公开(公告)号：JPH10311561A

公开(公告)日：1998-11-24

申请号：JP11929997

申请日：1997-05-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： YABUSHITA AKIHIRO ,  SUZUKI SOUZOU ,  KIDA TAKUMI

IPC: F24F5/00

Abstract: PROBLEM TO BE SOLVED: To average air stream, discharged out of an impeller wheel, from the inner peripheral part to the outer peripheral part of the impeller wheel without generating the collision of air streams in an orifice ring and without biasing to the outer peripheral part of the impeller wheel by a method wherein the discharging part of orifice ring is expanded suddenly toward the outer peripheral direction of the impeller wheel. SOLUTION: An orifice ring 16 is fixed at the tip end of a vane 17 for the outer peripheral part of an impeller wheel 15 while the orifice ring 16 is provided with the shape of bell mouth in the rotating direction of the impeller wheel 15 from a contacting part between the tip end of the vane at the outer peripheral part of the impeller wheel 15 and the orifice ring 16 in a space between the vanes 17 of the impeller wheel 15. On the other hand, a clearance exists between the vane 17 and the orifice ring 16 in a direction opposite to the rotating direction of the impeller wheel 15 while the suction part 16a of the orifice ring 16 is contracted gradually in the inner peripheral direction of the impeller wheel 15 from the suction side of the suction part 16a of the orifice ring 16 toward the discharging side of the same to expand the discharging part 16b of the orifice ring 16 suddenly toward the outer peripheral direction of the impeller wheel 15.

公开(公告)号：JPH10196591A

公开(公告)日：1998-07-31

申请号：JP5397

申请日：1997-01-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： YABUSHITA AKIHIRO ,  SUZUKI SOUZOU ,  KIDA TAKUMI

IPC: F04D29/30 ,  F24F1/00

Abstract: PROBLEM TO BE SOLVED: To prevent the break away of the air flow from an upper edge of an impeller on a negative pressure face of the impeller, and the increase of the disorder, and to unify the distribution of an air flow speed at an outlet of the impeller, by inclining the upper edge part of the impeller in a rotating direction of the impeller. SOLUTION: An impeller 10 of a centrifugal blower, comprises plural blades 11, a main plate 12 for fixing the blades 11, and a side plate 13 having an inlet port, and fixed to a side edge face at a side opposite to the main plate, of the blades, and a motor 5 and a heat exchanger 6 are stored and fixed in a easing 7 with the impeller 10. An inlet ring 8 is curved from an inlet edge part 8a to an outlet edge part 8b, and the outlet edge part 8b is inserted into a side plate 13 of the impeller 10. A diameter of the inlet port of the side plate 13, is larger than an inlet diameter of the impeller, and an upper edge part of the impeller 11 is inclined in a rotating direction of the impeller 10. Thereby the inflow air current can be surely attached to the blade negative pressure faces even under the high hydrostatic pressure condition, and the lowering of the blowing performance, and the increase of the turbulent noise can be prevented.

公开(公告)号：JPH10196590A

公开(公告)日：1998-07-31

申请号：JP5197

申请日：1997-01-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDA TAKUMI ,  SUZUKI SOUZOU ,  YABUSHITA AKIHIRO

IPC: F04D29/30 ,  F04D29/44 ,  F24F1/00

Abstract: PROBLEM TO BE SOLVED: To suppress both blowing noises from a blower and fluid noises generated from a fan guard in a blower adopted to an air conditioner or the like by suppressing large peel-off of air flow at a negative pressure surface of a vane, and also suppressing a speed increase of a discharged air flow. SOLUTION: A sectional shape of a vane 12 at its same diameter cylindrical section on the hub side 12c is rounded on the side of a front edge 12a to form a wing-like shape. A sectional area of the vane 12 at its same diameter cylindrical section on the outer peripheral side is evenly thin. It is thus possible to prevent large peel-off of air inflow from the front edge 12a, and increase of discharged air velocity from a discharge side 12b of the vane 12. It is also possible to suppress turbulance of discharged air flow when it passes a linear nember of a tan guard. It is possible to suppress both blowing noises due to peel-off on the negative pressure surface side of the vane 12 and fluid noises generated from the fan guard.

公开(公告)号：JPH1030591A

公开(公告)日：1998-02-03

申请号：JP18577496

申请日：1996-07-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： YABUSHITA AKIHIRO ,  SUZUKI SOUZOU ,  KIDA TAKUMI

IPC: F04D29/30

Abstract: PROBLEM TO BE SOLVED: To suppress reduction of air sending performance under a high static pressure condition and increase of turbulence noise by setting a minimum impeller inlet diameter and the outer diameter of an impeller to a specified range, inclining an upper end part in an impeller rotational direction, and set an impeller inner circumferential side upstream side end part and a side plate side upstream side end part to nearly the same distance from a main plate. SOLUTION: The minimum impeller inlet diameter D1 of an impeller plate 9 is set to 0.65D2

公开(公告)号：JPH1030590A

公开(公告)日：1998-02-03

申请号：JP18575596

申请日：1996-07-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： YABUSHITA AKIHIRO ,  SUZUKI SOUZOU ,  KIDA TAKUMI

IPC: F04D29/30

Abstract: PROBLEM TO BE SOLVED: To suppress reduction of air blowing performance and increase of turbulence noise by setting an impeller inlet diameter and an impeller outer diameter to a specified range, gradually enlarging the impeller inlet diameter of an impeller plate from a main plate side to a side plate side, enlarging a side plate side end part larger than a side plate suction port diameter, and inclining an impeller plate upper end part in an impeller rotational direction. SOLUTION: The minimum impeller inlet diameter D1 of an impeller plate 9 is set to 0.65D2

公开(公告)号：JPH0719587A

公开(公告)日：1995-01-20

申请号：JP15678893

申请日：1993-06-28

Applicant: MATSUSHITA REFRIGERATION

Inventor： YABUSHITA AKIHIRO ,  SUZUKI SOUZOU ,  KIDA TAKUMI

IPC: F24F13/075 ,  F24F13/08 ,  F24F13/14

Abstract: PURPOSE:To prevent a decrease of the quantity of let-out air and an increase of noise by a method wherein a distance between the center of louver and the wall surface on the outer periphery side of the main body of an outlet is made to be in the range of a prescribed multiple of the opening width of the outlet and the main body or a part of the main body is buried in the ceiling. CONSTITUTION:In a range wherein a set angle theta of a louver 9 is smaller than an angle beta of deflection of an outlet, the center (a) of the louver is positioned inside the outlet 10, the windward-side fore end (b) of the louver is made to be on the leeward of the boundary (d) of a deflected air passage of the outlet and a joining part of the outlet, the leeward-side fore end (c) of the louver is made to be on the leeward of an outlet opening (e), a set distance H of the louver is made to be in the range of being 0.45 to 0.5 times as large as the opening width D of the outlet, and a part of the main body is buried in the ceiling. While a usual operation of a let-out air flow sticking on the wall surface 5a of the ceiling at the time of lateral setting of a blowing direction is maintained, according to this constitution, a setting position of the louver is brought near to the wall surface 10a on the outer periphery side of the main body of the outlet 10 under the condition of lateral-downward resetting of the blowing direction. Thereby hindrance to the let-out air flow is reduced and an increase of a draft resistance of the outlet 10 can be suppressed.

公开(公告)号：JPH0712488A

公开(公告)日：1995-01-17

申请号：JP15050093

申请日：1993-06-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： YANO KENICHIRO ,  SUZUKI SOUZOU

IPC: F28F9/02

Abstract: PURPOSE:To reduce noise generated by a finned tube type heat exchanger, where heat exchange takes place between fluids such as air and refrigerant used in an air conditioner, a refrigerating machine, an automobile equipment and others, without spoiling its heat exchange performance. CONSTITUTION:A finned tube type heat exchanger 11 consists of fins 12 arranged in two or more rows, heat transfer tubes 15 inserted into and jointed to the fins 12, and anti-vibration members 19 attached to the fins 12 that are mounted on the heat transfer tubes 15 near the downstream side of the incoming air flow to the finned tube type heat exchanger 11. Therefore, noise generated by the finned tube type heat exchanger 11 can be reduced without spoiling its heat exchange performance.

公开(公告)号：JPH074388A

公开(公告)日：1995-01-10

申请号：JP14345693

申请日：1993-06-15

Applicant: MATSUSHITA REFRIGERATION

Inventor： YABUSHITA AKIHIRO ,  SUZUKI SOUZOU ,  KIDA TAKUMI

IPC: F04D29/28 ,  F04D29/30 ,  F04D29/66

Abstract: PURPOSE:To suppress the lowering of blowing ability and the increase of turbulent flow and noise efficiently by disposing recessed parts on the negative pressure face side surface of a blade in such a way as to be parallel with a rotary shaft, thereby drawing air flow, going to separate from the negative pressure face side surface, continuously back to the surface of the blade. CONSTITUTION:An impeller 6 is formed of a main plate 3 with plural blades 7 fixed thereto, and a side plate 4 fixed to the anti-main plate side end face of the blade 7. In this case, recessed parts 8 are disposed on the negative pressure face 7a side surface of the blade 7 in such a way as to be parallel with a rotary shaft, and air flow going to separate from the negative pressure face 7a side surface of the blade 7 in association with the rotation of the impeller 6 is drawn back to the surface of the blade 7 continuously by the action of the recessed parts 8. The lowering of blowing ability and the increase of turbulent flow and noise can be thereby suppressed efficiently without complicating the shape of the blade 7.

公开(公告)号：JPH06101937A

公开(公告)日：1994-04-12

申请号：JP25106092

申请日：1992-09-21

Applicant: MATSUSHITA REFRIGERATION

Inventor： SUZUKI SOUZOU ,  YABUSHITA AKIHIRO ,  YANO KENICHIRO

IPC: F25B41/00 ,  G10K11/16

Abstract: PURPOSE:To obtain a refrigerating apparatus which suppresses the collection of liquid refrigerant in a hollow type muffler, even when the refrigerant in a two phase state flows in a capillary tube, and which prevents the increasing of noise level and the development of unusual noises due to a decrease in the volume of a hollow body and its irregular variations. CONSTITUTION:A muffler 8 consists of a conduit tube part 9 made of an air- impermeable, sound-transmittible material for allowing refrigerant to flow therethrough, an outer covering 10 over the conduit tube part 9 and a hollow part defined between the conduit tube part 9 and the outer covering 10 and this muffler 8 is provided between a capillary tube 4 and an evaporator.

公开(公告)号：JPH0694331A

公开(公告)日：1994-04-05

申请号：JP24627892

申请日：1992-09-16

Applicant: MATSUSHITA REFRIGERATION

Inventor： SUZUKI SOUZOU ,  KASE HIROAKI ,  YANO KENICHIRO

IPC: F25B41/00

Abstract: PURPOSE:To restrict occurrence of abnormal pulsation of pressure caused by a rapid expansion of refrigerant within an expansion type muffler even in the case that the refrigerant in its mixed phase state or in its liquid phase state is flowed within a pressure reducing unit and to restrict or reduce occurrence of refrigerant noise without damaging an effect of sound muffling action of the expansion type muffler in the case that the refrigerant in the gaseous phase state is flowed within the pressure reducing unit. CONSTITUTION:A freezer device is comprised of a changing-over valve 8 installed between a pressure reducing unit 4 and an evaporator 5, a first passage 9 communicating directly from the changing-over valve 8 to the evaporator 5, a second passage 11 having a muffler 10 installed between the changing-over valve 8 and the evaporator 5, a refrigerant phase state sensing means for refrigerant passing through the pressure reducing unit 4, and a changing-over valve control means. The changing-over valve control means controls the changing- over valve 8 with the phase state of the refrigerant being inputted.