公开(公告)号：JP2523618B2

公开(公告)日：1996-08-14

申请号：JP9028487

申请日：1987-04-13

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDO OSAO ,  FUJIMOTO SHINJI ,  KOMA HACHIRO ,  IDE SHINICHI ,  KASE HIROAKI

IPC: F28F1/30 ,  F28D1/053 ,  F28F1/12 ,  F28F1/32

公开(公告)号：JPH0455664A

公开(公告)日：1992-02-24

申请号：JP16471990

申请日：1990-06-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： TAIRA TERUHIKO ,  NAKAYAMA KOICHI ,  IDE SHINICHI ,  MATSUNAGA TAKESHI

IPC: F25B39/00

Abstract: PURPOSE:To uniformly divide the flow of a refrigerant and to prevent lowering of heat exchange performance of a heat exchanger serving as a condenser by a method wherein a flow passage on-off valve for intercoupling first and second connection pipes and a small part is provided and the small part being finer than the second connection pipe running between a hollow body 2 and an outflow inflow pipe is located to the first connection pipe. CONSTITUTION:When a heat exchanger 15B is used as a condenser, a refrigerant flows in a reverse direction to that during vaporization, and a flow passage on-off valve 5 is in an opening state. In this case, since the first connection pipe 3 has a small part 3n being finer than a second connection pipe 4, a pressure loss of a refrigerant R at the small part 3n is high. When the refrigerant R flows out from a hollow body 2, it flows out through a second connection pipe 4, having a low pressure loss, to an outflow inflow pipe 3i. The second connection pipe 4 is located to the lower end part of the hollow body 2. At a heat exchanger 15B, the condensed refrigerant R is caused to smoothly flow out without residing in heat transfer pipes 6 and the hollow body 2. By changing a flow route for a refrigerant by opening and closing a flow passage on-off valve 5 according to a condensing period and a vaporizing period, a refrigerant is uniformly divided, and heat exchange performance of the heat exchanger 15B can be increased to a maximum.

公开(公告)号：JPH03195892A

公开(公告)日：1991-08-27

申请号：JP33722089

申请日：1989-12-26

Applicant: MATSUSHITA REFRIGERATION ,  MATSUSHITA ELECTRIC IND CO LTD

Inventor： TAIRA TERUHIKO ,  NAKAYAMA KOICHI ,  IDE SHINICHI ,  AOYANAGI OSAMU

IPC: F28F1/32

Abstract: PURPOSE:To enhance heat exchange capacity by a method wherein cut and raised parts are monolithically formed between heat transfer pipes adjacent each other in a stage direction in the vicinity of the edge part of a fin and divided into two or more stages only in the vicinity of the heat transfer pipes adjacent in a row direction and the leg parts adjacent to the heat transfer pipes are provided so as to surround the heat transfer pipes. CONSTITUTION:Heat transfer pipes 13 arranged in a zigzag state are inserted in a fin 12 in a close contact state. Cut and raised parts 12b are provided in two stages so as to leave the fin base part 12c therebetween and, by the heat conduction in the fin base part 12c, the mean heat conducting distance of the heat transfer pipes from the part on the upstream or downstream side of an air stream A becomes short and fin efficiency is enhanced. The leg parts 12f of the cut and raised parts 12b are provided on the downstream side of the air stream A with respect to the heat transfer pipes 13 and, since Coanda effect of the air stream A is generated in the leg parts 12b and the leg parts 12d, 12e adjacent to the heat transfer pipes 13 are provided so as to surround the heat transfer pipes 13, the air stream A flows so as to surround the heat transfer pipes 13 by the effect of the speed boundary layers developed by the leg parts and dead water areas 14 are reduced and the effective heat transfer area of the fin increases.

公开(公告)号：JPH0297897A

公开(公告)日：1990-04-10

申请号：JP24822188

申请日：1988-09-30

Applicant: MATSUSHITA REFRIGERATION

Inventor： SUGA HIROAKI ,  KOMA HACHIRO ,  NAKAYAMA KOICHI ,  IDE SHINICHI

IPC: F28D1/047 ,  F28F1/32

Abstract: PURPOSE:To lengthen the period of defrosting and improve the capacity of space heating operation by a method wherein the width of fins in the row of airflow inflow side the rows of group of fins, which are fitted to heat transfer tubes among a plurality of rows of the group of heat transfer tubes, through which refrigerant flows, is widened broader than the width of the fins for the group of the tubes in the row at the outflow side of the air flow. CONSTITUTION:The width R11 of fins in the group 13 of fins, which are fitted to the group 11 of heat transfer tubes at the inflow side of airflow B, is widened broader than the width of fins in the group 14 of fins for group 12 of the heat transfer tubes at the outflow side of the air flow B while the pitch D11 of the heat transfer tubes in the group 11 of the same is lengthened longer than the pitch D12 of the heat transfer tubes in the group 12. According to this method, the efficiency of the fins in the group 13 of the same becomes lower as compared with the efficiency of the fins in the group 14 whereby the frosting on the heat transfer tubes in the inflow side of the airflow B is mitigated. On the other hand, the width of ventilating passages themselves for the tubes in the inflow side of the airflow B becomes wider. Accordingly, the amount of frost adhered to the fins in the group 13 and the heat transfer tubes in the group 11 at the inflow side of the airflow B per unit area can be made equal to the amount of frost adhered to the fins and tubes in the groups at outflow side of the airflow B is whereby the ventilating passages may be secured for along period of time. As a result, the period of defrosting may be lengthened.

公开(公告)号：JPH0271063A

公开(公告)日：1990-03-09

申请号：JP22175688

申请日：1988-09-05

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOMA HACHIRO ,  NAKAYAMA KOICHI ,  IDE SHINICHI ,  SUGA HIROAKI ,  KASE HIROAKI

IPC: F25B41/00

Abstract: PURPOSE:To stabilize refrigerant branching ratio to a flow-out side tube even if the circulating amount or drying degree of refrigerant is varied by extruding both ends as flow-out side tube substantially from its center to integrally mold it, and increasing the bore of the tube end layer than the bore of the flow-out side tube near a connector thereto. CONSTITUTION:The bore of a flow-in side tube 62 is smaller than those of flow-out side tubes 64a, 64b, and the bore of the end 63 of the tube 62 is larger than the of the tube 52 to be equal to the bores of the tubes 64a, 64b. Since the bore d2 of the tube 62 is smaller than that d1 of the end 63 of the tube 62, the flow of refrigerant separated into gas and liquid, fed to a branching unit 61 through a refrigerant tube 66 is throttled at the tube 62, the gas and the liquid are mixed, and the flowing speed is accelerated. Thus, the flow is scarcely deflected toward the direction of gravity, and the adherence of the flow to the inner wall 65 of the branching unit is scarcely taken place.

公开(公告)号：JPH028667A

公开(公告)日：1990-01-12

申请号：JP15858088

申请日：1988-06-27

Applicant: MATSUSHITA REFRIGERATION

Inventor： KOMA HACHIRO ,  NAKAYAMA KOICHI ,  IDE SHINICHI ,  SUGA HIROAKI ,  KASE HIROAKI

IPC: F25B41/00

Abstract: PURPOSE:To keep an equaly divided flow and reduce a pressure loss of a coolant flow by a method wherein a sealed pipe end is provided with a hole smaller than the inner diameter to form a flowing-in end pipe, a flowing-out pipe end is bent to have such a shape as one to reverse its direction of flow and the flowing-in pipe end is displaced to a branched pipe side. CONSTITUTION:When a heat exchanger is an evaporator, coolant is separately flowed as a liquid coolant 24 and a coolant vapor 25 from a direction of arrow 27. Since a diameter of a small hole 22 opened at a flowing-in pipe end 21b of a flow divider 21 is smaller than an inner diameter of a coolant pipe 29, its flow is throttled. The liquid coolant 24 and the coolant vapor 25 are mixed to each other to form a uniform gas-liquid mixture flow 26, directed toward a branched part 23 and further divided into directions shown by arrows 28a and 28b, respectively. In addition, since a height from the flowing-in pipe end 21b to the branch part 23 is small, the gas-liquid mixture flow 26 may not be influenced by its own weight (g) even if its injection speed is not so fast and this an equal and uniform divided flow can be realized.

公开(公告)号：JPH01234764A

公开(公告)日：1989-09-20

申请号：JP5878988

申请日：1988-03-11

Applicant: MATSUSHITA REFRIGERATION

Inventor： IDE SHINICHI ,  KIDO OSAO

IPC: F25B41/00

Abstract: PURPOSE:To obtain the stable mass flow diversion ratio of a refrigerant, without being affected by the shape of a branch part, by providing the title device comprising a discharge pipe having a plurality of outlet ports, an introduction pipe communicating to the substantially central part of the discharge pipe, and an inlet pipe welded to the introduction pipe, and by forming the tip end of the inlet pipe into a nozzle shape. CONSTITUTION:A refrigerant 17 is in the form of a two-phase flow consisting of a vapor phase portion 17a and a liquid phase portion 17b. In an inlet pipe 13a, the vapor phase portion 17a which is light in specific gravity and the liquid phase portion 17b which is heavy in specific gravity are separated from each other so that the vapor phase portion 17a flows through the upper part of the inlet pipe 13a and the liquid phase portion 17b flows through the lower part thereof. Then, the refrigerant 17 advances toward the nozzle-shaped part of the inlet pipe 13a, and at this part, the vapor phase portion 17a and the liquid phase portion 17b, which have been separated from each other, are mixed with each other, so that a flow speed increases and the influence of gravity 18 is reduced, whereby the mass flow diversion ratio of the refrigerant 17 at the respective upper and lower parts of a discharge pipe 14 is equalized. As the refrigerant 17 does not impinge against a branch part 19, the stable mass flow diversion ratio is obtained without being affected by irregularity in the shape of the branch part 19.

公开(公告)号：JPH01121667A

公开(公告)日：1989-05-15

申请号：JP28126387

申请日：1987-11-06

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDO OSAO ,  IDE SHINICHI

IPC: F25B41/00

Abstract: PURPOSE: To distribute a refrigerant uniformly when a distributor is set in the horizontal or inclining direction by fixing the inlet while shifting it upward of the gravitational direction from the center line of a hollow body in the flow- out direction of refrigerant. CONSTITUTION: When a refrigerant distributor is set in an inclining or horizontal direction, a liquid phase B2 heavier than a gas phase B1 tries to flow more toward an outlet 8b on the oblique lower side in a hollow body 6 under influence of gravity (h). When an inlet 7 is fixed to one end of the hollow body 6 at a position higher by the width C than the center line (n), the liquid phase B2 also flows easily toward an upper outlet 8a close to the line direction. Consequently, the gravity (h) and the width (c) of eccentricity are balanced and the liquid phase B2 flows uniformly toward the upper and lower outlets 8a, 8b resulting in uniform distribution of refrigerant B to a delivery pipe 10.

公开(公告)号：JPS6414597A

公开(公告)日：1989-01-18

申请号：JP16722987

申请日：1987-07-03

Applicant: MATSUSHITA REFRIGERATION

Inventor： IDE SHINICHI ,  NAKAYAMA KOICHI ,  SUGA HIROAKI ,  KOMA HACHIRO ,  KATO KAORU

IPC: F28F1/32

Abstract: PURPOSE:To obtain a heat exchanging device which uniformizes the flow velocity distribution of gas and increases the quantity of heat exchange to a great extent, by a method wherein the device is constituted of the group of heat transfer fins inserted into and made to closely adhere to the group of heat transfer tubes through the interior of which a fluid flows, and bent tongues are provided on the heat transfer fins in the vicinity of a fan. CONSTITUTION:A refrigerant such as fleon and water flows through the interior of the group of heat transfer tubes 12. On the other hand, by means of a fan 14, gas such as air flows among the group of fins 13 which are inserted in and made to adhere to the heat transfer tube group 12. In this method, heat exchange is carried out between the refrigerant of fleon and water or the like and the gas such as the air. Since bent tongues 24 are also provided on the group of the fins 13 in the vicinity of the fan 14, air resistance is increased in the vicinity of the fan 14. Accordingly, the flow velocity of the gas in the vicinity of the fan 14 becomes slow while the flow velocity of the air current, which has been slow in the part far from the fan 14, becomes rapid. As a result, the flow velocity distribution of the gas passing through among the fin group 13 is uniformized to increase the quantity of heat exchange to a great extent.

公开(公告)号：JPS6383591A

公开(公告)日：1988-04-14

申请号：JP22903486

申请日：1986-09-26

Applicant: MATSUSHITA REFRIGERATION

Inventor： KIDO OSAO ,  FUJIMOTO SHINJI ,  TANNO SATOSHI ,  IDE SHINICHI

IPC: F28F1/30 ,  F28D1/047 ,  F28F1/12 ,  F28F1/32

Abstract: PURPOSE:To obtain a high heat transfer rate in the whole area of a fin, by a method wherein slit pieces, cut-and-raised so that the cut-and-raised surface becomes parallel substantially to the flow direction of air, are provided on the surface of a fin while a part near the leading edge of the cut-and-raised surface is bent to provide a bent piece, opposing to an airflow substantially, on the slit piece. CONSTITUTION:Heat exchange is effected between airflow B, which flows between fins 4, and heat medium, which flows through the inside of a flat tube 1, through the fins 4 and the flat tubes 1. In this case, the fin 4 is divided into small pieces in the direction of the airflow B by slit pieces 5, therefore, the growth of the temperature boundary layer (d) of the airflow B, which is generated between fins 4, is restricted. Further, the airflow B collides against the bent piece 6 provided on the leading edge of the slit piece 5 whereby the temperature boundary layer (d) of the airflow B, which is formed by the upstream side slit piece 5 and kept as it is, is divided perfectly into small pieces. Furthermore, burbling eddies, which are extremely disturbed flows, are generated in the airflow B collided against the bent pieces 6 at the downstream side of the bent pieces 6 whereby re-adhesion effect may be obtained by the arrival of the burbling eddies at the cut-and-raised surfaces 5' of the cut-and-raised pieces 5.