JP5291401B2 - Fan unit and vehicle cooling system using the same - Google Patents

Description

  The present invention relates to a fan unit for passing cooling air (outside air) to a radiator of an engine mounted on an automobile or the like, a condenser of an air conditioner, and the like, and a vehicle cooling system using the same.

  As a vehicle cooling system, for example, a condenser and / or a radiator, a fan (propeller fan), and a fan motor are sequentially arranged in the front part of an engine room from the front side, and these are integrated into a module (also referred to as CRFM). However, it has been widely known (see, for example, Patent Documents 1 and 2). In this CRFM, a shroud is provided in which the cross-sectional area of the internal flow passage gradually decreases from the condenser and / or radiator toward the outer periphery of the fan on the downstream side, and the outside air sucked through the condenser and radiator is guided to the propeller fan. . The shroud is provided with a motor support stay having a plurality of stays and stays extending radially from the rotation center of the propeller fan in order to support a fan motor provided on the downstream side of the propeller fan.

JP 2004-205120 A Special table 2004-513300 gazette

  However, in the conventional CRFM, a motor support stay is provided on the downstream side (blowing side) of the propeller fan, so that the length in the ventilation direction from the condenser and / or radiator to the motor support stay is kept within a certain size. Then, the distance between the propeller fan and the condenser or radiator disposed on the upstream side thereof becomes small. For this reason, the downstream surface of the condenser or radiator and the upstream shroud surface of the propeller fan are arranged close to each other, the pressure loss of the air blowing system increases, and the wind speed distribution of the cooling air flowing through the condenser or radiator is increased. It becomes non-uniform. As a result, there is a problem in that heat exchange efficiency in the condenser or the radiator is lowered and blowing sound and fan motor input are increased.

  When the CRFM is provided in the front part of the engine room, the engine is generally disposed behind the engine room. Therefore, it is inevitable that the fan motor is heated to a high temperature by heat radiated from the engine. Therefore, although heat resistance measures such as increasing the heat resistance of the fan motor and providing a heat shielding plate behind the fan motor are taken, there is a problem that the cost of the fan motor increases accordingly.

  The present invention has been made in view of such circumstances, and can suppress pressure loss to improve fan performance, reduce blowing noise and fan motor input, and heat resistance measures for fan motors. An object of the present invention is to provide a fan unit and a vehicle cooling system using the fan unit that can reduce the cost and reduce the cost.

In order to solve the above problems, the fan unit of the present invention and the vehicle cooling system using the same employ the following means.
That is, a fan unit according to the present invention is supported by a shroud having a bell mouth for guiding air sucked through an upstream device to the fan side, a motor support stay provided in the shroud, and the motor support stay. In a fan unit including a fan motor and a propeller fan attached to a rotation shaft of the fan motor and rotated in the bell mouth, the motor support stay is disposed on the upstream side of the propeller fan, and the motor The fan motor is attached to a support stay, and the propeller fan is provided downstream of the motor support stay.

  According to the present invention, the motor support stay is disposed on the upstream side of the propeller fan, the fan motor is attached to the motor support stay, and the propeller fan is provided on the downstream side of the motor support stay. A sufficient suction space can be secured between the upstream device and the propeller fan without changing the thickness direction dimension (axial dimension). As a result, the pressure loss of the blower system can be suppressed, the fan performance can be improved, and the blowing sound and fan motor input can be reduced. In addition, even when a heat source is provided on the downstream side in the vicinity of the fan unit, the fan motor can be separated from the heat source, so that heat damage to the fan motor due to heat radiated from the heat source can be prevented. At the same time, heat resistance measures can be simplified and costs can be reduced.

  Furthermore, the fan unit of the present invention is characterized in that in the above fan unit, the motor support stay has a plurality of radially provided stays, and is integrally formed on the inner surface side of the shroud. To do.

  According to the present invention, the motor support stay has a plurality of radially provided stays and is integrally formed on the inner surface side of the shroud. Therefore, the fan is provided at the central portion of the motor support stay integrally formed with the shroud. A motor and a propeller fan can be attached and supported by a shroud through a plurality of stays. Therefore, even if the motor support stay is arranged on the upstream side of the propeller fan, the fan motor and propeller fan are firmly attached to the downstream side of the motor support stay integrally formed on the inner surface side of the shroud as in the conventional case. Can be installed.

  Furthermore, the fan unit of the present invention is the above fan unit, wherein the plurality of stays are arranged such that a downstream inner peripheral end portion of a coupling portion with the shroud is located closer to a fan rotation center than an inner diameter of the bell mouth. It is characterized by.

  According to the present invention, since the downstream inner peripheral end coupled to the shrouds of the plurality of stays is located closer to the fan rotation center than the inner diameter of the bell mouth, the shroud and the motor support stay are integrally formed. Even in this case, the downstream inner peripheral end connected to the shrouds of the plurality of stays is not undercut, and can be easily punched during injection molding. Therefore, the integral molding of the shroud and the motor support stay with the resin material is facilitated, and the cost can be reduced.

  Furthermore, the fan unit according to the present invention is the fan unit according to any one of the above-described fan units, wherein the plurality of stays are extended in a radial direction, and outer ends thereof are bent downstream to be integrally coupled to the inner surface of the shroud. It is characterized by being.

  According to the present invention, the plurality of stays are extended in the radial direction, and the outer end portions thereof are bent downstream and are integrally coupled to the inner surface of the shroud. Can be made smaller. Thereby, pressure loss due to a plurality of stays can be reduced and fan performance can be improved. Also, when stress in the fan rotation axis acts on the fan motor or propeller fan, the stay is easily deformed and the stress can be distributed throughout the motor support stay, preventing damage to the stay due to stress concentration. Can do.

  Furthermore, the fan unit according to the present invention is characterized in that, in any one of the above-described fan units, the plurality of stays have an outer end portion extending in a radial direction inclined toward an upstream side.

  According to the present invention, since the outer end side extended in the radial direction of the plurality of stays is inclined toward the upstream side, when axial stress acts on the fan motor, the motor support stay is , A radial compressive force is applied, thereby suppressing the displacement of the fan motor. Therefore, when a stress in the fan rotation axis direction acts on the fan motor or the propeller fan, the fan motor can be made difficult to collide with the upstream device. In addition, since a distance can be secured between the fan blade and the stay on the outer peripheral side of the propeller fan, it is possible to suppress damage caused by contact between the fan blade and the stay when the same stress is applied. it can. Furthermore, since the fan motor and the propeller fan can be supported at positions closer to the center of gravity at the center of the motor support stay, vibration due to unbalance can be made difficult to occur.

  Further, in the fan unit of the present invention, in any one of the above fan units, the plurality of stays have a thickness in the fan rotation axis direction larger than a cross-sectional thickness in a direction perpendicular to the fan rotation axis. It is characterized by that.

  According to the present invention, since the thickness of the plurality of stays in the fan rotation axis direction is larger than the thickness of the cross section in the direction perpendicular to the fan rotation axis, the strength as the stay is suppressed while suppressing the draft resistance by the stay. Can be secured sufficiently. Therefore, the pressure loss due to the stay can be reduced to improve the fan performance, and the rotational vibrations of the fan motor and the propeller fan can be sufficiently suppressed.

  Furthermore, the fan unit of the present invention is characterized in that, in any one of the above fan units, the plurality of stays are inclined in the fan rotation direction on the outer end side extended in the radial direction.

  According to the present invention, since the outer end side extended in the radial direction of the plurality of stays is inclined in the fan rotation direction, the fan rotation direction with respect to the air flow sucked from the fan outer peripheral side toward the center direction The stay inclined in the direction can give a pre-turn in the direction opposite to the fan rotation direction and can be sucked into the fan center side. Therefore, fan efficiency can be improved.

  Furthermore, the fan unit of the present invention is characterized in that, in any one of the fan units described above, the plurality of stays are provided with a ring member protruding upstream from the stays and the fan motor. And

  According to the present invention, the plurality of stays are provided with the ring member protruding upstream from the stay and the fan motor, so that the stress in the fan rotation axis direction acts on the fan motor or the propeller fan. Even if the stay is deformed, the fan motor and the stay do not directly contact or collide with the upstream equipment, and therefore the damage can be prevented. Further, even if the ring member contacts or collides with the upstream device, the impact at the time of the collision can be dispersed in the circumferential direction of the ring member, so that it is difficult to damage each other.

  Furthermore, the fan unit of the present invention is characterized in that, in the above fan unit, the ring member is a cylindrical ring.

  According to the present invention, since the ring member is a cylindrical ring, ventilation resistance by the ring member can be minimized, pressure loss can be suppressed, and the circumference can be made as long as possible. it can. Therefore, by preventing the increase of blowing sound and fan motor input due to the provision of the ring member, the impact dispersion effect at the time of collision is enhanced by increasing the circumference of the ring member, so that the fan motor, stay, upstream device, etc. It can be made more difficult to damage.

  Furthermore, the fan unit of the present invention is the fan unit according to any one of the above-described fan units, wherein the ring member has a diameter that is 1 to 1.5 times the outer diameter of the fan motor and extends in a radial direction. It is characterized by being provided concentrically with the fan rotation shaft with respect to the stay.

  According to the present invention, the ring member has a diameter of 1 to 1.5 times the fan motor outer diameter, and is provided concentrically with the fan rotation shaft with respect to a plurality of stays extending in the radial direction. Therefore, the ring member can be provided in a region where the wind speed is relatively small with respect to the wind speed distribution on the suction side of the propeller fan. Therefore, the influence on fan performance by providing the ring member can be minimized.

  Furthermore, the fan unit of the present invention is characterized in that, in any one of the above fan units, the ring member is provided so as to contact the upstream device.

  According to the present invention, since the ring member is provided so as to contact the upstream device, even if the fan motor or propeller fan is subjected to stress in the fan rotation axis direction, the ring member and the upstream device The relative positional relationship between the two does not change, and the collision between the two can be avoided as much as possible. Therefore, mutual damage due to impact at the time of collision can be prevented.

  The vehicle cooling system according to the present invention further includes a fan unit that cools the radiator and / or the condenser by ventilating outside air to a radiator for an engine and / or a condenser for an air conditioner mounted on an automobile. One of the above-mentioned fan units is disposed downstream of the radiator and / or the condenser in the cooling system for use.

  According to the present invention, since any one of the above fan units is disposed downstream of the engine radiator and / or the air conditioner condenser, the radiator and / or condenser and the fan unit are provided. The suction space between the downstream surface of the radiator and / or condenser and the propeller fan can be increased without changing the thickness dimension of the existing vehicle cooling system, that is, while maintaining the thickness dimension to a minimum. . Therefore, the pressure loss of the air blowing system can be suppressed, the fan performance can be improved, and the blowing sound and the fan motor input can be reduced. Moreover, even when the engine is disposed close to the downstream side of the fan unit, the engine and the fan motor can be sufficiently separated from each other, so that the fan motor is thermally damaged by the radiant heat from the engine. Therefore, the heat resistance measures can be simplified and the cost can be reduced.

  According to the fan unit of the present invention, a sufficient suction space can be secured between the upstream device and the propeller fan without changing the thickness direction dimension (axial dimension) of the fan unit. Pressure loss can be suppressed, fan performance can be improved, and blowing sound and fan motor input can be reduced. In addition, even when a heat source is provided on the downstream side in the vicinity of the fan unit, the fan motor can be separated from the heat source, so that heat damage to the fan motor due to heat radiated from the heat source can be prevented. At the same time, heat resistance measures can be simplified and costs can be reduced.

  Further, according to the vehicle cooling system of the present invention, the thickness direction dimension of the vehicle cooling system including the radiator and / or the condenser and the fan unit is kept unchanged, that is, the thickness direction dimension is kept to a minimum. Since the suction space between the radiator and / or condenser downstream surface and the propeller fan can be increased, the pressure loss of the blower system can be suppressed, the fan performance can be improved, and the Sound and fan motor input can be reduced. Moreover, even when the engine is disposed close to the downstream side of the fan unit, the engine and the fan motor can be sufficiently separated from each other, so that the fan motor is thermally damaged by the radiant heat from the engine. Therefore, the heat resistance measures can be simplified and the cost can be reduced.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 3.
1 is an exploded perspective view of a vehicle cooling system including a fan unit according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. The perspective view which looked at the unit from the radiator mounting part side is shown.
A cooling system for a vehicle ((CRFM) 1) is formed by assembling a condenser 2 for an air conditioner, a radiator 3 for a traveling engine, and a fan unit 4 through a bracket (not shown). Is modularized.

  The condenser 2 is a device that constitutes the refrigeration cycle of the air conditioner. For example, a parallel flow type heat exchanger is used. Capacitor 2 has a function of condensing and liquefying high-temperature and high-pressure refrigerant gas circulated from the compressor by heat exchange with the outside air and cooling, and then supplying the refrigerant to downstream equipment constituting the refrigeration cycle It is.

  The radiator 3 is a device that cools the cooling water of the vehicle travel engine, and for example, a parallel flow type heat exchanger is used. In the radiator 3, since the cooling water whose temperature has been increased by cooling around the combustion chamber of the engine is circulated to the radiator 3 through the cooling water pump, the cooling water is cooled by exchanging heat with the outside air, and then again It has a function which cools an engine by supplying to.

  The fan unit 4 includes a shroud 5 having a bell mouth 5A for guiding air (outside air) sucked through the condenser 2 and the radiator 3 provided on the upstream side to the fan side, and a motor support stay 6 provided on the shroud 5. A fan motor 7 supported by the motor support stay 6 and a propeller fan 8 attached to a rotating shaft 7A of the fan motor 7 and rotated within the bell mouth 5A are provided.

  The shroud 5 is configured such that the internal flow passage cross-sectional area gradually decreases from the condenser 2 and the radiator 3 toward the outer periphery of the fan on the downstream side, and guides the outside air sucked through the condenser 2 and the radiator 3 to the fan side. There is an opening having a bell mouth 5A at the center. The shroud 5 is made of a resin material and is integrally formed with the motor support stay 6 by injection molding.

  The motor support stay 6 is provided integrally with the shroud 5 on the upstream side of the bell mouth 5 </ b> A on the inner surface side of the shroud 5. The motor support stay 6 includes a motor support portion 6A for attaching and supporting the fan motor 7 at the central portion, and a plurality of (main book) extending radially from the motor support portion 6A and integrally coupled to the inner surface of the shroud 5. In the example, six stays 6B are provided. Here, as shown in FIG. 2, the downstream inner peripheral end 6C of the connecting portion of each stay 6B with the inner surface of the shroud 5 is positioned closer to the fan rotation center than the inner diameter of the bell mouth 5A. The downstream inner peripheral end 6C connected to the shroud 5 of each stay 6B is configured not to be undercut so that it can be easily punched during injection molding.

  As the fan motor 7, a thin motor having a motor case fixed to the motor support 6 </ b> A of the motor support stay 6 via a bolt or the like is used. The fan motor 7 has a configuration in which a rotating shaft (fan rotating shaft) 7A is projected on the downstream side, and a propeller fan 8 is attached to the rotating shaft 7A.

  The propeller fan 8 is provided with a plurality of fan blades (blades) 8B around a cylindrical hub 8A, and a propeller fan 8 made of a resin material obtained by integrally injection-molding the hub 8A and the fan blades 8B. Can be used. The propeller fan 8 is configured such that a hub 8 </ b> A is fixed to a rotating shaft (fan rotating shaft) 7 </ b> A of the fan motor 7, and is rotated integrally by the rotational drive of the fan motor 7.

  As described above, in the present embodiment, as shown in FIGS. 1 to 3, the motor support stay that supports the fan motor 7 and the propeller fan 8 in the fan unit 4 provided to face the downstream surface of the radiator 3. 6 is provided integrally with the shroud 5 so as to be positioned on the upstream side of the propeller fan 8, and the fan motor 7 is attached to the motor support stay 6, and the fan motor 7 is disposed downstream of the motor support stay 6. The propeller fan 8 is provided on the rotating shaft 7A.

With the configuration described above, according to the present embodiment, the following operational effects are achieved.
When the fan motor 7 is driven and the propeller fan 8 is rotated, outside air is sucked from the front surface of the condenser 2 through the condenser 2 and the radiator 3. The outside air flows through the condenser 2 and the radiator 3, and then is guided to the propeller fan 8 through the shroud 5, and is blown out to the downstream side through the opening that forms the bell mouth 5 </ b> A by the propeller fan 8.

  Therefore, in the present embodiment, in the vehicle cooling system (CRFM) 1 configured to cool the refrigerant and the engine coolant, the motor support stay 6 constituting the fan unit 4 is disposed on the upstream side of the propeller fan 8. Since the fan motor 7 is attached to the motor support stay 6 and the propeller fan 8 is provided on the downstream side of the motor support stay 6, the thickness direction dimension (rotation axis direction dimension) of the CRFM 1 or the fan unit 4. In other words, it is possible to secure a sufficient suction space between the downstream surface of the radiator 3 provided on the upstream side and the propeller fan 8 while maintaining the respective thickness direction dimensions at the minimum dimensions without changing It becomes.

  For this reason, it is possible to suppress the pressure loss of the blower system, to improve the fan performance, and to reduce the blowing sound and the fan motor input. Even when a heat source such as an engine is installed close to the downstream side of the fan unit 4, the fan motor 7 can be separated from the heat source such as the engine. It is possible to prevent the fan motor 7 from being damaged by heat, simplify heat-resistant measures, and reduce costs.

  Further, since the motor support stay 6 having a plurality of stays 6B provided radially is integrally formed on the inner surface side of the shroud 5, the fan motor is provided at the central portion of the motor support stay 6 integrally formed with the shroud 5. 7 and the propeller fan 8 can be attached and supported by the shroud 5 via a plurality of stays 6B. For this reason, even if the motor support stay 6 is disposed upstream of the propeller fan 8, the fan motor is provided downstream of the motor support stay 6 integrally formed on the inner surface side of the shroud 5 as in the conventional case. 7 and the propeller fan 8 can be firmly installed.

  Further, since the downstream inner peripheral end 6C coupled to the shroud 5 of the plurality of stays 6B described above is located closer to the fan rotation center than the inner diameter of the bell mouth 5A, the shroud 5, the motor support stay 6 and Is integrally molded, the downstream inner peripheral end 6C coupled to the shroud 5 of the plurality of stays 6B is not undercut, and can be easily punched during injection molding. For this reason, integral molding with the resin material of the shroud 5 and the motor support stay 6 does not become difficult, and an increase in cost can be suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG.
The present embodiment is different from the first embodiment in the configuration of the outer end portion coupled to the inner surface of the shroud 5 of the plurality of stays 6B in the motor support stay 6. Since other points are the same as those in the first embodiment, description thereof will be omitted.
In the present embodiment, as shown in FIG. 4, the motor support stay 6 has an outer end portion 6 </ b> D that is coupled to the inner surface of the shroud 5 of the plurality of stays 6 </ b> B extended in the radial direction bent to the downstream side. Thus, the inner surface of the shroud 5 is integrally coupled.

  As described above, the outer diameters of the plurality of stays 6B are obtained by bending the outer end portions 6D of the plurality of stays 6B extending in the radial direction to the downstream side so as to be integrally coupled to the inner surface of the shroud 5. Can be made as small as possible. For this reason, pressure loss due to the plurality of stays 6B can be reduced, and fan performance can be improved. In addition, when stress in the direction of the fan rotation axis is applied to the fan motor 7 or the propeller fan 8 due to a collision accident or the like, the stay 6B is easily deformed, and the stress can be dispersed throughout the motor support stay 6. Breakage of the stay 6B due to concentration can be prevented.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to FIG.
The present embodiment differs from the first and second embodiments described above in the configuration of a plurality of stays 16B in the motor support stay 6. Since other points are the same as those in the first and second embodiments, description thereof will be omitted.
In the present embodiment, the plurality of stays 16B in the motor support stay 6 are configured such that the outer end 6D side extended in the radial direction is inclined toward the upstream side, as shown in FIG.

  As described above, by setting the outer end 6D side extended in the radial direction of the plurality of stays 16B to be inclined toward the upstream side, the axial stress on the radiator 3 side with respect to the fan motor 7 Acts, a radial compressive force acts on the motor support stay 6, whereby the displacement of the fan motor 7 can be suppressed. For this reason, it is possible to make the fan motor 7 difficult to collide with the radiator 3 when stress in the fan rotation axis direction is applied to the fan motor 7 or the propeller fan 8 due to a collision accident or the like. Further, since a distance can be secured between the fan blade 8B and the stay 16B on the outer peripheral side of the propeller fan 8, when the same stress is applied, the fan blade 8B and the stay 16B come into contact with each other. Damage can be suppressed. Furthermore, since the fan motor 7 and the propeller fan 8 can be supported by the center portion of the motor support stay 6 at positions closer to the center of gravity, it is possible to make it difficult for vibration due to unbalance to occur.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described with reference to FIG.
This embodiment differs from the first to third embodiments described above in the configuration of the plurality of stays 26B in the motor support stay 6. Since other points are the same as those in the first to third embodiments, the description thereof will be omitted.
In the present embodiment, as shown in FIG. 6, the plurality of stays 26B in the motor support stay 6 have a thickness T in the direction of the fan rotation axis (rotation axis) 7A perpendicular to the fan rotation axis (rotation axis) 7A. It is larger than the thickness t of the cross section in the direction, and T> t. Further, as shown in FIG. 6, the plurality of stays 26 </ b> B are formed in a spiral shape, and the outer end 6 </ b> D side extended in the radial direction is inclined in the fan rotation direction N.

  As described above, by making the thickness T of the plurality of stays 26B in the motor support stay 6 in the direction of the fan rotation shaft (rotation shaft) 7A larger than the thickness t of the cross section perpendicular to the fan rotation shaft 7A. Further, the strength as the stay 26B can be sufficiently ensured while suppressing the ventilation resistance by the stay 26B. Therefore, the pressure loss due to the stay 26B can be reduced to improve the fan performance, and the rotational vibrations of the fan motor 7 and the propeller fan 8 can be sufficiently suppressed.

  Further, since the plurality of stays 26B are provided in a spiral shape and the outer end 6D side extended in the radial direction is inclined in the fan rotation direction N, the air flow sucked from the fan outer peripheral side toward the center direction On the other hand, the stay 26B inclined in the fan rotation direction N can give a pre-turn S in a direction opposite to the fan rotation direction N and can be sucked into the fan center side. For this reason, fan efficiency can be improved.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described with reference to FIGS.
This embodiment is different from the first to fourth embodiments described above in that a ring member 9 is provided on a plurality of stays 6B (16B, 26B) of the motor support stay 6. Since other points are the same as those in the first to fourth embodiments, description thereof will be omitted.
In the present embodiment, a plurality of stays 6 </ b> B (16 </ b> B, 26 </ b> B) of the motor support stay 6 are provided with a ring member 9 that protrudes upstream from the stay 6 </ b> B (16 </ b> B, 26 </ b> B) and the fan motor 7. .

  The ring member 9 can be constituted by a ring having various shapes, but a cylindrical ring is desirable as shown in FIG. The ring member 9 is preferably provided in a region where the wind speed is relatively small with respect to the wind speed distribution on the suction side of the propeller fan 8, and has an outer diameter 1 to 1.5 times the outer diameter of the fan motor 7. The cylindrical ring is provided in a concentric manner with the fan rotation shaft 7A between a plurality of stays 6B (16B, 26B) extending in the radial direction.

  Thus, according to the present embodiment, as described above, since the ring member 9 protruding upstream from the stay 6B and the fan motor 7 is provided on the plurality of stays 6B, the fan motor 7 or the propeller is provided. Even if the fan 8 is subjected to stress in the direction of the fan rotation axis due to a collision accident or the like and the stays 6B are deformed, the fan motor 7 and the stays 6B do not directly contact or collide with the radiator 3 on the upstream side. Can prevent its damage. Even if the ring member 9 contacts or collides with the upstream radiator 3, the impact at the time of the collision can be dispersed in the circumferential direction of the ring member 9, so that it is difficult to damage each other.

  Further, as described above, since the ring member 9 is constituted by a cylindrical ring, the ventilation resistance by the ring member 9 can be minimized, pressure loss can be suppressed, and the circumference thereof can be made as much as possible. Can be long. This prevents an increase in blowing sound and fan motor input due to the provision of the ring member 9, and at the same time, by increasing the circumference of the ring member 9, the impact dispersion effect at the time of collision is enhanced, and the fan motor 7, stay 6 </ b> B, The radiator 3 or the like can be made more difficult to be damaged.

  Further, in the present embodiment, the fan rotation shaft 7A is provided to the plurality of stays 6B extending radially in the cylindrical ring member 9 having an outer diameter 1 to 1.5 times the outer diameter of the fan motor 7. Accordingly, the ring member 9 can be provided in a region where the wind speed is relatively small with respect to the wind speed distribution on the suction side of the propeller fan 8. Therefore, the influence on fan performance by providing the ring member 9 can be minimized.

  That is, if the ring member 9 is provided at a position exceeding 1.5 times the outer diameter of the fan motor 7, it is installed in a region where the wind speed is relatively large, and the ring member 9 itself is an obstacle to the air flow. This will reduce fan performance. Further, by providing the ring member 9 at a position relatively close to the fan motor 7 within a range not exceeding 1.5 times the outer diameter of the fan motor 7, a fan motor having a large weight while suppressing the influence on the fan performance. When an axial stress is applied to 7, the stress acting on the motor support stay 6 can be appropriately dispersed so that the stress acting on each stay 6 </ b> B (16 </ b> B, 26 </ b> B) does not become too large. Can do. On the other hand, when the ring member 9 is provided at a position smaller than 1 times the outer diameter of the fan motor 7, when the axial stress acts on the fan motor 7 and the ring member 9 contacts or collides with the radiator 3. Since the contact area of the ring member 9 with respect to the radiator 3 is small, the radiator 3 may be damaged. Accordingly, the ring member 9 is preferably provided with a ring having an outer diameter 1 to 1.5 times the outer diameter of the fan motor 7 concentrically with the fan rotation shaft 7A.

  In the present embodiment, the ring member 9 can be provided in contact with the downstream surface of the radiator 3 provided on the upstream side in advance. Thus, by providing the ring member 9 in contact with the downstream surface of the upstream radiator 3, even if the fan motor 7 or the propeller fan 8 is subjected to stress in the direction of the fan rotation axis due to a collision accident or the like, the ring member 9 The relative positional relationship between 9 and the radiator 3 does not change, and the possibility of collision between the two can be avoided. For this reason, mutual damage due to the impact at the time of collision can be prevented.

  In addition, this invention is not limited to the invention concerning the said embodiment, In the range which does not deviate from the summary, it can change suitably. For example, in the above embodiment, the CRFM 1 including both the capacitor 2 and the radiator 3 has been described. However, the vehicle cooling system including either the capacitor 2 or the radiator 3 or a general air conditioner other than for a vehicle is used. It can also be widely applied to refrigeration equipment, other fan units, cooling systems, and the like.

1 is an exploded perspective view of a vehicle cooling system (CRFM) including a fan unit according to a first embodiment of the present invention. It is a longitudinal cross-sectional view of the cooling system for vehicles shown in FIG. It is the perspective view which looked at the fan unit of the cooling system for vehicles shown in Drawing 1 from the radiator mounting part side. It is a longitudinal cross-sectional view of the cooling system for vehicles provided with the fan unit which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the cooling system for vehicles provided with the fan unit which concerns on 3rd Embodiment of this invention. It is the perspective view which looked at the fan unit which concerns on 4th Embodiment of this invention from the radiator mounting part side. It is a longitudinal cross-sectional view of the cooling system for vehicles provided with the fan unit which concerns on 5th Embodiment of this invention. It is the perspective view which looked at the fan unit of the cooling system for vehicles shown in Drawing 7 from the radiator mounting part side.

Explanation of symbols

1 Vehicle cooling system (CRFM)
2 Capacitor 3 Radiator 4 Fan unit 5 Shroud 5A Bell mouth 6 Motor support stay 6A Motor support portion 6B, 16B, 26B Stay 6C Downstream inner peripheral end portion 6D Outer end portion 7 Fan motor 7A Rotating shaft (fan rotating shaft)
8 Propeller fan 9 Ring member N Fan rotation direction T Stay fan rotation axis thickness t Stay cross section perpendicular to the fan rotation axis thickness

Claims (8)

A shroud having a bell mouth that guides air sucked through an upstream device to the fan side, a motor support stay provided in the shroud, a fan motor supported by the motor support stay, and a rotation shaft of the fan motor In a fan unit comprising a propeller fan attached to and rotated in the bell mouth,
The motor support stay is disposed upstream of the propeller fan, the fan motor is attached to the motor support stay, and the propeller fan is provided downstream of the motor support stay ;
The motor support stay has a plurality of radially provided stays, is integrally formed on the inner surface side of the shroud, and a downstream inner peripheral end portion of a coupling portion with the shroud is formed from an inner diameter of the bell mouth. The fan unit is also located on the fan rotation center side, and the outer end portion extending in the radial direction is inclined toward the upstream side .   A shroud having a bell mouth that guides air sucked through an upstream device to the fan side, a motor support stay provided in the shroud, a fan motor supported by the motor support stay, and a rotation shaft of the fan motor In a fan unit comprising a propeller fan attached to and rotated in the bell mouth,
  The motor support stay is disposed upstream of the propeller fan, the fan motor is attached to the motor support stay, and the propeller fan is provided downstream of the motor support stay;
  The motor support stay has a plurality of radially provided stays, is integrally formed on the inner surface side of the shroud, and a downstream inner peripheral end portion of a coupling portion with the shroud is formed from an inner diameter of the bell mouth. Is also located on the fan rotation center side, provided with a ring member projecting upstream from the stay and the fan motor,
  The fan unit, wherein the ring member is provided in contact with the upstream device.   The fan unit according to claim 2, wherein the ring member is a cylindrical ring.   The ring member has a diameter of 1 to 1.5 times the outer diameter of the fan motor, and is provided concentrically with the fan rotation shaft with respect to the plurality of stays extended in the radial direction. The fan unit according to claim 2 or 3, characterized in that Said plurality of stays are extended in the radial direction, according to any the outer end of claims 1, characterized in that it is integrally connected to the inner surface of the shroud bent downstream 4 Fan unit. It said plurality of stays, the thickness of the fan rotation axis direction according to any one of 5 claims 1, characterized in that it is larger than the thickness of the perpendicular cross section to the fan rotary shaft fan unit . The fan unit according to any one of claims 1 to 6, wherein the plurality of stays are inclined in the fan rotation direction on the outer end side extended in the radial direction. In a vehicle cooling system including a fan unit that ventilates outside air to a radiator for an engine and / or a condenser for an air conditioner mounted on an automobile and cools the radiator and / or the condenser.
A cooling system for a vehicle, wherein the fan unit according to any one of claims 1 to 7 is disposed downstream of the radiator and / or the condenser.

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