JP6499815B1 - Air conditioner - Google Patents

Abstract

The flow loss of a cross flow fan is increased by increasing the flow rate of air flow at a side end of the cross flow fan. An air conditioner is provided with a cross flow fan that blows air that has passed through a heat exchanger and a heat exchanger to a blower outlet in a cabinet in which a suction port and a blower outlet are formed, and the heat exchanger A heat exchanger is provided above and in front of the cross flow fan so that air that has passed through the heat exchanger from above and forward of the air flows into the cross flow fan, and air flows to the side of the cross flow fan. A cover member is provided to cover the side edge of the cross flow fan so as to suppress the cover member. The turbulence in the air passage on the suction side can be effectively suppressed. [Selection] Figure 9

Description

  The present invention relates to an air conditioner using a cross flow fan for blowing air during an air conditioning operation.

  In an indoor unit of an air conditioner, hot air or cold air is blown out from a blower outlet of a cabinet by driving a cross flow fan. In the cross flow fan, the pressure of gas is generally increased by rotating a blade. Although pressure loss occurs when the sucked air passes through the inside of the cabinet, a desired air volume is ensured by increasing the pressure of the air circulating by the cross flow fan.

  By the way, a support shaft projects from the side surface of the cross flow fan in the axial direction, and the support shaft is rotatably supported by the cabinet. A boss is provided on the other side surface of the cross flow fan, the motor shaft of the motor is fitted into the shaft hole of the boss, and the motor shaft is fixed to the boss. There are shafts on both the left and right sides of the cross flow fan, and the space with the shaft is a portion without blades. A pressure difference is generated between the part where the blade is present and the part where the blade is not present, and air that is not subjected to heat exchange near both ends of the cross flow fan is sucked. When this air touches the cold air that has passed through the heat exchanger, dew is produced.

  In order to prevent such condensation, Patent Document 1 provides a rectifying member that covers the end face of the crossflow fan. The rectifying member is formed so as to overlap the end surface of the cross flow fan from the air passage side wall. Thereby, the air which flowed in from the shaft hole of the air passage side wall does not flow to the upstream side of the cross flow fan but is rectified and flows toward the blower outlet side.

Japanese Patent No. 4006703

  By the way, an attempt has been made to increase the air flow rate by increasing the fan diameter of the cross flow fan. As the fan diameter of the cross flow fan increases, the flow rate of air increases, but the static pressure decreases. Furthermore, when the flow path volume of the air passage extending from the suction port to the blowout port is increased, the air flow is relatively easily disturbed. For this reason, the intended air flow cannot be generated, and air blow loss and reverse suction phenomenon such as forced vortex disturbance are caused.

  An object of this invention is to provide the air conditioner which can improve the ventilation loss in the side end of a crossflow fan.

An air conditioner according to the present invention is an air conditioner in which a cross flow fan for blowing air that has passed through a heat exchanger and the heat exchanger to the air outlet is provided in a cabinet in which an air inlet and an air outlet are formed. The heat exchanger is provided above and in front of the cross flow fan so that air that has passed through the heat exchanger from above and front of the heat exchanger flows into the cross flow fan, A cover member is provided to cover a side end of the cross flow fan so as to suppress air from flowing to the side of the cross flow fan, and the cover member extends inward in the fan axial direction on the suction side of the cross flow fan. Is formed to be larger than the protruding width of the blowout side of the cross flow fan.

  According to the present invention, since the cover member that covers the side edge of the cross flow fan is provided so as to suppress the flow of air through the side of the cross flow fan, the air is prevented from flowing through the side of the cross flow fan. It is possible to suppress the air turbulence even on the side of the air passage extending from the inlet to the outlet. Moreover, the cover member is formed such that the protruding width inward in the axial direction of the fan on the suction side of the crossflow fan is larger than the protruding width on the blowout side of the crossflow fan. Inflow can be suppressed as much as possible, and turbulence in the air passage on the suction side can be effectively suppressed.

It is a perspective view of the indoor unit of the air conditioner which is the 1st Embodiment of this invention. It is sectional drawing of an indoor unit. It is sectional drawing of the cabinet with which the crossflow fan was mounted | worn, and an expanded sectional view of the side end of a crossflow fan. It is a front view of the state which removed the front panel of the cabinet, the heat exchanger in a cabinet, the cross flow fan, and the electronic component of a side part. FIG. 5 is a perspective view of FIG. 4. FIG. 5 is a side view of FIG. 4. It is AA sectional drawing of FIG. It is a principal part disassembled perspective view which shows the state which decomposed | disassembled the cover member of FIG. It is a principal part expansion disassembled perspective view which shows the outline of the cover member of FIG. It is sectional drawing which shows the mating surface of the cover structural member by the side of a guide wall, and the cover structural member by the side wall. It is a principal part expansion disassembled perspective view which shows the relationship between the cover member which is 2nd Embodiment, and a gap covering piece. It is a principal part expansion disassembled perspective view which shows the relationship between the cover member which is 3rd Embodiment, and a gap covering piece.

  The indoor unit of the air conditioner which concerns on this embodiment is shown in FIGS. The indoor unit includes a heat exchanger 1 and a cross flow fan 2, which are housed in a cabinet 3. A suction port 4 is formed on the upper surface of the cabinet 3, and an air outlet 5 is formed on the lower portion of the front surface of the cabinet 3.

  An air passage 6 extending from the inlet 4 to the outlet 5 is formed inside the cabinet 3. The heat exchanger 1 is disposed in the air passage 6, and the cross flow fan 2 is disposed on the downstream side of the heat exchanger 1 in the air blowing direction. A filter 7 is disposed between the suction port 4 and the heat exchanger 1. The filter 7 removes dust from indoor air sucked from the suction port 4. An air guide panel 8 is provided at the air outlet 5 so as to be openable and closable.

  The cabinet 3 includes a back plate 10 and a front panel 11, and the front panel 11 is detachably attached to the back plate 10. The front panel 11 is formed in a box shape with the back side opened. A front cover 11a is attached to the upper side from the middle part of the front surface of the front panel 11 so as to be freely opened and closed. A space for sucking room air is also formed between the lower end of the front cover 11a and the front panel 11. An opening serving as the air outlet 5 is formed in the lower portion of the front panel 11.

The heat exchanger 1 and the cross flow fan 2 are attached to the back plate 10. A guide wall 12 that forms a part of the rear guide of the air passage 6 is formed in a curved surface on the front side of the back plate 10. A drain pan unit 13 that receives drain water dripping from the heat exchanger 1 is mounted on the front side of the back plate 10. The drain pan unit 13 is disposed below the heat exchanger 1 and ahead of the cross flow fan 2. The drain pan unit 13 is formed in a cylindrical shape. A tray for receiving drain water dripped from the heat exchanger is formed on the upper surface of the drain pan unit. An air passage 6 is formed by the cylindrical hollow portion of the drain pan unit 13, the guide wall 12 of the back plate 10, and the left and right side walls 16 of the back plate 10. The cross flow fan 2 is located between the drain pan unit 13 and the guide wall 12 of the back plate 10.

  The cross flow fan 2 is formed by connecting a plurality of impellers arranged in the axial direction. A large number of blades 2a are arranged radially on the outer periphery of each impeller. A boss is attached to an end plate on one side in the axial direction of the cross flow fan 2. The support shaft 15 protrudes from the end plate on the other side of the cross flow fan 2.

  The back plate 10 is formed with a pair of left and right side walls 16 that constitute the left and right wall surfaces of the air passage 6. Cover members 30 surrounding the side edges of the cross flow fan 2 are provided on the left and right side walls 16 so that air does not flow through the side of the cross flow fan 2. The cover member 30 is arrange | positioned at the left-right side edge of the crossflow fan 2, respectively, and supports the crossflow fan 2 rotatably.

  As shown in FIG. 3, the motor 20 accommodated in the motor case 19 is disposed outside the cover member 30 on one side. A motor shaft 21 protrudes from the motor case 19. The motor shaft 21 passes through the cover member 30 on one side and is fitted into the boss of the cross flow fan 2, and the motor shaft 21 is fixed to the boss. A bearing 18 is provided at the axial end of the cover member 30 on the other side, and the support shaft 15 of the cross flow fan 2 is rotatably supported.

  The cover member 30 surrounds the side end of the cross flow fan 2 in the axial direction, and supports the cross flow fan 2 in a rotatable manner. Therefore, the cover member 30 is disposed so as to protrude outward in the axial direction of the cross flow fan 2 from the side wall 16 and surround the side end of the cross flow fan 2. In the present embodiment, the cover member 30 projects further inward in the axial direction of the cross flow fan 2 than the side wall 16 and surrounds the cross flow fan 2 so that air does not flow to the side of the cross flow fan 2.

  The cover member 30 has an enclosure width that protrudes inward in the axial direction of the crossflow fan 2 from the side wall 16 so that the enclosure width inward of the crossflow fan 2 on the suction side of the crossflow fan 2 is crossflow. A width D is formed larger than the enclosure width on the blow-out side of the fan. Thereby, it is possible to prevent the air that has undergone heat exchange and flows into the suction side of the cross flow fan 2 from flowing toward the axial end portion of the cross flow fan 2. The width D may be a dimension that prevents the heat-exchanged air from flowing to the end side of the cross flow fan 2 and prevents the air flow on the suction side from being disturbed.

  By the way, as shown in FIG. 2, the front side gap between the cross flow fan 2 and the stabilizer 32 (refer FIG. 2) located in the front side, the cross flow fan 2, and the guide wall 12 located in the back side, A rear side gap d2 (a front side gap is also d2) is provided. The gap d2 and the cover member 30 are arranged such that the gap d1 between the cross flow fan 2 and the inner surface of the cover member 30 surrounding the gap d2 is narrower than the front gap and the rear gap d2. Thus, the diameter dimension of the cover member 30 is set. That is, the gap d1 between the cover member 30 and the outer periphery of the cross flow fan 2 is formed small so that the air flowing through the air passage 6 does not enter the gap as much as possible.

  Further, the air flowing through the air passage 6 is prevented from flowing to the suction side of the cover member 30 in the vicinity of both axial ends of the cross flow fan 2 of the air passage 6 extending from the suction port 4 to the blower outlet 5 in the cabinet. Gap covering pieces 35 and 36 are provided to cover the front-side gap and the rear-side gap d2 in the vicinity of both axial ends of the crossflow fan 2.

  Of the gap cover pieces 35, 36, the rear side gap cover piece 35 is integrally formed on the guide wall 12 side, and the tip thereof is close to or in contact with the cover member 30. Thus, the air on the suction side of the cross flow fan 2 is prevented from flowing to the end side of the cloflow fan 2 by the gap cover piece 35 on the rear side. The front-side gap covering piece 36 is integrally formed with the surrounding portion of the side wall 16 in the cover member 30 and covers the front-side gap. This prevents the heat-exchanged air from flowing into the front gap at the axial end of the cross flow fan 2.

  The cover member 30 can be formed by dividing it into several components in the circumferential direction. In the present embodiment, a single cover member 30 is formed by gathering together a plurality of constituent members forming the air passage 6.

  FIG. 9 is a schematic view showing that a cover member is composed of a plurality of cover constituent members. A bearing portion for supporting the cross flow fan 2 is omitted. By the way, in this embodiment, the air passage 6 is formed using the left and right side walls 16 in the cabinet, the rear guide wall 12, and the drain pan unit 13 with the stabilizer 32. Therefore, an example in which a cover component member is integrally formed on the side wall 16, the guide wall 12, and the drain pan unit 13 as the cover member 30 will be described.

  That is, the cover member 30 of this embodiment is composed of a plurality of cover constituent members 37, 38, 39 divided in the circumferential direction. That is, the cover member 30 is formed in a cylindrical shape by combining the cover constituent member 37 on the guide wall 12 side, the cover constituent member 38 on the drain pan unit side, and the cover constituent member 39 on the side wall 16 side.

  In FIG. 9, each cover structural member 37,38,39 is formed in circular arc shape. The cover-constituting member 37 on the guide wall side is formed in an arc shape, and a side plate 43 is integrally formed at the outer end in the axial direction of the cross flow fan 2. A bearing 18 (not shown) is attached to the side plate 43. The cover member 37 on the guide wall side is formed with a vertical surface 41 on the side of the air passage 6 that serves as the left and right side walls of the air passage 6. Therefore, the vertical surface 41, the cover component member 37, and the side plate 43 are integrally formed on the guide wall 12, and the gap covering piece 35 is integrally formed.

  The cover constituting member 38 on the drain pan unit 13 side is formed in an arc shape, and a side plate 44 is integrally formed at the outer end in the axial direction of the cross flow fan 2. A bearing 18 (not shown) is attached to the side plate 44. The cover constituting member 38 on the side of the drain pan unit 13 is formed with vertical surfaces 42 serving as left and right side walls of the air passage 6 on the air passage 6 side. Therefore, the vertical surface 42, the cover constituting member 38 and the side plate 44 are integrally formed in the drain pan unit 13.

The cover constituent member 39 on the side wall 16 side is formed in a semicircular arc shape, and a side plate 45 is integrally formed at the outer end in the axial direction of the cross flow fan 2. A bearing 18 (not shown) is attached to the side plate 45. In the cover component 39 on the side wall 16 side, the side wall 16 forms the side wall of the air passage 6. The cover constituting member 39 on the side wall 16 side has a gap covering piece 36 integrally formed on the front side thereof. Further, the cover component 39 on the side wall 16 side is formed so that the enclosure width inward in the fan axial direction of the enclosure is formed to be larger by the width D than the enclosure width on the blowing side of the crossflow fan. In FIG. 5, the rear side gap covering piece 35 overlaps with the protruding width D. Therefore, a notch 47 is formed by a protrusion width D (see FIG. 9) on the rear side of the cover constituent member 39 on the side wall 16 side to avoid overlapping with the gap covering piece 35.

  As shown in FIG. 10, the cover constituent members 37, 38, and 39 of the cover constituent members 37, 38, and 39 are arranged so that the cover constituent member 37 on the guide wall 12 side Polymerization is performed so as to be located on the inner side in the axial direction. The back plate 10 of the cabinet is formed so as to be structurally robust, such as being attached to an indoor wall surface. Therefore, the guide wall 12 formed on the back plate 10 has a more stable structure than other members. Therefore, if the other cover constituent members 38 and 39 are regulated by the cover constituent member 37 on the guide wall side among the plurality of cover constituent members, the other cover constituent members 38 and 39 become cross-flow fans due to warpage or the like. The risk of approaching or touching can be avoided.

  Thus, the cover member 30 surrounding the side end of the cross flow fan 2 is formed by using a plurality of members that form the air passage 6 such as the side wall 16, the drain pan unit 13, and the guide wall 12. By covering the side end of the cross flow fan 2 with the cover member 30, it is possible to avoid the air in the air passage 6 from entering the enclosure as much as possible, and to prevent air flow disturbance on the side of the cross flow fan 2. can do.

  In the above configuration, when the cross flow fan 2 is driven, the air that has passed through the heat exchanger 1 and exchanged heat passes through the air passage 6 and is blown into the room through the air outlet 5. On both the left and right sides of the cross flow fan 2, both ends in the axial direction of the cross flow fan 2 are surrounded by a cylindrical cover member 30, and the gap between the enclosure and the cross flow fan 2 is guided by the cross flow fan 2. Since it is smaller than the rear gap between the wall 12 and the front gap between the cross flow fan 2 and the stabilizer 13, it suppresses the flow of air through the side of the cross flow fan 2 and blows out the air from the suction port. The air turbulence can be reduced also on the side of the air passage leading to the air.

  Moreover, the cover member 30 has an enclosure width inward in the fan axial direction on the suction side of the cross flow fan 2 (projection width toward the air passage side) and an enclosure width on the blow side of the cross flow fan 2 (projection toward the air passage side). Therefore, turbulence in the air passage on the suction side can be effectively suppressed. Therefore, the airflow loss of the crossflow fan 2 can be reduced, and the performance of the crossflow fan 2 can be fully exhibited.

  FIG. 11 shows a second embodiment. This example relates to the arrangement of the front side gap covering piece 36. Specifically, the front side gap covering piece 36 is disposed on the drain pan unit side. The front side gap covering piece 36 is formed on the side portion of the drain pan so as to cover the side portion of the air passage 6 and the rear end thereof is in contact with the cover constituting member 39.

  In the second embodiment, an example is shown in which the front side gap covering piece 36 is formed on the drain pan unit 13 side, unlike the first embodiment in which the front side gap covering piece 36 is formed on the cover constituting member of the side wall 16. Since other configurations are the same as those of the first embodiment, the description thereof is omitted.

  FIG. 12 shows a third embodiment. This example relates to the arrangement of the rear side gap covering piece 35. In this example, unlike the first embodiment, the rear side gap covering piece 35 is integrally formed with the side wall side cover constituting member 39. The cover component 39 on the side wall 16 side is a part larger than the basic arcuate enclosure by the enclosure width D protruding toward the air passage, and the rear end functions as a gap cover piece 35. The cover constituent member 39 is integrally formed with an inclined shape different from the arc shape of the basic enclosure so that the rear end 35 a contacts the guide wall 12. Since other configurations are the same as those of the first embodiment, the description thereof is omitted.

  Also in this configuration, on both the left and right sides of the crossflow fan 2, both ends in the axial direction of the crossflow fan 2 are surrounded by the cylindrical cover member 30, and the clearance between the enclosure and the crossflow fan 2 is not crossed. Since it is smaller than the rear gap between the flow fan 2 and the guide wall 12 and the front gap between the cross flow fan 2 and the stabilizer 13, it suppresses the air from flowing through the side of the cross flow fan 2, Air turbulence can also be reduced at the side of the air passage extending from the suction port to the air outlet.

Moreover, the cover member 30 has an enclosure width inward in the fan axial direction on the suction side of the cross flow fan 2 (projection width toward the air passage side) and an enclosure width on the blow side of the cross flow fan 2 (projection toward the air passage side). Therefore, turbulence in the air passage on the suction side can be effectively suppressed. Further, the gap covering pieces 35, 36 provide a ventilation passage 6.
The internal air can be prevented from flowing to the left and right sides of the cross flow fan 2. Therefore, the airflow loss of the crossflow fan 2 can be reduced, and the performance of the crossflow fan 2 can be fully exhibited.

  9, 11, and 12, the arrangement of the gap cover pieces 35 and 36 has been described. However, the present invention is not limited to these examples. In FIG. 12, the front side gap cover piece 36 is provided on the drain pan unit 13 side. It may be adopted.

  As described above, as an aspect of the present invention, the heat exchanger 1 and the cross flow fan 2 that blows the air that has passed through the heat exchanger 1 to the air outlet 5 are provided in the cabinet in which the air inlet and the air outlet are formed. And a cover member 30 surrounding the side end of the cross flow fan 2 so that air does not flow through the side of the cross flow fan 2. It is possible to adopt an aspect in which the enclosure width inward in the fan axial direction on the side is formed larger than the enclosure width on the blowing side of the cross flow fan.

  According to the above configuration, since the cover member 30 surrounding the side end of the cross flow fan 2 is provided so that air does not flow through the side of the cross flow fan 2, the air flows through the side of the cross flow fan 2. And back flow from the outlet side can also be suppressed. Therefore, the turbulence of the air on the side of the air passage extending from the suction port to the outlet can be reduced. Moreover, the cover member is formed such that the enclosure width inward in the fan axial direction on the suction side of the crossflow fan is larger than the enclosure width on the blowout side of the crossflow fan, so that the disturbance in the air passage on the suction side is effective. Can be suppressed.

  Further, a front side gap between the cross flow fan 2 and the stabilizer 13 located on the front side thereof and a rear side gap between the cross flow fan 2 and the guide wall 12 located on the rear side thereof are provided. However, as one aspect of the present invention, the cover member 30 is configured such that a gap between the cross flow fan 2 and the inner side surface of the cover member 30 surrounding the cross flow fan 2 is narrower than the gap on the front side and the gap on the rear side. The structure which sets the diameter dimension of can be employ | adopted.

  According to this configuration, by reducing the volume of the space between the cover member 30 and the side of the cross flow fan 2, turbulence of air flowing into this space can be reduced.

  Further, in the air passage 6 from the suction port 4 to the blowout port 5 in the cabinet, the air flowing in the air passage 6 near the both ends in the axial direction of the cross flow fan 2 flows to the suction side of the cover member 30. A configuration in which gap covering pieces 35 and 36 covering the front gap and the rear gap in the vicinity of both ends in the axial direction of the crossflow fan 2 may be employed so as to prevent the crossflow fan 2.

  By providing the gap covering pieces 35 and 36, the amount of air flowing in the vicinity of both ends in the axial direction of the crossflow fan 2 through the front gap and the rear gap in the vicinity of both ends in the axial direction of the crossflow fan 2 can be reduced. It is possible to suppress air turbulence in the vicinity of both axial ends of the fan 2.

  In this case, in particular, a configuration may be adopted in which the gap covering piece 35 of the rear side gap is integrally formed on the guide wall 12 side and the tip thereof is close to or in contact with the cover member 30. Since the gap covering piece protrudes from the guide wall side, stable dimensional accuracy can be ensured.

  The cover member 30 was divided in the circumferential direction by using the left and right side walls 16 in the cabinet forming the air passage 6 from the suction port 4 to the blowout port 5, the guide wall 12, and the drain pan unit 13 with a stabilizer. A plurality of cover constituent members 37, 38, 39 are formed, and the mating surfaces of these cover constituent members 36, 37, 39 are set so as to cross each other, and the cover constituent member 37 on the guide wall side is another cover constituent member. A configuration in which the cross flow fan 2 is positioned on the inner side in the axial direction than the mating surfaces 38 and 39 can be employed.

  According to the above configuration, since the guide wall 12 formed on the back plate 10 of the cabinet is most stable, the other cover constituent members are regulated by the cover constituent member on the guide wall side among the plurality of cover constituent members 30. By doing so, it is possible to avoid a risk that another cover component member approaches or contacts the cross flow fan due to warpage or the like.

  In addition, this invention is not limited to the said embodiment, Of course, many corrections and changes can be added to the said embodiment within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Heat exchanger 2 Cross flow fan 3 Cabinet 5 Outlet 12 Guide wall 13 Drain pan unit 16 Side wall 30 Cover member 35, 36 Gap cover piece 37, 38, 39 Cover structural member

Claims (6)

An air conditioner provided with a cross flow fan that blows air that has passed through a heat exchanger and the heat exchanger to the air outlet in a cabinet in which an inlet and an air outlet are formed,
The heat exchanger is provided above and in front of the cross flow fan so that air that has passed through the heat exchanger from above and front of the heat exchanger flows into the cross flow fan,
A cover member is provided to cover a side end of the cross flow fan so as to suppress air from flowing to the side of the cross flow fan;
The air conditioner characterized in that the cover member is formed such that a protrusion width inward in the fan axial direction on the suction side of the crossflow fan is larger than a protrusion width on the blowout side of the crossflow fan.   A front side gap between the cross flow fan and a stabilizer located on the front side thereof, and a rear side gap between the cross flow fan and a guide wall located on the rear side thereof are provided, and the cross flow fan The diameter of the cover member is set such that a gap between the cover member and an inner surface of the cover member is narrower than a gap on the front side and a gap on the rear side. Item 2. An air conditioner according to Item 1.   The cross to prevent the air flowing through the air passage from flowing to the suction side of the cover member in the vicinity of both ends of the cross flow fan in the axial direction of the air passage from the suction port to the blowout port in the cabinet. The air conditioner according to claim 2, further comprising a gap cover piece that covers the gap on the front side and the gap on the rear side in the vicinity of both axial ends of the flow fan.   The air conditioner according to claim 3, wherein a gap covering piece of the rear side gap is integrally formed on the guide wall side, and a tip thereof is close to or in contact with the cover member.   The cover member is a plurality of parts divided in the circumferential direction using left and right side walls in the cabinet, the guide walls, and the drain pan unit with the stabilizer that form an air passage from the suction port to the blowout port. The cover constituent member is superposed such that the cover constituent member on the guide wall side is positioned so that the cover constituent member on the guide wall side is positioned on the inner side in the axial direction of the cross flow fan than the mating surface of the other cover constituent member. The air conditioner according to any one of claims 2 to 4, wherein the air conditioner is provided.   The air conditioner according to any one of claims 1 to 5, wherein the suction port is provided on an upper surface and a front surface of the cabinet.