JP2010209849A - Cross-flow fan and method of manufacturing the cross-flow fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cross-flow fan with reduced effects on blowing capacity of the cross-flow fan even when an assembling error occurs and to provide a method of manufacturing the cross-flow fan suppressed in contact between a member holding a first impeller and blade parts formed on a second impeller when holding the first impeller and mounting it on the second impeller. <P>SOLUTION: In the cross-flow fan, on a main surface 225A of the impeller, blade part formation regions 150, 152 having a plurality of blade parts 224, and blade part receiving regions 151, 153 positioned at portions adjacent to the blade part formation regions 150, 152 out of the main surface 225A and in which tip ends of a plurality of blade parts of another impeller are disposed, are formed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  More particularly, the present invention relates to a cross-flow fan formed by stacking a plurality of impellers and a method for manufacturing the cross-flow fan.

  Conventionally, air conditioner indoor fans have been proposed that have been devised for the purpose of reducing noise and increasing efficiency.

  For example, a cross flow fan described in Japanese Patent Application Laid-Open No. 7-91391 is formed in a ring shape, a supporting member having a predetermined number of half blades disposed on both side surfaces, and a predetermined number of half on one side surface. The number of blades is arranged, and a disk-shaped end plate having a rotating shaft is provided. Of the support member, a hole having the same shape as the wing is formed in a portion located between the wings, and a similar hole is also formed in a portion located between the wings in the end plate. And the support member is arrange | positioned between end plates and the crossflow fan is constructed | assembled.

  Furthermore, the cylindrical impeller described in Japanese Patent Application Laid-Open No. 2002-266788 includes a first impeller member and a second impeller member, and the first impeller member and the second impeller member include a support disk, A plurality of blades extending in a cylindrical shape in parallel with each other in a direction substantially perpendicular to the main surface with the main surface of the support disk as a base end. Each support disk has a joint where the tip of the blade of the other impeller member is joined between the base ends of the main surface.

  And the blade formed on the first impeller member is formed so as to taper from the first impeller member toward the second impeller member, and the blade formed on the second impeller member is It is formed so as to taper from the second impeller member toward the first impeller member.

JP-A-7-91391 JP 2002-266788 A

  In the crossflow fan described in Japanese Patent Laid-Open No. 7-91391, the blades formed on the end plate are tapered toward the support member. Similarly, the wing | blade formed in the supporting member is formed in the taper shape toward the end plate.

  Therefore, in this cross flow fan, the blades tapered from the end plate toward the support member and the blades tapered from the end plate toward the support member are alternately arranged in the circumferential direction. become.

  Here, the blades tapered from the end plate toward the support member are formed on the end plate, and the blades formed thick from the end plate toward the support member are formed on the support member. For this reason, when the support member and the end plate are fixed at positions shifted in the circumferential direction, all the intervals between the tapered blade and the thick blade are shifted.

  Further, when constructing the cross flow fan, the blades formed on the support member are placed in the first or second position while holding the support member and the first or second end plate and bringing one of them close to the other. The wings formed in the first or second end plate are mounted in the holes formed in the support member, while being mounted in the holes formed in the end plate.

  Here, as a method of holding the end plate, a first pressing member that presses radially inward across a plurality of wings formed on the end plate, and a position opposite to the wing that the first pressing member presses are positioned. A method of holding the first end plate using a second pressing member that presses the plurality of blades to be radially inward is conceivable.

  In this manner, the end plate is brought close to the support member while the end plate is held by the first and second pressing members. At this time, the blades formed on the end plate enter between the blades formed on the support member, and the blades formed on the support member enter between the blades formed on the end plate.

  For this reason, in the process of bringing the end plate close to the support member, the first and second pressing members extending between the plurality of blades may come into contact with the blade formed on the support member. When the first and second pressing members come into contact with the wing formed on the support member, the wing may be deformed. At the same time, when the blade is attached to the hole, if there is contact between the pressing member and the blade, it is difficult to perform alignment in the circumferential direction due to their mutual interference. There is also a risk of lowering. In particular, due to the difficulty of alignment in the circumferential direction, even a slight error can greatly affect the performance of the fan, and the positional relationship between adjacent blades (interblade distance) may not be machined with sufficient accuracy. There is also. In particular, when the blades extended from different support members are alternately arranged in the circumferential direction as in the art, this effect becomes more remarkable.

  Also in the cylindrical impeller described in Japanese Patent Application Laid-Open No. 2002-266788, a blade tapered from a first impeller member to a second impeller member and a blade that is tapered are provided in the circumferential direction. They will be arranged alternately.

  Then, when the first impeller member and the second impeller member are fixed in a state shifted in the circumferential direction, a blade tapered from the first impeller member toward the second impeller member, All the gaps with the selected blade will be shifted.

  For this reason, in this cylindrical impeller, if an assembly error occurs between the first and second impeller members, the air blowing performance of the cylindrical impeller is significantly reduced.

  Here, when laminating the first impeller member and the second impeller member, for example, the first impeller member is held in proximity to the second impeller member while the first impeller member is held. And welding to the second impeller member.

  As a method for holding the first impeller member, for example, a first pressing member that presses a plurality of blades formed on the first impeller member inward in the radial direction, and a blade that the first pressing member presses. A method of holding the first impeller member using a second pressing member that presses a plurality of blades positioned on the opposite side to the inner side in the radial direction is conceivable.

  As described above, when the first impeller member is brought close to the support member while the first impeller member is held, the blades formed on the support member are interposed between the blades formed on the first impeller member. Get in. For this reason, the 1st and 2nd press member and the blade | wing formed in the support member contact, and the case where a blade | wing deform | transforms arises.

  The present invention has been made in view of the above-described problems, and a first object of the present invention is to achieve a flow-through in which the influence on the blowing performance of the flow-through fan is reduced even if an assembly error occurs. Is to provide fans.

  The second object of the present invention is to hold the first impeller and attach the second impeller to a member for holding the first impeller and a blade portion formed on the second impeller. It is an object of the present invention to provide a cross-flow fan manufacturing method in which contact is suppressed.

  In one aspect, the cross-flow fan according to the present invention is provided on the main surface of the support portion with a main surface and at a distance from the main surface of the support portion, and is provided continuously to the support portion so as to stand from the main surface. It is formed by laminating a plurality of impellers including a plurality of impeller parts in the central axis direction, and connecting a tip part of the impeller blade part and a support part of another impeller adjacent to the impeller. A cross-flow fan. The impeller includes a first impeller and a second impeller adjacent to the first impeller, and a blade formation in which a plurality of blade portions are provided on a main surface of a support portion of the first impeller. A region and a blade receiving region that is located in a portion of the main surface adjacent to the blade forming region and in which the tip portions of the plurality of blade portions of the second impeller are installed.

  Preferably, the blade forming region is located at a distance in the rotation direction with respect to the first blade forming region and the first blade forming region, and is opposite to the first blade forming region with respect to the central axis. And a second blade forming region located. Further, the blade receiving region is positioned with a first blade receiving region located between the first and second blade forming regions and spaced apart in the rotational direction with respect to the first blade receiving region, with respect to the central axis. A second blade receiving area located on the opposite side of the first blade receiving area.

  Preferably, the first intersecting angle between the virtual plane perpendicular to the central axis and the outer peripheral portion on the radially outer side of the blade portion is set between the virtual plane and the inner peripheral portion on the radially inner side of the blade portion. It approximates 90 degrees rather than the second intersection angle.

  Preferably, the number of blade portions formed in the blade forming region of the first impeller and the number of blade portions of the second impeller inserted in the blade receiving region of the first impeller are equal or one Is increased by one or two for the other.

  In another aspect, the cross-flow fan according to the present invention is provided on the main surface of the support portion having a main surface with a space between the support portion and connected to the support portion so as to stand from the main surface. A plurality of impellers including a plurality of impellers are stacked in the central axis direction, and the tip of the impeller of the first impeller is connected to the support of the second impeller adjacent to the first impeller. It is a once-through fan formed by this. Further, the main surface of the support portion of the first impeller is located on a portion adjacent to the blade forming region among the three or more blade forming regions in which a plurality of blade portions are provided, and the second surface. Three or more blade receiving areas in which the tip portions of the plurality of blade portions of the vehicle are installed are formed.

  Preferably, a plurality of the blade forming regions are provided apart from each other by the same angle about the central axis of the cross-flow fan, and the blade receiving regions are respectively positioned between the plurality of blade forming regions. .

  A cross-flow fan manufacturing method according to the present invention includes a support portion having a main surface, and a plurality of support portions that are provided on the main surface of the support portion with a space therebetween and are provided to the support portion so as to stand up from the main surface A flow-through formed by stacking a plurality of impellers including an impeller in the direction of the central axis, and connecting the tip of the impeller impeller to the support of another impeller adjacent to the impeller It is a manufacturing method of a fan. And the 1st blade | wing formation area | region in which the several blade | wing part is provided in the main surface of the said support part, and it is located in the rotation direction with respect to a 1st blade | wing formation area, and is located in the 1st blade | wing with respect to a central axis. Preparing a first impeller in which a second blade forming region located on the opposite side of the forming region and first and second blade receiving regions located between the first and second blade forming regions are formed; A third blade forming region in which a plurality of blade portions are provided on the main surface of the support portion, and a third blade forming region that is positioned with a spacing in the rotational direction with respect to the third blade forming region, with respect to the central axis. A step of preparing a second impeller in which a fourth blade forming region located on the opposite side and a third and fourth blade receiving region located between the third and fourth blade forming regions are formed; First pressing the blade portion of the second impeller formed in the forming region toward the inside in the radial direction A step of holding the second impeller by pressing the material and pressing the second pressing member with the blade portion of the second impeller formed in the fourth blade forming region directed radially inward; While the second impeller is held by the first and second pressing members, the tip of the blade portion of the second impeller formed in the third blade formation region is installed in the first blade receiving region, and the fourth And a step of installing the tip of the blade portion of the second impeller formed in the blade forming region in the second blade receiving region.

  According to the cross-flow fan according to the present invention, even if the first impeller and the second impeller are displaced in the circumferential direction, it is possible to reduce the influence on the blowing performance. According to the cross-flow fan manufacturing method of the present invention, the contact between the holding member that holds the first impeller and the blade member formed on the second impeller can be suppressed, and the blade portion is damaged and deformed. Etc., and the ease of work at the time of manufacture and the assembly accuracy can be improved.

It is sectional drawing which shows typically the air conditioner 100 provided with the crossflow fan 200 which concerns on Embodiment 1 of this invention. It is a perspective view of cross-flow fan 200 concerning Embodiment 1 of the present invention. FIG. 3 is an exploded perspective view of the cross-flow fan 200 shown in FIG. 2. It is a perspective view of the impeller 226. It is a top view of the impeller 226. FIG. It is a top view of the blade | wing part 224. FIG. It is a perspective view which shows the assembly process of the crossflow fan 200 which concerns on Embodiment 1 of this invention. It is a top view which shows the 1st modification of the impeller 226 of the crossflow fan 200 which concerns on this Embodiment 1. FIG. It is a top view which shows the 2nd modification of the impeller 226 of the crossflow fan 200 which concerns on this Embodiment 1. FIG. It is a perspective view of cross-flow fan 200 concerning Embodiment 2 of the present invention. It is a disassembled perspective view of the crossflow fan 200 which concerns on Embodiment 2 of this invention. It is a perspective view of the impeller 226. It is a top view of the impeller 226 shown by FIG. It is a top view of the blade | wing part 224 which showed the blade | wing part 224 and the structure of the vicinity, and planarly viewed from the rotation centerline O direction. FIG. 4 is a diagram showing a relative positional relationship between a first reference surface 300 and a second reference surface 301. The first center line CL1 of the first reference plane 300 and the second center line CL2 of the second reference plane 301 are matched, and the first center point CP1 of the first reference plane 300 and the second center of the second reference plane 301 are set. It is a top view when making point CP2 correspond with the rotation centerline O direction. It is sectional drawing in the XVII-XVII line of FIG. It is sectional drawing in the XVIII-XVIII line shown in FIG. It is a graph which shows the result of having measured the vibration produced by attaching and driving the conventional once-through fan and the once-through fan of this embodiment in the same case. FIG. 6 is a perspective view showing an assembly process of the once-through fan 200.

  A cross-flow fan 200 according to the present invention and an air conditioner 100 including the cross-flow fan 200 will be described with reference to FIGS. 1 to 20.

(Embodiment 1)
FIG. 1 is a cross-sectional view schematically showing an air conditioner 100 including a cross-flow fan 200 according to Embodiment 1 of the present invention. As shown in FIG. 1, the air conditioner 100 is provided with a cross-flow fan 200 that is rotatable about a rotation center line O, a casing 102 that houses the cross-flow fan 200, and the casing 102. A plurality of heat exchangers 110 are provided.

  The casing 102 is formed with a slit portion at any one of the top surface, the front surface, and the side surface so that the outside air can be introduced into the casing 102 when the cross-flow fan 200 is driven. As a result, indoor air is sucked from the slit portion. The sucked indoor air is heat-exchanged by the heat exchanger 110, and then forcibly blown out by the cross-flow fan 200 through the air guide path 131 and the outlet provided in the casing 102 into the room.

  An upper wall portion 132 and a lower wall portion 133 are provided in the casing 102, and an air guide path 131 is defined by the upper wall portion 132 and the lower wall portion 133. The blowout port is formed at the end of the air guide path 131. The upper wall portion 132 and the lower wall portion 133 are both positioned below the rotation center line O, while the upper wall portion 132 is positioned above the lower wall portion 133. The lower wall portion 133 extends from the lower side of the cross-flow fan 200 to the back side with respect to the cross-flow fan 200 and is formed so as to reach above the rotation center line O.

  The upper wall portion 132 extends from the front side of the casing 102 toward the cross-flow fan 200 and reaches the vicinity of the cross-flow fan 200. Further, a tongue 130 is formed at the end of the upper wall 132 on the crossflow fan 200 side.

  Of the space located around the cross-flow fan 200, a region extending from the tongue 130 to the front side in the rotation direction R and reaching the upper end of the lower wall 133 is a supply region 135 for supplying air into the cross-flow fan 200. ing. On the other hand, a region extending from the upper end portion of the lower wall portion 133 to the front side in the rotation direction R and reaching the tongue portion 130 is a blowout region 136 for blowing air from the cross-flow fan 200 to the air guide path 131. And the tongue part 130 is adjoining to the crossflow fan 200, and has divided the blowing area | region 136 and the supply area | region 135. As shown in FIG.

  The air outlet is provided with a wind direction plate 120 for freely changing the direction of the airflow sent from the air outlet.

  FIG. 2 is a perspective view of the cross-flow fan 200. As shown in FIG. 2, the cross-flow fan 200 is formed by stacking a plurality of impellers 226 on the rotation center line O. The support plates 222 and 223 located at both ends of the cross flow fan 200 in the rotation center line O direction are supported by the support plates 222 and 223 so that the cross flow fan 200 can be attached to the casing 102 of the air conditioner 100. Either a shaft portion projecting from 223 or a bearing portion that receives a shaft portion projecting from the casing 102 or a fan motor (not shown) for rotationally driving the fan is provided.

  FIG. 3 is an exploded perspective view of the cross-flow fan 200 shown in FIG. In FIG. 3, some of the impellers 226 are omitted for easy understanding of the disassembled configuration of the cross-flow fan 200. As shown in FIG. 3, the cross-flow fan 200 is configured by stacking an end impeller 228, a plurality of impellers 226, and an end impeller 229.

  The end impeller 228 includes a support plate 223 and a plurality of blade portions 224 formed on one main surface of the support plate 223, and the end impeller 229 includes one of the support plate 222 and the support plate 222. And a plurality of blade portions 224 formed on the main surface.

  The impeller 226 includes a support plate 225 formed in an annular shape and a plurality of blade portions 224 formed on both main surfaces of the support plate 225.

  A plurality of impellers 226 are stacked between the end impeller 228 and the end impeller 229.

  FIG. 4 is a perspective view of the impeller 226, and FIG. 5 is a plan view of the impeller 226. 4, the impeller 226 includes a support plate 225, a plurality of blade portions 224 formed on the main surface 225A of the support plate 225, and a plurality of main surfaces 225B located on the opposite side of the main surface 225A. And a blade portion 224.

  As shown in FIG. 5, on the main surface 225 </ b> A, blade portion forming regions 150 and 152 in which a plurality of blade portions 224 are formed at predetermined intervals, and other blade wheels adjacent to the blade wheel 226. The blade portion receiving areas 151 and 153 for receiving the blade portion 224 formed on the H.226 are formed.

  The blade portion forming region 150 and the blade portion forming region 152 are formed to be spaced apart from each other in the circumferential direction. The blade portion forming region 150 and the blade portion forming region 152 are, for example, rotationally symmetric about the rotation axis. In such a way, they are positioned so as to face each other across the rotation center line O.

  The blade receiving region 151 and the blade receiving region 153 are also formed at intervals in the circumferential direction, and the blade receiving region 151 and the blade receiving region 153 are, for example, rotationally symmetric about the rotation axis. Are positioned so as to face each other across the rotation center line O.

  Thus, on the main surface 225A, the plurality of blade portion forming regions 150 and 152 and the plurality of blade portion receiving regions 151 and 153 are alternately arranged in the rotation direction of the cross-flow fan 200.

  As shown in FIG. 4, a plurality of blade portions 224 are formed in a portion of the main surface 225 </ b> B located on the back side of the blade portion receiving regions 151 and 153 formed on the main surface 225 </ b> A. It is said that. As a result, two blade portion formation regions are formed on the main surface 225B with an interval in the rotation direction, and the blade portion formation regions are, for example, rotational centerlines O to each other so as to be rotationally symmetric with respect to the rotation axis. It is located so as to face each other.

  Further, in the main surface 225B, a blade portion receiving region for receiving the blade portion 224 of the other impeller 226 is formed in a portion of the main surface 225A located on the back side of the blade portion forming regions 150 and 152. As a result, the blade surface receiving areas are formed on the main surface 225B at intervals in the rotation direction, and the rotation centerlines O are mutually aligned such that the blade formation areas are, for example, rotationally symmetric about the rotation axis. It is opposed across the.

  The blade portion forming regions 150 and 152 formed on the main surface 225A and the blade portion receiving region formed on the main surface 225B are opposed to each other in the direction of the rotation center line O, and the blade portion receiving formed on the main surface 225A. The regions 151 and 153 and the blade portion forming region formed on the main surface 225B are formed so as to face each other in the direction of the rotation center line O. For this reason, a blade part is formed only on one main surface over substantially the entire circumference of the support plate 225, and the rigidity of the support plate 225 is made uniform.

  The number of blade portions 224 provided in the blade portion forming regions 150 and 151 of the main surface 225A is equal to the number of blade portions 224 provided in the blade portion forming regions of the main surface 225B, or one is relative to the other. One or two more. That is, the number of blade portions 224 formed on the main surface 225A and the number of blade portions 224 provided on the main surface 225B match or approximate.

  Here, each blade | wing part 224 is formed so that it may taper as it leaves | separates from main surface 225A and main surface 225B.

  For this reason, in the constructed cross-flow fan 200 state, between each support plate 225, the number of blade portions 224 tapered from the end impeller 228 side to the end impeller 229 side, and the end blades The number of blade portions 224 that are tapered from the wheel 228 side toward the end impeller 229 side substantially matches. For this reason, in the assembled once-through fan 200, it is possible to suppress variation in the blowing efficiency between the support plates 225, and the blowing efficiency extends from the end impeller 228 side to the end impeller 229 side. Can be made uniform.

  Here, the impeller 226 is formed by injection molding, the blade portion 224 and the support plate 225 are formed integrally with each other, and the root portion of the blade portion 224 is connected to the blade portion 224. And the front-end | tip part of the blade | wing part 224 is adhere | attached and fixed to the support plate 225 of the other impeller 226 adjacent to the impeller 226 in which the said blade | wing part 224 was formed, for example by ultrasonic pressure bonding.

  An injection mold for molding the impeller 226 includes an extrusion pin that pushes out the impeller 226 molded in the cavity.

  This push pin presses the blade receiving areas 151 and 153 as shown by the broken lines in FIG. Two pressing pins are provided corresponding to the blade receiving region 151 and the blade receiving region 153, and are formed to extend in the circumferential direction.

  Here, for example, in an injection mold for molding an impeller 226 in which the same number of blade portions 224 as the blade portions 224 shown in FIG. A plurality of small pressing pins are required to press the portion located between the blade portions 224. On the other hand, in the injection mold for molding the impeller 226 of the cross-flow fan 200 according to the present invention, the number of pressing pins is reduced, and the configuration of the injection mold is simplified.

  FIG. 6 is a plan view of the blade portion 224. In FIG. 6, a cross section at the root portion of the blade portion 224 is a first reference surface 300, and an end surface at the tip portion of the blade portion 224 is a second reference surface 301. In addition, in the base part of the blade | wing part 224, what is called build-up of root R etc. is normally given for reinforcement, However, In the definition of the 1st reference plane 300 here, the cross section of this so-called build-up part is excluded. . The definition of the second reference surface 301 is a cross section at a position corresponding to the bonding surface on the support plate side when the impellers are bonded to each other.

  The centers of the cross sections of the blade portions 224 perpendicular to the rotation center line O are arranged on a virtual axis extending perpendicular to the main surfaces 225A and 225B. The cross-sectional area of each cross section of the blade portion 224 perpendicular to the rotation center line O decreases as the distance from the main surfaces 225A and 225B increases. As shown in FIG. 6, the distance between the outer peripheral edge of the first reference surface 300 and the outer peripheral edge of the second reference surface 301 is constant.

  An example of a method for manufacturing the cross-flow fan 200 configured as described above will be described with reference to FIG. The end impeller 228 is mounted on a mounting table, for example. Then, the impeller 226 is prepared, and the impeller 226 is disposed above the end impeller 228 in a state where the impeller 226 is held by the pressing pad 250 and the pressing pad 251.

  The pressing pad 250 presses the plurality of blade portions 224 formed in the blade portion forming region 150 of the main surface 225A inward in the radial direction, and the pressing pad 251 has the blade portion forming region 152 on the main surface 225A. The plurality of blade portions 224 formed in the above are pressed inward in the radial direction. Thereby, the impeller 226 is held by the pressing pad 250 and the pressing pad 251.

  Thereafter, the impeller 226 and the end impeller 228 are brought close to each other. And the blade | wing part 224 formed in the edge part impeller 228 is inserted in the blade | wing part acceptance area | region provided in the main surface 225B of the impeller 226. FIG.

  After one impeller 226 is stacked on the end impeller 228, another impeller 226 is further stacked.

  At this time, the newly stacked impeller 226 is also held by the pressing pad 250 and the pressing pad 251 and conveyed above the already stacked impeller 226.

  Then, a new impeller 226 is brought close to the already stacked impeller 226, and the tip of the blade portion 224 of the new impeller 226 is in contact with the blade portion receiving areas 151, 153 of the already stacked impeller 226. Installed.

  At this time, the pressing pads 250 and 251 holding the already stacked impellers 226 press the plurality of blade portions 224 formed in the blade portion forming regions 150 and 151 from the outer peripheral side. For this reason, it is suppressed that the blade | wing part 224 of the impeller 226 newly laminated | stacked and the press pad 250,251 holding the impeller 226 already laminated | stacked interfere. For this reason, it can suppress that each blade | wing part 224 deform | transforms or is damaged.

  The order in which the impeller 226, the end impeller 228, and the end impeller 229 are stacked is not limited to the above example.

  Here, the already stacked impeller 226 and the newly stacked impeller 226 may be fixed in a state in which they are relatively rotated in the circumferential direction.

  In such a case, out of the blade portions 224 formed in the blade portion formation region of the already-stacked impeller 226, the blade portion 224 located at the end and the blade portion of the impeller 226 newly stacked. An interval between the blade portions 224 formed in the formation regions 150 and 152 is narrower or wider than a predetermined interval.

  In cross-flow fan 200 according to the present embodiment, two blade portion forming regions and two blade portion receiving regions are formed on one main surface, and therefore there are four intervals between blade portions 224, and a predetermined interval. It will be out of the interval.

  On the other hand, for example, in the cross-flow fan in which the blade portions 224 of the impeller 226 newly stacked between the blade portions of the already stacked impellers 226 are inserted and the impellers 226 are sequentially stacked, The space | interval of the blade | wing part 224 will shift | deviate from a predetermined space | interval.

  For this reason, according to the cross-flow fan 200 and the manufacturing method of the cross-flow fan 200 according to the present embodiment, the accuracy required when positioning the impellers 226 can be suppressed, and the production efficiency can be improved. In addition, the yield can be improved.

  Then, after a plurality of impellers 226 and end impellers 229 are sequentially stacked, the cross-flow fan 200 is assembled by joining the tip portions of the respective vane portions 224 and the support plate 225.

  In the embodiment described above, the blade forming area is divided into the number of blades that is approximately one-fourth of the number of the entire circumference, but the installation accuracy of the interval between the blades 224 is shown. However, the present invention is not limited to this when the stability of holding the impeller in the laminating process is important. For example, as shown in FIG. 8, the blade portion forming region may be approximately one sixth of the total number of the circumferences. Moreover, as shown in FIG. 9, you may make it about 1/8 at a time, and if it is a grade which can ensure the area of the press surface at the time of hold | maintaining the impeller 226, you may divide | segment more finely. In any case, as described above, when the blade portion forming region is arranged so as to be, for example, rotationally symmetric with respect to the rotation axis of the cross-flow fan 200, the arrangement of the pressing surface is substantially uniform in the circumferential direction. Therefore, it is more preferable for holding the impeller. Here, when it is set to about one-fourth as in the above embodiment, the pressing surface can be kept to the necessary minimum reduction, and the manufacturing process can be simplified, but about one-sixth and about eight minutes. By increasing the number of divisions, such as one by one, the number of pressing surfaces can be increased and the impeller 226 can be held at more points from the surroundings, so that it can be held more stably and the cross-flow fan 200 can be assembled. The accuracy can be further improved. Note that the blade portion formation region does not necessarily have to be provided at a rotationally symmetrical position accurately, and at the same time, it is not always necessary to equally divide the number of blades on the entire circumference, so that the purpose of holding from the periphery is achieved. The number may be slightly different.

(Embodiment 2)
A cross-flow fan 200 according to Embodiment 2 of the present invention will be described with reference to FIGS. 10 to 19. Of the configurations shown in FIGS. 10 to 19, the same or corresponding components as those shown in FIGS. 1 to 9 may be denoted by the same reference numerals and description thereof may be omitted. .

  10 is a perspective view of cross-flow fan 200 according to Embodiment 2 of the present invention, and FIG. 11 is an exploded perspective view of cross-flow fan 200 shown in FIG. As shown in FIGS. 10 and 11, the cross-flow fan 200 according to the second embodiment is similar to the cross-flow fan 200 according to the first embodiment in that the end impeller 228, the plurality of impellers 226, and the end It is configured by stacking with an impeller 229.

  FIG. 12 is a perspective view of the impeller 226 constituting the cross-flow fan 200 according to the second embodiment, and FIG. 13 is a plan view of the impeller 226 shown in FIG.

As shown in FIGS. 12 and 13, the impeller 226 of the cross-flow fan 200 according to the second embodiment is also formed on the main surface 225 </ b> B and the blade portion formation regions 150 and 152 formed on the main surface 225 </ b> A. The blade receiving area faces the rotation center line O direction, and the blade receiving areas 151 and 153 formed on the main surface 225A and the blade formation area formed on the main surface 225B extend in the rotation center line O direction. It is formed so as to face each other. Each blade portion 224 is formed to be tapered as it is away from the main surface 225A and the main surface 225B.

  On the other hand, the number of blade portions 224 formed on the main surface 225A and the number of blade portions 224 provided on the main surface 225B match or approximate each other. It is possible to suppress variation in the air blowing efficiency between the 225 and uniform air blowing efficiency from the end impeller 228 side to the end impeller 229 side.

  FIG. 14 is a plan view of the blade portion 224 showing the blade portion 224 and the structure in the vicinity thereof, as viewed in plan from the direction of the rotation center line O. As shown in FIG. 14, the blade portion 224 is formed in a generally arcuate shape, and is curved toward the front side in the rotational direction R from the radially inner side toward the radially outer side. Yes.

  In FIG. 14, among the cross sections of the blade portion 224 perpendicular to the rotation center line O, the cross section at the root portion of the blade portion 224 is taken as a first reference plane 300. Further, the end surface at the tip of the blade portion 224 is referred to as a second reference surface 301.

  In addition, in the base part of the blade | wing part 224, what is called build-up of root R etc. is normally given for reinforcement, However, In the definition of the 1st reference plane 300 here, the cross section of this so-called build-up part is excluded. . The definition of the second reference surface 301 is a cross section at a position corresponding to the bonding surface on the support plate side when the impellers are bonded to each other. Therefore, even when the end of the blade tip is not a plane parallel to a plane perpendicular to the rotation center axis O, the blade tip cross-section corresponding to the support plate side adhesive surface is represented by the second reference plane. Can be thought of as

  FIG. 15 is a diagram illustrating a relative positional relationship between the first reference surface 300 and the second reference surface 301. In FIG. 15, the first center line CL <b> 1 is the center line (camber line) of the first reference plane 300, and the first center line CL <b> 1 is a line segment having the same distance from both sides of the first reference plane 300. is there.

  The points where the outer peripheral edge portion of the first reference surface 300 and the first center line CL1 intersect are defined as an outer end portion Q1 and an inner end portion Q3, and the outer end portion Q1 is radially outward of the first reference surface 300. The inner end portion Q3 is located on the radially inner side. Further, a point located on the first center line CL1 and having the same distance from the outer end portion Q1 and the inner end portion Q3 is defined as a first center point CP1 of the first reference plane 300.

  Similarly, the second center line CL2 is a center line (camber line) of the second reference plane 301, and the second center line CL2 is a line segment having the same distance from both sides of the second reference plane 301. The points where the outer peripheral edge of the second reference surface 301 intersects the second center line CL2 are defined as the outer end Q2 and the inner end Q4, and the outer end Q2 is radially outward of the second reference surface 301. The inner end portion Q4 is located on the radially inner side. Furthermore, a point located on the second center line CL2 and having the same distance from the outer end portion Q2 and the inner end portion Q4 is defined as a second center point CP2 of the second reference plane 301.

  Here, the second reference plane 301 is separated from the first reference plane 300 in the direction of the rotation center line O, and the second reference plane 301 is positioned in front of the first reference plane 300 in the rotation direction R. The support plate 225 is located on the radially outer side.

  Specifically, the second reference plane 301 is shifted from the first reference plane 300 by the rotation angle θ1 about the rotation center line O, and the second reference plane 301 has a diameter with respect to the first reference plane 300. The outer peripheral side movement amount L4 is shifted outward in the direction.

  The rotation angle θ1 is a first imaginary axis D1 connecting the outer end Q1 of the first reference plane 300 and the rotation center line O, and a second imaginary axis connecting the outer end Q2 of the second reference plane 301 and the rotation center line O. And D2. The rotation angle θ1 is a smaller intersection angle among the intersection angles defined by the first virtual axis D1 and the second virtual axis D2.

  The method for defining the rotation angle θ1 is not limited to the above. For example, it can be defined by the intersection angle between the first chord line D3 of the first reference plane 300 and the second chord line D4 of the second reference plane 301. Here, the first chord line D3 is an imaginary line passing through the outer end portion Q1 and the outer end portion Q2, and the second chord line D4 is an imaginary line passing through the outer end portion Q2 and the inner end portion Q4.

  The outer peripheral side movement amount L4 is a radial direction between a virtual circle S1 passing through the first center point CP1 around the rotation center line O and a virtual circle S2 passing through the second center point CP2 around the rotation center line O. It can be defined by the outer peripheral side movement amount L4.

  In FIG. 16, the first center line CL1 of the first reference plane 300 and the second center line CL2 of the second reference plane 301 are matched, and the first center point CP1 of the first reference plane 300 and the second reference line 300 are matched. FIG. 10 is a plan view when the second center point CP2 of the surface 301 is made to coincide with the rotation center line O direction.

  In FIG. 16, the distance between the outer peripheral edge of the second reference surface 301 and the outer peripheral edge of the first reference surface 300 is formed to be constant, and this distance is defined as a reduction amount L3.

  Thus, the area of the second reference surface 301 is smaller than that of the first reference surface 300, and the blade portion 224 has a cross section perpendicular to the rotation center line O from the root portion side to the tip portion side. The cross section is formed to be small.

  As described above, the blade portion 224 is formed so that the cross-sectional area of the blade portion 224 perpendicular to the rotation center line O decreases from the first reference surface 300 toward the second reference surface 301. The center of the cross section of the blade portion 224 perpendicular to the line O is the front side in the rotation direction R and the outer side in the radial direction around the rotation center line O as it goes from the first reference plane 300 to the second reference plane 301. It is formed to be displaced toward

  FIG. 17 is a cross-sectional view taken along line XVII-XVII in FIG. 14, and is a cross-sectional view passing through the first center line CL1 and the second center line CL2. In FIG. 17, it is defined by the inner peripheral side portion 310 of the blade portion 224 passing through the inner end portion Q3 and the inner end portion Q4 and the main surface of the support plate 225 (virtual plane perpendicular to the rotation center line O). The intersection angle to be performed is defined as an intersection angle θ2. When the intersection angle with the outer peripheral side portion 311 of the blade portion 224 passing through the outer end portion Q1 and the outer end portion Q2 is the intersection angle θ3, the intersection angle θ2 is smaller than the intersection angle θ3. In other words, the intersection angle θ3 is closer to 90 degrees than the intersection angle θ2.

  In the present embodiment, the inner peripheral side portion 310 is inclined radially outward as it is away from the main surface of the support plate 225, and the outer peripheral side portion 311 is formed on the support plate 225. As it is away from the main surface, it is inclined toward the radially inward side. Here, the outer peripheral side portion 311 does not necessarily have to be inclined toward the radially inner side, and may be inclined toward the radially outer side depending on circumstances. Even in this case, the specified position of the intersection angle θ3 is the same. However, if the outer peripheral side 311 is inclined toward the radially inward side, the mold becomes simple because there is no so-called under part at the time of molding, and the radially outward side is directed toward the radially outward side. It is more preferable than being inclined.

  The radial distance L1 between the inner end Q3 of the first reference plane 300 and the inner end Q4 of the second reference plane 301 is the distance between the outer end Q1 of the first reference plane 300 and the second reference plane 301. It is longer than the distance L2 between the outer end Q2.

  In the example shown in FIG. 17, the inner peripheral side portion 310 and the outer peripheral side portion 311 are formed in a straight line shape, but are not limited thereto, and may be formed in a curved shape.

  In this case, at the position where the height from the main surface of the support plate 225 is the same, the intersection angle between the tangent of the inner peripheral side portion 310 and the virtual plane perpendicular to the rotation center line O is the tangent of the outer peripheral side portion 311. And the angle of intersection with the virtual plane perpendicular to the rotation center line O is smaller.

  18 is a cross-sectional view taken along line XVIII-XVIII shown in FIG. 14. As shown in FIG. 18 and FIG. 9, the second center point CP2 of the second reference plane 301 is the same as that of the first reference plane 300. It is located on the front side in the rotational direction R with respect to the first center point CP1 and on the radially outward side.

  And as it goes from the root side of the blade portion 224 to the tip portion of the blade portion 224, the center of the cross section of the blade portion 224 perpendicular to each rotation center line O is displaced to the front side in the rotation direction R and radially outward. Displace to the side. Accordingly, the center line P passing through the center of each cross section of the blade portion 224 also moves toward the front side in the rotational direction R and toward the radially outer side as it goes from the root portion side to the tip portion side of the blade portion 224. Tilt.

  By setting the shape of the blade portion 224 as described above, the side surface of each blade can be biased to the outer peripheral side, so when removing the molded product of the impeller 226 while rotating the mold, the blade portion The surface pressure applied to the inner side in the radial direction of 224 can be kept low. Thereby, when taking out a molded product from a metal mold | die, it can suppress that a crack and a crack generate | occur | produce in the blade | wing part 224 radial inside especially easy to produce a crack.

  In the example shown in FIGS. 10 to 18, each blade portion 224 is formed so as to incline toward the front side in the rotational direction R as it moves away from the support plate 225. You may form so that it may incline to the side.

  Further, even if the cross-flow fan 200 having the blade portion 224 formed as described above and the tongue portion 130 shown in FIG. 1 are arranged so as to be parallel to each other, a protrusion, a concave portion or an inclined portion is formed on the tongue portion 130. Since it is possible to suppress abnormal sounds (buzzing sounds) and peak sounds (nZ sounds) to a sufficient level for use as described below without the need to add a device such as, etc., the structure of the casing 102 can be simplified. Can do.

  The impeller 226 including a plurality of the blade portions 224 as described above is formed by an injection molding machine formed so that the inner surface of the cavity extends along the outer peripheral surfaces of the blade portions 224 and the impeller 226. .

Table 1 below shows a cross-flow fan in which the blade portion has a rotation angle θ1 of 0 (deg) and an outer peripheral side movement amount L4 of 0 (mm), and has a blade portion free from skew and having no radial deviation. based on the air volume (m ³ / min), indicating the amount of change in air volume (m ³ / min) of the cross-flow fan 200 having different various parameters.

  In the table below, L: blade length (mm) (height H shown in FIG. 17), e: taper reduction (mm) (L3 shown in FIG. 16), w: blade root to blade tip Blade cross-sectional rotation angle (deg) (rotation angle θ1 in FIG. 15) r: The outer peripheral side movement amount (mm) of the blade cross section from the blade root to the blade tip (outer peripheral side movement amount L4 in FIG. 15).

  Since the airflow of the cross-flow fan (cross flow fan) 200 is proportional to the fan diameter, length, and rotation speed, + and-in the table indicate the fan diameter, length, and rotation. The result is the same as this data regardless of the number.

  From Table 1 above, it can be seen that the air volume is larger than that of the reference cross-flow fan when W / L is 0.15 or less and r / e is 0.3 or more and 1.5 or less.

  As shown in Table 1, r / e is such that as the value approaches 1.0, the outer edge of the blade becomes parallel to the rotation axis, the air volume increases, and if the value becomes too large, the angle with the rotation axis It can be seen that the air volume changes in a decreasing direction.

  Furthermore, it can be seen from Table 1 that w / L basically has a tendency to decrease the air volume as the value increases. Unlike the above-described conventional cross-flow fan, there is no r (the outer peripheral side movement amount (mm) of the blade cross section from the blade root to the blade tip) (the outer peripheral side movement amount L4 in FIG. 14), and w (the blade root to the blade tip). It can be seen that the air volume tends to decrease when only the rotation angle (deg) (rotation angle θ1 in FIG. 15) of the blade cross section is changed.

  FIG. 19 shows a case in which a conventional cross-flow fan employing a blade portion free from skew and having no radial deviation and the cross-flow fan of the present embodiment are mounted in the same case and driven. It is a graph which shows the result of having measured the vibration of a body. In FIG. 19, ▪ represents a conventional cross-flow fan, and Δ represents a cross-flow fan 200 according to the present embodiment. The horizontal axis indicates the rotational speed (rpm) of the fan, and the vertical axis indicates the amplitude of vibration generated in the housing.

  As shown in FIG. 19, the cross-flow fan 200 according to the present embodiment can suppress the vibration generated in the housing about 30% lower than the conventional cross-flow fan at the same rotational speed. Recognize. In addition, at the same amplitude (vibration), the recirculation fan 200 according to the present embodiment can set the rotational speed higher than that of the conventional cross-flow fan, and thus can increase the air volume.

  Even when the cross-flow fan 200 according to the second embodiment is assembled, as shown in FIG. 20, the impellers 226 and the end impellers 228 are used with the impellers 226 using the pressing pads 250 and 251. Are sequentially laminated. Thereby, in the assembly process, it is suppressed that each impeller 226 and the blade | wing part 224 formed in the edge part impeller 228 contact each other.

  Although the embodiment of the present invention has been described above, it should be considered that the embodiment disclosed this time is illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims. Furthermore, the above numerical values are examples, and are not limited to the above numerical values and ranges.

  The present invention can be applied to a once-through fan, a blower, and an impeller molding machine, and is particularly suitable for a once-through fan formed by stacking a plurality of impellers, a blower including the once-through fan, and an impeller molding machine. is there.

  100 air conditioner, 102 casing, 110 heat exchanger, 120 wind direction plate, 130 tongue, 200 cross-flow fan, 222,223 support plate, 224 blade, 225 support plate, 226 impeller, 227 gap, 300,301 Surface, 310 inner peripheral side, 311 outer peripheral side, CL1, CL2 center line, CP1, CP2, center point, D1, D2 virtual axis, D3, D4 chord line, e distance, L1 distance, L2 distance, L3 reduction amount, L4 outer peripheral side movement amount, O rotation center line, P center line, Q1, Q2 outer end, Q3, Q4 inner end, R rotation direction, r distance, S1, S2 virtual circle, W rotation angle, θ1 rotation angle, θ2, θ3 crossing angle.

Claims (8)

An impeller that includes a support portion having a main surface and a plurality of blade portions that are provided on the main surface of the support portion at a distance from each other and that are connected to the support portion so as to stand from the main surface. Is a cross-flow fan formed by stacking a plurality of blades in the central axis direction and connecting the tip of the blade portion of the first impeller and the support portion of the second impeller adjacent to the first impeller. And
The main surface of the support portion of the first impeller is located on a blade forming region in which a plurality of the blade portions are provided, and a portion of the main surface adjacent to the blade forming region, and the second blade A once-through fan in which a blade receiving region in which tip ends of a plurality of blade portions of a vehicle are installed is formed. The blade formation region is located at a first blade formation region, spaced apart from the first blade formation region in the rotational direction, and is located on the opposite side of the first blade formation region with respect to the central axis. Including two blade formation regions,
The blade receiving region is located between the first blade receiving region located between the first and second blade forming regions, and between the first and second blade forming regions, and the first axis with respect to the central axis. The cross-flow fan according to claim 1, comprising a second blade receiving region located on the opposite side of the blade receiving region. The cross-flow fan includes a third impeller located on the opposite side of the second impeller with respect to the first impeller,
The main surface of the support portion includes a first main surface and a second main surface located on the opposite side of the first main surface,
The first main surface is formed with the first and second blade formation regions and the first and second blade receiving regions,
The second main surface has a third blade formation region, and is spaced from the third blade formation region in the rotational direction, and is opposite to the third blade formation region with respect to the central axis. The fourth blade forming region is located, the third blade receiving region where the tip of the blade portion formed on the third impeller is installed, and the third blade receiving region spaced apart in the rotational direction. A fourth blade receiving region located on the opposite side of the third blade receiving region with respect to the central axis,
The first and second blade formation regions and the third and fourth blade receiving regions are opposed to the central axis direction,
The cross-flow fan according to claim 2, wherein the first and second blade receiving regions and the third and fourth blade forming regions face each other in the central axis direction.   The first intersecting angle between the virtual plane perpendicular to the central axis and the outer peripheral portion on the radially outer side of the blade portion is between the virtual plane and the inner peripheral portion on the radially inner side of the blade portion. The once-through fan according to any one of claims 1 to 3, wherein the crossflow fan approximates 90 degrees with respect to the second crossing angle.   The number of blade portions formed in the blade forming region of the first impeller and the number of blade portions of the second impeller inserted into the blade receiving region of the first impeller, or The cross-flow fan according to any one of claims 1 to 4, wherein one is increased by one or two with respect to the other. An impeller that includes a support portion having a main surface and a plurality of blade portions that are provided on the main surface of the support portion at a distance from each other and that are connected to the support portion so as to stand from the main surface. Is a cross-flow fan formed by stacking a plurality of blades in the central axis direction and connecting the tip of the blade portion of the first impeller and the support portion of the second impeller adjacent to the first impeller. And
The main surface of the support portion of the first impeller is located in a portion adjacent to the blade forming region of three or more blade forming regions provided with a plurality of the blade portions, and the main surface, A once-through fan in which three or more blade receiving areas in which tips of a plurality of blade portions of the second impeller are installed are formed. A plurality of the blade forming regions are provided apart from each other by the same angle around the central axis of the cross-flow fan,
The cross-flow fan according to claim 6, wherein the blade receiving area is located between the plurality of blade forming areas. An impeller that includes a support portion having a main surface and a plurality of blade portions that are provided on the main surface of the support portion at a distance from each other and that are connected to the support portion so as to stand from the main surface. Are stacked in the direction of the central axis, and a cross-flow fan manufacturing method is formed by connecting a tip portion of a blade portion of the impeller and the support portion of another impeller adjacent to the impeller. There,
A first blade forming region in which a plurality of the blade portions are provided on the main surface of the support portion, and the first blade forming region spaced apart in the rotational direction with respect to the first blade forming region, the first axis with respect to the central axis A first impeller is prepared in which a second blade forming region located on the opposite side of the one blade forming region and first and second blade receiving regions located between the first and second blade forming regions are formed. Process,
A third blade forming region in which a plurality of the blade portions are provided on the main surface of the support portion, and a space in the rotational direction with respect to the third blade forming region, and the first blade forming region with respect to the central axis. A second impeller having a fourth blade forming region located on the opposite side of the three blade forming region and a third and fourth blade receiving region located between the third and fourth blade forming regions is prepared. Process,
The first pressing member presses the blade portion of the second impeller formed in the third blade forming region radially inward and the second blade formed in the fourth blade forming region. A step of holding the second impeller by the second pressing member pressing the vane portion of the car inward in the radial direction;
In the state where the second impeller is held by the first and second pressing members, the tip of the blade portion of the second impeller formed in the third blade forming region is moved to the first blade receiving region. And installing the tip of the blade part of the second impeller formed in the fourth blade forming region in the second blade receiving region,
A method for manufacturing a cross-flow fan.

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