JP2007001541A - Air blower and air conditioner for vehicle provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air blower preventing a moisture content included in cooling air from entering a motor, and provide an air conditioner for a vehicle provided with the air blower. <P>SOLUTION: The air blower 3 is provided with an air blowing fan 34 arranged at an inner side of a scroll casing part 36 of a fan casing 30 and communicating a suction port 31 with a delivery port 32 to form an air stream in the fan casing 30; an air taking-in port 38 provided on a nose part side wall 37 formed at a downstream side than the scroll casing part 36 in order to take-in part of the air fed from the air blowing fan 34; a chamber 39 communicated with the air taking-in port 38 and formed at the outside of the scroll casing part 36; a cooling air port 40 opened to a position at a lower side in a gravity direction than the air taking-in port 38 in the chamber 39; and a water prevention wall 41 arranged in the chamber 39 and interposed in a route from the air taking-in port 38 to the cooling air port 40. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a blower device having a mechanism for taking in cooling air and cooling a motor.

Conventionally, as this type of blower, one that takes in a part of the blown air as cooling air from an air inlet provided near the discharge port of the fan casing surrounding the blower fan and guides it to the motor side to cool the motor is known. (For example, refer to Patent Document 1).
Japanese Patent No. 2755317 (see FIGS. 1 and 3)

  In the blower described in Patent Document 1, water taken into the fan casing is guided into the motor from the wind pressure of the blower fan as a measure for preventing the water contained in the blown air from flowing into the motor. Protrusions are provided to prevent However, in the case where water is contained in the cooling air taken from the air intake provided near the discharge port of the fan casing, there is no configuration for removing this moisture before reaching the motor.

  Accordingly, an object of the present invention has been made in view of the above problems, and a blower device that prevents water contained in the air taken in for cooling the motor from entering the motor. And it is providing the vehicle air conditioner provided with this.

  In order to achieve the above object, the following technical means are adopted. That is, the invention of the blower device according to claim 1 is provided inside the fan casing (30) having the suction port (31) and the discharge port (32) and the scroll casing portion (36) of the fan casing (30). A blower fan (34) that is disposed and forms an airflow from the suction port (31) to the discharge port (32), a motor (35) that drives the blower fan (34), and the blower fan (34) In order to take in a part of the air sent into the fan casing (30), the nose part side wall (37) formed downstream of the scroll casing part (36) of the fan casing (30) is provided. An air inlet (38) formed, and a chamber (39) formed outside the scroll casing portion (36) in communication with the air inlet (38). An air intake opening that opens in the chamber (39) at a position lower than the air intake opening (38) in the direction of gravity and communicates with the air intake opening (38) to cool the motor (35). A cooling air port (40), and a waterproof wall (41) disposed in the chamber (39) and interposed in a path from the air intake port (38) to the cooling air port (40). It is characterized by that.

  According to the first aspect of the present invention, even when the air taken into the chamber for cooling the motor contains water, the water in the air collides with the waterproof wall. As a result, it adheres to the side surface of the waterproof wall, and only the air excluding the adhering water is taken into the cooling air port to cool the motor. Thereby, the water inside a motor can be prevented.

  According to a second aspect of the present invention, in the blower according to the first aspect, the waterproof wall (43) includes a base portion (42) and a base portion (42) extending from the base portion (42) in the chamber (39). It has an end portion (44), and the other end portion (44) is located closer to the cooling air port (40) than the base portion (42).

  According to the invention of claim 2, the curved other end portion and the inclined other end portion of the waterproof wall have a function of acting as a barrier against an airflow including water sucked into the cooling air port. It is possible to improve the blocking effect of water intrusion into the cooling air port.

  According to a third aspect of the present invention, in the blower device according to the first aspect, the waterproof wall (45) extends from the base (46) and the base (46) in the chamber (39). It has an other end part (47), and the other end part (47) is located near the air intake (38) with respect to the base part (46).

  According to the third aspect of the invention, the curved other end and the other inclined end of the waterproof wall act as a barrier against the airflow formed from the air intake toward the cooling air outlet. Therefore, the effect of blocking water from entering the cooling air port can be improved.

  According to a fourth aspect of the present invention, in the blower device according to any one of the first to third aspects, the cooling air port (40) opens at a position above the bottom surface (28) of the chamber (39). It is characterized by being.

  According to the fourth aspect of the present invention, the space from the bottom surface of the chamber to the height of the opening surface of the cooling air port becomes a water storage space, so that it is contained in the air taken into the chamber for cooling the motor. The water to be stored can be stored in the water storage space, and the stored water can be dried over time. With this configuration, the drainage mechanism provided in the blower can be omitted or simplified.

  Invention of the vehicle air conditioner of Claim 5 takes in external air or inside air, and blows in the air-conditioning duct (1), The air blower (3) in any one of Claims 1-4, and the said air blower The evaporator (6) for cooling the air blown from (3), the heater unit (8) for heating the air blown from the blower (3), the evaporator (6) and / or the heater unit (8) It has the air outlet (17, 18) which blows off the air conditioned by the inside of a vehicle, It is characterized by the above-mentioned.

  According to the fifth aspect of the present invention, a vehicle air conditioner capable of reducing the intrusion of water into the motor driving the blower and preventing the blower from malfunctioning is obtained.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
The blower of the present invention is a blower having a configuration in which a part of blown air is taken in through a chamber provided in the vicinity of the fan casing and blown to the motor side in order to cool the motor. As an apparatus, an air blower that sends conditioned air toward the passenger compartment in a vehicle air conditioner will be described as an example.

  Below, 1st Embodiment is described using FIGS. 1-4. FIG. 1 is a schematic diagram illustrating a configuration of a vehicle air conditioner including a blower according to the present embodiment.

  First, main components of the vehicle air conditioner provided with the air blower 3 according to the present embodiment are an air conditioner duct 1 for introducing air into the vehicle 23 interior, and an air blower as air blowing means for sending air into the air conditioner duct 1. The device 3, the refrigeration cycle 20, the hot water circuit 22, and the air conditioner control device 13.

  The air-conditioning duct 1 includes branch ducts 1a and 1b at its downstream end, the branch duct 1a communicates with an outlet 17 that opens into the vehicle 23 room, and the branch duct 1b opens into the vehicle 23 room. It communicates with the outlet 18.

  In face mode, a face mode blowout flow is blown out from the blowout port 17 at the front of the vehicle 23 toward the upper body of the occupant. In foot mode, a foot mode blowout flow is blown out from the blowout port 18 toward the occupant's feet. In the level mode, the face mode blowout flow and the foot mode blowout flow are blown out simultaneously, and the blowout mode switching dampers 15a and 15b can respectively switch the blowout mode.

  The blower 3 includes a motor 35, a centrifugal blower fan 34, and a fan casing 30. An inside / outside air intake switching box 2 is provided on the upstream side of the fan casing 30, and the inside / outside air intake switching box 2 is provided in the inside of the vehicle 23 to take in the air in the vehicle compartment 23, that is, inside air. An inside air suction port communicating with the intake port 26 and an outside air suction port communicating with the outside air intake port 29 provided in the vehicle 23 room for taking in air outside the vehicle compartment 23, that is, outside air, are formed. Also, inside / outside air intake switching box 2, the inside / outside air switching door 16 can selectively open and close the inside air suction port and the outside air suction port, and the air volume ratio for taking in outside air and inside air can be adjusted. Is provided. When the outside air temperature outside the vehicle 23 is measured by the inside / outside air detection sensor 9, the inside / outside air switching door 16 is opened so as to shield the inside air inlet, and the outside air temperature is detected in a state where the intrusion of the inside air is blocked. is there.

  The refrigeration cycle 20 functions as a cooling means, and is driven by a traveling engine of the vehicle 23 via the electromagnetic clutch 7, and refrigerant condensation that condenses and liquefies high-temperature and high-pressure refrigerant compressed by the compressor 24. 27, a receiver 4 that temporarily stores the refrigerant condensed in the refrigerant condenser 27 and flows only the liquid refrigerant, an expansion valve 5 that decompresses and expands the liquid refrigerant guided from the receiver 4, and an air conditioning duct 1 An evaporator 6 that is provided and evaporates the low-temperature and low-pressure refrigerant that has been decompressed by the expansion valve 5 by receiving air from the blower 3, and a refrigerant pressure that is provided between the receiver 4 and the expansion valve 5 and detects the pressure of the refrigerant. The refrigerant pressure detector 12 is a detection means, and is connected to each other through a refrigerant pipe 19. The electromagnetic clutch 7 that operates the compressor 24 is ON / OFF controlled based on an ON / OFF signal output from the air conditioner control device 13.

  The heating cycle 22 is provided on the downstream side of the evaporator 6 in the air conditioning duct 1, and the heater core 8 that heats the air flowing in the air conditioning duct 1 using the cooling water of the traveling engine as a heat source, and the heater core 8 as the traveling engine. A cooling water circuit (not shown) and a hot water pipe 21 connected in a ring shape. An air mix door 14 that adjusts the ratio of the amount of air passing through the heater core 8 and the amount of air bypassing the heater core 8 is disposed downstream of the evaporator 6 and upstream of the heater core 8.

  The air conditioner control device 13 has a built-in microcomputer (not shown) in which a control program, an arithmetic expression, etc. relating to air conditioning control are stored. Based on the signals output from the sensor 9, the solar radiation sensor 11, the post-evaporator sensor 10, the refrigerant pressure detector 12, and the engine water temperature sensor, the electromagnetic clutch 7, the outlet switching doors 15a and 15b, the inside / outside air switching door 16 The air mix door 14 and the motor 35 are controlled. The air conditioner operation panel is provided with a temperature setting volume that is a temperature setting means for the passenger to set the room temperature, and a display unit that displays the set temperature and air volume.

  Next, the internal configuration of the fan casing 30 according to the blower 3 will be described. FIG. 2 is a schematic view in plan view showing the internal configuration of the fan casing 30 in the present embodiment, and for the sake of convenience, the waterproof wall 43 is not shown. FIG. 3 is an internal configuration diagram in a side view showing the air blower in the present embodiment.

  As shown in FIGS. 2 and 3, the main configuration of the blower 3 is arranged inside the fan casing 30 having the suction port 31 and the discharge port 32 and the scroll casing portion 36 of the fan casing 30, and the suction port 31. And a blower fan 34 that communicates with the discharge port 32 to form an air flow in the fan casing 30 and a motor 35 that drives the blower fan 34. Further, the air sent into the fan casing 30 by the blower fan 34. In order to incorporate a part of the air intake port 38, an air intake port 38 provided on a side wall 37 of the nose portion formed on the downstream side of the scroll casing portion 36 and the air intake port 38 communicate with the outside of the scroll casing portion 36. The formed chamber 39 and an opening in the gravity direction lower than the air intake port 38 in the chamber 39, A cooling air port 40 that communicates with the air intake port 38 and serves as an air intake port for cooling the motor 35, and a waterproof wall disposed in the chamber 39 and interposed in a path from the air intake port 38 to the cooling air port 40. 41.

  Below, the detailed structure of the air blower 3 is demonstrated. The fan casing 30 includes a suction port 31 of a blower fan 34 provided at an upper portion, a scroll-shaped scroll casing portion 36 surrounding the blower fan 34 provided below the suction port 31, and a downstream side of the scroll casing portion 36. And a nose portion that forms a flow path that protrudes laterally, and a discharge port 32 of the fan casing 30 is formed at an end of the nose portion. The blower fan 34 is a centrifugal fan, and applies dynamic pressure to the air using a difference in centrifugal force between an inlet and an outlet of a blade provided on the outer periphery of the fan. Such a centrifugal fan corresponds to, for example, a sirocco fan having a forward blade or a turbo fan having a rear blade.

  The inner diameter of the suction port 31 is formed smaller than the outer diameter of the blower fan 34, and the suction port of the blower fan 34 is positioned substantially parallel to the suction port 31. A bell mouth shape, which is a part of the fan casing 30, is formed around the suction port 31. The inside air or outside air is sucked into the suction port 31 by the blower fan 34 that is rotated by the driving force of the motor 35, discharged in the centrifugal direction of the blower fan 34, rectified in the scroll casing portion 36, and sent out from the discharge port 32. The air is sent to the evaporator 6.

  The function of the scroll casing part 36 is to rectify the flow of air radiated from the blower fan 34 in the centrifugal direction and collect it in one direction, and efficiently convert the power obtained by the blower fan 34 into static pressure. . The shape of the inner peripheral surface of the scroll casing portion 36 is a logarithmic spiral, and the interval between the blower fan 36 and the inner peripheral surface of the scroll casing portion 36 is configured to gradually increase in the rotational direction of the fan.

  The chamber 39 is outside the scroll casing portion 36 and has a side surface formed by the nose portion, which is a flow path through which air rectified in the scroll casing portion 36 is blown in one direction, and the scroll casing portion 36. It is arranged to be sandwiched. A nose portion side wall 37 is formed inside the flow path formed by the nose portion, and an air intake port 38 communicating with the chamber 39 is opened at a part thereof. In the chamber 38, a cooling air port 40 opened upward is provided near the bottom surface. A cooling air passage 48 is formed further downward from the cooling air port 40 communicating with the air intake port 38, and the cooling air passage 48 communicates with the lower portion or the periphery of the motor 35. The opening position of the cooling air port 40 is above the bottom surface of the chamber 39.

  In the vicinity of the cooling air port 40, a waterproof wall 43 extends so as to stand up in the chamber 39. The waterproof wall 43 has a base portion 42 in the chamber 39, and extends upward from the base portion 42 so as to have a second end portion 44 that is curved or inclined toward the cooling air port 40 with respect to the base portion 42. is there. The degree of curvature or inclination of the other end 44 of the waterproof wall 43 is not limited to a certain range, and the positional relationship is such that the position of the other end 44 exists closer to the cooling air port 40 with respect to the vertical direction. If it is.

  FIG. 4 is a partial configuration diagram in plan view showing the configuration in the chamber of the blower 3 shown in FIG. 3. As shown in FIG. 4, when viewed in plan, the waterproof wall 43 is connected to the cooling air port 40. The other end portion 44 that substantially covers the entire opening is curved or inclined. Alternatively, the other end 44 may be curved or inclined so that the projected area of the waterproof wall 43 is substantially equal to the opening area of the cooling air port 40 when viewed in plan.

  In the above configuration, when the air blower 3 is operated, the outside air or the inside air is sucked in from the suction port 31, discharged in the centrifugal direction by the blower fan 34 and rectified, and then blown to the flow path of the nose portion and blown. A part of the air is taken in from the air intake 38 and is stored in the chamber 39. The air once accumulated in the chamber 39 is disposed substantially diagonally downward with respect to the air intake port 38 opened upward in the chamber 39, and is slanted toward the cooling air port 40 opened upward. It flows so as to form a downward airflow. The air forming this air current collides with the waterproof wall 43 provided so as to cover the cooling air port 40, and the moisture contained in the air is cooled and adheres to the surface of the waterproof wall 43. The adhering moisture is further combined with the adhering moisture by the colliding air to form water droplets, and flows down along the surface of the waterproof wall 43. The dropped water droplets accumulate on the bottom surface of the chamber 39 and are stored. When the dry air is supplied into the fan casing 30, the same dry air is also supplied into the chamber 39, and the stored water is dried and evaporated by this air. Even if the situation where the dry air is not supplied into the fan casing 30 continues for a long time, the opening surface of the cooling air port 40 is provided at a position higher than the bottom surface of the chamber 39. The volume of the stored water space can store water droplets.

  The air from which moisture in the air has been removed in this way flows around the waterproof wall 43 and flows into the cooling air port 40. Then, the motor 35 is cooled through the cooling air passage 48 that leads from the cooling air port 40 to the lower part or the periphery of the motor 35. The air flowing through the cooling air passage 48 is discharged to the outside after the motor 35 is cooled.

  As described above, according to the blower device 3 of the present embodiment, the motor 35 is driven to communicate with the suction port 31 and the discharge port 32 to form an air flow in the fan casing 30, and the blower fan 34 is used as a fan. In order to take in a part of the air sent into the casing 30, an air intake port 38 provided in a nose portion side wall 37 formed on the downstream side of the scroll casing portion 36 of the fan casing 30, and the air intake port A chamber 39 formed outside the scroll casing portion 36 in communication with the valve 38, and opened in a lower position in the gravity direction than the air intake port 38 in the chamber 39. The motor 35 communicates with the air intake port 38. A cooling air port 40 serving as an intake port for cooling air is disposed in the chamber 39, and reaches the cooling air port 40 from the air intake port 38. With the structure including the waterproof wall 43 interposed in the path, the water in the air taken into the chamber 39 for cooling the motor 35 is caused by the collision of the air with the waterproof wall 43. Since it adheres to the side surface of the waterproof wall 43, only the air from which the adhering water has been removed is taken into the cooling air port 40, so that the water inside the motor 35 can be prevented.

  The waterproof wall 43 has a base 42 in the chamber 39 and another end 44 extending from the base 42, and the other end 44 is located closer to the cooling air port 40 with respect to the base 42. In the case of the configuration, the other end 44 of the waterproof wall 43 functions as a barrier against the airflow including the water sucked into the cooling air port 40, so that the water into the cooling air port 40 is The intrusion blocking effect can be improved.

  In addition, the waterproof wall 43 extends from the base portion 42 provided in the chamber 39 and has the other end portion 44 that is curved or inclined toward the cooling air port 40 with respect to the base portion 42. The other end 44 acts as a barrier against the airflow including water sucked into the cooling air port, and a certain amount of water adhering to the other end is accumulated and then becomes a lump. Since it flows down along the shape, the flow down to the bottom surface of the chamber 39 can be promoted.

  When the cooling air port 40 is opened at a position above the bottom surface 28 of the chamber 39, the vertical direction from the bottom surface 28 of the chamber 39 to the height of the opening surface of the cooling air port 40. , The water contained in the air taken into the chamber 39 for cooling the motor 35 can be stored in the water storage space, and the stored water can be supplied by the subsequent ventilation or It can be dried over time.

  Moreover, according to the vehicle air conditioner of this embodiment, the air blower 3, the evaporator 6 that cools the air blown from the blower 3, the heater unit 8 that heats the air blown from the blower 3, In addition, since the air outlets 17 and 18 for blowing the air conditioned by the evaporator 6 and / or the heater unit 8 into the vehicle are provided, water intrusion into the motor 35 driving the blower 3 is reduced. Thus, a vehicle air conditioner that can prevent the blower from malfunctioning is obtained.

(Second Embodiment)
Below, the air blower in this embodiment is demonstrated. The air blower of this embodiment differs from the first embodiment only in the waterproof wall 41, and the other configurations are the same as those of the first embodiment, and the description thereof is omitted. FIG. 5 is a partial side configuration diagram showing the configuration in the chamber of the blower in the present embodiment.

  As shown in FIG. 5, a waterproof wall 41 extends from the bottom surface 28 of the chamber 39 in the vicinity of the cooling air port 40. The waterproof wall 41 has a base portion 41 a in the chamber 39 and a shape having the other end portion 41 b extending substantially upward from the base portion 41 a. The waterproof wall 41 has a vertical length from the opening surface of the cooling air port 40 to a part of the opening of the air intake port 38.

  6 is a partial configuration diagram in plan view showing the configuration in the chamber 39 in the blower shown in FIG. 5. As shown in FIG. 6, the width dimension of the waterproof wall 41 when viewed in plan is the cooling air. The opening width in the longitudinal direction of the mouth 40 is substantially the same. Further, the position of the waterproof wall 41 may be approximately between the cooling air port 40 and the air intake port 38, or may be on the side close to either the cooling air port 40 or the air intake port 38.

  In the above configuration, when the air blower is operated, the outside air or the inside air is sucked in from the suction port 31, discharged in the centrifugal direction by the blower fan 34 and rectified, and then blown to the flow path of the nose portion. A part of the air is taken in from the air intake 38 and accumulated in the chamber 39. The air once accumulated in the chamber 39 is disposed substantially diagonally downward with respect to the air intake port 38 opened upward in the chamber 39, and is inclined obliquely toward the cooling air port 40 opened upward. It flows so as to form a downward airflow. Then, the air forming this air current collides with the waterproof wall 41, is cooled, and moisture contained in the air adheres to the surface of the waterproof wall 41. The adhering moisture is further combined with the adhering moisture by the colliding air to form water droplets, and flows down along the surface of the waterproof wall 41. The dropped water droplets accumulate on the bottom surface of the chamber 39 and are stored. When the dry air is supplied into the fan casing 30, the same dry air is also supplied into the chamber 39, and the stored water is dried and evaporated by this air. Even if the situation where the dry air is not supplied into the fan casing 30 continues for a long time, the opening surface of the cooling air port 40 is provided at a position higher than the bottom surface of the chamber 39. The volume of the stored water space can store water droplets.

  The air from which moisture in the air has been removed in this way flows around the waterproof wall 41 and flows into the cooling air port 40. Then, the motor 35 is cooled through the cooling air passage 48 that leads from the cooling air port 40 to the lower part or the periphery of the motor 35. The air flowing through the cooling air passage 48 is discharged to the outside after the motor 35 is cooled.

  As described above, according to the air blower of the present embodiment, the waterproof wall 41 is disposed in the chamber 39 and interposed in the path from the air intake port 38 to the cooling air port 40. Since the water in the air taken into the chamber 39 for cooling the air adheres to the side surface of the waterproof wall 41 when the air collides with the waterproof wall 41, only the air from which the attached water is removed Is taken into the cooling air port 40, so that the water inside the motor 35 can be prevented.

  Further, when the waterproof wall 41 has a vertical length from the opening surface of the cooling air port 40 to a part of the opening of the air intake port 38, the range in which the cooling air can collide with the waterproof wall 41. Becomes larger and more water can be collected.

  Further, when the width of the waterproof wall 41 in the lateral direction is equal to or greater than the width of the cooling air port 40 in the longitudinal direction, the range in which the cooling air can collide with the waterproof wall 41 is increased, and more moisture is collected. It becomes possible to do.

  Further, since the waterproof wall 41 is disposed closer to the air intake 38 than the cooling air port 40, the cooling air collides with the waterproof wall 41 at a location closer to the air intake 38, More cooling air can collide with the waterproof wall 41 to improve moisture collection.

(Third embodiment)
Below, the air blower in this embodiment is demonstrated. The air blower of this embodiment differs from the first embodiment only in the waterproof wall 45, and the other configurations are the same as those of the first embodiment, and the description thereof is omitted. FIG. 7 is a partial side configuration diagram showing the configuration in the chamber of the blower in the present embodiment.

  As shown in FIG. 7, a waterproof wall 45 extends in the vicinity of the cooling air port 40 so as to stand up in the chamber 39. The waterproof wall 45 has a base portion 46 on the ceiling surface in the chamber 39, and has a second end portion 47 extending downward from the base portion 46 and curved or inclined toward the air inlet 38 with respect to the base portion 46. It has a shape. The degree of curvature or inclination of the other end portion 47 of the waterproof wall 45 is not limited to a certain range, and the positional relationship is such that the position of the other end portion 47 is closer to the air inlet 38 with respect to the vertical direction. If it is. Further, it is desirable that the other end portion 47 is configured to be positioned below the lower end of the opening of the air intake port 38.

  FIG. 8 is a partial plan view showing the structure in the chamber of the blower shown in FIG. As shown in FIG. 8, it is desirable that the width dimension of the waterproof wall 45 is substantially equal to or larger than the opening width in the longitudinal direction of the cooling air port 40 when viewed in plan. Further, the position of the waterproof wall 45 may be approximately in the middle between the cooling air port 40 and the air intake port 38, or may be close to either the cooling air port 40 or the air intake port 38.

  In the above configuration, when the air blower is operated, the outside air or the inside air is sucked in from the suction port 31, discharged in the centrifugal direction by the blower fan 34 and rectified, and then blown to the flow path of the nose portion. A part of the air is taken in from the air intake 38 and accumulated in the chamber 39. The air once accumulated in the chamber 39 is disposed substantially diagonally downward with respect to the air intake port 38 opened upward in the chamber 39, and is slanted toward the cooling air port 40 opened upward. It flows so as to form a downward airflow. Then, the air forming this air current collides with the waterproof wall 43, is cooled, and moisture contained in the air adheres to the surface of the waterproof wall 43. The collision of the airflow at this time is promoted by the other end 47 that is curved or inclined. In particular, the other end portion 47 is positioned below the lower end of the opening of the air intake port 38, whereby the amount of airflow collision increases and the removal of moisture in the air can be promoted. The adhering moisture is further combined with the adhering moisture by the colliding air to form water droplets, and flows down along the surface of the waterproof wall 45. The dropped water droplets accumulate on the bottom surface of the chamber 39 and are stored. When the dry air is supplied into the fan casing 30, the same dry air is also supplied into the chamber 39, and the stored water is dried and evaporated by this air. Even if the situation in which the dry air is not supplied into the fan casing 30 continues for a long time, the opening surface of the cooling air port 40 is provided at a position higher than the bottom surface 28 of the chamber 39. The volume of the water storage space formed can store water droplets.

  The air from which moisture in the air has been removed in this way flows around the waterproof wall 43 and flows into the cooling air port 40. Then, the motor 35 is cooled through the cooling air passage 48 that leads from the cooling air port 40 to the lower part or the periphery of the motor 35. The air flowing through the cooling air passage 48 is discharged to the outside after the motor 35 is cooled.

  Thus, according to the blower device 3 of the present embodiment, the waterproof wall 45 has the base 46 in the chamber 39 and the other end 47 extended from the base 46, and the other end 47 is the base 46. When the structure is located closer to the air intake 38, the other end 47 of the waterproof wall 45 acts as a barrier against the airflow including water sucked into the cooling air port 40. Therefore, the blocking effect of water intrusion into the cooling air port 40 can be improved.

  In addition, the waterproof wall 45 extends from the base portion 46 provided in the chamber 39, and when the waterproof wall 45 has the other end portion 47 curved or inclined toward the air inlet 38 with respect to the base portion 46, the cooling air port 40. It acts as a barrier against the airflow containing water sucked in, and after a certain amount of water adhering to the other end portion 47 is accumulated, it becomes a lump and flows down along the shape of the other end portion. Therefore, the flow down to the bottom surface of the chamber 39 can be promoted.

It is a schematic diagram which shows the structure of the vehicle air conditioner provided with the air blower of 1st Embodiment. It is the plane schematic diagram which showed the internal structure of the fan casing of the air blower in 1st Embodiment. It is the side surface internal block diagram which showed the air blower in 1st Embodiment. It is the partial plane block diagram which showed the structure in the chamber in the air blower shown in FIG. It is the partial side surface block diagram which showed the structure in the chamber of the air blower in 2nd Embodiment. It is a partial plane block diagram which showed the structure in the chamber of the air blower shown in FIG. It is the partial side surface block diagram which showed the structure in the chamber of the air blower in 3rd Embodiment. It is a partial plane block diagram which showed the structure in the chamber of the air blower shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Air-conditioning duct 3 Blower 6 Evaporator 8 Heater unit 17, 18 Air outlet 28 Bottom face 30 Fan casing 31 Suction inlet 32 Outlet 34 Blower fan 35 Motor 36 Scroll casing part 37 Nose part side wall 38 Air inlet 39 Chamber 40 Cooling air Mouth 41, 43, 45 Waterproof wall 42, 46 Base 44, 47 Other end

Claims (5)

A fan casing (30) having a suction port (31) and a discharge port (32);
A blower fan (34) disposed inside the scroll casing portion (36) of the fan casing (30) and forming an air flow from the suction port (31) to the discharge port (32);
A motor (35) for driving the blower fan (34);
A nose portion formed downstream of the scroll casing portion (36) of the fan casing (30) in order to take in a part of the air sent into the fan casing (30) by the blower fan (34). An air intake (38) provided in the side wall (37);
A chamber (39) formed outside the scroll casing portion (36) in communication with the air intake port (38);
An air intake opening that opens in the chamber (39) at a position lower than the air intake opening (38) in the direction of gravity and communicates with the air intake opening (38) to cool the motor (35). A cooling air port (40),
A waterproof wall (41) disposed in the chamber (39) and interposed in a path from the air intake (38) to the cooling air port (40);
The air blower characterized by comprising.   The waterproof wall (43) has a base (42) and the other end (44) extending from the base (42) in the chamber (39), and the other end (44) The blower according to claim 1, wherein the blower is located closer to the cooling air port (40) than the base (42).   The waterproof wall (45) has a base (46) in the chamber (39) and the other end (47) extending from the base (46), and the other end (47) The blower according to claim 1, wherein the blower is located closer to the air intake (38) than the base (46).   The blower according to any one of claims 1 to 3, wherein the cooling air port (40) is opened at a position above the bottom surface (28) of the chamber (39).   The blower (3) according to any one of claims 1 to 4, which takes in outside air or inside air and blows the air into the air conditioning duct (1), and an evaporator (3) that cools the air blown from the blower (3). 6), a heater unit (8) for heating the air blown from the blower (3), and an outlet for blowing the air conditioned by the evaporator (6) and / or the heater unit (8) into the vehicle (17, 18). The vehicle air conditioner characterized by the above-mentioned.

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