JP2897359B2 - Vehicle air conditioner - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner for a vehicle, in which a defroster outlet, a center face outlet, and a side face outlet are juxtaposed at an upper part of a casing to form a casing. It involves a heater unit having a foot outlet at the bottom.

[Prior art] Conventionally, for example, in an automobile, a defroster outlet, a center face outlet and a side face outlet are juxtaposed at an upper portion of a casing for the purpose of restricting a mounting space and reducing the size of the device. Some air conditioners have a foot outlet at the lower part of a casing.

In such an air conditioner, a foot blowing mode in which a warm air is blown out from a foot outlet in a vehicle cabin to heat the vicinity of a vehicle occupant's feet at a time when heating is requested in winter or the like, and an intermediate temperature is set in spring and fall. A bi-level that provides a comfortable heating space for head and foot heat by blowing out air from the center face outlet, side face outlet, and foot outlet simultaneously in the cabin at the required time to increase the vertical temperature difference in the cabin. In many cases, a blowing mode is set.

In the foot blowing mode, in addition to heating near the feet of the occupant, warm air is often blown from the defroster outlet in order to remove fogging of the front window glass of the vehicle.

By the way, recently, there is an increasing demand to remove fogging of the side window glass of the vehicle and to reduce cold radiation by blowing hot air from the side face outlet in the foot blowing mode.

[Problems to be Solved by the Invention] However, the outlet temperature of the side face outlet is determined by the setting of the upper and lower temperature difference in the bi-level outlet mode.
In this state, cold air blows out from the side face outlets in the foot blowing mode from the setting of -30 ° C to 30 ° C, which can remove fogging of the side window glass of the vehicle and reduce cold radiation. There was a problem that could not be done.

In order to solve this problem, it is conceivable to connect the defroster outlet or the foot outlet to the side face outlet by a bypass pipe attached to the outside of the casing in the foot outlet mode. There was a problem that it could not be used because the outer shell of the harmony device became large and the mounting space increased.

INDUSTRIAL APPLICABILITY The present invention can remove fogging of the side window glass of the vehicle in the foot blowing mode and reduce cold radiation without increasing the mounting space, and can provide a comfortable heating space for head and foot heat in the bi-level blowing mode. It is an object of the present invention to provide a vehicle air conditioner capable of obtaining the above.

[Means for Solving the Problems] A vehicle air conditioner according to the present invention comprises: a defroster outlet for blowing air toward a front window glass of a vehicle; A center face outlet for blowing air toward the upper body of the vehicle occupant; and a side face outlet for blowing air toward the side window of the vehicle or the side of the vehicle occupant. A casing having a foot outlet at a lower portion of the switching portion for blowing an air flow toward a foot of a vehicle occupant; heating means for heating air passing through the casing; the defroster outlet and the center face Adjusting means for adjusting the temperature of air directed to an outlet, the side face outlet and the foot outlet, and the casing comprises: A first ventilation path for guiding the first air adjusted to a predetermined temperature by the joint means to the center face outlet and the side face outlet, and a second air path adjusted to a higher temperature than the first air by the adjusting means. A second ventilation path that guides air to the defroster outlet and the foot outlet, and is provided on a partition wall that partitions the defroster outlet and the side face outlet, and the defroster outlet and the side face outlet And a switching means for switching a ventilation path for guiding air to the side face outlet to one of the first ventilation path and the communication path.

In addition, the side part of the vehicle occupant refers to an arm, a shoulder, a chest, a side flank, etc. of the body of the vehicle occupant located on the side window glass side of the vehicle.

[Operation] (During the bi-level blowing mode) When the switching means switches the communication path to the first ventilation path, the communication path is closed and the first ventilation path is opened. Therefore, the first air adjusted to the predetermined temperature by the adjusting means is guided to the center face outlet and the side face outlet through the first ventilation path, and the first air adjusted to a higher temperature than the first air by the adjusting means. The 2 air is guided to the foot outlet through the second ventilation path.

Therefore, the second air having a higher temperature than the first air is blown out from the foot outlet toward the feet of the vehicle occupant.

The first air having a lower temperature than the second air is blown from the center face outlet and the side face outlet toward the side and upper body of the vehicle occupant.

Therefore, the difference between the upper and lower temperatures in the vehicle compartment becomes large, and a comfortable heating space with head and foot heat is obtained.

(At the time of the foot blowing mode) When the first ventilation path is switched to the communication path by the switching means, the first ventilation path is closed and the communication path is opened. Therefore, the second air adjusted to a predetermined temperature by the adjusting means is guided to the defroster outlet and the foot outlet through the second ventilation passage, and further to the side face outlet through the communication passage.

For this reason, the second air having a relatively high temperature is blown out from the defroster outlet toward the front window glass of the vehicle, and from the side face outlet toward the side window glass of the vehicle and the side portion of the vehicle occupant. While being blown out,
It is blown out from the foot outlet toward the foot of the vehicle occupant.

Accordingly, the relatively high-temperature second air is blown out from the side face outlet, so that the vertical temperature difference in the vehicle compartment is reduced, the fogging of the side window glass of the vehicle is removed, and the side of the vehicle is removed The cold radiation of the window glass is reduced.

[Effect of the Invention] Since the communication path is provided on the partition wall that separates the defroster outlet and the side face outlet, and the switching means is further provided, the outer shell of the air conditioner can be made smaller than the conventional device. . For this reason, the space for mounting the air conditioner on the vehicle can be made smaller than that of the conventional device.

As described above, the vertical temperature difference in the vehicle cabin can be increased in the high-level blowing mode without increasing the mounting space for the vehicle, and the fogging of the side window glass of the vehicle can be removed in the foot blowing mode. It is possible to reduce cold radiation of the side window glass of the vehicle.

Embodiment An air conditioner for a vehicle according to the present invention will be described based on an embodiment shown in the drawings.

1 to 10 show a first embodiment of the present invention. FIG. 1 is a view showing an air outlet switching portion of a heater unit, FIG. 2 is a view showing a vehicle air conditioner, FIG. 3 is a view showing an operation panel disposed on a front surface in a vehicle interior, and FIG. It is a figure which shows the link mechanism which switches a blowing mode.

The automotive cooling and heating device 1 includes a blower unit 2, a cooler unit 3, and a heater unit 4.

The blower unit 2 has a blower 21 that generates an airflow toward the vehicle interior. The switching of the blowing amount by the blower 21 can be arbitrarily switched by operating the blowing amount switching lever 11 of the operation panel 10 by the vehicle occupant.

The cooler unit 3 has a refrigerant evaporator 31 of the refrigeration cycle.

The refrigerant evaporator 31 cools the air by exchanging heat between the air passing through the cooler unit 3 and the refrigerant flowing therein.

The heater unit 4 includes a temperature control unit 5 and an air outlet switching unit 6 provided in the casing 41.

The temperature control unit 5 is a control unit of the present invention, and includes a heater core 51 and air mix dampers 52 and 53.

The heater core 51 is a heating means of the present invention, and is accommodated in the casing 41, and is supplied with engine cooling water warmed in an engine cooling water jacket.
The heater core 51 heats the passing air by exchanging heat with engine cooling water.

The air mix dampers 52 and 53 adjust the ratio between the amount of air passing through the heater core 51 and the amount of air bypassing the heater core 51. These air mix dampers 52, 53
Is set to an arbitrary damper position by operating the temperature control lever 12 of the operation panel 10 by the vehicle occupant.

The outlet switching unit 6 includes a defroster outlet 61, a center face outlet 62, a side face outlet 63, and a foot outlet.
64 and an outlet air distribution section 7.

The defroster outlet 61 is formed in an upper part of the casing 41. The defroster outlet 61 blows out the airflow toward the front window glass of the automobile.

The center face outlet 62 is formed at an upper portion of the casing 41. The center face outlet 62 blows out the airflow toward the upper body of the vehicle occupant.

The side face outlet 63 is formed at an upper portion of the casing 41. The side face outlet 63 is directed toward the side window glass of the automobile and the side portion of the vehicle occupant (arms, shoulders, chests, flank, etc. of the body of the vehicle occupant located on the side window glass side of the vehicle). Blow out the air stream.

The foot outlet 64 is formed below the casing 41. The foot outlet 64 blows out the airflow toward the feet of the vehicle occupant.

The defroster outlet 61, center face outlet 62 and foot outlet 64 are connected to the defroster damper 6
5. The degree of opening is adjusted according to the damper positions of the center face damper 66 and the foot damper 67.

These defroster dampers 65 and center face dampers
The 66, the foot damper 67, and the side face damper 75 described later are set to arbitrary damper positions by operating the blowout mode switching lever 13 of the operation panel 10 by a vehicle occupant. The blowing mode switching lever 13 and each damper are connected via a link mechanism 68.

The blow-off air distribution unit 7 includes a first ventilation path 71, a second ventilation path 72, a communication path 73, a communication path 74, and a side face damper.
75 are arranged.

The first ventilation path 71 is an air mixing chamber formed on the vehicle interior side of the casing 41 and mixing the hot air that has passed through the heater core 51 and the cool air that has bypassed the heater core 51. The first ventilation passage 71 is a passage that guides the cool air adjusted to a predetermined temperature by the temperature adjustment unit 5 to the center face outlet 62 and the side face outlet 63.

The second ventilation passage 72 is formed on the engine room side of the casing 41, and the warm air that has passed through the heater core 51 and the heater core 51
This is an air mix chamber where the cool air bypassing the air mixes. The second ventilation path 72 is a path that guides the warm air adjusted to a predetermined temperature by the temperature controller 5 to the defroster outlet 61 and the foot outlet 64.

The communication passage 73 is formed so as to communicate the defroster outlet 61 and the side face outlet 63 with a partition wall 69 that separates the defroster outlet 61 and the side face outlet 63 of the casing 41.

The communication path 74 is connected to the center face outlet 62 of the casing 41.
The center face outlet 62 and the side face outlet 63 are formed so as to communicate with a partition wall 70 that separates the center face outlet 63 from the center face outlet 63.

The side face damper 75 is a switching means of the present invention, and opens and closes the communication path 73 and opens and closes the communication path 74. When the side face damper 75 is set on the A side, the communication passage 73
And close the connection 74. When the side face damper 75 is set to the B side, the communication path 73 is closed, and the communication path 74 is closed.
open.

Table 1 shows the damper positions of the defroster damper 65, the center face damper 66, the foot damper 67, and the side face damper 75 in each blowing mode.

In Table 1, FACE represents the face blowing mode, B / L represents the bi-level blowing mode, and FOOT2 represents the second blowing mode.
FOOT1 represents the first foot blowing mode, F / D represents the foot differential blowing mode, and DEF represents the defroster blowing mode.

The operation of the automotive air conditioner 1 of this embodiment will be described with reference to FIGS.

When the vehicle occupant sets the air volume switching lever 11 provided on the operation panel 10 to, for example, Me1, the blower 21 starts operating. Then, the vehicle interior air or the vehicle exterior air sucked into the blower unit 2 by the suction force of the blower 21 is:
It flows into the cooler unit 3. The air that has flowed into the cooler unit 3 exchanges heat with the refrigerant in the refrigerant evaporator 31 and is cooled to become cool air. This cool air then flows into the heater unit 4. The cool air flowing into the heater unit 4 is cooled by the air mix dampers 52 and 53 whose damper positions are changed according to the set position of the temperature control lever 12, and the cool air C1 and C2 that bypass the heater core 51 and the heater core.
It passes through 51 and is distributed to the warm air H heated to a predetermined temperature.

The flows of the cold air C1, C2 and the hot air H flow into the first ventilation path 71 and the second ventilation path 72. At this time, the air in the first ventilation path 71 is low-temperature first air because the cool air C1 flows into most of the first ventilation path 71.
On the other hand, the air in the second ventilation passage 72 is a second air having a higher temperature than the first air because the cold air C2 and the hot air H are mixed and flow.

(At the time of the bi-level blowing mode) The vehicle occupant sets the blowing mode switching lever 13 to the bi-level blowing mode.
When the level (B / L) blowing mode is set, as shown in FIG. 5 and Table 1, the defroster damper 65 is disposed at the fully closed position, the center face damper 66 is disposed at the intermediate position, and the foot damper 67 is disposed. Are arranged at the intermediate position, and the side face damper 75 is arranged at the B side position.

Therefore, the defroster outlet 61 and the communication passage 73 are fully closed. Further, the cool air in the first ventilation path 71 is blown from the center face outlet 62 and the side face outlet 63 toward the upper body and side portions of the vehicle occupant. further,
The temperature in the second ventilation path 72 is blown out from the foot outlet 64 toward the feet of the vehicle occupant.

Thus, in the bi-level blowing mode, as shown in the graph of FIG. 6, the temperature difference between the outlet temperature of the side face outlet 63 and the outlet temperature of the foot outlet 64 (for example, 20 ° C. 30 ° C), so you can get a comfortable feeling of heating with head and foot heat.

(At the time of the first foot blowing mode) When the vehicle occupant sets the blowing mode switching lever 13 to the first foot (FOOT1) blowing mode, the defroster damper 65 is arranged at the intermediate position as shown in FIG. Then, the center face damper 66 is arranged at the fully closed position, the foot damper 67 is arranged at the fully open position, and the side face damper 75 is arranged at the A side position.

For this reason, the cold air C1 in the first ventilation path 71 is generated by setting the center face damper 66 to the fully closed state and setting the side face damper 75 to the A side position (the communication path 74 to the fully closed state). Is closed, the place to go is eliminated, and the air flows into the second ventilation path 72 from the gap between the foot damper 67 and the partition wall 69. Then, the cold air C1 flowing into the second ventilation path 72
Is mixed with the cold air C2 and the hot air H, so that the temperature of the air in the second ventilation path 72 becomes substantially uniform. At this time, warm air in the second air passage 72 is taken out from the defroster outlet 61, the side face outlet 63, and the foot outlet 64, and as shown in the graph of FIG. The temperature difference between the outlet temperatures at the outlet is almost eliminated.

As described above, in the first foot blowout mode, the hot air blown from the side face outlet 63 to the side window glass of the vehicle can be used to prevent fogging of the side window glass and reduce cold radiation.

Therefore, the vertical temperature difference in the vehicle compartment can be increased in the bi-level blowing mode, and the vertical temperature difference in the vehicle compartment can be reduced in the first foot blowing mode. In order to obtain such an effect, since the communication passage 73 serving as a hot air bypass is formed in the partition wall 69, the outer shell of the heater unit 4 can be made small, and the heater unit 4 for an automobile can be provided.
There is also obtained an effect that the mounting space of the device can be made smaller than the conventional device.

(At the time of the second foot blowing mode) When the vehicle occupant sets the blowing mode switching lever 13 to the second foot (FOOT2) blowing mode, the defroster damper 65 is located at the intermediate position as shown in FIG. The center face damper 66 is arranged at an intermediate position, the foot damper 67 is arranged at an intermediate position,
75 is disposed at the A side position (the communication path 74 is fully closed).

Therefore, in addition to the effect of the first foot blowing mode,
The cool air C1 in the first ventilation path 71 is blown from the center face outlet 62 toward the upper body of the vehicle occupant. Therefore,
As shown in the graph of FIG. 10, since the outlet temperature of the center face outlet 62 is lower than the outlet temperature of the side face outlet 63, it is possible to prevent hot flashing of the face of the vehicle occupant.

In the face (FACE) blowing mode, cold air is blown from the side face outlet 63 in the same manner as in the bi-level blowing mode, and in the foot differential (F / D) blowing mode and the defroster (DEF) blowing mode, Hot air blows out from the side face outlet 63 in the same manner as in the foot blowing mode.

FIGS. 11 to 14 show a second embodiment of the present invention. No.
11 and 12 are views showing a heater unit.

In the first embodiment, the air mix damper of the temperature controller 5
When the damper positions of 52 and 53 are changed, the outlet temperature of each outlet changes. Therefore, if the setting position of the temperature control lever 12 is set to Max Hot, all the air flowing into the first ventilation path 71 passes through the heater core 51, and even in the second foot blowing mode. Cold air is not blown out from the center face outlet 62, so that it is not possible to prevent hot flashes of the vehicle occupant's face.

Therefore, in this embodiment, a hole 91 is formed in the cool air inflow section on the vehicle cabin side of the temperature control section 5, and a cool air bypass passage 92 for guiding the cool air C3 flowing out of the hole 91 to the center face outlet 62 is provided. ing. When the cool air C3 is unnecessary, the cool air bypass passage 92 is provided in the cool air bypass passage 92.
An opening / closing damper 93 for closing the door is provided. As shown in FIG. 13, the opening / closing damper 93 opens and closes the cold air bypass passage 92 by operating the cold air bypass opening / closing lever 14 by the vehicle occupant without interlocking with the temperature control lever 12 and the blowing mode switching lever 13. Things.

 The specific operation of this embodiment will be described.

During heating in winter, the warm air blown out from the defroster outlet 61 may hit the face of the vehicle occupant and become uncomfortable.
In such a case, the vehicle occupant can use the cold air bypass
When 14 is set to the open position, the cool air C3 flows into the cool air bypass passage 92 from the hole 91. Then, the cool air C3 flowing into the cool air bypass passage 92 is blown out from the center face outlet 62 toward the upper body of the vehicle occupant. Because this cold air C3 is taken in from the upstream side of the air mix damper 52,
Even when the setting position of the temperature control lever 12 is set to Max Hot in the second foot blowing mode, the outlet temperature of the center face outlet 62 does not change as shown in the graph of FIG. Therefore, it is possible to prevent hot flashes of the vehicle occupant's face.

(Modification) In the present embodiment, the refrigerant evaporator of the refrigeration cycle is disposed in the ventilation duct of the present invention to provide a cooling and heating device.

In the present embodiment, the heater core is used as the heating means, but a refrigerant condenser of a refrigeration cycle, an electric heater, or the like may be used as the heating means.

In the present embodiment, two oscillating air mix dampers are used as the adjusting means, and the temperature is adjusted by three laminar flows as two cold air passages and one temperature passage. 1 place (1st ventilation path side)
The temperature may be adjusted by a two-layer flow in one hot air passage (on the side of the second air passage). Further, a damper that reciprocates or a device that rotates a heater core (heating means) about a fulcrum may be used as other adjusting means.

Further, the present invention may be applied to an automatic air conditioner.

[Brief description of the drawings]

1 to 10 show a first embodiment of the present invention. First
FIG. 2 is a schematic diagram of an air outlet switching unit of the heater unit, FIG. 2 is a schematic diagram of a vehicle air conditioner, FIG. 3 is a front view of an operation panel, and FIG. It is a side view. FIG. 5 is a schematic view of the heater unit showing the tamper position in the bi-level blowing mode, and FIG. 6 shows the relationship between the outlet temperature of each outlet and the setting position of the temperature control lever in the bi-level blowing mode. FIG. 7 is a schematic diagram of the heater unit showing the tamper position in the first foot blowing mode, and FIG. 8 is a diagram showing the outlet temperature of each outlet and the setting position of the temperature control lever in the first foot blowing mode. FIG. 9 is a schematic diagram of the heater unit showing the tamper position in the second foot blowing mode, and FIG. 10 is a diagram showing the outlet temperature of each outlet and the temperature control lever in the second foot blowing mode. It is a graph showing the relationship with a setting position. FIGS. 11 to 14 show a second embodiment of the present invention. Eleventh
FIGS. 12 and 13 are schematic diagrams of the heater unit, FIG. 13 is a front view of the operation panel, and FIG. 14 is a relationship between the outlet temperature of each outlet and the set position of the temperature control lever in the first foot outlet mode. It is a graph showing. In the drawing, 1 ... automatic air conditioning / heating device (air conditioner for vehicle) 5 ... temperature control unit (adjustment means), 6 ... outlet switching unit,
41 ... casing, 51 ... heater core (heating means) 61 ... defroster outlet, 62 ... center face outlet, 63 ... side face outlet, 64 ... foot outlet, 69 ... partition wall, 71 ... 1st ventilation path, 72 ... 2nd ventilation path, 73 ... communication path, 75 ... side face damper (switching means)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60H 1/00 102

Claims (1)

(57) [Claims] 1. A defroster outlet for blowing air toward a front window glass of a vehicle, and a center opening above the center of a passenger compartment for blowing air toward an upper body of a vehicle occupant. A face outlet, and a side face outlet that blows out an airflow toward a side window glass of the vehicle or a side portion of the vehicle occupant; A casing having a foot outlet for blowing out a flow; and a heating means for heating air passing through the casing, and heading toward the defroster outlet, the center face outlet, the side face outlet, and the foot outlet. Adjusting means for adjusting the temperature of the air, wherein the casing is configured to transfer the first air adjusted to a predetermined temperature by the adjusting means. A first air passage leading to the center face outlet and the side face outlet, and a second air guide leading the second air adjusted to a higher temperature than the first air by the adjusting means to the defroster outlet and the foot outlet. A ventilation path, a communication path disposed on a partition wall that partitions the defroster outlet and the side face outlet, and communicating with the defroster outlet and the side face outlet, air is supplied to the side face outlet. Switching means for switching the ventilation path that guides the air flow to one of the first ventilation path and the communication path.