JP2003039936A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner that prevents a drop in pressure loss. SOLUTION: This air conditioner is provided with a casing 2 that forms the air flow passage, a heater core 6 and an air mix damper 13. In the air conditioner, the air flow is divided by the air mix damper 13 into a first passage 25 passing through the heater core 6 and a second passage 26 not passing through the heater core 6, and a guide plate 30 is provided at the downstream side of the heater core 6 for joining the air flows from the first passage 25 and the second passage 26. The guide plate 30 is installed movably freely between the housing position A near the wall inside the casing 2 and the using position B within the width of the flow passage, and the air flows from the passages 25, 26 are joined when the plate 30 is located at the housing position A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner mounted on a vehicle, and more particularly to a structure of an air mix damper.

[0002]

2. Description of the Related Art The one shown in FIG. 5 and FIG.
It is a vehicle temperature control unit called a C (Heating, Ventilation, and Air-Conditioning) unit. The temperature control unit 1 includes a casing 2, an outside air introduction port 3, an inside air introduction port 4, a blower fan 5 with a built-in motor, a heater core 6, and an evaporator 7. A blower fan 5 is provided at one end of the casing 2, an outside air introduction port 3 and an inside air introduction port 4 are provided at the side of the casing 2 adjacent to the blower fan 5, and the other end of the casing 2 is provided. An air-conditioning air outlet 10 for defrosting and face blowing is provided at the upper part of, and a foot outlet 11 is provided at the bottom. Further, reference numeral 20 is a filter for removing dirt and the like of the outside air when air is taken in from the outside air introduction port 3, and is detachably attached to the outside air introduction port 3. These air conditioning air outlets 10 and foot outlets 11
A duct (not shown) is connected to this so that conditioned air can be sent to a predetermined position in the vehicle. A foot damper 11a is provided at the foot outlet 11, and a face outlet that blows the conditioned air to the face and a defrost outlet that blows the conditioned air to the face are provided at the tip of the duct downstream of the conditioned air outlet. Since the face damper and the defrost damper that control the blowing of the conditioned air are provided at the air outlet, it is possible to control the distribution of the conditioned air to each of the air outlets.

Outside and inside air inlets 3 and 4 and outlet 1
The heater core 6 and the evaporator 7 are provided between the heater core 6 and the heater core 6, and the heater core 6 heats the introduced air to either the outside air introduction port 3 or the inside air introduction port 2. An air mix damper 13 for adjusting the amount of air is provided. With this configuration, the air that has flowed in from the outside air or inside air inlets 3 and 4 passes through the evaporator 7 or the heater core 6, is air-conditioned, and is then blown out into the vehicle compartment through the outlets 10 and 11. It has become so.

Here, in the vehicle air conditioner, the conditioned air is distributed and blown into the vehicle compartment in accordance with various operation modes described below.

The "face blowing mode" is an operation mode for blowing cold air toward the upper half of the occupant mainly during cooling operation in summer. In this case, the foot damper 11
A is closed to send conditioned air to the conditioned air outlet 10, and a face damper (not shown) provided downstream of the conditioned air outlet 10 directs all of the cooled and dehumidified wind to the occupant from the face outlet. Blow out.

The "defrost blowing mode" is an operation mode for defrosting the windshield before running in winter and for removing fog on the windshield during running in rainy weather. The foot damper 11a is closed and the conditioned air outlet 10 is conditioned. In addition, the defrost damper (not shown) provided downstream of the conditioned air outlet 10 blows out the entire amount of the cooled and dehumidified air from the defrost outlet. As a result, the entire amount of the warm air and the dehumidified air is blown out from the air outlet so as to directly hit the inner surface of the windshield or the like.

The "foot blowout mode" is an operation mode in which warm air is blown out to the feet of an occupant mainly during heating operation in winter. In this case, the damper 11a is opened and the conditioned air is sent to the foot outlet 11. As a result, the conditioned air (warm air) is mainly blown to the foot outlet 11. The "bi-level blowout mode" is an operation mode that is mainly used in the middle of spring or autumn and blows out conditioned air from both the face outlet and the foot outlet. In this case, the conditioned air outlet 10 and the foot outlet 1
Both 1 and 1 are opened, and air is blown toward the upper half of the occupant's body and feet through the face outlet and the foot outlet 11.

The "defrost foot blowing mode" is an operation mode used in winter. In this case, both the conditioned air outlet 10 and the foot outlet 11 are opened, and air is blown toward the windshield and the foot through the defrost outlet and the foot outlet 11.

[0009]

In the bi-level mode in which both the face and the foot are blown out, and in the defrost / foot mode in which both the defrost and the foot are blown out, air conditioning is performed from both the air conditioning air outlet 10 and the foot outlet 11. The air is blown out. In the bi-level mode, the temperature of the conditioned air blown to the face is lower than the temperature of the conditioned air blown from the foot outlet, by performing air conditioning so that it becomes so-called head cold foot heat,
You can get a comfortable environment. However, the heater core 6
Is provided in the lower portion of the casing 2 like the foot outlet, so that the warm air passing through the heater core 6 is supplied to the foot outlet 11 and the heater core 6 is supplied to the conditioned air outlet 10 as shown by an arrow in the figure. Cold air that does not pass through is discharged.
In this state, there is too much temperature difference between the air discharged from the foot outlet 11 and the air conditioning air outlet 10,
As shown in FIG. 7, by providing a guide plate 20 on the downstream side of the heater core 6 for merging the conditioned air that has passed through the heater core 6 with the air that does not pass through the upper heater core 6, it becomes easier to mix cold air and warm air. , The temperature difference is reduced. However, in the foot mode in which the conditioned air is blown out only from the foot outlet 11, the guide plate 20 obstructs the flow path, resulting in a pressure loss and a reduction in the air volume.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air conditioner which prevents a decrease in pressure loss.

[0011]

According to a first aspect of the present invention, there is provided a casing forming an air flow path, a heater core housed in the casing, and an air mix damper. The flow is branched into a first flow passage that passes through the heater core and a second flow passage that does not pass through the heater core, and the air flow that has flowed through the first flow passage and the second flow passage that is downstream of the heater core In the air conditioner provided with a guide plate that joins the air flow flowing through the second flow channel, the guide plate has a storage position stored near the wall of the casing and a use position inside the flow channel. Movably provided between the air passages, the air flow flowing through the first flow path and the air flow flowing through the second flow path merge when the guide plate is located at the use position. It is characterized by being done.

In the present invention, in the case of the defrost foot blowing mode and the bilevel blowing mode,
The first flow path and the second flow path are merged by locating the guide plate at the use position. In the case of the single blowing mode (face, foot, defrost blowing mode), the guide plate is positioned at the storage position to prevent obstacles to the flow path.

According to a second aspect of the present invention, in the vehicle air conditioner according to the first aspect, the first flow path and the second flow path are provided.
A fixing plate is provided in either one of the flow paths of the guide plate, and the guide plate has a position where the guide plate overlaps with the fixing plate and a use position is the first flow path and the second flow path. It is characterized in that it is movable between the position moved to either the other side of the above.

In the present invention, in the case of the single blowing mode, the guide plate and the fixed plate are overlapped to prevent the guide plate from obstructing the flow path. In the defrost foot blowing mode and the bi-level blowing mode, the first flow path and the second flow path are moved by moving the guide plate from the state where it overlaps with the fixed plate and positioning it inside the flow path. Join.

According to a third aspect of the present invention, in the vehicle air conditioner according to the first aspect, a guide accommodating portion for accommodating the guide plate is provided between the heater core and the casing, and the guide is provided. The plate is configured to be movable between the inside of the guide accommodating portion as the accommodating position and the outside of the guide accommodating portion as the use position.

In the present invention, in the case of the single blowing mode, the guide plate is housed in the guide housing portion to prevent the guide plate from obstructing the flow path. In the case of the defrost foot blowing mode and the bi-level blowing mode, the first flow path and the second flow path are joined by moving the guide plate out of the guide accommodating portion.

According to a fourth aspect of the present invention, in the vehicle air conditioner according to the first aspect, the guide plate has its front end facing the downstream side oscillated in the flow passage width direction.
It is characterized in that it is movable between the storage position and the use position.

In the present invention, in the single blowing mode, the guide plate is swung to the storage position. This prevents the guide plate from obstructing the flow path. In the case of the defrost foot blowing mode and the bi-level blowing mode, the first flow path and the second flow path are joined by positioning the guide plate at the use position.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a first embodiment of the present invention will be described with reference to the drawings. It should be noted that the same reference numerals are used for the same configurations as the conventional one, and the description thereof will be omitted. FIG. 1 shows a sectional view of a temperature control unit as an air conditioner of this example. The inside of the casing 2 serves as an air flow passage, and the evaporator 7 occupies the entire flow passage cross-sectional area. A heater core 6 is provided below the evaporator 7 and the outlets 10 and 11.

The air flow is branched by the air mix damper 13 into a first flow path 25 that passes through the heater core 6 and a second flow path 26 that does not pass through the heater core 6, and is located downstream of the heater core 6. Is provided with a guide plate 30 that joins the first flow path 25 and the second flow path 26. The guide plate 30 is provided near the fixed plate 31. One end of the fixing plate 31 is in contact with the casing 2, and the other end (tip) is provided toward the second flow path 26 side. Further, the shape thereof is an arc shape that bulges toward the bottom surface on the downstream side in a side sectional view. The guide plate 30 has an arcuate shape in a side cross section, and is located between the use position B moved to the second flow path 26 shown in FIG. 1 and the storage position A overlapping the fixed plate 31 shown in FIG. It can be moved freely. The movement path is along the arc of the fixed plate 31. In the state where the guide plate 30 is located at the use position B, the guide plate 30 smoothly continues to the tip of the fixed plate 31 (tip on the second flow path side) and extends in the direction of the second flow path 26. .

In the vehicle air conditioner thus constructed, the guide plate is positioned as follows in each blowing mode. In the defrost / foot blowing mode, the guide plate 30 is positioned at the use position B. In this state, since the first flow path 25 and the second flow path 26 are merged by the guide plate 30, the conditioned air that has passed through the heater core 6 rises by the guide plate 30 as shown by the arrow in FIG. The conditioned air that has been mixed with the cold air that has passed through the second flow path 26 and has an appropriately lowered temperature is blown out from the foot outlet 11 and the air that has an appropriately raised temperature is blown out from the conditioned air outlet 10. . Therefore, the conditioned air that realizes a head cold foot heat state with an appropriate temperature difference is blown from both sides.

In the single blowing mode such as the foot blowing mode and the face blowing mode, the guide plate 3 is used.
0 is placed in the storage position A and is housed in a state of being overlapped with the fixed plate 31. In this state, the guide plate 30 has the first flow path 2
5, the conditioned air that has passed through the heater core 6 is discharged from either the conditioned air outlet 10 or the foot outlet 11 without impeding its flow as shown by the arrow in FIG.

As described above, in the vehicle air conditioner of this embodiment, since the guide plate 30 is configured to be movable, the air is discharged from both outlets 10 and 11 in the defrost foot blowing mode. The temperature of the air can be made appropriate, and pressure loss does not occur in the single blowing mode, so that performance deterioration can be prevented.

Next, a second embodiment of the present invention will be described. The same components as those in the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted. FIG. 3 is a side sectional view of the vehicle air conditioner according to the second embodiment. As shown in the figure, between the heater core 6 and the casing 2 ', there is provided a guide accommodating portion 39 which forms an arcuate gap in cross section as it bulges outside the casing 2'. The guide plate 40 has substantially the same arc as the arc of the outer edge of the guide housing portion 39. Then, the guide accommodating portion 39
It can be inserted into and removed from the guide accommodating portion 39 as the accommodating position A and the guide accommodating portion 3 as the use position B.
It is configured to be movable between the outside and the outside. The movement locus is within a circle including the arc of the guide plate 40 in a side sectional view.

In the vehicle air conditioner thus constructed, in the defrost / foot blowing mode or the bi-level blowing mode, the guide plate 40 is moved out of the guide accommodating portion 39 to remove the first flow. Road 25 and second
The flow path 26 of the above is joined by the guide plate 40. For this reason, the conditioned air that has passed through the heater core 6 rises by the guide plate 40, is partially mixed with the cool air that has passed through the second flow path 26, and the conditioned air whose temperature has dropped appropriately from the foot outlet 11 is obtained. However, the air whose temperature has risen appropriately is blown out from each conditioned air outlet 10. Therefore,
Both sides blow out conditioned air that realizes a head cold foot heat condition with an appropriate temperature difference. In the single blowing mode (face, foot, defrost blowing mode),
The guide plate 40 is housed in the guide housing portion 39. In this state, the guide plate 40 does not obstruct the first flow path 25, so that the conditioned air that has passed through the heater core 6 is not obstructed in its flow and either the conditioned air outlet 10 or the foot outlet 11 is provided. Is discharged from.

As described above, in the vehicle air conditioner of this example, the guide plate 40 is configured to be movable, so that the air is discharged from both outlets 10 and 11 in the defrost foot blowing mode. The temperature of the air can be made appropriate, and pressure loss does not occur in the single blowing mode, so that performance deterioration can be prevented.

Next, a third embodiment of the present invention will be described. The same components as those in the first embodiment will be designated by the same reference numerals, and the description thereof will be omitted. FIG. 4 is a side sectional view of the vehicle air conditioner according to the third embodiment. In the figure, reference numeral 49 is a fixed plate. One end of the fixing plate 49 is in contact with the bottom surface of the casing 2, and the other end is provided toward the second flow path side.
A guide plate 50 is swingably provided at the tip of the fixed plate 49. The guide plate 50 has a structure in which the rotation axis is oriented in the width direction of the flow path, and the tip of the guide plate 50 swings in the front-back direction of the flow path. At the use position B located near the second flow path 26, at the storage position A located near the casing 2, the tip of the guide plate 50 contacts the casing 2 and is hidden behind the fixed plate 49.

In the vehicle air conditioner thus configured, in the defrost / foot blowing mode or the bi-level blowing mode, the guide plate 50 is swung to the operating position B to move the conditioned air. Is partly mixed with the cool air that has risen by the guide plate 50 and has passed through the second flow path 26, and the conditioned air whose temperature has dropped appropriately from the foot outlet 11 and the conditioned air from the conditioned air outlet 10. The air whose temperature has risen moderately is blown out. Therefore, the conditioned air that realizes a head cold foot heat state with an appropriate temperature difference is blown from both sides. In the case of the single blowing mode (face, foot, defrost blowing mode), the guide plate 50 is positioned at the storage position A. In this state, the guide plate 50 does not obstruct the first flow path 25, so that the conditioned air that has passed through the heater core 6 is not obstructed in its flow and either the conditioned air outlet 10 or the foot outlet 11 is provided. Is discharged from.

As described above, in the vehicle air conditioner of this embodiment, since the guide plate 50 is configured to be movable, the air is discharged from both outlets 10 and 11 in the defrost foot blowing mode. The temperature of the air can be made appropriate, and pressure loss does not occur in the single blowing mode, so that performance deterioration can be prevented.

In the first and second embodiments, the guide plate has an arcuate cross section, but the invention is not limited to this.
It may be flat. However, since the arcuate shape allows a wider distance from the heater core 6, it is possible to smoothly guide the air flow without reducing the air volume. Further, in the case of the second embodiment, by making the guide plate arcuate in cross section, the guide can be smoothly accommodated in the guide accommodating portion 39 in a space-saving manner. Further, in each embodiment, any means may be used as a means for driving the guide plate. For example, a motor, a link mechanism, etc. can be adopted.

[0031]

As described above, according to the invention of claim 1 which can obtain the following effects in the present invention, in the case of the defrost foot blowing mode and the bi-level blowing mode, the guide plate is used. The first flow path and the second flow path are merged by locating at the use position.
Thereby, the temperature of the air discharged from the air outlet can be made appropriate. Then, in the case of the single blowing mode (face, foot, defrost blowing mode), the guide plate is positioned at the storage position to prevent the flow path from being obstructed. As a result, pressure loss does not occur, and performance deterioration can be prevented.

According to the second aspect of the present invention, in the case of the single blowing mode, the guide plate and the fixed plate are overlapped to prevent the guide plate from obstructing the flow path.
Therefore, since pressure loss does not occur, performance deterioration can be prevented. In the defrost / foot blowing mode and the bi-level blowing mode, the first flow path and the second flow path are merged by moving the guide plate from the state where it overlaps with the fixed plate and placing it in the use position. . Thereby, the temperature of the air discharged from the air outlet can be made appropriate.

According to the third aspect of the invention, in the case of the single blowing mode, the guide plate is housed in the guide housing portion, so that the guide plate is prevented from obstructing the flow path. Therefore, since pressure loss does not occur, performance deterioration can be prevented. In the case of the defrost foot blowing mode and the bi-level blowing mode, the first flow path and the second flow path are joined by moving the guide plate out of the guide accommodating portion. Thereby, the temperature of the air discharged from the air outlet can be made appropriate.

According to the fourth aspect of the invention, in the single blowing mode, the guide plate is swung to the storage position. This prevents the guide plate from obstructing the flow path. Therefore, since pressure loss does not occur, performance deterioration can be prevented. In the defrost foot blowing mode and bilevel blowing mode,
By positioning the guide plate at the use position, the first flow path and the second flow path are merged. Thereby, the temperature of the air discharged from the air outlet can be made appropriate.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a temperature control unit shown as an embodiment of the present invention, showing a state where a guide plate is located at a use position.

FIG. 2 is a cross-sectional view of the temperature control unit shown as an embodiment of the present invention, and is a view showing a state where the guide plate is located at the storage position.

FIG. 3 is a cross-sectional view of a temperature control unit shown as another embodiment of the present invention.

FIG. 4 is a sectional view of a temperature control unit shown as another embodiment of the present invention.

FIG. 5 is an external view of the temperature control unit, and is a perspective view when different angles are viewed in (a) and (b).

FIG. 6 is a cross-sectional view of a conventional temperature control unit.

FIG. 7 is a sectional view of a conventional temperature control unit.

[Explanation of symbols]

2 casing 6 heater core 7 Evaporator 25 First flow path 26 Second channel 30, 40, 50 Guide plate 31 Fixed plate 39 Guide storage 49 fixed plate A storage position B Use position

Claims (4)

[Claims] 1. A first flow path comprising a casing forming an air flow path, a heater core housed in the casing, and an air mix damper, wherein an air flow passes through the heater core by the air mix damper. , A second flow path that does not pass through the heater core, and joins the air flow flowing through the first flow path and the air flow flowing through the second flow path downstream of the heater core. In the air conditioner provided with a guide plate for allowing the guide plate to be provided, the guide plate is movably provided between a storage position stored near the wall portion of the casing and a use position inside the flow path, and the guide plate is provided. An air conditioner for a vehicle, wherein the air flow flowing through the first flow path and the air flow flowing through the second flow path are combined when the vehicle is located at the use position. 2. The vehicle air conditioner according to claim 1, wherein a fixing plate is provided in one of the first flow path and the second flow path, and the guide plate is the storage plate. It is configured to be movable between a position that overlaps the fixed plate as a position and a position that has moved to the other side of the first flow path and the second flow path as the use position. A characteristic vehicle air conditioner. 3. The vehicle air conditioner according to claim 1, wherein a guide accommodating portion that accommodates the guide plate is provided between the heater core and the casing, and the guide plate serves as the accommodating position. The air conditioner for a vehicle, which is configured to be movable between the inside of the guide housing portion and the outside of the guide housing portion as the use position. 4. The vehicle air conditioner according to claim 1, wherein the guide plate has a distal end directed toward a downstream side and is swung in a width direction of the flow path so that the guide plate has the storage position and the use position. An air conditioner for a vehicle, wherein the air conditioner is configured to be movable between the air conditioners.