JP2023160023A - Vehicular air conditioner - Google Patents

Abstract

To improve space efficiency in arranging a door-link mechanism and an actuator that drives the door-link mechanism, outside an air conditioning case.SOLUTION: A vehicular air conditioner comprises an air conditioning case, a door-link mechanism that switches a door in the air conditioning case in accordance with an operation mode, and an actuator that drives the door-link mechanism, where the door-link mechanism and the actuator are arranged on an outer side surface of the air conditioning case. The door-link mechanism comprises a door lever that rotates a door shaft of the door, and a cam link that rotates the door lever by rotation of a main cam pivotally supported on the air conditioning case. The actuator comprises a driving rod that is rotationally driven with a base end side thereof as a center by engagement of a tip part thereof with a connection groove of the main cam. The door-link mechanism and the actuator are arranged on different outer surfaces of the air conditioning case.SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle air conditioner.

A vehicle air conditioner includes an air conditioning unit called HVAC (Heating, Ventilation, and Air Conditioning). This air conditioning unit is equipped with an air blower, a heat exchanger (evaporator or heater core), an air mix door, etc., and the air introduced into the unit by the blower is heated or cooled and blown out into the vehicle interior.

In such a vehicle air conditioner, a door link mechanism is placed on the outer surface of the air conditioning case in order to control the operation of the door inside the case of the air conditioning unit (air conditioning case) according to the selection of the outlet switching mode. ing. A door link mechanism is known that has a sliding link that has a door lever and a cam groove that engages with an engagement pin of the door lever, and that is provided with a driving force in the sliding direction by a door actuator (see Patent Document 1 below). reference).

Japanese Patent Application Publication No. 2008-110721

According to the conventional technology described above, the door lever of the door link mechanism and the door actuator are arranged on one side of the outside of the air conditioning case, so it is necessary to secure space for arranging these on the outside of the air conditioning case. become. On the other hand, in a vehicle air conditioner, the air conditioning case is placed in a narrow space such as in front of the driver's seat or under the seat, so it is difficult to secure a large space around the air conditioning case. Therefore, when installing the door link mechanism and the actuator that drives it outside the air conditioning case, it is required to minimize the installation space.

In addition, when the door link mechanism is used in the intake mechanism of a two-layer vehicle air conditioner, the two intake doors are set to an inside air introduction mode in which both the inside air side is opened and the outside air side is closed. Switch to three operating modes: an outside air introduction mode where both sides close the inside air side and open the outside air side, and a two-layer mode where one side opens the inside air side and closes the outside air side, and the other side closes the inside air side and opens the outside air side. is required. In order to accommodate these three operating modes, it is necessary to increase the operating range of the door link mechanism, but in situations where it is difficult to secure a large space around the air conditioning case, it is necessary to increase the operating range of the door link mechanism. It is required to widen the operating range of the door link mechanism.

The present invention aims to deal with such circumstances. In other words, the goal is to save space when arranging the door link mechanism and the actuator that drives it outside the air conditioning case, to increase the operating range of the door link mechanism relative to the operating range of the actuator, and to create a two-layer system. An object of the present invention is to provide a space-efficient mechanism that can accommodate the operation modes of an intake door in a vehicle air conditioner.

In order to solve such problems, the present invention includes the following configuration.
The air conditioning case includes an air conditioning case, a door link mechanism that switches a door in the air conditioning case according to an operation mode, and an actuator that drives the door link mechanism, and the door link mechanism and the actuator are arranged on an outer surface of the air conditioning case. In the vehicle air conditioner, the door link mechanism includes a door lever that rotates a door shaft of the door, and a cam link that rotates the door lever by rotation of a main cam pivotally supported by the air conditioning case, includes a drive rod whose tip engages with the connection groove of the main cam and is driven to rotate around the base end, and the door link mechanism and the actuator are installed on different outer surfaces of the air conditioning case. A vehicle air conditioner characterized by:

According to the present invention having such characteristics, it is possible to save space when arranging the door link mechanism and the actuator for driving the door link mechanism outside the air conditioning case in the vehicle air conditioner. Furthermore, the operating range of the door link mechanism is made larger than the operating range of the actuator, and a space-efficient mechanism that can accommodate the operating mode of the intake door in a two-layer vehicle air conditioner can be provided.

1 is an explanatory diagram (side view) showing the overall configuration of a vehicle air conditioner according to an embodiment of the present invention. 1 is an explanatory diagram (plan view) showing the overall configuration of a vehicle air conditioner according to an embodiment of the present invention. Explanatory diagram (cross-sectional view) of the air introduction part. An explanatory diagram (plan view) of the door link mechanism, the actuator, and the operation mode (inside air introduction mode) of the intake door. An explanatory diagram (plan view) of the door link mechanism, actuator, and operation mode (outside air introduction mode) of the intake door. An explanatory diagram (plan view) of the operation mode (two-layer mode) of the door link mechanism, actuator, and intake door. An explanatory diagram (side view) of a door link mechanism and an actuator. FIG. 2 is an explanatory diagram illustrating the state of the vehicle air conditioner during maintenance.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same reference numerals in different figures indicate parts with the same function, and redundant explanation in each figure will be omitted as appropriate.

As shown in FIGS. 1 and 2, the vehicle air conditioner 1 includes an air introduction section 1A and a temperature control blower section 1B for an air conditioning case 100. The air introduction section 1A includes an outside air intake port 2. and inside air intake ports 3 (3A, 3B) are provided, and the temperature control blowing section 1B is provided with a first blowing section 4, a second blowing section 5, and a third blowing section 6. Here, the first air outlet 4 is, for example, a defroster air outlet, the second air outlet 5 is, for example, a face air outlet, and the third air outlet 6 is, for example, a foot air outlet 6A, a rear seat air outlet, etc. These include a foot air outlet 6B, a rear seat face air outlet 6C, and the like.

The air introduction section 1A includes therein a blower section 10 and a drive section (motor) 11 that constitute a blower. The blower section 10 is driven by a drive section 11 and includes a two-layer first blower section 10A and a second blower section 10B that are coaxially rotated by a drive shaft 11A of the drive section 11. Further, in the air introduction section 1A, a suction port 12 of the first blowing section 10A and a suction port 13 of the second blowing section 10B open in opposite directions along the drive shaft 11A.

Furthermore, the air introduction section 1A includes intake cases 20 and 21. The intake cases 20 and 21 are provided so as to respectively cover the pair of intake ports 12 and 13 in the ventilation section 10 (the first ventilation section 10A and the second ventilation section 10B), and one intake case 20 has an internal air intake port 3A. The other intake case 21 is provided with an inside air intake port 3B. An outside air intake port 2 is provided so as to straddle the two intake cases 20 and 21. When mounted on a vehicle, the outside air intake port 2 is provided so as to open toward the front side of the vehicle, and the two inside air intake ports 3A and 3B are provided so as to open toward the left and right sides in the width direction of the vehicle.

In the air introduction section 1A, an intake door 22 is provided inside the intake case 20, and an intake door 23 is provided inside the intake case 21. The pair of intake doors 22, 23 are rotary dampers, each having a rotating shaft 22A, 23A, and rotate in one direction around the rotating shafts 22A, 23A to close the outside air intake port 2 and open the inside air intake port 3A. , 3B, and by rotating in the other direction around the rotating shafts 22A, 23A, the outside air intake port 2 is opened and the inside air intake ports 3A, 3B are closed.

In the state shown in FIG. 3, the intake doors 22 and 23 are in a state where the shielding parts 22B and 23B of the intake doors 22 and 23 block the inside air intake ports 3A and 3B, and the inside air intake ports 3A and 3B are closed. The air taken in from the outside air intake port 2 through the inside of the intake doors 22 and 23 is drawn into the suction ports 12 and 13, thereby creating an outside air introduction state in which the outside air intake port 2 is opened.

The temperature control blower section 1B includes a partition wall 110 that partitions the inside of the air conditioning case 100 into a first region 111 and a second region 112. The temperature control air blower 1B includes a filter 120 that purifies the air passing through the first area 111 and the second area 112, and a filter 120 that purifies the air passing through the first area 111 and the second area 112 so as to straddle the partition wall 110. It includes a first heat exchange section (cooler) 121 for cooling, and a second heat exchange section (heater) 122 for heating the air passing through the first region 111 and the second region 112.

Inside the air conditioning case 100 of the temperature control blower section 1B, the above-mentioned blow-off sections (first blow-off section 4, second blow-off section 5, third blow-off section 6) pass through the first region 111 or the second region 112. A ventilation flow path is formed in the first region 111, and a first air mix door 111A is provided in the first region 111, and a second air mix door 112A is provided in the second region 112.

The above-mentioned air outlet includes a first door 4A that opens and closes the first air outlet 4, a second door 5A that opens and closes the second air outlet 5, and a wind direction switch that switches the wind direction of the foot air outlet 6A in the third air outlet 6. It is equipped with a door 60.

The flow of air in the air introduction section 1A and the temperature control blower section 1B will be explained. The air sucked in from the suction port 12 by the first blowing section 10A flows along the introduction path in the air introduction section 1A, enters the first region 111, and undergoes first heat exchange with the filter 120 installed in the air conditioning case 100. After passing through the section (cooler) 121, the ventilation flow path is switched by the first air mix door 111A.

At this time, in one state of the first air mix door 111A, the air is blown to the first blowing part 4, the second blowing part 5, or the third blowing part 6 without passing through the second heat exchange part 122. When the 1 air mix door 111A is in another state, air is blown to the first blowing section 4, the second blowing section 5, or the third blowing section 6 via the second heat exchange section 122.

On the other hand, the air sucked in from the suction port 13 by the second blowing section 10B flows along the introduction path in the air introduction section 1A, enters the second region 112, and enters the filter 120 installed in the air conditioning case 100. After passing through the first heat exchange section 121, the air flow path is switched by the second air mix door 112A.

At this time, in one state of the second air mix door 112A, the air is blown to the first blowing part 4, the second blowing part 5, or the third blowing part 6 without passing through the second heat exchange part 122. When the 2-air mix door 112A is in any other state, air is blown to the first blowing section 4, the second blowing section 5, or the third blowing section 6 via the second heat exchange section 122.

The drive unit 11 that drives the air blower 10 (the first air blower 10A and the second air blower 10B) is arranged on the first area 111 side in the first area 111 and the second area 112. Moreover, the drive part 11 is arrange|positioned at the 1st ventilation part 10A side of 10A of 1st ventilation parts, and the 2nd ventilation part 10B.

Switching of the intake doors 22 and 23 in the air introduction section 1A according to the operation mode is performed by a door link mechanism 200 disposed on the outer surface of the air conditioning case 100 and an actuator 30 that drives the door link mechanism 200.

The state of the intake doors 22 and 23 shown in FIG. 4 is an inside air introduction mode in which the outside air intake port 2 is blocked by the shielding parts 22B and 23B, and the inside air intake ports 3A and 3B are opened. The state of the intake doors 22 and 23 shown in FIG. 5 is the same as that shown in FIG. It is in introduction mode. The state of the intake doors 22 and 23 shown in FIG. 6 is such that the intake door 22 closes the inside air intake 3A with the shielding part 22B and opens the outside air intake 2, and the intake door 23 closes the outside air intake with the shielding part 23B. This is a two-layer mode in which the inner air intake port 3B is closed and the inner air intake port 3B is opened.

4 to 7, the configuration of a door link mechanism 200 and an actuator 30 that switch between the aforementioned operation modes (inside air introduction mode (FIG. 4), outside air introduction mode (FIG. 5), and two-layer mode (FIG. 6)) Explain an example. The door link mechanism 200 and the actuator 30 are installed on different outer surfaces of the air conditioning case 100. In the illustrated example, the door link mechanism 200 is installed on the upper surface 100A of the air conditioning case 100, and the actuator 30 that drives it is installed on the outer surface of the air conditioning case 100. It is installed on the side surface 100B of the case 100.

Note that the arrangement of the door link mechanism 200 and the actuator 30 that drives the door link mechanism 200 is not limited to the illustrated embodiment; The door link mechanism 200 and the actuator 30 may be disposed on different outer surfaces of the air conditioning case 100 but adjacent to each other. In this way, by separately installing the door link mechanism 200 and the actuator 30 on different adjacent outer surfaces of the air conditioning case 100, the installation is easier than when the door link mechanism 200 and the actuator 30 are installed on the same surface of the air conditioning case 100. It is possible to prevent the dimensions of the surface from becoming larger than necessary.

The door link mechanism 200 includes door levers 201 and 202, which have one end fixed to the door shafts 22A and 23A and a connecting portion provided at the other end, in order to rotate the door shafts 22A and 23A of the intake doors 22 and 23, and an air conditioner. A cam link 210 is provided, which operates an operating end connected to a connecting portion by rotation of a main cam 211 pivotally supported by the case 100, and rotates the door levers 201 and 202. Further, the actuator 30 includes a drive rod 31 whose distal end portion 31A engages with an engagement groove 211A of the main cam 211 and is rotated around the base end side.

In the illustrated example, the cam link 210 includes the aforementioned main cam 211, a sub cam 212, link levers 213, 214, 215, and link rods 216, 217. In the cam link 210, a main cam 211, a sub cam 212, and link levers 213 to 215 are rotatably supported around an axis perpendicular to the upper surface 100A of the air conditioning case 100. are engaged, and the link lever 213 is connected to the link lever 215 via the link rod 217. Further, the main cam 211 is connected to a sub-cam 212 via a link rod 216, and a connecting portion of a link lever 214 is engaged with a cam groove of the sub-cam 212. A connecting portion of the link lever 214 is connected to the door lever 201, and a link lever 215 is connected to the door lever 202.

On the other hand, the drive rod 31 of the actuator 30 that rotationally drives the main cam 211 is rotated around an axis perpendicular to the side surface 100B of the air conditioning case 100, as shown in FIG. It engages with the connecting groove 211A of the main cam 211. Here, the tip end 31A of the drive rod 31 has a spherical surface, and the connecting groove 211A of the main cam 211 has a curved surface corresponding to this spherical surface. It has a groove depth that allows continued engagement.

That is, the drive rod 31 rotates around an axis perpendicular to the side surface 100B of the air conditioning case 100, and the main cam 211 connected to the drive rod 31 rotates around an axis perpendicular to the top surface 100A of the air conditioning case 100. The tip portion 31A of the main cam 211 approaches or separates from the main cam 211. The connecting groove 211A of the main cam 211 has a predetermined groove depth so that the connection between the main cam 211 and the driving rod 31 is always continued against such movement of the tip end 31A of the driving rod 31. have.

According to the engagement between the tip end 31A of the drive rod 31 and the connecting groove 211A of the main cam 211, as shown in FIG. As shown in FIGS. 4 and 5, the position of the connecting groove 211A is rotated by an angle β1 from the V1 position to the V2 position, and the intake doors 22 and 23 are changed from the inside air introduction mode shown in FIG. 4 to the inside air introduction mode shown in FIG. Switch to outside air introduction mode. Furthermore, when the drive rod 31 is rotated to the T3 position, the main cam 211 rotates the connecting groove 211A to the V3 position, as shown in FIG. Switch to 2-layer mode.

At this time, due to the engagement between the tip end 31A of the drive rod 31 and the connecting groove 211A of the main cam 211, the drive rod 31 rotates at an angle α2 from the T1 position to the T3 position, and the main cam 211 rotates at an angle α2 from the V1 position to the V3 position. The relationship β2 is β2>α2. As a result, the rotation angle of the main cam 211 can be made larger than the rotation angle of the drive rod 31 of the actuator 30, and the three operation modes (inside air introduction mode, outside air introduction mode) necessary for switching the intake doors 22 and 23 can be made larger. mode, two-layer mode), the operating range of the drive rod 31 in the actuator 30 can be reduced. With such a mechanism, it is possible to provide a space-efficient operating mechanism that can correspond to the operating modes of the intake doors 22 and 23 in a two-layer vehicle air conditioner.

FIG. 8 shows the state of the vehicle air conditioner 1 during maintenance. In the vehicle air conditioner 1, an actuator 30 is provided on the intake case 20 side in the left and right intake cases 20, 21, and by connecting the drive rod 31 of the actuator 30 to the main cam 211, the intake door on the intake case 20 side is connected. The cam link 210 (main cam 211, sub cam 212, link levers 213, 214) supported on the intake case 20 side and the cam link 210 (link lever 215) supported on the intake case 21 side ) are connected by a link rod 217 to link the operation of the intake door 22 with the operation of the intake door 23 on the intake case 21 side.

In this vehicle air conditioner 1, the actuator 30 and the drive section 11 of the blower section 10 are centrally arranged on the intake case 20 side. As shown in FIG. 8, the intake case 20 can be separated from the other housings of the air conditioning case 100 by disconnecting it from the link rod 217. Thereby, maintenance of the actuator 30 and the blower including the blower section 10 and drive section 11 can be performed by removing only the intake case 20 without disassembling the entire air conditioning case 100. At this time, since the connecting portion between the link rod 217 and the link lever 213 is located outside the outside air intake port 2, all maintenance work can be performed from the intake case 20 side. The above-mentioned maintenance can be completed simply by securing a work space outside the machine.

In the above description, the door link mechanism 200 and the actuator 30 that realize the operation modes of the intake doors 22 and 23 are explained, but such a door link mechanism 200 and the actuator 30 are not connected to the other parts in the air conditioning case 100. It is also possible to apply the present invention to the operation mode of the door, and in that case, it is also possible to provide a space-efficient operation mechanism that can correspond to a predetermined operation mode.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design may be changed without departing from the gist of the present invention. Even if there is, it is included in the present invention. Moreover, the above-described embodiments can be combined by using each other's technologies unless there is a particular contradiction or problem in the purpose, structure, etc.

1: Vehicle air conditioner, 1A: Air introduction section, 1B: Temperature control blower section,
2: Outside air intake, 3 (3A, 3B): Inside air intake,
4: First blowout part, 4A: First door,
5: Second blowing part, 5A: Second door,
6: Third air outlet, 6A: Foot air outlet, 6B: Rear seat foot air outlet,
6C: Rear seat face outlet, 60: Wind direction switching door,
10: ventilation section, 10A: first ventilation section, 10B: second ventilation section,
11: Drive part, 11A: Drive shaft, 12, 13: Suction port,
20, 21: Intake case, 22, 23: Intake door,
22A. 23A: rotating shaft, 22B, 23B: shielding part,
30: actuator, 31: drive rod, 31A: tip,
100: Air conditioning case, 100A: Top surface, 100B: Side surface,
110: partition wall, 111: first area, 112: second area,
111A: First air mix door, 112A: Second air mix door,
120: filter, 121: first heat exchange section, 122: second heat exchange section,
200: Door link mechanism, 201, 202: Door lever,
210: Cam link, 211: Main cam, 211A: Connection groove,
212: Sub cam, 213, 214, 215: Link lever,
216, 217: Link rod

Claims (4)

The air conditioning case includes an air conditioning case, a door link mechanism that switches a door in the air conditioning case according to an operation mode, and an actuator that drives the door link mechanism, and the door link mechanism and the actuator are arranged on an outer surface of the air conditioning case. A vehicle air conditioner that has
The door link mechanism is
a door lever that rotates a door shaft of the door;
a cam link that rotates the door lever by rotation of a main cam that is pivotally supported by the air conditioning case;
The actuator is
a driving rod whose distal end engages with the connecting groove of the main cam and is rotated around the proximal end;
The vehicle air conditioner is characterized in that the door link mechanism and the actuator are installed on different outer surfaces of the air conditioning case. The tip of the drive rod has a spherical surface,
2. The connecting groove has a curved surface corresponding to the spherical surface, and has a groove depth that allows the tip end to continue engaging with the main cam as the drive rod rotates. vehicle air conditioning system. The air conditioning case includes a partition wall that partitions the interior into a first area and a second area,
2. The vehicle air conditioner according to claim 1, wherein the door is a pair of intake doors capable of introducing inside air into one side of the first area and the second area and introducing outside air into the other side. . The pair of intake doors have an inside air introduction mode in which both inside air sides are opened and the outside air side closed, an outside air introduction mode in which both inside air sides are closed and the outside air side is opened, and one side is open in the inside air side and the outside air side is closed. 4. The vehicle air conditioner according to claim 3, wherein the vehicle air conditioner can be switched to a two-layer mode in which the inside air side is closed and the outside air side is opened.

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