JP2006036004A - Air-conditioner unit for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioner unit for a vehicle of the center-placed, consolidated type including two air conduits configured so that an increase of air quantity in another conduit is avoided even in case the air quantity of one conduit is decreased in controlling the air quantities to the conduits independently, thereby capable of eliminating necessity for an air quantity control for the other conduit. <P>SOLUTION: The air conduits 15 and 17 independent of each other are formed as extending from downstream of a fan 19 of a blower machine 18 and partitioned by a partitioning wall 17 and are furnished with respective openings 27 in parts downstream of the fan and upstream of an evaporator 4 about the air blow, wherein the openings 27 are opened and closed appropriately by an air quantity control door 28 to release the desired quantity of air to outside the conduits 15 and 16 from the openings 27, and thereby the air quantity sent to the part after the evaporator 4 is controlled. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air-conditioning unit for a center-mounted vehicle that allows independent left and right air volume control.

  Conventionally, there are a plurality of fans, and independent air flow paths are provided on the downstream side of these fans, and temperature control means for controlling the temperature of air flowing in the flow paths is provided in each air flow path. By adopting the arrangement, temperature control and air distribution control can be performed independently for multiple air conditioning zones, such as the air conditioning zone on the driver's seat and the air conditioning zone on the passenger seat. Vehicle air conditioners are already known (see, for example, Patent Document 1).

In addition, the air conditioner is of a type that employs a blower composed of one fan and a motor, and the air flow path is branched into a plurality of air flow paths on the downstream side of the blower, and an air volume distribution door at this branching portion. By adjusting the opening of the air volume distribution door, the air volume sent to one branch air flow path is made to be relatively larger than the air volume sent to the other branch air flow path. A vehicle air conditioner that can vary the amount of air sent to the flow path is already known (see, for example, Patent Document 2).
JP 2004-9754 A JP 2002-347429 A

  However, in the structure of the vehicle air conditioner shown in Patent Document 1, the amount of air sent from one fan to the downstream air flow path and the amount of air sent from the other fan to the downstream air flow path are relative to each other. Therefore, it is necessary to change the rotational speeds of both fans. Therefore, it is necessary to drive the fans with different motors, and it is difficult to adopt a fan driven by a coaxial motor.

  Moreover, when using the air blower provided with two fans with respect to the structure of the vehicle air conditioner shown in patent document 2, each air flow path is from the inside / outside air introduction port to the temperature control means on the downstream side of the fan. Since the air flow path does not have a structure that branches in the middle, it is difficult to install the air volume distribution door at the branch portion. Furthermore, even if it is possible to make a structure that branches in the middle of the air flow path, since a certain amount of air flow is distributed, when it is desired to reduce only the air amount sent to one branch air passage, the other This excess air flows into the other branch air flow path, the air volume sent to the other branch air flow path increases, and it is difficult to adjust the left and right air flow. In addition, the ventilation resistance of the branch air flow path on one side is increased, and as a result, the load on the blower unit portion is also increased, and the efficiency of the motor of the blower is deteriorated. Furthermore, since the blower unit portion is arranged in an offset state with respect to the temperature control unit portion, it is not possible to meet the current market needs for downsizing the mounting space of the air conditioning unit.

  Therefore, in the vehicle air conditioning unit integrated with the center, the present invention can increase or decrease the amount of air sent to each air guide passage independently of the other air guide passage even when the air amount of one air guide passage is reduced. An object of the present invention is to provide a vehicle air conditioning unit that can avoid an increase in the air volume and that can easily control the left and right independent air volumes.

  A vehicle air-conditioning unit according to the present invention accommodates at least a blower composed of a fan and a motor, and has a blower unit portion having an inside / outside air introduction port for introducing inside / outside air and a switching door for appropriately selecting the inside / outside air introduction port. And a cooling device that has a temperature guide that extends from the downstream side of the fan of the blower and has a plurality of air guide paths defined by a partition wall and that controls the temperature of the air introduced from the blower unit. And a temperature control unit portion that is disposed across the plurality of air guide paths, and a part of the air guide path that is downstream of the fan and upstream of the temperature control means. Further, an opening that can be appropriately opened and closed by an opening and closing means is provided (claim 1).

  And the vehicle air-conditioning unit according to the present invention comprises, for the blower, one motor and two fans attached to shaft portions extending on both sides in the axial direction of the motor. The path from the inlet of the blower unit through the inlet of the fan to the portion where the temperature control means is accommodated is independent from the other air ducts. 2).

  Furthermore, the vehicle air conditioning unit according to the present invention is provided with a passage portion constituting a route different from the air guide passage in the pre-temperature control unit portion, and one end side of the passage portion is formed in the air guide passage. It is connected to the opening, and the other end side of the passage is open to the suction port side of the fan of the blower (Claim 3). It should be noted that the position of the fan inlet is a position where air from the inside air inlet or outside air from the outside air inlet can be sucked.

  According to the present invention, in one air guide passage, the air sent from the fan is released from the opening to the outside of the air guide passage on the upstream side of the cooling heat exchanger constituting the temperature control means. Therefore, it is not necessary to drop the rotation of the motor of the blower in order to reduce the amount of air in one of the air guide passages, so that the other air guide passage can secure the necessary air amount without performing air amount control. .

  In particular, according to the second aspect of the present invention, since air flows independently in each air guide path by using a plurality of fans, even if the air volume in one air guide path is reduced, another air guide path is used. Since excess air does not flow into the interior and the air volume does not increase, it is possible to prevent an increase in air resistance in other air ducts and, in turn, an increase in the load on the motor of the blower. Efficiency can be increased. Further, since the two fans are driven by one motor, energy saving can be achieved relatively compared to the case where two motors are used, and the cost is reduced by reducing the number of parts.

  In particular, according to the third aspect of the present invention, when the air fed from the fan is allowed to escape from the opening to the outside of the air guide path, the air is not discharged to the vehicle interior space, but is passed through the passage portion, and the fan suction port. Since the efficiency of the motor of the blower can be increased and the burden on the motor can be reduced, the noise can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3, two air conditioners that are mounted on a vehicle and independently control the air conditioning of a right seat side air conditioning zone (driver seat side air conditioning zone) and a left seat side air conditioning zone (passenger seat side air conditioning zone). An air conditioning unit 1 having a system is shown.

  This air conditioning unit 1 is of a center-placed type disposed in the approximate center of the vehicle, and integrally includes a blower unit portion 2 and a temperature control unit portion 3. Among these, the temperature control unit 3 includes a temperature control means, mode switching doors 7, 8, composed of an evaporator 4 as a heat exchanger for cooling, an air mix door 5, a heater core 6 as a heat exchanger for heating, and the like. A blowing mode switching means such as 9 is housed in the casing 10, and the foot blowing opening 11, the vent blowing opening 12, the side vent blowing opening 13, and the differential blowing opening (not shown) are provided in the casing. 10 is open.

  The inside of the temperature control unit 3 is divided into a driver seat side air guide passage 15 and a passenger seat side air guide passage 16 that extend in the front-rear direction of the vehicle. After extending so as to be close to each other from the downstream side of the fan 19 described below toward the lower side of the vehicle, the fan 19 extends substantially in parallel in the front-rear direction of the vehicle. By partitioning with a partition wall 17 extending in the front-rear direction of the vehicle, the passages are completely independent from each other.

  The evaporator 4 and the heater core 6 are common to both the air guide paths 15 and 16 and are arranged so that the effective heat exchange areas in the air guide paths 15 and 16 are equal. That is, the evaporator 4 is disposed across both the air guide paths 15 and 16 so as to block the entire cross section of the driver seat side air guide path 15 and the passenger seat side air guide path 16. On the other hand, the heater core 6 is disposed across the air guide paths 15 and 16 so as to block substantially half of each air guide path. The air mix doors 5, 5 exist for each of the air guide paths 15, 16, and a support shaft is provided at the corner on the upstream side of the heater core 6, and is provided to be rotatable toward the evaporator 4 by this support shaft. Rotating over a range from a full hot position (opening degree 100%) that guides all the air that has passed through the evaporator 4 to the heater core 6 to a full cool position (opening degree 0%) that bypasses the heater core 6. Yes.

  The blower unit portion 2 is disposed on the upstream side of the evaporator 4 with respect to the temperature control unit portion 3 and on the upper side in the vehicle vertical direction with respect to the evaporator 4. Thereby, compared with the case where a blower unit part and a temperature control unit part are arrange | positioned in an offset state, for example along a vehicle width direction, the required mounting area of the air-conditioning unit 1 can be reduced, and the vehicle compact now. Can be met.

  In the blower unit 2, the blower 18 is accommodated in the casing 10, and the inside / outside air introduction ports 22 and 23 are opened in the casing 10 in pairs. The blower unit 2 has an outside air introduction door 24, 24 for appropriately adjusting the opening degree of each inside / outside air introduction port 22, 23 according to each mode of the fresh mode and the inside air circulation mode. The casing 10 is housed in the casing 10 so as to be rotatable at a boundary portion between the inner air inlet 22 and the inside air inlet 23. In addition, in this embodiment, the structure of the inside / outside air switching door 24 is a flag type composed of a rotating shaft and a door body extending along the radial direction of the rotating shaft, but is not limited to this configuration. For example, it may be a sliding door type or a barrel type.

  The blower 18 includes two fans 19 and 19 arranged in parallel along the vehicle width direction, a motor 20 disposed between the fans 19 and 19, and a fan 19 extending from the motor 20 in a symmetric direction. Drive shafts 21 and 21 that transmit rotation to 19 are configured. That is, the motor 20 used for the blower 18 is a coaxial motor. Although not shown in particular, the suction ports of the fans 19 and 19 are opened on the opposite side of the motor 20 side, and both the air from the outside air introduction port 22 and the air from the inside air introduction port 23 are sucked in. Is in a possible position.

  By the way, this air-conditioning unit 1 includes passage portions 25 and 26 that form an air flow path different from the air guide paths 15 and 16 in order to return surplus air to the suction port of the fan 19 after the partition wall 17. It is formed so as to extend along a substantially vertical direction of the vehicle. The lower end sides of the passage portions 25 and 26 communicate with the air guide passage 15 or 16 through the opening 27. The opening 27 is provided with an air volume control door 28 so that the opening 27 can be opened and closed. The upper end sides of the passage portions 25 and 26 communicate with a portion near the suction port of the fan 19 of the blower unit portion 2 through the opening 29.

  In this embodiment, the air volume control door 28 is a flag type constituted by a rotating shaft and a door main body extending along the radial direction of the rotating shaft, but is not limited to this configuration. A mold, a barrel type, or a butterfly type may be used. The air volume control door 28 may be driven by manual control using a cable or automatic control using an actuator.

  According to the above configuration, the air volume control can be executed independently for a plurality of air conditioning zones such as the air conditioning zone on the driver's seat side and the air conditioning zone on the passenger seat side. , 19 from the state where both are used at the second speed, when it is intended to relatively increase only the amount of air flowing through the one air guide path 15 and being sent to the evaporator 4, the rotational speed of the motor 20 is reduced. While the fan 19 is raised to the third speed, the air volume control door 28 disposed in the vicinity of the opening edge of the opening 27 is rotated to appropriately open the opening 27, so that excess air is passed through the passage portion 26. Since the air is returned to the suction port side of the fan 19 through the air passage 16, the air volume sent to the evaporator 4 through the air guide passage 16 is not limited to the fan 19 even though the fan 19 is actually in the third speed. Can drop to 2nd gear Kill. In other words, it is not necessary to control the rotation of the fan 19 that sends air to the air guide path 16 so as to obtain a desired air volume in the air guide path 16.

  However, the configuration is not necessarily limited to the above-described configuration in which the surplus air is returned to the blower unit unit 2, and a configuration as shown in FIG. That is, an opening 27 is provided in a portion after the partition wall 17 of each of the air guide paths 15 and 16 and upstream of the evaporator 4, and the air volume control door 28 is disposed in the opening 27, while the passage portion 25. , 26 and the opening 29 communicating with the passage portions 25, 26 are not provided.

  Even with such a configuration, for example, from the state in which the two fans 19 and 19 are both used at the second speed, only the amount of air sent to the evaporator 4 through the one air guide path 15 is relatively increased. When trying to do so, the rotational speed of the motor 20 is increased so that the fan 19 becomes the third speed, while the air volume control door 28 disposed in the vicinity of the opening edge of the opening 27 is rotated to rotate the opening 27. Since the excess air is exhausted outside the air conditioning unit 1 (for example, in the passenger compartment) by appropriately opening the fan 19, the fan 19 in the air guide passage 16 is actually in the third speed, but the air guide passage 16 is opened. The amount of air sent through to the evaporator 4 can be reduced to the second speed of the fan 19.

  In the air conditioning unit 1 shown in FIG. 1 and FIG. 3, the outside air introduction port 22 is shown as having a plurality according to the number of the fans 19, but is not necessarily limited thereto, and has a plurality of fans 19. Even in this case, it may be configured to have one common outside air inlet.

  In addition, the configuration of the blower 18 has been described as a type in which two fans 19 are driven by one motor 20 in FIGS. 1 and 3. However, the present invention is not necessarily limited to this, and one motor 20 has one configuration. A blower 18 of a type that drives the fan 19 may be used. However, when the blower 18 having such a configuration is used, two partition walls prevent the air volume control of the air flowing through the other air guide path from affecting the air volume of the air flowing through the other air guide path. It is necessary to return the air after being divided into the air guide passages to the vicinity of the fan inlet or exhaust it into the passenger compartment.

FIG. 1 is a cross-sectional view of an internal configuration of an air conditioning unit according to the first embodiment of the present invention as viewed from the side of a vehicle. FIG. 2 is a partial cross-sectional view showing a configuration of a passage portion of the air conditioning unit same as above. FIG. 3 is a cross-sectional view showing the internal configuration of the air conditioning unit as seen from the blower unit side. FIG. 4 is a sectional view showing an internal configuration of an air conditioning unit according to the second embodiment of the present invention as seen from the blower unit side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air conditioning unit 2 Blower unit part 3 Temperature control unit part 4 Evaporator 5 Air mix door 6 Heater core 10 Casing 15 Air guide path 16 Air guide path 17 Partition wall 18 Blower 19 Fan 20 Motor 21 Drive shaft 22 Outside air inlet 23 Inside air inlet 24 switching door 25 passage portion 26 passage portion 27 opening portion 28 air volume control door

Claims (3)

A blower unit having at least a blower composed of a fan and a motor, and having an inside / outside air introduction port for introducing inside / outside air and a switching door for appropriately selecting the inside / outside air introduction port;
The heat exchanger for cooling which comprises the temperature control means which temperature-controls the air introduce | transduced from the said blower unit part while it has the air guide path extended from the downstream of the fan of the said air blower, and was defined by the partition wall And a temperature control unit part that is disposed across the plurality of air ducts,
An air conditioning unit for a vehicle, wherein an opening that can be appropriately opened and closed by an opening / closing means is provided in a portion of the air guide path downstream of the fan and upstream of the temperature control means. About the said air blower, when it comprises from one motor and two fans attached to the axial part extended to the axial direction both sides of this motor, each said air guide path is a fan's inside from the inside / outside air inlet of the said blower unit part. 2. The vehicle air conditioning unit according to claim 1, wherein a path from the suction port to the portion that houses the temperature control means through the discharge port is independent of other air guide paths. The pre-temperature control unit is provided with a passage portion that forms a route different from the air guide passage, and one end side of the passage portion is connected to the opening formed in the air guide passage, and the other end of the passage portion is provided. 3. The vehicle air conditioning unit according to claim 1, wherein an end side opens to a suction port side of a fan of the blower.

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