JP2018114779A - Blower of vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rain water, etc. from entering into a motor body at low costs and enable cooling air to be discharged from the motor body without changing a structure of a fan motor.SOLUTION: A water entry prevention cover 60 which extends in a radial direction of a rotary shaft 4a and prevents water entering from the outside of a vehicle cabin from entering into a motor body 4b is provided between a fan 3 and the motor body 4b in the rotary shaft 4a. A gap is formed between the water entry prevention cover 60 and the motor body 4b.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a blower of a vehicle air conditioner mounted on, for example, an automobile, and particularly relates to a technical field of a structure that prevents water from entering a motor that drives a fan.

  Conventionally, a vehicle air conditioner includes a cooling heat exchanger and a heating heat exchanger, an air conditioning unit that houses an air mix damper, a blowing direction switching damper, and the like, and a blower that blows air for air conditioning to the air conditioning unit. These are housed inside the instrument panel of the passenger compartment.

  Japanese Patent Application Laid-Open No. 2004-133867 discloses a first intake that selects and inhales one of air outside a vehicle and air inside the vehicle in a two-layer air blower that can blow both air outside the vehicle and air inside the vehicle. A scroll casing having a mouth and a second suction port, a first fan for sucking air from the first suction port, a second fan for sucking air from the second suction port, a first fan, The structure provided with the fan motor which has a rotating shaft which drives a 2nd fan is disclosed. The first suction port is positioned above the second suction port, and the first fan is positioned above the second fan. Further, a blower cover is provided at the lower part of the scroll casing so as to cover the second suction port, and a fan motor is fixed to the blower cover. In addition, a cylindrical member extending along the axial direction of the rotation shaft is provided inside the second suction port so as to cover the rotation shaft of the fan motor.

Japanese Patent No. 5556689

  By the way, in the case of the vehicle air conditioner, as disclosed in Patent Document 1, an outside air inlet for sucking air outside the passenger compartment is formed in the casing. Since the outside air inlet port communicates with the outside of the passenger compartment through an opening formed in the cowl or the like of the vehicle body, for example, rain water or water during car washing (hereinafter referred to as rain water or the like) passes through the opening of the cowl. It is possible to enter the outside air inlet.

  Rainwater or the like that has entered the outside air inlet naturally flows through the air passage inside the casing toward the lower side of the casing. At this time, since the fan motor is disposed on the lower side of the casing, rain water or the like may enter the motor, and as a result, the fan motor may be damaged.

  In Patent Document 1, a cylindrical member extending along the axial direction of the rotation shaft is provided so as to cover the rotation shaft of the fan motor. However, since the upper end portion of the cylindrical member is open, rainwater, etc. May enter from the upper end of the cylindrical member.

  On the other hand, it is conceivable to provide a waterproof structure for the fan motor itself, but there has been a problem that the cost of the structural change of the fan motor is significantly increased. In addition, if the fan motor itself is provided with a waterproof structure, there is a problem that it is difficult to introduce cooling air into the motor body.

  The present invention has been made in view of the above points, and the object of the present invention is to prevent rainwater and the like from entering the motor body at low cost without changing the structure of the fan motor, and the motor body. It is to enable the introduction of cooling air into the air.

  In order to achieve the above object, in the present invention, a water intrusion prevention cover is provided on the rotating shaft of the fan motor, and a gap is secured between the water intrusion prevention cover and the motor body.

  1st invention is the air blower of the vehicle air conditioner which suck | inhales the air outside a vehicle interior, and the air inside a vehicle interior, and ventilates to an air-conditioning unit. A rotation center line extending in the vertical direction, a fan fixed to the fan and extending downward from the fan, and fixed to the lower side of the blower casing and of the rotation shaft. A fan motor having a motor body connected to the lower side and driving the rotating shaft, and provided between the fan and the motor body in the rotating shaft so as to extend in a radial direction of the rotating shaft, A water intrusion prevention cover for preventing water entering from the outside from entering the inside of the motor body, and a gap is provided between the water intrusion prevention cover and the motor body. Characterized in that it is formed.

  That is, for example, when rainwater or the like enters the air passage of the blower casing from outside the passenger compartment, the fan motor is fixed to the lower side of the blower casing, so that rainwater or the like flows toward the fan motor. . At this time, since the water intrusion prevention cover is provided between the fan and the motor main body on the rotating shaft so as to extend in the radial direction of the rotating shaft, rainwater or the like flowing toward the fan motor is prevented by the water intrusion preventing cover. It will not flow downward. This prevents rainwater or the like from entering the motor body without providing a waterproof structure in the fan motor itself.

  In addition, since a gap is formed between the water intrusion prevention cover and the motor main body, the cooling air can be discharged from the motor main body by this gap.

  According to a second invention, in the first invention, the water intrusion prevention cover is formed with a press-fitting hole into which the rotary shaft is press-fitted, and the water intrusion prevention cover has the rotary shaft press-fitted into the press-fitting hole. The rotating shaft is fixed to the rotating shaft.

  According to this configuration, when the water intrusion prevention cover is fixed to the rotating shaft, it is only necessary to press-fit the rotating shaft into the press-fitting hole, and the fixing structure is simplified.

  According to a third invention, in the first or second invention, a cooling air discharge port is opened above the motor body, and the water intrusion prevention cover is arranged in the radial direction of the rotary shaft. It is formed so that it may extend outside rather than the peripheral part of an exit.

  According to this configuration, since the water ingress prevention cover extends outward from the peripheral edge of the cooling air discharge port of the motor body, rainwater or the like adheres to the upper surface of the water ingress prevention cover, and the peripheral edge of the water ingress prevention cover When flowing downward from the section, it is possible to flow outward from the peripheral edge of the cooling air discharge port. This prevents the rainwater or the like from entering the cooling air outlet.

  According to a fourth invention, in the third invention, a peripheral edge portion of the water intrusion prevention cover is positioned below the cooling air discharge port.

  According to this configuration, when rainwater or the like adheres to the upper surface of the water intrusion prevention cover and flows downward from the periphery of the water ingress prevention cover, the periphery of the water ingress prevention cover is below the cooling air discharge port. Since it is located, rainwater etc. will flow below the cooling air outlet. This prevents the rainwater or the like from entering the cooling air outlet.

  According to a fifth invention, in the third or fourth invention, a peripheral wall portion extending upward and surrounding the rotation shaft is formed around the cooling air discharge port on the upper side of the motor body. It is characterized by that.

  According to this configuration, when rain water or the like is rolled up from the lower side to the upper side than the cooling air discharge port due to the wind flow (wind pressure) in the blower casing, the peripheral wall portion is formed around the cooling air discharge port. Therefore, the peripheral wall portion prevents the rainwater and the like that has rolled up from entering the cooling air discharge port.

  In a sixth aspect based on the fifth aspect, the peripheral wall portion is discontinuous in the circumferential direction of the rotation shaft.

  According to this configuration, since the peripheral wall portion is intermittent in the circumferential direction, it becomes possible to sufficiently discharge the cooling air from the motor body.

  According to the first aspect of the present invention, since the water intrusion prevention cover is provided on the rotating shaft of the fan motor, and a gap is formed between the water intrusion prevention cover and the motor body, intrusion of rainwater or the like into the motor body at a low cost. Can be prevented, and cooling air from the motor body can be discharged.

  According to the second aspect of the present invention, since the water intrusion prevention cover can be fixed to the rotation shaft by press-fitting the rotation shaft into the press-fitting hole of the water intrusion prevention cover, a structure for fixing the water intrusion prevention cover is provided. Can be simple.

  According to the third aspect of the invention, since the water ingress prevention cover extends outward from the cooling air discharge port, rainwater or the like adheres to the upper surface of the water ingress prevention cover and moves downward from the peripheral edge of the water ingress prevention cover. When it flows, it is possible to prevent the rainwater and the like from entering the cooling air outlet.

  According to the fourth invention, since the peripheral edge portion of the water intrusion prevention cover is located below the cooling air discharge port, it is possible to prevent rainwater or the like from entering the cooling air discharge port.

  According to the fifth aspect of the invention, since the peripheral wall portion extending upward around the cooling air discharge port on the upper side of the motor body is formed, rainwater or the like flows from the lower side than the cooling air discharge port due to the flow of the wind in the blower casing. It is possible to suppress the rainwater that has rolled up from entering the cooling air outlet.

  According to the sixth invention, since the peripheral wall portion formed on the upper side of the motor body is discontinuous in the circumferential direction of the rotating shaft, the cooling air from the motor body is sufficiently supplied while suppressing the intrusion of rainwater or the like. Can be discharged.

It is a front view of the air blower of the vehicle air conditioner according to the embodiment. It is a left view of the air blower of the vehicle air conditioner according to the embodiment. It is a right view of the air blower of the vehicle air conditioner which concerns on embodiment. It is a rear view of the air blower of the vehicle air conditioner which concerns on embodiment. It is a bottom view of the air blower of the vehicle air conditioner according to the embodiment. It is a disassembled perspective view of the air blower of the vehicle air conditioner which concerns on embodiment. It is sectional drawing of the air blower of the vehicle air conditioner which concerns on embodiment. FIG. 8 is a diagram corresponding to FIG. 7 according to Modification 1 of the embodiment. It is the perspective view which looked at the motor body concerning the modification 1 of an embodiment from the upper part. FIG. 9 is a view corresponding to FIG. 7 according to a second modification of the embodiment. It is a top view of the water penetration prevention cover concerning modification 2 of an embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a blower 1 of a vehicle air conditioner according to an embodiment of the present invention. Although not shown, this blower 1 is for blowing air for air conditioning to an air conditioning unit of a vehicle air conditioner, and is housed inside an instrument panel (not shown) provided at the front end of the vehicle interior. The While the blower 1 is disposed on the passenger seat side (the vehicle right side in this embodiment) in the instrument panel, the air conditioning unit is disposed at a substantially central portion in the vehicle width direction. In the description of this embodiment, the right side of the vehicle is simply referred to as “right”, the left side of the vehicle is simply referred to as “left”, the front side of the vehicle is simply referred to as “front”, and the rear side of the vehicle is simply referred to as “rear”.

  The air conditioning unit includes a cooling heat exchanger and a heating heat exchanger accommodated in the air conditioning casing, and among the air conditioning air blown from the blower 1, the amount of air passing through the cooling heat exchanger and the heating air Air mix damper that changes the amount of air passing through the heat exchanger, and the generated conditioned air is selectively supplied to each part of the passenger compartment (defroster outlet, vent outlet, heat outlet, rear vent outlet, etc.) A plurality of blowing direction switching dampers and the like are provided. This air conditioning unit introduces only air outside the vehicle compartment (outside air) to adjust the temperature, introduces only air inside the vehicle compartment (inside air) to adjust the temperature, and air outside the vehicle compartment and air inside the vehicle compartment. It is an inside / outside air two-layer flow unit configured to be able to adjust the temperature by introducing both of them.

(Overall configuration of the blower)
The blower 1 is configured to be able to blow air-conditioning air to the air-conditioning unit in a state of two-layer flow of the inside and outside air as necessary so as to correspond to the two-layer flow structure of the inside and outside air of the air-conditioning unit. That is, as shown in FIGS. 2 to 7, the blower 1 includes a resin blower casing 2, an air passage opening / closing structure for opening and closing an air passage formed inside the blower casing 2, and a blower fan 3. And a fan motor 4 and an air filter 5. As shown in FIGS. 1 to 6, the blower casing 2 is configured to be split at an intermediate portion in the vertical direction, and the upper casing member 20 that constitutes the substantially upper half of the blower casing 2 and the blower casing 2. The lower casing member 21 which comprises a lower half part is provided. Further, the upper casing member 20 is divided at the middle portion in the left-right direction, and is composed of a left side member 22 and a right side member 23. Further, the lower casing member 21 is divided into three members in the vertical direction, and includes an upper member 24, an intermediate member 25, and a lower member 26. In addition, the division | segmentation structure of the casing 2 is not restricted to this, It can comprise freely.

  On the front side of the upper portion of the upper casing member 20, an outside air introduction duct portion 20a having an opening for introducing air outside the vehicle compartment (outside air) is formed so as to protrude upward and forward. Although not shown, a communication hole with the outside of the passenger compartment formed in the cowl portion of the vehicle body is connected to the opening formed in the distal end portion of the outside air introduction duct portion 20a. On the other hand, on the rear side of the upper part of the upper casing member 20, a plurality of inside air introduction ports 20b for introducing the air (inside air) in the vehicle compartment are formed so as to open into the vehicle compartment. The inside air introduction port 20 b is also opened at the upper part of the right side wall portion of the upper casing member 20.

  As shown in FIG. 7, an air introduction passage (air passage) 20 c extending from the upper portion to the lower portion of the upper casing member 20 is provided in the upper casing member 20. The air introduction passage 20c communicates with the downstream end of the outside air introduction duct portion 20a and also communicates with the inside air introduction port 20b, so that only one or both of the outside air and the inside air can be introduced into the air introduction passage 20c at the same time. ing.

  Further, an upper partition member 27 is disposed in the air introduction passage 20 c inside the upper casing member 20. The upper partition member 27 is disposed at an intermediate portion in the left-right direction in the air introduction passage 20 c, extends in the front-rear direction, and also extends in the vertical direction, and is fixed to the upper casing member 20. Further, the range in which the upper partition member 27 is disposed is only an intermediate portion in the air flow direction of the air introduction passage 20c, and the intermediate portion of the air introduction passage 20c is separated from the left passage 20d and the right passage 20e by the upper partition member 27. Divided into The left passage 20d and the right passage 20e extend in the vertical direction. The left-right dimension of the left passage 20d is set longer than the left-right dimension of the right passage 20e.

  The air filter 5 is disposed downstream of the upper partition member 27 in the air introduction passage 20c in the air flow direction. The air filter 5 is a thick plate that is formed by bending a filter medium into a pleat shape, and is fixed to the upper casing member 20 in a posture extending substantially horizontally.

  As shown in FIG. 7, an air delivery duct portion 21a is formed on the left side wall portion of the lower casing 21 so as to protrude to the left side. The front end portion of the air delivery duct portion 21a is connected to the air conditioning unit. Inside the air delivery duct portion 21a, a lower partition member 28 extending in the left-right direction is provided at an intermediate portion in the up-down direction. The inside of the air delivery duct portion 21a is partitioned into an upper delivery passage 21b and a lower delivery passage 21c by a lower partition member 28.

  An upper fan case 29 and a lower fan case 30 are formed in the lower casing 21 so as to be aligned in the vertical direction. The fan motor 4 is disposed below the lower fan case 30. The fan motor 4 has a rotary shaft 4a extending in the vertical direction and a motor body 4b connected to the lower side of the rotary shaft 4a to drive the rotary shaft 4a. The motor main body 4b is fixed to a lower member 26 constituting a bottom wall portion (lower side) of the lower casing 21 by a fastening member or the like. The upper part of the rotating shaft 4 a extends upward so as to reach the upper fan case 29 through the lower fan case 30.

  The blower fan 3 includes an upper fan 3 a disposed in the upper fan case 29 and a lower fan 3 b disposed in the lower fan case 30. The upper fan 3 a and the lower fan 3 b are centrifugal fans (sirocco fans), and are arranged in a posture in which the rotation center line extends in the vertical direction and fixed to the rotation shaft 4 a of the fan motor 4. The outer diameter of the upper fan 3a is smaller than the outer diameter of the lower fan 3b.

  The lower wall portion of the upper fan case 29 is shared with the upper wall portion of the lower fan case 30, and the lower wall portion of the upper fan case 29 includes the inside of the upper fan case 29 and the lower fan case 30. A substantially circular communication hole 29b that communicates with the inside is formed. The rotation shaft 4a of the fan motor 4 passes through the communication hole 29b. The inner diameter of the communication hole 29b is set larger than the outer diameter of the upper fan 3a, and the upper fan 3a can be inserted into the communication hole 29b from below the communication hole 29b.

  A substantially circular upper bell mouth opening 29a is formed in the upper wall portion of the upper fan case 29 so as to open upward. The upper bell mouth opening 29a communicates with the left side of the upper partition member 27 on the downstream side of the air filter 5 in the air introduction passage 20c. The peripheral edge of the upper bell mouth opening 29a is curved so that the entire circumference is downward. When viewed from above, the upper bell mouth opening 29a and the communication hole 29b are disposed concentrically. The upper bell mouth opening 29a has a smaller diameter than the communication hole 29b.

  Inside the lower casing 21, an intermediate passage 21 d extending from the upper part to the lower part of the lower casing 21 is formed on the right side of the upper fan case 29 and the lower fan case 30. The upper portion of the intermediate passage 21d communicates with the right side portion of the upper partition member 27 on the downstream side of the air filter 5 of the air introduction passage 20c. The lower portion of the intermediate passage 21d is formed to extend along the bottom wall portion (lower wall portion) of the lower casing 21.

  The lower wall portion of the lower fan case 30 is formed away from the bottom wall portion of the lower casing 21, and is located between the lower wall portion of the lower fan case 30 and the bottom wall portion of the lower casing 21. The lower portion of the intermediate passage 21d is formed. A substantially circular lower bell mouth opening 30a is formed in the lower wall portion of the lower fan case 30 so as to open downward. The lower bell mouth opening 30a communicates with the lower portion of the intermediate passage 21d. The peripheral part of the lower bell mouth opening 30a is curved so that the entire circumference is upward. When viewed from above, the communication hole 29b and the lower bell mouth opening 30a are disposed concentrically. Further, the lower bell mouth opening 30a may have a larger diameter or the same diameter as the upper bell mouth opening 29a.

(Configuration of air passage opening / closing structure)
Next, the structure of the air passage opening / closing structure for opening and closing the air passage will be described. As shown in FIG. 6, the air passage opening / closing structure includes a left damper 40, a right damper 41, a shaft 42, a crank member 43, a link 44, and an actuator 45. The left damper 40 and the right damper 41 are rotary dampers made of a resin material, and are arranged coaxially with each other so as to rotate independently.

  The left damper 40 is disposed inside the left passage 20d that is on the left side of the upper partition member 27 of the air introduction passage 20c, and the left passage 20d communicates with the inside air introduction port 20b and the outside air introduction duct portion. This is for switching between the state communicated with 20a and the state communicated with both the inside air introduction port 20b and the outside air introduction duct portion 20a.

  The right damper 41 is disposed inside the right passage 20e that is on the right side of the upper partition member 27 of the air introduction passage 20c, and the right passage 20e communicates with the inside air introduction port 20b, and the outside air introduction duct portion. This is for switching between the state communicated with 20a and the state communicated with both the inside air introduction port 20b and the outside air introduction duct portion 20a.

  The right damper 41 includes a closing plate portion 41a and end plate portions 41b and 41b extending from both left and right edges of the closing plate portion 41a. The closing plate portion 41a is a portion for closing the right side of the inside air introduction port 20b from the upper side partition member 27 and closing the right side of the outside air introduction duct portion 20a from the upper side partition member 27. In this embodiment, It is substantially rectangular.

  The end plate portion 41b has a shape close to a triangle in a side view. A left support shaft portion 41c having a substantially circular cross section is provided at the end of the left end plate portion 41b so as to protrude to the left side. At the end of the right end plate portion 41b, a right support shaft portion 41d having a substantially circular cross section is provided so as to protrude rightward. The right support shaft portion 41d is inserted into a right bearing hole 20f formed so as to penetrate the right side wall portion of the upper casing member 20 in the left-right direction and is rotatably supported. The right support shaft portion 41d protrudes from the right wall portion of the upper casing member 20 to the right side.

  The left support shaft portion 41c of the right damper 41 is inserted into a bearing hole 27a formed in the upper partition member 27 so as to pass through the upper partition member 27 in the left-right direction and is rotatably supported. The left support shaft portion 41c protrudes from the upper partition member 27 to the left while being inserted into the bearing hole 27a. A fitting hole 41e is formed in the left support shaft portion 41c so as to open to the left end surface and extend rightward in the left support shaft portion 41c. The cross-sectional shape of the fitting hole 41e is a shape obtained by cutting out a part of a circle.

  The left damper 40 includes a closing plate portion 40a and end plate portions 40b and 40b extending from both left and right edges of the closing plate portion 40a. The closing plate portion 40a is a portion for closing the left side of the upper partition member 27 of the inside air introduction port 20b and for closing the left side of the upper partition member 27 of the outside air introduction duct portion 20a. It is substantially rectangular.

  The end plate portions 40b and 40b have a shape close to a triangle in a side view, like the right damper 41. A left support shaft portion 40c is provided at the end of the left end plate portion 40b so as to protrude to the left. A right cylindrical portion 40d is provided at the end of the right end plate portion 40b. The left support shaft portion 40c is inserted into a left bearing hole 20h formed so as to penetrate the left wall portion of the upper casing member 20 in the left-right direction, and is rotatably supported. The left support shaft portion 40 c protrudes from the left wall portion of the upper casing member 20 to the left side. The left support shaft portion 40c is a hollow shaft portion. A body shaft portion 42a of a shaft 42, which will be described later, can be inserted into the left support shaft portion 40c in the left-right direction. Further, a part of the outer peripheral surface of the left support shaft portion 40c in the circumferential direction is cut away.

  The right cylinder portion 40d extends in the left-right direction, and both left and right ends are open. A portion protruding leftward from the upper partition member 27 in the left support shaft portion 41c of the right damper 41 is inserted into the right cylinder portion 40d. The left support shaft portion 41c of the right damper 41 is rotatable while being inserted into the right cylinder portion 40d. That is, the right cylinder portion 40d is supported by the left support shaft portion 41c of the right damper 41 so that the right damper 41 and the left damper 40 can rotate relatively.

  The shaft 42 includes a main body shaft portion 42 a extending in the left-right direction and a power transmission portion 42 b provided at the left end portion of the main body shaft portion 42 a, and transmits the output (driving force) of the actuator 45 to the right damper 41. Is for. The left side of the main body shaft portion 42a is relatively rotatable while being inserted into the left side support shaft portion 40c of the left damper 40. Further, the intermediate portion of the main body shaft portion 42a is located in the left passage 20d and is disposed so as to cross the left passage 20d in the left-right direction.

  The main body shaft portion 42 a is formed so as to be inserted into the left support shaft portion 40 c of the left damper 40 and project from the left damper 40 to the right damper 41 side (right side). Specifically, the right end portion of the main body shaft portion 42 a is located on the right side of the bearing hole 27 a of the upper partition member 27, and a portion of the main body shaft portion 42 a that protrudes to the right damper 41 side is the right damper 41. The left support shaft 41c is coupled. That is, the right side of the main body shaft portion 42a is cut away, and the right side cross-sectional shape of the main body shaft portion 42a is substantially coincident with the cross-sectional shape of the fitting hole 41e of the left support shaft portion 41c of the right damper 41. It has become. The notched portion on the right side of the main body shaft portion 42a is fitted into the inner surface of the fitting hole 41e while being inserted into the fitting hole 41e of the left support shaft portion 41c of the right damper 41, and is rotated relatively. It does not move.

  The power transmission part 42b is a part for transmitting a driving force to the main body shaft part 42a, and is formed so as to protrude in the radial direction from the outer peripheral surface of the main body shaft part 42a. The power transmission portion 42b and the main body shaft portion 42a are integrally formed of a resin material. A pin (not shown) protruding leftward is formed on the distal end side of the power transmission portion 42b.

  The crank member 43 is formed with a connection hole 43a into which the left support shaft portion 40c of the left damper 40 can be inserted. The connection hole 43a is formed so as to be fitted to the outer peripheral surface of the left support shaft portion 40c of the left damper 40. That is, the shape of the inner peripheral surface of the connecting hole 43a is formed so as to substantially coincide with the shape of the outer peripheral surface of the notched portion of the left support shaft portion 40c. The crank member 43 and the left support shaft portion 40c are integrated with each other so that the left support shaft portion 40c does not rotate relatively by inserting the notched portion of the left support shaft portion 40c into the connecting hole 43a. Further, the crank member 43 is formed with a pin (not shown) that protrudes to the left side at a portion radially away from the connecting hole 43a.

  As shown in FIG. 6, the link 44 is made of a plate-like member, and a substantially central portion thereof is rotatably attached to the left side wall portion of the left side member 22 of the upper casing member 20. In the link 44, a first groove (not shown) into which the pin of the power transmission part 42b is inserted and a second groove (not shown) into which the pin of the crank member 43 is inserted are in the rotation direction of the link 44. It is formed to extend. By rotating the link 44, the rotational force around the center line is applied to the pin of the power transmission part 42b inserted into the first groove and the pin of the crank member 43 inserted into the second groove at a predetermined timing. It is comprised so that it may act. The structure of the link 44 is conventionally known.

  The actuator 45 is fixed to the left wall portion of the left member 22 of the casing member 20. The output shaft of the actuator 45 is coupled to the link 44, and the output of the actuator 45 acts on the link 44 in the rotation direction of the link 44. The actuator 45 is conventionally well-known and is controlled by an air conditioning control unit (not shown).

(Fan motor structure)
The fan motor 4 is controlled by an air conditioning control unit. As shown in FIG. 7, the upper side of the rotation shaft 4 a of the fan motor 4 is fixed in a state where it is press-fitted into a hole (not shown) formed on the rotation center line of the fan 3. The rotating shaft 4a extends downward from the lower end of the fan 3, and the lower side of the rotating shaft 4a is connected to the motor body 4b.

  On the upper side of the motor body 4b, a cooling air discharge port 4c for discharging cooling air from the inside of the motor body 4b is opened upward. A rotation shaft 4a is disposed at the center of the cooling air discharge port 4c, and cooling air flows between the peripheral edge of the cooling air discharge port 4c and the outer peripheral surface of the rotation shaft 4a.

  Between the fan 3 and the motor main body 4b on the rotating shaft 4a, a water intrusion prevention cover 60 made of resin is provided to prevent the water that has entered from the outside of the passenger compartment from entering the motor main body 4b. . The water intrusion prevention cover 60 is a member constituting the blower 1. In FIG. 6, the water intrusion prevention cover 60 is omitted.

  The water intrusion prevention cover 60 is provided so as to extend in the radial direction of the rotating shaft 4a. A press-fitting hole 60a into which the rotary shaft 4a is press-fitted is formed at the center of the water-ingress prevention cover 60. The water-intrusion prevention cover 60 has the rotary shaft 4a pressed into the press-fitting hole 60a. It is fixed so that it cannot rotate relative to 4a. The water intrusion prevention cover 60 has a circular plate portion 60b and an inclined plate portion 60c that extends while descending from the peripheral edge of the circular plate portion 60b, and the circular plate portion 60b and the inclined plate portion 60c are integrally formed. Has been. The inclined plate portion 60c is provided over the entire periphery of the peripheral portion of the circular plate portion 60b. When the water intrusion prevention cover 60 is fixed to the rotating shaft 4a, it is only necessary to press-fit the rotating shaft 4a into the press-fitting hole 60a, and the fixing structure is simplified.

  In a state where the water intrusion prevention cover 60 is fixed to the rotating shaft 4a, the water intrusion prevention cover 60 is formed so that a clearance for cooling air discharge is formed between the lower surface of the water ingress prevention cover 60 and the motor body 4b. The height is set. The water intrusion prevention cover 60 is formed to extend outward from the cooling air outlet 4c in the radial direction of the rotating shaft 4a. Further, the peripheral edge portion of the water intrusion prevention cover 60 is positioned below the cooling air discharge port 4c.

(Blower operation)
Next, operation | movement of the air blower 1 comprised as mentioned above is demonstrated. This blower 1 is an arbitrary one of three modes including an outside air introduction mode for introducing only outside air, an inside air introduction mode for introducing only inside air, and an inside / outside air two-layer flow mode for introducing both outside air and inside air. You can switch between two modes. The mode switching is automatically performed by the air conditioning control unit according to the air conditioning conditions, for example, but may be manually operable.

  When the mode is switched, the left support shaft portion 41c of the right damper 41 is relatively rotatable while being inserted into the right cylinder portion 40d of the left damper 40, so that the right damper 41 and the left damper 40 Can be rotated at different timings, and the amount of rotation can be individually set. This is made possible by setting the shapes of the first groove and the second groove of the link 44.

  When the air conditioning control unit selects the outside air introduction mode, the actuator 45 is operated to rotate both the left damper 40 and the right damper 41 to the rear side, and the inside air inlet 20b is fully closed. That is, when the crank member 43 is rotated rearward about the center line, the left damper 40 is moved to the rear side around the center line with respect to the left damper 40 to which the crank member 43 is attached. It turns to the rear side. Further, when the power transmission portion 42b of the shaft 42 is rotated rearward around the center line, the rotational force acts rearward around the center line with respect to the right damper 41 to which the shaft 42 is coupled. The damper 41 rotates to the rear side.

  When the fan motor 4 operates and the rotating shaft 4a rotates with the outside air introduction mode selected, the upper fan 3a and the lower fan 3b rotate, and the outside air is sucked from the outside air introduction duct portion 20a. After the outside air sucked into the outside air introduction duct portion 20a is filtered through the air filter 5 as air-conditioning air, the air that has flowed through the left passage 20d on the left side of the upper partition member 27 passes through the upper bell mouth opening 29a. The air is sucked into the upper fan case 29 and sent from the upper delivery passage 21b to the air conditioning unit.

  Further, the air flowing through the right passage 20e on the right side of the upper partition member 27 flows through the intermediate passage 21d downward and is sucked into the lower fan case 30 from the lower bell mouth opening 30a. The air for air conditioning sucked into the lower fan case 30 is sent to the air conditioning unit from the lower delivery passage 21c.

  On the other hand, when the air conditioning control unit selects the inside air introduction mode, the actuator 45 is operated to rotate both the left damper 40 and the right damper 41 to the front side, and the outside air introduction duct portion 20a is fully closed. That is, the crank member 43 is rotated to the front around the center line, the left damper 40 is rotated to the front, and the power transmission portion 42b of the shaft 42 is rotated to the front around the center line to thereby adjust the right damper 41. Turn to the front.

  When the fan motor 4 operates in a state where the inside air introduction mode is selected, the inside air is sucked from the inside air introduction port 20b. After the inside air sucked from the inside air introduction port 20b passes through the air filter 5 as air-conditioning air and is filtered, the air that has circulated through the left side passage 20d on the left side of the upper partition member 27 passes through the upper bell mouth opening 29a. The air is sucked into the fan case 29 and sent to the air conditioning unit from the upper delivery passage 21b. Further, the air that has flowed through the right passage 20e on the right side of the upper partition member 27 flows through the intermediate passage 21d, is sucked into the lower fan case 30 from the lower bell mouth opening 30a, and is air-conditioned from the lower delivery passage 21c. Sent to the unit.

  When the air-conditioning control unit selects the inside / outside air two-layer flow mode, the actuator 45 is operated to rotate the left damper 40 to the rear side to fully close the inside air introduction port 20b, and to rotate the right damper 41 to the front side. Thus, the outside air introduction duct portion 20a is fully closed. That is, the crank member 43 is rotated to the front around the center line, the left damper 40 is rotated to the front, and the power transmission portion 42b of the shaft 42 is rotated to the front around the center line to thereby adjust the right damper 41. Turn to the front. Thereby, the inside air introduction port 20b and the outside air introduction duct portion 20a are opened. The outside air sucked into the outside air introduction duct portion 20a is filtered through the air filter 5 as air-conditioning air, and then circulates through the left passage 20d on the left side of the upper partition member 27 so that the upper bell mouth opening 29a. The air is sucked into the upper fan case 29 and sent from the upper delivery passage 21b to the air conditioning unit. The inside air sucked from the inside air introduction port 20b is filtered through the air filter 5 as air-conditioning air, and then circulates through the right side passage 20e and the intermediate passage 21d on the right side of the upper partition member 27 to lower the lower bell. The air is sucked into the lower fan case 30 from the mouse opening 30a and sent to the air conditioning unit from the lower delivery passage 21c.

(Effect of embodiment)
According to the blower 1 according to this embodiment, the opening of the outside air introduction duct portion 20a is opened in the outside air introduction mode and the inside / outside air two-layer flow mode, so that rainwater, water at the time of car washing, and the like are outside air introduction duct portion 20a. May enter the inside of the blower casing 2 and flow downward. The rainwater or the like reaches the inside of the lower fan case 30 through the upper bell mouth opening 29 a and the communication hole 29 b of the upper fan case 29, and passes from the lower bell mouth opening 30 a of the lower fan case 30 to the fan motor 4. There is a risk of flowing towards.

  In this embodiment, the water intrusion prevention cover 60 is provided between the fan 3 and the motor body 4b on the rotation shaft 4a of the fan motor 4 so as to extend in the radial direction of the rotation shaft 4a. Rainwater or the like that has flowed toward the water is prevented from flowing downward by the water intrusion prevention cover 60. This prevents rainwater or the like from entering the motor body 4b without providing a waterproof structure in the fan motor 4 itself. Further, since a clearance for discharging cooling air is formed between the water intrusion prevention cover 60 and the motor main body 4b, the cooling air can be discharged from the motor main body 4b by this clearance.

  Further, since the water intrusion prevention cover 60 extends outward from the cooling air outlet 4c of the motor main body 4b, rainwater or the like adheres to the upper surface of the water ingress prevention cover 60 and starts from the periphery of the water ingress prevention cover 60. When it flows downward, it can flow outward from the cooling air outlet 4c. This prevents the rainwater or the like from entering the cooling air outlet 4c.

  As in Modification 1 of the embodiment shown in FIGS. 8 and 9, a peripheral wall portion 4d that extends upward and surrounds the rotating shaft 4a is provided around the cooling air discharge port 4c on the upper side of the motor body 4b. It may be formed. The upper end portion of the peripheral wall portion 4d is located above the peripheral edge portion of the inclined plate portion 60c of the water intrusion prevention cover 60. Further, a clearance for discharging cooling air is formed between the peripheral wall portion 4 d and the peripheral edge portion of the inclined plate portion 60 c of the water intrusion prevention cover 60. As shown in FIG. 9, the peripheral wall 4d is discontinuous in the circumferential direction of the rotating shaft 4a. That is, the peripheral wall portion 4d is provided with a plurality of slits 4e extending from the upper end portion to the lower end portion of the peripheral wall portion 4d at intervals in the circumferential direction. Cooling air can be discharged from the slit 4e. Further, when rainwater or the like is rolled up from the lower side to the upper side than the cooling air discharge port 4c by the flow of the wind in the blower casing 2, a peripheral wall portion 4d is formed around the cooling air discharge port 4c. Therefore, the peripheral wall portion 4d prevents the rainwater and the like that has rolled up from entering the cooling air discharge port 4c. The number of slits 4e may be one or two, or four or more. Moreover, the slit 4e does not need to be provided, and in this case, the peripheral wall portion 4d is continuous in the circumferential direction.

  Moreover, you may provide many blade | wings 70c in the water intrusion prevention cover 70 like the modification 2 of embodiment shown in FIG.10 and FIG.11. A press-fit hole 70a into which the rotary shaft 4a is press-fit is also formed in the water intrusion prevention cover 70 of the second modification. The water intrusion prevention cover 70 has a circular plate portion 70b extending in the radial direction of the rotary shaft 4a, and a large number of blades 70c are arranged in the circumferential direction on the upper surface of the circular plate portion 70b. Yes. The blades 70 c have a shape that forms an air flow from the radially inner side to the outer side by the rotation of the water intrusion prevention cover 70. As a result, rainwater or the like is blown outward, making it difficult to enter the motor body 4b.

  In the above embodiment, the two dampers are arranged in the left-right direction. However, the present invention is not limited to this, and for example, the dampers may be arranged in the front-rear direction. The present invention can also be applied to a blower for an air conditioning unit that does not have an internal / external air two-layer flow mode.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  As described above, the blower of the vehicle air conditioner according to the present invention can be mounted on, for example, an automobile.

DESCRIPTION OF SYMBOLS 1 Blower 2 Blower casing 3 Fan 4 Fan motor 4a Rotating shaft 4b Motor main body 4c Cooling air discharge port 4d Perimeter wall part 60 Water intrusion prevention cover 60a Press-in hole

Claims (6)

In a blower of a vehicle air conditioner that sucks air outside the passenger compartment and air inside the passenger compartment and blows it to the air conditioning unit.
A blower casing formed with an air passage communicating with the outside of the passenger compartment;
A fan arranged in a posture in which the rotation center line extends in the vertical direction in the air passage;
A fan having a rotating shaft fixed to the fan and extending downward from the fan, and a motor body fixed to the lower side of the blower casing and connected to the lower side of the rotating shaft to drive the rotating shaft. A motor,
Water intrusion prevention provided between the fan and the motor main body of the rotating shaft so as to extend in the radial direction of the rotating shaft, and prevents water that has entered from the outside of the passenger compartment from entering the inside of the motor main body. With a cover,
A blower of a vehicle air conditioner, wherein a gap is formed between the water intrusion prevention cover and the motor body. In the air blower of the vehicle air conditioner according to claim 1,
The water intrusion prevention cover is formed with a press-fitting hole into which the rotating shaft is press-fitted,
The blower of a vehicle air conditioner, wherein the water intrusion prevention cover is fixed to the rotary shaft in a state where the rotary shaft is press-fitted into the press-fitting hole. The blower of the vehicle air conditioner according to claim 1 or 2,
On the upper side of the motor body, there is a cooling air outlet,
The blower of a vehicle air conditioner, wherein the water intrusion prevention cover is formed to extend outward from the peripheral edge of the cooling air discharge port in the radial direction of the rotating shaft. In the air blower of the vehicle air conditioner according to claim 3,
An air blower of a vehicle air conditioner, wherein a peripheral edge portion of the water intrusion prevention cover is positioned below the cooling air discharge port. The blower of the vehicle air conditioner according to claim 3 or 4,
A blower of a vehicle air conditioner, wherein a peripheral wall portion extending upward and surrounding the rotating shaft is formed around the cooling air discharge port on the upper side of the motor body. The blower of the vehicle air conditioner according to claim 5,
The blower of a vehicle air conditioner, wherein the peripheral wall portion is discontinuous in the circumferential direction of the rotating shaft.

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