JP2013078979A - Blowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blowing device that can control enlargement by securing a motor cooling air volume and controlling a ventilation resistance.SOLUTION: A motor 200 is disposed so that a portion of the motor exposes to externals of a case 206, and the remaining part 206 becomes a position inside of the case, and on which the air suction force acts according to the rotation of fans 201 and 202. In a motor portion exposed to the externals of the case 206, an air inlet 207 that becomes an intake of the air in the train compartment opens. In the motor part locates inside of the case 206, an air outlet 208 that communicates to the air inlet 207 through the inside of the electric motor opens. The air in the train compartment flows out from the air outlet 208 to the motor external after inhaled into the air inlet 207, and circulates the inside of the motor, and is ventilated to an air conditioning unit 3 with the air inhaled from the suction part of the fan.

Description

  The present invention relates to a blower mounted on a vehicle air conditioner and having a motor cooling structure.

  Patent Document 1 includes a motor cooling structure in an air conditioner that provides air-conditioned air to a vehicle interior after taking in air from at least one of air in the vehicle interior (inside air) and air outside the vehicle interior (outside air). The blower case that houses the fan has a cold air intake opening for taking out a part of the air blown toward the discharge port for cooling the motor near the upper end of the nose portion that forms the starting point of the scroll. The cold air intake port is connected to the air guide passage in the vicinity of the discharge port, and the outlet of the air guide passage is connected to the cooling air passage opening that opens at the bottom of the blower case. The cooling air passage opening is connected to a cooling air introduction port provided in the motor housing portion via the cooling air passage.

  When a part of the air discharged to the discharge port by the fan is taken into the air guide passage from the cooling air intake as motor cooling air, the cooling air passes through the cooling air passage from the cooling air passage opening, It flows into the motor from the cooling air inlet of the housing. The cooling air flowing inside the motor flows around the stator, the rotor, etc., proceeds in the direction of the rotation axis of the motor, and flows out of the motor through a hole opened on the opposite side to the cooling air introduction port.

  Patent Document 2 describes a motor cooling structure for a fan that provides an air flow to a radiator mounted in an engine room of an automobile.

JP 2005-88672 A Japanese Utility Model Publication No. 1-159566

  However, in the motor cooling structure described in Patent Document 1, since the pressure difference between the cooling air intake and the motor interior is determined by the pressure increase of the fan, the amount of motor cooling air that can be acquired is limited, and the motor cooling capacity cannot be secured. Sometimes. When the motor cooling capacity cannot be ensured, the motor size is increased to cope with it, resulting in an increase in apparatus cost.

  Further, air containing moisture such as outside air may be supplied to the inside of the motor, and in order to prevent this, it is necessary to provide a water intrusion prevention wall or the like in the passage from the cooling air inlet to the inside of the motor. For this reason, the motor cooling air passage may become complicated, the ventilation resistance increases, and it becomes difficult to secure the cooling air volume. In this case as well, if the motor cooling capacity cannot be ensured and the motor size is increased, the cost of the apparatus will increase.

  Further, in the case of the motor cooling structure described in Patent Document 2, since there is a passage for cooling the motor and the motor in the passage of the air that has passed through the radiator, air resistance is generated, causing a reduction in the amount of air passing through the radiator. There is a problem of becoming.

  Then, this invention is made | formed in view of the said problem, The objective is ensuring the motor cooling air volume, suppression of ventilation resistance, and providing the air blower which can suppress an enlargement.

In order to achieve the above object, the following technical means are adopted. That is, claim 1 is an invention relating to a blower device (20) provided in a vehicle air conditioner (1) that blows air conditioned by an air conditioning unit (3) toward a vehicle interior.
A fan (201, 202) that sucks at least one of vehicle interior air and vehicle exterior air and blows air toward the air conditioning unit, a motor (200) that drives the fan, and a case in which the motor is fixed and the motor is fixed (206)
The motor is arranged such that a part of the motor is exposed to the outside of the case, the remaining part is inside the case, and the air suction input along with the rotation of the fan is in a working position.
The motor portion exposed to the outside of the case has an air inlet (207) through which air inside the vehicle flows into the motor.
An air outlet (208) communicating with the air inlet (207) through the inside of the motor is opened in the motor portion located inside the case.
Car interior air is sucked into the air inlet and circulates inside the motor, then flows out of the motor through the air outlet, and is blown toward the air conditioning unit together with the air sucked from the fan suction portions (204, 205). It is characterized by that.

  According to this invention, the air inside the motor can be sucked from the air outlet by the air suction input by the fan, and blown out toward the air conditioning unit together with the air in the vehicle interior and the air outside the vehicle interior. Thereby, the ambient air of the motor part exposed to the outside of the case can be drawn into the motor from the air inlet, and the motor can be cooled when passing through the motor. Since the air drawn into the motor from the air inlet is air in the passenger compartment, it is not necessary to take a structure for preventing water intrusion or the like, and the ventilation resistance of the motor cooling passage can be suppressed. In addition, the motor cooling passage connected to the air inlet, the motor interior, and the air outlet is blown into the passage toward the air conditioning unit together with the air to be conditioned, so that the air resistance of the air to be conditioned is not provided. Therefore, it is possible to provide a blower that can ensure the amount of motor cooling air and suppress the increase in size.

According to claim 2, the case is installed behind the instrument panel (52) in the passenger compartment,
The motor portion where the air inlet (207A) opens is exposed to the outside downward from the case,
The air inflow port (207A) is characterized by opening on a side surface other than the lower surface of the motor.

  In the air blower according to the present invention, the foot of the occupant is present below the air blower installed on the back of the instrument panel. When the ram pressure related to vehicle travel is large, outside air may enter the blower unit, and further flow into the motor from the air outlet and blow out from the air inlet to the space behind the instrument panel. Therefore, according to the present invention, since the air inflow port opens on the side surface other than the lower surface of the motor, the outside air is not blown out downward, so that it is not blown out directly to the feet of the occupant. Therefore, it is possible to prevent the passenger from feeling uncomfortable due to the outside air blown out from the air inlet.

According to claim 3, the motor part where the air inlet opens is exposed to the outside downward from the case,
The air inlet (207) is opened on the lower surface of the motor, and the air outlet is opened on the upper surface of the motor.

  According to the present invention, since the motor cooling air smoothly flows from the air inlet to the air outlet in the motor, the ventilation resistance in the motor can be reduced. Therefore, the opening area of an air inflow port or an air outflow port can be suppressed, and noise into the vehicle interior can be suppressed.

According to claim 4, comprising a holder portion (206A1) for covering and supporting the motor portion exposed outside the case from the outside,
The holder portion has an air intake (231B) that serves as an air intake for the passenger compartment.
The air intake port (231B) and the air inflow port (207B) opened to the motor are provided at positions that do not coincide with each other.

  According to the present invention, since the air intake port of the holder portion and the air inlet port of the motor are provided at positions that do not coincide with each other, the brush sliding sound generated inside the motor leaks from the air inlet port. After that, since the bottom surface of the holder part once becomes an obstacle wall, it does not flow smoothly from the air inlet to the air inlet. Therefore, the bottom surface of the holder portion has a sound insulation effect before the noise inside the motor comes out from the air intake port 231B, so that the noise in the passenger compartment can be reduced. In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means of embodiment mentioned later.

It is the front view which showed the internal structure in part in order to demonstrate the vehicle air conditioner which concerns on 1st Embodiment to which this invention is applied. It is a figure for demonstrating the vehicle mounting position of a ventilation unit. It is sectional drawing which showed a part of internal structure in order to demonstrate the flow of the motor cooling air in a ventilation unit. It is a figure when the motor shown in FIG. 3 is seen toward the vehicle upper direction. It is a figure for demonstrating the state which mounts the ventilation unit which concerns on 2nd Embodiment in a vehicle. It is a partial front view for demonstrating the motor and its attachment state in the air blower of 3rd Embodiment. It is a top view when the motor shown in FIG. 6 is seen toward the vehicle upper direction. It is a partial front view for demonstrating the structure of the motor cooling channel | path in the air blower of 4th Embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. In addition to combinations of parts that clearly indicate that each embodiment can be combined specifically, the embodiments may be partially combined even if they are not clearly specified, unless there is a problem with the combination. Is possible.

(First embodiment)
A vehicle air conditioner according to a first embodiment to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a front view partially showing an internal structure in order to explain the vehicle air conditioner 1 according to the first embodiment. In FIG. 1, the upper side of the page is the upper side of the vehicle, the lower side is the lower side of the vehicle, the left side is the left side of the vehicle, the right side is the right side of the vehicle, the front side of the page is the rear side of the vehicle, and the rear side of the page is the front side of the vehicle. Yes. FIG. 2 is a view for explaining a vehicle mounting position of the blower unit 2. In FIG. 2, the upper side of the page indicates the upper side of the vehicle, the lower side indicates the lower side of the vehicle, the left direction indicates the front side of the vehicle, and the right direction indicates the rear side of the vehicle.

  As shown in FIG. 1, the vehicle air conditioner 1 includes a blower unit 2, an air conditioner unit 3 that adjusts the temperature of the blown air blown from the blower unit 2, and the blower unit 2 and the air conditioner unit 3. And a duct portion 4 constituting an air passage for connecting the two. The air conditioning unit 3, the air blowing unit 2, and the duct portion 4 are each made of a molded product of, for example, polypropylene (PP resin). Furthermore, when improving the intensity | strength of these each part, you may use PP resin containing predetermined amount of talc and glass fiber.

  As shown in FIG. 2, the blower unit 2 is disposed offset from the center portion to the passenger seat side in the space 53 behind the instrument panel 52 in the passenger compartment 51. On the other hand, the air conditioning unit 3 is disposed in a substantially central portion of the vehicle width in the space 53. Since the space 53 communicates with the passenger compartment 51 where the passenger is present, the air in the space 53 is also the passenger compartment air.

  The motor 200 of the blower 20 is fixed to a case 206 that houses the fans 201 and 202. A part of the motor 200 is exposed not to the inside of the case 206 but to the outside of the case 206, that is, the space 53 behind the instrument panel 52. A part of the motor 200 is exposed to the outside from the case 206 downward. Under the part of the motor 200 exposed to the space 53, an under cover 54 below the instrument panel is located. The under cover 54 is disposed so as to block between a part of the exposed motor 200 and the foot 40 of the occupant. The remaining portion of the motor 200 is disposed inside the case 206.

  FIG. 3 is a cross-sectional view partially showing the internal structure in order to explain the flow of the motor cooling air in the blower unit 2. In FIG. 3, the duct portion 4 is not visible in the arrow view of the III-III cross section of FIG. 1, but the duct portion 4 is shown for convenience in order to explain the air flow. In FIG. 3, the upper side of the page indicates the upper side of the vehicle, the lower side indicates the lower side of the vehicle, the left direction indicates the rear side of the vehicle, and the right direction indicates the front side of the vehicle. FIG. 4 is a view of the motor 200 shown in FIG. 3 as viewed from above the vehicle.

  As shown in FIG. 3, the air blower unit 2 includes an air intake device 22 that takes in at least one of inside air that is vehicle interior air and outside air that is outside the vehicle compartment, and dust when at least one of the outside air and the inside air passes through. And a blower device 20 provided below the filter 21. The blower 20 sucks outside air or inside air through the air intake device 22.

  The blower 20 includes two fans 201 and 202 that are centrifugal multiblade fans. Each of the fans 201 and 202 is disposed coaxially up and down by a single rotating shaft in a spiral scroll casing 203 and is simultaneously driven to rotate by a motor 200. The scroll casing 203 has a suction port 204 that is a suction portion of the fan 201 on the upper surface, and a suction port 205 that is a suction portion of the fan 202 on the lower surface. Since the upper surface and the lower surface of the scroll casing 203 are positioned in parallel or substantially parallel to the ground in the vehicle mounted state, the suction port 204 and the suction port 205 are similarly opened in a state parallel or approximately parallel to the ground.

  An air inlet 207 through which vehicle interior air flows into the motor 200 is opened in the motor portion exposed to the outside of the case 206. The air inflow ports 207 are a plurality of holes that are opened in the outer case of the motor 200 so that the inside of the motor and the outside of the motor communicate with each other, and are, for example, evenly arranged in the circumferential direction. The motor portion where the air inlet 207 is opened and exposed to the outside of the case 206 is further covered with the holder 23. The holder 23 is fixed to the mounting plate 24 while the motor 200 is fixed. The motor 200 is fixed to the holder 23 by, for example, press fitting, screw fastening, or the like. The holder 23 is fixed to the case 206 when the mounting plate 24 is attached to the case 206.

  The remaining part of the motor 200 is disposed inside the case 206 so as to be in a position where the air suction input along with the rotation of the fan 202 works. An air outlet 208 that communicates with the air inlet 207 through the inside of the motor 200 is opened in the motor portion located inside the case 206. In other words, the remainder of the motor 200 and the air outlet 208 exist in the negative pressure region of the air sucked into the inlet 205 of the fan 202. For example, the air outlet 208 is located inside the fan 202 more than the inlet 205. Preferably they are arranged. The air inlet 207 opens on the lower surface (end side) of the motor 200, and the air outlet 208 opens on the upper surface (front side) of the motor 200. The air outlet 208 is a plurality of holes that are opened in the outer case of the motor 200 so that the inside of the motor and the outside of the motor can be communicated with each other. For example, the air outlet 208 is evenly arranged in the circumferential direction.

  The holder 23 has a plurality of air intake ports 231 that are air intake ports for the passenger compartment. As shown in FIG. 4, the air inlet 231 is disposed at a position that coincides with the air inlet 207 that opens to the motor 200. That is, when the lower surface of the motor 200 is viewed upward, the air inlet 207 can be seen beyond the air inlet 231. Note that only one air inlet 207 or air outlet 208 may be opened in the motor 200.

  The air blown by the upper fan 201 is sucked from the suction port 204 from the upper side to the lower side of the scroll casing 203, and along the spiral shape of the scroll casing 203, the direction of the arrows shown in FIG. The air is blown into the duct portion 4. Air blown by the lower fan 202 is sucked from the suction port 205 from the bottom to the top of the scroll casing 203 and is blown into the duct portion 4 in the arrow direction shown in FIG. 1 along the spiral shape of the scroll casing 203. .

  The air intake device 22 is provided with an outside air inlet 220 that is an inlet for outside air outside the vehicle compartment and an inside air inlet 221 that is an inlet for inside air inside the vehicle interior. Air intake doors 223 and 224 for setting the intake mode are provided. The air intake door 223 is a door that opens and closes the outside air inlet 220. The air intake door 224 is a door that opens and closes the inside air inlet 221. For example, the outside air inlet 220 communicates with the outside of the vehicle by communicating with the vehicle cowl via a duct. Further, the inside air inlet 221 communicates with a space below the instrument panel 52 via a duct and communicates with the vehicle interior 51.

  Furthermore, the air intake device 22 includes a passage partition door 225 that changes the air flow path in the air intake device 22 together with the air intake doors 223 and 224 in accordance with the air intake mode. The passage partition door 225 partitions the internal space of the air intake device 22 and divides it into a space on the outside air inlet 220 side and a space on the inside air inlet 221 side, or releases the partition of the internal space and releases the outside air inlet. This is a door that allows the interior side of the air intake device 22 to be a single space by communicating the 220 side and the inside air inlet 221 side.

  When the air intake device 22 implements the inside / outside air two-layer mode in which both the outside air intake port 220 and the inside air intake port 221 are opened, the outside air side independent passage that separately guides the air from the respective intake ports downward. 226 and the inside air side independent passage 227 are formed. In the inside / outside air two-layer mode, the air inlet door 223 opens the outside air inlet 220, the air inlet door 224 opens the inside air inlet 221, and the passage partition door 225 is perpendicular to the surface of the filter 21. By positioning in the posture, the internal space of the air intake device 22 is partitioned into an outside air side independent passage 226 and an inside air side independent passage 227.

  The control device 5 controls the air intake mode by the air intake device 22 according to a command by manual operation or a set temperature of the auto air conditioner. The control device 5 sets the outside air mode, the inside air mode, or the inside / outside air two-layer mode as the air intake mode. Moreover, the control apparatus 5 controls the ventilation volume by the air blower 20 according to the command by manual operation and the preset temperature of an auto air conditioner. Moreover, the control apparatus 5 controls operation | movement of each blower outlet door which opens and closes each blower outlet with blowout mode according to the command by manual operation and the preset temperature of an auto air conditioner.

  The filter 21 is disposed below the outside air inlet 220 and below the inside air inlet 221, and includes two independent passages (the outside air side independent passage 226 and the inside air side independent passage 227) and the outside air in the inside / outside air two-layer mode. When the air that has passed through the continuous passage in the mode passes, dust and the like are captured. The filter 21 is formed so that its cross-sectional shape has a wave shape. When the filter 21 has a zigzag cross section with folds formed, the folds constitute ridges and valleys of the waveform. The corrugated trough is formed to extend in a direction orthogonal to the direction of the air flow from the outside air inlet 220 toward the inside air inlet 221 in the outside air mode, in other words, in the vehicle longitudinal direction. That is, the filter 21 is formed such that the cross-sectional waveform shape thereof proceeds in the mainstream direction of the outside air in the outside air mode, in other words, the vehicle left direction. The filter 21 is an air filter formed of, for example, fibers.

  In the inside / outside air two-layer mode, the blower device 20 sucks the outside air from the outside air inlet 220 through the outside air side independent passage 226 through the one side portion 210 of the filter near the outside air inlet, and sucks the inside air into the inside air inlet 221. Outside air is sucked through the inside air side independent passage 227 through the other side portion 211 of the filter near the inside air inlet. In the outside air mode, outside air from the outside air inlet 220 is sucked through both the outside air inlet and the inside air inlet through the continuous passage. In the inside air mode, the inside air from the inside air inlet 221 is sucked through both the outside air inlet and the inside air inlet through the continuous passage.

  Hereinafter, with reference to FIG. 3, the operation when the motor 200 is cooled will be described by taking the inside / outside air two-layer mode as an example.

  In the inside / outside air two-layer mode, the fan 201 and the fan 202 are driven in a state where the internal space of the air intake device 22 is partitioned into two independent passages as described above. As a result, the outside air sucked from the outside air inlet 220 passes through the outside air side independent passage 226, passes through one side portion 210 of the filter, and is then sucked into the fan 201 from the suction port 204 on the top surface of the scroll casing. To be blown. Furthermore, the inside air sucked in from the inside air inlet 221 passes through the inside air side independent passage 227, passes through the other side portion 211 of the filter, and then descends in the side space of the scroll casing 203 to enter the fan from the suction port 205 on the bottom surface of the scroll casing. The air is sucked into 202, blown into the duct portion 4, and reaches the air conditioning unit 3.

  At this time, the air inside the motor 200 is sucked into the fan 202 by the suction force accompanying the rotation of the lower fan 202. Car interior air existing in the space 53 outside the case 206 is sucked into the motor 200 from the air inlet 231 and the air inlet 207 due to the negative pressure inside the motor 200, and rotates inside the motor 200. It circulates in the axial direction (upward) and acts as motor cooling air that cools in contact with the stator core, the rotor core, etc. (broken arrows in FIG. 3). Furthermore, the vehicle interior air that has cooled the motor 200 flows out of the motor 200 through the air outlet 208, and merges with the vehicle interior air (shown by solid line arrows in FIG. 3) sucked from the suction port 204 of the fan 202. The fan 202 is blown out in the direction of centrifugal force (broken arrows and solid arrows in FIG. 3). The motor cooling air mixed with the air taken in from the inside air inlet 221 passes through the passage in the duct portion 4 together with the air blown out by the fan 201 and reaches the air conditioning unit 3.

  In the outside air mode, the air intake device 22 closes the inside air inlet 221 to open the outside air inlet 220, and the outside air flowing in from the outside air inlet 220 extends from below the outside air inlet 220 to below the inside air inlet 221. A continuous passage is formed. In the outside air mode, the air intake door 223 opens the outside air inlet 220, the air inlet door 224 closes the inside air inlet 221, and the passage partition door 225 is positioned in a posture substantially parallel to the surface of the filter 21. By doing so, a continuous passage connecting the space below the outside air inlet 220 and the space below the inside air inlet 221 is formed.

  In the outside air mode, the fan 201 and the fan 202 are driven in a state where the continuous passage is formed in the internal space of the air intake device 22 as described above. As a result, the outside air sucked in from the outside air inlet 220 flows through the continuous passage from the outside air inlet side toward the inside air inlet side, and passes through the entire surface of the filter 21. Out of the entire surface of the filter 21, the outside air that has passed through the filter portion near the outside air intake is sucked into the fan 201 from the suction port 204 on the top surface of the scroll casing and blown into the duct portion 4, and the filter portion near the inside air intake port. The outside air that has passed through the space descends in the side space of the scroll casing 203 and is sucked into the fan 202 from the suction port 205 on the lower surface of the scroll casing, blown into the duct portion 4, and reaches the air conditioning unit 3.

  Even in the outside air mode, when the fans 201 and 202 are driven, the air inside the motor 200 is sucked into the fan 202 by the suction force accompanying the rotation of the fan 202. The vehicle interior air existing in the space 53 behind the instrument panel 52 is sucked into the motor 200 from the air intake port 231 and the air inlet port 207 due to the negative pressure inside the motor 200, and the interior of the motor 200 is It circulates and acts as motor cooling air. Further, the vehicle interior air that has cooled the motor 200 flows out of the motor 200 through the air outlet 208, joins the outside air sucked in from the suction port 204 of the fan 202, and is blown out in the centrifugal force direction of the fan 202. The motor cooling air mixed with the outside air passes through the passage in the duct portion 4 together with the outside air blown out by the fan 201 and reaches the air conditioning unit 3.

  In the inside air mode, the air intake device 22 closes the outside air inlet 220 and opens the inside air inlet 221, and the inside air flowing in from the inside air inlet 221 extends from below the inside air inlet 221 to below the outside air inlet 220. A continuous passage is formed. In the inside air mode, the air inlet door 224 opens the inside air inlet 221, the air inlet door 223 closes the outside air inlet 220, and the passage partition door 225 is positioned in a posture substantially parallel to the surface of the filter 21. By doing so, a continuous passage connecting the space below the outside air inlet 220 and the space below the inside air inlet 221 is formed.

  In the inside air mode, the fan 201 and the fan 202 are driven in such a state that the continuous passage is formed in the internal space of the air intake device 22 as described above. Thereby, the inside air sucked from the inside air inlet 221 flows through the continuous passage from the inside air inlet side toward the outside air inlet side, and passes through the entire surface of the filter 21. Of the entire surface of the filter 21, the inside air that has passed through the filter portion near the outside air intake is sucked into the fan 201 from the suction port 204 on the top surface of the scroll casing and blown into the duct portion 4, and the filter portion near the inside air inlet. The inside air that has passed through the space descends in the side space of the scroll casing 203 and is sucked into the fan 202 from the suction port 205 on the lower surface of the scroll casing, blown into the duct portion 4, and reaches the air conditioning unit 3.

  Even in the inside air mode, when the fans 201 and 202 are driven, the air inside the motor 200 is sucked into the fan 202 by the suction force accompanying the rotation of the fan 202. The vehicle interior air existing in the space 53 behind the instrument panel 52 is sucked into the motor 200 from the air intake port 231 and the air inlet port 207 due to the negative pressure inside the motor 200, and the interior of the motor 200 is It circulates and acts as motor cooling air. Further, the vehicle interior air that has cooled the motor 200 flows out of the motor 200 from the air outlet 208, joins the inside air sucked from the suction port 204 of the fan 202, and is blown out in the centrifugal force direction of the fan 202. The motor cooling air mixed with the inside air passes through the passage in the duct portion 4 together with the inside air blown out by the fan 201 and reaches the air conditioning unit 3.

  The air conditioning unit 3 includes an evaporator 30, a heater core 31, an air mix door, and the like in a common case. The evaporator 30 is arranged so as to cross the passage in the case in a thin shape in the vehicle front-rear direction. Therefore, the blown air from the blower unit 2 flows into the front surface of the evaporator 30 extending in the vehicle up-down direction and the vehicle left-right direction. The evaporator 30 absorbs the latent heat of vaporization of the refrigerant in the refrigeration cycle from the conditioned air to cool the conditioned air.

  A heater core 31 is disposed at a predetermined interval behind the vehicle on the downstream side of the air flow of the evaporator 30. The heater core 31 heats the cold air that has passed through the evaporator 30, hot hot water (for example, engine cooling water) flows through the heater core 31, and heats the air using the hot water as a heat source.

  A cold air bypass passage is formed above the heater core 31 in the case so as to bypass the heater core 31 and allow the cold air to flow therethrough. Further, an air mix that adjusts the air volume ratio between the warm air heated by the heater core 31 and the cool air that bypasses the heater core 31 through the cold air bypass passage is provided at a portion between the heater core 31 and the evaporator 30 in the case. A door is provided.

  The air mix door adjusts the ratio between the amount of warm air passing through the heater core 31 and the amount of cool air not passing through the heater core 31 depending on its position. The air mix door adjusts the air volume ratio of the cold air and the hot air according to the opening degree, and adjusts the temperature of the conditioned air. The control device 5 controls the position of the air mix door according to a command by manual operation or a set temperature of the auto air conditioner.

  In the case, an air mix chamber is formed, which is a space where the cold air flowing from the evaporator 30 and the hot air heated by the heater core 31 are mixed. The conditioned air whose temperature is adjusted in this space can be supplied to the vehicle interior at an appropriate air volume ratio by controlling the doors that open and close the air outlets connected to the vehicle interior.

  Below, the effect which the vehicle air conditioner 1 of this embodiment brings is described. The vehicle air conditioner 1 includes a blower unit 2 and an air conditioning unit 3. The blower unit 2 includes an air intake device 22, a filter 21, and a blower device 20. A part of the motor 200 of the blower 20 is exposed to the outside of the case 206, and the remaining part is inside the case 206, so that the air suction input accompanying the rotation of the fans 201 and 202 acts. . An air inflow port 207 that serves as an intake port for vehicle interior air is opened in the motor portion exposed to the outside of the case 206. An air outlet 208 communicating with the air inlet 207 through the motor is opened in the motor portion located inside the case 206. After the vehicle interior air is sucked into the air inlet 207 and circulated through the motor, it flows out of the motor through the air outlet 208 and is blown toward the air conditioning unit 3 together with the air sucked from the suction portion of the fan.

  According to this configuration, the air inside the motor is sucked from the air outlet 208 by the air suction input by the fan 202, and the air conditioning unit together with the vehicle interior air and the vehicle exterior air taken in from the outside air inlet 220 and the inside air inlet 221. It can be blown out toward 3. That is, the motor cooling air is mixed with the mainstream air taken in from the outside air inlet 220 and the inside air inlet 221 and is provided to the vehicle interior as conditioned air. As a result, ambient air around the motor portion exposed to the outside of the case 206 can be drawn into the motor through the air inlet 207, and the motor 200 can be cooled when passing through the motor.

  Since the air drawn into the motor from the air inlet 207 is the air in the vehicle interior, it is not the air that carries moisture together like the outside air, and there is no need to take a structure for preventing water intrusion or the like. For this reason, since the shape of a motor cooling channel | path can be made into a simple structure, the ventilation resistance of the said channel | path can be suppressed and securing of the amount of cooling air can be aimed at. In addition, the motor cooling passage connected to the air inlet 231, the air inlet 207, the inside of the motor, and the air outlet 208 is blown out to the passage toward the air conditioning unit 3 together with the air to be conditioned. For this reason, since the motor cooling passage is not a passage formed in the main flow passage of the conditioned air, it does not increase the ventilation resistance or pressure loss of the conditioned air. Therefore, the enlargement of the apparatus can be suppressed.

  Further, the motor portion where the air inlet 207 opens is exposed to the outside from the case 206 downward. The air inlet 207 opens on the lower surface of the motor 200, and the air outlet 208 opens on the upper surface of the motor 200.

  According to this configuration, the motor cooling air can smoothly flow in the direction of the rotation axis from the air inlet 207 to the air outlet 208 inside the motor. For this reason, since the path of the motor cooling air inside the motor does not become complicated, the ventilation resistance can be reduced. Therefore, since the opening area of the air inlet 207 and the air outlet 208 can be suppressed, the sound propagation route can be suppressed and the noise to the vehicle interior 51 can be reduced.

(Second Embodiment)
2nd Embodiment is embodiment which changes 1st Embodiment about the structure of 20 A of air blowers. FIG. 5 is a diagram for explaining a state in which the blower unit 2A according to the second embodiment is mounted on a vehicle. The air blower 20A differs from the blower 20 of the first embodiment in the positions of the air inlet 207A and the air intake 231A. The form not particularly described is the same as that of the first embodiment, and different forms will be mainly described below.

  In the blower 20A, the air inlet 207A is formed on the side surface other than the lower surface of the motor 200A, and the air inlet 231A is also formed in the holder 23 so as to be in the same position as the air inlet 207A. In particular, the air inlet 207A and the air inlet 231A are preferably provided on the front side of the vehicle. In this case, even when a backflow of outside air generated by the ram pressure blows out from the air intake port 231 </ b> A, it can be prevented from blowing out toward the passenger's feet 40. Therefore, it is not necessary to provide the under cover 54 described in the first embodiment.

  According to this embodiment, the motor portion where the air inlet 231A and the air inlet 207A open is exposed to the space 53 downward from the case 206, and the air inlet 231A and the air inlet 207A are the lower surface of the motor 200A. Open on the other side.

  In the case of the blower provided in the space 53 behind the instrument panel 52, the feet of the occupant are present below the blower 20A. When the ram pressure related to vehicle travel is large, outside air may enter the air blower unit 2A, further flow into the motor from the air outlet 208, and blow out into the space 53 from the air inlet 207A or the like. At this time, there is a problem in that a reverse flow hits the passenger's feet 40 and gives discomfort. Therefore, according to the present embodiment, since the air inlet 207A and the air inlet 231A are opened on the side surface other than the lower surface of the motor 200A, the outside air is not blown downward, so that it is not blown directly to the passenger's feet 40. . Therefore, it is possible to provide the air blower 20A that does not give the passenger an uncomfortable feeling due to the outside air blown out from the air inlet 207A and the air inlet 231A.

(Third embodiment)
3rd Embodiment is embodiment which changes 1st Embodiment about the structure of the air blower 20B. FIG. 6 is a partial front view for explaining the motor 200B and its attachment state in the blower 20B of the third embodiment. FIG. 7 is a plan view of the motor 200B shown in FIG. 6 as viewed from above the vehicle. The air blower 20B differs from the air blower 20 of the first embodiment in the structure of the holder that supports the motor and the relative positions of the air inlet 231B and the air inlet 207B. The form not particularly described is the same as that of the first embodiment, and different forms will be mainly described below.

  The holder portion 206A1 that supports the lower portion of the motor 200B is a part of the case 206A and is a recess that is formed in the case 206A and into which the lower portion of the motor 200B is press-fitted. The motor 200B is integrally fixed to the case 206A by press-fitting a lower portion thereof into the holder portion 206A1.

  The air outlet 208B is formed on the upper surface of the motor 200B, and the air inlet 207B is formed on the lower surface of the motor 200B. The air inlet 231B is also formed on the bottom surface of the holder portion 206A1 in the same manner as the air inlet 207B. The air inlet 231B and the air inlet 207B that opens to the motor 200B are provided at positions that do not coincide with each other. As shown in FIG. 7, when the lower surface of the motor 200B is viewed upward, the entire air inlet 207B cannot be seen beyond the air inlet 231B. That is, the air inflow port 207B is set at a position where the entire air inflow port 207B cannot be seen or only partially visible through the air intake port 231B.

  According to the present embodiment, the blower 20B includes the holder portion 206A1 that covers and supports the motor portion exposed to the outside of the case 206A from the outside. The holder portion 206A1 has an air intake port 231B serving as an intake port for vehicle interior air. The air inlet 231B and the air inlet 207B that opens to the motor 200B are provided at positions that do not coincide with each other.

According to the present embodiment, the air inlet 231B and the air inlet 207B are provided at positions shifted from each other when the lower surface of the motor 200B is viewed upward, so that, for example, the motor 200B that has passed through the air inlet 207 The brush sliding sound leaks into the vehicle interior 51 through the air intake port 231B to the outside once the bottom surface of the holder portion 206A1 becomes an obstacle wall. Since the sound propagation is not smooth due to the obstacle wall, the effect of blocking the sound leakage can be obtained, so that the noise to the vehicle interior 51 can be reduced (fourth embodiment).
4th Embodiment is embodiment which changes 1st Embodiment about the structure of the air blower 20B. FIG. 8 is a partial front view for explaining the structure of the motor cooling passage in the blower 20C of the fourth embodiment. The air blower 20C differs from the air blower 20 of the first embodiment in the positions of the air inlet 207C, the air outlet 208C, and the air inlet 231C in the motor cooling passage. The form not particularly described is the same as that of the first embodiment, and different forms will be mainly described below.

  The motor 200C has an air inlet 207C and an air outlet 208C open on the same side of the side surface that is not the lower surface. The holder 23 </ b> C has an air inlet 231 </ b> C open on a side surface that is not the bottom surface. The air inlet 231C opens at a position that matches the air inlet 207C.

  When the air inlet 207C and the air outlet 208C are opened on the opposite sides of the side, the motor cooling air flows widely in the circumferential direction inside the motor, so that a wide range of the stator core and the rotor core can be cooled. Improvement in cooling performance can be expected.

  Further, when the air inlet 231C opens at a position shifted from the air inlet 207C, the same noise reduction effect as that in the vehicle interior 51 as in the third embodiment can be achieved.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the above-described embodiment, the fans mounted on the blower device 20 are the fan 201 and the fan 202 that rotate coaxially and simultaneously, but the present invention is not limited to such a form. For example, the fan mounted on the blower 20 may be a single fan.

  The air intake doors 223 and 224 described in the above embodiment are cantilevered doors, but a butterfly type door having a support portion at the center of the door body, a slide movement type door that moves in parallel, and the like. Other types of doors may be used.

  In the above embodiment, the motor portion exposed to the outside of the case 206 is covered with the holder 23, but the present invention is not limited to this configuration, and the motor portion may be directly exposed to the space 53 behind the instrument panel 52. .

  In the above embodiment, the shapes of the air inlets 231, 231A, 231B, 231C, the air inlets 207, 207A, 207B, 207C, and the air outlets 208, 208B, 208C are not limited to the illustrated shapes. The shape and the number of openings are appropriately set depending on the required cooling air volume and cooling capacity.

  In the embodiment described above, the holder 23 that fixes the motor 200 is a component that supports the end side of the motor 200, but may be a form that includes a holder that supports the front side of the motor 200.

DESCRIPTION OF SYMBOLS 1 ... Vehicle air conditioner 2 ... Air blower unit 3 ... Air conditioner unit 20 ... Air blower 22 ... Air intake device 52 ... Instrument panel 200 ... Motor 201, 202 ... Fan 204, 205 ... Suction port (suction part of air blower)
206 ... Case 206A1 ... Holder part 207,207A, 207B ... Air inlet 208 ... Air outlet 231B ... Air inlet

Claims (4)

A blower device (20) provided in a vehicle air conditioner (1) for blowing air conditioned by an air conditioning unit (3) toward a passenger compartment (51),
Fans (201, 202) for sucking at least one of vehicle interior air and vehicle exterior air and blowing air toward the air conditioning unit;
A motor (200) for driving the fan;
A case (206) for housing the fan and fixing the motor;
With
The motor is arranged such that a part of the motor is exposed to the outside of the case, the remaining part is inside the case, and the air suction input accompanying the rotation of the fan is at a position where it works.
The motor portion exposed to the outside of the case has an air inlet (207) through which the passenger compartment air flows into the motor.
An air outlet (208) communicating with the air inlet (207) through the motor is opened in the motor portion located inside the case.
The vehicle interior air is sucked into the air inlet and flows through the motor, then flows out of the motor through the air outlet, and together with the air sucked from the suction portions (204, 205) of the fan. A blower characterized by being blown toward an air conditioning unit. The case is installed behind the instrument panel (52) in the vehicle compartment,
The motor portion where the air inlet (207A) opens is exposed to the outside downward from the case,
The air blower according to claim 1, wherein the air inflow port (207A) opens on a side surface other than the lower surface of the motor. The motor part where the air inlet opens is exposed to the outside downward from the case,
The blower according to claim 1, wherein the air inlet (207) opens on a lower surface of the motor, and the air outlet opens on an upper surface of the motor. A holder portion (206A1) for covering and supporting the motor portion exposed outside the case from the outside,
An air intake (231B) serving as an intake for the vehicle interior air is opened in the holder portion,
The air intake (231B) and the air inlet (207B) that opens to the motor are provided at positions that are not coincident with each other. The blower described in the paragraph.

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