JP2004189110A - Door support structure of air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of the troublesome assembling of an air condition door to a side wall and the high concentricity of through holes of a pair of side walls of an air condition case, and the severe dimension management of an engaging part of a link in a door support structure of an air condition device. <P>SOLUTION: The door support structure of the air condition device is arranged in a cylindrical air condition case 10 which has a pair of side walls 61, 63 and forms an air flow passage 11, and comprises an air condition door 30 configured to integrally form a rotation shaft 32 and a flat shaped door 36, and a link 40 which includes a first engagement part 49 to be engaged with a first part 62a the side wall, a shaft 42 passing through the side wall and inserted into the rotation shaft, and a second engagement part 45 passing through the side wall and engaged with into a part 34 of the air condition door. The air condition door is turned around a rotating shaft by the link during air conditioning. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in a door support mechanism of an air conditioner.
[0002]
[Prior art]
2. Description of the Related Art An air conditioning (air conditioning) device is used for heating and cooling air, and one type of air conditioning device is a vehicle air conditioning device. Generally, an air conditioner for a vehicle includes an evaporator and a heater core (see Patent Document 1). The evaporator absorbs latent heat of evaporation of a refrigerant in a refrigeration cycle to cool air, and the heater core is disposed downstream of the evaporator to cool the evaporator. The passed cold air is reheated. An air mixing door is rotatably mounted on the upstream side of the heater core by a door support mechanism.
[0003]
FIG. 5 shows a door support mechanism of a conventional air conditioner (see Patent Document 1). In the air mix door 70, a rotating shaft 71 and a door 76 are integrally formed, an engaging hole 73 is formed at the base of a cylindrical portion 72 formed at the right end of the rotating shaft 71, and a thin end is formed at the tip. A diameter portion 74 is formed. The small diameter portion 74 is inserted into the through hole 82 of the right side wall 81 of the air conditioning case 80. The link 85 includes a shaft support portion 86 and a locking portion 87 protruding in the axial direction above the shaft support portion 86. The shaft support portion 86 is fitted in the cylindrical portion 72, and the locking portion 87 is locked in the locking hole 73.
[0004]
A flange 77 and a protrusion 78 are formed at the left end of the rotating shaft 71, and the protrusion 78 passes through the through hole 84 of the left side wall 83, and the flange 77 contacts the left side wall 83.
[0005]
At the time of air conditioning, an external force is applied to the arm 88 of the link 85 to rotate the air mix door 70 around the rotation shaft 71, so that the position where air is heated by the heater core during heating is not heated during cooling. Occupy position.
[0006]
[Patent Document 1]
JP-A-11-151930
[Problems to be solved by the invention]
However, the conventional door support mechanism has room for improvement in the following points. The first problem is caused by the fact that the small-diameter portion 74 of the cylindrical portion 72 of the rotating shaft 71 is inserted into the through hole 82 of the right side wall 81. By employing this structure, not only is it difficult to assemble the small-diameter portion 74 into the through hole 82, but also the height between the through hole 82 in the right side wall 81 and the through hole 84 in the left side wall 83 is high. Coaxiality is required. As a result, assembling the air mix door 70 to the air conditioning case 80 takes time and effort.
[0008]
The second problem arises because the rear surface (right surface) of the locking portion 87 of the link 85 and the end surface (left surface) of the arm 88 hold the cylindrical portion 72 and the right wall 81. By employing this structure, the length L of the locking portion 87 must be determined in consideration of the tolerance T between the thickness T of the right side wall 81 and the length M of the cylindrical portion 72, and strict dimensional control is required. It causes cost increase.
[0009]
The present invention has been made in consideration of the above circumstances, is easy to assemble to the side wall of the air conditioning door, low coaxiality between the pair of side wall through holes of the air conditioning case, the link of the locking portion. It is an object of the present invention to provide a door support mechanism of an air conditioner that can loosen dimension control.
[0010]
[Means for Solving the Problems]
The inventor of the present application rotatably supports a rotating shaft portion of an air-conditioning door such as an air-mix door without fitting the rotating shaft portion and the side wall with a side wall of an air-conditioning case or holding a link shaft portion and a side wall with a locking portion of a link. With this in mind, the present invention has been completed.
[0011]
The door support mechanism of the air conditioner according to the present invention is disposed in a box-shaped air-conditioning case having a pair of side walls and forming an air flow passage, and includes a rotating shaft portion and a flat door portion. An air-conditioning door integrally formed with; a first locking portion disposed outside one of the side walls and locked to a first locked portion of the one side wall; And a link including a second locking portion that penetrates one side wall and is locked to the second locked portion of the air conditioning door. Then, at the time of air conditioning, the air-conditioning door is rotated around the rotating shaft by the link.
[0012]
In this door support mechanism, rotational power is transmitted from the shaft support of the link to the rotation shaft of the air mix door, and the link and the air-conditioning case are connected by the first locking portion and the first locked portion. The air mix door and the link are connected by the stop portion and the second locked portion.
[0013]
According to a second aspect of the present invention, in the first aspect, the rotary shaft of the air-conditioning door does not have a portion that fits into one side wall. According to a third aspect of the invention, in the door support mechanism according to the first aspect, the second locked portion is formed on a rotation shaft portion of the air conditioning door. According to a fourth aspect of the present invention, in the third aspect, at the time of air conditioning, the air-conditioning door changes the amount of air flowing through the air flow passage. According to a fifth aspect of the present invention, in the third aspect, the air-conditioning door is disposed near the air conditioner, and changes the ratio of the amount of air passing through the air conditioner to the amount of air not passing during air conditioning.
[0014]
According to a sixth aspect of the present invention, in the door support mechanism according to the first aspect, the first locking portion and the second locking portion of the link are formed around the pivot portion. In the door support mechanism according to a seventh aspect, in the first aspect, the second locking portion of the link is formed integrally with the shaft support portion. In the door support mechanism according to the eighth aspect, in the sixth or seventh aspect, the first locking portion is shorter than the second locking portion.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
<Air conditioner>
The use of the air conditioner is not particularly limited, and the air conditioner can be applied to an air conditioner for a vehicle, a home appliance, and the like. When applied to a vehicle, a door is turned at the entrance of the air conditioner to change the ratio of outside air to inside air, and an air mix door is turned at the middle to change the ratio of cold air to hot air. , And a door that is turned to open and close the foot outlet at the outlet. The air-conditioning case forming the air flow passage has at least a pair of side walls that pivotally support the air-conditioning door, and a first locked portion is formed on one of the side walls.
<Air-conditioning door>
In the air-conditioning door, the rotating shaft portion and the door portion are integrally formed, and the size and shape are determined by the size and shape of the air flow passage of the air-conditioning case. The rotating shaft portion has a cylindrical portion at one end, and a second locked portion is formed in the cylindrical portion. However, this cylindrical portion is not inserted into the air conditioning case.
<Link>
The link pivotally supports one side edge of the air mixing door to one side wall, is disposed outside the one side wall, penetrates the one double wall, and is inserted into the cylindrical portion, It has a second locking portion that penetrates the side wall and is locked to the rotating shaft portion, and a first locking portion that is locked to one side wall. One or two first locking portions have a claw portion at a tip and are elastically deformable in a radial direction. One or two of the second locking portions have a claw at the tip and are elastically deformable in the radial direction, and are longer than the first locking portions.
[0016]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1, 2 and 3. FIG.
<Example>
(Constitution)
As shown in FIG. 3, the vehicle air conditioner includes an air conditioning case 10, an evaporator 24, and a heater core 26. The air-conditioning case 10 has a box shape as a whole, and a hollow portion thereof serves as an air flow passage 11. An air intake 12 is provided at one end, and a defroster outlet 14, a face outlet 15, and a foot outlet 16 are provided at the other end. The evaporator 24 and the heater core 26 are arranged at an intermediate portion having a pair of side walls 61 and 63 (see FIG. 1).
[0017]
The evaporator 24 absorbs the latent heat of evaporation of the refrigerant in the refrigeration cycle and cools the air flowing around the evaporator 24, and is arranged so as to cross the air flow passage 11. The heater core 26 reheats the cold air that has passed through the evaporator 24 by using the heat of engine cooling water (warm water). A bypass passage 27 is formed above the heater core 26 so as to protrude from the lower half of the air flow passage 11 downstream of the evaporator 24. An air mix door 30 is arranged upstream of the heater core 26.
[0018]
As shown in FIG. 1 and FIG. 2, the air mixing door 30 has a rotating shaft portion 31 and a rectangular plate-shaped door portion 36 integrally formed. An annular collar portion 33 is formed at the tip of a cylindrical portion 32 having a predetermined inner diameter and depth and formed at the right end portion of the rotating shaft portion 31, and has a rectangular shape that penetrates behind (just to the left) in the radial direction. One locking hole (second locked portion) 34 is formed. A collar portion 33 projects laterally from the door portion 36. A projection 38 is formed at the left end of the rotating shaft.
[0019]
The link 40 is disposed outside (right side) of the right side wall 61, and has a base 41, a shaft support 42 extending in the axial direction from the base 41, a second locking portion 45 and a first locking portion 49, and a radius from the base 41. And a driving unit 53 extending in the direction. The shaft support portion 42 has a circular cross section, an outer diameter slightly smaller than the inner diameter of the cylindrical portion 32 of the rotating shaft portion 31, and a detent 43 formed at the tip.
[0020]
One second locking portion 45 is located above the pivot 42, and two first locking portions 49 (only one shown) are located slightly below the axis of the pivot 42, each at a vertex of a triangle. It is formed so that. The second locking portion 45 has a thick portion 46, a thin portion 47 and a claw portion 48. The thin portion 47 is elastically deformable in the radial direction, and the claw portion 48 extends outward in the radial direction. The first locking portion 49 is elastically deformable in the radial direction because of the gap 51 formed between the first locking portion 49 and the shaft support portion 42. The claw portion 50 extends radially outward.
[0021]
A circular through hole 62 having an inner diameter substantially equal to the outer diameter determined by one second locking portion 45 and two second locking portions 49 of the link is formed in the right side wall 61 of the air conditioning case 60, The inner peripheral edge 62a is a locking hole (first locked portion). The left side wall 63 is formed with a through hole 64 having a circular cross section.
(Effect)
When attaching the air mix door 30 to the air conditioning case 40, the protrusion 38 of the air mix door 30 is inserted into the through hole 64 of the left side wall 63 in FIG. In this state, the cylindrical portion 32 and the through hole 62 of the right side wall 61 are aligned, and the shaft supporting portion 42 of the link 40 is inserted from outside the right side wall 61. With this insertion, the first locking portion 45 and the second locking portion 49 are once elastically deformed inward in the radial direction, and then elastically deformed outward in the radial direction to be elastically deformed outward in the radial direction. Each is locked to the inner peripheral edge 62a.
[0022]
Thus, the air mixing door 30 is pivotally supported by the link 40 on the air-conditioning case 61 by inserting the pivot support 42 into the rotary shaft 32, and the rotary shaft 32 is not fitted into the right side wall 61. Therefore, the dimensional control of the rotating shaft 32 and the right side wall 61 can be relaxed. Further, the coaxiality between the through hole 62 of the right side wall 61 and the through hole 64 of the left side wall 63 can be reduced. Further, the first locking portion 45 of the link 40 is locked only to the rotating shaft portion 32 of the air mix door 30, and is not locked to the right side wall 61. Therefore, these dimensional controls can be loosened. Note that the two first locking portions 49 of the link 40 are locked to the right side wall 61, and the connection between the two is sufficient.
[0023]
In FIG. 3, at the time of heating, an external force is applied to the arm 52 of the link 40 to rotate the air mix door 30 clockwise to close the bypass passage 27. Then, all the cool air sent from the evaporator 24 passes through the heater core 26 and is heated, and the temperature of the air rises. The hot air blows out from the foot outlet 16 into the vehicle interior. On the other hand, when fogging is stopped, the air mix door 30 is rotated counterclockwise to open the bypass path 27. Then, a part of the air passes through the heater core 26 and is heated, and the remaining air is not heated by the heater core 26, so that the temperature of the air decreases and hot air blows out from the defroster outlet 14.
[0024]
Incidentally, a mode is also conceivable in which the shaft portion of the link is fitted into the cylindrical portion of the rotating shaft portion of the air mixing door, the plurality of locking portions are locked to the air conditioning case, but not to the rotating shaft portion. However, in this case, since the link and the mix door are not locked, the air mix door easily moves in the axial direction with respect to the link. In order to prevent this movement, the fitting between the cylindrical portion of the rotating shaft and the shaft must be tight, and strict dimensional control is required. The above embodiment does not have such a problem.
<Modification>
FIG. 4 shows a modification of the above embodiment. This modification is different from the first embodiment in that three (only two are shown) first locking portions 49 are formed around the shaft supporting portion 42, and the second locking portion 67 extends long from the upper end of the shaft supporting portion 42. This embodiment is different from the above embodiment in that it is locked in a locking hole 65 formed at the base of the cylindrical portion 32.
[0025]
According to this modification, an effect is obtained in which the connection between the link 40 and the air-conditioning case 10 and the connection between the link 40 and the air mix door 30 are more reliable.
[0026]
【The invention's effect】
As described above, according to the door support mechanism of the air conditioner of the present invention, the driving force is transmitted from the shaft support of the link to the rotation shaft of the air mix door, and the first locking portion of the link is connected to the air-conditioning case. Only the link is connected to the air conditioning case by locking to the first locked portion, and the second locking portion of the link is locked to the second locked portion of the air mixing door to link the link to the air mixing door. Only joins. Therefore, the air mix door can be pivotally supported on the air conditioning case by the link without inserting the rotating shaft of the air mixing door into the air conditioning case. As a result, the air conditioning door can be easily attached to the side wall, the coaxiality between the pair of side walls of the air conditioning case can be reduced, and the dimensional control of the first locking portion of the link can be eased.
[0027]
According to the door support mechanism of the second aspect, the dimensional control of the first locking portion of the link is relaxed. According to the door support mechanism of the third aspect, the air mix door and the link can be connected without hindering the rotation of the air mix door. According to the door support mechanism of the fourth aspect, it is possible to adjust the ratio between the outside air and the inside air to adjust the cooling effect and the heating effect of the vehicle room and the like.
[0028]
According to the door support mechanism of the fifth aspect, the ratio of the amount of air passing through the air conditioner to the amount of air not passing can be changed, and the temperature of the air can be adjusted.
[0029]
According to the door support mechanism of the sixth and seventh aspects, the structure of the link having the first locking portion and the second locking portion is compact. According to the door support mechanism of the eighth aspect, the link, the air-conditioning case, and the air mix door are securely locked.
[Brief description of the drawings]
FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.
FIG. 2 is an explanatory view showing an assembled state of the embodiment.
FIG. 3 is an explanatory view showing the whole of the embodiment.
FIG. 4 is a sectional view of a main part showing a second embodiment of the present invention.
FIG. 5 is a sectional view of a main part showing a conventional example.
[Explanation of symbols]
10: Air-conditioning case 11: Air flow passage 26: Heater core 30: Air mix door 31: Rotating shaft part 32: Cylindrical part 34: Second locked part 36: Door part 40: Link 45: Second locking part 49: First locking portion 61: Side wall 62: Through hole 62a: First locked portion

Claims (8)

An air-conditioning door that is disposed in a box-shaped air-conditioning case that has a pair of side walls and forms an air flow passage, and a rotating shaft portion and a flat door portion are integrally formed;
A first locking portion disposed outside the one side wall and locked to a first locked portion of the one side wall, a shaft supporting portion penetrating through the one side wall and fitted into the rotating shaft portion; A link including a second locking portion that penetrates the one side wall and is locked to the second locked portion of the air conditioning door;
A door support mechanism for an air conditioner, wherein the air-conditioning door is rotated around the rotary shaft by the link during air-conditioning. The door support mechanism according to claim 1, wherein the rotation shaft of the air-conditioning door does not have a portion that fits into the one side wall. The door support mechanism according to claim 2, wherein a second locked portion of the air-conditioning door is formed on the rotation shaft portion. The door support mechanism according to claim 3, wherein the air-conditioning door changes an amount of air flowing through the air flow passage during air conditioning. 4. The door support mechanism according to claim 3, wherein the air-conditioning door is disposed near the air conditioner, and changes a ratio of an amount of air passing through the air conditioner and an amount of air not passing during the air conditioning. 5. The door support mechanism according to claim 1, wherein the first locking portion and the second locking portion of the link are formed around the pivot. The door support mechanism according to claim 1, wherein the two locking portions of the link are formed integrally with the pivot portion. The door support mechanism according to claim 6, wherein the first locking portion is shorter than the second locking portion.

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