JP2006182245A - Air passage opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent noise at the time of door minute opening, and to facilitate controlling of minute flow amount at the time of door small opening. <P>SOLUTION: At a part corresponding to an edge potion of an opening of a opening/closing door 7 end portion, seal lips 7c, 7d blocking a clearance generated between the opening/closing door 7 and the edge portion of the opening portion when the opening/closing door 7 closes the opening portion and an auxiliary lip 7f which does not abut on the edge portion of the opening portion even when the opening/closing door 7 closes the opening portion are provided. On the auxiliary lip 7f, a plurality of projecting portions 7h is formed by a plurality of notch portions 7g. Therefore, the auxiliary lip 7f for preventing noise is provided in addition to the seal lips 7c, 7d related to opening/closing of the opening portion, so that controlling of small flow amount at the time of door minute opening can be easily carried out by the seal lips 7c, 7d which are not equipped with the notch portions 7g while noise at the time of door small opening is prevented by the auxiliary lip 7f. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air passage opening and closing device that opens and closes an air passage and a vehicle air conditioner using the same.

  The conventional air passage opening / closing device has a problem that, at the time of a minute opening of the door, the wind speed increases due to a small gap between the edge of the door and the edge of the opening (mating seal wall surface), and abnormal noise (wind noise) is generated. was there.

This abnormal noise is caused by a vortex line generated when air passes through a small gap. Conventionally, by forming a plurality of convex portions by forming notches on the tip side of the seal lip. The flow of air that has passed through the gap between the seal lip and the edge of the opening is disturbed to suppress the generation of vortex streets (see, for example, Patent Document 1).
Utility Model Registration No. 2570855

  However, if a notch and a protrusion are provided on the tip side of the seal lip as in the past, it is possible to prevent abnormal noise when the door is slightly open, but the seal lip is notch when the door is slightly open. There is a problem that it is difficult to control the minute flow rate because air flows through the part.

  In view of the above points, an object of the present invention is to facilitate control of a minute flow rate at the time of a minute door opening while preventing abnormal noise at the time of the minute door opening.

  In order to achieve the above object, according to the first aspect of the present invention, there are provided the opening (1a, 4) through which air flows, the casing (1) constituting the air passage, and the opening (1a, 4). In the air passage opening and closing device provided with the opening and closing door (7), the opening and closing door has a portion corresponding to the edge (1b and 4a) of the opening (1a and 4) in the end of the opening and closing door (7). A seal lip that closes a gap generated between the opening / closing door (7) and the edge (1b, 4a) of the opening (1a, 4) when the opening (1a, 4) is closed in (7). (7c, 7d) and the auxiliary lip (7f) that does not contact the edge (1b, 4a) of the opening (1a, 4) even when the opening (1a, 4) is closed by the open / close door (7) ) And a plurality of notches (7g) are provided at the tip of the auxiliary lip (7f). Are protrusions (7h) is formed, notches (7 g) and protrusions (7h) is characterized by being arranged alternately along the longitudinal direction of the auxiliary lip (7f).

  According to this, since the seal lip involved in opening and closing the opening and the auxiliary lip for preventing abnormal noise are provided independently, the auxiliary lip prevents the abnormal noise at the time of the minute opening of the door, and the notch The minute flow rate at the time of a minute opening degree of the door can be easily controlled by the seal lip not provided with the portion.

  According to a second aspect of the present invention, in the air passage opening and closing device according to the first aspect, the open / close door (7) is a quadrangular door that rotates about the shaft portion (7b), and the open / close door (7). The end farthest from the shaft (7b) is the tip end, and the end between the shaft (7b) and the tip end of the open / close door (7) is the side end. The auxiliary lip (7f) is provided only at the side surface end portion of the tip end portion and the side surface end portion.

  By the way, since there is always a small gap between the side edge and the casing regardless of the opening of the door, there is a possibility that abnormal noise will always occur at that part. Therefore, it is different to provide an auxiliary lip at the side edge. This is particularly effective for preventing sound.

  According to a third aspect of the present invention, in the air passage opening and closing device according to the first aspect, the open / close door (7) is a quadrangular door that rotates about the shaft portion (7b). 7) The end farthest from the shaft (7b) is the tip end, and the end between the shaft (7b) and the tip end is the end of the open / close door (7). When the side end portion is used, the auxiliary lip (7f) may be provided only at the tip end portion of the tip end portion and the side end portion.

  As in the invention according to claim 4, in the air passage opening and closing device according to claim 1, the opening and closing door (7) is a quadrangular door that rotates about the shaft portion (7b), and the opening and closing door ( 7) The end farthest from the shaft (7b) is the tip end, and the end between the shaft (7b) and the tip end is the end of the open / close door (7). When it is set as the side end, the auxiliary lip (7f) may be provided at the tip end and the side end.

  According to a fifth aspect of the present invention, there is provided an air passage opening and closing device according to any one of the first to fourth aspects, a cooling heat exchanger (2) disposed in the casing (1) and cooling air. A vehicle air conditioner that is disposed in the casing (1) on the downstream side of the cooling heat exchanger (2) and includes a heating heat exchanger (3) that heats the air. ), The air volume ratio between the warm air passing through the heating heat exchanger (3) and the cold air bypassing the heating heat exchanger (3) is adjusted.

  Thus, the air passage opening and closing device according to any one of claims 1 to 4 can be applied to a so-called air mix door that adjusts the air volume ratio between hot air and cold air in a vehicle air conditioner. .

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

  An embodiment of the present invention will be described. FIG. 1 is a view showing the structure of an indoor unit in a vehicle air conditioner equipped with an air passage opening and closing device according to an embodiment of the present invention, FIG. 2 is an enlarged perspective view of part A in FIG. 1, and FIG. FIG. 4 is a perspective view of the vicinity of the auxiliary lip.

  In FIG. 1, a casing 1 constitutes an air passage for guiding air from a blower (not shown) that generates an air flow into a vehicle interior.

  An evaporator 2 that cools the air blown into the room is accommodated in the casing 1, and the entire amount of air blown from the blower passes through the evaporator 2.

  In the casing 1, a heater core 3 that heats the air blown into the room is accommodated on the downstream side of the air flow of the evaporator 2, and the air that has passed through the evaporator 2 bypasses the heater core 3 and flows to the room side. A passage 4 is provided. The evaporator 2 corresponds to the cooling heat exchanger of the present invention, the heater core 3 corresponds to the heating heat exchanger of the present invention, and the bypass passage 4 corresponds to the opening of the present invention.

  The air mix door 7 adjusts the air volume ratio between the cool air passing through the bypass passage 4 and the warm air passing through the heater core 3, and the cool air passing through the bypass passage 4 and the warm air passing through the heater core 3 are transferred to the air mixing chamber 8. And mixed.

  Further, on the upper side of the air mixing chamber 8, a face opening 9 communicating with a face outlet (not shown) for blowing air upward in the passenger compartment via a duct (not shown), and a vehicle window glass A defroster opening 10 that communicates via a duct (not shown) with a defroster outlet (not shown) that blows out air (mainly on the windshield) is provided. On the other hand, on the lower side of the air mixing chamber 8, a foot opening (not shown) for blowing air to the lower side of the vehicle interior is provided.

  The face door 11 opens and closes the face opening 9, the defroster door 12 opens and closes the defroster opening 10, and the foot door 13 opens and closes the foot opening.

  The air mix door 7, face door 11, defroster door 12 and foot door 13 open and close their openings by swinging (rotating) a rectangular plate-like door body with an actuator such as a servo motor around the shaft. Is.

  Hereinafter, the air mix door 7 will be described in detail.

  2 to 4, an opening 1 a is an inlet connected to the evaporator 2 in the air passage formed by the casing 1, and the air flow upstream side of the opening 1 a and the bypass passage 4 (see FIG. 1). The air mix door 7 is disposed so as to be swingable.

  The air mix door 7 includes a substantially rectangular door main body 7a that opens and closes the opening 1a and the bypass passage 4, a shaft 7b that serves as a swinging shaft of the air mix door 7, and an end of the door main body 7a. Provided at a portion corresponding to the edge portion 1b and elastically deformable to close a gap generated between the air mix door 7 and the edge portion 1b of the opening portion 1a when the opening portion 1a is closed by the air mix door 7. The first seal lip 7c is provided at a portion corresponding to the edge 4a (see FIG. 1) of the bypass passage 4 among the ends of the door body 7a, and the air mix door 7 closes the air when the bypass passage 4 is closed. An elastically deformable second seal lip 7d for closing a gap generated between the mix door 7 and the edge 4a of the bypass passage 4, and an elasticity for closing a gap on the shaft 7b side of the edge 1b of the opening 1a. Deformable third And a Rurippu 7e like.

  As shown in FIGS. 3 and 4, the first seal lip 7c and the second seal lip 7d are formed in a V shape, and the door body 7a is interposed between the first seal lip 7c and the second seal lip 7d. An auxiliary lip 7f extending in a direction parallel to the lip is provided. Therefore, even when the first seal lip 7c closes the opening 1a or when the second seal lip 7d closes the bypass passage 4, the auxiliary lip 7f is connected to the edge 1b of the opening 1a and the bypass passage 4. It does not come into contact with any of the edge portions 4a.

  The first and second seal lips 7c, 7d are formed between the tip end portion farthest from the shaft portion 7b of the end portion of the door body 7a and the shaft portion 7b and the tip end portion of the end portion of the door body 7a. On the other hand, the auxiliary lip 7f is provided only at the front end of the end of the door body 7a.

  At the tip of the auxiliary lip 7f, a plurality of convex portions 7h are formed by a plurality of cutout portions 7g. In other words, the notches 7g and the protrusions 7h are alternately arranged along the longitudinal direction of the auxiliary lip 7f (in the present embodiment, the direction parallel to the shaft portion 7b).

  The tip of the convex portion 7h protrudes beyond the tips of the first and second seal lips 7c and 7d. The bottom of the notch 7g is located closer to the door body 7a than the tips of the first and second seal lips 7c, 7d.

  Here, the example of a dimension of each part of auxiliary lip 7f is explained. The protruding height h of the convex portion 7h is about 1 mm, and the length L1 of the convex portion 7h in the direction parallel to the shaft portion 7b is about 10 mm. The depth D of the cutout portion 7g is about 2 mm, and the length L2 of the cutout portion 7g in the direction parallel to the shaft portion 7b is about 3 mm.

  Incidentally, the door body 7a and the shaft portion 7b are made of hard resin such as polypropylene, and the lips 7c to 7f are made of soft resin such as elastomer or rubber, and the door body 7a, the shaft portion 7b and each lip 7c to 7f is integrated by integral molding.

  In the present embodiment, the opening 1a and the bypass passage 4 are opened and closed by the door body 7a and the first and second seal lips 7c and 7d. On the other hand, the auxiliary lip 7f disturbs the air flow that has passed through the gap between the first and second seal lips 7c, 7d and the edge portions 1b, 4a, thereby suppressing the generation of vortex streets and preventing the generation of abnormal noise. .

  Thus, since the auxiliary lip 7f for preventing abnormal noise is provided separately from the first and second seal lips 7c and 7d involved in opening and closing of the opening 1a and the bypass passage 4, the door is opened by the auxiliary lip 7f. The first and second seal lips 7c and 7d that are not provided with the notch 7g can be easily controlled with a minute flow rate at the minute door opening while preventing abnormal noise at the minute opening.

(Other embodiments)
In the above embodiment, the auxiliary lip 7f is provided only at the tip end of the end of the door body 7a. However, the auxiliary lip 7f may be provided only at the side end of the end of the door main body 7a. Or you may provide together in the front-end | tip end part and side surface edge part among the edge parts of the door main body 7a.

  Incidentally, since there is always a small gap between the side surface end of the door body 7a and the casing 1 regardless of the opening of the door, there is a possibility that abnormal noise will always occur at that portion, and therefore the auxiliary lip 7f is connected to the door body. Providing at the side edge of 7a is particularly effective for preventing abnormal noise.

It is a figure which shows the structure of the indoor unit in a vehicle air conditioner provided with the air passage opening / closing apparatus which concerns on one Embodiment of this invention. It is an expansion perspective view of the A section of FIG. It is sectional drawing which follows the BB line of FIG. It is a perspective view near an auxiliary lip.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Casing, 1a ... Opening part, 1b, 4a ... Edge part, 4 ... Bypass passage (opening part), 7 ... Opening / closing door, 7c, 7d ... Seal lip, 7f ... Auxiliary lip, 7g ... Notch part,
7h ... convex part.

Claims (5)

In an air passage opening and closing apparatus having an opening (1a, 4) through which air flows, a casing (1) constituting an air passage, and an opening / closing door (7) for opening and closing the opening (1a, 4). ,
In the part corresponding to the edge (1b, 4a) of the opening (1a, 4) among the ends of the opening / closing door (7), the opening (1a, 4) is formed by the opening / closing door (7). Seal lips (7c, 7d) for closing gaps generated between the open / close door (7) and the edges (1b, 4a) of the openings (1a, 4) when the door is closed, and the open / close door An auxiliary lip (7f) that does not contact the edge (1b, 4a) of the opening (1a, 4) even when the opening (1a, 4) is closed in (7) is provided,
At the tip of the auxiliary lip (7f), a plurality of protrusions (7h) are formed by a plurality of notches (7g),
The air passage opening and closing device characterized in that the notches (7g) and the protrusions (7h) are alternately arranged along the longitudinal direction of the auxiliary lip (7f). The open / close door (7) is a quadrangular door that rotates about the shaft portion (7b),
Of the end portions of the open / close door (7), the end portion farthest from the shaft portion (7b) is a tip end portion, and among the end portions of the open / close door (7), the shaft portion (7b) and the tip end portion. When the edge part between is the side edge part,
The air passage opening and closing device according to claim 1, wherein the auxiliary lip (7f) is provided only at the side surface end portion of the tip end portion and the side surface end portion. The open / close door (7) is a quadrangular door that rotates about the shaft portion (7b),
Of the end portions of the open / close door (7), the end portion farthest from the shaft portion (7b) is a tip end portion, and among the end portions of the open / close door (7), the shaft portion (7b) and the tip end portion. When the edge part between is the side edge part,
The air passage opening and closing device according to claim 1, wherein the auxiliary lip (7f) is provided only at the tip end portion of the tip end portion and the side surface end portion. The open / close door (7) is a quadrangular door that rotates about the shaft portion (7b),
Of the end portions of the open / close door (7), the end portion farthest from the shaft portion (7b) is a tip end portion, and among the end portions of the open / close door (7), the shaft portion (7b) and the tip end portion. When the edge part between is the side edge part,
The air passage opening and closing device according to claim 1, wherein the auxiliary lip (7f) is provided at the tip end portion and the side surface end portion. An air passage opening and closing device according to any one of claims 1 to 4,
A cooling heat exchanger (2) disposed in the casing (1) for cooling air;
A vehicle air conditioner provided with a heating heat exchanger (3) disposed in the casing (1) on the downstream side of the cooling heat exchanger (2) for heating air,
The opening / closing door (7) adjusts the air volume ratio between the warm air passing through the heating heat exchanger (3) and the cold air bypassing the heating heat exchanger (3). Air conditioner.

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