JPH0471920A - Automotive air conditioner - Google Patents

Abstract

PURPOSE:To enable a temperature difference to be enlarged between upper and lower levels in a cabin at the time of bi-level diffusion mode without causing any increase in the on-board installation space of an air conditioner by providing a continuity passage on a division for separating a defroster diffusion outlet from a side face diffusion outlet, and further providing a selector means. CONSTITUTION:An automotive air conditioner 1 is equipped with a blower unit 2, a cooler unit 3 and a heater unit 4, and this heater unit 4 is provided with a temperature adjustment section 5 and a diffusion outlet selector section 6. The temperature adjustment section 5 has a heater core 51, and air mix dampers 52 and 53. The diffusion outlet selector section 6 has a defroster diffusion outlet 61, a center face diffusion outlet 62, a side face diffusion outlet 63, a foot diffusion outlet 64 and a diffusion air distribution section 7. In this case, the diffusion air distribution section 7 is so constituted as to comprise the first and second air passages 71 and 72, a continuity passage 73, a communication passage 74 and a side face damper 75. This side face damper 75 is operated to open and close the continuity passage 73 and communication passage 74, thereby obtaining a comfortable feeling of heating for keeping the head cool and the feet warm in bi-level diffusion mode.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle air conditioner, and in particular, a defroster outlet, a center face outlet, and a side face outlet are arranged in parallel at the upper part of a casing, and It concerns a heater unit that has a foot outlet at the bottom.

[Prior Art] Conventionally, for example, in automobiles, a defroster outlet, a center face outlet, and a side face outlet are arranged side by side in the upper part of the casing in order to limit the mounting space and to make the device more compact. Some are equipped with an air conditioner that has a foot outlet at the bottom of the casing.

Such air conditioners have two modes: one is a foot blower mode in which hot air is blown from the foot outlet in the passenger compartment to heat the area near the feet of the vehicle occupants during periods when heating is required, such as in the winter; A pie level that simultaneously blows air from the center face outlet, side face outlet, and foot outlet in the vehicle interior at the requested time to increase the difference in temperature between the top and bottom of the vehicle interior, thereby creating a comfortable heated space with a cold head and warm legs. Many of them have a blowout mode.

In addition, when in foot blowing mode, in addition to heating the area around the occupant's feet, the system also de-fogs the front windshield of the vehicle.
Warm air is often blown out from the defroster outlet.

Incidentally, recently, there has been an increasing demand for defogging the side window glass of a vehicle and alleviating cold radiation by blowing hot air from the side face outlet during the foot blowing mode.

[Problems to be Solved by the Invention] However, the outlet temperature of the side face outlet is determined by setting the upper and lower temperature difference in the pie level blowing mode, and the temperature difference in the upper and lower sides in the normal pie level blowing mode is set to 20.
Since the temperature is set between ℃ and 30℃, in this condition, cold air will be blown out from the side face outlet during foot blowing mode, and this will help defog the side windows of the vehicle and M-sum the cold radiation. The problem was that it was not possible.

In addition, in order to solve this problem, when in foot blowing mode,
It is conceivable to communicate the defroster outlet or foot outlet with the side face outlet through bypass piping attached to the outside of the casing, but this method would make the outer shell of the air conditioner larger and require more installation space. There was a problem with not being able to hire people.

The present invention is capable of defogging the side window glass of a vehicle and alleviating cold radiation when in the foot blowout mode without increasing the installation space, and provides a comfortable heated space where the head and feet are warm when the pie level blowout mode is used. The purpose of the present invention is to provide an air conditioner for a vehicle that can obtain the following.

[Means for Solving the Problems] The vehicle air conditioner of the present invention includes a defroster outlet that blows out air toward the slightly oriented window glass of the vehicle, and a defroster outlet that blows air toward the window glass of the vehicle in the third part of the outlet switching section. While looking at the center face outlet, which opens further and blows airflow towards the upper body of the vehicle occupant, and the side face outlet which blows airflow towards the side window glass of the vehicle or the side of the vehicle occupant. , a casing having a foot outlet that blows air toward the feet of the vehicle occupant at a lower part of the outlet switching part; and a heating means for heating the air passing through the casing, the defroster outlet; and a regulating means for adjusting the temperature of air flowing toward the center face outlet, the side face outlet, and the foot outlet, the casing controlling the first air adjusted to a predetermined temperature by the regulating means to the first air. a first ventilation passage that guides the center face outlet and the side face outlet; and a second ventilation passage that guides second air, which has been adjusted to a higher temperature than the first air by the regulating means, to the defroster outlet and the foot outlet. road and
a communication path that is disposed on a partition wall that partitions the defroster outlet and the side face outlet, and communicates the defroster outlet and the side face outlet; and a ventilation path that guides air to the side face outlet. A technical means is adopted that includes a switching means for switching the air flow path to either the first ventilation path or the communication path.

Note that the lateral parts of the vehicle occupant refer to the arms, shoulders, chest, flanks, etc. of the body at the entrance of the vehicle, which are located on the side window glass side of the vehicle.

[Function] (At the time of bi-level Suita mode) When the communication path is switched to the first ventilation path by the switching means, the communication path is closed and the first ventilation path is opened. Therefore, the first air whose temperature is adjusted to a predetermined temperature by the adjustment means is guided to the center face outlet and the side face outlet through the first ventilation passage, and the first air whose temperature is adjusted to a higher temperature than the first air by the adjustment means is guided to the center face outlet and the side face outlet through the first ventilation passage. 2 air is guided to the foot outlet through the second ventilation path.

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

Further, the first air, which has a lower temperature than the second air, is blown out from the center face outlet and the side face outlet toward the side portions and upper body of the vehicle occupant.

Therefore, the temperature difference between the upper and lower sides of the vehicle interior becomes large, and a comfortable heated space with a cold head and warm feet is obtained.

(In the foot blowing mode) When the switching means switches from the first ventilation path to the communication path, the first ventilation path is closed and the communication path is opened. Therefore, the second air whose temperature has been 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 guided to the side face outlet through the communication passage.

Therefore, the second air having a relatively high temperature is blown out from the defroster outlet toward the front window glass of the vehicle.
The air is blown out from the side face outlet toward the side window glass of the vehicle and the side portion of the vehicle occupant, and is blown out from the foot outlet toward the feet of the vehicle occupant.

Therefore, the second air with a relatively high temperature is blown out from the side face outlet, so the difference in temperature between the upper and lower sides of the vehicle interior is reduced, the fogging on the side windows of the vehicle is removed, and the side windows of the vehicle are Cold radiation from window glass is reduced.

[Effects of the Invention] Since a communication path is provided in the partition wall that partitions the defroster outlet and the side face outlet, and a switching means is further provided, the outer shell of the air conditioner can be made smaller than conventional devices. . Therefore, the installation space for the air conditioner on the vehicle can be smaller than that of conventional devices.

In this way, it is possible to increase the temperature difference between the top and bottom of the vehicle interior when in the pie level blowout mode without increasing the installation space in the vehicle, and it also eliminates fogging on the side window glass of the vehicle when in the foot blowout mode. At the same time, it is possible to reduce the cold radiation from the side window glass of the vehicle.

[Example] A vehicle air conditioner according to the present invention will be described based on an example shown in the drawings.

1 to 10 show a first embodiment of the present invention. Fig. 1 shows the air outlet switching section of the heater unit, Fig. 2 shows the air conditioning system for an automobile, Fig. 3 shows the operation panel disposed at the front of the vehicle interior, and Fig. 4 shows the air conditioner. It is a figure which shows the link mechanism which switches a blowing mode.

The automotive air conditioning system 1 includes a blower unit 2, a cooler unit 3, and a heater unit 4.

The blower unit 2 includes a blower 21 that generates airflow toward the interior of the vehicle. The amount of air blown by the blower 21 can be arbitrarily switched by operating the air blower switch lever 11 on the operation panel 10 by the vehicle occupant.

The cooler unit 3 houses 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 adjustment section 5 and an outlet switching section 6 provided in a gauging 41.

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

The heater core 51 is the heating means of the present invention, and is housed within the casing 41, and is supplied with engine cooling water that is dispersed within the overjacket for cooling the engine. This heater core 51 heats the air passing therethrough by exchanging heat with engine cooling water.

The air mix dampers 52 and 53 adjust the ratio of 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 and 53 are set to arbitrary damper positions by the vehicle occupant operating the temperature control lever 12 on the operation panel 10.

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

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

The center face outlet 62 is formed in the upper part of the casing 41. This center face outlet 62 blows out air toward the upper body of the vehicle occupant.

The side face outlet 63 is formed in the upper part of the casing 41. This side face air outlet 63 is connected to the side window glass of the automobile and the side parts of the vehicle occupant (arms, shoulders, and other parts of the body of the vehicle occupant located on the side window glass side of the vehicle).
Blow airflow towards the chest, flanks, etc.

The foot outlet 64 is formed in the lower part of the casing 41. This foot air outlet 64 blows out air toward the feet of the vehicle bundle H.

The opening degrees of the defroster outlet 61, center face outlet 62, and foot outlet 64 are adjusted depending on the damper positions of the defroster damper 65, center face damper 66, and foot damper 67, respectively.

These defroster damper 65, center face damper 66, foot damper 67, and side face damper 75 (described later) are set to any desired damper position by the vehicle occupant operating the blowout mode switching lever 13 on the operation panel 10. The blowout mode switching lever 13 and each damper are connected via a link WA468.

Further, the blown air distribution section 7 is provided with a first air passage 71, a second air passage 72, a communication passage 73, a communication passage 74, and a side face damper 15.

The first ventilation passage 71 is formed on the passenger compartment side of the casing 41 and is an air mix chamber in which warm air that has passed through the heater core 51 and cold air that has bypassed the heater core 51 are mixed. This first ventilation passage 71 is a passage that guides cold air whose temperature has been adjusted to a predetermined temperature by the temperature adjustment section 5 to the center face outlet 62 and the side face outlet 63.

The second ventilation path 72 is formed on the engine room side of the casing 41 and is an air mix chamber in which warm air that has passed through the heater core 51 and cold air that has bypassed the heater core 51 are mixed. This second ventilation passage 72 supplies warm air adjusted to a predetermined temperature by the temperature control unit 5 to the defroster outlet 61.
and a passage leading to the foot outlet 64.

The communication path 13 is connected to the defroster outlet 61 of the casing 41.
A partition wall 69 that partitions the defroster air outlet 61 and the side face air outlet 63 is formed to communicate with the defroster air outlet 61 and the side face air outlet 63.

The communication path 74 is connected to the partition wall 7 that partitions the center face outlet 62 and the side face outlet 63 of the casing 41.
0, the center face outlet 62 and the side face outlet 63 are formed to communicate with each other.

The side face damper 75 is a switching means of the present invention, and opens and closes the communication path 73 and the communication path 74. When set to the A side, the side face damper 75 opens the communication path 13, The communication path 74 is closed.

Moreover, when the side face damper I5 is set to the B side, the communication path 73 is closed and the communication path 74 is opened.

Table 1 shows the damper positions of the defroster damper 65, center face damper 66, foot damper 67, and side 7 eighth damper 75 in each blowout mode.

Table 1 In Table 1, FACE represents the face blowing mode, B/L represents the pie level blowing mode, and FOO
T2 represents the second foot blowing mode, FoOTl represents the first
F/D represents foot/defroster airflow mode, and DEF represents defroster airflow mode.

The operation of the automotive air conditioning system 1 of this embodiment will be explained based on FIGS. 1 to 10.

When a vehicle occupant sets the air blowing amount switching lever 11 provided on the operation panel 10 to, for example, Met, the blower 21 starts operating. Then, the air inside the vehicle or the air outside the vehicle that is sucked into the blower unit 2 by the suction force of the blower 21 flows into the cooler unit 3. The air that has flowed into the cooler unit 3 is cooled by exchanging heat with the refrigerant in the refrigerant evaporator 31 and becomes cold air. This cold air then flows into the heater unit 4. The cold air that has flowed into the heater unit 4 is cooled by air mix dampers 52 and 53 whose damper positions are changed according to the set position of the temperature control lever 12, and passes through the cold air CI and C2 that bypasses the heater core 51 and the heater core 51. The air is divided into warm air H heated to a predetermined temperature.

The flows of these cold air C1, C2 and hot air 11 are
It flows into the ventilation passage 71 and the second ventilation passage 72. At this time, the air in the first ventilation path 71 is low-temperature first air because the cold air C1 flows into most of the first ventilation path 71. On the other hand, the air in the second ventilation path 72 is a second air having a higher temperature than the first air because the cold air C2 and the warm air H flow into the second air passage 72 as a mixture.

(During pie level blowout mode) Then, the vehicle occupant moves the blowout mode switching lever 13 to the pie level blowout mode.
When the level (B/L) blowout mode is set, as shown in FIG. 5 and Table 1, the defroster damper 65 is placed in the fully open position, the center face damper 66 is placed in the intermediate position, and the foot damper 67 is placed in the middle position. The side face damper 75 is arranged at the intermediate position, and the side face damper 75 is arranged at the B open position.

Therefore, the defroster outlet 61 and the communication passage 73 are completely closed. Furthermore, the cold air in the first ventilation passage 11 is blown out from the center face outlet 62 and the side face outlet 63 toward the upper body and side portions of the vehicle occupant.

Furthermore, the warm air in the second ventilation passage 12 is blown out from the foot outlet 64 toward the feet of the vehicle occupant.

As described above, in the pie level blowout mode, as shown in the graph of FIG. 6, there is a temperature difference (for example, 20° C. to 30℃), so you can get a comfortable heating sensation that keeps your head cold and your feet warm.

(At the time of the first foot blowout mode) Then, when the vehicle occupant sets the blowout mode switching lever 13 to the first foot (FOOTI) blowout mode, the defroster damper 65 is disposed in the intermediate position as shown in FIG. 7 and Table 1. The center face damper 66 is placed in the fully closed position, the foot damper 67 is placed in the fully open position, and the side face damper 75 is placed in the A open position.

Therefore, the cold air q1 in the first ventilation path 71 is transferred to the first ventilation path 71 by setting the center face damper 66 to the fully closed state and the side face damper 75 to the A open position (the communication path 74 is fully closed). Since it is closed, it has nowhere to go and flows into the second ventilation passage 12 through the gap between the foot damper 61 and the partition wall 69.The cold air C1 that has flowed into the second ventilation passage 72 is divided into cold air C2 and hot air II. The air in the second ventilation path 72 becomes warm air with a substantially uniform temperature. At this time, from the defroster outlet 61, side face outlet 63, and foot outlet 64, the second
Since the hot air in the ventilation passage 72 is taken out, there is almost no difference in temperature between the respective air outlets, as shown in the graph of FIG.

In this manner, in the first foot blowing mode, the hot air blown from the side face blowing outlet 63 to the side window glass of the automobile can be used to prevent fogging of the side window glass and to alleviate cold radiation. .

Therefore, it is possible to increase the temperature difference between the upper and lower sides of the vehicle interior during the pie level Suita mode, and to reduce the temperature difference between the upper and lower interiors of the vehicle interior during the first foot blowout mode. In order to obtain such an effect, a communication passage 73 that serves as a hot air bypass is formed in the partition wall 69, so that the outer shell of the heater unit 4 can be made smaller, and the mounting space for the heater unit 4 in an automobile can be reduced compared to the conventional one. It also has the advantage that it can be made smaller than the device.

(In the second foot blowout mode) When the vehicle occupant sets the blowout mode switching lever 13 to the second foot (FOOT2) blowout mode, the defroster damper 65 is placed in the intermediate position as shown in FIG. 9 and Table 1. The center face damper 66 is placed at the intermediate position, the foot damper 67 is placed at the intermediate position, and the side face damper 75 is placed at the A side position (with the communication path 74 fully closed).

Therefore, in addition to the effect in the first foot blowing mode, the cold air C1 in the first ventilation passage 71 is blown out from the center face outlet 62 toward the upper body of the vehicle occupant. Therefore, as shown in the graph of FIG. 10, the air outlet temperature of the center face air outlet 62 is lower than the air outlet temperature of the side face air outlet 63, making it possible to prevent hot flashes on the vehicle occupant's face.

In addition, in the face (FACE) blowing mode, cold air is blown out from the side face blowing outlet 63 in the same way as in the pie level blowing mode, and in the foot differential (F/D) blowing mode and the defroster (DEF) blowing mode, Warm air is blown out from the side face outlet 63 in the same way as in the foot blowing mode.

11 to 14 show a second embodiment of the present invention.

FIG. 11 and FIG. 12 are diagrams showing the heater unit.

In the first embodiment, the air mix damper 5 of the temperature adjustment section 5
2. When the damper position of 53 is changed, the outlet temperature of each outlet changes. For this reason, temperature control lever 1
If the setting position 2 is set to Max Hoj, all the air flowing into the first ventilation path 71 will pass through the heater core 51, and even if it is in the second foot blowing mode, it will not flow from the center face blowing outlet 62. Cold air is not blown out, making it impossible to prevent hot flashes on the vehicle occupants' faces.

Therefore, in this embodiment, a hole 91 is formed in the cold air flow part of the temperature control part 5 on the passenger compartment side, and a cold air bypass passage 92 is formed to guide the cold air C3 flowing out from the hole 91 to the center face outlet 62. It is set up.

Furthermore, an opening/closing damper 93 is disposed within the cold air bypass passage 92 to close the cold air bypass passage 92 when the cold air C3 is not required. As shown in FIG. 13, this opening/closing damper 93 opens and closes the cold air bypass passage 92 by the vehicle occupant operating the cold air bypass opening/closing lever 14 without interlocking with the temperature control lever 12 and the blowout mode switching lever 13. It is something.

The specific operation of this embodiment will be explained.

During winter heating, the warm air blown from the defroster outlet 61 may hit the vehicle occupants' faces, making them uncomfortable.

In such a case, when the vehicle occupant sets the cold air bypass opening lever 14 to the open position, the cold air C3 flows into the cold air bypass passage 92 from the hole 91.

The cold air C3 flowing into the cold air bypass passage 92 is
1 from the center face air outlet 62 for vehicle occupants. It is blown out towards half of the body. Since this cold air C3 is taken in from the upstream side of the air mix damper 52, even if the setting position of the temperature control lever 12 is set to Max Hot in the second foot blowing mode, the cold air C3 is taken in from the upstream side of the air mix damper 52.
As shown in the graph of Figure 4, the center face outlet 62
There is no change in the air outlet temperature of the vehicle. Therefore, hot flashes on the face of the vehicle occupant i can be prevented.

(Modified example) In this embodiment, a refrigerant evaporator of a refrigeration cycle according to the present invention is disposed in a ventilation duct to provide an air conditioning/heating device, but the refrigeration cycle may be abolished to provide a heating device.

In this example, a heater core was used as the heating means, but
As the heating means, a refrigerant condenser of a refrigeration cycle, an electric heater, etc. may be used.

In this embodiment, two air mix dampers with oscillating motion are used as adjustment means, and the temperature is controlled by a three-layer flow with two cold air passages and one hot air passage. Temperature control may be performed using a two-layer flow with one hot air passage (on the first ventilation passage side) and one hot air passage (on the second ventilation passage side).Other adjustment means include a reciprocating damper, a heater core (heating A device that rotates the device (means) about a fulcrum may also be used.

Further, the present invention may be employed in an autonia conditioner.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 10 show a first embodiment of the present invention. Figure 1 is a schematic diagram of the air outlet switching section of the heater unit, Figure 2 is a schematic diagram of an automotive air conditioning system, Figure 3 is a front view of the operation panel, and Figure 4 is a heater unit showing the link mechanism for switching the air outlet mode. FIG. 3 is a side view of the unit. Figure 5 is a schematic diagram of the heater unit showing the temperature position 1 in pie level blowout mode, and Figure 6 is the relationship between the outlet temperature of each outlet and the set position of the temperature control lever in pie level blowout mode. 7 is a schematic diagram of the heater unit showing the tamper position 1 in the 1st foot blowing mode, and 8 is a graph showing the 1st foot blowing mode.
Graph showing the relationship between the outlet temperature of each outlet and the set position of the temperature control lever in the foot outlet mode, No. 9
The figure is a schematic diagram of the output unit showing the temperature control position 1 in the second foot outlet mode, and Figure 10 is the relationship between the outlet temperature of each outlet and the set position of the temperature control lever in the second foot outlet mode. This is a graph representing 11 to 14 show a second embodiment of the present invention. Figures 11 and 12 are schematic diagrams of the heater unit, Figure 13 is a front view of the operation panel, and Figure 14 shows the outlet temperature of each outlet and the setting position of the temperature control lever in the first foot outlet mode. This is a graph showing the relationship between 1 in the diagram...Car heating and cooling system! (IE dual use air conditioner)
5... Temperature adjustment section (adjustment means) 6... Outlet switching section 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.
...First ventilation path 12...Second ventilation path 73...Communication path 75...Side face damper (switching means) 1N3r1! J

Claims (1)

[Scope of Claims] 1) A defroster outlet that blows air toward the front window glass of the vehicle is installed in the upper part of the outlet switching unit, and a defroster outlet that opens from the center of the vehicle interior and causes air to flow toward the upper body of the vehicle occupant. It has a center face outlet that blows out airflow, and a side face outlet that blows out air toward the side window glass of the vehicle or the side of the vehicle occupant, and has a center face outlet that blows out airflow toward the side window glass of the vehicle or the side of the vehicle occupant. a casing having a foot outlet for blowing air toward the casing; and a heating means for heating air passing through the casing, the defroster outlet, the center face outlet, the side face outlet, and the foot outlet. and a regulating means for regulating the temperature of air heading toward the outlet, the casing comprising: a first ventilation unit that guides the first air, which has been adjusted to a predetermined temperature by the regulating means, to the center face outlet and the side face outlet. a second air passage that guides second air adjusted to a higher temperature than the first air by the regulating means to the defroster outlet and the foot outlet; and the defroster outlet and the side face outlet. a communication path that is disposed on a partitioning wall and communicates the defroster outlet and the side face outlet; and a ventilation path that guides air to the side face outlet between the first ventilation path and the communication path. 1. A vehicle air conditioner, comprising: switching means for switching between the two modes.