JP2007307974A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner capable of preventing degradation of the air-conditioning performance when the temperature of air sucked by a blower is affected by the outside temperature. <P>SOLUTION: A rear seat air-conditioner having a blower and a heat exchanger or the like in an air-conditioning case is arranged in in-trim spaces 5a, 5b between an outer panel and a side trim. The in-trim spaces have no other opening than a suction port in a cabin, and form substantially closed spaces. A ceiling face duct 15 extending to a ceiling is connected to a roof outlet 16 of the air-conditioning case to form a passage 19 of conditioned air. The passage has a leakage opening 20, and an opening/closing door 21 for opening/closing the leakage opening according to the air volume in the passage, or, the pressure is provided. In the maximum cooling mode, the opening/closing door is opened, a part of the conditioned air is discharged into the in-trim spaces from the leaking opening, and sucked again in the blower on the downstream side. The air convection in the in-trim spaces is promoted to drop the air temperature. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner disposed between a vehicle outer panel and a trim.

Conventionally, as a rear seat air conditioner arranged in the trim space between the outer panel of the vehicle and the trim, the air blower provided in this air conditioner is a double suction type, ensuring air volume and noise by the blower. There is a thing which aims at reduction of (for example, refer patent document 1).
JP-A-10-109516

  However, conventionally, the air conditioner is disposed in a sealed space between the outer panel on the outside of the vehicle and the inside of the trim on the vehicle interior side, and the air sucked from the vehicle interior by the blower provided in the air conditioner is not Then, the air is blown from the air conditioner to the duct connected to the seal and blown out again into the passenger compartment.

  At this time, the circulation of air in the sealed space is insufficient, and in summer, the air temperature in the sealed space between the air conditioner and the outer panel is higher due to the influence of heat received from the outer panel, There is a problem that the intake air temperature of the blower becomes high and the cooling performance efficiency becomes low. Such a decrease in air-conditioning performance due to the temperature outside the vehicle also occurs in winter.

  The present invention has been made in view of the above points, and an object of the present invention is to prevent the air intake performance from being deteriorated due to the intake air temperature of the blower being influenced by the temperature outside the vehicle.

  In order to achieve the above object, the present invention provides a trim inner space (5, 5a, 5b) between an outer panel (3) constituting an outer wall of a vehicle and a trim (4) constituting a vehicle interior wall. An air conditioning case (2) that forms a ventilation path (19) and an air conditioning case (2) that is arranged upstream of the air conditioning case (2) and sucks air from a vehicle interior suction port (10) formed in the trim (4). ) A blower (6) for blowing air, a heat exchanger (11, 12) disposed on the downstream side of the blower (6) in the air conditioning case (2), and a downstream side of the heat exchanger (11, 12) In the ventilation path (19), a leakage opening (20) provided to open to the trim inner space (5, 5a, 5b), and a leakage opening (when the air volume in the ventilation path (19) is large) 20) Open and close the leak opening (20) when the air volume is small The opening / closing control mechanism (21) that operates on the air conditioner is connected to the air conditioning case (2) on the downstream side of the leak opening (20), and is arranged so as to send air from the trim inner space (5, 5a, 5b) to the vehicle interior. And a duct.

  Thus, when the blower air volume is large, the opening / closing control mechanism (21) operates to open the leak opening (20), and the air passing through the heat exchanger (11, 12) is passed through the air passage (19). From the air conditioning case (2) to be formed, the air can flow into the trim inner space (5, 5a, 5b) and be sucked into the blower (6) again. As a result, the air after the heat exchanger (11, 12) is actively circulated while stirring the air in the trim inner space (5, 5a, 5b) outside the air conditioning case (2). The influence of the heat received from 3) can be reduced, and the air blower (6) sucks this air again, thereby preventing the air conditioning efficiency in the air conditioning case (2) from decreasing. As a result, when the blower air volume is large, for example, when rapid cooling is required, the cooling performance can be prevented from being lowered, and the passenger compartment can be rapidly cooled to improve the user's comfort.

  Also, when the blower air volume is small, the leakage opening (20) is closed and all the air after the heat exchangers (11, 12) is sent to the duct, thereby preventing the air flow from the duct from decreasing.

  The blower (6) is provided with a suction port (8) for sucking air to be blown into the air conditioning case (2) in the trim inner space (5, 5a, 5b) facing the outer panel (3). Thereby, the influence which the suction noise in a suction inlet has on a vehicle interior can be made small. Moreover, the air sucked into the blower (6) on the outer panel (3) side is air agitated by the air after the heat exchanger (11, 12) flowing from the leak opening (20), and the air conditioning case (2) It is possible to prevent the air conditioning performance from being deteriorated.

  In addition, a leak opening (20) is provided in a portion where the ventilation path (19) is formed in the vertical direction of the vehicle, and the opening / closing control mechanism (21) corresponds to the difference between its own weight and the pressure in the ventilation path (19) If the opening / closing operation is performed, the opening / closing of the leak opening (20) can be controlled with a simple configuration.

  Alternatively, when the opening / closing control mechanism (21) is urged in a closing direction by the urging means such as an elastic material, the ventilation path (19) regardless of the position of the leakage opening (20). The leakage opening (20) can be opened when the pressure inside is high, and the leakage opening (20) can be closed when the pressure inside the ventilation path (19) is small.

  Alternatively, the open / close control mechanism (21) can operate to open the leak opening (20) when the conditioned air blown into the vehicle compartment is in the maximum cooling state.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a top view illustrating a configuration of a rear seat air conditioner 1 of a vehicle according to the present embodiment. Moreover, FIG. 2 is a top view which shows the arrangement position in the one box car of the rear seat air conditioner 1, and FIG. 3 is a side view in FIG.

  The air conditioning case 2 forming the ventilation path 19 of the rear seat air conditioner 1 is disposed in the trim inner space 5 between the outer panel 3 constituting the outer wall of the vehicle and the trim 4 constituting the vehicle interior wall, and is air-conditioned. A vehicle interior side space 5 a is formed between the case 2 and the outer panel 3, and a vehicle interior side space 5 b is formed between the air conditioning case 2 and the trim 4. The air conditioning case 2 includes a blower 6, an evaporator 11, a heater core 12, an air mix door 13, and a mode door 18.

  A blower 6 accommodated in a scroll-shaped blower case 7 is disposed on the most upstream side of the air conditioning case 2. In the blower 6 of the present embodiment, the blower suction port 8 is disposed so as to face the outer panel 3 side opposite to the trim 4 on the vehicle interior side, and the blower motor 9 for rotating the blower 6 is located on the vehicle interior side. Has been placed. On the other hand, the trim 4 has a vehicle interior suction port 10 formed in the vicinity of the blower case 7. Thus, by providing the blower suction port 8 on the outer panel 3 side, the influence of the suction noise on the vehicle interior is reduced.

  In the air conditioning case 2, an evaporator 11 as a heat exchanger is disposed on the downstream side of the blower 6. The evaporator 11 cools the air by exchanging heat between the refrigerant passing through the inside and the air pressure-fed by the blower 6.

  In the air conditioning case 2, a heater core 12 and an air mix door 13 as heat exchangers are disposed on the downstream side of the evaporator 11. The heater core 12 exchanges heat between the engine cooling water and the cold air that has passed through the evaporator 11, and heats the cold air. The air mix door 13 is set to an arbitrary position (air mix mode) between a position (MAX HOT) for guiding the total air amount to the heater core 12 and a position (MAX COOL) for guiding the total air amount to the bypass flow path. be able to. And the position where the warm air and cold air which passed the heater core 12 and the bypass channel merge becomes the air mix chamber 14, and cold air and warm air are mixed here.

  Furthermore, on the downstream side of the air mix chamber 14, a roof outlet that guides the conditioned air mixed in the air mix chamber 14 to a roof side outlet (not shown) disposed near the ceiling via a ceiling face duct 15. 16 and a foot outlet 17 leading to a foot side outlet (not shown) arranged near the rear floor are arranged, and a mode door 18 is installed at this branch point.

  The mode door 18 controls the total air amount at an arbitrary position between these two modes: a roof air blowing mode for guiding the total air amount to the roof air outlet 16, a foot air blowing mode for guiding the total air amount to the foot air outlet 17. It is possible to select and set from three blowing modes including a bi-level mode that divides into a desired ratio.

  The air mix door 13 and the mode door 18 are each driven by an actuator (not shown) such as a motor, and the actuator and the blower motor 9 are controlled by an air conditioner ECU (not shown).

  In the present embodiment, as shown in FIGS. 2 and 3, the rear seat air conditioner 1 is disposed in the vicinity of the rear floor of the rear third row seat of the vehicle. Further, the ceiling face duct 15 connected to the roof outlet 16 on the downstream side of the rear seat air conditioner 1 is arranged in the vertical direction so as to pass through a pillar portion (not shown) of the vehicle, and the roof portion has a roof. A side outlet opening (not shown) is provided. Air-conditioned air is blown out to the occupant from the roof side blowing opening. 2 and 3, the rear seat air conditioner 1 is shown in a simplified manner.

  FIG. 4 is a view showing a cross section in the vehicle vertical direction of the connecting portion between the roof outlet 16 and the ceiling face duct 15 of the rear seat air conditioner 1. The roof outlet 16 and the ceiling face duct 15 are connected by a seal structure, and both form an air passage 19 for air fed by the blower 6.

  Further, in the present embodiment, a leak opening 20 is provided on the wall surface of the ventilation path 19, and opening / closing as an opening / closing control mechanism that opens and closes to open and seal the leak opening 20 outside the ventilation path 19. A door 21 is provided.

  In the present embodiment, the leak opening 20 is provided in the ceiling face duct 15 located on the downstream side of the heat exchanger of the rear seat air conditioner 1. The outer shape of the open / close door 21 is formed larger than the outer shape of the leak opening 20, and a hinge 22 that allows the open / close door 21 to rotate is provided outside the upper end of the leak opening 20. As a result, when the open / close door 21 is positioned in the vertical direction, the leak opening 20 is sealed, and a force larger than the weight of the open / close door 21 acts on the surface of the open / close door 21 to rotate, thereby opening the leak opening 20. Operates to open.

  Therefore, as shown in FIG. 4A, the open / close door 21 is closed so as to seal the leak opening 20 by its own weight when the air flow rate through the ventilation path 19 is small, that is, when the pressure is low. ing. At this time, the trim interior space 5 is the only opening of the vehicle interior suction port 10 provided in the trim 4, and therefore the air in the trim interior space 5 hardly flows and stays.

  Therefore, most of the air sucked by the blower 6 is air flowing from the passenger compartment through the passenger compartment inlet 10, and in the air conditioning case 2, this sucked air exchanges heat in the evaporator 11 and the heater core 12 that are heat exchangers. To be conditioned air. The conditioned air can pass through the ceiling face duct 15 without leakage from the ventilation path 19 to the outside of the ventilation path 19, that is, without reducing the air flow rate.

  On the other hand, at the time of MAX COOL, which is the maximum cooling time, the flow rate of air passing through the ventilation path 19 is maximized. At this time, the pressure in the ventilation path 19 becomes maximum, and this pressure opens the opening / closing door 21 against the dead weight of the opening / closing door 21 as shown in FIG. Thereby, a part of the conditioned air can be leaked from the inside of the ventilation path 19 to the outside of the ventilation path 19, that is, to the space between the air conditioning case 2, the outer panel 3 and the trim 4. The open / close door 21 has a maximum opening defined by a stopper 23 provided in the ceiling face duct 15, and the amount of air discharged from the leak opening 20 is thereby set.

  The conditioned air discharged from the leak opening 20 into the trim inner space 5 is, as indicated by an arrow in FIG. 1, the vehicle interior outside space 5 a and the vehicle interior side space between the air conditioning case 2, the outer panel 3 and the trim 4. It flows in 5b toward the blower suction port 8 side where the pressure is low. At this time, the air is agitated in the vehicle interior outside space 5a and the vehicle interior side space 5b, whereby high temperature air particularly affected by the outside air in the vehicle interior outside space 5a is cooled and sucked into the blower 6. .

  As a result, even if the outer panel 3 becomes hot due to the outside air, the temperature of the air pressure fed from the blower 6 to the evaporator 11 is suppressed to be relatively low, so that the heat exchange (cooling) capability in the air conditioning case 2 is prevented from being lowered. can do.

  Also, during MAX HOT, which is the maximum heating time, as in MAX COOL, the flow rate of air passing through the ventilation path 19 is maximized, and the open / close door 21 is opened accordingly, and the conditioned air is supplied from the leak opening 20. The portion is discharged into the trim inner space 5. Thereby, even if the outer panel 3 becomes low temperature due to the outside air, the temperature of the air pumped downstream from the blower 6 can be made relatively high, and the heat exchange (heating) capability in the air conditioning case 2 is reduced. Can be prevented.

  In the above embodiment, the open / close door 21 as the open / close control mechanism opens and closes according to the magnitude relationship between the weight of the open / close door 21 and the pressure in the ventilation path 19, but is not limited thereto. That is, the weight of the opening / closing door 21 itself is reduced, and an urging means such as a spring is provided on the hinge 22 so that the opening / closing door 21 is always closed by the urging means. And if the pressure in the ventilation path 19 becomes more than predetermined value, the elastic force of a spring should just be set so that the opening / closing door 21 may be opened by this pressure. In this case, the arrangement posture of the opening / closing door 21 is not necessarily in the vertical direction, and may be in the horizontal direction, for example.

  Alternatively, the opening / closing door 21 may be controlled to open / close by an actuator. That is, when the rear seat air conditioner 1 is subjected to MAX COOL control by the air conditioner ECU, the actuator of the open / close door 21 is also controlled to be opened by the air conditioner ECU. Further, at the end of the MAX COOL control, the air conditioner ECU can control the actuator of the open / close door 21 so as to close the leak opening 20.

  In the above embodiment, an example in which the blower suction port 8 of the single suction type blower 6 faces the outer panel 3 side is shown. However, the present invention is not limited to this, and both the suction type blower or the blower suction port is on the trim side. Either a single suction type blower (on the vehicle interior side) or any blower may be used.

  Moreover, in the said embodiment, although the example provided with both the evaporator 11 and the heater core 12 was shown as a heat exchanger with which the rear-seat air conditioner 1 is provided, not only this but only one may be provided.

  In the above-described embodiment, the air conditioning case 2 is shown as a straight line from the blower 6 to the outlets 16 and 17. However, the air conditioning case 2 is not limited to this, and depending on the vehicle structure, in the air passage direction. You may bend and comprise.

It is a top view which shows the structure of the air conditioner for backseats of embodiment. It is a top view which shows the arrangement position in the one box car of the rear seat air conditioner. FIG. 3 is a side view in FIG. 2. It is a figure which shows the cross section in the vehicle up-down direction of the connection part of the roof blower outlet of a rear seat air conditioner and a ceiling face duct, (a) shows the state in which the opening / closing door is closed, (b) is the opening / closing door Indicates open state.

Explanation of symbols

1 ... rear seat air conditioner, 2 ... air conditioning case, 3 ... outer panel, 4 ... trim,
5 ... Trim inner space, 5a ... Car interior outer space, 5b ... Car interior side space, 6 ... Blower,
15 ... ceiling face duct, 16 ... roof outlet, 19 ... ventilation path, 20 ... leak opening,
21 ... Opening / closing door (opening / closing control mechanism), 22 ... Hinge.

Claims (5)

A vehicle air conditioner disposed in a trim inner space (5, 5a, 5b) between an outer panel (3) constituting an outer wall of a vehicle and a trim (4) constituting a vehicle interior wall,
An air conditioning case (2) forming a ventilation path (19);
A blower (6) disposed upstream of the air conditioning case (2) and sucking air into the air conditioning case (2) by sucking air from a vehicle interior suction port (10) formed in the trim (4);
A heat exchanger (11, 12) disposed downstream of the blower (6) in the air conditioning case (2);
A leakage opening (20) provided on the downstream side of the heat exchanger (11, 12) in the ventilation path (19) so as to open to the trim inner space (5, 5a, 5b);
An open / close control mechanism (21) that operates to open the leak opening (20) when the air volume in the ventilation path (19) is large and close the leak opening (20) when the air volume is small; ,
A duct connected to the air conditioning case (2) on the downstream side of the leak opening (20) and arranged to send air into the vehicle compartment from the trim inner space (5, 5a, 5b);
A vehicle air conditioner comprising: The blower (6) includes a suction port (8) for sucking air to be blown into the air conditioning case (2) in the trim inner space (5, 5a, 5b), and the suction port is connected to the outer panel ( The vehicular air conditioner according to claim 1, which is provided facing 3). The leak opening (20) is provided in a portion where the ventilation path (19) is in the vertical direction of the vehicle,
3. The vehicle air conditioner according to claim 1, wherein the opening / closing control mechanism (21) performs the opening / closing operation in accordance with a difference between its own weight and a pressure in the ventilation path (19). The vehicle air conditioner according to claim 1 or 2, wherein the opening / closing control mechanism (21) is urged by an urging means in a direction to close the leak opening (20). The said opening / closing control mechanism (21) operates to open the leak opening (20) when the conditioned air blown into the vehicle interior is in a maximum cooling state. Vehicle air conditioner.

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