JP2008195377A - Air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent self-excitation vibration of a door without losing an effect due to aging deterioration. <P>SOLUTION: This air-conditioner has a case 10 forming an air passage, and a door (rotating element) 19 rotatably supported by the case 10. A closed space gg is formed in a surface, on which the case 10 is opposed to the door 19, and the closed space gg is filled with a high-viscosity fluid KR. According to this, when the door 19 rotates, slide resistance is generated by the high-viscosity fluid KR filled in the closed space gg formed in the surface, on which the case 10 is opposed to the door 19. The higher a rotation speed of the door 19 is, the larger the slide resistance becomes. Therefore, the effective slide resistance corresponding to a quick movement of the door 19 can be generated, and the self-excitation vibration can be restrained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air conditioner in which a substantially flat door rotates to open and close an opening, and in particular, due to a pulsation of a pressure difference between a space on the windward side and a space on the leeward side of the door. The present invention relates to an air conditioner that can prevent self-excited vibration of a door that occurs.

  Conventionally, as an example of a door device used for a vehicle air conditioner or the like, for example, as shown in FIG. 1, a substantially flat air mix door 19 rotatably supported by a case 10 is connected to an air flow of a heater core 21. What was provided in the upstream is known. The air mix door 19 is positioned to close the opening of the cool air passage 22 during maximum heating, and is positioned to close the ventilation surface of the heater core 21 as the opening of the hot air passage during maximum cooling. By rotating in this way, the ratio of the amount of air heated through the heater core 21 out of the air cooled through the evaporator 18 is adjusted.

  And in the door apparatus of such a structure, it is known that the air mix door 19 will generate a self-excited vibration depending on the balance of the force added to the air mix door 19 at the time of ventilation. For example, in the air conditioner having the layout as shown in FIG. 1, the windward side where the opening of the cool air passage 22 is slightly opened, that is, the air mix door 19 has a ventilation resistance by a minute angle than the position at the time of maximum heating. In the position rotated to the right, the air that has passed through the evaporator 18 flows into the cool air passage 22 with less ventilation resistance, and the wind speed of the air passing through the small gap between the seal surface and the air mix door 19 increases. To do.

  As a result, the air passing through a small gap between the sealing surface and the air mix door 19 reduces the pressure on the leeward side of the air mix door 19, and the air mix door 19 sucks in the direction to close the opening of the cool air passage 22. Is done. However, when the air mix door 19 closes the opening of the cold air passage 22, the force for sucking the air mix door 19 toward the opening of the cold air passage 22 is lost, and the air mix door 19 returns to its original position.

  By repeating such an operation within a very short time, the pressure difference between the space on the windward side and the space on the leeward side of the air mix door 19 pulsates. Further, the pulsation of the wind speed is applied, so that the air mix door 19 becomes unstable and self-excited vibration is generated. And when such a self-excited vibration generate | occur | produces, there exists a problem that abnormal noise will generate | occur | produce at the time of the action | operation of an air conditioner.

As a conventional technique for solving such a problem, a door device having a structure as shown in Patent Document 1 below is known. This door device includes a rotary shaft that is rotatably supported by a case and an air mix door, and a packing made of urethane is provided at the top end portion of the air mix door. On the other hand, a rib protrudes from the upper wall of the case so as to fit into the packing. As long as the angle formed by the seal surface of the case and the plate surface of the door is small, self-excited vibration is likely to occur.The ribs are fitted in the packing and the air mix door is held, so Occurrence is prevented. As a result, generation of abnormal noise due to self-excited vibration is prevented.
Japanese Patent Laid-Open No. 9-76726

  By the way, in an air conditioner for a vehicle or the like, it is required to reduce the size of the air conditioner in order to expand the living space, and on the other hand, to increase the air volume in order to achieve high performance. As these are advanced, the inside of the air conditioner tends to gradually lose high pressure. This high pressure loss increases the pressure applied to each door in the air conditioning case, making the doors more susceptible to self-excited vibration. Abnormal noise tends to occur.

  As a method for solving these problems, as in Patent Document 1 described above, a urethane packing is provided on the door, and the packing and the rib of the case are rubbed, or the packing is compressed to slide the door. There is a way to put resistance. However, the method using such a packing has a problem that the effect is lost due to deterioration over time. There is also a problem that rubbing noise is generated at low temperatures. Furthermore, there is a problem that the sealing performance of the door is increased.

  The present invention has been made paying attention to such problems existing in the prior art, and one object thereof is a means capable of preventing self-excited vibration of the door without aging and losing its effect. It is providing the air conditioner provided with.

  Another object of the present invention is to provide an air conditioner including means capable of preventing self-excited vibration of a door without generating a rubbing sound at a low temperature.

  Still another object is to provide an air conditioner provided with means capable of preventing door self-excited vibration without increasing the sealing performance of the door.

  In order to achieve the above object, the present invention employs the following technical means. That is, in the first aspect of the present invention, in the air conditioner having the case (10) forming the air passage and the rotating body (19, 32, 34) rotatably supported by the case (10), A closed space (gg) is formed between the facing surfaces of the case (10) and the rotating body (19, 32, 34), and the closed space (gg) is filled with a high-viscosity fluid (KR). It is characterized by that.

  According to the first aspect of the present invention, when the rotating body (19, 32, 34) such as a door rotates, the case (10) and the rotating body (19, 32, 34) face each other. Sliding resistance is generated by the high-viscosity fluid (KR) filled in the closed space (gg) formed between the two surfaces. Since this sliding resistance has a characteristic that the sliding resistance increases as the rotating speed of the rotating body (19, 32, 34) increases, the fast movement of the rotating body (19, 32, 34) called self-excited vibration. Therefore, effective sliding resistance corresponding to the above can be generated and suppressed.

  Then, the sliding body (19, 32, 34) does not cause problems such as generation of a rubbing sound at low temperatures and an increase in sealing performance of the rotating body (19, 32, 34) due to the sliding resistance having such characteristics. 32, 34) can be prevented from self-excited vibration and abnormal noise. Further, since the high-viscosity fluid (KR) can be enclosed in the closed space (gg) so as not to flow out, sliding resistance can be generated more effectively, and the time of the enclosed high-viscosity fluid (KR) can be increased. Deterioration can be prevented and the effect can be maintained over a long period of time.

  Moreover, in invention of Claim 2, in the air conditioner of Claim 1, a fixed side protrusion (104) is provided around the support hole (101) of the case (10), and the fixed side protrusion A closed space (gg) is formed between the inner peripheral surface of (104) and the outer surface of the rotating shaft (191) of the rotating body (19).

  Moreover, in invention of Claim 3, in the air conditioner of Claim 1, an enlarged diameter part (193,322) is provided around the rotating shaft (191,325) of a rotating body (19,32). The closed space (gg) is formed between the case side plane of the enlarged diameter portion (193, 322) and the wall surface of the case (10).

  Moreover, in invention of Claim 4, in the air conditioner of Claim 1, the rotating shaft (191, 325, 341) or rotating shaft hole (196, 321) of the rotating body (19, 32, 34). 345) and a rotation-side protrusion (194, 323, 342) provided along the circumferential direction of the diameter-enlarged portion (193, 322, 342). 343) and a fixed-side protrusion (104) provided around the support hole (101) of the case (10), and an inner peripheral surface or an outer periphery of the rotation-side protrusion (194, 323, 343). A closed space (gg) is formed between the surface and the inner peripheral surface or outer peripheral surface of the fixed-side protrusion (104).

  According to a fifth aspect of the present invention, in the air conditioner according to the fourth aspect, the outer peripheral surface of the support hole (101) or the support shaft (105) is used as the outer peripheral surface of the fixed-side protrusion. It is said.

  Moreover, in invention of Claim 6, in the air conditioner of Claim 1, the rotating shaft (191, 325, 341) or the rotating shaft hole (196, 321) of the rotating body (19, 32, 34). 345) and an enlarged-diameter portion (193, 322, 342) provided around the rotation-side groove portion (195, 324, 346) provided along the circumferential direction in the enlarged-diameter portion (193, 322, 342) or Around the rotation-side protrusion (194, 323, 343) and the support hole (101) or support shaft (105) of the case (10), the rotation-side groove (195, 324) or rotation-side protrusion ( 194, 323, 343) and fixed side protrusions (104) or fixed side grooves (103) are provided, and rotation side grooves (195, 324, 346) or rotation side protrusions (194, 323, 343) and the fixed-side protrusion ( It is characterized in that the closed space (gg) is formed between the inner peripheral surface or outer peripheral surface 04) or the fixed-side groove portion (103).

  According to the inventions according to the second to sixth aspects, in any structure, a high-viscosity fluid (between the facing surface between the case (10) and the rotating body (19, 32, 34)) ( A closed space (gg) filled with KR) can be formed, and the effect of the sliding resistance described in claim 1 can be obtained.

  According to a seventh aspect of the present invention, in the air conditioner according to the sixth aspect of the present invention, the rotation-side protrusions (194, 323, 343) in the rotation axis direction of the rotation body (19, 32, 34) or the fixed portion. A closed space (gg) is also continuously formed between the tip of the side protrusion (104) and the groove bottom of the rotating side groove (195, 324, 346) or fixed side groove (103). It is characterized by. According to the seventh aspect of the present invention, it is possible to prevent the generation of abnormal noise even when the rotating shaft moves in the thrust direction.

  According to an eighth aspect of the present invention, in the air conditioner according to the sixth or seventh aspect, the rotating body (19) is provided with a rotating side protrusion (194, 323) and a rotating side groove (195, 324). And a fixed groove (103) and a fixed protrusion (104) are formed in the case (10). According to the eighth aspect of the present invention, a plurality of engaging grooves and protrusions may be configured to increase the sliding resistance during rotation. Further, if the sliding resistance is made equivalent, the height of the unevenness may be lowered and the sliding resistance generating portion may be configured in a small size.

  According to a ninth aspect of the present invention, in the air conditioner according to any one of the first to eighth aspects, the rotating body (19) has an opening (22) formed in the case (10). It is characterized by being a door (19) that opens and closes. According to the ninth aspect of the present invention, the self-excited vibration of the door (19) is formed by forming the groove and the protrusion that engage between the door (19) and the case (10) to be countered. And abnormal noise can be prevented.

In the invention according to claim 10, in the air conditioner according to claim 9, a cooling heat exchanger (18) for cooling the air disposed in the case (10) and passing therethrough, and the cooling heat A hot air passage in which a heating heat exchanger (21) for heating the air that has been disposed downstream of the exchanger (18) and that has passed through the cooling heat exchanger (18) is disposed; A hot air passage opening formed on the most upstream side of the air flow in the passage, a cold air passage (22) bypassing the heating heat exchanger (21), and formed on the most upstream side of the cold air passage (22). A cold air passage opening,
The door (19) is arranged on the upstream side of the air flow of the heat exchanger for heating (21) and rotates to adjust the opening ratio between the hot air passage opening and the cold air passage opening (19). ).

  Since the heat exchanger (21) for heating is arranged in the hot air passage, the cold air passage opening portion has less ventilation resistance than the hot air passage opening portion. Accordingly, the air mix door (19), which is arranged on the upstream side of the air flow of the heat exchanger (21) for heating and opens and closes the hot air passage and the cold air passage, is turned to a position where the cold air passage opening is slightly opened. When it is moved, air flows from the windward side of the air mix door (19) to the leeward side through a slight gap between the plate part (192) of the air mix door (19) and the cold air passage opening. To do.

  As a result, self-excited vibration is particularly likely to occur in the air mix door (19) due to the action described in the background art. According to the invention described in claim 10, by forming a sliding resistance generating portion between the air mix door (19) and the case (10), self-excited vibration of the air mix door (19) Abnormal noise can be prevented.

  According to an eleventh aspect of the present invention, in the air conditioner according to any one of the first to tenth aspects, the rotating body (32) is coupled to the door (19) and rotates to the door (19). It is a lever plate (32) for transmitting power. According to the eleventh aspect of the present invention, the door ((1) is also formed by forming a sliding resistance generating portion between the case (10) and the lever plate (32) coupled to the door (19) to be countered). 19) Self-excited vibration and abnormal noise can be prevented.

  Moreover, in invention of Claim 12, in the air conditioner of any one of Claims 1 thru | or 11, a rotary body (34) is connected with a lever plate (32), and is attached to a door (19). It is a link plate (34) for transmitting the rotational force. According to the twelfth aspect of the present invention, the door () is also formed by forming a sliding resistance generating portion between the link plate (34) connected to the door (19) to be countermeasured and the case (10). 19) Self-excited vibration and abnormal noise can be prevented. In addition, the code | symbol in the parenthesis as described in a claim and said each means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is an overall schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention. First, the outline of the ventilation system in which air is blown into the vehicle interior will be described. The vehicle air conditioner includes an air conditioning case (case) 10 made of a resin such as polypropylene and an air conditioning functional component disposed inside the air conditioning case 10.

  The air conditioning case 10 forms a ventilation path for air blown toward the vehicle interior, and an inside / outside air switching section 11 is disposed at the most upstream part of the ventilation path. The inside / outside air switching door 12 in the inside / outside air switching unit 11 switches between opening and closing the outside air introduction port 13 and the inside air introduction port 14. Thereby, outside air (vehicle compartment outside air) or inside air (vehicle compartment air) is switched and introduced into the inside / outside air switching unit 11. In this embodiment, the inside / outside air switching door 12 is driven by an electric drive device 12a such as a servo motor.

  A blower 15 is arranged on the downstream side of the air flow of the inside / outside air switching unit 11. The blower 15 blows the introduced air through the air conditioning case 10 toward the vehicle interior. The blower 15 is provided with a centrifugal multiblade fan 16 and a drive motor 17. The applied voltage (blower voltage) to the drive motor 17 is adjusted by a motor drive circuit 17a to control the rotational speed of the blower 15, that is, the amount of air blown into the passenger compartment.

  An evaporator 18 constituting a heat exchanger for cooling is disposed on the downstream side of the air flow of the blower 15 in the air conditioning case 10. As is well known, the evaporator 18 is a refrigerant evaporator that cools air by absorbing and evaporating low-pressure refrigerant decompressed by a decompression unit of a refrigeration cycle (not shown) from the air flowing in the air conditioning case 10.

  An air mix door (door, rotating body) 19 is arranged on the downstream side of the air flow of the evaporator 18 in the air conditioning case 10. On the downstream side of the air flow of the air mix door 19, a hot water heater core (heating heat exchanger) 21 that heats air using cooling water (hot water) of a vehicle engine (not shown) as a heat source is installed. A bypass passage (cold air passage, opening) 22 that bypasses the heater core 21 and flows air is formed on the side (upper portion) of the heater core 21.

  The air mix door 19 is a rotatable plate-like door, and is driven by an electric drive device 20 such as a servo motor in this embodiment. The air mix door 19 adjusts the air volume ratio between the air volume that passes through the heater core 21 and becomes warm air, and the air volume of the cool air that passes through the bypass passage 22. The temperature of the air blown into is adjusted.

  That is, in the space on the downstream side of the air flow of the heater core 21, the hot air after passing through the heater core 21 and the cold air from the bypass passage 22 can be mixed to create air of a desired temperature. Therefore, in the present embodiment, the air mix door 19 constitutes temperature adjusting means for the air blown into the vehicle interior.

  Furthermore, a blow-out mode switching unit is configured at the most downstream portion of the ventilation path in the air conditioning case 10. That is, a defroster opening 24 for blowing air to the inner surface of the vehicle windshield 23 is formed on the upper surface of the air conditioning case 10, and the defroster opening 24 is opened and closed by a rotatable plate-like defroster door 25. Further, a face opening 26 that blows air toward the upper body of the passenger in the passenger compartment is formed on the upper side of the air conditioning case 10 at a position on the rear side of the vehicle from the defroster opening 24. The face opening 26 is rotatable. It is opened and closed by a flat plate-like face door 27.

  Further, in the air conditioning case 10, a foot opening 28 for blowing air toward the feet of passengers in the passenger compartment is formed at a lower part of the face opening 26, and the foot opening 28 is a plate-like shape that is rotatable. Opened and closed by the foot door 29. These doors 25, 27, and 29 serving as blow-out mode doors are connected by a common link mechanism (not shown), and are driven by an electric drive device 30 such as a servo motor in this embodiment via this link mechanism.

  The air-conditioning control unit (ECU) 31 includes a known microcomputer composed of a CPU, ROM, RAM, and the like, and its peripheral circuits. A sensor signal from a sensor group (not shown) and an operation signal of an operation switch on an air conditioning control panel (not shown) are input to the air conditioning control device 31, and the above-described electric drive devices 12a, 20, 30 and the motor drive circuit 17a, etc. Output a control signal.

  Next, the structure around the door bearing portion will be described with reference to FIG. FIG. 2 is a partial detailed cross-sectional view of the door bearing portion in the first embodiment of the present invention. Hereinafter, an example applied to the air mix door 19 will be specifically described. The air mix door 19 includes a shaft portion (rotation shaft) 191 that is rotatably supported by the air conditioning case 10 as a basic structure, and a plate portion 192 that has one side coupled to the shaft portion 191.

  Furthermore, the air mix door 19A of the present embodiment is provided with a disk-shaped enlarged diameter portion 193 around the shaft portion 191, and the enlarged diameter portion along the circumferential direction of the shaft portion 191 (the rotation direction of the door). A cylindrical rotation-side protrusion 194 is erected on 193 toward the outer side in the axial direction. Further, in the air conditioning case 10A of the present embodiment corresponding to this, around the shaft hole portion (support hole) 101 that supports the shaft portion 191 of the air mix door 19, it is engaged with the previous rotation side protrusion 194. A cylindrical fixed side groove 103 is provided.

  A closed space gg is formed uniformly around the entire circumference between the rotation-side protrusion 194 and the fixed-side groove 103. The closed space gg is also formed continuously between the tip of the rotation-side protrusion 194 in the rotation axis direction and the groove bottom of the fixed-side groove 103. The closed space gg is filled with high-viscosity grease (high-viscosity fluid) KR so that sliding resistance is generated when the door is rotated. The disk-shaped enlarged diameter portion 193 serving as the base end portion of the rotation-side projection 194 and the opening-side end portion of the fixed-side groove 103 are in contact with each other, and the high viscosity filled in the closed space gg. The grease KR is prevented from flowing out.

  Next, the features and effects of this embodiment in the above configuration will be described. First, in an air conditioner having a case 10 that forms an air passage and a door (rotating body) 19 that is rotatably supported by the case 10, it is closed between the facing surfaces of the case 10 and the door 19. A space gg is formed, and the closed space gg is filled with the high viscosity fluid KR.

  According to this, when the door 19 rotates, the sliding resistance is reduced by the high-viscosity fluid KR filled in the closed space gg formed between the facing surfaces between the case 10 and the door 19. Will occur. Since this sliding resistance has a characteristic that the sliding resistance increases as the rotational speed of the door 19 increases, an effective sliding resistance corresponding to the fast movement of the door 19 called self-excited vibration can be generated. This can be suppressed.

  The sliding resistance having such characteristics prevents self-excited vibration and abnormal noise of the door 19 without causing problems such as generation of rubbing noise at low temperatures and increased sealing performance of the door 19. be able to. Further, since the high-viscosity fluid KR is enclosed in the closed space gg so as not to flow out, sliding resistance can be generated more effectively, and the encapsulated high-viscosity fluid KR is prevented from being deteriorated with time. The effect can be maintained over a long period of time.

  Specifically, the diameter-enlarged portion 193 provided around the rotation shaft 191 of the door 19, the rotation-side protrusion 194 provided along the circumferential direction of the diameter-increased portion 193, and the support hole of the case 10 A fixed-side groove portion 103 that engages with the rotation-side protrusion 194 is provided around the periphery of the rotation-side protrusion 194. A closed space gg is formed. According to this, even in such a structure, the closed space gg filled with the high-viscosity fluid KR can be formed between the facing surfaces between the case 10 and the door 19, and the above-described sliding The effect by dynamic resistance can be acquired.

  A closed space gg is also formed continuously between the tip of the rotation-side protrusion 194 in the rotation axis direction of the door 19 and the groove bottom of the fixed-side groove 103. According to this, generation | occurrence | production of abnormal noise can be prevented also with respect to the movement to the thrust direction of a rotating shaft. The door 19 is a rotating body 19 that opens and closes a bypass passage (opening) 22 formed in the case 10. According to this, the self-excited vibration and abnormal noise of the door 19 can be prevented by forming the groove and the protrusion that engage between the door 19 and the case 10 to be countered.

  Moreover, the warm air by which the evaporator 18 which cools the air which is arrange | positioned in the case 10 and cools, and the heater core 21 which is arrange | positioned in the air flow downstream from the evaporator 18 and heats the air which passed the evaporator 18 is arrange | positioned. A passage, a warm air passage opening formed on the most upstream side of the hot air passage, a bypass passage 22 bypassing the heater core 21, and a cold air passage opening formed on the most upstream side of the bypass passage 22 The door 19 is an air mix door 19 that is arranged on the upstream side of the air flow of the heater core 21 and rotates to adjust the opening ratio of the hot air passage opening and the cold air passage opening.

  Since the heater core 21 is disposed in the hot air passage, the cold air passage opening has less ventilation resistance than the hot air passage opening. Therefore, when the air mix door 19 arranged on the upstream side of the air flow of the heater core 21 to open and close the hot air passage and the cold air passage is rotated to a position where the cold air passage opening is slightly opened, the air mix door 19 is opened. Air flows in from the windward side of the air mix door 19 toward the leeward side through a slight gap between the plate portion 192 and the cold air passage opening.

  As a result, self-excited vibration is particularly likely to occur in the air mix door 19 due to the action described in the background art. However, by forming a sliding resistance generating portion between the air mix door 19 and the case 10, self-excited vibration and abnormal noise of the air mix door 19 can be prevented.

(Second Embodiment)
FIG. 3 is a partial detailed cross-sectional view of the door bearing portion in the second embodiment of the present invention. In each of the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and characteristic portions different from those in the above embodiment will be described. In the present embodiment, the relationship between the groove and the protrusion provided in the first embodiment is reversed.

  The air mix door 19B of the present embodiment is provided with a disk-shaped enlarged diameter portion 193 around the shaft portion 191, and the enlarged diameter portion 193 extends along the circumferential direction of the shaft portion 191 (the rotation direction of the door). A cylindrical rotation-side groove 195 is provided so as to open outward in the axial direction. In addition, in the air conditioning case 10B of the present embodiment corresponding to this, a cylindrical fixing that engages with the rotation side groove portion 195 around the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19B. A side protrusion 104 is provided.

  A closed space gg is formed uniformly between the rotation-side groove 195 and the fixed-side protrusion 104, and this closed space gg is formed at the tip of the fixed-side protrusion 104 in the rotation axis direction. It is also formed continuously with the groove bottom of the rotation side groove 195. The closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door rotates. Note that the wall surface portion of the air conditioning case 10B, which is the base end portion of the fixed-side protrusion 104, and the opening-side end portion of the rotation-side groove portion 195 are in contact with each other, and the high-viscosity grease filled in the closed space gg. KR does not flow out.

(Third embodiment)
FIG. 4 is a partial detailed cross-sectional view of the door bearing portion in the third embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. In the present embodiment, the lever plate 32A that is coupled to the air mix door 19C and transmits the rotational force to the air mix door 19C is used as a rotating body. The lever plate 32A is inserted into the distal end side of the shaft portion 191 of the air mix door 19C protruding from the air conditioning case 10C, and assembled so that the lever portion protrudes in a predetermined direction by a positioning mechanism (not shown). In addition, the link pin LP for connecting with a drive mechanism is provided in the front end side of the lever part which protruded in this embodiment.

  The air mix door 19 </ b> C of the present embodiment is a normal one composed of a shaft portion 191 and a plate portion 192. Instead, the lever plate 32A of the present embodiment is provided with a disk-shaped enlarged diameter portion 322 around a shaft portion insertion hole (rotating shaft hole) 321 into which the shaft portion 191 of the air mix door 19C is inserted, and the shaft A cylindrical rotation-side protrusion 323 is erected on the diameter-enlarged portion 322 so as to be along the circumferential direction of the portion 191 (the rotation direction of the door) toward the case side in the axial direction.

  Further, in the air conditioning case 10C of the present embodiment corresponding to this, around the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19C, it engages with the rotation-side protrusion 323 of the lever plate 32A. A cylindrical fixed-side groove 103 is provided toward the outer side of the case.

  A closed space gg is formed uniformly between the rotation-side protrusion 323 and the fixed-side groove 103, and this closed space gg is connected to the tip of the rotation-side protrusion 323 in the rotation axis direction. Further, it is also formed continuously with the groove bottom of the fixed side groove 103. The closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door rotates.

  The disk-shaped enlarged diameter portion 322 serving as the base end portion of the rotation-side protruding portion 323 and the opening-side end portion of the fixed-side groove portion 103 are in contact with each other, and the high viscosity filled in the closed space gg. The grease KR is prevented from flowing out. Thus, the self-excited vibration and noise of the door 19C can be prevented also by forming a groove and a protrusion that engage between the lever plate 32A coupled to the door 19C to be countermeasured and the air conditioning case 10C. be able to.

(Fourth embodiment)
FIG. 5 is a partial detailed cross-sectional view of the door bearing portion in the fourth embodiment of the present invention. The relationship between the groove and the protrusion provided in the third embodiment described above is reversed. The lever plate 32B of the present embodiment is provided with a disk-shaped enlarged diameter portion 322 around the shaft portion insertion hole 321 into which the shaft portion 191 of the air mix door 19C is inserted, and the circumferential direction of the shaft portion 191 (the rotation of the door). A cylindrical rotation-side groove 324 is provided in the enlarged diameter portion 322 so as to open along the axial direction of the case.

  Further, the air conditioning case 10D of the present embodiment corresponding to this engages with the rotation side groove portion 324 of the previous lever plate 32B around the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19C. A cylindrical fixed-side protrusion 104 is erected toward the outer side of the case. A closed space gg is formed uniformly between the rotation-side groove 324 and the fixed-side protrusion 104, and this closed space gg is formed at the tip of the fixed-side protrusion 104 in the rotation axis direction, It is also formed continuously with the groove bottom of the rotating side groove 324.

  The closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door rotates. The wall surface portion of the air conditioning case 10D serving as the base end portion of the fixed-side protrusion 104 and the opening-side end portion of the rotation-side groove portion 324 are in contact with each other, and the high-viscosity grease filled in the closed space gg. KR does not flow out.

(Fifth embodiment)
FIG. 6 is a partial detailed cross-sectional view of the door bearing portion in the fifth embodiment of the present invention. As a characteristic part different from each of the embodiments described above, a plurality of grooves and protrusions that are engaged between the door 19 and the air conditioning case 10 are configured. In the present embodiment, the rotation-side protrusion 194 and the rotation-side groove 195 are formed in the air mix door 19D, and the fixed-side groove 103 and the fixed-side protrusion 104 are formed in the air conditioning case 10E. According to this, a plurality of engaging grooves and protrusions may be configured to increase the sliding resistance during rotation. Further, if the sliding resistance is made equivalent, the height of the unevenness may be lowered and the sliding resistance generating portion may be configured in a small size.

(Sixth embodiment)
FIG. 7 is a partial detailed cross-sectional view of the door bearing portion in the sixth embodiment of the present invention. As in the fifth embodiment described above, a plurality of grooves and protrusions that are engaged between the lever plate 32 and the air conditioning case 10 are configured. In the present embodiment, the rotation-side protrusion 323 and the rotation-side groove 324 are formed on the lever plate 32C, and the fixed-side groove 103 and the fixed-side protrusion 104 are formed on the air conditioning case 10F. As described above, a plurality of grooves and protrusions that engage between the lever plate 32C and the air conditioning case 10F may be configured to increase the sliding resistance during rotation. Further, if the sliding resistance is made equivalent, the height of the unevenness may be lowered and the sliding resistance generating portion may be configured in a small size. In both the fifth and sixth embodiments, the relationship between the groove and the protrusion shown in FIGS. 6 and 7 may be reversed upside down.

(Seventh embodiment)
FIG. 8 is a plan view of a door link portion according to a seventh embodiment of the present invention, and FIG. 9 is a partial sectional side view of the door link portion of FIG. A different characteristic part from each embodiment mentioned above is demonstrated. In the present embodiment, a link plate 34A that is connected to the lever plate 32D and transmits the rotational force to the air mix door 19C is used as a rotating body. The air mix door 19C is a normal one composed of a shaft portion 191 and a plate portion 192, and the front end side of the shaft portion 191 protrudes from the shaft hole portion 101 of the air conditioning case 10G.

  The lever plate 32D is fitted on the distal end side of the shaft portion 191 of the air mix door 19C protruding from the air conditioning case 10G, and assembled so that the lever portion protrudes in a predetermined direction by a positioning mechanism (not shown). Note that a link groove LM for connecting to the link pin LP of the link plate 34A is formed on the distal end side of the lever portion protruding in the present embodiment.

  A drive-side lever plate 33 is assembled to the tip of the drive shaft 20a of the servo motor 20 as a drive device, and the link groove LM formed in the lever plate 33 and the other end side of the link plate 34A. Link pins LP are connected. The link plate 34A is configured such that a boss portion (rotating shaft) 341 is inserted into the shaft hole portion 101 of the air conditioning case 10G and is rotatably held by a locking claw 344 formed integrally.

  The link plate 34A of this embodiment is provided with a disk-shaped enlarged diameter portion 342 around the boss portion 341, and the diameter of the link plate 34A is increased along the circumferential direction of the boss portion 341 (the rotation direction of the link plate 34A). A cylindrical rotation-side protrusion 343 is erected on the portion 342 toward the case side in the axial direction.

  Further, the air conditioning case 10G of the present embodiment corresponding to this engages with the rotation-side protrusion 343 of the previous link plate 34A around the shaft hole portion 101 that supports the boss 341 of the link plate 34A. A cylindrical fixed-side groove 103 is provided toward the outer side of the case. A closed space gg is formed uniformly between the rotation-side protrusion 343 and the fixed-side groove 103, and this closed space gg is connected to the tip of the rotation-side protrusion 343 in the rotation axis direction. Further, it is also formed continuously with the groove bottom of the fixed side groove 103.

  The closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door rotates. The disk-shaped enlarged diameter portion 342 serving as the base end portion of the rotation-side protrusion 343 and the opening-side end portion of the fixed-side groove portion 103 are in contact with each other, and the high viscosity filled in the closed space gg. The grease KR is prevented from flowing out. Thus, the self-excited vibration and noise of the door 19C can be prevented also by forming the groove and the protrusion that engage between the link plate 34A connected to the door 19C to be counteracted and the case 10G. be able to.

(Eighth embodiment)
FIG. 10 is a partial detailed cross-sectional view of the door bearing portion in the eighth embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. The air mix door 19E of the present embodiment is provided with a disk-shaped enlarged diameter portion 193 around the shaft portion 191, and at the enlarged diameter portion 193 along the circumferential direction of the shaft portion 191 (the rotation direction of the door). A cylindrical rotating protrusion 194 is erected outward in the axial direction.

  In addition, the air conditioning case 10H of the present embodiment corresponding to this has a cylindrical shape around the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19E so as to face the previous rotation side protrusion 194. The fixed-side protrusion 104 is erected toward the door in the axial direction. A closed space gg is formed uniformly between the outer peripheral surface of the rotation-side protrusion 194 and the inner peripheral surface of the fixed-side protrusion 104, and the high-viscosity grease KR is formed in this closed space gg. The sliding resistance is generated when the door is rotated.

  In the present embodiment, a space ss is formed between the shaft portion 191 and the fixed-side protrusion 104. Even in such a structure, the closed space gg filled with the high-viscosity fluid KR can be formed between the opposing surfaces between the case 10H and the door (rotating body) 19E. The effect by dynamic resistance can be acquired.

(Ninth embodiment)
FIG. 11 is a partial detailed cross-sectional view of the door bearing portion in the ninth embodiment of the present invention. In this embodiment, the relationship of the protrusions provided in the eighth embodiment is reversed, and a closed space is formed between the inner peripheral surface of the rotation-side protrusion 194 and the outer peripheral surface of the fixed-side protrusion 104. gg is formed, and this closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door is rotated. Even in such a structure, the closed space gg filled with the high-viscosity fluid KR can be formed between the opposing surfaces between the case 10I and the door (rotating body) 19F. The effect by dynamic resistance can be acquired.

(10th Embodiment)
FIG. 12 is a partial detailed cross-sectional view of the door bearing portion in the tenth embodiment of the present invention. The ninth embodiment is different from the ninth embodiment described above in that the closed space gg is formed using the outer peripheral surface of the shaft hole portion 101 instead of the fixed-side protrusion 104. The air mix door 19G of this embodiment is provided with a disk-shaped enlarged diameter portion 193 around the shaft portion 191, and the enlarged diameter portion 193 extends along the circumferential direction of the shaft portion 191 (the rotation direction of the door). A cylindrical rotating protrusion 194 is erected outward in the axial direction.

  Moreover, the air conditioning case 10J of this embodiment corresponding to this extends the shaft hole part 101 which supports the shaft part 191 of the air mix door 19G toward the axial door side. Then, a closed space gg is formed between the inner peripheral surface of the rotation-side protrusion 194 and the outer peripheral surface of the shaft hole portion 101, and this closed space gg is filled with high-viscosity grease KR so as to slide when the door rotates. Dynamic resistance is generated. Even in such a structure, the closed space gg filled with the high-viscosity fluid KR can be formed between the facing surfaces between the case 10J and the door (rotating body) 19G. The effect by dynamic resistance can be acquired.

(Eleventh embodiment)
FIG. 13 is a partial detailed cross-sectional view of a door bearing portion in an eleventh embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. The air mix door 19 </ b> H of the present embodiment is provided with a disk-shaped enlarged diameter portion 193 around the shaft portion 191. Further, the air conditioning case 10K of the present embodiment corresponding to this has a cylindrical fixed-side protrusion 104 on the door side in the axial direction on the case inner surface side of the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19H. Standing towards

  Then, a closed space gg is formed between the inner peripheral surface of the fixed-side protrusion 104 and the outer surface of the shaft portion 191 of the air mix door 19H, and the closed space gg is filled with high-viscosity grease KR to rotate the door. Sometimes sliding resistance is generated. Even in such a structure, the closed space gg filled with the high-viscosity fluid KR can be formed between the opposing surfaces between the case 10K and the door (rotating body) 19H. The effect by dynamic resistance can be acquired.

(Twelfth embodiment)
FIG. 14 is a partial detailed cross-sectional view of a door bearing portion in a twelfth embodiment of the present invention. A different characteristic part from each embodiment mentioned above is demonstrated. The air mix door 19I of this embodiment is provided with a disk-shaped enlarged diameter portion 193 around the shaft portion 191. In addition, the air conditioning case 10L of the present embodiment corresponding to this has a cylindrical fixed side protrusion around the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19I so as to surround the enlarged diameter portion 193. The portion 104 is erected toward the door in the axial direction.

  A closed space gg is formed between the case side plane of the enlarged diameter portion 193 and the wall surface of the air conditioning case 10L. The closed space gg is filled with high-viscosity grease KR, and sliding resistance is generated when the door is rotated. Like to do. Even in such a structure, the closed space gg filled with the high-viscosity fluid KR can be formed between the facing surfaces between the case 10L and the door (rotating body) 19I. The effect by dynamic resistance can be acquired.

(13th Embodiment)
FIG. 15 is a partial detailed cross-sectional view of a door bearing portion in a thirteenth embodiment of the present invention. In this embodiment, the sliding resistance portion in the eighth embodiment is applied between the lever plate 32E and the air conditioning case 10M. The lever plate 32E of the present embodiment is provided with a disk-shaped enlarged diameter portion 322 around the shaft portion insertion hole 321 into which the shaft portion 191 of the air mix door 19C is inserted, and the circumferential direction of the shaft portion 191 (the rotation of the door). A cylindrical rotation-side protrusion 323 is erected on the diameter-expanded portion 322 so as to be along the axial direction of the case.

  Further, in the air conditioning case 10M of the present embodiment corresponding to this, around the shaft hole portion 101 that supports the shaft portion 191 of the air mix door 19C, the rotation side protrusion 323 of the previous lever plate 32E is opposed. In this way, the cylindrical fixed-side protrusion 104 is erected toward the outer side of the case. A closed space gg is formed between the outer peripheral surface of the rotation-side protrusion 323 and the inner peripheral surface of the fixed-side protrusion 104, and the closed space gg is filled with high-viscosity grease KR so that the door is rotated. Sliding resistance is generated.

(14th Embodiment)
FIG. 16 is a partial detailed cross-sectional view of the door bearing portion in the fourteenth embodiment of the present invention. The relationship between the two protrusions provided in the thirteenth embodiment described above is reversed. A closed space gg is formed between the inner peripheral surface of the rotation-side protrusion 323 provided on the lever plate 32F and the outer peripheral surface of the fixed-side protrusion 104 provided on the air conditioning case 10N, and the closed space gg has a high viscosity. Grease KR is filled so that sliding resistance is generated when the door rotates.

(Fifteenth embodiment)
FIG. 17 is a partial detailed cross-sectional view of the door bearing portion in the fifteenth embodiment of the present invention. In the present embodiment, one end portion of the shaft portion 191 of the air mix door 19L is a pin portion insertion hole (rotating shaft hole) 196, and the lever plate 32G extends from the outside of the air conditioning case 10O to the pin portion insertion hole 196. A pin portion (rotating shaft) 325 formed by projecting from is inserted and coupled.

  Further, in the present embodiment, a locking claw 326 formed by protruding from the lever plate 32G is locked in the shaft hole portion 101 of the air conditioning case 10O and is held rotatably. The sliding resistance part in 3rd Embodiment (FIG. 4) is applied between the lever plate 32G and the air-conditioning case 10O to the door bearing part of such a structure.

  The lever plate 32G of the present embodiment is provided with a disk-shaped enlarged diameter portion 322 around the pin portion 325, and is cylindrical on the enlarged diameter portion 322 along the circumferential direction of the pin portion 325 (the rotation direction of the door). The rotation side protrusion 323 having the shape is erected toward the case side in the axial direction. Also, in the air conditioning case 10O of the present embodiment corresponding to this, a cylindrical fixed side groove 103 that engages with the rotation side protrusion 323 of the previous lever plate 32G is provided around the shaft hole 101. It is provided towards the outside of the.

  A closed space gg is formed uniformly between the rotation-side protrusion 323 and the fixed-side groove 103, and this closed space gg is connected to the tip of the rotation-side protrusion 323 in the rotation axis direction. Further, it is also formed continuously with the groove bottom of the fixed side groove 103. The closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door rotates.

(Sixteenth embodiment)
FIG. 18 is a partial detailed cross-sectional view of the door bearing portion in the sixteenth embodiment of the present invention. The relationship between the groove and the protrusion provided in the fifteenth embodiment described above is reversed. The lever plate 32H is provided with a rotation side groove 324, the air conditioning case 10P is provided with a fixed side protrusion 104, a closed space gg is formed therebetween, and the closed space gg is filled with high-viscosity grease KR to rotate the door. Sometimes sliding resistance is generated.

(17th Embodiment)
FIG. 19 is a partial detailed cross-sectional view of a door bearing portion in a seventeenth embodiment of the present invention. The sliding resistance portion in the thirteenth embodiment (FIG. 15) is applied to the door bearing portion having the structure described in the fifteenth embodiment (FIG. 17). The lever plate 32I of the present embodiment is provided with a disk-shaped enlarged diameter portion 322 around the pin portion 325, and the enlarged diameter portion 322 extends along the circumferential direction of the pin portion 325 (the rotation direction of the door). A cylindrical rotating protrusion 323 is erected toward the case in the axial direction.

  In addition, in the air conditioning case 10Q of the present embodiment corresponding to this, a cylindrical fixed-side protrusion 104 is provided around the shaft hole 101 so as to face the rotation-side protrusion 323 of the previous lever plate 32I. Erected toward the outside of the case. A closed space gg is formed between the outer peripheral surface of the rotation-side protrusion 323 and the inner peripheral surface of the fixed-side protrusion 104, and the closed space gg is filled with high-viscosity grease KR so that the door is rotated. Sliding resistance is generated.

(Eighteenth embodiment)
FIG. 20 is a partial detailed cross-sectional view of the door bearing portion in the eighteenth embodiment of the present invention. The relationship between the two protrusions provided in the seventeenth embodiment described above is reversed. A closed space gg is formed between the inner peripheral surface of the rotation-side protrusion 323 provided on the lever plate 32J and the outer peripheral surface of the fixed-side protrusion 104 provided on the air conditioning case 10R, and the closed space gg has a high viscosity. Grease KR is filled so that sliding resistance is generated when the door rotates.

(Nineteenth embodiment)
FIG. 21 is a partial detailed cross-sectional view of a door bearing portion in a nineteenth embodiment of the present invention. The sliding resistance part in 12th Embodiment is applied to the door bearing part of the structure demonstrated in 15th Embodiment. The lever plate 32K of this embodiment is provided with a disk-shaped enlarged diameter portion 322 around the pin portion 325.

  Further, in the air conditioning case 10S of the present embodiment corresponding to this, the cylindrical fixed side protrusion 104 is directed to the axial door side so as to surround the enlarged diameter portion 322 around the shaft hole portion 101. Standing up. A closed space gg is formed between the case side plane of the enlarged diameter portion 322 and the wall surface of the air conditioning case 10S. The closed space gg is filled with high-viscosity grease KR, and sliding resistance is generated when the door is rotated. Like to do.

(20th embodiment)
FIG. 22 is a partial detailed cross-sectional view of the link plate support portion in the twentieth embodiment of the present invention. The sliding resistance portion in the thirteenth embodiment (FIG. 15) is applied to the link plate support portion having the structure described in the seventh embodiment (FIGS. 7 and 8). The link plate 34B of the present embodiment is provided with a disk-shaped enlarged diameter portion 342 around the boss portion 341, and the enlarged diameter portion 342 extends along the circumferential direction of the boss portion 341 (the rotation direction of the door). A cylindrical rotating protrusion 343 is erected toward the case in the axial direction.

  In addition, in the air conditioning case 10T of the present embodiment corresponding to this, a cylindrical fixed side protrusion 104 is provided around the shaft hole 101 so as to face the rotation side protrusion 343 of the previous link plate 34B. Erected toward the outside of the case. A closed space gg is formed between the outer peripheral surface of the rotation-side protrusion 343 and the inner peripheral surface of the fixed-side protrusion 104, and the closed space gg is filled with high-viscosity grease KR so that the door is rotated. Sliding resistance is generated.

(21st Embodiment)
FIG. 23 is a partial detailed cross-sectional view of the link plate support portion according to the twenty-first embodiment of the present invention. The relationship between the two protrusions provided in the twentieth embodiment described above is reversed. A closed space gg is formed between the inner peripheral surface of the rotation-side protrusion 343 provided on the link plate 34C and the outer peripheral surface of the fixed-side protrusion 104 provided on the air conditioning case 10U, and the closed space gg has a high viscosity. Grease KR is filled so that sliding resistance is generated when the door rotates.

(Twenty-second embodiment)
FIG. 24 is a partial detailed cross-sectional view of a link plate support portion in a twenty-second embodiment of the present invention. In this embodiment, the boss portion insertion hole (rotating shaft hole) 345 of the link plate 34D is fitted into the boss portion (support shaft) 105 protruding from the air conditioning case 10V, and fastened with the screw 36 via the washer 35. It is designed to hold it freely. The sliding resistance portion in the seventh embodiment (FIGS. 8 and 9) is applied between the link plate 34D and the air conditioning case 10V to the link plate support portion having such a structure.

  The link plate 34D of the present embodiment is provided with a disk-shaped enlarged diameter portion 342 around the boss portion insertion hole 345 and along the circumferential direction of the boss portion insertion hole 345 (the rotation direction of the link plate). A cylindrical rotation-side protrusion 343 is erected on the diameter-expanded portion 342 toward the case side in the axial direction. Further, in the air conditioning case 10V of the present embodiment corresponding to this, a cylindrical fixed side groove 103 that engages with the rotation side protrusion 343 of the previous link plate 34D is provided around the boss portion 105. It is provided towards the outside.

  A closed space gg is formed uniformly between the rotation-side protrusion 343 and the fixed-side groove 103, and this closed space gg is connected to the tip of the rotation-side protrusion 343 in the rotation axis direction. Further, it is also formed continuously with the groove bottom of the fixed side groove 103. The closed space gg is filled with high-viscosity grease KR so that sliding resistance is generated when the door rotates.

(23rd Embodiment)
FIG. 25 is a partial detailed cross-sectional view of the link plate support portion in the twenty-third embodiment of the present invention. The relationship between the groove and the protrusion provided in the above-described twenty-second embodiment is reversed. The link plate 34E is provided with a rotation-side groove 346, the air conditioning case 10W is provided with a fixed-side protrusion 104, a closed space gg is formed therebetween, and the closed space gg is filled with high-viscosity grease KR. A sliding resistance is generated when the door rotates.

(24th Embodiment)
FIG. 26 is a partial detailed cross-sectional view of the link plate support portion in the twenty-fourth embodiment of the present invention. The sliding resistance portion in the thirteenth embodiment (FIG. 15) is applied to the link plate support portion having the structure described in the twenty-second embodiment. The link plate 34F of the present embodiment is provided with a disk-shaped enlarged diameter portion 342 around the boss portion insertion hole 345 and along the circumferential direction of the boss portion insertion hole 345 (the rotation direction of the link plate). A cylindrical rotation-side protrusion 343 is erected on the enlarged diameter portion 342 so as to face the case in the axial direction.

  Further, in the air conditioning case 10X of the present embodiment corresponding to this, a cylindrical fixed side protrusion 104 is provided around the boss part 105 so as to face the rotation side protrusion 343 of the previous link plate 34F. Stands outward from the case. A closed space gg is formed between the outer peripheral surface of the rotation-side protrusion 343 and the inner peripheral surface of the fixed-side protrusion 104, and the closed space gg is filled with high-viscosity grease KR so that the door is rotated. Sliding resistance is generated.

(25th Embodiment)
FIG. 27 is a partial detailed cross-sectional view of the link plate support portion in the twenty-fifth embodiment of the present invention. The relationship between the two protrusions provided in the twenty-fourth embodiment described above is reversed. A closed space gg is formed between the inner peripheral surface of the rotation-side protrusion 343 provided on the link plate 34G and the outer peripheral surface of the fixed-side protrusion 104 provided on the air conditioning case 10Y, and the closed space gg has a high viscosity. Grease KR is filled so that sliding resistance is generated when the door rotates.

(26th Embodiment)
FIG. 28 is a partial detailed cross-sectional view of the link plate support portion in the twenty-sixth embodiment of the present invention. The sliding resistance portion in the tenth embodiment (FIG. 12) is applied to the link plate support portion having the structure described in the twenty-second embodiment (FIG. 24). The link plate 34H of the present embodiment is provided with a disk-shaped enlarged diameter portion 342 around the boss portion insertion hole 345 and along the circumferential direction of the boss portion insertion hole 345 (the rotation direction of the link plate). A cylindrical rotation-side protrusion 343 is erected on the enlarged diameter portion 342 so as to face the case in the axial direction.

  Then, a closed space gg is formed between the inner peripheral surface of the rotation side protrusion 343 and the outer peripheral surface of the boss portion 105 of the corresponding air conditioning case 10Z of the present embodiment, and the high-viscosity grease is formed in the closed space gg. KR is filled so that sliding resistance is generated when the door rotates. An outer ring portion (link support portion) 106 is formed around the sliding resistance portion having such a configuration via a space ss.

(Other embodiments)
FIG. 29 is a partial detailed cross-sectional view of a door bearing portion according to another embodiment of the present invention. As shown in FIG. 29, the outermost periphery of the sliding resistance generating portion may be surrounded by ribs 197 so as to cover the outer peripheral end of the closed space gg. Thereby, even if the door 19M floats upward by the amount of thrust back from the bearing portion of the air conditioning case 10A in FIG. 29, the degree of sealing of the closed space gg can be maintained.

  Moreover, in the above-mentioned embodiment, although this invention is applied to the air mix door 19 provided in the upstream of the heater core 21, between the foot blower outlet 28 and the face blower outlet 26 with less ventilation resistance, for example. Even in a vehicle air conditioner configured with a face / foot door that switches the air flow direction, self-excited vibration is generated when the face air outlet 26 is slightly opened. Therefore, the present invention may be applied to such a face / foot door.

  Further, the present invention may be applied to other inside / outside air switching doors 12 and blowing mode switching doors 25, 27, 29, and the like. In the above-described embodiment, each door is driven by a motor, but may be manually driven (manual switching). Moreover, in the above-mentioned embodiment, although applied to the vehicle air conditioner, this invention is not limited to embodiment mentioned above, You may apply to a stationary type air conditioner.

  In addition, even when the opening provided on the leeward side of the air passage is a door that opens and closes by rotating, if the opening is slightly opened, a slight gap between the door and the opening Air flows in vigorously, and the pressure difference between the space on the windward side and the space on the leeward side of the door increases. As a result, self-excited vibration occurs as described above, and the present invention may be applied to such a door. Therefore, the kind of door to which the present invention is applied is not particularly limited.

1 is an overall schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention. It is a partial detail sectional view of the door bearing part in a 1st embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 2nd embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 3rd embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 4th embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 5th embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 6th embodiment of the present invention. It is a top view of the door link part concerning a 7th embodiment of the present invention. It is a partial cross section side view of the door link part of FIG. It is a partial detail sectional view of a door bearing part in an 8th embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 9th embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 10th embodiment of the present invention. It is a partial detailed sectional view of a door bearing portion in an eleventh embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 12th embodiment of the present invention. It is a partial detail sectional view of a door bearing part in a 13th embodiment of the present invention. It is a fragmentary detailed sectional view of the door bearing part in 14th Embodiment of this invention. It is a partial detail sectional view of a door bearing part in a 15th embodiment of the present invention. It is a partial detail sectional view of the door bearing part in a 16th embodiment of the present invention. It is a partial detailed sectional view of a door bearing portion in a seventeenth embodiment of the present invention. It is a partial detail sectional view of a door bearing part in an 18th embodiment of the present invention. It is a partial detailed sectional view of a door bearing portion in a nineteenth embodiment of the present invention. It is a partial detail sectional view of a link plate support part in a 20th embodiment of the present invention. It is a fragmentary detailed sectional view of the link plate support part in a 21st embodiment of the present invention. It is a fragmentary detailed sectional view of the link plate support part in a 22nd embodiment of the present invention. It is a fragmentary detailed sectional view of the link plate support part in a 23rd embodiment of the present invention. It is a fragmentary detailed sectional view of the link plate support part in a 24th embodiment of the present invention. It is a fragmentary detailed sectional view of the link plate support part in a 25th embodiment of the present invention. It is a fragmentary detailed sectional view of the link plate support part in a 26th embodiment of the present invention. It is a partial detail sectional view of a door bearing part concerning other embodiments of the present invention.

Explanation of symbols

10 ... Air-conditioning case (case)
18 ... Evaporator (cooling heat exchanger)
19 ... Air mix door (door, rotating body)
21 ... Heater core (heat exchanger for heating)
22 ... Bypass passage (cold air passage, opening)
32 ... Lever plate (rotating body)
34 ... Link plate (rotating body)
101 ... Shaft hole (support hole)
103 ... Fixed side groove 104 ... Fixed side protrusion 105 ... Boss part (support shaft)
191 ... Shaft (rotating shaft)
193 ... Diameter-enlarged part 194 ... Rotating side protrusion 195 ... Rotating side groove part 196 ... Pin part insertion hole (rotating shaft hole)
321 ... Shaft insertion hole (rotating shaft hole)
322 ... Diameter-enlarged portion 323 ... Rotating side protrusion 324 ... Rotating side groove portion 325 ... Pin portion (rotating shaft)
341 ... Boss part (rotating shaft)
342 ... Diameter-enlarged part 343 ... Rotating side protrusion 345 ... Boss part insertion hole (rotating shaft hole)
346 ... Rotating side groove gg ... Closed space KR ... High viscosity grease (high viscosity fluid)

Claims (12)

A case (10) forming an air passage;
In the air conditioner having a rotating body (19, 32, 34) rotatably supported by the case (10),
A closed space (gg) is formed between the facing surfaces of the case (10) and the rotating body (19, 32, 34), and the closed space (gg) is filled with a high-viscosity fluid (KR). The air conditioner characterized by being made.   A fixed-side protrusion (104) is provided around the support hole (101) of the case (10), and the inner peripheral surface of the fixed-side protrusion (104) and the rotating shaft (19) of the rotating body (19) The air-conditioning apparatus according to claim 1, wherein the closed space (gg) is formed between the outer surface and the outer surface of 191).   A diameter-expanded portion (193, 322) is provided around the rotation shaft (191, 325) of the rotating body (19, 32), the case-side plane of the diameter-expanded portion (193, 322), and the case ( The air conditioner according to claim 1, wherein the closed space (gg) is formed between the wall surface of 10). An enlarged-diameter portion (193, 322, 342) provided around the rotation shaft (191, 325, 341) or the rotation shaft hole (196, 321, 345) of the rotation body (19, 32, 34); ,
Rotating side protrusions (194, 323, 343) provided along the circumferential direction on the enlarged diameter portions (193, 322, 342);
A fixed-side protrusion (104) provided around the support hole (101) of the case (10),
The closed space (gg) is formed between an inner peripheral surface or an outer peripheral surface of the rotation-side protrusion (194, 323, 343) and an inner peripheral surface or an outer peripheral surface of the fixed-side protrusion (104). The air conditioner according to claim 1, wherein the air conditioner is provided.   The air conditioner according to claim 4, wherein an outer peripheral surface of the support hole (101) or a support shaft (105) is used as an outer peripheral surface of the fixed-side protrusion. An enlarged diameter portion (193, 322, 342) provided around the rotating shaft (191, 325, 341) or the rotating shaft hole (196, 321, 345) of the rotating body (19, 32, 34);
A rotation-side groove (195, 324, 346) or a rotation-side protrusion (194, 323, 343) provided along the circumferential direction in the enlarged diameter portion (193, 322, 342);
Fixing which engages with the rotation side groove (195, 324) or the rotation side protrusion (194, 323, 343) around the support hole (101) or the support shaft (105) of the case (10). Side protrusions (104) or fixed side grooves (103),
An inner peripheral surface or an outer peripheral surface of the rotation-side groove (195, 324, 346) or the rotation-side protrusion (194, 323, 343), the fixed-side protrusion (104), or the fixed-side groove (103). The air-conditioning apparatus according to claim 1, wherein the closed space (gg) is formed between the inner peripheral surface or the outer peripheral surface of the air-conditioner.   The rotation-side projections (194, 323, 343) or the fixed-side projections (104) in the rotation axis direction of the rotation body (19, 32, 34) and the rotation-side groove (195, 324, 346) or the groove side of the fixed side groove portion (103), the closed space (gg) is continuously formed.   The rotating body (19) is formed with the rotating side protrusions (194, 323) and the rotating side groove portions (195, 324), and the case (10) is fixed with the fixed side groove portion (103) and the fixed portion. The air conditioner according to claim 6 or 7, wherein a side protrusion (104) is formed.   The said rotary body (19) is a door (19) which opens and closes the opening part (22) formed in the said case (10), The any one of Claims 1 thru | or 8 characterized by the above-mentioned. Air conditioner. A cooling heat exchanger (18) for cooling the air passing through the case (10); and
Hot air in which a heating heat exchanger (21) for heating air that is disposed downstream of the cooling heat exchanger (18) and that has passed through the cooling heat exchanger (18) is disposed. A passage,
A hot air passage opening formed on the most upstream side of the air flow in the hot air passage;
A cold air passage (22) bypassing the heating heat exchanger (21);
A cold air passage opening formed on the most upstream side of the air flow of the cold air passage (22),
The door (19) is arranged on the upstream side of the air flow of the heating heat exchanger (21) and rotates to adjust the opening ratio of the hot air passage opening and the cold air passage opening. The air conditioner according to claim 9, wherein the air conditioner is a mixed door (19).   The rotating body (32) is a lever plate (32) that is coupled to the door (19) to transmit rotational force to the door (19). The air conditioner of Claim 1.   The rotating body (34) is a link plate (34) connected to the lever plate (32) for transmitting rotational force to the door (19). The air conditioner according to any one of claims.

Images