JP2009184495A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress generation of self-excitation vibration of a door in an air conditioner for a vehicle in which an end part in a movement direction of the door is overlapped with an air passage at intermediate opening of the air passage. <P>SOLUTION: The air conditioner is provided with a case 1 for forming the air passages 27, 28 at the inside; a plate-like door body 9 for opening the air passages 27, 28 by being moved by slide system; and feeding out mechanisms 13, 14 driven so as to feed out the door body 9. When the door body 9 is operated to an intermediate opening position of the air passages 27, 28, the end part in the movement direction of the door body 9 are overlapped with the air passages 27, 28, and a bending rigidity value per 10 mm width of the door body 9 is 25 μNm<SP>2</SP>or higher. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air conditioner in which an air passage is opened and closed by a door that slides so as to be sent out.

  Conventionally, the vehicle air conditioner of patent document 1 is known as this kind of air conditioner. This prior art includes a face / difference blowing door for switching the opening and closing of a differential blowing opening and a face blowing opening of an indoor air conditioning unit. This face / diff blowout door is configured such that an arcuate door body is slid by a gear rotating with a shaft.

  When this face / diff blowout door closes the differential blowout opening or the face blowout opening, the arcuate door body itself is pressed against the inner wall surface of the air conditioning unit case to ensure sealing performance.

  Further, when the face / diff blowout door is operated to the intermediate opening position of the opening, the moving direction end of the door body overlaps with the opening.

  On the other hand, in the vehicle air conditioner described in Patent Document 2, the sliding door is composed of two thin film films and a rectangular frame body in which one end sides of both films are fixed, and the frame body is driven. The film is moved by pushing it out.

  Patent Document 2 discloses a bending rigidity value necessary for the film to be sent out without buckling.

In the prior art of Patent Document 2, since the free end (tip portion) of the film is always stored in the film storage portion formed in the case, the free end (tip portion) of the film is opened. It does not polymerize with the part.
JP 2007-210366 A Japanese Patent No. 40000959

  In the former prior art, since the end of the door body in the moving direction overlaps with the opening, the end of the door body in the moving direction ends when the end of the door main body in the moving direction overlaps with the opening. At the same time as the part tries to expand to the leeward side due to the wind pressure, a force to return to the original shape is also generated, and depending on these balances, self-excited vibration is generated in the door body.

  Therefore, the present inventor paid attention to the bending stiffness value of the film disclosed in the latter prior art, and examined applying the bending stiffness value according to the latter prior art to the former prior art.

  However, according to the detailed examination of the present inventor, since the latter conventional technique is based on the premise that the free end (tip portion) of the film does not overlap with the opening, the bending rigidity value according to the latter conventional technique is determined based on the former conventional technique. Even when applied to the technology, it was found that the bending stiffness value was too small to suppress the occurrence of self-excited vibration.

  On the other hand, if the bending rigidity value of the door body is too large, it is difficult to press the door body against the inner wall surface of the air conditioning unit case when the opening is closed, and a gap is easily generated between the door body and the inner wall surface of the air conditioning unit case. As a result, it was found that the sealing performance was lowered.

  In view of the above points, an object of the present invention is to suppress self-excited vibration of a door in an air conditioner in which an end of the door in the moving direction overlaps with the air passage when the air passage is at an intermediate opening degree.

  Another object of the present invention is to ensure sealability in an air conditioner in which the end of the door in the moving direction overlaps with the air passage when the air passage is at an intermediate opening degree.

  In addition, in view of the above points, the present invention provides an air conditioner in which the end of the door in the moving direction overlaps with the air passage when the air passage is at an intermediate opening degree, and suppresses self-excited vibration of the door and secures the sealing property. The other purpose is to achieve both.

In order to achieve the above object, in the invention according to claim 1, a case (1) in which an air passage (27, 28) is formed inside,
A plate-like door body (9) that moves by a sliding method to open and close the air passages (27, 28);
A delivery mechanism (13, 14) that drives the door body (9) to be delivered;
When the door body (9) is operated to the intermediate opening position of the air passage (27, 28), the moving direction end of the door body (9) is overlapped with the air passage (27, 28). ,
A bending rigidity value per 10 mm width of the door body (9) is 25 μNm ² or more.

  Thereby, generation | occurrence | production of a self-excited vibration can be suppressed (refer FIG. 4 mentioned later).

In the invention according to claim 2, a case (1) in which an air passage (27, 28) is formed inside,
A plate-like door body (9) that moves by a sliding method to open and close the air passages (27, 28);
A delivery mechanism (13, 14) that drives the door body (9) to be delivered;
When the door body (9) is operated to the intermediate opening position of the air passage (27, 28), the moving direction end of the door body (9) is overlapped with the air passage (27, 28). ,
The bending rigidity value per 10 mm width of the door body (9) is 3800 μNm ² or less.

  Thereby, the sealing property can be ensured (see FIG. 4 described later).

In the invention according to claim 3, case (1) which forms an air passage (27, 28) inside,
A plate-like door body (9) that moves by a sliding method to open and close the air passages (27, 28);
A delivery mechanism (13, 14) that drives the door body (9) to be delivered;
When the door body (9) is operated to the intermediate opening position of the air passage (27, 28), the moving direction end of the door body (9) is overlapped with the air passage (27, 28). ,
The bending rigidity value per 10 mm width of the door body (9) is 25 to 3800 μNm ² .

  As a result, the occurrence of self-excited vibration can be suppressed and the sealing property can be secured (see FIG. 4 described later).

  Further, as in the invention according to claim 4, in the air conditioner according to any one of claims 1 to 3, the door body (9) is operated to an intermediate opening position of the air passage (27, 28). When it is done, it can be suitably used for an air conditioner adapted to strike the air flow in a direction substantially orthogonal to the moving direction end of the door body (9).

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

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating an internal configuration of an air conditioning unit case 1 according to the vehicle air conditioner of the present embodiment. FIG. 1 shows an internal configuration particularly in the face mode. In FIG. 1, the front, rear, upper and lower arrows indicate directions in a vehicle-mounted state.

  The vehicle air conditioner according to the present embodiment is configured to be able to automatically or manually control the air conditioning in the passenger compartment, and includes a sliding door that opens and closes an air passage formed in the air conditioning unit case 1. .

  The air conditioning unit that constitutes the vehicle air conditioner includes an air conditioning unit case 1 as an outer shell, and roughly includes a blower unit and an air conditioning unit. The air conditioning unit case 1 is disposed on the back side of the instrument panel in front of the passenger compartment. The air conditioning unit case 1 corresponds to the case in the present invention.

  The air conditioning unit case 1 is composed of a plurality of case members, and is a resin molded product such as polypropylene, for example. The plurality of case members are integrally coupled by fastening means such as metal springs and screws to constitute the air conditioning unit case 1.

  The blower unit includes a blower 2 for blowing air inside or outside the vehicle compartment to the air conditioning unit, and the blower outlet of the blower 2 is connected to a blower passage leading to the inlet of the air conditioning unit. The blower 2 includes a centrifugal multiblade fan and a motor that drives the centrifugal multiblade fan, and the periphery of the centrifugal multiblade fan is surrounded by a scroll casing, and communicates with the blower passage by a duct extending in the centrifugal direction of the centrifugal multiblade fan.

  The air-conditioning unit includes an evaporator 3 provided by horizontally closing the entire air passage, a heater core 5 that heats air that has passed through the evaporator 3, an air volume that passes through the heater core 5, and an air volume that bypasses the heater core 5 and flows. An air mix door 4 that adjusts the air volume ratio, an air mix chamber, a defroster opening 28, a face opening 27, a front foot opening 7, and a rear foot opening 6 that are opened downstream of the air mix chamber. I have.

  The defroster opening 28 is a defroster blowing opening for blowing conditioned air along the side of the vehicle interior such as the front window glass, and the degree of fogging of the front window glass or the like is reduced by the conditioned air. The face opening 27 is a face blowing opening for blowing conditioned air toward the upper body of the occupant, and is mainly used during cooling.

  The front foot opening 7 and the rear foot opening 6 are openings for blowing conditioned air to the feet of the front seat occupant and the rear seat occupant, respectively, and are mainly used during heating. The conditioned air blown out from each blowing opening is supplied into the vehicle interior through a connected duct (not shown).

  The air conditioning unit further includes a face defroster door D for adjusting the opening area of the defroster opening 28 and the face opening 27, a foot door 8 for adjusting the opening area of the passage leading to the front foot opening 7 and the rear foot opening 6, and It has. The face defroster door D corresponds to the door in the present invention.

  In this example, the operations of the blower 2, the air mix door 4, the face / defroster door D, and the foot door 8 are controlled by a control device (not shown). The air mix door 4, the face / defroster door D, and the foot door 8 may be operated by a manual operation mechanism to which an operation force is applied by a manual operation of an occupant.

  The evaporator 3 evaporates the low-temperature and low-pressure refrigerant decompressed by the expansion valve in the refrigeration cycle by receiving air from the blower and cools the blown air passing around the tube through which the refrigerant flows. .

  The heater core 5 heats the air flowing around by using the high-temperature cooling water of the traveling engine as a heat source and heats the air flowing around it, and partially blocks the passage on the downstream side of the evaporator 3 in the air flow direction. Are arranged as follows.

  The air mix door 4 is a one-side pivot-type plate-like door provided downstream of the evaporator 3, and adjusts the ratio between the amount of air passing through the heater core 5 and the amount of air bypassing the heater core 5. When the air mix door 4 is at the solid line position in FIG. 1, the air flow to the heater core 5 is blocked, and when it is at the two-dot chain line position, all the air flows to the heater core 5 to be heated. .

  The air mix chamber is a space where the air flowing from the evaporator 3 and the air heated by the heater core 5 are mixed. The conditioned air whose temperature is adjusted in this space is supplied to the vehicle interior at an appropriate air volume ratio by controlling each mode door such as the face / defroster door D and the foot door 8.

  The foot door 8 is a rotary butterfly door having a rotating shaft and a flat door main body extending on both sides of the rotating shaft. When the foot door 8 is located at the solid line position in FIG. 1, the passage leading to the front foot opening 7 and the rear foot opening 6 is blocked, and when the foot door 8 is located at the two-dot chain line position in FIG. 1, the passage is completely opened. It is configured.

  The defroster opening 28 and the face opening 27 constitute an air passage in which the face / defroster door D is closed. Both of the openings are arranged in the front-rear direction of the vehicle and both face the air mix chamber. The inner wall surface of the air conditioning unit case 1 is curved in an arc shape around the defroster opening 28 and the face opening 27 so as to be positioned downward from the vehicle front side toward the vehicle rear side.

  The face / defroster door D has a plate shape as a whole, and is a sliding door that is slid and moved by a driving means while facing the defroster opening 28 and the face opening 27. As shown in the solid line position in FIG. 1, the face / defroster door D has one end in the moving direction of the door body 9 positioned on the vehicle front side of the defroster opening 28 to fully close the defroster opening 28. As shown by the broken line in FIG. 1, the other end in the moving direction is located behind the face opening 27 so that the defroster opening 28 is fully opened and the face opening 27 is fully closed. It has a movable range that moves to the position where it moves.

  Since the face / defroster door D can move within this movable range, for example, the defroster opening 28 or the face opening 27 can be adjusted to be fully closed, fully open, and half open depending on the operation mode.

  As shown in FIG. 2, the face / defroster door D includes a plate-like door body 9 and a rack 14 (door slide gear) that constitutes a driving means, and these are formed by integral molding of resin. Is preferred.

  In this example, the door body 9 has a shape in which a rectangular thin plate is curved in a cross-sectional arc shape. More specifically, the door main body 9 is curved so that the center side in the moving direction is closer to the openings 27 and 28 than both ends in the moving direction.

  The peripheral edge portion of the door body 9 constitutes a sealing surface that presses against the inner wall surface of the air conditioning unit case 1 when the openings 27 and 28 are closed.

In this example, the material of the door body 9 is polypropylene having a Young's modulus of 1680 MPa, and the plate thickness of the door body 9 is 0.7 mm. As a result, the bending rigidity value per 10 mm width of the door body 9 is 480 μNm ² .

  The rack 14 is provided on a plate surface facing the opposite side of the openings 27 and 28 in the door body 9, and both end portions of the door body 9 in the door width direction, that is, the direction orthogonal to the moving direction of the door body 9. The door body 9 is formed so as to extend in the entire moving direction.

  The rack 14 together with the pinion 13 (shaft gear) constitutes a delivery mechanism that drives the door body 9 to be delivered. The pinions 13 are provided at both ends of the shaft 10.

  The pinion 13 further rotates together with the gear by a rotational driving force of a servo motor or the like transmitted to a gear (not shown) provided outward in the axial direction, and this rotational driving force causes the rack 14 to be orthogonal to the axial direction of the shaft 10. This is transmitted as a force for moving in the direction, and the door body 9 moves.

  The pressing portion 30 is constituted by a wall portion extending from the inner wall surface of the air conditioning unit case 1 near the front foot opening 7 to the face / defroster door D side, and the pressing portion 30 includes the axial direction of the shaft 10 and the door body 9. It extends along the surface.

  A gap is formed between the pressing portion 30 and the inner wall surface of the air conditioning unit case 1 on the face opening 27 side. This gap constitutes a space for accommodating the front end when the face / defroster door D closes the face opening 27. In addition, you may comprise the press part 30 by the plate-shaped rib extended from the inner wall surface of the air-conditioning unit case 1 to the door side.

  In the air conditioning unit case 1, a guide groove 12 for guiding the face / defroster door D over the above-described movable range is provided. The guide groove 12 is formed in an arc shape along the inner wall surface of the air conditioning unit case 1.

  The guide groove 12 can be configured integrally with the air conditioning unit case 1 or as a separate part. When the guide groove 12 is configured integrally with the air conditioning unit case 1, it can be formed on the inner wall of the air conditioning unit case 1 by integral molding.

  Both ends of the face defroster door D in the width direction of the door, that is, both ends of the door body 9 in the width direction of the door and the rack 14 are guided by the guide grooves 12 so that the face defroster door D is inside the air conditioning unit case 1. It will slide along the wall.

  In the above configuration, the operation of the face defroster door D will be briefly described. For example, when the control device performs control such as changing the blowing mode, the control for driving the face defroster door D is started. At this time, a rotational driving force from the outside by a servo motor or the like acts on the gear and is transmitted to the shaft 10.

  When the shaft 10 is rotated by this rotational driving force and the pinion 13 is rotated, the face / defroster door D is slid to be sent out along the guide groove 12 by the engagement of the pinion 13 and the rack 14.

  When the face / defroster door D moves to a position where the defroster opening 28 or the face opening 27 is closed, the door body 9 is pressed against the inner wall surface of the air conditioning unit case 1, and the defroster opening 28 or the face opening 27 is moved. Blocked.

In the present embodiment, by setting the bending rigidity value per 10 mm width of the door body 9 to 480 μNm ² , both suppression of self-excited vibration of the door body 9 and securing of sealing properties are achieved.

  Here, when the bending rigidity value of the door body 9 is too large, it becomes difficult to press the door body 9 against the inner wall surface of the air conditioning unit case 1 when the openings 27 and 28 are closed. A gap is easily generated between the inner wall surface and the amount of wind leakage increases. In other words, it becomes difficult to ensure sealing performance.

  On the other hand, FIG. 3 shows a state in which the face / defroster door D is operated to an intermediate opening position between the defroster opening 28 and the face opening 27. In this state, as shown by the arrows in FIG. 3, the wind flow strikes in the direction substantially orthogonal to both ends of the door body 9 in the moving direction (portions surrounded by the one-dot chain line in FIG. 3).

  For this reason, when the bending rigidity value of the door body 9 is too small, both end portions in the moving direction of the door body 9 try to swell toward the leeward side due to the wind pressure, and at the same time, a force for returning to the original shape is generated. Depending on these balances, self-excited vibration is generated in the door body 9.

FIG. 4 is a graph showing the relationship between the bending rigidity value of the door body 9, the sealing performance, and the self-excited vibration of the door body 9. The horizontal axis in FIG. 4 is the bending rigidity value (μNm ² ) per 10 mm width of the door body 9, and the vertical axis in FIG. 4 is the sealability expressed by the amount of wind leakage (m ³ / s).

As can be seen from FIG. 4, when the bending rigidity value per 10 mm width is 3800 μNm ² or less, the amount of wind leakage is suppressed to 0.00175 m ³ / s or less, and the sealing property is kept good. Further, when the bending rigidity value per 10 mm width is 25 μNm ² or more, self-excited vibration does not occur.

Therefore, if the bending rigidity value per 10 mm width is set to 25 to 3800 μNm ² , the occurrence of self-excited vibration can be suppressed and the sealing property can be kept good.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  For example, the sliding door according to the present invention is not limited to use for the face / defroster door D described in the above embodiment. Needless to say, the foot door 8 and the air mix door 4 are not limited to the inside and outside. You may use for all the doors of the use which obstruct | occludes the air passage of a vehicle air conditioner, such as the door for air suction switching, the door for internal air suction, and the door for external air suction.

  In the above-described embodiment, the example in which the present invention is applied to the vehicle air conditioner has been described in each of the above embodiments. However, the present invention is not limited to this example. Of course, the present invention can be applied to other air conditioners.

It is sectional drawing of the air conditioning unit of the vehicle air conditioner in one Embodiment of this invention. It is a perspective view of the door main body of FIG. It is a principal part enlarged view of FIG. 1, and shows the state which operated the door to the intermediate opening position of the opening part. It is a graph which shows the relationship between the bending rigidity value of a door main body, sealing performance, and self-excited vibration.

Explanation of symbols

1 Air conditioning unit case (case)
9 Door body 14 Rack (Feeding mechanism)
27 Face opening (air passage)
28 Defroster opening (air passage)

Claims (4)

A case (1) forming an air passage (27, 28) therein;
A plate-like door body (9) that moves by a sliding method to open and close the air passages (27, 28);
A delivery mechanism (13, 14) for driving the door body (9) to be delivered;
When the door body (9) is operated to the intermediate opening position of the air passage (27, 28), the moving direction end of the door body (9) overlaps with the air passage (27, 28). And
The air conditioner characterized in that the bending rigidity value per 10 mm width of the door body (9) is 25 μNm ² or more. A case (1) forming an air passage (27, 28) therein;
A plate-like door body (9) that moves by a sliding method to open and close the air passages (27, 28);
A delivery mechanism (13, 14) for driving the door body (9) to be delivered;
When the door body (9) is operated to the intermediate opening position of the air passage (27, 28), the moving direction end of the door body (9) overlaps with the air passage (27, 28). And
An air conditioner characterized in that a bending rigidity value per 10 mm width of the door body (9) is 3800 μNm ² or less. A case (1) forming an air passage (27, 28) therein;
A plate-like door body (9) that moves by a sliding method to open and close the air passages (27, 28);
A delivery mechanism (13, 14) for driving the door body (9) to be delivered;
When the door body (9) is operated to the intermediate opening position of the air passage (27, 28), the moving direction end of the door body (9) overlaps with the air passage (27, 28). And
An air conditioner characterized in that a bending rigidity value per 10 mm width of the door body (9) is 25 to 3800 μNm ² .   When the door main body (9) is operated to an intermediate opening position of the air passage (27, 28), the air flow hits the direction substantially perpendicular to the moving direction end of the door main body (9). The air conditioner according to any one of claims 1 to 3, wherein the air conditioner is configured as follows.

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