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US20040093884A1 - Vehicle air conditioner - Google Patents

Vehicle air conditioner Download PDF

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Publication number
US20040093884A1
US20040093884A1 US10/700,721 US70072103A US2004093884A1 US 20040093884 A1 US20040093884 A1 US 20040093884A1 US 70072103 A US70072103 A US 70072103A US 2004093884 A1 US2004093884 A1 US 2004093884A1
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US
United States
Prior art keywords
air
opening
rotary
door
foot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/700,721
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English (en)
Inventor
Hideki Seki
Yoshiharu Okawa
Takayuki Shimauchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Individual
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32105426&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20040093884(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Individual filed Critical Individual
Assigned to DENSO CORPORATION reassignment DENSO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OKAWA, YOSHIHARU, SEKI, HIDEKI, SHIMAUCHI, TAKAYUKI
Publication of US20040093884A1 publication Critical patent/US20040093884A1/en
Priority to US11/881,174 priority Critical patent/US7806172B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
    • B60H1/00835—Damper doors, e.g. position control
    • B60H1/00842—Damper doors, e.g. position control the system comprising a plurality of damper doors; Air distribution between several outlets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00664—Construction or arrangement of damper doors
    • B60H1/00671—Damper doors moved by rotation; Grilles
    • B60H1/00685—Damper doors moved by rotation; Grilles the door being a rotating disc or cylinder or part thereof

Definitions

  • the present invention relates to a vehicle air conditioner including an air-outlet mode selecting device for opening and closing air outlet openings.
  • the air-outlet mode selecting device includes two rotary doors each of which has an outer peripheral door surface turning with a rotary shaft.
  • An air-outlet mode selecting mechanism for opening and closing air outlet openings in an air conditioner for a vehicle is broadly divided into the following three types of air-outlet mode selecting devices.
  • the first type of air-outlet mode selecting device as shown in FIG. 22, opens and closes a defroster opening 20 , a face opening 21 and a foot opening 22 by the use of a face/defroster selector door 110 made of a cantilever plate door and a foot door 100 made of a cantilever plate door.
  • the plate-shaped foot door 100 is provided with a rotary shaft 100 a at one end thereof and is turned around the rotary shaft 100 a .
  • the plate-shaped face/defroster selector door 110 is provided with a rotary shaft 110 a at one end thereof and is turned around the rotary shaft 110 a.
  • the second type of air-outlet mode selecting device opens and closes the defroster opening 20 , the face opening 21 and the foot opening 22 by the use of a foot door 100 , a face door 110 and a defroster door 120 each of which is made of a butterfly door.
  • the butterfly door 100 is provided with a rotary shaft 100 a at the center thereof and is turned around the rotary shaft 100 a .
  • the butterfly door 110 is provided with a rotary shaft 110 a at the center thereof and is turned around the rotary shaft 110 a
  • the butterfly door 120 is provided with a rotary shaft 120 a at the center thereof and is turned around the rotary shaft 120 a.
  • the third type of air-outlet mode selecting device opens and closes the face opening 21 , the defroster opening 20 and the foot opening 22 by the use of a single rotary door having an outer peripheral door surface turning with a rotary shaft. Further, the outer peripheral door surface turning with the rotary shaft is arranged at a position separated by a predetermined distance outward in the radial direction from the center of the rotary shaft. This outer peripheral door surface is usually shaped like an arc having its center at the rotary shaft.
  • the defroster/face selector door 110 and the foot door 100 are respectively constructed of the cantilever plate doors, so the doors 100 , 110 need to be operated against the pressure of blowing air applied to the whole surface of the plate door. Further, there are cases where the doors 100 , 110 need to be operated against their self-weights. As described above, because the doors 100 , 110 need to be operated against the pressure of blowing air and the self-weight, the first type of air-outlet mode selecting device presents a problem that a door operating force becomes large.
  • the three doors 100 to 120 are constructed of the butterfly doors.
  • the butterfly door has the rotary shaft at the center of the door plate, so the force applied to one side of the door plate by the air pressure and the self-weight is opposite to the force applied to the other side of the door plate by the air pressure and the self-weight. Therefore, the second type of air-outlet mode selecting device has an advantage of canceling effects of the air pressure and the self-weight, thereby reducing the door operating force as compared with the first type of air-outlet mode selecting device.
  • the door plate is located near the center of the air passage of the respective openings when the respective openings are fully opened (see door 110 in FIG. 23).
  • the face opening 21 , the defroster opening 20 and the foot opening 22 can be opened and closed by the single rotary door, so the third type of air-outlet mode selecting device has an advantage of reducing the number of doors and simplify a link mechanism for operating the doors as compared with the first and second types of air-outlet mode selecting devices.
  • the third type of air-outlet mode selecting device for the following reasons, deteriorates the mounting performance in a vehicle. That is, in the third type of air-outlet mode selecting device, all of the face opening, the defroster opening and the foot opening need to be arranged in an arc shape along the turning path of the outer peripheral door surface of the rotary door.
  • the air conditioning unit is arranged in a place that is inside the instrument panel (i.e., dashboard) of the vehicle and is subjected to extreme spatial constraint.
  • the air conditioning unit is arranged in a place that is inside the instrument panel (i.e., dashboard) of the vehicle and is subjected to extreme spatial constraint.
  • an object of the present invention to provide an air-outlet mode selecting device of an air conditioner for a vehicle, which can reduce a door operating force and an air flow resistance, and can improve mounting performance of the air conditioner in the vehicle.
  • a heat exchanger for performing a heat exchange with air is disposed in a case for defining an air passage through which air flows into a passenger compartment.
  • the case is provided with a defroster opening through which air flows toward an inner surface of a front windshield of the vehicle, a face opening through which air flows toward an upper side of the passenger compartment, and a foot opening through which air flows toward a lower side of the passenger compartment, at positions downstream from the heat exchanger.
  • the air conditioner is provided with an air-outlet mode selecting device for opening and closing the defroster opening, the face opening and the foot opening.
  • the mode selecting device includes first and second rotary doors, and each of the first and second rotary doors includes a rotation shaft, an outer peripheral door surface separated from a center axial line of the rotation shaft to a radial outside by a predetermined dimension, and two side plates connected to the rotation shaft and end portions of the outer peripheral door surface in an axial direction of the rotation shaft.
  • one of the first and second rotary doors is disposed to open and close one of the defroster opening, the face opening and the foot opening
  • the other one of the first and second rotary doors is disposed to open and close the other two of the defroster opening, the face opening and the foot opening.
  • each of the first and second rotary doors the outer peripheral door surface is rotated around the rotation shaft in a direction perpendicular to an air flow direction. Accordingly, door operation force of the mode selecting device can be effectively reduced, and the size of the mode selecting device can be effectively reduced. Further, because each rotary door does not partition a hot air flow and a cool air flow, a temperature difference of air blown into each opening can be reduced. In addition, because both of the rotary doors are arranged to open and close the three openings, one of the three openings can be arbitrarily arranged relative to the other two of the three openings. Thus, the size of the mode selecting device constructed with the first and second doors can be effectively reduced, and mounting performance of the air conditioner using the mode selecting device can be improved.
  • each of the first and second rotary doors is formed into a gate shape by the outer peripheral door surface and the two side plates to have an inner space of the gate shape through which air after passing through the heat exchanger flows.
  • the defroster opening, the face opening and the foot opening are arranged outside of the gate shapes of the first and second rotary doors, and each of the first and second rotary doors is provided with a seal portion on peripheral end portions of the outer peripheral door surface and the two side plates.
  • the case has seal surfaces each of which is provided around each of the openings, and the seal portion of the rotary door press-contacts the seal surface of the case so that a communication between the inner space of the gate shape and each of the openings is shut. Therefore, a gate shape space can be constructed with the outer peripheral door surface and the two side plates in each of the first and second rotary doors.
  • the heat exchanger includes a heating heat exchanger for heating air, and the heating heat exchanger is disposed in the case to form a hot air passage through which air passes the heating heat exchanger and a cold air passage through which air bypasses the heating heat exchanger.
  • the air passage of the case is provided with a hot air bypass passage through which air in the hot air passage is branched into right and left sides of the cold air passage and is introduced into the foot opening. Therefore, a comfortable up and down temperature distribution of air to be blown into the passenger compartment can be provided.
  • the first rotary door is disposed to open and close the foot opening
  • the second rotary door is disposed to open and close the defroster opening and the face opening.
  • the face opening is partitioned into a center face opening portion through which air is blown toward a center upper side of the passenger compartment in a width direction of the vehicle, and a side face opening portion through which air is blown toward a side upper side of the passenger compartment in the width direction.
  • the second rotary door is disposed to maintain an open state of the side face opening portion even while closing the center face opening portion. Therefore, it is possible to always introduce air into the side face opening portion. Accordingly, air-conditioning feeling given to a passenger adjacent to a side windshield can be improved, and defogging performance of the side windshield can be improved.
  • FIG. 1 is a longitudinal cross-sectional view of an air conditioning unit in a face mode, in accordance with a first embodiment of the present invention
  • FIG. 2 is a perspective view showing a rotary door structure in the first embodiment
  • FIG. 3 is a cross-sectional view taken on the line III-III in FIG. 1, showing a hot air bypass passage;
  • FIG. 4 is a cross-sectional view showing a main part in FIG. 1, in a bi-level mode
  • FIG. 5 is a cross-sectional view showing a main part in FIG. 1, in a foot mode
  • FIG. 6 is a cross-sectional view showing a main part in FIG. 1, in a foot/defroster mode
  • FIG. 7 is a cross-sectional view showing a main part in FIG. 1, in a defroster mode
  • FIG. 8 is a longitudinal cross-sectional view of an air conditioning unit in a foot mode, in accordance with a second embodiment of the present invention.
  • FIG. 9 is a cross-sectional view taken on the line IX-IX in FIG. 8, showing a structure in which two rotary doors are stacked;
  • FIG. 10 is a cross-sectional view showing a main part of an air conditioning unit in accordance with a third embodiment of the present invention.
  • FIG. 11 is a cross-sectional view showing a main part of an air conditioning unit in accordance with a fourth embodiment of the present invention.
  • FIG. 12 is a cross-sectional view showing a main part of an air conditioning unit in accordance with a fifth embodiment of the present invention.
  • FIG. 13 is a top plan view of a left half portion of the air conditioning unit in accordance with the fifth embodiment
  • FIGS. 14A, 14B, 14 C are a partial perspective view, a partial top plan view, and a cross-sectional view of the structure of the second rotary door in accordance with the fifth embodiment, respectively;
  • FIG. 15 is a cross-sectional view showing a main part of an air conditioning unit in a foot mode in a state where air does not blow off from the defroster opening, in accordance with a sixth embodiment of the present invention.
  • FIG. 16 is a top plan view of a left half portion of the air conditioning unit in accordance with the sixth embodiment, when the foot mode is set in a state where air does not blow off from the defroster opening;
  • FIGS. 17A, 17B, 17 C are a partial perspective view, a partial top plan view, and a cross-sectional view of the structure of a second rotary door, in accordance with the sixth embodiment, respectively;
  • FIG. 18 is a top plan view of a left half portion of the air conditioning unit in accordance with the sixth embodiment and shows a state where the second rotary door is dismounted;
  • FIG. 19 is a top plan view of the left half portion of the air conditioning unit in accordance with the sixth embodiment and shows a position relationship between the seal part of the second rotary door and a case side seal surface provided in a case;
  • FIG. 20 is a cross-sectional view of a main part of the sixth embodiment and shows a foot mode in a state where air blows off by a small amount from a defroster opening;
  • FIG. 21 is a top plan view of the left half portion of the air conditioning unit in accordance with the sixth embodiment and shows a foot mode in a state where air blows off by a small amount from the defroster opening;
  • FIG. 22 is a cross-sectional view showing a main part of an air conditioning unit of the related art.
  • FIG. 23 is a cross-sectional view showing a main part of another air conditioning unit of the related art.
  • An air conditioning unit 10 shown in FIG. 1 is arranged nearly at the center in the width direction (right-left direction) of a vehicle inside an instrument panel (i.e., dashboard) at the front in a passenger compartment.
  • the interior unit of an air conditioner for a vehicle is broadly divided into the above-described air conditioning unit 10 arranged nearly at the center and a blower unit (not shown) arranged in a position offset to a front passenger's seat in the width direction from the center inside the instrument panel.
  • the blower unit has an inside/outside air switching box for selectively introducing outside air (i.e., air outside the passenger compartment) and inside air (i.e., air inside the passenger compartment), and a centrifugal blower for blowing air introduced into this inside/outside air switching box.
  • the air blown by this blower unit flows into a lowermost air inflow space 12 in a case 11 of the air conditioning unit 10 .
  • the case 11 is formed of resin having an elasticity and a high mechanical strength, such as polypropylene. For convenience in releasing a molded product from a mold after molding air-conditioning parts in the case, the case 11 is divided into a plurality of split cases and then the plural split cases are integrally combined into one piece.
  • An evaporator 13 serving as a heat exchanger for cooling is arranged nearly in a horizontal direction to be inclined by a small inclined angle above the air inflow space 12 in the case 11 of the air conditioning unit 10 .
  • air blown from the blower unit flows into the air inflow space 12 , and passes through the evaporator 13 upwardly from bottom to top.
  • low-pressure refrigerant reduced in pressure by a pressure reducing unit such as an expansion valve of a refrigeration cycle flows into the evaporator 13 and absorbs heat from the air, thereby being evaporated.
  • An air mixing door 14 and a hot water type heater core 15 serving as a heat exchanger for heating are arranged above the evaporator 13 (on a downstream side of air flow).
  • the air mixing door 14 is constructed of a cantilever plate door pivoting on a rotary shaft 14 a.
  • the heater core 15 heats air by using hot water (i.e., engine-cooling water) of a vehicle engine as a heat source. Then, this heater core 15 is also arranged approximately in a horizontal direction, that is, approximately in parallel to the evaporator 13 .
  • the heater core 15 is smaller in a cross-sectional area than an air passage in the case 11 and is arranged nearer to the front side of the vehicle in the case 11 . With this arrangement, a cold air passage 16 through which air (cold air) bypassing the heater core 15 flows is formed on the rear side of the vehicle (i.e., position nearer to a passenger seat) of the heater core 15 .
  • the air mixing door 14 is turned in a front-rear direction of the vehicle between the evaporator 13 and the heater core 15 to open or close an inlet air passage 15 a of the heater core 15 and the cold air passage 16 .
  • This air mixing door 14 it is possible to adjust the air volume ratio between hot air (arrow “a”) passing through the inlet air passage 15 a and heated by the heater core 15 , and cold air (arrow “b”) passing through the cold air passage 16 . Therefore, the temperature of air blown into the passenger compartment can be adjusted by operation of the air mixing door 14 .
  • a temperature adjustment unit for adjusting the temperature of air blown into the passenger compartment is constructed of the air mixing door 14 .
  • the rotary shaft 14 a of the air mixing door 14 is rotatably supported by bearing holes (not shown) made in left and right side walls of the case 11 .
  • One end of the rotary shaft 14 a is protruded out from the case 11 and is connected to an air mixing door operating mechanism.
  • An actuator mechanism using a motor is typically employed as this air mixing door operating mechanism, but in place of the actuator mechanism, a manually operated mechanism can be employed.
  • a hot air guide wall 17 is integrally molded with the case 11 at a specified spacing above the heater core 15 , and a hot air passage 18 is formed between this hot air guide wall 17 and the top surface of the heater core 15 .
  • the hot air passing through the heater core 15 is guided by the hot air guide wall 17 , thereby flowing through the hot air passage 18 toward the rear side of the vehicle as shown by arrow “a”.
  • a tip bent portion 17 a that is bent downward is formed at a portion on the rear side of the vehicle of the hot air guide wall 17 .
  • the hot air from the hot air passage 18 is guided downward in a slanting direction by the tip bent portion 17 a , the hot air collides opposite to the cold air flowing upward through the cold air passage 16 , as shown by arrow “b”, thereby enhancing the mixing of the cold air and the hot air.
  • An air mixing portion 19 where the cold air and the hot air are mixed is formed above the cold air passage 16 .
  • a defroster opening 20 is open at a portion on the front side of the vehicle in the top surface of the case 11
  • a face opening 21 is open at a portion on the rear side of the vehicle of the defroster opening 20 in the top surface of the case 11 .
  • Each of these defroster opening 20 and the face opening 21 is rectangular and, to be more specific, is shaped like a rectangle having long sides in the width direction of the vehicle and short sides in the front-rear direction of the vehicle.
  • the defroster opening 20 is made so as to blow off conditioned air from the air mixing portion 19 toward inside surface of the front windshield of the vehicle. Then, the face opening 21 is made so as to blow off conditioned air from the air mixing portion 19 toward the upper bodies of passengers.
  • Front seat side foot openings 22 are open at portions above the air mixing portion 19 in the side walls on both the left and right sides in the width direction of the vehicle of the case 11 . These front seat side foot openings 22 on both the left and right sides are made so as to blow off conditioned air from the air mixing portion 18 toward the feet of passengers on the front seats (driver and passenger on the passenger seat).
  • the front seat side foot opening 22 is shaped nearly like a triangle having a sharp top portion as shown in FIG. 4 to FIG. 7.
  • a rear seat side foot opening 23 is open in a wall surface 11 a below the front seat side foot openings 22 and on the rear side of the vehicle of the case 11 .
  • This rear seat side foot opening 23 always communicates with the front seat side foot openings 22 through a rear seat side foot air passage 24 .
  • This rear seat side foot air passage 24 is formed between the wall surface 11 a on the rear side of the vehicle of the case 11 and a wall surface 11 b for defining the cold air passage 16 .
  • the wall surface 11 b is located inside the wall surface 11 a on the front side of the vehicle.
  • an air-outlet mode selecting mechanism (i.e., mode selecting device) is constructed of first and second rotary doors 25 , 26 .
  • the front seat side foot openings 22 are opened and closed by the first rotary door 25
  • the defroster opening 20 and the face opening 21 are opened and closed by the second rotary door 26 .
  • a communication passage 37 is formed adjacent to the vehicle front side of the front seat side foot openings 22 .
  • the defroster opening 20 and the face opening 21 communicate with the air mixing portion 19 through this communication passage 37 .
  • the first rotary door 25 opens and closes also the communication passage 37 when it opens and closes the front seat side foot opening 22 .
  • the first and second rotary doors 25 , 26 are different from each other in outside dimension and the like but are basically equal to each other in door construction.
  • the first rotary door 25 is used as an example, and the rotary door construction will be now described in detail with reference to FIG. 2.
  • the first rotary door 25 is integrally constructed of left and right rotary shafts 25 a, 25 b, left and right fan-shaped side plates 25 c, 25 d, and an outer peripheral door surface 25 e.
  • the left and right rotary shafts 25 a, 25 b are formed to protrude outside of the left and right sides at the pivots of the fan-shaped left and right side plates 25 c, 25 d, and are rotatably supported by the bearing holes (not shown) of the left and right side walls of the case 11 .
  • the outer peripheral door surface 25 e is joined to outer peripheral end portions of the left and right fan-shaped side plates 25 c, 25 d, so that the left and right fan-shaped side plates 25 c, 25 d and the outer peripheral door surface 25 e are formed into a gate shape (like a horseshoe or a U-shape).
  • a space inside the gate shape is always open to a space in the case 11 , so air can freely pass through the space inside the gate shape in a direction shown by the arrow “c” (in a direction perpendicular to a direction of the rotary shaft).
  • each of the left and right fan-shaped side plates 25 c, 25 d is formed to be slightly curved inside in the direction of the rotary shaft to increase its strength. Then, the outer peripheral door surface 25 e is located at a position separated by a predetermined distance in the radial direction (outward in the radial direction) of the rotary shafts 25 a, 25 b from the centers of the rotary shafts 25 a, 25 b . Further, the outer peripheral door surface 25 e is extended in a rotation direction of the rotary door 25 to have a predetermined wall area.
  • the outer peripheral door surface 25 e of this embodiment is shaped, in cross section, like an arc having a center at the rotary shafts 25 a, 25 b, and is formed in flat shape into a rectangle having long sides in the width direction of the vehicle and short sides in the front-rear direction of the vehicle.
  • the first rotary door 25 including the rotary shafts 25 a, 25 b, the fan-shaped side plates 25 c, 25 d and the outer peripheral door surface 25 e which have been described above is integrally molded of resin having high mechanical strength and a set elasticity, for example, polypropylene.
  • a door seal structure is of the lip seal type so as to reduce a door operating force.
  • Collar-shaped portions 25 f, 25 g are integrally molded to protrude outside on the surfaces of the outer peripheral door surface 25 e and the side plates 25 c, 25 d that construct the door base parts of the door 25 .
  • Seal parts 25 h, 25 i are fixed to these collar-shaped portions 25 f, 25 g.
  • One seal part 25 h is located at one end in the rotation direction of the door base part, and the other seal part 25 i is located at the other end in the rotation direction of the door base part.
  • both the seal parts 25 h, 25 i are formed in such a way as to expand in a V-shape from the pivots of the fans (positions where the rotary shafts 25 a, 25 b are arranged) of the side plates 25 c, 25 d, respectively.
  • Both of the seal parts 25 h, 25 i are made of elastic material and protruded outside in the shape of lip (thin plate) from the collar-shaped portions 25 f, 25 g . Both of the seal parts 25 h, 25 i are protruded in the V-shape in cross section from the surfaces of the collar-shaped portions 25 f, 25 g . As shown in FIG. 2, when being viewed from a direction of an air flow inside the rotary door shown by the arrow “c”, both the seal parts 25 h, 25 i are formed into a gate shape (like a horseshoe) as its whole shape, just as with the whole shape of the rotary door 25 .
  • both the seal parts 25 h, 25 i can be integrally molded and thereby fixed to the collar-shaped portions 25 f, 25 g while the door base part of the first rotary door 25 is molded.
  • the rotary door 26 is formed into the shape of FIG. 2, similarly to the rotary door 25 .
  • the rotary door 26 includes rotary shafts 26 a , 26 b , fan-shaped side plates 26 c , 26 d and the outer peripheral door surface 26 e.
  • seal surfaces 27 , 28 , 29 are integrally provided on portions on both front and rear sides in the front-rear direction of the vehicle of the front seat side foot opening 22 (portions on both front and back sides in the rotation direction in which the first rotary door 25 ) and on the upper surface of the tip bent portion 17 a of the hot air guide wall 17 (see FIG. 1).
  • the seal parts 25 h, 25 i of the first rotary door 25 are elastically deformed by and pressed onto the three seal surfaces 27 , 28 , 29 , respectively.
  • Each of the three seal surfaces 27 , 28 , 29 is shaped like a gate corresponding to the whole gate shape of each of the seal parts 25 h, 25 i, so that the whole gate shape of each of the seal parts 25 h, 25 i press-contacts the three seal surfaces 27 , 28 , 29 .
  • a the rear side portion (outside the door) of a lip portion forming the rear seal part 25 h of the first rotary door 25 is pressed onto the rear side seal surface 27 located on the rear side in the front-rear direction of the vehicle (in the rotation direction) among the seal surfaces 27 , 28 , 29 .
  • a middle seal surface 28 located at the middle in the front-rear direction of the vehicle (in the door rotation direction) forms seal surfaces on both the front and rear sides in the front-rear direction of the vehicle, and a rear side (inside the door) of a lip portion forming the front seal part 25 i of the first rotary door 25 is pressed onto the front side surface of the middle seal surface 28 .
  • FIG. 5 shows the foot mode where the first rotary door 25 totally closes the communication passage 37 and fully opens the front seat side foot opening 22 .
  • seal surfaces 30 , 31 , 32 are integrally formed with the case 11 on the front side portion of the defroster opening 20 in the front-rear direction (in the door rotation direction), on a middle portion between the defroster opening 20 and the face opening 21 , and on the rear side portion of the face opening 21 in the front-rear direction (in the door rotation direction), respectively.
  • the seal parts 26 h , 26 i of the second rotary door 26 are elastically deformed by and pressed onto these three seal surfaces 30 , 31 , 32 .
  • each of the seal surfaces 31 , 32 is shaped like a gate corresponding to the whole gate shape of each of the seal parts 26 h , 26 i , and the whole gate-shaped portion of each of the seal parts 26 h , 26 i is pressed onto each of the seal surfaces 31 , 32 .
  • the remaining seal surface 30 is formed on the top surface of the hot air guide wall 17 located at the lower portion of the defroster opening 20 and hence is shaped like a simple flat plane.
  • the whole gate shape of the seal part 26 i is also pressed onto the seal surface 30 .
  • a lip portion on the front side (outside) of an approximate V-shaped lip portion for forming the front seal part 26 i of the second rotary door 26 is pressed onto the seal surface 30 as shown in FIG. 1.
  • the middle seal surface 31 located at the middle portion between the defroster opening 20 and the face opening 21 forms seal surfaces on both of the front and rear sides in the front-rear direction of the vehicle.
  • a lip portion of on the front side (inside the door) of an approximate V-shaped lip portion for forming the rear side seal part 26 h of the second rotary door 26 is pressed onto the rear side surface of the middle seal surface 31 as shown in FIG. 1.
  • the first and second rotary doors 25 , 26 construct an air-outlet mode selecting device for selecting an air outlet mode, and are operated in synchronization with each other by a common air-outlet mode door operating mechanism (not shown).
  • a common air-outlet mode door operating mechanism (not shown).
  • any one of the rotary shafts 25 a, 25 b on both the left and right sides of the first rotary door 25 and any one of the rotary shafts 26 a , 26 b on both left and right sides of the second rotary door 26 are protruded outside any one of the left and right side walls of the case 11 and the protruded portions of these rotary shafts are connected to the common air-outlet mode door operating mechanism via a link mechanism.
  • An actuator mechanism using a motor is typically used as this common air-outlet mode door operating mechanism. However, in place of the actuator mechanism, a manually operated mechanism can be used.
  • FIG. 3 is a cross-sectional view taken on the line III-III in FIG. 1.
  • a slanting surface 18 a spreading outside in the left and right direction of the hot air passage 18 formed above the heater core 15 is integrally formed with the left and right side walls of the case 11 .
  • This slanting surface 18 a is formed in the shape smoothly expanding outside in the left and right direction toward the rear side of the vehicle.
  • This slanting surface 18 a extends to pass the left and right outside portions of the air mixing portion 19 formed above the cold air passage 16 , and extends toward the rear side of the vehicle.
  • the front seat side foot openings 22 , 22 on the left and right sides are arranged at the portions extended to the vehicle rear side of the slanting surface 18 a .
  • a hot air bypass passage 33 through which the left and right outside portions of the hot air passage 18 directly communicate with the front seat side foot openings 22 , 22 can be formed inside the left and right portions of the slanting surface 18 a .
  • a surface 18 b with a step is for forming a bottom surface of the hot air bypass passage 33 and protrudes outside to the left and right at a height position near the air mixing portion 19 .
  • FIG. 1 shows a state in a face mode in which both the front and rear seal parts 25 h, 25 i of the rotary door 25 in the rotation direction are elastically pressed onto the case side seal surfaces 27 , 28 at the front and back of the front seat side foot openings 22 , 22 .
  • each of the seal surfaces 27 , 28 has a gate shape (like a horseshoe, U-shape), and both the seal parts 25 h, 25 i each having the gate shape (a letter C) of the first rotary door 25 are pressed onto the whole seal surfaces 27 , 28 , respectively.
  • the first rotary door 25 opens the communication passage 37 , and the gate-shaped inside space of the first rotary door 25 makes a space through which an air mixing portion 19 communicates with the communication passage 37 .
  • air on the side of the air mixing portion 19 directly flows into the communication passage 37 , and passes through the inside space of the first rotary door 25 and flows into the communication passage 37 .
  • both the seal parts 26 h , 26 i at the front and back in the rotation direction of the second rotary door 26 are elastically pressed onto the case side seal surfaces 31 , 30 , respectively.
  • the second rotary door 26 the defroster opening 20 is completely closed and the face opening 21 is fully opened.
  • conditioned air from the communication passage 37 is blown off only from the face opening 21 toward the upper haft body of a passenger.
  • FIG. 1 there is shown a maximum cooling state where the air mixing door 14 fully closes the inlet air passage 15 a of the heater core 15 and fully opens the cold air passage 16 in the face mode.
  • the whole volume of cold air cooled by the evaporator 13 passes through the cold air passage 16 and is blow from the face opening 21 toward the upper half body of the passenger.
  • FIG. 4 shows a state of a bi-level mode in which the first rotary door 25 is turned clockwise by a predetermined angle from the position shown in FIG. 1.
  • the rear seal part 25 h of the first rotary door 25 is positioned at a middle position between the case side seal surfaces 27 , 28 at the front and back of the front seat side foot openings 22 , 22 .
  • the passages of the front seat side foot openings 22 , 22 and the communication passage 37 are brought into a half-open state.
  • the second rotary door 26 keeps the position shown in FIG. 1 as it is, so the defroster opening 20 is kept in a completely closed state and the face opening 21 is kept in a fully opened state.
  • air from the air mixing portion 19 flows to the passages of the front seat side foot openings 22 , 22 and at the same time passes through the communication passage 37 and flows also into the face opening 21 .
  • air from the air mixing portion 19 flows to the passages of the front seat side foot openings 22 , 22 and at the same time passes through the communication passage 37 and flows also into the face opening 21 .
  • the bi-level mode is used mainly in a middle temperature season of spring and autumn. For this reason, the air mixing door 14 is operated to a middle turning position between the maximum cooling position shown by the solid line in FIG. 1 and the maximum heating position shown by the double dot and dash line in FIG. 1 to adjust the air temperature blown into the passenger compartment to a middle temperature range.
  • the passages of the front seat side foot openings 22 , 22 are nearer to the cold air passage 16 than the hot air passage 18 .
  • the hot air bypass passage 33 shown in FIG. 3 is not formed, cold air in the cold air passage 16 readily flows to the passages of the front seat side foot openings 22 , 22 and hot air in the hot air passage 18 readily flows to the face opening 21 .
  • the temperature of air blown off toward the face of the passenger is higher than the temperature of air blown off toward the feet of the passenger.
  • air conditioning feeling in the bi-level mode is deteriorated.
  • hot air in the hot air passage 18 can directly be introduced into the passages of front seat side foot openings 22 , 22 .
  • the volume of cold air flowing to the passages of the front seat side foot openings 22 , 22 from the cold air passage 16 can be reduced, and the volume of hot air flowing to the passages of the face openings 21 from the hot air passage 18 can be reduced.
  • the volume of cold air flowing toward the face opening 21 can be increased, and there can be provided a comfortable up/down air temperature distribution of a type of keeping passenger's head cool and feet warm by making the temperature of air blown off toward the face of the passenger lower than the temperature of air blown off toward the feet of the passenger.
  • air conditioning feeling in the bi-level mode can be improved.
  • FIG. 5 shows a state in a foot mode.
  • the first rotary door 25 is further turned clockwise by a predetermined angle from the position shown in FIG. 4, so that both the seal parts 25 h, 25 i of the first rotary door 25 are elastically pressed onto the case side seal surfaces 28 , 29 at the front and back of the communication passage 37 , respectively.
  • the communication passage 37 is brought into a closed state and the passages of the front seat side foot openings 22 , 22 on the left and right sides are brought into a fully opened state.
  • both the openings 20 , 21 are brought into a closed state irrespective of the rotation position of the second rotary door 26 .
  • the second rotary door 26 is anticlockwise turned by a predetermined angle from the position shown in FIG. 4 in synchronization with the rotational displacement of the first rotary door 25 .
  • both the seal parts 26 h , 26 i of the second rotary door 26 are elastically pressed onto the case side seal surfaces 32 , 31 at the front and back of the face opening 21 , respectively, so the face opening 21 is completely closed and the defroster opening 20 is fully opened.
  • the inside space of the first rotary door 25 serves as an air passage for flowing air from the air mixing portion 19 toward the front seat side foot openings 22 , 22 .
  • air from the air mixing portions 19 flows directly to the front seat side foot openings 22 , 22 , and is introduced into the inside space of the first rotary door 25 toward the front seat side foot openings 22 , 22 .
  • the foot mode is used for blowing off hot air toward the feet of the passengers mainly in a heating operation.
  • a maximum heating state can be set in which the inlet air passage 15 a of the heater core 15 is fully opened and in which the cold air passage 16 is completely closed.
  • the whole volume of air is heated by the heater core 15 to make it hot air and this hot air can be blown off toward the feet of the passengers on the front seat and the rear seat through the front seat side foot openings 22 , 22 and the rear seat side foot opening 23 .
  • FIG. 6 shows a state in a foot/defroster mode.
  • the first rotary door 25 is turned anticlockwise by a predetermined angle from the position shown in FIG. 5, thereby being moved to the same position as in the bi-level mode shown in FIG. 4.
  • both of the passages of the front seat side foot openings 22 , 22 and the communication passage 37 are brought into a half-open state by the first rotary door 25 .
  • the second rotary door 26 is kept at the position shown in FIG. 5 as it is, so the defroster opening 20 is kept in a fully opened state and the face opening 21 is kept in a completely closed state.
  • air from the air mixing portion 19 flows into the passages of the front seat side foot openings 22 , 22 and at the same time flows through the communication passage 37 and the inside space of the second rotary door 26 also into the defroster opening 20 .
  • air from the air mixing portion 19 flows into the passages of the front seat side foot openings 22 , 22 and at the same time flows through the communication passage 37 and the inside space of the second rotary door 26 also into the defroster opening 20 .
  • This air blown to the inside surface of the front windshield of the vehicle can prevent fogging of the front windshield of the vehicle.
  • FIG. 7 shows a state in a defroster mode.
  • the first rotary door 25 is further turned anticlockwise by a predetermined angle from the position shown in FIG. 6, thereby being moved to the same position as in the face mode shown in FIG. 1.
  • the second rotary door 26 is kept at the position shown in FIG. 6 as it is, so the defroster opening 20 is kept in a fully opened state and the face opening 21 is kept in a completely closed state.
  • the air passage on the air mixing portion 19 side communicates with only the defroster opening 20 through the communication passage 37 and the inside space of the second rotary door 26 .
  • the whole volume of air from the air mixing portion 19 is blown off toward the inside surface of the front windshield of the vehicle to increase a defogging capacity of the front windshield of the vehicle in a maximum level.
  • the first and second rotary doors 25 , 25 are used as doors for selecting the air outlet modes, a force required to select the air outlet modes can be reduced. That is, in the first and second rotary doors 25 , 26 , because the outer peripheral surfaces 25 e , 26 e are turned around the rotary shafts 25 a, 25 b, 26 a , 26 b in a direction perpendicular to an air flow to open or close the respective openings 20 , 21 , 22 , the outer peripheral door surfaces 25 e , 26 e neither need to be turned against the air flow as in the case of the cantilever plate door nor undergoes influence of the self weight of the door.
  • the lip seal type seal parts 25 h, 25 i, 26 h , 26 i of the first and second rotary doors 25 , 26 are pressed onto the case side seal surfaces 27 to 32 only when the first and second rotary doors 25 , 26 are brought to the positions where the respective openings 20 , 21 , 22 are completely closed. While the first and second rotary doors 25 , 26 are being turned, the lip seal type seal parts 25 h, 25 i, 26 h , 26 i are separated from the case side seal surfaces 27 to 32 , so sliding friction is not caused on the seal parts by turning the first and second rotary doors 25 , 26 . Thus, it is possible to effectively reduce an operating force required to select the air outlet mode as compared with an air outlet mode door using a cantilever plate door.
  • the first rotary door 25 is shaped like the gate by the outer peripheral door surface 25 e and the side plates 25 c, 25 d, and the rotary shafts 25 a, 25 b are arranged in such a way as to protrude outside in the left and right direction.
  • the second rotary door 26 is shaped like the gate by the outer peripheral door surface 26 e and the side plates 26 c , 26 d , and the rotary shafts 26 a , 26 b are arranged in such a way as to protrude outside in the left and right direction.
  • the spaces inside the first and second rotary doors 25 , 26 have no protruding portion preventing the air flow formed therein and hence can be used, just as they are, as passages through which air flows to the respective openings 20 , 21 , 22 . Therefore, as compared with an air-outlet mode door using a butterfly door, the first and second rotary doors 25 , 26 according to this embodiment can reduce the air flow resistance and increase the volume of air blown off from the respective openings 20 , 21 , 22 and reduce air blast noises (whizzing noises in the air).
  • the first and second rotary doors 25 , 26 of the first embodiment of the present invention a phenomenon in which cold air is separated from hot air as in the case with the butterfly door is not caused. Therefore, it is possible to reduce variations in the temperature of air blown off from the respective openings 20 , 21 , and 22 .
  • the first rotary door 25 is formed into the gate shape constructed with the outer peripheral door surface 25 e and the side plates 25 c, 25 d.
  • the first rotary door 25 opens and closes the air passage between the gate-shaped inside space and its outside space. Therefore, the opening 22 can be arranged on both of the outer peripheral side of the outer peripheral door surface 25 e and the left and right sides of the side plates 25 c, 25 d.
  • the second rotary door 26 is formed into the gate shape constructed with the outer peripheral door surface 26 e and the side plates 26 c , 26 d .
  • the second rotary door 26 opens and closes the air passage between the gate-shaped inside space and its outside space. Therefore, the openings 20 , 21 can be arranged on both of the outer peripheral side of the outer peripheral door surface 26 e and the left and right sides of the side plates 26 c , 26 d .
  • the left and right foot openings 22 , 22 can be arranged on the outsides in the left and right direction of the side plates 25 c, 25 d of the first rotary door 25 .
  • the upstream air passage of the first rotary door 25 can be made to communicate in line with the left and right foot openings 22 , 22 to effectively reduce pressure loss caused by a bent passage to the foot openings 22 , 22 . Therefore, the volume of air blown off toward the feet of the passengers can be increased.
  • the air-outlet mode selecting mechanism is provided with the two first and second rotary doors 25 , 26 . Further, the first rotary door 25 opens and closes the foot openings 22 , 22 and the second rotary door 26 opens and closes the defroster opening 20 and the face opening 21 .
  • the foot openings 22 , 22 can independently be formed in arbitrary positions without regard to the turning path of the outer peripheral door surface 26 e of the second rotary door 26 (that is, positions where the defroster opening 20 and the face opening 21 are arranged).
  • first and second rotary doors 25 , 26 can be gradually reduced in size as compared with a single rotary door for opening and closing all three air outlet openings 20 , 21 , 22 . Combined with the above-described features, it is possible to improve the mounting performance of the air conditioning unit in the vehicle.
  • hot air in the hot air passage 18 can directly be introduced into the passages of the front seat side foot openings 22 , 22 by using the hot air bypass passage 33 shown in FIG. 3, it is possible to provide a comfortable up/down air temperature distribution of the type of keeping passenger's head cool and feet warm.
  • This air temperature distribution is obtained by making the temperature of air blowing off from the face opening 21 in the bi-level mode or the temperature of air blown off from the defroster opening 20 in the foot/defroster mode lower than the temperature of air blown off from the foot openings 22 .
  • a region where the first rotary door 25 is turned and a region where the second rotary door 26 is turned are set independently from each other.
  • any one of the first and second rotary doors 25 , 26 is arranged in a stacked manner inside the other rotary door. In this manner, the region where the first rotary door 25 is turned partially overlaps the region where the second rotary door 26 is turned.
  • FIG. 8 and FIG. 9 show the second embodiment.
  • FIG. 9 is a cross-sectional view taken on the line IX-IX in FIG. 8.
  • a length L1 in an axial direction of the outer peripheral door surface 25 e of the first rotary door 25 is made a specified length shorter than a length L2 in the axial direction of the outer peripheral door surface 26 e of the first rotary door 26 .
  • the gate-shaped first rotary door 25 constructed of the outer peripheral door surface 25 e and the left and right side surfaces 25 c, 25 d is arranged in an inside space of the gate-shaped second rotary door 26 constructed of the outer peripheral door surface 26 e and the left and right side surfaces 26 c , 26 d.
  • the first rotary door 25 is located at a lower position in the vertical direction of the vehicle and the second rotary door 26 is located at an upper position in the vertical direction of the vehicle, whereby the first and second rotary doors 25 , 26 are arranged in a stacked manner.
  • the rotary shafts 25 a, 25 b of the first rotary door 25 are located at lower positions in the vertical direction of the vehicle and the rotary shafts 26 a , 26 b of the second rotary door 26 are located at upper positions in the vertical direction of the vehicle.
  • the total rotational operation region of both the first and second rotary doors 25 , 26 can be reduced as compared with that of the first embodiment. Therefore, the positions where the defroster opening 20 and the face opening 21 are formed can be set near to the position where the front seat side foot openings 22 , 22 are formed. This arrangement can reduce the whole size of the air conditioning unit 10 and can further improve the mounting performance of the air conditioning unit 10 in the vehicle.
  • hot air in the hot air passage 18 can directly be introduced into the passages of the front seat side foot openings 22 , 22 .
  • the third embodiment of the present invention will be now described with reference to FIG. 10.
  • the third embodiment is different in the arrangement of the air outlet openings 20 , 21 , 22 from the first and second embodiments. That is, in the third embodiment, as shown in FIG. 10, the foot openings 22 are arranged at portions near the uppermost portions of the left and right side walls of the case 11 and on the rear side of the vehicle of the defroster opening 20 .
  • the face opening 21 is arranged at a portion adjacent to the air mixing portion 19 of the wall surface on the rear side of the vehicle of the case 11 .
  • an air-outlet mode is usually selected in the order of (1) face mode ⁇ (2) bi-level mode ⁇ (3) foot mode ⁇ (4) foot/defroster mode ⁇ (5) defroster mode, relative to the operating direction of the actuator mechanism or the manual operation mechanism of the air-outlet mode door operation mechanism.
  • the respective openings are arranged in the order of the face opening 21 ⁇ the foot opening 22 ⁇ the defroster opening 20 from the upstream side to the downstream side in the air flow of the case 11 .
  • the air-outlet mode is selected from (1) to (5), the first rotary door 25 is turned in the following order.
  • the first rotary door 25 is turned in the following manner: (1) in the face mode, the face opening 21 is in the full-open state and the communication passage 37 is in the completely closed state; next, (2) in the bi-level mode, the face opening 21 and the communication passage 37 are brought to a half-open state; next, (3) in the foot mode, the face opening 21 is brought to a completely closed state and the communication passage 37 is brought to a full-open state; further, (4) in the foot/defroster mode, the same opening positions as in the foot mode are held; and (5) in the defroster mode, the same opening positions as in the foot mode are held.
  • the second rotary door 26 is turned in the following manner: (1) in the face mode, the foot opening 22 is brought to a full-open state and the defroster opening 20 is brought to a completely closed state; next, (2) in the bi-level mode, the same positions as in the face mode openings are held; next, (3) in the foot mode, the same opening positions as in the face mode are held; further, (4) in the foot/defroster mode, the foot opening 22 and the defroster opening 20 are brought to a half-open state; and (5) in the defroster mode, the foot opening 22 is brought to a completely closed state and the defroster opening 20 is brought to a full-open state.
  • the first rotary door 25 is turned by one half of its total rotational angle in the order of the full-open state ⁇ the half-open state ⁇ the totally closed state of the face opening 21 . Then, after the first rotary door 25 is brought to the state where the face opening 21 is totally closed, that is, after the operation is switched to the foot mode, the second rotary door 26 is turned by one half of its total rotational angle in the order of the full-open state ⁇ the half-open state ⁇ the totally closed state of the foot opening 22 .
  • first and second rotary doors 25 , 26 are turned by the one half of the respective total rotational angles at shifted timings. Thus, this can effectively reduce the force required to turn the first and second rotary doors 25 , 26 .
  • the fourth embodiment of the present invention will be now described with reference to FIG. 11.
  • the arrangement of the air outlet openings 20 , 21 , 22 is further changed as compared with that of the third embodiment. That is, in the fourth embodiment, as shown in FIG. 11, the foot opening 22 is arranged on the front side of the vehicle of the defroster opening 20 .
  • hot air in the hot air passage 18 is U-turned at the tip bent portion 17 a of the hot air guide wall 17 , and then is pushed by the cold air flow from the cold air passage 16 , thereby easily flowing to the foot opening 22 on the front side of the vehicle.
  • the face opening 21 is provided adjacent to the cold air passage 16 , cold air in the cold air passage 16 originally easily flows to the face opening 21 .
  • the face opening 21 is divided into a center face opening and a side face opening.
  • the center face opening is connected to a center face air outlet port located at the center in the left and right direction of the instrument panel of the vehicle, and the side face opening is connected to side face air outlet ports located near the left and right side ends of the instrument panel of the vehicle.
  • the foot/defroster mode and the defroster mode which are mainly used in winter, hot air is blown off to the side windshields of the vehicle from the side face air outlet ports so as to prevent the portion near to the windshield of the upper half body of the passenger from feeling cold by the radiation of cold heat from the windshield at a low temperature, and to perform a defogging function of the side windshields.
  • the object of the fifth embodiment is to keep the side face opening of the face opening 21 at the open state in all air outlet modes in the air-outlet mode selecting mechanism for opening and closing the defroster opening 20 , the face opening 21 and the foot opening 22 by the combined use of the first and second rotary doors 25 , 26 .
  • FIG. 12 to FIG. 14 show the fifth embodiment of the present invention.
  • the fifth embodiment has the same arrangement of the defroster opening 20 , the face opening 21 and the foot opening 22 as the above-described first embodiment.
  • the foot opening 22 and the communication passage 37 are opened and closed by the first rotary door 25
  • the defroster opening 20 and the face opening 21 are opened and closed by the second rotary door 26 .
  • FIG. 13 is a top view of the left half portion of the air conditioning unit 10 (case 11 )
  • FIG. 14 shows a left half portion of the second rotary door 26 , corresponding to the left half portion of the air conditioning unit 10 .
  • the face opening 21 is divided into a center face opening 21 a located at the center in the width direction of the vehicle and side face openings 21 b located on the left and right sides of the center face opening 21 a in the top surface of the case 11 .
  • the side face openings 21 b on both of the left and right sides are separated from the center face opening 21 a by a partition wall 21 c , and conditioned air from the air mixing portion 19 flows through the communication passage 37 and then independently flows to the center face opening 21 a and the side face openings 21 b.
  • the center face opening 21 a is connected to a center face air outlet port located at the center in the width direction of the instrument panel of the vehicle via a center face duct (not shown). Then, the side face openings 21 b are connected to side face air outlet ports located near left and right side ends of the instrument panel of the vehicle via a side face duct (not shown).
  • FIG. 12 and FIG. 13 It is illustrated in FIG. 12 and FIG. 13 that the foot opening 22 is directly open to the passenger compartment. However, actually, a foot duct (not shown) is connected to the foot opening 22 and guides air in the foot opening 22 downward to the left and right sides of the case 11 .
  • FIGS. 14A to 14 C illustrate a specific example of the second rotary door 26 in accordance with the fifth embodiment.
  • the example has the same rotary door structure as the first embodiment in which an arc-shaped outer peripheral door surface 26 e , side parts 26 c , 26 d and seal parts 26 h , 26 i are provided in the second rotary door 26 at portions corresponding to the center face opening 21 a in the width direction of the vehicle.
  • the above-described elements 26 e , 26 d , 26 h , 26 i are not provided at the portions corresponding to the side face openings 21 b on the left and right sides, but only the rotary shafts 26 a , 26 b and an air volume adjusting plate 26 j are provided. According to this construction, the side face openings 21 b on the left and right sides are not totally closed by the second rotary door 26 but always kept in the open state.
  • FIG. 14B shows only the left side face opening 21 b and does not show the right side face opening 21 b , so it does not show the right side part 26 d , the right rotary shaft 26 b , and the right air volume adjusting plate 26 j of the second rotary door 26 .
  • the right elements can be provided symmetrically to the left elements.
  • the air volume adjusting plate 26 j is provided similarly to a cantilever plate door and is integrally turned with the left and right rotary shafts 26 a , 26 b of the second rotary door 26 to change the passage areas of the left and right side face openings 21 b . Therefore, an air volume blown from the left and right side face openings 21 b can be adjusted in response to a change in the air outlet mode.
  • FIG. 12 shows the air conditioning unit 10 in the foot mode in accordance with the fifth embodiment.
  • the first rotary door 25 is operated to a rotational position where the foot opening 22 is nearly fully opened and where the communication passage 37 is slightly opened.
  • a major part of conditioned air (hot air) from the air mixing portion 19 flows to the foot opening 22 and a part of conditioned air (hot air) from the air mixing portion 19 is branched to the communication passage 37 as shown by the arrow “e”.
  • the second rotary door 26 is turned to the position shown in FIG. 12 where the seal parts 26 h , 26 i are pressed onto the case side seal surfaces 31 , 32 located at the front and back sides of the center face opening 21 a to totally close the center face opening 21 a .
  • the portion of the second rotary door 26 corresponding to the side face openings 21 b , are not provided with seal parts 26 h , 26 i , the side face openings 21 b on the left and right sides are not totally closed by the second rotary door 26 but are always kept at the open state.
  • the conditioned air branched to the communication passage 37 flows into the side face openings 21 b on the left and right sides as shown by the arrow “f” and passes through the side face openings 21 b on the left and right sides and then is blown off from the side face air outlet ports (not shown) to the vicinity of the side windshields of the vehicle.
  • This can prevent the portion on the windshield side of the passenger's upper half body from feeling cold by the radiation of cold heat from the windshield at a low temperature. This can also produce an effect of preventing fogging of the side windshields of the vehicle.
  • the communication passage 37 communicates with the defroster opening 20 through the inside space of the second rotary door 26 , a part of conditioned air flows also to the defroster opening 20 as shown by arrow “g” and is blown off to the front windshield of the vehicle to produce an effect of preventing fogging of the front windshield of the vehicle.
  • FIG. 15 to FIG. 21 show the sixth embodiment.
  • FIG. 15 and FIG. 16 show a state in the foot mode in which air is stopped from blowing off from the defroster opening 20 in the sixth embodiment
  • FIG. 20 and FIG. 21 show a state in the foot mode in which air is blown off also from the defroster opening 20 in the sixth embodiment.
  • FIG. 15 and FIG. 20 correspond to FIG. 12 in the above-described fifth embodiment
  • FIG. 16 and FIG. 21 correspond to FIG. 13 in the above-described fifth embodiment
  • FIGS. 17A to 17 C correspond to FIGS. 14A to 14 C in the above-described fifth embodiment.
  • FIG. 18 shows a state where the second rotary door 26 is dismounted to clearly show the shapes of the case side seal surfaces 32 a , 32 b , 31 a , 31 b in the center face opening 21 a and in the side face openings 21 b
  • FIG. 19 shows a state where the second rotary door 26 is mounted and shows the arrangement of the seal parts 26 h , 26 i of the second rotary door 26 .
  • the second rotary door 26 has a first outer peripheral door surface 26 e having a large radius (distance) from the center of the rotary shaft 26 a ( 26 b ) and a second outer peripheral door surface 26 e ′ having a smaller radius (distance) from the center of the rotary shaft 26 a ( 26 b ) than the first outer peripheral door surface 26 e.
  • the second rotary door 26 is formed in the shape having a step part 26 k in the radial direction between the first outer peripheral door surface 26 e and the second outer peripheral door surface 26 e ′.
  • the first outer peripheral door surface 26 e is arranged in correspondence to the center face opening 21 a of the face opening 21 and the second outer peripheral door surface 26 e ′ is arranged in correspondence to the side face openings 21 b.
  • the seal parts 26 h , 26 i are fixed to the peripheral portions of the first and second outer peripheral door surfaces 26 e , 26 e ′, the step part 26 k and the side parts 26 c ( 26 d ).
  • the side face openings 21 b are formed in such a manner that they protrude outside in the width direction of the vehicle by a specified length L3 from the defroster opening 20 in the top surface of the case 11 .
  • the second outer peripheral door surface 26 e ′ of the second rotary door 26 is arranged in correspondence to a range where the defroster opening 20 is formed, among the side face openings 21 b .
  • the second outer peripheral door surface 26 e ′ is not arranged in the range of the specified length L3 in the side face openings 21 b.
  • the case side seal surfaces 32 b , 31 b in the side face openings 21 b are also formed only in an area corresponding to the range where the defroster opening 20 is formed and are not formed in the range of the specified length L3.
  • the case side seal surfaces 32 a , 31 a in the center face opening 21 a are also similarly shown by the shaded portions.
  • FIG. 19 shows a case where one side seal part 26 h of the second rotary door 26 is located on the case side seal surfaces 32 a , 32 b and that the other one side seal part 26 i of the second rotary door 26 is located on the bottom surface side of the case side seal surfaces 31 a , 31 b .
  • the side face openings 21 b always keeps the open state irrespective of the rotational position of the second rotary door 26 .
  • the shaded portion in FIG. 19 shows the seal part 26 h.
  • bypass passage 34 through which the upstream side of the first rotary door 25 directly communicates with the range of the above-described specified length L3 of the side face openings 21 b (portion always keeping the open state).
  • This bypass passage 34 is formed between the lower side of the seal surface 29 on the front side of the vehicle among the case side seal surfaces 27 , 28 , 29 provided in correspondence to the first rotary door 25 , and a tip portion on the rear side of the vehicle of the hot air guide wall 17 .
  • a space extending at a predetermined spacing in the width direction of the vehicle is formed between the seal surface 29 on the front side of the vehicle and the tip portion on the rear side of the vehicle of the hot air guide wall 17 , and the rear side of the vehicle of this space communicates with the air mixing portion 19 .
  • both side end portions in the left and right direction of this space communicate with the portions having the above-described length L3 and being always open among the side face openings 21 b on both the left and right sides.
  • the bypass passage 34 can be formed.
  • the upstream portion (near the air mixing portion 19 ) of the first rotary door 25 can directly communicate with the always open portions having the above-described length L3 among the side face openings 21 b on both the left and right sides.
  • the sixth embodiment it is possible to selectively set a first foot mode without air blown from the defroster opening 20 and a second foot mode having air blown from the defroster opening 20 .
  • the first rotary door 25 and the second rotary door 26 are operated to the rotational position shown in FIG. 15.
  • the first rotary door 25 is turned to a position where the foot opening 22 is fully opened and where the communication passage 37 on the upstream side of the second rotary door 26 is totally closed. Then, the second rotary door 26 is turned to a position where both the seal parts 26 h , 26 i on the front and back sides of the second rotary door 26 are pressed onto the case side seal surfaces 32 a , 31 a in the center face opening 21 a and the case side seal surfaces 32 b , 31 b in the side face opening 21 b , respectively.
  • the main stream of air from the air mixing potion 19 is blown to the passenger's feet from the foot opening 22 .
  • a part of air from the air mixing portion 19 is directly introduced through the bypass passage 34 into the always open portions having the specified length L3 of the left and right side openings 21 b .
  • air is introduced into the side face air outlet ports located on the left -and right side end portions of the instrument panel from the side face openings 21 b on the left and right sides, and is blown off from this air outlet ports to the vicinity of the left and right side windshields.
  • the first rotary door 25 is turned to the rotational position shown in FIG. 20. That is, the first rotary door 25 is anticlockwise turned by a small angle from the position shown in FIG. 15 to slightly open the communication passage 37 and to nearly fully open the foot opening 22 .
  • the second door 26 is kept at the same rotational position shown in FIG. 15.
  • the outer peripheral door surfaces 25 e , 26 e , 26 e ′ of the first and second rotary doors 25 , 26 are shaped like an arc having its center at the rotary shafts 25 a, 25 n , 26 a , 26 b , respectively.
  • the sealing functions of the rotary doors 25 , 26 can be performed by the seal parts 25 h, 25 i, 26 h , 26 i .
  • the outer peripheral door surfaces 25 e , 26 e , 26 e ′ can be formed into a flat shape.
  • the thermoplastic elastomer is used as the material of the seal parts 25 h, 25 i, 26 h , 26 i of the rotary doors 25 , 26 .
  • the outer peripheral door surfaces 25 e , 26 e , the side plates 25 c, 25 d, 26 c , 26 d and the rotary shafts 25 a, 25 b, 26 a , 26 b , which construct the base part of the rotary doors 25 , 26 are molded of resin, the seal parts 25 h, 25 i, 26 h , 26 i are integrally molded with them.
  • packing members previously molded of foaming resin or the like be used as the seal parts 25 h, 25 i, 26 h , 26 i and may be fixed to the peripheral portions of the base part of the rotary doors 25 , 26 with an adhesive or the like.
  • the air mixing door 14 is constructed of the cantilever plate door has been described in the above-described first embodiment.
  • the air mixing door 14 can be constructed of a sliding door or a flexible film door that does not turn but moves back and forth.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)
US10/700,721 2002-11-05 2003-11-04 Vehicle air conditioner Abandoned US20040093884A1 (en)

Priority Applications (1)

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JP2002321267A JP4089390B2 (ja) 2002-11-05 2002-11-05 車両用空調装置
JP2002-321267 2002-11-05

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US11/881,174 Expired - Fee Related US7806172B2 (en) 2002-11-05 2007-07-26 Vehicle air conditioner

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JP (1) JP4089390B2 (ja)
DE (1) DE10351409B4 (ja)
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US20040152410A1 (en) * 2003-01-23 2004-08-05 Hideki Seki Air passage switching device and vehicle air conditioner using the same
US20040211552A1 (en) * 2003-04-25 2004-10-28 Hideki Seki Air passage switching device and vehicle air conditioner using the same
US20060030255A1 (en) * 2004-07-26 2006-02-09 Denso Corporation Air passage opening and closing device and air conditioner for vehicle use
US20060094346A1 (en) * 2004-11-03 2006-05-04 Visteon Global Technologies, Inc. Air stream mixing conduit in an air handling module
US20060196205A1 (en) * 2005-02-22 2006-09-07 Gerald Richter Air conditioning unit
US20070181295A1 (en) * 2005-10-07 2007-08-09 Denso Corporation Automotive air conditioning system
US20070204985A1 (en) * 2006-03-01 2007-09-06 Denso Corporation Vehicle air conditioner with rotary door
US20080223546A1 (en) * 2005-11-10 2008-09-18 Jaehoon Lee Air Conditioner for Vehicles Having Two Layer Air Flow Installed Therein
US20090068939A1 (en) * 2007-06-28 2009-03-12 Masaharu Onda Automotive air conditioner
US20090209189A1 (en) * 2003-06-30 2009-08-20 Behr Gmgh & Co. Kg Air-Conditioning System for Vehicles
US20140054388A1 (en) * 2011-03-07 2014-02-27 Behr Gmbh & Co. Kg Air-diverting element with a flow-optimized contour for an air-conditioning system
US9180752B2 (en) 2012-10-09 2015-11-10 Denso International America, Inc. Rotary mode door for constant demist bleed
US20180105015A1 (en) * 2016-10-14 2018-04-19 Hanon Systems Multi-planar air diverter
US20180251006A1 (en) * 2015-11-12 2018-09-06 Mitsubishi Heavy Industries Thermal Systems, Ltd. Vehicular air conditioning device
US10493817B2 (en) 2013-12-17 2019-12-03 Denso Corporation Air conditioning unit
US11458806B2 (en) * 2019-05-03 2022-10-04 Hanon Systems HVAC inlet with ram air and partial recirculation function

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JP4506639B2 (ja) * 2005-10-19 2010-07-21 株式会社デンソー 空気通路開閉装置および車両用空調装置
JP5107622B2 (ja) * 2006-08-22 2012-12-26 カルソニックカンセイ株式会社 自動車用空調装置
FR2930223B1 (fr) * 2008-04-22 2010-04-02 Renault Sas Convergent lateral pour une structure de face avant de vehicule,structure de face avant correspondante,et procede de montage d'une telle structure.
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US9610823B2 (en) * 2008-09-25 2017-04-04 Mahle International Gmbh Vehicle HVAC temperature control system
JP5199842B2 (ja) * 2008-11-18 2013-05-15 カルソニックカンセイ株式会社 空調風吹き出し機構
JP4883080B2 (ja) * 2008-12-26 2012-02-22 株式会社デンソー 車両用空調装置
JP5459237B2 (ja) * 2011-01-28 2014-04-02 株式会社デンソー 車両用空調装置
JP5724768B2 (ja) * 2011-09-03 2015-05-27 株式会社デンソー 車両用空調装置
EP2610092B1 (en) * 2011-12-26 2018-11-21 Calsonic Kansei Corporation Vehicle air conditioner
WO2016103639A1 (ja) * 2014-12-22 2016-06-30 株式会社デンソー 車両用空調装置
JP6421776B2 (ja) * 2016-03-18 2018-11-14 株式会社デンソー 車両用空調装置
JP7195173B2 (ja) * 2019-02-18 2022-12-23 株式会社日本クライメイトシステムズ 車両用空調装置
WO2022230759A1 (ja) * 2021-04-28 2022-11-03 株式会社ヴァレオジャパン 車両用空調装置

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6852024B2 (en) * 2003-01-23 2005-02-08 Denso Corporation Air passage switching device and vehicle air conditioner using the same
US20040152410A1 (en) * 2003-01-23 2004-08-05 Hideki Seki Air passage switching device and vehicle air conditioner using the same
US20040211552A1 (en) * 2003-04-25 2004-10-28 Hideki Seki Air passage switching device and vehicle air conditioner using the same
US6913529B2 (en) * 2003-04-25 2005-07-05 Denso Corporation Air passage switching device and vehicle air conditioner using the same
US20090209189A1 (en) * 2003-06-30 2009-08-20 Behr Gmgh & Co. Kg Air-Conditioning System for Vehicles
US20060030255A1 (en) * 2004-07-26 2006-02-09 Denso Corporation Air passage opening and closing device and air conditioner for vehicle use
US7214130B2 (en) * 2004-07-26 2007-05-08 Denso Corporation Air passage opening and closing device and air conditioner for vehicle use
US20060094346A1 (en) * 2004-11-03 2006-05-04 Visteon Global Technologies, Inc. Air stream mixing conduit in an air handling module
US7074122B2 (en) 2004-11-03 2006-07-11 Visteon Global Technologies, Inc. Air stream mixing conduit in an air handling module
US7735330B2 (en) * 2005-02-22 2010-06-15 Visteon Global Technologies, Inc. Air conditioning unit
US20060196205A1 (en) * 2005-02-22 2006-09-07 Gerald Richter Air conditioning unit
US20070181295A1 (en) * 2005-10-07 2007-08-09 Denso Corporation Automotive air conditioning system
US7950444B2 (en) 2005-10-07 2011-05-31 Denso Corporation Automotive air conditioning system
US8544533B2 (en) * 2005-11-10 2013-10-01 Halla Climate Control Corporation Vehicular air conditioner having two-layered air flow
US20080223546A1 (en) * 2005-11-10 2008-09-18 Jaehoon Lee Air Conditioner for Vehicles Having Two Layer Air Flow Installed Therein
US7857041B2 (en) 2006-03-01 2010-12-28 Denso Corporation Vehicle air conditioner with rotary door
US20070204985A1 (en) * 2006-03-01 2007-09-06 Denso Corporation Vehicle air conditioner with rotary door
US8403735B2 (en) * 2007-06-28 2013-03-26 Calsonic Kansei Corporation Automotive air conditioner
US20090068939A1 (en) * 2007-06-28 2009-03-12 Masaharu Onda Automotive air conditioner
US9533548B2 (en) * 2011-03-07 2017-01-03 Mahle International Gmbh Air-diverting element with a flow-optimized contour for an air-conditioning system
US20140054388A1 (en) * 2011-03-07 2014-02-27 Behr Gmbh & Co. Kg Air-diverting element with a flow-optimized contour for an air-conditioning system
US9180752B2 (en) 2012-10-09 2015-11-10 Denso International America, Inc. Rotary mode door for constant demist bleed
US10493817B2 (en) 2013-12-17 2019-12-03 Denso Corporation Air conditioning unit
US20180251006A1 (en) * 2015-11-12 2018-09-06 Mitsubishi Heavy Industries Thermal Systems, Ltd. Vehicular air conditioning device
US10195920B2 (en) * 2015-11-12 2019-02-05 Mitsubishi Heavy Industries Thermal Systems, Ltd. Vehicular air conditioning device
US20180105015A1 (en) * 2016-10-14 2018-04-19 Hanon Systems Multi-planar air diverter
US10525790B2 (en) * 2016-10-14 2020-01-07 Hanon Systems Multi-planar air diverter
US11458806B2 (en) * 2019-05-03 2022-10-04 Hanon Systems HVAC inlet with ram air and partial recirculation function

Also Published As

Publication number Publication date
JP4089390B2 (ja) 2008-05-28
DE10351409A1 (de) 2004-05-19
FR2846600B1 (fr) 2011-02-11
US7806172B2 (en) 2010-10-05
DE10351409B4 (de) 2013-10-24
US20070266721A1 (en) 2007-11-22
JP2004155263A (ja) 2004-06-03
FR2846600A1 (fr) 2004-05-07

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