove the fog.
[0041]
《Bent mode》
When the vent mode is set, as shown in FIG. 3, the vent / diff door 20 is in the “open” state of the vent air outlet 10 and the differential air outlet 11 is in the “closed” state. The foot door 12a rotates downward, and the foot outlet 12 is closed.
[0042]
In the vent mode, the temperature of the air sent from the vent outlet 10 into the vehicle compartment is adjusted by the rotational position of the mix door 7. In other words, the position of the mix door 7 is controlled so that the temperature control characteristic is optimum, and when the mix door 7 is rotated upward, the ratio of the cold air increases and the ratio of the hot air decreases. The temperature of the air that is done rises. On the other hand, when the mix door 7 is rotated downward, the amount of cold air is increased and the amount of hot air is decreased, so that the temperature of the air blown into the passenger compartment is lowered.
[0043]
In this state, the mix door 7 causes the cool air to be branched up and down in the communication path 6, and the cool air guided to the upper path 6 a and the warm air guided to the lower path 6 b and heated by the heater core 5 are mixed chambers. 9 is mixed and led to a vent outlet 10 at a predetermined temperature.
[0044]
A part of the warm air heated by the heater core 5 is directly led to the vent outlet 10 through the bypass passage 21.
[0045]
《Diff-foot mode》
When the differential-foot mode for heating the feet while clearing the windshield fog is set, the vent / def door 20 rotates toward the vent outlet 10 as shown in FIG. Is “closed”, the differential outlet 11 is in the “open” state, the foot door 12a is rotated upward, and the foot outlet 12 is “open”.
[0046]
In this mode, cold air is branched up and down in the communication path 6 by the mix door 7, and a part of the cool air guided to the upper path 6a is guided to the mix chamber 9 through the upper part of the foot door 12a, and the rest is directly It is guided to the foot outlet 12.
[0047]
On the other hand, the cool air guided to the lower passage 6 b is heated by the heater core 5 to become warm air, a part thereof is guided to the foot outlet 12, and the rest is guided to the mix chamber 9 through the bypass passage 21.
[0048]
Therefore, in the mix chamber 9, the cool air from the upper passage 6 a and the warm air from the bypass passage 21 are mixed and led to the differential outlet 11 at a predetermined temperature. On the other hand, a part of the warm air heated by the heater core 5 and a part of the cool air from the lower passage 6 b are guided to the foot outlet 12 and are distributed through the foot duct 13 into the vehicle interior.
[0049]
The foot door 12a can be pivoted from the lowest position for closing the foot outlet 12 to the highest position for closing the upper passage 6a. The temperature of the blown air can be adjusted to some extent.
[0050]
The embodiment described above is described for facilitating understanding of the present invention, and is not described for limiting the present invention. Therefore, each element disclosed in each of the above embodiments is intended to include all design changes and equivalents belonging to the technical scope of the present invention.
[0051]
For example, in the above-described embodiment, the foot door 12a is a cantilever door, but the present invention is not limited to this and may be a butterfly door. Nor.
[0052]
【The invention's effect】
As described above, according to the first aspect of the present invention, the foot air outlet is provided so as to face the flow path of the air flow flowing through the upper passage, and the foot air intake of the foot duct connected to the foot air outlet is provided. Since a bypass passage is formed between the inlet and the inner end wall of the unit case, the temperature-controlled air blown out from the vent outlet and the foot outlet in the bi-level mode in which the vent outlet and the foot outlet are opened simultaneously. The temperature difference between the two can be reduced and the comfort at the bi-level can be improved. In addition, since the passage that guides the warm air that has passed through the heater core to the bypass passage is formed between the bottom wall of the unit case, the warm air that has passed through the heater core can be smoothly guided to the vent outlet or the differential outlet. , Comfort can be further enhanced.
[0053]
According to the second aspect of the present invention, the foot door is a cantilever door that can be pivoted, and the front end of the door faces the upper passage. Therefore, the foot door opens the vent outlet and the foot outlet. In the bi-level mode, it becomes a guide that guides a part of the cool air passing through the upper passage to the foot outlet, so that the cool air can be more easily guided to the foot outlet and the comfort at the bi-level can be further enhanced.
[0054]
According to the third aspect of the present invention, the foot door is provided between the upper passage and the mix chamber, and is constituted by a rotatable cantilever door having a fulcrum above the foot air intake portion. The amount of cold air flowing into the air outlet can also be adjusted, the temperature of the temperature-controlled air blown into the vehicle compartment from the vent air outlet or the differential air outlet can be made appropriate, and comfort can be improved. .
[Brief description of the drawings]
FIG. 1 is a sectional view in a bi-level mode according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view in a defrost mode according to the embodiment.
FIG. 3 is a cross-sectional view of the embodiment in a vent mode.
FIG. 4 is a cross-sectional view of the embodiment in a differential foot mode.
FIG. 5 is a cross-sectional view of a conventional vertical air conditioner for an automobile.
FIG. 6 is a diagram showing temperature control characteristics in the bi-level mode of the conventional device and the device of the present invention.
[Explanation of symbols]
2 ... Unit case,
2a ... the inner wall of the end of the unit case,
2b ... the bottom wall of the unit case,
4 ... Evaporator,
5 ... Heater core,
6 ... Communication passage,
6a ... Upper passage,
6b ... lower passage,
7 ... Mixed door,
9 ... mix chamber,
10 ... Vent outlet,
11 ... Differential outlet,
12 ... Foot outlet,
12a ... foot door,
13 ... Foot duct,
20 ... Foot air intake,
21 ... Bypass passage,
22 ... passage,
23 ... Bent def door.

Claims (3)

In the unit case (2), the evaporator (4) and the heater core (5) are erected, and the mix door (7) is routed to the communication path (6) that connects the evaporator (4) and the heater core (5). A lower passage (6b) for flowing the air flow through the communication passage (6) to the heater core (5) by the mix door (7), and an upper portion for bypassing the heater core (5). The hot air heated by the heater core (5) and the cool air flowing through the upper passage (6a) are mixed in the mix chamber (9) and branched into the passage (6a). By opening and closing the doors (10a, 11a, 12a) provided at the vent outlet (10), the differential outlet (11), and the foot outlet (12) provided to communicate with each other as appropriate. In a vertically installed automotive air conditioner that selectively distributes air at a predetermined position in the room,
The vent outlet (10) and the differential outlet (11) are provided above the mix chamber (9),
Opening the foot outlet (12) so as to face the flow path of the air flow that circulated through the upper passage (6a),
A foot duct (13) for guiding the intake air to the outside of the unit case (2) is provided at the foot outlet (12),
While forming a bypass passage (21) between the foot air intake (20) in the unit case (2) of the foot duct (13) and the terminal inner wall (2a) of the unit case (2) , A vertical passage characterized in that a passage (22) for guiding the warm air that has passed through the heater core (5 ) to the bypass passage (21 ) is formed between the bottom wall (2b ) of the unit case (2). Air conditioner for stationary vehicles.   The longitudinally-mounted automobile air conditioner according to claim 1, wherein the foot door (12a) is provided so that a front end portion of the door (12a) faces the upper passage (6a).   The foot door (12a) has a fulcrum between the upper passage (6a) and the vent outlet (10) and the differential outlet (11) and above the foot air intake section (20). The longitudinally-mounted automobile air conditioner according to claim 1 or 2, wherein the cantilever door is rotatable.

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