JP4123901B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner, and more particularly to a device that switches an air passage by a rotary door.
[0002]
[Prior art]
The present applicant has previously disclosed a technique disclosed in Patent Document 1 as a method of switching an air passage using a rotary door. FIG. 7 is a partial longitudinal sectional view of an air conditioning unit 1 of a conventional vehicle air conditioner, in which (a) the operating state in the air conditioning unit 1 in the foot mode, (b) each opening 10 to 12 and the rotary door 9. It is a figure which shows the positional relationship with opening K2. By the way, the filled arrows represent the flow of cold air, and the white arrows represent the flow of hot air.
[0003]
This is provided on the downstream side of the air flow of the case 2 forming the air passage, the warm air passage 8 provided on one side of the case 2, the cold air passage 6 provided on the other side, and the two air passages 6 and 8. And a first opening portion having a substantially arc-shaped peripheral wall portion 9c connected to the rotation shaft 9a and having both ends in the circumferential direction of the peripheral wall portion 9c as opening edges. K1 and a rotary door 9 having a second opening K2 provided in the peripheral wall 9c.
[0004]
Further, on the downstream side of the air flow of the rotary door 9 of the case 2, a foot opening 10 near the hot air passage 8, a face opening 12 near the cold air passage 6, and a defroster opening 11 between them are provided. It is provided so as to be arranged adjacent to each other along the circumferential direction, the opening area thereof is adjusted by the rotary door 9, and air flows in from the first opening K1, and each opening opens through the second opening K2. It is a vehicle air conditioner that causes air to flow out to 10 to 12, and is switched to a desired outlet mode by rotating the rotary door 9.
[0005]
[Patent Document 1]
JP-A-8-268038
[0006]
[Problems to be solved by the invention]
However, in the structure of the conventional vehicle air conditioner, the following inconvenience may occur. That is, as shown in FIG. 7, in the foot mode, some warm air is blown out from the defroster opening 11 in order to prevent the windshield from being fogged, but the cold air from the cold air passage 6 is directly sent to the defroster opening 11. There is a problem that the defroster temperature is too low and the anti-fogging performance is not fully exhibited.
[0007]
Accordingly, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a vehicle air conditioner that can sufficiently exhibit anti-fogging performance even in the foot mode. is there.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, the following technical means are adopted. That is, in the first aspect of the present invention, the case (2) forming the air passage, the hot air passage (8) provided near one side of the case (2), and the cold air passage (6) provided near the other side (6). ) And the two ventilation paths (6, 8)the flow of airA rotary shaft (9a) provided on the downstream side and rotatably supported by the case (2), a substantially arc-shaped peripheral wall portion (9c) connected to the rotary shaft (9a), and the peripheral wall portion (9c) ) Having a first opening (K1) having both ends in the circumferential direction as opening edges, a rotary door (9) having a second opening (K2) provided in the peripheral wall (9c), and the case ( 2) of the rotary door (9)the flow of airOn the downstream side, closer to the hot air passage (8)The air flows in foot modeClose to foot opening (10), cold air passage (6)The air flows in face modeFace opening (12),Located between the foot opening (10) and the face opening (12), the air flows in the defroster mode.A defroster opening (11) is provided so as to be arranged adjacent to each other along the circumferential direction of the rotary door (9), and the rotary door (9)Rotation positionByOf the air flowIn the vehicle air conditioner that adjusts an opening area and causes air to flow out to the openings (10 to 12) through the first opening (K1) and the second opening (K2). Of the defroster opening (11)In part, theTo the foot opening (10) sideClosed and expanded the opening area into a U shapeOpen the opening (11a)A third opening (K3) is formed by shifting a part of the second opening (K2) corresponding to the position of the opening (11a) in the foot mode toward the cold air passage (6). In the foot mode, a part of the air in the rotary door (9) flowing to the foot opening (10) through the second opening (K2) is transferred to the third opening (K3). ) And the opening (11a) through the defroster opening (11).Features.
[0009]
  Because it is provided near the warm air passage (8) and has a foot opening (10) through which air flows in the foot mode,Since the warm air from the warm air passage (8) flows closer to the foot opening (10), it approaches a part of the defroster opening (11) toward the foot opening (10).The opening area was expanded in a U shapeBy providing the opening (11a),In the foot mode where the air flows into the foot opening (10)To defroster outletThrough the opening (11a)Warm air can be sent, and the anti-fogging performance can be sufficiently exhibited even in the foot mode.In order to make this possible, the rotary door (9) is configured as follows. That is, a part of the second opening (K2) corresponding to the position of the opening (11a) in the foot mode is shifted toward the cold air passage (6) to form the third opening (K3). Accordingly, the third opening (K3) is arranged corresponding to the position of the opening (11a) in the foot mode, and the warm air from the warm air passage (8) is opened to the third opening (K3). Since it flows through the portion (11a), the amount flowing to the foot opening (10) can be reduced to increase the amount flowing to the opening portion (11a), so that warm air can be sent to the defroster outlet. Become.
[0012]
  Claim 2In the invention described in (1), the air guide (2a) protrudes from the case (2) into the defroster opening (11) corresponding to the position of the opening (11a).
[0013]
This is because the flow of hot air concentrates at the position of the opening (11a) by providing the opening (11a) close to the foot opening (10) in a part of the defroster opening (11). The flow of the warm air is applied to the air guide (2a) so that the warm air is evenly distributed over the entire defroster opening (11). As a result, it is possible to prevent inconveniences caused by uneven blowout such as the warm air of the side differential being weak. Moreover, the distribution of warm air can be adjusted by the size and shape of the air guide (2a).
[0014]
  Claim 3In the invention described in item 1, the air guide (2a) is formed integrally with the case (2). Thereby, the cost of the vehicle air conditioner can be suppressed without increasing the number of parts and the number of assembly steps.
[0015]
  Claim 4In the invention described in (1), the opening portion (11a) is provided substantially at the center in the direction of the rotation axis (9a) of the defroster opening (11). In this way, by arranging the warm air flow substantially at the center, it is possible to reduce the inconvenience caused by the unevenness of the blowouts and to make the adjustment easier. In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to an air conditioning unit of a vehicle air conditioner (car air conditioner) will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the air conditioning unit 1. The ventilation system of the vehicle interior unit according to the present embodiment is roughly divided into two parts, a blower unit (not shown) and the air conditioning unit 1. The blower unit is arranged offset from the center part to the passenger seat side in the lower part of the instrument panel in the passenger compartment. On the other hand, the air conditioning unit 1 is arranged in the vehicle left and right direction in the lower part of the instrument panel in the passenger compartment. It is arranged at a substantially central part.
[0017]
As is well known, the blower unit is composed of an inside / outside air switching box for switching between and introducing inside air (vehicle interior air) and outside air (vehicle outside air), and a blower that sucks and blows air through the inside / outside air switching box. . The air conditioning unit 1 is of a type in which both an evaporator (cooling heat exchanger) 3 and a heater core (heating heat exchanger) 4 are integrally incorporated in one common air conditioning case 2. The air conditioning case 2 is made of a resin molded product having a certain degree of elasticity and excellent strength, such as polypropylene.
[0018]
The air-conditioning case 2 is specifically composed of a plurality of divided cases. The plurality of divided cases are provided with fastening means such as metal spring clips and screws after housing the heat exchangers 3 and 4 and doors and the like described later. Thus, the air conditioning unit 1 is configured by being integrally coupled. The air conditioning unit 1 is arranged in the form shown in FIG. 1 with respect to the longitudinal direction and the vertical direction of the vehicle. An air inlet 5 is formed in the lowermost part of the air conditioning case 2. Air-conditioned air blown from the above-described blower unit flows into the air inlet 5.
[0019]
In the air conditioning case 2, the evaporator 3 is disposed immediately after the air inlet 5. The evaporator 3 is thin in the vertical direction of the vehicle, and is disposed so as to cross the passage in the air conditioning case 2 and is substantially horizontal, but with the fan unit side slightly raised and inclined. Accordingly, the blown air from the air inlet 5 flows into the lower surface of the evaporator 3 extending in the vehicle front-rear direction. As is well known, the evaporator 3 absorbs the latent heat of evaporation of the refrigerant in the refrigeration cycle from the conditioned air to cool the conditioned air.
[0020]
And the heater core 4 is arrange | positioned at predetermined intervals in the air flow downstream side (vehicle upper side) of the evaporator 3. The heater core 4 is arranged in a substantially horizontal posture at a substantially center in the air conditioning case 2. Although not shown, the width dimension of the evaporator 3 and the heater core 4 in the left-right direction of the vehicle is designed to be substantially the same as the width dimension of the air conditioning case 2.
[0021]
The heater core 4 reheats the cold air that has passed through the evaporator 3, and hot water (engine cooling water) flows through the heater core 4 and heats the air using this hot water as a heat source. In the air passage in the air conditioning case 2, a first cold air bypass passage 6 is formed in the rear portion of the heater core 4 as a cold air passage that bypasses the heater core 4 and flows air (cool air). An air mix door 7 is disposed in the first cold air bypass passage 6.
[0022]
The air mix door 7 opens and closes the first cold air bypass passage 6 and adjusts the amount of cold air that bypasses the heater core 4 through the first cold air bypass passage 6 among the air blown by the blower unit. The first cold air bypass passage 6 and the hot air passage 8 passing through the heater core 4 are provided so as to be aligned in the vehicle front-rear direction, and in most cases, the cold air and the hot air flowing through these passages will be described later. The air is mixed well in the arcuate rotary door 9.
[0023]
The air mix door 7 is integrally coupled to a rotating shaft 7a disposed in the horizontal direction (vehicle width direction), and is rotatable in the vehicle vertical direction around the rotating shaft 7a. The rotating shaft 7a is rotatably supported by the air conditioning case 2, and one end of the rotating shaft 7a protrudes to the outside of the air conditioning case 2, and is an actuator mechanism using a servo motor or the like via a link mechanism (not shown). And the rotational position of the air mix door 7 is adjusted by this actuator mechanism.
[0024]
In the upper part of the heater core 4, a plurality of, in this embodiment, three openings 10 to 12 are provided so as to be adjacent to each other along the rotation direction of the rotary door 9 described later. As shown in FIG. 2 and subsequent figures, these openings 10 to 12 have a substantially rectangular shape in which the direction from the front surface to the back surface is the longitudinal direction.
[0025]
The shapes and areas of the openings 10 and 11 are substantially the same, and the opening 12 has the same width from the front side to the back side in FIG. 1, but the maximum length in the rotation direction of the rotary door 9 (described later). The maximum opening angle in the rotation direction of the rotary door 9 around the rotation shaft 9a is slightly larger. As a result, the area of the opening 12 is slightly larger than the area of the openings 10 and 11.
[0026]
The opening 12 is arranged in a vehicle interior via a face duct (not shown) and communicates with a face outlet (not shown) (for example, a center face or a side face) for blowing air toward the upper body of the occupant. The air that has passed through the section 12 is always blown out from these face outlets. The opening 10 communicates with a foot outlet (not shown) for blowing air toward the feet of the passengers disposed in the passenger compartment via a foot duct (not shown), and the air that has passed through the opening 10 is inevitable. It is blown out from the foot outlet.
[0027]
The opening 11 is disposed in the vehicle interior via a defroster duct (not shown) and communicates with a defroster outlet (not shown) for blowing conditioned air toward the inner surface of a vehicle glass (not shown) such as a windshield or side glass, Air that has passed through the opening 11 is inevitably blown out from these defroster outlets.
[0028]
In this embodiment, an opening portion 11 a that is close to the foot opening 10 is provided in a part of the defroster opening 11. Further, an air guide 2a integrally formed with the case 2 is protruded into the defroster opening 11 corresponding to the position of the opening 11a.
[0029]
In the air passage in the air conditioning case 2, a second cold air bypass passage 13 through which air (cold air) flows by bypassing the rotary door 9 is formed at a rear portion of the rotary door 9. A max cool door 14 is disposed in the second cold air bypass passage 13. The max cool door 14 opens and closes the second cold air bypass passage 6, and the cold air mainly bypassing the heater core 4 by the air mix door 7 passes through the second cold air bypass passage 13 and flows to the face outlet. To do.
[0030]
The max cool door 14 is integrally coupled to a rotating shaft 14a disposed in the horizontal direction (vehicle width direction), and is rotatable in the vehicle vertical direction around the rotating shaft 14a. The rotary shaft 14a is rotatably supported by the air conditioning case 2, and one end portion of the rotary shaft 14a protrudes outside the air conditioning case 2, and an actuator mechanism using a servo motor or the like via a link mechanism (not shown) It is connected to a manual operation mechanism, and the max cool door 14 is opened and closed by this actuator mechanism or manual operation mechanism.
[0031]
Thus, when the blower of the blower unit is driven, the inside air or the outside air is sucked from the inside / outside air switching box and guided into the air conditioning case 2, passes through the evaporator 3, and further passes through the first cold air bypass passage in the air conditioning case 2. 6 or the hot air passage 8 and reaches a set temperature, and is blown out from each outlet in the vehicle compartment via any one of the openings 10 to 12. In addition, although mentioned later in detail, in this embodiment, five blowing modes can be selected by the opening parts 10-12.
[0032]
Now, in this air-conditioning case 2, the rotary door 9 which adjusts each opening area of the said opening parts 10-12 is provided. Hereinafter, the rotary door 9 according to the present embodiment will be described. The rotary door 9 is made of, for example, plastic and has a so-called vertically divided semi-cylindrical shape integrally including two semi-circular end plate portions 9b and a peripheral wall 9c having an arcuate surface shape.
[0033]
The end plate portion 9b is provided with a rotating shaft 9a that is located at the center of curvature of the arc of the peripheral wall 9c and protrudes outward in the axial direction. Therefore, as shown in FIG. 1, the angle from the one end to the other end in the rotation direction of the rotary door 9 is about 180 degrees about the rotating shaft 9a. However, it is enlarged with a slight allowance in consideration of the rotational deviation accompanying the rotation of the rotary door 9.
[0034]
FIG. 2B is a diagram illustrating a positional relationship between the openings 10 to 12 and the openings K1 to K3 of the rotary door 9. As shown in the figure, four (second) openings K2 having a substantially hexagonal shape are formed in the peripheral wall 9c side by side in the axial direction. A third opening K3 in which a part of the opening K2 is shifted closer to the cold air passage 6 (on the left side in FIG. 2 (b)) corresponding to the position of the opening 11a at the substantially central portion in the axial direction. Is provided. The rotary door 9 configured as described above is rotatably mounted in the air conditioning case 2 by being supported by the wall portion of the air conditioning case 2.
[0035]
A lever (not shown) is fixed to one of the rotating shafts 9a, and one end of a control cable is connected to the end of the lever. The other end side of the control cable is connected to a blowing mode switching lever as a switching operation means (not shown) provided in the vehicle interior, so that the rotary door 9 rotates in the direction of rotation (based on the operation of the blowing mode switching lever ( In FIG. 1, the rotation is displaced clockwise and counterclockwise. Thus, the openings 10 to 12 are opened and closed according to the position of the blow mode switching lever.
[0036]
Next, the operation in the above configuration will be described. As described above, the air flowing in the air conditioning case 2 as the blower is driven reaches the inner peripheral side of the rotary door 9 from the first opening K1 having both edges in the circumferential direction of the peripheral wall 9c as opening edges, and the peripheral wall 9c. Through the second and third openings K2 and K3, the openings 10 to 12 reach the outlets in the vehicle.
[0037]
In this embodiment, when an occupant operates the blow mode switching lever in the vehicle, the operating force is directly transmitted to the rotary door 9 via a control cable and a lever (not shown), and the rotary door 9 is rotated clockwise or counterclockwise. Rotate clockwise. At this time, specifically, the rotary door 9 is rotationally displaced to each predetermined position shown in FIGS. 2 to 6 and any one of the five blowing modes is selected.
[0038]
Further, the blowing mode switching lever in the present embodiment is movable in the width direction of the vehicle, and the face mode, bi-level mode, The foot mode, the foot differential mode, and the defroster mode can be selected in this order. That is, the rotary door 9 rotates in proportion to the operation amount of the blowing mode switching lever.
[0039]
Next, the above-described blowing mode will be described. First, the face mode will be described with reference to FIG. FIG. 2 is a diagram showing (a) the operating state in the air conditioning unit 1 in the face mode, and (b) the positional relationship between the openings 10 to 12 and the openings K1 to K3 of the rotary door 9. Incidentally, the solid arrows in FIG. 2 (a) indicate the flow of cold air, the white arrows indicate the flow of hot air, and the hatched arrows indicate the flow of the conditioned air in which the cold air and the hot air are mixed. The hatching of b) represents the open part.
[0040]
When the blow mode switching lever is located on the leftmost side in the width direction of the vehicle and the face mode is selected, the peripheral wall 9c of the rotary door 9 completely connects the foot opening 10 and the defroster opening 11 as shown in FIG. The face opening 12 is fully opened. The cold air from the cold air passage 6 mainly flows into the rotary door 9 from the opening K1, and the hot air from the hot air passage 8 flows into the rotary door 9 from the opening K1 and the openings K2 and K3. Then, the cool and warm air is mixed in the rotary door 9 to be conditioned and blown out from the face opening 12.
[0041]
Next, a bilevel mode (a mode in which air is blown into the vehicle compartment from both the face opening 12 and the foot opening 10) will be described with reference to FIG. FIG. 3 is a diagram illustrating (a) the operating state in the air conditioning unit 1 and (b) the positional relationship between the openings 10 to 12 and the openings K1 to K3 of the rotary door 9 in the bi-level mode. Here, the bi-level mode is mainly used in an intermediate period (spring or autumn), and in this case, the occupant's warm feeling is ideally a cold head heat.
[0042]
In the bi-level mode, the rotary door 9 rotates clockwise in FIG. 2 from the face mode state shown in FIG. 2, so that the peripheral wall 9c opens half of the face opening 12, and the openings K2 and K3 are opened. Open half of the foot opening 10. At this time, the defroster opening 11 remains completely closed by the peripheral wall 9c.
[0043]
The cold air from the cold air passage 6 mainly flows into the rotary door 9 from the opening K1, and the hot air from the hot air passage 8 flows into the rotary door 9 from the opening K1 and the openings K2 and K3. However, air conditioned air with a large proportion of cold air is blown out from the face opening 12, and air conditioned air with a large proportion of hot air is blown out from the foot opening 10. A difference can be obtained and head cold foot fever can be achieved.
[0044]
Next, the foot mode will be described with reference to FIG. FIG. 4 is a diagram illustrating (a) the operating state in the air conditioning unit 1 in the foot mode, and (b) the positional relationship between the openings 10 to 12 and the openings K1 to K3 of the rotary door 9. In this case, the rotary door 9 rotates further clockwise than in the above-described bilevel mode, so that the opening K2 fully opens the foot opening 10.
[0045]
Further, the opening K3 opens in an opening portion 11a provided in a part of the defroster opening 11 so as to be close to the foot opening 10 side. The reason for this is that the foot mode is mainly used when the outside air temperature is low, and the glass of the vehicle tends to be fogged. Therefore, the glass is prevented from being fogged by blowing a little air-conditioning air on the inner surface of the glass. Further, the peripheral wall 9c completely closes the face opening 12.
[0046]
The cold air from the cold air passage 6 and the hot air from the hot air passage 8 both flow into the rotary door 9 from the opening K1, and flow into the rotary door 9 from the opening K1 and the openings K2 and K3. Then, the cool and warm air is mixed in the rotary door 9 to be conditioned air, blown mainly from the foot opening 10 through the opening K2, and partially blown from the defroster opening 11 through the opening K3. . At this time, the conditioned air blown out from the defroster opening 11 has a slightly higher ratio of the cold air than the conditioned air blown out from the foot opening 10, and thus becomes conditioned air having a slightly lower temperature.
[0047]
In addition, the conditioned air blown from the defroster opening 11 hits the air guide 2a that is integrally formed with the case 2 and protrudes into the defroster opening 11 corresponding to the position of the opening 11a, and is uniform throughout the defroster opening 11. Distribution.
[0048]
Next, the foot differential mode will be described with reference to FIG. FIG. 5 is a diagram showing (a) the operating state in the air conditioning unit 1 and (b) the positional relationship between the openings 10 to 12 and the openings K1 to K3 of the rotary door 9 in the foot differential mode. In this case, when the rotary door 9 is further rotated clockwise from the above-described foot mode state, the opening K2 opens the foot opening 10 and the defroster opening 11 in half, and the opening K3 opens the defroster opening. Open to the part 11. At this time, the face opening 12 remains completely closed by the peripheral wall 9c.
[0049]
The cold air from the cold air passage 6 and the hot air from the hot air passage 8 both flow into the rotary door 9 from the opening K1, and the cold and hot air is mixed in the rotary door 9 to become conditioned air, and the opening K2. -It blows off from the foot opening part 10 and the defroster opening part 11 through K3.
[0050]
At this time, it seems that the cool air easily flows to the defroster opening 11 and the warm air easily flows to the foot opening 10, but the cool and warm air flows to the opening K3 and flows to the defroster opening 11, and to the opening K2. Since the direct warm air easily flows to the defroster opening 11, the blowing temperature of the defroster opening 11 becomes moderately high, and an appropriate vertical temperature difference can be secured as the foot differential mode.
[0051]
Finally, the defroster mode will be described with reference to FIG. FIG. 6 is a diagram illustrating (a) the operating state in the air conditioning unit 1 in the defroster mode, and (b) the positional relationship between the openings 10 to 12 and the openings K1 to K3 of the rotary door 9. The defroster mode is a state in which the rotary door 9 is further rotated clockwise from the above-described foot differential mode. Thereby, the opening K2 fully opens the defroster opening 11, and the opening K3 also opens to the defroster opening 11. At this time, the face opening 12 remains completely blocked by the peripheral wall 9c, and the foot opening 10 is also completely blocked by the peripheral wall 9c.
[0052]
The cold air from the cold air passage 6 and the hot air from the hot air passage 8 both flow into the rotary door 9 from the opening K1, and the cold and hot air is mixed in the rotary door 9 to become conditioned air, and the opening K2. -It blows off from the defroster opening part 11 through K3.
[0053]
Next, features of this embodiment will be described. First, an opening portion 11 a that is closer to the foot opening 10 is provided in a part of the defroster opening 11. Since the warm air from the warm air passage 8 flows near the foot opening 10, the warm air is sent to the defroster outlet by providing an opening portion 11 a near the foot opening 10 in a part of the defroster opening 11. In addition, the anti-fogging performance can be sufficiently exhibited even in the foot mode.
[0054]
Further, a part of the second opening K2 corresponding to the position of the opening part 11a is defined as a third opening (K3) shifted toward the cold air passage (6). Thereby, in the part corresponding to the position of the opening part 11a, since the quantity which flows the warm air from the warm air channel | path 8 into the opening part 11a can be decreased by decreasing the quantity which flows into the foot opening part 10, more defroster blower outlets are possible. You will be able to send warm air to.
[0055]
Further, the air guide 2 a is protruded from the case 2 in the defroster opening 11 corresponding to the position of the opening portion 11 a. This is because the flow of hot air is concentrated at the position of the opening portion 11a by providing an opening portion 11a that is closer to the foot opening portion 10 in a part of the defroster opening portion 11. The hot air is evenly distributed over the entire defroster opening 11 by being applied to the guide 2a.
[0056]
As a result, it is possible to prevent inconveniences caused by uneven blowout such as the warm air of the side differential being weak. Further, the distribution of warm air can be adjusted by the size and shape of the air guide 2a. The air guide 2 a is formed integrally with the case 2. Thereby, the cost of the vehicle air conditioner can be suppressed without increasing the number of parts and the number of assembly steps.
[0057]
Moreover, the opening part 11a is provided in the approximate center in the rotating shaft 9a direction of the defroster opening part 11. As shown in FIG. In this way, by arranging the warm air flow substantially at the center, it is possible to reduce the inconvenience caused by the unevenness of the blowouts and to make the adjustment easier.
[0058]
(Other embodiments)
Although the embodiment of the present invention has been described above, the present invention can also be applied to the following modifications. In the above-described embodiment, the opening portion 11a is provided at substantially the center in the longitudinal direction of the defroster opening 11. However, a plurality of openings 11a may be provided in the longitudinal direction. Moreover, although the rotary door 9 is comprised by the molded article, you may comprise by the rotary door which stretched the film member on the outer surface of the substantially semi-cylindrical frame.
[0059]
Moreover, although the opening K2 is configured by a plurality of substantially hexagonal holes, the number is not limited to a plurality and may be one. In the above embodiment, the foot opening 10, the defroster opening 11, and the face opening 12 are arranged in order from the left side to the right side in FIG. 1, but the defroster opening 11 and the face opening 12 may be interchanged. good.
[0060]
Further, the drive structure of the rotary door 9 is not limited to the one in which the control cable is directly driven by the blowing mode switching lever. You may comprise so that the rotary door 9 may be rotationally displaced.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an air conditioning unit of a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is a diagram showing (a) an operating state in the air conditioning unit and (b) a positional relationship between each opening and an opening of the rotary door in the face mode.
FIG. 3 is a diagram showing (a) the operating state in the air conditioning unit and (b) the positional relationship between each opening and the opening of the rotary door in the bi-level mode.
FIG. 4 is a diagram showing (a) an operating state in the air conditioning unit and (b) a positional relationship between each opening and the opening of the rotary door in the foot mode.
FIG. 5 is a diagram showing (a) the operating state in the air conditioning unit in the foot differential mode, and (b) the positional relationship between each opening and the opening of the rotary door.
FIG. 6 is a diagram showing (a) the operating state in the air conditioning unit and (b) the positional relationship between each opening and the opening of the rotary door in the defroster mode.
FIG. 7 is a diagram showing (a) the operating state in the air conditioning unit in the conventional foot mode, and (b) the positional relationship between each opening and the opening of the rotary door.
[Explanation of symbols]
2 Air conditioning case (case)
2a Air guide
6 1st cold air bypass passage (cold air passage)
8 Hot air passage
9 Rotary door
9a Rotating shaft
9c peripheral wall
10 Foot opening
11 Defroster opening
11a Opening part
12 Face opening
K1 first opening
K2 second opening

Claims (4)

A case (2) forming an air passage;
A hot air passage (8) provided on one side of the case (2) and a cold air passage (6) provided on the other side;
A rotary shaft (9a) which is provided on the downstream side of the air flow of the two ventilation paths (6, 8) and is rotatably supported by the case (2), and a substantially circular shape connected to the rotary shaft (9a). An arc-shaped peripheral wall portion (9c), a first opening portion (K1) having an opening edge at both ends in the circumferential direction of the peripheral wall portion (9c), and a second opening portion (K2) provided in the peripheral wall portion (9c) A rotary door (9) having
A foot opening (10) provided near the hot air passage (8) on the downstream side of the air flow of the rotary door (9) of the case (2) and through which the air flows in the foot mode , the cold air passage ( 6) A face opening (12) provided near the face opening (12) through which the air flows in the face mode, and a defroster opening through which the air flows between the foot opening (10) and the face opening (12). The part (11) is provided so as to be arranged adjacent to each other along the circumferential direction of the rotary door (9),
The opening area of the air flow is adjusted according to the rotational position of the rotary door (9) , and each opening portion (via the first opening portion (K1) and the second opening portion (K2)) 10-12) in a vehicle air conditioner that causes air to flow out,
Wherein a portion of the defroster opening (11), provided with the foot opening (10) an opening region U by the side-shape widened opening portion (11a),
A portion of the second opening (K2) corresponding to the position of the opening (11a) in the foot mode is shifted toward the cold air passage (6) to form a third opening (K3),
In the foot mode, a part of the air in the rotary door (9) flowing to the foot opening (10) through the second opening (K2) is transferred to the third opening (K3). An air conditioner for a vehicle, which flows through the opening (11a) to the defroster opening (11) .   The air conditioner for vehicles according to claim 1, wherein an air guide (2a) protrudes from the case (2) into the defroster opening (11) corresponding to the position of the opening (11a). apparatus. The vehicle air conditioner according to claim 2, wherein the air guide (2a) is formed integrally with the case (2).   The vehicle air conditioner according to claim 1, wherein the opening portion (11a) is provided substantially at the center of the defroster opening (11) in the direction of the rotation axis (9a).

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