JP2010043550A - Impeller for cross flow fan, power supply device, and vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technology contributing reduction of manufacturing cost while maintaining performance as a cross flow fan at an appropriate level. <P>SOLUTION: This impeller for cross flow fan is disposed in a storing vessel storing an electricity accumulation part and a liquid heat exchange medium for exchanging heat with the electricity accumulation part, and agitates the heat exchange medium by rotating around a prescribed rotary shaft. The impeller includes a plurality of blade parts having at least three blades arranged in a rotary direction and formed in a flat plate shape, and a support member supporting the plurality of blade parts in such a manner that the same can rotate around the rotary shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cross-flow fan that is disposed inside a storage container and a storage container that stores a liquid heat exchange medium, and particularly relates to a structure of an impeller used for the cross-flow fan. is there.

  Conventionally, a cross flow fan used as a blower in the air is known (see, for example, Patent Document 1 and Patent Document 2) (see FIGS. 10 to 12).

The configuration of the conventional cross flow fan is excellent in blowing performance when used in air.
JP-A-6-173886 Japanese Patent Laid-Open No. 10-196484

  However, in the conventional cross flow fan, the blades used in the impeller have a curved surface shape, and the blades are arranged so as to be inclined with respect to the rotational radius direction of the cross flow fan. However, there is a problem that the impeller cannot be molded with a single mold (see, for example, FIG. 12).

  Furthermore, the conventional crossflow fan impeller needs to be assembled after being divided into a large number of parts and then processed by welding, caulking, etc., and there is a problem that the manufacturing cost is high (FIGS. 10 and 10). 11).

  In addition, the conventional cross flow fan is premised on stirring air, and when stirring a liquid heat exchange medium that performs heat exchange with the power storage unit, the stirring resistance becomes very high. There is also a problem that it is difficult to generate a cross flow (transverse flow) traversing the impeller.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a technique capable of contributing to reduction in manufacturing cost while maintaining the performance as a cross flow fan at an appropriate level. And

  In order to solve the problems described above, an impeller for a cross flow fan according to one aspect of the present invention is disposed inside a storage container that stores a power storage unit and a liquid heat exchange medium that performs heat exchange with the power storage unit. A cross-flow fan impeller that stirs the heat exchange medium by rotating about a predetermined rotation axis, wherein at least three blades are arranged in a rotation direction, and each has a plurality of blade portions formed in a flat plate shape. And a support member that supports the plurality of blade portions so as to be rotatable about the rotation axis.

  Thus, by making each blade part constituting the impeller into a plate shape instead of a curved shape, it is possible to improve the die-cutting property at the time of molding the impeller for the cross flow fan, and thus to improve the work efficiency. It can contribute to improvement and reduction of manufacturing cost.

  In general, a liquid heat exchange medium that exchanges heat with a power storage unit such as a battery has a higher viscosity than air or water, and has a large agitation load when agitating with an impeller for a crossflow fan. Further, in the cross flow fan, the heat exchange medium to be stirred is once taken into the inside of the impeller and then discharged to the outside of the impeller, but if there are too many blade parts constituting the impeller, As a result, the heat exchange medium is less likely to enter the impeller and the stirring efficiency (flow rate) as a cross flow fan is reduced. Therefore, in the impeller for a cross flow fan according to the present embodiment, while maintaining the stirring efficiency as a cross flow fan at an appropriate level (while sufficiently generating a cross flow (cross flow)), the minimum structure as a structure In order to maintain the ultimate strength, the structure has at least three blade portions.

  In the crossflow fan impeller having the above-described configuration, the number of the blade portions arranged in the rotation direction may be 7 or less. As in the embodiment of the present invention, when the number of blade portions constituting the impeller is, for example, 7 or less, it is possible to avoid a significant decrease in stirring efficiency as a cross flow fan.

  In the impeller for a cross flow fan configured as described above, each of the plurality of blade portions has a blade surface for stirring the heat exchange medium, and each blade surface is parallel to the rotational radius direction. It can be characterized by being arranged as follows. By adopting such a configuration for the inclination angle of the plurality of blade portions, it is possible to improve the die-cutting property when molding the impeller for the crossflow fan, and thus contribute to the improvement of work efficiency and the reduction of manufacturing costs. can do.

  In the impeller for a cross flow fan configured as described above, each of the plurality of blade portions has a blade surface for stirring the heat exchange medium, and each blade surface is a blade for the cross flow fan. The cross flow fan impeller may be arranged so as to incline at an angle greater than 0 degrees and smaller than 30 degrees with respect to the rotational radius direction of the vehicle.

  In the crossflow fan impeller having the above-described configuration, a plurality of blade portion groups including the plurality of blade portions are arranged in the rotation axis direction and formed to extend in the rotation axis direction, The blade part groups adjacent in the rotational axis direction may be connected by the support member. By adopting such a configuration, when the heat exchange medium is agitated by the blade portions set in a small number in consideration of the viscosity of the liquid heat exchange medium (that is, the impeller is configured by a small number of components. In the case of the case, the amount of deflection of each blade portion is obtained by reinforcing the blade portion with the support member (compared to the case where only the both ends of the blade portion are supported in the configuration in which the blade portion is not divided in the rotation axis direction). The amount of twist and the like can be suppressed, and the occurrence of defects due to the deformation of the blade portion can be avoided.

  In addition, a power supply device according to an aspect of the present invention includes a crossflow fan impeller configured as described above, the power storage unit, a storage container that stores the power storage unit, and the power storage unit in the storage container. And a liquid heat exchange medium accommodated therein.

  In the power supply device configured as described above, the liquid heat exchange medium may be an automatic transmission fluid (ATF).

  In addition, a vehicle according to one embodiment of the present invention can include the power supply device configured as described above.

  As described in detail above, according to the present invention, it is possible to provide a technique that can contribute to the reduction of manufacturing cost while maintaining the performance as a cross flow fan at an appropriate level.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing a schematic configuration of a power supply device B incorporating a cross flow fan equipped with an impeller for a cross flow fan according to an embodiment of the present invention, and FIG. It is an external appearance perspective view which shows the schematic structure of the impeller for crossflow fans by embodiment of this.

  In the power supply device B according to the embodiment of the present invention, an assembled battery including a plurality of cylindrical batteries (power storage units) 121 is used for driving a hybrid vehicle or as an auxiliary power source and is accommodated in the container 11. The accommodating container 11 accommodates a coolant (liquid heat exchange medium) 14 for cooling the assembled battery, and the assembled battery is immersed in the coolant 14. Specifically, for example, automatic transmission fluid (ATF) can be adopted as the cooling liquid 14 as the liquid heat exchange medium.

  A cross flow fan 900 is disposed inside the container 11. The cross flow fan 900 includes an impeller F and a motor M that rotationally drives the impeller F about a predetermined rotation axis. The cross flow fan 900 agitates the coolant 14 and cools the assembled battery by rotating the impeller F by the motor M.

  In FIG. 1, the flow of the coolant 14 that is stirred and circulated in the storage container 11 by the cross flow fan 900 is indicated by a thick arrow. In addition, here, the configuration in which the assembled battery is cooled by the liquid heat exchange medium has been described as an example. However, if necessary, the assembled battery is heated by the liquid heat exchange medium, and the performance of the assembled battery can be improved. Needless to say, it can also be maintained.

  Next, the configuration of the impeller for a cross flow fan according to the embodiment of the present invention will be described in detail. FIG. 3 is a cross-sectional view showing details of a blade portion (blade) constituting the impeller for a cross flow fan according to the first embodiment of the present invention. Note that FIG. 3 shows a view of a cross section in a later-described section L1 in the Y-axis direction.

  The crossflow fan impeller F in the present embodiment is arranged three by three in each of the sections L1, L2 and L3 divided into three in the rotation direction of the impeller (see FIGS. 2 and 3), Plural blade parts 111 to 113 (blade part group in section L1), 121 to 123 (blade part group in section L2), 131 to 133 (blade part group in section L3) each formed in a flat plate shape, and these And a support member that rotatably supports the plurality of blade portions around the rotation axis.

  Specifically, each blade portion in the present embodiment is formed in a flat plate shape extending in the rotation axis direction, and the end portions of each blade portion are connected in a predetermined positional relationship by connection portions 201, 202, 203, and 204.・ It is fixed. In the present embodiment, for example, the connection portions 202 and 203 correspond to portions that connect the blade portion groups in the support member.

  As shown in FIG. 2, the connecting portion 204 located on one end side of the crossflow fan impeller F is provided with a shaft portion 204 a that protrudes outward in the rotational axis direction. Further, a lid 301 can be attached to the outer end face of the connecting portion 201 located on the other end side of the crossflow fan impeller F, and the lid 301 has a cylinder protruding inward in the rotation axis direction. A shaped bearing portion 301a is formed.

  The impeller F for a cross flow fan according to the present embodiment is supported by the shaft portion 204a and the bearing portion 301a so as to be rotatable with respect to the container 11. The crossflow fan impeller F is rotationally driven by transmitting the rotational driving force of the motor M to at least one of the shaft portion 204a and the bearing portion 301a. The power transmission from the motor M to the crossflow fan impeller F can be realized by, for example, a power transmission mechanism via a gear train or a belt, or a power transmission mechanism directly connecting the motor M and the shaft portion 204a, for example. .

  Here, the fixing portion 201, the fixing portion 202, the fixing portion 203, the fixing portion 204, and the lid 301 cooperate to realize a function as a support member as a result. In addition, the structure of a supporting member should just be a structure which can support a some blade | wing part rotatably around a rotating shaft, and is not limited to the structure illustrated in this Embodiment.

  FIG. 4 is a table (20 ° C.) for comparing the viscosity of the coolant 14 (here, ATF is used) used in the power supply device B according to the first embodiment of the present invention with the viscosity of air or water. FIG. 5 is a graph showing the relationship between the number of blades arranged in the rotation direction in the crossflow fan impeller and the flow rate of the coolant 14 (the impeller having a diameter of 30 mm is 1200 rpm). The data when rotated by Note that the flow rate of the cooling liquid 14 shown in FIG. 5 is considered to correspond to one index related to the circulation efficiency of the cooling liquid 14 that is stirred by the impeller for the cross flow fan and circulates in the container 11.

  In general, a liquid heat exchange medium that exchanges heat with a power storage unit such as a battery has a higher viscosity than air or water, and has a large agitation load when agitating with an impeller for a crossflow fan. Further, in the cross flow fan, the heat exchange medium to be stirred is once taken into the inside of the impeller and then discharged to the outside of the impeller, but if there are too many blade parts constituting the impeller, This narrows the gap (inflow resistance increases), makes it difficult for the heat exchange medium to enter the impeller, and lowers the stirring efficiency (flow rate) as a cross flow fan. Therefore, the crossflow fan impeller according to the present embodiment has a configuration having at least three blade portions in order to maintain sufficient strength as a structure while maintaining the stirring efficiency as a crossflow fan at an appropriate level. Yes.

  Moreover, as shown in FIG. 5, when the number of blades is increased to 7 or more, it can be seen that the flow rate decreases. Therefore, in this embodiment, the number of blade portions constituting each of the sections L1 to L3 is at least 3 and not more than 7 to avoid a significant decrease in the stirring efficiency as a cross flow fan. To do.

  In addition, by adopting a configuration in which adjacent blade portions are connected by a connecting portion, the heat exchange medium is stirred by the blade portions set in a small number in consideration of the viscosity of the liquid heat exchange medium (that is, Even in the case where the impeller is configured with a small number of constituent members), by reinforcing the blade portion with the connecting portion (when supporting only both ends of the blade portion in a configuration in which the blade portion is not divided in the rotation axis direction) In comparison, the amount of deflection, the amount of twist, etc. of each blade part can be suppressed, and the occurrence of problems due to the deformation of the blade part can be avoided.

  Then, the manufacturing method of the impeller for crossflow fans by this Embodiment is demonstrated.

  FIG. 6 is a schematic view showing the relationship between the impeller for a cross flow fan according to the first embodiment of the present invention and a mold used for manufacturing the impeller for the cross flow fan.

  In the impeller F for crossflow fans according to the present embodiment, a plurality of blade portions constituting the impeller are configured on a flat plate. Thus, by making each blade part constituting the impeller into a plate shape instead of a curved shape, it is possible to improve the die-cutting property at the time of molding the impeller for the cross flow fan, and thus to improve the work efficiency. It can contribute to improvement and reduction of manufacturing cost.

  Specifically, in the present embodiment, the blade portion of the section L1 is molded by the molds D11, D12, D13, and D4, the blade section of the section L2 is molded by the molds D21, D22, D23, and D4, and the blade of the section L3 The part is molded by molds D31, D32, D33 and D4.

  Further, the plurality of blade portions in the cross flow fan 900 according to the present embodiment each have a blade surface for stirring the heat exchange medium, and each blade surface is arranged so as to be substantially parallel to the rotational radius direction. (See FIG. 3).

  By adopting such a configuration for the inclination angle of the plurality of blade portions, it is possible to improve the die-cutting property at the time of molding the impeller for the cross flow fan, thereby contributing to improvement of work efficiency and reduction of manufacturing costs. can do.

  FIG. 7 is a graph showing the relationship between the angle of the blade surface of the blade portion and the flow rate (data when an impeller having a diameter of 30 mm is rotated at 1200 rpm).

  Since the viscosity of the coolant 14 is much higher than that of air or water, the pressure applied to the blade surfaces of the blade portions during rotation of the impeller F for the crossflow fan is large. Therefore, as shown in the figure, sufficient agitation of the coolant 14 can be achieved and the flow rate can be maintained at a sufficient level even if the blade surfaces of the blade portions are substantially parallel to the rotational radius direction. Can do. In addition, the blade surface angle in FIG. 7 means the inclination angle with respect to the tangent of the circumscribed circle of the impeller.

  FIG. 8 is a graph showing the relationship between the manufacturing cost of a crossflow fan impeller according to an embodiment of the present invention and the manufacturing cost of a conventional crossflow fan impeller.

  As shown in the figure, since the crossflow fan impeller F according to the embodiment of the present invention can be molded with a single mold, the mold cost is reduced from the conventional general crossflow fan impeller. It can be reduced by about 30% compared to the case of manufacturing.

  In addition, since the crossflow fan impeller F according to the embodiment of the present invention does not require processes such as welding, fitting, and caulking, the manufacturing cost of the conventional general crossflow fan impeller is manufactured. About 30%.

  In addition, the crossflow fan impeller F according to the embodiment of the present invention does not require processes such as welding, fitting, and caulking, so that the choices of selectable materials (resins and the like) can be greatly increased.

  In addition, the crossflow fan impeller F according to the embodiment of the present invention has a very small number of three blade portions, so the volume of the blade portion is reduced and the material cost can be reduced by about 10%. it can.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  The second embodiment of the present invention is a modification of the above-described first embodiment, and the configuration of the blade portion is different between the present embodiment and the first embodiment. In the following, parts having the same functions as those already described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 9 is a cross-sectional view for explaining the configuration of a crossflow fan impeller F ′ according to the second embodiment of the present invention.

  The plurality of blade portions 111 ′ to 113 ′, 121 ′ to 123 ′, and 131 ′ to 133 ′ in the crossflow fan impeller F ′ according to the second embodiment of the present invention each stir the heat exchange medium. Each blade surface has an angle greater than 0 degrees and smaller than 30 degrees on the rotational direction side of the crossflow fan impeller with respect to the rotational radial direction of the crossflow fan impeller (See angle α in FIG. 9). In FIG. 9, as a representative, a cross section of the blade portions 111 ′ to 113 ′ arranged in a section corresponding to the section L <b> 1 in the first embodiment is shown.

  Thus, by arranging the plurality of blade portions to be inclined with respect to the rotational radius direction, it is possible to improve the stirring efficiency of the cooling liquid 14 and contribute to the improvement of the cooling capacity of the power storage unit in the power supply device. Can do.

  In addition, according to the present invention, it is possible to provide a vehicle including a power supply device that cools a power storage unit with a crossflow fan incorporating the impeller for a crossflow fan according to each of the above-described embodiments.

It is a longitudinal cross-sectional view which shows schematic structure of the power supply device B with which the crossflow fan provided with the impeller for crossflow fans by embodiment of this invention was incorporated. 1 is an external perspective view showing a schematic configuration of an impeller for a cross flow fan according to a first embodiment of the present invention. It is sectional drawing which shows the detail of the blade | wing part (blade) which comprises the impeller for crossflow fans by the 1st Embodiment of this invention. It is a table | surface for comparing the viscosity of the cooling fluid 14 used in the power supply device B by the 1st Embodiment of this invention with the viscosity of air or water. 6 is a graph showing the relationship between the number of blade portions arranged in the rotational direction and the flow rate of coolant 14 in a crossflow fan impeller. It is the schematic which shows the relationship between the type | mold used for manufacture of the impeller for crossflow fans by the 1st Embodiment of this invention, and the said impeller for crossflow fans. It is a graph which shows the relationship between the angle of the blade | wing surface of a blade | wing part, and a flow volume. It is a graph which shows the relationship between the manufacturing cost of the impeller for crossflow fans by embodiment of this invention, and the manufacturing cost of the conventional impeller for crossflow fans. Sectional drawing for demonstrating the structure of the impeller F 'for crossflow fans by the 2nd Embodiment of this invention. It is a figure for demonstrating the structure of the conventional crossflow fan. It is a figure for demonstrating the structure of the conventional crossflow fan. It is a figure for demonstrating the structure of the conventional crossflow fan.

Explanation of symbols

B power supply device, 900 cross flow fan, M motor, F, F ′ impeller for cross flow fan, 11 receiving container, 14 coolant, 111-113, 121-123, 131-133 blade, 201-204 connection .

Claims (8)

A blade for a cross flow fan that is disposed inside a storage container that houses a power storage unit and a liquid heat exchange medium that exchanges heat with the power storage unit, and that stirs the heat exchange medium by rotating about a predetermined rotation axis A car,
A plurality of blade portions arranged in a flat plate shape, at least three in the rotational direction;
A support member that rotatably supports the plurality of blade portions around the rotation axis;
An impeller for a cross-flow fan.   The impeller for a cross flow fan according to claim 1, wherein the number of the blade portions arranged in the rotation direction is seven or less.   The plurality of blade portions each have a blade surface for stirring the heat exchange medium, and each blade surface is arranged so as to be parallel to the rotational radius direction. Impeller for cross flow fan.   Each of the plurality of blade portions has a blade surface for stirring the heat exchange medium, and each blade surface is a blade for the cross flow fan with respect to a rotational radial direction of the impeller for the cross flow fan. The impeller for a crossflow fan according to claim 1 or 2, wherein the impeller is arranged so as to be inclined at an angle larger than 0 degrees and smaller than 30 degrees toward the rotation direction of the vehicle. A plurality of blade portions composed of the plurality of blade portions are arranged in a plurality of sets in the rotation axis direction and are formed to extend in the rotation axis direction,
The impeller for a cross flow fan according to any one of claims 1 to 4, wherein blade groups adjacent to each other in the rotation axis direction are connected by the support member. An impeller for a cross flow fan according to any one of claims 1 to 5,
The power storage unit;
A storage container for storing the power storage unit;
A liquid heat exchange medium housed together with the power storage unit in the container;
A power supply device comprising:   The power supply device according to claim 6, wherein the liquid heat exchange medium is an automatic transmission fluid.   A vehicle comprising the power supply device according to claim 6.

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